CN219626737U

CN219626737U - Liquid cooling device for battery pack

Info

Publication number: CN219626737U
Application number: CN202320041295.1U
Authority: CN
Inventors: 李�柱; 娄隆圣; 郑举东; 杨尚勇
Original assignee: Fujian Super Power New Energy Co ltd
Current assignee: Fujian Super Power New Energy Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-09-01
Anticipated expiration: 2033-01-06

Abstract

The utility model relates to the technical field of battery management equipment, in particular to a battery pack liquid cooling device, which comprises a first shell, wherein the first shell is formed by surrounding at least two oppositely arranged side plates and a bottom plate, the first shell is used for accommodating at least one group of battery cell modules, the side plates and the bottom plate are internally provided with independent flow channels for cooling liquid to flow through, and the side plates and the bottom plate are coupled with the corresponding surfaces of the battery cell modules in a heat conduction way. The battery pack liquid cooling device provided by the utility model can effectively avoid temperature difference caused by uneven heat dissipation in the battery pack in the heat dissipation process, and effectively ensure the working performance of the battery pack.

Description

Liquid cooling device for battery pack

Technical Field

The utility model relates to the technical field of battery management equipment, in particular to a battery pack liquid cooling device.

Background

Because the battery pack can generate a large amount of heat during the use process, especially under the high-rate and high-current use condition, a liquid cooling device is generally adopted to dissipate heat for the battery pack. The principle of the liquid cooling device for radiating the battery pack is mainly that the heat generated by the battery module is taken away by using the circulation of the cooling liquid with lower temperature in a heat conduction mode, so that the contact area and the contact position of the liquid cooling plate and the battery module become main factors influencing the cooling effect. In the design scheme of the prior liquid cooling device, a single-sided liquid cooling structure is generally adopted, the heat dissipation area is limited, the heat dissipation is uneven, and the heat dissipation effect is poor. Meanwhile, the single-sided liquid cooling heat dissipation mode causes temperature difference in the battery pack, and the performance of the battery pack is seriously affected.

Disclosure of Invention

In order to overcome the defects in the prior art, the technical problems to be solved by the utility model are as follows: the battery pack liquid cooling device can effectively avoid temperature difference in the battery pack.

In order to solve the technical problems, the utility model adopts the following technical scheme: the battery pack liquid cooling device comprises a first shell which is formed by enclosing at least two oppositely arranged side plates and a bottom plate and is used for accommodating at least one group of battery cell modules, wherein the side plates and the bottom plate are internally provided with independent flow channels for cooling liquid to flow through, and the side plates and the bottom plate are coupled with the corresponding surfaces of the battery cell modules in a heat conduction manner.

The first shell is provided with at least two liquid inlets and liquid outlets, the liquid inlets of the bottom plates in the adjacent two first shells are connected with the total water inlet through pipelines, the liquid outlets of the bottom plates are connected with the liquid inlets of the two side plates through pipelines, and the liquid outlets of the two side plates in the adjacent two first shells are connected with the total water outlet through pipelines.

The water inlet and the water outlet are respectively provided with a joint, and the second shell is provided with a through hole for fixing the joints.

And a heat conduction silica gel pad is arranged between the bottom plate and the cell module.

The first shell comprises two end plates which are arranged oppositely, and a side beam, wherein the side beam is used for connecting the end plates and the side plates.

Wherein, be provided with insulating pad between end plate and the electric core module.

The protective cover is mounted on the insulating seat, and the insulating seat is arranged on the end plate.

The utility model has the beneficial effects that: the first shell is provided with at least three surfaces for cooling the battery module, so that the heat dissipation area is increased, the heat dissipation uniformity is improved, and the temperature difference of the battery module is effectively reduced. Meanwhile, the structural strength of the battery module is increased by the arrangement of the side plates and the bottom plate, and the stability of the battery module is improved.

Drawings

FIG. 1 is an exploded view of a battery pack liquid cooling apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a liquid cooling transpose of a battery pack in an embodiment of the utility model;

FIG. 3 is an exploded view of portion A of FIG. 2;

FIG. 4 is a schematic view showing the connection of the flow channels in the first plurality of housings according to the present utility model;

fig. 5 is a schematic structural view of the second housing according to the present utility model in an embodiment.

Description of the reference numerals: 1. a side plate; 2. a bottom plate; 3. a battery cell module; 4. a side beam; 401. a main body; 402. an end face; 5. an end plate; 501. a step surface; 6. a thermally conductive silicone pad; 7. an insulating pad; 8. a copper bar; 9. an insulating base; 10. a protective cover; 11. a pipeline; 12. a three-way valve; 13. a main water inlet; 14. a main water outlet; 15. a joint; 16. a second housing; 17. and a cover plate.

Detailed Description

In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 to 5, the battery pack liquid cooling device comprises a first shell which is formed by enclosing at least two oppositely arranged side plates 1 and a bottom plate 2 and is used for accommodating at least one group of battery cell modules 3, wherein the side plates 1 and the bottom plate 2 are respectively provided with independent flow passages for cooling liquid to flow through, and the side plates 1 and the bottom plate 2 are in heat conduction coupling with the corresponding surfaces of the battery cell modules 3.

The first housing is used for accommodating at least one group of cell modules 3, the cell modules 3 are formed by combining at least two cell monomers in parallel in a conventional mode such as a converging body, and the adjacent cell modules 3 are connected through copper bars 8.

The side plates 1 and the bottom plate 2 are respectively provided with independent flow passages for cooling liquid to flow through. The surfaces of the side plate 1 and the bottom plate 2 corresponding to the cell module 3 are in thermal conduction coupling, namely, the excessive heat of the cell module 3 is taken away by low-temperature cooling liquid through thermal conduction in the coupling mode, and therefore, the heat dissipation of the cell module 3 is realized. Meanwhile, the heat dissipation mode is different from the existing single-sided heat dissipation mode, and can effectively improve the heat dissipation uniformity of the battery cell module 3, so that the situation that the temperature difference is generated inside the battery cell module 3 in the heat dissipation process, the performance of the battery pack is reduced and the like is avoided.

In one embodiment, referring to fig. 4, the number of the first shells is at least two, the flow channels are provided with liquid inlets and liquid outlets, the liquid inlets of the bottom plates 2 in the adjacent two first shells are connected with the total water inlets 13 through the pipelines 11, the liquid outlets of the bottom plates 2 are connected with the liquid inlets of the two side plates 1 through the pipelines 11, and the liquid outlets of the two side plates 1 in the adjacent two first shells are connected with the total water outlets 14 through the pipelines 11. In this connection, the low-temperature cooling liquid flows into the bottom plate 2 through the total water inlet 13, and the cooling liquid takes away the excessive heat enriched at the bottom of the cell module 3 in the flowing process in the bottom plate 2, and further flows into the flow channels of the two side plates 1, so as to take away the excessive heat enriched at the two sides of the cell module 3, and finally the high-temperature cooling liquid flows back into the compressor through the total water outlet 14 to regenerate the low-temperature cooling liquid and enter a new cycle. In a preferred embodiment, the flow passages of adjacent first housings are connected by a valve body, such as a three-way valve 12. The cooling liquid loop has fewer design interfaces, the connection in the first shell or between adjacent first shells is convenient, and the maintenance cost is low.

In one embodiment, referring to fig. 5, the battery pack liquid cooling device includes a second housing 16, the first housing is located in a cavity of the second housing 16, the total water inlet 13 and the total water outlet 14 are both provided with connectors 15, and the second housing 16 has through holes for fixing the connectors 15. By placing the plurality of first housings into the cavity of the second housing 16, the plurality of first housings and the cell modules therein are assembled and managed in a unified manner.

In one embodiment, a heat-conducting silica gel pad 6 is disposed between the bottom plate 2 and the cell module 3, that is, by disposing the heat-conducting silica gel pad 6 between the bottom plate 2 and the cell module, the heat conduction to the redundant heat at the bottom of the cell module is realized through the heat-conducting silica gel pad 6 while avoiding the abrasion between the cell module and the surface of the bottom plate 2 through the heat-conducting silica gel pad 6.

In one embodiment, the first housing comprises two oppositely disposed end plates 5, and side members 4, the side members 4 being used to connect the end plates 5 and the side plates 1. In a preferred embodiment, as shown in fig. 2 and 3, the side member 4 has a stepped body 401 and end faces 402 on both sides in the longitudinal direction of the body 401, the end plate 5 has a stepped surface 501 at the lateral edge thereof, that is, the end face 402 is fitted on the stepped surface 501, and a part of the side plate 1 is enclosed in the body 401 to achieve connection between the end plate 5 and the side plate 1. The fixing means between the end plate 5, the side plate 1 and the side member 4 is preferably fixed by bolts.

In one embodiment, the first housing further comprises a cover plate 17 for closing the opening of the first housing at the top.

In one embodiment, an insulating pad 7 is disposed between the end plate 5 and the cell module 3, that is, by setting the insulating pad 7, the electric separation between the end plate 5 and the cell module 3 is realized, so as to improve the safety of the battery pack liquid cooling device.

In one embodiment, the battery pack liquid cooling transpose comprises an insulating seat 9 and a protective cover 10 which are arranged in a matched mode, the protective cover 10 is mounted on the insulating seat 9, and the insulating seat 9 is arranged on the end plate 5.

Example 1

Referring to fig. 1 to 5, the battery pack liquid cooling device comprises a first shell formed by enclosing at least two oppositely arranged side plates 1 and a bottom plate 2, wherein the first shell is used for accommodating 20 groups of battery cell modules 3, the side plates 1 and the bottom plate 2 are respectively provided with independent flow passages for cooling liquid to flow through, and the side plates 1 and the bottom plate 2 are in heat conduction coupling with the corresponding surfaces of the battery cell modules 3;

the first shell is arranged into three, the flow channel is provided with a liquid inlet and a liquid outlet, the liquid inlets of the bottom plates 2 in the adjacent two first shells are connected with the total water inlet 13 through the pipeline 11, the liquid outlets of the bottom plates 2 are connected with the liquid inlets of the two side plates 1 through the pipeline 11, and the liquid outlets of the two side plates 1 in the adjacent two first shells are connected with the total water outlet 14 through the pipeline 11.

Example 2

The battery pack liquid cooling transposition further comprises a second shell 16 on the basis of the embodiment 1, the first shell is located in the containing cavity of the second shell 16, the total water inlet 13 and the total water outlet 14 are both provided with connectors 15, and the second shell 16 is provided with through holes for fixing the connectors 15.

Example 3

The battery pack liquid cooling device is characterized in that a heat conduction silica gel pad 6 is arranged between the bottom plate 2 and the battery cell module 3 on the basis of the embodiment 1 or the embodiment 2;

the first shell comprises two end plates 5 and side beams 4 which are oppositely arranged, and an insulating seat 9 and a protective cover 10 which are matched, wherein the side beams 4 are used for connecting the end plates 5 and the side plates 1;

an insulating pad 7 is arranged between the end plate 5 and the cell module 3;

the protective cover 10 is mounted on the insulating base 9, and the insulating base 9 is disposed on the end plate 5.

Specifically, the two side plates 1 and the two end plates 5 are spliced through the side beams 4 and assembled with the bottom plate 2 to form a first shell, the battery modules are placed in the first shell, parallel connection between the battery modules is achieved through the copper bars 8, connection of the flow channels in the first shell (the bottom plate 2 and the two side plates 1) and between adjacent first shells is achieved through the pipelines 11 (such as bendable hoses), the second shell 16 is installed outside the three first shells, and the joint 15 on the total water inlet 13 and the total water outlet 14 is fixed on the through holes on the surface of the second shell 16. This kind of liquid cooling device is through integrating liquid cooling board (curb plate 1 and bottom plate 2) on the battery module, and the integrated level is high and the two contact clearance is little, can effectively improve liquid cooling device's radiating effect to its curb plate 1 and bottom plate 2 can regard as the extra structural reinforcement of battery module, effectively promotes battery module's structural stability.

In the working process of the battery pack liquid cooling device, low-temperature cooling liquid enters the flow channel of the bottom plate 2 through the total water inlet 13, heat conducted by the heat conducting silica gel pad 6 is collected in the flowing process in the bottom plate 2, redundant heat enriched on two sides of the battery module is collected in the process of flowing through the two side plates 1, and finally the high-temperature cooling liquid is discharged through the total water outlet 14.

In summary, in the battery pack liquid cooling device provided by the utility model, the first shell is provided with at least three surfaces for cooling the battery module, so that the heat dissipation area is increased, the heat dissipation uniformity is improved, and the temperature difference of the battery module is effectively reduced. Meanwhile, the structural strength of the battery module is increased by the arrangement of the side plates and the bottom plate, and the stability of the battery module is improved.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.

Claims

1. The battery pack liquid cooling device is characterized by comprising a first shell which is formed by enclosing at least two oppositely arranged side plates and a bottom plate and is used for accommodating at least one group of battery cell modules, wherein the side plates and the bottom plate are internally provided with independent flow channels for cooling liquid to flow through, and the side plates and the bottom plate are coupled with the surfaces corresponding to the battery cell modules in a heat conduction manner.

2. The battery pack liquid cooling device according to claim 1, wherein the number of the first housings is at least two, the flow channels are provided with liquid inlets and liquid outlets, the liquid inlets of the bottom plates in the adjacent two first housings are connected with the total water inlet through pipelines, the liquid outlets of the bottom plates are connected with the liquid inlets of the two side plates through pipelines, and the liquid outlets of the two side plates in the adjacent two first housings are connected with the total water outlet through pipelines.

3. The battery pack liquid cooling device of claim 2, comprising a second housing, wherein the first housing is positioned in the cavity of the second housing, the total water inlet and the total water outlet are both provided with connectors, and the second housing has through holes for fixing the connectors.

4. The battery pack liquid cooling apparatus of claim 1 wherein a thermally conductive silicone pad is disposed between the base plate and the cell module.

5. The battery pack cooling apparatus of claim 1 wherein the first housing includes two oppositely disposed end plates and side beams connecting the end plates and side plates.

6. The battery pack cooling apparatus of claim 5 wherein an insulating gasket is disposed between the end plate and the cell module.

7. The battery pack liquid cooling apparatus of claim 5, comprising a mating insulator seat and a protective cover, the protective cover being mounted on the insulator seat, the insulator seat being disposed on the end plate.