CN217334249U

CN217334249U - Battery monomer, battery package and vehicle

Info

Publication number: CN217334249U
Application number: CN202221038914.3U
Authority: CN
Inventors: 张轩; 李新建; 牛力; 郭其鑫
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-30
Anticipated expiration: 2032-04-29

Abstract

The application relates to the field of batteries, and discloses a battery monomer, a battery pack and a vehicle, which are used for improving the heat dissipation performance of the battery monomer. The battery monomer comprises a battery core and a shell; the battery core is provided with a first through hole along the stacking direction of the pole pieces in the battery core, the shell is provided with a second through hole, the aperture of the first through hole is larger than that of the second through hole, and the second through hole penetrates through the first through hole so as to seal the side wall of the first through hole in the shell; the shell comprises a bottom plate, a top plate and a plurality of side plates arranged between the top plate and the bottom plate, and the second through hole penetrates from one side plate to the other side plate; and one side plate for penetrating through the second through hole is a cover plate, and the cover plate is used for being hermetically connected with the bottom plate, the top plate and the rest side plates after the battery cell is assembled.

Description

Battery monomer, battery package and vehicle

Technical Field

The application relates to the technical field of batteries, in particular to a battery monomer, a battery pack and a vehicle.

Background

With the vigorous popularization of the environment-friendly concept, the development of new energy equipment is greatly advanced. Among them, new energy vehicles are mainly used. More and more users focus on new energy vehicles when purchasing vehicles, and thus the demand of new energy vehicles is increasing in proportion. Meanwhile, the market also puts higher demands on the production speed of new energy batteries, which are power devices in new energy automobiles. The new energy battery comprises a plurality of battery monomers, and when the battery monomers are positioned in the same battery, the heat dissipation problem is one of the problems which need to be mainly overcome, so that the battery damage caused by heat accumulation in the use process is avoided, and the service life of the battery is prevented from being influenced. Therefore, the heat dissipation problem is a problem to be solved for the battery cell (power device).

SUMMERY OF THE UTILITY MODEL

The application discloses battery monomer, battery package and vehicle for promote battery monomer's heat dispersion.

In order to achieve the purpose, the application provides the following technical scheme:

in a first aspect, the present application provides a battery cell comprising: the battery cell comprises a battery cell and a shell; the battery core is provided with a first through hole along the stacking direction of the pole pieces in the battery core, the shell is provided with a second through hole, the aperture of the first through hole is larger than that of the second through hole, and the second through hole penetrates through the first through hole so as to seal the side wall of the first through hole in the shell;

the shell comprises a bottom plate, a top plate and a plurality of side plates arranged between the top plate and the bottom plate, and the second through hole penetrates from one side plate to the other non-adjacent side plate; and one side plate for penetrating through the second through hole is a cover plate, and the cover plate is used for being hermetically connected with the bottom plate, the top plate and the rest side plates after the battery cell is assembled.

The battery monomer is provided with the first through hole and the second through hole respectively through the battery core and the shell of the battery monomer, the aperture of the first through hole is larger than that of the second through hole, and the second through hole penetrates through the first through hole, so that the hole wall of the first through hole can be sealed in the shell. Therefore, partial heat in the battery core can be dissipated from the second through hole, and the heat dissipation path from the battery core to the shell can be reduced, so that the purpose of improving the heat dissipation performance of the battery monomer is achieved. Wherein, the battery monomer of this application still sets up one of the curb plate that the second through-hole runs through and is the apron, before the battery monomer equipment, is the components of a whole that can function independently structure between apron and the other parts, fixes electric core in the casing after, seals fixedly to the apron again, and this setting can make electric core easily pack into the relevant position in the casing when assembling battery monomer.

In a second aspect, the present application further provides a battery pack, comprising at least one battery pack, at least one heat conducting member, and a case for accommodating the battery pack and the heat conducting member, wherein any one of the battery packs comprises a plurality of battery cells as described in the first aspect; wherein, in any said group of cells:

the plurality of battery cells are stacked along the axial direction of the second through holes, so that the axes of the second through holes of all the battery cells are positioned on the same straight line; at least one heat conduction part penetrates through the second through holes of all the battery monomers, and two ends of the heat conduction part are connected with the cold plate of the box body.

Because including a plurality of battery monomer of this application in the battery package, on the free heat dispersion of battery obtains effectively promoting's basis in this application, the heat dispersion of the battery package that this application provided also obtains effectively promoting. Simultaneously, above-mentioned battery package still includes at least one heat-conducting component to set up at least one heat-conducting component and pass all free second through-holes of battery, ensure that the heat of second through-hole department can in time be discharged through heat-conducting component, make the free radiating efficiency of battery in the battery package obtain further promotion.

In a third aspect, the present application provides a vehicle comprising a battery pack as described in the second aspect.

Because the vehicle includes the battery package of this application, on the basis that the battery package of this application has higher heat dispersion, the vehicle that this application provided can have better security.

Drawings

Fig. 1 is a schematic diagram of a battery cell provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1 according to an embodiment of the present application;

fig. 3 is a schematic diagram of a battery cell provided in an embodiment of the present application before sealing;

fig. 4 is a partial schematic view of a battery pack according to an embodiment of the present application.

Reference numerals: 10-a battery cell; 11-a housing; 12-a second via; 20-electric core; 21-a first via; 22-an insulating layer; 31-a top plate; 32-a bottom plate; 33-side plate; 331-a first side panel; 332-a second side plate; 333-a third side plate; 334-fourth side panel; 34-a cover plate; 40-a thermally conductive member; 41-cold plate.

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 obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The battery monomer mainly comprises a shell and a battery core packaged in the shell. The heat that battery monomer produced in the course of the work mainly dispels the heat through the cold drawing of casing bottom, and at the radiating process, because most heat inside the electric core need with the mode of heat transfer, transmit to the bottom of electric core earlier, through the bottom effluvium of casing again, consequently, the heat dissipation route is longer, and the radiating effect is relatively poor.

In order to promote battery monomer heat dispersion, this application provides a battery monomer, and this battery monomer includes casing and electric core.

Fig. 1 is a schematic diagram of a battery cell provided in an embodiment of the present application, and fig. 2 is a cross-sectional view taken along a-a' in fig. 1 provided in an embodiment of the present application. As shown in fig. 1 to 2, an embodiment of the present application provides a battery cell 10, where the battery cell 10 includes a casing 11 and a battery core 20. The battery cell 20 of the battery cell 10 is provided with a first through hole 21, the casing 11 is provided with a second through hole 12, the aperture of the first through hole 21 is larger than that of the second through hole 12, and the second through hole 12 penetrates through the first through hole 21, so that the side wall of the first through hole 21 is sealed in the casing 11.

Fig. 3 is a schematic diagram of a battery cell provided in an embodiment of the present application before sealing. As shown in fig. 3, the housing 11 includes a top plate 31, a bottom plate 32 opposed to the top plate 31, and a plurality of side plates 33 between the top plate 31 and the bottom plate 32. The second through hole 12 may penetrate from any side plate 33 to another side plate 33 that is not adjacent to the side plate 33, and one of the side plates 33 may be provided as a cover plate 34, so as to facilitate the assembly of the battery cell 20 in the housing 11. When assembling the battery cell 10, the cover plate 34 may be connected to the bottom plate 32, the top plate 31, and the remaining side plates 33 after the battery cell 20 is assembled to the case 11.

The housing 11 of the battery cell 10 may be a rectangular parallelepiped structure, and the number of the side plates 33 is 4. The side plates 33 may be sequentially labeled as a first side plate 331, a second side plate 332, a third side plate 333, and a fourth side plate 334, and when the side plates 33 through which the second through holes 12 penetrate are the first side plate 331 and the third side plate 333, the first side plate 331 or the third side plate 333 may be provided as the cover plate 34, and the remaining side plates 33 may be provided as an integral connecting structure.

In a specific embodiment of the present application, the axial direction of the second through hole 12 may be parallel to the bottom plate 32, the top plate 31, the second side plate 332, and the fourth side plate 334 of the housing 11, and one of the side plates 33 penetrating through the second through hole 12 is used as the cover plate 34, so that the battery cell 20 may be placed at a corresponding position of the housing 11 in the assembly stage of the battery cell 10, and the assembly efficiency of the battery cell 10 may be improved.

In a specific embodiment, the top plate 31, the bottom plate 32, and the side plates 33 except the cover plate 34 can be integrated with each other to improve the sealing performance of the housing 11 and improve the assembling efficiency.

In order to avoid a short circuit, an insulating layer 22 may be disposed between the casing 11 and the battery cell 20, please refer to fig. 2. In a specific embodiment of the present application, the first through hole 21 and the second through hole 12 are provided, and the sidewall of the first through hole 21 is sealed in the housing 11. Wherein the first through hole 21 is formed in the battery cell 20, the second through hole 12 is formed in the casing 11, and the insulating layer 22 may be located between a hole wall of the first through hole 21 and a hole wall of the second through hole 12. The insulating layer 22 may be an insulating glue layer, an insulating coating, or an insulating film.

Further, the battery cell 20 includes a plurality of positive electrode tabs and negative electrode tabs, which are alternately and alternately disposed. And a diaphragm is arranged in the space between the positive plate and the negative plate, and the thickness of the diaphragm is in a nanometer level. In a specific embodiment of the present application, the first through hole 21 is provided, and the edge of the separator exceeds the edge of the positive electrode tab and also exceeds the edge of the negative electrode tab, so as to further increase the insulation between the battery cell 20 and the casing 11. To sum up, in the single battery that this application provided, set up first through-hole, second through-hole on electric core and casing respectively, and the pore wall of first through-hole is sealed in the casing to promote single heat dispersion of battery. Meanwhile, one of the side plates penetrating through the second through hole is set as a cover plate, which is beneficial to the assembly of the battery monomer. Consequently, the free assembly efficiency of battery has still been effectively promoted in the battery that this application provided when promoting heat dispersion.

Further, based on the battery cells, the present application provides a battery pack, and fig. 4 is a partial structural schematic view of the battery pack according to an embodiment, as shown in fig. 4, the battery includes at least one battery pack, at least one heat conduction member 40, and a case (not shown) for accommodating the battery pack and the heat conduction member 40. Wherein, a heat conducting member 40 may be provided correspondingly to any battery pack.

Specifically, in any battery pack, a plurality of battery cells 10 are stacked in parallel or in series along the axial direction of the second through hole 12, and the axes of the second through holes 12 of all the battery cells 10 are located on the same straight line. The heat conductive member 40 may be disposed in the second through-hole 12 of the battery cell 10. The heat conducting member may be, for example, a heat conducting pipe, and in a battery pack, one heat conducting pipe may penetrate through the second through holes of all the battery cells. The axes of the second through holes 12 of the respective battery cells in the battery pack are aligned, which facilitates the heat-conducting member 40 to simultaneously pass through the second through holes 12 of all the battery cells and to simultaneously remove heat from the inside of the battery pack. Meanwhile, the two ends of the heat conducting member 40 may be integrally connected with the cold plate 41 in the battery pack, so as to further improve the heat dissipation efficiency of the battery cells 10 in the battery pack. Because in this application, the free radiating efficiency of battery and assembly efficiency all obtain effectively promoting. Therefore, the heat dissipation performance and the assembly efficiency of the battery pack are effectively improved; this means that the stability of battery package obtains promoting, has effectively reduced the spoilage of battery package in the use. Therefore, the safety performance of the vehicle where the battery pack is located is effectively improved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A battery cell, comprising: the battery comprises a battery core and a shell, wherein the battery core is provided with a first through hole along the stacking direction of pole pieces in the battery core, the shell is provided with a second through hole, the aperture of the first through hole is larger than that of the second through hole, and the second through hole penetrates through the first through hole so as to seal the side wall of the first through hole in the shell;

the shell comprises a bottom plate, a top plate and a plurality of side plates arranged between the top plate and the bottom plate, and the second through hole penetrates from one side plate to another non-adjacent side plate; and one side plate for penetrating through the second through hole is a cover plate, and the cover plate is used for being hermetically connected with the bottom plate, the top plate and the rest side plates after the battery cell is assembled.

2. The battery cell as recited in claim 1 wherein the cover plate is welded to the bottom plate, the top plate and the remaining side plates.

3. The battery cell of claim 1, wherein an insulating layer is disposed between the battery core and the wall of the second through hole.

4. The battery cell of claim 3, wherein the insulating layer comprises an insulating glue layer, an insulating coating, or an insulating film.

5. The battery cell according to claim 1, wherein the battery core includes a plurality of positive plates and a plurality of negative plates, the positive plates and the negative plates are sequentially arranged alternately and at intervals, a separator is disposed between any one of the positive plates and the adjacent negative plate, and at the first through hole, the separator extends beyond the edges of the positive plates and extends beyond the edges of the negative plates.

6. The battery cell according to any one of claims 1 to 5, wherein the housing is a rectangular parallelepiped structure, the side plates include a first side plate, a second side plate, a third side plate and a fourth side plate, the second through hole penetrates from the first side plate to the third side plate, one of the first side plate and the third side plate is the cover plate, and the other is integrally connected with the second side plate and the fourth side plate.

7. The battery cell as recited in claim 6 wherein the second through hole has an axial direction parallel to the bottom plate, the second side plate, and the fourth side plate.

8. A battery pack comprising at least one battery pack, at least one heat conductive member, and a case for housing the battery pack and the heat conductive member, any of the battery packs comprising a plurality of battery cells according to any one of claims 1 to 7; wherein, in any said group of cells:

9. A vehicle characterized by comprising the battery pack according to claim 8.