Cooling device for a power battery module of a vehicle and vehicle

Abstract

A cooling device for a power battery module in a vehicle is disclosed. The power battery module has multiple battery cells. The cooling device includes: a heat dissipation component disposed outside each battery cell, with a heat dissipation channel disposed inside the heat dissipation component. The heat dissipation channel has an inlet and an outlet, wherein a cooling medium flows in from the inlet and flows out from the outlet via the heat dissipation channel; a cooling medium inflow pipe, each sub-inlet of which is connected to an inlet for a corresponding battery cell for supplying the cooling medium; and a cooling medium outflow pipe, each sub-outlet of which is connected to an outlet for a corresponding battery cell for recirculation of the cooling medium. This application also relates to a vehicle including the above-described power battery module and corresponding cooling device.

Description

Technical Field

[0001] This application relates to the field of power batteries, and more particularly to a cooling device for a power battery module used in a vehicle, a method for manufacturing the cooling device, and a corresponding vehicle. Background Technology

[0002] With the rapid development of new energy vehicles, lithium-ion power batteries, which are their power source, have also entered a period of rapid development, and battery cooling is a very important part of this process.

[0003] Currently, the cooling technology for power batteries usually adopts serial cooling, which means that the coolant flows through multiple cells of the battery pack from the inlet to the outlet. The disadvantage of this approach is that when the coolant flows to the cell at the end of the cooling circuit, it has already absorbed the heat from the cells at the front, resulting in an unexpected temperature difference distribution between the cells in the battery pack.

[0004] In addition, differences in the spatial arrangement of battery cells within the high-voltage battery pack and the differences in heat dissipation conditions at their locations will further exacerbate the temperature imbalance between battery cells.

[0005] Therefore, in order to achieve parallel cooling for individual battery cells, it is desirable to design a cooling device for vehicle power battery modules that can effectively avoid performance degradation of the battery pack caused by temperature imbalance, and improve the battery pack's lifespan and safety. Summary of the Invention

[0006] This summary is provided to introduce, in a simplified form, some concepts that will be further described in the following detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0007] To address the above problems, according to a first aspect of the present invention, a cooling device for a power battery module for a vehicle is provided, the power battery module having a plurality of cells, the cooling device comprising: a heat dissipation component disposed outside each of the plurality of cells, a heat dissipation channel disposed inside the heat dissipation component, the heat dissipation channel having an inlet and an outlet, wherein a cooling medium flows in from the inlet and flows out from the outlet via the heat dissipation channel; a cooling medium inflow pipe, each sub-inlet of the cooling medium inflow pipe being connected to an inlet for a corresponding cell for supplying the cooling medium; and a cooling medium outflow pipe, each sub-outlet of the cooling medium outflow pipe being connected to an outlet (110) for a corresponding cell for recirculation of the cooling medium.

[0008] In the technical solution of this invention, by designing a cooling device for parallel cooling of individual battery cells, the performance degradation of the battery pack caused by temperature imbalance can be effectively avoided, thereby improving the lifespan and safety of the battery pack.

[0009] According to one embodiment of the present invention, the cooling device further includes: a flow control device disposed on the side of the liquid inlet of the heat dissipation component for each battery cell, the flow control device being configured to control the flow rate of the cooling medium flowing into the corresponding heat dissipation channel to achieve a uniform temperature distribution among the battery cells.

[0010] In the technical solution of this invention, by controlling the coolant flow rate for individual cells, a more uniform cell temperature distribution can be achieved by compensating for the heat dissipation differences of each cell.

[0011] According to a further embodiment of the present invention, the flow control device for each cell is further configured to control the flow rate of the cooling medium flowing into the heat dissipation channel for the respective cell in a manner that compensates for the heat dissipation differences between the cells caused by the battery topology.

[0012] According to a further embodiment of the present invention, a flow control device for each battery cell is communicatively connected to a control unit, the control unit being communicatively connected to a temperature sensor for each battery cell to obtain the temperature distribution between the battery cells, wherein the flow control device adjusts the flow rate for the corresponding battery cell based on the temperature distribution between the battery cells obtained from the control unit to compensate for the heat dissipation differences between the battery cells.

[0013] According to a further embodiment of the present invention, the heat dissipation component is directly sleeved on the outside of the corresponding battery cell and completely surrounds the battery cell, and the heat dissipation channel provided inside the heat dissipation component is arranged around the corresponding battery cell, and the liquid inlet and the liquid outlet are respectively provided at one end or both ends of the corresponding battery cell.

[0014] According to a further embodiment of the present invention, the heat dissipation channel is arranged axially, radially, or partially axially and partially radially around the corresponding battery cell.

[0015] According to a further embodiment of the present invention, the heat dissipation channel is arranged around all or part of the corresponding battery cell.

[0016] According to a further embodiment of the present invention, the heat dissipation component further includes an electrical isolation layer, the heat dissipation channel being embedded in the electrical isolation layer and combined with the housing body of the heat dissipation component.

[0017] According to a second aspect of the present invention, a method for manufacturing a cooling device for a power battery module for a vehicle is provided, the power battery module having a plurality of battery cells, the method comprising: forming a heat dissipation component outside each of the plurality of battery cells; forming a heat dissipation channel inside the heat dissipation component, the heat dissipation channel having an inlet and an outlet, wherein a cooling medium flows in from the inlet and flows out from the outlet via the heat dissipation channel; forming a cooling medium inflow pipe, each sub-inlet of the cooling medium inflow pipe being connected to an inlet for a corresponding battery cell for supplying the cooling medium; and forming a cooling medium outflow pipe, each sub-outlet of the cooling medium outflow pipe being connected to an outlet for a corresponding battery cell for recirculation of the cooling medium.

[0018] According to one embodiment of the present invention, the method further includes: forming a flow control device on the side of the liquid inlet of the heat dissipation component for each battery cell, the flow control device being configured to control the flow rate of the cooling medium flowing into the corresponding heat dissipation channel to achieve a uniform temperature distribution among the battery cells.

[0019] According to a further embodiment of the present invention, the flow control device is further configured to control the flow rate of the cooling medium flowing into the heat dissipation channel for the respective cell in a manner that compensates for the heat dissipation differences between the cells due to the battery topology.

[0020] According to a further embodiment of the present invention, the flow control device is communicatively connected to a control unit, the control unit being communicatively connected to a temperature sensor for each battery cell to obtain the temperature distribution between the battery cells, wherein the flow control device adjusts the flow rate for the corresponding battery cell based on the temperature distribution between the battery cells obtained from the control unit to compensate for the heat dissipation differences between the battery cells.

[0021] According to a further embodiment of the present invention, forming a heat dissipation component outside each of the plurality of battery cells further includes: directly sleeved the heat dissipation component on the outside of the corresponding battery cell and completely surrounding the battery cell, a heat dissipation channel disposed inside the heat dissipation component surrounding the corresponding battery cell, and the liquid inlet and the liquid outlet being disposed at one end or both ends of the corresponding battery cell, respectively.

[0022] According to a third aspect of the invention, a vehicle is provided comprising a power battery module and a corresponding cooling device as described in any of the preceding aspects.

[0023] To address the issues of uneven temperature and heat dissipation differences in existing technologies, this invention designs a cooling device for vehicle power battery modules. This device can perform parallel cooling on individual battery cells, thereby effectively avoiding performance degradation caused by uneven temperature, improving battery life and safety. In addition, it can also control the coolant flow rate on individual battery cells to compensate for the heat dissipation differences of each cell and achieve a more uniform cell temperature distribution.

[0024] These and other features and advantages will become apparent from the following detailed description and with reference to the accompanying drawings. It should be understood that the foregoing general description and the following detailed description are illustrative only and do not limit the scope of the claims. Attached Figure Description

[0025] To gain a more detailed understanding of the manner in which the features of this disclosure are described above, reference can be made to the various embodiments for a more specific description of the above-briefly summarized aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as this description may allow for other equivalent and effective aspects.

[0026] Figure 1 A schematic architectural diagram of a cooling device 100 for a power battery module of a vehicle according to an embodiment of the present disclosure is shown.

[0027] Figure 2 A schematic diagram showing an example construction of a cooling channel according to an embodiment of the present disclosure is provided.

[0028] Figure 3 A schematic flowchart illustrates a method for manufacturing a cooling device for a power battery module for a vehicle according to an embodiment of the present disclosure.

[0029] Figure 4 An example vehicle is shown that includes a cooling device according to one embodiment of the present disclosure. Detailed Implementation

[0030] The following detailed description is sufficient to enable any person skilled in the art to understand the technical content of one or more embodiments of this specification and to implement them accordingly. Furthermore, based on the specification, claims, and drawings disclosed herein, those skilled in the art can easily understand the objects and advantages associated with one or more embodiments of this specification. Throughout this specification, the term "vehicle" refers to any type of automobile, including but not limited to cars, vans, trucks, buses, etc. For simplicity, the invention is described in relation to "automobile." The terms "A or B" as used in this specification mean "A and B" and "A or B," and do not imply that A and B are exclusive unless otherwise stated.

[0031] As mentioned above, current vehicle power battery cooling technology typically employs series cooling, where the coolant flows through multiple cells of the battery pack from the inlet to the outlet. This results in temperature differences between the cells during the cooling process. Furthermore, current battery pack cooling technologies do not consider the heat dissipation differences related to the battery topology between cells, leading to further temperature differences between the cells during cooling.

[0032] To address this issue, embodiments of this specification envision a cooling device that performs parallel cooling on individual battery cells. This effectively prevents performance degradation of the battery pack caused by temperature imbalances, thereby improving the battery pack's lifespan and safety. Furthermore, the cooling device designed in this application can also control the coolant flow rate for individual battery cells to compensate for differences in heat dissipation among cells, achieving a more uniform cell temperature distribution.

[0033] As the core component of a power battery, the battery cell is the basic unit for storing energy in a battery system, determining core performance characteristics such as energy density, power performance, safety, and lifespan. Structurally, battery cells are mainly divided into three types: cylindrical, prismatic, and pouch cells. The following explanation uses a cylindrical battery cell as an example; however, it should be understood that the cage design of this invention is not limited to cylindrical battery cells.

[0034] For example, see Figure 1 The diagram shows a schematic architecture of a cooling device 100 for a power battery module of a vehicle according to an embodiment of the present disclosure.

[0035] like Figure 1 As shown, the power battery module may have multiple cells (e.g., cylindrical cells) 102. The cooling device 100 may include a heat dissipation component 104 disposed outside each of the multiple cells 102, and a heat dissipation channel 106 disposed inside the heat dissipation component 104. The heat dissipation channel 106 has an inlet 108 and an outlet 110, wherein the cooling medium flows in from the inlet 108 and flows out from the outlet 110 through the heat dissipation channel 106.

[0036] Furthermore, the cooling device 100 may also include a cooling medium inflow pipe 112 and a cooling medium outflow pipe 114, wherein each sub-inlet 114 of the cooling medium inflow pipe 112 is connected to the liquid inlet 108 of the corresponding battery cell 102 for supplying the cooling medium, and each sub-outlet 118 of the cooling medium outflow pipe 116 is connected to the liquid outlet 110 of the corresponding battery cell 102 for returning the cooling medium.

[0037] In one embodiment, the cooling medium may be a hot fluid, preferably liquid water or an aqueous solution of ethylene glycol.

[0038] Of course, it can be understood that the cooling medium can also be any other suitable heat transfer medium known to those skilled in the art.

[0039] More preferably, the cooling device 100 may further include a flow control device 120 disposed on one side of the liquid inlet 108 of the heat dissipation component 104 for each cell 102. The flow control device 120 may be configured to control the flow rate of the cooling medium flowing into the corresponding heat dissipation channel 106 to achieve a uniform temperature distribution among the cells.

[0040] In one embodiment, the flow control device 120 for each cell 102 is further configured to control the flow rate of the cooling medium flowing into the heat dissipation channel 106 for the respective cell 102 in a manner that compensates for the heat dissipation differences between the cells due to the battery topology.

[0041] In a further embodiment, a flow control device 120 for each cell 102 is communicatively connected to a control unit, which is communicatively connected to a temperature sensor for each cell to obtain the temperature distribution between the cells. The flow control device 120 can adjust the flow rate for the corresponding cell 102 based on the temperature distribution between the cells obtained from the control unit to compensate for the heat dissipation differences between the cells.

[0042] In one embodiment, the heat dissipation component 104 can be directly sleeved on the outside of the corresponding battery cell 102 and completely surround the battery cell 102. The heat dissipation channel 106 provided inside the heat dissipation component 104 can be arranged around the corresponding battery cell 102. The liquid inlet 108 and the liquid outlet 110 can be respectively provided at one end or both ends of the corresponding battery cell 102. At the same time, the cooling device 100 can also serve to fix the battery cell, provide mechanical support, and transmit mechanical load.

[0043] The arrangement of heat dissipation components and heat dissipation channels is described in further detail below.

[0044] According to one design, a heat dissipation channel 106 is axially arranged around the corresponding battery cell, and the extension direction of the heat dissipation channel 106 is parallel to the extension direction of the central axis of the cylindrical battery cell. The liquid inlet 108 and the liquid outlet 110 are respectively arranged at both ends of the corresponding battery cell.

[0045] In this configuration, the cooling medium inlet and outlet pipes of the battery module can be connected to the inlet and outlet of the cooling channel, respectively, for the supply and return of the cooling medium (e.g., a hot fluid). The cooling medium then flows in from the inlet and out from the outlet via the cooling channel, thereby carrying away the heat generated by the battery cell through thermal conduction.

[0046] According to another design, the heat dissipation channel 106 is arranged radially around the corresponding battery cell, and both the liquid inlet 108 and the liquid outlet 110 are located at one end of the corresponding battery cell.

[0047] In this configuration, the cooling medium inlet and outlet pipes of the battery module can be connected to the inlet and outlet of the heat dissipation channel for the circulation of the cooling medium. The cooling medium then flows in from the inlet and out from the outlet via the cooling channel to achieve efficient heat dissipation of the battery cell.

[0048] According to another design, the heat dissipation channel 106 is arranged axially and radially around the corresponding battery cell, and both the liquid inlet 108 and the liquid outlet 110 are located at one end of the corresponding battery cell.

[0049] In this configuration, the cooling medium inlet and outlet pipes of the battery module can be connected to the inlet and outlet of the heat dissipation channel for the circulation of the cooling medium. The cooling medium then flows in from the inlet and out from the outlet via the cooling channel to achieve 360-degree parallel cooling for individual battery cells.

[0050] It is understood that the location and structure of the heat dissipation channel 106 described above are merely illustrative, and it can be set and constructed in any other suitable manner.

[0051] In one implementation, the heat dissipation component can be implemented as a fully tubular structure.

[0052] In one embodiment, the heat dissipation channel 106 may be arranged around all or part of the corresponding battery cell. The design of the cooling channel partially surrounding the battery cell can reduce the weight of the cooling device, save materials, and simplify the manufacturing process, making it suitable for applications that require batteries to have both high performance and lightweight design.

[0053] According to another design construction, such as Figure 2 As shown in 200, the heat dissipation component 104 may further include an electrical isolation layer 202, and the heat dissipation channel 106 may be embedded in the electrical isolation layer 202 and combined with the housing body 204 of the heat dissipation component 104.

[0054] The electrical isolation layer 202 may be made of, for example, a plastic material with good insulation and thermal conductivity, which can conduct heat while preventing current from passing through.

[0055] It can be seen that the electrical isolation layer has both electrical isolation and heat conduction functions. Electrical isolation can effectively prevent direct electrical contact between battery cells, thereby reducing the risk of short circuit. At the same time, its surface can be designed as grooves or channels of any shape and combined with the housing body 204 to form a heat dissipation channel, guide the coolant and conduct heat, and help the battery cells cool effectively. The housing body 204 can be other closed or open cooling structures.

[0056] Figure 3 A schematic flowchart of a method 300 for manufacturing a cooling device for a power battery module for a vehicle according to an embodiment of the present disclosure is shown, wherein the power battery module has a plurality of cells.

[0057] Method 300 begins at step 302, where a heat dissipation component is formed on the exterior of each of the plurality of cells.

[0058] In step 304, a heat dissipation channel is formed inside the heat dissipation component. The heat dissipation channel has an inlet and an outlet, wherein the cooling medium flows in from the inlet and flows out from the outlet through the heat dissipation channel.

[0059] In one design, a heat dissipation component can be directly fitted onto the outside of the corresponding battery cell, completely surrounding it. A heat dissipation channel, located inside the heat dissipation component, surrounds the battery cell. The liquid inlet and outlet can be located at one or both ends of the battery cell, respectively. Alternatively, the heat dissipation channel can also surround all or part of the battery cell.

[0060] Preferably, the cooling medium can be a hot fluid, preferably liquid water or an aqueous solution of ethylene glycol.

[0061] In step 306, a cooling medium inflow pipe is formed, and each sub-inlet of the cooling medium inflow pipe is connected to the liquid inlet for the corresponding battery cell for supplying cooling medium.

[0062] In step 308, a cooling medium outflow pipe is formed, and each sub-outlet of the cooling medium outflow pipe is connected to the liquid outlet for the corresponding battery cell for the return of the cooling medium.

[0063] Furthermore, a flow control device can be formed on the side of the liquid inlet of the heat dissipation component for each cell. This flow control device is configured to control the flow rate of the cooling medium flowing into the corresponding heat dissipation channel to achieve a uniform temperature distribution among the cells.

[0064] Furthermore, the flow control device is further configured to control the flow rate of the cooling medium flowing into the heat dissipation channel for the corresponding cell in a manner that compensates for the heat dissipation differences between the cells caused by the battery topology.

[0065] More preferably, the flow control device can be communicatively connected to a control unit, which can be communicatively connected to a temperature sensor for each cell to obtain the temperature distribution between the cells. The flow control device can adjust the flow rate for the corresponding cell based on the temperature distribution between the cells obtained from the control unit to compensate for the heat dissipation differences between the cells.

[0066] In one embodiment of the present invention, a plurality of cylindrical single-cell batteries (i.e., cylindrical cells) fitted with the aforementioned heat dissipation components can be assembled together to form a battery module. The battery module contains two or more cylindrical cells fitted with heat dissipation components, the specific number depending on the application of the battery module and the parameters of the individual battery module.

[0067] For example, in a battery module, multiple battery cells equipped with heat dissipation components can be arranged sequentially along the length of the battery module. Of course, they can also be arranged in any other manner. Furthermore, these multiple battery cells can be secured to the heat dissipation components using fasteners.

[0068] In a further embodiment, the battery module includes a battery housing, and the battery module is fixed inside the battery housing.

[0069] In one embodiment of this application, two or more of the aforementioned battery modules can be assembled into a battery pack. The number of battery modules contained in the battery pack depends on the application of the battery pack and the parameters of individual battery modules. The battery pack may include a battery box and multiple battery modules disposed within the battery box. The battery box includes an upper box and a lower box, the upper box being able to cover and fit snugly onto the lower box, forming a closed space for accommodating the battery modules. Two or more battery modules can be arranged in the battery box in a desired manner.

[0070] Figure 4 An example vehicle 500 including a cooling device according to this application is shown. The vehicle may include, but is not limited to, pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, etc. Currently, passenger vehicle power batteries are mostly single-pack systems (i.e., battery packs), which use assembly technology to integrate battery cells into battery packs, mainly involving structure, thermal management, electrical connection design, and BMS technology. Assembly technology may include, for example, MTP, CTP, CTC, CTB, or MTP. For example, MTP technology refers to first integrating cells into modules, and then integrating modules into a pack. The core of MTP assembly technology lies in module design; a module generally consists of a frame (end plate, side plate, base plate), cells, high and low voltage electrical connection components, CCS components, insulation and buffer components. CTP technology refers to the technology of directly integrating cells into a pack.

[0071] By utilizing the aforementioned parallel cooling technology and considering the heat dissipation differences caused by the battery topology between individual cells, a heat dissipation component can be arranged outside each cell. Inside this component, a heat dissipation channel is provided, having an inlet and an outlet. These inlets and outlets are respectively connected to sub-inlets of a cooling medium inflow pipe and sub-outlets of a cooling medium outflow pipe, allowing the cooling medium to flow in parallel from each inlet and out through the corresponding heat dissipation channel from each outlet. Furthermore, coolant flow control can be implemented for individual cells. For example, a flow control device can be installed on the inlet side of the heat dissipation component for each cell, configured to control the flow rate of the cooling medium flowing into the corresponding heat dissipation channel to achieve a uniform temperature distribution among the cells.

[0072] The foregoing description includes examples of various aspects of the claimed subject matter. It is certainly impossible to describe every conceivable combination of components or methods for the purpose of depicting the claimed subject matter, but those skilled in the art will recognize that many further combinations and arrangements of the claimed subject matter are possible. Thus, the disclosed subject matter is intended to cover all such changes, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. A cooling device (100) for a power battery module in a vehicle, the power battery module having a plurality of cells (102), the cooling device comprising: A heat dissipation component (104) is arranged outside each of the plurality of battery cells (102). A heat dissipation channel (106) is provided inside the heat dissipation component (104). The heat dissipation channel (106) has a liquid inlet (108) and a liquid outlet (110). Cooling medium flows in from the liquid inlet (108) and flows out from the liquid outlet (110) through the heat dissipation channel (106). A cooling medium inflow pipe (112) is provided, and each sub-inlet (114) of the cooling medium inflow pipe (112) is connected to a liquid inlet (108) for a corresponding battery cell (102) for supplying the cooling medium; and A cooling medium outlet pipe (116) is provided, and each sub-outlet (118) of the cooling medium outlet pipe (116) is connected to the liquid outlet (110) of the corresponding battery cell (102) for the return of the cooling medium.

2. The cooling device (100) as claimed in claim 1, wherein the cooling device (100) further comprises: A flow control device (120) is provided on one side of the liquid inlet (108) of the heat dissipation component (104) for each cell (102), the flow control device (120) being configured to control the flow rate of the cooling medium flowing into the corresponding heat dissipation channel (106) to achieve a uniform temperature distribution among the cells.

3. The cooling device (100) as claimed in claim 2, wherein the flow control device (120) for each cell (102) is further configured to control the flow rate of the cooling medium flowing into the heat dissipation channel (106) for the respective cell (102) in a manner that compensates for the heat dissipation differences between the cells due to the battery topology.

4. The cooling device (100) as claimed in claim 3, wherein a flow control device (120) for each cell (102) is communicatively connected to a control unit, the control unit being communicatively connected to a temperature sensor for each cell to obtain the temperature distribution between the cells, wherein The flow control device (120) adjusts the flow rate of the corresponding cell (102) according to the temperature distribution between the cells obtained from the control unit to compensate for the heat dissipation differences between the cells.

5. The cooling device (100) as claimed in claim 1, wherein the cooling medium is a hot fluid.

6. The cooling device (100) as claimed in claim 1, wherein the heat dissipation component (104) is directly sleeved on the outside of the corresponding battery cell (102) and completely surrounds the battery cell (102), and the heat dissipation channel (106) provided inside the heat dissipation component (104) surrounds the corresponding battery cell (102), and the liquid inlet (108) and the liquid outlet (110) are respectively provided at one end or both ends of the corresponding battery cell (102).

7. The cooling device (100) as claimed in claim 6, wherein the heat dissipation channel (106) is arranged axially, radially, or partially axially and partially radially around the respective cell (102).

8. The cooling device (100) as claimed in claim 6, wherein the heat dissipation channel (106) is arranged around all or part of the respective battery cell (102).

9. The cooling device (100) of claim 6, wherein the heat dissipation component (104) further includes an electrical isolation layer, the heat dissipation channel (106) being embedded in the electrical isolation layer and combined with the housing body of the heat dissipation component (104).

10. A method for manufacturing a cooling device (100) for a power battery module for a vehicle, the power battery module having a plurality of cells (102), the method comprising: A heat dissipation component (104) is formed on the exterior of each of the plurality of battery cells (102); A heat dissipation channel (106) is formed inside the heat dissipation component (104). The heat dissipation channel (106) has an inlet (108) and an outlet (110), wherein the cooling medium flows in from the inlet (108) and flows out from the outlet (110) via the heat dissipation channel (106). A cooling medium inflow pipe (112) is formed, and each sub-inlet (114) of the cooling medium inflow pipe (112) is connected to a liquid inlet (108) for a corresponding battery cell (102) for supplying the cooling medium; and A cooling medium outflow pipe (116) is formed, and each sub-outlet (118) of the cooling medium outflow pipe (116) is connected to the liquid outlet (110) of the corresponding battery cell (102) for the return of the cooling medium.

11. The method of claim 10, further comprising: A flow control device (120) is formed on the side of the liquid inlet (108) of the heat dissipation component (104) for each cell (102), the flow control device (120) being configured to control the flow rate of the cooling medium flowing into the corresponding heat dissipation channel (106) to achieve a uniform temperature distribution among the cells.

12. The method of claim 11, wherein the flow control device (120) is further configured to control the flow rate of the cooling medium flowing into the heat dissipation channel (106) for the respective cell (102) in a manner that compensates for the differences in heat dissipation between the cells due to the battery topology.

13. The method of claim 12, wherein the flow control device (120) is communicatively connected to a control unit, the control unit being communicatively connected to a temperature sensor for each cell to obtain the temperature distribution between the cells, wherein The flow control device (120) adjusts the flow rate of the corresponding cell (102) according to the temperature distribution between the cells obtained from the control unit to compensate for the heat dissipation differences between the cells.

14. The method of claim 10, wherein forming a heat dissipation component (104) on the exterior of each of the plurality of battery cells (102) further comprises: The heat dissipation component (104) is directly sleeved on the outside of the corresponding battery cell (102) and completely surrounds the battery cell (102). The heat dissipation channel inside the heat dissipation component (104) is arranged around the corresponding battery cell (102). The liquid inlet (108) and the liquid outlet (110) are respectively arranged at one end or both ends of the corresponding battery cell (102).

15. A vehicle comprising a power battery module and a corresponding cooling device (100) as described in any one of claims 1-9.

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