Battery cluster and PCS parallel energy-saving liquid cooling system

Abstract

The utility model relates to the technical field of energy storage and temperature control, in particular to a battery cluster and PCS parallel energy-saving liquid cooling system, which comprises a refrigeration module, a hydraulic module and a battery cluster, the hydraulic module is connected with the battery cluster and is used for taking out heat of the battery cluster; the refrigeration module is connected with the hydraulic module and is used for carrying out heat exchange with the hydraulic module, the system further comprises a PCS liquid cooling module and a PCS, and the PCS liquid cooling module is used for carrying out heat exchange on the PCS; the hydraulic module comprises a first parallel branch connected with the PCS liquid cooling module and a second parallel branch connected with the battery cluster, the first parallel branch is used for performing heat exchange on the PCS liquid cooling module, and the second parallel branch is used for performing heat exchange on the battery cluster. The battery cluster and the PCS share one liquid cooling system, the functions of compression refrigeration, fluorine pump refrigeration and dehumidification are integrated at the same time, the energy consumption is reduced, the installation space and the cost are saved, the system can be dehumidified while heat dissipation and cooling are met, and the risk of condensation of the system is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage temperature control, and more specifically, to a battery cluster and PCS parallel energy-saving liquid cooling system. Background Art

[0002] In recent years, my country's energy storage sector has flourished. With the planning and construction of hundreds of 100-megawatt energy storage projects, the scale of the energy storage industry continues to expand. Most of these energy storage projects are presented in the form of independent energy storage and shared energy storage. However, these independent energy storage and shared energy storage modes face multiple challenges such as safety, efficiency and economy during construction. Against this background, liquid-cooled energy storage technology has become an effective means to solve these problems with its advantages in efficient thermal management capabilities. Since the thermal characteristics of batteries have an important influence on the performance of energy storage systems, thermal management has become an indispensable part of the electrochemical energy storage industry chain. Liquid cooling technology uses liquid media for heat exchange, and uses the large specific heat capacity and rapid cooling characteristics of liquids to achieve efficient heat dissipation of batteries and improve the energy conversion efficiency of energy storage systems.

[0003] With the rapid development of new energy power, large-scale and high-capacity energy storage power stations are accelerating the release of their potential. As an important part of the energy storage system, the performance of the thermal management system directly affects the operating efficiency and safety of the energy storage power station. Therefore, with the continuous growth of energy storage installed capacity, the scale of the energy storage temperature control market will continue to expand.

[0004] Existing technologies mainly use water cooling units to provide cold or hot sources to meet the cooling or heating needs of battery cells or PCS. However, this method can only control the flow and direction of the cooling medium, but cannot achieve precise control of the PCS and battery cell temperature, resulting in waste of cooling capacity, reduced energy efficiency, and condensation, which poses a safety hazard. Utility Model Content

[0005] The utility model aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide a battery cluster and PCS parallel energy-saving liquid cooling system, which can simultaneously meet the needs of heat dissipation and cooling of the battery cluster and the PCS, reduce the energy consumption and operating cost of the liquid cooling system, and save energy on occupied space.

[0006] The technical solution adopted by the utility model is: to provide a battery cluster and PCS parallel energy-saving liquid cooling system, including a refrigeration module, a hydraulic module and a battery cluster; the refrigeration module is connected to the hydraulic module for heat exchange with the hydraulic module, and also includes a PCS liquid cooling module and a PCS, the PCS liquid cooling module is used for heat exchange with the PCS; the hydraulic module includes a first parallel branch connected to the PCS liquid cooling module and a second parallel branch connected to the battery cluster, the first parallel branch is used for heat exchange with the PCS liquid cooling module, and the second parallel branch is used for heat exchange with the battery cluster.

[0007] The utility model arranges two parallel branches in the hydraulic module to bring out the heat of the battery cluster and the PCS respectively, and uses the refrigeration module to centrally and uniformly dissipate and cool the heat brought out by the hydraulic module, thereby achieving an integrated solution to the cooling problem and saving the energy consumption and installation space of the system.

[0008] Furthermore, the PCS liquid cooling module includes a second evaporator and a second water pump, the second evaporator, the second water pump and the PCS are connected in sequence to form a PCS liquid cooling circulation loop, the second evaporator is connected to the hydraulic module to form the first parallel branch, which is used for heat exchange with the hydraulic module, and the second water pump is used to drive the circulation of liquid in the PCS liquid cooling circulation loop.

[0009] The liquid in the PCS liquid cooling circulation loop takes out the heat of the PCS under the drive of the second water pump, and exchanges heat with the hydraulic module through the second evaporator, effectively improving the efficiency of heat dissipation of the PCS.

[0010] Furthermore, the refrigeration module includes a compression refrigeration unit and a fluorine pump refrigeration unit, and both the compression refrigeration unit and the fluorine pump refrigeration unit are connected to the hydraulic module for heat exchange with the hydraulic module.

[0011] Two different refrigeration and heat dissipation units, compression refrigeration unit and fluorine pump refrigeration unit, are used to cool down the PCS and battery cluster. The appropriate refrigeration mode can be selected according to different ambient temperatures, which is more flexible, reliable and energy-saving.

[0012] Furthermore, a dehumidification unit is included, and the dehumidification unit is connected to the compression refrigeration unit and is used to dehumidify the installation environment of the battery cluster and the PCS.

[0013] By using the dehumidification unit to dehumidify the high-humidity air in the system, the impact of humid air on the electrical components in the energy storage container can be reduced, thereby improving the stability of system operation.

[0014] Furthermore, the dehumidification unit includes a dehumidification evaporator and a first fan; the dehumidification evaporator is connected to the compression refrigeration unit; the first fan is used for convection to make the battery cluster and the PCS exchange heat with the dehumidification evaporator.

[0015] Through the forced convection of the first fan, the high-humidity air inside the container exchanges heat with the dehumidification evaporator, and the moisture in the high-humidity air condenses and precipitates under the heat absorption and evaporation of the refrigerant in the dehumidification evaporator, thereby achieving dehumidification.

[0016] Furthermore, a second expansion valve is provided at the inlet of the dehumidification unit, and the second expansion valve is used to independently control the evaporation pressure of the dehumidification evaporator.

[0017] Furthermore, the dehumidification unit further comprises an air PTC heater, and the air PTC heater is used to provide heat compensation for the air delivered by the dehumidification unit.

[0018] The air PTC heater performs thermal compensation on the dehumidified air, so that the ambient air temperature entering the battery cluster and PCS is maintained within a suitable range, effectively improving the stability and energy efficiency of the energy storage container operation.

[0019] Specifically, the hydraulic module includes a first water pump, a first PTC heater and a three-way valve, the first output port of the three-way valve is connected to the input end of the first parallel branch, the second output port of the three-way valve is connected to the input end of the second parallel branch, the output end of the first parallel branch and the output end of the second parallel branch are merged and connected to the inlet of the first water pump, the output port of the first water pump, the first PTC heater, the refrigeration module, and the input port of the three-way valve are connected in series in sequence.

[0020] The coolant in the hydraulic module is diverted to the first parallel branch and the second parallel branch through a three-way valve, and the coolant flow in the two branches can be adjusted as needed, making the heat dissipation of each heat dissipation object in the system more accurate and flexible. The PTC heater can be turned on when the coolant temperature in the hydraulic module is too low, providing thermal compensation for the coolant, so that the system has cooling or heating functions, which can meet the different cooling and heating needs of the system.

[0021] Specifically, the compression refrigeration unit includes a first evaporator, a compressor, a first one-way valve, a condenser, a liquid storage tank, a second one-way valve and a first expansion valve; the first evaporator, the compressor, the first one-way valve, the condenser, the liquid storage tank, the second one-way valve and the first expansion valve are connected in sequence to form a compression refrigeration cycle, and the compression refrigeration unit performs heat exchange with the hydraulic module through the first evaporator.

[0022] Specifically, the fluorine pump refrigeration unit includes a third one-way valve and a fluorine pump; the first evaporator, the third one-way valve, the condenser, the liquid storage tank, the fluorine pump and the first expansion valve are connected in sequence to form a fluorine pump refrigeration cycle, and the fluorine pump refrigeration unit performs heat exchange with the hydraulic module through the evaporator.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] (1) The utility model dissipates heat from the system by using a liquid cooling method using a coolant. The coolant in the liquid cooling system can be isolated from the battery cluster and the PCS for heat exchange, and the heat dissipation effect is more efficient and energy-saving.

[0025] (2) The utility model adopts a refrigeration unit with two different modes: compression refrigeration and fluorine pump refrigeration. The appropriate refrigeration mode can be selected according to different ambient temperatures, thereby improving the reliability and energy saving of the system and saving installation space and operating costs.

[0026] (3) The battery cluster and PCS of the utility model share a liquid cooling system for heat dissipation and temperature reduction through branch parallel connection, which can simultaneously meet the temperature control of two heat dissipation objects, saving installation space and operating costs;

[0027] (4) The utility model has a dehumidification and heating function, and the installation environment of the battery cluster and the PCS is dehumidified and heated by the dehumidification unit, thereby avoiding the risk of condensation causing safety hazards to the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a circuit structure diagram of Example 1 of the utility model;

[0029] Figure 2 This is a circuit structure diagram of Embodiment 2 of the present utility model;

[0030] Figure 3 This is a circuit structure diagram of Example 3 of the utility model.

[0031] Figure markings: 1-compressor; 2-first one-way valve; 3-condenser; 4-second fan; 5-liquid storage tank; 6-fluorine pump; 7-second one-way valve; 8-first expansion valve; 9-first evaporator; 10-third one-way valve; 11-first water pump; 12-first PTC heater; 13-three-way valve; 14-battery cluster; 15-expansion tank; 16-second evaporator; 17-second water pump; 18-PCS; 19-second expansion valve; 20-dehumidification evaporator; 21-first fan; 22-air PTC heater. DETAILED DESCRIPTION

[0032] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0033] Example 1

[0034] like Figure 1 As shown, this embodiment provides a battery cluster and PCS parallel energy-saving liquid cooling system, including a refrigeration module, a hydraulic module and a battery cluster 14; the refrigeration module is connected to the hydraulic module for heat exchange with the hydraulic module, and also includes a PCS liquid cooling module and PCS18, the PCS liquid cooling module is used to heat exchange PCS18; the hydraulic module includes a first parallel branch connected to the PCS liquid cooling module and a second parallel branch connected to the battery cluster 14, the first parallel branch is used to heat exchange the PCS liquid cooling module, and the second parallel branch is used to heat exchange the battery cluster 14.

[0035] Among them, the PCS liquid cooling module is used to perform heat exchange on PCS18, and the heat of PCS18 is absorbed by the coolant in the PCS liquid cooling module. The hydraulic module is provided with two parallel branches, wherein the first parallel branch is connected to the battery cluster 14, and the second parallel branch is connected to the PCS liquid cooling module. When working, part of the coolant in the hydraulic module pipeline is diverted to the first parallel branch to take out the heat of the battery cluster 14, and the other part of the coolant is diverted to the second parallel branch to take out the heat of the PCS liquid cooling module. Finally, the coolant of the two parallel branches converges into the main pipeline of the hydraulic module and is centrally cooled and heat-dissipated by the refrigeration module.

[0036] This embodiment connects the PCS liquid cooling module and the battery cluster 14 in parallel for heat dissipation, and uses a refrigeration module to adjust the temperature of the battery cluster 14 and the PCS 18, making full use of the heat dissipation capacity of the hydraulic module and improving the energy utilization rate of the entire system.

[0037] In this embodiment, Figure 1 As shown, the PCS liquid cooling module includes a second evaporator 16 and a second water pump 17. The second evaporator 16, the second water pump 17 and the PCS 18 are connected in sequence through pipelines to form a PCS 18 liquid cooling circulation loop. The second evaporator 16 is connected to the hydraulic module to form the first parallel branch for heat exchange with the hydraulic module. The second water pump 17 is used to drive the coolant in the PCS liquid cooling circulation loop to circulate. The coolant in the PCS liquid cooling module absorbs the heat of the PCS 18, flows through the second evaporator 16 driven by the second water pump 17, and exchanges heat with the liquid in the hydraulic module through the second evaporator 16. After cooling, it flows into the second water pump 17 to complete the coolant circulation of the PCS liquid cooling module.

[0038] In some optional embodiments, the hydraulic module includes a first water pump 11 and a three-way valve 13 .

[0039] Among them, the first output port of the three-way valve 13 is connected to the input end of the first parallel branch, and the second output port of the three-way valve 13 is connected to the input end of the second parallel branch. The output end of the first parallel branch and the output end of the second parallel branch are then converged and connected to the inlet of the first water pump 11. The output port of the first water pump 11, the refrigeration module, and the input port of the three-way valve 13 are connected in series in sequence. The first parallel branch is connected to the second evaporator 16. When the coolant in the PCS liquid cooling module enters the second evaporator 16, it is isolated from the coolant in the first parallel branch for heat exchange, thereby achieving the effect of cooling and heat dissipation.

[0040] In practical applications, in order to meet the operating temperature requirements of the battery cluster 14 and the PCS 18, the flow of the coolant in the first parallel branch and the second parallel branch is flexibly adjusted and allocated through the three-way valve 13. In this embodiment, since the operating temperature ranges of the battery cluster 14 and the PCS 18 are quite different, the battery cluster 14 is suitable for working at a relatively low temperature, while the PCS 18 needs to operate at a relatively high temperature. Therefore, the opening of the three-way valve 13 can be adjusted so that the first parallel branch for dissipating heat for the PCS liquid cooling module obtains less coolant, and most of the coolant is allocated to the second parallel branch for dissipating heat for the battery cluster 14, thereby realizing a reasonable allocation of the coolant flow in the hydraulic module and meeting the operating temperature requirements of different heat dissipation objects.

[0041] In some cases, even if most of the coolant is allocated to the second parallel branch, it may still not be able to meet the heat dissipation requirements of the battery cluster 14. At this time, the three-way valve 13 can be further adjusted to allow all the coolant in the hydraulic module to flow to the second parallel branch. This allows the battery cluster 14 to be fully cooled. Although the lack of coolant allocation in the first parallel branch may have a certain impact on the operating temperature of PCS18, due to its relatively high operating temperature range, this impact is acceptable for a period of time. After the temperature of the battery cluster 14 drops to the target temperature, the three-way valve 13 is adjusted to divert part of the coolant in the hydraulic module to the first parallel branch to cool and dissipate heat for the PCS liquid cooling module, thereby achieving a reasonable distribution of coolant flow in the hydraulic module.

[0042] In order to heat the coolant in the hydraulic module, the present embodiment further adds a first PTC heater 12. Specifically, the first PTC heater 12 is arranged in the pipeline between the first water pump 11 and the three-way valve 13, and is mainly used to heat the coolant in the hydraulic circulation loop when the temperature of the liquid in the hydraulic circulation loop is too low, so as to prevent the working performance of the PCS 18 and the battery cluster 14 from being affected by the low temperature of the coolant. Of course, the first PTC heater 12 can also be arranged in the main pipeline connected to the input port of the first water pump 11.

[0043] In addition, an expansion tank 15 is also provided in the pipeline connected to the input port of the first water pump 11. The expansion tank 15 is mainly used to stabilize the pressure of the coolant in the hydraulic module.

[0044] The refrigeration module of this embodiment includes a compression refrigeration unit and a fluorine pump refrigeration unit, and the compression refrigeration unit and the fluorine pump refrigeration unit are connected to the hydraulic module for heat exchange with the hydraulic module.

[0045] Specifically, the compression refrigeration unit includes a first evaporator 9, a compressor 1, a first one-way valve 2, a condenser 3, a liquid storage tank 5, a second one-way valve 7 and a first expansion valve 8; the first evaporator 9, the compressor 1, the first one-way valve 2, the condenser 3, the liquid storage tank 5, the second one-way valve 7 and the first expansion valve 8 are connected in sequence to form a compression refrigeration cycle, and the compression refrigeration unit performs heat exchange with the hydraulic module through the first evaporator 9.

[0046] The fluorine pump refrigeration unit includes a third one-way valve 10 and a fluorine pump 6; a fluorine pump refrigeration cycle is formed by connecting the first evaporator 9, the third one-way valve 10, the condenser 3, the liquid storage tank 5, the fluorine pump 6 and the first expansion valve 8 in sequence, and the fluorine pump refrigeration cycle is formed, and the fluorine pump refrigeration unit performs heat exchange with the hydraulic module through the first evaporator 9.

[0047] The refrigeration module is also provided with a second fan 4, which is used to force convection to accelerate the air flow on the surface of the condenser 3. As the airflow generated by the second fan 4 continuously blows through the condenser 3, the heat on the condenser 3 is quickly taken away and discharged to the outdoor environment, thereby achieving effective heat dissipation of the entire system. In actual application, the second fan 4 can be set near the condenser 3, for example, behind the condenser 3. The specific setting position can be determined according to actual conditions, and only examples are given here for specific explanation.

[0048] By setting up a compression refrigeration unit and a fluorine pump refrigeration unit, the refrigeration module has two different refrigeration modes: compression refrigeration mode and fluorine pump refrigeration mode, so that the system can flexibly adapt to different ambient temperatures and heat dissipation requirements, thereby improving the accuracy of temperature control and the energy efficiency of refrigeration. At the same time, the compression refrigeration unit and the fluorine pump refrigeration unit share some pipelines, such as the shared condenser 3, the second fan 4, the liquid storage tank 5, the first expansion valve 8 and the first evaporator 9, etc., saving space and manufacturing costs. It should be noted that the compression refrigeration mode is to start the compression refrigeration unit; the fluorine pump refrigeration mode is to start the fluorine pump refrigeration unit.

[0049] In some embodiments, the compression refrigeration unit can adopt an air-cooled variable frequency direct expansion refrigeration system. When the ambient temperature is greater than the preset switching temperature, the compression refrigeration mode is turned on to ensure that at least one branch is working in the same period. During operation, the coolant of the hydraulic module absorbs the heat of the battery cluster 14 and the PCS 18, and transfers the heat of the coolant to the refrigerant in the first evaporator 9 through the first evaporator 9. The refrigerant in the first evaporator 9 absorbs heat and evaporates and then returns to the compressor 1. The compressor 1 compresses the low-temperature and low-pressure gas into high-temperature and high-pressure gas, which enters the condenser 3 through the first one-way valve 2 and dissipates the heat to the outdoor environment through the forced convection of the second fan 4, thereby condensing the high-temperature and high-pressure gas into medium-temperature and high-pressure liquid, which enters the first expansion valve 8 through the liquid storage tank 5 and the second one-way valve 7 to throttle and reduce the pressure into a low-temperature and low-pressure gas-liquid mixture, and then enters the first evaporator 9 to absorb heat and evaporate into a low-temperature and low-pressure gas, thereby forming a closed cycle of compression refrigeration.

[0050] In this embodiment, the fluorine pump refrigeration mode mainly uses the latent heat of phase change of the refrigerant to take away the heat of the battery cluster 14 and the PCS 18. When the fluorine pump refrigeration mode is used, there is no need to start the compressor 1. Compared with the compression refrigeration mode, it is more efficient and energy-saving, and is suitable for use in low temperature climates. When the ambient temperature is less than or equal to the preset switching temperature, the fluorine pump refrigeration mode is started and the compression refrigeration mode is turned off to ensure that at least one branch is working in the same period. When the fluorine pump refrigeration mode is turned on, the refrigerant in the refrigeration system is pumped into the first expansion valve 8 by the running fluorine pump 6, and a low-temperature and low-pressure gas-liquid mixture is formed after throttling and reducing the pressure of the first expansion valve 8. The gas-liquid mixture then enters the first evaporator 9 and is isolated from the coolant of the hydraulic module that absorbs the heat of the battery cluster 14 and PCS18 for heat exchange. After the refrigerant absorbs heat and evaporates, it enters the condenser 3 through the third one-way valve 10 and dissipates the heat of the system to the outdoor environment through the second fan 4 through forced convection, forming a medium-temperature and high-pressure refrigerant liquid through the liquid storage tank 5, and then the refrigerant is pumped into the first expansion valve 8 by the fluorine pump 6 to throttle and reduce the pressure to form a low-temperature and low-pressure gas-liquid mixture and return to the first evaporator 9, thereby forming a fluorine pump refrigeration closed cycle. The refrigeration system adopts a design of integrated compression refrigeration and fluorine pump refrigeration. When in use, different refrigeration modes can be turned on according to different ambient temperatures and heat dissipation requirements, making the refrigeration system of this embodiment more efficient and energy-saving, improving the system's low-temperature startup performance, enhancing environmental adaptability, and more helpful in extending the service life of the compressor 1 and the battery.

[0051] In this embodiment, the heat of the battery cluster 14 and PCS 18 is removed by the hydraulic module, and the heat removed by the hydraulic module is centrally and uniformly dissipated and cooled by the compression refrigeration unit and the fluorine pump refrigeration unit, thereby achieving an integrated solution to the cooling problem and saving the system's energy consumption and occupied space.

[0052] Example 2

[0053] like Figure 2As shown, this embodiment provides a battery cluster and PCS parallel energy-saving liquid cooling system. Different from Embodiment 1, the compression refrigeration unit of this embodiment leads out a branch as a dehumidification unit, which is used to control the air humidity of related electrical components and circuits such as the battery cluster 14 and PCS 18, thereby improving the safety and reliability of the entire energy storage system. The dehumidification unit includes a dehumidification evaporator 20 and a first fan 21; the inlet of the dehumidification evaporator 20 is connected between the second one-way valve 7 and the first expansion valve 8, and the outlet of the dehumidification evaporator 20 is connected to the inlet of the compressor 1; the first fan 21 is used for convection to make the heat dissipation object and the dehumidification evaporator 20 exchange heat. A second expansion valve 19 is also provided at the inlet of the dehumidification unit, and the second expansion valve 19 is used to independently control the evaporation pressure of the dehumidification evaporator 20. When dehumidification is required, the system switches to compression refrigeration mode, i.e., the compression refrigeration unit is started and the fluorine pump refrigeration unit is turned off at the same time. The first fan 21 forces convection, so that the high-humidity air inside the energy storage container exchanges heat with the dehumidification evaporator 20. The moisture carried by the high-humidity air condenses and precipitates under the heat absorption and evaporation of the refrigerant in the dehumidification evaporator 20, and the low-temperature and low-humidity air after the heat exchange is sent to the battery cluster 14 and PCS 18, thereby realizing the dehumidification function of the system. Using an integrated compression refrigeration and dehumidification system to realize the refrigeration and dehumidification functions can reduce the impact of humid air on the electrical components and electronic circuits of the energy storage container, improve the stability of the energy storage system operation, save a certain amount of space and cost, and facilitate installation and operation and maintenance.

[0054] Example 3

[0055] like Figure 3 As shown, this embodiment provides a battery cluster and PCS parallel energy-saving liquid cooling system. Based on Example 2, this embodiment superimposes an air PTC heater 22 on the dehumidification evaporator 20. When the air temperature after heat exchange with the dehumidification evaporator 20 is too low, the low-temperature air will reduce the working performance of the battery cluster 14 and the PCS 18. At this time, the air PTC heater 22 can be used to perform thermal compensation with the low-temperature and low-humidity air after heat exchange with the dehumidification evaporator 20, thereby further controlling the air temperature and humidity sent to the battery cluster 14 and the PCS 18, so that the battery cluster 14 and the PCS 18 can maintain efficient operation within a suitable temperature range. This embodiment can control whether to turn on the air PTC heater 22 for thermal compensation according to the air temperature and humidity in the battery cluster 14 and the PCS 18, further improving the reliability and working performance of the energy storage container, while optimizing the energy efficiency of the energy storage system.

[0056] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A battery cluster and PCS parallel energy-saving liquid cooling system, comprising a refrigeration module, a hydraulic module and a battery cluster; the refrigeration module is connected to the hydraulic module for heat exchange with the hydraulic module, characterized in that: It also includes a PCS liquid cooling module and a PCS, wherein the PCS liquid cooling module is used to perform heat exchange on the PCS; the hydraulic module includes a first parallel branch connected to the PCS liquid cooling module and a second parallel branch connected to the battery cluster, wherein the first parallel branch is used to perform heat exchange on the PCS liquid cooling module, and the second parallel branch is used to perform heat exchange on the battery cluster.

2. A battery cluster and PCS parallel energy-saving liquid cooling system according to claim 1, characterized in that: The PCS liquid cooling module includes a second evaporator and a second water pump. The second evaporator, the second water pump and the PCS are connected in sequence to form a PCS liquid cooling circulation loop. The second evaporator is connected to the hydraulic module to form the first parallel branch for heat exchange with the hydraulic module. The second water pump is used to drive the circulation of liquid in the PCS liquid cooling circulation loop.

3. The battery cluster and PCS parallel energy-saving liquid cooling system according to claim 1, characterized in that: The refrigeration module comprises a compression refrigeration unit and a fluorine pump refrigeration unit, and both the compression refrigeration unit and the fluorine pump refrigeration unit are connected to the hydraulic module for heat exchange with the hydraulic module.

4. A battery cluster and PCS parallel energy-saving liquid cooling system according to claim 3, characterized in that: A dehumidification unit is also included, and the dehumidification unit is connected to the compression refrigeration unit and is used to dehumidify the installation environment of the battery cluster and the PCS.

5. A battery cluster and PCS parallel energy-saving liquid cooling system according to claim 4, characterized in that: The dehumidification unit includes a dehumidification evaporator and a first fan; the dehumidification evaporator is connected to the compression refrigeration unit; the first fan is used for convection to make the battery cluster and the PCS exchange heat with the dehumidification evaporator.

6. A battery cluster and PCS parallel energy-saving liquid cooling system according to claim 5, characterized in that: The inlet of the dehumidification unit is also provided with a second expansion valve, and the second expansion valve is used to independently control the evaporation pressure of the dehumidification evaporator.

7. A battery cluster and PCS parallel energy-saving liquid cooling system according to any one of claims 4 to 6, characterized in that: The dehumidification unit further comprises an air PTC heater, and the air PTC heater is used to provide heat compensation for the air delivered by the dehumidification unit.

8. A battery cluster and PCS parallel energy-saving liquid cooling system according to any one of claims 1 to 6, characterized in that: The hydraulic module includes a first water pump, a first PTC heater and a three-way valve, the first output port of the three-way valve is connected to the input end of the first parallel branch, the second output port of the three-way valve is connected to the input end of the second parallel branch, the output end of the first parallel branch and the output end of the second parallel branch are merged and connected to the inlet of the first water pump, the output port of the first water pump, the first PTC heater, the refrigeration module, and the input port of the three-way valve are connected in series in sequence.

9. A battery cluster and PCS parallel energy-saving liquid cooling system according to any one of claims 3 to 6, characterized in that: The compression refrigeration unit includes a first evaporator, a compressor, a first one-way valve, a condenser, a liquid storage tank, a second one-way valve and a first expansion valve; the first evaporator, the compressor, the first one-way valve, the condenser, the liquid storage tank, the second one-way valve and the first expansion valve are connected in sequence to form a compression refrigeration cycle, and the compression refrigeration unit performs heat exchange with the hydraulic module through the first evaporator.

10. A battery cluster and PCS parallel energy-saving liquid cooling system according to claim 9, characterized in that: The fluorine pump refrigeration unit includes a third one-way valve and a fluorine pump; the first evaporator, the third one-way valve, the condenser, the liquid storage tank, the fluorine pump and the first expansion valve are connected in sequence to form a fluorine pump refrigeration cycle, and the fluorine pump refrigeration unit performs heat exchange with the hydraulic module through the evaporator.

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