Battery modules and electrical equipment

Abstract

This application discloses a battery module and an electrical device having the battery module, the battery module comprising a case, a battery cell assembly and an elastic member. The battery cell assembly is housed within the case and comprises battery cell units arranged along a first direction. The elastic member comprises a base and a bend. The base is connected to the bend. The bend is fixed to the case. In the first direction, the elastic member and the battery cell assembly are arranged and installed. The base is positioned to apply pressure to the battery cell units, and the bend is positioned to provide expansion space to the battery cell units, thereby buffering the pressurized force on the battery cell assembly and reducing its impact on the battery module's lifespan. By continuously applying pressure to the battery cell assembly by the base, the battery cell assembly remains pressurized, maintaining dynamic equilibrium, which is advantageous for improving the battery module's lifespan.

Description

Technical Field

[0001] This application relates to the field of energy storage technologies, and particularly to a type of battery module and an electrical device.

Background Art

[0002] Currently, it is widely applied in fields such as drones, electric vehicles, and smart energy storage devices. The battery module extends its service life through a pressurization design. Currently, the pressurizing force is provided by foamed sponge steel strips, foamed sponge end plates, etc., and the structure is relatively complex.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of the above circumstances, there is a need to provide a type of battery module and an electrical device that can provide a pressurizing force and an expansion space to the battery cells and reduce the impact on the service life of the battery module.

Means for Solving the Problems

[0004] The embodiment of this application provides a battery module, which includes a case, a battery cell assembly, and an elastic member. The battery cell assembly is provided inside the case, and the battery cell assembly includes battery cell units arranged along a first direction. The elastic member includes a base portion and a bending portion. The base portion is connected to the bending portion. The bending portion is fixed to the case. In the first direction, the elastic member and the battery cell assembly are arranged and installed. The base portion is arranged to be able to apply pressure to the battery cell units, and the bending portion is arranged to be able to provide an expansion space to the battery cell units, buffer the pressurizing force received by the battery cell assembly, reduce the impact on the service life of the battery module, and by continuously applying pressure to the battery cell assembly by the base portion, the battery cell assembly is in a pressurized state, maintaining dynamic equilibrium, which is beneficial to improving the service life of the battery module.

[0005] In some embodiments of this application, the bend includes a first bend and a second bend, which are optionally positioned relative to the second bend along a second direction. The first and second bends are connected to opposite sides of the base, where the second direction is perpendicular to the first direction. The first and second bends can provide expansion space for the battery cell assembly.

[0006] In some embodiments of this application, the elastic member optionally includes a first connecting segment. The first connecting segment is connected to the side away from the base of the first bend. The first connecting segment is fixed to the case and can transmit the forces acting on the bend to the case.

[0007] In some embodiments of this application, the first connecting segment is optional, parallel to the base, which is advantageous for the elastic member to deform along the first direction.

[0008] In some embodiments of this application, the first bend includes a first bend segment and a second bend segment, which are optional. The first bend segment is connected to a base and the second bend segment. The second bend segment is connected to a first connecting segment.

[0009] In some embodiments of this application, the first bent segment and the base form a first angle A1. The second bent segment and the first connecting segment form a second angle B1, where A1 ≥ B1, which is advantageous in increasing the ability of the first bent segment to resist deformation and in reducing the risk of the elastic member deforming along the first direction.

[0010] In some embodiments of this application, the first and second bend segments are selectively arranged to form a third angle C1 such that C1 > A1, which is advantageous for improving uniform deformation of the first bend.

[0011] In some embodiments of this application, C1=2A1=2B1, which is advantageous for further improving the uniform deformation of the first bent portion.

[0012] In some embodiments of this application, the case includes a top wall, which is provided with a first fixing portion. Along a first direction, the projection of the first connecting segment overlaps with the projection of the first fixing portion. The first connecting segment is fixed to the first fixing portion and can transmit the force acting on the bent portion to the top wall.

[0013] In some embodiments of this application, the structural strength of the top wall is optionally greater than that of the elastic member, thereby reducing the risk of deformation of the top wall due to the force acting on the first bent portion.

[0014] In some embodiments of this application, the elastic member optionally includes a second connecting segment. The second connecting segment is connected to the side away from the base of the second bend. The second connecting segment is fixed to the case and can transmit the forces acting on the bend to the case.

[0015] In some embodiments of this application, the second connecting segment is optional and is parallel to the base, which is advantageous for the elastic member to deform along the first direction.

[0016] In some embodiments of this application, the case includes a bottom wall, as can be selected. The top wall is positioned relative to the bottom wall along a second direction. The bottom wall is provided with a second fixing portion. Along the first direction, the projection of the second connecting segment overlaps with the projection of the second fixing portion. The second connecting segment is fixed to the second fixing portion and can transmit the forces acting on the bent portion to the bottom wall.

[0017] In some embodiments of this application, the structural strength of the bottom wall is optionally greater than that of the elastic member, thereby reducing the risk of deformation of the bottom wall due to the force acting on the first bent portion.

[0018] In some embodiments of this application, the structures of the first and second bends are identical, which is advantageous for uniform force distribution and uniform deformation.

[0019] In some embodiments of this application, the case includes a front wall, which can be selected as such. The front wall and the battery cell assembly are positioned along a first direction. Along the first direction, an elastic member is provided between the front wall and the battery cell assembly.

[0020] In some embodiments of this application, the battery module includes two elastic members, as can be selected. Along a first direction, one elastic member is provided between the front wall and the battery cell assembly. The other elastic member is provided on the side away from the front wall of the battery cell assembly, and the case and the elastic members form a housing space. The battery cell assembly is provided within the housing space, which can apply further pressure to the battery cell assembly and contract in response to the expansion of the battery cell assembly to provide further expansion space to the battery cell assembly, which is advantageous for improving the service life of the battery module, and the formation of the housing space by the case and the elastic members can reduce material and lower costs.

[0021] In some embodiments of this application, the case and the elastic member can optionally form a housing space, and the battery cell assembly can be housed within the housing space, thereby reducing material and lowering costs.

[0022] In some embodiments of this application, each battery cell unit includes a battery cell and a holder, the battery cell including a battery cell case, an electrode assembly provided within the battery cell case, and electrode terminals connected to the electrode assembly and extending out of the battery cell case. The battery cell case includes a body and a first seal. The electrode assembly is provided within the body. The body includes a first side and a second side arranged along a second direction. The electrode terminals extend from the first seal. The holder includes a first extension, the first extension covering at least a portion of the first side. Along the first direction, the first extension is movably positioned relative to the case to reduce friction with the case as the body moves, facilitating movement and protecting the body, reducing the risk of the body being damaged and affecting the use of the battery module.

[0023] In some embodiments of this application, a sliding member is provided between the first extension and the top wall, which can be selected as necessary. The sliding member reduces the frictional force between the first extension and the top wall and facilitates the first extension facing the top wall.

[0024] In some embodiments of this application, a first extension is provided in a third direction on a portion of the first side and a portion of the second seal, protecting a portion of the main body and a portion of the second seal, increasing the connection strength between the holder and the battery cell, and facilitating the integral molding of the holder with the battery cell.

[0025] In some embodiments of this application, a first extension is provided along a third direction, extending over the entire first side and the entire second seal, to provide better protection to the main body and the second seal, and to increase the connection strength between the holder and the battery cell.

[0026] Optionally, in some embodiments of the present application, the holder includes a second extension portion that covers at least a part of the second side surface. Along the first direction, the second extension portion is movably arranged relative to the case, reducing the friction with the case when the main body moves, facilitating the movement and protecting the main body, and reducing the risk that the main body is damaged and affects the use of the battery module.

[0027] Optionally, in some embodiments of the present application, a slide member is provided between the second extension portion and the bottom wall. The slide member reduces the frictional force between the second extension portion and the bottom wall and facilitates the movement of the second extension portion relative to the bottom wall.

[0028] Optionally, in some embodiments of the present application, along the third direction, a second extension portion is provided on a part of the second side surface and a part of the other second sealing portion, protecting a part of the main body and a part of the other second sealing portion, enhancing the connection strength between the holder and the battery cell, and facilitating the integral molding of the holder and the battery cell.

[0029] Optionally, in some embodiments of the present application, along the third direction, the second extension portion is provided on the entire second side surface and the entire other second sealing portion, providing better protection for the main body and the second sealing portion, and further enhancing the connection strength between the holder and the battery cell.

[0030] Optionally, in some embodiments of the present application, the holder is integrally molded with the battery cell, which is advantageous for improving the connection strength between the holder and the battery cell.

[0031] Optionally, in some embodiments of the present application, the holder includes an insulating holder, which is advantageous for reducing the risk of short - circuit between the holder and the battery cell.

[0032] Optionally, in some embodiments of the present application, adjacent main body portions are in contact and connected, which is advantageous for pressurizing the main body portions.

[0033] In some embodiments of this application, optionally, there is mutual pressure between adjacent battery cell cases, which is advantageous in pressurizing multiple battery cell units and improving the lifespan of the battery cell units.

[0034] In some embodiments of this application, the battery cell may optionally include one of a soft pack battery cell and a prismatic case battery cell.

[0035] In some embodiments of this application, the first sealing portion may be selected to include a first connector, a second connector, and a third connector. The holder includes a first portion, the first portion covering a portion of the first connector, and the electrode terminals extending from the first portion protecting a portion of the first connector.

[0036] In some embodiments of this application, the holder optionally includes a first side and a second side. The first side covers the second connection, and the second side covers the third connection and can protect a portion of the first seal.

[0037] In some embodiments of this application, the holder optionally includes a second portion. The second portion covers a portion of the first wall, and the second portion, together with the first portion, the first side portion and the second side portion, forms a first space. A portion of the first connection portion is located within the first space and can protect the circumferential side of the first connection portion. The first space provides an expansion space for the first seal portion, reducing the effect of gas generation and / or free electrolyte in the battery cell on the sealing performance of the first seal portion, and the first space can further dissipate heat from the battery cell.

[0038] In some embodiments of this application, as selectable, when viewed from a direction opposite to the third direction, the second portion is located between the third and fourth walls along the first direction. The second portion does not extend beyond the third wall in the first direction, and the second portion does not extend beyond the fourth wall along the first direction. When adjacent battery cell cases are in contact and connected, a gap exists between adjacent second portions, which reduces the impact of the pressure applied to the second portion by the adjacent battery cell cases, reduces the force acting on the first seal portion, and is advantageous for protecting the first seal portion and improving the stability of the holder's connection to the battery cells.

[0039] In some embodiments of this application, the holder optionally includes a third portion, the third portion being connected to the side of the second portion toward the first portion. The third portion extends from the second portion along the third direction, and the third portion covers a portion of the first connection. The third portion can support and protect the portion of the first seal portion extending from the second portion, reducing the risk of damage to the first seal portion affecting the sealing of the battery cell.

[0040] In some embodiments of this application, the holder optionally includes a fourth portion. The fourth portion is connected to the first portion. At least one electrode terminal is provided on the fourth portion. Along the third direction, the projection of the electrode terminal overlaps with the projection of the fourth portion, facilitating the connection of the sampling member to the electrode terminal and improving the stability of the connection between the sampling member and the electrode terminal.

[0041] In some embodiments of this application, the battery cell assembly includes a first battery cell unit and a second battery cell unit, as selectable. Along a first direction, a second space exists between the holder of the first battery cell unit and the holder of the second battery cell unit. A fourth portion of the first battery cell unit faces a fourth portion of the second battery cell unit. A fourth portion of the second battery cell unit faces a fourth portion of the first battery cell unit.

[0042] Selectively, in some embodiments of this application, the battery cell assembly includes a third battery cell unit. The second and third battery cell units are arranged adjacent to each other along a first direction, with a fourth portion of the third battery cell unit separated from the first portion of the second battery cell unit.

[0043] In some embodiments of this application, the electrode terminals of the first battery cell unit, the electrode terminals of the second battery cell unit, and the electrode terminals of the third battery cell unit are stacked and arranged along a third direction to form a first stacked portion. Along the third direction, the projection of the first stacked portion is located between the projection of the fourth portion of the second battery cell unit and the projection of the fourth portion of the third battery cell unit, reducing interference between the fourth portion and the first stacked portion and facilitating welding of the first stacked portion.

[0044] In some embodiments of this application, the projection of the first stacked portion is optionally located along a third direction between the projection of the first portion of the second battery cell unit and the projection of the first portion of the third battery cell unit, further facilitating the welding of the first stacked portion and reducing the influence on the holder during the welding process.

[0045] In some embodiments of this application, a third space exists between the holder of the third battery cell unit and the holder of the second battery cell unit, as selectable. Along the third direction, the projection of the first stacked portion is located within the projection of the third space, further reducing interference between the fourth portion and the first stacked portion and further facilitating welding of the first stacked portion.

[0046] In some embodiments of this application, the battery cell assembly includes a fourth battery cell unit, wherein the third and fourth battery cell units are arranged adjacent to each other along a first direction. The fourth portion of the third battery cell unit faces the fourth portion of the fourth battery cell unit, and the fourth portion of the fourth battery cell unit faces the fourth portion of the third battery cell unit.

[0047] In some embodiments of this application, as selectable, a fourth space exists between the holder of the third battery cell unit and the holder of the fourth battery cell unit along a first direction, and the electrode terminals of the fourth battery cell unit are bent and connected to the first stacked portion to form an overlapping portion.

[0048] In some embodiments of this application, the projection of the overlapping portion is optionally located along a third direction between the projection of the fourth portion of the second battery cell unit and the projection of the fourth portion of the third battery cell unit to facilitate welding of the overlapping portion.

[0049] In some embodiments of this application, the projection of the overlapping portion is optionally located along a third direction between the projection of the first portion of the second battery cell unit and the projection of the first portion of the third battery cell unit, further facilitating the welding of the first stacked portion and reducing the influence on the holder during the welding process.

[0050] In some embodiments of this application, the projection of the overlapping portion is located in the projection of the third space along a third direction, and the fourth portion further reduces interference with the overlapping portion and further facilitates welding of the overlapping portion.

[0051] In some embodiments of this application, the battery module includes a first conductive member, one end of which is fixed to an elastic member. The first conductive member includes a buffer portion, which is positioned to be stretched along a first direction by the elastic member when the battery cell assembly expands, and the buffer portion is advantageous in that it buffers the tensile force on the first conductive member by the elastic member and improves the connection strength between the first conductive member and the elastic member.

[0052] In some embodiments of this application, the first conductive member is optionally connected to the electrode terminals. The first conductive member is arranged to be used for receiving or outputting electrical energy from the battery cell assembly, and as the battery cell assembly expands, the buffer reduces the tensile force on the electrode terminals, which is advantageous for protecting the electrode terminals.

[0053] In some embodiments of this application, the first conductive member optionally includes a first conductive portion, a second conductive portion, and a third conductive portion. A buffer portion is provided in the first conductive portion. The first conductive portion is connected to the third conductive portion. The second conductive portion is connected to the third conductive portion. The first conductive portion is more flexible than the second conductive portion, and as the battery cell expands, the first conductive portion is more easily stretched, which is advantageous for the movement of the battery cell unit.

[0054] In some embodiments of this application, the third conductive portion is optionally provided with a third fixing portion. The third fixing portion is fixed to the base of an elastic member away from the front wall. Along the first direction, the projection of the third fixing portion is separated from the projection of the battery cell case, allowing the first conductive member to be stretched more effectively along the first direction.

[0055] In some embodiments of this application, as selectable, the distance between the buffer and the elastic member away from the front wall along a first direction is smaller than the distance between the buffer and the elastic member closer to the front wall, which is further advantageous for stretching the buffer.

[0056] One embodiment of the present application further provides an electrical device which includes a battery module as described in any of the embodiments described above. [Effects of the Invention]

[0057] The aforementioned battery module and electrical equipment can buffer the pressure applied to the battery cell assembly, reducing its impact on the battery module's lifespan. By continuously applying pressure to the battery cell assembly via the base, the battery cell assembly remains under pressure, maintaining dynamic equilibrium, which is advantageous for improving the battery module's lifespan. [Brief explanation of the drawing]

[0058] [Figure 1] Schematic diagrams of the battery module structure in several embodiments are shown. [Figure 2] The following are schematic diagrams of disassembled battery cell modules in several embodiments. [Figure 3] Schematic diagrams of the top wall structure in several embodiments are shown. [Figure 4] Schematic diagrams of the partial structure of a battery module in several embodiments are shown. [Figure 5] Schematic diagrams of the partial structure of a battery module in several embodiments are shown. [Figure 6] Schematic diagrams of the battery cell structure in several embodiments are shown. [Figure 7] A schematic diagram of the battery cell structure as observed from the third direction Z and the opposite direction Z' in some embodiments is shown. [Figure 8] Schematic diagrams of disassembled battery cells in several embodiments are shown. [Figure 9] Schematic diagrams of the battery cell structure in several other embodiments are shown. [Figure 10] Schematic diagrams of the battery cell and holder structure in several embodiments are shown. [Figure 11] Figure 10 shows a schematic diagram of the battery cell and holder from a different viewpoint in the embodiment shown. [Figure 12] Figure 10 shows a schematic diagram of the battery cell and holder from yet another viewpoint in the embodiment shown. [Figure 13] Figure 10 shows a schematic diagram of the battery cell and holder from yet another viewpoint in the embodiment shown. [Figure 14] A schematic diagram of the battery cell unit structure as observed from the third direction Z and the opposite direction Z' in some embodiments is shown. [Figure 15] Schematic diagrams of the partial structures of Figure 10 in several embodiments are shown. [Figure 16] Schematic diagrams of other substructures of Figure 10 in several embodiments are shown. [Figure 17] Schematic diagrams of the battery cell unit and elastic member in several embodiments are shown. [Figure 18] Schematic diagrams of the elastic member structure in several embodiments are shown. [Figure 19]A schematic diagram of the elastic member from a different perspective in several embodiments is shown. [Figure 20] A schematic diagram of the elastic member from yet another viewpoint in several embodiments is shown. [Figure 21] Cross-sectional views of multiple battery cell units in several embodiments are shown. [Figure 22] A magnified view of a portion of Figure 21 is shown. [Figure 23] Schematic diagrams of the partial structure of a battery module in several embodiments are shown. [Figure 24] A magnified view of a portion of Figure 23 is shown. [Figure 25] Schematic diagrams of the partial structure of a battery module from different perspectives in several embodiments are shown. [Figure 26] A magnified view of a portion of Figure 25 is shown. [Figure 27] Schematic diagrams of the sampling member structure in several embodiments are shown. [Figure 28] Schematic diagrams of the partial structure of a battery module in several embodiments are shown. [Figure 29] A schematic diagram of the structure of the first conductive member in several embodiments is shown. [Figure 30] A schematic diagram of the structure of the second conductive member in several embodiments is shown. [Figure 31] Schematic diagrams of the structure of electrical equipment in several embodiments are shown. [Modes for carrying out the invention]

[0059] The following specific embodiments are illustrative and not limiting, and are intended to provide a basic understanding of this application, and are not intended to limit the essential elements or scope of protection of this application. Unless there is a structural inconsistency, the technical features mentioned in each embodiment can be combined in any manner.

[0060] When one component is considered to be "installed" on another component, it may be directly installed on top of the other component, or there may be an intermediate component. When one component is considered to be "connected" to another component, it may be directly connected to the other component, or there may be an intermediate component.

[0061] It is understood that the terms “perpendicular” and “equal” are used to describe an ideal state between two parts. In actual production or use, a state close to perpendicular or equal may exist between two parts. For example, combining numerical descriptions, perpendicular may mean that the angle range between two lines is between 90° ± 10°, perpendicular may mean that the angle range between the two faces of two planes is between 90° ± 10°, and perpendicular may mean that the angle range between a line and a plane is between 90° ± 10°. Two parts described as “perpendicular” do not have to be absolute lines or planes; they may be approximately lines or planes, and if the overall extension direction is a line or plane when viewed macroscopically, then the parts are considered to be “straight” or “plane”.

[0062] The term "parallel" is used to describe an ideal state between two parts. In actual production or use, a state close to parallel may exist between two parts. For example, combining numerical descriptions, parallel can mean that the angle range between two straight lines is between 180° ± 10°, parallel can mean that the angle range between the two faces of two planes is between 180° ± 10°, and parallel can mean that the angle range between a straight line and a plane is between 180° ± 10°. Two parts described as "parallel" do not have to be absolute straight lines or planes; they may be approximately straight lines or planes, and if the overall extension direction is straight or plane when viewed macroscopically, then the parts are considered "straight lines" or "planes."

[0063] Unless otherwise defined, the term “multiple” in this specification, when describing the quantity of parts, specifically refers to two or more parts.

[0064] The first direction X includes the first direction X and the direction opposite to the first direction X; the second direction Y includes the second direction Y and the direction opposite to the second direction Y; and the third direction Z includes the third direction Z and the direction opposite to the third direction Z. For the sake of clarity, the electrode terminals 21c in Figures 6-8, 10-12, and 15-16 are not bent.

[0065] Referring to Figures 1 to 5 and Figures 17 to 20, one embodiment of the present application provides a battery module 100, which includes a case 10, a battery cell assembly 20, and an elastic member 30. The battery cell assembly 20 is housed within the case 10 and includes a plurality of battery cell units 20a arranged along a first direction X. The elastic member 30 includes a base 31 and a bend 32, the base 31 being connected to the bend 32, and the bend 32 being fixed to the case 10. In the first direction X, the elastic member 30 and the battery cell assembly 20 are arranged and positioned. The base 31 is positioned to allow pressure to be applied to the battery cell assembly 20, and the bend 32 is positioned to provide expansion space to the battery cell assembly 20. The first direction X includes the first direction X and the direction opposite to the first direction X.

[0066] In some embodiments, when the battery cell assembly 20 expands, the pressure applied to the battery cell assembly 20 increases, and the bent portion 32 provides expansion space to the battery cell assembly 20, thereby buffering the pressurizing force applied to the battery cell assembly 20 and reducing its impact on the service life of the battery module 100. By continuously applying pressure to the battery cell assembly 20 via the base portion 31, the battery cell assembly 20 remains in a pressurized state, maintaining dynamic equilibrium, which is advantageous for improving the service life of the battery module 100.

[0067] In some embodiments, the elastic member 30 and the battery cell assembly 20 are arranged and installed along a first direction X.

[0068] In some embodiments, the elastic member 30 and the battery cell assembly 20 are arranged and installed along a direction opposite to the first direction X.

[0069] In some embodiments, if the battery module 100 includes a plurality of battery cell assemblies 20, the elastic member 30 may be provided between two adjacent battery cell assemblies 20.

[0070] In some embodiments, the case 10 includes a first side wall 11, a second side wall 12, a front wall 13, a top wall 14, a bottom wall 15, and a rear wall (not shown). The top wall 14 and the bottom wall 15 are arranged along a second direction Y, and the first side wall 11 and the second side wall 12 are arranged along a third direction Z. The front wall 13 is connected to the first side wall 11 and the second side wall 12. The first direction X, the third direction Z, and the second direction Y are each perpendicular to each other. The top wall 14 is connected to the front wall 13, the first side wall 11, and the second side wall 12, and the bottom wall 15 is connected to the front wall 13, the first side wall 11, and the second side wall 12. The front wall 13, the first side wall 11, the second side wall 12, the top wall 14, the bottom wall 15, and the rear wall form a housing space, and the battery cell assembly 20 and the elastic member 30 are provided within the housing space.

[0071] Referring to Figures 1 to 5, in some embodiments, the case 10 includes a front wall 13, a first side wall 11, a second side wall 12, a top wall 14, and a bottom wall 15. The front wall 13 and the elastic member 30 are arranged along a first direction X, the top wall 14 and the bottom wall 15 are arranged along a second direction Y, and the first side wall 11 and the second side wall 12 are arranged along a third direction Z. The front wall 13 is connected to the first side wall 11 and the second side wall 12, the top wall 14 is connected to the front wall 13, the elastic member 30, the first side wall 11 and the second side wall 12, and the bottom wall 15 is connected to the front wall 13, the elastic member 30, the first side wall 11 and the second side wall 12. The top wall 14, the bottom wall 15, the front wall 13, the elastic member 30, the first side wall 11 and the second side wall 12 form a housing space, and the battery cell assembly 20 is provided within the housing space. This is advantageous for reducing the number of rear walls and simplifying the assembly process.

[0072] Referring to Figures 6, 7, and 8, the battery cell unit 20a includes a battery cell 21, which includes a soft pack battery cell. The battery cell 21 includes a battery cell case 21a, an electrode assembly 21b, and electrode terminals 21c, the electrode terminals 21c being connected to the electrode assembly 21b and extending out from the battery cell case 21a.

[0073] In some embodiments, the battery cell case 21a includes a main body 211, the main body 211 is provided with a housing space, and the electrode assembly 21b is provided within the main body 211. The main body 211 includes a first case 211a and a second case 211b, the first case 211a is provided with a first recess 2111, and the second case 211b is provided with a second recess 2112. The first case 211a is connected to the second case 211b and forms a housing space. Part of the electrode assembly 21b is provided in the first recess 2111, and part of it is provided in the second recess 2112.

[0074] In some embodiments, the main body 211 is provided with a housing space, and the main body 211 includes a first case 211a and a second case 211b, the first case 211a is provided with a first recess 2111, and the second case 211b is flat. The first case 211a is connected to the second case 211b and forms the housing space. The electrode assembly 21b is provided in the first recess 2111.

[0075] In some embodiments, the battery cell case 21a includes a first seal portion 212 and a second seal portion 213, and the electrode terminals 21c extend from the first seal portion 212 into the battery cell case 21a. The circumferential side of the first case 211a extends outward to form a first extended edge 2113, and the circumferential side of the second case 211b extends outward to form a second extended edge 2114. After the first case 211a is connected to the second case 211b, the first extended edge 2113 and the second extended edge 2114 are overlapped and sealed together to form two first seal portions 212 and two second seal portions 213. Two first seal portions 212 are installed along a third direction Z, and two second seal portions 213 are installed along a second direction Y. One first seal portion 212 is connected to the two second seal portions 213, and the other first seal portion 212 is connected to the two second seal portions 213.

[0076] Selectively, the battery cell 21 includes two electrode terminals 21c, one of which extends from one first seal portion 212 to the battery cell case 21a, and the other electrode terminal 21c extends from the other first seal portion 212 to the battery cell case 21a.

[0077] In some embodiments, the battery cell 21 includes two electrode terminals 21c, the two electrode terminals 21c extending from the same first seal portion 212 to the battery cell case 21a.

[0078] In some embodiments, the first extended edge 2113 and the second extended edge 2114 are overlapped and sealed together to form a first seal portion 212 and two second seal portions 213. The two second seal portions 213 are positioned along a second direction Y, and the first seal portion 212 is connected to the two second seal portions 213. The battery cell 21 includes two electrode terminals 21c, which extend from the first seal portion 212 to the battery cell case 21a.

[0079] In some embodiments, the main body 211 includes a first wall 211c, a second wall 211d, a third wall 211e, and a fourth wall 211f. The second wall 211d and the first wall 211c are installed along a third direction Z, and the third wall 211e and the fourth wall 211f are installed along a first direction X. Optionally, the first seal portion 212 is connected to the first wall 211c. Optionally, one first seal portion 212 is connected to the first wall 211c, and the other first seal portion 212 is connected to the second wall 211d.

[0080] In some embodiments, the main body 211 includes a first side 211g and a second side 211h, the first side 211g and the second side 211h being positioned along a second direction Y. One second seal portion 213 is connected to the first side 211g, and the other second seal portion 213 is connected to the second side 211h.

[0081] In some embodiments, the first sealing portion 212 includes a first connector 212a, a second connector 212b, and a third connector 212c. The electrode terminal 21c extends from the first connector 212a. The first connector 212a is connected to the second connector 212b and the third connector 212c, which are positioned along a second direction Y. The second connector 212b is positioned bent relative to the first connector 212a, and the third connector 212c is positioned bent relative to the first connector 212a. When viewed from a direction Z' opposite to the third direction Z, along the first direction X, the second connector 212b and the third connector 212c are located on the same side of the first connector 212a.

[0082] Referring to Figures 5 and 6, in some embodiments, adjacent body portions 211 are connected in contact, which is advantageous for pressurizing the body portions 211. Optionally, the third wall 211e of a battery cell case 21a is connected in contact with the fourth wall 211f of an adjacent battery cell case 21a. Optionally, the third wall 211e of a battery cell case 21a is connected in contact with the third wall 211e of an adjacent battery cell case 21a, and the fourth wall 211f of a battery cell case 21a is connected in contact with the fourth wall 211f of an adjacent battery cell case 21a.

[0083] In some embodiments, mutual pressure exists between adjacent battery cell cases 21a, resulting in a pressurized state for multiple battery cell units 20a, which is advantageous for improving the service life of the battery cell units.

[0084] Referring to Figure 9, in some embodiments, the battery cell 21 includes a prismatic case battery cell. The prismatic case battery cell includes a rigid outer shell, and the electrode assembly 21b is housed within the rigid outer shell.

[0085] Referring to Figures 6, 10 to 16, in some embodiments, each battery cell unit 20a includes a holder 22, which is connected to and protects the battery cell 21.

[0086] In some embodiments, the holder 22 is integrally molded with the battery cell 21, which is advantageous for improving the connection strength between the holder 22 and the battery cell 21. Optionally, the holder 22 is integrally molded with the battery cell 21 by low-pressure injection molding.

[0087] In some embodiments, the holder 22 includes an insulating holder, which is advantageous in reducing the risk of a short circuit between the holder 22 and the battery cell 21.

[0088] In some embodiments, the outer surface of the main body 211 may be provided with several insulating members, such as an insulating film, to better protect the main body 211.

[0089] In some embodiments, the holder 22 includes a first portion 221 which covers and protects a portion of the first connector 212a. The electrode terminal 21c extends from the first portion 221.

[0090] In some embodiments, the holder 22 includes a first side portion 222 and a second side portion 223. The first side portion 222 covers the second connecting portion 212b, and the second side portion 223 covers the third connecting portion 212c, thereby providing protection to a portion of the first sealing portion 212.

[0091] In some embodiments, the first portion 221 is connected to the first side portion 222 and the second side portion 223, which can increase the structural strength of the holder 22 and is advantageous for protecting the first seal portion 212.

[0092] Referring to Figures 10-16, 23 and 26, in some embodiments, the holder 22 includes a first extension 224 that extends from the first side portion 222 along a direction Z' opposite to the third direction Z, and the first extension 224 covers the first side portion 211g and the second seal portion 213, thereby protecting the main body portion 211 and the second seal portion 213, and increasing the connection strength between the holder 22 and the battery cell 21. The first extension 224 is connected to the top wall 14, and the first extension 224 is movably positioned relative to the top wall 14, thereby reducing friction with the top wall 14 when the main body portion 211 moves, facilitating movement, protecting the main body portion 211, and reducing the risk of the main body portion 211 being damaged and affecting the use of the battery module.

[0093] In some embodiments, the first extension 224 is connected to the top wall 14 by contact.

[0094] In some embodiments, a sliding member (not shown) is provided between the first extension portion 224 and the top wall 14, and the sliding member reduces the frictional force between the first extension portion 224 and the top wall 14, and facilitates the movement of the first extension portion 224 relative to the top wall 14.

[0095] Selectively, along the third direction Z, a first extension portion 224 is provided on a part of the first side surface 211g and a part of the second sealing portion 213, providing protection to a part of the main body portion 211 and a part of the second sealing portion 213, increasing the connection strength between the holder 22 and the battery cell 21, and facilitating the integral molding of the holder 22 with the battery cell 21.

[0096] Selectively, a first extension 224 is provided along the third direction Z, extending over the entire first side surface 211g and the entire second sealing portion 213, thereby providing better protection for the main body 211 and the second sealing portion 213, and further increasing the connection strength between the holder 22 and the battery cell 21.

[0097] In some embodiments, when viewed from a direction Z' opposite to the third direction Z, along the first direction X, the first side portion 222 does not extend beyond the first extension portion 224, and a first gap 222a is formed between adjacent first side portions 222. When adjacent battery cell cases 21a are in contact and connected and pressure is applied to each other, the force acting on the first side portion 222 can be reduced, and consequently, the force acting on the first seal portion 212 can be further reduced, which is advantageous for protecting the first seal portion 212, and the first gap 222a is also advantageous for heat dissipation of the battery cell 21.

[0098] In some embodiments, the holder 22 includes a second extension 225 that extends from the second side 223 along a direction Z' opposite to the third direction Z, and the second extension 225 covers the second side 211h and the other second seal 213, thereby protecting the main body 211 and the other second seal 213, and further increasing the connection strength between the holder 22 and the battery cell 21. When viewed from a first direction X, in the second direction Y, a portion of the main body 211 is located between the first extension 224 and the second extension 225. The second extension 225 is connected to the bottom wall 15 and is movably positioned relative to the bottom wall 15, thereby reducing friction with the bottom wall 15 when the main body 211 moves, facilitating movement, protecting the main body 211, and reducing the risk of the main body 211 being damaged and affecting the use of the battery module.

[0099] In some embodiments, the second extension 225 is connected to the bottom wall 15 by contact.

[0100] In some embodiments, a sliding member (not shown) is provided between the second extension portion 225 and the bottom wall 15, and the sliding member reduces the frictional force between the second extension portion 225 and the bottom wall 15, facilitating the movement of the second extension portion 225 relative to the bottom wall 15.

[0101] Selectively, in the third direction Z, a second extension portion 225 is provided on a part of the second side surface 211h and a part of the other second seal portion 213, thereby protecting a part of the main body portion 211 and a part of the other second seal portion 213, increasing the connection strength between the holder 22 and the battery cell 21, and facilitating the integral molding of the holder 22 with the battery cell 21.

[0102] Selectively, in the third direction Z, a second extension 225 is provided on the entirety of the second side surface 211h and the entirety of the other second seal portion 213, thereby better protecting the main body portion 211 and the second seal portion 213, and further increasing the connection strength between the holder 22 and the battery cell 21.

[0103] In some embodiments, when viewed from a direction Z' opposite to the third direction Z, in the first direction X, the second side portion 223 does not extend beyond the second extension portion 225, and a second gap 223a is formed between adjacent second side portions 223. When adjacent battery cell cases 21a are in contact and connected and pressure is applied to each other, the force acting on the second side portion 223 can be reduced, and consequently, the force acting on the first seal portion 212 can be further reduced, which is more advantageous for protecting the first seal portion 212, and the second gap 223a is also advantageous for heat dissipation of the battery cell 21.

[0104] Referring to Figure 15, in some embodiments, the holder 22 includes a second portion 226, which covers a portion of the first wall 211c and protects the main body 211. One end of the first portion 221 is connected to the first side portion 222 and the other end is connected to the second side portion 223, and one end of the second portion 226 is connected to the first side portion 222 and the other end is connected to the second side portion 223, further increasing the structural strength of the holder 22 and providing further advantages in protecting the first seal portion 212. The second portion 226 surrounds the first portion 221, the first side portion 222 and the second side portion 223 to form a first space 20b, and a portion of the first connection portion 212a is located in the first space 20b. The circumferential side of the first connection portion 212a can be protected by the first portion 221, the first side portion 222, the second side portion 223 and the second portion 226. The first space 20b provides an expansion space for the first seal portion 212, reducing the effect of gas generation and / or free electrolyte within the battery cell 21 on the sealing performance of the first seal portion 212, and the first space 20b can further dissipate heat from the battery cell 21.

[0105] In some embodiments, the battery cell 21 contains an electrolyte, which is provided within the battery cell case 21a. The electrode assembly 21b includes a first electrode plate, a separator, and a second electrode plate, which is formed by winding or laminating the first electrode plate, separator, and second electrode plate. A portion of the electrolyte is used to permeate the first electrode plate, separator, and second electrode plate and conduct ions, while a portion of the electrolyte is free and adheres to the surface of the battery cell case 21a and / or the surface of the electrode assembly 21b. The free electrolyte is the free electrolyte. As multiple battery cells 21 cycle through the process, the free electrolyte within the battery cells 21 is pushed out, and the present invention provides an expansion space in the first seal portion 212 by the first space 20b, thereby reducing the effect of the expansion of the battery cells 21 on the sealing performance of the first seal portion 212.

[0106] Referring to Figures 10 to 13, in some embodiments, along a first direction X, the holder 22 includes a first protrusion 210 and a third recess 220, the third recess 220 being provided on a first extension 224, the first protrusion 210 extending from the first extension 224, and when the body portions 211 of adjacent battery cells 21 are in contact and connected, the first protrusion 210 is provided within the third recess 220 of the adjacent holder 22, and a gap exists between the first protrusion 210 and the third recess 220. The third recess 220 and the first protrusion 210 position adjacent holders 22, reducing misalignment of adjacent body portions 211, facilitating the application of pressure between multiple body portions 211, and the gap between the first protrusion 210 and the third recess 220 reduces the force acting on the holder 22, improving the protection of the first seal portion 212 and increasing the connection strength between the holder 22 and the battery cell 21.

[0107] In some embodiments, along a first direction X, the holder 22 includes a second protrusion 230 and a fourth recess 240, the fourth recess 240 being provided on a second extension 225, and the second protrusion 230 extending from the second extension 225. When the bodies of adjacent battery cells 21 are in contact and connected, the second protrusion 230 is provided within the fourth recess 240 of the adjacent holder 22, and a gap exists between the second protrusion 230 and the fourth recess 240. The fourth recess 240 and the second protrusion 230 further reduce misalignment of adjacent body portions 211 by positioning further adjacent holders 22, further facilitating the application of pressure between multiple body portions 211, and the gap between the second protrusion 230 and the fourth recess 240 reduces the force acting on the holder 22, further improving the protection of the first seal portion 212 and further increasing the connection strength between the holder 22 and the battery cell 21.

[0108] In some embodiments, when viewed from a direction Z' opposite to the third direction Z, in the first direction X, the second portion 226 is located between the third wall 211e and the fourth wall 211f. The second portion 226 does not extend beyond the third wall 211e in the first direction X, and the second portion 226 does not extend beyond the fourth wall 211f in the first direction X. When adjacent battery cell cases 21a are in contact and connected, a gap exists between adjacent second portions 226, which reduces the impact of the pressure applied to the second portion 226 between adjacent battery cell cases 21a, reduces the force acting on the first seal portion 212, and is advantageous for protecting the first seal portion 212 and improving the stability of the holder 22's connection to the battery cell 21.

[0109] Referring to Figure 15, in some embodiments, the holder 22 includes a third portion 227, which is connected to the side of the second portion 226 toward the first portion 221. The third portion 227 extends from the second portion 226 along a third direction Z, and the third portion 227 covers a portion of the first connection portion 212a. The third portion 227 can support and protect the portion of the first seal portion 212 that extends from the second portion 226, thereby reducing the risk of damage to the first seal portion 212 affecting the sealing of the battery cell 21.

[0110] Referring to Figures 10 to 16, in some embodiments, the battery cell unit 20a includes two holders 22, one holder 22 connected to a portion of the first seal portion 212, and the other holder 22 connected to a portion of the other first seal portion 212. One electrode terminal 21c extends from the first seal portion 212 and holder 22 along a third direction Z, and the other electrode terminal 21c extends from the second seal portion 213 and holder 22 along a direction opposite to the third direction Z. The two holders 22 enhance protection to the first seal portion 212, provide expansion space to the first seal portion 212, reduce the effect of gas generation and / or free electrolyte within the battery cell 21 on the sealing performance of the first seal portion 212, and are advantageous for heat dissipation of the first seal portion 212.

[0111] Referring to Figures 13 to 16, in some embodiments, the holder 22 includes a fourth portion 228, which is connected to the first portion 221, and at least one electrode terminal 21c is provided on the fourth portion 228. Along the third direction Z, the projection of the electrode terminal 21c overlaps with the projection of the fourth portion 228.

[0112] In some embodiments, the fourth portion 228 and the first portion 221 are positioned along a first direction X, and along a direction opposite to the first direction X, the fourth portion 228 extends from the first portion 221.

[0113] Referring to Figures 21 to 26, in some embodiments, the battery cell assembly 20 includes a first battery cell unit 201 and a second battery cell unit 202, which are installed adjacent to each other along a first direction X. The electrode terminals 21c of the first battery cell unit 201 and the electrode terminals 21c of the second battery cell unit 202 are bent and connected. Along the first direction X, a second space 20c exists between the holder 22 of the first battery cell unit 201 and the holder 22 of the second battery cell unit 202. The fourth portion 228 of the first battery cell unit 201 faces the fourth portion 228 of the second battery cell unit 202, and the fourth portion 228 of the second battery cell unit 202 faces the fourth portion 228 of the first battery cell unit 201.

[0114] Along the third direction Z, the projection of the fourth portion 228 of the first battery cell unit 201 lies within the projection of the second space 20c, and the projection of the fourth portion 228 of the second battery cell unit 202 lies within the projection of the second space 20c.

[0115] In some embodiments, the battery cell assembly 20 includes a third battery cell unit 203, where the second battery cell unit 202 and the third battery cell unit 203 are arranged adjacent to each other along a first direction X. A fourth portion 228 of the third battery cell unit 203 separates from the first portion 221 of the second battery cell unit 202. The electrode terminals 21c of the third battery cell unit 203 are bent to connect to the electrode terminals 21c of the first battery cell unit 201 and / or the electrode terminals 21c of the second battery cell unit 202. The electrode terminals 21c of the first battery cell unit 201 and the electrode terminals 21c of the second battery cell unit 202 are bent along the first direction X, and the electrode terminals 21c of the third battery cell unit 203 are bent along the direction opposite to the first direction X.

[0116] Optionally, the electrode terminals 21c of the third battery cell unit 203 are welded to the electrode terminals 21c of the first battery cell unit 201 and the electrode terminals 21c of the second battery cell unit 202. Optionally, welding includes laser welding, ultrasonic welding, etc.

[0117] Along the third direction Z, the electrode terminals 21c of the first battery cell unit 201, the electrode terminals 21c of the second battery cell unit 202, and the electrode terminals 21c of the third battery cell unit 203 are stacked to form a first stacked portion 20d. Along the third direction Z, the projection of the first stacked portion 20d is located between the projection of the fourth portion 228 of the second battery cell unit 202 and the projection of the fourth portion 228 of the third battery cell unit 203, reducing interference between the fourth portion 228 and the first stacked portion 20d and facilitating welding of the first stacked portion 20d.

[0118] The stacking configuration includes several methods, for example, the electrode terminals 21c of the first battery cell unit 201 are located between the electrode terminals 21c of the second battery cell unit 202 and the electrode terminals 21c of the third battery cell unit 203. For example, the electrode terminals 21c of the second battery cell unit 202 are located between the electrode terminals 21c of the first battery cell unit 201 and the electrode terminals 21c of the third battery cell unit 203. For example, the electrode terminals 21c of the third battery cell unit 203 are located between the electrode terminals 21c of the first battery cell unit 201 and the electrode terminals 21c of the second battery cell unit 202. In some embodiments, along the third direction Z, the projection of the first stacked portion 20d is located between the projection of the fourth portion 228 of the second battery cell unit 202 and the projection of the fourth portion 228 of the third battery cell unit 203 to facilitate welding.

[0119] In some embodiments, along the third direction Z, the projection of the first stacked portion 20d is located between the projection of the first portion 221 of the second battery cell unit 202 and the projection of the first portion 221 of the third battery cell unit 203, further facilitating the welding of the first stacked portion 20d and reducing the impact on the holder 22 during the welding process.

[0120] In some embodiments, along the first direction X, a third space 20e exists between the holder 22 of the third battery cell unit 203 and the holder 22 of the second battery cell unit 202. Along the third direction Z, the projection of the first stacked portion 20d lies within the projection of the third space 20e, further reducing interference between the fourth portion 228 and the first stacked portion 20d and further facilitating welding of the first stacked portion 20d.

[0121] In some embodiments, the battery cell assembly 20 includes a fourth battery cell unit 204, and the third battery cell unit 203 and the fourth battery cell unit 204 are arranged adjacent to each other along a first direction X. The fourth portion 228 of the third battery cell unit 203 faces the fourth portion 228 of the fourth battery cell unit 204, and the fourth portion 228 of the fourth battery cell unit 204 faces the fourth portion 228 of the third battery cell unit 203.

[0122] Along the first direction X, a fourth space 20f exists between the holder 22 of the third battery cell unit 203 and the holder 22 of the fourth battery cell unit 204. Along the third direction Z, the projection of the fourth portion 228 of the third battery cell unit 203 lies within the projection of the fourth space 20f, and the projection of the fourth portion 228 of the fourth battery cell unit 204 lies within the projection of the fourth space 20f. The electrode terminals 21c of the fourth battery cell unit 204 are bent and connected to the first stacked portion 20d, forming an overlapping portion 20g. Optionally, the electrode terminals 21c of the fourth battery cell unit 204 may be located between the electrode terminals 21c in the first stacked portion 20d. Optionally, the electrode terminals 21c of the fourth battery cell unit 204 and the first stacked portion 20d are stacked in sequence.

[0123] In some embodiments, along the third direction Z, the projection of the overlapping portion 20g is located between the projection of the fourth portion 228 of the second battery cell unit 202 and the projection of the fourth portion 228 of the third battery cell unit 203, facilitating the welding of the overlapping portion 20g.

[0124] In some embodiments, along the third direction Z, the projection of the overlapping portion 20g is located between the projection of the first portion 221 of the second battery cell unit 202 and the projection of the first portion 221 of the third battery cell unit 203, further facilitating the welding of the first stacked portion 20d and reducing the impact on the holder 22 during the welding process.

[0125] Selectively, along the third direction Z, the projection of the overlapping portion 20g is located within the projection of the third space 20e, further reducing the interference of the fourth portion 228 with the overlapping portion 20g and further facilitating the welding of the overlapping portion 20g.

[0126] In some embodiments, the electrode terminals 21c of the first battery cell unit 201 and the electrode terminals 21c of the second battery cell unit 202 are connected in parallel to form a first battery cell group, the electrode terminals 21c of the third battery cell unit 203 and the electrode terminals 21c of the fourth battery cell unit 204 are connected in parallel to form a second battery cell group, and the first battery cell group and the second battery cell group are connected in series.

[0127] Referring to Figures 15 and 21-27, in some embodiments, the battery module 100 includes a sampling assembly 40, which includes a lead 41 and a plurality of sampling members 42, the lead 41 being connected to each sampling member 42. Optionally, the sampling member 42 is connected to an electrode terminal 21c. Optionally, the sampling member 42 is connected to a fourth section 228 and an electrode terminal 21c provided on the fourth section 228. The sampling member 42 is fixed to the fourth section 228.

[0128] In some embodiments, the fourth portion 228 includes a third side 228a and a fourth side 228b positioned along the direction opposite to the third direction Z, with the third side 228a being further away from the main body 211 than the fourth side 228b. One side of the sampling member 42 is connected to the fourth side 228b, and the electrode terminal 21c is located between the third side 228a and the sampling member 42.

[0129] In some embodiments, a stepped portion 228c is provided on at least one of the third side surface 228a and the fourth side surface 228b, and the sampling member 42 is connected to the stepped portion 228c, thereby improving the connection strength between the sampling member 42 and the fourth portion 228 and reducing the risk of the sampling member 42 detaching from the fourth portion 228.

[0130] Selectively, a stepped portion 228c is provided on the third side surface 228a and a stepped portion 228c is provided on the fourth side surface 228b, further improving the connection strength between the sampling member 42 and the fourth portion 228 and further reducing the risk of the sampling member 42 detaching from the fourth portion 228.

[0131] In some embodiments, the stepped portion 228c includes a first stepped surface 2281 and a second stepped surface 2282, which are arranged along a second direction Y. Along a third direction Z, the thickness of the first stepped surface 2281 is less than the thickness of the second stepped surface 2282, forming the stepped portion 228c. A portion of the sampling member 42 is connected to the first stepped surface 2281, and a portion is connected to the second stepped surface 2282. Along a third direction Z, the projection of the first stepped surface 2281 overlaps with the projection of the electrode terminal 21c, and the electrode terminal 21c is provided on the first stepped surface 2281. Along a third direction Z, the projection of the second stepped surface 2282 is separated from the projection of the electrode terminal 21c.

[0132] In some embodiments, the first stepped surface 2281 is provided with a first limit portion 2281a, which is formed by a recess in the surface of the first stepped surface 2281. When the sampling member 42 is connected to the fourth portion 228, a portion of the sampling member 42 is provided on the first limit portion 2281a, which restricts the sampling member 42 from detaching from the fourth portion 228 and improves the connection strength between the sampling member 42 and the fourth portion 228.

[0133] In some embodiments, along the third direction Z, the projection of the first limit portion 2281a is separated from the projection of the electrode terminal 21c, which reduces the risk of the sampling member 42 pushing the electrode terminal 21c into the first limit portion 2281a and is advantageous for protecting the electrode terminal 21c.

[0134] In some embodiments, the holder 22 includes two fourth portions 228, which are positioned relative to each other along a second direction Y, making it easier to adjust the positions of the lead 41 and the sampling member 42 and advantageous for spatial arrangement. Along a third direction Z, the projection of the electrode terminal 21c is located between the projections of the first limit portion 2281a of the two fourth portions 228.

[0135] Referring to Figures 4, 6, and 27, in some embodiments, the sampling member 42 includes a first part 421 and a second part 422, where one end of the first part 421 is connected to one end of the second part 422, and the other end of the first part 421 and the other end of the second part 422 are installed separately to form an opening 42a. The first part 421 includes a first segment 421a, and the second part 422 includes a second segment 422a. The first segment 421a is connected to a third side surface 228a, and the second segment 422a is connected to a fourth side surface 228b. Optionally, the first segment 421a is connected to a first stepped surface 2281 on the third side surface 228a, and the second segment 422a is connected to a first stepped surface 2281 on the fourth side surface 228b.

[0136] In some embodiments, the first segment 421a is provided bent toward the second segment 422a, and the first segment 421a is connected to the first stepped surface 2281, which restricts the first segment 421a and can improve the connection strength between the first segment 421a and the stepped portion 228c. The first segment 421a and the second segment 422a form an opening 42a, and the second segment 422a is provided bent toward the first segment 421a, which improves the clamping force between the first segment 421a and the second segment 422a, which is advantageous in improving the connection strength between the sampling member 42 and the fourth portion 228, and consequently, improves the connection strength between the sampling member 42 and the electrode terminal 21c. The free end of the first segment 421a is bent away from the second segment 422a, and the free end of the second segment 422a is bent away from the first segment 421a, which allows the opening 42a to be enlarged and makes it easier to connect the sampling member 42 to the fourth section 228.

[0137] In some embodiments, the first component 421 includes a third segment 421b, which is connected to the first segment 421a. The third segment 421b is provided with a first bend 4211 that is bent toward the first limit section 2281a. When the sampling member 42 is connected to the fourth section 228, the first bend 4211 is provided on the first limit section 2281a and is positioned to restrict the sampling member 42 from detaching from the fourth section 228, thereby improving the connection strength between the sampling member 42 and the fourth section 228.

[0138] The second component 422 includes a fourth segment 422b, which is connected to the second segment 422a. The fourth segment 422b is provided with a second bend 4221 that is bent toward the first limit portion 2281a. When the sampling member 42 is connected to the fourth portion 228, the second bend 4221 is provided on the first limit portion 2281a, and the second bend 4221 is positioned to restrict the sampling member 42 from detaching from the fourth portion 228, thereby further improving the connection strength between the sampling member 42 and the fourth portion 228.

[0139] In some embodiments, the first part 421 and the second part 422 are integrally molded and assembled. For example, they are integrally molded by press working.

[0140] In some embodiments, the sampling member 42 includes a third component 423, which is connected to a first component 421 and / or a second component 422, and the lead 41 is connected to the third component 423, which can increase the connection strength between the lead 41 and the sampling member 42 and facilitate the lead 41 extending out of the sampling member 42.

[0141] In some embodiments, the sampling member 42 can collect electrical signal information from the battery cell 21, which includes, but is not limited to, voltage, current, and temperature.

[0142] Referring to Figures 3 to 5 and Figures 17 to 20, in some embodiments, the elastic member 30 is provided between the front wall 13 and the battery cell assembly 20, and the bent portion 32 is fixed to the top wall 14 and the bottom wall 15. The elastic member 30 can apply pressure to the battery cell assembly 20 and contract in response to the expansion of the battery cell assembly 20 to provide expansion space for the battery cell assembly 20.

[0143] In some embodiments, the elastic member 30 is provided on the side of the battery cell assembly 20 away from the front wall 13, the bent portion 32 is fixed to the top wall 14 and the bottom wall 15, the case 10 and the elastic member 30 form a housing space, and the battery cell assembly 20 is provided in the housing space. The elastic member 30 can apply pressure to the battery cell assembly 20 and contract in response to the expansion of the battery cell assembly 20 to provide expansion space for the battery cell assembly 20.

[0144] In some embodiments, the battery module 100 includes two elastic members 30, one of which is located between the front wall 13 and the battery cell assembly 20, with a bent portion 32 fixed to one side of the top wall 14 and bottom wall 15 along a first direction X. The other elastic member 30 is located on the side of the battery cell assembly 20 away from the front wall 13, with a bent portion 32 fixed to the other side of the top wall 14 and bottom wall 15 along the first direction X. The case 10 and the other elastic member 30 form a housing space, and the battery cell assembly 20 is located in the housing space. The two elastic members 30 can apply further pressure to the battery cell assembly 20 and contract in response to the expansion of the battery cell assembly 20 to provide further expansion space to the battery cell assembly 20, which is advantageous for improving the service life of the battery module.

[0145] In another embodiment, a portion of the bent portion 32 is fixed to the bottom wall 15, and a portion of the bent portion 32 is fixed to the first side wall 11 and the second side wall 12.

[0146] In some embodiments, when the battery cell 21 is not expanding, the elastic member 30 does not apply pressure to the battery cell unit 20a, and when the battery cell 21 expands, the battery cell 21 compresses the elastic member 30, and the elastic member 30 applies pressure to the battery cell 21.

[0147] In some embodiments, when the battery cell 21 is not expanding, the elastic member 30 provides pressure to the battery cell 21, and when the battery cell 21 expands, the battery cell 21 compresses the elastic member 30, and the elastic member 30 provides even more pressure to the battery cell 21.

[0148] In some embodiments, the base 31 is connected to the main body 211 of the outermost battery cell 21. The base 31 is provided with a plurality of projections 311 spaced apart along a third direction Z, and the projections 311 are formed recessed from the side of the base 31 facing the main body 211 toward the main body 211, thereby increasing the structural strength of the base 31 and reducing the risk of deformation of the base 31 caused by uneven application of force to the base 31.

[0149] In some embodiments, the bent portion 32 includes a first bent portion 321 and a second bent portion 322, the first bent portion 321 being positioned relative to the second bent portion 322 along a second direction Y. The first bent portion 321 is connected to one side of the base portion 31, and the second bent portion 322 is connected to the other side of the base portion 31. The first bent portion 321 and the second bent portion 322 can act on the battery cell assembly 20 via the base portion 31, and the first bent portion 321 and the second bent portion 322 can provide expansion space to the battery cell assembly 20.

[0150] In some embodiments, along the third direction Z, the first bent portion 321 is connected to one side of the base portion 31, and the second bent portion 322 is connected to the other side of the base portion 31.

[0151] In some embodiments, the elastic member 30 includes a first connecting segment 323, which is connected to the side of the first bent portion 321 away from the base 31, and the first connecting segment 323 is fixed to the top wall 14, and the first bent portion 321 is fixed to the top wall 14 via the first connecting segment 323, and the force acting on the bent portion 32 can be transmitted to the case 10.

[0152] In some embodiments, the first connecting segment 323 is parallel to the base 31, which is advantageous for the elastic member 30 to deform along the first direction X.

[0153] In some embodiments, the elastic member 30 includes a second connecting segment 324, which is connected to the side of the second bent portion 322 away from the base 31, and the second connecting segment 324 is fixed to the bottom wall 15, and the second bent portion 322 is fixed to the bottom wall 15 via the second connecting segment 324, and the force acting on the bent portion 32 can be transmitted to the case 10.

[0154] In some embodiments, the second connecting segment 324 is parallel to the base 31, which is advantageous for the elastic member 30 to deform along the first direction X.

[0155] In some embodiments, the top wall 14 is provided with a first fixing portion 141, and along a first direction X, the projection of the first connecting segment 323 overlaps with the projection of the first fixing portion 141, and the first connecting segment 323 is fixed to the first fixing portion 141. Examples include welding, adhesive fixing, contact fixing, engagement fixing, screw fixing, etc. Optionally, the top wall 14 is provided with a plurality of first fixing portions 141, which are spaced apart along a third direction Z, and the first connecting segment 323 is fixed to the plurality of first fixing portions 141, thereby improving the connection strength between the first connecting segment 323 and the top wall 14.

[0156] In some embodiments, along the first direction X, first fixing portions 141 are provided on both sides of the top wall 14, and the first connecting segment 323 is fixed to the first fixing portions 141.

[0157] In some embodiments, the first fixing portion 141 is closer to the battery cell assembly 20 than the first connection segment 323, facilitating the fixing of the first fixing portion 141 and the first connection segment 323.

[0158] In some embodiments, the structural strength of the top wall 14 is greater than that of the elastic member 30, reducing the risk of deformation of the top wall 14 due to the force acting on the first bent portion 321.

[0159] In some embodiments, the thickness of the top wall 14 is greater than the thickest of the base 31, the first bent portion 321, and the first connecting segment 323, thereby improving the structural strength of the top wall 14 and reducing the risk of deformation of the top wall 14 due to the forces acting on the first bent portion 321.

[0160] In some embodiments, the bottom wall 15 is provided with a second fixing portion 151, and along a first direction X, the projection of the second connecting segment 324 overlaps with the projection of the second fixing portion 151, and the second connecting segment 324 is fixed to the second fixing portion 151. Examples include welding, adhesive fixing, contact fixing, engagement fixing, screw fixing, etc. Optionally, the bottom wall 15 is provided with a plurality of second fixing portions 151, which are spaced apart along a third direction Z, and the second connecting segment 324 is fixed to the plurality of second fixing portions 151, thereby improving the connection strength between the second connecting segment 324 and the bottom wall 15.

[0161] In some embodiments, along the first direction X, second fixing portions 151 are provided on both sides of the bottom wall 15, and the second connecting segment 324 is fixed to the second fixing portions 151.

[0162] In some embodiments, the second fixing portion 151 is closer to the battery cell assembly 20 than the second connection segment 324, facilitating the fixing of the second fixing portion 151 and the second connection segment 324.

[0163] In some embodiments, the structural strength of the bottom wall 15 is greater than that of the elastic member 30, reducing the risk of deformation of the bottom wall 15 due to the force acting on the second bent portion 322.

[0164] In some embodiments, the thickness of the bottom wall 15 is greater than the thickest of the base 31, the second bent portion 322, and the second connecting segment 324, thereby improving the structural strength of the bottom wall 15 and reducing the risk of deformation of the bottom wall 15 due to the forces acting on the second bent portion 322.

[0165] In some embodiments, the first bend 321 includes a first bend segment 321a and a second bend segment 321b, the first bend segment 321a being connected to the base 31, and the second bend segment 321b being connected to the first bend segment 321a and the first connecting segment 323. The first bend segment 321a and the base 31 form a first angle A1, and the second bend segment 321b and the first connecting segment 323 form a second angle B1, such that A1 ≥ B1, which is advantageous in increasing the ability of the first bend segment 321a to resist deformation and in reducing the risk of the elastic member 30 deforming along a first direction X.

[0166] In some embodiments, the first bent segment 321a and the second bent segment 321b form a third angle C1 such that C1 > A1, which is advantageous in improving the uniform deformation of the first bent portion 321.

[0167] In some embodiments, C1=2B1=2A1, which is advantageous for further improving the uniform deformation of the first bent portion 321.

[0168] In some embodiments, the second bend 322 includes a third bend segment 322a and a fourth bend segment 322b, the third bend segment 322a being connected to the base 31, and the fourth bend segment 322b being connected to the third bend segment 322a and the second connecting segment 324. The third bend segment 322a and the base 31 form a first angle A2, the fourth bend segment 322b and the second connecting segment 324 form a second angle B2, and the third bend segment 322a and the fourth bend segment 322b form a third angle C2. Having A2 ≥ B2 is advantageous in increasing the ability of the third bend segment 322a to resist deformation and reducing the risk of the elastic member 30 deforming along the first direction X.

[0169] In some embodiments, C2 > A2, which is advantageous in improving the uniform deformation of the second bent portion 322.

[0170] In some embodiments, C2 = 2B2 = 2A2, which is advantageous for further improving the uniform deformation of the second bent portion 322.

[0171] In some embodiments, the second bent portion 322 is set to the same angle as the first bent portion 321. When the first bent portion 321 and the second bent portion 322 are subjected to force, they receive the force uniformly and deform uniformly, reducing the risk of the elastic member 30 rotating due to uneven deformation. Selectively, A1=A2, B1=B2, and C1=C2.

[0172] In some embodiments, the battery module 100 includes a first buffer member 101, which is located between an elastic member 30 and the outermost battery cell 21, and the elastic member 30 and the first buffer member 101 are arranged along a first direction X. The first buffer member 101 is in contact with and connected to the base 31 and the body 211 of the outermost battery cell 21. When the battery cell 21 expands, the first buffer member 101 is compressed, providing the battery cell 21 with further expansion space and allowing further pressure to be applied to the battery cell 21. Optionally, the first buffer member 101 includes foamed cotton.

[0173] In some embodiments, the battery module 100 includes a second buffer member 102, which is located between the other elastic member 30 and the other outermost battery cell 21, and the second buffer member 102 and the elastic member 30 are arranged along a first direction X. The second buffer member 102 is in contact with and connected to the base 31 and the body 211 of the outermost battery cell 21. When the battery cell 21 expands, the second buffer member 102 can be compressed to provide the battery cell 21 with further expansion space and to apply further pressure to the battery cell 21. Optionally, the second buffer member 102 includes foamed cotton.

[0174] Referring to Figures 3, 5, 15, 24, 29, and 30, in some embodiments, the battery module 100 includes a first conductive member 50, one end of which is fixed to an elastic member 30. The first conductive member 50 includes a buffer portion 501, which is positioned to be stretched along a first direction X by the elastic member 30 when the battery cell assembly 20 expands, and the buffer portion 501 can buffer the tensile force of the elastic member 30 on the first conductive member 50, which is advantageous for improving the connection strength between the first conductive member 50 and the elastic member 30.

[0175] In some embodiments, the first conductive member 50 is connected to the electrode terminals 21c and is arranged to be used for receiving or outputting electrical energy from the battery cell assembly 20. When the battery cell assembly 20 expands, the buffer 501 reduces the tensile force on the electrode terminals 21c, which is advantageous for protecting the electrode terminals 21c.

[0176] In some embodiments, the buffer portion 501 includes a first bending member 5011 and a second bending member 5012, the first bending member 5011 being connected to the second bending member 5012 to form a first bending angle α, and when the buffer portion 501 is stretched, the first bending angle α gradually increases, which can reduce the force required to stretch the buffer portion 501 and facilitate stretching. Optionally, the buffer portion 501 exhibits a V-shaped structure.

[0177] In some embodiments, the buffer portion 501 includes a third bending member (not shown) connected to the first bending member 5011 and the second bending member 5012 to form a second bending angle and a third bending angle, and when the buffer portion 501 is stretched, the second bending angle and the third bending angle gradually increase, which can improve the stretched length, and the elastic member 30 further buffers the tensile force on the first conductive member 50 and the electrode terminal 21c. Optionally, the buffer portion 501 exhibits a concave structure.

[0178] In some embodiments, the first conductive member 50 includes a first conductive portion 51, a second conductive portion 52, and a third conductive portion 53, and the buffer portion 501 is provided on the first conductive portion 51. The first conductive portion 51 is connected to the third conductive portion 53, the second conductive portion 52 is connected to the third conductive portion 53, and the third conductive portion 53 is fixed to the base 31 of the elastic member 30 near the second buffer member 102. The second conductive portion 52 is connected to the electrode terminal 21c of the battery cell 21 near the second buffer member 102.

[0179] In some embodiments, the first conductive portion 51 is more flexible than the second conductive portion 52. Optionally, the first conductive portion 51 includes a soft copper busbar. Optionally, the soft copper busbar is formed by laminating multiple thin copper busbars, the thickness of which is less than 0.5 mm. Optionally, the second conductive portion 52 includes a hard copper busbar. Optionally, the third conductive portion 53 includes a hard copper busbar, and optionally, the hard copper busbar is integrally molded. Optionally, the second conductive portion 52 and the third conductive portion 53 are integrally molded. The first conductive portion 51 is more flexible and, when the battery cell 21 expands, is more easily stretched, which is advantageous for the movement of the battery cell unit 20a.

[0180] In some embodiments, the first conductive portion 51 and the second conductive portion 52 are welded together, for example, by laser welding.

[0181] In some embodiments, the third conductive portion 53 is provided with a third fixing portion 531, which is fixed to the base 31 of the elastic member 30 near the second buffer member 102. Along the first direction X, the projection of the third fixing portion 531 is separated from the projection of the battery cell case 21a, allowing the first conductive member 50 to be stretched more effectively along the first direction X.

[0182] In some embodiments, along the first direction X, the distance between the buffer portion 501 and the elastic member 30 closest to the second buffer member 102 is smaller than the distance between the buffer portion 501 and the elastic member 30 closest to the first buffer member 101, which is further advantageous for stretching the buffer portion 501.

[0183] In some embodiments, the battery module 100 includes a connection terminal 103, the first conductive member 50 includes a fourth conductive portion 54, the side of the first conductive portion 51 away from the third conductive portion 53 is connected to the fourth conductive portion 54, the fourth conductive portion 54 is connected to the connection terminal 103, and the battery cell assembly 20 is connected to an external device via the connection terminal 103.

[0184] In some embodiments, the first conductive portion 51 includes a flat portion 511, and both ends of the buffer portion 501 are connected to the flat portion 511 along a first direction X. The holder 22 further includes a fourth fixing portion 229, which is connected to the first portion 221, and the first portion 221 and the fourth fixing portion 229 are arranged along a third direction Z, and the flat portion 511 is fixed to the fourth fixing portion 229.

[0185] In some embodiments, the fourth fixing portion 229 includes a first limiting projection 229a and a second limiting projection 229b provided at intervals along the second direction Y, and the flat portion 511 is provided between the first limiting projection 229a and the second limiting projection 229b.

[0186] In some embodiments, the battery module 100 includes a second conductive member 60, one end of which is connected to an electrode terminal 21c of a battery cell 21 near the first buffer member 101, and the other end is fixed to a connection terminal 103, so that the battery cell assembly 20 can receive or output electrical energy through the second conductive member 60. Optionally, the polarity of the electrode terminal 21c to which the first conductive member 50 is connected and the polarity of the electrode terminal 21c to which the second conductive member 60 is connected are opposite.

[0187] In some embodiments, along the third direction Z, the first conductive member 50 and the second conductive member 60 are located on the same side of the battery cell assembly 20, which is advantageous for spatial arrangement.

[0188] In some embodiments, the second conductive member 60 includes a fifth conductive portion 61 and a sixth conductive portion 62, with one end of the fifth conductive portion 61 fixed to the connection end 103 and the other end connected to the sixth conductive portion 62. The sixth conductive portion 62 is fixed to the base 31 of the elastic member 30 near the first buffer member 101, and the sixth conductive portion 62 is connected to the electrode terminal 21c of the battery cell 21 near the first buffer member 101.

[0189] In some embodiments, the sixth conductive portion 62 is a hard copper busbar, and the fifth conductive portion 61 is a soft copper busbar, which is advantageous for connecting the sixth conductive portion 62 to the electrode terminal 21c.

[0190] In some embodiments, the sixth conductive part 62 and the fifth conductive part 61 are welded together, for example, by laser welding.

[0191] Referring to Figures 2 and 5, in some embodiments, the battery module 100 includes a circuit board 70, which is located between the front wall 13 and the elastic member 30. The circuit board 70 is connected to leads 41 and can receive data collected by a sampling member 42. The circuit board 70 includes a BMS component (Battery Management System), which includes a plurality of electronic components that can perform functions such as control, protection, communication, calculation of electrical quantities, signal transmission, and electrical energy transmission for the battery cell 21. Optionally, the circuit board 70 includes a flexible printed circuit board (FPC). Optionally, the circuit board 70 includes a printed circuit board (PCB), which is provided with a plurality of leads (not shown).

[0192] Referring to Figure 31, the present application further provides an electrical device 200 employing the battery module 100 described above. In one embodiment, the electrical device 200 of the present application may be, but is not limited to, an electronic device, a drone, a backup power supply, an electric vehicle, an electric motorcycle, an electric assist bicycle, a power tool, a large household battery storage module, and the like.

[0193] A person ordinary in the art should understand that the above embodiments are for illustrative purposes only and not to limit the present application, and any appropriate modifications and changes to the above embodiments within the substantial spirit of the present application are included within the scope of publication of this application. [Explanation of Symbols]

[0194] 100 Battery Modules 10 cases 11. First side wall 12. Second side wall 13 Front wall 14. Top Wall 141 1st fixed part 15 Bottom wall 151 Second fixed part 20 Battery cell assemblies 20A Battery Cell Unit 20b 1st space 20c 2nd space 20d First layer 20e 3rd space 20f 4th space 20g overlapping portion 201 First battery cell unit 202 Second Battery Cell Unit 203 Third Battery Cell Unit 204 Fourth Battery Cell Unit 21 battery cells 21a Battery Cell Case 21b Electrode Assembly 21c electrode terminal 211 Main body 211c 1st wall 211d 2nd wall 211e 3rd wall 211f 4th wall 211g 1st side 211h 2nd side 211a Case 1 2111 First recess 211b Case 2 2112 Second recess 2113 First Extension Side 2114 Second extension side 212 First seal section 212a First connection section 212b Second connection section 212c Third connection 213 Second seal section 22 holder 221 Part 1 222 First side 222a First gap 223 Second side 223a Second gap 224 1st extension section 225 2nd extension section 226 Part 2 227 Part 3 228 Part 4 228a 3rd side 228b Fourth aspect 228c Step section 2281 1st step surface 2281a 1st limit part 2282 2nd step surface 229 4th fixed part 229a 1st limit convex part 229b 2nd limit convex part 210 First protrusion 220 Third recess 230 Second protrusion 240 Fourth recess 30 Elastic members 31 Base 311 Protrusion 32 Folding section 321 First folding section 321a First folded segment 321b Second Folding Segment 322 Second folding section 323 First Connection Segment 324 Second Connection Segment 101 First buffer member 102 Second buffer member 103 Connection terminal 40 Collection Assembly 41 Reed 42 Sampling members 42a aperture 421 Part 1 421a First segment 421b Third segment 4211 First bending section 422 Part 2 422a Second segment 422b 4th segment 4221 Second bending section 423 Part 3 50 First conductive member 501 Buffer section 5011 First bending member 5012 Second bending member 51 First conductive part 511 Flat area 52 Second conductive part 53 Third conductive part 531 3rd fixed part 54 Fourth conductive part 60 Second conductive member 61 Fifth conductive part 62 Sixth conductive part 70 Circuit boards 200 Electrical equipment X 1st direction Y Second direction Z 3rd direction

Claims

1. The case and A battery cell assembly including battery cell units arranged in a first direction and provided within the case, It comprises an elastic member including a base and a bendable portion, The base is connected to the bent portion, the bent portion is fixed to the case, and in the first direction, the elastic member and the battery cell assembly are arranged and installed. The battery module is characterized in that the base portion is arranged to allow pressure to be applied to the battery cell unit, and the bent portion is arranged to provide an expansion space for the battery cell unit.

2. The aforementioned folded portion includes a first folded portion and a second folded portion. The first bent portion is positioned relative to the second bent portion along the second direction, and the second direction is perpendicular to the first direction. The battery module according to claim 1, characterized in that the first bent portion is connected to one side of the base, and the second bent portion is connected to the other side of the base.

3. The elastic member includes a first connecting segment, The battery module according to claim 2, characterized in that the first connecting segment is connected to the side of the first bent portion away from the base, and the first connecting segment is fixed to the case.

4. The first bent portion includes a first bent segment and a second bent segment, The first folded segment is connected to the base and the second folded segment, The battery module according to claim 3, characterized in that the second bent segment is connected to the first connecting segment.

5. The battery module according to claim 4, characterized in that the first bent segment and the base form a first angle A1, and the second bent segment and the first connecting segment form a second angle B1, and A1 ≥ B1.

6. The battery module according to claim 5, characterized in that the first bent segment and the second bent segment form a third angle C1, and C1 > A1.

7. The battery module according to claim 6, characterized in that C1 = 2A1 = 2B1.

8. The case includes a top wall, and the top wall is provided with a first fixing portion. The battery module according to any one of claims 3 to 6, characterized in that, along the first direction, the projection of the first connecting segment overlaps with the projection of the first fixing portion, and the first connecting segment is fixed to the first fixing portion.

9. The battery module according to claim 8, characterized in that the structural strength of the top wall is greater than the structural strength of the elastic member.

10. The elastic member includes a second connecting segment, The second connecting segment is connected to the side of the second bending portion away from the base, The battery module according to any one of claims 3 to 9, characterized in that the second connection segment is fixed to the case.

11. The case includes a bottom wall, the bottom wall is positioned relative to the top wall along the second direction, The battery module according to claim 10, characterized in that a second fixing portion is provided on the bottom wall, the projection of the second connecting segment along the first direction overlaps with the projection of the second fixing portion, and the second connecting segment is fixed to the second fixing portion.

12. The battery module according to any one of claims 2 to 11, characterized in that the structure of the first bent portion and the second bent portion are the same.

13. The case includes a front wall, and the front wall and the battery cell assembly are provided along the first direction. The battery module according to any one of claims 1 to 12, characterized in that the elastic member is provided between the front wall and the battery cell assembly along the first direction.

14. The battery module includes two elastic members, Along the first direction, one of the elastic members is provided between the front wall and the battery cell assembly, The other elastic member is provided on the side of the battery cell assembly away from the front wall, the case and the elastic member form a housing space, and the battery cell assembly is provided in the housing space, as described in claim 8.

15. The battery module according to any one of claims 1 to 12, characterized in that the case and the elastic member form a housing space, and the battery cell assembly is provided in the housing space.

16. Each of the aforementioned battery cell units includes a battery cell and a holder, The battery cell includes a battery cell case, an electrode assembly provided inside the battery cell case, and electrode terminals connected to the electrode assembly and extending out from the battery cell case. The battery cell case includes a main body and a first sealing portion, the electrode assembly is provided on the main body, the main body includes a first side and a second side arranged along a second direction, and the electrode terminals extend from the first sealing portion. The holder includes a first extension portion, the first extension portion covers at least a portion of the first side surface, The battery module according to any one of claims 1 to 15, characterized in that the first extension is movably arranged with respect to the case along the first direction.

17. The holder includes a second extension, the second extension covers at least a portion of the second side surface, The battery module according to claim 16, characterized in that the second extension is movably arranged with respect to the case along the first direction.

18. The battery module according to any one of claims 16 to 17, characterized in that adjacent main body portions are connected in contact.

19. The battery module according to any one of claims 16 to 18, characterized in that there is mutual pressure between adjacent battery cell cases.

20. The battery module according to any one of claims 16 to 19, characterized in that the holder is integrally molded with the battery cell.

21. The battery module according to any one of claims 16 to 20, characterized in that the holder includes an insulating holder.

22. An electrical device characterized by including a battery module according to any one of claims 1 to 21.

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