Battery module and electric equipment

Abstract

The invention discloses a battery module and electric equipment. The battery module comprises a plurality of battery cell units arranged along a first direction and a shell, each battery cell unit comprises a battery cell and a bracket; the battery cell comprises an electrode assembly, a battery cell shell and an electrode terminal connected to the electrode assembly and led out of the battery cell shell. The battery cell shell comprises a main body part; the main body portion includes a first wall and a second wall aligned in a second direction. The electrode assembly is arranged on the main body part. The bracket includes a first portion. The first portion covers at least a portion of the first wall. The housing includes a bottom wall. The first part is connected with the bottom wall. The bottom wall, the first part and the battery cell unit are arranged along a second direction, and the first part is configured to move relative to the bottom wall along the first direction. When the battery cell expands, the main body part can move relative to the bottom wall through the first part, so that the main body part is convenient to move and protected, and the risk that the main body part is damaged to influence the use of the battery module is reduced.

Description

Battery modules and electrical equipment Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery module and electrical equipment. Background Art

[0002] Currently, batteries usually fix the cell in the battery casing. When the cell expands, the expanded cell casing may produce partial displacement. Since the cell casing is fixed in the battery casing, it is not conducive to the expansion of the cell and affects the safety of battery use.

[0003] Summary of the Invention

[0004] In view of this, it is necessary to provide a battery module and an electrical device, wherein the battery cells can move relative to the housing to protect the battery cells.

[0005] An embodiment of the present application provides a battery module comprising a plurality of battery cell units and a shell arranged along a first direction. Each battery cell unit comprises a battery cell and a bracket. The battery cell comprises an electrode assembly, a battery cell shell, and an electrode terminal connected to the electrode assembly and extending from the battery cell shell. The battery cell shell comprises a main body. The main body comprises a first wall and a second wall arranged along a second direction. The electrode assembly is provided in the main body. The bracket comprises a first part. The first part covers at least a portion of the first wall. The shell comprises a bottom wall. The first part is connected to the bottom wall. The bottom wall, the first part, and the battery cell units are arranged along the second direction, and the first part is configured to be movable relative to the bottom wall along the first direction. When the battery cell expands, the main body can move relative to the bottom wall through the first part, and the first part can reduce the friction between the main body and the bottom wall during movement, thereby facilitating movement and protecting the main body, thereby reducing the risk of damage to the main body affecting the use of the battery module.

[0006] Optionally, in some embodiments of the present application, the first portion is in contact with and connected to the bottom wall, and the battery cell moves relative to the bottom wall via the first portion.

[0007] Optionally, in some embodiments of the present application, the battery cell housing includes a first sealing portion. The first sealing portion extends from the main body. The first sealing portion includes a first connecting portion. The bracket includes a second portion that covers at least a portion of the first connecting portion. The electrode terminal extends from the first connecting portion and is protected by the second portion.

[0008] Optionally, in some embodiments of the present application, the first sealing portion includes a first bent portion and a second bent portion disposed opposite to each other along the second direction. The first bent portion is connected to the second bent portion via a first connecting portion, and the bracket includes a first side portion covering the first bent portion and a second side portion covering the second bent portion, thereby protecting the first bent portion and the second bent portion.

[0009] Optionally, in some embodiments of the present application, when observed in a direction opposite to the third direction, in the first direction, the first side portion does not extend beyond the first part, and a first gap is formed between adjacent first side portions, which can reduce the force acting on the first side portion, and further reduce the force acting on the first sealing portion, which is beneficial to protecting the first sealing portion. The first gap is also beneficial to heat dissipation of the battery cell.

[0010] Optionally, in some embodiments of the present application, when observed in a direction opposite to the third direction, in the first direction, the second side portion does not extend beyond the first portion, and a second gap is formed between adjacent second side portions, which can reduce the force acting on the second side portion, thereby further reducing the force acting on the first sealing portion, further benefiting in protecting the first sealing portion, and the second gap is also beneficial in dissipating heat from the battery cell.

[0011] Optionally, in some embodiments of the present application, when observed along the first direction, in the second direction, part of the first connection part is located between the main body and the second part, and in the third direction, part of the first connection part is located between the first side part and the second side part. The part of the first connection part is covered by the bracket to increase the protection of the first connection part. By arranging the part of the first connection part between the main body and the first part and between the first side part and the second side part, expansion space can be provided for the first sealing part, which is conducive to pressure relief, reduces the impact of the pressure in the battery cell on the first connection part, reduces the impact on the sealing of the first sealing part, and is conducive to heat dissipation of the first sealing part.

[0012] Optionally, in some embodiments of the present application, the first side portion is in contact with the bottom wall, so that the first sealing portion and the main body portion can move together, which is beneficial for protecting the first sealing portion.

[0013] Optionally, in some embodiments of the present application, the bottom wall is provided with a first limiting portion and a second limiting portion. The first limiting portion and the second limiting portion are spaced apart along the third direction. The first portion is located between the first limiting portion and the second limiting portion. The first limiting portion and the second limiting portion guide movement of the battery cell unit.

[0014] Optionally, in some embodiments of the present application, the housing includes a top wall. The bottom wall and the top wall are arranged relative to each other along the second direction. The bracket includes two first parts, and the two first parts are arranged relative to each other along the second direction. One of the first parts is connected to the bottom wall, and the first part is configured to be movable relative to the bottom wall. The other first part covers at least a portion of the second wall, and the first part is connected to the top wall, and the first part is configured to be movable relative to the top wall. By arranging the first part on both the first wall and the second wall, the first part can move relative to the bottom wall, and can also move relative to the top wall, thereby facilitating the movement of the battery cell unit relative to the bottom wall and the top wall.

[0015] Optionally, in some embodiments of the present application, the top wall is provided with a third limit portion and a fourth limit portion. The third limit portion and the fourth limit portion are spaced apart along the third direction. The first portion connected to the top wall is located between the third limit portion and the fourth limit portion. The third limit portion and the fourth limit portion guide the movement of the battery cell unit.

[0016] Optionally, some embodiments of the present application further include a first elastic member. Multiple battery cells and the first elastic member are arranged in a first direction. The first elastic member is configured to provide expansion space for the battery cells, thereby buffering the pressure applied to the battery cell assembly and reducing the impact on the battery module's service life.

[0017] Optionally, in some embodiments of the present application, the first elastic member is configured to apply pressure to the battery cell unit. Along the first direction, the plurality of battery cell units are in a pressurized state.

[0018] Optionally, in some embodiments of the present application, the first elastic member includes a base and a bent portion. The base is connected to the bent portion. The bent portion is fixed to the housing. The base is configured to apply pressure to the battery cell, and the bent portion is configured to provide expansion space for the battery cell.

[0019] Optionally, in some embodiments of the present application, the bend portion includes a first bend portion and a second bend portion. The first bend portion is disposed opposite the second bend portion along the second direction. The first bend portion and the second bend portion respectively connect opposite sides of the base portion. The first bend portion and the second bend portion can provide expansion space for the battery cell unit.

[0020] Optionally, in some embodiments of the present application, the first elastic member includes a first connecting section. The first connecting section connects a side of the first bent portion away from the base. The first connecting section is fixed to the housing and can transfer a force acting on the bent portion to the housing.

[0021] Optionally, in some embodiments of the present application, the first bending portion includes a first bending section and a second bending section, wherein the first bending section connects the base and the second bending section, and the second bending section connects the first connecting section.

[0022] Optionally, in some embodiments of the present application, the first connecting section is parallel to the base, which is conducive to the deformation of the elastic member in the first direction.

[0023] Optionally, in some embodiments of the present application, the first bending section forms a first angle A1 with the base, and the second bending section forms a second angle B1 with the first connecting section, and A1 ≥ B1, which is beneficial to increase the ability of the first bending section to resist deformation and to reduce the risk of deformation of the first elastic member in the first direction.

[0024] Optionally, in some embodiments of the present application, the first bending section and the second bending section form a third angle C1, C1>A1, which is conducive to improving the uniform deformation of the first bending portion.

[0025] Optionally, in some embodiments of the present application, C1=2A1=2B1, which is beneficial to further improve the uniform deformation of the first bending portion.

[0026] Optionally, in some embodiments of the present application, the housing includes a first sidewall. The first sidewall is provided with a first fixing portion. Along a first direction, a projection of the first connecting section overlaps with a projection of the first fixing portion. The first connecting section is fixed to the first fixing portion to transfer a force acting on the bent portion to the first sidewall.

[0027] Optionally, in some embodiments of the present application, the structural strength of the first side wall is greater than the structural strength of the first elastic member, thereby reducing the risk of deformation of the first side wall due to the force applied to the first bending portion.

[0028] Optionally, in some embodiments of the present application, the first elastic member includes a second connecting section. The second connecting section connects to a side of the second bent portion away from the base. The second connecting section is fixed to the housing and can transfer a force acting on the bent portion to the housing.

[0029] Optionally, in some embodiments of the present application, the second connecting section is parallel to the base, which is beneficial to the deformation of the first elastic member in the first direction.

[0030] Optionally, in some embodiments of the present application, a third fixing portion is provided on the bottom wall. Along the first direction, a projection of the second connecting segment overlaps with a projection of the third fixing portion. The second connecting segment is fixed to the third fixing portion to transfer a force acting on the bent portion to the bottom wall.

[0031] Optionally, in some embodiments of the present application, the first bending portion and the second bending portion have the same structure, which is conducive to uniform stress and uniform deformation.

[0032] Optionally, in some embodiments of the present application, a third gap exists between the first wall and the bottom wall along the second direction to facilitate movement of the first part relative to the bottom wall.

[0033] Optionally, in some embodiments of the present application, a filling piece is further included. The filling piece is arranged in the third gap, and the filling piece can protect the portion of the first wall where the first part is not arranged.

[0034] Optionally, in some embodiments of the present application, there is a fourth gap between the top wall and the second wall, and the filling piece is arranged in the fourth gap to protect the portion of the second wall where the first portion is not arranged.

[0035] Optionally, in some embodiments of the present application, the main bodies of adjacent battery cell casings are in contact and connected to facilitate mutual application of pressure.

[0036] Optionally, in some embodiments of the present application, the battery cell housing includes a third wall and a fourth wall. Along the first direction, the third wall and the fourth wall are arranged opposite to each other. When viewed from a direction opposite to the third direction, in the first direction, the first portion does not extend beyond the third wall, and the first portion does not extend beyond the fourth wall. When the main bodies of adjacent battery cells exert pressure on each other, the force on the bracket can be reduced, thereby improving the connection strength between the bracket and the battery cell.

[0037] Optionally, in some embodiments of the present application, the electrode assembly is a winding structure, including a first straight section, a second straight section, a first curved section and a second curved section, the first straight section connects the first curved section and the second curved section, the second straight section connects the first curved section and the second curved section, and along the first direction, the projection of the third wall covers the projection of the first straight section, and the projection of the fourth wall covers the projection of the second straight section, which is conducive to uniformly applying pressure between the battery cells and further improving the service life of the battery cells.

[0038] Optionally, in some embodiments of the present application, along the first direction, the projection of the first part and the projection of the first curved segment overlap, the projection of the first part and the projection of the first straight segment are separated, and the projection of the first part and the projection of the second straight segment are separated, which is conducive to uniformly applying pressure between the battery cells and further improving the service life of the battery cells.

[0039] Optionally, in some embodiments of the present application, the bracket is integrally formed with the battery cell, which can improve the connection strength between the bracket and the battery cell.

[0040] Optionally, in some embodiments of the present application, the bracket is an insulating bracket, which can reduce the risk of short circuit between the bracket and the battery cell.

[0041] Optionally, in some embodiments of the present application, the battery cell includes a square shell battery cell.

[0042] Optionally, in some embodiments of the present application, when viewed in a direction opposite to the third direction, in the first direction, the second portion is located between the third wall and the fourth wall. When the main bodies of adjacent battery cells exert pressure on each other, the force on the first sealing portion can be reduced, thereby improving the protection of the first sealing portion.

[0043] Optionally, in some embodiments of the present application, when viewed in a direction opposite to the third direction, in the first direction, the first side portion is located between the third wall and the fourth wall. When the main bodies of adjacent battery cells apply pressure to each other, the force on the first sealing portion can be reduced, thereby improving the protection of the first sealing portion.

[0044] Optionally, in some embodiments of the present application, when viewed in a direction opposite to the third direction, in the first direction, the second side portion is located between the third wall and the fourth wall. When the main bodies of adjacent battery cells apply pressure to each other, the force on the first sealing portion can be reduced, thereby improving the protection of the first sealing portion.

[0045] Optionally, in some embodiments of the present application, a sliding member is provided on the side of the first part that contacts the bottom wall, and the sliding member can reduce the contact area between the first part and the bottom wall, thereby facilitating the movement of the first part relative to the bottom wall.

[0046] Optionally, in some embodiments of the present application, the first portion connects two ends of the first wall along the third direction to facilitate movement of the battery cell unit relative to the bottom wall.

[0047] Optionally, in some embodiments of the present application, along the third direction, the first part covers the entire first wall, which can enhance the protection of the first wall by the first part.

[0048] Optionally, in some embodiments of the present application, the first portion covers a portion of the first wall and a portion of the second sealing portion, thereby protecting the first wall and the second sealing portion.

[0049] Optionally, in some embodiments of the present application, the first portion covers a portion of the second wall and a portion of the second sealing portion, thereby protecting the second wall and the second sealing portion.

[0050] Optionally, in some embodiments of the present application, a second elastic member is provided between the first elastic member and the battery cell. When the battery cell expands, the second elastic member may be compressed to further provide expansion space for the battery cell and further apply pressure to the battery cell.

[0051] Optionally, in some embodiments of the present application, a third elastic member is provided between the rear wall and the battery cell. When the battery cell expands, the third elastic member may be compressed to further provide expansion space for the battery cell and further apply pressure to the battery cell.

[0052] An embodiment of the present application further provides an electrical device, comprising the battery module of any of the above embodiments.

[0053] The main body of the above-mentioned battery module and electrical equipment can move relative to the bottom wall through the first part, and the first part can reduce the friction between the main body and the bottom wall during movement, thereby facilitating movement and protecting the main body, and reducing the risk of damage to the main body affecting the use of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] FIG1 shows a schematic structural diagram of a battery module in some embodiments.

[0055] FIG. 2 shows an exploded schematic diagram of a battery module in some embodiments.

[0056] FIG3 is a schematic structural diagram of a battery cell and a bracket in some embodiments.

[0057] FIG4 is a schematic diagram showing a partial structure of a battery module in some embodiments.

[0058] FIG5 is a schematic structural diagram of a battery cell unit in some embodiments.

[0059] FIG6 shows a partially enlarged schematic diagram of a battery cell unit in some embodiments.

[0060] FIG7 shows a schematic cross-sectional view of the battery module along line II-II in FIG1 .

[0061] FIG8 is a schematic diagram showing the structure of a battery cell in some embodiments.

[0062] FIG9 is a schematic structural diagram of a battery cell viewed along a direction Z′ opposite to a third direction Z in some embodiments.

[0063] FIG10 shows an exploded schematic diagram of a battery cell in some embodiments.

[0064] FIG11 shows a schematic structural diagram of battery cells in other embodiments.

[0065] FIG12 shows schematic structural diagrams of battery cells observed along a direction Z′ opposite to the third direction Z in some other embodiments.

[0066] FIG13 shows a schematic structural diagram of a square shell battery cell in some embodiments.

[0067] FIG14 is a schematic structural diagram of an electrode assembly in some embodiments.

[0068] FIG15 is a schematic diagram showing the structure of a battery cell and a bracket in some embodiments.

[0069] FIG16 shows a schematic structural diagram of a battery cell and a bracket from another perspective in some embodiments.

[0070] FIG17 is a schematic structural diagram of a battery cell unit viewed along a direction Z′ opposite to a third direction Z in some embodiments.

[0071] FIG18 shows a schematic cross-sectional view of the battery cell unit along line IV-IV in FIG15 .

[0072] FIG19 shows a partially enlarged schematic diagram of a battery cell and a bracket in some embodiments.

[0073] FIG20 is an enlarged schematic diagram of another portion of the battery cell and the bracket in some embodiments.

[0074] FIG. 21 is a schematic structural diagram of the top wall in some embodiments.

[0075] FIG. 22 is a schematic diagram showing a partial structure of a housing in some embodiments.

[0076] FIG. 23 shows a schematic structural diagram of the first elastic member in some embodiments.

[0077] FIG24 shows a schematic cross-sectional view of the battery module along line III-III in FIG1 .

[0078] FIG25 shows a schematic cross-sectional view of the battery module along line III-III in some other embodiments.

[0079] FIG26 shows a schematic diagram of an electric device in some embodiments.

[0080] Description of the main component symbols: Battery module 100 Battery cell unit 10 Battery cell 11 Battery cell housing 11a Main body 111 First wall 111a Second wall 111b Third wall 111c Fourth wall 111d Fifth wall 111e Sixth wall 111f First housing 1111 First recess 1111a Second housing 1112 Second recess 1112a First extending edge 1113 Second extending edge 1114 First sealing portion 112 First connecting portion 112a Second connecting portion 112b Third connecting portion 112c Second sealing portion 113 Electrode assembly 11b Electrode terminal 11c Bracket 12 First portion 121 First protrusion 1211 Third recess 1212 Second portion 122 First side portion 123 First gap123a Second side portion 124 Second gap 124a Fourth connecting portion 125 Third portion 126 Housing 20 First space 20a Bottom wall 21 First limiting portion 211 Second limiting portion 212 Third fixing portion 213 Third gap 21a Fourth gap 21b Top wall 22 Third limiting portion 221 Fourth limiting portion 222 Rear wall 23 Front wall 24 First side wall 25 First fixing portion 251 Second side wall 26 Second fixing portion 261 Filling member 30 First elastic member 40 Base 41 Bend portion 42 First bent portion 421 First bent section 421a Second bent section 421b Second bent portion 422 Third bent section 422aFourth bending section 422b First connecting section 43 Second connecting section 44 Second elastic member 45 Third elastic member 46 Electric device 200 First direction X Second direction Y Third direction Z

[0081] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0082] The following detailed description is illustrative and non-limiting. It is intended to provide a basic understanding of the present application and is not intended to identify the key or decisive elements of the present application or to limit the scope of protection. As long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any manner.

[0083] When a component is referred to as being “disposed on” another component, it can be directly disposed on the other component or there may be a component intervening therebetween. When a component is referred to as being “connected to” another component, it can be directly connected to the other component or there may be a component intervening therebetween.

[0084] It can be understood that the terms "perpendicular, equal" are used to describe the ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular or equal between the two components. For example, combined with numerical descriptions, perpendicular can refer to the angle between two straight lines being in the range of 90°±10°, perpendicular can also refer to the dihedral angle between two planes being in the range of 90°±10°, and perpendicular can also refer to the angle between a straight line and a plane being in the range of 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0085] The term "parallel" is used to describe the ideal state between two components. In actual production or use, there may be a state of approximate parallelism between the two components. For example, combined with numerical descriptions, parallel can refer to the angle between two straight lines being in the range of 180°±10°, parallel can also refer to the dihedral angle between two planes being in the range of 180°±10°, and parallel can also refer to the angle between a straight line and a plane being in the range of 180°±10°. The two components described as "parallel" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if its overall extension direction is a straight line or a plane.

[0086] Unless otherwise defined, the term "plurality" herein, when used to describe the number of components, specifically means that the components are two or more.

[0087] In the first direction X, it includes the first direction X and a direction opposite to the first direction X; in the second direction Y, it includes the second direction Y and a direction opposite to the second direction Y; in the third direction Z, it includes the third direction Z and a direction opposite to the third direction Z.

[0088] For the convenience of description, part of the electrode terminal 11c is not bent.

[0089] Referring to Figures 1 to 8, one embodiment of the present application provides a battery module 100 comprising a plurality of battery cell units 10 and a housing 20. The plurality of battery cell units 10 are arranged along a first direction X. Each battery cell unit 10 includes a battery cell 11 and a bracket 12, which connects the battery cell 11. The battery cell 11 includes a battery cell housing 11a, an electrode assembly 11b, and an electrode terminal 11c connected to the electrode assembly 11b and extending from the battery cell housing 11a. The battery cell housing 11a includes a main body 111, with the electrode assembly 11b disposed within the main body 111. The main body 111 includes a first wall 111a and a second wall 111b arranged along a second direction Y. The bracket 12 includes a first portion 121, which covers at least a portion of the first wall 111a. The housing 20 includes a bottom wall 21. The bottom wall 21, the first portion 121, and the battery cell units 10 are arranged along the second direction Y. The first portion 121 connects to the bottom wall 21. The first portion 121 is configured to be movable relative to the bottom wall 21 along the first direction X. When the battery cell 11 expands, the main body 111 can move relative to the bottom wall 21 via the first portion 121. The first portion 121 reduces friction between the main body 111 and the bottom wall 21 during movement, facilitating movement and protecting the main body 111. This reduces the risk of damage to the main body 111 that could affect the use of the battery module 100.

[0090] In one embodiment, the bracket 12 is integrally formed with the battery cell 11, which can improve the connection strength between the bracket 12 and the battery cell 11. Optionally, the bracket 12 is integrally formed with the battery cell 11 by low-pressure injection molding.

[0091] In one embodiment, the bracket 12 is an insulating bracket, which can reduce the risk of short circuit between the bracket 12 and the battery cell 11 .

[0092] Referring to Figures 8 to 11 , in one embodiment, the battery cell 11 comprises a pouch cell. The main body 111 is provided with a storage space and includes a first shell 1111 and a second shell 1112. The first shell 1111 is provided with a first recess 1111a, and the second shell 1112 is provided with a second recess 1112a. The first shell 1111 is connected to the second shell 1112, forming a storage space. The electrode assembly 11b is partially located in the first recess 1111a and partially located in the second recess 1112a. The periphery of the first shell 1111 extends outward to form a first extended edge 1113, and the periphery of the second shell 1112 extends outward to form a second extended edge 1114. When the first shell 1111 is connected to the second shell 1112, the first extended edge 1113 and the second extended edge 1114 overlap and are sealed together, forming two first sealed portions 112 and two second sealed portions 113. The two first sealing portions 112 are arranged along the third direction Z, and the two second sealing portions 113 are arranged along the second direction Y. One first sealing portion 112 connects the two second sealing portions 113 , and the other first sealing portion 112 connects the two second sealing portions 113 .

[0093] In one embodiment, the first extension edge 1113 and the second extension edge 1114 overlap and are sealed to form a first sealing portion 112 and two second sealing portions 113. The two second sealing portions 113 are arranged along the second direction Y, and the first sealing portion 112 connects the two second sealing portions 113.

[0094] Referring to Figures 8 and 9 , in one embodiment, the main body 111 further includes a third wall 111c and a fourth wall 111d. The third wall 111c and the fourth wall 111d are disposed opposite each other along the first direction X. A second sealing portion 113 is connected to the first wall 111a, and another second sealing portion 113 is connected to the second wall 111b.

[0095] Referring to Figures 8 and 9 , in one embodiment, the main body 111 further includes a fifth wall 111e and a sixth wall 111f. The sixth wall 111f and the fifth wall 111e are arranged along a third direction Z. The first sealing portion 112 is connected to the fifth wall 111e, and another first sealing portion 112 is connected to the sixth wall 111f. The third direction Z is perpendicular to both the first direction X and the second direction Y. The fifth wall 111e connects the third wall 111c and one of the first sealing portions 112, and the sixth wall 111f connects the third wall 111c and the other first sealing portion 112.

[0096] Referring to FIG. 8 , in one embodiment, the battery cell 11 includes two electrode terminals 11 c , one of which extends from the first sealing portion 112 out of the battery cell housing 11 a , and the other extends from the other first sealing portion 112 out of the battery cell housing 11 a .

[0097] Referring to FIG. 11 and FIG. 12 , in one embodiment, the battery cell 11 includes two electrode terminals 11 c . The two electrode terminals 11 c extend from the same first sealing portion 112 out of the battery cell housing 11 a .

[0098] Referring to Figure 12 , in one embodiment, the main body 111 is provided with a storage space. The main body 111 comprises a first housing 1111 and a second housing 1112. The first housing 1111 has a first recess 1111a, while the second housing 1112 is flat. The first housing 1111 is connected to the second housing 1112, forming the storage space. The electrode assembly 11b is located in the first recess 1111a.

[0099] In one embodiment, the main body 111 includes two fifth walls 111e, a sixth wall 111f, and a first sealing portion 112. The main body 111 defines a storage space and includes a first shell 1111 and a second shell 1112. The first shell 1111 is connected to the second shell 1112. The first shell 1111 defines a first recess 1111a, and the second shell 1112 defines a second recess 1112a. This creates a storage space. The electrode assembly 11b is located in the first recess 1111a and the second recess 1112a. Two electrode terminals 11c extend from the same first sealing portion 112 and out of the cell shell 11a.

[0100] Optionally, there is one sixth wall 111f and one first sealing portion 112, one fifth wall 111e connects the third wall 111c and the first sealing portion 112, and another fifth wall 111e connects the fourth wall 111d and the first sealing portion 112. When viewed along a direction Z' opposite to the third direction Z, in the first direction X, the two fifth walls 111e are located on opposite sides of the first sealing portion 112. The first direction X includes the first direction X and the direction opposite to the first direction X.

[0101] Optionally, there are two sixth walls 111f and two first sealing portions 112, one of the fifth walls 111e connecting the third wall 111c and the first sealing portion 112, and the other fifth wall 111e connecting the fourth wall 111d and the first sealing portion 112. When viewed along the direction Z' opposite to the third direction Z, the two fifth walls 111e are connected and located on opposite sides of the first sealing portion 112 in the first direction X. One of the sixth walls 111f connects the third wall 111c and the other first sealing portion 112, and the other sixth wall 111f connects the fourth wall 111d and the other first sealing portion 112. When viewed along the third direction Z, the two sixth walls 111f are located on opposite sides of the first sealing portion 112 in the first direction X.

[0102] Referring to Figures 8 and 9, in one embodiment, the main body 111 includes two fifth walls 111e, two sixth walls 111f, and two first sealing portions 112. One of the fifth walls 111e connects the third wall 111c and one of the first sealing portions 112, while the other fifth wall 111e connects the fourth wall 111d and one of the first sealing portions 112. One of the sixth walls 111f connects the third wall 111c and the other of the first sealing portions 112, while the other sixth wall 111f connects the fourth wall 111d and the first sealing portion 112. One of the electrode terminals 11c extends from one of the first sealing portions 112 out of the cell casing 11a, while the other electrode terminal 11c extends from the other of the first sealing portions 112 out of the cell casing 11a.

[0103] The two fifth walls 111e are located on opposite sides of the first sealing portion 112 in the first direction X as viewed along the direction Z′ opposite to the third direction Z. The two sixth walls 111f are located on opposite sides of the second sealing portion 113 in the first direction X as viewed along the third direction Z.

[0104] In one embodiment, the main body 111 includes a fifth wall 111e, a sixth wall 111f, and two first sealing portions 112. The fifth wall 111e connects the third wall 111c and the first sealing portion 112, and the sixth wall 111f connects the third wall 111c and the first sealing portion 112. The main body 111 defines a storage space and includes a first shell 1111 and a second shell 1112. The first shell 1111 defines a first recess 1111a, and the second shell 1112 is flat. The first shell 1111 connects to the second shell 1112, forming a storage space. The electrode assembly 11b is located in the first recess 1111a. One electrode terminal 11c extends from one of the first sealing portions 112 out of the cell housing 11a, and the other electrode terminal 11c extends from the other first sealing portion 112 out of the cell housing 11a.

[0105] Please refer to Figure 12. In one embodiment, the main body 111 includes a fifth wall 111e, a sixth wall 111f and a first sealing portion 112. The main body 111 is provided with a storage space. The main body 111 includes a first shell 1111 and a second shell 1112. The first shell 1111 is provided with a first recess 1111a, and the second shell 1112 is flat. The first shell 1111 is connected to the second shell 1112 to form a storage space. The electrode assembly 11b is provided in the first recess 1111a. Two electrode terminals 11c extend from the same first sealing portion 112 out of the battery cell shell 11a. Optionally, there is one first sealing portion 112, the fifth wall 111e connects the third wall 111c and the first sealing portion 112, and the sixth wall 111f connects the third wall 111c. When there are two first sealing portions 112 , the fifth wall 111 e connects the third wall 111 c and the first sealing portion 112 , and the sixth wall 111 f connects the third wall 111 c and the other first sealing portion 112 .

[0106] Referring to Figures 10 and 14-18, in one embodiment, the electrode assembly 11b has a wound structure and includes a first straight section 1116, a second straight section 1117, a first curved section 1118, and a second curved section 1119. The first straight section 1116 connects the first curved section 1118 and the second curved section 1119, while the second straight section 1117 connects the first curved section 1118 and the second curved section 1119. Along the first direction X, the projection of the third wall 111c overlaps the projection of the first straight section 1116, the projection of the fourth wall 111d overlaps the projection of the first straight section 1116, the projection of the third wall 111c overlaps the projection of the second straight section 1117, and the projection of the fourth wall 111d overlaps the projection of the second straight section 1117. This facilitates uniform pressure application between the battery cells 11, further improving the service life of the battery cells 11.

[0107] In one embodiment, along the first direction X, the projection of the first portion 121 overlaps with the projection of the first curved section 1118, the projection of the first portion 121 is separated from the projection of the first straight section 1116, and the projection of the first portion 121 is separated from the projection of the second straight section 1117. The first portion 121 can protect the first curved section 1118, which is beneficial to uniformly apply pressure between the battery cells 11, thereby further improving the service life of the battery cells 11.

[0108] In one embodiment, the bracket includes two first parts, the projection of the other first part 121 overlaps with the projection of the second curved section 1119, the projection of the first part 121 is separated from the projection of the first straight section 1116, and the projection of the first part 121 is separated from the projection of the second straight section 1117. The first part 121 can protect the second curved section 1119, which is beneficial to uniformly apply pressure between the battery cells 11, thereby further improving the service life of the battery cells 11.

[0109] In one embodiment, when viewed from a direction Z' opposite to the third direction Z, the first portion 121 does not extend beyond the third wall 111c, and the first portion 121 does not extend beyond the fourth wall 111d in the first direction X. When the main bodies 111 of adjacent battery cells 11 exert pressure on each other, the force applied to the bracket 12 is reduced, thereby improving the connection strength between the bracket 12 and the battery cells 11.

[0110] Referring to Figures 8, 15, and 20, in one embodiment, a first sealing portion 112 extends from the main body 111. The first sealing portion 112 includes a first connecting portion 112a, from which the electrode terminal 11c extends out of the cell housing 11a. The bracket 12 covers at least a portion of the first connecting portion 112a to protect it.

[0111] In one embodiment, the bracket 12 includes a second portion 122 , the second portion 122 covers a portion of the first connection portion 112 a , and the electrode terminal 11 c extends from the second portion 122 to protect a portion of the first connection portion 112 a .

[0112] In one embodiment, when observed along the direction Z' opposite to the third direction Z, in the first direction X, the second portion 122 is located between the third wall 111c and the fourth wall 111d. When the main bodies 111 of adjacent battery cells 11 apply pressure to each other, the force on the first sealing portion 112 can be reduced, thereby improving the protection of the first sealing portion 112.

[0113] In one embodiment, the first sealing portion 112 includes a second connecting portion 112b and a third connecting portion 112c, which are disposed opposite to each other along the second direction Y. The second connecting portion 112b is connected to the third connecting portion 112c through the first connecting portion 112a.

[0114] In one embodiment, the bracket 12 includes a first side portion 123 and a second side portion 124. One end of the second portion 122 is connected to the first side portion 123, and the other end is connected to the second side portion 124, thereby increasing the structural strength of the bracket 12. The first side portion 123 covers the second connecting portion 112b, and the second side portion 124 covers the third connecting portion 112c, thereby protecting the first sealing portion 112.

[0115] In one embodiment, the first side portion 123 covers the connection portion between the first connecting portion 112 a and the second connecting portion 112 b , thereby enhancing protection for the first sealing portion 112 .

[0116] In one embodiment, the second side portion 124 covers the connection portion between the first connection portion 112 a and the third connection portion 112 c , which helps to enhance the protection of the first sealing portion 112 .

[0117] In one embodiment, the first side portion 123 is in contact with the bottom wall 21 , so that the first sealing portion 112 and the main body portion 111 can move together, thereby facilitating protection of the first sealing portion 112 .

[0118] In one embodiment, when observed along the direction Z' opposite to the third direction Z, in the first direction X, the first side portion 123 is located between the third wall 111c and the fourth wall 111d. When the main bodies 111 of adjacent battery cells 11 apply pressure to each other, the force on the first sealing portion 112 can be reduced, thereby improving the protection of the first sealing portion 112.

[0119] In one embodiment, when observed along the direction Z' opposite to the third direction Z, in the first direction X, the second side portion 124 is located between the third wall 111c and the fourth wall 111d. When the main bodies 111 of adjacent battery cells 11 apply pressure to each other, the force on the first sealing portion 112 can be reduced, thereby improving the protection of the first sealing portion 112.

[0120] In one embodiment, along the third direction Z, the projection of the first side portion 123 and the projection of the first curved section 1118 overlap, the projection of the first side portion 123 and the projection of the first straight section 1116 are separated, and the projection of the first side portion 123 and the projection of the second straight section 1117 are separated, which is beneficial to the pressure relief of the battery cell 11.

[0121] In one embodiment, along the third direction Z, the projection of the second side portion 124 overlaps with the projection of the second curved section 1119 , the projection of the second side portion 124 is separated from the projection of the first straight section 1116 , and the projection of the second side portion 124 is separated from the projection of the second straight section 1117 , which is beneficial to the pressure relief of the battery cell 11 .

[0122] Referring to Figures 3 to 6 and 18 , in one embodiment, when viewed in a direction Z' opposite to the third direction Z, in the first direction X, the first side portions 123 do not extend beyond the first portion 121, and a first gap 123a is formed between adjacent first side portions 123. When adjacent battery cell casings 11a are in contact and apply pressure to each other, the force acting on the first side portions 123 is reduced, thereby reducing the force acting on the first sealing portion 112, thereby facilitating protection of the first sealing portion 112. The first gap 123a also facilitates heat dissipation from the battery cell 11.

[0123] Referring to Figures 3 to 6 and 18 , in one embodiment, as viewed along a direction Z' opposite to the third direction Z, in the first direction X, the second side portions 124 do not extend beyond the first portion 121, and a second gap 124a is formed between adjacent second side portions 124. When adjacent battery cell casings 11a are in contact and apply pressure to each other, the force acting on the second side portions 124 is reduced, further reducing the force acting on the first sealing portion 112, further facilitating protection of the first sealing portion 112. The second gap 124a also facilitates heat dissipation from the battery cells 11.

[0124] Referring to Figure 16 , in one embodiment, as viewed along the first direction X, a portion of the first connection portion 112a is located between the main body 111 and the second portion 122 in the third direction Z, and a portion of the first connection portion 112a is located between the first side portion 123 and the second side portion 124 in the second direction Y. The bracket 12 covers the portion of the first connection portion 112a, providing increased protection for the first connection portion 112a. Positioning the portion of the first connection portion 112a between the main body 111 and the first portion 121 and between the first side portion 123 and the second side portion 124 provides expansion space for the first sealing portion 112, facilitating pressure relief, reducing the impact of pressure within the battery cell 11 on the first connection portion 112a, minimizing the impact on the sealing performance of the first sealing portion 112, and facilitating heat dissipation from the first sealing portion 112.

[0125] Referring to Figures 8 and 15 to 18 , in one embodiment, the bracket 12 includes a fourth connecting portion 125 that covers a portion of the fifth wall 111e. One end of the fourth connecting portion 125 is connected to the first side portion 123, and the other end is connected to the second side portion 124, further increasing the structural strength of the bracket 12. When viewed in a direction Z' opposite to the third direction Z, in the first direction X, the fourth connecting portion 125 does not extend beyond the third wall 111c, and the fourth connecting portion 125 does not extend beyond the fourth wall 111d. The main bodies 111 of adjacent battery cells 11 can be in contact and connected. When adjacent battery cells 11 apply pressure to each other through the main bodies 111, the force applied to the first sealing portion 112 can be reduced, thereby improving protection for the first sealing portion 112.

[0126] In some embodiments, the main body 111 includes a plurality of fifth walls 111e, and the bracket 12 correspondingly includes a plurality of fourth connecting portions 125. Optionally, some of the fifth walls 111e are provided with fourth connecting portions 125. Optionally, each fifth wall 111e is provided with a fourth connecting portion 125.

[0127] In one embodiment, the bracket 12 includes a third portion 126, which is connected to the side of the fourth connecting portion 125 facing the second portion 122. The third portion 126 extends from the fourth connecting portion 125 along the third direction Z and covers a portion of the first sealing portion 112. The third portion 126 supports and protects the connection between the first sealing portion 112 and the fourth connecting portion 125, thereby reducing the risk of damage to the first sealing portion 112 and affecting the sealing of the battery cell 11.

[0128] In some embodiments, the main body 111 includes a plurality of fifth walls 111e, and the bracket 12 includes a plurality of third portions 126 and a plurality of fourth connecting portions 125. Optionally, some of the third portions 126 are connected to the fourth connecting portions 125. Optionally, each third portion 126 is connected to one fourth connecting portion 125.

[0129] In one embodiment, along the first direction X, the bracket 12 includes a first protrusion 1211 and a third recess 1212. The third recess 1212 is provided on the first portion 121 and extends from the first portion 121. When the main bodies 111 of adjacent battery cells 11 are in contact and connected, the first protrusion 1211 is located within the third recess 1212 of the adjacent bracket 12, and a gap exists between the first protrusion 1211 and the third recess 1212. The third recess 1212 and the first protrusion 1211 position adjacent brackets 12, reducing the offset of adjacent main bodies 111 and facilitating mutual pressure between the multiple main bodies 111. The gap between the first protrusion 1211 and the third recess 1212 reduces the force applied to the bracket 12, improves the protection of the first sealing portion 112, and increases the connection strength between the bracket 12 and the battery cell 11. Referring to Figures 8 and 15 to 20 , in one embodiment, the battery cell unit 10 includes two brackets 12, one of which is connected to a portion of one first sealing portion 112, and the other is connected to a portion of the other first sealing portion 112. One electrode terminal 11c extends from the first sealing portion 112 and the bracket 12 along a third direction Z, while the other electrode terminal 11c extends from the second sealing portion 113 and the bracket 12 along a direction Z′ opposite to the third direction Z.

[0130] Referring to FIG. 13 , in one embodiment, the battery cell 11 comprises a prismatic battery cell. The prismatic battery cell comprises a rigid shell, and the bracket 12 is connected to the rigid shell. The prismatic battery cell can be moved relative to the bottom wall 21 via the first portion 121 .

[0131] 2 , 7 , 15 , and 19 to 22 , in one embodiment, the first portion 121 is connected to the bottom wall 21 via a small amount of adhesive (not shown) to facilitate preliminary positioning of the battery cell 10 when the battery cell 10 is placed within the housing 20. Optionally, the adhesive includes glue.

[0132] In one embodiment, the first portion 121 is in contact with the bottom wall 21 , and the first portion 121 can move directly relative to the bottom wall 21 .

[0133] In one embodiment, a sliding member (not shown) is provided on the side where the first portion 121 contacts the bottom wall 21. The sliding member can reduce the contact area between the first portion 121 and the bottom wall 21, thereby reducing the friction between the first portion 121 and the bottom wall 21, thereby facilitating the movement of the first portion 121 relative to the bottom wall 21.

[0134] In one embodiment, the first portion 121 is extended from the first side portion 123 to increase the structural strength of the bracket 12 .

[0135] In one embodiment, the first portion 121 and the first side portion 123 are separately provided, so as to facilitate adjustment of the position of the first portion 121 covering the first wall 111 a .

[0136] In one embodiment, the first portion 121 covers a portion of the first wall 111a, and the first portion 121 protrudes from the first wall 111a. Along the second direction Y, a third gap 21a exists between the bottom wall 21 and the first wall 111a. Optionally, the first portion 121 covers either end of the first wall 111a. Optionally, the first portion 121 covers the middle section of the first wall 111a. Optionally, the first portion 121 includes a multi-section split structure. Optionally, the first portion 121 connects the two ends of the first wall 111a along the third direction Z to facilitate the movement of the battery cell unit 10 relative to the bottom wall 21. Optionally, part of the first portion 121 connects the two ends of the first wall 111a along the third direction Z, and part of the first portion 121 connects the middle section of the first wall 111a, which can further facilitate the movement of the battery cell unit 10 relative to the bottom wall 21.

[0137] Referring to Figure 23 , in one embodiment, the battery module 100 further includes a filler 30 disposed in the third gap 21a. The filler 30 protects the portion of the first wall 111a where the first portion 121 is not provided. Optionally, the filler 30 is elastic. Optionally, the filler 30 comprises foam. Optionally, the filler 30 is non-elastic.

[0138] In one embodiment, the first portion 121 covers a portion of the first wall 111 a and a portion of the second sealing portion 113 , thereby protecting the first wall 111 a and the second sealing portion 113 .

[0139] In one embodiment, the first wall 111 a and the second sealing portion 113 are both covered with the first portion 121 , which can enhance the protection of the first wall 111 a and the second sealing portion 113 by the first portion 121 and better increase the connection strength between the bracket 12 and the battery cell 11 .

[0140] Referring to Figures 7 and 22 , in one embodiment, the bottom wall 21 is provided with a first stopper 211 extending along the first direction X. The first portion 121 can contact the first stopper 211, guiding the movement of the battery cell 10 via the first stopper 211. Optionally, the first stopper 211 is formed by a protrusion from the bottom wall 21 along the second direction Y.

[0141] In one embodiment, the bottom wall 21 is provided with a second limiting portion 212, which extends along the first direction X. The first limiting portion 211 and the second limiting portion 212 are spaced apart along the third direction Z. The main body 111 is located between the first limiting portion 211 and the second limiting portion 212, and the first portion 121 connecting the first wall 111a is located between the first limiting portion 211 and the second limiting portion 212. The first limiting portion 211 and the second limiting portion 212 further guide the movement of the battery cell 10. Optionally, the second limiting portion 212 is formed by the bottom wall 21 protruding along the second direction Y.

[0142] Please refer to Figures 2, 7, 15, and 19 to 23. In one embodiment, the housing 20 includes a top wall 22. The bottom wall 21 and the top wall 22 are arranged opposite to each other along the second direction Y, and the battery cell unit 10 is located between the bottom wall 21 and the top wall 22.

[0143] In one embodiment, the bracket 12 includes two first portions 121, which are arranged relative to each other along the second direction Y. One of the first portions 121 covers at least a portion of the first wall 111a and is connected to the bottom wall 21, while the other first portion 121 covers at least a portion of the second wall 111b and is connected to the top wall 22. The first portions 121 are configured to be movable relative to the bottom wall 21 and the top wall 22. By providing the first portions 121 on both the first wall 111a and the second wall 111b, one first portion 121 can move relative to the bottom wall 21, while the other first portion 121 can move relative to the top wall 22, thereby enabling the battery cell 10 to move relative to the top wall 22.

[0144] In one embodiment, the second side portion 124 is in contact with the top wall 22 , which further facilitates the first sealing portion 112 and the main body portion 111 to move together, and is further beneficial for protecting the first sealing portion 112 .

[0145] In one embodiment, the first portion 121 is connected to the top wall 22 via a small amount of adhesive (not shown) to facilitate preliminary positioning of the battery cell 10 when the battery cell 10 is placed in the housing 20. Optionally, the adhesive includes glue.

[0146] In one embodiment, the first portion 121 contacts and is connected to the top wall 22 , and the first portion 121 can move directly relative to the top wall 22 .

[0147] In one embodiment, a sliding member (not shown) is provided on the side where the first portion 121 contacts the top wall 22. The sliding member can reduce the contact area between the first portion 121 and the top wall 22, thereby reducing the friction between the first portion 121 and the top wall 22, thereby facilitating the movement of the first portion 121 relative to the top wall 22.

[0148] In one embodiment, the first portion 121 is extended from the second side portion 124 to increase the structural strength of the bracket 12 .

[0149] In one embodiment, the first portion 121 and the second side portion 124 are separately provided, so as to facilitate adjustment of the position of the first portion 121 covering the second wall 111 b .

[0150] In one embodiment, the first portion 121 covers a portion of the second wall 111b, and the first portion 121 protrudes from the second wall 111b, so that a fourth gap 21b exists between the top wall 22 and the second wall 111b along the second direction Y. Optionally, the first portion 121 covers either end of the second wall 111b. Optionally, the first portion 121 covers the middle section of the second wall 111b. Optionally, the first portion 121 covering the second wall 111b includes a multi-section split structure. Optionally, the first portion 121 connects the two ends of the second wall 111b along the third direction Z to facilitate movement of the battery cell unit 10 relative to the top wall 22. Optionally, part of the first portion 121 connects the two ends of the second wall 111b along the third direction Z, and part of the first portion 121 connects the middle section of the second wall 111b, which can further facilitate movement of the battery cell unit 10 relative to the top wall 22.

[0151] In one embodiment, a filler 30 is disposed in the fourth gap 21b to protect the portion of the second wall 111b where the first portion 121 is not disposed. Optionally, the filler 30 is elastic. Optionally, the filler 30 comprises foam. Optionally, the filler 30 is non-elastic.

[0152] In one embodiment, the first portion 121 covers the entire second wall 111 b , thereby enhancing the protection of the first portion 121 on the second wall 111 b .

[0153] In one embodiment, the first portion 121 covers a portion of the second wall 111 b and another portion of the second sealing portion 113 , thereby protecting the second wall 111 b and the second sealing portion 113 .

[0154] In one embodiment, the second wall 111b and the second sealing portion 113 are both covered with the first portion 121 , which can enhance the protection of the second wall 111b and the second sealing portion 113 by the first portion 121 and better increase the connection strength between the bracket 12 and the battery cell 11 .

[0155] Referring to Figures 7 and 21 , in one embodiment, the top wall 22 is provided with a third stopper 221. The third stopper 221 extends along the first direction X, and the first portion 121 can contact the third stopper 221. The third stopper 221 guides the movement of the battery cell 10. Optionally, the third stopper 221 is formed by the top wall 22 protruding in a direction Y' opposite to the second direction Y.

[0156] In one embodiment, the top wall 22 is provided with a fourth limiting portion 222, which extends along the first direction X. The third limiting portion 221 and the fourth limiting portion 222 are spaced apart along the third direction Z. The main body 111 is located between the third limiting portion 221 and the fourth limiting portion 222, and the first portion 121 connected to the second wall 111b is located between the third limiting portion 221 and the fourth limiting portion 222. The movement of the battery cell 10 is further guided by the third limiting portion 221 and the fourth limiting portion 222. Optionally, the fourth limiting portion 222 is formed by the top wall 22 protruding in a direction Y' opposite to the second direction Y.

[0157] In one embodiment, when the battery module 100 includes two brackets 12, each bracket 12 includes four first portions 121, two of which are disposed on either side of the main body 111 along the second direction Y, and two of which are disposed on either side of the main body 111 along the third direction Z. The first wall 111a connects the two first portions 121, and the second wall 111b connects the two first portions 121. By providing two first portions 121 on both the first wall 111a and the second wall 111b, the two first portions 121 can move relative to the bottom wall 21 and the top wall 22, further facilitating movement of the battery cell 10 relative to the bottom wall 21 and the top wall 22.

[0158] Referring to Figures 2 and 7 , in one embodiment, the housing 20 includes a rear wall 23, a front wall 24, a first side wall 25, and a second side wall 26. The rear wall 23 and the front wall 24 are arranged along a first direction X, and the first side wall 25 and the second side wall 26 are arranged along a third direction Z. The rear wall 23 connects the first side wall 25 and the second side wall 26, and the front wall 24 connects the first side wall 25 and the second side wall 26. The bottom wall 21 connects the rear wall 23, the front wall 24, the first side wall 25, and the second side wall 26. The top wall 22 connects the rear wall 23, the front wall 24, the first side wall 25, and the second side wall 26, forming a first space 20a. The plurality of battery cells 10 are disposed in the first space 20a.

[0159] Referring to Figures 2 and 23 to 25, in one embodiment, the battery module 100 further includes a first elastic member 40. In a first direction X, a plurality of battery cells 10 and the first elastic member 40 are arranged along the first direction X. Optionally, the plurality of battery cells 10 and the first elastic member 40 are arranged along the first direction X. Optionally, the first elastic member 40 and the plurality of battery cells 10 are arranged along the first direction X. In the present application, the first elastic member 40 is located between the plurality of battery cells 10 and the front wall 24 along the first direction X. In other embodiments, the first elastic member 40 is located between the front wall 24 and the plurality of battery cells 10 along the first direction X.

[0160] The first elastic member 40 is disposed between the battery cell unit 10 and the housing 20. When the battery cell 11 expands, the first elastic member 40 can be compressed by the battery cell 11, thereby providing expansion space for the battery cell 11, buffering the pressure applied to the battery cell unit 10, and reducing the impact on the service life of the battery module 100.

[0161] In one embodiment, the first elastic member 40 is configured to apply pressure to the battery cell unit 10 , and the plurality of battery cell units 10 arranged along the first direction X are in a pressurized state.

[0162] In one embodiment, when the battery cell 11 is not expanded, the first elastic member 40 provides pressure to the battery cell 11. When the battery cell 11 expands, the battery cell 11 moves between the bottom wall 21 and the top wall 22. The first elastic member 40 provides expansion space for the battery cell 11 and continuously applies more pressure to the multiple battery cell units 10, thereby achieving dynamic balance of the multiple battery cell units 10.

[0163] In one embodiment, when the battery cell 11 is not expanded, the first elastic member 40 does not apply pressure to the battery cell unit 10. When the battery cell 11 expands, the battery cell 11 compresses the first elastic member 40. The first elastic member 40 provides expansion space for the battery cell 11 and continuously applies more pressure to the multiple battery cell units 10, thereby achieving dynamic balance of the multiple battery cell units 10.

[0164] In one embodiment, the first elastic member 40 includes a base 41 and a bent portion 42. The base 41 is connected to the bent portion 42, and the bent portion 42 is fixedly connected to the housing 20. The base 41 is configured to apply pressure to the battery cell 10, and the bent portion 42 is configured to provide expansion space for the battery cell 10.

[0165] In some embodiments, the base 41 is connected to the main body 111 of the outermost battery cell 11. The base 41 is provided with a plurality of protrusions 411 spaced apart along the third direction Z. The protrusions 411 are formed by recessing away from the main body 111 on the side of the base 41 facing the main body 111. This increases the structural strength of the base 41 and reduces the risk of deformation of the base 41 due to uneven force on the base 41.

[0166] In some embodiments, the bend portion 42 includes a first bend portion 421 and a second bend portion 422. Along the second direction Y, the first bend portion 421 connects one side of the base 41, and the second bend portion 422 connects the other two sides of the base 41. In another embodiment, along the third direction Z, the first bend portion 421 connects one side of the base 41, and the second bend portion 422 connects the other side of the one side of the base 41. The first bend portion 421 and the second bend portion 422 can act on the battery cell unit 10 through the base 41, providing space for the battery cell unit 10 to expand.

[0167] In some embodiments, the first elastic member 40 includes a first connecting section 43, which connects the side of the first bent portion 421 away from the base 41. The first connecting section 43 is fixed to the shell 20. The first bent portion 421 is fixed to the shell 20 through the first connecting section 43, and the force acting on the first bent portion 421 can be transferred to the shell 20.

[0168] In some embodiments, the first connecting section 43 is parallel to the base 41 , which facilitates deformation of the first elastic member 40 in the first direction X.

[0169] In some embodiments, the first elastic member 40 includes a second connecting section 44, which connects the side of the second bending portion 422 away from the base 41. The second connecting section 44 is fixed to the shell 20, and the second bending portion 422 is fixed to the shell 20 through the second connecting section 44, so that the force acting on the bending portion 42 can be transferred to the shell 20.

[0170] In some embodiments, the second connecting section 44 is parallel to the base 41 , which facilitates deformation of the first elastic member 40 in the first direction X.

[0171] In some embodiments, the first sidewall 25 is provided with a first fixing portion 251. Along the first direction X, the projection of the first connecting segment 43 overlaps with the projection of the first fixing segment 251, and the first connecting segment 43 is fixed to the first fixing segment 251. For example, the fixing methods include welding, bonding, abutting, clamping, or screwing. In some embodiments, the second sidewall 26 is provided with a second fixing portion 261. Along the first direction X, the projection of the first connecting segment 43 overlaps with the projection of the second fixing segment 261, and the first connecting segment 43 is fixed to the second fixing segment 261. For example, the fixing methods include welding, bonding, abutting, clamping, or screwing.

[0172] In some embodiments, the first fixing portion 251 is closer to the battery cell unit 10 than the first connecting segment 43 , which facilitates fixing the first fixing portion 251 and the first connecting segment 43 .

[0173] In some embodiments, the second fixing portion 261 is closer to the battery cell unit 10 than the first connecting segment 43 , which facilitates fixing the second fixing portion 261 and the first connecting segment 43 .

[0174] In some embodiments, the structural strength of the first sidewall 25 is greater than the structural strength of the first elastic member 40 , thereby reducing the risk of deformation of the first sidewall 25 due to the force acting on the first bent portion 421 .

[0175] In some embodiments, the structural strength of the second sidewall 26 is greater than the structural strength of the first elastic member 40 , thereby reducing the risk of deformation of the second sidewall 26 due to the force acting on the first bent portion 421 .

[0176] In some embodiments, the thickness of the first side wall 25 is greater than the maximum thickness of the base 41, the first bend portion 421 and the first connecting section 43, thereby improving the structural strength of the first side wall 25 and reducing the risk of deformation of the first side wall 25 due to the force acting on the first bend portion 421.

[0177] In some embodiments, the thickness of the second side wall 26 is greater than the maximum thickness of the base 41, the first bend portion 421 and the first connecting section 43, thereby improving the structural strength of the second side wall 26 and reducing the risk of deformation of the second side wall 26 due to the force exerted on the first bend portion 421.

[0178] In some embodiments, the bottom wall 21 is provided with a third fixing portion 213. Along the first direction X, the projection of the second connecting segment 44 overlaps with the projection of the third fixing portion 213, and the second connecting segment 44 is fixed to the third fixing portion 213. Optionally, the bottom wall 21 is provided with multiple third fixing portions 213, which are spaced apart along the third direction Z. The second connecting segment 44 is fixed to the multiple third fixing portions 213, which can enhance the connection strength between the second connecting segment 44 and the bottom wall 21. For example, welding, adhesive bonding, abutment bonding, clamping, screwing, etc. can be used.

[0179] In some embodiments, the third fixing portion 213 is closer to the battery cell unit 10 than the second connecting segment 44 , which facilitates fixing the third fixing portion 213 and the second connecting segment 44 .

[0180] In some embodiments, the structural strength of the bottom wall 21 is greater than the structural strength of the first elastic member 40 , thereby reducing the risk of deformation of the bottom wall 21 due to the force acting on the first bent portion 421 .

[0181] In some embodiments, the thickness of the bottom wall 21 is greater than the maximum thickness of the base 41, the second bend portion 422 and the second connecting section 44, thereby improving the structural strength of the bottom wall 21 and reducing the risk of deformation of the bottom wall 21 due to the force exerted on the second bend portion 422.

[0182] In some embodiments, the first bent portion 421 includes a first bent section 421a and a second bent section 421b. The first bent section 421a is connected to the base 41, and the second bent section 421b is connected to the first bent section 421a and the first connecting section 43. The first bent section 421a and the base 41 form a first angle A1, the second bent section 421b and the first connecting section 43 form a second angle B1, and the first bent section 421a and the second bent section 421b form a third angle C1. A1 ≥ B1, which helps to increase the ability of the first bent section 421a to resist deformation and helps reduce the risk of deformation of the first elastic member 40 in the first direction X.

[0183] In some embodiments, C1>A1, which is beneficial to improving the uniform deformation of the first bending portion 421.

[0184] In some embodiments, C1 = 2B1 = 2A1, which is beneficial for further improving the uniform deformation of the first bending portion 421 .

[0185] In some embodiments, the second bent portion 422 includes a third bent segment 422a and a fourth bent segment 422b. The third bent segment 422a connects to the base portion 41, and the fourth bent segment 422b connects to the third bent segment 422a and the second connecting segment 44. The third bent segment 422a and the base portion 41 form a first angle A2, the fourth bent segment 422b and the second connecting segment 44 form a second angle B2, and the third bent segment 422a and the fourth bent segment 422b form a third angle C2. A2 ≥ B2 helps increase the deformation resistance of the third bent segment 422a and reduces the risk of deformation of the first elastic member 40 in the first direction X.

[0186] In some embodiments, C2>A2, which is beneficial to improving the uniform deformation of the second bending portion 422.

[0187] In some embodiments, C2 = B2 = 2A2, which is beneficial for further improving the uniform deformation of the second bending portion 422 .

[0188] In some embodiments, the first and second bends 421 and 422 have identical structures, facilitating uniform stress and deformation. Optionally, the second bend 422 is configured at the same angle as the first bend 421. When stress is applied to the first and second bends 421 and 422, the stress and deformation are uniform, reducing the risk of uneven deformation causing the first elastic member 40 to rotate. Optionally, A1 = A2, B1 = B2, and C1 = C2.

[0189] In one embodiment, a second elastic member 45 is provided between the first elastic member 40 and the battery cell 11. The second elastic member 45 is compressible to further provide expansion space for the battery cell 11 and further apply pressure to the battery cell 11. Optionally, the second elastic member 45 includes foam.

[0190] In one embodiment, a third elastic member 46 is provided between the rear wall 23 and the battery cell 11. The third elastic member 46 can be compressed to further provide expansion space for the battery cell 11 and further apply pressure to the battery cell 11. Optionally, the third elastic member 46 includes foam.

[0191] 26 , the present application also provides an electrical device 200 using the battery module 100. 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 power-assisted bicycles, power tools, large household battery modules, and the like.

[0192] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments fall within the scope disclosed in the present application.

Claims

1. A battery module, characterized in that: include: A plurality of battery cell units arranged along a first direction, each of the battery cell units comprising a battery cell and a bracket, the battery cell comprising an electrode assembly, a battery cell shell, and an electrode terminal connected to the electrode assembly and led out from the battery cell shell; The battery cell housing includes a main body, the electrode assembly is disposed on the main body, and the main body includes a first wall and a second wall arranged along a second direction; The bracket includes a first portion, the first portion covering at least a portion of the first wall; The battery module further includes a shell, the shell includes a bottom wall, the first part is connected to the bottom wall, and the bottom wall, the first part and the battery cell units are arranged along the second direction; The first portion is configured to be movable relative to the bottom wall along the first direction, and the second direction is perpendicular to the first direction.

2. The battery module according to claim 1, characterized in that: The first portion is in contact with the bottom wall.

3. The battery module according to claim 1 or 2, characterized in that: The cell housing includes a first sealing portion extending from the main body, the first sealing portion includes a first connecting portion, the bracket includes a second portion covering at least a portion of the first connecting portion, and the electrode terminal extends from the first connecting portion.

4. The battery module according to claim 3, characterized in that: The first sealing portion includes a first bending portion and a second bending portion which are arranged opposite to each other along the second direction, and the first bending portion is connected to the second bending portion through the first connecting portion; The bracket includes a first side portion covering the first bending portion and a second side portion covering the second bending portion.

5. The battery module according to claim 4, characterized in that: Observed along the first direction, in the second direction, part of the first connecting portion is located between the main body and the second portion, and in the third direction, part of the first connecting portion is located between the first side portion and the second side portion. The first direction, the second direction and the third direction are perpendicular to each other.

6. The battery module according to claim 4 or 5, characterized in that: The first side portion is in contact with the bottom wall.

7. The battery module according to any one of claims 1 to 6, characterized in that: The bottom wall is provided with a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are spaced apart along the third direction, and the first portion is located between the first limiting portion and the second limiting portion.

8. The battery module according to any one of claims 1 to 7, characterized in that: The housing comprises a top wall, and the bottom wall and the top wall are arranged opposite to each other along the second direction; The bracket comprises two first parts, and the two first parts are arranged opposite to each other along the second direction; One of the first parts is connected to the bottom wall, and the first part is configured to be movable relative to the bottom wall; Another first portion covers at least a portion of the second wall, the first portion is connected to the top wall, and the first portion is configured to be movable relative to the top wall.

9. The battery module according to claim 8, characterized in that: The top wall is provided with a third limiting portion and a fourth limiting portion, the third limiting portion and the fourth limiting portion are arranged at intervals along the third direction, and the first portion connected to the top wall is located between the third limiting portion and the fourth limiting portion.

10. The battery module according to any one of claims 1 to 9, characterized in that: It also includes a first elastic member. In the first direction, the plurality of battery cell units and the first elastic member are arranged in an array, and the first elastic member is configured to provide expansion space for the battery cell.

11. The battery module according to claim 10, characterized in that: The first elastic member is configured to apply pressure to the battery cell unit.

12. The battery module according to claim 11, characterized in that: The first elastic member includes a base and a bending portion, the base is connected to the bending portion, the bending portion is fixed to the shell, the base is configured to apply pressure to the battery cell unit, and the bending portion is configured to provide expansion space for the battery cell unit.

13. The battery module according to claim 12, characterized in that: The bending portion includes a first bending portion and a second bending portion, the first bending portion is arranged opposite to the second bending portion along a second direction, the first bending portion is connected to one side of the base, and the second bending portion is connected to the other side of the base.

14. The battery module according to claim 13, characterized in that: The first elastic member includes a first connecting section, the first connecting section is connected to a side of the first bending portion away from the base, and the first connecting section is fixed to the shell.

15. The battery module according to claim 13, characterized in that: The first bending portion includes a first bending section and a second bending section, the first bending section connects the base and the second bending section, and the second bending section connects the first connecting section.

16. The battery module according to claim 15, characterized in that: The first bending section and the base form a first angle A1, and the second bending section and the first connecting section form a second angle B1, and A1≥B1.

17. The battery module according to claim 16, characterized in that: The first bending section and the second bending section form a third angle C1, where C1>A1.

18. The battery module according to claim 17, characterized in that: C1=2A1=2B1.

19. The battery module according to any one of claims 14 to 17, characterized in that: The shell includes a first side wall, the first side wall is provided with a first fixing portion, along the first direction, the projection of the first connecting section overlaps with the projection of the first fixing portion, and the first connecting section is fixed to the first fixing portion.

20. The battery module according to claim 19, characterized in that: The structural strength of the first side wall is greater than the structural strength of the first elastic member.

21. The battery module according to any one of claims 14 to 20, characterized in that: The first elastic member includes a second connecting section, the second connecting section is connected to a side of the second bent portion away from the base, and the second connecting section is fixed to the shell.

22. The battery module according to claim 21, characterized in that: The bottom wall is provided with a third fixing portion. Along the first direction, the projection of the second connecting section overlaps with the projection of the third fixing portion, and the second connecting section is fixed to the third fixing portion.

23. The battery module according to any one of claims 13 to 22, characterized in that: The first bending portion and the second bending portion have the same structure.

24. The battery module according to any one of claims 1 to 23, characterized in that: Along the second direction, a third gap exists between the first wall and the bottom wall.

25. The battery module according to claim 24, characterized in that: A filling piece is also included, and the filling piece is arranged in the third gap.

26. The battery module according to any one of claims 1 to 25, characterized in that: The main bodies of adjacent battery cell casings are in contact and connected.

27. The battery module according to any one of claims 1 to 26, characterized in that: The battery cell housing comprises a third wall and a fourth wall, and along the first direction, the third wall is arranged opposite to the fourth wall; Viewed along a direction opposite to the third direction, in the first direction, the first portion does not extend beyond the third wall, and the first portion does not extend beyond the fourth wall.

28. The battery module according to claim 27, characterized in that: The electrode assembly is a winding structure, including a first straight section, a second straight section, a first curved section and a second curved section, the first straight section connects the first curved section and the second curved section, the second straight section connects the first curved section and the second curved section, and along the first direction, the projection of the third wall covers the projection of the first straight section, and the projection of the fourth wall covers the projection of the second straight section.

29. The battery module according to claim 28, characterized in that: Along the first direction, the first partial projection overlaps with the projection of the first curved segment, the first partial projection is separated from the projection of the first straight segment, and the first partial projection is separated from the projection of the second straight segment.

30. The battery module according to any one of claims 1 to 29, characterized in that: The bracket is integrally formed on the battery core.

31. The battery module according to any one of claims 1 to 30, characterized in that: The bracket is an insulating bracket.

32. An electrical equipment, characterized in that: Comprising a battery module as described in any one of claims 1-31.

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