Battery module, battery pack and electric equipment

Abstract

The invention discloses a battery module, a battery pack and electric equipment. The battery module comprises a shell, a battery cell assembly and an elastic part, the battery core assembly is arranged in the shell; the elastic piece is arranged in the shell, and the elastic piece and the battery core assembly are arranged along a first direction; the elastic piece comprises a base part, a buffering part and a connecting part. The base part is connected with the battery core assembly; the buffer portion connects the connecting portion and the base portion. The shell comprises a first fixing part and a second fixing part. In the second direction, the connecting part comprises a first extending part and a second extending part which exceed the base part, the first extending part is connected with the first fixing part, and the second extending part is connected with the second fixing part. The first extension part and the second extension part are located on the two sides of the base part respectively in the second direction when observed in the first direction, and the first direction is perpendicular to the second direction. The first extension parts located on the two sides of the base part are connected with the first fixing parts, and the second extension parts are connected with the second fixing parts, so that an expansion space is further provided for the battery cell assembly, and protection on the battery cell assembly is improved.

Description

Battery modules, battery packs and electrical equipment Technical Field

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

[0002] Currently, battery modules are widely used in drones, electric vehicles, smart energy storage devices, and other fields. Battery modules tend to expand during use, requiring expansion space for the battery cell components.

[0003] Summary of the Invention

[0004] In view of this, it is necessary to provide a battery module, a battery pack and an electrical device that can further provide expansion space and increase protection for battery cell components.

[0005] An embodiment of the present application provides a battery module, comprising a shell, a battery cell assembly and an elastic member. The battery cell assembly is arranged in the shell. The elastic member is arranged in the shell, and the elastic member and the battery cell assembly are arranged along a first direction. The elastic member comprises a base, a buffer portion and a connecting portion. The base is connected to the battery cell assembly. The buffer portion is connected to the connecting portion and the base. The shell comprises a first fixing portion and a second fixing portion. In the second direction, the connecting portion comprises a first extension portion and a second extension portion extending beyond the base, the first extension portion being connected to the first fixing portion, and the second extension portion being connected to the second fixing portion. Observed along the first direction, in the second direction, the first extension portion and the second extension portion are respectively located on both sides of the base, and the first direction is perpendicular to the second direction. By connecting the first extension portion located on both sides of the base to the first fixing portion and the second extension portion to the second fixing portion, further expansion space can be provided for the battery cell assembly, reducing the impact on the battery cell assembly and increasing protection for the battery cell assembly.

[0006] In one or more optional embodiments above, in some embodiments of the present application, the connecting portion includes a first connecting portion. The first connecting portion connects the first extending portion and the second extending portion.

[0007] In one or more of the above optional embodiments, in some embodiments of the present application, the connecting portion includes a second connecting portion. The first connecting portion and the second connecting portion are arranged along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The second connecting portion is connected to the housing.

[0008] In one or more of the above optional embodiments, in some embodiments of the present application, the second connecting portion includes a third extension portion and a fourth extension portion. The second connecting portion connects the third extension portion and the fourth extension portion. The third extension portion is connected to the first fixing portion, and the fourth extension portion is connected to the second fixing portion. When viewed along the first direction, in the second direction, the third extension portion and the fourth extension portion are respectively located on both sides of the base portion, which can provide further expansion space for the battery cell assembly, reduce the impact on the battery cell assembly, and increase protection for the battery cell assembly.

[0009] In one or more of the above optional embodiments, in some embodiments of the present application, along the first direction, a portion of the projection of the third extension portion is separated from a projection of the first fixing portion, which facilitates deformation of the third extension portion. And / or, along the first direction, a portion of the projection of the fourth extension portion is separated from a projection of the second fixing portion, which facilitates deformation of the fourth extension portion.

[0010] In one or more of the above optional embodiments, in some embodiments of the present application, the third extending portion is fixed to the first fixing portion, and / or the fourth extending portion is fixed to the second fixing portion.

[0011] In one or more of the above optional embodiments, in some embodiments of the present application, along the first direction, the projection of the first extension portion is separated from the projection of the first fixing portion, which facilitates deformation of the first extension portion. And / or, along the first direction, the projection of the second extension portion is separated from the projection of the second fixing portion, which facilitates deformation of the second extension portion.

[0012] In one or more optional embodiments above, in some embodiments of the present application, the first extending portion and the first fixing portion are fixed, and / or the second extending portion and the second fixing portion are fixed along the first direction.

[0013] In one or more of the above optional embodiments, in some embodiments of the present application, the housing includes a first sidewall and a second sidewall disposed opposite each other along a second direction. Along the second direction, the distance between the connecting portion and the first sidewall is smaller than the distance between the battery cell assembly and the first sidewall; and / or, along the second direction, the distance between the connecting portion and the second sidewall is smaller than the distance between the battery cell assembly and the second sidewall. When a force is applied to the housing, the connecting portion can buffer the force, reducing the impact on the battery cell assembly, thereby facilitating enhanced protection for the battery cell assembly.

[0014] In one or more of the above optional embodiments, in some embodiments of the present application, the buffer portion includes a first buffer portion. The first buffer portion connects the first connecting portion and the base portion. The first buffer portion includes a first section and a second section. The first section connects to the base portion. The second section includes a first subsection and at least one second section. The first section connects the first section and the first connecting portion. The second section connects the first extension portion and / or the second extension portion. In the second direction, the second section is located on one side of the first section. The second section can increase the strength of the elastic member.

[0015] In one or more of the above optional embodiments, in some embodiments of the present application, in the second direction, the second segment extends beyond the base.

[0016] In one or more of the above optional embodiments, in some embodiments of the present application, the length of the second segment is smaller than the length of the first segment. By reducing the length of the second segment, the strength of the elastic member can be increased while facilitating the bending of the first extension portion and the second extension portion.

[0017] In one or more optional embodiments above, in some embodiments of the present application, along the third direction, the length of the projection of the first segment in the first direction is D1, and the length of the projection of the second segment in the first direction is D2, and D1 is greater than D2, which is conducive to providing pressure on the battery cell assembly.

[0018] In one or more optional embodiments above, in some embodiments of the present application, the buffer portion includes a second buffer portion, and along the third direction, the first buffer portion and the second buffer portion are arranged opposite to each other. The second buffer portion connects the second connecting portion and the base portion.

[0019] In one or more of the above optional embodiments, in some embodiments of the present application, the second buffer portion includes a third section and a fourth section, the third section connecting to the base portion, the fourth section including a third subsection and at least one fourth subsection, the third section connecting the third section and the second connecting portion, and the fourth section connecting the third extension portion and / or the fourth extension portion. In the second direction, the fourth section is located to one side of the third section. The fourth section can increase the strength of the elastic member.

[0020] In one or more of the above optional embodiments, in some embodiments of the present application, in the second direction, the fourth segment extends beyond the base.

[0021] In one or more optional embodiments above, in some embodiments of the present application, along the direction opposite to the third direction, the length of the projection of the third segment in the first direction is D3, and the length of the projection of the fourth segment in the first direction is D4, and D3 is greater than D4, which is conducive to providing pressure on the battery cell assembly.

[0022] In one or more of the above optional embodiments, in some embodiments of the present application, the length of the fourth segment is less than the length of the third segment. By reducing the length of the fourth segment, the strength of the elastic member can be increased while facilitating the bending of the third extension portion and the fourth extension portion.

[0023] In one or more optional embodiments above, in some embodiments of the present application, when viewed along the second direction, the second connecting portion extends beyond the second buffer portion in a direction opposite to the third direction, which is beneficial to deformation of the second buffer portion.

[0024] In one or more optional embodiments above, in some embodiments of the present application, a first gap is defined between the base and the housing along the second direction, and the battery module includes a first conductive member connected to the battery cell assembly and passing through the first gap.

[0025] In one or more optional embodiments above, in some embodiments of the present application, a second gap is defined between the base and the housing along the second direction, and the battery module includes a second conductive member connected to the battery cell assembly and passing through the second gap.

[0026] In one or more of the above optional embodiments, in some embodiments of the present application, the housing includes a bottom wall connected to the first side wall and the second side wall. A third fixing portion is provided on the bottom wall, and the third fixing portion is fixed to the second connecting portion. Along the first direction, the projection of the third fixing portion overlaps with the projection of the second connecting portion, thereby transferring the force acting on the buffer portion to the housing.

[0027] In one or more of the above optional embodiments, in some embodiments of the present application, the housing includes a top wall, the top wall and a bottom wall are arranged along a third direction, and the top wall connects the first side wall and the second side wall. A fourth fixing portion is provided on the top wall, and the fourth fixing portion is fixed to the first connecting portion. Along the first direction, the projection of the fourth fixing portion overlaps with the projection of the first connecting portion, thereby transferring the force acting on the buffer portion to the housing.

[0028] In one or more optional embodiments above, in some embodiments of the present application, the shell includes a rear wall, and along the first direction, the battery cell assembly is located between the elastic member and the rear wall, the stiffness of the elastic member is less than the stiffness of the rear wall, and when the battery cell expands, the elastic member deforms before the rear wall, and the elastic member provides expansion space for the battery cell assembly.

[0029] In one or more of the above optional embodiments, in some embodiments of the present application, the housing includes a bottom wall and a top wall, the top wall and the bottom wall being arranged along a third direction. The battery module includes a first insulating sheet, which is disposed between the bottom wall and the battery cell assembly to strengthen insulation between the battery cell assembly and the bottom wall.

[0030] In one or more of the above optional embodiments, in some embodiments of the present application, the battery cell assembly includes a plurality of battery cell units, the battery cell units are connected to a first insulating sheet, and the battery cell units are configured so that when the battery cell expands, the battery cell units move on the first insulating sheet in a direction opposite to the first direction. The buffer portion is configured to provide expansion space for the battery cell.

[0031] In one or more of the above optional embodiments, in some embodiments of the present application, the friction coefficient between the battery cell unit and the first insulating sheet is smaller than the friction coefficient between the battery cell unit and the bottom wall, which is conducive to the movement of the battery cell unit.

[0032] In one or more of the above optional embodiments, in some embodiments of the present application, a battery cell unit includes a battery cell, the battery cell includes a battery cell housing, an electrode assembly, and an electrode terminal, the battery cell housing includes a main body, the electrode assembly is disposed in the main body, and the electrode terminal is connected to the electrode assembly and extends out of the battery cell housing. Along a first direction, the projection of the main body is within the projection of the base, which increases the interaction area between the base and the main body and facilitates the base applying pressure to the main body.

[0033] In one or more of the above optional embodiments, in some embodiments of the present application, the projection of the first extension portion is separated from the projection of the main portion, which facilitates deformation of the first extension portion. Alternatively, the projection of the second extension portion is separated from the projection of the main portion, which facilitates deformation of the second extension portion.

[0034] In one or more of the above optional embodiments, in some embodiments of the present application, the top wall is provided with two second stoppers, the two second stoppers being arranged along the second direction. The main body of each battery cell unit is disposed between the two second stoppers, and the movement of the battery cell assembly is guided by the two second stoppers. Alternatively, the bottom wall is provided with two first stoppers, the two first stoppers being arranged along the second direction, the main body of each battery cell unit is disposed between the two first stoppers, and the movement of the battery cell assembly is guided by the two first stoppers.

[0035] In one or more of the above optional embodiments, in some embodiments of the present application, the battery cell unit includes a bracket that covers a portion of the battery cell housing. The bracket is configured so that when the battery cell expands, the bracket moves on the first insulating sheet in a direction opposite to the first direction. This can reduce friction between the main body and the first insulating sheet during movement, facilitate movement, protect the main body, and reduce the risk of damage to the main body that could affect the use of the battery module.

[0036] In one or more of the above optional embodiments, in some embodiments of the present application, the battery cell housing includes a sealing portion connected to the main body, and the electrode terminals extend from the sealing portion out of the battery cell housing. The bracket covers at least a portion of the main body and at least a portion of the sealing portion to protect the sealing portion.

[0037] In one or more of the above optional embodiments, in some embodiments of the present application, the connecting portion includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are arranged along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other. The first extending portion is connected to the first connecting portion, and the second extending portion is connected to the second connecting portion.

[0038] In one or more of the above optional embodiments, in some embodiments of the present application, adjacent main body parts are in contact and connected, which is conducive to pressurizing the main body parts.

[0039] In one or more of the above optional embodiments, in some embodiments of the present application, adjacent battery cell shells exert pressure on each other, so that multiple battery cell units are in a pressurized state, which is beneficial to improving the service life of the battery cell units.

[0040] In one or more of the above optional embodiments, in some embodiments of the present application, the bracket is integrally formed with the battery cell, which can improve the connection strength between the bracket and the battery cell.

[0041] In one or more of the above optional embodiments, in some embodiments of the present application, the bracket is an insulating bracket, which can reduce the risk of short circuit between the bracket and the battery cell.

[0042] In one or more optional embodiments above, in some embodiments of the present application, the battery module includes a first buffer member, which is arranged between the base and the first battery cell unit. The hardness of the first buffer member is less than the hardness of the base, thereby reducing damage to the first battery cell unit caused by the base.

[0043] In one or more of the above optional embodiments, in some embodiments of the present application, the battery module includes a second buffer member, which is disposed between the second battery cell unit and the rear wall. The second buffer member has a hardness less than that of the rear wall, thereby reducing damage to the second battery cell unit by the rear wall.

[0044] In one or more of the above optional embodiments, in some embodiments of the present application, the first conductive member is configured to move with the elastic member, which can reduce the pulling on the first conductive member, reduce the risk of the first conductive member being broken, and improve the safety of the battery module.

[0045] In one or more of the above optional embodiments, in some embodiments of the present application, the second conductive member and the elastic member are separately arranged, which can reduce the pulling on the second conductive member, reduce the risk of the second conductive member being broken, and improve the safety of the battery module.

[0046] In one or more of the above optional embodiments, in some embodiments of the present application, along the second direction, the distance between the battery cell assembly and the first side wall is greater than the distance between the first connecting portion and the first side wall. When the shell is subjected to an action force, the first connecting portion can buffer the action force, reduce the impact on the battery cell assembly, and help increase the protection of the battery cell assembly.

[0047] In one or more of the above optional embodiments, in some embodiments of the present application, along the second direction, the distance between the battery cell assembly and the first side wall is greater than the distance between the second connecting portion and the first side wall. When the shell is subjected to an action force, the second connecting portion can buffer the action force, reduce the impact on the battery cell assembly, and help increase the protection of the battery cell assembly.

[0048] In one or more optional embodiments above, in some embodiments of the present application, when viewed along the second direction, the second connecting portion extends beyond the second buffer portion in a direction opposite to the third direction, which is beneficial to deformation of the second buffer portion.

[0049] In one or more of the above optional embodiments, in some embodiments of the present application, the connecting portion is provided with a flange, which is formed by folding the connecting portion toward one side of the buffer portion in the third direction. Along the first direction, the flange is located between the connecting portion and the base. The flange can reduce the risk of the connecting portion cutting the first conductive member and the second conductive member.

[0050] In one or more of the above optional embodiments, in some embodiments of the present application, along the first direction, the projection of the flange is separated from the projection of the buffer portion, thereby reducing the impact on the deformation area of ​​the buffer portion.

[0051] An embodiment of the present application provides a battery pack, comprising the battery module and a front cover according to any one of the above embodiments, wherein the front cover is connected to a housing.

[0052] In one or more of the above optional embodiments, in some embodiments of the present application, the front cover is provided with a second space. The battery pack includes a circuit board, which is provided in the second space and is connected to the battery cell assembly.

[0053] In one or more of the above optional embodiments, in some embodiments of the present application, the shell is provided with a first opening, and the front cover is detachably connected to the battery module and closes the first opening.

[0054] In one or more of the above optional embodiments, in some embodiments of the present application, the front cover is detachably connected to the shell.

[0055] An embodiment of the present application provides an electrical device, comprising the battery pack according to any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] FIG1 shows a schematic structural diagram of a battery pack in some embodiments.

[0057] FIG2 shows an exploded schematic diagram of a battery pack in some embodiments.

[0058] FIG3 shows a schematic structural diagram of a battery module in some embodiments.

[0059] FIG4 is a schematic diagram showing a partial structure of a battery module in some embodiments.

[0060] FIG5 is a schematic diagram showing the structure of a battery cell in some embodiments.

[0061] FIG6 shows an exploded schematic diagram of the battery cell in FIG4 .

[0062] FIG7 is a schematic structural diagram of a battery cell unit in some embodiments.

[0063] FIG8 is a schematic structural diagram of a battery cell unit from another perspective in some embodiments.

[0064] FIG9 shows a schematic structural diagram of a battery cell unit from another perspective in some embodiments.

[0065] FIG10 is a schematic diagram showing a partial structure of a battery cell unit in some embodiments.

[0066] FIG11 is a schematic diagram showing a partial structure of a battery cell unit in some embodiments.

[0067] FIG12 shows a schematic structural diagram of a battery cell unit from another perspective in some embodiments.

[0068] FIG13 is a schematic diagram showing a partial structure of a housing in some embodiments.

[0069] FIG14 is a schematic diagram showing a partial structure of a battery module in some embodiments.

[0070] FIG15 is a schematic diagram showing a partial structure of the battery module in FIG14 from another perspective.

[0071] FIG16 is a schematic structural diagram of an elastic member and a portion of a housing in some embodiments.

[0072] FIG. 17 is a schematic structural diagram of an elastic member in some embodiments.

[0073] FIG18 shows a simplified structural diagram of the elastic member from another perspective in some embodiments.

[0074] FIG19 shows a simplified structural diagram of the elastic member from another perspective in some embodiments.

[0075] FIG20 is a schematic structural diagram of an elastic member from another perspective in some embodiments.

[0076] FIG. 21 shows a schematic structural diagram of the elastic member in FIG. 16 from another perspective in some embodiments.

[0077] FIG22 is a schematic structural diagram of an elastic member from another perspective in some embodiments.

[0078] FIG23 shows a schematic structural diagram of elastic members in other embodiments.

[0079] FIG24 shows a schematic structural diagram of elastic members in some further embodiments.

[0080] FIG25 shows a schematic structural diagram of an elastic member in some further embodiments.

[0081] FIG26 shows a schematic structural diagram of an elastic member in some other embodiments.

[0082] FIG27 is a schematic diagram showing the structure of a portion of a battery pack in some embodiments.

[0083] FIG28 shows a schematic structural diagram of some battery modules in some embodiments.

[0084] FIG. 29 is a schematic structural diagram of an elastic member in a compressed state in some embodiments.

[0085] FIG30 is a schematic structural diagram of an elastic member in a compressed state from another perspective in some embodiments.

[0086] FIG31 shows a schematic structural diagram of the bending of the first extension portion and the second extension portion in some embodiments.

[0087] FIG32 shows a schematic structural diagram of the bending of the first extension portion and the second extension portion in some embodiments.

[0088] FIG33 is a schematic structural diagram of an elastic member and a reinforcing plate in some embodiments.

[0089] FIG34 shows a schematic structural diagram of electrical equipment in some embodiments.

[0090] Description of main component symbols:

[0091] Battery module 100

[0092] Reinforcement plate 100a

[0093] Housing 10

[0094] First space 10a

[0095] First opening 10b

[0096] First side wall 11

[0097] First fixing portion 111

[0098] Second side wall 12

[0099] The second fixing portion 121

[0100] Bottom wall 13

[0101] The third fixing portion 131

[0102] First limiting member 13a

[0103] Top wall 14

[0104] Fourth fixing portion 141

[0105] The second limiting member 14a

[0106] Back wall 15

[0107] Front cover 16

[0108] Second Space 161

[0109] Battery cell assembly 20

[0110] Battery cell unit 20a

[0111] The first battery cell unit 201

[0112] The second battery cell unit 202

[0113] Battery Cell 21

[0114] Cell case 21a

[0115] Main body 211

[0116] First wall 211c

[0117] Second wall 211d

[0118] Third wall 211e

[0119] First shell 2111

[0120] First recess 2111a

[0121] Second housing 2112

[0122] Second recess 2112a

[0123] First extended edge 2113

[0124] Second extended edge 2114

[0125] Sealing portion 212

[0126] First sealing portion 212a

[0127] First sealing connection portion 2121

[0128] First bending portion 2122

[0129] Second sealing portion 212b

[0130] Electrode assembly 21b

[0131] Electrode terminal 21c

[0132] Bracket 22

[0133] First bracket 22a

[0134] Second bracket 22b

[0135] Part 1 221

[0136] First side portion 222

[0137] First side extension 224

[0138] Part II 226

[0139] Projection 227

[0140] Accommodation groove 227a

[0141] Gap 228

[0142] Elastic member 30

[0143] First gap 301

[0144] Second gap 302

[0145] base 31

[0146] Buffer portion 32

[0147] First buffer portion 321

[0148] Section 1, 321a

[0149] Section 2, 321b

[0150] First segment 3211

[0151] Second segment 3212

[0152] Second buffer portion 322

[0153] Section 322a

[0154] Section 4, 322b

[0155] The third segment 3221

[0156] Fourth Segment 3222

[0157] Connecting portion 33

[0158] First connecting portion 33a

[0159] First extension portion 331

[0160] Second extension portion 332

[0161] Second connecting portion 33b

[0162] The third extension portion 333

[0163] Fourth extension portion 334

[0164] Flanged 33c

[0165] The first conductive member 40

[0166] The second conductive member 50

[0167] Circuit board 60

[0168] Sampling piece 70

[0169] First buffer member 101

[0170] Second buffer member 102

[0171] Wire 103

[0172] First insulating sheet 110

[0173] Battery Pack 200

[0174] First connection end 200a

[0175] Second connection end 200b

[0176] Electrical equipment 300

[0177] First direction X

[0178] Second direction Y

[0179] The third direction Z

[0180] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0181] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0182] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centrally disposed element. When an element is considered to be "disposed" or "provided on" another element, it may be directly disposed on the other element or there may be a centrally disposed element.

[0183] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0184] It should be understood that, considering the factors of actual processing tolerance, the term "perpendicular" in the technical solution of this application is used to describe the ideal state between two components. In the actual production or use state, there may be a state that is approximately perpendicular between the two components. For example, in combination with the numerical description, perpendicularity can refer to the angle between two straight lines being between 90°±10°, perpendicularity can also refer to the dihedral angle between two planes being between 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane being between 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 point of view, the components can be considered as "straight lines" or "planes" if the overall extension direction is a straight line or a plane.

[0185] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0186] The terms "left", "right", "top", "bottom", "front", "back" and similar expressions used herein are for illustrative purposes only and are not intended to limit the present application.

[0187] Unless otherwise defined, the term "plurality" herein, when used to describe the number of components, specifically means that the number of the components is two or more.

[0188] In the first direction X, it includes the first direction X and the direction opposite to the first direction X, in the second direction Y, it includes the second direction Y and the direction opposite to the second direction Y, and in the third direction Z, it includes the third direction Z and the direction opposite to the third direction Z.

[0189] For the convenience of description, some electrode terminals are not shown in a bent state in the drawings.

[0190] An embodiment of the present application provides a battery module, comprising: a shell, a battery cell assembly and an elastic member. The battery cell assembly is arranged in the shell. The elastic member is arranged in the shell, and the elastic member and the battery cell assembly are arranged along a first direction. The elastic member includes a base, a buffer portion and a connecting portion. The base is connected to the battery cell assembly. The buffer portion is connected to the connecting portion and the base. The shell includes a first fixing portion and a second fixing portion. In the second direction, the connecting portion includes a first extension portion and a second extension portion extending beyond the base, the first extension portion being connected to the first fixing portion, and the second extension portion being connected to the second fixing portion. When viewed along the first direction, in the second direction, the first extension portion and the second extension portion are respectively located on both sides of the base, and the first direction is perpendicular to the second direction. By connecting the first extension portion located on both sides of the base to the first fixing portion and the second extension portion to the second fixing portion, further expansion space can be provided for the battery cell assembly, reducing the impact on the battery cell assembly and increasing protection for the battery cell assembly.

[0191] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features of the embodiments may be combined with each other.

[0192] Referring to FIG. 1 to FIG. 3 , an embodiment of the present application provides a battery module 100 , including a housing 10 and a cell assembly 20 . The cell assembly 20 is disposed in the housing 10 .

[0193] In some embodiments, the battery module 100 includes an elastic member 30 . The elastic member 30 is disposed in the housing 10 . The elastic member 30 and the battery cell assembly 20 are arranged along a first direction X.

[0194] In some embodiments, the elastic member 30 includes a base portion 31 , a buffer portion 32 and a connecting portion 33 . The base portion 31 is connected to the battery cell assembly 20 , and the buffer portion 32 connects the base portion 31 and the connecting portion 33 .

[0195] In some embodiments, the elastic member 30 is configured to apply pressure to the battery cell assembly 20 and provide expansion space for the battery cell assembly 20 .

[0196] In some embodiments, the buffer portion 32 is configured to provide expansion space for the battery cell assembly 20 .

[0197] In some embodiments, referring to FIG. 2 , FIG. 3 , and FIG. 16 , the housing 10 includes a first side wall 11 and a second side wall 12 , and the first side wall 11 and the second side wall 12 are arranged along a second direction Y. Along the second direction Y, the battery cell assembly 20 is located between the first side wall 11 and the second side wall 12 . The first direction X is perpendicular to the second direction Y.

[0198] In some embodiments, the housing 10 includes a bottom wall 13 and a top wall 14. The top wall 14 and the bottom wall 13 are arranged along a third direction Z, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The bottom wall 13 connects the first side wall 11 and the second side wall 12, and the top wall 14 connects the first side wall 11 and the second side wall 12. Along the third direction Z, the battery cell assembly 20 is located between the bottom wall 13 and the top wall 14.

[0199] In some embodiments, the bottom wall 13 is configured to support the battery cell assembly 20 .

[0200] In some embodiments, the housing 10 includes a rear wall 15 that connects the first side wall 11, the second side wall 12, the bottom wall 13, and the top wall 14. The elastic member 30, the battery cell assembly 20, and the rear wall 15 are arranged along a first direction X. Along the first direction X, the battery cell assembly 20 is disposed between the elastic member 30 and the rear wall 15.

[0201] In some embodiments, the first side wall 11 , the second side wall 12 , the bottom wall 13 , the top wall 14 and the rear wall 15 form a first space 10 a and a first opening 10 b , and the elastic member 30 and the battery cell assembly 20 are located in the first space 10 a .

[0202] Referring to FIG. 4 to FIG. 12 , in some embodiments, the battery cell assembly 20 includes a plurality of battery cell units 20 a , and the plurality of battery cell units 20 a are stacked along a first direction X.

[0203] In some embodiments, the battery cell unit 20a includes a first battery cell unit 201 and a second battery cell unit 202, wherein the first battery cell unit 201 and the second battery cell unit 202 are the battery cell units located on the outermost sides of the battery cell assembly 20, wherein the first battery cell unit 201 is connected to the elastic member 30, and the second battery cell unit 202 is connected to the rear wall 15.

[0204] In some embodiments, the battery cell unit 20a includes a battery cell 21, the battery cell 21 includes a battery cell shell 21a, an electrode assembly 21b and an electrode terminal 21c, the battery cell shell 21a includes a main body 211, the electrode assembly 21b is located in the main body 211, and the electrode terminal 21c is connected to the electrode assembly 21b and extends out of the battery cell shell 21a.

[0205] In some embodiments, the battery cell unit 20 a is connected to the bottom wall 13 , and the battery cell unit 20 a is configured such that when the battery cell 21 expands, the battery cell unit 20 a moves relative to the bottom wall 13 in a direction opposite to the first direction X.

[0206] In some embodiments, the battery cell unit 20 a is connected to the bottom wall 13 , and the battery cell unit 20 a is configured to move relative to the bottom wall 13 along the first direction X when the expansion of the battery cell 21 decreases.

[0207] In some embodiments, the battery module 100 includes a first insulating sheet 110 . The first insulating sheet 110 is disposed between the bottom wall 13 and the battery cell assembly 20 to strengthen the insulation between the battery cell assembly 20 and the bottom wall 13 .

[0208] In some embodiments, the battery cell assembly 20 is connected to the first insulating sheet 110 , and the battery cell unit 20 a is configured such that, when the battery cell unit 20 a expands, the battery cell unit 20 a moves on the first insulating sheet 110 in a direction opposite to the first direction X. For example, the battery cell assembly 20 is in contact with the first insulating sheet 110 .

[0209] In some embodiments, the battery cell assembly 20 is connected to the first insulating sheet 110 , and the battery cell unit 20 a is configured such that, when the battery cell 21 expands and decreases, the battery cell unit 20 a moves on the first insulating sheet 110 along the first direction X. For example, the battery cell assembly 20 is in contact with the first insulating sheet 110 .

[0210] In some embodiments, the friction coefficient between the battery cell unit 20 a and the first insulating sheet 110 is smaller than the friction coefficient between the battery cell unit 20 a and the bottom wall 13 , which facilitates the movement of the battery cell unit 20 a .

[0211] In some embodiments, the cell casing 21 a includes a sealing portion 212 , the sealing portion 212 is connected to the main body 211 , and the electrode terminal 21 c extends from the sealing portion 212 out of the cell casing 21 a .

[0212] In some embodiments, the main body 211 includes a first shell 2111 and a second shell 2112. The first shell 2111 is provided with a first recess 2111a, and the second shell 2112 is provided with a second recess 2112a. The first shell 2111 is connected to the second shell 2112 to form a storage space. The electrode assembly 21b is partially provided in the first recess 2111a, and partially provided in the second recess 2112a. The circumference of the first shell 2111 extends outward to form a first extended edge 2113, and the circumference of the second shell 2112 extends outward to form a second extended edge 2114. After the first shell 2111 is connected to the second shell 2112, the first extended edge 2113 and the second extended edge 2114 overlap and are sealed together to form a sealing portion 212.

[0213] In some embodiments, the sealing portion 212 includes a first sealing portion 212 a , and the electrode terminal 21 c extends from the first sealing portion 212 a out of the cell housing 21 a .

[0214] In some embodiments, the sealing portion 212 includes a second sealing portion 212 b connected to the first sealing portion 212 a .

[0215] In some embodiments, the first extended edge 2113 and the second extended edge 2114 overlap and are sealed to form two first sealing portions 212a and two second sealing portions 212b. The two first sealing portions 212a are arranged along the second direction Y, and the two second sealing portions 212b are arranged along the third direction Z. One first sealing portion 212a connects the two second sealing portions 212b, and the other first sealing portion 212a connects the two second sealing portions 212b.

[0216] In some embodiments, the battery cell 21 includes two electrode terminals 21c, wherein one electrode terminal 21c extends from one of the two first sealing portions 212a out of the battery cell housing 21a, and the other electrode terminal 21c extends from the other of the two first sealing portions 212a out of the battery cell housing 21a.

[0217] In some embodiments, two electrode terminals 21 c extend out of the cell casing 21 a from the same first sealing portion 212 a .

[0218] In some embodiments, adjacent main body portions 211 are in contact and connected, which facilitates pressurization of the main body portions 211 .

[0219] In some embodiments, adjacent battery cell casings 21 a exert pressure on each other, so that the multiple battery cell units 20 a are in a pressurized state, which is beneficial to improving the service life of the battery cell units 20 a.

[0220] In some embodiments, the first sealing portion 212a includes a first sealing connection portion 2121 and two first bent portions 2122. The first sealing connection portion 2121 connects the two first bent portions 2122. The two first bent portions 2122 are arranged opposite each other along the third direction Z. The electrode terminal 21c extends from the first sealing connection portion 2121 out of the battery cell housing 21a.

[0221] In some embodiments, the cell housing 21 a includes an aluminum-plastic film.

[0222] In some embodiments, the battery cell 21 includes but is not limited to a soft-pack battery cell, a square battery cell, and a round battery cell.

[0223] In some embodiments, each battery cell unit 20 a further includes a bracket 22 , which covers at least a portion of the battery cell casing 21 a .

[0224] In some embodiments, the bracket 22 is configured such that, when the battery cell 21 expands, the bracket 22 moves relative to the bottom wall 13 in a direction opposite to the first direction X.

[0225] In some embodiments, the bracket 22 is configured so that when the expansion of the battery cell 21 decreases, the bracket 22 moves relative to the bottom wall 13 along the first direction X.

[0226] In some embodiments, the bracket 22 is connected to the bottom wall 13 , and the bracket 22 is configured to move relative to the bottom wall 13 in a direction opposite to the first direction X when the battery cell 21 expands.

[0227] In some embodiments, the bracket 22 is connected to the bottom wall 13 , and the bracket 22 is configured to move relative to the bottom wall 13 along the first direction X when the expansion of the battery cell 21 decreases.

[0228] In some embodiments, the bracket 22 contacts and connects to the first insulating sheet 110 , and the bracket 22 is configured to move on the first insulating sheet 110 in a direction opposite to the first direction X when the battery cell 21 expands.

[0229] In some embodiments, the bracket 22 contacts and connects to the first insulating sheet 110 , and the bracket 22 is configured to move on the first insulating sheet 110 along the first direction X when the expansion of the battery cell 21 decreases.

[0230] In some embodiments, the bracket 22 is integrally formed with the battery cell 21, which can enhance the connection strength between the bracket 22 and the battery cell 21. Integral formation refers to direct fixation of the bracket 22 and the battery cell 21. Integral formation methods include, but are not limited to, potting and injection molding.

[0231] In some embodiments, after the insulating material is placed around the battery cell 21 through a pouring process, the insulating material is solidified to form a bracket 22, and the bracket 22 and the battery cell 21 are bonded and fixed. For example, the battery cell 21 is placed in a mold, and the insulating material is poured into the mold. After the insulating material is solidified to form the bracket 22 and is bonded and fixed to the battery cell 21, the bracket 22 and the battery cell 21 are taken out of the mold.

[0232] In some embodiments, the insulating material includes but is not limited to potting compound and foaming compound.

[0233] In some embodiments, the injection molding process includes placing the battery cell 21 into a mold, heating and melting the insulating material with an injection molding machine, allowing the melted insulating material to flow into the mold, and solidifying the insulating material to form the bracket 22, which is bonded and fixed to the battery cell 21. The bracket 22 and battery cell 21 are then removed from the mold. Optionally, the insulating material includes polyamide.

[0234] In some embodiments, the bracket 22 is an insulating bracket, which can reduce the risk of short circuit between the bracket 22 and the battery cell 21 .

[0235] In some embodiments, the bracket 22 includes a first bracket 22 a that covers at least a portion of the sealing portion 212 .

[0236] In some embodiments, the first bracket 22a includes at least one first side portion 222, and each first side portion 222 covers a first bending portion 2122. By the first bracket 22a covering a portion of the first sealing portion 212a, protection of the first sealing portion 212a is increased.

[0237] In some embodiments, the first side portion 222 is connected to the bottom wall 13 . The first side portion 222 is configured such that when the battery cell 21 expands, the first side portion 222 moves relative to the bottom wall 13 in a direction opposite to the first direction X.

[0238] In some embodiments, the first side portion 222 is connected to the bottom wall 13 . The first side portion 222 is configured to move relative to the bottom wall 13 along the first direction X when the expansion of the battery cell 21 decreases.

[0239] In some embodiments, the first side portion 222 is connected to the first insulating sheet 110 . The first side portion 222 is configured such that, when the battery cell 21 expands, the first side portion 222 moves on the first insulating sheet 110 in a direction opposite to the first direction X. For example, the first side portion 222 contacts and connects to the first insulating sheet 110 .

[0240] In some embodiments, the first side portion 222 is connected to the first insulating sheet 110 and is configured such that, when the battery cell 21 expands less, the first side portion 222 moves on the first insulating sheet 110 along the first direction X. For example, the first side portion 222 contacts and connects to the first insulating sheet 110 .

[0241] In some embodiments, the first bracket 22 a includes two first side portions 222 , and the first side portions 222 are arranged along the third direction Z. One of the first side portions 222 is connected to the first insulating sheet 110 .

[0242] When the battery cell 21 expands, the first sealing portion 212a can move on the first insulating sheet 110 through the first side portion 222, and the first side portion 222 can reduce the friction between the first sealing portion 212a and the first insulating sheet 110 during movement, thereby facilitating movement and protecting the first sealing portion 212a, and reducing the risk of damage to the first sealing portion 212a and affecting the use of the battery module 100.

[0243] In some embodiments, the first bracket 22a includes a first portion 221 , and the first portion 221 covers at least a portion of the first sealing connection portion 2121 to increase protection for the first sealing portion 212a.

[0244] In some embodiments, along the third direction Z, one end of the first portion 221 is connected to the first side portion 222 , and the other end is connected to another first side portion 222 , which can increase the structural strength of the first bracket 22a and facilitate protection of the first sealing portion 212a .

[0245] In some embodiments, the first bracket 22a includes at least one first side extension 224, which covers a portion of the main body 211. The first side extension 224 can protect the main body 211 and increase the connection strength between the first bracket 22a and the battery cell 21.

[0246] In some embodiments, the first bracket 22a includes at least one first side extension 224. The first side extension 224 covers a portion of the main body 211 and one of the second sealing portions 212b. The first side extension 224 and the second sealing portion 212b are located on the same side of the main body 211. The first side extension 224 protects the main body 211 and the second sealing portion 212b and increases the connection strength between the first bracket 22a and the battery cell 21.

[0247] In some embodiments, the first bracket 22a includes two first side extensions 224, which are arranged along the third direction Z. One of the first side extensions 224 covers a portion of the main body 211 and one of the second sealing portions 212b, and the first side extension 224 and the second sealing portion 212b are located on the same side of the main body 211. The other first side extension 224 covers a portion of the main body 211 and the other second sealing portion 212b, and the first side extension 224 and the second sealing portion 212b are located on the same side of the main body 211. The first side extensions 224 protect the main body 211 and the second sealing portion 212b and increase the connection strength between the first bracket 22a and the battery cell 21.

[0248] In some embodiments, the first side extension 224 is connected to the bottom wall 13 . The first side extension 224 is configured to move relative to the bottom wall 13 in a direction opposite to the first direction X when the battery cell 21 expands.

[0249] In some embodiments, the first side extension 224 is connected to the bottom wall 13 . The first side extension 224 is configured to move relative to the bottom wall 13 along the first direction X when the expansion of the battery cell 21 decreases.

[0250] In some embodiments, the first side extension 224 is connected to the first insulating sheet 110 . The first side extension 224 is configured such that, when the battery cell 21 expands, the first side extension 224 moves on the first insulating sheet 110 in a direction opposite to the first direction X. For example, the first side extension 224 contacts and connects to the first insulating sheet 110 .

[0251] In some embodiments, the first side extension 224 is connected to the first insulating sheet 110 . The first side extension 224 is configured such that, when the battery cell 21 expands less, the first side extension 224 moves on the first insulating sheet 110 along the first direction X. For example, the first side extension 224 contacts and connects to the first insulating sheet 110 .

[0252] When the battery cell 21 expands, the main body 211 can move on the first insulating sheet 110 through the first side extension portion 224, and the first side extension portion 224 can reduce the friction between the main body 211 and the first insulating sheet 110 during movement, thereby facilitating movement and protecting the main body 211, and reducing the risk of damage to the main body 211 and affecting the use of the battery module 100.

[0253] In some embodiments, the first side extension portion 224 extends from the first side portion 222 , which helps to strengthen the connection strength between the first side extension portion 224 and the first side portion 222 .

[0254] In some embodiments, the main body 211 includes a first wall 211 c , and the first sealing portion 212 a is connected to the first wall 211 c .

[0255] In some embodiments, the first bracket 22a includes a second portion 226 that covers a portion of the first wall 211c to protect the main body 211. One end of the first portion 221 is connected to one of the first side portions 222, and the other end is connected to the other first side portion 222. One end of the second portion 226 is connected to one of the first side portions 222, and the other end is connected to the other first side portion 222. This further increases the structural strength of the first bracket 22a and further facilitates protection of the first sealing portion 212a.

[0256] In some embodiments, the first bracket 22a includes two second portions 226 and two first walls 211c.

[0257] In some embodiments, the first bracket 22a includes a protrusion 227, which protrudes from the first portion 221 in a direction opposite to the second direction Y.

[0258] In some embodiments, the battery module 100 includes a detection member (not shown). A receiving groove 227a is provided on the side of the protrusion 227 facing away from the electrode terminal 21c. The detection member is received within the receiving groove 227a. The detection member is configured to detect the temperature of the battery cell 21. Optionally, the detection member is configured to detect the temperature of the electrode terminal 21c, which helps improve the accuracy of detecting the temperature of the battery cell 21.

[0259] 11 , viewed from a direction opposite to the first direction X, the electrode terminal 21 c is not blocked by the protrusion 227 . In some embodiments, the main body 211 includes two second walls 211 d arranged along the first direction X. The first wall 211 c connects the second wall 211 d and the first sealing portion 212 a .

[0260] In some embodiments, referring to FIG. 12 , when viewed along the second direction Y, in the first direction X,

[0261] The second portion 226 does not extend beyond the second wall 211d, so that the main bodies 211 of adjacent battery cells 21 can be in contact and connected.

[0262] Adjacent battery cells 21 apply pressure to each other through the main body 211 .

[0263] In some embodiments, referring to FIG. 12 , when viewed along the second direction Y, in the first direction X, the second portion 226 is located between the two second walls 211 d. When the main bodies 211 of adjacent battery cells 21 apply pressure to each other, the force on the first sealing portion 212 a can be reduced, thereby improving protection of the first sealing portion 212 a.

[0264] In some embodiments, referring to FIG. 12 , as viewed along the second direction Y, in the first direction X, the first side portion 222 is located between the two second walls 211 d and . When the main bodies 211 of adjacent battery cells 21 apply pressure to each other, the force on the first sealing portion 212 a can be reduced, thereby improving protection of the first sealing portion 212 a.

[0265] In some embodiments, referring to FIG. 12 , as viewed along the second direction Y, in the first direction X, the first side extension 224 is located between the two second walls 211 d and . When the main bodies 211 of adjacent battery cells 21 apply pressure to each other, the force on the main body 211 and the second sealing portion 212 b can be reduced, thereby improving the protection of the main body 211 and the second sealing portion 212 b.

[0266] In some embodiments, the bracket 22 includes a second bracket 22 b connected to another first sealing portion 212 a .

[0267] In some embodiments, the first bracket 22a and the second bracket 22b have the same structure.

[0268] In some embodiments, the first bracket 22a and the second bracket 22b are similar, so repeated description of the same or similar configurations as the first bracket 22a of the previous embodiment will be omitted, and hereinafter, attention will be paid to the structures different from the previous embodiment.

[0269] Referring to Figures 8 and 9 , in some embodiments, the second bracket 22b has a notch 228. A portion of the first sealing connection portion 2121 of the first sealing portion 212a is located within the notch 228. When the battery cell 21 expands, pressure within the battery cell 21 can be released through the first sealing connection portion 2121 within the notch 228, thereby facilitating pressure relief and improving the safety of the battery cell unit 20a.

[0270] In some embodiments, the notch 228 and the detection member are provided on different brackets to reduce the risk of damaging the detection member during pressure relief.

[0271] In some embodiments, the first bracket 22a may be provided with a notch 228 as shown in the second bracket 22b.

[0272] Referring to FIG. 9 , in some embodiments, the second bracket 22 b is not provided with the protrusion 227 shown in FIG. 7 .

[0273] Referring to Figures 2 and 13 , in some embodiments, the bottom wall 13 is provided with two first stoppers 13a, which are spaced apart along the second direction Y and each extend along the first direction X. A portion of the battery cell assembly 20 is positioned between the two first stoppers 13a, and the two first stoppers 13a guide the movement of the battery cell assembly 20. Alternatively, the two first stoppers 13a guide the movement of the battery cell assembly 20 in a direction opposite to the first direction X. Optionally, the first stoppers 13a are formed by protruding from the bottom wall 13 toward the top wall 14.

[0274] In some embodiments, the main body of each battery cell unit 20a is disposed between two first limiting members 13a.

[0275] Referring to Figures 2 and 14 , in some embodiments, the top wall 14 is provided with two second stoppers 14a, spaced apart along the second direction Y, and each second stopper 14a extending along the first direction X. A portion of the battery cell assembly 20 is positioned between the two second stoppers 14a, further guiding the movement of the battery cell assembly 20. Optionally, the two second stoppers 14a guide the movement of the battery cell assembly 20 in a direction opposite to the first direction X. Optionally, the second stoppers 14a are formed by protruding from the top wall 14 toward the bottom wall 13.

[0276] In some embodiments, the main body of each battery cell unit 20 a is disposed between two second limiting members 14 a .

[0277] In some embodiments, the bottom wall 13 is provided with two first limiting members 13 a, and the top wall 14 is provided with two second limiting members 14 a.

[0278] 13 to 28 , in some embodiments, along the first direction X, the battery cell assembly 20 is located between the base 31 and the rear wall 15 , the rear wall 15 is connected to the battery cell assembly 20 , and the base 31 is connected to the battery cell assembly 20 . The base 31 is configured to apply pressure to the battery cell assembly 20 .

[0279] In some embodiments, the elastic member 30 has a stiffness greater than that of the rear wall 15 . When the battery cell 21 expands, the elastic member 30 deforms before the rear wall 15 . The elastic member 30 provides expansion space for the battery cell assembly 20 .

[0280] In some embodiments, the base 31 is connected to the first battery cell unit 201. Alternatively, the base 31 is in contact with and connected to the first battery cell unit 201. Alternatively, the base 31 and the first battery cell unit 201 may provide other component connections.

[0281] In some embodiments, the battery module 100 includes a first buffer member 101, which is disposed between the base 31 and the first battery cell unit 201. Optionally, the first buffer member 101 includes foam.

[0282] In some embodiments, the hardness of the first buffer 101 is less than that of the base 31 , thereby reducing damage to the first battery cell 201 caused by the base 31 .

[0283] In some embodiments, the rear wall 15 is connected to the second battery cell unit 202 .

[0284] In some embodiments, the battery module 100 includes a second buffer 102, which is disposed between the second battery cell unit 202 and the rear wall 15. Optionally, the first buffer includes foam.

[0285] In some embodiments, the hardness of the second buffer 102 is less than that of the rear wall 15 , thereby reducing damage to the second battery cell unit 202 caused by the rear wall 15 .

[0286] In some embodiments, the foam material includes ethylene vinyl acetate (EVA). Referring to Figure 33 , in some embodiments, the battery module 100 includes a reinforcing plate 100a disposed between the base 31 and the first buffer member 101. The reinforcing plate 100a supports the base 31, reducing the risk of deformation of the base 31 and increasing the pressure exerted by the base 31 on the battery cell assembly 20, thereby extending the service life of the battery cell assembly 20.

[0287] In some embodiments, along the first direction X, the projection of the main body 211 is located within the projection of the base 31 , which increases the interaction area between the base 31 and the main body 211 and facilitates the base 31 to apply pressure to the main body 211 .

[0288] 3 , 4 , and 15 , in some embodiments, the battery module 100 includes a first conductive member 40 . Along the second direction Y, a first gap 301 is defined between the base 31 and the housing 10 . One end of the first conductive member 40 is connected to the battery cell assembly 20 , and the other end passes through the first gap 301 .

[0289] In some embodiments, along the second direction Y, a first gap 301 is defined between the base 31 and the second sidewall 12 .

[0290] In some embodiments, one end of the first conductive member 40 is connected to the first battery cell unit 201 .

[0291] In some embodiments, the first conductive member 40 is fixed to the elastic member 30 .

[0292] In some embodiments, the first conductive member 40 is configured to move with the elastic member 30. When the battery cell expands, vibrates, or falls, the first conductive member 40 moves with the elastic member 30, thereby reducing the pulling on the first conductive member 40 and the risk of breaking the first conductive member 40, thereby improving the safety of the battery module 100. Optionally, the first conductive member 40 includes a wiring harness.

[0293] In some embodiments, the first conductive member 40 is configured to transmit power to the battery cell assembly 20. The first conductive member 40 can transmit power to the battery cell assembly 20. When the battery module 100 is discharging, the electrical energy of the battery cell assembly 20 can be transmitted to the load of the electrical device through the first conductive member 40 to power the load of the electrical device. When the battery module 100 is charging, external electrical energy can be transmitted to the battery cell assembly 20 through the first conductive member 40 to charge the battery cell assembly 20.

[0294] Referring to Figures 3, 4 and 15, in some embodiments, the battery module 100 includes a second conductive member 50, a second gap 302 is defined between the base 31 and the shell 10, one end of the second conductive member 50 is connected to the battery cell assembly 20, and the other end passes through the second gap 302.

[0295] In some embodiments, a second gap 302 is defined between the base 31 and the first sidewall 11 .

[0296] In some embodiments, one end of the second conductive member 50 is connected to the second battery cell unit 202 .

[0297] In some embodiments, the second conductive member 50 and the elastic member 30 are separately provided. When the battery cell 20a expands, vibrates, or falls, the second conductive member 50 and the elastic member 30 are separated. This can reduce pulling on the second conductive member 50, lowering the risk of the second conductive member 50 being broken, and improving the safety of the battery module 100. Optionally, the second conductive member 50 includes a wiring harness.

[0298] In some embodiments, the second conductive member 50 is configured to transmit power to the battery cell assembly 20. The second conductive member 50 can transmit power to the battery cell assembly 20. When the battery module 100 is discharging, the electrical energy of the battery cell assembly 20 can be transmitted to the load of the electrical device through the second conductive member 50, thereby powering the load of the electrical device. When the battery module is charging, external electrical energy can be transmitted to the battery cell assembly 20 through the second conductive member 50, thereby charging the battery cell assembly 20.

[0299] In some embodiments, one of the first conductive member 40 and the second conductive member 50 is connected to the common positive terminal of the battery cell assembly 20 , and the other is connected to the common negative terminal of the battery cell assembly 20 .

[0300] In some embodiments, along the second direction Y, the distance between the battery cell assembly 20 and the first side wall 11 is h2 mm (millimeter), where h2 is the minimum distance between the electrode terminals 21 c of the plurality of battery cells 21 and the first side wall 11 .

[0301] In some embodiments, the distance between the connection portion 33 and the first sidewall 11 along the second direction Y is h1 mm (millimeter), where h1 is the minimum distance between the connection portion 33 and the first sidewall 11, and h1 is less than h2. When the housing 10 is subjected to a force, the connection portion 33 can buffer the force, reducing the impact on the battery cell assembly 20 and facilitating enhanced protection for the battery cell assembly 20.

[0302] In some embodiments, the distance between the battery cell assembly 20 and the second side wall 12 is h4 mm (millimeter), where h4 is the minimum distance between the electrode terminals 21 c of the plurality of battery cells 21 and the second side wall 12 .

[0303] In some embodiments, along the second direction Y, the distance between the connection portion 33 and the second sidewall 12 is h3 mm (millimeter), where h3 is the minimum distance between the connection portion 33 and the second sidewall 12. h3 is less than h4. When the housing 10 is subjected to a force, the connection portion 33 can buffer the force, further reducing the impact on the battery cell assembly 20 and further facilitating enhanced protection for the battery cell assembly 20.

[0304] In some embodiments, the connection portion 33 includes a first connection portion 33a. Along the second direction Y, the distance between the first connection portion 33a and the first sidewall 11 is h1a mm (millimeter), where h1a represents the minimum distance between the first connection portion 33a and the first sidewall 11. h1a is less than h2. When a force is applied to the housing 10, the first connection portion 33a can buffer the force, reducing the impact on the battery cell assembly 20 and facilitating enhanced protection for the battery cell assembly 20.

[0305] In some embodiments, along the second direction Y, the distance between the first connection portion 33a and the second sidewall 12 is h3a mm (millimeter), where h3a represents the minimum distance between the first connection portion 33a and the second sidewall 12. h3a is less than h4. When a force is applied to the housing 10, the first connection portion 33a can buffer the force, further reducing the impact on the battery cell assembly 20 and further enhancing protection for the battery cell assembly 20.

[0306] In some embodiments, the connecting portion 33 includes a second connecting portion 33 b , and the first connecting portion 33 a and the second connecting portion 33 b are disposed opposite to each other along the third direction Z. The first direction X, the second direction Y, and the third direction are perpendicular to each other.

[0307] In some embodiments, the second connecting portion 33 b is connected to the housing 10 .

[0308] In some embodiments, the distance between the second connection portion 33b and the first sidewall 11 along the second direction Y is h1b mm (millimeter), where h1b is the minimum distance between the second connection portion 33b and the first sidewall 11, and h1b is less than h2. When a force is applied to the housing 10, the second connection portion 33b can buffer the force, reducing the impact on the battery cell assembly 20 and facilitating enhanced protection for the battery cell assembly 20.

[0309] In some embodiments, the distance between the second connecting portion 33b and the second sidewall 12 along the second direction Y is h3b mm (millimeter), where h3b is the minimum distance between the second connecting portion 33b and the second sidewall 12, and h3b is less than h4. When a force is applied to the housing 10, the second connecting portion 33b and the connecting portion 33 can buffer the force, further reducing the impact on the battery cell assembly 20 and further facilitating enhanced protection for the battery cell assembly 20.

[0310] In some embodiments, hi is the smaller of hia and hib.

[0311] In some embodiments, h3 is the smaller of h3a and h3b.

[0312] Referring to FIG. 15 to FIG. 27 , in some embodiments, the housing 10 includes a first fixing portion 111 , and the first fixing portion 111 is disposed on at least one of the first side wall 11 , the second side wall 12 , the bottom wall 13 , and the top wall 14 .

[0313] In some embodiments, the first fixing portion 111 is provided on the first side wall 11, and the first fixing portion 111 is fixed to the first side wall 11. Optionally, the first fixing portion 111 and the first side wall 11 are integrally formed.

[0314] In some embodiments, the first fixing portion 111 is connected to the first side wall 11. Alternatively, the first fixing portion 111 is welded to the first side wall 11. Alternatively, the first fixing portion 111 is connected to the first side wall 11 by a fastener such as a screw.

[0315] In some embodiments, the housing 10 includes a second fixing portion 121 , which is disposed on at least one of the first side wall 11 , the second side wall 12 , the bottom wall 13 , and the top wall 14 .

[0316] In some embodiments, the second fixing portion 121 is provided on the second side wall 12, and the second fixing portion 121 is fixed to the second side wall 12. Optionally, the second fixing portion 121 and the second side wall 12 are integrally formed.

[0317] In some embodiments, the second fixing portion 121 is connected to the second side wall 12. Alternatively, the second fixing portion 121 is welded to the second side wall 12. Alternatively, the second fixing portion 121 is connected to the second side wall 12 by fasteners such as screws.

[0318] In some embodiments, the first fixing portion 111 is provided on the bottom wall 13, and the first fixing portion 111 is fixed to the bottom wall 13. Optionally, the first fixing portion 111 and the bottom wall 13 are integrally formed.

[0319] In some embodiments, the first fixing portion 111 is connected to the bottom wall 13. Alternatively, the first fixing portion 111 is welded to the bottom wall 13. Alternatively, the first fixing portion 111 is connected to the bottom wall 13 by fasteners such as screws.

[0320] In some embodiments, the second fixing portion 121 is provided on the top wall 14, and the second fixing portion 121 is fixed to the top wall 14. Optionally, the second fixing portion 121 and the top wall 14 are integrally formed.

[0321] In some embodiments, the second fixing portion 121 is connected to the top wall 14. Alternatively, the second fixing portion 121 is welded to the top wall 14. Alternatively, the second fixing portion 121 is connected to the top wall 14 by fasteners such as screws.

[0322] In some embodiments, along the second direction Y or along a direction opposite to the second direction Y, the connecting portion 33 includes a first extending portion 331 extending beyond the base portion 31 , and the first extending portion 331 is connected to the first fixing portion 111 .

[0323] In some embodiments, along the second direction Y or along a direction opposite to the second direction Y, the connecting portion 33 includes a second extending portion 332 extending beyond the base portion 31 , and the second extending portion 332 is connected to the second fixing portion 121 .

[0324] 21 to 26 , viewed along the first direction X, the first extension portion 331 and the second extension portion 332 are respectively located on two sides of the base portion 31 in the second direction Y. The second direction Y is perpendicular to the first direction X.

[0325] In some embodiments, the first extending portion 331 is fixed to the first fixing portion 111 .

[0326] In some embodiments, the second extending portion 332 is fixed to the second fixing portion 121 .

[0327] In some embodiments, fixing includes but is not limited to abutting, bonding, welding, fastener locking and fixing, snap connection, etc.

[0328] In some embodiments, the first extending portion 331 is fixed to the first fixing portion 111 , and the second extending portion 332 is fixed to the second fixing portion 121 .

[0329] In some embodiments, along the first direction X, a portion of the projection of the first extending portion 331 is separated from a portion of the projection of the first fixing portion 111 , which is beneficial to the deformation of the first extending portion 331 .

[0330] In some embodiments, along the first direction X, a portion of the projection of the second extending portion 332 is separated from a portion of the projection of the first fixing portion 111 , which is beneficial to the deformation of the second extending portion 332 .

[0331] In some embodiments, along the first direction X, a portion of the projection of the first extending portion 331 is separated from a projection of the first fixing portion 111 , and a portion of the projection of the second extending portion 332 is separated from a projection of the first fixing portion 111 .

[0332] In some embodiments, along the first direction X, the projection of the first extension portion 331 is separated from the projection of the main body portion 211 , which is beneficial to the deformation of the first extension portion 331 .

[0333] In some embodiments, along the first direction X, the projection of the second extension portion 332 is separated from the projection of the main body portion 211 , which is beneficial to the deformation of the second extension portion 332 .

[0334] In some embodiments, along the first direction X, a projection of the first extending portion 331 is separated from a projection of the main portion 211 , and a projection of the second extending portion 332 is separated from a projection of the main portion 211 .

[0335] Referring to Figures 22 and 23, in some embodiments, the first connecting portion 33a connects the first extending portion 331 and the second extending portion 332. The first extending portion 331 connects to one side of the first connecting portion 33a. The second extending portion 332 connects to the other side of the first connecting portion 33a. Optionally, the first extending portion 331 extends beyond the base portion 31 in a direction opposite to the second direction Y, and the second extending portion 332 extends beyond the base portion 31 in the second direction Y.

[0336] 24 , in some embodiments, the second connecting portion 33b connects the first extending portion 331 and the second extending portion 332 . Optionally, the first extending portion 331 extends beyond the base portion 31 in a direction opposite to the second direction Y. In the second direction Y, the second extending portion 332 extends beyond the base portion 31 .

[0337] 25 , in some embodiments, the first extension portion 331 is connected to the first connection portion 33a and extends beyond the base portion 31 in a direction opposite to the second direction Y. The second extension portion 332 is connected to the second connection portion 33b and extends beyond the base portion 31 in the second direction Y.

[0338] 26 , in some embodiments, the first extension portion 331 is connected to the first connection portion 33a and extends beyond the base portion 31 along the second direction Y. The second extension portion 332 is connected to the second connection portion 33b and extends beyond the base portion 31 along a direction opposite to the second direction Y.

[0339] In some embodiments, the first extending portion 331 is fixed to the first fixing portion 111 . Optionally, the first extending portion 331 abuts against the first fixing portion 111 .

[0340] In some embodiments, the second extending portion 332 is fixed to the second fixing portion 121 . Optionally, the second extending portion 332 abuts against the second fixing portion 121 .

[0341] In some embodiments, the first extending portion 331 is fixed to the first fixing portion 111 , and the second extending portion 332 is fixed to the second fixing portion 121 .

[0342] 21 and 22 , in some embodiments, the connecting portion 33 includes a third extending portion 333 , which extends beyond the base portion 31 in a direction opposite to the second direction Y. The third extending portion 333 is connected to the first fixing portion 111 .

[0343] Referring to FIG. 21 and FIG. 22 , in some embodiments, the connecting portion 33 includes a fourth extending portion 334 . Along the second direction Y, the fourth extending portion 334 extends beyond the base portion 31 . The fourth extending portion 334 is connected to the second fixing portion 121 .

[0344] Referring to FIG. 21 and FIG. 22 , in some embodiments, the connecting portion 33 includes a third extending portion 333 and a fourth extending portion 334 , and the second connecting portion 33 b connects the third extending portion 333 and the fourth extending portion 334 .

[0345] In some embodiments, the third extending portion 333 is connected to the first fixing portion 111 , and the fourth extending portion 334 is connected to the second fixing portion 121 .

[0346] Referring to FIG. 21 and FIG. 22 , in some embodiments, viewed along the first direction X, in the second direction Y, the third extending portion 333 and the fourth extending portion 334 are respectively located on two sides of the base portion 31 .

[0347] In some embodiments, the third extending portion 333 is fixed to the first fixing portion 111 . Optionally, the third extending portion 333 abuts against the first fixing portion 111 .

[0348] In some embodiments, along the first direction X, a portion of the projection of the third extending portion 333 is separated from a portion of the projection of the first fixing portion 111 , which is beneficial to the deformation of the third extending portion 333 .

[0349] In some embodiments, the fourth extending portion 334 is fixed to the second fixing portion 121 . Optionally, the fourth extending portion 334 abuts against the second fixing portion 121 .

[0350] In some embodiments, along the first direction X, a portion of the projection of the fourth extending portion 334 is separated from a portion of the projection of the second fixing portion 121 , which is beneficial to the deformation of the fourth extending portion 334 .

[0351] In some embodiments, along the first direction X, a portion of the projection of the third extending portion 333 is separated from a projection of the first fixing portion 111 , and a portion of the projection of the fourth extending portion 334 is separated from a projection of the second fixing portion 121 .

[0352] In some embodiments, the third extending portion 333 is fixed to the first fixing portion 111 , and the fourth extending portion 334 is fixed to the second fixing portion 121 .

[0353] 13 and 14 , the first fixing portion 111 extends along the third direction Z, and the second extending portion 332 and the fourth extending portion 334 both abut against the first fixing portion 111. In other embodiments, the first fixing portion 111 may be divided into two separated portions along the third direction Z, with the second extending portion 332 abutting against one portion and the fourth extending portion 334 abutting against the other portion.

[0354] 13 and 14 , the second fixing portion 121 extends along the third direction Z, and the first extension portion 331 and the third extension portion 333 both abut against the second fixing portion 121. In other embodiments, the second fixing portion 121 may be divided into two separated portions along the third direction Z, with the first extension portion 331 abutting against one portion and the third extension portion 333 abutting against the other portion.

[0355] As shown in Figures 29 to 32, in some embodiments, the first extension portion 331 and the second extension portion 332 are configured to bend away from the battery cell assembly 20 in a direction opposite to the first direction X. When the battery cell assembly 20 expands, the buffer portion 32 is compressed to its limit. The first extension portion 331 and the second extension portion 332 bend, thereby providing further expansion space for the battery cell assembly 20 and reducing the impact on the battery cell assembly 20.

[0356] In some embodiments, the third extension portion 333 and the fourth extension portion 334 are configured to bend away from the battery cell assembly 20 in a direction opposite to the first direction X. When the battery cell assembly 20 expands, the buffer portion 32 is compressed to its limit. By bending the third extension portion 333 and the fourth extension portion 334, further expansion space can be provided for the battery cell assembly 20, thereby reducing the impact on the battery cell assembly 20.

[0357] Referring to Figures 13 and 14 , in some embodiments, a third fixing portion 131 is provided on the bottom wall 13. Along the first direction X, the projection of the third fixing portion 131 overlaps with the projection of the second connecting portion 33b. The second connecting portion 33b is fixed to the third fixing portion 131 to transfer forces acting on the buffer portion 32 to the housing 10. Optionally, the second connecting portion 33b abuts the third fixing portion 131.

[0358] In some embodiments, the second connecting portion 33b is fixed to the first fixing portion 111, the second fixing portion 121, and the third fixing portion 131. The second buffer portion 322 abuts against the housing 10 via the second connecting portion 33b, and can transfer the force applied to the buffer portion 322 to the housing 10.

[0359] In some embodiments, a fourth fixing portion 141 is provided on the top wall 14. Along the first direction X, the projection of the fourth fixing portion 141 overlaps with the projection of the first connecting portion 33a. The first connecting portion 33a is fixed to the fourth fixing portion 141. This can transfer forces acting on the buffer portion 32 to the housing 10. Optionally, the first connecting portion 33a abuts the fourth fixing portion 141.

[0360] In some embodiments, the first connecting portion 33a is fixed to the first fixing portion 111, the second fixing portion 121 and the fourth fixing portion 141, and the first buffer portion 321 abuts against the shell 10 through the first connecting portion 33a, so that the force acting on the buffer portion 32 can be transferred to the shell 10, and the elastic member 30 is connected to the shell 10 on both sides along the second direction Y and on both sides along the third direction Z, which further facilitates the elastic member 30 to be uniformly stressed and deformed.

[0361] In some embodiments, the buffer portion 32 includes a first buffer portion 321 connecting the base portion 31 and the first connection portion 33 a.

[0362] Please refer to FIG. 20 . In some embodiments, when viewed along the second direction Y, the first connecting portion 33 a extends beyond the first buffer portion 321 along the third direction Z, which facilitates deformation of the first buffer portion 321 .

[0363] In some embodiments, the first buffer portion 321 is configured to provide expansion space for the battery cell 21 .

[0364] Referring to FIG. 16 to FIG. 21 , in some embodiments, the first buffer portion 321 includes a first section 321 a and a second section 321 b . The first section 321 a is connected to the base portion 31 , and the second section 321 b is connected to the first section 321 a and the first connecting portion 33 a .

[0365] In some embodiments, the first section 321 a and the base portion 31 form an angle A1 , and the second section 321 b and the first connecting portion 33 a form an angle B1 .

[0366] In some embodiments, the angle A1 and the angle B1 are the same, which is beneficial for the elastic member 30 to be uniformly stressed and deformed.

[0367] In some embodiments, the second section 321b includes a first segment 3211 and at least one second segment 3212. The first segment 3211 connects the first segment 321a and the first connecting portion 33a. The second segment 3212 connects the first extension portion 331 and / or the second extension portion 332. In the second direction Y, the second segment 3212 is located on one side of the first segment 3211. The second segment 3212 can increase the strength of the elastic member 30.

[0368] In some embodiments, in the second direction Y, the second segment 3212 extends beyond the base 31 .

[0369] In some embodiments, the second section 321 b includes a second subsection 3212 , and the second subsection 3212 is connected to the first extension portion 331 .

[0370] In some embodiments, the second section 321 b includes a second sub-segment 3212 connected to the second extension portion 332 .

[0371] In some embodiments, the second section 321 b includes two second segments 3212 , wherein one second segment 3212 is connected to the first extension portion 331 , and the other second segment 3212 is connected to the second extension portion 332 .

[0372] In some embodiments, the length w2 of the second segment 3212 is less than the length w1 of the first segment 3211 . By reducing the length of the second segment 3212 , the strength of the elastic member 30 can be increased while facilitating the bending of the first extension portion 331 and the second extension portion 332 .

[0373] In some embodiments, referring to FIG. 18 , along the third direction Z, the length of the projection of the first segment 3211 in the first direction X is D1, and the length of the projection of the second segment 3212 in the first direction X is D2. D1 is greater than D2, which is beneficial for providing pressure to the battery cell assembly 20.

[0374] In some embodiments, the buffer portion 32 includes a second buffer portion 322 connecting the base portion 31 and the second connecting portion 33 b . The second buffer portion 322 is configured to provide expansion space for the battery cell assembly 20 .

[0375] In some embodiments, the buffer portion 32 includes a first buffer portion 321 and a second buffer portion 322 , and the first buffer portion 321 is disposed opposite to the second buffer portion 322 along the third direction Z.

[0376] In some embodiments, the second buffer portion 322 includes a third section 322a and a fourth section 322b. The third section 322a is connected to the base portion 31, and the fourth section 322b is connected to the third section 322a and the second connection portion 33b.

[0377] In some embodiments, the third section 322a and the base portion 31 form an angle A2, and the fourth section 322b and the second connecting portion 33b form an angle B2.

[0378] In some embodiments, the angle A2 and the angle B2 are the same, which is beneficial for the elastic member 30 to be uniformly stressed and deformed.

[0379] In some embodiments, the fourth segment 322b includes a third segment 3221 and at least one fourth segment 3222. The third segment 3221 connects the third segment 322a and the second connecting portion 33b. The fourth segment 3222 connects the third extension 333 and / or the fourth extension 334. In the second direction Y, the fourth segment 3222 is located on one side of the third segment 3221. The fourth segment 3222 can increase the strength of the elastic member 30.

[0380] In some embodiments, the fourth section 322 b includes a fourth sub-segment 3222 , and the fourth sub-segment 3222 is connected to the third extension portion 333 .

[0381] In some embodiments, the fourth section 322 b includes a fourth sub-segment 3222 , and the fourth sub-segment 3222 is connected to the fourth extension portion 334 .

[0382] In some embodiments, the fourth section 322 b includes two fourth segments 3222 , wherein one fourth segment 3222 is connected to the third extension portion 333 , and the other fourth segment 3222 is connected to the third extension portion 333 and the fourth extension portion 334 .

[0383] In some embodiments, in the second direction Y, the fourth segment 3222 extends beyond the base 31 .

[0384] In some embodiments, the length w4 of the fourth segment 3222 is less than the length w3 of the third segment 3221 . By reducing the length of the fourth segment 3222 , the strength of the elastic member 30 can be increased while facilitating the bending of the third extension portion 333 and the fourth extension portion 334 .

[0385] In some embodiments, along the third direction Z, refer to Figure 19, the length of the projection of the third segment 3221 in the first direction X is D3, and the length of the projection of the fourth segment 3222 in the first direction X is D4. D3 is greater than D4, which is beneficial to provide pressure on the battery cell assembly 20.

[0386] Please refer to FIG. 20 . In some embodiments, when viewed along the second direction Y, which is opposite to the third direction Z, the second connecting portion 33 b extends beyond the second buffer portion 322 , which facilitates deformation of the second buffer portion 322 .

[0387] In some embodiments, the connecting portion 33 has a flange 33c formed by folding the connecting portion 33 along one side of the buffer portion 32 in the third direction Z. Along the first direction X, the flange 33c is located between the connecting portion 33 and the base 31. The flange 33c can reduce the risk of the connecting portion 33 cutting the first conductive member 40 and the second conductive member 50.

[0388] In some embodiments, along the first direction X, the projection of the flange 33 c is separated from the projection of the buffer portion 32 , thereby reducing the impact on the deformation area of ​​the buffer portion 32 .

[0389] Referring to Figure 4 , in some embodiments, the battery module 100 includes a sampling member 70 connected to each battery cell 21. The sampling member 70 is connected to the circuit board 60 to transmit the collected electrical signals from the battery cells 21 to the circuit board 60. Optionally, the electrode terminals 21c of adjacent battery cells 21 are stacked, and the sampling member 70 is connected to at least one of the stacked electrode terminals 21c. Optionally, the electrical signal includes information such as current, voltage, resistance, and temperature. The sampling member 70 is welded to the electrode terminals 21c, including but not limited to laser welding and ultrasonic welding.

[0390] In some embodiments, the battery module 100 includes a wire 103 , and the detection component is connected to the sampling component 70 via the wire 103 .

[0391] 1 and 2 , an embodiment of the present application provides a battery pack 200 , including a front cover 16 and a battery module 100 according to any of the above embodiments. The front cover 16 is connected to the housing 10 .

[0392] In some embodiments, the front cover 16 is detachably connected to the battery module 100 and closes the first opening 10 b to facilitate maintenance of the battery pack 200 .

[0393] In some embodiments, the front cover 16 is detachably connected to the housing 10 .

[0394] Optionally, the front cover 16 connects the first side wall 11 , the second side wall 12 , the bottom wall 13 and the top wall 14 , and closes the first opening 10 b .

[0395] In some embodiments, the front cover 16 is detachably connected to the elastic member 30 .

[0396] In some embodiments, the front cover 16 defines a second space 161, and the battery pack 200 includes a circuit board 60 disposed within the second space 161. The circuit board 60 is connected to the battery cell assembly 20. Optionally, the first conductive member 40 is connected to the circuit board 60. Optionally, the sampling member 70 is connected to the circuit board 60.

[0397] Optionally, the circuit board 60 includes a BMS component (Battery Management System), which includes multiple electronic components. The multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0398] Optionally, the circuit board 60 includes a flexible printed circuit (FPC). Optionally, the circuit board 60 includes a printed circuit board (PCB).

[0399] In some embodiments, the battery pack 200 includes a first connection end 200a and a second connection end 200b, wherein the first connection end 200a and the second connection end 200b are connected to the front cover 16. One of the first connection end 200a and the second connection end 200b is connected to the circuit board 60, and the other is connected to the first conductive member 40. The first connection end 200a and the second connection end 200b protrude from the side of the front cover 16 facing away from the battery cell assembly 20 for connection to external devices.

[0400] Referring to FIG. 34 , the present application further provides an electrical device 300 employing at least one of the aforementioned battery packs 200. In one embodiment, the electrical device 300 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.

[0401] 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, comprising: a housing; a battery cell assembly disposed within the housing; an elastic member disposed within the housing, the elastic member and the battery cell assembly being arranged along a first direction, the elastic member including a base portion, a buffer portion, and a connecting portion, the base portion connecting the battery cell assembly, and the buffer portion connecting the connecting portion and the base portion; the housing includes a first fixing portion and a second fixing portion; in a second direction, the connecting portion includes a first extension portion and a second extension portion that extend beyond the base portion, the first extension portion being connected to the first fixing portion, and the second extension portion being connected to the second fixing portion; when viewed along the first direction, in the second direction, the first extension portion and the second extension portion are respectively located on both sides of the base portion, and the first direction is perpendicular to the second direction.

2. The battery module according to claim 1, characterized in that, the connecting portion includes a first connecting portion that connects the first extension portion and the second extension portion.

3. The battery module according to claim 2, characterized in that, the connecting portion includes a second connecting portion, the first connecting portion and the second connecting portion are arranged along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other in pairs; the second connecting portion is connected to the housing.

4. The battery module according to claim 3, characterized in that, the connecting portion includes a third extension portion and a fourth extension portion, the second connecting portion connects the third extension portion and the fourth extension portion, the third extension portion is connected to the first fixing portion, and the fourth extension portion is connected to the second fixing portion; when viewed along the first direction, in the second direction, the third extension portion and the fourth extension portion are respectively located on both sides of the base portion.

5. The battery module according to claim 4, characterized in that, along the first direction, a part of the projection of the third extension portion is separated from the projection of the first fixing portion; and / or, along the first direction, a part of the projection of the fourth extension portion is separated from the projection of the second fixing portion.

6. The battery module according to claim 5, characterized in that, the third extension portion is fixed to the first fixing portion; and / or, the fourth extension portion is fixed to the second fixing portion.

7. The battery module according to any one of claims 1 to 6, characterized in that, along the first direction, a part of the projection of the first extension portion is separated from the projection of the first fixing portion; and / or, along the first direction, a part of the projection of the second extension portion is separated from the projection of the second fixing portion.

8. The battery module according to claim 7, characterized in that, the first extension portion is fixed to the first fixing portion; and / or, the second extension portion is fixed to the second fixing portion.

9. The battery module according to any one of claims 2 - 8, characterized in that, the housing includes a first side wall and a second side wall that are oppositely arranged along the second direction; along the second direction, the distance h1 between the connecting portion and the first side wall is less than the distance h2 between the battery cell assembly and the first side wall; And / or, along the second direction, the distance h3 between the connecting portion and the second side wall is less than the distance h4 between the battery cell assembly and the second side wall.

10. The battery module according to any one of claims 4 to 6, wherein, the buffer portion includes a first buffer portion, and the first buffer portion connects the first connecting portion and the base; the first buffer portion includes a first section and a second section, the first section connects to the base, the second section includes a first sub-section and at least one second sub-section, the first sub-section connects the first section and the first connecting portion, and the second sub-section connects the first extension portion and / or the second extension portion; in the second direction, the second sub-section is disposed on one side of the first sub-section.

11. The battery module according to claim 10, wherein, along the third direction, the length of the projection of the first sub-section in the first direction is D1, and the length of the projection of the second sub-section in the first direction is D2, and D1 is greater than D2.

12. The battery module according to claim 10 or 11, wherein, the buffer portion includes a second buffer portion, and along the third direction, the first buffer portion and the second buffer portion are oppositely arranged; the second buffer portion connects the second connecting portion and the base.

13. The battery module according to claim 12, wherein, the second buffer portion includes a third section and a fourth section, the third section connects to the base, the fourth section includes a third sub-section and at least one fourth sub-section, the third sub-section connects the third section and the second connecting portion, and the fourth sub-section connects the third extension portion and / or the fourth extension portion; in the second direction, the fourth sub-section is disposed on one side of the third sub-section.

14. The battery module according to claim 13, wherein, along the direction opposite to the third direction, the length of the projection of the third sub-section in the first direction is D3, and the length of the projection of the fourth sub-section in the first direction is D4, and D3 is greater than D4.

15. The battery module according to claim 12 or 13, wherein, when observed along the second direction, along the direction opposite to the third direction, the second connecting portion extends beyond the second buffer portion.

16. The battery module according to any one of claims 1 to 15, wherein, along the second direction, there is a first gap between the base and the housing; the battery module includes a first conductive member, and the first conductive member connects the battery cell assembly and passes through the first gap.

17. The battery module according to any one of claims 1 to 16, wherein, along the second direction, there is a second gap between the base and the housing; the battery module includes a second conductive member, and the second conductive member connects the battery cell assembly and passes through the second gap.

18. The battery module according to claim 9, wherein, the housing includes a bottom wall, and the bottom wall connects the first side wall and the second side wall; The bottom wall is provided with a third fixing portion, and the third fixing portion is fixed to the second connecting portion. Along the first direction, the projection of the third fixing portion overlaps with the projection of the second connecting portion.

19. The battery module according to claim 18, wherein, the housing includes a top wall, the top wall and the bottom wall are arranged along the third direction, and the top wall connects the first side wall and the second side wall; the top wall is provided with a fourth fixing portion, and the fourth fixing portion is fixed to the first connecting portion. Along the first direction, the projection of the fourth fixing portion overlaps with the projection of the first connecting portion.

20. The battery module according to any one of claims 1 to 19, wherein, the housing includes a rear wall. Along the first direction, the battery cell assembly is located between the elastic member and the rear wall, and the stiffness of the elastic member is less than the stiffness of the rear wall.

21. The battery module according to any one of claims 3 to 6, wherein, the housing includes a bottom wall and a top wall, and the top wall and the bottom wall are arranged along the third direction; the battery module includes a first insulating sheet, and the first insulating sheet is disposed between the bottom wall and the battery cell assembly.

22. The battery module according to claim 21, wherein, the battery cell assembly includes a plurality of battery cell units, the battery cell units are connected to the first insulating sheet, and the battery cell units are configured such that when the battery cells expand, the battery cell units move on the first insulating sheet along a direction opposite to the first direction; the buffer portion is configured to provide an expansion space for the battery cells.

23. The battery module according to claim 22, wherein, the battery cell unit includes a battery cell, the battery cell includes a battery cell housing, an electrode assembly, and an electrode terminal. The battery cell housing includes a main body portion, the electrode assembly is disposed in the main body portion, and the electrode terminal is connected to the electrode assembly and extends out of the battery cell housing; along the first direction, the projection of the main body portion is located within the projection of the base portion.

24. The battery module according to claim 23, wherein, the projection of the first extension portion and the projection of the main body portion are separated from each other; and / or, the projection of the second extension portion and the projection of the main body portion are separated from each other.

25. The battery module according to claim 23 or 24, wherein, the top wall is provided with two second limiting members, and the two second limiting members are arranged along the second direction; the main body portion of each battery cell unit is disposed between the two second limiting members; and / or, the bottom wall is provided with two first limiting members, the two first limiting members are arranged along the second direction, and the main body portion of each battery cell unit is disposed between the two first limiting members.

26. The battery module according to any one of claims 22 to 25, wherein, the battery cell unit includes a bracket, and the bracket covers a part of the battery cell housing; the bracket is configured such that when the battery cells expand, the bracket moves on the first insulating sheet along a direction opposite to the first direction.

27. The battery module according to any one of claims 23 to 26, wherein, The battery cell housing includes a sealing portion, the sealing portion is connected to the main body portion, and the electrode terminal extends out of the battery cell housing from the sealing portion; The bracket covers at least a part of the main body portion and at least a part of the sealing portion.

28. The battery module according to claim 1, wherein, The connecting portion includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are arranged along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other in pairs; The first extension portion connects the first connecting portion, and the second extension portion connects the second connecting portion.

29. A battery pack, comprising the battery module according to any one of claims 1 to 28 and a front cover, the front cover is connected to the housing.

30. The battery pack according to claim 29, wherein, The front cover is provided with a second space; The battery pack includes a circuit board, the circuit board is disposed in the second space, and the circuit board is connected to the battery cell assembly.

31. The battery pack according to claim 29 or 30, wherein, The housing is provided with a first opening, the front cover is detachably connected to the battery module and closes the first opening.

32. The battery pack according to any one of claims 29 to 31, wherein, The front cover is detachably connected to the housing.

33. An electrical device, wherein, Comprises at least one battery pack according to any one of claims 29 to 32.

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