Cooling plate, cooling assembly, battery pack and vehicle

Abstract

The present application relates to the field of vehicle technology, and in particular to a cooling plate, a cooling assembly, a battery pack and a vehicle. The cooling plate provided in the present application includes a cooling plate body, the cooling plate body includes a first side plate and a second side plate located on both sides of the cooling plate body in the thickness direction, the cooling plate body is formed with a first flow channel and a second flow channel, the first flow channel and the second flow channel are arranged at intervals; the first flow channel and the second flow channel are both U-shaped structures; the first side plate is provided with a first liquid inlet connected to one end of the first flow channel, and the second side plate is provided with a first liquid outlet connected to the other end of the first flow channel; the first side plate is provided with a second liquid inlet connected to one end of the second flow channel, and the second side plate is provided with a second liquid outlet connected to the other end of the second flow channel. When the cooling plate is used to cool the battery, it can effectively reduce the battery temperature and the overall temperature difference of the battery.

Description

Technical Field

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

[0002] Liquid cooling is to remove the heat generated by the battery through convective heat transfer of liquid media. It has high heat transfer efficiency, large heat capacity, and compact structure. It can meet the heat dissipation needs of batteries in most working conditions and is a more common method in current engineering applications. However, with the increase in the energy density of power batteries and the increasing demand for high-rate fast charging performance, the heat dissipation problem is becoming increasingly severe. The liquid cooling thermal management system faces increasing challenges and needs to further optimize the heat transfer performance and reduce the battery temperature and temperature difference to improve product reliability. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a cooling plate, a cooling assembly, a battery pack and a vehicle.

[0004] The present application provides a cooling plate, comprising: a cooling plate body,

[0005] The cooling plate body comprises a first side plate and a second side plate located at both sides of the cooling plate body in a thickness direction, the cooling plate body is formed with a first flow channel and a second flow channel, and the first flow channel and the second flow channel are arranged at intervals;

[0006] The first flow channel and the second flow channel are both U-shaped structures;

[0007] The first side plate is provided with a first liquid inlet connected to one end of the first flow channel, and the second side plate is provided with a first liquid outlet connected to the other end of the first flow channel;

[0008] The first side plate is provided with a second liquid inlet connected to one end of the second flow channel, and the second side plate is provided with a second liquid outlet connected to the other end of the second flow channel.

[0009] Further, the first flow channel includes a first sub-flow channel, a second sub-flow channel and a first separator located between the first sub-flow channel and the second sub-flow channel, the first separator is connected to the first side plate and the second side plate respectively, the first separator extends along the length direction of the cooling plate body, and an end of the first sub-flow channel away from the first liquid inlet is connected to an end of the second sub-flow channel away from the first liquid inlet to form a U-shaped structure;

[0010] The first side plate is provided with a first connection port, the first connection port is communicated with the first sub-channel and the second sub-channel respectively, the second side plate is provided with a second connection port, the second connection port is arranged opposite to the first connection port;

[0011] The first connection port is provided with a first blocking member, the first blocking member covers the second sub-flow channel area and is respectively connected to the first partition member and the first side plate;

[0012] The second connection port is provided with a second blocking member, which covers the first sub-channel area and is respectively connected to the first partition and the second side plate.

[0013] Further, the second flow channel includes a third sub-flow channel, a fourth sub-flow channel and a second partition located between the third sub-flow channel and the fourth sub-flow channel, the second partition is connected to the first side plate and the second side plate respectively, the second partition extends along the length direction of the cooling plate body, and an end of the third sub-flow channel away from the second liquid inlet is connected to an end of the fourth sub-flow channel away from the second liquid inlet to form a U-shaped structure;

[0014] The first side plate is provided with a third connection port, the third connection port is communicated with the third sub-flow channel and the fourth sub-flow channel respectively, the second side plate is provided with a fourth connection port, the fourth connection port is arranged opposite to the third connection port;

[0015] The third connection port is provided with a third blocking member, the third blocking member covers the third sub-flow channel area and is respectively connected to the second partition member and the first side plate;

[0016] The fourth connection port is provided with a fourth blocking member, which covers the fourth sub-flow channel region and is respectively connected to the second partition member and the second side plate.

[0017] Furthermore, the first sub-channel, the second sub-channel, the third sub-channel and the fourth sub-channel are arranged at intervals along the height direction of the cooling plate body;

[0018] The first blocking member is disposed on a side of the first partition member close to the second flow channel, and the third blocking member is disposed on a side of the second partition member close to the first flow channel.

[0019] Furthermore, the first blocking member includes a first plate portion and a first boss disposed on one side of the first plate portion, and the first boss is disposed at the first connecting port;

[0020] The second blocking member includes a second plate portion and a second boss disposed on one side of the second plate portion, and the second boss is disposed at the second connecting port;

[0021] The third blocking member includes a third plate portion and a third boss disposed on one side of the third plate portion, and the third boss is disposed at the third connecting port;

[0022] The fourth blocking member includes a fourth plate portion and a fourth boss disposed on one side of the fourth plate portion, and the fourth boss is disposed at the fourth connecting port.

[0023] Furthermore, a flow-deflecting structure is provided in both the first flow channel and the second flow channel. The flow-deflecting structure includes a plurality of protrusions, and the plurality of protrusions are arranged in an array.

[0024] A second aspect of the present application provides a cooling assembly, including a first cooling plate and a second cooling plate, wherein the first cooling plate and the second cooling plate are both the cooling plates described in the first aspect;

[0025] Wherein, the first liquid outlet of the first cooling plate is connected with the first liquid inlet of the second cooling plate through a first collecting pipe;

[0026] The second liquid outlet of the first cooling plate and the second liquid inlet of the second cooling plate are connected through a second collecting pipeline.

[0027] A third aspect of the present application provides a battery pack, including a battery module and the cooling assembly described in the second aspect;

[0028] The battery module comprises a plurality of battery cells, and the plurality of battery cells are stacked;

[0029] The first cooling plate and the second cooling plate are respectively disposed on both sides of a stacking direction of the plurality of battery cells.

[0030] Furthermore, a heat insulating member is provided between two adjacent battery cells.

[0031] A fourth aspect of the present application provides a vehicle comprising the battery pack described in the third aspect.

[0032] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0033] The cooling plate provided in the embodiment of the present application includes a cooling plate body, the cooling plate body includes a first side plate and a second side plate located on both sides of the cooling plate body in the thickness direction, the cooling plate body is formed with a first flow channel and a second flow channel, the first flow channel and the second flow channel are arranged at intervals; the first flow channel and the second flow channel are both U-shaped structures; the first side plate is provided with a first liquid inlet connected to one end of the first flow channel, and the second side plate is provided with a first liquid outlet connected to the other end of the first flow channel; the first side plate is provided with a second liquid inlet connected to one end of the second flow channel, and the second side plate is provided with a second liquid outlet connected to the other end of the second flow channel. In the embodiment of the present application, the first flow channel and the second flow channel can be connected in parallel. When used, the coolant enters from the first liquid inlet and flows out from the first liquid outlet through the first flow channel, and at the same time, the coolant enters from the second liquid inlet and flows out from the second liquid outlet through the second flow channel. When the cooling plate is used to cool the battery, the battery temperature and the overall temperature difference of the battery can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1 This is a schematic diagram of the structure of the battery pack described in the embodiment of the present application;

[0037] Figure 2 An exploded view of the battery pack described in an embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of the structure of the cooling plate described in the embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of the structure of the first flow channel and the second flow channel in the cooling plate according to the embodiment of the present application;

[0040] Figure 5 This is a schematic diagram of the structure of the blocking member and the water nozzle in the cooling plate according to the embodiment of the present application;

[0041] Figure 6 This is a schematic structural diagram of a first blocking member in a cooling plate according to an embodiment of the present application;

[0042] Figure 7 This is a schematic diagram of the side structure of the cooling plate described in the embodiment of the present application;

[0043] Figure 8 This is a structural schematic diagram of the position of the cooling plate sealing member according to the embodiment of the present application;

[0044] Fig. 9 Another structural schematic diagram of the first flow channel and the second flow channel in the cooling plate according to the embodiment of the present application;

[0045] Fig.10 This is a schematic diagram of the structure of one end of the cooling plate described in an embodiment of the present application;

[0046] Fig.11 This is a schematic diagram of the structure of the other end of the cooling plate described in the embodiment of the present application;

[0047] Fig.12 Another structural schematic diagram of the position of the cooling plate sealing member described in an embodiment of the present application.

[0048] Figure numerals: 1. cooling plate body; 11. first side plate; 111. first liquid inlet; 112. second liquid inlet; 113. first connecting port; 113a. first blocking member; 113b. first plate portion; 113c. first boss; 114. third connecting port; 114a. third blocking member; 12. second side plate; 123a. second blocking member; 124a. fourth blocking member; 13. first flow channel; 131. first sub-flow channel; 132. second sub-flow channel; 133. first partition; 14. second flow channel; 141. third sub-flow channel; 142. fourth sub-flow channel; 143. second partition; 2. battery cell; 31. first collecting pipeline; 32. second collecting pipeline; 41. first water nozzle; 42. second water nozzle; 43. third water nozzle; 44. fourth water nozzle; 5. thermal insulation member; 6. deflection flow structure. DETAILED DESCRIPTION

[0049] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0051] Combination Figures 1 to 12 As shown, the cooling plate provided in the embodiment of the present application includes a cooling plate body 1, the cooling plate body 1 includes a first side plate 11 and a second side plate 12 located on both sides of the cooling plate body 1 in the thickness direction, the cooling plate body 1 is formed with a first flow channel 13 and a second flow channel 14, the first flow channel 13 and the second flow channel 14 are arranged at intervals; the first flow channel 13 and the second flow channel 14 are both U-shaped structures; the first side plate 11 is provided with a first liquid inlet 111 connected to one end of the first flow channel 13, and the second side plate 12 is provided with a first liquid outlet connected to the other end of the first flow channel 13; the first side plate 11 is provided with a second liquid inlet 112 connected to one end of the second flow channel 14, and the second side plate 12 is provided with a second liquid outlet connected to the other end of the second flow channel 14. In the embodiment of the present application, the first flow channel 13 and the second flow channel 14 can be connected in parallel. When in use, the coolant enters from the first liquid inlet 111, flows through the first flow channel 13, and flows out from the first liquid outlet. At the same time, the coolant enters from the second liquid inlet 112, flows through the second flow channel 14, and flows out from the second liquid outlet. When the cooling plate is used to cool the battery, it can effectively reduce the temperature of the battery and the overall temperature difference of the battery.

[0052] The first flow channel 13 and the second flow channel 14 are two-way parallel connection and are independent of each other. The height of the cooling plate body 1, the number of the first flow channel 13 and the second flow channel 14, and the width of the first flow channel 13 and the second flow channel 14 can be adjusted according to the cooling requirements and the system flow resistance. The length and number of the cooling plate body 1 can be adjusted according to the battery pack power and the battery cell arrangement.

[0053] The coolant flow can be as follows Fig. 9 shown.

[0054] In some specific embodiments, the first channel 13 includes a first sub-channel 131, a second sub-channel 132 and a first partition 133 located between the first sub-channel 131 and the second sub-channel 132, the first partition 133 is respectively connected to the first side plate 11 and the second side plate 12, the first partition 133 extends along the length direction of the cooling plate body 1, and an end of the first sub-channel 131 away from the first liquid inlet 111 is connected to an end of the second sub-channel 132 away from the first liquid inlet 111 to form a U-shaped structure.

[0055] The first side plate 11 is provided with a first connecting port 113, and the first connecting port 113 is used to connect with the first water nozzle 41. The first connecting port 113 is communicated with the first sub-channel 131 and the second sub-channel 132 respectively. The second side plate 12 is provided with a second connecting port, and the second connecting port is arranged opposite to the first connecting port 113; the first connecting port 113 is provided with a first blocking member 113a, and the first blocking member 113a can be plate-shaped or sheet-shaped. The first blocking member 113a covers the second sub-channel 132 area and is respectively connected with the first partition 133 and the first side plate 11, so that the coolant can enter the first sub-channel 131 from the first liquid inlet 111 formed in the area of ​​the first connecting port 113 that is not closed by the first blocking member 113a after entering from the first water nozzle 41.

[0056] The second connecting port is provided with a second blocking member 123a, which may be in the shape of a plate or a sheet. The second blocking member 123a covers the area of ​​the first sub-channel 131 and is respectively connected to the first partition member 133 and the second side plate 12, so that the coolant flows from the first sub-channel 131 into the second sub-channel 132, and finally flows out through the second water nozzle 42 from the first liquid outlet formed in the area of ​​the second connecting port that is not closed by the second blocking member 123a.

[0057] In some specific embodiments, the second channel 14 includes a third sub-channel 141, a fourth sub-channel 142 and a second partition 143 located between the third sub-channel 141 and the fourth sub-channel 142, the second partition 143 is respectively connected to the first side plate 11 and the second side plate 12, the second partition 143 extends along the length direction of the cooling plate body 1, and an end of the third sub-channel 141 away from the second liquid inlet 112 is connected to an end of the fourth sub-channel 142 away from the second liquid inlet 112 to form a U-shaped structure.

[0058] The first side plate 11 is provided with a third connection port 114 , which is communicated with the third sub-channel 141 and the fourth sub-channel 142 respectively. The second side plate 12 is provided with a fourth connection port, which is arranged opposite to the third connection port 114 .

[0059] The third connecting port 114 is provided with a third blocking piece 114a. The third blocking piece 114a may be in the shape of a plate or a sheet. The third blocking piece 114a covers the third sub-channel 141 area and is respectively connected to the second partition 143 and the first side plate 11, so that after the coolant enters from the third water nozzle 43, it can enter the fourth sub-channel 142 from the second liquid inlet 112 formed in the area of ​​the third connecting port 114 that is not closed by the third blocking piece 114a.

[0060] The fourth connecting port is provided with a fourth blocking piece 124a, which covers the fourth sub-channel 142 area and is respectively connected to the second partition 143 and the second side plate 12, so that the coolant enters the third sub-channel 141 from the fourth sub-channel 142, and finally flows out through the fourth water nozzle 44 from the second liquid outlet formed in the area of ​​the fourth connecting port not closed by the fourth blocking piece 124a.

[0061] In order to make the upper and lower first flow channels 13 and the second flow channels 14 of the cooling plate independent of each other and the flow channels between the cooling plates connected in series, the coolant can be guided by adding a semicircular first blocking member 113a, a second blocking member 123a, a third blocking member 114a and a fourth blocking member 124a.

[0062] In this embodiment, the liquid inlet includes a first liquid inlet 111 and a second liquid inlet 112, and the liquid outlet includes a first liquid outlet and a second liquid outlet, that is, there are two liquid inlets and two liquid outlets, and the first flow channel 13 and the second flow channel 14 are connected in parallel, and the flow directions are opposite, which can effectively reduce the temperature difference of the battery during the charging and discharging process, and can quickly increase the flow of the liquid cooling system when thermal runaway occurs, slowing down the heat diffusion rate. The cooling system formed by the cooling plate has high cooling efficiency. When used for battery cooling, the battery temperature consistency is good, which can effectively meet the cooling requirements under high-rate charging and discharging conditions, and ensure product reliability and safety.

[0063] In some specific embodiments, the first sub-channel 131, the second sub-channel 132, the third sub-channel 141 and the fourth sub-channel 142 are arranged at intervals along the height direction of the cooling plate body 1; the first blocking member 113a is arranged on the side of the first partition 133 close to the second channel 14, and the third blocking member 114a is arranged on the side of the second partition 143 close to the first channel 13. The first channel 13 and the second channel 14 are connected in parallel with opposite flow directions, which can effectively reduce the temperature difference of the battery during the charging and discharging process, and can quickly increase the flow rate of the liquid cooling system when thermal runaway occurs, slowing down the heat diffusion rate. The cooling system formed by the cooling plate has high cooling efficiency. When used for battery cooling, the battery temperature consistency is good, which can effectively meet the cooling requirements under high-rate charging and discharging conditions, and ensure product reliability and safety.

[0064] In some specific embodiments, the first blocking member 113a includes a first plate portion 113b and a first boss 113c arranged on one side of the first plate portion 113b, and the first boss 113c is arranged at the first connecting port 113, so as to facilitate the first blocking member 113a to fit with the first water nozzle 41; the second blocking member 123a includes a second plate portion and a second boss arranged on one side of the second plate portion, and the second boss is arranged at the second connecting port, so as to facilitate the second blocking member 123a to fit with the second water nozzle 42; the third blocking member 114a includes a third plate portion and a third boss arranged on one side of the third plate portion, and the third boss is arranged at the third connecting port 114, so as to facilitate the third blocking member 114a to fit with the third water nozzle 43; the fourth blocking member 124a includes a fourth plate portion and a fourth boss arranged on one side of the fourth plate portion, and the fourth boss is arranged at the fourth connecting port, so as to facilitate the fourth blocking member 124a to fit with the fourth water nozzle 44.

[0065] In some specific embodiments, a flow-deflecting structure 6 is provided in both the first flow channel 13 and the second flow channel 14. The flow-deflecting structure 6 includes a plurality of protrusions arranged in an array, which can increase the turbulence intensity of the coolant flowing in the flow channel, improve the convective heat transfer coefficient, and increase the heat exchange area between the coolant and the cooling plate. The flow-deflecting structure can be a cylinder, a square column, or other shapes.

[0066] Optionally, the protrusions are columnar, and the columnar array structure can increase the turbulence intensity of the coolant flowing in the flow channel, improve the convective heat transfer coefficient, and at the same time increase the heat exchange area between the coolant and the cooling plate. In this case, a cylindrical shape is used with a diameter of 1.5mm and a height of 1.5mm. The recommended diameter is 0.8-3mm and the height is 1-6mm. The cooling plate, the blocking block and the faucet are all made of aluminum alloy. The cooling plate material is preferably 6 series aluminum with a thickness of 1-1.5mm and a flow channel width of 2-3mm. The aluminum profile cooling plate closes the front and rear of the cooling plate through the end blocking blocks, and welds the faucet so that the profile cavity forms a complete flow channel to facilitate the circulation of the coolant.

[0067] The cooling assembly provided in the embodiment of the present application includes a first cooling plate and a second cooling plate, and the first cooling plate and the second cooling plate are both cooling plates provided in the embodiment of the present application; wherein, the first liquid outlet of the first cooling plate is connected to the first liquid inlet 111 of the second cooling plate through the first collecting pipe 31; the second liquid outlet of the first cooling plate is connected to the second liquid inlet 112 of the second cooling plate through the second collecting pipe 32. The first cooling plate and the second cooling plate are connected in series through the first collecting pipe 31 and the second collecting pipe 32, which can effectively reduce the temperature difference of the battery during the charging and discharging process, and can quickly increase the flow rate of the liquid cooling system when thermal runaway occurs, slowing down the heat diffusion rate. The cooling system formed by the cooling plate has high cooling efficiency. When used for battery cooling, the battery temperature consistency is good, which can effectively meet the cooling requirements under high-rate charging and discharging conditions, and ensure product reliability and safety.

[0068] The first collecting pipe 31 and the second collecting pipe 32 can be made of nylon or rubber.

[0069] The battery pack provided in the embodiment of the present application includes a battery module and a cooling assembly provided in the embodiment of the present application; the battery module includes a plurality of battery cells 2, and the plurality of battery cells 2 are stacked; the first cooling plate and the second cooling plate are respectively arranged on both sides of the stacking direction of the plurality of battery cells 2. The temperature difference of the battery during the charging and discharging process can be effectively reduced, and when thermal runaway occurs, the flow rate of the liquid cooling system can be quickly increased to slow down the heat diffusion rate. The cooling system formed by the cooling plate has high cooling efficiency. When used for battery cooling, the battery temperature consistency is good, which can effectively meet the cooling requirements under high-rate charging and discharging conditions, and ensure product reliability and safety.

[0070] In some specific embodiments, a heat insulating member 5 is provided between two adjacent battery cells 2 .

[0071] The heat insulating member 5 can be made of a vacuum insulation panel (VIP) material. The composite material has a low thermal conductivity (0.002W / mK), good heat insulation effect, and certain compressibility. It also has heat insulation and buffering effects. A vacuum insulation panel (VIP) material can be placed between each large surface of the battery, or a vacuum insulation panel (VIP) material can be placed between the large surfaces of every two battery cells 2. The specific situation depends on the battery system and design scheme. The liquid inlet includes a first liquid inlet 111 and a second liquid inlet 112, and the liquid outlet includes a first liquid outlet and a second liquid outlet, that is, there are two liquid inlets and two liquid outlets. The first flow channel 13 and the second flow channel 14 are connected in parallel, and the flow directions are opposite, which can effectively reduce the battery temperature difference during the charge and discharge process, and can quickly increase the flow of the liquid cooling system when thermal runaway occurs, slowing down the heat diffusion rate. The cooling system formed by the cooling plate has high cooling efficiency. When used for battery cooling, the battery temperature consistency is good, which can effectively meet the cooling requirements under high-rate charge and discharge conditions, and ensure product reliability and safety.

[0072] Optionally, the insulation member 5 formed by the vacuum insulation panel material may be plate-shaped or sheet-shaped, and the thickness of the insulation member 5 is between 1 and 4 mm. The main base materials are the vacuum insulation panel and the packaging material, and the packaging material may be an aluminum-plastic film or ceramic fiber cloth.

[0073] The vehicle provided in the embodiment of the present application includes the battery pack provided in the embodiment of the present application. Since the vehicle provided in the embodiment of the present application has the same advantages as the battery pack provided in the embodiment of the present application, they will not be described in detail here.

[0074] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0075] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling plate, characterized in that: include: cooling plate body, The cooling plate body comprises a first side plate and a second side plate located at both sides of the cooling plate body in a thickness direction, the cooling plate body is formed with a first flow channel and a second flow channel, and the first flow channel and the second flow channel are arranged at intervals; The first flow channel and the second flow channel are both U-shaped structures; The first side plate is provided with a first liquid inlet connected to one end of the first flow channel, and the second side plate is provided with a first liquid outlet connected to the other end of the first flow channel; The first side plate is provided with a second liquid inlet connected to one end of the second flow channel, and the second side plate is provided with a second liquid outlet connected to the other end of the second flow channel.

2. The cooling plate according to claim 1, characterized in that The first flow channel includes a first sub-flow channel, a second sub-flow channel and a first separator located between the first sub-flow channel and the second sub-flow channel, the first separator is connected to the first side plate and the second side plate respectively, the first separator extends along the length direction of the cooling plate body, and an end of the first sub-flow channel away from the first liquid inlet is connected to an end of the second sub-flow channel away from the first liquid inlet to form a U-shaped structure; The first side plate is provided with a first connection port, the first connection port is communicated with the first sub-channel and the second sub-channel respectively, the second side plate is provided with a second connection port, the second connection port is arranged opposite to the first connection port; The first connection port is provided with a first blocking member, the first blocking member covers the second sub-flow channel area and is respectively connected to the first partition member and the first side plate; The second connection port is provided with a second blocking member, which covers the first sub-channel area and is respectively connected to the first partition and the second side plate.

3. The cooling plate according to claim 2, characterized in that The second flow channel includes a third sub-flow channel, a fourth sub-flow channel and a second partition located between the third sub-flow channel and the fourth sub-flow channel, the second partition is connected to the first side plate and the second side plate respectively, the second partition extends along the length direction of the cooling plate body, and an end of the third sub-flow channel away from the second liquid inlet is connected to an end of the fourth sub-flow channel away from the second liquid inlet to form a U-shaped structure; The first side plate is provided with a third connection port, the third connection port is communicated with the third sub-flow channel and the fourth sub-flow channel respectively, the second side plate is provided with a fourth connection port, the fourth connection port is arranged opposite to the third connection port; The third connection port is provided with a third blocking member, the third blocking member covers the third sub-flow channel area and is respectively connected to the second partition member and the first side plate; The fourth connection port is provided with a fourth blocking member, which covers the fourth sub-flow channel region and is respectively connected to the second partition member and the second side plate.

4. The cooling plate according to claim 3, characterized in that The first sub-channel, the second sub-channel, the third sub-channel and the fourth sub-channel are arranged at intervals along the height direction of the cooling plate body; The first blocking member is disposed on a side of the first partition member close to the second flow channel, and the third blocking member is disposed on a side of the second partition member close to the first flow channel.

5. The cooling plate according to claim 3, characterized in that The first blocking member includes a first plate portion and a first boss disposed on one side of the first plate portion, and the first boss is disposed at the first connecting port; The second blocking member includes a second plate portion and a second boss disposed on one side of the second plate portion, and the second boss is disposed at the second connecting port; The third blocking member includes a third plate portion and a third boss disposed on one side of the third plate portion, and the third boss is disposed at the third connecting port; The fourth blocking member includes a fourth plate portion and a fourth boss disposed on one side of the fourth plate portion, and the fourth boss is disposed at the fourth connecting port.

6. The cooling plate according to claim 1, characterized in that A deflection flow structure is provided in both the first flow channel and the second flow channel. The deflection flow structure includes a plurality of protrusions, and the plurality of protrusions are arranged in an array.

7. A cooling assembly, characterized in that: Comprising: a first cooling plate and a second cooling plate, wherein the first cooling plate and the second cooling plate are the cooling plates according to any one of claims 1 to 6; Wherein, the first liquid outlet of the first cooling plate is connected with the first liquid inlet of the second cooling plate through a first collecting pipe; The second liquid outlet of the first cooling plate and the second liquid inlet of the second cooling plate are connected through a second collecting pipeline.

8. A battery pack, characterized in that: Comprising a battery module and the cooling assembly according to claim 7; The battery module comprises a plurality of battery cells, and the plurality of battery cells are stacked; The first cooling plate and the second cooling plate are respectively disposed on both sides of a stacking direction of the plurality of battery cells.

9. The battery pack according to claim 8, characterized in that: A heat insulating member is provided between two adjacent battery cells.

10. A vehicle, characterized in that: Comprising the battery pack as described in claim 8 or 9.

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