CN221009055U - Battery case, battery, and electronic device - Google Patents

Abstract

The utility model provides a battery shell, a battery and an electronic device. The membrane shell limits a first concave cavity and a second concave cavity for accommodating the bare cell, and the membrane shell is provided with a spacing part for separating the first concave cavity and the second concave cavity, and the partition plate is used for separating the first bare cell and the second bare cell. The first height a, the second height b, the third height d, and the first width c satisfy: a+b+c is not less than 2d. The height of the bottom edge is larger than or equal to the sum of the thicknesses of the packaged bare cells, so that the first side wall, the second side wall and the third side wall can be connected to form a closed bottom edge after being stretched along the second direction. After the battery shell is folded, only two sides adjacent to the bottom edge are required to be respectively packaged, and one side of the bottom edge is not required to be packaged again. According to the technical scheme, on one hand, the packaging interference to the bottom edge during packaging is effectively avoided, and on the other hand, the bottom edge packaging structure is eliminated, so that the energy density of the battery cell in the length direction can be greatly improved.

Description

Battery case, battery, and electronic device

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a battery case, a battery, and an electronic device.

Background

To improve battery performance, lithium ion internal string batteries typically have two or more bare cells packaged in the same package. In the prior art, when a battery with two bare cells is manufactured, the two bare cells are firstly placed in a sub-packaging bag with independent pits respectively, then a baffle is arranged on one side of an opening of one sub-packaging bag, then the opening of the other sub-packaging bag faces to the baffle to be buckled on the sub-packaging bag, and finally the other three sides of the two sub-packaging bags outside the lead-out lugs are packaged, so that the baffle can completely separate the two bare cells.

In packaging, in order to ensure that the two battery cells are completely separated by the separator, the side edges of the two adjacent sides of the tab need to be packaged once respectively, and the bottom edge opposite to the tab needs to be packaged once. Because both sides limit and base have the cross region in the corner, so can not only cause the electric core base cross region to be repeatedly packaged when packaging, cause the encapsulation to interfere, reduce battery performance, still can be because of the banding installation space of reserving the base in electric core length direction, and make electric core loss great energy density in length direction.

Disclosure of utility model

The utility model mainly aims to provide a battery shell which can solve the technical problem of cell bottom edge encapsulation interference.

In order to achieve the above object, the present utility model proposes a battery case including a membrane case and a separator. The membrane shell limits out first cavity and the second cavity that have the same opening direction, first cavity is used for holding first naked electric core, the second cavity is used for holding the second naked electric core, first cavity and second cavity set up along first direction interval, the membrane shell has the spacer part that separates first cavity and second cavity, the spacer part includes first lateral wall, second lateral wall and third lateral wall, along first direction, first lateral wall and second lateral wall opposite arrangement, first lateral wall is used for prescribing a limit to first cavity, the second lateral wall is used for prescribing a limit to the second cavity, third lateral wall one side is connected with first lateral wall, the opposite side is connected with the second lateral wall. The separator is configured to be capable of being disposed on a side of the membrane housing where the bare cell is accommodated, so that the separator can be connected with the spacer, and the separator is used for separating the first bare cell and the second bare cell. The direction perpendicular to the third side wall is taken as a second direction, along the second direction, the first side wall has a first height a, the second side wall has a second height b, and the bare cell has a third height d. Along the first direction, the third sidewall has a first width c, and the first height a, the second height b, the third height d, and the first width c satisfy: a+b+c is not less than 2d.

In some embodiments, the film shell includes a first side shell and a second side shell, the first side shell and the spacer together define a first cavity, the second side shell and the spacer together define a second cavity, and the depths of the first cavity and the second cavity are equal to the heights of the bare cells correspondingly accommodated by the first cavity and the second cavity along the second direction.

In some embodiments, the first height a and the second height b satisfy: a=b.

In some embodiments, the first height a and the first width c satisfy: a is less than or equal to c.

In some embodiments, the second height b and the first width c satisfy: b is less than or equal to c.

In some embodiments, in the first direction, the separator and the spacer have a maximum connection width e, the first width c and the maximum connection width e satisfying: c is more than or equal to e.

In some embodiments, in the second direction, the baffle has a fourth height f, and in the first direction, the first cavity has a maximum opening length g, the fourth height f and the maximum opening length g satisfying: f-g is more than or equal to 0mm and less than or equal to 5mm.

In some embodiments, the separator includes a first plate, a second plate, and a third plate disposed opposite to the first plate along the second direction, one side of the third plate is connected to the first plate, the other side is connected to the second plate, the first plate is configured to be connected to the third side wall, and the second plate is configured to cover the first cavity.

In some embodiments, the second plate has a fifth height h in the second direction, and the distance between the third plate and the second sidewall in the first direction is a sixth height i, wherein the fifth height h and the sixth height i satisfy: a+c-i-h=d.

In some embodiments, the second plate has a fifth height h in the second direction, and the distance between the third plate and the second sidewall in the first direction is a sixth height i, wherein the fifth height h and the sixth height i satisfy: b+h+i=d.

In some embodiments, the second plate has a fifth height h in the second direction, wherein the first height a, the second height b, and the third height c and the fifth height h satisfy: h < a < b < c.

In some embodiments, the sixth height i satisfies: i is more than or equal to 0 and less than c. In some embodiments, the battery case is sequentially arranged with 2n sets of first and second cavities connected by a spacer in the first direction, wherein the spacer between the second cavity of the n-th set of cavities and the n+1-th set of cavities is provided with a spacer.

A second aspect of the present application provides a battery comprising a first bare cell, a second bare cell, and a battery case of any of the above embodiments. The membrane shell is folded by taking a cross line of the partition plate and the third side wall as an axis, so that the membrane shell and the partition plate are limited to form a first accommodating cavity and a second accommodating cavity which are oppositely arranged along a second direction, the first bare cell is arranged in the first accommodating cavity in a sealing manner, the second bare cell is arranged in the second accommodating cavity in a sealing manner, and the second bare cell is connected with the first bare cell in series.

A third aspect of the application provides an electronic device comprising a battery according to any of the embodiments described above.

Compared with the prior art, the utility model has the beneficial effects that:

In the technical scheme of the utility model, the battery shell comprises a membrane shell and a separator. The membrane shell defines a first cavity and a second cavity, the membrane shell has a spacer portion, and the separator can be disposed in the spacer portion. In the process of manufacturing the battery shell, the membrane shell is firstly limited to form a first concave cavity and a second concave cavity, then the partition plate is connected to the spacing part between the first concave cavity and the second concave cavity, and finally the manufactured battery shell can be used for packaging a bare cell. When the battery shell is used for packaging the battery core, the first bare battery core and the second bare battery core are firstly placed in the first concave cavity and the second concave cavity respectively, then the membrane shell is folded by taking the intersection line of the partition plate and the third side wall as an axis, so that the first concave cavity and the second concave cavity are respectively arranged on two sides of the partition plate along the second direction, the partition plate is used for enabling the first bare battery core and the second bare battery core to be arranged in the first concave cavity and the second concave cavity in a separated mode, the partition part stretches along the second direction to form the bottom edge of the battery, two sides adjacent to the bottom edge are finally packaged, and one end opposite to the bottom edge is used for leading out the tab. Since the first height a, the second height b, the third height d, and the first width c satisfy: the height of the bottom edge is larger than or equal to the sum of the thicknesses of the packaged bare cells, and the first side wall, the second side wall and the third side wall after being folded can be guaranteed to be connected to form a closed bottom edge after being stretched along the second direction. According to the technical scheme, the packaging interference of the bottom edge during packaging is effectively avoided, and the bottom edge packaging structure is eliminated, so that the energy density of the battery core in the length direction can be greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a battery case according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of the portion I of FIG. 1;

Fig. 3 is a schematic structural diagram of a bare cell placed in a battery case according to an embodiment of the present utility model;

Fig. 4 is a schematic view of a battery according to another embodiment of the present utility model.

Reference numerals illustrate:

A battery case 100;

A membrane shell 110; a first cavity 111; a second cavity 112; a spacer 113; a first sidewall 1131; a second sidewall 1132; a third sidewall 1133; a first height a; a second height b, a first width c; a third height d; a first side case 114; a second side case 115; maximum connection width e; a fourth height f; maximum opening length g;

A partition plate 120; a first plate body 121; a second plate 122; a third plate 123;

a battery 200;

A first die 210; a second die 220.

A first direction X;

A second direction Y.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

With the development of technology, lithium ion battery technology is continuously improved, and people have higher demands on the charging speed and energy density of the battery. To improve battery performance, an inner string battery typically packages two or more bare cells in the same package. In the packaging process of the lithium battery, two or more bare cells are firstly placed in a sub-packaging bag with independent pits respectively, then a baffle is arranged on one side of an opening of one sub-packaging bag, then the opening of the other sub-packaging bag faces to the baffle to be buckled on the sub-packaging bag, and finally the other three sides of the two sub-packaging bags, which are led out of the tab, are packaged, so that the baffle can completely separate the two bare cells.

In packaging, in order to ensure that the two battery cells are completely separated by the separator, the two sides adjacent to the tab need to be packaged once, and the bottom edge opposite to the tab needs to be packaged once. In the prior art, the packaging is to press two sub-packaging bags along the side edges of the bare cell, and as the two side edges and the bottom edge of the packaging bag are provided with the crossing areas at the corners, on one hand, the side edges are packaged for once to the crossing areas, and the bottom edge is packaged for twice to the crossing areas, so that the repeated packaging of the crossing areas causes packaging interference. In the prior art, on one hand, the battery performance is reduced due to packaging interference, and on the other hand, the packaging structure of the bottom plate occupies a certain volume of the battery, so that the battery core can lose larger energy density in the length direction.

In order to solve the above problems, as shown in fig. 1 to 3, the present application proposes a battery case 100, which battery case 100 includes a membrane case 110, and a separator 120.

As shown in fig. 1, the film case 110 defines a first cavity 111 having the same opening direction for accommodating the first bare cell 210 and a second cavity 112 for accommodating the second bare cell 220. The first cavity 111 and the second cavity 112 are spaced apart along the first direction X. The membrane shell 110 has a spacer 113 separating the first cavity 111 and the second cavity 112. It should be noted that, in some embodiments, the membrane shell 110 may be a single wall plate, and the first cavity 111 and the second cavity 112 may be obtained by punching the membrane shell 110 with a mold. The membrane shell 110 may also have a plurality of panels, and the first cavity 111 and the second cavity 112 may be enclosed by the panels. Similarly, the first cavity 111 and the second cavity 112 may be obtained by punching a pit with a mold, and the other cavity may be formed by splicing wall plates, which will not be described herein.

As shown in fig. 2, the spacer 113 includes a first sidewall 1131, a second sidewall 1132, and a third sidewall 1133. Along the first direction X, the first side wall 1131 is disposed opposite to the second side wall 1132, the first side wall 1131 is configured to define the first cavity 111, the second side wall 1132 is configured to define the second cavity 112, and the third side wall 1133 is connected to the first side wall 1131 on one side and the second side wall 1132 on the other side. It should be noted that, in some embodiments, the spacer 113 may be integrally formed on the membrane shell 110, specifically, in the manufacturing process of the battery shell 100, the first cavity 111 and the second cavity 112 may be formed by punching the membrane shell 110, and in the punching process, a gap is left between the first cavity 111 and the second cavity 112, and after the punching, the spacer 113 may be formed in the gap. In some embodiments, the membrane housing 110 may also include a first side housing 114 and a second side housing 115, where the first side housing 114 is connected to a side of the first side wall 1131 facing away from the second side wall 1132, such that the first side wall 1131 and the first side housing 114 define the first cavity 111, and another portion of the second side housing 115 is connected to a side of the second side wall 1132 facing away from the first side wall 1131, such that the second side wall 1132 and the second side housing 115 together define the second cavity 112, which is not limited herein.

As shown in fig. 1, the spacer 120 is configured to be able to be disposed on a side of the film case 110 where the bare cells are accommodated, so that the spacer 120 can be connected to the spacer 113, and the spacer 120 is used to separate the first bare cell 210 and the second bare cell 220. It is understood that the spacer 120 may be attached to the spacer 113 by heat staking, welding, or the like. In different embodiments, the shape of the first cavity 111 and the second cavity 112 may be different. The partition board 120 may cover the first cavity 111, so as to separate the first cavity 111 from the second cavity 112, and the partition board 120 is used to separate the first die 210 from the second die 220, which are disposed in the first cavity 111 and the second cavity 112.

As shown in fig. 2, the direction perpendicular to the third sidewall 1133 is taken as a second direction Y, along the second direction Y, the first sidewall 1131 has a first height a, the second sidewall 1132 has a second height b, and the bare cell has a third height d. Along the first direction X, the third sidewall 1133 has a first width c, and the first height a, the second height b, the third height d, and the first width c satisfy: a+b+c is not less than 2d. For convenience of description, taking the example of pit punching of the single film shell 110 along the vertical direction to form the first cavity 111 and the second cavity 112, the first direction X is parallel to the horizontal plane and the second cavity 112 is pointed by the first cavity 111, the third side wall 1133 is parallel to the horizontal plane, and the direction perpendicular to the horizontal plane is the second direction Y. The sum of the first height a, the second height b and the third height c is greater than or equal to the sum of the thicknesses of the two bare cells, so that the spacer 113 can form the bottom edge of the battery 200 when the bare cells are packaged in the battery case 100. The spacer 113 is continuous, thereby effectively avoiding packaging of the bottom edge of the battery 200. It should be noted that, the third height d is the thickness of the battery cell, the specific thickness of the battery cell may be d1, d2, etc., and d1 and d2 may be equal or unequal, and it is also within the protection scope of the present application to package bare cells with different thicknesses through the battery case 100 of the present application.

In the aspect of the present utility model, the battery case 100 includes a membrane case 110 and a separator 120. The membrane shell 110 defines a first cavity 111 and a second cavity 112, the membrane shell 110 having a spacer 113, and the diaphragm 120 being capable of being disposed in the spacer 113. In the process of manufacturing the battery case 100, the film case 110 defines the first cavity 111 and the second cavity 112, then the separator 120 is connected to the spacer 113 between the first cavity 111 and the second cavity 112, and finally the manufactured battery case 100 can be used for packaging the bare cell. When the battery case 100 of the present utility model is used for packaging a battery core, the first bare cell 210 and the second bare cell 220 are firstly placed in the first cavity 111 and the second cavity 112 respectively, then the film case 110 is folded around the intersection line of the partition board 120 and the third side wall 1133 as an axis, so that the first cavity 111 and the second cavity 112 are respectively arranged at two sides of the partition board 120 along the second direction Y, the spacer 113 is stretched along the second direction Y to form the bottom edge of the battery 200, and finally two sides adjacent to the bottom edge are packaged, and one end opposite to the bottom edge is used for leading out a tab. Since the first height a, the second height b, the third height d, and the first width c satisfy: the height of the bottom edge is larger than or equal to the sum of the thicknesses of the packaged bare cells, and the first side wall 1131, the second side wall 1132 and the third side wall 1133 can be connected to form a closed bottom edge after being stretched along the second direction Y after being folded. The third side wall 1133 has a first portion and a second portion distributed on two sides of the partition 120, the first portion is disposed on a side close to the first cavity 111, the second portion is disposed on a side close to the second cavity 112, after being folded, the first portion and the first side wall 1131 together form a bottom edge corresponding to the first cavity 111, and the second portion and the second side wall 1132 together form a bottom edge corresponding to the second cavity 112. According to the battery shell 100, after being folded, only two sides adjacent to the bottom edge are required to be packaged respectively, and one side of the bottom edge does not need to be packaged again.

In the present application, the first direction X and the second direction Y are defined by the membrane housing 110 being unfolded, and the first direction X and the second direction Y do not change with the folding of the membrane housing 110.

In some embodiments, to reduce the gap between the film shell 110 and the die during packaging, while ensuring that the die can be stably confined in the cavity during packaging, in various embodiments, the film shell 110 on the side away from the spacer 113 may be flush with the die height, and in the second direction Y, the maximum depth of the first cavity 111 and the second cavity 112 formed by the film shell 110 is equal to the die height. It is to be noted that the approximate equality within the allowable error range is included in the meaning equivalent to the present application. As shown in fig. 3, in the present embodiment, the film shell 110 includes a first side shell 114 and a second side shell 115, the first side shell 114 and the spacer 113 together define a first cavity 111, the second side shell 115 and the spacer 113 together define a second cavity 112, and along the second direction Y, the depths of the first cavity 111 and the second cavity 112 are equal to the height of the bare cell, so that the film shell 110 forming the first cavity 111 and the second cavity 112 during packaging can be closely attached to the bare cell, and the bare cell can be stably limited in the cavity.

In some embodiments, to facilitate the snap-fit of the first bare cell 210 and the second bare cell 220 on two sides of the partition 120, the heights of the first sidewall 1131 and the second sidewall 1132 may be the same. In the battery case 100, the spacer 113 is provided between the first cavity 111 and the second cavity 112, the first side wall 1131 is used to define the first cavity 111, and the second side wall 1132 is used to define the second cavity 112. Because the membrane shell 110 is folded about the intersection line of the partition board 120 and the third side wall 1133 as an axis during manufacturing the battery 200, the first cavity 111 and the second cavity 112 are disposed opposite to the two sides of the partition board 120 along the direction parallel to the thickness of the partition board 120, so that the partition board 120 can separate the first cavity 111 and the second cavity 112, and further the first bare cell 210 in the first cavity 111 and the second bare cell 220 in the second cavity 112 are ensured to be isolated from each other. It will be appreciated that the alignment of the first and second cavities 111, 112 facilitates the sealed packaging of the first and second die 210, 220 when folded. To facilitate alignment of the first die 210 and the second die 220, the difference in height in the second direction Y between the first side wall 1131 for limiting the first cavity 111 and the second side wall 1132 for limiting the second cavity 112 may be kept within a reasonable range. In the present embodiment, the first height a and the second height b satisfy: a=b. That is, as shown in fig. 2, in the present embodiment, the first height a of the first side wall 1131 and the second height b of the second side wall 1132 are kept identical along the second direction Y. It can be appreciated that when the difference between the first height a and the second height b is smaller, on one hand, the depth of the first cavity 111 and the second cavity 112 on the side close to the spacer 113 can be kept consistent, which is further helpful for the folding alignment of the bare cell, and on the other hand, the third side wall 1133 is connected to the first side wall 1131 and the second side wall 1132 with smaller height difference, which can enable the third side wall 1133 to be closer to the horizontal plane, which is further beneficial for connecting the partition 120 to the third side wall 1133.

In some embodiments, to facilitate coupling the spacer 120 to the third sidewall 1133, the width of the third sidewall 1133 along the first direction X should be no less than the height of the first sidewall 1131 and the second sidewall 1132 along the second direction Y. In the battery case 100, the first side wall 1131, the second side wall 1132 and the third side wall 1133 together form the partition portion 113, when the battery case 100 is used for wrapping and mounting a bare cell, the film case 110 is folded along the boundary line between the third side wall 1133 and the separator 120 as an axis, and the folded partition portion 113 has the first side wall 1131, the third side wall 1133 and the second side wall 1132 arranged in sequence along the second direction Y to form the bottom edge of the battery 200. In order to make the folded film shell 110 more fit the bare cell, the length of the bottom edge should be kept within a certain range. That is, in order to ensure the pit depth for placing the bare cell and the spacer 120 can be connected to the third sidewall 1133 within the limited length range of the bottom edge, the first height a of the first sidewall 1131, the second height b of the second sidewall 1132, and the third width c of the third sidewall 1133 all need to meet certain requirements. As shown in fig. 3, in the present embodiment, the first height a and the first width c satisfy: a is less than or equal to c. Likewise, the second height b and the first width c may also satisfy: b is less than or equal to c. It should be noted that, in some embodiments, the first height a and the second height b may be kept equal, that is, the first height a, the second height b, and the first width c may satisfy: a=b.ltoreq.c. Since the first side wall 1131 and the second side wall 1132 are respectively used for defining the first cavity 111 and the second cavity 112, the third side wall 1133 is connected with the partition board 120, after the bare cell is packaged in the battery case 100, the isolation of the first bare cell 210 and the second bare cell 220 near one side of the isolation part is achieved by the connection of the partition board 120 and the isolation part, and in order to ensure stable separation of the first bare cell 210 and the second bare cell 220, the stable connection of the partition board 120 and the third side wall 1133 is particularly important, so that in this embodiment, the values of the first height a and the second height b are smaller than the value of the first width c, while ensuring that the first side wall 1131 and the second side wall 1132 can limit the first cavity 111 and the second cavity 112, the third side wall 1133 can have enough first width c to realize stable connection of the partition board 120 and the third side wall 1133.

In some embodiments, to improve the stability of the connection between the spacer 120 and the third sidewall 1133, the width of the third sidewall 1133 along the first direction X should be not less than the maximum package contact width when the spacer 120 and the third sidewall 1133 are actually packaged. As shown in fig. 2, in the present embodiment, along the first direction X, the partition 120 and the spacer 113 have a maximum connection width e, and the first width c and the maximum connection width e satisfy: c is more than or equal to e. In a specific packaging process, the spacer 120 may be connected to the third sidewall 1133 by heating or gluing, etc., and in different connection processes, the required width of the third sidewall 1133 when the spacer 120 is packaged on the third sidewall 1133 is different, and the spacer 120 and the third sidewall 1133 are packaged along the first direction X, where the first width c is greater than the maximum connection width e, so as to facilitate the stability of the connection of the spacer 120 to the third sidewall 1133. In some embodiments, the first width c may be twice the maximum connection width e, without limitation. According to the application, the partition board 120 is connected to the third side wall 1133, so that the bottom edge is prevented from being packaged in the process of packaging the battery 200, the problem of cell bottom packaging interference is effectively solved, and the partition board 120 is connected to the third side wall 1133, so that the outer side of the bottom edge does not need to reserve a mounting space for a packaging folded edge when the battery 200 is packaged, the bottom space of the battery 200 is effectively saved, and the energy density of the cell is further effectively improved.

In some embodiments, to ensure that the separator 120 can cover the first cavity 111 and the second cavity 112, while avoiding the first separator 120 and the second separator 120 from affecting the lead-out of the tab of the battery 200, the length of the separator 120 should be controlled within a certain range along the second direction Y. As shown in fig. 1, in the present embodiment, the partition 120 has a fourth height f along the second direction Y, and the first cavity 111 has a maximum opening length g along the first direction X, and the fourth height f and the maximum opening length g satisfy: f-g is more than or equal to 0mm and less than or equal to 5mm. That is, when the battery case 100 is used for packaging the battery 200, the membrane case 110 is folded about the boundary between the third side wall 1133 and the separator 120, and the separator 120 is disposed in the first direction X after the folding. The fourth height f in the second direction Y before folding is not less than the maximum opening length g of the first cavity 111, which enables the partition 120 to cover the first cavity 111 in the first direction X. Specifically, the difference between the fourth height f and the maximum opening length g may be 0mm, 0.05mm, 1mm or 5mm, where the difference between the fourth height f and the maximum opening length g is between 0mm and 5mm, so that on one hand, the separator 120 can cover the first cavity 111, and on the other hand, the influence of the separator 120 on the tab led out from the battery 200 can be avoided. It is understood that the fourth height herein refers to the height of the partition 120 after being fully unfolded in the second direction.

In some embodiments, one side of the partition 120 is connected to the third sidewall 1133, and the shape of the plate portion of the partition 120 may be different according to different requirements. In various embodiments, the plate body portion of the partition 120 may be a regular flat plate, or may be other irregular spacers. As shown in fig. 3, in the present embodiment, the partition 120 includes a first plate 121, a second plate 122, and a third plate 123, where the first plate 121 and the second plate 122 are disposed opposite to each other along the second direction Y, one side of the third plate 123 is connected to the first plate 121, the other side is connected to the second plate 122, the first plate 121 is connected to the third side wall 1133, and the second plate 122 is used to cover the first cavity 111. It can be understood that the first plate 121 being parallel to the second plate 122 means that the thickness direction of the first plate 121 is parallel to the thickness direction of the third sidewall 1133, and the first plate 121 being parallel to the second plate 122 can increase the contact area between the partition 120 and the third sidewall 1133, so as to improve the stability of the partition 120 on the third sidewall 1133. In different embodiments, the second plate 122 and the third plate 123 may be disposed differently, and specifically, the second side plate and the third side plate may be disposed vertically along the second direction Y, and the second side plate and the third side plate may also be disposed alternately, which is not limited herein.

As shown in fig. 3 and fig. 4, in some embodiments, to improve the convenience of assembling the battery case 100 and improve the stability of sealing the bare cell of the battery case 100, the first plate 121, the second plate 122 and the third plate 123 may be manufactured by punching the partition 120 into a pit, and then the first plate 121 is connected to the third side wall 1133, and the second plate has a fifth height h along the second direction, and the distance between the third plate and the second side wall is a sixth height i along the first direction, where the fifth height h and the sixth height i satisfy: a+c-i-h=d. That is, the folded film shell 110 is disposed along the same straight line as the first side wall 1131, the second side wall 1132 and the third side wall 1133, that is, the first cavity 111 and the second cavity 112 are disposed opposite to each other along the second direction Y, and the sum of the heights of the first side wall 1131 and the third side wall 1133 subtracts the distance between the third plate 123 and the second side wall 1132, and subtracts the height of the third plate 123, so as to form the depth of the first cavity 111 along the second direction Y, that is, the third height d. Also, in some embodiments, the fifth height h and the sixth height i satisfy: b+h+i=d. That is, the height of the second side wall 1132, the distance between the third board 123 and the second side wall 1132, and the height of the third board 123 together form the depth of the second cavity 112 for placing the second bare cell 220, so that the steps of alignment and calibration during packaging can be reduced, which is helpful for improving the production quality and the production efficiency _.

As shown in fig. 3 and 4, in some embodiments, to facilitate forming the separator 120, facilitate heat sealing the separator 120 to the third sidewall 1133, and improve yield, the second plate body has a fifth height h along the second direction, where the first height a, the second height b, and the third height c and the fifth height h satisfy: h < a < b < c. The greater width of the third sidewall 1133 helps to enhance the attachment of the diaphragm 120 to the membrane housing 110.

As shown in fig. 3 and 4, in some embodiments, the distance between the third plate 123 and the second side 1132 may be arbitrary, and the distance between the third plate 123 and the second side 1132 may be different according to different requirements. In the present embodiment, the sixth height i satisfies: i is more than or equal to 0mm and less than c. Specifically, in some embodiments, the sixth height i may also be 0mm, that is, the third plate 123 may be spaced from the second side 1132 by 0mm. In some embodiments, to increase the capacity of the battery case 100, the battery case 100 may be provided with a plurality of cavities. To facilitate packaging of the battery 200 and to increase the energy density of the battery 200, the battery case 100 is provided with an even number of cavities accommodating bare cells. In the present embodiment, the battery case 100 is sequentially arranged with 2n sets of the first cavities 111 and the second cavities 112 connected by the spacers 113 along the first direction X, wherein the spacers 113 between the second cavities 112 of the nth set of cavities and the n+1th set of cavities are provided with the spacers 120. For ease of understanding, the battery case 100 is described herein as having two sets of cavities along the first direction X, and the second set of cavities is a third cavity and a fourth cavity along the first direction X for ease of distinction. Before packaging, the four bare cells are respectively placed in the first concave cavity 111, the second concave cavity 112, the third concave cavity and the fourth concave cavity, isolation parts are arranged between the concave cavities, and the isolation parts between the second concave cavity 112 and the third concave cavity are provided with a baffle plate 120. When the battery case 100 is folded, the membrane case 110 is turned over by taking the intersection line of the partition plate 120 and the membrane case 110 as an axis, so that the first cavity 111 and the fourth cavity are relatively arranged on two sides of the partition plate 120 along the second direction Y, the second cavity 112 and the third cavity are relatively arranged on two sides of the partition plate 120 along the second direction Y, and then the partition plate 120 can separate multiple groups of bare cells at the same time.

As shown in fig. 4, the second aspect of the present application further provides a battery 200, which includes a first bare cell 210, a second bare cell 220, and the battery case 100 of any of the above embodiments. The membrane shell 110 is folded about the intersection line of the partition board 120 and the third side wall 1133, so that the membrane shell 110 and the partition board 120 define a first accommodating cavity and a second accommodating cavity which are oppositely arranged along the second direction Y, the first bare cell 210 is sealed and arranged in the first accommodating cavity, the second bare cell 220 is sealed and arranged in the second accommodating cavity, and the second bare cell 220 is connected with the first bare cell 210 in series. The battery 200 of the present embodiment has the same technical effects as the battery case 100 described above thanks to the improvement of the battery case 100 described above, and will not be described again here.

A third aspect of the application also provides an electronic device (not shown) comprising a battery 200 according to any of the embodiments described above. The electronic device of the present embodiment has the same technical effects as the battery case 100 described above thanks to the improvement of the battery case 100 described above, and will not be described here again.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is included in the embodiment of the present utility model, the directional indication is merely used to explain a relative positional relationship, a movement condition, and the like between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or", "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B ", including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (13)

1. A battery case, comprising:

The film shell is used for limiting a first cavity and a second cavity with the same opening direction, the first cavity is used for containing a first bare cell, the second cavity is used for containing a second bare cell, the first cavity and the second cavity are arranged at intervals along the first direction, the film shell is provided with a spacing part for separating the first cavity and the second cavity, the spacing part comprises a first side wall, a second side wall and a third side wall, the first side wall is opposite to the second side wall along the first direction, the first side wall is used for limiting the first cavity, the second side wall is used for limiting the second cavity, one side of the third side wall is connected with the first side wall, and the other side of the third side wall is connected with the second side wall; and

A separator configured to be able to be provided on a side of the membrane housing where the bare cell is accommodated, the separator being able to be connected to the spacer, the separator being configured to separate the first bare cell and the second bare cell;

The first side wall is provided with a first height a, the second side wall is provided with a second height b, and the bare cell is provided with a third height d along a second direction by taking a direction perpendicular to the third side wall as a second direction; along the first direction, the third sidewall has a first width c, and the first height a, the second height b, the third height d, and the first width c satisfy: a+b+c is not less than 2d.

2. The battery case according to claim 1, wherein,

The membrane shell comprises a first side shell and a second side shell, the first side shell and the spacing part limit the first concave cavity together, the second side shell and the spacing part limit the second concave cavity together, and the depths of the first concave cavity and the second concave cavity are equal to the heights of bare cells correspondingly accommodated in the first concave cavity and the second concave cavity along the second direction.

3. The battery case according to claim 1, wherein,

The first height a and the second height b satisfy: a=b.

4. The battery case according to claim 1, wherein,

The first height a and the first width c satisfy: a is less than or equal to c;

and/or the number of the groups of groups,

The second height b and the first width c satisfy: b is less than or equal to c.

5. The battery case according to claim 1, wherein,

In a first direction, the partition plate and the partition part have a maximum connection width e, and the first width c and the maximum connection width e satisfy: c is more than or equal to e.

6. The battery case according to claim 1, wherein,

In the second direction, the separator has a fourth height f; in the first direction, the first cavity has a maximum opening length g, and the fourth height f and the maximum opening length g satisfy: f-g is more than or equal to 0mm and less than or equal to 5mm.

7. The battery case according to claim 1, wherein,

The baffle includes first plate body, second plate body and third plate body, follows the second direction, first plate body with the second plate body sets up relatively, third plate body one side is connected first plate body, the opposite side is connected the second plate body, first plate body be used for with the third lateral wall is connected, the second plate body is used for covering first cavity.

8. The battery housing according to claim 7, wherein,

The second plate body is provided with a fifth height h along the second direction, and the distance between the third plate body and the second side wall is a sixth height i along the first direction;

wherein,

The fifth height h and the sixth height i satisfy: a+c-i-h=d;

and/or the number of the groups of groups,

The fifth height h and the sixth height i satisfy: b+h+i=d.

9. The battery housing according to claim 7, wherein,

The second plate body is provided with a fifth height h along the second direction; wherein the first height a, the second height b, and the third height c and the fifth height h satisfy: h < a < b < c.

10. The battery housing according to claim 8, wherein,

The sixth height i satisfies: i is more than or equal to 0 and less than c.

11. The battery case according to claim 1, wherein,

Along a first direction, the battery shell is sequentially provided with 2n groups of first concave cavities and second concave cavities which are connected through the spacing parts, wherein the spacing parts between the second concave cavities of the nth group of concave cavities and the n+1th group of concave cavities are provided with the partition plates.

12. A battery, comprising:

a first bare cell;

A second bare cell; and

The battery case of any one of claims 1-11;

The membrane shell can be folded by taking the intersection line of the partition plate and the third side wall as an axis, so that the membrane shell and the partition plate limit a first accommodating cavity and a second accommodating cavity which are oppositely arranged along the second direction, the first bare cell is sealed to be arranged in the first accommodating cavity, the second bare cell is sealed to be arranged in the second accommodating cavity, and the second bare cell is connected with the first bare cell in series.

13. An electronic device, comprising:

The battery of claim 12.