CN218896790U - Battery cell assembly, battery pack and power device - Google Patents

Abstract

The utility model discloses a battery core assembly, a battery pack and a power device, wherein the battery core assembly comprises a plurality of battery cores and a first connecting piece, the battery cores are arranged along a first direction and comprise a shell and two second poles, the shell is provided with two side walls which are oppositely arranged along the first direction, the area of the two side walls is larger than that of the rest side walls of the shell, the first pole is arranged on the first side wall, the second pole is arranged on the second side wall and faces the first pole, in the two adjacent battery cores, the first pole of one battery core faces the second pole of the other battery core, the first connecting piece is arranged between the first pole and the second pole of the two adjacent battery cores and is electrically connected with the first pole and the second pole respectively, and the first connecting piece can generate corresponding deformation when the battery cores deform. The battery cell component provided by the embodiment of the utility model not only can reduce the size of the battery cell component in the height direction, but also can slow down the extrusion degree of the battery cell, thereby prolonging the service life of the battery cell and improving the use safety of the battery cell.

Description

Battery cell assembly, battery pack and power device

Technical Field

The utility model relates to the technical field of power equipment, in particular to a battery cell assembly, a battery pack and a power device.

Background

The battery cell assembly is mainly formed by sequentially arranging and connecting a plurality of battery cells.

In the prior art, in order to facilitate connection between a plurality of electric cores, a pole of the electric core is generally selected to be arranged on the upper surface of the electric core, and the poles of the electric cores are connected through a bus bar to form an electric core assembly.

However, the arrangement of the pole on the upper surface of the battery cell results in a larger occupied space of the battery cell in the height direction, and meanwhile, the arrangement of the bus bars also increases the production cost and weight of the battery cell assembly and reduces the assembly efficiency of the battery cell assembly.

Disclosure of Invention

In view of the above, the present utility model aims to provide a battery cell assembly which not only occupies a small space in the height direction, but also has low production cost, light weight, long service life and high safety.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a cell assembly, comprising: a plurality of cells arranged along a first direction, the cells comprising: a housing having a first sidewall and a second sidewall disposed opposite to each other in the first direction, an area of the first sidewall and the second sidewall being larger than an area of the remaining sidewalls of the housing; the first pole is arranged on the first side wall; the second pole is arranged on the second side wall and is opposite to the first pole, and in two adjacent electric cores, the first pole of one electric core is opposite to the second pole of the other electric core; the first connecting piece is arranged between the first pole and the second pole of two adjacent electric cores and is electrically connected with the first pole and the second pole respectively; the first connecting piece can generate corresponding deformation when the battery cell is deformed.

According to the battery cell assembly provided by the embodiment of the utility model, the first pole and the second pole are respectively arranged on the first side wall and the second side wall with larger areas, so that the arrangement positions of the first pole and the second pole are adjusted, the increase of the height of the battery cell due to the arrangement of the first pole and the second pole is avoided, the occupation space of the battery cell in the height direction is further reduced, the subsequent arrangement of the battery cell assembly is facilitated, meanwhile, the first connecting piece which can generate corresponding deformation when the battery cell is deformed is arranged between the adjacent first pole and the second pole, the first connecting piece can realize the electric connection between the battery cells, the arrangement of a busbar is omitted, the cost of the battery cell assembly is reduced, the weight of the battery cell assembly is realized, and meanwhile, when the battery cell is expanded and extrudes the first connecting piece, the first connecting piece can be prevented from obstructing the deformation or extrusion of the battery cell, namely the battery cell can be ensured to effectively expand and deform and not be extruded by the first connecting piece, so that the service life of the battery cell is prolonged, and the service safety of the battery cell is improved. That is, the battery cell assembly of the application has small occupied space in the height direction, low production cost, light weight, high safety and long service life.

In addition, the cell assembly according to the above embodiment of the present utility model may further have the following additional technical features:

according to some embodiments of the utility model, the first connector forms a flexible connector; the flexible connecting piece comprises a flexible piece and a conductive piece, wherein the conductive piece is wrapped on the periphery of the flexible piece and is respectively connected with the first pole and the second pole.

Optionally, the flexible member is formed as one of a sponge member, a foam member, or a rubber member; and/or the conductive member is formed as a conductive cloth.

Optionally, the flexible connection unit further comprises a flame retardant member, and the flame retardant member is wrapped around the periphery of the conductive member.

Optionally, the first connecting piece is bonded with the first pole and the second pole respectively.

Optionally, the first and second posts are disposed adjacent an edge of the housing.

Optionally, the battery cell assembly further comprises a glue blocking piece; the first pole and the second pole are arranged adjacent to the upper edge of the shell, the glue blocking piece is arranged between two adjacent electric cores and adjacent to the lower edge of the shell, and the glue blocking piece can generate corresponding deformation when the electric cores deform.

According to some embodiments of the utility model, the cell further comprises an explosion-proof valve; the shell is provided with a top wall and a bottom wall which are oppositely arranged in a second direction, the explosion-proof valve is arranged on the top wall or the bottom wall, the area of the explosion-proof valve is not smaller than half of the area of the top wall or the bottom wall, and the second direction is mutually perpendicular to the first direction.

A second object of the present utility model is to provide a battery pack.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a battery pack, comprising: the box body is internally provided with a containing cavity; the plurality of groups of the battery cell assemblies are arranged in the accommodating cavity and are arranged along a third direction, the first direction and the second direction are mutually perpendicular, and the battery cell assemblies are the battery cell assemblies; the second connecting piece is arranged in two adjacent groups of the battery cell assemblies, one side of one group of the battery cell assemblies exposes the first pole of the battery cell, one side of the other group of the battery cell assemblies exposes the second pole of the battery cell, and the second connecting piece is connected with the first pole and the second pole.

According to the battery pack provided by the embodiment of the utility model, the occupied space of the battery pack in the height direction is effectively reduced by adopting the battery core assembly, and meanwhile, the battery pack has the advantages of low production cost, light weight, high safety, long service life and the like.

A third object of the present utility model is to provide a power plant.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a power device comprises the battery pack.

According to the power device provided by the embodiment of the utility model, the battery pack is adopted, so that the safety of the power device is ensured, the production cost of the power device is reduced, and the space utilization rate of the power device in the height direction is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural view of a cell assembly according to some embodiments of the present utility model.

Fig. 2 is a schematic diagram of a cell according to some embodiments of the utility model.

Fig. 3 is a schematic view of another angle of the cell according to some embodiments of the utility model.

Fig. 4 is a top view of a cell assembly according to some embodiments of the utility model.

Fig. 5 is a partial enlarged view of the region i in fig. 4.

Fig. 6 is an exploded view of a battery pack according to some embodiments of the present utility model.

Fig. 7 is a partial enlarged view of area ii in fig. 6.

Fig. 8 is a schematic structural view of a battery pack according to some embodiments of the present utility model.

Fig. 9 is a schematic diagram of a connection of multiple cell assemblies according to some embodiments of the utility model.

Fig. 10 is a top view of a plurality of cell assemblies according to some embodiments of the utility model connected.

Reference numerals:

1000. a battery pack;

100. a cell assembly;

110. a battery cell;

111. a housing; 1111. a first sidewall; 1112. a second sidewall; 1113. a top wall; 112. a first pole; 113. A second post; 114. An explosion-proof valve;

120. a first connector; 130. A glue blocking piece;

200. a case; 210. A receiving chamber;

300. a second connector;

400. a cooling assembly; 410. a heat conductive member; 420. and a cooling member.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The present utility model will be described in detail below with reference to fig. 1 to 10 in conjunction with the embodiments.

Referring to fig. 1 to 5, a cell assembly 100 according to an embodiment of the present utility model includes: a plurality of cells 110 and a first connector 120.

As shown in fig. 1, the plurality of battery cells 110 are arranged along the first direction. It should be noted that, the first direction is understood to be the front-back direction shown in fig. 1, that is, the plurality of cells 110 in the cell assembly 100 are sequentially arranged along the front-back direction, and this arrangement facilitates the subsequent connection of the plurality of cells 110, and the cooperation of the plurality of cells 110 may also facilitate the capacity increase of the cell assembly 100.

As shown in fig. 2 and 3, the battery cell 110 includes a housing 111, a first post 112 and a second post 113, the housing 111 has a first sidewall 1111 and a second sidewall 1112, the first sidewall 1111 and the second sidewall 1112 are disposed opposite to each other in a first direction, the area of the first sidewall 1111 and the second sidewall 1112 is larger than the area of the rest of the sidewalls of the housing 111, the first post 112 is disposed on the first sidewall 1111, the second post 113 is disposed on the second sidewall 1112 and faces the first post 112, and in two adjacent battery cells 110, the first post 112 of one battery cell 110 faces the second post 113 of the other battery cell 110. That is, the first pole 112 and the second pole 113 are both disposed on the housing 111 and located on the side wall of the larger area of the housing 111, and the first pole 112 and the second pole 113 on the same electric core 110 are disposed opposite to each other, so as to ensure that when two adjacent electric cores 110 are sequentially arranged in the first direction, the first pole 112 of one electric core 110 can be opposite to the second pole 113 of the other electric core 110, so that the two adjacent electric cores 110 are connected in series, thereby reducing the connection difficulty between the plurality of electric cores 110, that is, improving the assembly efficiency of the electric core assembly 100.

As shown in fig. 4 and 5, the first connection member 120 is disposed between the first and second poles 112 and 113 of the adjacent two cells 110 and is electrically connected to the first and second poles 112 and 113, respectively. Thereby enabling electrical connection between adjacent two of the cells 110, i.e., enabling series connection of adjacent two of the cells 110.

That is, the serial connection between two adjacent cells 110 is realized through the first connecting member 120, so that the arrangement of the bus bars is omitted, thereby reducing the production cost of the cell assembly 100 and realizing the light weight of the cell assembly 100.

The first connecting member 120 can be deformed when the battery cell 110 is deformed. That is, the first connecting member 120 itself may be deformed by external force.

As can be seen from the above structure, the arrangement positions of the first pole 112 and the second pole 113 are adjusted, and the first pole 112 and the second pole 113 are respectively arranged on the first sidewall 1111 and the second sidewall 1112 of the housing 111 with larger areas, so that the increase in the height of the battery cell 110 caused by the arrangement of the first pole 112 and the second pole 113 can be effectively avoided, that is, the height of the battery cell 110 is reduced, so that the occupation space of the battery cell 110 in the height direction can be reduced, the volume of the battery cell assembly 100 is reduced, the subsequent arrangement of the battery cell assembly 100 is facilitated, and the arrangement difficulty of the battery cell assembly 100 is reduced.

It should be noted that, in the prior art, in order to provide a space for the expansion deformation of the battery cells 110, when the battery cells 110 are arranged in the first direction, the battery cells 110 need to be arranged at intervals, that is, a certain gap is formed between the battery cells 110, and the first pole 112 and the second pole 113 are arranged in the gap, so that the occupied space of the battery cell assembly 100 in the height direction is reduced, and the occupied space of the battery cell assembly 100 in the length direction is not increased, so that the occupied space of the battery cell assembly 100 is small. Here, the longitudinal direction is understood to be the front-rear direction shown in fig. 1.

In addition, this application sets up the first connecting piece 120 and realizes the electrical connection between two adjacent electric cores 110 between two adjacent first utmost point posts 112 and the second utmost point post 113, on the one hand can save the setting of busbar to reduce the manufacturing cost of electric core subassembly 100 and realize the lightweight of electric core subassembly 100, on the other hand still can avoid first utmost point post 112 and the direct contact of second utmost point post 113, thereby can avoid first utmost point post 112 and second utmost point post 113 to produce mutual friction, in order to prolong the life of first utmost point post 112 and second utmost point post 113.

Meanwhile, the first connecting piece 120 is set to be capable of generating corresponding deformation when the battery cell 110 is deformed, and the expansion phenomenon can occur in the working process due to the battery cell 110, so that when the battery cell 110 is expanded and the first connecting piece 120 is extruded, the extruded first connecting piece 120 can be effectively deformed, namely the first connecting piece 120 can be deformed along with the expansion condition of the battery cell 110, so that the extrusion degree of the first connecting piece 120 to the battery cell 110 is slowed down, the damage to the battery cell 110 caused by the first connecting piece 120 is avoided, the service life of the battery cell 110 is prolonged, and the use safety of the battery cell 110 is improved.

It can be appreciated that, compared to the prior art, the cell assembly 100 of the present application does not occupy too much space in the length direction and occupies little space in the height direction in the first aspect; in the second aspect, the arrangement of the bus bars can be omitted, so that the battery cell assembly 100 has the advantages of low production cost, light weight and the like; in the third aspect, the first pole 112 and the second pole 113 can be prevented from being directly contacted, so as to prolong the service life of the battery cell 110; in the fourth aspect, the electrical connection member connecting the first pole 112 and the second pole 113 can deform to enable the battery cell 110 to deform normally, and meanwhile, extrusion of the battery cell 110 can be avoided, so as to improve the use safety of the battery cell 110 and further prolong the service life of the battery cell 110.

Alternatively, one of the first and second posts 112 and 113 forms a positive post, and the other forms a negative post. Thus, when the first connecting member 120 connects the first pole 112 and the second pole 113 of the adjacent two cells 110, the adjacent two cells 110 are connected in series.

In some embodiments of the utility model, the first connector 120 forms a flexible connector. To ensure that when the battery cell 110 deforms, the first connecting piece 120 can effectively deform accordingly, so that the battery cell 110 can deform normally and extrusion of the battery cell 110 by the first connecting piece 120 is avoided, thereby prolonging the service life of the battery cell 110 and improving the use safety of the battery cell 110.

Optionally, the flexible connection member includes a flexible member and a conductive member, and the conductive member is wrapped around the periphery of the flexible member and connected to the first pole 112 and the second pole 113 respectively. The flexible member enables the first connecting member 120 to have deformation capability, and the conductive member enables the first connecting member 120 to effectively realize electrical connection between the first pole 112 and the second pole 113, so that the first connecting member 120 of the present application can not only realize electrical connection between two adjacent cells 110, but also generate corresponding deformation according to the cells 110.

Alternatively, the flexible member is formed as one of a sponge member, a foam member, or a rubber member. That is, the flexible member may be made of sponge, foam or rubber, so that the flexible member has a deformation capability, and thus the first connecting member 120 has a deformation capability, so as to avoid the first connecting member 120 from pressing the battery cell 110.

Optionally, the conductive member is formed as a conductive cloth. The conductive cloth can ensure that the conductive piece can effectively realize the electrical connection between the first pole 112 and the second pole 113, and simultaneously can enable the shape of the conductive piece to follow the corresponding deformation of the flexible piece, namely, the first connecting piece 120 can effectively follow the deformation of the battery cell 110 to generate corresponding deformation.

Optionally, the flexible connecting piece further comprises a flame retardant piece, and the flame retardant piece is wrapped on the periphery of the conductive piece. It will be appreciated that the outer circumference of the first connection member 120 is provided with a flame retardant member, which can prevent heat from being transferred to one of the battery cells 110 through the first connection member 120 when the heat loss occurs in the other battery cell 110, thereby achieving a reduction in the degree of the heat loss of the battery cell assembly 100.

In some examples, the outer periphery of the conductive member is coated with a layer of flame retardant to effect the placement of the flame retardant member on the exterior of the conductive member.

Optionally, the first connecting member 120 is bonded to the first pole 112 and the second pole 113, respectively. To achieve a fixed connection between the first connecting piece 120 and the first pole 112 and between the first connecting piece and the second pole 113, so as to facilitate the electrical connection between two adjacent cells 110 by using the first connecting piece 120.

In addition, the bonding fit can further improve the connection strength between the first connecting piece 120 and the first pole 112, and the second pole 113, so as to ensure that the first connecting piece 120 can be stably connected between the first pole 112 and the second pole 113.

Alternatively, as shown in conjunction with fig. 2 and 3, the first pole 112 and the second pole 113 are disposed adjacent to the edges of the housing 111. That is, the first pole 112 is disposed near the edge of the first sidewall 1111, and the second pole 113 is disposed near the edge of the second sidewall 1112, so that the first pole 112 and the second pole 113 can effectively avoid the easily expandable region of the battery cell 110, and avoid the position change of the first pole 112 and the second pole 113 caused by the slight expansion of the battery cell 110, that is, the relative positions of the first pole 112 and the second pole 113 are stable, which is convenient for realizing the electrical connection of two adjacent battery cells 110 and improving the stability of the connection of the adjacent battery cells 110; meanwhile, the first pole 112 and the second pole 113 are disposed adjacent to the edge of the housing 111, so as to reduce the difficulty of connection between the two adjacent battery cells 110.

That is, through the above arrangement, the connection difficulty of the battery cells 110 is reduced, and meanwhile, the connection stability between the battery cells 110 is improved.

Optionally, as shown in fig. 2, the first pole 112 is located at the top of the first side wall 1111 and is disposed near the right side of the first side wall 1111, and the stability of the first pole 112 can be maximized by means of the connection of three adjacently disposed side walls of the housing 111 while the first pole 112 is disposed adjacent to the edge of the first side wall 1111.

Alternatively, as shown in fig. 3, the second post 113 is located at the top of the second sidewall 1112 near the right side of the second sidewall 1112. In this way, the second pole 113 can be arranged adjacent to the edge of the second side wall 1112 while ensuring that the second pole 113 can face the first pole 112, so that the stability of the second pole 113 can be improved to the maximum by means of the connection of the three side walls of the housing 111.

Alternatively, as shown in fig. 2 and 3, the first pole 112 protrudes from the first side wall 1111, and the second pole 113 protrudes from the second side wall 1112, so that when the first pole 112 and the second pole 113 of the two adjacent cells 110 are opposite to each other, the two adjacent cells 110 are arranged at intervals, so as to avoid the two adjacent cells 110 from being blocked to deform, that is, the cells 110 can be effectively deformed, thereby further improving the use safety of the cells 110.

Of course, in other examples, the outer surface of the first pole 112 is flush with the first sidewall 1111, and the outer surface of the second pole 113 is flush with the second sidewall 1112, so that when the first connecting member 120 is connected between the adjacent first pole 112 and second pole 113, two adjacent cells 110 can be arranged at intervals, and meanwhile, the occupied space of the cell assembly 100 in the length direction can be reduced, so as to reduce the volume of the cell assembly 100.

Optionally, as shown in fig. 6 and 7, the battery cell assembly 100 further includes a glue blocking member 130, where the first pole 112 and the second pole 113 are disposed adjacent to the upper edge of the housing 111, and the glue blocking member 130 is disposed between two adjacent battery cells 110 and adjacent to the lower edge of the housing 111. The glue blocking member 130 is used for blocking the glue overflow generated in the connection process of the first connecting member 120, so as to prevent the glue overflow from flowing out under the action of gravity, thereby improving the use safety of the battery cell assembly 100.

Optionally, the adhesive blocking member 130 may deform when the battery cell 110 deforms. Because the glue blocking piece 130 is arranged between two adjacent electric cores 110, the glue blocking piece 130 can generate corresponding deformation when the electric cores 110 deform, so that the extrusion degree of the glue blocking piece 130 to the electric cores 110 is slowed down, the damage to the electric cores 110 caused by the glue blocking piece 130 is avoided, the service life of the electric cores 110 is further prolonged, and the use safety of the electric cores 110 is improved.

In some embodiments of the present utility model, as shown in fig. 1, 2 and 3, the battery cell 110 further includes an explosion-proof valve 114, the housing 111 has a top wall 1113 and a bottom wall, the top wall 1113 and the bottom wall are disposed opposite to each other in a second direction, and the explosion-proof valve 114 is disposed on the top wall 1113 or the bottom wall, and the second direction is perpendicular to the first direction. The second direction is understood as the up-down direction shown in fig. 1, that is, a top wall 1113 and a bottom wall disposed opposite to each other in the up-down direction of the housing 111, and the explosion-proof valve 114 is disposed on the top wall 1113 or the bottom wall, so that the explosion-proof valve 114 is suitable for being destroyed after the abnormality of the battery cell 110, and a large amount of gas accumulated in a short time inside the battery cell 110 can be discharged through the explosion-proof valve 114, so as to ensure the safety of the battery cell 110.

Optionally, explosion-proof holes are formed on the top wall 1113 and the bottom wall of the housing 111, and the explosion-proof valve 114 is used for blocking the explosion-proof holes, and at the same time, when the battery cell 110 is abnormal, the explosion-proof valve 114 is damaged to expose the explosion-proof holes, and at the moment, the gas in the battery cell 110 can be discharged through the explosion-proof holes, so as to ensure the safety of the battery cell 110.

Alternatively, the area of the explosion proof valve 114 is not less than half the area of the top wall 1113 or the bottom wall. Here, it means that when the explosion-proof valve 114 is provided to the ceiling wall 1113, the area of the explosion-proof valve 114 is greater than or equal to half the area of the ceiling wall 1113; when the explosion-proof valve 114 is disposed on the bottom wall, the area of the explosion-proof valve 114 is greater than or equal to half of the area of the bottom wall, so that the explosion-proof valve 114 has a larger area, and thus when the battery cell 110 is abnormal and the explosion-proof valve 114 is damaged, a large amount of gas in the battery cell 110 can be rapidly discharged, so as to improve the use safety of the battery cell 110.

Alternatively, the explosion proof valve 114 has an area A1 and the top wall 1113 or the bottom wall has an area A2, wherein 0.5A2A 1 is less than or equal to 0.7A2. When A1 is less than 0.5A2, the area of the explosion-proof valve 114 is smaller, which is not beneficial to rapidly exhausting the gas in the battery cell 110, so as to reduce the use safety of the battery cell 110; when A1 > 0.7A2, the area of the explosion-proof valve 114 is opened to be large, and the structural strength of the top wall 1113 or the bottom wall is reduced, that is, the structural strength of the housing 111 is reduced.

Therefore, the area of the explosion-proof valve 114 is 0.5A2-A1-0.7A2, and the structural strength of the shell 111 can be ensured while the gas in the battery cell 110 can be rapidly discharged through the explosion-proof valve 114.

Alternatively, as shown in fig. 1, 2 and 3, the explosion-proof valve 114 is disposed near the middle of the top wall 1113 or the bottom wall. Compared with the explosion-proof valve 114 arranged at the end part of the top wall 1113 or the bottom wall, the explosion-proof valve 114 can be used for conveniently discharging most of gas in the battery cell 110, so that the gas discharging effect is improved, and the use safety of the battery cell 110 is improved.

In some examples, the explosion proof valve 114 includes a plurality of explosion proof valves 114 spaced apart on the top wall 1113 or the bottom wall, and the sum of the areas of the plurality of explosion proof valves 114 is not less than half the area of the top wall 1113 or the bottom wall. That is, not only one explosion-proof valve 114 is disposed on the top wall 1113 or the bottom wall, but also a plurality of explosion-proof valves 114 can be disposed, and the gas in the battery cell 110 can be discharged rapidly and largely by cooperation of the plurality of explosion-proof valves 114, so as to improve the use safety of the battery cell 110.

By providing a plurality of explosion-proof valves 114, it is ensured that when one of the explosion-proof valves 114 fails, the gas in the battery cell 110 can be discharged from the rest of the explosion-proof valves 114, thereby ensuring that the gas in the battery cell 110 can be smoothly discharged when the battery cell 110 is abnormal.

The battery pack 1000 according to the embodiment of the second aspect of the present utility model includes: the battery module comprises a box 200, a plurality of groups of battery cell assemblies 100 and a second connecting piece 300.

Therein, as shown in fig. 6, a receiving chamber 210 is formed in the case 200. The accommodating cavity 210 provides avoidance space for the arrangement of the multiple groups of battery cell assemblies 100, so that the multiple groups of battery cell assemblies 100 can be arranged in the box body 200.

The plurality of groups of the battery cell assemblies 100 are disposed in the accommodating cavity 210 and arranged along a third direction, the first direction and the second direction are perpendicular to each other, the battery cell assemblies 100 are the battery cell assemblies 100, and specific structures of the battery cell assemblies 100 are not described herein. That is, the foregoing plurality of sets of the battery cell assemblies 100 are disposed in the receiving chamber 210 of the case 200 and arranged in a third direction of the receiving chamber 210, wherein the third direction can be understood as a left-right direction shown in fig. 1, that is, the plurality of sets of the battery cell assemblies 100 are arranged in the left-right direction of the receiving chamber 210, so as to ensure that a greater number of the battery cell assemblies 100 can be arranged in the receiving chamber 210, thereby facilitating the increase of the capacity of the battery pack 1000.

In addition, by arranging the plurality of groups of the battery cell assemblies 100 in the accommodating cavity 210, on one hand, the plurality of groups of the battery cell assemblies 100 can be prevented from occupying the space outside the case 200, so that the battery pack 1000 is compact in structure and small in volume; on the other hand, the case 200 can be used to protect the battery cell assembly 100, so as to prolong the service life of the battery cell assembly 100 and improve the safety of the battery cell assembly 100. Meanwhile, the position of the battery cell assembly 100 can be limited by the box 200, so that the battery cell assembly 100 is prevented from being displaced by a large distance, and the position stability of the battery cell assembly 100 is improved.

As shown in fig. 8, 9 and 10, in two adjacent sets of the battery cell assemblies 100, one side of one set of the battery cell assemblies 100 exposes the first pole 112 of the battery cell 110, and one side of the other set of the battery cell assemblies 100 exposes the second pole 113 of the battery cell 110, and the second connector 300 connects the first pole 112 and the second pole 113. That is, in the adjacent two sets of the battery cell assemblies 100, the poles on the same side are the first pole 112 and the second pole 113, so that the second connection member 300 is convenient for implementing the series connection between the adjacent two sets of the battery cell assemblies 100, so that the capacity of the battery pack 1000, that is, the performance of the battery pack 1000, is convenient to be improved by using the plurality of sets of the battery cell assemblies 100.

As can be seen from the above structure, in the battery pack 1000 according to the embodiment of the present utility model, by adopting the foregoing electrical core assemblies 100 and installing multiple groups of electrical core assemblies 100 in the accommodating cavity 210 in series, the capacity of the battery pack 1000 is improved, and meanwhile, the occupied space of the battery pack 1000 in the height direction can be conveniently reduced by utilizing the characteristics of the electrical core assemblies 100, and meanwhile, the use cost of the battery pack 1000 can be reduced, the weight of the battery pack 1000 is reduced, the use safety of the battery pack 1000 is improved, and the service life of the battery pack 1000 is prolonged.

That is, the battery pack 1000 according to the present application, by adopting the foregoing electrical core assembly 100, can reduce the space occupied by the battery pack 1000, and at the same time, can also make the battery pack 1000 have the advantages of high safety, long service life, light weight, and the like.

Optionally, the second connecting piece 300 is conductive foam, and the conductive foam connects the first pole 112 and the second pole 113 at the same time, so as to realize electrical connection between the first pole 112 and the second pole 113.

In specific examples, the materials of the second connector 300 and the first connector 120 are identical, that is, the second connector 300 and the first connector 120 are formed into the same structural member, so that the first connector 120 and the second connector 300 can be processed simultaneously by using the same processing procedure when the first connector 120 and the second connector 300 are produced, thereby reducing the production difficulty of the first connector 120 and the second connector 300 and improving the production efficiency.

In some examples, the housing 200 includes removably coupled upper and lower housings that cooperate to define the receiving cavity 210 to facilitate receiving the plurality of sets of cell assemblies 100 with the housing 200.

Wherein, through can dismantle the connection with last box and lower box, like this at the in-process of battery package 1000 actual installation, can set up multiunit electric core subassembly 100 in lower box earlier, later will go up the box and connect on lower box to the realization sets up multiunit electric core subassembly 100 in the holding chamber 210 of box 200, be convenient for form complete battery package 1000, thereby reduce the assembly degree of difficulty of battery package 1000, and promote assembly efficiency. In addition, when the structural components in the box 200 are damaged, the structural components of the box 200 can be replaced or maintained conveniently, so that the maintenance difficulty of the structural components is reduced.

In some examples, as shown in fig. 6, the battery pack 1000 includes a cooling assembly 400, the cooling assembly 400 being disposed in the receiving cavity 210 and covering multiple sets of the cell assemblies 100. The cooling assembly 400 is used for cooling the plurality of groups of battery cell assemblies 100 at the same time, so that the plurality of groups of battery cell assemblies 100 are prevented from thermal runaway due to higher temperature, and therefore, the use safety of the plurality of groups of battery cell assemblies 100 is improved, and the service life of the plurality of groups of battery cell assemblies 100 is prolonged. That is, the use safety of the battery pack 1000 is improved and the service life of the battery pack 1000 is prolonged.

It should be noted that, by disposing the cooling assembly 400 in the accommodating cavity 210, the cooling assembly 400 may be protected by the case 200 to extend the service life of the cooling assembly 400 while ensuring that the cooling assembly 400 can approach the battery cell assembly 100 to cool the battery cell assembly 100.

Optionally, the cooling assembly 400 and the explosion proof valve 114 are disposed opposite in a second direction of the cell assembly 100. That is, when the explosion-proof valve 114 is disposed on the top wall 1113 of the cell 110, the cooling assembly 400 is disposed proximate to the bottom wall of the cell 110; accordingly, when the explosion-proof valve 114 is disposed on the bottom wall of the battery cell 110, the cooling assembly 400 is disposed near the top wall 1113 of the battery cell 110, so as to avoid the cooling assembly 400 from obstructing the gas in the battery cell 110 from being discharged through the explosion-proof valve 114, that is, ensure that the gas in the battery cell 110 can be smoothly discharged when the explosion-proof valve 114 is damaged, so as to ensure the use safety of the battery cell 110, that is, ensure the use safety of the battery pack 1000.

Alternatively, as shown in fig. 6, the cooling assembly 400 includes a heat conductive member 410 and a cooling member 420, and the heat conductive member 410 is disposed between the cell assembly 100 and the cooling member 420. The heat conducting member 410 is used for transferring heat on the battery cell assembly 100 to the cooling member 420, and then cooling the received heat by the cooling member 420, so as to achieve the purpose of cooling the battery cell assembly 100, thereby improving the use safety of the battery cell assembly 100.

In some examples, the heat conductive member 410 is formed as a heat conductive glue that is adhered to the cell assembly 100 and the cooling member 420, respectively, and the cooling member 420 may be fixedly connected to the cell assembly 100 while the heat on the cell assembly 100 is transferred to the cooling member 420, so that the cooling member 420 is stably positioned with respect to the cell assembly 100, thereby facilitating the cooling of the cell assembly 100 by the cooling member 420.

Optionally, the cooling member 420 is formed as a cooling plate, and the cooling plate is filled with cooling water, and the cooling water continuously exchanges heat with the heat transferred to the cooling plate, so as to achieve the purpose of cooling the battery cell assembly 100.

It should be further noted that, by providing the cooling member 420 as a cooling plate, when the cooling plate is disposed on the bottom wall of the cell assembly 100, the cell assembly 100 may be further supported by the cooling plate, so as to further improve the position stability of the cell assembly 100.

That is, the cooling assembly 400 of the present application not only can cool the battery cell assembly 100 to enable the self temperature of the battery cell assembly 100 to be stabilized in a proper range, but also can support the battery cell assembly 100 to improve the position stability of the battery cell assembly 100, thereby improving the overall structural stability of the battery pack 1000.

The power device according to the third embodiment of the present utility model includes the aforementioned battery pack 1000, and the specific structure of the battery pack 1000 is not described herein.

As can be seen from the above structure, the power device according to the embodiment of the present utility model, by adopting the battery pack 1000, can reduce the production cost of the power device and increase the space utilization rate of the power device in the height direction while ensuring the safety of the power device.

The power unit of the present application may be an electric drive unit such as an electric vehicle, an aircraft, or a ship.

In some examples, a mounting plate is provided on the case 200 of the battery pack 1000, and a plurality of mounting holes are provided on the mounting plate, and the battery pack 1000 is fixedly connected in the vehicle by fasteners penetrating through the mounting holes, so that the battery pack 1000 is stable relative to the vehicle.

Optionally, the fastener is a bolt, and the bolt passes through a mounting hole on the case 200 of the battery pack 1000 and is fixedly connected to the vehicle floor, so as to realize the fixed connection between the battery pack 1000 and the vehicle floor, thereby realizing the fixed battery pack 1000.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A cell assembly, comprising:

a plurality of cells (110) arranged along a first direction, the cells (110) comprising:

a housing (111), the housing (111) having a first side wall (1111) and a second side wall (1112) disposed opposite to each other in the first direction, the first side wall (1111) and the second side wall (1112) having an area larger than that of the remaining side walls of the housing (111);

-a first pole (112), the first pole (112) being provided to the first side wall (1111);

a second pole (113), wherein the second pole (113) is arranged on the second side wall (1112) and faces the first pole (112), and in two adjacent electric cores (110), the first pole (112) of one electric core (110) faces the second pole (113) of the other electric core (110);

the first connecting piece (120) is arranged between the first pole (112) and the second pole (113) of two adjacent electric cores (110) and is electrically connected with the first pole (112) and the second pole (113) respectively;

the first connecting piece (120) can generate corresponding deformation when the battery cell (110) is deformed.

2. The cell assembly of claim 1, wherein the first connector (120) forms a flexible connector;

the flexible connecting piece comprises a flexible piece and a conductive piece, wherein the conductive piece is wrapped on the periphery of the flexible piece and is respectively connected with the first pole (112) and the second pole (113).

3. The cell assembly of claim 2, wherein the flexible member is formed as one of a sponge member, a foam member, or a rubber member; and/or the conductive member is formed as a conductive cloth.

4. The cell assembly of claim 2, wherein the flexible connector further comprises a flame retardant member, the flame retardant member being wrapped around the periphery of the conductive member.

5. The cell assembly according to claim 2, wherein the first connection member (120) is bonded to the first terminal (112) and the second terminal (113), respectively.

6. The cell assembly of claim 5, wherein the first pole (112) and the second pole (113) are disposed adjacent an edge of the housing (111).

7. The cell assembly of claim 6, further comprising a glue barrier (130);

the first pole (112) and the second pole (113) are arranged adjacent to the upper edge of the shell (111), the glue blocking piece (130) is arranged between two adjacent electric cores (110) and adjacent to the lower edge of the shell (111), and the glue blocking piece (130) can generate corresponding deformation when the electric cores (110) deform.

8. The cell assembly according to any of claims 1-7, wherein the cell (110) further comprises an explosion-proof valve (114);

the casing (111) is provided with a top wall (1113) and a bottom wall which are oppositely arranged in a second direction, the explosion-proof valve (114) is arranged on the top wall (1113) or the bottom wall, the area of the explosion-proof valve (114) is not smaller than half of the area of the top wall (1113) or the bottom wall, and the second direction is mutually perpendicular to the first direction.

9. A battery pack, comprising:

a case (200), wherein a housing chamber (210) is formed in the case (200);

a plurality of groups of electric core components (100), wherein the electric core components (100) are arranged in the accommodating cavity (210) and are arranged along a third direction, the first direction and the second direction are mutually perpendicular, and the electric core components (100) are electric core components (100) according to any one of claims 1-8;

and the second connecting piece (300) is arranged in two adjacent groups of the battery cell assemblies (100), one group of the battery cell assemblies (100) is exposed out of the first pole (112) of the battery cell (110), the other group of the battery cell assemblies (100) is exposed out of the second pole (113) of the battery cell (110), and the second connecting piece (300) is connected with the first pole (112) and the second pole (113).

10. A power plant, characterized by comprising a battery pack (1000) according to claim 9.

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