Liquid cooling components and battery pack

Abstract

This utility model relates to a liquid cooling assembly and battery pack in the field of power battery technology. The liquid cooling assembly includes: an inlet pipe; an outlet pipe; a cell sidewall liquid cooling plate, the inlet and outlet of which are connected to the inlet and outlet pipes, respectively; a cell terminal liquid cooling plate, the inlet and outlet of which are connected to the inlet and outlet pipes, respectively; and an electrical component liquid cooling plate, the inlet and outlet of which are connected to the inlet and outlet pipes, respectively. The electrical component liquid cooling plate, the cell sidewall liquid cooling plate, and the cell terminal liquid cooling plate are arranged in parallel. The cell sidewall liquid cooling plate, the cell terminal liquid cooling plate, and the electrical component liquid cooling plate can cool and exchange heat on the sidewall of the cell, the cell terminal, and the electrical components of the battery circuit breaker unit, which are prone to heat generation, thereby improving the heat exchange effect. The parallel arrangement of the cell sidewall liquid cooling plate, the cell terminal liquid cooling plate, and the electrical component liquid cooling plate is beneficial to improving the cooling uniformity and enhancing the performance of the liquid cooling assembly and battery pack.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a liquid cooling component and battery pack. Background Technology

[0002] As the application of power batteries becomes more widespread, the requirements for their energy density are also increasing. Consequently, the problem of battery heat generation is becoming more and more obvious, especially in components such as battery cells and electrical components of the Battery Disconnect Unit (BDU). Traditional liquid cooling components are unable to meet the heat exchange requirements of the battery pack, which can easily affect the product performance of the battery pack. Summary of the Invention

[0003] This utility model provides a liquid cooling component and a battery pack to solve the technical problem of poor cooling and heat exchange effect of liquid cooling components, so as to improve the heat exchange performance of liquid cooling components and the product performance of battery packs.

[0004] To achieve the above and other related objectives, this utility model provides a liquid cooling assembly, comprising:

[0005] Inlet pipe;

[0006] Discharge tube;

[0007] A liquid cooling plate for the side wall of the battery cell, wherein the inlet of the liquid cooling plate is connected to the liquid inlet pipe, and the outlet of the liquid cooling plate is connected to the liquid outlet pipe;

[0008] A liquid cooling plate for battery cell terminals, wherein the inlet of the liquid cooling plate for battery cell terminals is connected to the liquid inlet pipe, and the outlet of the liquid cooling plate for battery cell terminals is connected to the liquid outlet pipe;

[0009] An electrical component liquid cooling plate is provided, wherein the inlet of the electrical component liquid cooling plate is connected to the liquid inlet pipe, the outlet of the electrical component liquid cooling plate is connected to the liquid outlet pipe, and the electrical component liquid cooling plate, the cell sidewall liquid cooling plate, and the cell electrode liquid cooling plate are arranged in parallel.

[0010] In one embodiment of the present invention, the liquid inlet pipe includes multiple liquid outlets, which are arranged in parallel and respectively connected to the inlets of the liquid cooling plate on the side wall of the battery cell, the liquid cooling plate on the battery cell electrode, and the liquid cooling plate on the electrical components; the liquid outlet pipe includes multiple liquid return ports, which are arranged in parallel and respectively connected to the outlets of the liquid cooling plate on the side wall of the battery cell, the liquid cooling plate on the battery cell electrode, and the liquid cooling plate on the electrical components.

[0011] In one embodiment of this utility model, the liquid cooling plate on the side wall of the battery cell includes a serpentine plate.

[0012] In one embodiment of this utility model, the cell electrode liquid cooling plate includes a harmonica tube, and the electrical component liquid cooling plate includes a stamped plate.

[0013] To achieve the above and other related objectives, this utility model also provides a battery pack, including the liquid cooling component as described above.

[0014] In one embodiment of the present invention, the battery pack further includes a battery circuit breaker unit, the battery circuit breaker unit includes electrical components, and the electrical components are mounted on the liquid cooling plate of the electrical components.

[0015] In one embodiment of the present invention, the electrical component liquid cooling plate is formed as at least part of the housing of the battery circuit breaker unit.

[0016] In one embodiment of the present invention, the electrical component includes a copper busbar, which is bonded and fixed to the liquid cooling plate of the electrical component.

[0017] In one embodiment of the present invention, the battery pack further includes a plurality of battery cell groups, the plurality of battery cell groups being arranged along a first direction, and each battery cell group having parallel-arranged liquid cooling plates on both sides along the first direction.

[0018] In one embodiment of the present invention, there are multiple battery cell terminal liquid cooling plates, which are arranged in parallel and distributed along the first direction. The battery cell group includes battery cells, and the battery cell terminal liquid cooling plates exchange heat with the terminals of the battery cells.

[0019] In one embodiment of the present invention, the battery cell includes a cylindrical battery cell, and each battery cell group includes a plurality of cylindrical battery cells distributed along a second direction. The battery cell includes a cylindrical battery cell, and the sidewall of the cylindrical battery cell exchanges heat with the liquid cooling plate on the sidewall of the battery cell.

[0020] The beneficial effects of this utility model are as follows: The liquid cooling component and battery pack proposed in this utility model can simultaneously cool and exchange heat on the sidewall liquid cooling plate of the battery cell, the terminal liquid cooling plate of the battery cell, and the electrical component liquid cooling plate of the battery circuit breaker unit, which are prone to heat generation. This is beneficial to improving the heat exchange effect. Based on this, the parallel arrangement of the sidewall liquid cooling plate of the battery cell, the terminal liquid cooling plate of the battery cell, and the electrical component liquid cooling plate is beneficial to improving the cooling uniformity, thereby further improving the heat exchange effect and enhancing the product performance of the liquid cooling component and battery pack. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram of the structure of a liquid cooling assembly provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the liquid cooling plate on the side wall of the battery cell;

[0025] Figure 3 for Figure 1 Schematic diagram of the liquid cooling plate of the cell electrode column;

[0026] Figure 4 for Figure 1 Schematic diagram of the liquid cooling plate of Zhongzhi Electric Components;

[0027] Figure 5 for Figure 1 Schematic diagram of the inlet and outlet pipes;

[0028] Figure 6 This is a partial structural schematic diagram of a battery pack provided in an embodiment of the present invention.

[0029] The attached figures are labeled as follows:

[0030] Liquid inlet pipe 1, liquid outlet 11, liquid outlet pipe 2, liquid return port 21, liquid cooling plate on the side wall of the battery cell 3, liquid cooling plate on the battery cell electrode post 4, liquid cooling plate on the electrical components 5, battery cell assembly 6, battery cell 61. Detailed Implementation

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0033] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0034] See Figure 1 and Figure 6 In some alternative embodiments, the present invention provides a battery pack including a liquid cooling assembly. In addition to the components mentioned above, the battery pack may also include a battery circuit breaker unit and / or multiple cell groups 6.

[0035] Optionally, the battery disconnect unit includes electrical components. Further, the electrical components include copper busbars.

[0036] Optionally, multiple cell groups 6 are arranged along a first direction, and each cell group 6 includes at least one cell 61. The cell 61 has sidewalls and terminals, and the cell 61 can be a cylindrical cell or a prismatic cell. Further, when the cell 61 is a prismatic cell, the two sides of the prismatic cell distributed along the first direction are the sidewalls with the largest surface area of ​​the prismatic cell. When the cell 61 is a cylindrical cell, each cell group 6 includes multiple cylindrical cells distributed along a second direction.

[0037] In this invention, the second direction is the X direction in the attached drawings, and the height direction of the battery cell 61 is the Z direction in the attached drawings.

[0038] See Figures 1 to 6In some optional embodiments, the liquid cooling assembly provided by this utility model includes an inlet pipe 1, an outlet pipe 2, a cell sidewall liquid cooling plate 3, a cell electrode liquid cooling plate 4, and an electrical component liquid cooling plate 5. The cell sidewall liquid cooling plate 3, the cell electrode liquid cooling plate 4, and the electrical component liquid cooling plate 5 are all internally provided with medium flow channels. The inlet of the medium flow channel of the cell sidewall liquid cooling plate 3 is connected to the inlet pipe 1, and the outlet of the medium flow channel of the cell sidewall liquid cooling plate 3 is connected to the outlet pipe 2. The inlet of the medium flow channel of the cell electrode liquid cooling plate 4 is connected to the inlet pipe 1, and the outlet of the medium flow channel of the cell electrode liquid cooling plate 4 is connected to the outlet pipe 2. The inlet of the medium flow channel of the electrical component liquid cooling plate 5 is connected to the inlet pipe 1, and the outlet of the medium flow channel of the electrical component liquid cooling plate 5 is connected to the outlet pipe 2. Furthermore, the electrical component liquid cooling plate 5, the cell sidewall liquid cooling plate 3, and the cell electrode liquid cooling plate 4 are arranged in parallel.

[0039] Optionally, the inlet pipe 1 includes multiple outlets 11, which are spaced apart along the extension direction of the inlet pipe 1. The multiple outlets 11 are connected in parallel and are respectively connected to the inlet of the medium flow channel of the cell sidewall liquid cooling plate 3, the cell electrode liquid cooling plate 4, and the electrical component liquid cooling plate 5. The outlet pipe 2 includes multiple return ports 21, which are spaced apart along the extension direction of the outlet pipe 2. The multiple return ports 21 are connected in parallel and are respectively connected to the outlet of the medium flow channel of the cell sidewall liquid cooling plate 3, the cell electrode liquid cooling plate 4, and the electrical component liquid cooling plate 5. Furthermore, the cooling medium transported by the inlet pipe 1 is delivered from each outlet 11 to the cell sidewall liquid cooling plate 3, cell terminal liquid cooling plate 4, and electrical component liquid cooling plate 5 connected to each outlet 11, respectively cooling the sidewall of the cell 61, the terminal of the cell 61, and the electrical components. The cooling medium in the cell sidewall liquid cooling plate 3, cell terminal liquid cooling plate 4, and electrical component liquid cooling plate 5 is output from the outlet of the medium channel of the cell sidewall liquid cooling plate 3, cell terminal liquid cooling plate 4, and electrical component liquid cooling plate 5, and flows back to the outlet pipe 2 through the corresponding return port 21, and is output through the outlet pipe 2.

[0040] Optionally, the liquid cooling plate 3 on the side wall of the battery cell includes a serpentine plate, which has a good cooling and heat exchange effect. Especially when the battery cell 61 is a cylindrical battery cell, the use of a serpentine plate is beneficial to increasing the contact area with the side wall of the cylindrical battery cell, thereby improving the heat exchange effect.

[0041] Optionally, the cell terminal liquid cooling plate 4 includes a harmonica tube, which is inexpensive and easy to install and maintain.

[0042] Optionally, the electrical component liquid cooling plate 5 includes a stamped plate.

[0043] In the liquid cooling assembly of the above embodiment, the cell sidewall liquid cooling plate 3, the cell terminal liquid cooling plate 4, and the electrical component liquid cooling plate 5 can respectively cool and exchange heat on the sidewall of the cell 61, the terminal of the cell 61, and the electrical components, resulting in good cooling effect. Moreover, the cell sidewall liquid cooling plate 3, the cell terminal liquid cooling plate 4, and the electrical component liquid cooling plate 5 are arranged in parallel, resulting in uniform cooling. In particular, compared with the series arrangement, the temperature difference of the cooling medium flowing through the cell sidewall liquid cooling plate 3, the cell terminal liquid cooling plate 4, and the electrical component liquid cooling plate 5 is smaller, which is conducive to further improving the cooling effect.

[0044] See Figure 1 and Figure 6 In some alternative embodiments, the electrical components of the battery circuit breaker unit are mounted on the electrical component liquid cooling plate 5.

[0045] Optionally, the electrical component liquid cooling plate 5 is formed as at least part of the housing of the battery circuit breaker unit, which helps to simplify the structure and improve the cooling effect.

[0046] Optionally, the copper busbar of the battery circuit breaker unit is bonded and fixed to the liquid cooling plate 5 of the electrical components.

[0047] In the battery pack of the above embodiment, the electrical components of the battery circuit breaker unit are mounted on the electrical component liquid cooling plate 5. During the charging process, the electrical component liquid cooling plate 5 can cool the electrical components in the battery circuit breaker unit that are generating a lot of heat, which helps to reduce the temperature of the battery circuit breaker unit, avoid overheating of the battery circuit breaker unit, and improve safety performance.

[0048] See Figure 1 and Figure 6 In some alternative embodiments, each cell group 6 has parallel-arranged cell sidewall liquid cooling plates 3 distributed on both sides along the first direction.

[0049] Optionally, the sidewall of the cylindrical cell exchanges heat with the liquid cooling plate 3 on the sidewall of the cell.

[0050] In the battery pack of the above embodiment, liquid cooling plates 3 are arranged on both sides of the cell group 6, which adopts double-sided cooling, resulting in good cooling effect. Moreover, the liquid cooling plates 3 on the side walls of each cell are arranged in parallel, making the cooling more uniform.

[0051] See Figure 1 and Figure 6 In some optional embodiments, there are multiple cell electrode liquid cooling plates 4, which are arranged in parallel and distributed along the first direction. The cell electrode liquid cooling plates 4 contact the electrode of the cell 61 in the cell group 6 for heat exchange, resulting in uniform cooling and good cooling effect.

[0052] In this utility model, the distribution direction of the multiple battery cell groups 6, the distribution direction of the multiple battery cell electrode liquid cooling plates 4, and the distribution direction of the multiple battery cell sidewall liquid cooling plates 3 are the same as the first direction, namely the Y direction in the attached figure.

[0053] See Figure 1 , Figure 5 and Figure 6 In some optional embodiments, the inlet end of the liquid inlet pipe 1 and the outlet end of the liquid outlet pipe 2 are distributed on both sides of the battery pack along the first direction. That is, the inlet end of the liquid inlet pipe 1 and the outlet end of the liquid outlet pipe 2 are arranged on opposite sides, which can realize automatic flow equalization without the need for external redundant pipelines for flow equalization, which is beneficial to simplifying the pipeline structure.

[0054] The liquid cooling assembly and battery pack of this utility model, with the cell sidewall liquid cooling plate 3, cell terminal liquid cooling plate 4, and electrical component liquid cooling plate 5 working together, can cool the sidewall of the cell 61, the terminal of the cell 61, and the electrical components of the battery circuit breaker unit, which are prone to heat generation, respectively. The heat exchange effect is good, which helps to avoid the battery pack temperature from becoming too high. Moreover, the parallel arrangement of the cell sidewall liquid cooling plate 3, cell terminal liquid cooling plate 4, and electrical component liquid cooling plate 5 improves the cooling uniformity, which is conducive to further improving the heat exchange effect, thereby improving the product performance of the liquid cooling assembly and battery pack.

[0055] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A liquid-cooled assembly, comprising: include: Inlet pipe; Discharge tube; A liquid cooling plate for the side wall of the battery cell, wherein the inlet of the liquid cooling plate is connected to the liquid inlet pipe, and the outlet of the liquid cooling plate is connected to the liquid outlet pipe; A liquid cooling plate for battery cell terminals, wherein the inlet of the liquid cooling plate for battery cell terminals is connected to the liquid inlet pipe, and the outlet of the liquid cooling plate for battery cell terminals is connected to the liquid outlet pipe; An electrical component liquid cooling plate is provided, wherein the inlet of the electrical component liquid cooling plate is connected to the liquid inlet pipe, the outlet of the electrical component liquid cooling plate is connected to the liquid outlet pipe, and the electrical component liquid cooling plate, the cell sidewall liquid cooling plate, and the cell electrode liquid cooling plate are arranged in parallel.

2. The liquid-cooling assembly of claim 1, wherein, The liquid inlet pipe includes multiple liquid outlets, which are connected in parallel and respectively connected to the inlets of the liquid cooling plate on the side wall of the battery cell, the liquid cooling plate on the battery cell electrode, and the liquid cooling plate on the electrical components; the liquid outlet pipe includes multiple liquid return ports, which are connected in parallel and respectively connected to the outlets of the liquid cooling plate on the side wall of the battery cell, the liquid cooling plate on the battery cell electrode, and the liquid cooling plate on the electrical components.

3. The liquid-cooling assembly of claim 1, wherein, The liquid cooling plate on the side wall of the battery cell includes a serpentine plate.

4. The liquid-cooling assembly of claim 1, wherein, The cell electrode liquid cooling plate includes a harmonica tube, and the electrical component liquid cooling plate includes a stamped plate.

5. A battery pack, characterized by, Includes the liquid cooling assembly as described in any one of claims 1 to 4.

6. The battery pack of claim 5, wherein, The battery pack also includes a battery circuit breaker unit, which includes electrical components mounted on a liquid cooling plate.

7. The battery pack of claim 6, wherein, The electrical component liquid cooling plate forms at least part of the housing of the battery circuit breaker unit.

8. The battery pack of claim 6, wherein, The electrical component includes a copper busbar, which is bonded and fixed to the liquid cooling plate of the electrical component.

9. The battery pack of claim 6, wherein, The battery pack also includes multiple cell groups, which are arranged along a first direction. Each cell group has parallel-arranged liquid cooling plates on both sides along the first direction.

10. The battery pack according to claim 9, characterized in that, The number of the cell electrode liquid cooling plates is multiple, and the multiple cell electrode liquid cooling plates are arranged in parallel and distributed along the first direction. The cell group includes a cell, and the cell electrode liquid cooling plates contact the electrode of the cell for heat exchange.

11. The battery pack of claim 10, wherein, The battery cell includes a cylindrical battery cell, and each battery cell group includes a plurality of cylindrical battery cells distributed along a second direction. The sidewall of the cylindrical battery cell exchanges heat with the liquid cooling plate on the sidewall of the battery cell.

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