Integrated battery module liquid cooling structure and battery module

Abstract

The utility model discloses an integrated battery module liquid cooling structure and a battery module, the liquid cooling structure comprises two connecting bodies and a plurality of liquid cooling plates, and the two connecting bodies are respectively provided with a liquid inlet and a liquid outlet; the plurality of liquid cooling plates are arranged in parallel at intervals, the two ends of each liquid cooling plate are fixedly connected with the two connecting bodies to form a plurality of accommodating cavities for placing the battery modules, the liquid inlets, the inner runners of the connecting bodies and the inner runners of the liquid cooling plates are communicated, and the liquid outlets, the inner runners of the connecting bodies and the inner runners of the liquid cooling plates are communicated; the connecting body, the liquid cooling plate, the liquid inlet and the liquid outlet are of an integrally-formed structure. The technical problems that an existing bottom face cooling mode is poor in heat conduction effect, a side face cooling mode is complex in installation process, and time and labor are wasted in installation are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery module liquid cooling systems, and in particular to an integrated battery module liquid cooling structure and a battery module. Background Art

[0002] Since the thermal conductivity of the battery cells in the lithium battery module is anisotropic, the thermal conductivity is large in the direction parallel to the battery cell pole pieces and small in the direction perpendicular to the battery cell pole pieces, that is, the thermal conductivity of the battery cell is large in the height and width directions and small in the thickness direction. Therefore, the bottom and sides of the battery cell are generally cooled.

[0003] In the existing cooling structure, if the bottom surface of the battery cell is cooled, the entire liquid cooling plate is generally covered on the bottom surface of the battery cell. The installation process of the liquid cooling plate is relatively simple, but compared with the side cooling method, the heat exchange area between the liquid cooling plate and the battery cell is smaller, and the thermal conductivity effect is relatively poor; if the side of the battery cell is cooled, it is necessary to install a liquid cooling plate on the side of each battery cell, and the material of the liquid cooling plate is generally aluminum alloy. Whether it is assembled piece by piece or integrated into one, there are many structural parts, the installation process is more complicated, and the installation is time-consuming and labor-intensive. For example, the Chinese utility model patent with authorization announcement number CN217848077U discloses "Three-sided liquid cooling structure and battery module for battery module". In summary, in the existing cooling structure, neither the bottom cooling method nor the side cooling method is very ideal. Utility Model Content

[0004] In view of this, the utility model proposes an integrated battery module liquid cooling structure and a battery module to solve the technical problems that the existing bottom cooling form has poor thermal conductivity and the side cooling form has complex installation process and is time-consuming and labor-intensive to install.

[0005] In order to achieve the above-mentioned technical objectives, the technical solution of the utility model provides an integrated battery module liquid cooling structure based on flexible materials, including two connectors and multiple liquid cooling plates, the two connectors are respectively formed with a liquid inlet and a liquid outlet, the multiple liquid cooling plates are arranged in parallel and spaced apart, and both ends are respectively fixedly connected to the two connectors to form multiple accommodating cavities for placing battery modules, the liquid inlet, the connector and the internal flow channel of the liquid cooling plate are all connected, and the liquid outlet, the connector and the internal flow channel of the liquid cooling plate are all connected; wherein, the connector, the liquid cooling plate, the liquid inlet and the liquid outlet are an integrally formed structure.

[0006] Furthermore, the lengths of the plurality of liquid cooling plates are equal, and the heights of the plurality of liquid cooling plates are equal.

[0007] Furthermore, the connector is a connecting plate having the same height as that of the liquid cooling plate, wherein the connecting plate on one side forms the liquid inlet, and the connecting plate on the other side forms the liquid outlet.

[0008] Furthermore, the two connecting plates are respectively arranged on both sides of the plurality of liquid cooling plates to form a plurality of accommodating cavities with the same space size.

[0009] Furthermore, the space size of each accommodating cavity matches the external dimensions of a single battery module.

[0010] Furthermore, the internal flow channels of the plurality of liquid cooling plates are respectively connected in parallel with the internal flow channels of the two connectors.

[0011] Furthermore, the liquid cooling structure also includes a bottom plate, which is arranged at the bottom of the plurality of accommodating cavities and is fixedly connected to the two connectors and the two liquid cooling plates located at the outermost sides.

[0012] Furthermore, the internal flow channel of the bottom plate is communicated with the internal flow channel of the connector.

[0013] Furthermore, the internal flow channels of the connector, the liquid cooling plate and the bottom plate are all snake-shaped or harmonica-shaped structures.

[0014] In addition, the utility model also provides a battery module, which includes the integrated battery module liquid cooling structure based on flexible materials described in the above technical solution.

[0015] Compared with the prior art, the beneficial effects of the utility model mainly include:

[0016] The utility model provides an integrated battery module liquid cooling structure and battery module. When installing and using, it is only necessary to place each battery module in the accommodating cavity. Compared with the traditional sliced ​​or integrated aluminum alloy cold plate structure, the utility model has fewer parts and is easier to install. Therefore, compared with the traditional bottom cooling form, the utility model increases the heat exchange area of ​​the liquid cooling plate and the battery core, and has a good heat dissipation effect; compared with the traditional side cooling form, it reduces the installation of many parts and reduces the complexity of the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the liquid cooling structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the process of installing the liquid cooling structure and the battery module of the utility model;

[0019] Figure 3 It is a schematic diagram of the overall structure of the battery module of the utility model.

[0020] The reference numerals in the figures are as follows:

[0021] 100, liquid cooling structure, 101, accommodating cavity, 110, connector, 111, liquid inlet, 112, liquid outlet, 120, liquid cooling plate, 130, bottom plate;

[0022] 200. Battery module. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] like Figures 1-2 As shown, the utility model provides an integrated battery module liquid cooling structure 100, the liquid cooling structure 100 includes two connectors 110 and a plurality of liquid cooling plates 120, the plurality of liquid cooling plates 120 are arranged in parallel and spaced apart, and both ends are respectively fixedly connected to the two connectors 110 to form a plurality of accommodating cavities 101 for placing battery modules 200; the two connectors 110 are respectively formed with a liquid inlet 111 and a liquid outlet 112, the liquid inlet 111, the connector 110 and the internal flow channels of the liquid cooling plate 120 are all communicated, and the liquid outlet 112, the connector 110 and the internal flow channels of the liquid cooling plate 120 are all communicated; wherein, the connector 110, the liquid cooling plate 120, the liquid inlet 111 and the liquid outlet 112 are an integrally formed structure.

[0025] By adopting the liquid cooling structure 100 provided by the utility model, during installation, it is only necessary to place the battery module 200 into the corresponding accommodating cavity 101 and then make fine adjustments. Compared with the existing form of using aluminum alloy cold plates to cool the sides of the battery cells, the utility model has the advantage of easy installation and reduces the complexity of the installation process.

[0026] At the same time, the liquid cooling structure made of flexible materials in the present invention can make the liquid cooling plate 120 fit more closely with the heat-conducting surface of the battery core, thereby reducing thermal resistance and improving heat exchange performance.

[0027] It should be noted that the liquid cooling structure 100 provided by the utility model benefits from a flexible material, which is a composite flexible thermal conductive material. It introduces polymer materials into flexible thermal conductive materials, and utilizes the flexibility and thermal conductivity of the polymer itself to prepare a composite flexible thermal conductive material with excellent performance. One of the better ones is called "intrinsic composite flexible thermal conductive material", which is a composite thermal conductive material composed of one or more materials with thermal conductivity such as carbon materials, polystyrene, polyaniline, carbon fiber, etc., with carbon fiber having good flexibility as the main body. For example, the thermal conductivity of asphalt-based carbon fiber prepared by BPAmoco is as high as 900W (m·k), as well as polyacrylonitrile-based carbon fiber developed by Shanxi Coal Chemistry Research Institute of the Chinese Academy of Sciences and other institutions.

[0028] The liquid cooling structure 100 provided by the utility model is an integrated molded structure manufactured using the above-mentioned materials through a rubber vulcanization process, a PC vacuum forming process or a blow molding process, including a liquid inlet 111, a liquid outlet 112, and the internal flow channel of the connector 110 and the internal flow channel of the liquid cooling plate 120, which are all one-step molded products through the above-mentioned process.

[0029] In a preferred embodiment, the lengths of the plurality of liquid cooling plates 120 are equal, and the heights of the plurality of liquid cooling plates 120 are also equal.

[0030] In a preferred embodiment, the connector 110 is a connecting plate having the same height as the liquid cooling plate 120, wherein the connecting plate on one side forms the liquid inlet 111, and the connecting plate on the other side forms the liquid outlet 112. That is to say, the height of the two connectors 110 is equal to the height of the multiple liquid cooling plates 120. The functions of the two connecting plates are, first, to connect the multiple liquid cooling plates 120, and second, the internal flow channel can be used to connect the liquid inlet 111 and the internal flow channel of the liquid cooling plate 120, as well as to connect the liquid outlet 112 and the internal flow channel of the liquid cooling plate 120, so as to form a cooling pipeline.

[0031] In a preferred embodiment, the two connecting plates are respectively disposed on both sides of the plurality of liquid cooling plates 120 to form a plurality of accommodating cavities 101 of the same size, so as to facilitate the placement of the battery modules 200 .

[0032] In a preferred embodiment, the space size of each accommodating cavity 101 matches the external dimensions of a single battery module 200 .

[0033] In a preferred embodiment, the internal flow channels of the plurality of liquid cooling plates 120 are respectively connected in parallel with the internal flow channels of the two connectors 110 .

[0034] In a preferred embodiment, the liquid cooling structure may further include a base plate 130, which is disposed at the bottom of the plurality of accommodating cavities 101 and is fixedly connected to the two connectors 110 and the two outermost liquid cooling plates 120, for cooling the battery cell ground and enhancing the cooling effect of the battery module 200.

[0035] In a preferred embodiment, the internal flow channel of the bottom plate 130 is communicated with the internal flow channel of the connector 110 .

[0036] In a preferred embodiment, the internal flow channels of the connector 110 , the liquid cooling plate 120 and the bottom plate 130 include but are not limited to snake-like or harmonica-like structures.

[0037] In addition, if Figure 3 As shown, the utility model also provides a battery module 200, and the battery module 200 includes the liquid cooling structure 100 described in the above technical solution of the utility model. During installation, it is only necessary to place each battery module 200 in the accommodating cavity 101. Compared with the traditional aluminum alloy cold plate structure, the utility model has fewer parts and is easier to install, and the flexible material is more conducive to adjustment and has a higher degree of fit with the thermal conductive surface of the battery cell, which can reduce thermal resistance and improve heat exchange performance.

[0038] In summary, compared with the traditional bottom cooling form, the utility model increases the heat exchange area of ​​the liquid cooling plate and the battery core, and has a good heat dissipation effect; compared with the traditional side cooling form, it reduces the installation of many parts and components and reduces the complexity of the installation process.

[0039] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An integrated battery module liquid cooling structure, characterized in that: include: Two connectors, each of which is provided with a liquid inlet and a liquid outlet; A plurality of liquid cooling plates, the plurality of liquid cooling plates are arranged in parallel and spaced apart, and both ends of the plurality of liquid cooling plates are respectively fixedly connected to the two connectors to form a plurality of accommodating cavities for placing battery modules, the liquid inlet, the connector and the internal flow channel of the liquid cooling plate are all in communication, and the liquid outlet, the connector and the internal flow channel of the liquid cooling plate are all in communication; Wherein, the connector, the liquid cooling plate, the liquid inlet and the liquid outlet are an integrally formed structure.

2. The integrated battery module liquid cooling structure according to claim 1, characterized in that: The lengths of the plurality of liquid cooling plates are equal, and the heights of the plurality of liquid cooling plates are equal.

3. The integrated battery module liquid cooling structure according to claim 2, characterized in that: The connector is a connecting plate having the same height as that of the liquid cooling plate, wherein the connecting plate on one side forms the liquid inlet, and the connecting plate on the other side forms the liquid outlet.

4. The integrated battery module liquid cooling structure according to claim 3, characterized in that: The two connecting plates are respectively arranged on both sides of the plurality of liquid cooling plates to form a plurality of accommodating cavities with the same space size.

5. The integrated battery module liquid cooling structure according to claim 4, characterized in that: The space size of each accommodating cavity matches the external dimensions of a single battery module.

6. The integrated battery module liquid cooling structure according to claim 1, characterized in that: The internal flow channels of the plurality of liquid cooling plates are respectively connected in parallel with the internal flow channels of the two connecting bodies.

7. The integrated battery module liquid cooling structure according to claim 1, characterized in that: The liquid cooling structure further includes a bottom plate, which is disposed at the bottom of the plurality of accommodating cavities and is fixedly connected to the two connectors and the two liquid cooling plates located at the outermost sides.

8. The integrated battery module liquid cooling structure according to claim 7, characterized in that: The internal flow channel of the bottom plate is communicated with the internal flow channel of the connector.

9. The integrated battery module liquid cooling structure according to claim 8, characterized in that: The internal flow channels of the connector, the liquid cooling plate and the bottom plate are all snake-shaped or harmonica-shaped.

10. A battery module, characterized in that: It comprises the integrated battery module liquid cooling structure as described in any one of claims 1 to 9.

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