Battery cluster liquid cooling unit

Abstract

The utility model discloses a battery cluster liquid cooling unit which comprises a heat exchanger and a pipeline system, and the heat exchanger is used for heat exchange of cooling liquid flowing through the heat exchanger; the pipeline system comprises a first connecting pipe and a second connecting pipe, the heat exchanger is provided with a first connecting port and a second connecting port, the first connecting pipe is connected with the first connecting port, the second connecting pipe is connected with the second connecting port through a main pipeline and a bypass pipeline which are arranged in parallel, and the main pipeline and the bypass pipeline are each provided with a pump body and a first valve. According to the battery cluster liquid cooling unit, the second connecting pipe is connected with the second connecting port through the main pipeline and the bypass pipeline which are arranged in parallel, the situation that one pump body breaks down and the other pump body is switched to continue working is allowed, the downtime of the liquid cooling unit is shortened, and the reliability, the stability and the maintenance convenience of the liquid cooling unit are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling technology, and in particular to a liquid cooling unit for battery clusters. Background Technology

[0002] With the continuous advancement of the lithium-ion battery industry, lithium battery energy storage technologies are emerging rapidly, and industry valuations are constantly rising. Thermal management systems, as crucial for ensuring the safe and stable operation of lithium battery systems, are attracting increasing attention from industry professionals. Thermal management technology is also evolving from early air-cooling solutions to liquid-cooling systems with higher heat dissipation efficiency and better temperature uniformity. A liquid-cooled unit integrates a refrigeration circuit, a coolant circuit, and a fan. The refrigeration circuit cools the coolant circuit through a plate heat exchanger, while the fan dissipates heat from the condenser in the refrigeration circuit. The liquid-cooled unit is the core component of the entire liquid-cooling system.

[0003] Currently, the coolant circuit of liquid cooling units is usually driven by a single pump. There is a risk that the pump will stop working, causing the coolant to stop flowing. This can lead to a sharp rise in the temperature of the lithium battery, or even overheating or thermal runaway, affecting the performance and safety of the lithium battery system. Utility Model Content

[0004] The purpose of this utility model is to provide a battery cluster liquid cooling unit with a simple structure, stable coolant flow, and high reliability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery cluster liquid cooling unit is provided, including a heat dissipation component and a piping system. The heat dissipation component includes a heat exchanger for heat exchange of coolant flowing through it. The piping system includes a first connecting pipe and a second connecting pipe. The heat exchanger has a first connection port and a second connection port. The first connecting pipe is connected to the first connection port. The second connecting pipe is connected to the second connection port through a main pipeline and a bypass pipeline arranged in parallel. A pump body and a first valve are provided on both the main pipeline and the bypass pipeline.

[0007] As a preferred embodiment of the battery cluster liquid cooling unit, the piping system further includes a third connecting pipe. The end of the main pipeline and the bypass pipeline away from the second connecting pipe is connected to the third connecting pipe. The end of the third connecting pipe away from the main pipeline and the bypass pipeline is connected to the second connecting port. The second connecting port is a liquid outlet, and the first connecting port is a liquid inlet.

[0008] As a preferred embodiment of the battery cluster liquid cooling unit, the piping system further includes an expansion tank, which is connected to the third connecting pipe.

[0009] As a preferred embodiment of the battery cluster liquid cooling unit, the piping system further includes a check valve, which is installed on both the main pipeline and the bypass pipeline, and the check valve is located on the side of the pump body near the second connecting pipe.

[0010] As a preferred embodiment of the battery cluster liquid cooling unit, the piping system further includes a flow meter and a replenishment pipe. The flow meter is installed on the third connecting pipe, one end of the replenishment pipe is connected to the third connecting pipe, a second valve is installed on the replenishment pipe, and the end of the replenishment pipe away from the third connecting pipe is connected to an external water tank.

[0011] As a preferred embodiment of the battery cluster liquid cooling unit, the piping system further includes a filter, which is detachably mounted on the first connecting pipe; and / or,

[0012] The filter is detachably installed on the third connecting pipe.

[0013] As a preferred embodiment of the battery cluster liquid cooling unit, the piping system further includes a liquid supply pressure sensor, which is disposed on the second connecting pipe; and / or,

[0014] The piping system further includes a temperature sensor, which is disposed on the second connecting pipe; and / or,

[0015] The piping system further includes a vacuum pipe connected to the second connecting pipe, and a fourth valve is provided on the vacuum pipe; and / or,

[0016] The piping system further includes an automatic air vent valve, which is disposed on the second connecting pipe; and / or,

[0017] The heat dissipation assembly also includes a fan, which is mounted on the heat exchanger and is used to dissipate the heat generated by the heat exchanger.

[0018] As a preferred embodiment of the battery cluster liquid cooling unit, the battery cluster liquid cooling unit further includes a chassis, the chassis including a detachably connected body and a cover, the body having an accommodating slot, the heat dissipation components and the piping system being disposed within the accommodating slot, and the cover being used to seal the opening of the accommodating slot.

[0019] As a preferred embodiment of the battery cluster liquid cooling unit, the cover includes a cover body and a flip cover. The cover body is used to seal the opening of the receiving slot. The cover body is provided with a maintenance port. The flip cover is rotatably connected to the cover body and is used to close or open the maintenance port. The piping system is located below the maintenance port.

[0020] As a preferred embodiment of the battery cluster liquid cooling unit, the chassis further includes a filter, and at least one side of the chassis is provided with an air inlet, to which a filter is detachably connected; and / or,

[0021] The box cover is provided with an air outlet that communicates with the receiving slot, and a filter screen is detachably connected to the air outlet.

[0022] As a preferred embodiment of the battery cluster liquid cooling unit, the bottom of the receiving tank is also provided with a liquid leakage port.

[0023] The beneficial effects of this utility model are as follows: By connecting the second connecting pipe to the second connection port using the parallel main pipeline and bypass pipeline, the stability of the coolant flow driven by the second connecting pipe to the second connection port can be enhanced, reducing the risk of liquid cooling unit downtime due to single pump failure. It allows for switching to another pump to continue operation when one pump fails, reducing the downtime of the liquid cooling unit and effectively improving the reliability, stability, and maintenance convenience of the cooling unit, thereby ensuring the performance and safety of the battery cluster. By setting up two pipelines in parallel, the main pipeline and bypass pipeline, combined with the operation of two pumps, energy efficiency can be optimized. Simultaneous operation can share the load, reducing the pressure of long-term high-load operation of a single pump, effectively extending the service life of the equipment. Moreover, the operating strategy of the pumps can be adjusted according to the load. One pump can be shut down at low load to save energy, while both pumps work together at high load to ensure the optimal liquid cooling performance of the liquid cooling unit. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic flow diagram of the battery cluster liquid cooling unit according to an embodiment of the present invention;

[0026] Figure 2 This is an exploded view of the battery cluster liquid cooling unit according to an embodiment of the present invention. Figure 1 ;

[0027] Figure 3 This is a schematic diagram of the structure of the battery cluster liquid cooling unit according to an embodiment of the present invention;

[0028] Figure 4 This is an exploded view of the battery cluster liquid cooling unit according to an embodiment of the present invention. Figure 2 .

[0029] In the picture:

[0030] 1. Heat dissipation assembly; 11. Heat exchanger; 111. First connection port; 112. Second connection port; 12. Fan;

[0031] 2. Piping system; 21. First connecting pipe; 22. Second connecting pipe; 23. Main pipeline; 24. Bypass pipeline; 25. Pump body; 26. First valve; 27. Third connecting pipe; 28. Expansion tank; 29. ​​Check valve; 30. Flow meter; 31. Replenishment pipe; 32. Second valve; 33. Filter; 34. Third valve; 35. Supply pressure sensor; 36. Temperature sensor; 37. Vacuum pipe; 38. Fourth valve; 39. Automatic exhaust valve;

[0032] 4. Chassis; 41. Cabinet; 411. Receiving slot; 412. Air inlet; 42. Cover; 421. Cover; 4211. Maintenance port; 422. Flip cover; 423. Air outlet; 43. Filter; 44. Third connection port; 45. Fourth connection port. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] like Figure 1 As shown, the battery cluster liquid cooling unit of this utility model embodiment includes a heat dissipation component 1 and a piping system 2. The heat dissipation component 1 includes a heat exchanger 11, which is used to exchange heat with the coolant flowing through it. The piping system 2 includes a first connecting pipe 21 and a second connecting pipe 22. The heat exchanger 11 has a first connecting port 111 and a second connecting port 112. The first connecting pipe 21 is connected to the first connecting port 111. The second connecting pipe 22 is connected to the second connecting port 112 through a main pipeline 23 and a bypass pipeline 24 arranged in parallel. A pump body 25 and a first valve 26 are provided on both the main pipeline 23 and the bypass pipeline 24.

[0038] It is understandable that by connecting the second connecting pipe 22 to the second connecting port 112 via the parallel main pipe 23 and bypass pipe 24, the stability of the coolant flow driven by the second connecting pipe 22 to the second connecting port 112 can be enhanced, reducing the risk of liquid cooling unit downtime due to the failure of a single pump 25. It allows the other pump 25 to continue operating when one pump 25 fails, reducing the downtime of the liquid cooling unit and effectively improving the reliability, stability, and maintenance convenience of the cooling unit, thereby ensuring the performance and safety of the battery cluster. By setting the two pipes 23 and bypass pipe 24 in parallel and combining the operation of two pumps 25, energy efficiency can also be optimized. Simultaneous operation can share the load, reducing the pressure of long-term high-load operation of a single pump 25, effectively extending the service life of the equipment. Moreover, the operating strategy of the pumps 25 can be adjusted according to the load. One pump 25 can be shut down at low load to save energy, while both pumps work together at high load to ensure the optimal liquid cooling performance of the liquid cooling unit.

[0039] Furthermore, such as Figure 1 and Figure 3As shown, the piping system 2 also includes a third connecting pipe 27. The ends of the main pipe 23 and the bypass pipe 24 away from the second connecting pipe 22 are respectively connected to the third connecting pipe 27. The end of the third connecting pipe 27 away from the main pipe 23 and the bypass pipe 24 is connected to the second connecting port 112. The second connecting port 112 is the liquid outlet, and the first connecting port 111 is the liquid inlet. The heat exchanger 11 is used to heat exchange the coolant introduced through the liquid inlet and to discharge it to the third connecting pipe 27 through the liquid outlet. That is, the main pipe 23 and the bypass pipe 24 and the pump body 25 on their structure are set at the liquid outlet end of the heat exchanger 11. This reduces the impact of high temperature coolant on the pump body 25, such as structural stress changes or expansion, accelerated aging of the sealing ring, and decrease in lubricating oil viscosity, which affect the service life of the pump body 25 and help extend the service life of the pump body 25.

[0040] Furthermore, the piping system 2 also includes an expansion tank 28, which is connected to the third connecting pipe 27. The expansion tank 28 can absorb and mitigate the volume expansion caused by changes in coolant temperature, that is, it can balance the pressure difference caused by changes in coolant pressure in the pipeline, prevent excessive pressure in the pipeline from causing damage to the pipeline, valves or pump body 25, and extend the service life of the liquid cooling unit.

[0041] Preferably, the piping system 2 further includes a check valve 29. Check valves 29 are installed on both the main pipeline 23 and the bypass pipeline 24, and are located on the side of the pump body 25 closest to the second connecting pipe 22. The check valve 29 ensures unidirectional flow of the coolant, prevents the parallel pipelines from forming an internal loop, and prevents backflow of coolant that could damage the pump body 25, thus improving the operational safety and stability of the liquid-cooled unit.

[0042] Optionally, the heat dissipation assembly 1 also includes a fan 12, which is disposed on the heat exchanger 11. The fan 12 is used to dissipate the heat generated by the heat exchanger 11. By disposing of the fan 12, the heat dissipation efficiency of the heat exchanger 11 can be effectively improved.

[0043] It should be noted that the battery cluster liquid cooling unit connects to the battery module. Coolant at a certain temperature flows from the liquid cooling plate inside the battery module through the first connecting pipe 21 to the heat exchanger 11 for heat exchange. After the heat exchange and cooling process, the coolant is guided through the third connecting pipe 27 and the first connecting pipe 21 back to the liquid cooling plate for further heat exchange with the battery module, and this process is repeated. This liquid cooling unit consists only of a heat dissipation component 1 and a piping system 2, resulting in a simple and compact structure, low production cost, and the ability to be used for battery clusters of a single battery module.

[0044] In some embodiments, such as Figure 1 and Figure 3As shown, the piping system 2 also includes a flow meter 30 and a replenishment pipe 31. The flow meter 30 is installed on the third connecting pipe 27. One end of the replenishment pipe 31 is connected to the third connecting pipe 27, and a second valve 32 is installed on the replenishment pipe 31. The end of the replenishment pipe 31 away from the third connecting pipe 27 is connected to an external water tank. Since the coolant temperature is high after heat exchange in the battery module, it is prone to gas generation due to high temperature, meaning coolant consumption occurs. Therefore, by using the flow meter 30 to detect the coolant flow rate in the pipe, feedback is sent to the control center to regulate the opening of the second valve 32. The coolant from the external water tank is then replenished to the liquid cooling circuit through the replenishment pipe 31, thus ensuring sufficient coolant in the liquid cooling unit and guaranteeing the stability of the liquid cooling unit's operation. Furthermore, in addition to being connected to the third connecting pipe 27, the replenishment pipe 31 can also be connected to the first connecting pipe 21 or the second connecting pipe 22; similarly, the flow meter 30 can be installed on the third connecting pipe 27, or on the first connecting pipe 21 or the second connecting pipe 22.

[0045] Optionally, the piping system 2 also includes a filter 33, which is detachably mounted on the first connecting pipe 21. By mounting the filter 33 on the first connecting pipe 21, impurities in the coolant entering the heat exchanger are effectively filtered, reducing the impact of impurities on the heat exchanger, extending the service life of the heat exchanger, and ensuring the cleanliness of the coolant, thereby ensuring the flow and heat exchange performance of the coolant. Furthermore, by mounting the filter 33 on the third connecting pipe 27, the impact of impurities in the coolant on the pump body 25 can be reduced, extending the service life of the pump body 25. For example, the filter 33 may include a filter pipe and filter cotton inside the filter pipe. The filter pipe is detachably connected to a section of the connecting pipe via clamps, so that the coolant flowing through the filter pipe can be filtered by the filter cotton, achieving the filtration function. Further examples are not provided here.

[0046] Furthermore, the piping system 2 also includes third valves 34. A third valve 34 is installed on the first connecting pipe 21 to regulate the flow rate of coolant within the first connecting pipe 21; a third valve 34 is installed on the second connecting pipe 22 to regulate the flow rate within the second connecting pipe 22; and a third valve 34 is installed on the third connecting pipe 27 to regulate the flow rate within the third connecting pipe 27. By installing third valves 34 on each pipe, the flow rate of coolant in each pipe can be independently controlled. Furthermore, if other structures on a local pipe are damaged, the corresponding valve can be closed to achieve isolation, allowing for localized repairs or inspections, thus improving the maintenance convenience of the liquid-cooled unit.

[0047] Preferably, the piping system 2 further includes a liquid supply pressure sensor 35, which is mounted on the second connecting pipe 22. The liquid supply pressure sensor 35 can monitor the changes in coolant pressure in the pipeline in real time, preventing situations where excessive pressure may lead to pipeline rupture or equipment damage, or excessively low pressure may cause the system to malfunction. Furthermore, it can collect data for later recording and analysis, facilitating understanding of the system's operating status and enabling the development of regular maintenance and performance optimization plans to ensure the safe, stable, and efficient operation of the liquid cooling unit.

[0048] In addition, the piping system 2 also includes a temperature sensor 36, which is installed on the second connecting pipe 22 to monitor the temperature of the coolant flowing into the battery module of the battery cluster through the second connecting pipe 22, so as to provide feedback and adjust the cooling effect of the heat exchanger 11.

[0049] Of course, the piping system 2 also includes a vacuum pipe 37, which is connected to the second connecting pipe 22, and a fourth valve 38 is installed on the vacuum pipe 37. Before the liquid cooling unit, the fourth valve 38 is opened and the vacuum pipe 37 is used to act on the second connecting pipe 22 to extract the gas in the piping system, ensuring the cleanliness of the environment inside the piping system 2.

[0050] Optionally, the piping system 2 also includes an automatic vent valve 39, which is installed on the second connecting pipe 22. As the coolant heats up, it releases hydrogen, oxygen, and other gases. Therefore, the automatic vent valve 39 automatically discharges these gases from the pipe, ensuring the stability of the liquid flow within the pipe, reducing the risk of damage to structures such as the heat exchanger 11 and pump body 25 due to gas accumulation, and improving the operational stability of the liquid cooling unit.

[0051] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the battery cluster liquid cooling unit also includes a chassis 4, which includes a detachably connected housing 41 and a cover 42. The housing 41 has a receiving groove 411, in which the heat dissipation component 1 and the piping system 2 are disposed. The cover 42 is used to seal the opening of the receiving groove 411. By placing the heat dissipation component 1 and the piping system 2 inside the chassis 4, the protection of the battery cluster liquid cooling unit can be effectively improved, and the chassis 4 can be moved or installed to realize the installation of the entire battery cluster liquid cooling unit. The chassis 4 is detachably composed of the housing 41 and the cover 42. During use, the heat dissipation component 1 and the piping system 2 inside the housing 41 can be installed or maintained by removing the cover 42. For example, the top of the housing 41 is provided with multiple threaded holes, and the cover 42 is provided with through holes at positions opposite to the threaded holes. Bolts pass through the through holes and are screwed into the threaded holes to fix the cover 42 to the housing 41.

[0052] Furthermore, such as Figure 4 As shown, the cover 42 includes a cover body 421 and a flip cover 422. The cover body 422 is used to seal the opening of the receiving groove 411. A maintenance port 4211 is provided on the cover body 421. The flip cover 422 is rotatably connected to the cover body 421 and is used to close or open the maintenance port 4211. The piping system 2 is located below the maintenance port 4211. Since the components of the piping system 2 require frequent maintenance during use, the piping system 2 below the maintenance port 4211 can be maintained by rotating the flip cover 422 to open the maintenance port 4211, which is highly convenient.

[0053] Optionally, the flip cover 422 is also provided with a locking structure. For example, the locking structure is a latch that slides on the flip cover, and a snap-fit ​​groove is provided on the side wall of the maintenance opening 4211. The latch can engage with the snap-fit ​​groove to achieve selective locking between the flip cover 422 and the cover body 421, improving the safety of the flip cover 422. Of course, the locking structure can also be a rotational engagement or other selectively engaging locking structure.

[0054] In addition, to make the maintenance of the structure in the pipeline system 2, such as the automatic exhaust valve 39, vacuum tube 37, and various sensors, more convenient, the connection position of the automatic exhaust valve 39, vacuum tube 37, and various sensors to the connecting pipe is located at the top of the connecting pipe, and the length of the automatic exhaust valve 39, vacuum tube 37, and various sensors is extended vertically so that they can be disassembled and assembled along the maintenance port 4211.

[0055] It is understandable that the chassis 4 is provided with a third connection port 44 connected to the end of the first connecting pipe 21 away from the heat exchanger 11, and a fourth connection port 45 connected to the end of the second connecting pipe 22 away from the heat exchanger 11. The outlet of the liquid cooling plate of the battery module in the battery cluster is connected to the third connection port 44, and the inlet of the liquid cooling plate is connected to the fourth connection port 45.

[0056] Furthermore, such as Figure 2 and Figure 4 As shown, the chassis 4 also includes a filter 43. At least one side of the chassis 41 has an air inlet 412, and the filter 43 is detachably connected to the air inlet 412. Furthermore, along the air outlet direction of the fan 12, the cover 42 has an air outlet 423 communicating with the receiving groove 411, and the filter 43 is detachably connected to the air outlet 423. The filter 43 effectively reduces the entry of insects, dust, and other impurities into the chassis 41 through the air inlet 412 or the air outlet 423, effectively enhancing the cleanliness of the environment inside the chassis 4.

[0057] Optionally, a magnetic strip is provided on the outer edge of the filter screen 43. The filter screen 43 is attracted to the outside of the housing 41 by the magnetic strip to realize the installation, disassembly and maintenance of the filter screen 43, which is convenient, quick and saves time and effort.

[0058] Preferably, a drain outlet is also provided through the bottom of the receiving tank 411. The drain outlet facilitates the drainage of leaked coolant from the pipe connections of the piping system 2, reducing the impact of coolant leakage on the electronic structures inside the housing 41 and improving the operational safety of the battery cluster liquid cooling unit. Furthermore, the bottom of the receiving tank 411 can be slightly inclined, i.e., the inclined bottom of the receiving tank 411 slopes from the end furthest from the drain outlet towards the end closest to the drain outlet. This inclined bottom helps guide leaked coolant to the drain outlet.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cluster liquid cooling unit, characterized by, The application relates to a heat dissipation assembly (1) and a pipeline system (2) thereof. The pipeline system (2) comprises a first connecting pipe (21) and a second connecting pipe (22), the heat exchanger (11) is provided with a first connecting port (111) and a second connecting port (112), the first connecting pipe (21) is connected with the first connecting port (111), the second connecting pipe (22) is connected with the second connecting port (112) through a main pipeline (23) and a bypass pipeline (24) arranged in parallel, and the main pipeline (23) and the bypass pipeline (24) are both provided with a pump body (25) and a first valve (26). The pipeline system (2) further comprises a third connecting pipe (27), one ends of the main pipeline (23) and the bypass pipeline (24) away from the second connecting pipe (22) are connected with the third connecting pipe (27), one end of the third connecting pipe (27) away from the main pipeline (23) and the bypass pipeline (24) is connected with the second connecting port (112), the second connecting port (112) is a liquid outlet port, and the first connecting port (111) is a liquid inlet port.

2. The battery cluster liquid cooling unit according to claim 1, characterized by, The pipeline system (2) further comprises an expansion tank (28), and the expansion tank (28) is connected with the third connecting pipe (27).

3. The battery cluster liquid cooling unit of claim 2, wherein, The pipeline system (2) further comprises a check valve (29), the check valve (29) is arranged on one sides of the pump body (25) close to the second connecting pipe (22).

4. The battery cluster liquid cooling unit of claim 2, wherein, The pipeline system (2) further comprises a flowmeter (30) and a liquid supplementing pipe (31), the flowmeter (30) is arranged on the third connecting pipe (27), one end of the liquid supplementing pipe (31) is communicated with the third connecting pipe (27), the liquid supplementing pipe (31) is provided with a second valve (32), and one end of the liquid supplementing pipe (31) away from the third connecting pipe (27) is connected with an external water tank.

5. The battery cluster liquid cooling unit of claim 2, wherein, The pipeline system (2) further comprises a filter (33), and the filter (33) is detachably arranged on the first connecting pipe (21); and / or, 6. The battery cluster liquid cooling unit of claim 2, wherein, The filter (33) is detachably arranged on the third connecting pipe (27). The pipeline system (2) further comprises a liquid supply pressure sensor (35), and the liquid supply pressure sensor (35) is arranged on the second connecting pipe (22); and / or, 7. The battery cluster liquid cooling unit according to any one of claims 1-6, characterized in that, The pipeline system (2) further comprises a temperature sensor (36), and the temperature sensor (36) is arranged on the second connecting pipe (22); and / or, The pipeline system (2) further comprises a vacuumizing pipe (37), the vacuumizing pipe (37) is connected with the second connecting pipe (22), and the vacuumizing pipe (37) is provided with a fourth valve (38); and / or, The pipeline system (2) further comprises an automatic exhaust valve (39), and the automatic exhaust valve (39) is arranged on the second connecting pipe (22); and / or, ​ The heat dissipation assembly (1) further comprises a fan (12) arranged on the heat exchanger (11), and the fan (12) is used for discharging heat generated by the heat exchanger (11).

8. The battery cluster liquid cooling unit according to any one of claims 1-6, characterized in that, The battery cluster liquid cooling unit further comprises a cabinet (4), the cabinet (4) comprises a box body (41) and a box cover (42) which are detachably connected, the box body (41) is provided with a containing groove (411), the heat dissipation assembly (1) and the pipeline system (2) are arranged in the containing groove (411), and the box cover (42) is used for plugging the slot opening of the containing groove (411).

9. The battery cluster liquid cooling unit of claim 8, wherein, The box cover (42) comprises a cover body (421) and a flip cover (422), the cover body (421) is used for plugging the slot opening of the containing groove (411), the cover body (421) is provided with a maintenance opening (4211), the flip cover (422) is rotatably connected to the cover body (421), the flip cover (422) is used for closing or opening the maintenance opening (4211), and the pipeline system (2) is located below the maintenance opening (4211).

10. The battery cluster liquid cooling unit of claim 8, wherein, The cabinet (4) further comprises a filter screen (43), at least one side surface of the box body (41) is provided with an air inlet (412), and the filter screen (43) is detachably connected at the air inlet (412); and / or, The box cover (42) is provided with an air outlet (423) communicated with the containing groove (411), and the filter screen (43) is detachably connected at the air outlet (423).

11. The battery cluster liquid cooling unit of claim 8, wherein, The bottom of the containing groove (411) is further provided with a liquid leakage opening.

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