Patent Application
20240243396
Embodiments of this application relate to the field of battery technologies, and in particular, to a battery and an electronic apparatus.
A battery is an apparatus that converts external energy into electric energy and that stores the electric energy in the battery, to supply power to an external device (for example, a portable electronic device) as needed. At present, batteries are widely used in electronic apparatuses such as mobile phones, tablets, notebook computers, and electric vehicles.
Currently, batteries are generally rectangular or circular, and correspondingly, electronic apparatuses are provided with rectangular or circular battery compartments to accommodate these batteries. However, in some electronic apparatuses, after other electronic components of the electronic apparatuses are appropriately arranged, the battery compartments may be L-shaped. Such a battery compartment includes a first chamber and a second chamber that are bent relative to each other. In this case, although the rectangular or circular batteries can be accommodated in the battery compartment by adjusting their size specifications, they can only be accommodated in either the first chamber or the second chamber, resulting in a waste of space in the battery compartment.
Embodiments of this application are intended to provide a battery and an electronic apparatus, so as to improve a current situation that an L-shaped battery compartment in an electronic apparatus cannot be well used for batteries and to enhance safety performance.
According to a first aspect, the following technical solution is used in some embodiments of this application to solve the technical problem. The solution specifically includes the following.
A battery is provided, including a housing, an electrode assembly, and tabs. The housing includes a first end wall, a second end wall, and a connecting wall portion. Both the first end wall and the second end wall are L-shaped and spaced apart in a thickness direction of the battery. The connecting wall portion extends from an edge of the first end wall toward the second end wall and encloses an L-shaped accommodating cavity, where the first end wall is provided as one end of the accommodating cavity, and the second end wall is provided as another end of the accommodating cavity. The connecting wall portion includes a plurality of wall portion units, and the plurality of wall portion units are arranged sequentially along a contour of the edge of the first end wall. The electrode assembly is L-shaped; the electrode assembly includes an anode plate, a cathode plate, and a separator; and the anode plate and the cathode plate are stacked alternately in the thickness direction, with an edge of the anode plate surrounding a projection of the cathode plate on the anode plate, where the separator is disposed between the anode plate and the cathode plate. The plurality of wall portion units include a preset wall portion unit, a side edge of the anode plate opposite to the preset wall portion unit is paced apart from the preset wall portion unit by a first distance; the side edge of the anode plate opposite to the preset wall portion unit extends beyond the cathode plate by a second distance, and a ratio of the first distance to the second distance corresponding to the preset wall portion unit ranges from 1/5 to 1/2, where the second distance ranges from 0.7 mm to 1.5 mm.
The entire housing of the battery according to some embodiments of this application is L-shaped. Therefore, when the housing is used for an electronic apparatus having an L-shaped battery compartment, two parts bent to each other in the battery according to some embodiments of this application can be filled in two chambers of the L-shaped battery compartment respectively, so as to better use the L-shaped battery compartment. In other words, the battery according to some embodiments of this application can improve the current situation that the L-shaped battery compartment in the electronic apparatus cannot be well used for batteries.
In some embodiments, the connecting wall portion includes a first wall portion unit, a second wall portion unit, a third wall portion unit, a fourth wall portion unit, a fifth wall portion unit, and a sixth wall portion unit. The first wall portion unit, the second wall portion unit, and the third wall portion unit extend along a first direction, the first wall portion unit, the second wall portion unit, and the third wall portion unit are spaced apart from each other sequentially in a second direction, a length of the third wall portion unit extending along the first direction is greater than lengths of the first wall portion unit and the second wall portion unit extending along the first direction, and the tabs extends out of the housing from the first wall portion unit, where both the first direction and the second direction are perpendicular to the thickness direction, and the first direction intersects the second direction. The fourth wall portion unit, the fifth wall portion unit, and the sixth wall portion unit extend along the second direction, the fourth wall portion unit, the fifth wall portion unit, and the sixth wall portion unit are spaced apart from each other sequentially in the first direction, and a length of the sixth wall portion unit in the second direction is greater than lengths of the fourth wall portion unit and the fifth wall portion unit extending along the second direction.
In a further improvement of the foregoing technical solution, at least one of the second wall portion unit, the third wall portion unit, the fourth wall portion unit, the fifth wall portion unit, or the sixth wall portion unit is the preset wall portion unit.
In some embodiments, the housing further includes a sealing portion extending from the connecting wall portion, where at least a part of the sealing portion is bent to extend toward the first end wall, and the sealing portion includes a second side wall unit and a third side wall unit. The second side wall unit extends from the second wall portion unit toward the first end wall. The third side wall unit extends from the third wall portion unit toward the first end wall.
In some embodiments, the anode plate has a second side edge opposite to the second wall portion unit, a distance between the second side edge and an outer surface of the second side wall unit is G2, the second side edge extends beyond the cathode plate by a distance D2, and 1/3≤G2/D2≤4/5, where 0.7 mm≤D2≤1.5 mm; and/or the anode plate has a third side edge opposite to the third wall portion unit, a distance between the third side edge and an outer surface of the third side wall unit is G3, the third side edge extends beyond the cathode plate by a distance D3, and 1/3≤G3/D3≤4/5, where 0.7 mm≤D3≤1.5 mm.
In some embodiments, the sealing portion further includes a fourth side wall unit and a sixth side wall unit. The fourth side wall unit extends from the fourth wall portion unit toward the first end wall; and the sixth side wall unit extends from the sixth wall portion unit toward the first end wall.
In some embodiments, the anode plate has a fourth side edge opposite to the fourth wall portion unit, a distance between the fourth side edge and an outer surface of the fourth side wall unit is G4, the fourth side edge extends beyond the cathode plate by a distance D4, and 1/3≤G4/D4≤4/5, where 0.7 mm≤D4≤1.5 mm; and/or the anode plate has a sixth side edge opposite to the sixth wall portion unit, a distance between the sixth side edge and an outer surface of the sixth side wall unit is G6, the sixth side edge extends beyond the cathode plate by a distance D6, and 1/3≤G6/D6≤4/5, where 0.7 mm≤D6≤1.5 mm.
In some embodiments, the sealing portion further includes a first curved side wall unit, the second side wall unit is connected to the fourth side wall unit through the first curved side wall unit, a radius R1 of the first curved side wall unit satisfies 0.85(G2+D2)≤R1≤1.0(G2+D2), and the second side edge is connected to the fourth side edge through a first curved portion; and/or the sealing portion further includes a second curved side wall unit, the third side wall unit is connected to the fourth side wall unit through the second curved side wall unit, a radius R2 of the second curved side wall unit satisfies 0.85(G3+D3)≤R2≤1.0(G3+D3), the anode plate has the third side edge opposite to the third wall portion unit, and the third side edge is connected to the fourth side edge through a second curved portion; and/or the sealing portion further includes a third curved side wall unit, the third side wall unit is connected to the sixth side wall unit through the third curved side wall unit, a radius R3 of the third curved side wall unit satisfies 0.85(G3+D3)≤R3≤1.0(G3+D3), and the third side edge is connected to the sixth side edge through a third curved portion.
In some embodiments, a first distance between the second side edge and the second wall portion unit is L2, and a thickness T of the connecting wall portion satisfies: 1/7≤T/L2≤1/3; and/or 1/25≤T/G2≤3/10.
In some embodiments, the part of the sealing portion bent to extend toward the first end wall is adhesively fixed to the connecting wall portion.
According to a second aspect, the following technical solution is further used in some embodiments of this application to solve the technical problem. The solution specifically includes:
One or more embodiments are used as examples for description by using corresponding accompanying drawings. These example descriptions impose no limitation on some embodiments. Elements with a same reference sign in the accompanying drawings represent similar elements. Unless otherwise stated, the figures in the accompanying drawings impose no limitation on a scale.
In which:
For ease of understanding this application, the following further describes this application in detail with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being “fixed to”, “fastened to”, or “mounted to” another element, it may be directly fixed to the another element, or there may be one or more elements therebetween. When an element is referred to as being “connected to” another element, it may be directly connected to the another element, or there may be one or more elements therebetween. The terms “perpendicular”, “horizontal”, “left”, “right”, “inside”, “outside”, and similar expressions used herein are merely for description purposes.
Unless otherwise defined, all technical and scientific terms used herein shall have the same meanings as commonly understood by persons skilled in the art to which this application belongs. The terms used in the specification of this application are for description of specific embodiments only without any intention to limit this application. The term “and/or” used herein includes any and all combinations of one or more associated items listed.
In addition, technical features involved in different embodiments of this application that are described below may be combined as long as they do not conflict with each other.
In this specification, “mounting” includes fixing or limiting an element or apparatus to a specific position or place by welding, screwing, clamping, bonding, or the like. The element or apparatus may stay still at the specific position or place, or may move within a limited range. After being fixed or limited to the specific position or place, the element or apparatus can be disassembled or cannot be disassembled. This is not limited in some embodiments of this application.
For the housing 100, specifically referring to
Specifically referring to
Preferably, in addition to the first to sixth wall portion units, the connecting wall portion 130 in this embodiment further includes a curved seventh wall portion unit 137. Specifically, the seventh wall portion unit 137 is connected between the second wall portion unit 132 and the fifth wall portion unit 135, and is recessed inward toward the accommodating cavity 101. The provision of the seventh wall portion unit 137 can facilitate positioning and installation of the battery 1 in an electronic apparatus. In addition, the seventh wall portion unit 137 is recessed inward to form an arc, which can avoid a right-angled transition between the second wall portion unit 132 and the fifth wall portion unit 135, thereby improving tensile performance of the battery 1 at that position to some extent. Specifically, in other embodiments, the second wall portion unit 132 and the fifth wall portion unit 135 may be connected through a right-angled transition. As compared with the manner of right-angled transition, in this embodiment, with the seventh wall portion unit 137 provided, the size and length of the connecting wall portion 130 at that position can be relatively increased without increasing the volume of the battery 1. Therefore, even if the battery 1 is subjected to a bending or twisting force surrounding the thickness direction Z shown in
Referring to
It should be noted that the connecting wall portion 130 does not keep extending along the thickness direction Z shown in the figure. Referring to
It should be understood that even if the housing 100 in this embodiment is formed by two composite sheets, in other embodiments, the housing 100 may alternatively be formed by a single composite sheet. For example, referring to
For the electrode assembly 200, still referring to
The anode plate 210 includes a first side edge 211, a second side edge 212, a third side edge 213, a fourth side edge 214, a fifth side edge 215, a sixth side edge 216, and a seventh side edge 217. These side edges correspond to the first wall portion unit 131, the second wall portion unit 132, the third wall portion unit 133, the fourth wall portion unit 134, the fifth wall portion unit 135, the sixth wall portion unit 136, and the seventh wall portion unit 137 sequentially. The seventh side edge 217 follows the seventh wall portion unit 137 and is recessed inward relative to the adjacent second side edge 212 and fifth side edge 215. In this embodiment, the seventh side edge 217 is recessed inward to form an arc. Similarly, the provision of the seventh side edge can improve tensile performance and bending resistance of the anode plate 210.
For the tabs 300, referring to
During transportation or use of batteries, it is inevitable for drops or collisions with other objects, and especially, in extreme cases, the entire electrode assembly 200 may crack into two parts along a certain direction under a sudden impact. These two parts may move away from each other and squeeze outward the side wall of the housing 100 under the remaining impact energy, and then puncture the housing 100; or cause the risk of short circuit due to the separator being punctured. Therefore, battery manufacturers typically perform impact tests, generally referred to as impact testing in the industry, on batteries before delivery. Generally, the impact test includes crack tests that simulate two environments where the electrode assembly 200 cracks into two parts in a first direction X and cracks into two parts in a second direction Y. Next, the test where the electrode assembly 200 cracks into two parts in a second direction Y is used as an example. The test method specifically includes the following steps.
For ease of description and understanding, a distance between any one of the first to sixth side edges and an outer surface of the opposite to wall portion unit is defined as a first distance Ln (n≥1). Any one of the first to sixth side edges extends beyond the cathode plate by a second distance Dn (n≥1). A distance between any one of the first to sixth side edges and an outer surface of the opposite to side wall unit is defined as a third distance Gn (n≥1). For the measurement manner of the first distance Ln, the second distance Dn, and the third distance Gn during the experiment, a CT image can be taken, measurement is performed in the CT image, and the measurement results are converted into actual dimensions.
First, the inventors tested different combinations of the first distance L2 and the second distance D2 to observe the test results. The first distance L2 is a distance between the second side edge 212 and an outer surface of the second wall portion unit 132, and the second side edge 212 extends beyond the cathode plate 220 by the second distance D2. To obtain more significant test results and expedite the testing process, the first distance L3 is kept consistent with the first distance L2, and the second distance D3 is kept consistent with the second distance D2. The first distance L3 is a distance between the third side edge 213 and an outer surface of the third wall portion unit 133, and the third side edge 213 extends beyond the cathode plate 220 by the second distance D3.
Table 1 shows influence of different combinations of the first distance L2 and the second distance D2 and different combinations of the first distance L3 and the second distance D3 on anti-collision performance of the battery. From the data in Table 1 and the test method of controlling variables, it can be learned that if the factors such as the second distance D2 and the second distance D3 are considered as constants for observation, that is, the factors such as the second distance D2 and the second distance D3 are considered as irrelevant variables, and the first distance L2 and the first distance L3 are considered as independent variables, and observed with reference to different groups, when a ratio of the first distance L2 to the second distance D2 ranges from 1/5 to 1/2, significantly more batteries 1 pass the test, which indicates better anti-collision performance of the battery 1. Specifically, when L2/D2<1/5, after the test round bar falls onto the battery 1, the electrode assembly 200 at least partially cracks into two parts opposite to along the second direction Y, and these two parts move away from each other along the second direction Y and puncture the second wall portion unit 132 and the third wall portion unit 133 in a short time. When L2/D2>1/2, after the test round bar falls onto the battery 1, the electrode assembly 200 at least partially cracks into two parts, and these two parts move away from each other along the second direction Y. Because L2 (or L3) is larger, the probability of puncturing the housing 100 is smaller as compared with the former. However, the time for these two parts to move away from each other to come into contact with the corresponding wall portion unit is long, so the anode plates 210 and the cathode plates 220 may locally wrinkle due to the relative movement in the process, and puncture the separator 230, resulting in short circuit of the battery 1. In comparison, when 1/5≤L2/D2≤1/2, the probabilities of the foregoing two cases are relatively low, so the battery 1 with such setting has better anti-collision performance.
If the ratio of the first distance L2 to the second distance D2 is considered as a constant for observation and the second distance D2 is considered as an independent variable, when the size of the second distance D2 ranges from 0.7 mm to 1.5 mm, significantly more batteries 1 pass the test, which indicates better anti-collision performance of the battery 1. Specifically, when D2<0.5 mm, there is a very short time difference between the anode plate 210 and the cathode plate 220 coming into contact with the second wall portion unit 132 (or the third wall portion unit 133). This means that the second wall portion unit 132 (or the third wall portion unit 133) is almost simultaneously subjected to the impact forces from the anode plate 210 and the cathode plate 220, resulting in a higher risk of being punctured. Therefore, fewer batteries pass the test. When D2>1.5 mm, there is a larger distance between the edges of the anode plate 210 and the cathode plate 220. In other words, before the cathode plate 220 comes into contact with the second wall portion unit 132 (or the third wall portion unit 133), the cathode plate 220 has a longer movement time, which increases the risk of short circuit caused by the anode plate 210 and the cathode plate 220 wrinkling and puncturing the separator 230. Therefore, fewer batteries 1 pass the test as well. In comparison, when 0.5 mm<D2<1.5 mm, there is a longer time difference between the anode plate 210 and the cathode plate 220 coming into contact with the second wall portion unit 132 (or the third wall portion unit 133). This can limit the time for the cathode plate 220 to move to the second wall portion unit 132 (or the third wall portion unit 133) to being shorter to some extent. Therefore, the battery 1 with such setting has better anti-collision performance.
In conclusion, when the second distance ranges from 0.7 mm to 1.5 mm and the ratio of the first distance to the second distance ranges from 1/5 to 1/2, the battery 1 has excellent anti-collision performance.
In this embodiment, parameters of the portion of the battery 1 shown in
In addition, the electrode assembly 200 also cracks into two parts along the first direction X shown in
In conclusion, in this application, the battery 1 can have a good anti-collision effect, provided that the connecting wall portion 130 includes at least one preset wall portion unit and the preset wall portion unit satisfies: a ratio of a first distance L′ to a second distance D′ corresponding to one preset wall portion unit ranges from 1/5 to 1/2, and the second distance ranges from 0.7 mm to 1.5 mm. In this application, the “preset wall portion unit” is one of the wall portion units in the connecting wall portion 130, and “the connecting wall portion including at least one preset wall portion unit” means that one or more of the wall portion units in the connecting wall portion 130 are the preset wall portion units. In this application, any one of the first wall portion unit 131, the second wall portion unit 132, the third wall portion unit 133, the fourth wall portion unit 134, the fifth wall portion unit 135, and the sixth wall portion unit 136 can be the preset wall portion unit. When all the first to sixth wall portion units are the preset wall portion units, the battery 1 has the best anti-collision effect. In this application, the “first distance” is the distance between the side edge of the anode plate opposite to the preset wall portion unit and the preset wall portion unit. For example, when the second wall portion unit is the preset wall portion unit, the first distance corresponding to the preset wall portion unit is the first distance L2. For another example, when the third wall portion unit 133 is the preset wall portion unit, the first distance corresponding to the preset wall portion unit is the first distance L3. In this application, the “second distance” is the distance by which the side edge of the anode plate opposite to the preset wall portion unit extends beyond the cathode plate. For example, when the second wall portion unit is the preset wall portion unit, the second distance corresponding to the preset wall portion unit is the second distance D2. For another example, when the third wall portion unit 133 is the preset wall portion unit, the second distance corresponding to the preset wall portion unit is the second distance D3. Finally, it should be noted that in this application, “the first distance and the second distance corresponding to one preset wall portion unit” refer to a first distance and a second distance corresponding to and matching a side edge of the anode plate 210 opposite to a preset wall portion unit. For example, when only the second wall portion unit 132 is the preset wall portion unit, the first distance and the second distance corresponding to the same preset wall portion unit are the first distance and the second distance corresponding to the second side edge, namely, the first distance L2 and the second distance D2. For another example, when both the second wall portion unit 132 and the third wall portion unit 133 are the preset wall portion units, the first distance and the second distance corresponding to the same preset wall portion unit are the matching first distance L2 and second distance D2 and the matching first distance L3 and second distance D3.
Preferably, to ensure that the first distance can provide an enough buffer space, a thickness T of the housing 100 at the connecting wall portion 130 and the first distance L′ satisfy 1/7≤T/L′≤1/3, where L′ may be any one of L1, L3, L4, L5, and L6. L1 is a distance between the first side edge 211 and an outer surface of the first wall portion unit 131, and L5 is a distance between the fifth side edge 215 and an outer surface of the fifth wall portion unit 135.
Within the height range covered by the sealing portion 140, the connecting wall portion 130 and the sealing portion 140 covering the connecting wall portion 130 together form the side wall of the battery 1. In other words, the sealing portion 140 also protects the electrode assembly 200. Therefore, the inventors tested different combinations of the third distance Gn (n≥2) and the second distance Dn, where the third distance Gn is between a side edge of the anode plate 210 and an outer surface of a corresponding side wall unit of the sealing portion 140. A distance between the second side edge 212 and an outer surface of the second side wall unit 142 is the third distance G2, a distance between the third side edge 213 and an outer surface of the third side wall unit 143 is the third distance G3, a distance between the fourth side edge 214 and an outer surface of the fourth side wall unit 144 is the third distance G4, a distance between the fifth side edge 215 and an outer surface of the fifth side wall unit 145 is the third distance G5, and a distance between the sixth side edge 216 and an outer surface of the sixth side wall unit 146 is the third distance G6.
Table 2 shows influence of different combinations of the third distance G2 and the second distance D2 and different combinations of the third distance G3 and the second distance D3 on anti-collision performance of the battery. From the data in Table 2 and the test method of controlling variables, it can be learned that if the second distance D2 and the second distance D3 are considered as constants for observation, that is, the factors such as the second distance D2 and the second distance D3 are considered as irrelevant variables, and the third distance G2 and the third distance G3 are considered as independent variables, and observed with reference to different groups, when a ratio of the third distance G2 to the second distance D2 ranges from 1/3 to 4/5, significantly more batteries 1 pass the test, which indicates better anti-collision performance of the battery 1. Specifically, when G2/D2<1/3, after the test round bar falls onto the battery 1, the electrode assembly 200 at least partially cracks into two parts opposite to each other along the second direction Y, and these two parts move away from each other along the second direction Y and puncture the second side wall unit 142 and the third side wall unit 143 in a short time. When G2/D2>4/5, after the test round bar falls onto the battery 1, the electrode assembly 200 at least partially cracks into two parts, and these two parts move away from each other along the second direction Y. Because G2 is larger, the probability of puncturing the housing 100 is smaller as compared with the former. However, the time for these two parts to move away from each other to come into contact with the corresponding side wall unit is long, so the anode plates 210 and the cathode plates 220 may locally wrinkle due to the relative movement in the process, and puncture the separator 230, resulting in short circuit of the battery 1. In comparison, when 1/3≤G2/D2≤4/5, the probabilities of the foregoing two cases are relatively low, so the battery 1 with such setting has better anti-collision performance.
If the ratio of the third distance G2 to the second distance D2 is considered as a constant for observation and the second distance D2 is considered as an independent variable, when the size of the second distance D2 ranges from 0.7 mm to 1.5 mm, significantly more batteries 1 pass the test, which indicates better anti-collision performance of the battery 1. Specifically, when D2<0.5 mm, there is a very short time difference between the anode plate 210 and the cathode plate 220 coming into contact with the second side wall unit 142 (or the third side wall unit 143). This means that the second side wall unit 142 (or the third side wall unit 143) is almost simultaneously subjected to the impact forces from the anode plate 210 and the cathode plate 220, resulting in a higher risk of being punctured. Therefore, fewer batteries pass the test. When D2>1.5 mm, there is a larger distance between the edges of the anode plate 210 and the cathode plate 220. In other words, before the cathode plate 220 comes into contact with the second side wall unit 142 (or the third side wall unit 143), the cathode plate 220 has a longer movement time, which increases the risk of short circuit caused by the anode plate 210 and the cathode plate 220 wrinkling and puncturing the separator 230. Therefore, fewer batteries 1 pass the test as well. In comparison, when 0.5 mm<D2<1.5 mm, compared with the case of D2<0.5 mm, there is a longer time difference between the anode plate 210 and the cathode plate 220 coming into contact with the second side wall unit 142 (or the third side wall unit 143); and compared with the case of D2>1.5 mm, the time for the cathode plate 220 to move to the second side wall unit 142 (or the third side wall unit 143) is shorter. Therefore, the battery 1 with 0.5 mm<D2<1.5 mm has better anti-collision performance.
In conclusion, when the second distance ranges from 0.7 mm to 1.5 mm and the ratio of the third distance to the second distance ranges from 1/3 to 4/5, the battery 1 has excellent anti-collision performance.
In this embodiment, parameters of the portion of the battery 1 shown in
In addition, the electrode assembly 200 also cracks into two parts along the first direction X shown in
Preferably, to ensure that the third distance can provide an enough buffer space, a thickness T of the housing 100 at the connecting wall portion 130 and the third distance G2 satisfy 1/25≤T/G2≤3/10. Similarly, such setting is also applicable to other portions of the housing 100. In other words, any one of G3, G4, G5, and G6 can be replaced with G2 in the relational expression.
Further, to avoid large stress at the corner of the battery 1 away from the tab 300 due to the sharp corner which makes the battery 1 occupy a large space and thus be not convenient to install, the sealing portion 140 further includes a first curved side wall unit 147, a second curved side wall unit 148, and a third curved side wall unit 149. Specifically, the second side wall unit 142 is connected to the fourth side wall unit 144 through the first curved side wall unit 147, the third side wall unit 143 is connected to the fourth side wall unit 144 through the second curved side wall unit 148, and the third side wall unit 143 is connected to the sixth side wall unit 146 through the third curved side wall unit 149. The arrangement of the first curved side wall unit 147, the second curved side wall unit 148, and the third curved side wall unit 149 allows for a reduction in the size of the battery 1 at these three corners, thereby reducing interference during installation. In addition, the stress on the curved structure is smaller than that on the sharp corner, so such arrangement can also improve local mechanical performance of the battery 1.
Still further, the second side edge 212 of the anode plate 210 is connected to the fourth side edge 214 through a first curved portion 218a, the third side edge 213 of the anode plate 210 is connected to the fourth side edge 214 through a second curved portion 218b, and the third side edge 213 of the anode plate 210 is connected to the sixth side edge 216 through the third curved portion 218c. The arrangement of the first to third curved side wall units reduces a gap between the anode plate 210 and the sealing portion 140, while the arrangement of the first curved portion 218a, the second curved portion 218b, and the third curved portion 218c is intended to increase this gap to some extent, thereby reducing the risk of the electrode assembly 200 being prone to puncture the connecting wall portion 130 and the sealing portion 140 when the battery 1 is impacted.
Next, based on the test method in the Table 2, the inventors further tested the variable of curved side wall unit introduced into each group of test. Table 3 shows influence of different combinations of the third distance G2 and the second distance D2, different combinations of the third distance G3 and the second distance D3, and fillet radii of the curved side wall units on anti-collision performance of the battery. In this test, in a same embodiment, the first curved side wall unit 147, the second curved side wall unit 148, and the third curved side wall unit 149 have a same fillet radius. For the measurement manner of the fillet radius, it should be noted that in this application, fillet radii of outer surfaces of the first to third curved side wall units 149 are measured using a three-dimensional contour measuring instrument. Certainly, in other embodiments of this application, other measuring tools such as an R gauge can also be used for measurement.
From the data in Table 3 and the test method of controlling variables, it can be learned that if the second distance D2, the second distance D3, the third distance G2, and the third distance G3 are considered as constants for observation, that is, the second distance s and the third distance s are considered as irrelevant variables, and the fillet radii R of the curved side wall units are considered as independent variables, and observed with reference to different groups, when a ratio of the fillet radius R to a sum of the third distance G2 and the second distance D2 ranges from 0.85 to 1.0, significantly more batteries 1 pass the test, which indicates better anti-collision performance of the battery 1.
It should be understood that even if the second distance D2 and the second distance D3 having the same size and the third distance G2 and the third distance G3 having the same size is used as an example for testing in this test, in other embodiments of this application, the second distance D2 may alternatively be different from the second distance D3, and the third distance G2 may alternatively be different from the third distance G3. For example, 0.8≤G2/G3<1 and 1<G2/G3≤1.2. In this case, the fillet radii of the curved side wall units correspondingly satisfy 0.85(G2+D2)≤R1≤1.0(G2+D2), 0.85(G3+D3)≤R2≤1.0(G3+D3), and 0.85(G3+D3)≤R3≤1.0(G3+D3). R1 represents a radius of an outer surface of the first curved side wall unit 147, R2 represents a radius of an outer surface of the second curved side wall unit 148, and R3 represents a radius of an outer surface of the third curved side wall unit 149.
In conclusion, the battery 1 according to some embodiments of this application includes a housing 100, an electrode assembly 200, and tabs 300. The housing 100 includes an L-shaped first end wall 110, an L-shaped second end wall 120, and a connecting wall portion 130 extending from the first end wall 110 to the second end wall 120. In other words, the entire housing 100 is L-shaped. Therefore, when the battery 1 is used for an electronic apparatus having an L-shaped battery compartment, two parts bent to each other in the battery 1 can be filled in two chambers of the L-shaped battery compartment respectively, so as to better use the L-shaped battery compartment. In other words, the battery according to some embodiments of this application can improve the current situation that the L-shaped battery compartment in the electronic apparatus cannot be well used for batteries.
In addition, the connecting wall portion 130 includes at least one preset wall portion unit, and a ratio of a first distance to a second distance corresponding to the preset wall portion unit ranges from 1/5 to 1/2, where the second distance ranges from 0.7 mm to 1.5 mm. Such setting is conducive to improving anti-collision performance of the battery 1.
Based on the same inventive concept, another embodiment of this application further provides an electronic apparatus 2. Specifically referring to
The battery in the electronic apparatus 2 can improve the current situation that the L-shaped battery compartment in the electronic apparatus cannot be well used for batteries.
Finally, it should be noted that the foregoing embodiments are merely intended to describe the technical solutions of this application, and are not intended to limit this application. Under the idea of this application, the foregoing embodiments or the technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of this application as described above, which, for the sake of brevity, are not provided in detail. Although this application is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some technical features therein, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of some embodiments of this application.
This application is a continuation application of PCT application No. PCT/CN2021/135125, filed on Dec. 2, 2021, the content of which is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2021/135125 | Dec 2021 | WO |
| Child | 18622406 | US |
