CN210668465U

CN210668465U - Battery module and battery with same

Info

Publication number: CN210668465U
Application number: CN201921555713.9U
Authority: CN
Inventors: 曾朝勇
Original assignee: Dongguan Amperex Technology Ltd
Current assignee: Dongguan Amperex Technology Ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-06-02
Anticipated expiration: 2029-09-18

Abstract

A battery module comprises a support, a battery cell and a heat conducting piece, wherein the support comprises a bottom wall and a peripheral wall, the peripheral wall is arranged on the periphery of the bottom wall to form an accommodating space with the bottom wall, and the battery cell is accommodated in the accommodating space; the heat conducting piece is arranged on the surface, back to the bottom wall, of the battery core, a heat conducting layer is arranged on the surface of the heat conducting piece, and the heat conducting layer is connected with the peripheral wall. The application also provides a battery with the cover battery module.

Description

Battery module and battery with same

Technical Field

The present application relates to a battery module and a battery having the same.

Background

Generally, a battery is formed in the form of a battery module or a battery pack since it is required to have characteristics of high output and large capacity. However, when the battery module or the battery pack is charged and discharged, a large amount of heat is generated. If the heat cannot be effectively and timely dissipated, the temperature of the battery module or the battery pack is too high and even natural, and in severe cases, fire disasters can be caused. In addition, when the heat dissipation of the battery module or the battery pack is poor for a long time, the service life of the battery module or the battery pack is also affected.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a battery module to solve the problem of poor heat dissipation of the battery module.

The application also provides a battery with the battery module.

A battery module comprises a bracket and a battery core,

the support comprises a bottom wall and a peripheral wall, the peripheral wall is arranged on the periphery of the bottom wall to form an accommodating space with the bottom wall, and the battery cell is accommodated in the accommodating space;

the battery module further includes:

the heat conducting piece is arranged on the surface, back to the bottom wall, of the battery cell, a heat conducting layer is arranged on the surface of the heat conducting piece, and the heat conducting layer is connected with the peripheral wall.

Preferably, the battery module further comprises another bracket, and the heat conduction layer is further connected with the other bracket.

Preferably, the surface of the bracket and the surface of the battery cell are both provided with heat conduction layers.

Preferably, the heat conducting member further includes a first heat conducting portion and a second heat conducting portion, the battery cell is provided with a tab, and the first heat conducting portion is disposed on a surface of the tab, which is opposite to the bottom wall, and is located on a surface of the battery cell provided with the tab; the second heat conduction part is arranged on the surface, back to the bottom wall, of the battery cell.

Preferably, the second heat conduction part completely covers a surface of the battery cell opposite to the bottom wall.

Preferably, the thickness of the heat conduction layer is 3-5 μm.

Preferably, the heat conducting member is foam, and the maximum compression amount of the foam is 70-80%.

A battery comprises a shell and a battery module, wherein the battery module is arranged in the shell.

Preferably, the housing includes a body and a cover, the body includes an accommodating space, the cover is disposed on the body to seal the accommodating space, the battery module is accommodated in the accommodating space, the circumferential wall of the bracket is connected to the body, and the inner surface of the body is provided with a heat conduction layer.

Preferably, the body includes a bottom plate and a side plate, the side plate is disposed on a periphery of the bottom plate to form the accommodating space, an edge of the side plate, which is far away from the bottom plate, is bent outward to form a boss, and the cover is connected to the boss.

In summary, the heat conducting layers are disposed on the surface of the bracket, the surface of the battery cell and the surface of the heat conducting member in the battery module. Part of heat generated by the battery cell during charging and discharging is directly transferred to the bracket; the other part of heat is transferred to the heat conducting piece through the heat conducting layer and then transferred to the support through the heat conducting piece, so that the heat generated by the battery core during charging and discharging is simultaneously dissipated through a plurality of heat conducting paths, and the heat dissipation performance of the battery module is effectively improved.

Drawings

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure.

Fig. 3 is a partial cross-sectional view illustrating a battery module according to an embodiment of the present disclosure.

Fig. 4 is a partial cross-sectional view illustrating a battery module according to another embodiment of the present disclosure.

Fig. 5 is a partial cross-sectional view illustrating a battery module according to still another embodiment of the present disclosure.

Fig. 6 is a schematic structural view of a battery module according to another embodiment of the present disclosure.

Description of the main elements

Battery with a battery cell	100
		Battery module	10
Support frame	11
		Bottom wall	111
Peripheral wall	112
		Opening of the container	1121
Containing space	113
		Battery cell	12
Tab for fixing a terminal	121
		Heat conducting member	13
A first heat conduction part	131
		Second heat conduction part	132
Heat conducting layer	14
		Connecting piece	15
Shell body	20
		Body	21
Base plate	211
		Side plate	212
Boss	213
		Through hole	2131
Cover body	22
		Fitting hole	221
Accommodating space	23

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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.

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, the present embodiment provides a battery 100. The battery 100 includes a battery module 10 and a case 20.

Referring to fig. 2, the battery module 10 includes a bracket 11, a battery cell 12, and a heat conducting member 13.

The holder 11 includes a bottom wall 111 and a peripheral wall 112. The peripheral wall 112 is disposed on the periphery of the bottom wall 111 to form an accommodating space 113 with the bottom wall 111. The battery cell 12 is disposed on the bottom wall 111 and is accommodated in the accommodating space 113. Since the battery cell 12 is in direct contact with the bottom wall 111, heat generated by the battery cell 12 during charging and discharging can be directly transferred to the bottom wall 111 and then transferred from the bottom wall 111 to the peripheral wall 112. The bracket 11 is made of a metal material, a plastic material, or a composite material of metal and plastic. In the present embodiment, the bracket 11 is made of an aluminum material. In another embodiment, the bottom wall 111 and the peripheral wall 112 of the holder 11 may be made of the same material or different materials.

In the present embodiment, the bottom wall 111 has a rectangular shape. In other embodiments, the shape of the bottom wall 111 may be adjusted according to the shape of the battery cell 12 or other requirements, and may be an oval shape, a rhombus shape, or other irregular shapes.

The battery cell 12 is provided with a tab 121. The peripheral wall 112 is provided with an opening 1121. The tab 121 is exposed to the opening 1121 to be electrically connected to other elements in the battery 100, such as a battery protection plate (not shown) through the opening 1121.

Referring to fig. 3, the surface of the holder 11 is also provided with a heat conductive layer 14. Wherein the heat conductive layer 14 has high thermal conductivity and is electrically non-conductive. In the present embodiment, the thickness of the heat conductive layer 14 is 3 μm to 5 μm. The thermally conductive layer 14 comprises a nanocarbon material. In this way, when the support 11 is made of a plastic material, heat generated by the battery cells 12 during charging and discharging can also be transferred through the heat conducting layer 14 on the support 11. In another embodiment, when the support 11 is made of a metal material, the surface of the support 11 may also be provided with a heat conducting layer 14 to better assist the heat dissipation of the battery cells 12.

Referring to fig. 4, in other embodiments, the heat conductive layer 14 is also disposed on the surface of the battery cell 12.

Referring to fig. 2, the battery module 10 further includes a connecting member 15. The connecting member 15 is disposed between the bottom wall 111 and the battery cell 12, and is used for fixing the battery cell 12 to the bottom wall 111. In this embodiment, the connecting member 15 is made of glue. In other embodiments, the battery cell 12 and the bracket 11 may also be fixed to the bracket 11 by clamping, screwing, or other embodiments. Wherein said connecting element 15 may optionally be omitted.

Referring to fig. 2 and 5, the heat conducting member 13 is disposed on a surface of the battery cell 12 opposite to the bottom wall 111. Wherein the surface of the heat conductive member 13 is provided with the heat conductive layer 14. The heat conductive layer 14 of the heat conductive member 13 is connected to the peripheral wall 112. In this way, part of the heat generated by the battery cells 12 during charging and discharging is transferred from the heat conductive layer 14 on the heat conductive member 13 to the peripheral wall 112. Meanwhile, another part of heat generated by the battery cell 12 during charge and discharge is transferred from the bottom wall 111 to the peripheral wall 112. In the present embodiment, the heat conducting member 13 is foam. The maximum compression amount of the foam is 70-80%.

In one embodiment, the heat conducting member 13 may also be a heat conducting film. Wherein the heat conductive layer 14 of the heat conductive member 13 may be omitted as appropriate.

The heat-conducting member 13 further includes a first heat-conducting portion 131 and a second heat-conducting portion 132. The heat conductive layer 14 is provided on both the surface of the first heat conduction portion 131 and the surface of the second heat conduction portion 132. The first heat conduction portion 131 is disposed on a surface of the tab 121 opposite to the bottom wall 111, and is located on a surface of the battery cell 12 where the tab 121 is disposed. The second heat conduction portion 132 is disposed on a surface of the battery cell 12 opposite to the bottom wall 111. In another embodiment, the second thermal conduction portion 132 completely covers a surface of the battery cell 12 opposite to the bottom wall 111.

In one embodiment, the first heat conduction portion 131 is connected to the second heat conduction portion 132. In other embodiments, the first heat conduction portion 131 and the second heat conduction portion 132 are disposed at an interval.

Referring to fig. 6, in another embodiment, the battery module 10 includes two brackets 11, the battery cells 12 accommodated in the two brackets 11, and a first heat conduction portion 131 and a second heat conduction portion 132 disposed on the battery cells 12. Two of the holders 11 are stacked. In the present embodiment, the heat conduction member 13 on one of the battery cells 12 is further connected to the bottom wall 111 of the adjacent bracket 11. In this way, part of the heat generated by one of the cells 12 during charging and discharging can be transferred to the adjacent bracket 11 through the heat conducting layer 14 on the heat conducting member 13. In another embodiment, the number of the bracket 11, the battery cell 12 and the heat conducting member 13 may be adaptively adjusted according to actual needs, and is not limited to three, four, five, and the like.

Referring to fig. 1, the housing 20 includes a body 21 and a cover 22. The body 21 includes a bottom plate 211 and side plates 212. The side plates 212 are disposed at the periphery of the bottom plate 211 to form an accommodating space 23 together with the bottom plate 211. The cover 22 is disposed on a side of the bottom plate 211 away from the bottom plate 211 to seal the accommodating space 23 together with the body 21. The battery module 10 is accommodated in the accommodating space 23. The bracket 11 of the battery module 10 is connected to the body 21. The heat generated by the battery cell 12 during charging and discharging can be transferred from the bracket 11 to the body 21, and then transferred from the body 21 to the cover 22. The housing 20 is made of a metal material, a plastic material, or a composite material of metal and plastic.

Further, the body 21 and the cover 22 of the housing 20 may be made of different materials. In one embodiment, the cover 22 is made of a metal material and the body 21 is made of a plastic material. In this case, the heat conductive layer 14 is required to be disposed on the inner surface of the main body 21. In this way, heat generated by the battery cell 12 during charging and discharging can be transferred from the bracket 11 to the heat conduction layer 14 on the body 21, and then transferred from the heat conduction layer 14 on the body 21 to the cover 22.

In this embodiment, the edge of the side plate 212 away from the bottom plate 211 is bent outward to form a boss 213. The cover 22 is connected to the boss 213. The boss 213 is provided with a through hole 2131, and the cover 22 is provided with a matching hole 221 matching with the through hole 2131. Thus, the cover 22 is fixed to the body 21 by bolts (not shown) passing through the through holes 2131 of the bosses 213 and the mating holes 221 of the cover 22.

In other embodiments, the cover 22 and the boss 213 may be fixed to the body 21 by other means such as welding or bonding.

The present application will be specifically described below by way of examples.

Example 1

Referring to fig. 2 and 5, the battery module 10 includes a bracket 11, a battery cell 12, a first heat conduction portion 131, and a second heat conduction portion 132.

The holder 11 includes a bottom wall 111 and a peripheral wall 112. The peripheral wall 112 is disposed on the periphery of the bottom wall 111 to form an accommodating space 113 with the bottom wall 111. In the present embodiment, the bracket 11 is made of an aluminum material.

The battery cell 12 is disposed on the bottom wall 111 and is accommodated in the accommodating space 113. In this manner, heat generated by the battery cell 12 during charging and discharging can be transferred from the bottom wall 111 to the peripheral wall 112. In the present embodiment, the battery cell 12 is provided with a tab 121.

The first heat conduction portion 131 is disposed on a surface of the tab 121 opposite to the bottom wall 111, and is located on a surface of the battery cell 12 where the tab 121 is disposed. The second heat conduction part 132 completely covers the surface of the battery cell 12 opposite to the bottom wall 111, and is connected to the first heat conduction part 131. The heat conduction layer 14 is disposed on both the surface of the first heat conduction portion 131 and the surface of the second heat conduction portion 132. The heat conductive layer 14 of the first heat conductive portion 131 and the heat conductive layer 14 of the second heat conductive portion 132 are connected to the peripheral wall 112. In this way, part of the heat generated by the battery cells 12 during charging and discharging can be transferred to the peripheral wall 112 through the heat conduction layer 14 on the first heat conduction part 131 and the heat conduction layer 14 on the second heat conduction part 132. Meanwhile, another part of heat generated by the battery cell 12 during charging and discharging can be transferred from the heat conduction layer 14 on the first heat conduction part 131 to the second heat conduction part 132, and then transferred from the heat conduction layer 14 on the second heat conduction part 132 to the peripheral wall 112. In the present embodiment, the thickness of the heat conductive layer 14 is 3 μm to 5 μm. The thermally conductive layer 14 comprises a nanocarbon material. The heat conducting member 13 is made of foam. The maximum compression amount of the foam is 70-80%.

Example 2

Referring to fig. 3, embodiment 2 is different from embodiment 1 in that the holder 11 in embodiment 2 is made of a plastic material, and the surface of the holder 11 is provided with a heat conductive layer 14. In this way, part of the heat generated by the battery cells 12 during charging and discharging can be transferred from the heat conduction layer 14 on the first heat conduction portion 131 and the heat conduction layer 14 on the second heat conduction portion 132 to the heat conduction layer 14 on the bracket 11. Meanwhile, another part of heat generated by the battery cell 12 during charging and discharging can be transferred from the heat conduction layer 14 on the first heat conduction part 131 to the second heat conduction part 132, and then transferred from the heat conduction layer 14 on the second heat conduction part 132 to the heat conduction layer 14 on the bracket 11.

Example 3

Referring to fig. 4, embodiment 3 differs from embodiment 2 in that the surface of the battery cell 12 in embodiment 3 is provided with a heat conductive layer 14. The heat generated by the battery cell 12 during charging and discharging can be transferred through the heat conducting layer 14 on the battery cell 12.

Example 4

Referring to fig. 6, embodiment 4 differs from embodiment 1 in that the battery module 10 in embodiment 4 includes two brackets 11, a cell 12 accommodated in the two brackets 11, and a first heat conduction portion 131 and a second heat conduction portion 132 disposed on the cell 12.

In embodiment 2, two of the holders 11 are stacked. The heat conducting member 13 on one of the battery cells 12 is also connected to the bottom wall 111 of the adjacent bracket 11. In this way, part of the heat generated by one of the cells 12 during charging and discharging can be transferred to the adjacent bracket 11 through the heat conducting layer 14 on the heat conducting member 13.

In summary, the heat conducting layer 14 is disposed on the surface of the bracket 11, the surface of the battery cell 12, and the surface of the heat conducting member 13 in the battery module 10. Part of heat generated by the battery cell 12 during charging and discharging is directly transferred to the bracket 11; another part of the heat is transferred to the heat conducting member 13 through the heat conducting layer, and then transferred to the bracket 11 through the heat conducting member 13, so that the heat generated by the battery cell 12 during charging and discharging is simultaneously dissipated through a plurality of heat conducting paths, thereby effectively improving the heat dissipation performance of the battery module 10.

Although the present application has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.

Claims

1. A battery module comprises a bracket and a battery core and is characterized in that,

the battery module further includes:

2. The battery module of claim 1, wherein the battery module further comprises another bracket, and the thermally conductive layer is further connected to the other bracket.

3. The battery module of claim 1, wherein a surface of the bracket and a surface of the cell are both provided with thermally conductive layers.

4. The battery module of claim 1, wherein the thermal conduction member further comprises a first thermal conduction portion and a second thermal conduction portion, a tab is disposed on the battery cell, and the first thermal conduction portion is disposed on a surface of the tab opposite to the bottom wall and on a surface of the battery cell on which the tab is disposed; the second heat conduction part is arranged on the surface, back to the bottom wall, of the battery cell.

5. The battery module of claim 4, wherein the second thermal conductor completely covers a surface of the cell opposite the bottom wall.

6. The battery module according to any one of claims 1 to 5, wherein the thermally conductive layer has a thickness of 3 μm to 5 μm.

7. The battery module according to any one of claims 1 to 5, wherein the heat-conductive member is foam, and the maximum compression amount of the foam is 70% to 80%.

8. A battery comprising a case and the battery module according to any one of claims 1 to 7, wherein the battery module is disposed in the case.

9. The battery of claim 8, wherein the case comprises a body and a cover, the body comprises an accommodating space, the cover is disposed on the body to seal the accommodating space, the battery module is accommodated in the accommodating space, the peripheral wall of the bracket is connected to the body, and the inner surface of the body is provided with a heat conducting layer.

10. The battery of claim 9, wherein the body comprises a bottom plate and a side plate, the side plate is disposed at a periphery of the bottom plate to form the receiving space, an edge of the side plate away from the bottom plate is bent outward to form a boss, and the cover is connected to the boss.