Battery modules and electrical equipment

Abstract

This application provides a battery module and an electrical equipment, the battery module comprising a first member, a second member, and 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 a cell housing, an electrode assembly provided in the cell housing, and electrode terminals. The cell housing comprises a main body and a first seal portion. The electrode terminals protrude out of the cell housing from the first seal portion. The main bodies of adjacent battery cells are in contact with each other and connected. The cell housing comprises a first wall, a second wall, a third wall, and a fourth wall. The first wall and the second wall are provided opposite each other along a second direction. The third wall and the fourth wall are provided opposite each other along a first direction. The bracket comprises a first portion. The first portion covers at least a portion of the first wall. When viewed from a second direction, the first portion shall not extend beyond the third wall in the first direction, and the first portion shall not extend beyond the fourth wall. The first member and the second member are configured to restrict the battery cells from moving away from each other. Battery modules can improve the energy density of the battery module.

Description

Technical Field

[0001] This application relates to the field of batteries, and more particularly to battery modules and electrical equipment.

Background Art

[0002] Battery modules increase their lifespan through pressurization design. Currently, pressurization is achieved by filling elastic materials such as foam between adjacent battery cells. However, the filling of elastic materials occupies space, increases costs, and reduces the energy density of the battery module.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of the above problems, there is a need to provide a battery module and electrical equipment that improve energy density.

[0004] This application provides a battery module comprising a first member, a second member, and 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 includes a cell housing, an electrode assembly, and electrode terminals, the electrode assembly being located in the cell housing, and the electrode terminals being connected to the electrode assembly and extending from the cell housing. The cell housing comprises a body portion and a first seal portion. The electrode terminals protrude out of the cell housing from the first seal portion. The cell housing, into which the body portions of adjacent battery cells contact and connect, comprises a first wall, a second wall, a third wall, and a fourth wall. The first and second walls are provided opposite each other along a second direction. The third and fourth walls are provided opposite each other along a first direction. The bracket comprises a first portion. The first portion covers at least a portion of the first wall. When viewed from a second direction, the first portion shall not extend beyond the third wall in the first direction, and the first portion shall not extend beyond the fourth wall. Along the first direction, the first and second members are positioned on both sides of the battery cell unit. The first member is configured to restrict the battery cells from moving away from each other, and the second member is configured to restrict the battery cells from moving away from each other.

[0005] In the above-described battery module, 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, and adjacent battery cells are in contact with each other via their main bodies, allowing them to apply pressure to one another. The first and second members restrict the separation of multiple battery cell units, reducing the amount of buffer material needed to secure cell expansion space between adjacent battery cells, thereby reducing the occupied space and, as a result, improving the energy density of the battery module.

[0006] Furthermore, in some embodiments of the present application, when viewed from a second direction, the first portion is positioned between the third and fourth walls in the first direction, adjacent brackets are installed separately, and the stress on the first seal portion is reduced when the bodies of adjacent battery cells are pressurized against each other, thereby improving protection of the first seal portion.

[0007] Furthermore, in some embodiments of the present invention, each of the main body parts of the battery cell is under pressure, thereby improving the lifespan of the battery cell.

[0008] In some embodiments of the present application, the battery cell unit includes two brackets. The cell housing comprises two first sealing portions. The electrode terminals protrude out of the cell housing from the two first sealing portions. Each first sealing portion is protected by being covered by a bracket.

[0009] Furthermore, in some embodiments of the present invention, the second member is positioned to apply pressure to a plurality of battery cell units and to provide an expansion space for the battery cell units.

[0010] Furthermore, in some embodiments of the present invention, the battery module includes a housing. The electrode assembly is placed in the housing. The second member has a base and a bent portion, the base being connected to the bent portion, which is fixed to the housing. The base is positioned to apply pressure to the battery cell unit, and the bent portion is positioned to provide expansion space to the battery cell unit, thereby buffering the pressure on the battery cell unit and reducing its impact on the battery module's lifespan. By continuously applying pressure to the battery cell unit with the base, the battery cell unit maintains a pressurized state and maintains dynamic equilibrium, thereby promoting an improved lifespan for the battery module.

[0011] Furthermore, in some embodiments of the present application, the bent portion includes a first bent portion and a second bent portion arranged in a third direction. The first bent portion connects one side of the base, the second bent portion connects the other side of the base, and the first and second bent portions provide an expansion space for the battery cell unit.

[0012] Furthermore, in some embodiments of the present application, the second member includes a first connecting portion. The first connecting portion is connected to the side away from the base of the first bent portion and fixed to the housing, thereby transmitting the biasing force acting on the bent portion to the housing.

[0013] Furthermore, in some embodiments of the present application, the first connecting portion is parallel to the base and contributes to the deformation of the second member in the first direction.

[0014] Furthermore, in some embodiments of the present application, the bent portion includes a first bent segment and a second bent segment. The first bent segment is connected to the base and the second bent segment, and the second bent segment is connected to the first bent segment.

[0015] Furthermore, in some embodiments of the present application, the first bent segment and the base form a first angle A1, and the second bent segment and the first connecting portion form a second angle B1, and A1 ≥ B1, which is advantageous in increasing the deformation resistance of the first bent segment and reducing the risk of the second member deforming in the first direction.

[0016] Furthermore, in some embodiments of the present invention, the first and second bent segments form a third angle C1, and since C1 > A1, it is advantageous to promote uniform deformation of the first bent segment.

[0017] Furthermore, in some embodiments, having C1=2B1=2A1 is advantageous in further promoting uniform deformation of the first bent portion.

[0018] Furthermore, in some embodiments of the present application, the second member includes a second connecting portion. The second connecting portion is connected to the side away from the base of the second bent portion. The connection of the second connecting portion to the housing transmits the biasing force acting on the bent portion to the housing.

[0019] Furthermore, in some embodiments of the present invention, the second connecting portion is parallel to the base portion, thereby contributing to the deformation of the second member in the first direction X.

[0020] Furthermore, in some embodiments of the present invention, the first bent portion and the second bent portion have the same structure, thereby uniformly distributing stress and promoting uniform deformation.

[0021] Furthermore, in some embodiments of the present invention, the housing comprises a first side wall, a second side wall, a top wall, and a bottom wall, the first side wall being connected to the top wall and the bottom wall, the second side wall being connected to the top wall and the bottom wall, the first member, the housing, and the second member forming a housing space, and the battery cell unit being installed in the housing space.

[0022] In some embodiments of the present invention, the battery module has a front wall, and the housing has a first side wall, a second side wall, a top wall, and a bottom wall, with the front wall connected to the first side wall, the second side wall, the top wall, and the bottom wall. The first member and the front wall are provided along a first direction X, and the first member, the front wall, and the housing form a housing space. The second member is located along the first direction X between a plurality of battery cell units and the front wall, and the second member is located within the housing space.

[0023] In some embodiments of the present application, the first seal portion includes a first connector, a second connector, and a third connector. The second and third connectors are arranged opposite each other along a third direction. The second connector is connected to the third connector via the first connector. The bracket protects the first seal portion by covering at least a portion of the second connector, the third connector, and the first connector.

[0024] In some embodiments of the present application, the bracket includes a second portion, a first side portion, and a second side portion. The second portion covers at least a portion of the first connection portion. The first side portion covers the second connection portion. The second side portion protects the first seal portion by covering the third connection portion.

[0025] Furthermore, in some embodiments of the present application, when viewed from a second direction, the second portion is positioned between the third wall and the fourth wall in the first direction. When the bodies of adjacent battery cells exert pressure on each other, the force applied to the first seal portion is reduced, improving the protective performance of the first seal portion.

[0026] In some embodiments of the present application, when observed from the second direction, the first side portion is located between the third wall and the fourth wall in the first direction. When the main body portions of adjacent battery cells apply pressure to each other, the force applied to the first seal portion is reduced, and the protection performance for the first seal portion is improved.

[0027] In some embodiments of the present application, when observed from the second direction, the second side portion is disposed between the third wall and the fourth wall in the first direction. When the main body portions of adjacent battery cells apply pressure to each other, the force applied to the first seal portion is reduced, and the protection performance for the first seal portion is improved.

[0028] In some embodiments of the present application, when observed from the first direction, a part of the first connection portion is disposed between the main body portion and the first portion in the second direction, and a part of the first connection portion is disposed between the first side portion and the second side portion in the third direction. The bracket covers a part of the first seal portion and strengthens the protection for the first seal portion. By disposing a part of the first connection portion between the main body portion and the first portion, and between the first side portion and the second side portion, an expansion space for the first connection portion is secured, the release of pressure becomes easy, the influence of the pressure in the battery cell on the first connection portion is reduced, the influence on the sealing performance of the first seal portion is minimized, and the heat dissipation from the first seal portion is promoted.

[0029] In some embodiments of the present application, the electrode assembly has a wound structure and includes a first flat portion, a second flat portion, a first curved portion, and a second curved portion. The first flat portion connects the first curved portion and the second curved portion. The second flat portion connects the first curved portion and the second curved portion. Along the first direction, the projection of the third wall overlaps and covers the projection of the first flat portion, and the projection of the fourth wall covers the projection of the second flat portion, so that a uniform pressure is more likely to be applied between the battery cells, and the lifespan of the battery cells is further improved.

[0030] Furthermore, in some embodiments of the present invention, the projection of the first side portion and the projection of the first curved portion overlap along the second direction, the projection of the first side portion and the projection of the first flat portion are separated, and the projection of the first side portion and the projection of the second flat portion are separated, which is advantageous for pressure release of the battery cell.

[0031] Furthermore, in some embodiments of the present invention, along the second direction, the projection of the second side portion and the projection of the second curved portion overlap, while the projection of the second side portion and the projection of the first flat portion are separated. This separation of the projection of the second side portion and the projection of the second flat portion is advantageous for pressure release of the battery cell.

[0032] Furthermore, in some embodiments of the present application, the second gap between adjacent first sides reduces the forces acting on the first side and the first seal, thereby protecting the first seal. The second gap also facilitates heat dissipation from the battery cell.

[0033] Furthermore, in some embodiments of the present application, the third gap between two adjacent second sides reduces the force acting on the second sides, thereby further reducing the force acting on the first seal and further protecting the first seal, and the third gap also facilitates heat dissipation from the battery cell.

[0034] In some embodiments of the present application, the bracket includes a first extension, which extends from the first side along a second direction. The main body comprises a fifth wall, which protects a portion of the main body and the second seal by covering a portion of the fifth wall, thereby reinforcing the connection between the bracket and the battery cell.

[0035] Furthermore, in some embodiments of the present application, the bracket comprises a third recess and a first protrusion. The first protrusion is provided within the third recess of an adjacent bracket. A fourth gap is provided between the first protrusion and the third recess along the first direction, thereby reducing stress on the bracket, improving protection for the first seal, and increasing the connection strength between the bracket and the battery cell.

[0036] Furthermore, in some embodiments of the present invention, the second extension is provided with a second protrusion and a fourth recess, the second protrusion being positioned within the fourth recess of the adjacent bracket, and a fifth gap being provided between the second protrusion and the fourth recess. The fourth recess and the second protrusion position the adjacent brackets, further reducing the offset of adjacent main bodies and facilitating mutual pressure between multiple main bodies. The fifth gap further reduces stress on the bracket, further enhancing the protective performance of the first seal and further increasing the connection strength between the bracket and the battery cell.

[0037] Furthermore, in some embodiments of the present invention, the bracket is integrally molded with the battery cell, which helps to strengthen the connection between the bracket and the battery cell.

[0038] Furthermore, in some embodiments of the present invention, the bracket is an insulating bracket, which can reduce the risk of short circuits with the battery cells.

[0039] Furthermore, in some embodiments of the present application, the housing comprises a first stopper portion and a second stopper portion. The bracket is positioned between the first stopper portion and the second stopper portion along a second direction. The first stopper portion and the second stopper portion can restrict the movement of the bracket in the second direction and are advantageous for the movement of the bracket in the first direction.

[0040] Furthermore, in some embodiments of the present application, the housing includes a third stopper portion and a fourth stopper portion. Also, in some embodiments of the present application, the bracket is located between the third stopper portion and the fourth stopper portion. The third stopper portion and the fourth stopper portion can restrict the movement of the bracket in a second direction and are advantageous for the movement of the bracket in a first direction.

[0041] One embodiment of the present invention provides an electrical equipment having a battery module according to any of the above embodiments.

[0042] In the above-described battery module and electrical equipment, 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, and adjacent battery cells are in contact with each other via their main bodies, allowing them to apply pressure to one another. The first and second members restrict the separation of multiple battery cell units, reducing the amount of buffer material needed to secure cell expansion space between adjacent battery cells, thereby reducing the occupied space and, as a result, improving the energy density of the battery module. [Brief explanation of the drawing]

[0043] [Figure 1] This is a schematic diagram of an exploded view of a battery module according to several embodiments. [Figure 2] This is a schematic diagram of a part of the structure of a battery module according to several embodiments. [Figure 3] This is a schematic diagram of the structure of a battery cell unit according to several embodiments. [Figure 4] This is a schematic diagram of the structure of a battery cell unit from a different perspective, relating to several embodiments. [Figure 5] This is an enlarged schematic diagram of a portion of a battery cell unit in several embodiments. [Figure 6] This is a schematic diagram of the battery cell configuration in several embodiments. [Figure 7] This is a schematic diagram of the structure of a battery cell as viewed along the second direction Y in several embodiments. [Figure 8] These are schematic diagrams of disassembled battery cells in several embodiments. [Figure 9] This figure shows a schematic configuration of a battery cell in another embodiment. [Figure 10] Furthermore, this is a schematic diagram of the battery cell structure as viewed along the second direction Y in another embodiment. [Figure 11] Furthermore, this is a schematic diagram of the battery cell structure from a different perspective relating to another embodiment. [Figure 12] These are schematic diagrams of the electrode assembly structure in several embodiments. [Figure 13]These are schematic diagrams illustrating the structure of a battery cell and bracket in several embodiments. [Figure 14] This is a schematic diagram of the structure of a battery cell and bracket from a different perspective, relating to several embodiments. [Figure 15] This is a schematic diagram of the structure of a battery cell and bracket from a different perspective relating to several embodiments. [Figure 16] This is a schematic diagram of the structure of a battery cell and bracket from yet another perspective relating to several embodiments. [Figure 17] This is a schematic cross-sectional view along line AA in Figure 13. [Figure 18] Figure 13 is a schematic diagram of the structure of a battery cell and part of the bracket. [Figure 19] Figure 13 is a schematic diagram of the battery cell and other parts of the bracket structure. [Figure 20] This is a schematic diagram of a portion of the housing structure according to several embodiments. [Figure 21] This is a schematic diagram of the structure of the second member in several embodiments. [Figure 22] These are schematic diagrams illustrating the structure of electrical equipment in several embodiments. [Explanation of symbols]

[0044] Battery module 100 Battery cell unit 10 Battery cell 11 Cell housing 11a Main body 111 1st wall 111a 2nd wall 111b 3rd wall 111c 4th wall 111d 5th wall 111e 6th wall 111f Housing 1, 1111 First recess 1111a Housing 2, 1112 Second recess 1112a First extension edge 1113 Second extension edge 1114 First seal section 112 First connection section 112a Second connection section 112b Third connection section 112c Second seal section 113 Electrode assembly 11b 1st flat section 1116 2nd flat section 1117 First curved section 1118 Second curved section 1119 Electrode terminal 11c Bracket 12 First gap 12a 4th gap 12b Fifth gap 12c Part 1 121 Part 2 122 First side portion 123 Second gap 123a Second side section 124 Third gap 124a 1st extension 125 Third recess 1251 First protrusion 1252 2nd extension 126 Fourth recess 1261 Second protrusion 1262 Third part 127 First elastic member 101 Second elastic member 102 First component 20 Second component 30 base 31 Folded section 32 First folding section 321 First bent segment 321a Second bent segment 321b Second folding section 322 Third bent segment 322a Fourth bend segment 322b 1st connection part 323 2nd connecting part 324 Housing 40 First side wall 41 1st fixed part 411 Second side wall 42 2nd fixed part 421 Ceiling Wall 43 Bottom wall 44 Third fixed part 443 front wall 45 1st stopper section 441 Second stopper section 442 Third stopper section 431 4th Stopper Section 432 Sampling line 50 Circuit board 60 Electrical equipment 200 1st direction Second direction Y 3rd direction Z

[0045] This application will be further described in the following specific embodiments in conjunction with the drawings above. [Modes for carrying out the invention]

[0046] The following embodiments are illustrative and not restrictive, but are intended to provide a basic understanding of this application and do not confirm the essence or definitive elements of this application or limit the scope of protection. Unless there is a structural inconsistency, the technical features mentioned in each embodiment may be combined in any way.

[0047] If one element is considered to be "provided" to another element, it may be provided directly to the other element or provided to the other element via another element. If one element is considered to be "connected" to another element, it may be connected directly to the other element or connected to the other element via another element.

[0048] The terms “perpendicular” and “equal” are used to describe the ideal state between two parts. In actual manufacturing or use, two parts are approximately perpendicular or equal to each other. For example, numerically speaking, perpendicular means that the angle between two straight lines is within the range of 90° ± 10°, the dihedral angle between two planes is within the range of 90° ± 10°, or the angle between a straight line and a plane is within the range of 90° ± 10°. Two parts described as “perpendicular” do not have to be absolute straight lines or planes; they may be approximately straight lines or planes, but if the overall direction of extension is a straight line or plane when viewed macroscopically, then the parts are considered to be “straight lines” or “planes.”

[0049] The term "parallel" is used to describe the ideal state between two parts. In actual manufacturing or use, two parts are in a state of being approximately parallel to each other. For example, numerically speaking, parallel means that the angle between two straight lines is within the range of 180° ± 10°, the dihedral angle between two planes is within the range of 180° ± 10°, or the angle between a straight line and a plane is within the range of 180° ± 10°. Two parts described as "parallel" do not have to be absolute straight lines or planes; they may be approximately straight lines or planes, but if the overall extension direction is a straight line or plane when viewed macroscopically, then the parts are considered to be "straight lines" or "planes".

[0050] Unless otherwise defined, the term “multiple” as used herein to express the number of components means, in particular, that there are two or more components.

[0051] The first direction X includes the first direction X and its opposite direction, the second direction Y includes the second direction Y and its opposite direction, and the third direction Z includes the third direction Z and its opposite direction.

[0052] To simplify the explanation, in Figures 3 to 11 and Figures 13 to 19, the electrode terminal 11c is not bent.

[0053] Referring to Figures 1 to 6, Figure 13, and Figure 14, one embodiment of the present invention provides a battery module 100 comprising a plurality of battery cell units 10 arranged along a first direction X, a first member 20, and a second member 30. Each battery cell unit 10 comprises a battery cell 11 and a bracket 12 for connecting the battery cells 11. The battery cell 11 comprises a cell housing 11a, an electrode assembly 11b, and an electrode terminal 11c connected to the electrode assembly 11b and extending from the cell housing 11a. The cell housing 11a comprises a main body portion 111 and a first seal portion 112 extending from the main body portion 111. The electrode assembly 11b is located within the main body portion 111, and the electrode terminal 11c extends from the first seal portion 112 into the cell housing 11a. The main bodies 111 of adjacent battery cells 11 are in contact with each other and the electrode terminals 11c of two adjacent battery cells 11 are bent and connected to each other.

[0054] The main body 111 comprises a first wall 111a, a second wall 111b, a third wall 111c, and a fourth wall 111d. Along the second direction Y, the first wall 111a and the second wall 111b are arranged opposite each other. Along the first direction X, the third wall 111c and the fourth wall 111d are arranged opposite each other. The second direction Y is perpendicular to the first direction X.

[0055] Bracket 12 includes a first portion 121 that covers at least a part of the first wall 111a. When viewed from a second direction Y, in the first direction X, the first portion 121 must not extend beyond the third wall 111c, and the first portion 121 must not extend beyond the fourth wall 111d.

[0056] Along the first direction X, the first member 20 and the second member 30 are positioned on both sides of the battery cell unit 10. The first member 20 is configured to restrict the battery cells 11 from moving away from each other, and the second member 30 is configured to restrict the battery cells 11 from moving away from each other.

[0057] In the above-described battery module 100, in the first direction X, 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, and adjacent battery cells 11 are in contact with each other via their main bodies 111, allowing them to apply pressure to one another. The first member 20 and the second and 30 restrict the separation of the multiple battery cell units 10, reducing the amount of buffer material needed to secure expansion space for the battery cells 11 between adjacent battery cells 11, thereby reducing the occupied space and, as a result, improving the energy density of the battery module 100.

[0058] In some embodiments, the bracket 12 is integrally molded with the battery cell 11, which helps to strengthen the connection between the bracket 12 and the battery cell 11. Alternatively, the bracket 12 is integrally molded with the battery cell 11 by low-pressure injection molding.

[0059] In some embodiments, the bracket 12 is an insulating bracket, which can reduce the risk of short circuits with the battery cell 11.

[0060] In some embodiments, the outer surface of the main body 111 includes insulating components, such as insulating films, to better protect the main body.

[0061] Referring to Figures 6 to 8, in some embodiments, the main body 111 is provided with a housing space, and the main body 111 includes a first housing 1111 and a second housing 1112, the first housing 1111 is provided with a first recess 1111a, and the second housing 1112 is provided with a second recess 1112a. The first housing 1111 is connected to the second housing 1112, forming the housing 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 housing 1111 extends outward to form a first extension edge 1113, and the periphery of the second housing 1112 extends outward to form a second extension edge 1114. After the first housing 1111 is connected to the second housing 1112, the first extension edge 1113 and the second extension edge 1114 overlap and seal each other.

[0062] In some embodiments, the first extension edge 1113 and the second extension edge 1114 overlap and seal each other to form two first seal portions 112 and two second seal portions 113. The two first seal portions 112 are arranged along the second direction Y, and the two second seal portions 113 are arranged along the third direction Z, with one first seal portion 112 connecting the two second seal portions 113 and the other first seal portion 112 connecting the two second seal portions 113. One first seal portion 112 is connected to the first wall 111a, and the other first seal portion 112 is connected to the second wall 111b. The main body 111 includes a fifth wall 111e and a sixth wall 111f arranged opposite each other along the third direction Z, with one of the two second seal portions 113 positioned on the fifth wall 111e and the other on the sixth wall 111f. The first direction X, the second direction Y, and the third direction Z are orthogonal to each other. In some embodiments, the battery cell 11 has two electrode terminals 11c, one of which extends out of the cell housing 11a from one first seal portion 112 and the other which extends out of the cell housing 11a from the other first seal portion 112.

[0063] Referring to Figures 9-11, in some embodiments, the battery cell 11 comprises two electrode terminals 11c and one first seal portion 112, with both electrode terminals 11c extending from the first seal portion 112 outside the cell housing 11a.

[0064] In some embodiments, the battery cell 11 comprises two electrode terminals 11c and two first sealing portions 112, the two electrode terminals 11c protruding out of the cell housing 11a from the same first sealing portion 112.

[0065] Referring to Figures 6 and 7, in some embodiments, the main body 111 includes two first walls 111a, two second walls 111b, and two first seal portions 112. One first wall 111a connects a third wall 111c to a first seal portion 112, and the other first wall 111a connects a fourth wall 111d to a first seal portion 112. One second wall 111b connects a third wall 111c to the other first seal portion 112, and the other second wall 111b connects a fourth wall 111d to the other first seal portion 112. One electrode terminal 11c extends from one first seal portion 112 to the outside of the cell housing 11a, and the other electrode terminal 11c extends from the other first seal portion 112 to the outside of the cell housing 11a.

[0066] When viewed from the second direction Y, the two first walls 111a are located on opposite sides of the first seal portion 112 in the first direction X. When viewed from the opposite direction of the second direction Y, i.e., from the first direction X, the two second walls 111b are located on opposite sides of the other first seal portion 112 in the first direction X.

[0067] In some embodiments, the main body 111 includes one first wall 111a, one second wall 111b, and two first seal portions 112, wherein the first wall 111a connects a third wall 111c to a first seal portion 112, and the second wall 111b connects the third wall 111c to another first seal portion 112. The main body 111 is provided with a housing space, which includes a first housing 1111 and a second housing 1112, wherein the first housing 1111 is provided with a first recess 1111a, and the second housing 1112 is flat. The first housing 1111 is connected to the second housing 1112, forming the housing space. The electrode assembly 11b is located within the first recess 1111a. One electrode terminal 11c extends outside the cell housing 11a from one first seal portion 112, and the other electrode terminal 11c extends outside the cell housing 11a from the other first seal portion 112.

[0068] In some embodiments, the main body 111 includes two first walls 111a, a second wall 111b, and a first sealing portion 112. The main body 111 is provided with a housing space and includes a first housing 1111 and a second housing 1112, the first housing 1111 being connected to the second housing 1112, the first housing 1111 being provided with a first recess 1111a, and the second housing 1112 being provided with a second recess 1112a, forming the housing space. The electrode assembly 11b is located within the first recess 1111a and the second recess 1112a. Two electrode terminals 11c extend out of the cell housing 11a from the same first sealing portion 112.

[0069] Furthermore, one second wall 111b and one first seal portion 112 are provided. One first wall 111a connects the third wall 111c and the first seal portion 112, and the other first wall 111a connects the fourth wall 111d and the first seal portion 112. When observed from the second direction Y, the two first walls 111a are located on opposite sides of the first seal portion 112 in the first direction X.

[0070] Furthermore, there are two second walls 111b and two first seal portions 112. One first wall 111a connects the third wall 111c to the first seal portion 112, and the other first wall 111a connects the fourth wall 111d to the first seal portion 112. When viewed from the second direction Y, the two first walls 111a are located on opposite sides of the first seal portion 112 in the first direction X. One second wall 111b connects the third wall 111c to the other first seal portion 112, and the other second wall 111b connects the fourth wall 111d to the other first seal portion 112. When viewed from the opposite direction of the second direction Y, the two second walls 111b are located on opposite sides of the first seal portion 112 in the first direction X.

[0071] In some embodiments, the main body 111 includes a first wall 111a, a second wall 111b, and a first sealing portion 112. The main body 111 is provided with a housing space and includes a first housing 1111 and a second housing 1112, the first housing 1111 being provided with a first recess 1111a and the second housing 1112 being flat. The first housing 1111 is connected to the second housing 1112, forming the housing space. The electrode assembly 11b is located within the first recess 1111a. Two electrode terminals 11c protrude out of the cell housing 11a from the same first sealing portion 112.

[0072] Furthermore, one first sealing portion 112 is provided, with the first wall 111a connecting the third wall 111c and the first sealing portion 112, and the second wall 111b connecting the third wall 111c.

[0073] Alternatively, two first sealing portions 112 are provided. The first wall 111a connects the third wall 111c to the first sealing portion 112, and the second wall 111b connects the third wall 111c to the other first sealing portion 112.

[0074] Referring to Figures 6, 7, 13, and 14, in some embodiments, the first seal portion 112 includes a first connector 112a, a second connector 112b, and a third connector 112c. The second connector 112b and the third connector 112c are arranged opposite each other along the third direction Z. The second connector 112b is connected to the third connector 112c via the first connector 112a. The electrode terminal 11c protrudes from the first connector 112a. The bracket 12 covers at least a portion of the first connector 112a, the second connector 112b, and the third connector 112c, thereby protecting the first seal portion 112.

[0075] Referring to Figures 8 and 12, in some embodiments, the electrode assembly 11b is a wound structure and includes a first flat section 1116, a second flat section 1117, a first curved section 1118, and a second curved section 1119. The first flat section 1116 connects the first curved section 1118 and the second curved section 1119, and the second flat 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 and covers the projection of the first flat section 1116, the projection of the fourth wall 111d covers the projection of the first flat section, the projection of the third wall 111c covers the projection of the second flat section 1117, and the projection of the fourth wall 111d covers the projection of the second flat section 1117. This makes it easier to apply uniform pressure between the battery cells 11, further improving the lifespan of the battery cells 11.

[0076] Referring to Figures 16-19, in some embodiments, when observed from a second direction Y, the first portion 121 is located between the third wall 111c and the fourth wall 111d in a first direction X. A first gap 12a exists between the first portions 121 of adjacent battery cells 11. This first gap 12a separates and installs adjacent brackets 12. When the main bodies 111 of adjacent battery cells 11 apply pressure to each other, the force applied to the first seal portion 112 is reduced, improving the protective performance of the first seal portion 112.

[0077] Referring to Figures 12-19, in some embodiments, the bracket 12 includes a second portion 122, a first side portion 123, and a second side portion 124, wherein the second portion 122 covers at least a portion of the first connector 112a, the first side portion 123 covers the second connector 112b, and the second side portion 124 covers the third connector 112c. Alternatively, the structural strength of the bracket 12 is enhanced by the first portion 121 connecting the first side portion 123 and the second side portion 124, and the second portion 122 connecting the first side portion 123 and the second side portion 124. The electrode terminal 11c protrudes from the second portion 122.

[0078] In some embodiments, along the second direction Y, the projection of the first side portion 123 and the projection of the first curved portion 1118 overlap, the projection of the first side portion 123 and the projection of the first flat portion 1116 are separated, and separating the projection of the first side portion 123 and the projection of the second flat portion 1117 is advantageous for pressure relief of the battery cell 11.

[0079] In some embodiments, along the second direction Y, the projection of the second side portion 124 and the projection of the second curved portion 1119 overlap, the projection of the second side portion 124 and the projection of the first flat portion 1116 are separated, and the projection of the second side portion 124 and the projection of the second flat portion 1117 are separated, which is advantageous for pressure release of the battery cell 11.

[0080] Referring to Figure 15, in some embodiments, when viewed from a first direction X, a portion of the first connection portion 112a is positioned between the main body 111 and the first portion 121 in a second direction Y, and between the first side portion 123 and the second side portion 124 in a third direction Z. The bracket 12 covers a portion of the first seal portion 112, thereby enhancing protection to the first seal portion 112. Positioning a 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 an expanded space for the first connection portion 112a, facilitates pressure release, reduces the influence of pressure within the battery cell 11 on the first connection portion 112a, minimizes the impact on the sealing performance of the first seal portion 112, and promotes heat dissipation from the first seal portion 112.

[0081] In some embodiments, the battery cell 11 contains an electrolyte within the cell housing 11a. The electrode assembly 11b includes a first electrode sheet, a separator, and a second electrode sheet, which are wound or stacked to form the electrode assembly. A portion of the electrolyte permeates the first electrode sheet, the separator, and the second electrode sheet to conduct ions, while another portion of the electrolyte remains free and adheres to the surface of the cell housing 11a and / or the electrode assembly 11b. This free electrolyte is called the free electrolyte. When multiple battery cells 11 are circulated, the free electrolyte within the battery cells 11 may be compressed.

[0082] In the present invention, a portion of the first connecting portion 112a is positioned between the main body portion 111 and the first portion 121 in the second direction Y, and a portion of the first connecting portion 112a is positioned between the first side portion 123 and the second side portion 124 in the third direction Z. As a result, an expansion space is secured in the first sealing portion 112, and the influence of the expansion of the battery cell 11 on the sealing performance of the first sealing portion 112 is reduced.

[0083] Referring to Figures 13 to 19, in some embodiments, when viewed from the second direction Y, the second portion 122 is positioned between the third wall 111c and the fourth wall 111d in the first direction X. This reduces the stress on the first seal portion 112 when the main bodies 111 of adjacent battery cells 11 apply pressure to each other, thereby improving the protective performance of the first seal portion 112.

[0084] In some embodiments, when viewed from a second direction Y, the first side portion 123 is positioned between the third wall 111c and the fourth wall 111d in the first direction X. This reduces the stress on the first seal portion 112 when the body portions 111 of adjacent battery cells 11 are pressurized against each other, thereby enhancing protection for the first seal portion 112.

[0085] In some embodiments, when viewed from a second direction Y, the second side portion 124 is positioned between the third wall 111c and the fourth wall 111d in the first direction X. This reduces the force applied to the first seal portion 112 when the body portions 111 of adjacent battery cells 11 exert pressure on each other, thereby increasing protection for the first seal portion 112.

[0086] In some embodiments, the bracket 12 includes a first extension 125 extending from a first side portion 123. The first extension 125 protects the fifth wall 111e and the second seal portion 113 and reinforces the connection between the bracket 12 and the battery cell 11.

[0087] Furthermore, in the second direction Y, the first extension 125 is provided on a part of the fifth wall 111e and a part of the second sealing portion 113, thereby protecting a part of the main body 111 and a part of the second sealing portion 113, strengthening the connection between the bracket 12 and the battery cell 11, and facilitating the integral molding of the bracket 12 and the battery cell 11.

[0088] Alternatively, in the second direction Y, the first extension 125 is provided over the entire fifth wall 111e and the entire second sealing portion 113, thereby enhancing the protection of the main body 111 and the second sealing portion 113, and strengthening the connection between the bracket 12 and the battery cell 11.

[0089] In some embodiments, when viewed from a second direction Y, the first side portion 123 does not extend beyond the first extension portion 125 in the first direction X, and a second gap 123a is formed between adjacent first side portions 123. When adjacent cell housings 11a are in contact and connected and exert pressure on each other, the second gap 123a between adjacent first side portions 123 reduces the force acting on the first side portions 123 and the first seal portion 112, thereby protecting the first seal portion 112. The second gap 123a also facilitates heat dissipation from the battery cell 11.

[0090] In some embodiments, the bracket 12 includes a second extension 126 extending from a second side portion 124. The second extension 126 protects the sixth wall 111f and the second seal portion 113, strengthens the connection between the bracket 12 and the battery cell 11, and facilitates injection molding of the second extension 126.

[0091] Alternatively, in the second direction Y, the second extension 126 is provided on a part of the sixth wall 111f and a part of the second sealing portion 113, thereby protecting a part of the main body 111 and a part of the second sealing portion 113, strengthening the connection between the bracket 12 and the battery cell 11, and facilitating the integral molding of the bracket 12 and the battery cell 11.

[0092] Furthermore, in the second direction Y, the second extension 126 is provided on the entirety of the sixth wall 111f and the entirety of the second sealing portion 113, thereby providing better protection to the main body 111 and the second sealing portion 113, strengthening the connection between the bracket 12 and the battery cell 11, and facilitating the integral molding of the bracket 12 and the battery cell 11.

[0093] In some embodiments, when viewed from a second direction Y, the second side portion 124 does not extend beyond the second extension portion 126 in the first direction X, and a third gap 124a is formed between adjacent second side portions 124. When adjacent cell housings 11a are in contact and connected and pressure is applied to each other, the third gap 124a between two adjacent second side portions 124 reduces the force acting on the second side portions 124, thereby further reducing the force acting on the first seal portion 112 and further protecting the first seal portion 112. The third gap 124a also facilitates heat dissipation from the battery cell 11.

[0094] In some embodiments, along a first direction X, the bracket 12 includes a third recess 1251 and a first protrusion 1252, the third recess 1251 being provided on a first extension 125, and the first protrusion 1252 extending from the first extension 125. When the bodies of adjacent battery cells 11 are in contact with each other for connection, the first protrusion 1252 is located within the third recess 1251 of the adjacent bracket 12, and a fourth gap 12b is provided between the first protrusion 1252 and the third recess 1251. The third recess 1251 and the first protrusion 1252 further position the adjacent brackets 12, reducing the offset between adjacent body portions 111 and further facilitating the mutual pressure between multiple body portions 111. The fourth gap 12b reduces stress on the bracket 12, enhances protection for the first seal portion 112, and increases the connection strength between the bracket 12 and the battery cell 11.

[0095] In some embodiments, along a first direction X, the bracket 12 includes a fourth recess 1261 and a second protrusion 1262, the fourth recess 1261 being provided on a second extension 126, and the second protrusion 1262 extending from the second extension 126. When the main bodies of adjacent battery cells 11 are in contact with each other, the second protrusion 1262 is positioned within the fourth recess 1261 of the adjacent bracket 12, and a fifth gap 12c is provided between the second protrusion 1262 and the fourth recess 1261. The fourth recess 1261 and the second protrusion 1262 further position the adjacent brackets 12, further reducing the offset between adjacent body portions 111 and further facilitating the mutual pressure between multiple body portions 111. The fifth gap 12c further reduces the stress on the bracket 12, further enhances the protective performance of the first seal portion 112, and further increases the connection strength between the bracket 12 and the battery cell 11.

[0096] In some embodiments, the bracket 12 includes a third portion 127, which is connected to the side of the first portion 121 toward the second portion 122. The third portion 127 extends from the first portion 121 in the direction opposite to the second direction Y, and the third portion 127 covers a portion of the first seal portion 112. The third portion 127 provides support and protection for the portion of the first seal portion 112 that protrudes from the first portion 121, reducing the impact of damage to the first seal portion 112 on the sealing performance of the battery cell 11.

[0097] In some embodiments, the battery cell unit 10 includes two brackets 12, one bracket 12 connected to a portion of a first wall 111a and the other bracket 12 connected to a portion of a second wall 111b. One electrode terminal 11c protrudes from the first seal portion 112 and bracket 12 along a second direction Y, and the other electrode terminal 11c protrudes from the first seal portion 112 and bracket 12 along the direction opposite to the second direction Y.

[0098] Referring to Figures 1 and 2, in some embodiments, multiple battery cell units 10 arranged along a first direction X are under pressurization. Each main body 111 is under pressurization.

[0099] In some embodiments, the battery module 100 comprises a housing 40, which includes a first side wall 41, a second side wall 42, a top wall 43, and a bottom wall 44. The first side wall 41 and the second side wall 42 are arranged along a second direction Y, and the top wall 43 and the bottom wall 44 are arranged along a third direction Z. The first side wall 41 connects to the top wall 43 and the bottom wall 44, and the second side wall 42 connects to the top wall 43 and the bottom wall 44. The first member 20, the housing 40, and the second member 30 form a housing space, and the battery cell units 10 are installed within this housing space. Along a first direction X, a plurality of battery cell units 10 are installed between the first member 20 and the second member 30, and the first member 20 and the second member 30 restrict the movement of the plurality of battery cell units 10, with the first member 20 connecting to one of the two outermost battery cells 11, and the second member 30 connecting to the other outermost battery cell 11.

[0100] Alternatively, the first member 20 connects the first side wall 41 and the second side wall 42, and the second member 30 connects the first side wall 41, the second side wall 42, and the bottom wall 44.

[0101] Furthermore, the first member 20 connects the first side wall 41, the second side wall 42, the top wall 43, and the bottom wall 44, and the second member 30 connects the first side wall 41, the second side wall 42, the top wall 43, and the bottom wall 44.

[0102] Referring to Figure 1, in some embodiments, the battery module 100 comprises a housing 40 and a front wall 45, the housing 40 comprising a first side wall 41, a second side wall 42, a top wall 43, and a bottom wall 44. The first side wall 41 and the second side wall 42 are arranged along a second direction Y, and the top wall 43 and the bottom wall 44 are arranged along a third direction Z. The first side wall 41 connects to the top wall 43 and the bottom wall 44, and the second side wall 42 connects to the top wall 43 and the bottom wall 44. The front wall 45 connects to the first side wall 41, the second side wall 42, the top wall 43, and the bottom wall 44. The first member 20 and the front wall 45 are provided along a first direction X, the first member 20, the front wall 45, and the housing 40 form a housing space, and the second member 30 is located within the housing space. Along the first direction X, the second member 30 is located between a plurality of battery cell units 10 and the front wall 45. In some embodiments, a first elastic member 101 is provided between the first member 20 and the outermost battery cell 11. The first elastic member 101 is compressible by the battery cell unit 10 and can impart expansion space and pressure to the battery cell unit 10. The first elastic member 101 includes a blister.

[0103] In some embodiments, a second elastic member 102 is provided between the second member 30 and the other battery cell 11 located on the outermost side. The second elastic member 102 is compressible by the battery cell unit 10 and can further impart expansion space and pressure to the battery cell unit 10. Alternatively, the second elastic member 102 includes a blister.

[0104] In some embodiments, the first member 20 and the second member 30 can have the same structure.

[0105] Referring to Figures 1 and 20, in some embodiments, the bottom wall 44 is provided with a first stopper portion 441 extending in a first direction X and a second stopper portion 442 extending in a first direction X. The first stopper portion 441 and the second stopper portion 442 are arranged side by side in a second direction Y. The first stopper portion 441 and the second stopper portion 442 protrude from the bottom wall 44 in a direction opposite to a third direction Z. When the bracket 12 is installed in the housing 40, the bracket 12 is positioned between the first stopper portion 441 and the second stopper portion 442. When the battery cell 11 expands, the first stopper portion 441 and the second stopper portion 442 can restrict the movement of the bracket 12 in the second direction Y and are advantageous for the movement of the bracket 12 in the first direction X.

[0106] In some embodiments, the top wall 43 is provided with a third stopper portion 431 extending in a first direction X and a fourth stopper portion 432 extending in a first direction X. The third stopper portion 431 and the fourth stopper portion 432 are provided side by side in a second direction Y. The first stopper portion 441 and the third stopper portion 431 are provided along a third direction Z, and the second stopper portion 442 and the fourth stopper portion 432 are provided along a third direction Z. The third stopper portion 431 and the fourth stopper portion 432 are convex in the third direction Z on the surface of the top wall 43 relative to the bottom wall 44. When the bracket 12 is provided inside the housing 40, the bracket 12 is located between the third stopper portion 431 and the fourth stopper portion 432. When the battery cell 11 expands, the third stopper portion 431 and the fourth stopper portion 432 can restrict the movement of the bracket 12 in the second direction Y, which is advantageous for the movement of the bracket 12 in the first direction X.

[0107] Referring to Figures 2, 20, and 21, in some embodiments, the second member 30 has a base 31 and a bent portion 32, the base 31 connecting to the bent portion 32, the bent portion 32 fixing and connecting to the housing 40. The base 31 is positioned to be able to apply pressure to the battery cell unit 10, and the bent portion 32 is positioned to provide an expansion space for the battery cell unit 10.

[0108] In some embodiments, the second member 30 does not apply pressure to the battery cell unit 10 when the battery cell 11 is not expanded, and when the battery cell 11 is expanded, the battery cell 11 compresses the second member 30 and applies pressure to the battery cell 11.

[0109] In some embodiments, the second member 30 applies pressure to the battery cell 11 when the battery cell 11 is not expanded, and compresses the second member 30 to apply more pressure to the battery cell 11 when the battery cell 11 is expanded.

[0110] In some embodiments, the base 31 is connected to the main body 111 of the outermost battery cell 11. The base 31 is provided with a plurality of projections 311 spaced apart along the second direction Y, and the projections 311 are formed in a concave shape from the side of the base 31 facing the main body 111 toward the direction away from the main body 111, thereby increasing the structural strength of the base 31 and reducing the risk of deformation due to uneven stress on the base 31.

[0111] In some embodiments, the bent portion 32 includes a first bent portion 321 and a second bent portion 322 arranged in a third direction Z, the first bent portion 321 connecting one side of the base 31 and the second bent portion 322 connecting the other side of the base 31. The first bent portion 321 and the second bent portion 322 are actuated to the battery cell unit 10 via the base 31, and the first bent portion 321 and the second bent portion 322 are arranged to provide expansion space to the battery cell unit 10. In another embodiment, the first bent portion 321 and the second bent portion 322 are arranged in a second direction Y.

[0112] In some embodiments, the second member 30 includes a first connecting portion 323 connected to the opposite side of the base portion 31 of the first bent portion 321, and the first connecting portion 323 is fixed to the housing 40, and the first bent portion 321 is fixed to the housing 40 via the first connecting portion 323, thereby enabling the biasing force received by the bent portion 32 to be transmitted to the housing 40.

[0113] In some embodiments, the first connecting portion 323 is parallel to the base portion 31 and contributes to the deformation of the second member 30 in the first direction X.

[0114] In some embodiments, the second member 30 includes a second connecting portion 324 connected to the opposite side of the base portion 31 of the second bent portion 322, and the second connecting portion 324 is fixed to the housing 40, and the second bent portion 322 is fixed to the housing 40 via the second connecting portion 324, thereby transmitting the biasing force received by the bent portion 32 to the housing 40. Examples of fixing methods include welding, adhesive fixing, contact fixing, fastening fixing, and screw fixing.

[0115] In some embodiments, the second connecting portion 324 is parallel to the base portion 31 and contributes to the deformation of the second member 30 in the first direction X.

[0116] In some embodiments, a first fixing portion 411 is provided on the first side wall 41, and along the first direction X, the projection of the first connecting portion 323 and the projection of the first fixing portion 411 overlap, and the first connecting portion 323 is fixed to the first fixing portion 411.

[0117] In some embodiments, a second fixing portion 421 is provided on the second side wall 42, and the projection of the first connecting portion 323 and the projection of the second fixing portion 421 overlap along the first direction X, and the first connecting portion 323 is fixed to the second fixing portion 421. For example, this could be fixed by welding, adhesive, contact, fastening, or screwing.

[0118] In some embodiments, the first fixing portion 411 is positioned closer to the battery cell unit 10 than the first connecting portion 323, thereby facilitating the fixing of the first fixing portion 411 and the first connecting portion 323.

[0119] In some embodiments, the second fixing portion 421 is positioned closer to the battery cell unit 10 than the first connecting portion 323, thereby facilitating the fixing of the second fixing portion 421 to the first connecting portion 323.

[0120] In some embodiments, the structural strength of the first side wall 41 is greater than that of the second member 30, thereby reducing the risk of deformation of the first side wall 41 due to the forces acting on the first bent portion 321.

[0121] In some embodiments, the structural strength of the second side wall 42 is greater than that of the second member 30, thereby reducing the risk of deformation of the second side wall 42 due to the forces acting on the first bent portion 321.

[0122] In some embodiments, the thickness of the first side wall 41 is set to be greater than the thickness of the base 31, the first bent portion 321, and the first connecting portion 323. This improves the structural strength of the first side wall 41 and reduces the risk of deformation of the first side wall 41 due to the forces acting on the first bent portion 321.

[0123] In some embodiments, the thickness of the second side wall 42 is set to be greater than the thickness of the base 31, the first bent portion 321, and the first connecting portion 323, thereby improving the structural strength of the second side wall 42 and reducing the risk of deformation of the second side wall 42 due to the forces acting on the first bent portion 321.

[0124] In some embodiments, a third fixing portion 443 is provided on the bottom wall 44, and the projection of the second connecting portion 324 and the projection of the third fixing portion 443 overlap along the first direction X, and the second connecting portion 324 is fixed to the third fixing portion 443. Alternatively, the third fixing portion 443 is provided on the bottom wall 44, and the projection of the second connecting portion 324 and the projection of the third fixing portion 443 overlap along the first direction X, and the second connecting portion 324 is fixed to the third fixing portion 443. Examples include welding, adhesive fixing, contact fixing, fastening, and screw fixing.

[0125] In some embodiments, the third fixing portion 443 is positioned closer to the battery cell unit 10 than the second connecting portion 324, thereby facilitating the fixing of the third fixing portion 443 and the second connecting portion 324.

[0126] In some embodiments, the structural strength of the bottom wall 44 is greater than that of the second member 30, thereby reducing the risk of deformation of the bottom wall 44 due to the forces acting on the first bent portion 321.

[0127] In some embodiments, the thickness of the bottom wall 44 is set to be greater than the thickness of the base 31, the second bent portion 322, and the second connecting portion 324, thereby improving the structural strength of the bottom wall 44 and reducing the risk of deformation of the bottom wall 44 due to the forces acting on the second bent portion 322.

[0128] In some embodiments, the first bent portion 321 includes a first bent segment 321a and a second bent segment 321b, where the first bent segment 321a is connected to the base 31 and the second bent segment 321b is connected to the first bent segment 321a and a first connecting portion 323. The first bent segment 321a and the base 31 form a first angle A1, the second bent segment 321b and the first connecting portion 323 form a second angle B1, and the first bent segment 321a and the second bent segment 321b form a third angle C1, and A1 ≥ B1 is advantageous in increasing the deformation resistance of the first bent segment 321a and reducing the risk of the second member 30 deforming in the first direction X.

[0129] In some embodiments, having C1 > A1 is advantageous in promoting uniform deformation of the first bent portion 321.

[0130] In some embodiments, having C1=2B1=2A1 is advantageous in further promoting uniform deformation of the first bent portion 321.

[0131] In some embodiments, the second bent portion 322 includes a third bent segment 322a and a fourth bent segment 322b, where the third bent segment 322a is connected to the base 31 and the fourth bent segment 322b is connected to the third bent segment 322a and a second connecting portion 324. The third bent segment 322a and the base 31 form a first angle A2, the fourth bent segment 322b and the second connecting portion 324 form a second angle B2, and the third bent segment 322a and the fourth bent segment 322b form a third angle C2, and by A2 ≥ B2, the deformation resistance capability of the third bent segment 322a can be increased and the risk of the second member 30 deforming in the first direction X can be reduced.

[0132] In some embodiments, C2 > A2, which can promote uniform deformation of the second bent portion 322.

[0133] In some embodiments, having C2=2B2=2A2 is advantageous in further promoting uniform deformation of the first bent portion 321.

[0134] In some embodiments, the first bent portion 321 and the second bent portion 322 have the same structure, which allows for uniform stress distribution and promotes uniform deformation. Alternatively, the second bent portion 322 is set to the same angle as the first bent portion 321. When force is applied to the first bent portion 321 and the second bent portion 322, they receive the force uniformly, deform uniformly, and the risk of rotation of the second member 30 due to non-uniform deformation can be reduced. Alternatively, A1=A2, B1=B2, and C1=C2 are set.

[0135] Referring to Figure 1, in some embodiments, the battery module 100 includes a sampling line 50, which is connected to either of the electrode terminals 11c of two adjacent battery cells 11 that are bent and connected. The sampling line 50 can collect either the voltage, current, or temperature of each battery cell 11.

[0136] Referring to Figure 1, in some embodiments, the battery module 100 includes a circuit board 60, which is installed between the second member 30 and the front wall 45. The circuit board 60 is connected to a sampling line 50 that receives collected data. The circuit board 60 includes a BMS component (Battery Management System), which includes several electronic components that enable functions such as control, protection, communication, energy calculation, signal transmission, and power transmission of the battery cell 11. Optionally, the circuit board 60 includes a flexible printed circuit board (FPC). Optionally, the circuit board 60 includes a printed circuit board (PCB), on which several conductors (not shown) are installed.

[0137] Referring to Figure 22, the present invention further provides an electrical equipment 200 employing the battery module 100 described above. In one embodiment, the electrical equipment 200 of the present invention is, but is not limited to, an electronic device, a drone, a backup power supply, an electric vehicle, an electric motorcycle, an electric assist bicycle, a power tool, or a large household battery storage module.

[0138] Those skilled in the art should recognize that the above embodiments are for illustrative purposes only and not limit the present invention. Any appropriate modifications and variations made to the above embodiments within the substantial scope of the present invention are all included within the scope of the disclosure.

Claims

1. A battery module comprising a plurality of battery cell units, a first member, and a second member arranged along a first direction, wherein each battery cell unit comprises a battery cell and a bracket, The battery cell includes a cell housing, an electrode assembly, and electrode terminals, the electrode terminals being connected to the electrode assembly and extending out from the cell housing. The cell housing comprises a main body and a first sealing portion, the electrode assembly is disposed within the main body, the electrode terminals extend from the first sealing portion to the outside of the cell housing, and the main bodies of adjacent battery cells are in contact with each other and connected. The cell housing includes a first wall, a second wall, a third wall, and a fourth wall. The first wall and the second wall are provided facing each other along a second direction perpendicular to the first direction, The third wall and the fourth wall are provided facing each other along the first direction, The bracket includes a first portion, the first portion covering at least a portion of the first wall, When observed from the second 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. The first member and the second member are arranged on both sides of the plurality of battery cell units along the first direction, The first member is configured to restrict the battery cells from separating from each other. The battery module is characterized in that the second member is configured to restrict the battery cells from separating from each other.

2. The battery module according to claim 1, characterized in that, when observed from the second direction, the first portion is located between the third wall and the fourth wall in the first direction.

3. The battery module according to claim 1 or 2, characterized in that each of the main body portions of the battery cell is in a pressurized state.

4. The battery cell unit includes two of the brackets, The cell housing includes two of the first sealing portions, The electrode terminals extend out of the cell housing from each of the two first sealing portions. The battery module according to any one of claims 1 to 3, characterized in that each of the first sealing portions covers the bracket.

5. The battery module according to any one of claims 1 to 4, characterized in that the second member is arranged to apply pressure to the plurality of battery cell units and provide an expansion space for the battery cell units.

6. The battery module comprises a housing, and the battery cell unit is installed inside the housing. The second member has a base portion and a bent portion, The base portion is connected to the bent portion, The bent portion is fixed to the housing, The base is positioned so as to be able to apply pressure to the battery cell unit. The battery module according to claim 5, characterized in that the bent portion is arranged to provide an expansion space for the battery cell unit.

7. The bent portion includes a first bent portion and a second bent portion arranged in a third direction, the first bent portion connecting one side of the base, and the second bent portion connecting the other side of the base. The battery module according to claim 6, characterized in that the first direction, the second direction, and the third direction are orthogonal to each other.

8. The second member includes the first connecting portion, The battery module according to claim 7, characterized in that the first connecting portion is connected to the side of the first bending portion away from the base and fixed to the housing.

9. The first bent portion includes a first bent segment and a second bent segment, The battery module according to claim 8, characterized in that the first bent segment is connected to the base and the second bent segment, and the second bent segment is connected to the first connecting portion.

10. The first bent segment and the base are at a first angle A １ The second bent segment and the first connecting portion form a second angle B １ Forms A １ ≥ B １ The battery module according to claim 8 or 9, characterized in that it is the battery module according to claim 8 or 9.

11. The first and second bent segments are at a third angle C １ Forms C １ > A １ The battery module according to claim 10, characterized in that it is the battery module according to claim 10.

12. C １ = 2A １ = 2B １ The battery module according to claim 11, characterized in that it is as described above.

13. The housing comprises a first side wall, a second side wall, a top wall, and a bottom wall. The first side wall is connected to the top wall and the bottom wall, and the second side wall is connected to the top wall and the bottom wall, The first member, the housing, and the second member form a housing space. The battery module according to any one of claims 6 to 12, characterized in that the battery cell unit is installed within the housing space.

14. The aforementioned battery module has a front wall, The housing comprises a first side wall, a second side wall, a top wall, and a bottom wall. The front wall is connected to the first side wall, the second side wall, the top wall, and the bottom wall. The first member and the front wall are provided along the first direction, and the first member, the front wall and the housing form a housing space. The battery module according to any one of claims 6 to 12, wherein the second member is located between the plurality of battery cell units and the front wall along the first direction, and the second member is located within the housing space.

15. The first sealing portion includes a first connecting portion, a second connecting portion, and a third connecting portion. The second and third connecting portions are provided facing each other along the third direction, The second connection part is connected to the third connection part via the first connection part. The battery module according to any one of claims 1 to 14, characterized in that the bracket covers at least a portion of the second connection portion, the third connection portion, and the first connection portion.

16. The bracket includes a second portion, a first side portion, and a second side portion. The second portion covers at least a part of the first connecting portion, The battery module according to claim 15, characterized in that the first side portion covers the second connection portion, and the second side portion covers the third connection portion.

17. The battery module according to claim 16, characterized in that, when observed from the second direction, the second portion is located between the third wall and the fourth wall in the first direction.

18. The battery module according to claim 16 or 17, characterized in that, when observed from the second direction, the first side portion is located between the third wall and the fourth wall in the first direction.

19. The battery module according to any one of claims 16 to 18, characterized in that, when observed from the second direction, the second side portion is located between the third wall and the fourth wall in the first direction X.

20. The battery module according to any one of claims 16 to 19, characterized in that, when observed from the first direction, a part of the first connection portion is located between the main body portion and the first portion in the second direction, and between the first side portion and the second side portion in the third direction.

21. The electrode assembly has a wound structure and includes a first flat section, a second flat section, a first curved section, and a second curved section. The first flat section connects the first curved section and the second curved section. The second flat section connects the first curved section and the second curved section. The battery module according to any one of claims 16 to 20, characterized in that the projection of the third wall covers the projection of the first flat portion along the first direction, and the projection of the fourth wall covers the projection of the first flat portion.

22. The battery module according to claim 21, characterized in that, along the second direction, the projection of the first side portion and the projection of the first curved portion overlap, the projection of the first side portion and the projection of the first flat portion are separate, and the projection of the first side portion and the projection of the second flat portion are separate.

23. The battery module according to claim 21, characterized in that, along the second direction, the projection of the second side portion and the projection of the second curved portion overlap, the projection of the second side portion and the projection of the first flat portion are separate, and the projection of the second side portion and the projection of the second flat portion are separate.

24. A battery module according to any one of claims 16 to 23, characterized in that a second gap is formed between adjacent first side portions.

25. A battery module according to any one of claims 16 to 24, characterized in that a third gap is formed between adjacent second side portions.

26. The bracket includes a first extension extending from the first side in the second direction, The main body includes a fifth wall, The battery module according to any one of claims 16 to 25, characterized in that the first extension covers at least a portion of the fifth wall.

27. The battery module according to claim 26, wherein the bracket comprises a third recess and a first protrusion, the first protrusion is provided in the third recess of an adjacent bracket, and a fourth gap is provided between the first protrusion and the third recess along the first direction.

28. The battery module according to any one of claims 1 to 27, characterized in that the bracket is integrally molded with the battery cell.

29. The battery module according to any one of claims 1 to 28, characterized in that the bracket is an insulating bracket.

30. The housing comprises a first stopper portion and a second stopper portion, The battery module according to any one of claims 6 to 14, characterized in that the bracket is located between the first stopper portion and the second stopper portion along the second direction.

31. An electrical equipment characterized by comprising a battery module as described in any one of claims 1 to 30.

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