Cold plate assembly, flow control method, battery pack and vehicle

Abstract

The invention relates to a cold plate assembly, a flow control method, a battery pack and a vehicle, relates to the technical field of batteries, and at least solves the technical problem of inaccurate temperature control of a battery cell module in related technologies. The cold plate assembly comprises a first cold plate (10), a second cold plate (20) and a third cold plate (30), a first cooling flow channel (101) is formed in the first cold plate (10), and a first inlet (102) and a first outlet (103) are formed in the two ends of the first cooling flow channel (101) respectively; the second cold plate (20) is arranged on one side of the first cold plate (10) in a stacked mode to form a second cooling flow channel (201), and a second inlet (202) and a second outlet (203) are formed in the two ends of the second cooling flow channel (201) respectively; the first cooling flow channel (101) comprises a first flow channel part (104), and the second cooling flow channel (201) comprises a second flow channel part (204); and the second runner part (204) is arranged around the first runner part (104) so as to accurately control the temperature of the battery cell module.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cold plate assembly, a flow control method, a battery pack, and a vehicle. Background Art

[0002] The cell module is the primary component of a battery responsible for storing and releasing electrical energy. During the battery's charge and discharge process, chemical reactions occur within the cell module, generating heat. Excessive heat generated by the cell module can affect the battery's electrochemical performance, reducing charge and discharge efficiency.

[0003] One prior art provides a double-layer cold plate structure for a battery cell module. This structure consists of a bottom plate assembly and a top plate assembly spaced apart from each other. A first return channel is formed between the bottom cooling plate of the bottom plate assembly and the bottom shell, and a second return channel is formed between the top cooling plate of the top plate assembly and the cover plate. The two channels are connected by a lower water inlet pipe, a lower water outlet pipe, and an upper water inlet pipe, an upper water outlet pipe, respectively, to achieve temperature control of the battery cell module. Another prior art provides a flow distribution method for a flow distribution liquid cold plate. This method adjusts the flow of the liquid cold plate based on the temperature difference within the battery pack and the temperature of the battery cells to achieve temperature control of the battery cell module.

[0004] Although the above method can reduce the temperature of the battery cell module, the above method does not accurately control the temperature of the battery cell module, which may affect the performance of the battery cell module. Summary of the Invention

[0005] According to the first aspect provided by the present application, the present application provides a cold plate assembly, a flow control method, a battery pack and a vehicle, so as to at least solve the technical problem of inaccurate temperature control of the battery cell module in the related art.

[0006] The technical solution of the present application is applied to a cold plate assembly. The cold plate assembly includes: a first cold plate, which is formed with a first cooling channel, and the two ends of the first cooling channel respectively have a first inlet and a first outlet. And, a second cold plate, which is stacked on one side of the first cold plate, is formed with a second cooling channel. The two ends of the second cooling channel respectively have a second inlet and a second outlet. The first cooling channel includes a first channel portion, and the second cooling channel includes a second channel portion. The orthographic projection of the second channel portion on the first cold plate is located on the periphery of the first channel portion and is arranged around the first channel portion.

[0007] In one possible implementation, the first cooling channel further includes a third channel portion. The third channel portion is located outside the first channel portion and surrounds the first channel portion. The second cooling channel further includes a fourth channel portion, and the second channel portion is located outside the fourth channel portion and surrounds the fourth channel portion.

[0008] In one possible implementation, a first protrusion is provided on the side of the first cold plate facing the second cold plate, and a first cooling channel is recessed from the surface of the first cold plate away from the second cold plate into the first protrusion. A second protrusion is provided on the side of the second cold plate facing the first cold plate, and a second cooling channel is recessed from the surface of the second cold plate away from the first cold plate into the second protrusion.

[0009] In a possible implementation, along a first direction, a depth of the first flow channel portion is greater than a depth of the third flow channel portion. The first direction is parallel to a stacking direction of the first cold plate and the second cold plate.

[0010] In one possible implementation, the first cooling channel includes multiple first channel segments arranged along a second direction, and the second cooling channel includes multiple second channel segments arranged along the second direction. The second direction is perpendicular to the first direction and parallel to the first cold plate, and the first direction is parallel to the stacking direction of the first and second cold plates. One first channel segment corresponds to one second channel segment, and the spacing between one first channel segment and one second channel segment is a first spacing, with any two first spacings being equal.

[0011] In a possible implementation, the cold plate assembly further includes: a sealing thermally conductive adhesive filled between the first cold plate and the second cold plate.

[0012] In a possible implementation, the cold plate assembly further includes: a connector, which is provided around the first cooling channel and the second cooling channel, and is connected between the first cold plate and the second cold plate.

[0013] According to a second aspect of the present application, a flow control method is provided, which is applied to a cold plate assembly as described in the first aspect. The flow control method includes: obtaining a regional temperature of a battery cell module, the battery cell modules being stacked on one side of the cold plate assembly. Based on the regional temperature of the battery cell module and a preset temperature condition, controlling the liquid flow of a first cold plate in the cold plate assembly and / or the liquid flow of a second cold plate in the cold plate assembly.

[0014] In one possible implementation, the regional temperature of the battery cell module includes temperatures of multiple regions of the battery cell module, and the preset temperature condition includes at least one of the following: a temperature of any one of the multiple regions is greater than or equal to a first preset temperature threshold; a temperature of any one of the multiple regions is less than or equal to a second preset temperature threshold; and a regional temperature difference is greater than or equal to a preset temperature difference threshold, where the regional temperature difference is the difference between the temperatures of any two regions in the multiple regions.

[0015] In one possible implementation, the multiple regions include: a peripheral region of the cell module, a central region of the cell module, and a transition region, wherein the transition region is the region between the peripheral region and the central region. The peripheral region corresponds to a region near the peripheral portion of the first flow channel portion, the central region corresponds to a region near the central portion of the second flow channel portion, and the transition region corresponds to a region near the central portion of the first flow channel portion and a region near the peripheral portion of the second flow channel portion. Based on the regional temperature of the cell module and a preset temperature condition, controlling the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly includes: increasing the liquid flow of the first cold plate when the temperature of the central region is greater than or equal to a first preset temperature threshold, or when the temperature of the central region is less than or equal to a second preset temperature threshold. Increasing the liquid flow of the second cold plate when the temperature of the peripheral region is greater than or equal to the first preset temperature threshold, or when the temperature of the peripheral region is less than or equal to the second preset temperature threshold. When the temperature of the transition area is greater than or equal to a first preset temperature threshold, or when the temperature of the transition area is less than or equal to a second preset temperature threshold, a temperature change trend of the transition area is obtained, and the liquid flow rate of the first cold plate and / or the liquid flow rate of the second cold plate is increased based on the temperature change trend of the transition area.

[0016] According to a third aspect of the present application, a flow control device is provided, comprising an acquisition module and a control module. The acquisition module is configured to acquire a regional temperature of a battery cell module, the battery cell module being stacked on one side of a cold plate assembly. The control module is configured to control the liquid flow of a first cold plate in the cold plate assembly and / or the liquid flow of a second cold plate in the cold plate assembly based on the regional temperature of the battery cell module and a preset temperature condition.

[0017] In one possible implementation, the regional temperature of the battery cell module includes temperatures of multiple regions of the battery cell module, and the preset temperature condition includes at least one of the following: a temperature of any one of the multiple regions is greater than or equal to a first preset temperature threshold; a temperature of any one of the multiple regions is less than or equal to a second preset temperature threshold; and a regional temperature difference is greater than or equal to a preset temperature difference threshold, where the regional temperature difference is the difference between the temperatures of any two regions in the multiple regions.

[0018] In one possible implementation, the multiple regions include: a peripheral region of the cell module, a central region of the cell module, and a transition region, with the transition region being the region between the peripheral region and the central region. The peripheral region corresponds to a region of the first flow channel portion near the peripheral portion, the central region corresponds to a region of the second flow channel portion near the central portion, and the transition region corresponds to a region of the first flow channel portion near the central portion and a region of the second flow channel portion near the peripheral portion. The control module is configured to increase the liquid flow rate of the first cold plate when the temperature of the central region is greater than or equal to a first preset temperature threshold or when the temperature of the central region is less than or equal to a second preset temperature threshold. The control module is further configured to increase the liquid flow rate of the second cold plate when the temperature of the peripheral region is greater than or equal to the first preset temperature threshold or when the temperature of the peripheral region is less than or equal to the second preset temperature threshold. The control module is further configured to obtain a temperature change trend of the transition region when the temperature of the transition region is greater than or equal to the first preset temperature threshold or when the temperature of the transition region is less than or equal to the second preset temperature threshold, and increase the liquid flow rate of the first cold plate and / or the liquid flow rate of the second cold plate based on the temperature change trend of the transition region.

[0019] According to the fourth aspect provided by the present application, a flow control device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement a method as in the second aspect and any possible implementation method thereof.

[0020] According to a fifth aspect of the present application, a battery pack is provided, comprising: a cold plate assembly according to the first aspect, and a battery cell module, wherein the cold plate assembly and the battery cell module are stacked.

[0021] According to the sixth aspect provided by the present application, a vehicle is provided, the vehicle including the battery pack as in the fifth aspect, and the vehicle is used to implement the method as in the second aspect and any possible implementation manner thereof.

[0022] According to the seventh aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of the flow control device, the flow control device is able to execute the method of the second aspect and any possible implementation method thereof.

[0023] According to the eighth aspect provided by the present application, a computer program product is provided, which includes computer instructions. When the computer instructions are executed on a flow control device, the flow control device is configured as in the second aspect and any possible implementation method thereof.

[0024] Beneficial effects of the present invention:

[0025] (1) The present application provides a first inlet 102 and a first outlet 103 at both ends of the first cooling channel 101, and provides a second inlet 202 and a second outlet 203 at both ends of the second cooling channel 201, thereby enabling the flow of the first cold plate 10 and the second cold plate 20 to be controlled individually. In this way, by equipping the first cold plate 10 and the second cold plate 20 with independent inlets and outlets, respectively, the flow distribution of each cold plate can be controlled individually. Furthermore, the flow of the first cold plate 10 and the second cold plate 20 can be flexibly adjusted according to the actual temperature requirements of the battery cell module, thereby enabling the temperature of the battery cell module to be controlled more accurately.

[0026] (2) The third flow channel portion 105 is located outside the first flow channel portion 104, and can assist the second region in controlling the peripheral temperature of the first flow channel portion 104, thereby preventing heat from being retained in the edge region. The second flow channel portion 204 is located outside the fourth flow channel portion 205, and can assist the first flow channel portion 104 in controlling the temperature of the first flow channel portion 104, thereby preventing heat from being retained in the first flow channel portion 104. In this way, the space of the cold plate assembly can be fully utilized, and the cooling capacity of the cold plate assembly can be enhanced.

[0027] (3) A first protruding structure is provided on the side of the first cold plate 10 facing the second cold plate 20, and the first cooling channel 101 is recessed from the surface of the first cold plate 10 away from the second cold plate 20 into the first protruding structure, which can improve the heat exchange efficiency of the first cooling channel 101, so that the first cold plate 10 can transfer heat faster. A second protruding structure is provided on the side of the second cold plate 20 facing the first cold plate 10, and the second cooling channel 201 is recessed from the surface of the second cold plate 20 away from the first cold plate 10 into the second protruding structure, which can improve the heat exchange efficiency of the second cooling channel 201, so that the second cold plate 20 can transfer heat faster. Furthermore, the contact area between the cold plate assembly and the battery cell module can be increased, so that the cold plate assembly can control the temperature of the battery cell module more quickly.

[0028] (4) Along the first direction, the depth of the first flow channel portion 104 is greater than the depth of the third flow channel portion 105, so that the liquid flow rate through the higher temperature area is larger and the liquid flow rate through the lower temperature area is smaller, thereby making the temperature distribution of each area of ​​the battery cell module more uniform.

[0029] (5) A first flow channel segment corresponds to a second flow channel segment, and the spacing between a first flow channel segment and a second flow channel segment is a first spacing. Any two first spacings are equal, which can make the surface temperature distribution of the cooling component consistent, thereby extending the life of the battery cell module. Furthermore, the overall cooling rate of the cooling component can be accelerated.

[0030] (6) The sealing thermal conductive adhesive 30 is filled between the first cold plate 10 and the second cold plate 20 , which can seal the first cold plate 10 and the second cold plate 20 and improve the heat conduction efficiency between the first cold plate 10 and the second cold plate 20 .

[0031] (7) The connector 40 is provided on the peripheral side of the first cooling channel 101 and the second cooling channel. The connector 40 is connected between the first cold plate 10 and the second cold plate 20, so that the relative positions of the first cold plate 10 and the second cold plate 20 can be fixed. The connection between the connector 40 and the first cold plate 10 and the second cold plate 20 can form a sealing structure, thereby making the structure of the cold plate assembly more stable.

[0032] (8) The regional temperature of the battery cell module can be obtained. Afterwards, the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly can be controlled based on the regional temperature of the battery cell module and the preset temperature conditions. In this way, by controlling the liquid flow of the first cold plate and / or the liquid flow of the second cold plate, the temperature of different regions of the battery cell module can be adjusted more accurately, improving the problem of uneven temperature distribution of the battery cell module, so that the battery can operate at a suitable temperature, thereby improving the charging and discharging efficiency of the battery.

[0033] (9) By setting a first preset temperature threshold, a second preset temperature threshold and a preset temperature difference threshold, when the temperature of any one of the multiple areas is too high, too low or the regional temperature difference is too large, the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly can be used to adjust the regional temperature of the battery module, so that the battery module can operate within a suitable operating temperature range, thereby slowing down the aging of the battery and extending the battery life.

[0034] (10) When the temperature of the central area is greater than or equal to the first preset temperature threshold, that is, the temperature of the central area is too high, by increasing the liquid flow rate of the first cold plate, the temperature of the central area can be quickly reduced, thereby improving the charging and discharging efficiency of the battery module. When the temperature of the central area is less than or equal to the second preset temperature threshold, that is, the temperature of the central area is too low, by increasing the liquid flow rate of the first cold plate, the temperature of the central area can be quickly increased, ensuring that the battery module can provide sufficient power output at an appropriate temperature, thereby meeting the operating requirements of the equipment. In this way, the heat exchange capacity of the central area can be enhanced and the temperature of the central area can be quickly adjusted. When the temperature of the peripheral area is greater than or equal to the first preset temperature threshold, that is, the temperature of the peripheral area is too high, by increasing the liquid flow rate of the second cold plate, the temperature of the peripheral area can be quickly reduced, thereby improving the charging and discharging efficiency of the battery module. When the temperature of the peripheral area is less than or equal to the second preset temperature threshold, that is, the temperature of the peripheral area is too low, by increasing the liquid flow rate of the second cold plate, the temperature of the peripheral area can be quickly increased, ensuring that the battery module can provide sufficient power output at an appropriate temperature, thereby meeting the operating requirements of the equipment. In this way, the heat exchange capacity of the edge area can be enhanced and the temperature of the peripheral area can be quickly adjusted. By increasing the liquid flow of the first cold plate and / or the liquid flow of the second cold plate according to the temperature change trend, the temperature fluctuation of each area of ​​the battery cell module can be reduced, thereby making the temperature distribution of the battery cell module more uniform, thereby extending the life of the battery cell module.

[0035] It should be noted that the technical effects brought about by any implementation method in the second to eighth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0036] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0038] Figure 1 is a schematic structural diagram of a cold plate assembly according to an exemplary embodiment;

[0039] Figure 2 is a schematic structural diagram of another cold plate assembly according to an exemplary embodiment;

[0040] Figure 3 is a schematic structural diagram of another cold plate assembly according to an exemplary embodiment;

[0041] Figure 4 is a schematic structural diagram of another cold plate assembly according to an exemplary embodiment;

[0042] Figure 5 is a flow chart illustrating a flow control method according to an exemplary embodiment;

[0043] Figure 6 is a structural schematic diagram of a flow control device according to an exemplary embodiment;

[0044] Figure 7 It is a structural schematic diagram of another flow control device according to an exemplary embodiment.

[0045] Reference numerals:

[0046] 10. First cold plate; 101. First cooling channel; 102. First inlet; 103. First outlet; 104. First channel portion; 105. Third channel portion; 20. Second cold plate; 201. Second cooling channel; 202. Second inlet; 203. Second outlet; 204. Second channel portion; 205. Fourth channel portion; 30. Sealing thermal adhesive; 40. Connector. DETAILED DESCRIPTION

[0047] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0048] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0049] like Figure 1 As shown, the present application provides a cold plate assembly, which includes: a first cold plate 10 and a second cold plate 20 .

[0050] in, Figure 1 (a) in FIG. 1 represents the first cold plate 10, Figure 1 (b) in FIG. 1 represents the second cold plate 20 .

[0051] In the embodiment of the present application, a first cold plate 10 is formed with a first cooling channel 101, and the first cooling channel 101 has a first inlet 102 and a first outlet 103 at both ends. A second cold plate 20 is stacked on one side of the first cold plate 10 and formed with a second cooling channel 201. The second cooling channel 201 has a second inlet 202 and a second outlet 203 at both ends. The first cooling channel 101 includes a first channel portion 104, and the second cooling channel 201 includes a second channel portion 204. The orthographic projection of the second channel portion 204 on the first cold plate 10 is located on the periphery of the first channel portion 104 and is arranged around the first channel portion 104.

[0052] It should be noted that if Figure 2 As shown, traditional cold plate assemblies usually adopt a single-layer flow channel design. The flow channel design is fixed and cannot be dynamically adjusted in real time according to the temperature changes inside the battery. This may cause the battery cell modules in some areas to be too high, the battery cell modules in some areas to be too low, or the temperature difference between different areas of the battery cell modules to be large, which in turn leads to the risk of over-limit use of the battery, and thus requires power limiting control of the battery, affecting the battery's discharge performance and fast charging time. There are also restrictions on the location of the liquid inlet and outlet. When the liquid needs to cool the target area of ​​the battery cell module, it needs to pass through the battery cell modules in other areas first. In this process, the temperature of the liquid will be affected by heat transfer, resulting in the cooling effect being weakened when the liquid adjusts the temperature of the battery cell module in the target area.

[0053] In this way, by setting the first cold plate 10 and the second cold plate 20, and setting the first inlet 102 and the first outlet 103 at both ends of the first cooling channel 101, and setting the second inlet 202 and the second outlet 203 at both ends of the second cooling channel 201, when the liquid needs to cool the target area of ​​the battery cell module, by controlling the flow rate of the first cold plate 10 or the second cold plate 20, the liquid can flow directly into the target area, so that the liquid can be dynamically controlled to cool the battery cell modules in different areas, thereby improving the cooling effect of the liquid and more accurately controlling the temperature of the battery cell module.

[0054] It is understandable that the present application can independently control the flow of the first cold plate 10 and the second cold plate 20 by providing a first inlet 102 and a first outlet 103 at both ends of the first cooling channel 101, and providing a second inlet 202 and a second outlet 203 at both ends of the second cooling channel 201. In this way, by equipping the first cold plate 10 and the second cold plate 20 with independent inlets and outlets, respectively, the flow distribution of each cold plate can be independently controlled. Furthermore, the flow of the first cold plate 10 and the second cold plate 20 can be flexibly adjusted according to the actual temperature requirements of the battery cell module, thereby more accurately controlling the temperature of the battery cell module.

[0055] In some embodiments, the first cold plate includes a first vapor chamber and a first flow plate, and the second cold plate includes a second vapor chamber and a second flow plate. The first vapor chamber is stacked on one side of the first flow plate, which has a first cooling channel formed therein. The second vapor chamber is stacked on one side of the second flow plate, which has a second cooling channel formed therein.

[0056] In some embodiments, as Figure 3 As shown, the first cooling channel 101 further includes a third channel portion 105. The third channel portion 105 is located outside the first channel portion 104 and is disposed around the first channel portion 104. The second cooling channel 201 further includes a fourth channel portion 205. The second channel portion 204 is located outside the fourth channel portion 205 and is disposed around the fourth channel portion 205.

[0057] It should be noted that according to heat conduction theory, heat diffuses from high-temperature areas to low-temperature areas. Therefore, if the temperature of one area of ​​the battery module is too high, the temperature of other areas will also rise accordingly. Thus, by providing the third flow channel portion 105 around the first flow channel portion 104 and the second flow channel portion 204 around the fourth flow channel portion 205, the temperature around the target area can be adjusted, thereby more accurately controlling the temperature of the battery module.

[0058] It is understood that the third flow channel portion 105 is located outside the first flow channel portion 104, assisting the second region in controlling the peripheral temperature of the first flow channel portion 104, thereby preventing heat from accumulating in the edge region. The second flow channel portion 204 is located outside the fourth flow channel portion 205, assisting the first flow channel portion 104 in controlling the temperature of the first flow channel portion 104, thereby preventing heat from accumulating in the first flow channel portion 104. This fully utilizes the space of the cold plate assembly and enhances the cooling capacity of the cold plate assembly.

[0059] In some embodiments, as Figure 3 As shown, a first protrusion is provided on the side of the first cold plate 10 facing the second cold plate 20, and a first cooling channel 101 is recessed into the first protrusion from the side of the first cold plate 10 facing away from the second cold plate 20. A second protrusion is provided on the side of the second cold plate 20 facing the first cold plate 10, and a second cooling channel 201 is recessed into the second protrusion from the side of the second cold plate 20 facing away from the first cold plate 10.

[0060] It should be noted that the protruding structure can increase the tortuous path of the flow channel, prolong the contact time between the liquid and the cold plate assembly, and increase the heat exchange surface area per unit volume, thereby improving the heat exchange capacity of the first cold plate 10 and the second cold plate 20.

[0061] It is understandable that a first protruding structure is provided on the side of the first cold plate 10 facing the second cold plate 20, and the first cooling channel 101 is recessed from the surface of the first cold plate 10 away from the second cold plate 20 into the first protruding structure, which can improve the heat exchange efficiency of the first cooling channel 101, so that the first cold plate 10 can transfer heat faster. A second protruding structure is provided on the side of the second cold plate 20 facing the first cold plate 10, and the second cooling channel 201 is recessed from the surface of the second cold plate 20 away from the first cold plate 10 into the second protruding structure, which can improve the heat exchange efficiency of the second cooling channel 201, so that the second cold plate 20 can transfer heat faster. Furthermore, the contact area between the cold plate assembly and the battery cell module can be increased, so that the cold plate assembly can control the temperature of the battery cell module more quickly.

[0062] In some embodiments, as Figure 3 As shown, along the first direction, the depth of the first flow channel portion 104 is greater than the depth of the third flow channel portion 105. The first direction is parallel to the stacking direction of the first cold plate 10 and the second cold plate 20.

[0063] Exemplarily, the first flow channel portion 104 includes multiple flow channel regions, including: a first flow channel region and a second flow channel region, wherein the depth of the first flow channel region along the first direction is greater than the depth of the second flow channel region along the first direction. The third flow channel portion 105 includes a third flow channel region and a fourth flow channel region, wherein the depth of the third flow channel region along the first direction is greater than the depth of the fourth flow channel region along the first direction.

[0064] In this way, the first flow channel portion 104 and the third flow channel portion 105 can be gradually transitioned.

[0065] It should be noted that, along the first direction, the depth of the first flow channel portion 104 is greater than the depth of the third flow channel portion 105. This can increase the flow rate flowing into the first flow channel portion 104, thereby enhancing the heat exchange capability of the first flow channel portion 104. At the same time, the flow rate flowing into the third flow channel portion 105 can be reduced, thereby weakening the heat exchange capability of the third flow channel portion 105.

[0066] It can be understood that along the first direction, the depth of the first flow channel portion 104 is greater than the depth of the third flow channel portion 105, which can allow more liquid flow through areas with higher temperatures and less liquid flow through areas with lower temperatures, thereby making the temperature distribution of various areas of the battery cell module more uniform.

[0067] In some embodiments, as Figure 3As shown, along the stacking direction of the first cold plate 10 and the second cold plate 20, the depth of the portion of the second protrusion structure forming the second flow channel portion 204 along the third direction is greater than the depth of the portion of the first protrusion structure forming the fourth flow channel portion 205 along the third direction. The third direction is opposite to the first direction.

[0068] Exemplarily, the first flow channel portion 104 includes a fifth flow channel region and a sixth flow channel region, wherein the depth of the fifth flow channel region along the third direction is greater than the depth of the sixth flow channel region along the third direction. The third flow channel portion 105 includes a seventh flow channel region and an eighth flow channel region, wherein the depth of the seventh flow channel region along the third direction is greater than the depth of the eighth flow channel region along the third direction.

[0069] It can be understood that the depth of the portion of the second protrusion forming the second flow channel 204 along the third direction is greater than the depth of the portion of the first protrusion forming the fourth flow channel 205 along the third direction. This can increase the flow rate into the second flow channel 204, resulting in a stronger heat exchange capability for the second flow channel 204. At the same time, it can reduce the flow rate into the fourth flow channel 205, resulting in a weaker heat exchange capability for the fourth flow channel 205. This allows for dynamic adjustment of various regions of the battery cell module.

[0070] In some embodiments, as Figure 3 As shown, the first cooling channel 101 includes multiple first channel segments arranged along a second direction, and the second cooling channel 201 includes multiple second channel segments arranged along the second direction. The second direction is perpendicular to the first direction and parallel to the first cold plate 10. The first direction is parallel to the stacking direction of the first cold plate 10 and the second cold plate 20. One first channel segment corresponds to one second channel segment, and the spacing between one first channel segment and one second channel segment is a first spacing, and any two first spacings are equal.

[0071] That is, along the first direction, the sum of the depths of the plurality of first flow channel segments is equal to the sum of the depths of the plurality of second flow channel segments.

[0072] It should be noted that the present application does not limit the structure of the first cooling channel. Figure 3 , multiple first flow channel sections are connected end to end in sequence to form a serpentine coil structure, and the extension direction of the first flow channel section is perpendicular to the first direction and perpendicular to the second direction.

[0073] It should be noted that a first flow channel section corresponds to a second flow channel section, and the spacing between a first flow channel section and a second flow channel section is a first spacing. Any two first spacings are equal, so that a uniform gap can be formed between the first protrusion structure and the second protrusion structure, so that the cold plate assembly can transfer heat evenly and reduce local temperature differences.

[0074] It is understood that one first flow channel segment corresponds to one second flow channel segment, and the spacing between one first flow channel segment and one second flow channel segment is the first spacing. Any two first spacings are equal, which can make the surface temperature distribution of the cooling assembly consistent, thereby extending the life of the battery cell module. Furthermore, the overall cooling rate of the cooling assembly can be accelerated.

[0075] In some embodiments, as Figure 4 As shown, the cold plate assembly further includes: a sealing thermal conductive adhesive 30 , which is filled between the first cold plate 10 and the second cold plate 20 and is used to transfer temperature between the first cold plate 10 and the second cold plate 20 .

[0076] It should be noted that there is a gap between the first cold plate 10 and the second cold plate 20. The sealing thermal conductive adhesive 30 is filled between the first cold plate 10 and the second cold plate 20, which can quickly transfer temperature between the first cold plate 10 and the second cold plate 20, thereby enabling the cold plate assembly to better dissipate heat from the battery cell module.

[0077] It is understandable that the sealing thermal conductive adhesive 30 is filled between the first cold plate 10 and the second cold plate 20 to seal the first cold plate 10 and the second cold plate 20 and improve the heat conduction efficiency between the first cold plate 10 and the second cold plate 20 .

[0078] In some embodiments, as Figure 4 As shown, the cold plate assembly further includes: a connector 40 , which is provided around the first cooling channel 101 and the second cooling channel, and is connected between the first cold plate 10 and the second cold plate 20 .

[0079] It should be noted that this application does not limit the specific arrangement of the connector 40 around the first cooling channel 101 and the second cooling channel. For example, the connector 40 can be arranged around the outer periphery of the cooling channel. For another example, the connector 40 can be located at a portion of the outer periphery of the cooling channel.

[0080] Optionally, the connecting member 40 includes: a support plate.

[0081] Exemplarily, the support plate is welded to the peripheral areas of the heat sink and the flow channel plate.

[0082] It is understandable that the connector 40 is connected to the vapor chamber and the flow channel plate by welding, thereby achieving a stable support and sealing function for the upper and lower cold plates.

[0083] It should be noted that the connector 40 is connected to the first cold plate 10 and the second cold plate 20. The first cold plate 10 and the second cold plate 20 are connected to each other through the connector 40, which can fix the first cold plate 10 and the second cold plate 20. In addition, the positions of the first cold plate 10 and the second cold plate 20 can be made more precise.

[0084] It can be understood that the connecting member 40 is arranged on the peripheral side of the first cooling channel 101 and the second cooling channel, and the connecting member 40 is connected between the first cold plate 10 and the second cold plate 20, so that the relative positions of the first cold plate 10 and the second cold plate 20 can be fixed. The connection between the connecting member 40 and the first cold plate 10 and the second cold plate 20 can form a sealing structure, thereby making the structure of the cold plate assembly more stable.

[0085] It should be noted that the battery will generate a lot of heat during operation, which needs to be effectively managed through the battery's flow control device.

[0086] In some embodiments, the present application further provides a battery pack comprising a cold plate assembly, a cell module, and a flow control device according to any of the above embodiments. The cell modules are stacked on one side of the cold plate assembly. The flow control device is configured to execute the flow control method described in any of the above embodiments.

[0087] It should be noted that, since the battery pack in the embodiment of the present application includes a cold plate assembly, the technical effects that can be obtained can also refer to the above embodiment, and the embodiment of the present application will not be repeated here.

[0088] It should be noted that after assembling the upper cold plate, support plate, heat spreader, flow channel plate, and lower cold plate to obtain the cold plate assembly, in order to ensure the connection accuracy and sealing performance between the various components, it is necessary to verify the overall sealing performance of the cold plate assembly through a sealing test to prevent liquid leakage. Afterwards, a liquid circulation test can be performed to adjust the liquid flow to verify whether the cooling performance of the first cold plate 10 and the second cold plate 20 meets the design requirements. Afterwards, the temperature control strategy can be optimized based on the test data, thereby achieving the efficiency and reliability of cooling the battery cell module through the cold plate assembly.

[0089] For ease of understanding, the flow control method provided in this application is described in detail below with reference to the accompanying drawings.

[0090] like Figure 5 As shown, applied to the above-mentioned cold plate assembly, the flow control method includes:

[0091] S501: Obtain the regional temperature of the battery cell module.

[0092] The battery cell modules are stacked on one side of the cold plate assembly.

[0093] Optionally, the regional temperature of the battery cell module includes temperatures of multiple regions of the battery cell module, and the preset temperature condition includes at least one of the following:

[0094] In the embodiment of the present application, the multiple regions include: a peripheral region of the cell module, a central region of the cell module, and a transition region, wherein the transition region is the region between the peripheral region and the central region. The peripheral region corresponds to the region of the first flow channel portion near the peripheral portion, the central region corresponds to the region of the second flow channel portion near the central portion, and the transition region corresponds to the region of the first flow channel portion near the central portion and the region of the second flow channel portion near the peripheral portion.

[0095] Optionally, multiple temperature sensors are provided in multiple areas of the battery cell module.

[0096] In a possible implementation, the temperatures of multiple regions of the battery cell module may be obtained based on the temperatures of multiple temperature sensors.

[0097] It should be noted that the temperature of the battery cell module can be monitored in real time through multiple temperature sensors. By obtaining temperature data of multiple areas, the temperature distribution of each area of ​​the battery cell module can be obtained, thereby analyzing the uniformity and change trend of the temperature distribution of each area of ​​the battery cell module.

[0098] S502: Control the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly based on the regional temperature of the battery cell module and a preset temperature condition.

[0099] Optionally, the preset temperature condition includes at least one of the following: a temperature of any one of the plurality of zones is greater than a first preset temperature threshold; a temperature of any one of the plurality of zones is less than a second preset temperature threshold; a zone temperature difference is greater than a preset temperature difference threshold, where the zone temperature difference is the difference between the temperatures of any two zones in the plurality of zones.

[0100] It should be noted that this application does not limit the first preset temperature threshold, the second preset temperature threshold and the preset temperature difference threshold. For example, the first preset temperature threshold may be the highest temperature among the temperatures of multiple areas, the second preset temperature threshold may be the lowest temperature among the temperatures of multiple areas, and the preset temperature difference threshold may be the regional temperature difference with the largest difference among the temperature differences of multiple areas. For another example, the first preset temperature threshold may be 40 degrees Celsius, 45 degrees Celsius, 50 degrees Celsius, 55 degrees Celsius or 60 degrees Celsius, the second preset temperature threshold may be 0 degrees Celsius, -5 degrees Celsius, -10 degrees Celsius, -15 degrees Celsius or -20 degrees Celsius, and the preset temperature difference threshold may be 1 degree Celsius, 2 degrees Celsius, 3 degrees Celsius, 4 degrees Celsius or 5 degrees Celsius.

[0101] It should be understood that if the temperature of the battery cell module is too low, the battery's chemical activity will decrease, the internal resistance will increase, and the battery's charge and discharge efficiency will decrease, capacity decay will occur, and this may cause battery damage. If the temperature of the battery cell module is too high, the battery capacity decay will be accelerated, thereby affecting and limiting the battery pack's overall capacity, power, fast charge time, and discharge power. If the temperature difference between different areas of the battery cell module is too large, it will affect the battery pack's capacity, power, and lifespan.

[0102] In this way, by setting the first preset temperature threshold, the second preset temperature threshold and the preset temperature difference threshold, if the temperature of any one of the multiple areas is too high, too low or the regional temperature difference is too large, the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly can be used to adjust the regional temperature of the battery module, so that the battery module can operate within a suitable operating temperature range, thereby slowing down the aging of the battery and extending the battery life.

[0103] It should be noted that the center of the cell module is farther from the cell module surface, and heat dissipation is slower, so the temperature in the center of the cell module rises faster. The edge of the cell module is closer to the cell module surface, and heat dissipation is faster, so the temperature in the center of the cell module rises slower.

[0104] In a possible implementation, when the temperature of the central area is greater than or equal to a first preset temperature threshold, or the temperature of the central area is less than or equal to a second preset temperature threshold, the liquid flow of the first cold plate may be increased.

[0105] Optionally, when the temperature of the central area is greater than or equal to a first preset temperature threshold, or the temperature of the central area is less than or equal to a second preset temperature threshold, the liquid flow of the first cold plate may be increased, and the liquid flow of the second cold plate may be decreased.

[0106] It can be understood that when the temperature of the central area is greater than or equal to the first preset temperature threshold, that is, the temperature of the central area is too high, by increasing the liquid flow rate of the first cold plate, the temperature of the central area can be quickly reduced, thereby improving the charging and discharging efficiency of the battery module. When the temperature of the central area is less than or equal to the second preset temperature threshold, that is, the temperature of the central area is too low, by increasing the liquid flow rate of the first cold plate, the temperature of the central area can be quickly increased, ensuring that the battery module can provide sufficient power output at an appropriate temperature, thereby meeting the operating requirements of the equipment. In this way, the heat exchange capacity of the central area can be enhanced and the temperature of the central area can be quickly adjusted.

[0107] In another possible implementation, when the temperature of the peripheral area is greater than or equal to a first preset temperature threshold, or when the temperature of the peripheral area is less than or equal to a second preset temperature threshold, the liquid flow rate of the second cold plate may be increased.

[0108] Optionally, when the temperature of the peripheral area is greater than or equal to a first preset temperature threshold, or the temperature of the peripheral area is less than or equal to a second preset temperature threshold, the liquid flow of the second cold plate may be increased, and the liquid flow of the first cold plate may be decreased.

[0109] It can be understood that when the temperature of the peripheral area is greater than or equal to the first preset temperature threshold, that is, the temperature of the peripheral area is too high, by increasing the liquid flow rate of the second cold plate, the temperature of the peripheral area can be quickly reduced, thereby improving the charging and discharging efficiency of the battery module. When the temperature of the peripheral area is less than or equal to the second preset temperature threshold, that is, the temperature of the peripheral area is too low, by increasing the liquid flow rate of the second cold plate, the temperature of the peripheral area can be quickly increased, ensuring that the battery module can provide sufficient power output at an appropriate temperature, thereby meeting the operating requirements of the equipment. In this way, the heat exchange capacity of the edge area can be enhanced and the temperature of the peripheral area can be quickly adjusted.

[0110] In another possible implementation, when the temperature of the transition zone is greater than or equal to a first preset temperature threshold, or the temperature of the transition zone is less than or equal to a second preset temperature threshold, the temperature change trend of the transition zone can be obtained, and the liquid flow of the first cold plate and / or the liquid flow of the second cold plate can be increased based on the temperature change trend of the transition zone.

[0111] Optionally, the transition region includes multiple transition sub-regions, and the temperature change trend includes: a first change trend, a second change trend, and a third change trend. The first change trend is used to indicate that the target distance is positively correlated with time, the target distance is the distance between the target sub-region and the central region, and the target sub-region is the transition sub-region with the highest temperature among the multiple transition sub-regions. The second change trend is used to indicate that the target distance is negatively correlated with time, and the third change trend is used to indicate that the target distance is uncorrelated with time.

[0112] It should be understood that the target distance being independent of time means that the target distance remains unchanged as time changes.

[0113] In one possible design, if the temperature change trend in the transition region is a first trend, the liquid flow rate of the first cold plate can be increased. If the temperature change trend in the transition region is a second trend, the liquid flow rate of the second cold plate can be increased. If the temperature change trend in the transition region is a third trend, cold plate control information at a target time can be obtained, where the target time is the moment before the current time. Based on the cold plate control information at the target time, the first cold plate and / or the second cold plate can then be increased.

[0114] Exemplarily, when the cold plate control information at the target time is used to instruct to increase the size of the first cold plate, the first cold plate may be increased.

[0115] In this way, the ratio of the liquid flow rates of the first cold plate and the second cold plate can be dynamically adjusted.

[0116] It can be understood that by increasing the liquid flow of the first cold plate and / or the liquid flow of the second cold plate according to the temperature change trend, the temperature fluctuation of each area of ​​the battery cell module can be reduced, thereby making the temperature distribution of the battery cell module more uniform, thereby extending the life of the battery cell module.

[0117] Based on the above technical solution, the regional temperature of the battery cell module can be obtained. Afterwards, the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly can be controlled based on the regional temperature of the battery cell module and the preset temperature conditions. In this way, by controlling the liquid flow of the first cold plate and / or the liquid flow of the second cold plate, the temperature of different areas of the battery cell module can be adjusted more accurately, improving the problem of uneven temperature distribution of the battery cell module, so that the battery can operate at a suitable temperature, thereby improving the battery's charge and discharge efficiency.

[0118] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of method. In order to realize the above functions, the flow control device includes a hardware structure and / or software module corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0119] In the embodiment of the present application, the flow control device can be divided into functional modules according to the above method. For example, the flow control device can include functional modules corresponding to the functional divisions, or two or more functions can be integrated into one control module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0120] Reference Figure 6 The flow control device includes an acquisition module 601 and a control module 602.

[0121] The acquisition module 601 is used to acquire the regional temperature of the battery cell modules, where the battery cell modules are stacked on one side of the cold plate assembly.

[0122] The control module 602 is configured to control the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly based on the regional temperature of the battery cell module and a preset temperature condition.

[0123] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0124] like Figure 7 As shown, the flow control device includes but is not limited to: a processor 701 and a memory 702 .

[0125] The memory 702 is configured to store executable instructions of the processor 701. It is understood that the processor 701 is configured to execute instructions to implement the flow control method in the above embodiment.

[0126] It should be noted that those skilled in the art can understand that Figure 7 The flow control device structure shown in the figure does not constitute a limitation on the flow control device, and the flow control device may include Figure 7 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0127] The processor 701 is the control center of the flow control device. It uses various interfaces and lines to connect the various parts of the entire flow control device. By running or executing software programs and / or modules stored in the memory 702 and calling data stored in the memory 702, it performs various functions of the flow control device and processes data, thereby monitoring the flow control device as a whole. The processor 701 may include one or more processing units. Optionally, the processor 701 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 701.

[0128] The memory 702 can be used to store software programs and various data. The memory 702 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). Furthermore, the memory 702 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0129] In an exemplary embodiment, the present application also provides a vehicle, which includes the above-mentioned battery pack, and the vehicle can execute the above-mentioned battery pack to complete the method in the above-mentioned embodiment.

[0130] It should be noted that the vehicle may be, but is not limited to, a pure electric vehicle (Pure Electric Vehicle / Battery Electric Vehicle, PEV / BEV), a hybrid electric vehicle (Hybrid Electric Vehicle, HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle (New Energy Vehicle), a fuel vehicle, etc.

[0131] In an exemplary embodiment, a computer-readable storage medium including instructions is further provided, such as a memory 702 including instructions. The instructions can be executed by the processor 701 of the flow control device to implement the method in the above embodiment.

[0132] In actual implementation, Figure 6 The functions of the acquisition module 601 and the control module 602 can be obtained by Figure 7The processor 701 in the embodiment calls the computer program stored in the memory 702. The specific execution process can be referred to the description of the method part in the above embodiment, which will not be repeated here.

[0133] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0134] In an exemplary embodiment, the present application further provides a computer program product comprising one or more instructions, which can be executed by the processor 701 of the flow control device to implement the method in the above embodiment.

[0135] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the flow control device, the various processes of the above-mentioned method embodiment are implemented, and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0136] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0137] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0138] Units described as separate components may or may not be physically separate, and components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0139] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0140] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0141] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A cold plate assembly, characterized in that: The cold plate assembly comprises: A first cold plate (10) is formed with a first cooling channel (101), wherein both ends of the first cooling channel (101) respectively have a first inlet (102) and a first outlet (103); and A second cold plate (20) is stacked on one side of the first cold plate (10) and forms a second cooling channel (201); both ends of the second cooling channel (201) respectively have a second inlet (202) and a second outlet (203); The first cooling channel (101) includes a first channel portion (104), and the second cooling channel (201) includes a second channel portion (204); an orthographic projection of the second channel portion (204) on the first cold plate (10) is located outside the first channel portion (104) and is arranged around the first channel portion (104); The first cooling channel (101) further includes a third channel portion (105); the third channel portion (105) is located at the periphery of the first channel portion (104) and is arranged around the first channel portion (104); The second cooling channel (201) further includes a fourth channel portion (205), and the second channel portion (204) is located at the periphery of the fourth channel portion (205) and is arranged around the fourth channel portion (205).

2. The cold plate assembly according to claim 1, wherein: A first protruding structure is provided on a side of the first cold plate (10) facing the second cold plate (20), and the first cooling channel (101) is recessed from a surface of the first cold plate (10) away from the second cold plate (20) into the first protruding structure; A second protruding structure is provided on a side of the second cold plate (20) facing the first cold plate (10), and the second cooling channel (201) is recessed from a surface of the second cold plate (20) away from the first cold plate (10) into the second protruding structure.

3. The cold plate assembly according to claim 2, wherein: Along a first direction, the depth of the first flow channel portion (104) is greater than the depth of the third flow channel portion (105); the first direction is parallel to the stacking direction of the first cold plate (10) and the second cold plate (20).

4. The cold plate assembly according to claim 2, wherein: The first cooling channel (101) includes a plurality of first channel segments arranged along a second direction, and the second cooling channel (201) includes a plurality of second channel segments arranged along the second direction, the second direction being perpendicular to the first direction and parallel to the first cold plate (10), and the first direction being parallel to the stacking direction of the first cold plate (10) and the second cold plate (20); One first flow channel segment corresponds to one second flow channel segment, and the distance between one first flow channel segment and one second flow channel segment is a first distance, and any two first distances are equal.

5. The cold plate assembly according to claim 1, wherein: The cold plate assembly further comprises: Sealing thermal conductive adhesive (30), the sealing thermal conductive adhesive (30) is filled between the first cold plate (10) and the second cold plate (20).

6. The cold plate assembly according to claim 1, wherein: The cold plate assembly further comprises: A connecting member (40) is provided on the peripheral sides of the first cooling channel (101) and the second cooling channel, and the connecting member (40) is connected between the first cold plate (10) and the second cold plate (20).

7. A flow control method, characterized in that: Applied to the cold plate assembly according to any one of claims 1 to 6, the flow control method comprises: Obtaining a regional temperature of a battery cell module, wherein the battery cell module is stacked on one side of the cold plate assembly; Based on the regional temperature of the battery cell module and a preset temperature condition, the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly are controlled.

8. The flow control method according to claim 7, characterized in that: The regional temperature of the battery cell module includes: the temperatures of multiple regions of the battery cell module, and the preset temperature condition includes at least one of the following: The temperature of any one of the multiple areas is greater than or equal to a first preset temperature threshold; The temperature of any one of the multiple areas is less than or equal to a second preset temperature threshold; The regional temperature difference is greater than or equal to a preset temperature difference threshold, and the regional temperature difference is the difference between the temperatures of any two regions among the multiple regions.

9. The flow control method according to claim 8, characterized in that: The multiple regions include: a peripheral region of the battery cell module, a central region of the battery cell module, and a transition region, wherein the transition region is a region between the peripheral region and the central region; the peripheral region corresponds to a region close to the peripheral portion of the first flow channel portion, the central region corresponds to a region close to the central portion of the second flow channel portion, and the transition region corresponds to a region close to the central portion of the first flow channel portion and a region close to the peripheral portion of the second flow channel portion; The controlling of the liquid flow of the first cold plate in the cold plate assembly and / or the liquid flow of the second cold plate in the cold plate assembly based on the regional temperature of the battery cell module and the preset temperature condition includes: When the temperature of the central area is greater than or equal to the first preset temperature threshold, or when the temperature of the central area is less than or equal to the second preset temperature threshold, increasing the liquid flow of the first cold plate; When the temperature of the peripheral area is greater than or equal to the first preset temperature threshold, or when the temperature of the peripheral area is less than or equal to the second preset temperature threshold, increasing the liquid flow of the second cold plate; When the temperature of the transition area is greater than or equal to the first preset temperature threshold, or when the temperature of the transition area is less than or equal to the second preset temperature threshold, a temperature change trend of the transition area is obtained, and the liquid flow rate of the first cold plate and / or the liquid flow rate of the second cold plate is increased based on the temperature change trend of the transition area.

10. A battery pack, characterized in that: The battery pack comprises: a cold plate assembly according to any one of claims 1 to 6; The battery cell module is stacked with the cold plate assembly.

11. A vehicle, characterized in that: The vehicle includes the battery pack according to claim 10 .

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