CN214477692U

CN214477692U - Battery pack and power consumption device

Info

Publication number: CN214477692U
Application number: CN202120653998.0U
Authority: CN
Inventors: 李�浩; 黎昊宇; 王鹏飞
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-10-22
Anticipated expiration: 2031-03-31

Abstract

A battery pack comprises a shell, a plurality of battery cells arranged in the shell and a support piece, wherein the support piece is arranged between the two battery cells and comprises a first support part and a second support part which are oppositely arranged; along the second direction, the casing includes first convex part and second convex part, support piece locates first convex part with between the second convex part, just first supporting part connects in first convex part, the second supporting part connect in the second convex part. Still relate to an electric installation. The support piece is simple in structure, and the electric core can be fixed in the shell by reducing other elements in the assembling process of the battery, so that the assembling difficulty of the battery pack is reduced.

Description

Battery pack and power consumption device

Technical Field

The application relates to the technical field of lithium batteries, in particular to a battery pack and a power utilization device.

Background

During the assembly of the battery, the battery core is usually fixed in the casing by a bracket. The existing support for fixing the battery core is complex in structure and too many in component elements, so that the assembly difficulty of the battery is increased. And when being fixed in the casing with electric core through the support, can make electric core and casing laminating, be unfavorable for the heat dissipation of equipment and electric core.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a battery template with convenient assembly and convenient heat dissipation, so as to solve the above problems.

The embodiment of the application provides a battery pack, which comprises a shell, a plurality of battery cells arranged in the shell and a support piece, wherein the support piece is arranged between the two battery cells and comprises a first support part and a second support part which are oppositely arranged; along the second direction, the casing includes first convex part and second convex part, support piece locates first convex part with between the second convex part, just first supporting part connects in first convex part, the second supporting part connect in the second convex part.

Above-mentioned scheme is through locating support piece between two electric cores to connect first supporting part in first convex part, connect the second supporting part in the second convex part, so that support piece connects two electric cores and is fixed in the casing with two electric cores, and support piece simple structure, and need not to cooperate other components in the assembling process of battery and can be fixed in the casing with electric core, thereby reduced the equipment degree of difficulty of battery.

In a possible implementation manner, the plurality of battery cells are stacked in a first direction, the first supporting portion includes at least two supporting blocks, the two supporting blocks are respectively disposed on two opposite sides of the supporting member in a third direction, a through groove is disposed between the two supporting blocks, the third direction is perpendicular to the first direction and the second direction, and the second direction is perpendicular to the first direction.

Above-mentioned scheme is through forming logical groove between two supporting shoes to the heat that makes electricity core produce discharges through leading to the groove, so that the electricity core heat dissipation.

In a possible implementation manner, the battery pack further includes a buffer member, one side of the buffer member is connected to the support member, and the other side of the buffer member is connected to the battery cell adjacent to the support member.

Above-mentioned scheme is through setting up the bolster between support piece and electric core to when electric core rocked, electric core and support piece's impact force can be alleviated to the bolster, thereby prevents that electric core from damaging when rocking.

In a possible implementation manner, the battery cell includes an enclosure, an electrode assembly accommodated in the enclosure, and a first tab connected to the electrode assembly and extending out of the enclosure, the first tab includes a first welding portion disposed outside the enclosure, and the first welding portion and the first supporting portion are located on two opposite sides of the first protruding portion when viewed in a first direction.

Above-mentioned scheme is through locating the both sides that first convex part is relative with first weld part and first supporting part to make and form the space between first weld part and the first supporting part, thereby make the heat that electric core produced discharge from the space, the further heat dissipation of being convenient for electric core.

In a possible implementation manner, the package case includes a first portion and a second portion that are sequentially disposed, the first portion is configured to accommodate the electrode assembly, the first tab extends out of the package case from the second portion, the supporting portion is provided with a through slot, and the through slot is disposed between the second portions of two adjacent battery cells. Above-mentioned scheme is through locating logical groove between the second part of two adjacent electric cores to the heat that makes electric core produce is discharged through the groove from the second part, thereby further is convenient for the heat dissipation of electric core.

In a possible implementation manner, the first tab further includes a first extending portion disposed outside the package case, the first extending portion is disposed between the first welding portion and the second portion, and the first extending portion is at least partially located in the through groove when viewed in the first direction.

Above-mentioned scheme is located logical inslot through making first extension part at least part to make first extension and logical groove intercommunication, be favorable to the heat that electricity core produced to be discharged through the groove from first extension.

In one possible implementation manner, the battery pack further includes a first circuit board, the first welding portion is disposed on the first circuit board, and the first circuit board and the first supporting portion are located on two opposite sides of the first protruding portion as viewed in the first direction.

Above-mentioned scheme is located the both sides that first convex part is relative through making first circuit board and first supporting part to make first circuit board when the installation, with electric core and support piece separation, be favorable to the heat dissipation of electric core, and when electric core rocked, reduce the collision of electric core and first circuit board, thereby reduce the probability that electric core and first circuit board damaged when rocking.

In one possible implementation manner, the battery pack further includes a connecting member, the connecting member includes a connecting plate, a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are disposed at two opposite ends of the connecting plate, and the first circuit board is disposed between the first connecting portion and the second connecting portion.

Above-mentioned scheme is through locating first circuit board between first connecting portion and the second connecting portion to in the installation with first circuit board.

In a possible implementation manner, the connector further includes a fixing portion, the fixing portion is disposed on the connecting plate, and the fixing portion is used for fixing the first circuit board and the connector.

Above-mentioned scheme passes through and sets up the fixed part on the connecting plate to make the fixed part be fixed in on the first circuit board, with when placing first circuit board between first connecting portion and second connecting portion, be convenient for the fixed of first circuit board, and when the nut was established in order to lock first circuit board and connecting piece to the cover on the fixed part, make the moment of torsion transmission of rotatory nut to the connecting plate on, thereby avoid first circuit board atress in order to reduce the probability of first circuit board damage.

In a possible implementation manner, the first connecting portion is provided with a first groove, and the first groove is provided on the first protruding portion.

According to the scheme, the first groove is formed in the first connecting portion, and the first groove is sleeved on the first convex portion so that the connecting piece can be fixed in the shell.

In a possible implementation manner, the second connecting portion is provided with a second groove and a third groove, the second groove and the third groove are disposed on two opposite sides of the first circuit board, the second groove is disposed on the second protrusion, and the third groove is configured to accommodate the connecting structure disposed on the first circuit board.

Above-mentioned scheme is through locating the both sides that first circuit board is relative with second groove and third groove to when the second groove cooperation first groove is fixed in the casing with the connecting piece, the third groove is located the both sides different with first groove or the relative first circuit board in second groove, thereby the installation of the pencil of being convenient for, and when the pencil was too much, prevent many pencil mutual interferences.

In a possible implementation manner, the housing is provided with a first side wall and a second side wall opposite to each other along a third direction, the first protrusion and the second protrusion are provided on the first side wall, and the third direction is perpendicular to the first direction and the second direction.

Above-mentioned scheme is through setting up on the casing can with first supporting part and the first convex part of second supporting part complex and second convex part to be fixed in the casing with support piece.

An electric device comprises a body and the battery pack accommodated in the body.

The battery pack comprises a shell, a plurality of batteries and a support piece, wherein the batteries and the support piece are arranged in the shell, the support piece is arranged between two batteries, the first support part is connected to the first convex part, the second support part is connected to the second convex part, so that the support piece is connected with the two batteries and is fixed in the shell through the two batteries, the support piece is simple in structure, other elements in the assembly process of the battery are reduced, and the assembly difficulty of the battery is reduced. Further, more gaps are formed between the battery core and the shell, and heat dissipation is facilitated.

Drawings

Fig. 1 is an exploded view of a battery pack in one embodiment.

Fig. 2 is a schematic perspective view of the housing shown in fig. 1.

Fig. 3 is a side view of the battery pack shown in fig. 2.

Fig. 4 is a schematic perspective view of the battery cell, the supporting member, the first circuit board, the second circuit board, and the connecting member shown in fig. 1.

Fig. 5 is a schematic perspective view of a partial structure of the battery cell shown in fig. 4.

Fig. 6 is a cross-sectional view of the battery cell, the supporting member, the first circuit board, the second circuit board, and the connecting member shown in fig. 4.

Fig. 7 is a schematic perspective view of the supporting member shown in fig. 1.

Fig. 8 is a schematic perspective view of the first circuit board and the connector shown in fig. 2.

Fig. 9 is a perspective view of the connector shown in fig. 8.

Description of the main elements

Battery pack 100

Housing 10

First cover plate 11

First side wall 11a

First fixed part 111

Second fixed part 112

Second cover plate 12

Second side wall 12a

Third fixing part 121

Fourth fixing part 122

First convex part 13

Second convex portion 14

First end plate 15

First opening 151

Second end plate 16

Second opening 161

Battery cell 20

Packaging case 21

First portion 211

Second portion 212

First tab 23

First welding part 231

First extension 232

Second lug 24

Second welding part 241

Second extension 242

Support 30

First support part 31

Supporting block 311

Through slot 312

Second support part 32

Third support part 33

Buffer 40

First heat sink 50

First circuit board 60

First through hole 61

Second circuit board 70

Connecting piece 80

Connecting plate 81

First connection portion 82

First groove 821

Second connecting portion 83

Second groove 831

Third groove 832

Fixed part 84

Panel 90

Second heat sink 91

Conductive copper sheet 110

First direction A

Second direction B

Third direction C

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The embodiment of the application provides a battery pack, which comprises a shell, a plurality of battery cells arranged in the shell and a support piece, wherein the battery cells are stacked along a first direction, the first direction is the length direction of the shell, the support piece is arranged between the two battery cells along the first direction, and the support piece comprises a first support part and a second support part which are oppositely arranged; along the second direction, the casing includes first convex part and second convex part, support piece locates first convex part with between the second convex part, just first supporting part is connected in first convex part, the second supporting part connect in the second convex part, the second direction is the width direction of casing.

The above-mentioned group battery that provides is through locating support piece between two electric cores to connect first supporting part in first convex part, connect the second supporting part in the second convex part, so that support piece connects two electric cores and is fixed in the casing with two electric cores, and support piece simple structure, and need not to cooperate other components in the assembling process of battery and can be fixed in the casing with electric core, thereby reduced the equipment degree of difficulty of battery.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present application provides a battery pack 100, which includes a casing 10, a plurality of battery cells 20 disposed in the casing 10, and a support member 30. The plurality of battery cells 20 are stacked in the first direction a, and in the first direction a, the support member 30 is disposed between two battery cells 20, and the support member 30 includes a first support portion 31 and a second support portion 32 that are disposed opposite to each other. Along the second direction B, the housing 10 includes a first protrusion 13 and a second protrusion 14, the supporting member 30 is disposed between the first protrusion 13 and the second protrusion 14, and the first supporting portion 31 is connected to the first protrusion 13 and the second supporting portion 32 is connected to the second protrusion 14, preferably, the second direction B is perpendicular to the first direction a.

Referring to fig. 1, 2 and 3, the housing 10 includes a first cover plate 11 and a second cover plate 12 detachably connected to each other. Preferably, the first cover plate 11 is provided with a first fixing portion 111 and a second fixing portion 112, the second cover plate 12 is provided with a third fixing portion 121 and a fourth fixing portion 122, the first fixing portion 111 can be fixed with the third fixing portion 121, and the second fixing portion 112 can be fixed with the fourth fixing portion 122, so as to fix or separate the first cover plate 11 and the second cover plate 12, and thus, the plurality of stacked battery cells 20 can be conveniently disposed between the first cover plate 11 and the second cover plate 12.

In an embodiment, the first fixing portion 111, the second fixing portion 112, the third fixing portion 121, and the fourth fixing portion 122 are structures that can be fixedly connected to each other, such as a hook structure.

Further, the first cover plate 11 includes a first sidewall 11a, and the second cover plate 12 includes a second sidewall 12a, and the first sidewall 11a and the second sidewall 12a are disposed on two opposite sides of the battery cell 20 along the third direction C. Preferably, the third direction C is perpendicular to both the first direction a and the second direction B.

In one embodiment, the first protrusion 13 and the second protrusion 14 are provided on the first sidewall 11 a. Preferably, the first protrusion 13 and the second protrusion 14 are disposed from the first sidewall 11a toward the second sidewall 12 a. Preferably, the first protrusion 13 is perpendicular to the first sidewall 11a, and the second protrusion 14 is perpendicular to the first sidewall 11 a. Preferably, the first protrusion 13, the second protrusion 14 and the first sidewall 11a are integrally formed, for example, by injection molding; such as an aluminum extrusion process, etc. Preferably, the first protrusion 13 is detachably attached to the first sidewall 11a, such as by bolting. Preferably, the second protrusion 14 is detachably attached to the first sidewall 11a, such as by bolting. The first supporting portion 31 and the second supporting portion 32 can abut against the first protruding portion 13 and the second protruding portion 14 along the second direction B, and the movement of the battery cell 20 along the second direction B is limited. Preferably, in some embodiments, when the battery cell 20 is impacted by other external forces, the first supporting portion 31 and the second supporting portion 32 facilitate transmission of the impact force to the first sidewall 11a through the first protruding portion 13 and the second protruding portion 14, so as to protect the battery cell 20.

In an embodiment, the first protruding portions 13 are disposed continuously along the first direction a, the second protruding portions 14 are disposed continuously along the first direction a, the battery pack 100 includes a plurality of first supporting members 30, and a plurality of first supporting portions 31 and second supporting portions 32 are disposed between the first protruding portions 13 and the second protruding portions 14, which is beneficial for further limiting the movement of the battery cells 20 along the second direction B. Preferably, the plurality of first supporting portions 31 and the plurality of second supporting portions 32 are disposed between the first protruding portion 13 and the second protruding portion 14, so that the impact force is further transmitted to the first sidewall through the first protruding portion 13 and the second protruding portion 14, and the battery cell 20 is better protected. In other embodiments, the battery pack 100 includes a plurality of first protrusions 13 and a plurality of second protrusions 14, the first protrusions 13 are spaced apart along the first direction a, the second protrusions 14 are spaced apart along the first direction a, the battery pack 100 includes a plurality of first supporting members 30, each supporting member 30 is correspondingly disposed between one first protrusion 13 and one second protrusion 14, or a plurality of supporting members 30 are correspondingly disposed between one first protrusion 13 and one second protrusion 14, for example, two supporting members 30 are correspondingly disposed between one first protrusion 13 and one second protrusion 14.

In one embodiment, the battery pack 100 includes a first protrusion 13 and a second protrusion 14 provided on the second side wall 12 a. Preferably, the first protrusion 13 and the second protrusion 14 are disposed from the second sidewall 12a toward the first sidewall 11 a. Preferably, the first protrusion 13 is perpendicular to the second sidewall 12a, and the second protrusion 14 is perpendicular to the second sidewall 12 a. Preferably, the first protrusion 13, the second protrusion 14 and the second sidewall 12a are integrally formed, for example, by injection molding; such as an aluminum extrusion process, etc. Preferably, the first protrusion 13 is detachably attached to the second sidewall 12a, such as by bolting. Preferably, the second protrusion 14 is removably attached to the second sidewall 12a, such as by bolting.

In an embodiment, the first side wall 11a and the second side wall 12a are each provided with a first protrusion 13 and a second protrusion 14. The first convex portion 13 provided on the first side wall 11a and the first convex portion 13 provided on the second side wall 12a are disposed to face each other in the third direction C, and specifically, orthographic projections of the first convex portion 13 provided on the first side wall 11a and the first convex portion 13 provided on the second side wall 12a overlap each other in the third direction C. The second convex portion 14 provided on the first side wall 11a and the second convex portion 14 provided on the second side wall 12a are disposed opposite to each other, and specifically, orthogonal projections of the second convex portion 14 provided on the first side wall 11a and the second convex portion 14 provided on the second side wall 12a overlap each other in the third direction C. The first protruding portion 13 and the second protruding portion 14, which are oppositely disposed, facilitate better limiting the movement of the battery cell 20, and further facilitate conducting the impact force more uniformly to the first sidewall 11a and the second sidewall 12a through the first protruding portion 13 and the second protruding portion 14, so as to further protect the battery cell 20.

In an embodiment, the first protrusion 13 and the second protrusion 14 are structures, such as sheet structures, that can support the first supporting portion 31 and the second supporting portion 32.

The casing 10 is provided with a first end plate 15 and a second end plate 16 along a first direction a, the first cover plate 11, the second cover plate 12, the first end plate 15, and the second end plate 16 together enclose a receiving space (not shown), and the battery cell 20 is disposed in the receiving space. Preferably, the first end plate 15 has a first opening 151, and the second end plate 16 has a second opening 161, so as to form a communicating channel inside the casing 10 through the first opening 151 and the second opening 161, thereby facilitating heat dissipation of the plurality of battery cells 20 inside the casing 10.

Referring to fig. 4 and 5, the battery cell 20 includes an encapsulating case 21, an electrode assembly (not shown) accommodated in the encapsulating case 21, and a first tab 23 connected to the electrode assembly and extending out of the encapsulating case 21.

Referring to fig. 4, 5 and 6, in one embodiment, a first tab 23 extends from one end of the electrode assembly out of the package housing 21. Preferably, the first tab 23 includes a first welding portion 231 and a first extending portion 232, which are disposed outside the package casing 21, and the first welding portion 231 is used for connecting with an adjacent tab or conductive member. As viewed in the first direction a, the first welding portion 231 and the first supporting portion 31 are located on two opposite sides of the first protruding portion 13, so that a gap is formed between the first welding portion 231 and the first supporting portion 31, and therefore heat generated by the battery cell 20 is discharged from the gap, which is beneficial to heat dissipation of the battery cell 20.

The first extending portion 232 is disposed between the first welding portion 231 and the second portion 212, and preferably, when viewed along the first direction a, the first extending portion 232 is at least partially located in the through groove 312, that is, when viewed along the first direction a, the second portion 212 can extend out of the through groove 312, so that the first extending portion 232 is completely located in the through groove 312, and the second portion 212 can also be shielded by the third supporting portion 33, so that the first extending portion 232 connected to the second portion 212 is partially located in the through groove 312, which is favorable for discharging heat generated by the battery cell 20 through the first extending portion 232 via the through groove 312.

In another embodiment, the battery cell 20 further includes a second tab 24. A first tab 23 and a second tab 24 extend from opposite ends of the electrode assembly, respectively, out of the package housing 21. Preferably, the second tab 24 includes a second welding portion 241 and a second extending portion 242, which are disposed outside the package case 21, and the second welding portion 241 is used for connecting with an adjacent tab or conductive member. The second welding portion 241 and the second supporting portion 32 are located on two opposite sides of the second protrusion 14, as viewed in the first direction a, so that a space is formed between the second welding portion 241 and the second supporting portion 32, and heat generated by the battery cell 20 is discharged from the space, so as to facilitate heat dissipation of the battery cell 20.

The second extending portion 242 is disposed between the second welding portion 241 and the second portion 212, and preferably, when viewed along the first direction a, the second extending portion 242 is at least partially located in the through slot 312, that is, when viewed along the first direction a, the second portion 212 may extend out of the through slot 312, so that the second extending portion 242 is entirely located in the through slot 312, and the second portion 212 may also be shielded by the third supporting portion 33, so that the second extending portion 242 connected to the second portion 212 is partially located in the through slot 312, which is favorable for discharging heat generated by the battery cell 20 through the second extending portion 242 via the through slot 312.

In one embodiment, the first tab 23 or the second tab 24 is bent at 90 °. Preferably, the first tab 23 or the second tab 24 is bent at the first welding portion 231 and the second welding portion 241, so that the length of the first tab 23 or the second tab 24 extending out of the package case 21 is reduced by bending, and the first welding portion 231 or the second welding portion 241 is prevented from being separated from the welding region due to the tab pulled by the battery pack 100 during shaking.

Further, the package 21 includes a first portion 211 and a second portion 212 arranged in sequence, the second portion 212 being located at opposite ends of the first portion 211. Preferably, the first portion 211 is a convex hull structure formed by the package case 21 and having a certain receiving space (not shown) for receiving the electrode assembly therein. The second portion 212 extends from the periphery of the first portion 211 to form a flat structure, and the second portion 212 is used for sealing the battery cell 20. The first and second tabs 23 and 24 are connected to the electrode assembly at one end and extend out of the package case 21 from the second portion 212 at the other end. In other embodiments, the first tab 23 and the second tab 24 are disposed at the same end of the battery cell 20, and the first tab 23 and the second tab 24 extend from the same second portion 212 to form the first portion 211.

Referring to fig. 7, each of the first supporting portion 31 and the second supporting portion 32 includes two supporting blocks 311, and along the third direction C, the two supporting blocks 311 are respectively disposed at opposite edge portions of the supporting member 30, and a through groove 312 is disposed between the two supporting blocks 311. Preferably, the through groove 312 is disposed between the second portions 212 of two adjacent battery cells 20, so that when the battery cells 20 generate heat, the heat in the battery cells 20 can be discharged from the second portions 212 through the through groove 312. Preferably, when viewed in the first direction, a portion of the first extension 232 is located in the through slot 312, which facilitates heat dissipation of the first extension 232. Preferably, when viewed in the first direction, the second extension 242 is partially disposed in the through slot 312, so as to facilitate heat dissipation of the second extension 242.

The support 30 further includes a third support portion 33, and the first support portion 31 and the second support portion 32 are provided at opposite ends of the third support portion 33. Preferably, the side of the cell 20, which faces the cell 20, of the third supporting portion 33 is provided with an adhesive, such as a double-sided tape or other adhesive material.

In an embodiment, the support 30 is a flat plate structure to support the battery cell 20 and meanwhile abut against the first protrusion 13 and the second protrusion 14, so as to fix the battery cell 20 and the casing 10, it is understood that the type of the support 30 is not limited thereto, and the support 30 may also be a mounting seat structure or the like in another embodiment.

Referring to fig. 6 again, the battery pack 100 further includes a buffer member 40, and in an embodiment, the buffer member 40 is disposed between the supporting member 30 and the battery cell 20. One side of the buffer member 40 is connected to the supporting member 30, and the other opposite side of the buffer member 40 is connected to the battery cell 20 adjacent to the supporting member 30, preferably, the buffer member 40 is bonded to the third supporting portion 33, and the buffer member 40 reduces the impact force of the supporting member 30 on the battery cell 20, so as to reduce the probability of damage to the battery cell 20.

In another embodiment, the buffer member 40 may be disposed between the two battery cells 20, and two opposite sides of the buffer member 40 are respectively connected to the two battery cells 20, so as to prevent the two battery cells 20 from shaking and colliding with each other. Preferably, the buffer member 40 and the battery cell 20 are connected by an adhesive, such as a double-sided tape.

In one embodiment, the buffer 40 includes, but is not limited to, foam, and preferably, the buffer 40 has a buffering function.

The battery pack 100 further includes a first heat dissipation member 50, in an embodiment, the first heat dissipation member 50 is disposed between two battery cells 20, and the first heat dissipation member 50 and the buffer member 40 are disposed at intervals, that is, the battery cells 20 are connected between the first heat dissipation member 50 and the buffer member 40, so that heat generated by the battery cells 20 is exhausted through the first heat dissipation member 50.

It is understood that, in another embodiment, the first heat dissipation member 50 may also be disposed between the battery cell 20 and the support member 30.

In one embodiment, the first heat dissipation element 50 includes, but is not limited to, a hollow aluminum sheet structure. Referring to fig. 3 and fig. 6, in an embodiment, the battery pack 100 further includes a first circuit board 60, and the first soldering portion 231 is disposed on the first circuit board 60. The first circuit board 60 and the first support part 31 are located on opposite sides of the first convex part 13 as viewed in the first direction a, so that a gap is formed between the first circuit board 60 and the battery cell 20 and the support member 30 to facilitate heat dissipation.

Further, the first circuit board 60 is provided with a first through hole 61, the first tab 23 extends out of the first through hole 61, and the first welding portion 231 is welded to a copper plate (not shown) outside the first circuit board 60.

In another embodiment, the battery pack 100 further includes a second circuit board 70, the first circuit board 60 and the second circuit board 70 are disposed at two opposite ends of the battery cell 20, and the second welding portion 241 is disposed on the second circuit board 70. The second circuit board 70 and the second support portion 32 are located on opposite sides of the second convex portion 14 as viewed in the first direction a, so that a gap is formed between the second circuit board 70 and the battery cell 20 and the support member 30 to facilitate heat dissipation.

Further, the second circuit board 70 is provided with a second through hole (not shown), the second tab 24 extends out of the second through hole, and the second soldering portion 241 is soldered to a copper plate (not shown) on the outer side of the second circuit board 70.

Referring to fig. 8 and 9, the battery pack 100 further includes a connecting member 80. The connecting member 80 includes a connecting plate 81, a first connecting portion 82 and a second connecting portion 83, the first connecting portion 82 and the second connecting portion 83 are disposed at opposite ends of the connecting plate 81, and the first circuit board 60 is disposed between the first connecting portion 82 and the second connecting portion 83, so that the first circuit board 60 is fixed in the housing 10 by the first connecting portion 82 and the second connecting portion 83.

Further, the first connecting portion 82 has a first groove 821, and the first groove 821 can be sleeved on the first protrusion 13, so that the first connecting portion 82 is fixed relative to the first protrusion 13 and the housing 10.

Furthermore, the second connecting portion 83 is formed with a second groove 831 opposite to the first groove 821, and the second groove 831 can be disposed on the second protrusion 14 to cooperate with the first groove 821 to fix the connecting member 80 in the housing 10.

The second connecting portion 83 further has a third groove 832, and the second groove 831 and the third groove 832 are disposed on two opposite sides of the first circuit board 60, that is, the first groove 821 and the second groove 831 are disposed on the inner side of the first circuit board 60, and the third groove 832 is disposed on the outer side of the first circuit board 60. When the first circuit board 60 is fixed in the housing 10 through the first groove 821 and the second groove 831, the third groove 832 extends out of the first circuit board 60, the battery pack 100 further includes a connection structure disposed on the first circuit board 60, and at least a portion of the connection structure is disposed in the third groove 832, so that the connection structure is limited, the assembly and the fixation are facilitated, and the interference between the connection structure and other structural members is reduced. Preferably, the connecting structure comprises a wire harness. Preferably, the connection structure includes a conductive copper sheet 110.

The connecting member 80 further includes a fixing portion 84, and the fixing portion 84 is disposed on the connecting plate 81 and can be fixed on the first circuit board 60. When the first circuit board 60 is fixed between the first connection portion 82 and the second connection portion 83, the fixing portion 84 is protruded out of the hole on the first circuit board 60 and fixed on the first circuit board 60, so as to increase the stability of the first circuit board 60 fixed between the first connection portion 82 and the second connection portion 83. Preferably, the connecting structure includes a conductive copper sheet 110, the conductive copper sheet 110 is provided with an opening, and the fixing portion 84 penetrates through the hole on the first circuit board 60 and the opening on the conductive copper sheet 110 to fix the connecting member 80, the first circuit board 60 and the conductive copper sheet 110, so as to save space.

In one embodiment, the fixing portion 84 is a screw. The fixing portion 84 passes through a hole on the first circuit board 60 and is fixed by a nut (not shown). When the nut fixes the first circuit board 60 between the first connection portion 82 and the second connection portion 83, the nut is rotated on the fixing portion 84, so that the nut clamps the first circuit board 60. Torque generated by the nut during rotation is transmitted to the coupling plate 81, thereby reducing interference of the torque generated when the nut is rotated with the first circuit board 60. It is understood that the type of the fixing portion 84 is not limited thereto, and any structure may be used that can fix the fixing portion to the connection plate 81 and fix the first circuit board 60 between the first connection portion 82 and the second connection portion 83.

Referring to fig. 1 again, the battery pack 100 further includes a panel 90 and a second heat sink 91 disposed on the panel 90. The panel 90 is disposed at one end of the casing 10 having the first end plate 15 along the first direction a, and the second heat dissipation member 91 is disposed corresponding to the first opening 151, so that heat generated by the battery cell 20 is absorbed from the casing 10 through the first opening 151 by the second heat dissipation member 91.

In an embodiment, the second heat dissipation member 91 includes, but is not limited to, a fan, and any structure may be used to draw heat generated by the battery cell 20 out of the first opening 151.

Another embodiment of the present application further provides an electric device (not shown), which includes a body (not shown) and a battery pack 100 accommodated in the body, where the battery pack 100 is the battery pack 100 described in the previous embodiment, and therefore, the electric device has all the advantages of the battery pack 100, and details are not repeated herein. Further, the electric device can be an electric vehicle, an electric bus, an electric automobile, and the like, and correspondingly, the body is a vehicle body structure, and the battery pack 100 set 200 is disposed in the vehicle body to supply power. It is understood that in other embodiments, the powered device may also be an energy storage device, an electric bicycle, a flying device, a handheld electric device, such as a dust collector, a weeding machine, and other devices.

In addition, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present application, and that suitable changes and modifications to the above embodiments are within the scope of the disclosure of the present application as long as they are within the true spirit and scope of the present application.

Claims

1. A battery pack comprising a housing and a plurality of cells disposed within the housing, the battery pack further comprising:

the support piece is arranged between the two battery cells and comprises a first support part and a second support part which are oppositely arranged;

along the second direction, the casing includes first convex part and second convex part, support piece locates first convex part with between the second convex part, first supporting part connects in first convex part, the second supporting part connect in the second convex part.

2. The battery pack of claim 1, wherein a plurality of the battery cells are stacked in a first direction, the first support portion comprises at least two support blocks, the support blocks are disposed on opposite sides of the support member in a third direction, a through slot is disposed between the support blocks, the third direction is perpendicular to the first direction and the second direction, and the second direction is perpendicular to the first direction.

3. The battery pack of claim 1, further comprising a buffer member coupled to the support member on one side and coupled to a cell disposed adjacent to the support member on an opposite side.

4. The battery pack of claim 1, wherein the battery cell comprises an enclosure, an electrode assembly housed in the enclosure, and a first tab connected to the electrode assembly and extending out of the enclosure, wherein the first tab comprises a first weld disposed outside the enclosure, and the first weld and the first support are located on opposite sides of the first protrusion, as viewed in a first direction.

5. The battery pack of claim 4, wherein the enclosure includes a first portion and a second portion arranged in sequence, the first portion is configured to receive the electrode assembly, the first tab extends from the second portion out of the enclosure, and the support member is configured with a through slot disposed between the second portions of two adjacent cells.

6. The battery of claim 5 wherein said first tab further comprises a first extension disposed outside of said enclosure, said first extension being disposed between said first weld and said second portion, said first extension being at least partially disposed in said through slot as viewed in a first direction.

7. The battery pack according to claim 4, further comprising a first circuit board, wherein the first soldering portion is provided on the first circuit board, and the first circuit board and the first supporting portion are located on opposite sides of the first protruding portion as viewed in the first direction.

8. The battery pack of claim 7, further comprising a connector;

the connecting piece includes connecting plate, first connecting portion and second connecting portion, first connecting portion with the second connecting portion are located the both ends that the connecting plate is relative, first circuit board is located first connecting portion with between the second connecting portion.

9. The battery pack according to claim 8, wherein the connector further comprises a fixing portion provided on the connection plate, the fixing portion being used to fix the first circuit board and the connector.

10. The battery pack according to claim 8, wherein the first connecting portion is provided with a first groove provided on the first projection.

11. The battery pack according to claim 10, wherein the second connecting portion defines a second groove and a third groove, the second groove and the third groove are disposed on opposite sides of the first circuit board, the second groove is disposed on the second protrusion, and the third groove is configured to receive the connecting structure disposed on the first circuit board.

12. The battery pack according to claim 1, wherein the case is provided with a first side wall and a second side wall opposite to each other in a third direction, the first protrusion and the second protrusion being provided on the first side wall, and the third direction being perpendicular to the first direction and the second direction.

13. An electric device, comprising a body and a battery pack accommodated in the body, wherein the battery pack is the battery pack according to any one of claims 1 to 12.