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 which are arranged along a first direction, each battery cell unit comprises a battery cell and a bracket; the battery cell comprises a battery cell shell and an electrode terminal. The battery cell shell comprises a main body part and a first sealing part; the first sealing part comprises a first connecting part, a first bent part and a second bent part. And the first bending part and the second bending part are oppositely arranged along the third direction. And the electrode terminal extends out of the battery cell shell from the first connecting part. The bracket includes a first portion, a first side portion, and a second side portion. The first part covers part of the first connecting part. The first side portion wraps the first bending portion. The second side portion wraps the second bending portion. A part of the first connecting part is located between the main body part and the first part, and a part of the first connecting part is located between the first side part and the second side part. According to the battery module, protection on the first sealing part is increased, an expansion space is provided for the first sealing part, and the influence on the sealing performance of the first sealing part 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] The battery cells in the battery module are sealed with the cell shell by the sealing part. The sealing part is weak and easily damaged, causing leakage of the battery cells and affecting the normal use of the battery cells. In order to strengthen the protection of the sealing part, the bracket is usually covered with the entire sealing part, or the sealing part is protected by glue. However, this not only affects the heat dissipation of the battery cell, but also is not conducive to the internal pressure relief of the battery cell, affecting the sealing of the battery cell.

[0003] Summary of the Invention

[0004] In view of this, it is necessary to provide a battery module and electrical equipment that can protect the sealing part, facilitate pressure release, and reduce the impact on the sealing of the battery cell.

[0005] An embodiment of the present application provides a battery module comprising a plurality of battery cell units 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 housing, and an electrode terminal. The electrode terminal connects the electrode assembly and extends from the battery cell housing. The battery cell housing comprises a main body and a first sealing portion. The first sealing portion comprises a first connecting portion, a first bend portion, and a second bend portion. The first connecting portion connects the first bend portion and the second bend portion. The first bend portion and the second bend portion are arranged opposite each other along a third direction. The electrode terminal extends from the first connecting portion out of the battery cell housing. The bracket comprises a first portion, a first side portion, and a second side portion. The first portion covers a portion of the first connecting portion. The first side portion covers the first bend portion. The second side portion covers the second bend portion. When viewed along the first direction, in the second direction, a portion of the first connecting portion is located between the main body and the first portion. In the third direction, a portion of the first connecting portion is located between the first side portion and the second side portion. The first, second, and third directions are perpendicular to each other. By covering part of the first sealing part with the bracket, the protection of the first sealing part is increased. By arranging part of the first connecting 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 beneficial to pressure relief, reduces the impact of the pressure in the battery cell on the first connecting part, reduces the impact on the sealing of the first sealing part, and is beneficial to the heat dissipation of the first sealing part.

[0006] Optionally, in some embodiments of the present application, the bracket includes a first extension portion extending from the first side portion. The main body portion includes a first side edge, and the first extension portion covers at least a portion of the first side edge to protect the main body portion and increase the connection strength between the bracket and the battery cell.

[0007] Optionally, in some embodiments of the present application, in the second direction, part of the first side and part of the second sealing part are provided with a first extension part, which can protect part of the main body, increase the connection strength between the bracket and the battery cell, and facilitate injection molding of the first extension part.

[0008] Optionally, in some embodiments of the present application, in the second direction, the first side and the second sealing portion are both provided with a first extension portion, which can better protect the main body and better increase the connection strength between the bracket and the battery cell.

[0009] Optionally, in some embodiments of the present application, the bracket includes a second extension. The second extension extends from the second side portion. The main body includes a second side edge. The first side edge and the second side edge are opposite to each other along a third direction. The second extension portion covers at least a portion of the second side edge, thereby protecting the main body and further strengthening the connection between the bracket and the battery cell.

[0010] Optionally, in some embodiments of the present application, in the second direction, part of the second side and part of the second sealing part are provided with a second extension part, which can protect part of the main body, increase the connection strength between the bracket and the battery cell, and facilitate injection molding of the second extension part.

[0011] Optionally, in some embodiments of the present application, in the second direction, the second side and the second sealing portion are provided with a second extension portion, which can better protect the main body and better increase the connection strength between the bracket and the battery cell.

[0012] Optionally, in some embodiments of the present application, the battery cell housing includes two second sealing portions arranged along the third direction. One second sealing portion is provided on the first side, and the other second sealing portion is provided on the second side. The first extension portion covers at least a portion of the second sealing portion. The second extension portion covers at least a portion of the other second sealing portion, thereby protecting the second sealing portion.

[0013] Optionally, in some embodiments of the present application, the main body includes a first wall, the first connecting portion is connected to the first wall, and the bracket includes a second connecting portion. The second connecting portion covers a portion of the first wall to protect the main body.

[0014] Optionally, in some embodiments of the present application, the bracket includes a second portion extending from the second connecting portion along the second direction, the second portion being disposed opposite to the first portion along the second direction, and the second portion covering a portion of the first connecting portion to protect the first connecting portion.

[0015] Optionally, in some embodiments of the present application, when observed along the first direction, part of the first connecting part is located in a first space formed by the second connecting part, the first part, the first side part and the second side part. The surrounding sides of the first connecting part are protected by the first part, the first side part, the second side part and the second connecting part to reduce the influence of the expansion of the battery cell on the sealing of the first sealing part, and the first space can also dissipate heat from the battery cell.

[0016] Optionally, in some embodiments of the present application, along the second direction, the projection of the electrode assembly is between the first side portion and the second side portion. When the pressure in the battery cell needs to be released in time, the battery cell can break through the first connecting portion and part of the bracket to release the pressure by limiting the position of the first side portion and the second side portion.

[0017] Optionally, in some embodiments of the present application, the bracket is integrally formed with the battery cell, which is beneficial to improving the connection strength between the bracket and the battery cell.

[0018] Optionally, in some embodiments of the present application, the battery cell contains an electrolyte, and part of the electrolyte is attached to the inner wall of the battery cell shell and / or the electrode assembly in a free state.

[0019] Optionally, in some embodiments of the present application, the main body includes a first housing and a second housing. The first housing has a first recess, and the second housing has a second recess. The first housing connects to the second housing to form a storage space. The electrode assembly is partially located in the first recess, and partially located in the second recess.

[0020] Optionally, in some embodiments of the present application, the main body includes a first shell and a second shell. The first shell has a first recess, and the second shell is flat. The first shell is connected to the second shell to form a storage space, and the electrode assembly is disposed in the first recess.

[0021] Optionally, in some embodiments of the present application, the battery cell housing includes two first sealing portions. The two first sealing portions are arranged along the second direction. The battery cell includes two electrode terminals, one of which extends out of the battery cell housing from the first sealing portion, and the other extends out of the battery cell housing from the other first sealing portion.

[0022] Optionally, in some embodiments of the present application, the battery cell includes two electrode terminals, which extend from the first sealing portion out of the battery cell housing.

[0023] Optionally, in some embodiments of the present application, the main body includes a second wall, a third wall, and a fourth wall. The second wall and the first wall are arranged along the second direction. The third wall and the fourth wall are arranged along the first direction. When viewed in a direction opposite to the second direction, in the first direction, the second connecting portion is located between the third wall and the fourth wall. When adjacent battery cell shells are in contact and connected, a gap exists between adjacent second connecting portions, thereby reducing the impact of the pressure exerted by the adjacent battery cell shells on the second connecting portion, reducing the force on the first sealing portion, and facilitating the protection of the first sealing portion and the stability of the bracket connecting the battery cell.

[0024] Optionally, in some embodiments of the present application, the main bodies of adjacent battery cell casings are in contact and connected, which is conducive to pressurizing the main bodies.

[0025] Optionally, in some embodiments of the present application, there is pressure between the main bodies of adjacent battery cell shells, and multiple battery cell units are in a pressurized state, which is beneficial to improving the service life of the battery cell units.

[0026] Optionally, in some embodiments of the present application, a first gap is formed between adjacent first side portions. When adjacent battery cell shells are in contact and connected and apply pressure to each other, the first gap between the two adjacent first side portions can reduce the force acting on the first side portions, thereby reducing 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.

[0027] Optionally, in some embodiments of the present application, a second gap is formed between adjacent second side portions. When adjacent battery cell shells are in contact and connected and apply pressure to each other, the second gap between the two adjacent second side portions can reduce the force acting on the second side portions, thereby further reducing the force acting on the first sealing portion, which is further beneficial to protecting the first sealing portion. The second gap is also beneficial to heat dissipation of the battery cell.

[0028] Optionally, in some embodiments of the present application, when viewed in a direction opposite to the second direction, in the first direction, the first side portion does not extend beyond the first extension portion, and the second side portion does not extend beyond the second extension portion, thereby reducing the force acting on the first side portion and the second side portion, and further reducing the force acting on the first sealing portion, which is beneficial to protecting the first sealing portion.

[0029] Optionally, in some embodiments of the present application, the bracket includes an insulating bracket, which can reduce the risk of short circuit between the bracket and the battery cell.

[0030] Optionally, in some embodiments of the present application, the battery module further includes an elastic member, which is disposed between the battery cell unit and the shell. The elastic member can apply pressure to the multiple battery cell units, so that the multiple battery cell units are in a pressurized state.

[0031] Optionally, in some embodiments of the present application, the first side portion covers the first bending portion and part of the first connecting portion, which can protect the connection between the first bending portion and the first connecting portion, and further strengthen the protection of the first sealing portion.

[0032] Optionally, in some embodiments of the present application, the second side portion covers the second bending portion and part of the first connecting portion, which can protect the connection between the second bending portion and the first connecting portion, and further strengthen the protection of the first sealing portion.

[0033] An embodiment of the present application further provides an electrical device, comprising the battery module of any of the above embodiments.

[0034] The above-mentioned battery module and electrical equipment cover part of the first sealing part through the bracket, thereby increasing the protection of the first sealing part. By arranging part of the first connecting 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 connecting part, reduces the impact on the sealing of the first sealing part, and is conducive to heat dissipation of the first sealing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic diagram showing a partial structure of a battery cell module in some embodiments.

[0036] FIG2 is a schematic structural diagram of a battery cell from another perspective in some embodiments.

[0037] FIG3 shows a schematic structural diagram of a battery cell in some embodiments.

[0038] FIG4 is a schematic structural diagram of a battery cell viewed along a direction Y′ opposite to the second direction Y in some embodiments.

[0039] FIG5 shows an exploded schematic diagram of a battery cell in some embodiments.

[0040] FIG6 shows a schematic structural diagram of a battery cell observed along a direction Y′ opposite to the second direction Y in some other embodiments.

[0041] FIG7 shows a schematic structural diagram of the battery cell in the embodiment of FIG6 .

[0042] FIG8 shows a schematic structural diagram of a battery cell in some other embodiments.

[0043] FIG9 is a schematic structural diagram of a battery cell and a bracket in some embodiments.

[0044] FIG10 shows a schematic structural diagram of the battery cell and the bracket in the embodiment of FIG9 from another perspective.

[0045] FIG. 11 is a schematic diagram showing a portion of the structure of FIG. 9 in some embodiments.

[0046] FIG12 is a schematic structural diagram of a battery cell and a bracket viewed along a second direction in some embodiments.

[0047] FIG. 13 is a schematic cross-sectional view along II-II in FIG. 9 in some embodiments.

[0048] FIG. 14 is a schematic diagram showing another portion of the structure of FIG. 9 in some embodiments.

[0049] FIG. 15 is a schematic cross-sectional view along line III-III of FIG. 9 in some embodiments.

[0050] FIG16 shows an exploded schematic diagram of a battery module in some embodiments.

[0051] FIG17 shows a schematic structural diagram of electrical equipment in some embodiments.

[0052] Description of the main component symbols: Battery module 100 Battery cell unit 10 Battery cell 11 Battery cell housing 11a Electrode assembly 11b Electrode terminal 11c Main body 111 First housing 111a First recess 1111 Second housing 111b First side 111c Second side 111d First wall 111e Second wall 111f Third wall 111g Fourth wall 111h Second recess 1112 First extended edge 1113 Second extended edge 1114 First sealing portion 112 First connecting portion 112a First bending portion 112b Second bending portion 112c Second sealing portion 113 Bracket 12 First portion 121 First side portion 122 First gap 122a Second side portion 123 Second gap 123a First extension portion124 Second extension portion 125 Second connection portion 126 Second portion 127 First protrusion 110 Third recess 120 Second protrusion 130 Fourth recess 140 Housing 20 Elastic member 30 Electrical device 200 First direction X Second direction Y Third direction Z

[0053] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Unless otherwise defined, the term "plurality" herein, when used to describe the number of components, specifically means that the components are two or more.

[0059] 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.

[0060] For the convenience of description, part of the electrode terminal 11c is not bent.

[0061] Referring to Figures 1 to 5 and Figures 9 and 10, one embodiment of the present application provides a battery module 100 comprising a plurality of battery cell units 10 arranged along a first direction X. Each battery cell unit 10 comprises a battery cell 11 and a bracket 12, which connects the battery cell 11. The battery cell 11 comprises a battery cell housing 11a, an electrode assembly 11b, and an electrode terminal 11c, which connects the electrode assembly 11b and extends from the battery cell housing 11a.

[0062] The cell casing 11a includes a main body 111 and a first sealing portion 112. The electrode assembly 11b is located within the main body 111. The main body 111 and the first sealing portion 112 are aligned along the second direction Y. The first sealing portion 112 includes a first connecting portion 112a, a first bent portion 112b, and a second bent portion 112c. The first connecting portion 112a connects the first bent portion 112b and the second bent portion 112c. The first bent portion 112b and the second bent portion 112c are positioned opposite each other along the third direction Z. The electrode terminal 11c extends from the first connecting portion 112a out of the cell casing 11a.

[0063] The bracket 12 includes a first portion 121, a first side portion 122, and a second side portion 123. The first portion 121 partially covers the first connecting portion 112a, the first side portion 122 covers the first bent portion 112b, and the second side portion 123 covers the second bent portion 112c. When viewed along the first direction X, in the second direction Y, part of the first connecting portion 112a is located between the main body 111 and the first portion 121. In the third direction Z, part of the first connecting portion 112a is located between the first side portion 122 and the second side portion 123. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. By covering part of the first sealing portion 112 with the bracket 12, the protection of the first sealing portion 112 is increased. By arranging part of the first connecting portion 112a between the main body 111 and the first portion 121 and between the first side portion 122 and the second side portion 123, expansion space can be provided for the first sealing portion 112, which is conducive to pressure relief, reduces the impact of the pressure in the battery cell 11 on the first connecting portion 112a, reduces the impact on the sealing of the first sealing portion 112, and is conducive to heat dissipation of the first sealing portion 112.

[0064] In one embodiment, 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 , which can increase the structural strength of the bracket 12 and facilitate protection of the first sealing portion 112 .

[0065] In one embodiment, along the second direction Y, the projection of the electrode assembly 11 b is between the projection of the first side portion 122 and the projection of the second side portion 123. When the pressure in the battery cell 11 needs to be released in a timely manner, by limiting the positions of the first side portion 122 and the second side portion 123, the battery cell 11 can break through the first connecting portion 112 a and a portion of the bracket 12 to release the pressure.

[0066] In one embodiment, the bracket 12 is integrally formed with the battery cell 11, which is beneficial for improving 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.

[0067] In one embodiment, the bracket 12 includes an insulating bracket to reduce the risk of short circuit between the bracket 12 and the battery cell 11 .

[0068] Referring to FIG. 15 , in one embodiment, the first side portion 122 covers the first bending portion 112 b and a portion of the first connecting portion 112 a , thereby protecting the connection between the first bending portion 112 b and the first connecting portion 112 a and further strengthening the protection of the first sealing portion 112 .

[0069] In one embodiment, the second side portion 123 covers the second bending portion 112 c and a portion of the first connecting portion 112 a , thereby protecting the connection between the second bending portion 112 c and the first connecting portion 112 a and further strengthening the protection of the first sealing portion 112 .

[0070] Referring to Figures 5 and 8 , in one embodiment, the main body 111 is provided with a storage space. The main body 111 includes a first shell 111a and a second shell 111b. The first shell 111a has a first recess 1111, and the second shell 111b has a second recess 1112. The first shell 111a is connected to the second shell 111b, forming a storage space. The electrode assembly 11b is partially located in the first recess 1111, and partially located in the second recess 1112. The circumference of the first shell 111a extends outward to form a first extended edge 1113, and the circumference of the second shell 111b extends outward to form a second extended edge 1114. After the first shell 111a is connected to the second shell 111b, the first extended edge 1113 and the second extended edge 1114 overlap and are sealed.

[0071] In one embodiment, the first extended edge 1113 and the second extended edge 1114 overlap and are sealed to form two first sealing portions 112 and two second sealing portions 113. The two first sealing portions 112 are arranged along the second direction Y, and the two second sealing portions 113 are arranged along the third direction Z. 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.

[0072] Referring to FIG. 3 , optionally, the battery cell 11 includes two electrode terminals 11 c , wherein one electrode terminal 11 c extends from one of the first sealing portions 112 out of the battery cell housing 11 a , and the other electrode terminal 11 c extends from the other first sealing portion 112 out of the battery cell housing 11 a .

[0073] 6 to 8 , 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 .

[0074] 6 to 8 , 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 third direction Z, and the first sealing portion 112 connects the two second sealing portions 113.

[0075] Referring to FIG. 6 to FIG. 8 , in one embodiment, the battery cell 11 includes two electrode terminals 11 c . The two electrode terminals 11 c extend from the first sealing portion 112 out of the battery cell housing 11 a .

[0076] Referring to Figures 6 and 7 , in one embodiment, the main body 111 defines a storage space. The main body 111 includes a first housing 111a and a second housing 111b. The first housing 111a defines a first recess 1111, while the second housing 111b is flat. The first housing 111a connects to the second housing 111b to form the storage space. The electrode assembly 11b is located in the first recess 1111.

[0077] 3 and 9 , in one embodiment, the main body 111 includes a first side 111 c and a second side 111 d disposed along a third direction Z, wherein one second sealing portion 113 is disposed on the first side 111 c and another second sealing portion 113 is disposed on the second side 111 d.

[0078] In one embodiment, the main body 111 includes a first wall 111e, a second wall 111f, a third wall 111g, and a fourth wall 111h. The second wall 111f and the first wall 111e are arranged along the second direction Y, and the third wall 111g and the fourth wall 111h are arranged along the first direction X. Optionally, the first sealing portion 112 is connected to the first wall 111e. Optionally, one of the first sealing portions 112 is connected to the first wall 111e, and the other first sealing portion 112 is connected to the second wall 111f.

[0079] In one embodiment, the main body 111 includes two first walls 111e, a second wall 111f, and a first sealing portion 112. The main body 111 is provided with a storage space and includes a first shell 111a and a second shell 111b. The first shell 111a is provided with a first recess 1111, and the second shell 111b is provided with a second recess 1112. The first shell 111a is connected to the second shell 111b, forming a storage space. The electrode assembly 11b is provided in the first recess 1111 and the second recess 1112. Two electrode terminals 11c extend from the same first sealing portion 112 out of the battery cell shell 11a. Optionally, there is one second wall 111f and one first sealing portion 112, with one first wall 111e connecting the third wall 111g and the first sealing portion 112, and the other first wall 111e connecting the fourth wall 111h and the first sealing portion 112. As viewed in a direction opposite to the second direction Y, in the first direction X, the two first walls 111e are located on opposite sides of the first sealing portion 112. Optionally, there are two second walls 111f and two first sealing portions 112, one of the first walls 111e connecting the third wall 111g and the first sealing portion 112, and the other first wall 111e connecting the fourth wall 111h and the first sealing portion 112. As viewed in a direction opposite to the second direction Y, in the first direction X, the two first walls 111e are connected and located on opposite sides of the first sealing portion 112. One of the second walls 111f connects the third wall 111g and the other first sealing portion 112, and the other second wall 111f connects the fourth wall 111h and the other first sealing portion 112. As viewed in the second direction Y, in the first direction X, the two second walls 111f are located on opposite sides of the first sealing portion 112.

[0080] Referring to Figures 6 and 7, in one embodiment, the main body 111 includes a first wall 111e, a second 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 111a and a second shell 111b. The first shell 111a is provided with a first recess 1111, and the second shell 111b is flat. The first shell 111a is connected to the second shell 111b to form a storage space. The electrode assembly 11b is provided in the first recess 1111. 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 first wall 111e connects the third wall 111g and the first sealing portion 112, and the second wall 111f connects the third wall 111g. Optionally, there are two first sealing portions 112. The first wall 111 e connects the third wall 111 g and the first sealing portion 112 , and the second wall 111 f connects the third wall 111 g and the other first sealing portion 112 .

[0081] Referring to Figure 3, in one embodiment, the main body 111 includes two first walls 111e, two second walls 111f, and two first sealing portions 112. One of the first walls 111e connects the third wall 111g and the first sealing portion 112, and the other first wall 111e connects the fourth wall 111h and the first sealing portion 112. One of the second walls 111f connects the third wall 111g and the other first sealing portion 112, and the other second wall 111f connects the fourth wall 111h and the other first sealing portion 112. One of the electrode terminals 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.

[0082] In the first direction X, the two first walls 111 e are connected to opposite sides of the first sealing portion 112 as viewed along the direction Y′ opposite to the second direction Y. In the first direction X, the two second walls 111 f are located on opposite sides of the second sealing portion 113 as viewed along the second direction Y.

[0083] In one embodiment, the main body 111 includes a first wall 111e, a second wall 111f, and two first sealing portions 112. The first wall 111e connects the third wall 111g and the first sealing portion 112, while the second wall 111f connects the third wall 111g and the other first sealing portion 112. The main body 111 defines a storage space and includes a first shell 111a and a second shell 111b. The first shell 111a defines a first recess 1111, while the second shell 111b is flat. The first shell 111a connects to the second shell 111b, forming a storage space. The electrode assembly 11b is located in the first recess 1111. One electrode terminal 11c extends from one of the first sealing portions 112 out of the cell housing 11a, while the other electrode terminal 11c extends from the other first sealing portion 112 out of the cell housing 11a.

[0084] Referring to Figures 1 and 2 , in one embodiment, adjacent main bodies 111 are in contact and connected, facilitating pressurization of the main bodies 111. Optionally, the third wall 111g of the cell casing 11a is in contact and connected to the fourth wall 111h of the adjacent cell casing 11a. Optionally, the third wall 111g of the cell casing 11a is in contact and connected to the third wall 111g of the adjacent cell casing 11a, and the fourth wall 111h of the cell casing 11a is in contact and connected to the fourth wall 111h of the adjacent cell casing 11a.

[0085] In one embodiment, adjacent battery cell casings 11 a exert pressure on each other, so that the plurality of battery cell units 10 are in a pressurized state, which is beneficial for improving the service life of the battery cell units 10 .

[0086] Referring to Figures 9 to 14, in one embodiment, the bracket 12 includes a first extension portion 124. The first extension portion 124 extends from the first side portion 122 along a direction Y' opposite to the second direction Y. The first extension portion 124 covers the first side edge 111c and the second sealing portion 113, thereby protecting the main body 111 and the second sealing portion 113 and increasing the connection strength between the bracket 12 and the battery cell 11.

[0087] Optionally, in the second direction Y, a portion of the first side 111c and a portion of the second sealing portion 113 are provided with a first extension portion 124, which can protect part of the main body 111 and part of the second sealing portion 113, increase the connection strength between the bracket 12 and the battery cell 11, and facilitate the bracket 12 to be integrally formed in the battery cell 11.

[0088] Optionally, in the second direction Y, the entire first side 111c and the entire second sealing portion 113 are provided with a first extension portion 124, which can better protect the main body 111 and the second sealing portion 113 and better increase the connection strength between the bracket 12 and the battery cell 11.

[0089] In one embodiment, as viewed along a direction Y' opposite to the second direction Y, in the first direction X, the first side portions 122 do not extend beyond the first extension portion 124, and a first gap 122a is formed between adjacent first side portions 122. When adjacent battery cell casings 11a are in contact and pressure is applied to each other, the first gap 122a between two adjacent first side portions 122 can reduce the force acting on the first side portions 122, thereby reducing the force acting on the first sealing portion 112, thereby facilitating protection of the first sealing portion 112. The first gap 122a also facilitates heat dissipation from the battery cell 11.

[0090] In one embodiment, the bracket 12 includes a second extension 125 extending from the second side portion 123 in a direction Y' opposite to the second direction Y. The second extension 125 covers the second side edge 111d and the other second sealing portion 113, thereby protecting the main body 111 and the other second sealing portion 113 and further strengthening the connection strength between the bracket 12 and the battery cell 11. When viewed along the first direction X, in the third direction Z, the main body 111 is located between the first extension 124 and the second extension 125.

[0091] Optionally, in the second direction Y, a portion of the second side 111d and a portion of the other second sealing portion 113 are provided with a second extension portion 125, which can protect part of the main body 111 and part of the second sealing portion 113, increase the connection strength between the bracket 12 and the battery cell 11, and facilitate the bracket 12 to be integrally formed in the battery cell 11.

[0092] Optionally, in the second direction Y, the entire second side 111d and the entire other second sealing portion 113 are provided with a second extension portion 125, which can better protect the main body 111 and the second sealing portion 113 and better increase the connection strength between the bracket 12 and the battery cell 11.

[0093] In one embodiment, as viewed along a direction Y' opposite to the second direction Y, in the first direction X, the second side portions 123 do not extend beyond the second extension portion 125, and a second gap 123a is formed between adjacent second side portions 123. When adjacent battery cell casings 11a are in contact and apply pressure to each other, the second gap 123a between two adjacent second side portions 123 reduces the force acting on the second side portions 123, thereby further reducing the force acting on the first sealing portion 112, further facilitating protection of the first sealing portion 112. The second gap 123a also facilitates heat dissipation from the battery cell 11.

[0094] Referring to Figures 1 and 9 , in some embodiments, along a first direction X, the bracket 12 includes a first protrusion 110 and a third recess 120. The third recess 120 is disposed on the first extension 124, and the first protrusion 110 extends from the first extension 124. When the main bodies 111 of adjacent battery cells 11 are in contact and connected, the first protrusion 110 is disposed within the third recess 120 of the adjacent bracket 12, with a gap being provided between the first protrusion 110 and the third recess 120. The third recess 120 and the first protrusion 110 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 110 and the third recess 120 reduces the stress on 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.

[0095] In some embodiments, along the first direction X, the bracket 12 includes a second protrusion 130 and a fourth recess 140. The fourth recess 140 is disposed in the second extension 125, and the second protrusion 130 extends from the second extension 125. When the main bodies of adjacent battery cells 11 are in contact and connected, the second protrusion 130 is disposed 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 adjacent brackets 12, further reducing the offset of adjacent main bodies 111 and further facilitating mutual pressure between the multiple main bodies 111. The gap between the second protrusion 130 and the fourth recess 140 reduces the force applied to the bracket 12, further improving the protection of the first sealing portion 112 and further increasing the connection strength between the bracket 12 and the battery cell 11.

[0096] Referring to Figures 9 to 12, in one embodiment, the bracket 12 includes a second connecting portion 126, which covers a portion of the first wall 111e and protects the main body 111. The first portion 121 is connected to the first side portion 122 at one end and to the second side portion 123 at the other end. The second connecting portion 126 is connected to the first side portion 122 at one end and to the second side portion 123 at the other end, further increasing the structural strength of the bracket 12 and facilitating protection of the first sealing portion 112. The second connecting portion 126, the first portion 121, the first side portion 122, and the second side portion 123 together form a first space 12a, with a portion of the first connecting portion 112a located in the first space 12a. The first portion 121, the first side portion 122, the second side portion 123, and the second connecting portion 126 protect the periphery of the first connecting portion 112a, minimizing the impact of battery cell 11 expansion on the sealing of the first sealing portion 112. The first space 12a also dissipates heat from the battery cell 11.

[0097] In one embodiment, as viewed along a direction Y' opposite to the second direction Y, in the first direction X, the second connecting portion 126 is located between the third wall 111g and the fourth wall 111h. The second connecting portion 126 does not extend beyond the third wall 111g in the first direction X, and the second connecting portion 126 does not extend beyond the fourth wall 111h in the first direction X. When adjacent battery cell casings 11a are in contact and connected, gaps exist between adjacent second connecting portions 126. This reduces the impact of pressure exerted between adjacent battery cell casings 11a on the second connecting portions 126, reduces the force acting on the first sealing portion 112, and facilitates protection of the first sealing portion 112 and enhances the stability of the connection between the bracket 12 and the battery cell 11.

[0098] In some embodiments, the main body 111 includes a plurality of first walls 111e, and the bracket 12 correspondingly includes a plurality of second connection portions 126. Optionally, some of the first walls 111e are provided with second connection portions 126. Optionally, each first wall 111e is provided with a second connection portion 126.

[0099] Referring to Figures 9 to 13 , in one embodiment, the bracket 12 includes a second portion 127 connected to the side of the second connecting portion 126 facing the first portion 121. The second portion 127 extends from the second connecting portion 126 along the second direction Y and covers a portion of the first connecting portion 112a. The second portion 127 supports and protects the portion of the first sealing portion 112 extending beyond the second connecting portion 126, minimizing damage to the first sealing portion 112 and potentially affecting the sealing performance of the battery cell 11.

[0100] In some embodiments, the main body 111 includes a plurality of first walls 111e, and the bracket 12 includes a plurality of second portions 127 and a plurality of second connecting portions 126. Optionally, some of the second portions 127 are connected to the second connecting portions 126. Optionally, each second portion 127 is connected to one second connecting portion 126.

[0101] In one embodiment, the battery cell 11 includes an electrolyte, which is disposed in the battery cell housing 11a. The electrode assembly 11b includes a first electrode sheet, a diaphragm, and a second electrode sheet, and the electrode assembly is formed by winding or stacking the first electrode sheet, the diaphragm, and the second electrode sheet. Part of the electrolyte infiltrates the first electrode sheet, the diaphragm, and the second electrode sheet to conduct ions, and part of the electrolyte adheres to the surface of the battery cell housing 11a and / or the surface of the electrode assembly 11b in a free state. The electrolyte in the free state is a free electrolyte. When multiple battery cells 11 are circulated, the free electrolyte in the battery cell 11 will be squeezed. The present application provides expansion space for the first sealing portion 112 through the first space 12a to reduce the impact of the expansion of the battery cell 11 on the sealing of the first sealing portion 112.

[0102] Referring to Figures 9 to 14 , in one embodiment, the battery cell unit 10 includes two brackets 12 , one of which is connected to a portion of the first sealing portion 112 , and the other bracket 12 is connected to a portion of the other first sealing portion 112 . One electrode terminal 11 c extends along a second direction Y between the first sealing portion 112 and the bracket 12 , while the other electrode terminal 11 c extends along a direction opposite to the second direction Y between the second sealing portion 113 and the bracket 12 .

[0103] The two brackets 12 increase the protection of the first sealing portion 112 and the second sealing portion 113, provide expansion space for the first sealing portion 112, reduce the impact of gas production and / or free electrolyte in the battery cell 11 on the sealing of the first sealing portion 112, and facilitate heat dissipation of the first sealing portion 112.

[0104] Please refer to FIG. 16 . In one embodiment, the battery module 100 further includes a housing 20 . The battery cell unit 10 is disposed in the housing 20 . When the battery cell unit 10 is disposed in the housing 20 , it is in a pressurized state.

[0105] In one embodiment, the battery module 100 further includes an elastic member 30 , which is disposed between the battery cell unit 10 and the housing 20 . The elastic member 30 can apply pressure to the multiple battery cell units 10 , placing the multiple battery cell units 10 in a pressurized state.

[0106] Referring to FIG. 17 , the present application further provides an electrical device 200 employing 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.

[0107] 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, the electrode terminal being connected to the electrode assembly and led out from the battery cell shell; The battery cell housing comprises a main body and a first sealing portion, the electrode assembly is arranged on the main body, the first sealing portion comprises a first connecting portion, a first bending portion and a second bending portion, the first connecting portion connects the first bending portion and the second bending portion, the first bending portion and the second bending portion are arranged opposite to each other along a third direction, and the electrode terminal extends from the first connecting portion out of the battery cell housing; The bracket includes a first portion, a first side portion, and a second side portion, the first portion covers a portion of the first connecting portion, the first side portion covers the first bending portion, the second side portion covers the second bending portion, and the electrode terminal extends from the first portion; Observed along the first direction, in the second direction, part of the first connecting portion is located between the main body and the first 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.

2. The battery module according to claim 1, characterized in that: The bracket includes a first extension portion extending from the first side portion, the main body includes a first side edge, and the first extension portion covers at least a portion of the first side edge.

3. The battery module according to claim 2, characterized in that: The bracket includes a second extension portion extending from the second side portion, the main body includes a second side edge, the first side edge and the second side edge are arranged opposite to each other along the third direction, and the second extension portion covers at least a portion of the second side edge.

4. The battery module according to claim 3, characterized in that: The cell housing comprises two second sealing portions arranged along the third direction, wherein one of the second sealing portions is arranged at the first side edge, and the other second sealing portion is arranged at the second side edge; The first extending portion covers at least a portion of the second sealing portion, and the second extending portion covers at least a portion of another second sealing portion.

5. The battery module according to claim 3, characterized in that: Viewed from a direction opposite to the second direction, in the first direction, the first side portion does not extend beyond the first extension portion, and the second side portion does not extend beyond the second extension portion.

6. The battery module according to any one of claims 1 to 5, characterized in that: The main body includes a first wall, the first connecting portion is connected to the first wall, and the bracket includes a second connecting portion, and the second connecting portion covers a portion of the first wall.

7. The battery module according to claim 6, characterized in that: The bracket includes a second portion extending from the second connecting portion along the second direction, the second portion and the first portion are arranged opposite to each other along the second direction, and the second portion covers a portion of the first connecting portion.

8. The battery module according to claim 6 or 7, characterized in that: When viewed along the first direction, part of the first connecting portion is located in a first space formed by the second connecting portion, the first portion, the first side portion, and the second side portion.

9. The battery module according to any one of claims 1 to 8, characterized in that: Along the second direction, a projection of the electrode assembly is between a projection of the first side portion and a projection of the second side portion.

10. The battery module according to any one of claims 1 to 9, characterized in that: The bracket is integrally formed on the battery core.

11. The battery module according to any one of claims 1 to 10, characterized in that: The battery cell contains an electrolyte, and part of the electrolyte is attached to the inner wall of the battery cell shell and / or the electrode assembly in a free state.

12. The battery module according to any one of claims 1 to 11, characterized in that: The main body includes a first shell and a second shell, the first shell is provided with a first recess, the second shell is provided with a second recess, the first shell is connected to the second shell, and a receiving space is formed, and part of the electrode assembly is provided in the first recess, and part of the electrode assembly is provided in the second recess.

13. The battery module according to any one of claims 1 to 11, characterized in that: The main body includes a first shell and a second shell, the first shell is provided with a first recessed portion, the second shell is flat, the first shell is connected to the second shell and forms a receiving space, and the electrode assembly is provided in the first recessed portion.

14. The battery module according to any one of claims 1 to 13, characterized in that: The battery cell shell includes two first sealing parts, which are arranged along the second direction. The battery cell includes two electrode terminals, one of which extends out of the battery cell shell from the first sealing part, and the other electrode terminal extends out of the battery cell shell from the other first sealing part.

15. The battery module according to any one of claims 1 to 13, characterized in that: The battery cell includes two electrode terminals, and the two electrode terminals extend out of the battery cell housing from the same first sealing portion.

16. The battery module according to claim 6, characterized in that: The main body includes a second wall, a third wall and a fourth wall, the second wall and the first wall are arranged along the second direction, and the third wall and the fourth wall are arranged along the first direction; when viewed in a direction opposite to the second direction, in the first direction, the second connecting portion is located between the third wall and the fourth wall.

17. The battery module according to any one of claims 1 to 16, characterized in that: The main bodies of adjacent battery cell casings are in contact and connected.

18. The battery module according to any one of claims 1 to 17, characterized in that: There is pressure between the main body parts of the adjacent battery cell casings.

19. The battery module according to any one of claims 1 to 18, characterized in that: A first gap is formed between adjacent first side portions.

20. The battery module according to claim 19, characterized in that: A second gap is formed between adjacent second side portions.

21. The battery module according to any one of claims 1 to 20, characterized in that: The support includes an insulating support.

22. An electrical equipment, characterized in that: Comprising a battery module as described in any one of claims 1-21.

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