Battery modules and electrical equipment

Abstract

This application discloses a battery module and an electrical device. The battery module comprises a plurality of battery cell units arranged along a first direction and a collection module. Each battery cell unit comprises a battery cell and a bracket, the battery cell comprising an electrode assembly, a battery cell case and electrode terminals. The electrode terminals are connected to the electrode assembly and extend out from the battery cell case. The battery cell case comprises a body portion and a first seal portion, the first seal portion comprising a first connection portion, and the electrode terminals extend out of the battery cell case from the first connection portion. The bracket comprises a first portion covering a portion of the first connection portion, and the electrode terminals protrude from the first portion. The collection module comprises a plurality of samplers. At least two electrode terminals and one sampler are stacked and connected. According to this application, stacking and connecting at least two electrode terminals and one sampler reduces the risk of deformation of the electrode terminals and sampler in the stacked portion and is advantageous for the sampler to connect more well to the electrode terminals.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and particularly to battery modules and electrical equipment.

Background Art

[0002] Battery modules are currently widely applied in fields such as drones, electric vehicles, and smart energy storage devices. Since the battery module collects its own information via a circuit board, the assembly process becomes complicated, the cost increases, and it is disadvantageous for production. In addition, under operating conditions such as the expansion of the battery cell, the vibration and dropping of the battery cell, the electrode terminal may be deformed, which affects the use of the battery module.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of these problems, it is necessary for this application to provide a battery module and an electrical equipment that can reduce the number of man-hours, reduce the material cost, and reduce the risk of deformation of the electrode terminal.

Means for Solving the Problems

[0004] An embodiment of this application provides a battery module including a plurality of battery cell units arranged along a first direction and a collection module. Each battery cell unit includes a battery cell and a bracket. The battery cell includes an electrode assembly, a battery cell case, and an electrode terminal. The electrode terminal is connected to the electrode assembly and drawn out from the battery cell case. The battery cell case includes a main body portion and a first sealing portion. The electrode assembly is provided in the main body portion. The first sealing portion includes a first connection portion. The electrode terminal extends out of the battery cell case from the first connection portion. The bracket includes a first portion covering a part of the first connection portion. The electrode terminal protrudes from the first portion. The collection module includes a plurality of samplers. At least two electrode terminals and one sampler are stacked and connected.

[0005] This invention reduces the number of steps and saves material costs by connecting electrode terminals via a sampler for sampling. Furthermore, the first portion covering the first connection improves the toughness of the first connection, which is advantageous for better connection of the sampler to the electrode terminals. Additionally, by laminating and connecting at least two electrode terminals and one sampler, the risk of deformation of the electrode terminals and sampler in the laminated portion is reduced, which is advantageous for better connection of the sampler to the electrode terminals.

[0006] In a selective embodiment of the present invention, the collection module comprises a wire connecting each sampler, thereby facilitating the sampler to collect electrical signal information from the battery cells.

[0007] In a selective embodiment of the present invention, the sampler is welded or press-fitted to at least one of the electrode terminals connected to each other.

[0008] In a selective embodiment of the present invention, the portions of the electrode terminals of two adjacent battery cells protruding from the first portion are stacked and connected to form a stacked region. The main body and the first portion are arranged along a second direction. The projection of the sampler is located within the projection of the stacked region along the second direction. The second direction is perpendicular to the first direction. The increasing thickness of the sampler and the stacked region along the second direction mitigates the force acting on the electrode terminals if they deform. Furthermore, the portion of the stacked region not connected to the sampler deforms before the sampler, thereby protecting the sampler and reducing the risk of the sampler deforming and / or detaching from the stacked region.

[0009] Selectively, in one embodiment of the present invention, the sampler is closer to the battery cell case than to the stacking region along the second direction.

[0010] Selectively, in one embodiment of the present invention, the portion of the electrode terminal extending from the first portion includes a first segment and a second segment. The first segments of the electrode terminals of adjacent battery cells are spaced apart along a first direction. The second segments of the electrode terminals of adjacent battery cells are stacked along a second direction. Along the second direction, the length H of the first segment extending from the first portion is 2 mm ≤ H ≤ 20 mm. When relative displacement occurs between two adjacent battery cells, the electrode terminals are easily deformed in the first, second, and third directions, which is advantageous in reducing the tensile force applied to the stacked region and sampler, and reducing the risk of deformation of the stacked region and sampler.

[0011] Selectively, in certain embodiments of the present invention, H satisfies 3 mm ≤ H ≤ 15 mm, which is advantageous in that the electrode terminals become more easily deformable in the first, second, and third directions, and further reduces the tensile force applied to the electrode terminals.

[0012] In a selective embodiment of the present application, the first seal portion includes a first bend and a second bend. The first bend is connected to the second bend via a first connector. The bracket comprises a first side covering the first bend and a second side covering the second bend. The first and second sides are arranged along a third direction. The first, second, and third directions are orthogonal to each other and protect the first seal portion.

[0013] Selectively, in one embodiment of the present invention, when observed from a first direction, a portion of the first connection is located between the main body and the first portion in the second direction, and a portion of the first connection is located between the first side and the second side in the third direction. This provides an expansion space in the first seal, which is advantageous for pressure relief, reduces the impact of the pressure inside the battery cell on the first connection, reduces the impact on the sealing performance of the first seal, and is advantageous for heat dissipation of the first seal.

[0014] Selectively, in certain embodiments of the present invention, there is pressure between adjacent battery cell cases, which improves the performance of the battery cells.

[0015] In a selective embodiment of the present invention, the bodies of adjacent battery cells are connected in contact, and adjacent battery cells exert pressure on each other through their bodies. This reduces the force acting on the first seal and improves protection of the first seal. Furthermore, it reduces the amount of buffer material that provides expansion space between adjacent battery cells, thereby reducing the occupied space and, consequently, improving the energy density of the battery module.

[0016] In a selective embodiment of the present invention, the battery cell case comprises a first wall, a second wall, a third wall, and a fourth wall. The second wall is positioned opposite the first wall along a second direction. Along the first direction, the third wall is positioned opposite the fourth wall. When viewed from a direction opposite to the second direction, the first portion does not extend beyond the third wall or the fourth wall in the first direction. This reduces the force exerted on the first seal when adjacent battery cell bodies apply pressure to each other, thereby improving protection for the first seal.

[0017] Selectively, in one embodiment of the present invention, the electrode assembly has a wound structure and comprises a first straight stage, a second straight stage, a first curved stage, and a second curved stage. The first straight stage connects the first curved stage and the second curved stage, and the second straight stage connects the first curved stage and the second curved stage. Along the first direction, the projection of the third wall covers the projection of the first straight stage, and the projection of the fourth wall covers the projection of the second straight stage, which is advantageous for pressure relief.

[0018] In a selective embodiment of the present invention, the bracket can be integrally molded with the battery cell, thereby improving the connection strength between the bracket and the battery cell.

[0019] Selectively, in certain embodiments of the present invention, the bracket is an insulating bracket, which can reduce the risk of short-circuiting between the bracket and the battery cell.

[0020] In a selective embodiment of the present invention, the first portion is positioned to surround at least a portion of the electrode terminal, which is advantageous in improving protection to the electrode terminal and increasing its strength.

[0021] In a selective embodiment of the present invention, the sampler is configured to displace in accordance with the deformation of the electrode terminals, and a portion of the conductor is configured to move in accordance with the movement of the sampler. This reduces the risk that the sampler may be pulled by the conductor, causing it to detach from the electrode terminals or the connection with the conductor to be severed.

[0022] Selectively, in one embodiment of the present invention, the first side portion is located between the third and fourth walls in the first direction when viewed from the direction opposite to the second direction. This reduces the force exerted on the first seal portion when adjacent battery cell bodies apply pressure to each other, thereby improving protection for the first seal portion.

[0023] Selectively, in one embodiment of the present invention, the second side is located between the third and fourth walls in the first direction when viewed from a direction opposite to the second direction. This reduces the force exerted on the first seal when adjacent battery cell bodies apply pressure to each other, thereby improving protection for the first seal.

[0024] Selectively, in one embodiment of the present invention, along the second direction, the projection of the first side and the projection of the first curved step overlap, the projection of the first side and the projection of the first straight step separate, and the projection of the first side and the projection of the second straight step separate, which is advantageous for pressure relief.

[0025] Selectively, in one embodiment of the present invention, along the second direction, the projection of the second side and the projection of the second curved step overlap, the projection of the second side and the projection of the first straight step are separated, and the projection of the second side and the projection of the second straight step are separated, which is advantageous for pressure relief.

[0026] Optionally, in certain embodiments of the present application, the bracket includes a first extension portion extending from the first side portion. The first extension portion can protect the fifth wall and the second seal portion, and enhance the connection strength between the bracket and the battery cell.

[0027] Optionally, in certain embodiments of the present application, the bracket includes a second extension portion extending from the second side portion. The second extension portion can protect the sixth wall and another second seal portion, and enhance the connection strength between the bracket and the battery cell, thereby facilitating the integral molding of the bracket to the battery cell.

[0028] Optionally, in certain embodiments of the present application, when observed from the direction opposite to the second direction, the first side portion does not extend beyond the first extension portion in the first direction, and a first gap is formed between adjacent first side portions. When adjacent main body portions are in contact and connected and apply pressure to each other, the acting force received by the first side portion can be reduced, and thus the acting force received by the first seal portion can be reduced, which is beneficial for protecting the first seal portion. Also, the first gap is also beneficial for the heat dissipation of the battery cell.

[0029] Optionally, in certain embodiments of the present application, when observed from the direction opposite to the second direction, the second side portion does not extend beyond the second extension portion in the first direction, and a second gap is formed between adjacent second side portions. When adjacent main body portions are in contact and connected and apply pressure to each other, the acting force received by the second side portion can be reduced by the second gap, and thus the acting force received by the first seal portion can be further reduced, which is more beneficial for protecting the first seal portion. Also, the second gap is also beneficial for the heat dissipation of the battery cell.

[0030] Selectively, in certain embodiments of the present invention, the battery module further comprises an elastic member. The elastic member comprises a base, a third bend, and a fourth bend, the third bend being connected to the fourth bend via the base. The base is configured to provide pressure to the battery cell unit, and the third and fourth bends are configured to provide expansion space to the battery cell unit. This buffers the pressurizing force applied to the battery cell unit, reducing its impact on the battery module's lifespan. Furthermore, by continuously applying pressure to the battery cell unit with the base, the battery cell unit is held under pressure and maintains dynamic equilibrium, which is advantageous for improving the battery module's lifespan.

[0031] In a selective embodiment of the present invention, the elastic member comprises a first connecting step. The first connecting step is connected to the side of the third bend away from the base and is fixed to the case, thereby transmitting the force acting on the third bend to the housing.

[0032] In a selective embodiment of the present invention, the first connecting step is parallel to the base, which is advantageous for the elastic member to deform in the first direction.

[0033] In a selective embodiment of the present invention, the third bent portion comprises a first bent step and a second bent step. The first bent step connects the base to the second bent step, and the second bent step connects the first connecting step.

[0034] Selectively, in certain embodiments of the present invention, the first bent step and the base form a first angle A1, the second bent step and the first connecting step form a second angle B1, and A1 ≥ B1. This is advantageous in increasing the deformation resistance of the first bent step and in reducing the risk of the elastic member deforming in the first direction.

[0035] Selectively, in certain embodiments of the present invention, the first and second bends form a third angle C1, and C1 > A1. This is advantageous in promoting uniform deformation of the third bend.

[0036] Selectively, in certain embodiments of the present invention, C1 = 2A1 = 2B1. This is advantageous in further promoting uniform deformation of the third bent portion.

[0037] In a selective embodiment of the present invention, the housing comprises a first side wall on which a first fixing portion is provided. The projection of the first connecting step and the projection of the first fixing portion overlap along a first direction. The first connecting step is fixed to the first fixing portion, thereby enabling the force acting on the bent portion to be transmitted to the first side wall.

[0038] Selectively, in certain embodiments of the present invention, the structural strength of the first sidewall is greater than that of the elastic member, thereby reducing the risk of deformation of the first sidewall due to the force acting on the third bent portion.

[0039] In a selective embodiment of the present invention, the elastic member comprises a second connecting step connected to the side of the fourth bend away from the base. The second connecting step is fixed to the housing, thereby transmitting the force acting on the fourth bend to the housing.

[0040] In a selective embodiment of the present invention, the second connecting stage is parallel to the base, which is advantageous for the elastic member to deform in the first direction.

[0041] Selectively, in certain embodiments of the present invention, cabinet It has a bottom wall on which a third fixing part is provided. The projection of the second connecting stage and the projection of the third fixing part overlap along the first direction. The second connecting stage is fixed to the third fixing part, thereby enabling the force acting on the bent portion to be transmitted to the bottom wall.

[0042] In a selective embodiment of the present invention, the structural strength of the bottom wall is greater than that of the elastic member, thereby reducing the risk of deformation of the bottom wall due to the force acting on the fourth bent portion.

[0043] Selectively, in one embodiment of the present invention, the structures of the third and fourth bent portions are identical, which is advantageous for uniformizing the force received and the deformation.

[0044] One embodiment of the present application further provides an electrical device including a battery module in any of the embodiments described above. [Brief explanation of the drawing]

[0045] [Figure 1] This is a schematic diagram showing the structure of a battery module in one embodiment. [Figure 2] This shows a schematic diagram of a battery module in one embodiment. [Figure 3] This is a schematic diagram showing the structure of a battery module in one embodiment. [Figure 4] This is a schematic diagram showing a partial structure of a battery module from a different perspective in one embodiment. [Figure 5] This is a schematic diagram showing the structure of multiple battery cell units in one embodiment. [Figure 6] This is a schematic diagram showing the structure of a battery cell in one embodiment. [Figure 7] This is a schematic diagram showing the structure of a battery cell as observed from direction Y', opposite to the second direction Y, in one embodiment. [Figure 8] A schematic diagram of a battery cell in one embodiment is shown. [Figure 9] This is a schematic diagram showing the structure of a battery cell in another embodiment. [Figure 10] This is a schematic diagram showing the structure of a battery cell in yet another embodiment. [Figure 11] This is a schematic diagram showing the structure of an electrode assembly in one embodiment. [Figure 12] This is a schematic diagram showing the structure of a battery cell and bracket in one embodiment. [Figure 13] This is a schematic diagram showing the structure of a battery cell and bracket from a different perspective in one embodiment. [Figure 14] This is a schematic diagram showing the structure of a battery cell and bracket from a different perspective in one embodiment. [Figure 15]This is a schematic diagram showing the structure of a battery cell and bracket as observed from direction Y', opposite to the second direction Y, in one embodiment. [Figure 16] Figure 12 is a schematic diagram showing the structure of a part of the battery cell and bracket. [Figure 17] Figure 12 is a schematic diagram showing the structure of another part of the battery cell and bracket. [Figure 18] This diagram shows a schematic structure in which the electrode terminals of two battery cells are stacked and connected in one embodiment. [Figure 19] Figure 18 is a schematic diagram showing a structure in which two battery cells are displaced along the first direction X. [Figure 20] Figure 18 is a schematic diagram showing a structure in which two battery cells are displaced along the second direction Y. [Figure 21] Figure 20 shows a partially enlarged schematic diagram of the structure shown. [Figure 22] This is a schematic diagram showing the structure of an elastic member in one embodiment. [Figure 23] This is a schematic diagram showing the structure of a part of a case in one embodiment. [Figure 24] This is a schematic diagram showing the structure of an electrical device in one embodiment. [Modes for carrying out the invention]

[0046] The following specific embodiments will be described in more detail with reference to the above drawings.

[0047] The following specific embodiments are illustrative and not limiting. They are intended to provide a basic understanding of the Application and are not intended to identify any important or definitive elements of the Application or to limit its scope of protection. Unless there is a structural conflict, each technical feature described in each embodiment can be combined in any manner.

[0048] When one component is considered to be "attached" to another component, it may be directly attached to the other component, or another component may be present in between. When one component is considered to be "connected" to another component, it may be directly connected to the other component, or another component may be present in between.

[0049] It is understood that the terms "orthogonal" and "equal" are used to describe an ideal state between two components. In actual production or use, a state of orthogonality or near-equality may exist between two components. For example, when combined with numerical descriptions, "orthogonal" means that the angular range between two straight lines is 90° ± 10°, that the dihedral angle range between two planes is 90° ± 10°, and that the angular range between a straight line and a plane is 90° ± 10°. Two components described as "orthogonal" do not have to be absolute straight lines or planes; they may be approximately straight lines or planes, and if macroscopically the overall direction of extension is a straight line or plane, then those components can be considered "straight lines" or "planes."

[0050] The term "parallel" is used to describe an ideal state between two components. In actual production or use, a near-parallel state may exist between two components. For example, when combined with numerical descriptions, "parallel" means that the angular range between two straight lines is 180° ± 10°, that the dihedral angle range between two planes is 180° ± 10°, and that the angular range between a straight line and a plane is 180° ± 10°. Two components described as "parallel" do not have to be absolute straight lines or planes; they may be approximately straight lines or planes, and if macroscopically the overall extension direction is a straight line or plane, then the components can be considered "straight lines" or "planes."

[0051] Unless otherwise specified, the term "multiple" in the specification, when describing the quantity of a component, specifically refers to two or more such components.

[0052] In the first direction X, this includes the first direction X and the direction opposite to the first direction X; in the second direction Y, this includes the second direction Y and the direction opposite to the second direction Y; and in the third direction Z, this includes the third direction Z and the direction opposite to the third direction Z.

[0053] For the sake of explanation, the electrode terminal 11c in some of the drawings is shown in an unbent state.

[0054] Referring to Figures 1 to 6 and Figure 18, one embodiment of the present invention provides a battery module 100 comprising a plurality of battery cell units 10 and a collection module 20, wherein the plurality of battery cell units 10 are arranged along a first direction X, and each battery cell unit 10 comprises a battery cell 11 and a bracket 12, the bracket 12 being connected to the battery cell 11. The battery cell 11 comprises a battery cell case 11a, an electrode assembly 11b, and an electrode terminal 11c connected to the electrode assembly 11b and extending from the battery cell case 11a.

[0055] The battery cell case 11a comprises a main body portion 111 and a first sealing portion 112, and the electrode assembly 11b is provided on the main body portion 111. The first sealing portion 112 includes a first connecting portion 112a, and the electrode terminal 11c extends from the first connecting portion 112a to the outside of the battery cell case 11a. The bracket 12 comprises a first portion 121, which covers a part of the first connecting portion 112a, and the electrode terminal 11c protrudes from the first portion 121.

[0056] The collection module 20 comprises multiple samplers 21, and at least two electrode terminals 11c and one sampler 21 are stacked and connected.

[0057] This invention reduces the number of steps and saves material costs by connecting the electrode terminals 11c via the sampler 21 to perform sampling. Furthermore, the first portion 121 covers the first connection portion 112a, improving the toughness of the first connection portion 112a. By laminating and connecting at least two electrode terminals 11c and one sampler 21, the risk of deformation of the laminated portion of the electrode terminals 11c and sampler 21 is reduced, which is advantageous for the sampler 21 to be better connected to the electrode terminals 11c.

[0058] In one embodiment, the electrode terminals 11c of two adjacent battery cells 11 are stacked and connected to each other, and the sampler 21 is connected to one of the electrode terminals 11c that are connected to each other.

[0059] In one embodiment, the electrode terminals 11c of three battery cells 11 are stacked and connected to each other, and the sampler 21 is connected to any one of the connected electrode terminals 11c.

[0060] In one embodiment, the sampler 21 can collect electrical signal information from the battery cell 11, which includes, but is not limited to, voltage, current, and temperature.

[0061] In one embodiment, the collection module 20 is equipped with a wire 22, which connects each sampler 21.

[0062] In one embodiment, the sampler 21 is configured to displace in accordance with the deformation of the electrode terminal 11c, and a portion of the conductor 22 is configured to provide displacement space for the sampler 21. When the electrode terminal 11c deforms, it moves along with the sampler 21, and a portion of the conductor 22 moves along with the movement of the sampler 21, reducing the risk that the sampler 21 may be pulled by the conductor 22 and detached from the electrode terminal 11c, or that the connection between the sampler 21 and the conductor 22 may be severed.

[0063] In one embodiment, the sampler 21 is welded or press-fitted to at least one of the electrode terminals 11c that are connected to each other. For example, laser welding may be used.

[0064] In one embodiment, the main body 111 and the first portion 121 are arranged along the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0065] In one embodiment, the electrode terminals 11c of two adjacent battery cells 11 are stacked and connected along a second direction Y.

[0066] In one embodiment, the electrode terminals 11c of N battery cells 11 are stacked and connected along a second direction Y, where N ≥ 3.

[0067] In one embodiment, the sampler 21 is fixed to the first part 121 and connected to the electrode terminal 11c. Selectively, the first part 121 is provided with a recess (not shown), and the sampler 21 is connected to the recess.

[0068] In one embodiment, along the second direction Y, the projections of the electrode terminals 11c of two adjacent battery cells 11 overlap. The electrode terminals 11c of the two adjacent battery cells 11 are bent and then stacked and connected to form a stacked region 101. The electrode terminals 11c of the two adjacent battery cells 11 are connected by welding after bending. For example, laser welding is employed.

[0069] In one embodiment, the electrode terminals 11c and the sampler 21 are first stacked in sequence. The stacked region 101 and the portion where the sampler 21 is not stacked are welded first, and then the stacked region 101 and the portion where the sampler 21 is stacked are welded. Here, the laser welding energy in the second welding is greater than the laser welding energy in the first welding.

[0070] In one embodiment, the electrode terminals 11c and the sampler 21 are first stacked in sequence, and the portion where the stacked region 101 and the sampler 21 are stacked is welded first, and then the portion where the stacked region 101 and the sampler 21 are not stacked is welded. Here, the laser welding energy in the second welding is smaller than the laser welding energy in the first welding.

[0071] In one embodiment, along the second direction Y, the projection of the sampler 21 is located within the projection of the lamination region 101. By increasing the thickness of the sampler 21 and the lamination region 101 along the second direction Y, the force acting on the electrode terminal 11c when it deforms can be mitigated. In addition, the portion of the lamination region 101 not connected to the sampler 21 deforms before the sampler 21, thereby protecting the sampler 21 and reducing the risk of the sampler 21 deforming and / or detaching from the lamination region 101.

[0072] In one embodiment, along the second direction Y, the sampler 21 is closer to the battery cell case 11a than to the stacking region 101.

[0073] In one embodiment, the stacked region 101 and a portion of the sampler 21 are arranged along the second direction Y. In one embodiment, along the second direction Y, the sampler 21 is located between two stacked electrode terminals 11c.

[0074] In one embodiment, the electrode terminals 11c and sampler 21, which are connected to each other, are arranged in a stack in a first direction X. Selectively, the sampler 21 is located between the electrode terminals 11c. Selectively, the sampler 21 is located on the leftmost side of the stack. Selectively, the sampler 21 is located on the rightmost side of the stack.

[0075] In one embodiment, the bracket 12 is integrally molded with the battery cell 11, thereby improving the connection strength between the bracket 12 and the battery cell 11. Selectively, the bracket 12 is integrally molded with the battery cell 11 by low-pressure injection molding.

[0076] In one embodiment, an insulating material, such as an insulating film, is provided on the outer surface of the main body 111, thereby providing better protection for the main body.

[0077] In one embodiment, the bracket 12 is an insulating bracket, which reduces the risk of a short circuit between the bracket 12 and the battery cell 11.

[0078] Referring to Figures 6 to 10, in one embodiment, the main body 111 is provided with a housing space, and the main body 111 comprises a first case 1111 and a second case 1112, the first case 1111 is provided with a first recess 1111a, and the second case 1112 is provided with a second recess 1112a. The first case 1111 is connected to the second case 1112 to form a housing space, a part of the electrode assembly 11b is provided in the first recess 1111a, and another part is provided in the second recess 1112a. The periphery of the first case 1111 extends outward to form a first extension edge 1113, and the periphery of the second case 1112 extends outward to form a second extension edge 1114. With the first case 1111 connected to the second case 1112, the first extension edge 1113 and the second extension edge 1114 are superimposed and sealed together.

[0079] In one embodiment, the first extension 1113 and the second extension 1114 overlap and are sealed together to form two first seal portions 112 and two second seal portions 113. The two first seal portions 112 are arranged along a second direction Y, and the two second seal portions 113 are arranged along a third direction Z. Here, one first seal portion 112 is connected to the two second seal portions 113, and the other first seal portion 112 is also connected to the two second seal portions 113.

[0080] In one embodiment, the main body 111 comprises a first wall 111a, a second wall 111b, a third wall 111c, and a fourth wall 111d. The second wall 111b and the first wall 111a are arranged opposite each other along a second direction Y, and the third wall 111c and the fourth wall 111d are arranged opposite each other along a first direction X. Here, one first seal portion 112 is connected to the first wall 111a, and the other first seal portion 112 is connected to the second wall 111b.

[0081] The main body 111 includes a fifth wall 111e and a sixth wall 111f arranged opposite to each other along the third direction Z. Of the two second seal portions 113, one is connected to the fifth wall 111e and the other is connected to the sixth wall 111f.

[0082] In one embodiment, the battery cell 11 is provided with two electrode terminals 11c, one electrode terminal 11c extending out of the battery cell case 11a from one first seal portion 112, and the other electrode terminal 11c extending out of the battery cell case 11a from the other first seal portion 112.

[0083] Referring to Figures 9 and 10, in one embodiment, the battery cell 11 comprises two electrode terminals 11c and one first seal portion 112, the two electrode terminals 11c extending from the first seal portion 112 to the outside of the battery cell case 11a.

[0084] In one embodiment, the battery cell 11 includes two electrode terminals 11c and two first sealing portions 112, the two electrode terminals 11c extending out of the battery cell case 11a from the same first sealing portion 112.

[0085] Referring to Figures 6 to 8, in one embodiment, the main body 111 comprises two first walls 111a, two second walls 111b, and two first sealing portions 112. One first wall 111a is connected to a third wall 111c and one first sealing portion 112, the other first wall 111a is connected to a fourth wall 111d and one first sealing portion 112, one second wall 111b is connected to a third wall 111c and the other first sealing portion 112, and the other second wall 111b is connected to a fourth wall 111d and the other first sealing portion 112. One electrode terminal 11c extends outside the battery cell case 11a from one first sealing portion 112, and the other electrode terminal 11c extends outside the battery cell case 11a from the other first sealing portion 112.

[0086] The two first walls 111a are located on opposite sides of the first seal portion 112 in the first direction X when observed from direction Y' opposite to the second direction Y. The two second walls 111b are located on opposite sides of the other first seal portion 112 in the first direction X when observed from the second direction Y.

[0087] In one embodiment, the main body 111 comprises one first wall 111a, one second wall 111b, and two first seal portions 112. The first wall 111a is connected to a third wall 111c and one of the first seal portions 112, and the second wall 111b is connected to the third wall 111c and the other first seal portion 112. The main body 111 is provided with a housing space, and the main body 111 comprises a first case 1111 and a second case 1112, the first case 1111 is provided with a first recess 1111a, and the second case 1112 is flat. The first case 1111 is connected to the second case 1112 to form the housing space, and the electrode assembly 11b is provided in the first recess 1111a. One electrode terminal 11c extends outside the battery cell case 11a from one first seal portion 112, and the other electrode terminal 11c extends outside the battery cell case 11a from the other first seal portion 112.

[0088] In one embodiment, the main body 111 comprises two first walls 111a, a second wall 111b, and a first sealing portion 112. The main body 111 is provided with a housing space, and the main body 111 comprises a first case 1111 and a second case 1112. The first case 1111 is connected to the second case 1112, and the first case 1111 is provided with a first recess 1111a, and the second case 1112 is provided with a second recess 1112a, thereby forming the housing space. The electrode assembly 11b is provided in the first recess 1111a and the second recess 1112a. The two electrode terminals 11c extend outside the battery cell case 11a from the same first sealing portion 112.

[0089] Selectively, there is one second wall 111b and one first seal portion 112. One first wall 111a is connected to the third wall 111c and the first seal portion 112, and the other first wall 111a is connected to the fourth wall 111d and the first seal portion 112. The two first walls 111a are located on opposite sides of the first seal portion 112 in the first direction X when viewed from direction Y' opposite to the second direction Y.

[0090] Selectively, there are two second walls 111b and two first seal portions 112. One first wall 111a is connected to the third wall 111c and one first seal portion 112, and the other first wall 111a is connected to the fourth wall 111d and one first seal portion 112. The two first walls 111a are located on opposite sides of the first seal portion 112 in the first direction X when viewed from direction Y' opposite to the second direction Y. Place One second wall 111b is connected to the third wall 111c and the other first seal portion 112, and the other second wall 111b is connected to the fourth wall 111d and the other first seal portion 112. When observed from the second direction Y, the two second walls 111b are located on opposite sides of the first seal portion 112 in the first direction X.

[0091] Referring to Figure 10, in one embodiment, the main body 111 comprises one first wall 111a, one second wall 111b, and one first seal portion 112. The main body 111 is provided with a housing space, and the main body 111 comprises a first case 1111 and a second case 1112, the first case 1111 is provided with a first recess 1111a, and the second case 1112 is flat. The first case 1111 is connected to the second case 1112 to form the housing space. The electrode assembly 11b is provided in the first recess 1111a. Two electrode terminals 11c extend out of the battery cell case 11a from the same first seal portion 112.

[0092] Selectively, there is one first seal portion 112, the first wall 111a is connected to the third wall 111c and the first seal portion 112, and the second wall 111b is connected to the third wall 111c.

[0093] Selectively, there are two first seal portions 112, with a first wall 111a connected to a third wall 111c and one of the first seal portions 112, and a second wall 111b connected to the third wall 111c and the other first seal portion 112.

[0094] Referring to Figures 5 and 18, in one embodiment, the portion of the electrode terminal 11c extending from the first portion 121 comprises a first segment 102 and a second segment 103. The first segment 102 of the electrode terminal 11c of adjacent battery cells 11 is spaced apart along the first direction X, and the second segment 103 of the electrode terminal 11c of adjacent battery cells 11 is stacked along the second direction Y. In the second direction Y, the length H of the first segment 102 extending from the first portion 121 satisfies 2 mm ≤ H ≤ 20 mm. When relative displacement occurs between two adjacent battery cells 11, the electrode terminal 11c is easily deformed in the first direction X, the second direction Y, and the third direction Z, which is advantageous in reducing the tensile force applied to the stacked region 101 and the sampler 21, and reducing the risk of deformation of the stacked region 101 and the sampler 21. H can be any of the following: 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm.

[0095] In one embodiment, H satisfies 3 mm ≤ H ≤ 15 mm, which is advantageous in that the electrode terminal 11c becomes more easily deformable in the first direction X, the second direction Y, and the third direction Z, and further reduces the tensile force applied to the electrode terminal 11c.

[0096] In one embodiment, the first portion 121 is positioned to surround the outer surface of the electrode terminal 11c, which is advantageous in improving protection to the electrode terminal 11c and increasing the strength of the electrode terminal 11c.

[0097] Referring to Figures 18 and 19, in one embodiment, when the battery cell 11 is displaced in a first direction X, at least one of the two first segments 102 of adjacent electrode terminals 11c deforms, causing the stacked region 101 and sampler 21, formed by a portion of the two second segments 103, to displace toward the main body 111. The deformation of the electrode terminals 11c reduces the tensile force applied to the stacked region 101 and sampler 21 as the battery cell 11 displaces along the first direction X, thereby reducing the risk of deformation of the stacked region 101 and sampler 21.

[0098] Referring to Figures 18, 20, and 21, in one embodiment, when the battery cell 11 is displaced in the second direction Y, the stacked region 101 and sampler 21, formed by parts of the two second segments 103, are positioned at an angle to the main body 111. The deformation of the electrode terminals 11c reduces the tensile force applied to the stacked region 101 and sampler 21 as the battery cell 11 is displaced along the second direction Y, thereby reducing the risk of deformation of the stacked region 101 and sampler 21.

[0099] In one embodiment, when the battery cell 11 is displaced in the second direction Y, the first segment 102 and the second segment 103 of the electrode terminal 11c of one battery cell 11 form an acute angle α, while the first segment 102 and the second segment 103 of the electrode terminal 11c of the other battery cell 11 form an obtuse angle β.

[0100] In one embodiment, when a battery cell 11 is displaced along a second direction Y, the height of one battery cell 11 in the second direction Y becomes higher than that of the other battery cell 11. The deformation of the first segment 102 of the electrode terminal 11c of the battery cell 11 at the higher position further reduces the tensile force applied to the electrode terminal 11c as the battery cell 11 is displaced along the second direction Y.

[0101] Referring to Figure 18, in one embodiment, when the battery cell 11 is displaced in the third direction Z, the non-stacked portions of the first segment 102 and the second segment 103 of the electrode terminal 11c of one battery cell 11 partially rotate along the third direction Z, and the non-stacked portions of the first segment 102 and the second segment 103 of the electrode terminal 11c of the other battery cell 11 partially rotate along the direction Z' opposite to the third direction Z. The deformation of the electrode terminal 11c reduces the tensile force applied to the stacked region 101 and the sampler 21 as the battery cell 11 is displaced along the second direction Y, thereby reducing the risk of deformation of the stacked region 101 and the sampler 21.

[0102] To make it clear, when the battery cell 11 is subjected to operating conditions such as swelling, vibration, or dropping, the battery cell 11 may be displaced in one direction or in multiple directions.

[0103] Referring to Figures 6 and 11, in one embodiment, the electrode assembly 11b has a winding structure and comprises a first straight stage 1116, a second straight stage 1117, a first curved stage 1118, and a second curved stage 1119. The first straight stage 1116 connects the first curved stage 1118 and the second curved stage 1119, and the second straight stage 1117 connects the first curved stage 1118 and the second curved stage 1119. Along the first direction X, the projection of the third wall 111c covers the projection of the first straight stage 1116, and the projection of the fourth wall 111d covers the projection of the first straight stage 1116. stomach The projection of the third wall 111c covers the projection of the second linear stage 1117, and the projection of the fourth wall 111d covers the projection of the second linear stage 1117. This is advantageous for applying uniform pressure between the battery cells 11, and can further extend the service life of the battery cells 11.

[0104] In one embodiment, the first sealing portion 112 comprises a first bent portion 112b and a second bent portion 112c, the first bent portion 112b and the second bent portion 112c being arranged opposite each other along a third direction Z. The first bent portion 112b is connected to the second bent portion 112c via a first connecting portion 112a.

[0105] In one embodiment, when viewed from direction Y' opposite to the second direction Y, the first portion 121 does not extend beyond the third wall 111c and the fourth wall 111d in the first direction X. This reduces the force exerted on the first seal portion 112 when the main bodies 111 of adjacent battery cells 11 apply pressure to each other, thereby improving protection for the first seal portion 112.

[0106] In one embodiment, the bracket 12 comprises a first side portion 122 and a second side portion 123. One end of the first portion 121 is connected to the first side portion 122, and the other end is connected to the second side portion 123, thereby increasing the structural strength of the bracket 12. The first side portion 122 covers the first bent portion 112b, and the second side portion 123 covers the second bent portion 112c, thereby providing protection to the first seal portion 112.

[0107] In one embodiment, the first side portion 122 is located between the third wall 111c and the fourth wall 111d in the first direction X when viewed from a direction Y' opposite to the second direction Y. This reduces the force exerted on the first seal portion 112 when the main bodies 111 of adjacent battery cells 11 exert pressure on each other, thereby improving protection for the first seal portion 112.

[0108] In one embodiment, the second side portion 123 is located between the third wall 111c and the fourth wall 111d in the first direction X when viewed from a direction Y' opposite to the second direction Y. This reduces the force exerted on the first seal portion 112 when the main bodies 111 of adjacent battery cells 11 exert pressure on each other, thereby improving protection for the first seal portion 112.

[0109] In one embodiment, in the second direction Y, the projection of the first side portion 122 and the projection of the first curved step 1118 overlap, the projection of the first side portion 122 and the projection of the first straight step 1116 are separated, and the projection of the first side portion 122 and the projection of the second straight step 1117 are separated. This is advantageous for pressure relief.

[0110] In one embodiment, in the second direction Y, the projection of the second side portion 123 and the projection of the second curved step 1119 overlap, the projection of the second side portion 123 and the projection of the first straight step 1116 are separated, and the projection of the second side portion 123 and the projection of the second straight step 1117 are separated. This is advantageous for pressure relief.

[0111] In one embodiment, the bracket 12 includes a second connecting portion 124 that covers at least a portion of the first wall 111a. One end of the second connecting portion 124 is connected to the first side portion 122, and the other end is connected to the second side portion 123, which can further increase the structural strength of the bracket 12. When viewed from direction Y' opposite to the second direction Y, the second connecting portion 124 does not extend beyond the third wall 111c and does not extend beyond the fourth wall 111d in the first direction X.

[0112] The main bodies 111 of adjacent battery cells 11 can be in contact and connected, and by applying pressure to each other through the main bodies 111, the force on the first seal portion 112 is reduced, improving protection to the first seal portion 112, reducing the amount of buffer material needed to provide expansion space between adjacent battery cells 11, thereby reducing the occupied space and, consequently, improving the energy density of the battery module 100.

[0113] In one embodiment, pressure is applied between adjacent battery cell cases 11a, improving the performance of the core 11.

[0114] In one embodiment, the bracket 12 includes a first extension 125 extending from the first side portion 122. The first extension 125 protects the fifth wall 111e and the second sealing portion 113, and can increase the connection strength between the bracket 12 and the battery cell 11.

[0115] Selectively, in the second direction Y, a first extension 125 is provided on a portion of the fifth wall 111e and a portion of the second sealing portion 113. This protects a portion of the main body 111 and a portion of the second sealing portion 113, increases the connection strength between the bracket 12 and the battery cell 11, and facilitates integral molding of the bracket 12 with the battery cell 11.

[0116] Selectively, in the second direction Y, the first extension 125 is provided on the entire fifth wall 111e and the entire second sealing portion 113. This provides better protection for the main body 111 and the second sealing portion 113 and further increases the connection strength between the bracket 12 and the battery cell 11.

[0117] In one embodiment, when observed from direction Y' opposite to the second direction Y, the first side portion 122 does not exceed the first extension portion 125 in the first direction X, and a first gap 122a is formed between adjacent first side portions 122. When adjacent main body portions 111 are in contact and connected and pressure is applied to each other, the force acting on the first side portion 122 can be reduced, and consequently, the force acting on the first seal portion 112 can be reduced, which is advantageous for protecting the first seal portion 112, and the first gap 122a is also advantageous for heat dissipation of the battery cell 11.

[0118] In one embodiment, the bracket 12 includes a second extension 126 extending from a second side portion 123. The second extension 126 protects the sixth wall 111f and another second sealing portion 113, can increase the connection strength between the bracket 12 and the battery cell 11, and facilitates integral molding of the bracket 12 with the battery cell 11.

[0119] Selectively, in the second direction Y, a second extension 126 is provided on a portion of the sixth wall 111f and a portion of another second seal portion 113. This protects a portion of the main body 111 and a portion of the second seal portion 113, increases the connection strength between the bracket 12 and the battery cell 11, and facilitates integral molding of the bracket 12 with the battery cell 11.

[0120] Selectively, in the second direction Y, the entirety of the sixth wall 111f and the entirety of another second seal portion 113 are provided with a second extension portion 126. This allows for better protection of the main body portion 111 and the second seal portion 113, and further enhances the connection strength between the bracket 12 and the battery cell 11.

[0121] In one embodiment, when observed from direction Y' opposite to the second direction Y, the second side portion 123 does not exceed the second extension portion 126 in the first direction X, and a second gap 123a is formed between adjacent second side portions 123. When adjacent main body portions 111 are in contact and connected and pressure is applied to each other, the second gap 123a can reduce the force acting on the second side portion 123, thereby further reducing the force acting on the first seal portion 112, which is more advantageous for protecting the first seal portion 112, and the second gap 123a is also advantageous for heat dissipation of the battery cell 11.

[0122] In one embodiment, a portion of the first connection portion 112a is located between the main body portion 111 and the first part 121 in the second direction Y when viewed from the first direction X, and a portion of the first connection portion 112a is located between the first side portion 122 and the second side portion 123 in the third direction Z. The bracket 12 covers a portion of the first connection portion 112a, thereby improving protection to the first seal portion 112. By positioning a portion of the first connection portion 112a between the main body portion 111 and the first part 121, and between the first side portion 122 and the second side portion 123, an expansion space can be provided for the first seal portion 112, which is advantageous for pressure relief, reduces the impact of the pressure inside the battery cell 11 on the first connection portion 112a, reduces the impact on the sealing performance of the first seal portion 112, and is advantageous for heat dissipation of the first seal portion 112.

[0123] In one embodiment, the battery cell 11 comprises an electrolyte solution provided within the battery cell case 11a. The electrode assembly 11b comprises a first electrode plate, a separator, and a second electrode plate, and the electrode assembly is formed by winding or stacking the first electrode plate, separator, and second electrode plate. A portion of the electrolyte solution permeates the first electrode plate, separator, and second electrode plate, conducting ions, while a portion remains in a free state, adhering to the surface of the battery cell case 11a and / or the surface of the electrode assembly 11b. The free electrolyte solution is referred to as the free electrolyte solution. During the process of multiple battery cells 11 circulating, the free electrolyte solution within the battery cells 11 is compressed.

[0124] In this invention, a portion of the first connecting portion 112a is positioned between the main body portion 111 and the first portion 121 in the second direction Y, and a portion of the first connecting portion 112a is positioned between the first side portion 122 and the second side portion 123 in the third direction Z, thereby providing an expansion space to the first sealing portion 112 and reducing the effect of the expansion of the battery cell 11 on the sealing performance of the first sealing portion 112.

[0125] In one embodiment, the bracket 12 includes a third connecting portion 128 that connects a second portion 127 and a first portion 121. The third connecting portion 128 is located between adjacent electrode terminals 11c along a first direction X, and the projection of the third connecting portion 128 coincides with the projection of the electrode terminals 11c. The third connecting portion 128 is connected to the portion of the electrode terminals 11c that extends from the battery cell case 11a. The third connecting portion 128 can support the electrode terminals 11c protruding from the first connecting portion 112a along the first direction X, which is advantageous for bending and connecting the electrode terminals 11c of two adjacent battery cells 11.

[0126] Referring to Figures 12 and 13, in one embodiment, the bracket 12 includes a first protrusion 110 extending from a second extension 126 along a first direction X, and a third recess 120 provided in the second extension 126. When the body portions 111 of adjacent battery cells 11 are in contact and connected, the first protrusion 110 is located within the third recess 120 of the adjacent bracket 12, and a gap exists between the first protrusion 110 and the third recess 120. The third recess 120 and the first protrusion 110 position the adjacent brackets 12, reduce displacement of adjacent body portions 111, and facilitate pressure between multiple body portions 111. The gap between the first protrusion 110 and the third recess 120 reduces the force acting on the bracket 12, improves protection to the first seal portion 112, and increases the connection strength between the bracket 12 and the battery cell 11.

[0127] In one embodiment, the bracket 12 includes a second protrusion 130 extending from a first extension 125 along a first direction X, and a fourth recess 140 provided in the first extension 125. When the bodies of adjacent battery cells 11 are in contact and connected, the second protrusion 130 is located within the fourth recess 140 of the adjacent bracket 12, and a gap exists between the second protrusion 130 and the fourth recess 140. The fourth recess 140 and the second protrusion 130 further position the adjacent bracket 12, further reducing the displacement of adjacent bodies 111 and further facilitating the pressure exerted by multiple bodies 111 on each other. The gap between the second protrusion 130 and the fourth recess 140 reduces the force acting on the bracket 12, further improving protection to the first seal 112 and further increasing the connection strength between the bracket 12 and the battery cell 11.

[0128] In one embodiment, the battery cell unit 10 comprises two brackets 12, one bracket 12 connected to a portion of a first seal portion 112, and the other bracket 12 connected to a portion of another first seal portion 112. One electrode terminal 11c protrudes from the first seal portion 112 and bracket 12 along a second direction Y, and the other electrode terminal 11c protrudes from the other first seal portion 112 and bracket 12 along a direction opposite to the second direction Y.

[0129] In one embodiment, the structures of the two brackets 12 included in the battery cell unit 10 are identical.

[0130] In one embodiment, the battery module comprises two collection modules 20, each collection module 20 comprising a conductor 22 and a sampler 21. The main body 111 comprises two first seal portions 112. The two first seal portions 112 are arranged along a second direction Y. The battery cell 11 comprises two electrode terminals 11c. One sampler 21 is connected to the mutually stacked electrode terminals 11c of two adjacent battery cells 11 of a first seal portion 112 protruding in the second direction Y, and the other sampler 21 is connected to the mutually stacked electrode terminals 11c of two adjacent battery cells 11 of another first seal portion 112 protruding in the direction opposite to the second direction Y.

[0131] Referring to Figures 2 to 5, in one embodiment, if the battery cell 11 has two electrode terminals 11c, with one electrode terminal 11c extending from a first seal portion 112 to the outside of the battery cell case 11a and the other electrode terminal 11c extending from another first seal portion 112 to the outside of the battery cell case 11a, then two samplers 21 are provided. One sampler 21 is connected to the mutually connected electrode terminals 11c of two adjacent battery cells 11 on one side, and the other sampler 21 is connected to the mutually connected electrode terminals 11c of two adjacent battery cells 11 on the other side.

[0132] Referring to Figure 2, in one embodiment, the battery module 100 includes a circuit board 30, and the battery cell unit 10 and the circuit board 30 are arranged along a first direction X. The circuit board 30 is connected to a conductor 22 and can receive data collected by a sampler 21. The circuit board 30 includes a BMS (Battery Management System) module containing multiple electronic components, which can realize functions such as control, protection, communication, energy calculation, signal transmission, and power transmission of the battery cell 11. Optionally, the circuit board 30 is a flexible printed circuit board (FPC). Optionally, the circuit board 30 is a printed circuit board (PCB), and multiple conductors (not shown) are provided on the circuit board 30.

[0133] Referring to Figures 1 and 2, in one embodiment, the battery module 100 further comprises a housing 40 including a wall 41, a front wall 42, a first side wall 43, a second side wall 44, a top wall 45, and a bottom wall 46. The front wall 42 and the rear wall 41 are arranged along a first direction X, the second side wall 44 and the first side wall 43 are arranged along a second direction Y, and the bottom wall 46 and the top wall 45 are arranged along a third direction Z. The rear wall 41 is connected to the first side wall 43, the second side wall 44, the top wall 45, and the bottom wall 46, forming a housing space. The battery cell unit 10 is provided within the housing space.

[0134] Referring to Figures 2 and 22, in one embodiment, the battery module 100 further includes an elastic member 50 provided between the battery cell unit 10 and the housing 40. The elastic member 50 is fixedly connected to the housing 40 and can apply pressure to the battery cell 11 and provide an expansion space. Optionally, the elastic member 50 is provided between the battery cell unit 10 and the rear wall 41. Optionally, the elastic member 50 is provided between the battery cell unit 10 and the front wall 42. Optionally, the battery module 100 comprises two elastic members 50, one of which is provided between the battery cell unit 10 and the rear wall 41, and the other elastic member 50 is provided between the battery cell unit 10 and the front wall 42.

[0135] In one embodiment, the elastic member 50 comprises a base portion 51 and a third bent portion 52 and a fourth bent portion 53 provided along a third direction Z. The third bent portion 52 is connected to the fourth bent portion 53 via the base portion 51. The base portion 51 is positioned to provide pressure to the battery cell unit 10, and the pressure from the third bent portion 52 and the fourth bent portion 53 acts on the multiple battery cell units 10 via the base portion 51. The third bent portion 52 and the fourth bent portion 53 are positioned to provide expansion space to the battery cell unit 10, and when the battery cell 11 expands, the third bent portion 52 and the fourth bent portion 53 contract.

[0136] In one embodiment, the third bent portion 52 is fixedly connected to the first side wall 43 and the second side wall 44, and the fourth bent portion 53 is fixedly connected to the bottom wall 46.

[0137] In one embodiment, the third bent portion 52 is fixedly connected to the top wall 45 and the bottom wall 46, and the fourth bent portion 53 is fixedly connected to the top wall 45 and the bottom wall 46.

[0138] In one embodiment, when the battery cell 11 is not expanded, the elastic member 50 does not apply pressure to the battery cell unit 10, and the elastic member 50 is connected to the battery cell 11. When the battery cell 11 expands, the battery cell 11 compresses the elastic member 50, and the elastic member 50 applies pressure to the battery cell 11.

[0139] In one embodiment, when the battery cell 11 is not expanded, the elastic member 50 provides pressure to the battery cell 11. When the battery cell 11 expands, the battery cell 11 compresses the elastic member 50, and the elastic member 50 provides more pressure to the battery cell 11.

[0140] In one embodiment, the base portion 51 is connected to the main body portion 111 of the outermost battery cell 11. The base portion 51 is provided with a plurality of protrusions 511 spaced apart in the first direction X, and the protrusions 511 are formed in a recessed direction away from the main body portion 111 from the side of the base portion 51 facing the main body portion 111. This increases the structural strength of the base portion 51 and reduces the risk of deformation of the base portion 51 due to uneven load distribution.

[0141] In one embodiment, the elastic member 50 includes a first connecting step 54 connected to the opposite side of the base 51 of the third bent portion 52. The first connecting step 54 is fixedly connected to the housing 40, and the third bent portion 52 is fixedly connected to the housing 40 via the first connecting step 54, thereby transmitting the force acting on the third bent portion 52 to the housing 40. Examples of fixing methods include welding, adhesive fixing, contact fixing, engagement fixing, and screw fixing.

[0142] In one embodiment, the first connecting stage 54 is parallel to the base 51, which is advantageous for the elastic member 50 to deform in the first direction X.

[0143] In one embodiment, the elastic member 50 includes a second connecting step 55 connected to the opposite side of the base 51 of the fourth bent portion 53. The second connecting step 55 is fixedly connected to the housing 40, and the fourth bent portion 53 is fixedly connected to the housing 40 via the second connecting step 55, thereby transmitting the force acting on the fourth bent portion 53 to the housing 40. Examples of fixing methods include welding, adhesive fixing, contact fixing, engagement fixing, and screw fixing.

[0144] In one embodiment, the second connecting stage 55 is parallel to the base 51, which is advantageous for the elastic member 50 to deform in the first direction X.

[0145] In one embodiment, a first fixing portion 431 is provided on the first side wall 43, and the projection of the first connecting stage 54 and the projection of the first fixing portion 431 overlap along the first direction X, and the first connecting stage 54 is fixed to the first fixing portion 431.

[0146] In one embodiment, a second fixing portion 441 is provided on the second side wall 44, and the projection of the first connecting stage 54 and the projection of the second fixing portion 441 overlap along the first direction X, and the first connecting stage 54 is fixed to the second fixing portion 441.

[0147] In one embodiment, the first fixing portion 431 is closer to the battery cell unit 10 than the first connection stage 54, thereby facilitating the fixing of the first fixing portion 431 to the first connection stage 54.

[0148] In one embodiment, the second fixing portion 441 is closer to the battery cell unit 10 than the first connection stage 54, thereby facilitating the fixing of the second fixing portion 441 to the first connection stage 54.

[0149] In one embodiment, the structural strength of the first side wall 43 is greater than that of the elastic member 50, thereby reducing the risk of deformation of the first side wall 43 due to the force acting on the third bent portion 52.

[0150] In one embodiment, the structural strength of the second side wall 44 is greater than that of the elastic member 50, thereby reducing the risk of deformation of the second side wall 44 due to the force acting on the third bent portion 52.

[0151] In one embodiment, the thickness of the first side wall 43 is greater than the thickest part of the base 51, the third bent portion 52, and the first connecting step 54, thereby increasing the structural strength of the first side wall 43 and reducing the risk of deformation of the first side wall 43 due to the force acting on the third bent portion 52.

[0152] In one embodiment, the thickness of the second side wall 44 is greater than the thickest part of the base 51, the third bent portion 52, and the first connecting step 54, thereby increasing the structural strength of the second side wall 44 and reducing the risk of deformation of the second side wall 44 due to the force acting on the third bent portion 52.

[0153] In one embodiment, a third fixing portion 46a is provided on the bottom wall 46, and the projection of the bottom wall 46 and the projection of the third fixing portion 46a overlap along the first direction X. The second connecting stage 55 is fixed to the third fixing portion 46a. Examples of fixing methods include welding, adhesive fixing, contact fixing, engagement fixing, and screw fixing.

[0154] In one embodiment, the third fixing portion 46a is closer to the battery cell unit 10 than the second connection stage 55, thereby facilitating the fixing of the third fixing portion 46a to the second connection stage 55.

[0155] In one embodiment, the structural strength of the bottom wall 46 is greater than that of the elastic member 50, thereby reducing the risk of deformation of the bottom wall 46 due to the force acting on the third bent portion 52.

[0156] In one embodiment, the thickness of the bottom wall 46 is greater than the thickest part of the base 51, the fourth bent portion 53, and the second connecting step 55, thereby increasing the structural strength of the bottom wall 46 and reducing the risk of deformation of the bottom wall 46 due to the force acting on the fourth bent portion 53.

[0157] In one embodiment, the third bent portion 52 comprises a first bent step 521 connecting to the base portion 51 and a second bent step 522 connecting the first bent step 521 and the first connecting step 54. The first bent step 521 and the base portion 51 form a first angle A1, the second bent step 522 and the first connecting step 54 form a second angle B1, and the first bent step 521 and the second bent step 522 form a third angle C1, and A1 ≥ B1. This is advantageous in increasing the deformation resistance of the first bent step 521 and reducing the risk of the elastic member 50 deforming in the first direction X.

[0158] In one embodiment, C1 > A1, which is advantageous in promoting uniform deformation of the third bent portion 52.

[0159] In one embodiment, C1=2B1=2A1, which is advantageous in further promoting uniform deformation of the third bent portion 52.

[0160] In one embodiment, the fourth bent portion 53 comprises a third bent step 531 connecting to the base portion 51 and a fourth bent step 532 connecting the third bent step 531 and the second connecting step 55. The third bent step 531 and the base portion 51 form a first angle A2, the fourth bent step 532 and the second connecting step 55 form a second angle B2, and the third bent step 531 and the fourth bent step 532 form a third angle C2, and A2 ≥ B2. This is advantageous in increasing the deformation resistance of the third bent step 531 and reducing the risk of the elastic member 50 deforming in the first direction X.

[0161] In one embodiment, C2 > A2, which is advantageous in promoting uniform deformation of the fourth bent portion 53.

[0162] In one embodiment, C2 = 2B2 = 2A2, which is advantageous in further promoting uniform deformation of the fourth bent portion 53.

[0163] Selectively, the fourth bent portion 53 is set to the same angle as the third bent portion 52. When the third bent portion 52 and the fourth bent portion 53 are subjected to force, they receive the force uniformly and deform uniformly, thereby reducing the risk of the elastic member 50 rotating due to uneven deformation. Selectively, A1=A2, B1=B2, and C1=C2.

[0164] Referring to Figures 2 and 23, in one embodiment, the bottom wall 46 is provided with a first limiting portion 461 extending along a first direction X and a second limiting portion 462 extending along the first direction X. The second limiting portion 462 and the first limiting portion 461 are provided along a second direction Y. The first limiting portion 461 and the second limiting portion 462 are convex to the surface of the bottom wall 46 relative to the top wall 45 along a direction opposite to the third direction Z. When the bracket 12 is provided inside the housing 40, the bracket 12 is located between the first limiting portion 461 and the second limiting portion 462. The first limiting portion 461 and the second limiting portion 462 guide the movement of the battery cell unit 10. The first limiting portion 461 and the second limiting portion 462 can restrict the movement of the bracket 12 along the second direction Y, which is advantageous for the bracket to move along the first direction X.

[0165] Referring to Figure 2, in one embodiment, the top wall 45 is provided with a third limiting portion 451 extending along a first direction X and a fourth limiting portion 452 extending along the first direction X. The fourth limiting portion 452 and the third limiting portion 451 are arranged along a second direction Y. The first limiting portion 461 and the third limiting portion 451 are arranged along a third direction Z, and the second limiting portion 462 and the fourth limiting portion 452 are arranged along the third direction Z. The third limiting portion 451 and the fourth limiting portion 452 are convex to the surface of the top wall 45 relative to the bottom wall 46 along the third direction Z. If a bracket 12 is provided in the housing 40, the bracket 12 is located between the third limiting portion 451 and the fourth limiting portion 452. The third limiting portion 451 and the fourth limiting portion 452 further guide the movement of the battery cell unit 10. If the battery cell 11 expands, the third limiting portion 451 and the fourth limiting portion 452 can restrict the movement of the bracket 12 along the second direction Y, which is advantageous for the bracket 12 to move along the first direction X.

[0166] Referring to Figure 24, 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, electronic equipment, drones, backup power supplies, electric vehicles, electric motorcycles, electric assist bicycles, power tools, large household battery storage modules, etc.

[0167] A person ordinary in the art should understand that the above embodiments are for illustrative purposes only and do not limit the present invention. Any appropriate modifications and variations to the above embodiments within the scope of the spirit of the present invention are included within the scope of the disclosure. [Explanation of Symbols]

[0168] 100 Battery Modules 10 Battery cell units 11 battery cells 11a Battery Cell Case 111 Main body 111a 1st wall 111b 2nd wall 111c 3rd wall 111d 4th wall 111e 5th wall 111f 6th wall 1111 Case 1 1111a First recess 1112 Case 2 1112a Second recess 1113 1st extension side 1114 2nd extension side 112 First seal section 112a First connection section 112b 1st bend 112c 2nd bend 113 Second seal section 11b Electrode assembly 1116 1st straight stage 1117 2nd straight stage 1118 First curved section 1119 Second Curved Section 11c electrode terminal 101 Lamination area 102 Segment 1 103 Segment 2 12 brackets 121 Part 1 122 First side 122a First gap 123 Second side 123a Second gap 124 Second connection section 125 1st extension part 126 Second extension part 128 Third Connection Section 110 First protrusion 120 Third recess 130 Second protrusion 140 Fourth recess 20 Collection Modules 21 Sampler 22 Conductor 30 Circuit boards 40 cabinets 41 Back wall 42 Front wall 43 First side wall 431 1st fixed part 44 Second side wall 441 Second fixed part 45 Top Wall 451 3rd limit part 452 4th limit part 46 Bottom wall 46a 3rd fixed part 461 1st limit part 462 2nd limit part 50 Elastic members 51 Base 52 3rd bend 521 1st folding stage 522 2nd folding stage 53 4th bend 531 3rd folding stage 532 4th folding stage 200 Electrical equipment X 1st direction Y Second direction Z 3rd direction

Claims

1. It comprises a plurality of battery cell units arranged along a first direction, and a collection module including a plurality of samplers, Each of the aforementioned battery cell units comprises a battery cell and a bracket, The battery cell comprises an electrode assembly, a battery cell case, and electrode terminals connected to the electrode assembly and extending from the battery cell case. The battery cell case comprises a main body on which the electrode assembly is provided, and a first sealing portion having a first connecting portion. The electrode terminals extend from the first connection portion to the outside of the battery cell case. The bracket includes a first portion that covers a part of the first connection portion, The electrode terminal protrudes from the first portion, A battery module characterized in that at least two of the electrode terminals and one of the samplers are connected in a stacked configuration.

2. The battery module according to claim 1, characterized in that the collection module includes a wire for connecting each of the samplers.

3. The battery module according to claim 2, characterized in that the sampler is welded or press-fitted to at least one of the electrode terminals that are connected to each other.

4. The portions of the electrode terminals of two adjacent battery cells that protrude from the first portion are stacked and connected to form a stacked region. The main body and the first portion are arranged side by side along the second direction, The projection of the sampler is located within the projection of the stacked region along the second direction, The battery module according to any one of claims 1 to 3, characterized in that the second direction is perpendicular to the first direction.

5. The battery module according to claim 4, characterized in that the sampler is closer to the battery cell case than the stacking region along the second direction.

6. The portion of the electrode terminal extending from the first portion comprises a first segment and a second segment. The first segments of the electrode terminals of adjacent battery cells are spaced apart along the first direction, and the second segments of the electrode terminals of adjacent battery cells are stacked along the second direction. The battery module according to any one of claims 1 to 5, characterized in that, in the second direction, the length H of the first segment extending from the first portion is 2 mm ≤ H ≤ 20 mm.

7. The first sealing portion comprises a first bent portion and a second bent portion, The first bent portion is connected to the second bent portion via the first connecting portion. The bracket comprises a first side portion that covers the first bent portion and a second side portion that covers the second bent portion. The first side and the second side are arranged along the third direction, The battery module according to claim 6, characterized in that the first direction, the second direction and the third direction are orthogonal to each other.

8. The battery module according to claim 7, characterized in that, when observed from the first direction, a part of the first connection portion is located between the main body portion and the first portion in the second direction, and between the first side portion and the second side portion in the third direction.

9. The battery module according to any one of claims 1 to 8, characterized in that there is pressure between adjacent battery cell cases.

10. The battery module according to any one of claims 1 to 9, characterized in that the main bodies of adjacent battery cells are connected in contact.

11. The aforementioned battery cell case has a winding structure and comprises a first wall, a second wall, a third wall and a fourth wall, The second wall is positioned opposite the first wall along the second direction, The third wall is positioned opposite the fourth wall along the first direction, The battery module according to any one of claims 1 to 10, characterized in that the first portion, when viewed from a direction opposite to the second direction, does not exceed the third wall and does not exceed the fourth wall in the first direction.

12. The electrode assembly has a winding structure and comprises a first straight stage, a second straight stage, a first curved stage, and a second curved stage. The first straight stage connects the first curved stage and the second curved stage, The second straight stage connects the first curved stage and the second curved stage, The battery module according to claim 11, characterized in that, in the first direction, the projection of the third wall covers the projection of the first linear step, and the projection of the fourth wall covers the projection of the second linear step.

13. The battery module according to any one of claims 1 to 12, characterized in that the bracket is integrally molded with the battery cell.

14. The battery module according to any one of claims 1 to 13, characterized in that the bracket is an insulating bracket.

15. The battery module according to any one of claims 1 to 14, characterized in that the first portion is provided surrounding at least a part of the electrode terminals.

16. The sampler is positioned to be displaced in accordance with the deformation of the electrode terminals. The battery module according to claim 2, characterized in that a portion of the conductor is arranged to move in conjunction with the movement of the sampler.

17. An electrical device characterized by including a battery module according to any one of claims 1 to 16.

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