Cold plate, cooling system, battery pack and electric device

Abstract

The present application relates to the technical field of batteries, and provides a cold plate, a cooling system, a battery pack, and an electric device. The cold plate comprises a plate body, the plate body is provided with a first flow channel and a second flow channel which are separated from each other, and the first flow channel surrounds at least a portion of the second flow channel. One of the first flow channel and the second flow channel in the plate body may allow a refrigerant to flow therethrough, and the other of the first flow channel and the second flow channel may allow a coolant to flow therethrough, so that both the refrigerant and the coolant may flow through the cold plate. The refrigerant and the coolant in the cold plate can sufficiently exchange heat by means of an inner wall structure in the cold plate. In this way, when the temperature of the coolant is relatively high, the refrigerant flowing through the cold plate can also absorb heat from the coolant, so that the temperature of the coolant is reduced, thereby enhancing the temperature uniformity of the cold plate, and enabling the cold plate to provide a more sufficient and uniform cooling effect for a battery module.

Description

Cold plates, cooling systems, battery packs and electrical equipment

[0001] This application claims priority to Chinese patent application filed on April 16, 2025, with application number 202510481996.0 and entitled "Cold Plate, Cooling System, Battery Pack and Electrical Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to a cold plate, a cooling system, a battery pack, and electrical equipment, and relates to the field of battery technology. Background Technology

[0003] The cold plate is an important component in the battery pack. The battery pack may generate a lot of heat during charging and discharging. By delivering a cooling medium into the cold plate, the heat of the battery pack can be absorbed and carried away, so that the battery pack can be charged and discharged at a safe temperature.

[0004] Currently, the cold plate of the battery pack adopts a direct cooling structure. The flow channel inside the cold plate is designed to allow the refrigerant to flow through. The air conditioning system generates low-temperature refrigerant to cool the battery pack. However, this cooling method has high energy consumption, especially when the cooling demand of the battery pack is relatively small. Summary of the Invention

[0005] This application provides a cold plate, a cooling system, a battery pack, and an electrical device to solve the problem of high energy consumption required for battery cooling in related technologies.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a cold plate, comprising:

[0008] The plate has a first flow channel and a second flow channel separated by phase, the first flow channel surrounding at least a portion of the second flow channel, one of the first flow channel and the second flow channel being used for the flow of refrigerant and the other for the flow of coolant.

[0009] In some embodiments, the plate has a cooling surface and a heat-conducting surface facing away from each other, the cooling surface being located on the surface of the plate, and at least a portion of the heat-conducting surface being the inner wall of the first flow channel and the inner wall of the second flow channel.

[0010] In some embodiments, the first flow channel includes a plurality of first sub-flow channels connected in sequence, with adjacent first sub-flow channels arranged at an angle;

[0011] The second flow channel includes a plurality of second sub-flow channels connected in sequence, with adjacent second sub-flow channels arranged at an angle.

[0012] In some implementations, a plurality of first sub-channels enclose a plurality of second sub-channels.

[0013] In some implementations, at least one first sub-channel encloses a plurality of second sub-channels.

[0014] In some embodiments, the plate body includes a bottom plate portion and an outer plate portion, the outer plate portion being stacked on the bottom plate portion, and the first flow channel being located between the outer plate portion and the bottom plate portion.

[0015] In some embodiments, the outer plate portion has a first flow channel groove, and the bottom plate portion seals the opening of the first flow channel groove to form the first flow channel.

[0016] In some embodiments, the plate body further includes a clamping plate portion stacked on the bottom plate portion and located between the outer plate portion and the bottom plate portion, and the second flow channel is located between the clamping plate portion and the bottom plate portion.

[0017] In some embodiments, the clamping plate portion has a second flow channel groove, and the bottom plate portion seals the opening of the second flow channel groove to form the second flow channel.

[0018] In some embodiments, the clamping plate portion is spaced apart from the inner wall of the first flow channel groove.

[0019] In some embodiments, the plate body further has a first liquid inlet, a first liquid outlet, a second liquid inlet, and a second liquid outlet, wherein the first liquid inlet and the first liquid outlet are both connected to the first flow channel, and the second liquid inlet and the second liquid outlet are both connected to the first flow channel.

[0020] In some embodiments, the first liquid inlet, the first liquid outlet, the second liquid inlet, and the second liquid outlet are all located on the same side of the plate.

[0021] In some embodiments, the first liquid inlet, the first liquid outlet, the second liquid inlet, and the second liquid outlet are all located on the bottom plate.

[0022] Secondly, based on the cold plate mentioned above, this application also provides a cooling system for cooling a battery module. The cooling system includes a liquid cooling component, an air conditioning component, and the cold plate mentioned above.

[0023] The air conditioning component is cyclically connected to one of the first flow channel and the second flow channel, and the liquid cooling component is cyclically connected to the other of the first flow channel and the second flow channel.

[0024] In some embodiments, the air conditioning component is circulatedly connected to the first flow channel, and the liquid cooling component is circulatedly connected to the second flow channel.

[0025] In some embodiments, the cooling system further includes a connector through which the air conditioning assembly is connected to the first flow channel, and the liquid cooling assembly is connected to the second flow channel through the connector.

[0026] In some embodiments, the connector has a first circulation inlet, a first circulation outlet, a second circulation inlet, and a second circulation outlet, wherein the first circulation inlet and the first circulation outlet are both connected to the air conditioning assembly, and the second circulation inlet and the second circulation outlet are both connected to the liquid cooling assembly.

[0027] The connector also has a first flow channel inlet, a first flow channel outlet, a second flow channel inlet, and a second flow channel outlet, wherein the first flow channel inlet and the first flow channel outlet are both connected to the first flow channel, and the second flow channel inlet and the second flow channel outlet are both connected to the second flow channel.

[0028] In some embodiments, the connector further has two first flow channel inlets and two second flow channel inlets, with both first flow channel inlets connected to the first flow channel and both second flow channel inlets connected to the second flow channel.

[0029] In some embodiments, the cooling system further includes a detection element and a control element, the detection element being electrically connected to the control element, and both the air conditioning assembly and the liquid cooling assembly being electrically connected to the control element;

[0030] The detection device is configured to detect the temperature of the battery module;

[0031] The control unit is configured to control the air conditioning assembly to circulate refrigerant into the first flow channel and / or control the liquid cooling assembly to circulate coolant into the second flow channel based on the temperature of the battery module.

[0032] In some embodiments, the detection element is also configured to detect the temperature of various parts of the battery module;

[0033] When the detection device detects that the highest temperature of the battery module is higher than the first temperature, the control device controls the air conditioning assembly to circulate refrigerant into the first flow channel, and / or,

[0034] The liquid cooling assembly is controlled to circulate and deliver coolant to the second flow channel.

[0035] In some embodiments, the detection element is also configured to detect the ambient temperature of the battery module and the temperature of the coolant in the liquid cooling assembly;

[0036] When the ambient temperature of the battery module is lower than the second temperature, and the temperature of the coolant in the liquid cooling assembly is lower than the third temperature, the controller controls the liquid cooling assembly to circulate and deliver coolant into the second flow channel.

[0037] In some implementations, when the ambient temperature of the battery module is not lower than the second temperature and the temperature of the coolant in the liquid cooling assembly is not lower than the third temperature, the controller controls the air conditioning assembly to circulate and deliver refrigerant into the first flow channel, and controls the liquid cooling assembly to circulate and deliver coolant into the second flow channel.

[0038] In some implementations, when the minimum temperature of the battery module is lower than the fourth temperature and the temperature of the coolant in the liquid cooling assembly is higher than the fifth temperature, the controller controls the liquid cooling assembly to circulate and deliver coolant into the second flow channel.

[0039] In some embodiments, the cooling system further includes a heating element electrically connected to the control element, the control element being configured to control the heating element to heat the battery module.

[0040] In some implementations, when the lowest temperature of the battery module is below a fourth temperature and the temperature of the coolant in the liquid cooling assembly is not higher than a fifth temperature, the controller controls the heating element to heat the battery module.

[0041] Thirdly, based on the cooling system described above, this application also provides a battery pack, including a battery module and the cooling system described above, wherein the battery module is thermally connected to the cold plate.

[0042] Fourthly, based on the battery pack described above, this application also provides an electrical device including the battery pack described above.

[0043] In the cold plate provided in this application, one of the first and second flow channels within the plate can carry refrigerant, while the other can carry coolant, allowing both refrigerant and coolant to flow through the cold plate. When the battery module temperature is high, low-temperature refrigerant can be supplied to one of the first and second flow channels to sufficiently lower the battery module temperature. When the battery module temperature rise is small, low-temperature coolant can be supplied to the other of the first and second flow channels to sufficiently lower the battery module temperature while also reducing the energy consumption required to cool the battery module. The first flow channel encloses at least part of the second flow channel, giving the cold plate an inner wall structure that separates the first and second flow channels. The refrigerant and coolant within the cold plate can exchange heat effectively through this inner wall structure. Thus, when the coolant temperature is high, the refrigerant flowing through the cold plate can also absorb heat from the coolant, lowering the coolant temperature and enhancing the temperature uniformity of the cold plate, resulting in a more thorough and balanced cooling effect on the battery module. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 is a schematic diagram of the cold plate provided in an embodiment of this application;

[0046] Figure 2 is a schematic diagram showing that the cold plate provided in the embodiment of this application has two first sub-channels;

[0047] Figure 3 is a schematic diagram of the exploded structure of the cold plate provided in the embodiment of this application;

[0048] Figure 4 is a schematic diagram of the cooling system provided in an embodiment of this application;

[0049] Figure 5 is a schematic diagram of the electrical connections of the cooling system provided in an embodiment of this application;

[0050] Figure 6 is a schematic diagram of the connectors of the cooling system provided in an embodiment of this application;

[0051] Figure 7 is a schematic diagram of the battery pack provided in an embodiment of this application.

[0052] Explanation of reference numerals in the attached drawings: 20-Cooling system; 30-Battery pack; 100-Plate body; 110-Bottom plate; 111-First liquid inlet; 112-First liquid outlet; 113-Second liquid inlet; 114-Second liquid outlet; 115-Cooling surface; 116-Heat-conducting surface; 120-Outer plate; 121-First flow channel groove; 130-Clamping plate; 131-Second flow channel groove; 140-First flow channel; 141-First sub-flow channel; 150-Second flow channel; 151-Second sub-flow channel; 200-Air conditioning assembly; 300-Liquid cooling assembly; 400-Connector; 410-First circulation inlet; 420-First circulation outlet; 430-Second circulation inlet; 440-Second circulation outlet; 450-First flow channel inlet; 460-First flow channel outlet; 470-Second flow channel inlet; 480-Second flow channel outlet; 500 - Inspection component; 600 - Control component; 700 - Battery module; 800 - Heating component. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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.

[0054] The cold plate is an important component in the battery pack. The battery pack may generate a lot of heat during charging and discharging. By delivering a cooling medium into the cold plate, the heat of the battery pack can be absorbed and carried away, so that the battery pack can be charged and discharged at a safe temperature.

[0055] Currently, the cold plate of the battery pack adopts a direct cooling structure. The flow channel inside the cold plate is designed to allow the refrigerant to flow through. The air conditioning system generates low-temperature refrigerant to cool the battery pack. However, this cooling method has high energy consumption, especially when the cooling demand of the battery pack is relatively small.

[0056] Therefore, some cold plates employ a dual-channel structure, where one channel carries cooling water and the other carries refrigerant. In this type of cold plate, the two channels are parallel, preventing heat exchange between the cooling media within them.

[0057] In the cold plate proposed in this application, one of the first and second flow channels within the plate can carry refrigerant, while the other can carry coolant, allowing both refrigerant and coolant to flow through the cold plate. When the battery module temperature is high, low-temperature refrigerant can be supplied to one of the first and second flow channels to sufficiently lower the battery module temperature. When the battery module temperature rise is small, low-temperature coolant can be supplied to the other of the first and second flow channels to sufficiently lower the battery module temperature while also reducing the energy consumption required to cool the battery module. The first flow channel encloses at least part of the second flow channel, giving the cold plate an inner wall structure that separates the first and second flow channels. The refrigerant and coolant within the cold plate can exchange heat effectively through this inner wall structure. Thus, when the coolant temperature is high, the refrigerant flowing through the cold plate can also absorb heat from the coolant, lowering the coolant temperature and enhancing the temperature uniformity of the cold plate, resulting in a more thorough and balanced cooling effect on the battery module.

[0058] The cooling system proposed in this application, including the aforementioned cold plate, provides a better cooling effect for the battery module.

[0059] The battery pack proposed in this application includes the aforementioned cooling system, which reduces the energy consumption for cooling during charging and discharging, and ensures a more uniform temperature across different parts of the battery pack.

[0060] The electrical equipment proposed in this application includes the aforementioned battery pack, which makes the operation of the electrical equipment more stable and reliable.

[0061] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0062] This application provides a cold plate, as shown in FIG1, including a plate body 100. The plate body 100 is the basic component of the cold plate of this application, providing a mounting base for at least some other components of the cold plate and protecting them. The plate body 100 can be made of a metallic material, giving it better structural strength, thus improving its durability and reliability. Furthermore, the metallic material of the plate body 100 provides it with better thermal conductivity.

[0063] The plate 100 has a first flow channel 140 and a second flow channel 150, which are independent cavity structures within the plate 100. Specifically, the plate 100 has a solid structure separating the first flow channel 140 and the second flow channel 150, and the opposite sides of this solid structure can respectively form the inner walls of the first flow channel 140 and the second flow channel 150. One of the first flow channel 140 and the second flow channel 150 can be used for the flow of refrigerant, and the other can be used for the flow of coolant, so that the refrigerant and coolant can be selectively delivered to the cold plate. The plate 100 can be used to contact the battery module 700 in the battery pack 30, and the heat generated by the battery module 700 can be absorbed by the refrigerant and / or coolant flowing through the plate 100, thereby reducing the temperature of the battery module 700.

[0064] Specifically, one of the first flow channel 140 and the second flow channel 150 can be used to circulate the refrigerant, and the other of the first flow channel 140 and the second flow channel 150 can be used to circulate the coolant. In this way, after the refrigerant and coolant absorb the heat from the battery module 700 in the battery pack 30, they can be circulated out of the cold plate and, after being cooled, transported back into the cold plate to absorb the heat from the battery module 700.

[0065] To allow refrigerant and coolant to circulate through the first flow channel 140 of the plate 100, the plate 100 may also be provided with a first liquid inlet 111 and a first liquid outlet 112. Both the first liquid inlet 111 and the first liquid outlet 112 of the plate 100 are connected to the first flow channel 140. The first liquid inlet 111 of the plate 100 may also be connected to an external first cooling device, through which the first cooling device can supply coolant or refrigerant to the first flow channel 140. The first liquid outlet 112 of the plate 100 may also be connected to an external first cooling device, through which the coolant and refrigerant in the first flow channel 140 can be discharged and circulated back to the first cooling device.

[0066] The plate 100 may also be provided with a second liquid inlet 113 and a second liquid outlet 114. Both the second liquid inlet 113 and the second liquid outlet 114 of the plate 100 are connected to the second flow channel 150. The second liquid inlet 113 of the plate 100 may also be connected to an external second cooling device, through which the second cooling device can supply coolant or refrigerant to the second flow channel 150. The second liquid outlet 114 of the plate 100 may also be connected to an external second cooling device, through which the coolant and refrigerant in the second flow channel 150 can be discharged and circulated back to the second cooling device.

[0067] Specifically, when the refrigerant circulates through the first flow channel 140, the coolant circulates through the second flow channel 150. When the coolant circulates through the first flow channel 140, the refrigerant circulates through the second flow channel 150.

[0068] At least a portion of the outer wall of the battery module 700 can be in contact with the outer wall of the cold plate, so that the heat generated by the battery module 700 can be conducted to the outer wall of the cold plate and then to the first flow channel 140 and the second flow channel 150 where it is absorbed by the coolant and refrigerant, thereby dissipating the heat of the battery module 700 and reducing the temperature of the battery module 700.

[0069] When the temperature of the battery module 700 is high, a low-temperature refrigerant can be circulated and supplied to one of the first flow channels 140 and 150 through the first cooling device. The refrigerant has a relatively lower temperature and can absorb more heat. Even when the battery module 700's temperature is high, the refrigerant can still effectively absorb the heat, allowing the battery module 700's temperature to drop to a safe operating temperature. When the temperature increase of the battery module 700 is small, coolant can be circulated and supplied to the other of the first flow channels 140 and 150. The coolant can absorb less heat than the refrigerant, but supplying coolant consumes less energy than supplying the low-temperature refrigerant. This allows the temperature of the battery module 700 to be sufficiently reduced while also reducing the energy consumption required to cool the battery module 700.

[0070] The first flow channel 140 encloses at least a portion of the second flow channel 150. The refrigerant in the first flow channel 140 and the coolant in the second flow channel 150 can exchange heat effectively through the solid structure within the cold plate located between the first flow channel 140 and the second flow channel 150. Thus, when the coolant temperature is high, the refrigerant within the cold medium can absorb heat from the coolant, lowering the coolant temperature and enhancing the temperature uniformity of the cold plate. This results in a more thorough and balanced cooling effect on the battery module 700.

[0071] Specifically, the first flow channel 140 and the second flow channel 150 are distributed in different areas within the cold plate. When the battery module 700 contacts the cold plate, the cooling medium in the first flow channel 140 and the second flow channel 150 can correspond to different parts of the battery module 700. The coolant and refrigerant in the first flow channel 140 and the second flow channel 150 exchange heat with each other, ensuring that the heat of each part of the battery module 700 in contact with the cold plate can be fully absorbed by the cooling medium in the refrigerant, thereby enhancing the temperature uniformity of the cold plate.

[0072] The first flow channel 140 encloses at least part of the second flow channel 150 and can also increase the heat exchange area between the first flow channel 140 and the second flow channel 150. In this way, the cooling medium in the first flow channel 140 and the second flow channel 150 can exchange heat with each other more fully. Correspondingly, the refrigerant can absorb the heat of the coolant more fully, so that the temperature of the coolant can be reduced more fully.

[0073] In some embodiments, referring to FIG1, the plate 100 of this application has a cooling surface 115 and a heat-conducting surface 116 facing away from each other. The cooling surface 115 is located on the surface of the plate 100 and can contact the battery module 700. Specifically, the shape and size of the cooling surface 115 can be matched with the shape and size of the battery module 700, so that the battery module 700 can fully contact the cooling surface 115. The heat-conducting surface 116 is located inside the cooling plate, and at least a portion of the heat-conducting surface 116 is the inner wall of the first flow channel 140 and the inner wall of the second flow channel 150.

[0074] When the battery module 700 comes into contact with the cooling surface 115 of the plate 100, the heat of the battery module 700 can be conducted to the cold plate through the cooling surface 115, and then conducted to the cooling medium in the first flow channel 140 and the cooling medium in the second flow channel 150 through the heat-conducting surface 116. This allows the cooling medium in the first flow channel 140 and the cooling medium in the second flow channel 150 to directly exchange heat with the battery module 700, thereby improving the efficiency of the cooling medium in the first flow channel 140 and the cooling medium in the second flow channel 150 in absorbing the heat of the battery module 700.

[0075] In some embodiments, the second flow channel 150 of this application is located within the first flow channel 140. The first flow channel 140 of the cold plate is used for circulating refrigerant, and the second flow channel 150 of the cold plate is used for circulating coolant. By placing the second flow channel 150 within the first flow channel 140, the heat exchange area between the first flow channel 140 and the second flow channel 150 is further increased, thereby enabling more thorough heat exchange between the cooling medium in the first flow channel 140 and the cooling medium in the second flow channel 150.

[0076] It should be understood that since the second flow channel 150 is located within the first flow channel 140, the volume of the first flow channel 140 is relatively larger than that of the second flow channel 150. Thus, at the same flow rate, the flow rate of the refrigerant flowing through the first flow channel 140 is greater than the flow rate of the coolant flowing through the second flow channel 150, thereby making the cold plate absorb the battery module 700 more effectively, so that the battery temperature can be reduced more fully.

[0077] In some embodiments, referring to FIG3, the first flow channel 140 of the cold plate in this application may be configured to include a plurality of first sub-flow channels 141 connected in sequence, with adjacent first sub-flow channels 141 arranged at an angle. This can extend the length of the first flow channel 140 and increase the distribution range of the first flow channel 140. Specifically, some of the first sub-flow channels 141 may be arranged along the length direction of the cold plate, and some of the first sub-flow channels 141 may be arranged along the width direction of the cold plate. A portion of the plurality of first sub-flow channels 141 may be distributed along the length direction of the cold plate, and a portion of the plurality of first sub-flow channels 141 may also be distributed along the width direction of the cold plate. This ensures that each part of the cold plate is provided with a first flow channel 140, thereby increasing the amount of refrigerant delivered to the first flow channel 140, and allowing the refrigerant to fully absorb the heat from each part of the battery module 700.

[0078] In this application, the second flow channel 150 of the cold plate can be configured to include multiple sequentially connected second sub-flow channels 151, with adjacent second sub-flow channels 151 arranged at an angle. This extends the length of the second flow channel 150 and increases its distribution range. Specifically, some of the second sub-flow channels 151 can be arranged along the length direction of the cold plate, and some can be arranged along the width direction of the cold plate. A portion of the multiple second sub-flow channels 151 can be distributed along the length direction of the cold plate, and a portion of the multiple second sub-flow channels 151 can also be distributed along the width direction of the cold plate. This ensures that each part of the cold plate is provided with a second flow channel 150, thereby increasing the amount of coolant delivered to the second flow channel 150, allowing the coolant to fully absorb the heat from various parts of the battery module 700.

[0079] In some embodiments, referring to FIG3, the plurality of second sub-channels 151 of this application are respectively disposed in the plurality of first sub-channels 141, so that the refrigerant in each first sub-channel 141 can exchange heat with the coolant in the corresponding second sub-channel 151, thereby further improving the heat exchange efficiency between the refrigerant in the first channel 140 and the coolant in the second channel 150.

[0080] In some embodiments, referring to FIG2, in the plurality of first sub-channels 141 of this application, at least one first sub-channel 141 is provided with a plurality of second sub-channels 151. Correspondingly, the number of second sub-channels 151 is greater than the number of first sub-channels 141, thereby making the length of the second sub-channels 150 longer and the distribution range larger. This can improve the heat exchange effect between the coolant in the second sub-channel 150 and the battery module 700, allowing the coolant in the second sub-channel 150 to absorb more heat from the battery module 700.

[0081] In addition, multiple second sub-channels 151 located within the same first sub-channel 141 can be spaced apart to increase the heat exchange area between the multiple second sub-channels 151 and the first sub-channel 141, and to a certain extent avoid mutual heat exchange between the coolants in the multiple second sub-channels 151.

[0082] In some embodiments, referring to Figures 1 to 3, in order to form a first flow channel 140 within the plate body 100, the plate body 100 may include a bottom plate portion 110 and an outer plate portion 120, with the outer plate portion 120 stacked on the bottom plate portion 110, and the first flow channel 140 located between the outer plate portion 120 and the bottom plate portion 110. Specifically, the outer plate portion 120 and the bottom plate portion 110 surround to form the first flow channel 140, and the opposing portions of the outer plate portion 120 and the bottom plate portion 110 constitute the inner wall of the first flow channel 140.

[0083] By forming a first flow channel 140 by assembling the bottom plate portion 110 and the outer plate portion 120, the structure of the plate body 100 can be simplified. By preparing the bottom plate portion 110 and the outer plate portion 120 separately and then assembling them, the manufacturing process difficulty of the plate body 100 can be reduced, thereby reducing the manufacturing cost of the cold plate of this application.

[0084] Specifically, the projection area formed by the outer plate portion 120 on the bottom plate portion 110 in the direction toward the bottom plate portion 110 can coincide with the bottom plate portion 110, thereby making the structure of the cold plate of this application more compact.

[0085] In some embodiments, referring to FIG3, in order to form a first flow channel 140 between the bottom plate portion 110 and the outer plate portion 120, the outer plate portion 120 is provided with a first flow channel groove 121, the first flow channel groove 121 having an opening on the side of the outer plate portion 120 facing the bottom plate portion 110. The bottom plate portion 110 blocks the opening of the first flow channel groove 121, thereby forming the first flow channel 140 by the bottom plate portion 110 and the outer plate portion 120.

[0086] Specifically, when the first flow channel groove 121 is formed on the outer plate portion 120, the outer plate portion 120 has a corresponding protruding structure on the side facing away from the opening of the first flow channel groove 121. This allows the outer plate portion 120 to have the first flow channel groove 121 while having a relatively thin size, thereby making the structure of the outer plate portion 120 more compact, and thus making the thickness of the cold plate of this community thinner and the structure more compact.

[0087] The outer plate 120 can be made of metal, and a first flow channel groove 121 can be formed on the outer plate 120 by a stamping process. This can reduce the manufacturing cost of the outer plate 120, thereby reducing the manufacturing cost of the cold plate of this application.

[0088] In some embodiments, referring to Figures 1 to 3, the plate body 100 of this application may further include a clamping plate portion 130, which is stacked on the bottom plate portion 110 and disposed between the bottom plate portion 110 and the outer plate portion 120. A second flow channel 150 is located between the bottom plate portion 110 and the clamping plate portion 130. Specifically, the outer plate portion 120 is stacked on top of the clamping plate portion 130, facing away from the clamping plate portion 130 and the bottom plate portion 110, forming the second flow channel 150. The opposing outer walls of the clamping plate portion 130 and the bottom plate portion 110 constitute the inner wall of the second flow channel 150.

[0089] By forming a second flow channel 150 by arranging the base plate portion 110 and the clamping plate portion 130, the structure of the plate body 100 can be simplified. By preparing the clamping plate portion 130 separately and then assembling it with the base plate portion 110 and the outer plate portion 120, the manufacturing process difficulty of the plate body 100 can be reduced, thereby reducing the manufacturing cost of the cold plate of this application.

[0090] Specifically, the projection area of ​​the clamping plate portion 130 on the base plate portion 110 in the direction toward the base plate portion 110 can coincide with the base plate portion 110. Correspondingly, the clamping plate portion 130 and the base plate portion 110 are also arranged to coincide, thereby making the structure of the cold plate of this application more compact.

[0091] In some embodiments, referring to FIG3, in order to form a second flow channel 150 between the base plate portion 110 and the clamping plate portion 130, the clamping plate portion 130 is provided with a second flow channel groove 131, the second flow channel groove 131 having an opening on the side of the clamping plate portion 130 facing the base plate portion 110. The base plate portion 110 blocks the opening of the second flow channel groove 131, thereby forming the second flow channel 150 by the base plate portion 110 and the clamping plate portion 130.

[0092] Specifically, when the second flow channel groove 131 is formed in the clamping plate portion 130, the side of the clamping plate portion 130 facing away from the opening of the second flow channel groove 131 has a corresponding protruding structure. This allows the clamping plate portion 130 to have the second flow channel groove 131 while having a relatively thin size, thereby making the structure of the clamping plate portion 130 more compact, and thus making the thickness of the cold plate of this community thinner and the structure more compact.

[0093] The clamping plate 130 can be made of metal, and a second flow channel groove 131 can be formed on the clamping plate 130 by a stamping process. This can reduce the manufacturing cost of the clamping plate 130, thereby reducing the manufacturing cost of the cold plate of this application.

[0094] In some embodiments, referring to Figures 1 and 2, the clamping plate portion 130 and the inner wall of the first flow channel groove 121 of the outer plate portion 120 are spaced apart, so that the clamping plate portion 130 does not contact the inner wall of the first flow channel groove 121. This prevents the clamping plate portion 130 from obstructing the first flow channel 140, allowing for smoother circulation of the refrigerant within the first flow channel 140. Furthermore, this reduces the space occupied by the clamping plate portion 130 within the first flow channel groove 121, allowing for a larger flow rate of refrigerant through the first flow channel 140, thereby improving the cooling effect of the refrigerant on the battery module 700.

[0095] In some embodiments, referring to FIG3, the first liquid inlet 111, the first liquid outlet 112, the second liquid inlet 113 and the second liquid outlet 114 of the plate 100 are all provided on the bottom plate portion 110. This eliminates the need to open additional openings on the outer plate portion 120 and the clamping plate portion 130, making it more convenient to connect the cold plate of this application to the external cooling device.

[0096] Based on the cold plate described above, and referring to Figure 4, this application also proposes a cooling system 20, including a liquid cooling assembly 300, an air conditioning assembly 200, and the cold plate described above.

[0097] The air conditioning component 200 is circulatedly connected to one of the first flow channel 140 and the second flow channel 150 within the cold plate, and the liquid cooling component 300 is circulatedly connected to the other of the first flow channel 140 and the second flow channel 150 within the cold plate. Specifically, the air conditioning component 200 can circulate refrigerant into the first flow channel 140, and the liquid cooling component 300 can circulate coolant into the second flow channel 150.

[0098] When the temperature of the battery module 700 is high, a low-temperature refrigerant can be supplied to the first internal circulation channel through the air conditioning component 200. The refrigerant has a relatively lower temperature and can absorb more heat. Even when the battery module 700's temperature is high, the refrigerant can still effectively absorb the heat, allowing the battery module 700's temperature to drop to a safe operating temperature. When the temperature increase of the battery module 700 is small, the liquid cooling component 300 can supply coolant to the second internal circulation channel 150. The coolant can absorb less heat than the refrigerant, but the power consumption of the liquid cooling component 300 is lower than that of the air conditioning component 200. This allows the temperature of the battery module 700 to be sufficiently reduced while also reducing the energy consumption of the cooling system 20 of this application.

[0099] Specifically, the air conditioning component 200 includes components such as a compressor, condenser, evaporator, expansion valve, and refrigerant piping. The compressor, condenser, evaporator, and expansion valve are all located within the refrigerant piping, which is also circulatedly connected to the first flow channel 140 of the cold plate. The compressor drives the refrigerant to flow within the refrigerant piping, and subsequently within the first flow channel 140.

[0100] The liquid cooling assembly 300 may include a water pump, a heat exchanger, and liquid cooling piping. Both the water pump and the heat exchanger are located within the liquid cooling piping, which is circulatedly connected to the second flow channel 150 of the cold plate. The water pump drives the coolant to circulate within the liquid cooling piping, and subsequently within the second flow channel 150. The heat absorbed by the coolant can be exchanged with the ambient air through the heat exchanger, allowing the absorbed heat to be dissipated into the environment.

[0101] In some embodiments, referring to FIG6, the cooling system 20 of this application may further include a connector 400. The connector is disposed on the plate 100, and the air conditioning assembly 200 and the liquid cooling assembly 300 are both circulatedly connected to the first flow channel 140 and the second flow channel 150 of the cold plate through the connector 400. The connector 400 may be disposed on the plate 100 so that the connector 400 can be fixed.

[0102] In some embodiments, referring to FIG6, the connector 400 has a first circulation inlet 410, a first circulation outlet 420, a second circulation inlet 430, and a second circulation outlet 440. The first circulation inlet 410 and the first circulation outlet 420 are both connected to the air conditioning assembly 200, and the second circulation inlet 430 and the second circulation outlet 440 are both connected to the liquid cooling assembly 300. The air conditioning assembly 200 can be cyclically connected to the connector 400 through the first circulation inlet 410 and the first circulation outlet 420, and the liquid cooling assembly 300 can be cyclically connected to the connector 400 through the second circulation inlet 430 and the second circulation outlet 440.

[0103] The connector 400 also has a first flow channel inlet 450, a first flow channel outlet 460, a second flow channel inlet 470, and a second flow channel outlet 480. Both the first flow channel inlet 450 and the first flow channel outlet 460 are connected to the first flow channel 140. Specifically, the first flow channel inlet 450 can be connected to the first liquid inlet 111 of the first flow channel 140, and the first flow channel outlet 460 can be connected to the first liquid outlet 112 of the first flow channel 140.

[0104] The second flow channel inlet 470 and the second flow channel outlet 480 are both connected to the second flow channel 150. Specifically, the second flow channel inlet 470 can be connected to the second liquid inlet 113 of the second flow channel 150, and the second flow channel outlet 480 can be connected to the second liquid outlet 114 of the second flow channel 150.

[0105] The refrigerant supplied by the air conditioning unit 200 can enter the connector 400 through the first circulation inlet 410, and then enter the first flow channel 140 through the first flow channel inlet 450 of the connector 400. After circulating in the first flow channel 140, the refrigerant can return to the connector 400 through the first flow channel outlet 460, and then return to the air conditioning unit 200 through the first circulation outlet 420.

[0106] The coolant supplied by the liquid cooling assembly 300 can enter the connector 400 through the second circulation inlet 430, and then enter the second flow channel 150 through the second flow channel inlet 470 of the connector 400. After circulating within the second flow channel 150, the coolant can return to the connector 400 through the second flow channel outlet 480, and then return to the liquid cooling assembly 300 through the second circulation outlet 440.

[0107] In some embodiments, referring to FIG6, the connector 400 may have two first flow channel inlets 450 and two second flow channel inlets 470, with both first flow channel inlets 450 connected to the first flow channel 140 and both second flow channel inlets 470 connected to the second flow channel 150. This can improve the circulation efficiency of the refrigerant and coolant.

[0108] In some embodiments, referring to FIG5, the cooling system 20 of this application may further include a detection element 500 and a control element 600. The detection element 500 is electrically connected to the control element 600. The detection element 500 is configured to detect the temperature of the battery module 700, and the control element 600 is configured to control the air conditioning assembly 200 to circulate refrigerant to the first flow channel 140 of the cold plate, and / or control the liquid cooling assembly 300 to circulate coolant to the second flow channel 150 of the cold plate, based on the temperature of the battery module 700.

[0109] Specifically, when the temperature rise of the battery module 700 is small, the detection unit 500 detects the temperature of the battery module 700 and transmits the temperature signal of the battery module 700 to the control unit 600. The control unit 600 determines that the temperature of the battery module 700 is lower than a preset temperature. The control unit 600 controls the liquid cooling assembly 300 to deliver coolant into the second flow channel 150 of the cold plate, so that the coolant absorbs the heat of the battery module 700.

[0110] When the temperature of the battery module 700 rises significantly, the detection unit 500 detects the temperature of the battery module 700 and transmits the temperature signal of the battery module 700 to the control unit 600. The control unit 600 determines that the temperature of the battery module 700 is higher than a preset temperature. The control unit 600 then controls the air conditioning component 200 to deliver refrigerant into the first flow channel 140 of the cold plate, through which the refrigerant absorbs the heat from the battery module 700.

[0111] In some embodiments, referring to FIG5, the detection element 500 of this application is configured to detect the temperature of various parts of the battery module 700. It should be understood that the battery module 700 is composed of several battery cells, and the temperature of each cell may differ during charging and discharging, resulting in different temperatures at various parts of the battery module 700. Specifically, the detection element 500 may include multiple temperature sensors, which can be located at different parts of the battery module 700, and each temperature sensor can detect the temperature of a different part of the battery module 700.

[0112] When the detection unit 500 detects that the highest temperature of various parts of the battery module 700 is higher than the first temperature, it indicates that the temperature of the battery module 700 is relatively high and the battery module 700 needs to be cooled down. The control unit 600 controls the air conditioning component 200 to circulate and deliver refrigerant into the first flow channel 140, and / or controls the liquid cooling component 300 to circulate and deliver coolant into the second flow channel 150, so as to achieve the purpose of cooling down the battery module 700.

[0113] In some embodiments, referring to FIG5, the detection element 500 of this application is also configured to detect the ambient temperature of the battery module 700 and the temperature of the coolant in the liquid cooling assembly 300.

[0114] When the ambient temperature of the battery module 700 is lower than the second temperature, and the temperature of the coolant in the liquid cooling assembly 300 is lower than the third temperature, the controller 600 controls the liquid cooling assembly 300 to circulate and deliver coolant into the second flow channel 150.

[0115] When the temperature of the coolant in the liquid cooling assembly 300 is lower than the third temperature, it indicates that the coolant temperature is relatively low, and the coolant can fully absorb the heat from the battery module 700. When the ambient temperature of the battery module 700 is lower than the second temperature, it indicates that the ambient temperature is relatively low. After absorbing the heat from the battery module 700, the coolant can dissipate heat to the environment through a heat exchanger, thereby lowering the coolant temperature. The coolant can then circulate back into the second flow channel 150 to absorb heat from the battery module 700 again. Correspondingly, the cooling system 20 does not need to turn on the air conditioning assembly 200, thus reducing the energy consumption of the cooling system 20.

[0116] In some embodiments, when the ambient temperature of the battery module 700 is not lower than the second temperature and the temperature of the coolant in the liquid cooling assembly 300 is not lower than the third temperature, the control unit 600 controls the air conditioning assembly 200 to circulate and deliver refrigerant into the first flow channel 140 and controls the liquid cooling assembly 300 to circulate and deliver coolant into the second flow channel 150.

[0117] When the temperature of the coolant in the liquid cooling assembly 300 is not lower than the third temperature, it indicates that the coolant temperature is relatively high, and the coolant cannot fully absorb the heat from the battery module 700. When the ambient temperature of the battery module 700 is not lower than the second temperature, it indicates that the ambient temperature is relatively high, and the heat from the coolant cannot be fully dissipated to the environment through the heat exchanger, resulting in a high coolant temperature. The air conditioning assembly 200 supplies refrigerant to the first flow channel 140, which can fully absorb the heat from the battery module 700, allowing the temperature of the battery module 700 to be reduced to a safe temperature. In addition, the refrigerant in the first flow channel 140 can also exchange heat with the coolant in the second flow channel 150, allowing the refrigerant to absorb the temperature of the coolant, thus reducing the coolant temperature accordingly. In this way, the coolant can also fully absorb the heat from the battery module 700, allowing the temperature of the battery module 700 to be reduced sufficiently.

[0118] In some implementations, when the detection element 500 detects that the lowest temperature of each part of the battery module 700 is lower than the fourth temperature and the temperature of the coolant in the liquid cooling assembly 300 is higher than the fifth temperature, the control element 600 controls the liquid cooling assembly 300 to circulate and deliver coolant into the second flow channel 150 to heat the battery module 700.

[0119] Specifically, when the minimum temperature of the battery module 700 is lower than the fourth temperature, it indicates that the temperature of the battery module 700 is too low, and it needs to be heated to raise the temperature of the battery module 700 to a safe temperature. When the temperature of the coolant in the liquid cooling assembly 300 is higher than the fifth temperature, it indicates that the temperature of the coolant is too high. The liquid cooling assembly 300 circulates and delivers coolant into the second flow channel 150 of the cold plate. The heat of the coolant can be conducted to the battery module 700 through the cold plate to heat the battery module 700 to a safe temperature.

[0120] In some embodiments, referring to FIG5, the cooling system 20 of this application may further include a heating element 800, which is electrically connected to a control element 600. The control element 600 can control the heating element 800 to turn on to heat the battery module 700. When the detection element 500 detects that the lowest temperature of each part of the battery module 700 is lower than a fourth temperature, and the temperature of the coolant in the liquid cooling assembly 300 is not higher than a fifth temperature, the control element 600 controls the heating element 800 to turn on to heat the battery module 700.

[0121] Specifically, when the minimum temperature of battery module 700 is lower than the fourth temperature, it indicates that the temperature of battery module 700 is too low, and it needs to be heated to raise the temperature of battery module 700 to a safe temperature. When the temperature of the coolant in liquid cooling component 300 is not higher than the fifth temperature, it indicates that the temperature of the coolant is too low, and the heat of the coolant is insufficient to raise the temperature of battery module 700 to a safe temperature. In this case, heating element 800 is used to heat the battery module 700 to a safe temperature.

[0122] Based on the cooling system 20 described above, and referring to Figure 7, this application also proposes a battery pack 30, including a battery module 700 and the cooling system 20 described above, wherein the battery pack 30 and the cooling system 20 are thermally connected. Specifically, the battery module 700 is attached to the cooling surface 115 of the plate 100.

[0123] Based on the battery pack 30 described above, this application also proposes an electrical device that includes the battery pack 30 described above. This electrical device can be a vehicle.

[0124] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0125] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0126] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0127] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cold-rolled steel plate, characterized in that, include: The plate (100) has a first flow channel (140) and a second flow channel (150) separated by phase, the first flow channel (140) surrounding at least a portion of the second flow channel (150), one of the first flow channel (140) and the second flow channel (150) being used for the flow of refrigerant and the other for the flow of coolant.

2. The cold-rolled plate according to claim 1, characterized in that, The second flow channel (150) is located within the first flow channel (140).

3. The cold-rolled plate according to claim 2, characterized in that, The plate (100) has a cooling surface (115) and a heat-conducting surface (116) facing away from each other. The cooling surface (115) is located on the surface of the plate (100), and at least part of the heat-conducting surface (116) is the inner wall of the first flow channel (140) and the inner wall of the second flow channel (150).

4. The cold-rolled plate according to claim 1, characterized in that, The first flow channel (140) includes a plurality of first sub-flow channels (141) connected in sequence, and adjacent first sub-flow channels (141) are arranged at an angle; The second flow channel (150) includes a plurality of second sub-flow channels (151) connected in sequence, with adjacent second sub-flow channels (151) arranged at an angle.

5. The cold-rolled plate according to claim 4, characterized in that, Multiple first sub-channels (141) enclose multiple second sub-channels (151).

6. The cold plate according to claim 4, characterized in that, At least one of the first sub-channels (141) encloses a plurality of the second sub-channels (151).

7. The cold-rolled plate according to any one of claims 1-6, characterized in that, The plate (100) includes a bottom plate (110) and an outer plate (120), the outer plate (120) being stacked on the bottom plate (110), and the first flow channel (140) being located between the outer plate (120) and the bottom plate (110).

8. The cold-rolled plate according to claim 7, characterized in that, The outer plate portion (120) has a first flow channel groove (121), and the bottom plate portion (110) blocks the opening of the first flow channel groove (121) to form the first flow channel (140).

9. The cold plate according to claim 8, characterized in that, The plate (100) further includes a clamping plate (130) which is stacked on the bottom plate (110) and is located between the outer plate (120) and the bottom plate (110). The second flow channel (150) is located between the clamping plate (130) and the bottom plate (110).

10. The cold plate according to claim 9, characterized in that, The clamping plate portion (130) has a second flow channel groove (131), and the bottom plate portion (110) blocks the opening of the second flow channel groove (131) to form the second flow channel (150).

11. The cold plate according to claim 10, characterized in that, The clamping plate (130) is spaced apart from the inner wall of the first flow channel (121).

12. The cold-rolled plate according to claim 7, characterized in that, The plate (100) also has a first liquid inlet (111), a first liquid outlet (112), a second liquid inlet (113), and a second liquid outlet (114). The first liquid inlet (111) and the first liquid outlet (112) are both connected to the first flow channel (140), and the second liquid inlet (113) and the second liquid outlet (114) are both connected to the first flow channel (140).

13. The cold plate according to claim 12, characterized in that, The first liquid inlet (111), the first liquid outlet (112), the second liquid inlet (113), and the second liquid outlet (114) are all located on the same side of the plate (100).

14. The cold plate according to claim 13, characterized in that, The first liquid inlet (111), the first liquid outlet (112), the second liquid inlet (113), and the second liquid outlet (114) are all located on the bottom plate (110).

15. A cooling system for cooling a battery module (700), characterized in that, It includes a liquid cooling assembly (300), an air conditioning assembly (200), and a cold plate as described in any one of claims 1-14; The air conditioning assembly (200) is cyclically connected to one of the first flow channel (140) and the second flow channel (150), and the liquid cooling assembly (300) is cyclically connected to the other of the first flow channel (140) and the second flow channel (150).

16. The cooling system according to claim 15, characterized in that, The air conditioning component (200) is cyclically connected to the first flow channel (140), and the liquid cooling component (300) is cyclically connected to the second flow channel (150).

17. The cooling system according to claim 15, characterized in that, The cooling system further includes a connector (400) disposed on the plate (100), the air conditioning component (200) is connected to the first flow channel (140) through the connector (400), and the liquid cooling component (300) is connected to the second flow channel (150) through the connector (400).

18. The cooling system according to claim 17, characterized in that, The connector (400) has a first circulation inlet (410), a first circulation outlet (420), a second circulation inlet (430), and a second circulation outlet (440). The first circulation inlet (410) and the second circulation outlet (420) are both connected to the air conditioning assembly (200), and the second circulation inlet (430) and the second circulation outlet (440) are both connected to the liquid cooling assembly (300). The connector (400) also has a first flow channel inlet (450), a first flow channel outlet (460), a second flow channel inlet (470) and a second flow channel outlet (480), the first flow channel inlet (450) and the first flow channel outlet (460) being connected to the first flow channel (140), and the second flow channel inlet (470) and the second flow channel outlet (480) being connected to the second flow channel (150).

19. The cooling system according to claim 18, characterized in that, The connector (400) also has two first flow channel inlets (450) and two second flow channel inlets (470), with both first flow channel inlets (450) connected to the first flow channel (140) and both second flow channel inlets (470) connected to the second flow channel (150).

20. The cooling system according to claim 16, characterized in that, The cooling system further includes a detection element (500) and a control element (600), the detection element (500) being electrically connected to the control element (600), and both the air conditioning assembly (200) and the liquid cooling assembly (300) being electrically connected to the control element (600). The detection element (500) is configured to detect the temperature of the battery module (700); The control unit (600) is configured to control the air conditioning assembly (200) to circulate refrigerant to the first flow channel (140) according to the temperature of the battery module (700), and / or to control the liquid cooling assembly (300) to circulate coolant to the second flow channel (150).

21. The cooling system according to claim 20, characterized in that, The detection element (500) is also configured to detect the temperature of various parts of the battery module (700); When the detection element (500) detects that the highest temperature of the battery module (700) is higher than the first temperature, the control element (600) controls the air conditioning assembly (200) to circulate refrigerant into the first flow channel (140), and / or, The liquid cooling assembly (300) is controlled to circulate and deliver coolant to the second flow channel (150).

22. The cooling system according to claim 21, characterized in that, The detection element (500) is also configured to detect the ambient temperature of the battery module (700) and the temperature of the coolant in the liquid cooling assembly (300); When the ambient temperature of the battery module (700) is lower than the second temperature, and the temperature of the coolant in the liquid cooling assembly (300) is lower than the third temperature, the control unit (600) controls the liquid cooling assembly (300) to circulate and deliver coolant into the second flow channel (150).

23. The cooling system according to claim 21, characterized in that, When the ambient temperature of the battery module (700) is not lower than the second temperature, and the temperature of the coolant in the liquid cooling assembly (300) is not lower than the third temperature, the control unit (600) controls the air conditioning assembly (200) to circulate and deliver refrigerant into the first flow channel (140), and controls the liquid cooling assembly (300) to circulate and deliver coolant into the second flow channel (150).

24. The cooling system according to claim 21, characterized in that, When the minimum temperature of the battery module (700) is lower than the fourth temperature and the temperature of the coolant in the liquid cooling assembly (300) is higher than the fifth temperature, the control unit (600) controls the liquid cooling assembly (300) to circulate and deliver coolant into the second flow channel (150).

25. The cooling system according to claim 21, characterized in that, The cooling system also includes a heating element (800) electrically connected to the control element (600), the control element (600) being configured to control the heating element (800) to heat the battery module (700).

26. The cooling system according to claim 25, characterized in that, When the lowest temperature of the battery module (700) is lower than the fourth temperature and the temperature of the coolant in the liquid cooling assembly (300) is not higher than the fifth temperature, the control unit (600) controls the heating unit (800) to heat the battery module (700).

27. A battery pack, characterized in that, It includes a battery module (700) and a cooling system as described in any one of claims 15-26, wherein the battery module (700) is thermally connected to the cold plate.

28. An electrical appliance, characterized in that, Includes the battery pack as described in claim 27.

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