The present invention is related to a power supply device incorporating a rechargeable secondary battery in an outer case, especially a portable power supply device connectable outside to electric equipment for supplying power.
In accordance with portable electric devices, portable power supply devices called an auxiliary power supply device or a booster have been developed and supplied. Such portable power supply devices incorporate a secondary battery, and the incorporated secondary battery is charged with supplied power, and the secondary battery is discharged to supply power to external electric devices.
As such a portable power supply device, a power supply device which incorporates a pair of cylindrical batteries, has been developed (refer to patent literature 1). As shown in an exploded perspective view of
As this portable power supply device is used to charge the portable electric device such as a mobile phone or a smart phone when users go out, weight reduction or thinning of it is required to easily carry it. In contrast, it is required to incorporate a large capacity of the secondary battery in order to use more power. In place of the cylindrical battery, a portable power supply device which incorporates a prismatic battery, in other words, a rectangular parallelepiped battery having an excellent space efficiency, have been developed.
Under this circumstance, in order that the large capacity of the secondary battery is efficiently disposed in a limited space and also the outer size of the portable power supply device is made compact, it is necessary to make a case thin. However, mechanical strength is decreased when thickness of the case is made thin. Especially, when the portable power supply device is carried, it is thought that impact force by dropping or a collision with others is added from outside. Then, appropriate strength is required.
For example, the following impact test is carried out. A cylindrical bar of φ (diameter) 16 mm is disposed on the portable power supply device, and a weight of 9.1 kgf is dropped from a height of 610 mm on the cylindrical bar. The impact force in this case is 89.2 N (9.1 kgf)×0.61 m=54.4 J. In order to correspond to this impact of about 55 J, the thickness of 3 mm or more is necessary when the case is made of polycarbonate resin.
However, generally, the case is made of a resin having an excellent insulation property. When the thickness of the resin case is large, there is a problem generating the sink of a resin when hardening a resin. For example, the thickness of 3 mm or more causes the sink of the resin in the case of polycarbonate resin.
A conventional portable power supply device disclosed in patent literature 2 contains a box-shaped outer case which is configured by two of dish-shaped case members, and secondary batteries stored in the space inside an outer case. In one of the two case members, an inner rib is formed in parallel to its side wall in spaced relationship with its side wall, and in the other of the two case members, the end edge of its wall is fitted between the side wall of the one of the two case members and the inner rib.
In the conventional portable power supply device, as the end edge of the other case member is fitted between the side wall of and the inner rib, it does not have enough strength against the impact force from outside.
Patent Literature 1: Japanese Laid-Open Patent Publication No. 2009-131089
Patent Literature 2: Japanese Laid-Open Patent Publication No. 2010-153214
The present disclosure is developed for the purpose of solving such drawbacks. One non-limiting and explanatory embodiment provides a portable power supply device which has an enhanced hardness without making a case thick.
A power supply device of the present disclosure connectable to electric equipment for supplying power comprises a main body case divided into a first case and a second case, and having an extending shape in one direction, a secondary battery incorporated in the main body case, and a battery holder for holding the secondary battery, and the second case has a box shape having a bottom portion, and a pair of case side walls in a longitudinal direction, and the battery holder has a pair of holder side walls to hold both sides of the secondary battery, and the holder side walls are formed so as to extend upward along at least a part of the case side walls from the bottom portion of the second case in a state where the battery holder is stored in the main body case, and the holder side walls are lower than the case side walls in height, and end edges where side walls of the first case and the side walls of the second case are joined, have step shapes in a vertical sectional view perpendicular to the longitudinal direction, and the second case has a step-shaped projection at an end edge side of the second case, the projection extending toward the first case side at an inner surface side of the main body case, and the first case has an outer surface extending portion at an end edge side of the first case, the outer surface extending portion extending toward the second case side at an outer surface side of the main body case, and an inner surface extending portion at the end edge side of the first case, the inner surface extending portion extending along an inner surface of the second case, and the outer surface extending portion and the inner surface extending portion of the first case sandwich the step-shaped projection of the second case in a state where the first case and the second case are joined, and wherein upper end edges of the holder side walls are in contact with and support a lower end edge of the inner surface extending portion.
In the power supply device of the present disclosure, a thickness of the main outer case is 1 mm to 3 mm.
In the power supply device of the present disclosure, the battery holder has a coil storing portion to store a power reception coil for non-contact charging. Accordingly, the secondary battery of the power supply device is charged by non-contact with power from the outside. Thus, the member storing the power reception coil can reinforce the side walls of the main body case. Then, the member is used for several purposes, and the structure can be simplified, and cost is reduced
The power supply device of the present disclosure further comprises a covering portion having flexibility for covering the first case, and the covering portion has a cover projecting portion which projects inward approximately in parallel with and in spaced relationship with a main surface thereof, and the first case has a fitting groove in the side walls for receiving the cover projecting portion. Accordingly, by covering the surface of the main body case with the covering portion having flexibility, in a case where external force is applied or added to the surface, stress is relaxed, and then members stored inside are protected. Further, the surface of the main body case or the electric equipment close to or mounted on this is prevented from being damaged. The cover projecting portion is fitted into the fitting groove, and then the covering portion is prevented from abruptly coming off.
In the power supply device of the present disclosure, the first case includes a partially recessed finger catching portion formed in a surface at an approximate center of a short direction perpendicular to the longitudinal direction at the boundary adjacent to the covering portion. Accordingly, as a user hooks a finger at the finger catching portion at changing the covering portions, the covering portion is easily detached and changed. Especially, tensile strength of the covering portion is weak around the center in the longitudinal direction, and then the covering portion easily comes off. When the finger catching portion is provided at this location, the covering portion more easily comes off. As the finger catching portion is provided in the short direction, it is prevented to easily come off.
In the power supply device of the present disclosure, a switch portion is provided at a location decentered from a center in the longitudinal direction. Accordingly, the switch portion can be disposed at a location where the switch portion contacts the secondary battery.
In the power supply device of the present disclosure, the covering portion has a cover side switch mark which indicates that the switch portion exists thereunder at a location corresponding to the switch portion in a state where the covering portion covers the first case. Accordingly, even though the covering portion covers the first case, a user can confirm by sight the location of the switch portion by using the cover side switch mark, and then the user can operate the switch portion through the covering portion.
The power supply device of the present disclosure further comprises a label portion stuck on an upper surface of the first case so as to cover the switch portion, and the label portion has a label side switch mark which indicates that the switch portion exists thereunder at a location corresponding to the switch portion. Accordingly, a user can confirm by sight the location of the switch portion by using the label side switch mark, and then the user can operate the switch through the label. Especially, the location of the switch portion can be confirmed by sight even in a state where the covering portion is detached, and then the portable power supply device can be used even without the covering portion. As the label side switch mark is also printed on the label where specification or the like is described, a number of parts is decreased, and manufacturing cost can be reduced.
In the power supply device of the present disclosure, the label side switch mark of the label portion is formed by embossing.
In the power supply device of the present disclosure, the covering portion has a positioning projection at a location which is not symmetrical with respect to the center in the longitudinal direction on an inner surface of the cover projecting portion, and the first case has a positioning recess portion formed to engage with the positioning projection at a location corresponding to the positioning projection. Accordingly, the positioning projection is engaged with the positioning recess portion, and then the fitting state of the covering portion and the first case can be strengthened. In addition, as the covering portion is not symmetrical, it prevents the covering portion from being set in the reverse posture. Especially, when the switch portion is provided at the location which is not symmetrical in the longitudinal direction, the covering portion can be set in the proper covering posture, and then it is prevented that the locations of the cover side switch mark and the switch portion are misaligned
In the power supply device of the present disclosure, the positioning projection and the finger catching portion are provide at a same short side of the first case. Accordingly, the covering portion is detached from the first case, by the finger catching portion at the engaging portion of the first case and the covering portion securely engaged by the positioning projection for positioning, and then such detaching process can be smoothly carried out.
A power supply device of the present disclosure connectable to electric equipment for supplying power, comprises a main body case divided into a first case and a second case, and having an extending shape in one direction, and a secondary battery incorporated in the main body case, and the second case has a box shape having a bottom portion, a pair of case side was in a longitudinal direction, and an inner peripheral wall disposed inside the case side walls and along the case side walls, and the inner peripheral wall has a pair of support walls to hold both sides of the secondary battery, the support walls are formed so as to extend upward along at least a part of the case side walls from the bottom portion of the second case, and the support walls are lower than the case side walls in height, and the upper end edges of the support walls are in contact with and support the first case, and the first case has inner side walls which are fitted between the case side walls and the inner peripheral wall.
In the power supply device of the present disclosure, each of the support walls is a U-shaped wall which comprises a portion parallel to the case side walls, and portions orthogonal to the case side walls
The power supply device of the present disclosure further comprises a circuit board disposed adjacent to the secondary battery in a extending direction of the secondary battery, and a heat radiation plate which is thermally coupled to heat generation parts of the circuit board and is disposed under the circuit board, and there is a space between the second case and the heat radiation plate.
In the power supply device of the present disclosure, the secondary battery is a prismatic secondary battery.
In the present disclosure, the holder side walls can support a part of the first case, and then the first case is supported by an area larger than a sectional area of the case side walls of the second case. The thickness of the case side walls is kept, and substantially it has the same strength as the thickness of the second case is enlarged. Especially, as the holder side walls for holding the secondary battery reinforce the side walls of the main body case, strength can be improved without increasing the number of parts, without enlarging the thickness of the case side walls.
In the present disclosure, as the inner peripheral wall of the second case is fitted to the inner side wall of the first case, strength is enlarged. Additionally, as the top end portions of the U-shaped walls contact the inner side of the upper portion of the first case, strength is enlarged against impact in the vertical direction.
As the prismatic secondary battery having a rectangular shape in a plan view is stored inside the U-shaped walls, the U-shaped walls position the secondary battery, and also keeps the space between the secondary battery and the case side walls, and then this space becomes a buffer zone against impact force from the outside, and the impact force is not directly applied to the secondary battery. Strength can be improved without enlarging the thickness of the case side walls.
Hereinafter, the embodiment of the present invention will be described referring to drawings. Furthermore, in the description below, identical names and reference numbers represent identical or homogeneous members, and detailed descriptions are appropriately omitted. Moreover, mode may be applied where each element constituting the present invention constitutes a plurality of elements with the use of the same member, thereby serving the plurality of elements with the use of one member, or, in contrast, mode may be realized where a function of the one member is shared by a plurality of members. Also, a portion of examples and the content described in the embodiments can be applied to other examples and another embodiment.
A portable power supply device 100 related to an embodiment 1 of the present invention is shown in
The portable power supply device 100 comprises a main body case 10, a battery holder 20 where secondary batteries 1 and a circuit board 30 are set in the main body case 10. In the portable power supply device 100, power of the secondary batteries 1 is discharged from an outer output terminal 31 exposed outside, and activates electric equipment BD, or charges a secondary battery incorporated in the electric equipment BD. In the example shown in
The electric equipment BD to which the portable power supply device 100 supplies power includes a mobile phone, a smart phone, a portable music player, a portable game device, a tablet type PC, or a note-book type PC, and also includes an auxiliary power supply device or a booster which charges these portable electric equipment devices.
The portable power supply device 100 shown in
The main body case 10 has an approximate box shape extending in one direction. Corner rounding chamfering prevents other objects from being damaged at carrying it. As shown in exploded perspective views of
The first case 11 at the upper surface side of the portable power supply device 100 is covered with a covering portion 60. The covering portion 60 is made of flexible material. Concretely, it is made of silicone rubber.
The main body case 10 incorporates 2 pieces of the secondary batteries 1. These secondary batteries 1 are held by a battery holder 20. The battery holder 20 has a pair of holder side walls 22, and both sides of the secondary batteries 1 are sandwiched and fixed between the holder side walls 22 to hold the secondary batteries 1. The secondary battery 1 is a prismatic battery, in other words, a rectangular parallelepiped battery having the thickness smaller than the widths. By this, the secondary batteries 1 are efficiently disposed in the main body case, compared with the cylindrical secondary battery. It enables the main body case to be thinner. However, in the present invention, the secondary battery is not limited to the thin prismatic battery. For example, one thick prismatic battery, a polymer battery, or the cylindrical batteries arranged in the horizontal direction can be used. The known rechargeable secondary battery such as a lithium ion secondary battery, a nickel-hydrogen battery, or a nickel cadmium battery can be used as the secondary battery.
The main body case 10 constituting the outer appearance of the portable power supply device 100 has a box shape to chamfer the outer shape. The main body case 10 has a rectangular shape in a plan view to chamfer the corners. By chamfering, edge portions are decreased, and then it is convenient for carrying. In a side view, it has a rectangular shape having the thickness smaller the width, and the corners at the bottom surface side are chamfered. As the corners of the upper surface side are not chamfered, and as shown in
This main body case 10 is made of a resin having an excellent insulation property, for example, such as polycarbonate resin. The size of the main body case is designed such that two pieces of the thin type of the secondary batteries 1 are stacked and the circuit board 30 is disposed at one end side in the longitudinal direction in the main body case 10.
As shown in an outer perspective view of
As shown in
The switch portion 33, the outer output terminal 31, and the power supplied terminal 32 are mounted on the circuit board 30 described below. The circuit board 30 is fixed at the battery holder 30. In a state where the battery holder 20 is stored in the main body case 10, the switch portion 33, the outer output terminal 31, and the power supplied terminal 32 are exposed through the terminal windows 14 opened in the main body case 10.
As shown in
Bosses 16 for fixing by screw are provided in each of the internal surfaces of the first case 11 and the second case 12. The bosses 16 are provided at two locations. Further, holder side bosses 24 for penetrating are provided also at the battery holder 20. These bosses 16 are disposed in spaced relationship with each other on a diagonal line of the circuit board 30. In other words, as the bosses are not disposed at a portion where the secondary battery 1 is stored, it prevents the main body case from being enlarged by providing the bosses. The boss for fixing by screw is not provided around the secondary battery 1, but by the above fitting structure, the first case 11 and the second case 12 are coupled. Thus, by both of fixing by screw and the fitting structure, the coupling structure of the first case and the second case becomes compact, and then coupling strength is kept.
As mentioned above, the main surface of the first case 11 is covered with the flexible covering portion 60 made of silicone. By covering the upper surface of the main body case 10 with the covering portion 60 having flexibility, in a case where the electric equipment for receiving power is mounted on this upper surface as the mounting surface, the electric equipment during receiving power is stably held since friction coefficient of the mounting surface is high, and it prevents the electric equipment from slipping down. At the time of carrying it, in a case where external force is applied or added to the upper surface by dropping it or impact against other members, stress is relaxed, and then members stored inside are protected. Further, the upper surface of the main body case or the electric equipment mounted on this upper surface is prevented from being damaged.
Additionally, the covering portion 60 is removably attached. For example, the covering portions 60 having different designs in a color tone or a pattern are prepared, and then the covering portion 60 can be charged to another design for enjoying.
The thickness of 3 mm or more in the first case 11 can withstand the impact force of 55 J, and the sink generated in the first case 11 is covered with the covering portion 60. In another way, the thickness of the first case 11 is 2.5 mm to 3.0 mm, and the thickness of the covering portion 60 is 1.0 mm to 2.0 mm. Therefore, the sink of the first case 11 is not generated. As the total thickness of the first case 11 and the covering portion 60 is 3.5 mm to 5.0 mm, it can withstand the impact force of 55 J. The portable power supply device 100 has the outer appearance without the sink, and withstands the impact force of 55 J from the outside.
This cover portion 60 has a cover projecting portion 62 which projects inward in approximate parallel with and in spaced relationship with the main surface. A fitting groove 15 into which the cover projecting portion 62 is fitted, is formed at the side walls of the first case 11. By this structure, the covering portion 60 and the main body case 10 are strongly coupled. At the time of carrying the portable power supply device, for example, when the portable power supply device put in a bag contacts other members, the covering portion is prevented from abruptly coming off.
By enhancing the hardness of the covering portion 60, it prevents the covering portion 60 from being easily deformed, and then the covering portion 60 is more prevented from coming off. For example, it is preferable that the hardness of the covering portion 60 is Hs 40 to Hs 70. By this, the deformation of the covering portion is suppressed so as not to easily come off, and at the time of carrying the portable power supply device, the covering portion is prevented from abruptly coming off.
It is preferable that a projection length of the cover projecting portion 62 which is fitted into the fitting groove 15 is appropriately kept and it increases the strength of fitting. For example, the projection length of the cover projecting portion 62 which is fitted into the fitting groove 15 is 1.1 mm to 2.0 mm. Thus, as it has adequate friction strength and holding strength, the covering portion cannot easily come off the first case.
In a state where the first case 11 is covered with the covering portion 60, it is preferable that the side surface of the covering portion 60 and the side surface of the main body case 10 are disposed in the approximately same plane. As shown in an enlarged sectional view of
On the contrary, when coupling strength between the covering portion and the main body case is enhanced, it is difficult to detach the covering portion at changing the covering portions. In the embodiment 1, as shown in
It is preferable that the finger catching portion 44 is provided at a location where coupling of the first case and the covering portion is weak. In this example, the finger catching portion 44 which is partially recessed at the approximate center of the short direction in the surface of the first case 11 at the boundary adjacent to the covering portion 60, is formed. As the corner portions of the covering portion 60 are tightly coupled to the first case 11, the covering portion 60 is not easily detached. In contrast, as tensile strength of the covering portion 60 is weak around the center in the longitudinal direction, when the finger catching portion 44 is formed at this location, there is a possibility that the covering portion 60 unintentionally come off by contacting other members. Therefore, as the finger catching portion 44 is formed at the short side where there is a low possibility that it contacts other members, the covering portion is prevented from abruptly coming off. In the embodiment 1, as shown in a perspective view from the rear side of
The battery holder 20 holds the secondary batteries 1 or the circuit board 30 in the main body case 10, and positions those. As shown in a exploded perspective view of
Here, the battery holder 30 stores two sheets of the prismatic batteries of the secondary batteries 1 in a state of being stacked. However, the portable power supply device 100 does not limit the secondary battery to two sheets, and can use one sheet, or three or more sheets. The number of the secondary battery 1 is decided based on needs of required capacity, outer appearance shape, or weight.
The two sheets of the prismatic batteries are stuck with two-faced adhesive tapes. As shown in a sectional view of
The holder side walls 22 of the battery holder 20 also reinforce side walls of the main body case 10 in a state where the battery holder 20 is stored in the main body case 10. Concretely, the holder side walls 22 are formed so as to extend upward along at least a part of the pair of the case side walls 12a from the bottom portion of the second case 12 in a state where the battery holder 20 is stored in the main body case 10.
The end edges where side walls of the first case 11 and the side walls of the second case 12 are joined, have step shapes in a vertical sectional view perpendicular to the longitudinal direction. As shown in the enlarged sectional view of
The first case 11 has an outer surface extending portion 11b at which the end edge side of the first case 11 extends toward the second case 12 side at an outer surface side of the main body case 10, and also has an inner surface extending portion 11c at which the end edge side of the first case 11 extends along an inner surface of the second case 12. In a state where the first case 11 and the second case 12 are joined, the step-shaped projection 12b of the end edge of the second case 12 is sandwiched and fixed between the outer surface extending portion 11b and the inner surface extending portion 11c. By this spigot joint structure, the joint surfaces or portions of the first case 11 and the second case 12 are strongly coupled, and strength of the side walls in the main body case 10 is enhanced.
Further, as the portable power supply device is carried and used, appropriate strength is required. More improvement of strength is required to withstand impact of dropping or the like. However, when the thickness of the main body case is large, the size is increased, and also there is a problem that the sink of a resin is generated when hardening a resin in resin molding and an outer appearance or strength becomes bad. Especially, when the secondary battery is charged by non-contact charging as mentioned below and a power reception coil 40 is disposed on the bottom surface of the main body case, it is necessary to thin the thickness of the bottom surface of the main body case to closely dispose these coils for enhancing electromagnetic coupling efficiency of the power reception coil 40 and a power transmission coil 51. As a result, in the thickness of the main body case, the bottom surface is thin, and the side surface is thick, and then the thickness is uneven, and the sink is more remarkably generated.
In this embodiment, to improve strength without enlarging the thickness of the main body case, the holder side walls 22 of the battery holder 20 are used. Namely, the holder side walls 22 and the side wall of the second case 12 are overlapped, and both of them support the end edge of the first case 11. Substantially, it has the same effect as the thickness of the second case 12 is enlarged, strength in the side walls of the main body case can be improved.
Concretely, as shown in
For example, the thickness of the case side wall 12a, and the thickness of the holder side wall 22 of the battery holder 20 are set at 1.0 mm to 2.5 mm, and then the sink in the case side wall 12a is not generated. The total thickness of the case side wall 12a and holder side wall 22 is set at 3.0 mm to 5.0 mm, and then its strength withstands impact of 55 J. Thus, the sink in the outer appearance of the portable power supply device 100 is extremely suppressed, and the portable power supply device 100 has strength withstanding impact of 55 J form the outside.
Each of the holder side walls 22 is lower than each of the case side walls 12a in height. In other words, the joining surfaces of the inner surface extending portion 22 and the inner surface extending portion 11c of the first case 11 are located inside the case side wall 12a of the second case 12. Thus, the inner surface extending portion 11c is guided or supported by an inner surface of the case side walls 12a, and the undersurface of the inner surface extending portion 11c is supported by the upper surface of the holder side wall 22, and then the contacting surfaces of the holder side walls 22 and the inner surface extending portion 11c are stabilized.
The extending length toward the second case 12 side of the outer surface extending portion 11b is shorter than that of the inner surface extending portion 11c. Thus, the region where the thickness of the first case 11 and the second case 12 is thin, is reduced, and then decrease of strength of the case side walls 12a is suppressed. As mentioned above, the inner surface extending portion 11c makes the region which is supported by the inner surface of the case side wall 12a large, and then the contacting surfaces to the holder side wall 22 can be stabilized.
As shown in the vertical sectional view of
Preferably, in the holder side wall 22 in the side surface of the longitudinal direction, a plurality of the holder side walls 22 are provided in spaced relationship with each other. Thus, the whole surface of the side surface of the secondary battery 1 is not covered with the holder side wall 22, but the secondary battery 1 is partially exposed, and then it absorbs manufacturing allowance of the secondary battery 1 or swollen deformation in the same way as above.
In the above example, the step-shaped structure at the joint boundary of the first case 11 and the second case 12 is continuously provided along the long direction, except for the side surface where the outer connecting terminals are provided, in other words, also at the side surface in the short direction in addition to the side surfaces in the longitudinal direction. As shown in
The circuit board 30 can include electric circuits such as a power conversion circuit for converting discharging current of the secondary battery 1, or a monitoring circuit for monitoring temperature of the secondary battery 1 or battery voltage. Here, in the example of
The circuit board 30 has the outer output terminal 31 and the power supplied terminal 32. In a state where the USB connector as the outer output terminal 31 is mounted directly on the circuit board 30, the circuit board 30 is fixed to the battery holder 20, and those are stored in the main body case 10, and then the outer output terminal 31 is exposed from the terminal window 14. Thus, the outer output terminal 31 is positioned, and the outer output terminal 31 is configured to be exposed from the predetermined terminal window 14 by assembling. In the same way, as the power supplied terminal 32 is mounted at the predetermined location on the circuit board 30, the power supplied terminal 32 is configured to be exposed from the predetermined terminal window 14 of the assembled main body case 10. The power switch 34 is mounted at a location corresponding to the switch portion 33 on the circuit board 30.
The circuit board 30 has the display portion 48 which shows operating states of the portable power supply device 100. Here, in the display portion 48, light emitting element shows a charging state or a discharging state of the secondary battery 1 with light colors or lighting patterns. As a light emitting element, a semiconductor light emitting element of LED which is low power consumption, a long life, and strong to mechanical impact can be suitably used. As shown in
Preferably, the side surface where the display portion 48 is provided, is a surface where the outer connecting terminals are exposed. Thus, when a user uses the portable power supply device and the outer connecting terminals for electrical connection, the user pays attention to the display portion 48 disposed in the vicinity of it. As the display portion 48 for showing the operating state is disposed at the surface to which the user necessarily pays attention, the display portion 48 can be easily confirmed by sight.
If necessary, the outer connecting terminal can have water proof, dust proof structure where a terminal cover 36 closes the terminal window 14. In the example shown in
The covering portion 60 has a cover side switch mark 66 which indicates that the switch portion 33 exists thereunder at a location corresponding to the switch portion 33 in a state where the covering portion 60 covers the first case 11 as shown in
Similarly, a switch mark can be provided also at the first case 11 side. In the example shown in
Preferably, the label side switch mark 72 is formed by embossing. Thus, the user can search the location of the switch through feeling of the finger tips, and the user can easily operate the switch in the dark or when it cannot be seen.
Preferably, the covering portion 60 has a positioning structure where the covering portion 60 does not cover the first case 11 in a reverse posture to the proper covering posture in the longitudinal direction. This example is shown in
Here, the positioning projection 64 and the above-mentioned finger catching portion 44 for detaching the covering portion 60 can be provide at the same short side of the first case 11. Thus, the covering portion 60 is detached from the first case 11, by the finger catching portion 44 at the engaging portion of the first case 11 and the covering portion 60 securely engaged by the positioning projection 64 for positioning, and then such detaching process can be smoothly carried out.
As mentioned above, this portable power supply device 100 is connected to the external electric equipment BD as shown in
As shown in
In contrast, the power transmission coil 51 is provided in the charging stand 50 side, and the power reception coil 40 can receive power from the power transmission coil 51 by the electromagnetic coupling of the power reception coil 40 and the power transmission coil 51, and the secondary battery can be charged by power conversion of this. It is necessary to set the portable power supply device 100 on the charging stand 50 so that the power transmission coil 51 of the charging stand 50 and the power reception coil 40 face to each other to carry out the non-contact charging. Therefore, a positioning system is provided between the portable power supply device 100 and the charging stand 50. As such a positioning system, in the example of a perspective view from the bottom side of
The shape of the cover projecting portion is not limited to the above embodiment 1, and its other shapes can be properly selected to prevent it from unintentionally coming off main body case. For example, in the portable power supply device 200 in a sectional view of
In the portable power supply device 300 in a sectional view of
The terminal cover is made as a separate part, or the terminal cover and the covering portion can be made as one part. For example, in the portable power supply device 400 in a sectional view of
In the above example, the portable power supply device is charged by line connection and non-contact method, but the portable power supply device of the present invention is not limited to the type having a function of non-contact charging. The example of the portable power supply device without the function of the non-contact charging is shown in an exploded perspective view of
Hereinafter, the portable power supply device 600 related to the embodiment 6 of the present invention is shown in
The first case 11 has a board shape of an upper portion 11u at the upper surface thereof, a flange portion 11t at the peripheral portion of the upper portion 11u, and an inner side wall 11s which is fitted to the second case 12.
The second case 12 has an inner peripheral wall 12c which is disposed at the inner sides of case side walls 12a of the second case 12, in spaced relationship with the case side walls 12a, and the inner side wall 11s is fitted between the case side walls 12a and the inner peripheral wall 12c. The inner peripheral wall 12c has U-shaped walls 12k in a plan view at the inner side of the second case 12, and the top end portions of the U-shaped walls 12k contact the inner side of the first case 11. The second case 12 has a step portion 12n inside the top end of the case side wall 12a which is engaged to the flange portion 11t, and has a board shape of the lower portion 12d at the lower surface thereof.
As shown in
Connecting plates 12r are integrally formed from the lower portion 12d between the case side wall 12a and inner peripheral wall 12c of the second case 12, and then strength is enlarged. The top end portion of the connecting plate 12 contact the lower end portion of the inner side wall 11s of the first case 11, and then strength against the impact from the outside is enlarged.
In a plan view of the second case 12, the second case 12 has a separating wall 12w which separates an area storing the secondary batteries 1 and an area storing the circuit board 30. In the area storing the secondary batteries 1, the inner peripheral wall 12c has the U-shaped walls 12k at the four locations so as to project toward the secondary batteries 1 (refer to
The top end portions of the U-shaped walls 12k contact the inner side of the first case 11, the side end portions of the U-shaped walls 12k contact the secondary batteries 1, and then the U-shaped walls 12k support the first case 11 and the secondary batteries as support walls.
As shown in
The top end portions of the U-shaped walls 12k contact the inner side of the upper portion 11u of the first case 11. Thus, strength is enlarged against impact in the vertical direction. Here, contacting the U-shaped walls 12k and the first case 11 also includes a case that a clearance between the top end portion of the U-shaped wall and the upper portion 11u of the first case exists at a normal time and they contact at impact applying.
In the area storing the secondary batteries 1, the lower secondary battery 1 is fixed to the lower portion 12d of the second case 12 by the two-faced adhesive tape, and the upper secondary battery 1 is fixed on the lower secondary battery 1 through spacers having adhesive layers on both surfaces thereof. A thick board-shaped cushion having adhesive layers on both surfaces thereof is disposed between the upper secondary battery 1 and the upper portion 11u of the first case 11, and then the secondary batteries 1 are fixed in the main body case 10, and the impact is buffered. Here, the secondary battery 1 is a thick rectangular board shape of a prismatic secondary battery in a plan view.
In the area storing the circuit board 30, the circuit board 30 is electrically connected to lead plates connected to the positive and negative electrodes of the secondary batteries 1, and the secondary batteries 1 are connected in parallel. One electrode is connected to the lead plate through a breaker. Here, the lead plate connected to the one electrode is insulated from the other electrode of the secondary batteries 1 through an insulating board.
An opening 11h is provided at the upper surface of the first case 11, and a button for pushing operation is disposed at the opening 11h. An electric switch is disposed at a location of the circuit board 30 just under the button. The button has an ON/OFF function of starting or stopping of discharging by pushing operation.
Openings are provided at the case side wall 12a in the short side of the second case 12. The outer output terminals 31 of two USB terminals and the power supplied terminal 32 of a micro-USB terminal set on the under surface of the circuit board 30 are provided at the openings. The circuit board 30 includes a charging circuit which uses power inputted from the power supplied terminal 32, and an output conversion circuit which converts output from the charged secondary batteries 1 into a standardized output thereunder. Heat generation parts which easily generate heat, are included in these circuits.
In this embodiment, these heat generation parts contact thermal conductive member of silicone resin, and a heat radiation plate 37 made of aluminum is disposed under the thermal conductive member, and then heat from the heat generation parts is radiated from the heat radiation plate 37. A base projection portion (a projection portion described as an example in
A submergence judging label is stuck on the lower surface in one of the USB terminals.
The first case 11 and the second case 12 are fixed by plural screws. A rating label of the portable power supply device 600 of this embodiment is stuck on the lower surface of the second case 12.
According to the above configuration, in addition to the case side wall, the holder side wall or the U-shaped wall can support the first case, and then the case side wall has the thickness without generating the sink of a resin when hardening a resin, and strength of the case side wall can be reinforced.
The power supply devices of the embodiments 1 to 6 are portable, but the stationary type can be used. Especially, when the thickness of the main body case is 1 mm to 3 mm, strength against impact from the outside can be enlarged by the configuration of the present disclosure.
The portable power supply device related to the present invention can be suitably used as an urgent charging device for a mobile phone, a smart phone, a tablet (slate) type PC, a portable music player, or a charging device for the urgent charging device.
Number | Date | Country | Kind |
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2013-223943 | Oct 2013 | JP | national |
2014-077961 | Apr 2014 | JP | national |
Filing Document | Filing Date | Country | Kind |
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PCT/JP2014/004593 | 9/8/2014 | WO | 00 |