Patent Application
20250158205
This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0059707, filed on May 16, 2022, and the entire contents of the Korean patent application are incorporated herein by reference.
The present disclosure relates to a battery module and a battery pack.
Types of secondary batteries include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, and nickel zinc batteries. An operating voltage of these unit secondary battery cells, that is, unit battery cells, is in the range of about 2.5 V to 4.2 V. Thus, when a higher output voltage is required, a battery pack is formed by connecting a plurality of battery cells in series. Further, a battery pack may be formed by connecting a plurality of battery cells in parallel according to a charging/discharging capacity required for the battery pack. Thus, the number of battery cells included in the battery pack may be variously set according to a required output voltage and a required charging/discharging capacity.
For example, when a battery pack is formed by connecting a plurality of battery cells in series or parallel, a battery module including the plurality of battery cells is first formed.
A common method of forming a battery pack includes using a plurality of battery modules 10 and adding other components.
Meanwhile, an abnormal phenomenon may occur in the battery module included in the battery pack during a charging or discharging process, and one example thereof is a swelling phenomenon. The swelling phenomenon is a phenomenon in which a battery cell expands due to gas generated inside the battery cell. The swelling phenomenon may first progress in each battery cell unit accommodated in the battery module, consequently affecting the battery module.
In particular, the swelling phenomenon may progress throughout a central portion of the battery module, that is, the entire module frame. Generally, a portion of the module frame of each battery module accommodated in a pack case is not a particularly fixed portion, and thus when the swelling phenomenon severely occurs, the swelling phenomenon may affect adjacent battery modules.
Thus, there is a need for a novel method capable of minimizing shape deformation of the battery module as much as possible even when the swelling phenomenon occurs in each battery module accommodated in the pack case.
Korean Patent Application Publication No. 10-2018-0113906
Thus, an aspect of the present disclosure is to provide a structure capable of reinforcing a side surface of a battery module.
Further, another aspect of the present disclosure is to suppress a swelling phenomenon of the battery module accommodated in a pack case.
Other purposes and advantages of the present disclosure may be understood with the following description and may be more clearly understood with aspects of the present disclosure. Further, it will be readily apparent that the purposes and advantages of the present disclosure may be implemented by units and combinations thereof described in the appended claims.
A battery module including a cell stack in which a plurality of cells are stacked includes a pair of reinforcement plates that are coupled to opposite sides of the battery module and support side surfaces of the battery module, wherein each of the pair of reinforcement plates includes a plurality of reinforcement ribs protruding and extending in a longitudinal direction of a reinforcement plate of the plurality of reinforcement plates.
The plurality of reinforcement ribs may be spaced a predetermined distance from each other in the longitudinal direction of the reinforcement plate.
The reinforcement plate may include a reinforcement groove having a recessed shape and provided between a pair of reinforcement ribs of the plurality of reinforcement ribs spaced apart from each other in the longitudinal direction of the reinforcement plate.
A shape of the reinforcement groove may correspond to a shape of a reinforcement rib of the reinforcement ribs such that the reinforcement rib is engaged with and inserted into the reinforcement groove.
The reinforcement rib and the reinforcement groove may be alternately formed in the longitudinal direction of the reinforcement plate.
The reinforcement rib may have at least one of a trapezoidal shape and a parabolic shape.
The plurality of reinforcement ribs may be spaced a predetermined distance from each other in a height direction of the reinforcement plate.
The plurality of reinforcement plates may include a first reinforcement plate provided on one side of the battery module, and a second reinforcement plate provided on another side of the battery module, and the plurality of reinforcement ribs included in the first reinforcement plate and the second reinforcement plate may be formed at a same height in the height direction of the plurality of reinforcement plates.
The reinforcement plate may include a through hole perforated to perpendicularly pass through a reinforcement rib of the plurality of reinforcement rib.
The reinforcement plate may further include a reinforcement bar extending perpendicularly through a reinforcement rib of the plurality of reinforcement ribs.
The reinforcement bar may include a reinforcement hole perforated so that a bolt perpendicularly passes through the reinforcement hole.
A battery pack includes the battery module, and a pack case including a module area in which the battery module is accommodated, wherein the plurality of reinforcement plates include a first reinforcement plate provided on one side of the battery module, and a second reinforcement plate provided on another side of the battery module, and the first reinforcement plate included in one battery module among a pair of battery modules arranged adjacent to the module area of the pack case is coupled to the second reinforcement plate of another battery module among the pair of battery modules.
The plurality of reinforcement ribs may be spaced a predetermined distance from each other in the longitudinal direction of the reinforcement plate, the reinforcement plate may include reinforcement grooves having a recessed shape and provided between a pair of reinforcement ribs among the plurality of reinforcement ribs spaced apart from each other in the longitudinal direction of the reinforcement plate, the reinforcement rib and the reinforcement groove may be alternately formed in the longitudinal direction of the reinforcement plate, and the reinforcement rib included in the first reinforcement plate of the one battery module among the pair of battery modules may be inserted into and engaged with the reinforcement groove included in the second reinforcement plate of the another battery module.
The reinforcement plate may further include a reinforcement bar extending perpendicularly through the reinforcement rib, the reinforcement bar may include a reinforcement hole perforated such that a bolt perpendicularly passes through the reinforcement hole, the pack case may include a coupling groove formed at a bottom of the module area to correspond to a position of the reinforcement hole, and the battery module may be coupled to the pack case by the bolt passing through the reinforcement hole and inserted into the coupling groove.
The reinforcement plate may include a through hole perforated to perpendicularly pass through the reinforcement rib, the pack case may include a coupling groove formed at a bottom of the module area to correspond to a position of the through hole, and the battery module may be coupled to the pack case by a bolt passing through the through hole and inserted into the coupling groove.
The pack case may include a base plate corresponding to a bottom portion, and a side wall perpendicularly coupled to an end of the base plate and extending along an edge of the base plate, the reinforcement plate may include an auxiliary coupling hole at opposite ends thereof, the auxiliary coupling hole being perforated such that the bolt passes through in a horizontal direction, the side wall may include an auxiliary coupling groove formed to correspond to a position of the auxiliary coupling hole of the battery module disposed in the module area, and the battery module may be coupled to the pack case by a bolt passing through the auxiliary coupling hole and inserted into the auxiliary coupling groove.
The reinforcement plate may include a semi-circular recess to accommodate one end of the bolt at a top side of the reinforcement plate.
The plurality of reinforcement ribs may be aligned and overlapped with each other in the height direction.
A battery may include a cell stack including a plurality of cells that are stacked; and a plurality of reinforcement plates coupled to sides of the cell stack and configured to support side surfaces of the plurality of battery cells, wherein each reinforcement plate includes at least one reinforcement rib protruding from each reinforcement plate in a direction away from the cell stack.
The battery may further include a bolt that extends in a height direction of the cell stack, and coupled to the at least one reinforcement rib.
According to the present disclosure, a swelling phenomenon of a battery module accommodated in a pack case may be suppressed.
Further, the present disclosure may improve the assembly efficiency of the pack case by removing, from the pack case, a separate side wall component that separates the battery module.
Hereinafter, exemplary aspects of the present disclosure will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and the appended claims should not be interpreted as being limited to usual or dictionary meanings and should be interpreted as meanings and concepts corresponding to the technical spirit of the present disclosure according to the principle that the inventor may properly define the concepts of the terms in order to describe his/her own disclosure in the best way.
Thus, since the aspects described in the present specification and configurations illustrated in the drawings are merely the most exemplary aspects of the present disclosure and do not represent all the technical spirit of the present disclosure, it should be understood that there may be various equivalents and variations that may replace the aspects and the configurations at the time of filing the present application.
Further, in description of the present disclosure, when it is determined that the detailed description of widely known related configurations or functions may obscure the gist of the present disclosure, the detailed description will be omitted.
Since the aspects of the present disclosure are provided to more completely describe the present disclosure to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer description. Thus, the size or ratio of each component does not entirely reflect the actual size or ratio.
The present disclosure relates to a battery module including a cell stack in which a plurality of cells are stacked and a battery pack including the same.
Hereinafter, the battery module and the battery pack of the present disclosure will be described according to each aspect with reference to the accompanying drawings.
As illustrated in (a) of
(Hereinafter, a basic structure of the battery module 100 according to the first aspect will be described using the form of (a) of
The reinforcement plate 130 serves to support a side surface of the battery module 100 and fix the battery module 100 to a pack case 200 when the battery module 100 is accommodated in the battery pack.
The reinforcement plates 130 may be coupled to the end plates having both ends coupled to the front and rear sides of the battery module 100 and support the battery module 100 while in contact with the entire side surface of the battery module 100. In this case, the reinforcement plate 130 may be screw-coupled and fixed to a side surface of the end plate 120 using a separate bolt B or the like and may be fixed with an adhesive.
As illustrated in
The reinforcement rib 131 has a shape extending in a longitudinal direction d of the reinforcement plate 130 and may have a trapezoidal shape having slopes formed on both sides thereof or a parabolic shape (not illustrated).
The reinforcement ribs 131 are spaced a predetermined distance from each other in the longitudinal direction d of the reinforcement plate 130. Further, the reinforcement plate 130 includes reinforcement grooves 132 formed by inclined surfaces of the reinforcement ribs 131 between the reinforcement ribs 131 arranged adjacent to each other in the longitudinal direction d. In this case, the reinforcement grooves 132 may have the same shape as the reinforcement ribs 131 so that the reinforcement ribs 131 may be engaged with and inserted into the reinforcement grooves 132. For example, when the reinforcement ribs 131 have a trapezoidal shape, the reinforcement grooves 132 also have a trapezoidal shape.
The reinforcement ribs 131 and the reinforcement grooves 132 may be alternately formed in the longitudinal direction d of the reinforcement plate 130.
Further, as illustrated in
As illustrated in
The reinforcement ribs 131 formed on the first reinforcement plate 130a and the second reinforcement plate 130b are formed at heights that are symmetrical to each other in the height direction of the reinforcement plate 130 but are formed at positions misaligned from each other in the longitudinal direction d of the reinforcement plate 130. For example, the reinforcement ribs 131 of the first reinforcement plate 130a and the reinforcement groove 132 of the second reinforcement plate 130b are positioned to be symmetrical to each other.
As illustrated in
The through holes 131h are formed at the same position in the reinforcement ribs 131. For example, the through holes 131h included in the reinforcement ribs 131 formed in the height direction of the reinforcement plate 130 at the same position in the longitudinal direction d of the reinforcement plate 130 are formed at positions corresponding to each other.
One bolt B may be inserted into each of the through holes 131h formed at the same position in the longitudinal direction d of the reinforcement plate 130, and the reinforcement plate 130 may be screw-coupled to the bolt B inserted into the through hole 131h.
The battery module 100 of the present disclosure may be primarily supported by the reinforcement plate 130 coupled to the side surface thereof, and the side surface of the battery module 100 may be triply supported by the reinforcement ribs 131 formed on the reinforcement plate 130 and the bolts B inserted into the through holes 131h of the reinforcement ribs 131.
As illustrated in
A bolt B may be inserted into the auxiliary coupling hole 134h, and the reinforcement plate 130 may be screw-coupled to the bolt B inserted into the auxiliary coupling hole 134h.
Referring to
Further, another bolt B is inserted into and coupled to, in the horizontal direction, the auxiliary coupling hole 134h formed at an end of the reinforcement plate 130.
The battery module 100 of the present disclosure may be fixed to the pack case 200 included in the battery pack by the bolts B inserted into and coupled to the through hole 131h and the auxiliary coupling hole 134h.
The battery pack according to the first aspect of the present disclosure includes the battery module 100 according to the first aspect of the present disclosure and the pack case 200 including a module area A in which the battery module 100 is accommodated.
The pack case 200 includes a base plate 210 corresponding to a bottom portion and a side wall 220 perpendicularly coupled to the base plate 210.
The side wall 220 includes a main side wall 221 perpendicularly coupled to the base plate 210 at an edge of the base plate 210 and a sub-side wall 222 perpendicularly coupled to the base plate 210 to cross the center of the base plate 210. Thus, the module area A included in the pack case 200 of the present disclosure may be roughly divided into two parts by the sub-side wall 222, and the battery modules 100 arranged in one module area A may be arranged side by side between the sub-side wall 222 and the main side wall 221 opposite to the sub-side wall 222 in a longitudinal direction d2 of the pack case 200.
A coupling groove 211h may be formed in a lower portion of the base plate 210 so that the bolt B may be inserted into and screw-coupled to the coupling groove 211h, and an auxiliary coupling groove 220h may be formed in the side wall 220 so that the bolt B may be inserted into and screw-coupled to the auxiliary coupling groove 220h.
Among the plurality of battery modules 100 accommodated in the module area A of the pack case 200, a pair of battery modules 100 arranged adjacent to each other are coupled to each other by reinforcement plates 130. In more detail, among the pair of battery modules 100 arranged adjacent to the module area A of the pack case 200, a first reinforcement plate 130a included in one battery module 100 is coupled to a second reinforcement plate 130b of the other battery module 100.
According to
In detail, one battery module 100 among the adjacent battery modules 100 is disposed such that the first reinforcement plate 130a provided on one side of the one battery module 100 faces the second reinforcement plate 130b provided on one side of the other battery module 100.
The pair of battery modules 100 arranged as illustrated in
As illustrated in (b) of
The plurality of battery modules 100 are accommodated in the module area A so that the through holes 131h formed in the reinforcement ribs 131 of the reinforcement plate 130 correspond to the coupling grooves 211h of the base plate 210 illustrated in
The battery module 100 may be accommodated in the module area A such that the auxiliary coupling hole 134h of the reinforcement plate 130 corresponds to the auxiliary coupling groove 220h of the side wall 220 illustrated in
The battery pack of the present disclosure may further include an upper cover (not illustrated) coupled to the pack case 200 to cover an upper portion of each battery module 100 accommodated in the module area A of the pack case 200.
Since the upper cover corresponds to widely-known technology, a more detailed description thereof will be omitted.
As illustrated in (a) of
(Hereinafter, a basic structure of the battery module 100 according to the second aspect will be described using the form of (a) of
The reinforcement plate 130 serves to support the side surface of the battery module 100 and to fix the battery module 100 to the pack case 200 when the battery module 100 is accommodated in the battery pack.
The reinforcement plates 130 may be coupled to the end plates having both ends coupled to the front and rear sides of the battery module 100 and support the battery module 100 while in contact with the entire side surface of the battery module 100. In this case, the reinforcement plate 130 may be screw-coupled and fixed to the side surface of the end plate 120 using a separate bolt B or the like and may be fixed with an adhesive.
As illustrated in
The reinforcement rib 131 has a shape extending in the longitudinal direction d of the reinforcement plate 130 and may have a trapezoidal shape having slopes formed on both side surfaces thereof or a parabolic shape (not illustrated).
The reinforcement ribs 131 are spaced a predetermined distance from each other in the longitudinal direction d of the reinforcement plate 130. Further, the reinforcement plate 130 includes reinforcement grooves 132 formed by inclined surfaces of the reinforcement ribs 131 between the reinforcement ribs 131 arranged adjacent to each other in the longitudinal direction d. In this case, the reinforcement grooves 132 may have the same shape as the reinforcement ribs 131 so that the reinforcement ribs 131 may be engaged with and inserted into the reinforcement grooves 132. For example, when the reinforcement ribs 131 have a trapezoidal shape, the reinforcement grooves 132 also have a trapezoidal shape.
The reinforcement ribs 131 and the reinforcement grooves 132 may be alternately formed in the longitudinal direction d of the reinforcement plate 130.
Further, as illustrated in
The reinforcement plates 130 coupled to both sides of the battery module 100 include a first reinforcement plate 130a provided on one side of the battery module 100 and a second reinforcement plate 130b provided on the other side of the battery module 100.
The reinforcement ribs 131 formed on the first reinforcement plate 130a and the second reinforcement plate 130b are formed at heights that are symmetrical to each other in the height direction of the reinforcement plate 130 but are formed at positions misaligned from each other in the longitudinal direction d of the reinforcement plate 130. For example, the reinforcement ribs 131 of the first reinforcement plate 130a and the reinforcement groove 132 of the second reinforcement plate 130b are positioned to be symmetrical to each other.
As illustrated in
The reinforcement bars 133 are spaced a predetermined distance from each other in the longitudinal direction d of the reinforcement plate 130 and may be formed at the same positions as the reinforcement ribs 131.
The reinforcement bar 133 includes a perpendicularly formed reinforcement hole 133h.
One bolt B may be inserted into the reinforcement hole 133h of the reinforcement bar 133, and the reinforcement plate 130 may be screw-coupled with the bolt B inserted into the reinforcement hole 133h.
The battery module 100 of the present disclosure may be primarily supported by the reinforcement plate 130 coupled to the side surface thereof and may be quadruply supported by the reinforcement ribs 131 formed on the reinforcement plate 130, the perpendicularly extending reinforcement bars 133, and the bolts B inserted into the reinforcement holes 133h of the reinforcement bars 133.
As illustrated in
The bolt B may be inserted into the auxiliary coupling hole 134h, and the reinforcement plate 130 may be screw-coupled to the bolt B inserted into the auxiliary coupling hole 134h.
Referring to
Further, another bolt B is inserted into and coupled to, in the horizontal direction, the auxiliary coupling hole 134h formed at the end of the reinforcement plate 130.
The battery module 100 of the present disclosure may be fixed to the pack case 200 included in the battery pack by the bolts B inserted into and coupled to the reinforcement hole 133h and the auxiliary coupling hole 134h.
The battery pack according to the second aspect of the present disclosure includes the battery module 100 according to the second aspect of the present disclosure and the pack case 200 including the module area A in which the battery module 100 is accommodated.
The pack case 200 according to
The pack case 200 includes a base plate 210 corresponding to the bottom portion and aside wall 220 perpendicularly coupled to the base plate 210.
The side wall 220 includes a main side wall 221 perpendicularly coupled to the base plate 210 at the edge of the base plate 210 and a sub-side wall 222 perpendicularly coupled to the base plate 210 to cross the center of the base plate 210. Thus, the module area A included in the pack case 200 of the present disclosure may be roughly divided into two parts by the sub-side wall 222, and the battery modules 100 arranged in the one module area A may be arranged side by side between the sub-side wall 222 and the main side wall 221 opposite to the sub-side wall 222 in the longitudinal direction d2 of the pack case.
A coupling groove 211h may be formed in the lower portion of the base plate 210 so that a bolt B may be inserted into and screw-coupled to the coupling groove 211h, and the auxiliary coupling groove 220h may be formed in the side wall 220 so that a bolt B may be inserted into and screw-coupled to the auxiliary coupling groove 220h.
Among the plurality of battery modules 100 accommodated in the module area A of the pack case 200, a pair of battery modules 100 arranged adjacent to each other are coupled to each other by the reinforcement plates 130. In more detail, among the pair of battery modules 100 arranged adjacent to the module area A of the pack case 200, the first reinforcement plate 130a included in one battery module 100 is coupled to the second reinforcement plate 130b of the other battery module 100.
In
According to
In detail, one battery module 100 among the adjacent battery modules 100 is disposed such that the first reinforcement plate 130a provided on one side of the one battery module 100 faces the second reinforcement plate 130b provided on one side of the other battery module 100.
The pair of battery modules 100 arranged as illustrated in (a) of
As illustrated in (b) of
The plurality of battery modules 100 are accommodated in the module area A so that the reinforcement holes 133h formed in the reinforcement bars 133 of the reinforcement plate 130 correspond to the coupling grooves 211h of the base plate 210 illustrated in
The battery module 100 may be accommodated in the module area A such that the auxiliary coupling hole 134h of the reinforcement plate 130 corresponds to the auxiliary coupling groove 220h of the side wall 220 illustrated in
The battery pack of the present disclosure may further include an upper cover (not illustrated) coupled to the pack case 200 to cover an upper portion of each battery module 100 accommodated in the module area A of the pack case 200.
Since the upper cover corresponds to widely-known technology, a more detailed description thereof will be omitted.
Hereinabove, the present disclosure has been described in more detail through the drawings, the aspects, and the like. However, since configurations described in the drawings or the aspects described in the present specification are merely aspects of the present disclosure and do not represent all the technical spirit of the present disclosure, it should be understood that there may be various equivalents and variations that may replace the configurations are present at the time of filing the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2022-0059707 | May 2022 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2023/006612 | 5/16/2023 | WO |
