Battery pack and power consumption unit

Abstract

To provide a battery pack capable of reducing the entry of foreign matters such as dust into the battery pack through gaps in the battery pack.SOLUTION: A battery pack includes a case, a cell assembly, a front cover, and an elastic member. The cell assembly is disposed in the case. The front cover is connected to the case. The elastic member and the cell assembly are arranged along a first direction. Along the first direction, the case is connected to one side of the elastic member, and the cell assembly is connected to another side of the elastic member. The case includes a bottom wall, and the cell assembly is mounted on the bottom wall. The bottom wall is provided with a first extension portion. The front cover is provided with a first connecting wall. The first extension portion is connected to the first connecting wall. The elastic member abuts against the first extension portion. The elastic member abuts against the first extension portion, so that a force exerted by the elastic member causes the bottom wall to move closer to the first connecting wall, shielding a gap between the bottom wall and the first connecting wall.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This application relates to the field of energy storage technology, and in particular to battery packs and power consuming devices. [Background technology]

[0002] Currently, battery packs are widely used in fields such as drones, electric vehicles, smart energy storage devices, etc. Due to the gaps in the battery pack, dust and other foreign objects can easily get in, which affects the use of the battery pack. Summary of the Invention

[0003] In view of this, it is necessary to provide a battery pack and a power consuming device that can reduce the gap and reduce the intrusion of foreign matter such as dust into the battery pack.

[0004] An embodiment of the present application provides a battery pack including a case, a cell assembly, a front cover, and an elastic member. The cell assembly is disposed in the case. The front cover is connected to the case. The elastic member and the cell assembly are arranged along a first direction. Along the first direction, the case is connected to one side of the elastic member, and the cell assembly is connected to the other side. The case includes a bottom wall, and the cell assembly is placed on the bottom wall. A first extension portion is provided on the bottom wall, a first connection wall is provided on the front cover, the first extension portion is connected to the first connection wall, and the elastic member is abutted against the first extension portion. In the present application, the elastic member abuts against the first extension portion, so that the biasing force of the elastic member brings the bottom wall closer to the first connection wall, reducing the gap between the bottom wall and the first connection wall, reducing the intrusion of foreign matter such as dust into the battery pack, and reducing the impact of foreign matter such as dust on the use of the battery pack.

[0005] In one or more possible embodiments, the first extension portion includes a first extension connection portion and a first bent portion. The first extension connection portion is connected to the first connection wall. The elastic member is abutted against the first bent portion. This is advantageous for increasing the connection strength between the elastic member and the case and reducing the gap between the bottom wall and the first connection wall.

[0006] In one or more possible embodiments, the case includes a top wall. The top wall and the bottom wall are aligned along the second direction, the top wall has a second extension, and the elastic member is abutted against the second extension. The front cover has a second connecting wall, and the second extension is connected to the second connecting wall. The first direction is perpendicular to the second direction.

[0007] In one or more possible embodiments, the second extending portion includes a second extending connecting portion and a second folding portion. The second extending connecting portion is connected to the second connecting wall, and the elastic member is abutted against the second folding portion. This is advantageous for increasing the connection strength between the elastic member and the case and reducing the gap between the top wall and the second connecting wall.

[0008] In one or more possible embodiments, the elastic member includes a base, a buffer portion, and a connector portion, the base portion being connected to the cell assembly, the buffer portion connecting the connector portion to the base, and the connector portion being fixed to the case.

[0009] In one or more possible embodiments, the bumper includes a first bumper, the first bumper connected to one side of the base.

[0010] In one or more possible embodiments, the buffer portion includes a first buffer portion and a second buffer portion, the first buffer portion and the second buffer portion are arranged opposite each other along the second direction, the first buffer portion is connected to one side of the base, and the second buffer portion is connected to the other side of the base.

[0011] In one or more possible embodiments, the connection portion includes a first connection portion, the elastic member includes a third bent portion, and the third bent portion is abutted against the second bent portion, which is advantageous for increasing the connection strength between the elastic member and the case, and for applying pressure from the elastic member to the top wall, bringing the top wall closer to the second connection wall, and for reducing the gap between the top wall and the second connection wall.

[0012] In one or more possible embodiments, the connection portion includes a second connection portion, and the first connection portion and the second connection portion are disposed opposite to each other along the second direction. The elastic member includes a fourth bent portion, and the fourth bent portion is abutted against the first bent portion. This is advantageous for increasing the connection strength between the elastic member and the case, and for applying pressure from the elastic member to the bottom wall, bringing the bottom wall closer to the first connection wall, and for reducing the gap between the bottom wall and the first connection wall.

[0013] In one or more possible embodiments, a first fixing part is provided on the bottom wall, and the second connecting part is fixed to the first fixing part. Along the first direction, there is an overlapping portion between the projection of the first fixing part and the projection of the second connecting part.

[0014] In one or more possible embodiments, a second fixing part is provided on the top wall, and the first connecting part is fixed to the second fixing part. Along the first direction, there is an overlapping portion between the projection of the second fixing part and the projection of the first connecting part.

[0015] In one or more possible embodiments, the case includes a first side wall, the first side wall connects the bottom wall and the top wall, and the first side wall is fixedly connected to the front cover. A third fixing part is installed on the first side wall, and the first connecting part and the second connecting part are fixed to the third fixing part. This is advantageous for the elastic member to receive the force uniformly and to be deformed uniformly.

[0016] In one or more possible embodiments, the case includes a second side wall, and the front cover is fixedly connected to the second side wall. The second side wall connects the top wall and the bottom wall, and a fourth fixing part is installed on the second side wall, and the first connecting part and the second connecting part are fixed to the fourth fixing part. This is advantageous for the elastic member to receive the force uniformly and to be deformed uniformly.

[0017] In one or more possible embodiments, the first extension and the second extension are located within the front cover, and the front cover acts as a position limiter for the second extension and the first extension, which is advantageous for connecting the front cover to the case.

[0018] In one or more possible embodiments, the first extension portion and the first fixing portion are arranged along the third direction, and the first fixing portion is disposed between adjacent first extension portions, which is advantageous for blocking gaps and for the elastic member to receive a force uniformly and to be deformed uniformly.

[0019] In one or more possible embodiments, the second extension portion and the second fixing portion are arranged along the third direction, and the second fixing portion is disposed between adjacent second extension portions, which is advantageous for blocking gaps and for the elastic member to receive a force uniformly and to be deformed uniformly.

[0020] In one or more possible embodiments, the case includes a rear wall, the rear wall connects the top wall and the bottom wall, and along a first direction, the 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. When the cell assembly expands, the elastic member deforms before the rear wall, and the elastic member provides an expansion space for the cell assembly.

[0021] In one or more possible embodiments, the cell assembly includes a cell unit, the cell unit includes a cell, the cell includes a cell case, an electrode assembly and an electrode terminal, the cell case includes a body, the electrode assembly is disposed in the body, and the electrode terminal is connected to the electrode assembly and protrudes into the cell case. Two first position limiting parts are provided on the top wall, and the two first position limiting parts are arranged along the third direction. The body part of each cell unit is disposed between the two first position limiting parts. The two first position limiting parts guide the movement of the cell assembly.

[0022] In one or more possible embodiments, the bottom wall is provided with two first position limiting portions, and the two first position limiting portions are arranged along the third direction. The main body portion of each cell unit is provided between the two first position limiting portions. The two first position limiting portions guide the movement of the cell assembly.

[0023] In one or more possible embodiments, the battery pack includes a first cushioning member disposed between the base and the first cell unit, the first cushioning member having a hardness less than a hardness of the base, thereby reducing damage from the base to the first cell unit.

[0024] In one or more possible embodiments, the battery pack includes a second cushioning member disposed between the second cell unit and the rear wall, the second cushioning member having a hardness less than a hardness of the rear wall, thereby reducing damage caused by the rear wall to the second cell unit.

[0025] In one or more possible embodiments, the battery pack includes a first conductive member having a first gap between the base and the case along the second direction, one end of the first conductive member being connected to the cell assembly and the other end passing through the first gap.

[0026] In one or more possible embodiments, the first conductive member is arranged to be movable with the elastic member, reducing tension on the first conductive member and reducing the risk of the first conductive member tearing, improving the safety of the battery pack.

[0027] In one or more possible embodiments, the battery pack includes a second conductive member, with a second gap between the base and the case, and one end of the second conductive member connected to the cell assembly and the other end passing through the second gap.

[0028] In one or more possible embodiments, the second conductive member and the elastic member are spaced apart, which is advantageous in reducing tension on the second conductive member, reducing the risk of the second conductive member being torn, and improving the safety of the battery pack.

[0029] In one or more possible embodiments, the connection part is provided with a folded portion, and the folded portion is formed by folding back the side of the connection part that is away from the buffer part in the second direction. Along the first direction, the folded portion is located between the connection part and the base part. The folded portion can reduce the risk that the connection part cuts the wire harness.

[0030] In one or more possible embodiments, along the first direction, the projection of the fold and the projection of the buffer do not overlap, reducing the effect of the buffer on the deformation area.

[0031] An embodiment of the present application provides a power consuming device including the battery pack of any of the above embodiments. [Brief description of the drawings]

[0032] [Figure 1] FIG. 1 shows a schematic diagram of a battery pack according to some embodiments. [Diagram 2] FIG. 2 illustrates an exploded view of a battery pack according to some embodiments. [Diagram 3]FIG. 3 is a schematic diagram illustrating a portion of a battery pack according to some embodiments. [Figure 4] FIG. 4 is a schematic diagram illustrating a portion of a battery pack according to some embodiments. [Diagram 5] FIG. 5 is an enlarged schematic diagram showing a partial configuration of the battery pack in FIG. [Figure 6] FIG. 6 is an enlarged schematic diagram showing a partial configuration of the battery pack in FIG. [Figure 7] FIG. 7 is a schematic diagram showing the configuration of a part of a case and an elastic member in some embodiments. [Figure 8] FIG. 8 shows schematic diagrams of the configuration of elastic members in some embodiments. [Figure 9] FIG. 9 shows a schematic diagram of a top wall configuration in some embodiments. [Figure 10] FIG. 10 shows a schematic diagram of the top wall configuration from another viewing angle in some embodiments. [Figure 11] FIG. 11 shows an enlarged schematic view of a portion of the top wall in FIG. [Figure 12] FIG. 12 is a schematic diagram showing a configuration of a portion of a case in some embodiments. [Figure 13] FIG. 13 shows a schematic diagram of a bottom wall configuration in some embodiments. [Figure 14] FIG. 14 is an enlarged schematic view of a part of the case in FIG. [Figure 15] FIG. 15 is a schematic diagram illustrating a portion of a battery pack according to some embodiments. [Figure 16] FIG. 16 shows a schematic diagram of the configuration of the front cover and the circuit board in some embodiments. [Figure 17] FIG. 17 illustrates a schematic diagram of a circuit board in some embodiments. [Figure 18] FIG. 18 shows a schematic diagram of a circuit board from another viewing angle in some embodiments. [Figure 19] FIG. 19 shows a schematic diagram of a circuit board and a case according to some embodiments. [Figure 20]FIG. 20 illustrates a schematic diagram of a portion of a battery pack according to some embodiments. [Figure 21] FIG. 21 shows a schematic diagram of a cell according to some embodiments. [Figure 22] FIG. 22 shows an exploded schematic diagram of the cell in FIG. [Diagram 23] FIG. 23 shows a schematic diagram of a cell unit according to some embodiments. [Figure 24] FIG. 24 shows a schematic diagram of a cell unit from another viewing angle in some embodiments. [Diagram 25] FIG. 25 shows a schematic diagram of a cell unit from another viewing angle in some embodiments. [Figure 26] FIG. 26 shows a schematic diagram of a portion of a cell unit in some embodiments. [Figure 27] FIG. 27 shows a schematic diagram of a portion of a cell unit in some embodiments. [Figure 28] FIG. 28 shows a schematic diagram of a cell unit from another viewing angle in some embodiments. [Figure 29] FIG. 29 illustrates a schematic diagram of a power consuming device according to some embodiments. [Explanation of symbols]

[0033] 100: Battery pack 10: Case 10a: Case 10b: Front cover 101b: First connecting wall 102b: Second connecting wall 103b: 2nd hole 104b: 3rd connecting wall 105b: 4th connecting wall 11: Top wall 111:Second extension part 1111: 1st hole 112: Second folding section 113:Second extension connection 11a: Second fixed part 11b: second position limiting section 12: Bottom wall 121: 1st extension part 122: First bending part 123: 1st extension connection part 12a: 1st fixed part 12b: First position limiting section 13: First side wall 131: First fixing member 13a: Third fixed part 14: Second side wall 14a: 4th fixed part 141: Second fixing member 15: Back wall 16: Lid 20: Cell assembly 20a: Cell unit 201: First cell unit 202: Second cell unit 21: Cell 21a: Cell case 211: Main body 211c: 1st wall 211d: 2nd wall 2111: Case 1 2111a: First recess 2112: Case 2 2112a: Second recess 2113: First extension 2114: Second Extension 212: Sealing part 212a: First sealing part 2121: First sealing connection 2122: First sealing bend 212b: Second sealing part 21b: Electrode assembly 21c: Electrode terminal 22: Holder 22a: First holder 22b: Second holder 221: Part 1 222: First side 224: First side extension part 226:Second part 227: Convex 227a: Storage ditch 228:Notch 30: Elastic member 301: First gap 302: Second gap 31: Base 32:Buffer section 321: 1st buffer section 321a: First segment 321b: Second segment 322:Second buffer section 322a: Third segment 322b: 4th segment 33: Connection 331: First connection part 332: Second connection part 333: Folding part 34: Third fold 35: 4th fold 40: Circuit board 41: First element 50: First conductive member 60: second conductive member 70: Sampling material 101: Fastening member 102: First connection end 103: Second connection end 104: Wire 110: First insulating sheet 120: First cushioning member 130: Second cushioning member 200: Power consumption device X: 1st direction Y: Second direction Z: 3rd direction

[0034] The present application will be further described based on the following specific examples and with reference to the above drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] Hereinafter, the technical solutions in the embodiments of the present application will be described with reference to the drawings in the embodiments of the present application. Of course, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments.

[0036] It should be noted that when an element is said to be "connected" to another element, it may be directly connected to the other element, or there may be intervening elements between the two. When an element is said to be "mounted" or "disposed" on another element, it may be directly mounted on the other element, or there may be intervening elements between the two.

[0037] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the field of this application. In this specification, the terms used in this specification are merely for describing specific examples and are not intended to limit the present application. As used herein, the term "and / or" means any combination and all combinations of one or more of the related described objects.

[0038] Considering the factors of the tolerance of the actual processing, it should be understood that the term "perpendicular" in the technical solution of the present application is used to describe the ideal state between two parts. In the actual production or use state, the state between the two parts may be close to perpendicular. For example, referring to numerical values, perpendicular may refer to the angle range between two straight lines being 90°±10°, perpendicular may refer to the dihedral angle range of two planes being 90°±10°, and perpendicular may further refer to the angle range between a straight line and a plane being 90°±10°. The two parts described as "perpendicular" may not be absolute straight lines or planes, but may be approximately straight lines or planes, and from a macroscopic point of view, if the overall extension direction is straight or plane, it can be regarded as a "straight line" or a "plane".

[0039] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application pertains. In the present specification, the terms used herein are merely for the purpose of describing specific embodiments, and are not intended to limit the present application.

[0040] The terms "left", "right", "top", "bottom", "front", "rear" and similar designations used herein are for illustrative purposes only and are not limiting of the present application.

[0041] Unless otherwise noted, in this document, the term "plurality" when used to describe a quantity of parts specifically refers to the quantity of parts being two or more than two.

[0042] Being in the first direction X includes being along the first direction X and along the direction opposite to the first direction X, being in the second direction Y includes being along the second direction Y and along the direction opposite to the second direction Y, and being in the third direction Z includes being along the third direction Z and along the direction opposite to the third direction Z.

[0043] For convenience of explanation, some electrode terminals are not shown in a folded state in the drawings.

[0044] An embodiment of the present application provides a battery pack including a case, a cell assembly, a front cover, and an elastic member. The cell assembly is disposed in the case. The front cover is connected to the case. The elastic member and the cell assembly are arranged along a first direction. Along the first direction, the case is connected to one side of the elastic member, and the cell assembly is connected to the other side. The case includes a bottom wall, and the cell assembly is placed on the bottom wall. A first extension portion is provided on the bottom wall, a first connection wall is provided on the front cover, the first extension portion is connected to the first connection wall, and the elastic member is abutted against the first extension portion. In the present application, the elastic member abuts against the first extension portion, so that the biasing force of the elastic member brings the bottom wall closer to the first connection wall, reducing the gap between the bottom wall and the first connection wall, reducing the intrusion of foreign matter such as dust into the battery pack, and reducing the impact of foreign matter such as dust on the use of the battery pack.

[0045] Hereinafter, several embodiments of the present application will be described in detail with reference to the drawings. If there is no conflict, the following embodiments and features in the embodiments may be combined with each other.

[0046] Referring to Figures 1 and 2, one embodiment of the present application provides a battery pack 100 including a case 10a, a cell assembly 20, and a front cover 10b, where the cell assembly 20 is disposed within the case 10a and the front cover 10b is connected to the case 10a.

[0047] In some embodiments, the battery pack 100 includes an elastic member 30, and the elastic member 30 and the cell assembly 20 are arranged along a first direction X. Along the first direction X, the case 10a is connected to one side of the elastic member 30, and the cell assembly 20 is connected to the other side of the elastic member 30.

[0048] In some embodiments, a resilient member 30 is disposed within the case 10a, which is advantageous for removal and repair of the battery pack 100.

[0049] In some embodiments, the elastic member 30 is positioned to exert pressure on the cell assembly 20 and provide expansion space for the cell assembly 20 .

[0050] 2 to 16, in some embodiments, the case 10a includes a top wall 11, and the top wall 11 is connected to a front cover 10b.

[0051] In some embodiments, the case 10a includes a bottom wall 12 on which the cell assembly 20 is mounted. The top wall 11 and the bottom wall 12 are aligned along a second direction Y, and the first direction X is perpendicular to the second direction Y.

[0052] In some embodiments, a first extension 121 is provided on the bottom wall 12, and the first extension 121 is connected to the front cover 10b.

[0053] In some embodiments, the first extension 121 and the bottom wall 12 are integrally formed, for example, by injection molding, bending a metal plate, or pressing.

[0054] In some embodiments, the first extension 121 may be secured to the bottom wall 12 by other means, including but not limited to welding, adhesives, and the like.

[0055] In some embodiments, the first connecting wall 101b is provided on the front cover 10b, the first extending portion 121 is connected to the first connecting wall 101b, and the elastic member 30 is in contact with the first extending portion 121. In the present application, by having the elastic member 30 in contact with the first extending portion 121, the biasing force of the elastic member 30 brings the bottom wall 12 closer to the first connecting wall 101b, thereby reducing the gap between the bottom wall 12 and the first connecting wall 101b, reducing the intrusion of foreign matter such as dust into the battery pack 100, and reducing the impact of foreign matter such as dust on the use of the battery pack 100.

[0056] In some embodiments, the first extension portion 121 is connected to the inner surface of the first connection wall 101b, and this can block some of the gap, thereby further reducing the intrusion of foreign matter such as dust into the battery pack 100.

[0057] In some embodiments, the first extension 121 is directly connected to the inner surface of the first connecting wall 101b. The direct connection means that the first extension 121 and the first connecting wall 101b are directly connected to each other and are not connected to each other via any other components.

[0058] In some embodiments, the second extension portion 111 is provided on the top wall 11, the second connecting wall 102b is provided on the front cover 10b, the second extension portion 111 is connected to the second connecting wall 102b, and the elastic member 30 is in contact with the second extension portion 111. By having the elastic member 30 in contact with the second extension portion 111, the biasing force of the elastic member 30 brings the top wall 11 closer to the second connecting wall 102b, thereby reducing the gap between the top wall 11 and the second connecting wall 102b, thereby reducing the intrusion of foreign matter such as dust into the battery pack 100 and reducing the effect of the foreign matter such as dust on the use of the battery pack 100.

[0059] In some embodiments, the second extension 111 is fixed to the second connecting wall 102b. This further reduces the gap between the top wall 11 and the second connecting wall 102b, thereby reducing the intrusion of foreign matter such as dust into the battery pack 100.

[0060] In some embodiments, the second extension 111 and the top wall 11 are integrally formed, for example, by injection molding, bending a metal plate, or pressing.

[0061] In some embodiments, the second extension 111 may be secured to the top wall 11 by other means, including but not limited to welding, adhesives, and the like.

[0062] In some embodiments, the battery pack 100 includes a fastening member 101, the second extension 111 has a first hole 1111, the second connecting wall 102b has a second hole 103b, and the fastening member 101 is disposed in the first hole 1111 and the second hole 103b to fasten the second extension 111 to the second connecting wall 102b. Preferably, the fastening member 101 includes a screw.

[0063] In some embodiments, the second extending portion 111 is connected to the inner surface of the second connecting wall 102b, so that some of the gap can be blocked, and the intrusion of foreign matter such as dust into the battery pack 100 can be further reduced.

[0064] In some embodiments, the second extension 111 is fastened to the second connecting wall 102b by means of fastening, including but not limited to fastening with fastening members, welding, adhesion, and the like.

[0065] In some embodiments, the second extension portion 111 and the first extension portion 121 are located inside the front cover 10b. This allows the front cover 10b to act as a position limiter for the second extension portion 111 and the first extension portion 121. This is advantageous for the connection between the case 10a and the front cover 10b.

[0066] In some embodiments, the first extending portion 121 includes a first bent portion 122, which is connected to the bottom wall 12, and the elastic member 30 abuts against the first bent portion 122. This is advantageous for increasing the connection strength between the elastic member 30 and the case 10a and reducing the gap between the bottom wall 12 and the first connecting wall 101b.

[0067] In some embodiments, the first extension portion 121 includes a first extension connection portion 123, which is connected to the first bent portion 122, and the first extension connection portion 123 is connected to the first connection wall 101b.

[0068] In some embodiments, the first extending connection portion 123 and the first bent portion 122 are integrally formed.

[0069] In some embodiments, the second extension portion 111 includes a second bent portion 112, which is connected to the top wall 11, and the elastic member 30 abuts against the second bent portion 112. This is advantageous for increasing the connection strength between the elastic member 30 and the case 10a and reducing the gap between the top wall 11 and the second connecting wall 102b.

[0070] In some embodiments, the second extension portion 111 includes a second extension connection portion 113, which is connected to the second folded portion 112, and which is connected to the second connecting wall 102b.

[0071] In some embodiments, the second extending connection portion 113 and the second folded portion 112 are integrally formed.

[0072] In some embodiments, the length L1 of the first extending connection portion 123 is smaller than the length L2 of the second extending connection portion 113 along the first direction X. This is advantageous for the cell assembly 20 to protrude from the bottom wall 12 side, improving the safety of the battery pack 100. When the cell assembly 20 expands, the expansion force acts on the elastic member 30, and the expansion force acts on the case 10a through the elastic member 30. As time passes, the cell assembly 20 continues to expand, and the elastic member 30 is compressed to the limit and breaks through the bottom wall 12, cushioning the pressure of the cell assembly 20 and reducing the risk of explosion due to the pressure of the cell assembly 20.

[0073] In some embodiments, the strength of the top wall 11 is greater than the strength of the bottom wall 12. This is advantageous for the cell assemblies 20 to protrude from the bottom wall 12 side, which is advantageous for further improving the safety of the battery pack 100.

[0074] In some embodiments, a first fixing portion 12a is provided on the bottom wall 12, and along the first direction X, there is a portion where the projection of the first fixing portion 12a and the projection of the elastic member 30 overlap, and the elastic member 30 is fixed to the first fixing portion 12a.

[0075] In some embodiments, a plurality of first extensions 121 and a plurality of first fixing parts 12a are provided on the bottom wall 12, the first extensions 121 and the first fixing parts 12a are arranged along the third direction, and the first fixing parts 12a are disposed between the adjacent first extensions 121. This is advantageous for blocking gaps and for the elastic member 30 to receive a force uniformly and to be deformed uniformly. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0076] In some embodiments, a second fixing portion 11a is provided on the top wall 11, and along the first direction X, there is a portion where the projection of the second fixing portion 11a and the projection of the elastic member 30 overlap, and the elastic member 30 is fixed to the second fixing portion 11a.

[0077] In some embodiments, fastening may include, but is not limited to, friction bonding, adhesive bonding, welding, fastening with fasteners, snap-fit ​​connections, and the like.

[0078] In some embodiments, a plurality of second extension parts 111 and a plurality of second fixing parts 11a are provided on the top wall 11, the second extension parts 111 and the second fixing parts 11a are arranged along the third direction, and the second fixing parts 11a are disposed between adjacent second extension parts 111. This is advantageous for blocking gaps and for the elastic member 30 to receive a force uniformly and to be deformed uniformly.

[0079] In some embodiments, the second fixing portion 11a and the first fixing portion 12a are arranged along the second direction Y. This is advantageous for the elastic member 30 to receive the force uniformly and to be deformed uniformly.

[0080] In some embodiments, the case 10 a includes a first side wall 13 that connects the top wall 11 and the bottom wall 12 .

[0081] In some embodiments, a first fixing member 131 is provided on the first side wall 13, and the first fixing member 131 is fixedly connected to the front cover 10b.

[0082] In some embodiments, the front cover 10b includes a third connecting wall 104b, which connects the first connecting wall 101b and the second connecting wall 102b, and the fastening member 101 penetrates the third connecting wall 104b and the first fixing member 131, thereby fastening and connecting the first side wall 13 and the front cover 10b.

[0083] In some embodiments, along the second direction Y, one side of the first side wall 13 is fixedly connected to the top wall 11, and the other side is directly connected to the bottom wall 12. This is advantageous for the elastic member 30 to break through the bottom wall 12. Preferably, the first side wall 13 is fastened and connected to the front cover 10b and the top wall 11 by the fastening member 101.

[0084] In some embodiments, the case 10a includes a second side wall 14, which connects the top wall 11 and the bottom wall 12. The first side wall 13 and the second side wall 14 are aligned along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0085] In some embodiments, a second fixing member 141 is provided on the second side wall 14, and the second fixing member 141 is fixedly connected to the front cover 10b.

[0086] In some embodiments, the front cover 10b includes a fourth connecting wall 105b, the third connecting wall 104b and the fourth connecting wall 105b are arranged along the third direction Z, the fourth connecting wall 105b connects the first connecting wall 101b and the second connecting wall 102b, and the fastening member 101 penetrates the fourth connecting wall 105b and the second fixing member 141, thereby fastening and connecting the second side wall 14 and the front cover 10b.

[0087] In some embodiments, along the second direction Y, one side of the second side wall 14 is fixedly connected to the top wall 11, and the other side is directly connected to the bottom wall 12. This is advantageous for the elastic member 30 to break through the bottom wall 12. Preferably, the second side wall 14 is fastened and connected to the front cover 10b and the top wall 11 by the fastening member 101.

[0088] In some embodiments, a third fixed portion 13a is provided on the first side wall 13, and the elastic member 30 is fixed to the third fixed portion 13a. Preferably, the elastic member 30 is abutted against the third fixed portion 13a.

[0089] Along the first direction X, there is a portion where the projection of the third fixing portion 13a and the projection of the elastic member 30 overlap, and the third fixing portion 13a abuts against one side of the elastic member 30 that is away from the cell assembly 20.

[0090] In some embodiments, a fourth fixed portion 14a is provided on the second side wall 14, and the third fixed portion 13a and the fourth fixed portion 14a are arranged along the third direction Z. The elastic member 30 is fixed to the fourth fixed portion 14a. Preferably, the elastic member 30 abuts against the fourth fixed portion 14a.

[0091] Along the first direction X, there is a portion where the projection of the fourth fixing portion 14a and the projection of the elastic member 30 overlap, and the fourth fixing portion 14a abuts against one side of the elastic member 30 that is away from the cell assembly 20.

[0092] Both sides of the elastic member 30 along the second direction Y and both sides along the third direction Z are in contact with the case 10a by the second fixed portion 11a, the first fixed portion 12a, the third fixed portion 13a, and the fourth fixed portion 14a. This is advantageous for the elastic member 30 to receive the force uniformly and to be deformed uniformly.

[0093] In some embodiments, the case 10a includes a rear wall 15 that connects the top wall 11, the bottom wall 12, the first side wall 13, and the second side wall 14. Along the first direction X, the cell assembly 20 is located between the elastic member 30 and the rear wall 15.

[0094] In some embodiments, the stiffness of the elastic member 30 is greater than the stiffness of the rear wall 15, so that when the cell assembly 20 expands, the elastic member 30 deforms before the rear wall 15, and the elastic member 30 provides the cell assembly 20 with expansion space.

[0095] 15 to 19, in some embodiments, the battery pack 100 includes a circuit board 40, which is disposed within the front cover 10b. The circuit board 40 has a first element 41 disposed on a side facing the elastic member 30.

[0096] In some embodiments, first element 41 includes a fusible device.

[0097] In some embodiments, the fusing device may be a circuit breaker, and by way of example, the circuit breaker may be a fuse or a shorting device having a fuse structure.

[0098] It is understood that in some embodiments, the fuse may be disposed in a power circuit of the battery pack 100, and preferably, the power circuit of the battery pack 100 may include a discharge circuit for discharging the battery pack 100 to the outside, and may include a charge circuit for charging the battery pack 100.

[0099] 19 , in some embodiments, along the second direction Y, a distance from the first element 41 to the top wall 11 is L1, and a distance from the first element 41 to the bottom wall 12 is L2, where L1 is smaller than L2. By locating the first element 41 closer to the top wall 11, a risk of the first element 41 being damaged when the elastic member 30 breaks through the bottom wall 12 and when the cell assembly 20 protrudes from the bottom wall 12 can be reduced.

[0100] In some embodiments, when measuring L1 and L2, the measurement location on first element 41 is the highest point at which first element 41 protrudes from circuit board 40.

[0101] In some embodiments, the distance from the bottom wall 12 to the top wall 11 along the second direction Y is L0, and L1 is less than 1 / 4L0, further reducing the risk that the cell assembly 20 will contact the first element 41 and damage the first element 41.

[0102] In some embodiments, along the first direction X, the first element 41 protrudes further from the circuit board 40 than the other elements.

[0103] Preferably, the circuit board 40 includes a BMS assembly (Battery Management System), which includes a number of electronic elements that can realize functions such as control, protection, communication, power calculation, signal transmission, and electrical energy transmission for the cell assembly 20.

[0104] Preferably, the circuit board 40 comprises a flexible printed circuit board (FPC) or a printed circuit board (PCB).

[0105] 20 to 28, in some embodiments, the cell assembly 20 includes a plurality of cell units 20a, which are stacked and disposed along a first direction X. In the embodiment shown in FIG.

[0106] In some embodiments, the cell unit 20a includes a first cell unit 201 and a second cell unit 202, where the first cell unit 201 and the second cell unit 202 are located in the outermost cell units of the cell assembly 20, the first cell unit 201 is connected to the elastic member 30, and the second cell unit 202 is connected to the rear wall 15.

[0107] In some embodiments, the cell unit 20a includes a cell 21, which includes a cell casing 21a, an electrode assembly 21b and an electrode terminal 21c, the cell casing 21a includes a main body portion 211, the electrode assembly 21b is located within the main body portion 211, and the electrode terminal 21c is connected to the electrode assembly 21b and protrudes into the cell casing 21a.

[0108] In some embodiments, the cell unit 20a is connected to the bottom wall 12 and is arranged such that when the cell 21 expands, the cell unit 20a moves relative to the bottom wall 12 along a direction opposite to the first direction X.

[0109] In some embodiments, the cell unit 20a is connected to the bottom wall 12, and the cell unit 20a is arranged such that the cell unit 20a moves relative to the bottom wall 12 along the first direction X when the expansion of the cell 21 is reduced.

[0110] In some embodiments, the battery pack 100 includes a first insulating sheet 110 disposed between the bottom wall 12 and the cell assembly 20 to enhance insulation between the cell assembly 20 and the bottom wall 12 .

[0111] In some embodiments, the cell assembly 20 is connected to the first insulating sheet 110, for example, the cell assembly 20 is contact-connected to the first insulating sheet 110. The cell unit 20a is arranged such that the cell unit 20a moves on the first insulating sheet 110 along a direction opposite to the first direction X when the cell unit 20a expands.

[0112] In some embodiments, the cell assembly 20 is connected to the first insulating sheet 110, for example, the cell assembly 20 is contact-connected to the first insulating sheet 110. The cell unit 20a is arranged such that the cell unit 20a moves on the first insulating sheet 110 along the first direction X when the expansion of the cell 21 is reduced.

[0113] In some embodiments, the coefficient of friction between the cell unit 20a and the first insulating sheet 110 is smaller than the coefficient of friction between the cell unit 20a and the bottom wall 12. This is favorable for the movement of the cell unit 20a.

[0114] In some embodiments, the cell casing 21a includes a sealing portion 212, the sealing portion 212 is connected to the body portion 211, and the electrode terminal 21c protrudes from the sealing portion 212 into the cell casing 21a.

[0115] In some embodiments, the main body 211 includes a first case 2111 and a second case 2112, the first case 2111 has a first recess 2111a, and the second case 2112 has a second recess 2112a. The first case 2111 is connected to the second case 2112 to form a receiving space. A part of the electrode assembly 21b is disposed in the first recess 2111a, and a part of the electrode assembly 21b is disposed in the second recess 2112a. The peripheral side of the first case 2111 extends outward to form a first extended edge 2113, and the peripheral side of the second case 2112 extends outward to form a second extended edge 2114. The first case 2111 is connected to the second case 2112, and the first extended edge 2113 and the second extended edge 2114 are overlapped and sealed to form a sealing portion 212.

[0116] In some embodiments, the sealing portion 212 includes a first sealing portion 212a, and the electrode terminal 21c protrudes from the first sealing portion 212a to the cell casing 21a.

[0117] In some embodiments, the sealing portion 212 includes a second sealing portion 212b, where the second sealing portion 212b is connected to the first sealing portion 212a.

[0118] In some embodiments, the first extending edge 2113 and the second extending edge 2114 are overlapped, sealed and connected to form two first sealing portions 212a and two second sealing portions 212b. The two first sealing portions 212a are arranged along the third direction Z, and the two second sealing portions 212b are arranged along the second direction Y, in which one first sealing portion 212a is connected to the two second sealing portions 212b, and the other first sealing portion 212a is connected to the two second sealing portions 212b.

[0119] In some embodiments, the cell 21 includes two electrode terminals 21c, one of which protrudes from one of the two first sealing portions 212a into the cell casing 21a, and the other of which protrudes from the other of the two first sealing portions 212a into the cell casing 21a.

[0120] In some embodiments, the two electrode terminals 21c protrude from the same first sealing portion 212a into the cell casing 21a.

[0121] In one embodiment, adjacent body portions 211 are in contact with each other. This is advantageous for applying pressure to the body portions 211.

[0122] In one embodiment, adjacent cell casings 21a pressurize each other, so that the plurality of cell units 20a are in a pressurized state, which is advantageous for improving the service life of the cell units 20a.

[0123] In some embodiments, the first sealing portion 212a includes a first sealing connection portion 2121 and two first sealing fold portions 2122, and the first sealing connection portion 2121 is connected to the two first sealing fold portions 2122. The two first sealing fold portions 2122 are disposed opposite each other along the second direction Y. The electrode terminal 21c protrudes from the first sealing connection portion 2121 to the cell casing 21a.

[0124] In some embodiments, the cell casing 21a comprises an aluminum casing.

[0125] In some embodiments, the cells 21 include, but are not limited to, soft pack cells, rectangular cells, and square cells.

[0126] In some embodiments, each cell unit 20a further includes a holder 22, which covers at least a portion of the cell casing 21a.

[0127] In some embodiments, the holder 22 is arranged such that the holder 22 moves relative to the case 10a along a direction opposite to the first direction X when the cell 21 expands.

[0128] In some embodiments, the holder 22 is arranged such that the holder 22 moves relative to the case 10a along the first direction X when the expansion of the cell 21 is reduced.

[0129] In some embodiments, the holder 22 is connected to the bottom wall 12 and is arranged such that the holder 22 moves relative to the bottom wall 12 along a direction opposite to the first direction X when the cell 21 expands.

[0130] In some embodiments, the holder 22 is connected to the bottom wall 12 and is arranged such that the holder 22 moves relative to the bottom wall 12 along the first direction X when the cell 21 is de-expanded.

[0131] In some embodiments, the holder 22 is contact-connected to the first insulating sheet 110, and the holder 22 is arranged such that when the cell 21 expands, the holder 22 moves on the first insulating sheet 110 along a direction opposite to the first direction X.

[0132] In some embodiments, the holder 22 is contact-connected to the first insulating sheet 110, and the holder 22 is arranged such that the holder 22 moves on the first insulating sheet 110 along the first direction X when the expansion of the cell 21 is reduced.

[0133] In some embodiments, the holder 22 is integrally molded with the cell 21, which can improve the connection strength between the holder 22 and the cell 21. Integral molding refers to directly fixing the holder 22 to the cell 21. The integral molding method includes, but is not limited to, a pouring process and an injection process.

[0134] In some embodiments, an insulating material is placed around the cell 21 by a pouring process, and then the insulating material is cured to form the holder 22, and the holder 22 and the cell 21 are bonded and fixed, for example, the cell 21 is placed in a mold, the insulating material is poured into the mold, the insulating material is cured to form the holder 22, and is bonded and fixed to the cell 21, and then the holder 22 and the cell 21 are removed from the mold.

[0135] In some embodiments, the insulating material includes, but is not limited to, potting glue, styrofoam.

[0136] In some embodiments, the injection molding process involves placing the cell 21 into a mold, heating and melting the insulating material with an injection machine, causing the molten insulating material to flow into the mold, hardening the insulating material to form the holder 22 and bond and secure the cell 21, and then removing the holder 22 and cell 21 from the mold. Preferably, the insulating material comprises polyamide.

[0137] In some embodiments, the holder 22 is an insulating holder, which can reduce the risk of shorting between the holder 22 and the cell 21.

[0138] In some embodiments, the holder 22 includes a first holder 22 a , which covers at least a portion of the sealing portion 212 .

[0139] In some embodiments, the first holder 22a includes at least one first side 222, and each first side 222 covers one first sealing fold 2122. The first holder 22a covers a portion of the first sealing portion 212a, thereby providing additional protection to the first sealing portion 212a.

[0140] In some embodiments, the first side 222 is connected to the bottom wall 12 and is positioned such that when the cell 21 expands, the first side 222 moves relative to the bottom wall 12 along a direction opposite to the first direction X.

[0141] In some embodiments, the first side 222 is connected to the bottom wall 12 and is positioned such that the first side 222 moves relative to the bottom wall 12 along the first direction X when the expansion of the cell 21 is reduced.

[0142] In some embodiments, the first side 222 is connected to the first insulating sheet 110 and is arranged such that the first side 222 moves on the first insulating sheet 110 along a direction opposite to the first direction X when the cell 21 expands. For example, the first side 222 is contact-connected to the first insulating sheet 110.

[0143] In some embodiments, the first side 222 is connected to the first insulating sheet 110 and is arranged such that the first side 222 moves on the first insulating sheet 110 along the first direction X when the expansion of the cell 21 is reduced. For example, the first side 222 is contact-connected to the first insulating sheet 110.

[0144] In some embodiments, the first holder 22a includes two first sides 222, which are arranged along the second direction Y, and one of the first sides 222 is connected to the first insulating sheet 110.

[0145] When the cell 21 expands, the first side portion 222 allows the first sealing portion 212a to move relative to the first insulating sheet 110, and the first side portion 222 reduces friction with the first insulating sheet 110 when the first sealing portion 212a moves, making it easier to protect the first sealing portion 212a as it moves, and reducing the risk of the first sealing portion 212a being damaged and affecting the use of the battery pack 100.

[0146] In some embodiments, the first holder 22a includes a first portion 221, which covers at least a portion of the first sealing connection portion 2121 to provide additional protection for the first sealing portion 212a.

[0147] In some embodiments, along the second direction Y, 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 improves the structural strength of the first holder 22a, which is advantageous for protection of the first sealing portion 212a.

[0148] In some embodiments, the first holder 22a includes at least one first side extension portion 224, which covers a portion of the main body portion 211, and the first side extension portion 224 can protect the main body portion 211 and improve the connection strength between the first holder 22a and the cell 21.

[0149] In some embodiments, the first holder 22a includes at least one first side extension 224, which covers a part of the main body 211 and one of the second sealing portions 212b therein, 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 extension 224 can protect the main body 211 and the second sealing portion 212b, and can improve the connection strength between the first holder 22a and the cell 21.

[0150] In some embodiments, the first holder 22a includes two first side extensions 224, and the two first side extensions 224 are arranged along the second direction Y. One of the first side extensions 224 covers a part 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 part 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 extension 224 can protect the main body 211 and the second sealing portion 212b, and can improve the connection strength between the first holder 22a and the cell 21.

[0151] In some embodiments, the first side extension 224 is connected to the bottom wall 12 and is positioned such that when the cell 21 expands, the first side extension 224 moves relative to the bottom wall 12 along a direction opposite to the first direction X.

[0152] In some embodiments, the first side extension 224 is connected to the bottom wall 12 and is positioned such that the first side extension 224 moves relative to the bottom wall 12 along the first direction X when the expansion of the cell 21 is reduced.

[0153] In some embodiments, the first side extension 224 is connected to the first insulating sheet 110, and the first side extension 224 is arranged such that when the cell 21 expands, the first side extension 224 moves on the first insulating sheet 110 along a direction opposite to the first direction X. For example, the first side extension 224 is contact-connected to the first insulating sheet 110.

[0154] In some embodiments, the first side extension 224 is connected to the first insulating sheet 110, and the first side extension 224 is arranged such that the first side extension 224 moves on the first insulating sheet 110 along the first direction X when reducing the expansion of the cell 21. For example, the first side extension 224 is contact-connected to the first insulating sheet 110.

[0155] When the cell 21 expands, the first side extension portion 224 allows the main body portion 211 to move on the first insulating sheet 110, and the first side extension portion 224 reduces friction with the first insulating sheet 110 when the main body portion 211 moves, making it easier to protect the main body portion 211 as it moves, and reducing the risk of the main body portion 211 being damaged and affecting the use of the battery pack 100.

[0156] In some embodiments, first side extension 224 extends from first side 222 , which may be advantageous to enhance the strength of the connection between first side extension 224 and first side 222 .

[0157] In some embodiments, the body portion 211 includes a first wall 211c, and the first sealing portion 212a is connected to the first wall 211c.

[0158] In some embodiments, the first holder 22a includes a second portion 226, which covers a portion of the first wall 211c and protects the main body 211. One end of the first portion 221 is connected to one of the first sides 222 and the other end is connected to the other first side 222, and one end of the second portion 226 is connected to one of the first sides 222 and the other end is connected to the other first side 222, which further improves the structural strength of the first holder 22a, which is more advantageous for protecting the first sealing portion 212a.

[0159] In some embodiments, the first holder 22a includes two second portions 226 and two first walls 211c.

[0160] In some embodiments, the first holder 22a includes a protrusion 227 that protrudes along a direction opposite to the second direction Y to the first portion 221.

[0161] In some embodiments, the battery pack 100 includes a detection member (not shown), and a receiving groove 227a is provided on the side of the protrusion 227 away from the electrode terminal 21c, and the detection member is received in the receiving groove 227a. The detection member is arranged to detect the temperature of the cell 21. Preferably, the detection member is arranged to detect the temperature of the electrode terminal 21c. This is advantageous for improving the accuracy of detecting the cell 21 temperature.

[0162] 24, when viewed along the direction opposite to the first direction X, the electrode terminal 21c is not shielded by the protrusion 227. In some embodiments, the body portion 211 includes two second walls 211d, and the two second walls 211d are arranged along the first direction X. The first wall 211c is connected to the second wall 211d and the first sealing portion 212a.

[0163] In some embodiments, referring to FIG. 28 , when viewed along the third direction Z, in the first direction, the second portion 226 does not extend beyond the second wall 211d, and the main body portions 211 of adjacent cells 21 may be in contact and connected, and the adjacent cells 21 apply pressure to each other via the main body portions 211.

[0164] In some embodiments, referring to FIG. 28, when viewed along the third direction Z, in the first direction, the second portion 226 is located between two second walls 211d, and when the main body portions 211 of adjacent cells 21 apply pressure to each other, the force received by the first sealing portion 212a can be reduced and protection for the first sealing portion 212a can be improved.

[0165] In some embodiments, referring to FIG. 28, when viewed along the third direction Z, in the first direction, the first side portion 222 is located between two second walls 211d, and when the main body portions 211 of adjacent cells 21 apply pressure to each other, the force received by the first sealing portion 212a can be reduced and protection for the first sealing portion 212a can be improved.

[0166] In some embodiments, when viewed along the third direction Z, in the first direction, the first side extension portion 224 is located between two second walls 211d, and when the main body portions 211 of adjacent cells 21 apply pressure to each other, the force received by the first sealing portion 212a can be reduced and protection for the first sealing portion 212a can be improved.

[0167] In some embodiments, the holder 22 includes a second holder 22b, which is connected to another first sealing portion 212a.

[0168] In some embodiments, the first holder 22a and the second holder 22b have the same structure.

[0169] In some embodiments, the first holder 22a is similar to the second holder 22b, so we will not repeat the description of the structure that is the same as or similar to the first holder in the previously described embodiments, and will focus below on the structure that is different from the previously described embodiments.

[0170] Referring to Figures 24 and 25, in some embodiments, a notch 228 is provided in the second holder 22b, and a portion of the first sealing connection portion 2121 of the other first sealing portion 212a is located within the notch 228, so that when the cell 21 expands, the pressure inside the cell 21 can be discharged through the first sealing connection portion 2121 in the notch 228, which is further advantageous for pressure release and improves the safety of the cell unit 20a.

[0171] In some embodiments, the notch 228 and the sensing element are located in different holders to reduce the risk of damaging the sensing element when pressure is released.

[0172] In some embodiments, the first holder 22a can be provided with a notch 228 as shown in the second holder 22b.

[0173] 25, in some embodiments, the second holder 22b does not have the protrusion 227 shown in FIG.

[0174] 2 and 12, in some embodiments, two first position limiting portions 12b are provided on the bottom wall 12, and the two first position limiting portions 12b are spaced apart from each other along the third direction Z, and each first position limiting portion 12b extends along the first direction X. The main body portion 211 is disposed between the two first position limiting portions 12b, and the two first position limiting portions 12b guide the movement of the cell assembly 20. Preferably, the two first position limiting portions 12b guide the movement of the cell assembly 20 along the direction opposite to the first direction X. Preferably, the first position limiting portions 12b are formed to protrude from the bottom wall 12 toward the top wall 11.

[0175] In some embodiments, the body portion 211 of each cell unit 20a is disposed between two first position limiting portions 12b.

[0176] 2 and 12, in some embodiments, two second position limiting portions 11b are provided on the top wall 11, and the two second position limiting portions 11b are spaced apart from each other along the third direction Z, and each second position limiting portion 11b extends along the first direction X. The main body portion 211 is disposed between the two second position limiting portions 11b, and the two second position limiting portions 11b further guide the movement of the cell assembly 20. Preferably, the two second position limiting portions 11b guide the movement of the cell assembly 20 along the direction opposite to the first direction X. Preferably, the second position limiting portions 11b are formed to protrude from the top wall 11 toward the bottom wall 12.

[0177] In some embodiments, the body portion 211 of each cell unit 20a is disposed between two second position limiting portions 11b.

[0178] In some embodiments, the bottom wall 12 is provided with two first position limiting portions 12b, and the top wall 11 is provided with two second position limiting portions 11b.

[0179] 2 to 15, in some embodiments, the elastic member 30 includes a base portion 31, a buffer portion 32 and a connecting portion 33, where the base portion 31 is connected to the cell assembly 20 and the buffer portion 32 connects the base portion 31 and the connecting portion 33.

[0180] In some embodiments, the connector 33 is fixed to the case 10a.

[0181] In some embodiments, along the first direction X, the cell assembly 20 is located between the base 31 and the rear wall 15, the rear wall 15 is connected to the cell assembly 20, the base 31 is connected to the cell assembly 20, and the base 31 is positioned to apply pressure to the cell assembly 20.

[0182] In some embodiments, the base 31 is connected to the first cell unit 201. Preferably, the base 31 is contact-connected to the first cell unit 201. Preferably, the base 31 and the first cell unit 201 are connected by another component.

[0183] In some embodiments, the battery pack 100 includes a first cushioning member 120, which is disposed between the base 31 and the first cell unit 201. Preferably, the first cushioning member 120 includes foam.

[0184] In some embodiments, the hardness of the first cushioning member 120 is less than the hardness of the base 31 , thereby reducing damage caused by the base 31 to the first cell unit 201 .

[0185] In some embodiments, the rear wall 15 is connected to the second cell unit 202 .

[0186] In some embodiments, the battery pack 100 includes a second cushioning member 130, which is disposed between the second cell unit 202 and the rear wall 15. Preferably, the second cushioning member 130 includes foam.

[0187] In some embodiments, the stiffness of the second cushioning member 130 is less than the stiffness of the rear wall 15 , thereby reducing the risk of the rear wall 15 damaging the second cell unit 202 .

[0188] In some embodiments, along the first direction X, the projection of the body portion 211 lies within the projection of the base 31, increasing the interaction area between the base 31 and the body portion 211. This is advantageous for the base 31 to apply pressure to the body portion 211.

[0189] In some embodiments, the foam material includes ethylene-vinyl acetate (EVA).

[0190] 3, 4, 15, and 20, in some embodiments, the battery pack 100 includes a first conductive member 50. Along the third direction Z, there is a first gap 301 between the base 31 and the case 10a, and one end of the first conductive member 50 is connected to the cell assembly 20 and the other end passes through the first gap 301.

[0191] In some embodiments, along the third direction Z, there is a first gap 301 between the base 31 and the second side wall 14 .

[0192] In some embodiments, one end of the first conductive member 50 is connected to the first cell unit 201 .

[0193] In some embodiments, the first conductive member 50 is secured to the resilient member 30 .

[0194] In some embodiments, the first conductive member 50 is arranged to be movable along with the elastic member 30, and in operational modes such as expansion, vibration, and dropping of the cell unit, the movement of the first conductive member 50 along with the elastic member 30 reduces tension on the first conductive member 50, reduces the risk of the first conductive member 50 being torn, and improves the safety of the battery pack 100. Preferably, the first conductive member 50 includes a wire harness.

[0195] In some embodiments, the first conductive member 50 is arranged to transmit the output of the cell assembly 20. The first conductive member 50 can transmit the output of the cell assembly 20. When the battery pack 100 is discharging, the electrical energy of the cell assembly 20 is transmitted to the load of the power consumption device by the first conductive member 50 to supply power to the load of the power consumption device, and when the battery pack 100 is charging, the external electrical energy is transmitted to the cell assembly 20 by the first conductive member 50 to charge the cell assembly 20.

[0196] In some embodiments, the battery pack 100 includes a second conductive member 60, and a second gap 302 is provided between the base 31 and the case 10a along the third direction Z, and one end of the second conductive member 60 is connected to the cell assembly 20 and the other end passes through the second gap 302.

[0197] In some embodiments, along the third direction Z, there is a second gap 302 between the base 31 and the first side wall 13 .

[0198] In some embodiments, one end of the second conductive member 60 is connected to the second cell unit 202 .

[0199] In some embodiments, the second conductive member 60 and the elastic member 30 are spaced apart from each other, which is advantageous in reducing tension on the second conductive member 60 and reducing the risk of the second conductive member 60 being torn during operation such as cell unit expansion, vibration, dropping, etc., and in improving the safety of the battery pack 100. Preferably, the second conductive member 60 includes a wire harness.

[0200] In some embodiments, the second conductive member 60 is arranged to transmit the output of the cell assembly 20. The second conductive member 60 can transmit the output of the cell assembly 20. When the battery pack is discharging, the electrical energy of the cell assembly 20 is transmitted by the second conductive member 60 to the load of the power consuming device to power the load of the power consuming device, and when the battery pack is charging, the external electrical energy is transmitted by the second conductive member 60 to the cell assembly 20 to charge the cell assembly 20.

[0201] In some embodiments, one of the first conductive member 50 and the second conductive member 60 is connected to a common positive terminal of the cell assembly 20, and the other is connected to a common negative terminal of the cell assembly 20.

[0202] In some embodiments, the buffer 32 is positioned to provide expansion space for the cell assembly 20 .

[0203] In some embodiments, the buffer portion 32 includes a first buffer portion 321, the first buffer portion 321 is connected to the base 31, the first buffer portion 321 can act on the cell assembly 20 through the base 31, and the first buffer portion 321 can provide expansion space for the cell assembly 20.

[0204] In some embodiments, the buffer part 32 includes a second buffer part 322, and the first buffer part 321 and the second buffer part 322 are disposed opposite to each other along the second direction Y. The first buffer part 321 is connected to one side of the base 31, and the second buffer part 322 is connected to the other side of the base 31. The second buffer part 322 can act on the cell assembly 20 through the base 31, and the second buffer part 322 can provide an expansion space for the cell assembly 20.

[0205] Referring to FIG. 3, in some embodiments, the connection portion 33 includes a first connection portion 331 , and the first connection portion 331 is connected to the first buffer portion 321 .

[0206] In some embodiments, along the first direction X, there is an overlapping portion between the projection of the first connecting portion 331 and the projection of the second fixing portion 11a, and the first connecting portion 331 is fixed to the second fixing portion 11a, so that the biasing force received by the buffer portion 32 can be transmitted to the case 10a.

[0207] In some embodiments, the first connecting portion 331 is fixed to the third fixed portion 13a. This is advantageous for transmitting the biasing force received by the buffer portion 32 to the case 10a. Preferably, the first connecting portion 331 is abutted against the third fixed portion 13a.

[0208] In some embodiments, the first connecting portion 331 is fixed to the fourth fixed portion 14a. This is advantageous for transmitting the biasing force received by the buffer portion 32 to the case 10a. Preferably, the first connecting portion 331 is abutted against the fourth fixed portion 14a.

[0209] 3, in some embodiments, the connection portion 33 includes a second connection portion 332, and the first connection portion 331 and the second connection portion 332 are disposed opposite to each other along the second direction Y. The second connection portion 332 is connected to the second buffer portion 322.

[0210] In some embodiments, along the first direction X, there is an overlapping portion between the projection of the first fixing portion 12a and the projection of the second connecting portion 332, and the second connecting portion 332 is fixed to the first fixing portion 12a, so that the biasing force received by the buffer portion 32 can be transmitted to the case 10a.

[0211] In some embodiments, the second connection portion 332 is fixed to the third fixed portion 13a. This is advantageous for transmitting the biasing force received by the buffer portion 32 to the case 10a. Preferably, the second connection portion 332 is abutted against the third fixed portion 13a.

[0212] In some embodiments, the second connection portion 332 is fixed to the fourth fixed portion 14a. This is advantageous for transmitting the biasing force received by the buffer portion 32 to the case 10a. Preferably, the second connection portion 332 is abutted against the fourth fixed portion 14a.

[0213] In the present application, the first connecting portion 331 is fixed to the second fixed portion 11a, the third fixed portion 13a, and the fourth fixed portion 14a, and the second connecting portion 332 is connected to the first fixed portion 12a, the third fixed portion 13a, and the fourth fixed portion 14a, which is advantageous in that the force of the elastic member 30 is received evenly and deformed evenly.

[0214] In some embodiments, the strength of the top wall 11, the bottom wall 12, the first side wall 13 and the second side wall 14 is greater than the strength of the elastic member 30, reducing the risk of the top wall 11, the bottom wall 12, the first side wall 13 and the second side wall 14 being deformed by the biasing force received by the buffer portion 32.

[0215] 5, 6 and 8, in some embodiments, the first buffer portion 321 includes a first segment 321a and a second segment 321b, where the first segment 321a is connected to the base portion 31, and the second segment 321b connects the first segment 321a and the first connection portion 331.

[0216] In some embodiments, the angle between the first segment 321a and the base portion 31 is the same as the angle between the second segment 321b and the first connecting portion 331. This is advantageous for the elastic member 30 to receive the force uniformly and to be deformed uniformly.

[0217] In some embodiments, the second buffer portion 322 includes a third segment 322a and a fourth segment 322b, where the third segment 322a is connected to the base portion 31 and the fourth segment 322b connects the third segment 322a to the second connecting portion 332.

[0218] In some embodiments, the angle between the third segment 322a and the base portion 31 is the same as the angle between the fourth segment 322b and the second connecting portion 332. This is advantageous for the elastic member 30 to receive the force uniformly and to be deformed uniformly.

[0219] In some embodiments, the connection portion 33 is provided with a folded portion 333, which is formed by folding back a side of the connection portion 33 that is away from the buffer portion 32 in the second direction Y. Along the first direction X, the folded portion is located between the connection portion 33 and the base portion 31. The folded portion 333 can reduce the risk that the connection portion 33 cuts the wire harness.

[0220] In some embodiments, the projection of the folded portion 333 and the projection of the buffer portion 32 along the first direction X do not overlap, which reduces the influence on the deformation area of ​​the buffer portion 32.

[0221] In some embodiments, the elastic member 30 includes a third bent portion 34. The third bent portion 34 is abutted against the second bent portion 112. This is advantageous for increasing the connection strength between the elastic member 30 and the case 10a, and for the pressure of the elastic member 30 to act on the top wall 11, bringing the top wall 11 closer to the second connecting wall 102b, thereby reducing the gap between the top wall 11 and the second connecting wall 102b.

[0222] 5 and 6, in some embodiments, the elastic member 30 includes a fourth bent portion 35. The fourth bent portion 35 is abutted against the first bent portion 122. This is advantageous for increasing the connection strength between the elastic member 30 and the case 10a, and for applying the pressure of the elastic member 30 to the bottom wall 12, bringing the bottom wall 12 closer to the first connecting wall 101b, and for reducing the gap between the bottom wall 12 and the first connecting wall 101b.

[0223] In some embodiments, the battery pack 100 includes a first connection end 102 and a second connection end 103, and the first connection end 102 and the second connection end 103 are connected to the front cover 10b. One of the first connection end 102 and the second connection end 103 is connected to the circuit board 40, and the other is connected to the first conductive member 50. The first connection end 102 and the second connection end 103 protrude from the side of the front cover 10b away from the cell assembly 20 and are used to connect to an external device.

[0224] 3 and 20, in some embodiments, the battery pack 100 includes a sampling member 70, which is connected to each cell 21, and which is connected to the circuit board 40 to transmit the acquired electrical signal of the cell 21 to the circuit board 40. Preferably, the electrode terminals 21c of adjacent cells 21 are stacked and arranged, and the sampling member 70 is connected to at least one of the electrode terminals 21c arranged in the stack. Preferably, the electrical signal includes information such as current, voltage, resistance, temperature, etc. The sampling member 70 and the electrode terminals 21c are connected by welding, which includes, but is not limited to, laser welding and ultrasonic welding.

[0225] In some embodiments, the battery pack 100 includes wires 104 and the detection member is connected to the sampling member 70 by the wires 104 .

[0226] 29, the present application provides a power consumption device 200 using at least one of the above-described battery packs 100. In one embodiment, the power consumption device 200 according to the present application may be, but is not limited to, an electronic device, a drone, a backup power source, an electric car, an electric motorcycle, an electric-assisted bicycle, an electric tool, a large-capacity home battery, and the like.

[0227] Those skilled in the art can understand that the above examples are merely illustrative of the present application, and do not limit the present application, and appropriate modifications and variations to the above examples are applicable to the embodiments of the present application without departing from the true spirit of the present disclosure.

Claims

1. The cell assembly includes a case, a front cover, and an elastic member. the cell assembly is disposed within the case; the front cover is connected to the case, the elastic member and the cell assembly are arranged along a first direction, and along the first direction, the case is connected to one side of the elastic member and the cell assembly is connected to the other side of the elastic member, The case includes a bottom wall, the cell assembly is mounted on the bottom wall, a first extending portion is provided on the bottom wall, a first connecting wall is provided on the front cover, the first extending portion is connected to the first connecting wall, and the elastic member is in contact with the first extending portion; A battery pack comprising:

2. The first extending portion includes a first extending connecting portion and a first bending portion, the first extending connecting portion is connected to the first connecting wall, and the elastic member is in contact with the first bending portion.

2. The battery pack according to claim 1 .

3. the case includes a top wall, the top wall and the bottom wall are arranged along a second direction, the top wall is provided with a second extension portion, the elastic member is in contact with the second extension portion, the first direction is perpendicular to the second direction, A second connecting wall is provided on the front cover, and the second extending portion is connected to the second connecting wall.

3. The battery pack according to claim 2 .

4. the second extending portion includes a second extending connecting portion and a second folded portion, the second extending connecting portion is connected to the second connecting wall, and the elastic member is in contact with the second folded portion; 4. The battery pack according to claim 3.

5. the elastic member includes a base, a buffer portion, and a connecting portion, the base portion being connected to the cell assembly, the buffer portion connecting the connecting portion and the base, The connection portion is fixed to the case.

5. The battery pack according to claim 4.

6. The buffer portion includes a first buffer portion, and the first buffer portion is connected to one side of the base portion; or The buffer section includes a first buffer section and a second buffer section, the first buffer section and the second buffer section are disposed opposite to each other along the second direction, the first buffer section is connected to one side of the base section, and the second buffer section is connected to the other side of the base section.

6. The battery pack according to claim 5 .

7. the connecting portion includes a first connecting portion, the elastic member includes a third bent portion, and the third bent portion is in contact with the second bent portion.

6. The battery pack according to claim 5 .

8. the connection portion includes a second connection portion, the first connection portion and the second connection portion are disposed opposite to each other along the second direction, The elastic member includes a fourth bent portion, and the fourth bent portion is in contact with the first bent portion.

8. The battery pack according to claim 7.

9. a first fixing portion is provided on the bottom wall, the second connection portion is fixed to the first fixing portion, and a projection of the first fixing portion and a projection of the second connection portion overlap each other along the first direction; and / or a second fixing portion is provided on the top wall, the first connection portion is fixed to the second fixing portion, and a projection of the second fixing portion and a projection of the first connection portion overlap each other along the first direction; 9. The battery pack according to claim 8.

10. the case includes a first side wall and a second side wall, the first side wall and the second side wall are arranged along a third direction, the first side wall is fixedly connected to the front cover, the second side wall is fixedly connected to the front cover, the first direction, the second direction, and the third direction are perpendicular to each other, a third fixing portion is provided on the first side wall, and the first connection portion and the second connection portion are fixed to the third fixing portion; and / or a fourth fixing portion is provided on the second side wall, and the first connection portion and the second connection portion are fixed to the fourth fixing portion.

9. The battery pack according to claim 8.

11. The first extension portion and the first fixed portion are arranged along the third direction, and the first fixed portion is disposed between adjacent first extension portions, and / or The second extension portion and the second fixed portion are arranged along the third direction, and the second fixed portion is disposed between adjacent ones of the second extension portions.

11. The battery pack according to claim 10.

12. the first extension portion and the second extension portion are located within the front cover; The battery pack according to any one of claims 3 to 11.

13. At least one battery pack according to any one of claims 1 to 11, 1. A power consuming device comprising:

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