Cooling plate and battery pack

Abstract

The application provides a cooling plate and a battery pack, and relates to the technical field of cooling. The cooling plate is arranged on one side of a battery module and is used for cooling the battery module. The cooling plate comprises a first cooling part and a second cooling part. The first cooling part is arranged at the middle part of the battery module in a first direction, and is used for cooling the middle part of the battery module. The second cooling part is arranged at both ends of the first cooling part in the first direction, and is used for cooling the end part of the battery module. The first direction is the length direction or the width direction of the battery module, and the flow channel arrangement density of the first cooling part is greater than that of the second cooling part. The first cooling part with high cooling effect is used for cooling the middle part area of the battery module with high temperature, and the second cooling part with low cooling effect is used for cooling the end part area of the battery module with low temperature. The cooling efficiency of the cooling plate and the temperature of the battery module are matched, and the available capacity and the cycle life of the battery pack are improved.

Description

Technical Field

[0001] This application relates to the field of cooling technology, specifically to a cooling plate and a battery pack. Background Technology

[0002] With the rapid development of new energy technologies in my country, heat dissipation in battery packs has received increasing attention. Because cells located in the central region of the battery pack are partially surrounded by cells at the ends, their heat dissipation conditions are the worst, making them "hot spots" in the entire system; while cells at the edges have better heat dissipation conditions and lower temperatures. Existing cooling plates have uniformly arranged flow channels, which results in either insufficient cooling energy for the battery modules (the center remains overheated) or excessive cooling energy (the edges are undercooled), ultimately creating a significant temperature gradient within the battery pack. This non-uniformity accelerates inconsistent degradation of the battery modules, affecting overall usable capacity and cycle life, and in extreme cases, may even lead to safety hazards. Summary of the Invention

[0003] In view of this, this application provides a cooling plate that at least solves the problem that the cooling plate causes a temperature gradient in the battery pack when cooling the battery pack, affecting the battery pack capacity and service life, and even posing safety hazards. This application also provides a battery pack including the above-mentioned cooling plate.

[0004] To achieve the above objectives, this application provides the following technical solution: A cooling plate, disposed on one side of a battery module and used to cool the battery module, includes: A first cooling section is disposed in the middle of the battery module in a first direction, and the first cooling section is used to cool the middle of the battery module; A second cooling section is disposed at both ends of the first cooling section in the first direction, and the second cooling section is used to cool the ends of the battery module. Wherein, the first direction is the length direction or width direction of the battery module, and the flow channel arrangement density of the first cooling part is greater than the flow channel arrangement density of the second cooling part; the first cooling part includes a first flow channel, the second cooling part includes a second flow channel, the first flow channel is a bent flow channel, and the second flow channel is a linear flow channel.

[0005] Optionally, in the first direction, multiple first flow channels are arranged sequentially, and the two ends of adjacent first flow channels are connected.

[0006] Optionally, the diameter of the first flow channel is smaller than the diameter of the second flow channel.

[0007] Optionally, each of the first flow channels includes a protrusion and a recess, with the protrusion of one of the adjacent first flow channels extending into the recess of the other.

[0008] Optionally, a turbulence column is provided in the bend area of ​​the first flow channel, and the cross-sectional shape of the turbulence column is elliptical.

[0009] Optionally, the first cooling section is provided with a first temperature sensor, and / or the second cooling section is provided with a second temperature sensor.

[0010] Optional, including: The inlet valve includes a first inlet end, a first outlet end and a second outlet end that are both connected to the first inlet end, the first outlet end being connected to the inlet of the first flow channel, and the second outlet end being connected to the inlet of the second flow channel. The liquid outlet valve includes a third liquid outlet end and a second liquid inlet end and a third liquid inlet end, both of which are connected to the third liquid outlet end. The second liquid inlet end is connected to the outlet of the first flow channel, and the third liquid inlet end is connected to the outlet of the second flow channel.

[0011] Optionally, the ends of the first and second flow channels near the set point are connected.

[0012] Optionally, the first inlet end is provided with a proportional valve, which controls the inlet flow rate of the inlet valve.

[0013] Optionally, the inlet valve is a three-way proportional valve.

[0014] A battery pack includes a cooling plate as described in any of the preceding claims, the battery pack including a battery module, the battery module including a cell group arranged along a first direction, the cell group including a plurality of cells stacked along a direction perpendicular to the first direction.

[0015] The cooling plate provided in this application includes a first cooling section and a second cooling section. The first cooling section is disposed in the middle of the battery module to cool the middle part of the battery module. The second cooling section is disposed at both ends of the first cooling section in a first direction to cool the ends of the battery module. The first direction is either the length or width direction of the battery module, and the flow channel density of the first cooling section is greater than that of the second cooling section. That is, the flow channels in the first cooling section of the cooling plate are arranged more densely, while the flow channels in the second cooling section are arranged more sparsely. With this arrangement, the cooling effect of the first cooling section on the middle region of the battery module is greater than the cooling effect of the second cooling section on the ends of the battery module. Since the temperature is higher in the middle of the battery module and lower at both ends, when the aforementioned cooling plate is used to cool the battery module, the first cooling section, which has a higher cooling effect, cools the higher-temperature middle area of ​​the battery module, while the second cooling section, which has a lower cooling effect, cools the lower-temperature end area of ​​the battery module. This ensures that the cooling efficiency of the cooling plate matches the temperature of the battery module, thereby avoiding significant temperature gradients in the battery module, improving the consistency of cell degradation in the battery module, increasing the usable capacity and cycle life of the battery pack, and ultimately improving the safety of the battery pack during use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the cooling plate provided in this embodiment.

[0018] Figure 2 This is a schematic diagram of the structure for the flow of cooling medium within the cooling plate.

[0019] Figure 3 A schematic diagram of the structure for the cooling section of the cooling plate.

[0020] Figure 4 This is a schematic diagram of the inlet valve.

[0021] Figure 5 This is a schematic diagram of the liquid outlet valve.

[0022] Figure 6 This is a schematic diagram of the proportional valve inside the inlet valve.

[0023] Figure 7 This is a schematic diagram of a cone-shaped structure.

[0024] Figure 8 This is a schematic diagram of the battery module.

[0025] Figure 9 This is an exploded view of the battery module.

[0026] Figures 1 to 9 middle: 1-First cooling section, 2-Second cooling section, 3-Burst column, 4-First temperature sensor, 5-Second temperature sensor, 6-Inlet valve, 7-Outlet valve, 8-Proportional valve, 9-Conical structure; 11-First flow channel, 21-Second flow channel, 61-First inlet end, 62-First outlet end, 63-Second outlet end, 71-Third outlet end, 72-Second inlet end, 73-Third inlet end; 111 - Protrusion, 112 - Recess. Detailed Implementation

[0027] This application provides a cooling plate that at least solves the problem of temperature gradients in the battery pack caused by the cooling plate cooling the battery pack, affecting the battery pack capacity and service life, and even posing safety hazards. This application also provides a battery pack including the aforementioned cooling plate.

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] The battery pack includes a housing, a cover, and battery modules. The housing and cover form a cavity to house the battery modules. Each battery module includes multiple cell groups, and each cell group consists of multiple cells such as... Figure 8 and Figure 9 The battery cell F shown is formed by stacking layers along the thickness direction of the battery cell.

[0030] like Figures 1 to 7As shown, this application embodiment provides a cooling plate disposed on one side of a battery module and used to cool the battery module. That is, a cooling medium flows through the cooling plate to cool the battery module, allowing the battery module to be used within a suitable temperature range. The cooling plate mainly includes a first cooling section 1 and a second cooling section 2. The first cooling section 1 is disposed in the middle of the battery module in a first direction, and is used to cool the middle portion of the battery module, which refers to the central region of the battery module in the first direction. The second cooling section 2 is disposed at both ends of the first cooling section 1 in the first direction, and is used to cool the ends of the battery module, which refers to both ends of the battery module in the first direction. The first direction is either the length direction or the width direction of the battery module; that is, the first direction can be the length direction of the battery module, such as... Figure 1 The direction indicated by the double-headed arrow X can also be the width direction of the battery module, such as... Figure 1 The direction indicated by the double-headed arrow Y; in the embodiments of this application, the first direction is... Figure 1 The following explanation uses the direction indicated by the double-headed arrow Y as an example. Furthermore, the flow channel density of the first cooling section 1 is greater than that of the second cooling section 2. In other words, the flow channels of the first cooling section 1 located on the cooling plate are more densely arranged, while those of the second cooling section 2 located on the cooling plate are more sparsely arranged. Thus, the denser flow channels in the first cooling section 1 result in a longer flow path and flow time for the cooling medium within the first cooling section 1, leading to better cooling of the battery cells located in the middle of the battery module. Conversely, the sparser flow channels in the second cooling section 2 result in a shorter flow path and flow time for the cooling medium within the second cooling section 2, leading to poorer cooling of the battery cells at the ends of the battery module. It should be noted that the better cooling effect of the first cooling section 1 on the corresponding area of ​​the battery module is relative to the second cooling section 2, and correspondingly, the poorer cooling effect of the second cooling section 2 on the corresponding area of ​​the battery module is relative to the first cooling section 1.

[0031] Specifically, when the battery pack is in operation, the temperature of the battery module rises due to the charging and discharging of the cells. At this time, the cooling plates are activated. A first cooling plate with higher cooling efficiency is used to cool the hotter central region of the battery module, while a second cooling plate with lower efficiency is used to cool the cooler end regions. This ensures that the cooling efficiency of different areas of the cooling plate matches the temperature of different areas of the battery module. This configuration minimizes the temperature difference between the central and end regions of the cooled battery module, avoiding significant temperature gradients and ensuring that different regions of the battery module operate within a similar temperature range, thus improving the stability of the battery module during operation.

[0032] The cooling plate with the above structure has a greater cooling effect on the middle region of the battery module than on the ends of the battery module by the first cooling section 1. Since the middle of the battery module has a higher temperature and the ends have a lower temperature, when the cooling plate is used to cool the battery module, the first cooling section 1, with its higher cooling effect, cools the higher-temperature middle region of the battery module, while the second cooling section 2, with its lower cooling effect, cools the lower-temperature end region. This ensures that the cooling efficiency of the cooling plate matches the temperature of the battery module, thereby avoiding significant temperature gradients in the battery module, improving the consistency of cell degradation, increasing the usable capacity and cycle life of the battery pack, and ultimately enhancing the safety of the battery pack during use.

[0033] In some embodiments, please refer to Figure 1 and Figure 2 The first cooling section 1 includes a first flow channel 11, and the second cooling section 2 includes a second flow channel 21. The first flow channel 11 is a bent flow channel, and the second flow channel 21 is a linear flow channel. Specifically, by setting the first flow channel 11 as a bent flow channel, the flow time of the cooling medium within the first flow channel 11 is longer. This allows the cooling medium to more effectively cool the central region of the battery module when flowing through the first flow channel 11, thus further improving the cooling effect of the first cooling section 1 on the central region of the battery module. Furthermore, by setting the second flow channel 21 as a linear flow channel, the flow time of the cooling medium within the second flow channel 21 is shorter, resulting in a smaller pressure drop and lower flow resistance. This means that when the cooling medium flows through the second flow channel 21 to cool the ends of the battery module, the flow velocity of the cooling medium within the linear flow channel is faster, resulting in a lower cooling effect on the ends of the battery module when flowing through the second flow channel 21 compared to the cooling efficiency on the central region when flowing through the first flow channel 11. This configuration ensures that the cooling efficiency of different areas of the cooling plate matches the temperature of different areas of the battery module, thereby further reducing the temperature difference between different areas of the battery module.

[0034] In some embodiments, please refer to Figure 1 and Figure 2In the first direction, multiple first flow channels 11 are arranged sequentially. Having multiple first flow channels 11 allows for a denser arrangement of the flow channels in the first cooling section 1, further improving the cooling efficiency of the first cooling section 1 for the middle part of the battery module. Furthermore, having multiple first flow channels 11, compared to having only one, allows for more precise control of the flow path of the cooling medium, reducing the loss of cold energy in the cooling medium. Additionally, both ends of adjacent first flow channels 11 are connected; this arrangement provides more flow paths for the cooling medium flowing through the first flow channels 11, enabling the cooling medium to flow more efficiently within the first flow channels 11, further improving the cooling efficiency of the first cooling section 1 for the middle part of the battery module; moreover, this also facilitates the arrangement of the inlet and outlet of the first cooling section 1.

[0035] Further details based on the above embodiments can be found in the following examples. Figure 1 and Figure 2 The diameter of the first flow channel 11 is smaller than the diameter of the second flow channel 21. That is, by setting the diameter of the first flow channel 11 located in the first cooling section 1 to be smaller, the first flow channels 11 are arranged more densely, thereby increasing the heat exchange area between the cooling medium and the battery module when the cooling medium flows through the first flow channel 11, and increasing the flow rate of the cooling medium in the first flow channel 11, thereby further increasing the cooling efficiency of the first cooling section 1 for the middle part of the battery module.

[0036] Please refer to Figure 1 and Figure 2 Multiple second flow channels 21 located on one side of the first flow channel 11 in the first direction can also be provided. The ends of adjacent second flow channels 21 are connected. For example, multiple second flow channels 21 are arranged in parallel. This can further improve the flow efficiency of the cooling medium in the second flow channel 21, further increase the difference between the flow velocity of the cooling medium in the first flow channel 11 and the flow velocity in the second flow channel 21, and further expand the difference in cooling efficiency between the first cooling section 1 and the second cooling section 2 for different areas of the battery module, thereby making the temperature of different areas of the battery module in the working state more uniform.

[0037] In some embodiments, please refer to Figure 1 Each first flow channel 11 includes a protrusion 111 and a recess 112, with the protrusion 111 of one adjacent first flow channel 11 extending into the recess 112 of the other. That is to say, Figure 1 The protrusion 111 of the first flow channel 11 located on the upper side ( Figure 1 The area indicated by the middle arrow A) extends into the recess 112 located on the lower side of the first flow channel 11. Figure 1 (as shown in region B), and Figure 1 The protrusion 111 of the first flow channel 11 located on the lower side ( Figure 1The area indicated by the middle arrow C) extends into the recess 112 of the first flow channel 11 located on the upper side. Figure 1 (Area shown in D). This arrangement allows two adjacent first flow channels 11 to form a double-layered nested serpentine flow channel, further increasing the density of the first flow channels 11 and improving the cooling efficiency of the first cooling section 1 for the middle of the battery module. In other words, the adjacent first flow channels 11 are arranged in a nested manner, which makes the multiple first flow channels 11 more compact compared to a simple curved flow channel arrangement.

[0038] In some embodiments, please refer to Figure 1 and Figure 2 A turbulence column 3 is provided in the bend area of ​​the first flow channel 11. When the cooling medium flows through the location of the turbulence column 3 in the first flow channel 11, the turbulence column 3 affects the flow state of the cooling medium, thereby disrupting and rebuilding the boundary, enhancing the turbulence intensity of the cooling medium, increasing the heat transfer coefficient of the cooling medium, and thus improving the heat transfer efficiency of the first cooling section 1 for the middle part of the battery module. Furthermore, the cross-sectional shape of the turbulence column 3 is elliptical. When the cooling medium flows in the first flow channel 11 to the location of the turbulence column 3, the asymmetric characteristics of the elliptical turbulence column 3 induce vortices in the cooling medium, thereby enhancing the mixing degree between the cooling media. This increases the temperature mixing between the cooling media, thereby increasing the temperature uniformity of the cooling media in different parts of the first flow channel 11, and thus enabling the first cooling section 1 to cool different parts of the battery module more uniformly.

[0039] In some embodiments, please refer to Figure 3The first cooling section 1 is equipped with a first temperature sensor 4, and / or the second cooling section 2 is equipped with a second temperature sensor 5. Specifically, the first temperature sensor 4 is used to detect the temperature of the cooling medium flowing through the first cooling section 1 in real time, and the second temperature sensor 5 is used to detect the temperature of the cooling medium flowing through the second cooling section 2 in real time. With this configuration, by using the first temperature sensor 4 and the second temperature sensor 5 to detect the temperature of different areas of the cooling section, when the temperature detected by the first temperature sensor 4 exceeds a target position, the flow rate of the cooling medium flowing into the first cooling section 1 can be increased, thereby reducing the temperature of the cooling medium in the first cooling section 1 to ensure that the temperature of the middle area of ​​the battery module is within the target temperature range. Correspondingly, when the temperature detected by the second temperature sensor 5 exceeds a target position, the flow rate of the cooling medium flowing into the second cooling section 2 can be increased, thereby reducing the temperature of the cooling medium in the second cooling section 2 to ensure that the temperature of the end area of ​​the battery module is within the target temperature range. In summary, the above-mentioned configuration facilitates the adjustment of the flow rate of the cooling medium into the first cooling section 1 and the second cooling section 2, further reducing the temperature difference between the cooling medium in the first cooling section 1 and the second cooling section 2, thereby reducing the temperature difference between the middle and the end of the battery module, so as to achieve better thermal balance in different areas of the battery module.

[0040] In some embodiments, please refer to Figure 4 and Figure 5 The cooling plate includes an inlet valve 6 and an outlet valve 7. The inlet valve 6 includes a first inlet end 61 and a first outlet end 62 and a second outlet end 63, both of which are connected to the first inlet end 61. The first outlet end 62 is connected to the inlet of the first flow channel 11. Figure 1 The area indicated by the middle arrow a) is connected, and the second outlet end 63 is connected to the inlet of the second flow channel 21. Figure 1 (The area indicated by arrow b) is connected; that is, the cooling medium of the uncooled battery flows into the first flow channel 11 of the first cooling section 1 and into the second flow channel 21 of the second cooling section 2 through the first outlet end 62 and the second outlet end 63 of the inlet valve 6, respectively. The outlet valve 7 includes a third outlet end 71 and a second inlet end 72 and a third inlet end 73 that are both connected to the third outlet end 71. The second inlet end 72 is connected to the outlet of the first flow channel 11 ( Figure 1 The area indicated by the middle arrow c) is connected, and the third inlet end 73 is connected to the outlet of the second flow channel 21. Figure 1(The area indicated by arrow d) is connected; that is, the cooling medium that has cooled the battery is discharged from the first flow channel 11 of the first cooling section 1 and the second flow channel 21 of the second cooling section 2 through the outlet valve 7. This arrangement allows for more convenient introduction of the cooling medium into the first flow channel 11 and the second flow channel 21, and more convenient discharge of the cooling medium that has completed heat exchange within the first flow channel 11 and the second flow channel 21; furthermore, this arrangement allows for a more streamlined arrangement of the inlet valve 6 and the outlet valve 7 in the cooling plate, thus simplifying the overall cooling plate layout. Furthermore, the separate settings for the inlet flow rate of the first cooling section 1 and the second cooling section 2 allow for more precise regulation of the flow rate of the cooling medium flowing into the first cooling section 1 and the second cooling section 2.

[0041] In addition, by setting the inlet valve 6 and outlet valve 7 as described above, it is possible to ensure that the cooling medium enters the first cooling section 1 and the second cooling section 2 together. After the cooling medium has cooled the battery, it is discharged from the diagonally opposite outlet. This extends the flow path and ensures that the cooling medium is fully utilized throughout the cooling plate.

[0042] Further details based on the above embodiments can be found in the following examples. Figure 2 , Figure 4 and Figure 5 The first outlet end 62 and the second outlet end 63 of the inlet valve 6 are arranged along the first direction and are close to each other, which facilitates the arrangement of the first outlet end 62 and the second outlet end 63. Correspondingly, the second inlet end 72 and the third inlet end 73 of the outlet valve 7 are arranged along the first direction and are close to each other, which also facilitates the arrangement of the second inlet end 72 and the third inlet end 73. Specifically, the cooling medium passes through the first inlet end 61 of the inlet valve 6 and the inlet of the first flow channel 11. Figure 2 The portion of the cooling medium (indicated by arrow a) is introduced into the first flow channel 11, where a portion flows through multiple first flow channels 11 and then to the outlet of the first flow channel 11. Figure 2 The area indicated by the middle arrow c) is finally discharged through the second inlet 72 and the third outlet 71 of the outlet valve 7; the remaining cooling medium flows through a portion of the first flow channel 11 to the second flow channel 21 located on one side of the first flow channel 11 and then to the outlet of the second flow channel 21. Figure 2 The area indicated by the middle arrow d) is finally discharged through the third inlet 73 and the third outlet 71 of the outlet valve 7. The cooling medium passes through the second inlet 72 of the inlet valve 6 and the inlet of the second flow channel 21 ( Figure 2The cooling medium (as indicated by arrow b) is introduced into the second flow channel 21. The cooling medium flows through the second flow channel 21, located on the other side of the first flow channel 11. The cooling medium exiting the second flow channel 21 flows through a portion of the first flow channel 11 towards its outlet. Figure 2 (The area indicated by arrow c) Finally, the cooling medium is discharged through the second inlet 72 and the third outlet 7 of the outlet valve 7. This arrangement allows the cooling medium to flow more fully within the first flow channel 11 and the second flow channel 21, thereby improving the flow efficiency of the cooling medium and thus improving the cooling efficiency of the cooling plate for the battery module.

[0043] Specifically, the second direction is the direction perpendicular to the first direction. Figure 1 As indicated by the double-headed arrow X, the first outlet end 62 of the inlet valve 6 and the second inlet end 72 of the outlet valve 7 are located at opposite ends of the second direction; and the second outlet end 63 of the inlet valve 6 and the third inlet end 73 of the outlet valve 7 are located at opposite ends of the second direction. This arrangement facilitates the placement of the inlet valve 6 and the outlet valve 7, enabling the cooling medium to flow efficiently in various parts of the first flow channel 11 and the second flow channel 21, further improving the cooling efficiency of the cooling plate for the battery module.

[0044] In some embodiments, please refer to Figure 1 and Figure 2 The ends of the first flow channel 11 and the second flow channel 21 are connected; since the two ends of the adjacent first flow channels 11 are connected in the above embodiment, this arrangement allows the adjacent first flow channels 11 and the second flow channel 21 in the cooling plate to be connected, enabling the cooling medium to flow efficiently within the first flow channels 11 and the second flow channel 21, thereby improving the cooling efficiency of the cooling plate for the battery module; and when the cooling medium flows within the first flow channels 11 and the second flow channel 21, dead zones in the flow of the cooling medium are avoided, thus preventing the cooling medium from remaining in a localized area of ​​the cooling plate and avoiding the formation of a continuous hot zone at a certain location in the battery module.

[0045] In some embodiments, please refer to Figure 6 A proportional valve 8 is installed at the first liquid inlet 61, which controls the liquid inlet flow rate of the liquid inlet valve 6. Specifically, the proportional valve 8 controls the liquid inlet flow rate by adjusting its opening. When the overall cooling plate heat dissipation efficiency is low, the proportional valve 8 automatically increases its opening to increase the flow rate of the cooling medium into the cooling plate, thereby improving the cooling plate's heat dissipation efficiency; conversely, the proportional valve 8 decreases its opening to reduce the flow rate of the cooling medium into the cooling plate. This design facilitates the adjustment of the flow rate of the cooling medium into the cooling plate, thereby facilitating the adjustment of the cooling plate's cooling efficiency and improving the balance of battery pack thermal management.

[0046] In some embodiments, please refer to Figure 6 The inlet valve 6 is a three-way proportional valve. Specifically, a regulating valve is installed inside the inlet valve 6. Figure 6 As shown in component E, by adjusting the opening degree of different parts of the regulating valve, the opening degree between the first inlet end 61 and the first outlet end 62, as well as the opening degree between the first inlet end 61 and the second outlet end 63, of the inlet valve 6 can be adjusted, thereby distributing the cooling medium flowing into the inlet valve 6 and regulating the amount of cooling medium flowing into the first cooling section 1 and the second cooling section 2. With this configuration, by setting the inlet valve 6 as a three-way proportional valve, the amount of cooling medium flowing into the first cooling section 1 and the second cooling section 2 can be efficiently regulated based on the temperature of the first cooling section 1 detected by the first temperature sensor 4 and the temperature of the second cooling section 2 detected by the second temperature sensor 5, thereby efficiently distributing the cooling medium flow rate.

[0047] For example, please refer to Figure 7 The three-way proportional valve includes a conical structure 9 disposed within the inlet valve 6. The smaller cross-sectional area of ​​the conical structure 9 mates with the first outlet end 62 and the second outlet end 63. The opening area of ​​the conical structure 9 changes with the displacement of the valve core. Different angles of the conical structure 9 result in different opening degrees for the first outlet end 62 and the second outlet end 63. Different flow distributions are achieved through precise valve core displacement to meet different heat dissipation requirements.

[0048] In some embodiments, the cooling plate is an aluminum alloy structure, which gives the cooling plate good thermal conductivity and improves the cooling efficiency of the cooling plate for the battery module; and the aluminum alloy structure has a lower density, making it easier to achieve a lighter battery pack.

[0049] This application also provides a battery pack, please refer to [link / reference]. Figure 8 and Figure 9 The battery pack includes a cooling plate as described above, the battery pack includes a battery module, the battery module includes a cell group arranged along a first direction, and the cell group includes a plurality of cells stacked along a direction perpendicular to the first direction.

[0050] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0051] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0052] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0053] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0054] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0055] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A cooling plate, characterized in that, Located on one side of the battery module and used for cooling the battery module, including: A first cooling section (1) is disposed in the middle of the battery module in a first direction, and the first cooling section (1) is used to cool the middle of the battery module; The second cooling section (2) is disposed at both ends of the first cooling section (1) in the first direction, and the second cooling section (2) is used to cool the ends of the battery module; Wherein, the first direction is the length direction or width direction of the battery module, and the flow channel arrangement density of the first cooling part (1) is greater than the flow channel arrangement density of the second cooling part (2); the first cooling part (1) includes a first flow channel (11), the second cooling part (2) includes a second flow channel (21), the first flow channel (11) is a bent flow channel, and the second flow channel (21) is a linear flow channel.

2. The cooling plate according to claim 1, characterized in that, In the first direction, multiple first channels (11) are arranged in sequence, and the two ends of adjacent first channels (11) are connected.

3. The cooling plate according to claim 2, characterized in that, The cross-sectional area of ​​the first flow channel (11) is smaller than the cross-sectional area of ​​the second flow channel (21).

4. The cooling plate according to claim 2, characterized in that, Each of the first flow channels (11) includes a protrusion (111) and a recess (112), with the protrusion (111) of one of the adjacent first flow channels (11) extending into the recess (112) of the other.

5. The cooling plate according to claim 1, characterized in that, A turbulence column (3) is provided in the bend area of ​​the first flow channel (11), and the cross-sectional shape of the turbulence column (3) is elliptical.

6. The cooling plate according to claim 1, characterized in that, The first cooling section (1) is provided with a first temperature sensor (4), and / or the second cooling section (2) is provided with a second temperature sensor (5).

7. The cooling plate according to claim 1, characterized in that, include: The inlet valve (6) includes a first inlet end (61), a first outlet end (62) and a second outlet end (63) that are both connected to the first inlet end (61). The first outlet end (62) is connected to the inlet of the first flow channel (11), and the second outlet end (63) is connected to the inlet of the second flow channel (21). The liquid outlet valve (7) includes a third liquid outlet end (71) and a second liquid inlet end (72) and a third liquid inlet end (73) that are both connected to the third liquid outlet end (71). The second liquid inlet end (72) is connected to the outlet of the first flow channel (11), and the third liquid inlet end (73) is connected to the outlet of the second flow channel (21).

8. The cooling plate according to claim 7, characterized in that, The ends of the first flow channel (11) and the second flow channel (21) are connected.

9. The cooling plate according to claim 7, characterized in that, The first liquid inlet end (61) is provided with a proportional valve (8), which controls the liquid inlet volume of the liquid inlet valve.

10. The cooling plate according to claim 7, characterized in that, The inlet valve (6) is a three-way proportional valve.

11. A battery pack, characterized in that, The battery pack includes a cooling plate as described in any one of claims 1-10, and the battery pack includes a battery module, the battery module including a cell group arranged along the first direction, the cell group including a plurality of cells stacked along a direction perpendicular to the first direction.

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