Liquid cooling structure, battery pack and electric device

Abstract

The utility model provides a kind of liquid cooling structure, battery pack and electric equipment, liquid cooling structure includes liquid cooling plate, liquid cooling plate is equipped with first liquid cooling cavity and second liquid cooling cavity, first liquid cooling cavity forms first liquid cooling circuit, second liquid cooling cavity forms multiple second liquid cooling circuits, at least one second liquid cooling circuit can be independently controlled;First liquid cooling circuit can carry out macroscopic regulation to the overall temperature of battery pack, ensure that the overall temperature of battery pack is maintained in reasonable range when high-power operation;Second liquid cooling circuit can regulate and control the local temperature of battery pack, effectively reduce local temperature heat accumulation, to realize overall and local collaborative heat dissipation;And can be according to the actual heat generation and heat dissipation of different regions inside battery pack, flexibly adjust liquid cooling flow and temperature, can significantly reduce the temperature difference inside battery pack, improve the problem of uneven temperature distribution caused by the uniform distribution of flow channel of traditional liquid cooling plate, to improve the overall temperature consistency of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a liquid cooling structure, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, the flow channels at the bottom of the liquid cooling plate are evenly distributed. The liquid cooling flow rate and liquid cooling temperature in the battery pack can only regulate the overall temperature of the battery cells. However, the heat generation and heat dissipation of different areas in the battery pack are not the same. After being uniformly cooled by the liquid cooling plate, the structural differences in the local area of ​​the battery pack lead to differences in temperature heat accumulation. The internal temperature difference of the battery pack is large. The liquid cooling plate cannot respond well to the problems of high temperature or uneven temperature distribution in the battery pack caused by power changes and uneven internal heat, which is not conducive to the consistency of battery pack performance. Utility Model Content

[0003] The embodiments of this utility model provide a liquid cooling structure, a battery pack, and an electrical device, which can improve the technical problems of the liquid cooling plate not responding well to power changes and the uneven internal heat causing the battery pack to have high temperature or uneven temperature distribution.

[0004] In a first aspect, embodiments of the present invention provide a liquid cooling structure, comprising:

[0005] The liquid cooling plate has a first liquid cooling cavity and a second liquid cooling cavity arranged sequentially and at intervals along its thickness direction. The first liquid cooling cavity forms a first liquid cooling circuit, and the second liquid cooling cavity forms a plurality of second liquid cooling circuits. At least one of the second liquid cooling circuits can be independently controlled.

[0006] In some embodiments, the liquid cooling plate is used to support the battery module, and a plurality of second liquid cooling circuits are disposed on the side of the first liquid cooling circuit away from the battery module.

[0007] Thus, placing the second liquid cooling circuit on the side of the first liquid cooling circuit away from the battery module makes the heat dissipation path of the liquid cooling plate more reasonable. The first liquid cooling circuit is in direct contact with the battery module and can quickly absorb the heat generated by the battery module; while the second liquid cooling circuit is on the back of the first liquid cooling circuit, forming an auxiliary heat dissipation layer, so that heat can be absorbed and dissipated in stages, avoiding excessive heat accumulation inside the liquid cooling plate, thereby improving the overall heat dissipation efficiency.

[0008] Furthermore, the second liquid cooling circuit can be independently controlled, allowing for flexible adjustment of the liquid cooling flow rate and temperature based on the actual heat generation and heat dissipation requirements of different areas of the battery module.

[0009] In some embodiments, the liquid cooling structure further includes a plurality of solenoid valves, each of the second liquid cooling circuits being connected to one of the solenoid valves, the solenoid valves being used to control the on / off state of the corresponding second liquid cooling circuit.

[0010] Thus, each second liquid cooling circuit is equipped with a solenoid valve, which can independently control the on / off state of the second liquid cooling circuit and flexibly adjust the working state of each second liquid cooling circuit according to the actual heat generation and heat dissipation requirements of different areas of the battery module.

[0011] This also avoids unnecessary cooling of areas with low heat generation, thereby optimizing the efficiency of coolant use and reducing energy waste.

[0012] In some embodiments, the first liquid cooling circuit and the second liquid cooling circuit are at least partially staggered.

[0013] When the first liquid cooling circuit and the second liquid cooling circuit are partially staggered, the heat distribution within the liquid cooling plate is more uniform, which can avoid the phenomenon that heat is excessively concentrated in some areas and insufficiently dissipated in other areas due to the complete overlap of the first and second liquid cooling circuits.

[0014] This staggered arrangement allows heat within the liquid cooling plate to be absorbed and dissipated in stages. The first liquid cooling circuit directly contacts the battery module and absorbs heat; then, the second liquid cooling circuit further absorbs heat at an adjacent location, creating a multi-layered heat dissipation effect and improving overall heat dissipation efficiency.

[0015] In addition, by staggering the settings, the thermal resistance between the first liquid cooling circuit and the second liquid cooling circuit is effectively reduced, and heat can be conducted from the battery module to the first or second liquid cooling circuit more quickly, thereby improving heat dissipation efficiency, significantly reducing the temperature gradient inside the battery module, and ensuring that the temperature of each area of ​​the battery module is more consistent.

[0016] In some embodiments, the plurality of the second liquid cooling circuits are arranged in an array or uniformly.

[0017] This ensures a more uniform heat distribution within the liquid cooling plate, allowing each second liquid cooling cavity to effectively absorb and dissipate heat, preventing excessive heat concentration in localized areas, and thus improving the overall heat dissipation uniformity of the liquid cooling plate.

[0018] In addition, the arrayed or uniformly arranged second liquid cooling circuits can better regulate the temperature distribution inside the battery module and significantly reduce the temperature gradient inside the battery module.

[0019] Secondly, this embodiment also provides a battery pack, which includes a battery module and the liquid cooling structure in the foregoing embodiment. The battery module is connected to the liquid cooling plate, and the liquid cooling plate is used for heat dissipation of the battery module.

[0020] In some embodiments, the battery pack further includes a BMS control center, and each solenoid valve disposed in the second liquid cooling circuit is connected to the BMS control center, which is used to control the on / off state of the second liquid cooling circuit.

[0021] In this way, the BMS control center can monitor the temperature status of the battery module in real time, thereby dynamically controlling the on / off state of each second liquid cooling circuit. When the temperature of a certain area of ​​the battery module is too high, the BMS can immediately open the corresponding second liquid cooling circuit for heat dissipation; when the temperature returns to normal, the circuit is closed. Therefore, it can achieve fine-tuning of the local temperature of the battery pack, avoid local overheating of the battery pack, and thus achieve efficient temperature management.

[0022] In this way, the BMS control center can detect abnormal temperatures in the battery module in a timely manner and take measures to dissipate heat quickly, thereby effectively preventing battery failures caused by local overheating.

[0023] In some embodiments, the liquid cooling structure further includes a plurality of sensors for detecting the temperature of different regions of the battery module.

[0024] In this way, by arranging multiple sensors in different areas of the battery module, temperature data of each area of ​​the battery module can be collected in real time and accurately, and temperature fluctuations of the battery module under different operating conditions can be captured in a timely manner and fed back to the BMS control center in real time. The BMS control center can dynamically adjust the on / off state of each second liquid cooling circuit, thereby ensuring that the temperature of each area of ​​the battery module is always kept within the optimal operating range, avoiding battery performance degradation due to excessively high or low temperatures.

[0025] In this way, integrating the sensors with the liquid cooling structure and BMS control center makes the entire battery pack management system more compact and efficient.

[0026] In some embodiments, each sensor is disposed opposite to a second liquid cooling circuit along the thickness direction of the liquid cooling plate; and / or,

[0027] Along the thickness direction of the liquid cooling plate, each of the second liquid cooling circuits is arranged opposite to one of the sensors.

[0028] By positioning the sensor relative to the second liquid cooling circuit, precise temperature monitoring of the area covered by each liquid cooling circuit is achieved, ensuring more accurate temperature data for each liquid cooling circuit and avoiding measurement errors caused by excessive distance between the sensor and the liquid cooling circuit.

[0029] In this way, each second liquid cooling circuit can independently perform heat dissipation operation according to the actual temperature of its corresponding area, thus effectively reducing the accumulation of heat in local areas and improving heat dissipation efficiency.

[0030] In addition, the relative arrangement of the sensor and the second liquid cooling circuit reduces the thermal resistance in the heat conduction path. The sensor can directly monitor the temperature of the area covered by the liquid cooling circuit, and the BMS control center can respond quickly and achieve local heat dissipation by controlling the second liquid cooling circuit, thereby improving the efficiency of the entire heat dissipation system.

[0031] In some embodiments, the battery pack further includes a liquid cooler connected to the first liquid cooling circuit and the second liquid cooling circuit; thus, using a single liquid cooler to connect the first liquid cooling circuit and the second liquid cooling circuit can significantly simplify the structure of the liquid cooling system, reduce the complexity of the liquid cooling structure, reduce the system failure rate, and also reduce costs.

[0032] It is understood that in this embodiment, the liquid chiller is connected to the first liquid-cooled cavity through a liquid-cooled pipe, and the liquid chiller is connected to the second liquid-cooled cavity through another liquid-cooled pipe.

[0033] Alternatively, the battery pack may further include a first liquid cooler and a second liquid cooler, wherein the first liquid cooler is connected to the first liquid cooling cavity and the second liquid cooler is connected to the second liquid cooling cavity.

[0034] In this way, the coolant flow and temperature of the first and second liquid cooling cavities can be independently controlled, achieving more precise temperature management. The first liquid cooler can achieve overall temperature regulation of the battery module, while the second liquid cooler can optimize heat dissipation in local high-temperature areas on the battery module, further reducing the temperature gradient inside the battery pack and improving temperature consistency.

[0035] Therefore, by independently controlling the first and second liquid coolers, the flow rate and temperature of the coolant can be flexibly adjusted according to the actual heat generation and heat dissipation requirements of different areas of the battery pack, which not only improves heat dissipation efficiency but also reduces coolant waste.

[0036] It should also be noted that even if one of the liquid chillers fails, the other liquid chiller can continue to work, ensuring the normal operation of the liquid cooling system and preventing the entire liquid cooling structure from failing due to the failure of one liquid chiller, thus improving the reliability and safety of the system.

[0037] It is understood that in this embodiment, the first liquid chiller is connected to the first liquid-cooled cavity through a liquid-cooled pipe, and the second liquid chiller is connected to the second liquid-cooled cavity through another liquid-cooled pipe.

[0038] Thirdly, the present invention also provides an electrical device, which includes the battery pack as described in the foregoing embodiments.

[0039] The beneficial effects of the embodiments of this utility model are as follows:

[0040] In an embodiment of this utility model, a first liquid cooling cavity and a second liquid cooling cavity are provided in the liquid cooling plate, thereby forming a first liquid cooling circuit and multiple second liquid cooling circuits respectively. The first liquid cooling circuit can macroscopically regulate the overall temperature of the battery pack, ensuring that the overall temperature of the battery pack is maintained within a reasonable range when operating at high power. The second liquid cooling circuit can regulate the local temperature of the battery pack, effectively reducing the local temperature heat accumulation, thereby achieving coordinated heat dissipation of the whole and the local.

[0041] Furthermore, at least one second liquid cooling circuit has an independent control function. When the local temperature inside the battery pack is too high, the corresponding second liquid cooling circuit can be opened, so that the second liquid cooling circuit can regulate the local temperature of the battery pack. In addition, the second liquid cooling circuit can also flexibly adjust the liquid cooling flow rate and temperature according to the actual heat generation and heat dissipation of different areas inside the battery pack. This can significantly reduce the temperature difference inside the battery pack and improve the problem of uneven temperature distribution caused by the uniform distribution of flow channels in traditional liquid cooling plates, thereby improving the overall temperature consistency of the battery pack.

[0042] In summary, the dual liquid cooling channel design can precisely regulate the local high temperature in the middle of the battery pack module, reduce the overall temperature difference of the battery pack, and improve the consistency, performance and lifespan of the battery pack. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the liquid cooling structure provided in an embodiment of the present invention;

[0045] Figure 2 This is a perspective view of the liquid cooling structure provided in an embodiment of this utility model;

[0046] Figure 3 yes Figure 1 A cross-sectional view of AA in the liquid-cooled structure shown;

[0047] Figure 4 yes Figure 1 A cross-sectional view of BB in the liquid-cooled structure shown;

[0048] Figure 5 yes Figure 2 A cross-sectional view of CC in the liquid cooling structure shown;

[0049] Figure 6 This is a schematic diagram of the battery pack provided in an embodiment of the present invention.

[0050] The image is labeled as follows:

[0051] 1. Liquid cooling structure;

[0052] 11. Liquid cooling plate; 111. First liquid cooling cavity; 1111. First liquid cooling circuit; 112. Second liquid cooling cavity; 1121. Second liquid cooling circuit;

[0053] 12. Battery module;

[0054] 13. Solenoid valve;

[0055] 2. Battery pack;

[0056] 21. BMS Control Center;

[0057] 22. First liquid chiller;

[0058] 23. Second liquid chiller. Detailed Implementation

[0059] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0060] Reference Figures 1 to 4 As shown, this utility model provides a liquid cooling structure 1, which includes a liquid cooling plate 11. Along the thickness direction of the liquid cooling plate 11, the liquid cooling plate 11 is provided with a first liquid cooling cavity 111 and a second liquid cooling cavity 112 arranged sequentially and at intervals. The first liquid cooling cavity 111 forms a first liquid cooling circuit 1111, and the second liquid cooling cavity 112 forms a plurality of second liquid cooling circuits 1121. At least one second liquid cooling circuit 1121 can be independently controlled.

[0061] In an embodiment of this utility model, a first liquid cooling cavity 111 and a second liquid cooling cavity 112 are provided in the liquid cooling plate 11, thereby forming a first liquid cooling circuit 1111 and a plurality of second liquid cooling circuits 1121 respectively. The first liquid cooling circuit 1111 can macroscopically regulate the overall temperature of the battery pack 2, ensuring that the overall temperature of the battery pack 2 is maintained within a reasonable range when operating at high power. The second liquid cooling circuits 1121 can regulate the local temperature of the battery pack 2, effectively reducing the local temperature heat accumulation, thereby achieving overall and local coordinated heat dissipation.

[0062] Furthermore, at least one second liquid cooling circuit 1121 has an independent control function. When the local temperature inside the battery pack 2 is too high, the corresponding second liquid cooling circuit 1121 can be opened, so that the second liquid cooling circuit 1121 can regulate the local temperature of the battery pack 2. In addition, the second liquid cooling circuit 1121 can also flexibly adjust the liquid cooling flow rate and temperature according to the actual heat generation and heat dissipation of different areas inside the battery pack 2, which can significantly reduce the temperature difference inside the battery pack 2, improve the problem of uneven temperature distribution caused by the uniform distribution of the flow channels in the traditional liquid cooling plate 11, and thus improve the overall temperature consistency of the battery pack 2.

[0063] In summary, the dual liquid cooling channel design can precisely regulate the local high temperature in the middle of the battery pack 2 module, reduce the overall temperature difference of the battery pack 2, and improve the consistency, performance and lifespan of the battery pack 2.

[0064] In this embodiment, at least one second liquid cooling circuit 1121 can independently control the on / off state of the area, the liquid cooling flow rate of the area, or the liquid cooling temperature of the area. In actual use, other parameters can also be adjusted according to actual usage needs.

[0065] Understandable Figure 2 The internal structural lines of the first liquid-cooled cavity 111 and the second liquid-cooled cavity 112 are shown by dashed lines.

[0066] It should also be noted that, in order to avoid interference between the first liquid cooling circuit 1111 and the multiple second liquid cooling circuits 1121, the first liquid cooling circuit 1111 and the multiple second liquid cooling circuits 1121 are not connected to each other.

[0067] In some embodiments, refer to Figure 2 As shown, the liquid cooling plate 11 is used to support the battery module 12, and a plurality of second liquid cooling circuits 1121 are disposed on the side of the first liquid cooling circuit 1111 away from the battery module 12.

[0068] Thus, by placing the second liquid cooling circuit 1121 on the side of the first liquid cooling circuit 1111 away from the battery module 12, the heat dissipation path of the liquid cooling plate 11 becomes more reasonable. The first liquid cooling circuit 1111 directly contacts the battery module 12, enabling it to quickly absorb the heat generated by the battery module 12; while the second liquid cooling circuit 1121 is on the back of the first liquid cooling circuit 1111, forming an auxiliary heat dissipation layer, allowing heat to be absorbed and dissipated in stages, avoiding excessive heat accumulation inside the liquid cooling plate 11, thereby improving the overall heat dissipation efficiency.

[0069] Furthermore, the second liquid cooling circuit 1121 can be independently controlled, and the liquid cooling flow rate and temperature of the second liquid cooling circuit 1121 can be flexibly adjusted according to the actual heat generation and heat dissipation requirements of different areas of the battery module 12.

[0070] In some embodiments, the liquid cooling structure 1 further includes a plurality of solenoid valves 13, and each second liquid cooling circuit 1121 is connected to a solenoid valve 13, which is used to control the on / off state of the corresponding second liquid cooling circuit 1121.

[0071] Thus, each second liquid cooling circuit 1121 is equipped with a solenoid valve 13, which can independently control the on / off state of the second liquid cooling circuit 1121 and flexibly adjust the working state of each second liquid cooling circuit 1121 according to the actual heat generation and heat dissipation requirements of different areas of the battery module 12.

[0072] This also avoids unnecessary cooling of areas with low heat generation, thereby optimizing the efficiency of coolant use and reducing energy waste.

[0073] In some embodiments, refer to Figure 2 and Figure 5 As shown, the first liquid cooling circuit 1111 and the second liquid cooling circuit 1121 are at least partially staggered.

[0074] When the first liquid cooling circuit 1111 and the second liquid cooling circuit 1121 are partially staggered, the heat distribution in the liquid cooling plate 11 is more uniform, which can avoid the phenomenon that heat is excessively concentrated in some areas and insufficient heat dissipation in other areas due to the complete overlap of the first liquid cooling circuit 1111 and the second liquid cooling circuit 1121.

[0075] In this way, the staggered arrangement allows the heat inside the liquid cooling plate 11 to be absorbed and dissipated in stages. The first liquid cooling circuit 1111 directly contacts the battery module 12 and absorbs heat. After absorbing heat, the second liquid cooling circuit 1121 further absorbs heat at the adjacent position, forming a multi-layer heat dissipation effect and improving the overall heat dissipation efficiency.

[0076] In addition, by staggering the settings, the thermal resistance between the first liquid cooling circuit 1111 and the second liquid cooling circuit 1121 is effectively reduced, and heat can be conducted from the battery module 12 to the first liquid cooling circuit 1111 or the second liquid cooling circuit 1121 more quickly, thereby improving heat dissipation efficiency, significantly reducing the temperature gradient inside the battery module 12, and ensuring that the temperature of each area of ​​the battery module 12 is more consistent.

[0077] In some embodiments, the plurality of second liquid cooling circuits 1121 are arranged in an array or uniformly.

[0078] This ensures a more uniform heat distribution within the liquid cooling plate 11, allowing each second liquid cooling cavity 112 to effectively absorb and dissipate heat, preventing excessive heat concentration in local areas, and thus improving the heat dissipation uniformity of the entire liquid cooling plate 11.

[0079] In addition, the array-arranged or uniformly distributed second liquid cooling circuits 1121 can better regulate the temperature distribution inside the battery module 12 and significantly reduce the temperature gradient inside the battery module 12.

[0080] Secondly, referring to Figure 6 As shown, this embodiment also provides a battery pack 2, which includes a battery module 12 and the liquid cooling structure 1 in the aforementioned embodiment. The battery module 12 is connected to a liquid cooling plate 11, and the liquid cooling plate 11 is used for heat dissipation of the battery module 12.

[0081] The battery pack 2 has all the beneficial effects of the aforementioned liquid cooling structure 1, which will not be repeated here.

[0082] In some embodiments, the battery pack 2 further includes a BMS control center 21, and each solenoid valve 13 disposed in the second liquid cooling circuit 1121 is connected to the BMS control center 21. The BMS control center 21 is used to control the on / off state of the second liquid cooling circuit 1121.

[0083] In this way, the BMS control center 21 can monitor the temperature status of the battery module 12 in real time, thereby dynamically controlling the on / off state of each second liquid cooling circuit 1121. When the temperature of a certain area of ​​the battery module 12 is too high, the BMS can immediately open the corresponding second liquid cooling circuit 1121 for heat dissipation; when the temperature returns to normal, the circuit is closed. Therefore, it is possible to fine-tune the local temperature of the battery pack 2, avoid local overheating of the battery pack 2, and thus achieve efficient temperature management.

[0084] In this way, the BMS control center 21 can detect abnormal temperatures in the battery module 12 in a timely manner and take measures to dissipate heat quickly, thereby effectively preventing battery failures caused by local overheating.

[0085] In some embodiments, the liquid cooling structure 1 further includes multiple sensors for detecting the temperature of different regions of the battery module 12.

[0086] In this way, by arranging multiple sensors in different areas of the battery module 12, the temperature data of each area of ​​the battery module 12 can be collected in real time and accurately, the temperature fluctuations of the battery module 12 under different operating conditions can be captured in a timely manner, and the data can be fed back to the BMS control center 21 in real time. The BMS control center 21 can dynamically adjust the on / off state of each second liquid cooling circuit 1121, thereby ensuring that the temperature of each area of ​​the battery module 12 is always kept within the optimal operating range, and avoiding the degradation of battery performance due to excessively high or low temperatures.

[0087] In this way, integrating the sensor with the liquid cooling structure 1 and the BMS control center 21 makes the entire battery pack 2 management system more compact and efficient.

[0088] In some embodiments, along the thickness direction of the liquid cooling plate 11, each sensor is disposed opposite to a second liquid cooling circuit 1121; and / or,

[0089] Along the thickness direction of the liquid cooling plate 11, each second liquid cooling circuit 1121 is positioned opposite to a sensor.

[0090] By positioning the sensor relative to the second liquid cooling circuit 1121, precise temperature monitoring of the area covered by each liquid cooling circuit is achieved, ensuring more accurate temperature data for each liquid cooling circuit and avoiding measurement errors caused by excessive distance between the sensor and the liquid cooling circuit.

[0091] In this way, each second liquid cooling circuit 1121 can independently perform heat dissipation operation according to the actual temperature of its corresponding area, thus effectively reducing the accumulation of heat in local areas and improving heat dissipation efficiency.

[0092] In addition, the relative arrangement of the sensor and the second liquid cooling circuit 1121 reduces the thermal resistance in the heat conduction path. The sensor can directly monitor the temperature of the area covered by the liquid cooling circuit. The BMS control center 21 can respond quickly and achieve local heat dissipation by controlling the second liquid cooling circuit 1121, thereby improving the efficiency of the entire heat dissipation system.

[0093] In some embodiments, the battery pack 2 further includes a liquid cooler connected to the first liquid cooling circuit 1111 and the second liquid cooling circuit 1121. Thus, using a single liquid cooler to connect the first liquid cooling circuit 1111 and the second liquid cooling circuit 1121 can significantly simplify the structure of the liquid cooling system, reduce the complexity of the liquid cooling structure 1, reduce the system failure rate, and also reduce costs.

[0094] It is understood that in this embodiment, the liquid chiller is connected to the first liquid-cooled cavity 111 through a liquid-cooled pipe, and the liquid chiller is connected to the second liquid-cooled cavity 112 through another liquid-cooled pipe.

[0095] Alternatively, the battery pack 2 may also include a first liquid cooler 22 and a second liquid cooler 23, with the first liquid cooler 22 connected to the first liquid cooling cavity 111 and the second liquid cooler 23 connected to the second liquid cooling cavity 112.

[0096] In this way, the flow rate and temperature of the coolant in the first liquid cooling cavity 111 and the second liquid cooling cavity 112 can be controlled independently, achieving more precise temperature management. The first liquid cooler 22 can achieve overall temperature regulation of the battery module 12, while the second liquid cooler 23 can optimize heat dissipation in local high-temperature areas on the battery module 12, further reducing the temperature gradient inside the battery pack 2 and improving temperature consistency.

[0097] Therefore, by independently controlling the first liquid cooler 22 and the second liquid cooler 23, the flow rate and temperature of the coolant can be flexibly adjusted according to the actual heat generation and heat dissipation requirements of different areas of the battery pack 2, which not only improves heat dissipation efficiency but also reduces coolant waste.

[0098] It should also be noted that even if one of the liquid chillers fails, the other liquid chiller can continue to work, ensuring the normal operation of the liquid cooling system and preventing the entire liquid cooling structure from failing due to the failure of one liquid chiller, thus improving the reliability and safety of the system.

[0099] It is understood that in this embodiment, the first liquid cooler 22 is connected to the first liquid cooling cavity 111 through a liquid cooling pipe, and the second liquid cooler 23 is connected to the second liquid cooling cavity 112 through another liquid cooling pipe.

[0100] Thirdly, this utility model also provides an electrical device, which includes the battery pack 2 as described in the foregoing embodiments.

[0101] This electrical device has all the beneficial effects of the aforementioned battery pack 2, which will not be repeated here.

[0102] It should be noted that in this application, "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the related objects before and after it are in an "or" relationship.

[0103] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A liquid-cooled structure, characterized in that, include: The liquid cooling plate (11) has a first liquid cooling cavity (111) and a second liquid cooling cavity (112) arranged sequentially and at intervals along the thickness direction of the liquid cooling plate (11). The first liquid cooling cavity (111) forms a first liquid cooling circuit (1111), and the second liquid cooling cavity (112) forms a plurality of second liquid cooling circuits (1121). At least one second liquid cooling circuit (1121) can be independently controlled.

2. The liquid cooling structure according to claim 1, characterized in that, The liquid cooling plate (11) is used to support the battery module (12), and a plurality of second liquid cooling circuits (1121) are disposed on the side of the first liquid cooling circuit (1111) away from the battery module (12).

3. The liquid-cooled structure according to claim 1 or 2, characterized in that, The liquid cooling structure (1) also includes a plurality of solenoid valves (13), and each of the second liquid cooling circuits (1121) is connected to a solenoid valve (13). The solenoid valve (13) is used to control the on / off state of the corresponding second liquid cooling circuit (1121).

4. The liquid-cooled structure according to claim 1, characterized in that, The first liquid cooling circuit (1111) and the second liquid cooling circuit (1121) are at least partially staggered.

5. The liquid cooling structure according to claim 1, characterized in that, Multiple second liquid cooling circuits (1121) are arranged in an array or uniformly.

6. A battery pack, characterized in that, It includes a battery module (12) and a liquid cooling structure (1) as described in any one of claims 1-5, wherein the battery module (12) is connected to the liquid cooling plate (11), and the liquid cooling plate (11) is used for heat dissipation of the battery module (12).

7. The battery pack according to claim 6, characterized in that, The battery pack (2) also includes a BMS control center (21), and each solenoid valve disposed in the second liquid cooling circuit (1121) is connected to the BMS control center (21). The BMS control center (21) is used to control the on / off state of the second liquid cooling circuit (1121).

8. The battery pack according to claim 7, characterized in that, The liquid cooling structure (1) also includes multiple sensors for detecting the temperature of different areas of the battery module (12).

9. The battery pack according to claim 8, characterized in that, Along the thickness direction of the liquid cooling plate (11), each of the sensors is disposed opposite to a second liquid cooling circuit (1121); and / or, Along the thickness direction of the liquid cooling plate (11), each of the second liquid cooling circuits (1121) is disposed opposite to one of the sensors.

10. The battery pack according to claim 8, characterized in that, The battery pack (2) further includes a liquid cooler connected to the first liquid cooling circuit (1111) and the second liquid cooling circuit (1121); or, The battery pack (2) further includes a first liquid cooler (22) and a second liquid cooler (23), the first liquid cooler (22) being connected to the first liquid cooling cavity (111) and the second liquid cooler (23) being connected to the second liquid cooling cavity (112).

11. An electrical appliance, characterized in that, Includes the battery pack (2) as described in any one of claims 6-10.

Images