Heat dissipation battery cell module for battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a heat dissipation battery cell module for a battery pack, which comprises a U-shaped bracket with a battery cell module stacking groove, a battery cell module is arranged in the battery cell module stacking groove, the battery cell module comprises a plurality of regularly arranged battery cell single bodies, a liquid cooling plate is arranged between adjacent battery cell single bodies, and the liquid cooling plate is connected with the battery cell single bodies. The same end of each liquid cooling plate is provided with a liquid inlet interface and a liquid outlet interface, each liquid inlet interface is connected with a liquid inlet header pipe through a liquid inlet branch pipe, and the liquid inlet header pipe is provided with a liquid inlet header pipe interface; each liquid outlet connector is connected with a liquid outlet header pipe through a liquid outlet branch pipe, and a liquid outlet header pipe connector is arranged on the liquid outlet header pipe. The battery cell module not only is simple in structure, but also is good in heat dissipation effect, and can provide a stable working environment for the working of the battery cell module.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field especially, it is a kind of heat dissipation battery module for battery pack. BACKGROUND

[0002] At present, new energy vehicles are widely concerned by all sectors of society due to their excellent environmental performance, and the requirements for new energy vehicles are also constantly improving. As a kind of new energy vehicle, electric vehicles are also developing towards high safety, high energy ratio and lightweight. The main factor determining the driving range of electric vehicles is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet the driving requirements.

[0003] The power supply battery for electric vehicles is generally a battery pack composed of multiple battery modules, i.e., multiple battery modules are stacked in the same box, and then the battery modules are connected. The core battery module is generally configured with a corresponding number of battery cells according to the size of the required output voltage, and then all the battery cells are connected for voltage output. The voltage output of the battery module needs to be pre-connected with the battery pack high-voltage box built-in the box.

[0004] Since the battery module generates a large amount of heat during operation, if it is not effectively cooled, it may cause battery damage, even cause a fire, and pose a safety hazard to people. Therefore, a cooling device needs to be configured for the battery module. The existing solution generally provides a liquid cooling plate with liquid cooling on the bottom side of the battery module, which can absorb heat during the operation of the battery module, and then discharge the heat to the outside through the cooling liquid to achieve the purpose of heat dissipation. However, this method can only cool the bottom of the battery cell, while the side edge, which occupies a large area of the battery cell, is an important area of heat generation, and there is no good way to cool it in the prior art.

[0005] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. UTILITY MODEL CONTENT

[0006] The utility model aims to overcome the problems of the prior art, and provides a heat dissipation battery module for battery pack, to solve the technical problem that in the prior art, a liquid cooling plate with liquid cooling is provided on the bottom side of the battery module, which can only cool the bottom of the battery cell, while the side edge, which occupies a large area of the battery cell, is an important area of heat generation, and there is no good way to cool it in the prior art.

[0007] The above-mentioned purpose is achieved by the following technical solutions:

[0008] A heat dissipation battery cell module for a battery pack, comprising a bracket with a U-shaped battery cell module stacking groove, a battery cell module is arranged in the battery cell module stacking groove, the battery cell module comprises a plurality of regularly arranged battery cell monomers, a liquid cooling plate is arranged between adjacent battery cell monomers, an inlet liquid interface and an outlet liquid interface are arranged at the same end of each liquid cooling plate, each inlet liquid interface is connected with an inlet liquid main pipe through an inlet liquid branch pipe, and an inlet liquid main pipe interface is arranged on the inlet liquid main pipe; each outlet liquid interface is connected with an outlet liquid main pipe through an outlet liquid branch pipe, and an outlet liquid main pipe interface is arranged on the outlet liquid main pipe.

[0009] Further, terminal mounting grooves are arranged at both ends of the bracket for embedding terminal bases.

[0010] Further, a CCS assembly module is arranged at the top of the battery cell module, and an external aluminum bar is arranged at the end of the CCS assembly module and connected with the terminal base.

[0011] Further, the liquid cooling plate and the battery cell monomer are connected through a heat-conducting structural adhesive.

[0012] Further, a PC board is arranged between the battery cell monomer on the outer side and the inner wall of the bracket.

[0013] Further, a buffer foam is arranged between the PC board and the inner wall of the bracket.

[0014] Further, the liquid cooling plate comprises an upper liquid cooling plate and a lower liquid cooling plate arranged in parallel, and a front liquid cooling end plate and a rear liquid cooling end plate are arranged at both ends of the upper liquid cooling plate and the lower liquid cooling plate, the upper liquid cooling plate, the lower liquid cooling plate, the front liquid cooling end plate and the rear liquid cooling end plate are connected with each other to form a liquid cooling cavity in communication.

[0015] Further, the upper liquid cooling plate and the lower liquid cooling plate have the same specifications, and the length of the upper liquid cooling plate and the lower liquid cooling plate is not less than the length of the battery cell monomer.

[0016] Further, the bracket comprises a bracket plate for bearing the battery cell module, and side plates symmetrically arranged on both sides of the bracket plate.

[0017] Further, the terminal mounting grooves are arranged on the side plates for embedding the terminal bases.

[0018] The utility model provides a kind of heat dissipation battery module for battery pack, through U-shaped bracket to store battery module, and then form independent power module;Again by setting up liquid cooling plate between adjacent battery monomer, and by the liquid inlet and liquid outlet of each liquid cooling plate are summarized to realize synchronous liquid cooling circulation, reach the purpose of cooling battery monomer. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the utility model for battery pack's heat dissipation battery module module;

[0020] Figure 2 It is the internal structure schematic view of the utility model for battery pack's heat dissipation battery module module;

[0021] Figure 3 It is the explosion drawing of the utility model for battery pack's heat dissipation battery module module;

[0022] Figure 4 It is the structure schematic view of bracket in the utility model for battery pack's heat dissipation battery module module.

[0023] Illustration mark:

[0024] 1-bracket, 101-battery module storage groove, 102-supporting plate, 103-side plate, 104-terminal installation groove;

[0025] 2-terminal seat;

[0026] 3-battery module, 301-battery monomer, 302-CCS component module, 303-external aluminum bar;

[0027] 4-liquid cooling plate, 401-liquid inlet, 402-liquid outlet, 403-liquid inlet branch pipe, 404-liquid inlet main pipe, 405-liquid inlet main pipe interface, 406-liquid outlet branch pipe, 407-liquid outlet main pipe, 408-liquid outlet main pipe interface, 409-liquid cooling plate, 410-liquid cooling plate, 411-liquid cooling end plate, 412-liquid cooling end plate;

[0028] 5-heat-conducting structural adhesive. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail according to the drawings and examples.The described example is only a part of the utility model example, not all examples.Based on the example in the utility model, all other examples obtained by the person skilled in the art without making creative labor belong to the scope of the utility model protection.

[0030] As Figures 1-3 shown, the present scheme provides a heat dissipation cell module for a battery pack, comprising a bracket 1 with a U-shaped cell module stacking groove 101, wherein a cell module 3 is arranged in the cell module stacking groove 101, the cell module 3 comprises a plurality of regularly arranged cell monomers 301, and a liquid cooling plate 4 is arranged between adjacent cell monomers 301, one end of each liquid cooling plate 4 is respectively provided with a liquid inlet interface 401 and a liquid outlet interface 402, each liquid inlet interface 401 is connected with a liquid inlet main pipe 404 through a liquid inlet branch pipe 403, and a liquid inlet main pipe interface 405 is arranged on the liquid inlet main pipe 404; each liquid outlet interface 402 is connected with a liquid outlet main pipe 407 through a liquid outlet branch pipe 406, and a liquid outlet main pipe interface 408 is arranged on the liquid outlet main pipe 407.

[0031] The liquid outlet main pipe interface 408 and the liquid inlet main pipe interface 405 in the embodiment are respectively connected with an external cooling liquid circulating device, which is used for inputting low-temperature cooling liquid into the liquid inlet main pipe 404, and then entering the corresponding liquid cooling plate 4 through the liquid inlet branch pipe 403, and then entering the liquid outlet main pipe 404 through the liquid outlet branch pipe 406, and finally flowing into the external cooling liquid circulating device and continuing to work in a reciprocating manner.

[0032] During the flow of the cooling liquid, the low-temperature cooling liquid will reduce the heat generated by the cell work absorbed by the liquid cooling plate 4 after entering the liquid cooling plate 4, and the cooling liquid will be heated, and the heated cooling liquid will flow out of the liquid cooling plate 4 and enter the external cooling liquid circulating device, and then be cooled by the external cooling liquid circulating device, and then enter the liquid inlet main pipe 404, so as to realize the circulation cooling in a reciprocating manner.

[0033] It should be noted that the cell module 3 in the embodiment can have multiple groups, which are horizontally stacked, and the cell monomers 301 of two cell modules 3 located on the same horizontal line can be cooled by the same liquid cooling plate 4.

[0034] The bracket 1 is provided with a terminal mounting groove 104 at both ends, which is used for embedding a terminal seat 2, so as to facilitate the electrical connection of a subsequent CCS assembly module 302.

[0035] Specifically, the bracket 1 comprises a supporting plate 102 for supporting the cell module 3, and side plates 103 symmetrically arranged on both sides of the supporting plate 102, and the terminal mounting groove 104 is formed in the side plate 103 and used for embedding the terminal seat 2.

[0036] In the embodiment, the CCS assembly module 302 is arranged at the top of the cell module 3, the CCS assembly module 302 is provided with an external aluminum bar 303 at the end, and the external aluminum bar 303 is connected with the terminal seat 2.

[0037] In this embodiment, the external aluminum bar 303 of the CCS assembly module 302 is connected with the terminal seat 2 in advance, so that the external aluminum bar can be better connected with the battery high-voltage box through the copper bar, that is, the state monitoring of the battery cell is facilitated, and the management of charging and discharging is facilitated.

[0038] For the electrical connection of the copper bar and the external aluminum bar 303, only screwing is needed on the terminal seat 2.

[0039] It should be noted that the CCS assembly module in this embodiment, also known as a battery cover plate assembly, is a key electrical connection structure in the battery module, and the main functions include:

[0040] High-voltage series and parallel connection of battery cells: realizing the high-voltage series and parallel connection of battery cells in the battery module, ensuring that the battery system can work normally.

[0041] Information collection: integrating signal collection components (such as FPC, FFC, etc.), collecting information such as temperature and voltage of the battery, and providing important data support for the BMS (battery management system).

[0042] Safety protection: having overcurrent fuse function, which can quickly cut off the current when the battery system appears abnormal, preventing the expansion of faults.

[0043] As shown in Figure 2 As an optimization of the present solution, the liquid cooling plate 4 is bonded to the battery cell monomer 301 through the heat-conducting structural adhesive 5.

[0044] Here, the heat-conducting structural adhesive 5 can fill the gap between the battery cell monomer and the liquid cooling plate, achieving balanced heat dissipation; it can also quickly conduct the heat generated by the battery cell monomer 301 during work to the liquid cooling plate, ensuring that the battery cell works in the best temperature range of 20-40℃, avoiding performance degradation and safety hazards caused by overheating.

[0045] As shown in Figure 2 As a further optimization of the present solution, the battery cell monomer 301 located on the outer side is provided between the inner wall of the bracket 1 and the PC plate 6. In this embodiment, the PC plate 6 is a polycarbonate sheet, which has excellent optical performance, mechanical performance, heat resistance and electrical insulation performance, and can achieve side protection of the battery cell module.

[0046] In addition, a buffer foam is also provided between the PC plate 6 and the inner wall of the bracket 1.

[0047] Specifically, the buffer foam has excellent buffering, heat insulation, flame retardant and environmental protection properties, and can provide a stable working environment for the battery cell module placed in the bracket, without displacement caused by external vibration.

[0048] As Figure 4 shown in the embodiment, the liquid cooling plate 4 includes upper liquid cooling plates 409 and lower liquid cooling plates 410 arranged in parallel, and front liquid cooling end plates 411 and rear liquid cooling end plates 412 are arranged at both ends of the upper liquid cooling plates 409 and the lower liquid cooling plates 410, and the upper liquid cooling plates 409, the lower liquid cooling plates 410, the front liquid cooling end plates 411 and the rear liquid cooling end plates 412 are connected to each other to form a liquid cooling cavity in communication for flowing of cooling liquid.

[0049] The front liquid cooling end plate 411 is provided with the liquid inlet interface 401 and the liquid outlet interface 402.

[0050] It should be noted that the liquid inlet interface 401 corresponds to the upper liquid cooling plate 409, and the liquid outlet interface 402 corresponds to the lower liquid cooling plate 410, so that the circulation of the cooling liquid in and out can be facilitated.

[0051] The upper liquid cooling plates 409 and the lower liquid cooling plates 410 have the same specifications, and the length of the upper liquid cooling plates 409 and the lower liquid cooling plates 410 is not less than the length of the battery monomer 301, so that the upper liquid cooling plates 409 and the lower liquid cooling plates 410 can completely act on the side surface of the battery monomer 301.

[0052] The above only describes the implementation manner of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A thermal management cell module module for a battery pack, comprising: The application relates to a bracket (1) comprising a U-shaped battery cell module stacking groove (101), wherein a battery cell module (3) is arranged in the battery cell module stacking groove (101), the battery cell module (3) comprises a plurality of regularly arranged battery cell monomers (301), a liquid cooling plate (4) is arranged between adjacent battery cell monomers (301), one end of each liquid cooling plate (4) is respectively provided with an inlet liquid interface (401) and an outlet liquid interface (402), each inlet liquid interface (401) is connected with an inlet liquid main pipe (404) through an inlet liquid branch pipe (403), and an inlet liquid main pipe interface (405) is arranged on the inlet liquid main pipe (404); each outlet liquid interface (402) is connected with an outlet liquid main pipe (407) through an outlet liquid branch pipe (406), and an outlet liquid main pipe interface (408) is arranged on the outlet liquid main pipe (407).

2. The thermal management cell module module for battery packs of claim 1, wherein, Terminal mounting grooves (104) are arranged at two ends of the bracket (1) and used for embedding terminal bases (2).

3. The thermal management cell module module for a battery pack of claim 2, wherein, A CCS assembly module (302) is arranged at the top of the battery cell module (3), and an external aluminum bar (303) is arranged at the end of the CCS assembly module (302) and connected with the terminal base (2).

4. The thermal management cell module module for battery packs of claim 1, wherein, The liquid cooling plate (4) and the battery cell monomer (301) are bonded through a heat-conducting structural adhesive (5).

5. The thermal management cell module module for battery packs of claim 1, wherein, A PC plate (6) is arranged between the battery cell monomer (301) on the outer side and the inner wall of the bracket (1).

6. The thermal management cell module module for a battery pack of claim 5, wherein, A buffer foam is further arranged between the PC plate (6) and the inner wall of the bracket (1).

7. The thermal management cell module module for battery packs of claim 1, wherein, The liquid cooling plate (4) comprises parallel arranged upper and lower liquid cooling plates (409) and (410), and front and rear liquid cooling end plates (411) and (412) are arranged at two ends of the upper and lower liquid cooling plates (409) and (410), the upper and lower liquid cooling plates (409) and (410), the front and rear liquid cooling end plates (411) and (412) are connected with each other to form a liquid cooling cavity in communication.

8. The thermal management cell module module for a battery pack of claim 7, wherein, The upper and lower liquid cooling plates (409) and (410) have the same specification, and the length of the upper and lower liquid cooling plates (409) and (410) is not less than the length of the battery cell monomer (301).

9. The thermal management cell module module for battery packs of claim 2, wherein, The bracket (1) comprises a bracket plate (102) for bearing the battery cell module (3) and side plates (103) symmetrically arranged at two sides of the bracket plate (102).

10. The thermal management cell module module for a battery pack of claim 9, wherein, The terminal mounting grooves (104) are arranged on the side plates (103) and used for embedding the terminal bases (2).

Images