CN118336214A

CN118336214A - Temperature control system integrating battery cluster of fluorine pump and PCS parallel liquid cooling and control method thereof

Info

Publication number: CN118336214A
Application number: CN202410562404.3A
Authority: CN
Inventors: 王璇; 齐洋州; 叶春锦; 陈健豪; 王鹏; 李铠
Original assignee: Guangdong Shenling Environmental Systems Co Ltd
Current assignee: Guangdong Shenling Environmental Systems Co Ltd
Priority date: 2024-05-08
Filing date: 2024-05-08
Publication date: 2024-07-12

Abstract

The invention relates to the technical field of energy storage temperature control, in particular to a temperature control system integrating parallel liquid cooling of a battery cluster and PCS of a fluorine pump and a control method thereof, comprising a control system, and a compression refrigeration unit, a fluorine pump refrigeration unit, a driving module, a battery cluster, a PCS and a PCS liquid cooling module which are all connected with the control system; the PCS liquid cooling module is connected with the PCS and used for carrying out heat exchange on the PCS; the driving module comprises a first parallel branch connected with the PCS liquid cooling module and a second parallel branch connected with the battery cluster, wherein the first parallel branch is used for carrying out heat exchange on the PCS liquid cooling module, and the second parallel branch is used for carrying out heat exchange on the battery cluster; the compression refrigeration unit and the fluorine pump refrigeration unit are connected with the driving module and used for carrying out heat exchange with the driving module. According to the invention, two parallel branches are arranged to respectively carry out heat of the PCS and the battery cluster, and concentrated heat dissipation and cooling treatment are carried out through the compression refrigeration unit and the fluorine pump refrigeration unit, so that the integrated cooling problem solving is realized, and the energy consumption and the space are saved.

Description

Temperature control system integrating battery cluster of fluorine pump and PCS parallel liquid cooling and control method thereof

Technical Field

The invention relates to the technical field of energy storage temperature control, in particular to a temperature control system for parallel liquid cooling of a battery cluster and PCS of an integrated fluorine pump and a control method thereof.

Background

In recent years, the energy storage field of China is vigorously developed, and along with the planning and construction of hundreds of hundred megawatt-level energy storage projects, the scale of the energy storage industry is continuously expanded. 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 in construction, safety, efficiency and economy. In this context, liquid-cooled energy storage technology has the advantage of efficient thermal management capabilities as an effective means of solving these challenges. Because the thermal characteristics of the battery have important influence on the performance of the energy storage system, the thermal management becomes an indispensable ring in the electrochemical energy storage industry chain, the liquid cooling technology performs heat exchange through a liquid medium, and the characteristics of high specific heat capacity, rapid cooling and the like of the liquid are utilized, so that the efficient heat dissipation of the battery is realized, and the energy conversion efficiency of the energy storage system is improved.

With the rapid development of new energy power, large-scale high-capacity energy storage power stations are accelerating to release their potential. As an important component 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, as the capacity of the energy storage machine is continuously increased, the scale of the energy storage temperature control market is continuously expanded.

The prior art mainly provides a cold source or a heat source through a water cooling unit to meet the refrigeration or heating requirements of the battery cell or the PCS. However, this method can only control the flow and trend of the cooling medium, but cannot realize accurate control over the PCS and the cell temperature, so that the waste of the cooling capacity, the reduction of the energy efficiency and the occurrence of condensation cause potential safety hazards.

Disclosure of Invention

The invention aims to overcome at least one defect (deficiency) of the prior art, and provides a temperature control system for parallel liquid cooling of a battery cluster and PCS of an integrated fluorine pump and a control method thereof, which can simultaneously meet the requirements of heat dissipation and cooling of the battery cluster and PCS, obviously reduce the energy consumption and the operation cost of the liquid cooling system, optimize the space occupation and improve the overall energy efficiency and the reliability.

The technical scheme adopted by the invention is as follows: a temperature control system integrating a battery cluster of a fluorine pump and PCS parallel liquid cooling comprises a control system, and a compression refrigeration unit, a fluorine pump refrigeration unit, a driving module, a battery cluster, a PCS and a PCS liquid cooling module which are all connected with the control system; the PCS liquid cooling module is connected with the PCS and is used for carrying out heat exchange on the PCS; the driving module comprises a first parallel branch connected with the PCS liquid cooling module and a second parallel branch connected with the battery cluster, wherein the first parallel branch is used for carrying out heat exchange on the PCS liquid cooling module, and the second parallel branch is used for carrying out heat exchange on the battery cluster; the compression refrigeration unit and the fluorine pump refrigeration unit are connected with the driving module and used for carrying out heat exchange with the driving module.

The heat quantity of the PCS and the battery cluster is respectively carried out by the first parallel branch and the second parallel branch, and the heat quantity carried out by the driving module is subjected to centralized and unified heat dissipation and cooling treatment by the compression refrigerating unit and the fluorine pump refrigerating unit, so that the integrated cooling problem solving is realized, and the energy consumption and the space are saved.

Further, the PCS liquid cooling module comprises a heat exchanger and a first driving mechanism; the heat exchanger, the first driving mechanism and the PCS are sequentially connected to form a PCS liquid cooling circulation loop; the heat exchanger is connected with the driving module to form a first parallel branch circuit for performing heat exchange with the driving module, and the first driving mechanism is used for driving liquid in the PCS liquid cooling circulation loop to circulate. The cooling liquid in the PCS liquid cooling circulation loop absorbs heat of the PCS, and the heat is brought out through the first driving mechanism and flows through the heat exchanger to exchange heat with the hydraulic module, so that heat dissipation and cooling of the PCS are effectively achieved.

Specifically, the driving module comprises a second driving mechanism, a PTC heater and a three-way valve, a first output port of the three-way valve is connected with an input end of the first parallel branch, a second output port of the three-way valve is connected with an input end of the second parallel branch, output ends of the first parallel branch and the second parallel branch are converged and then connected with an input port of the second driving mechanism, an output port of the second driving mechanism is connected with the PTC heater, and a compression refrigerating unit and a fluorine pump refrigerating unit are connected between input ports of the PTC heater and the three-way valve.

The flow of the first parallel branch and the flow of the second parallel branch are regulated and distributed through a three-way valve according to the requirement, so that the flexible control of the temperature of the battery cluster and the PCS is realized.

Further, the compression refrigeration unit comprises a compressor, a first one-way valve, a condenser, a liquid storage tank, a second one-way valve, a first expansion valve and an evaporator which are sequentially connected through pipelines to form a compression refrigeration cycle; the fluorine pump refrigerating unit comprises a third one-way valve, a condenser, a liquid storage tank, a fluorine pump, a first expansion valve and an evaporator which are sequentially connected through pipelines to form a fluorine pump refrigerating circulation loop; the system also comprises a first fan, wherein the first fan is used for blowing and radiating heat to the condenser; the compression refrigeration cycle loop and the fluorine pump refrigeration cycle loop share the condenser, the evaporator, the liquid storage tank and the first expansion valve, and the compression refrigeration unit and the fluorine pump refrigeration unit are connected with the driving module through the evaporator and are used for exchanging heat with the driving module.

The PCS and the battery clusters are cooled by adopting the refrigerating and radiating units in two different modes, namely the compression refrigerating unit and the fluorine pump refrigerating unit, and the proper refrigerating mode can be selected according to different environment temperatures, so that the energy-saving and flexible and reliable effects are realized.

Specifically, the system further comprises a first pressure sensor for detecting the inlet pressure of the condenser, a first temperature sensor for detecting the temperature of the environment where the liquid cooling system is located, a second pressure sensor for detecting the inlet pressure of the fluorine pump, a third pressure sensor for detecting the outlet pressure of the fluorine pump, a fourth pressure sensor for detecting the back liquid port pressure of the driving module, a fifth pressure sensor for detecting the liquid supply port pressure of the driving module, a second temperature sensor for detecting the inlet liquid temperature of the battery cluster, and a temperature and humidity sensor for detecting the temperature and humidity of the environment where the battery cluster is located; the control system is electrically connected with the temperature and humidity sensor, the first pressure sensor, the first temperature sensor, the second pressure sensor, the third pressure sensor, the fourth pressure sensor, the second temperature sensor and the fifth pressure sensor.

The control system is electrically connected with the sensors, so that the real-time detection and accurate control of the liquid cooling system, the fluorine pump, the driving module, the battery cluster and the like by the control system are realized, and the operation efficiency and reliability of the system are improved.

Further, the device also comprises a dehumidifying unit, wherein the dehumidifying unit comprises a dehumidifying evaporator and a second fan; an inlet of the dehumidifying evaporator is connected between the second one-way valve and the first expansion valve, and an outlet of the dehumidifying evaporator is connected with an inlet of the compressor; the second fan is used for carrying out heat exchange between air of the installation environment of the battery cluster and the PCS and the dehumidifying evaporator through convection; the inlet of the dehumidifying evaporator is also provided with a second expansion valve, and the second expansion valve is used for independently controlling the evaporation pressure of the dehumidifying evaporator.

Through forced convection of the second fan, high-humidity air in the installation environment of the battery cluster and the PCS exchanges heat with the dehumidifying evaporator, and moisture in the high-humidity air is condensed and separated out under the heat absorption and evaporation of a refrigerant of the dehumidifying evaporator, so that the dehumidifying effect is realized.

Further, the dehumidifying unit further includes an air PTC heater for providing thermal compensation to the air sent out by the dehumidifying unit.

The air PTC heater carries out thermal compensation on dehumidified air, so that the temperature of ambient air entering a battery cluster and PCS is kept in a proper range, and the running stability and energy conservation of the energy storage container are effectively improved.

On the other hand, a control method of a temperature control system integrating a battery cluster of a fluorine pump and PCS parallel liquid cooling is provided, and the control method comprises the following steps of;

Compression refrigeration mode: when the ambient temperature of the liquid cooling system is higher than or equal to the preset highest ambient temperature, starting a compression refrigeration mode, namely stopping the operation of the fluorine pump, closing the third one-way valve, starting the second driving mechanism, starting the first fan, opening the first one-way valve and the second one-way valve, and starting the compressor;

Fluorine pump cooling mode: when the ambient temperature of the liquid cooling system is lower than the preset minimum ambient temperature, a fluorine pump refrigeration mode is started, namely the operation of the compressor is stopped, the first one-way valve and the second one-way valve are closed, a second driving mechanism is started, the first fan is started, a third one-way valve is opened, and the fluorine pump is started;

Hybrid cooling mode: when the ambient temperature of the liquid cooling system is between the preset minimum ambient temperature and the preset maximum ambient temperature, a mixed refrigeration mode is started, namely a second driving mechanism and the first fan are started, the first one-way valve, the second one-way valve and the third one-way valve are opened, and then the compressor and the fluorine pump are started;

dehumidification mode: when the control system detects that the ambient humidity in the battery cluster or the PCS is greater than the preset ambient humidity, judging the current running state of the compressor, if the compressor is not running currently, switching to a compression refrigeration mode or a mixed refrigeration mode, opening a second expansion valve, and starting the dehumidifying evaporator and the second fan to dehumidify.

Further, the control method further comprises a PCS liquid cooling device control mode:

When the temperature T of the built-in module of the PCS is more than or equal to the preset maximum proper temperature Tmax, the first driving mechanism is started, the temperature module arranged in the PCS transmits signals to the control box, and the control box adjusts the three-way valve to enable the three-way valve to flow to a channel of the first parallel branch to reach the preset maximum opening after receiving the signals;

When the temperature T of the PCS built-in module=the preset target temperature Ta+0.5 ℃, the opening degree of the first input port of the three-way valve is gradually reduced, and at the moment, the flow rate of the cooling liquid in the first parallel branch is reduced;

When the temperature T of the built-in module of the PCS is smaller than the preset minimum proper temperature Tmin and smaller than the preset maximum proper temperature Tmax, controlling the opening of the three-way valve to the first parallel branch according to a PID algorithm;

When the temperature T of the PCS built-in module is less than or equal to the preset minimum proper temperature Tmin, the channel of the three-way valve leading to the first parallel branch is closed, the channel of the three-way valve leading to the second parallel branch is fully opened, and the operation of the first driving mechanism is stopped.

Further, the control method further includes a heating operation mode: when the liquid supply temperature of the driving module is lower than the preset target temperature and the difference value is larger than the preset value, starting a heating operation mode, namely starting the PTC heater; wherein, PTC heater and second actuating mechanism interlock start.

Compared with the prior art, the invention has the beneficial effects that:

(1) According to the invention, the system is cooled by adopting a liquid cooling mode of the cooling liquid, the cooling liquid of the liquid cooling system can be directly connected with a trigger heat source, the cooling and refrigerating effects are more efficient, the temperature uniformity is better, and the service life of the battery can be prolonged.

(2) The invention integrates the functions of compression refrigeration, fluorine pump refrigeration and dehumidification, can be suitable for different environment temperatures and different heat dissipation requirements, improves the reliability and energy conservation of the system, and saves the installation space and the cost.

(3) The PCS and the battery clusters share the same liquid cooling system for heat dissipation and temperature reduction, so that the energy efficiency ratio is improved, the installation volume is saved, and the weight and the cost are reduced;

(4) The PCS liquid cooling device disclosed by the invention can maintain the PCS to operate at a proper working temperature by adjusting the temperature of the cooling liquid through the three-way valve, so that the energy-saving and high-efficiency effects are achieved, and meanwhile, potential safety hazards caused by condensation formed by the fact that the temperature of the PCS liquid supply is too low can be avoided.

Drawings

FIG. 1 is a circuit configuration diagram of embodiment 1 of the present invention;

FIG. 2 is a circuit diagram of embodiment 2 of the present invention;

Fig. 3 is a circuit configuration diagram of embodiment 3 of the present invention.

Reference numerals: 1-a compressor; 2-a first one-way valve; a 3-condenser; 4-a first fan; 5-a liquid storage tank; a 6-fluorine pump; 7-a second one-way valve; 8-a first expansion valve; 9-an evaporator; 10-a third one-way valve; 11-a second drive mechanism; 12-PTC heater; 13-a three-way valve; 14-battery clusters; 15-an expansion tank; a 16-heat exchanger; 17-a first drive mechanism; 18-PCS; 19-a second expansion valve; 20-a dehumidifying evaporator; 21-a second fan; 22-air PTC heater; 23-a first pressure sensor; 24-a first temperature sensor; 25-a second pressure sensor; 26-a third pressure sensor; 27-a fourth pressure sensor; 28-a second temperature sensor; 29-a fifth pressure sensor; 30-control box.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention. For better illustration of the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, the embodiment provides a temperature control system for parallel liquid cooling of a battery cluster and a PCS of an integrated fluorine pump, which comprises a control system, and a compression refrigeration unit, a fluorine pump refrigeration unit, a driving module, a battery cluster 14, a PCS18 and a PCS liquid cooling module which are all connected with the control system; the PCS liquid cooling module is connected with the PCS18 and is used for carrying out heat exchange on the PCS; the driving module comprises a first parallel branch connected with the PCS liquid cooling module and a second parallel branch connected with the battery cluster 14, wherein the first parallel branch is used for carrying out heat exchange on the PCS liquid cooling module, and the second parallel branch is used for carrying out heat exchange on the battery cluster 14; the compression refrigeration unit and the fluorine pump refrigeration unit are connected with the driving module and used for carrying out heat exchange with the driving module.

In the specific implementation process, part of the cooling liquid in the driving module pipeline is split into a first parallel branch so as to take out the heat of the PCS liquid cooling module, and the other part of the cooling liquid is split into a second parallel branch so as to take out the heat of the battery cluster 14, and after the cooling liquid of the two branches is collected, the cooling liquid is subjected to unified heat dissipation and cooling treatment through a compression refrigerating unit or a fluorine pump refrigerating unit. The PCS18 and the battery cluster 14 share one refrigeration module for heat dissipation and temperature reduction, so that compared with a plurality of sets of liquid cooling systems, the occupied volume and the manufacturing cost are reduced, and the energy efficiency ratio of the liquid cooling system is improved.

In this embodiment, as shown in fig. 1, the PCS liquid cooling module includes a heat exchanger 16 and a first driving mechanism 17. The heat exchanger 16, the first driving mechanism 17 and the PCS18 are sequentially connected through a pipeline to form a PCS liquid cooling circulation loop, the heat exchanger 16 is connected with the driving module to form a first parallel branch for heat exchange with the driving module, and the first driving mechanism 17 is used for driving cooling liquid in the PCS liquid cooling circulation loop to circulate.

The cooling liquid in the PCS liquid cooling module absorbs heat of the PCS18, flows through the heat exchanger 16 under the drive of the first driving mechanism 17, exchanges heat with liquid in the driving module through the heat exchanger 16, and flows into the first driving mechanism 17 after being cooled, so that cooling liquid circulation of the PCS liquid cooling module is completed.

In this embodiment, the drive module comprises a second drive mechanism 11 and a three-way valve 13. The three-way valve 13 may be provided on the liquid supply main pipe of the first parallel branch and the second parallel branch as a split three-way valve, or may be provided on the liquid return main pipe of the first parallel branch and the second parallel branch as a two-branch converging three-way valve. Specifically, when the three-way valve 13 is used as a shunt three-way valve for shunting the coolant of the driving module to the first parallel branch and the second parallel branch, the first output port of the three-way valve 13 is connected with the input end of the first parallel branch, the second output port of the three-way valve 13 is connected with the input end of the second parallel branch, and the output end of the first parallel branch and the output end of the second parallel branch are collected and then connected with the input port of the second driving mechanism 11. When the three-way valve 13 is used as a converging three-way valve for converging the cooling liquid of the first parallel branch and the second parallel branch, the first input port of the three-way valve 13 is connected with the output end of the first parallel branch, the second input port of the three-way valve 13 is connected with the output end of the second parallel branch, and the output port of the three-way valve is connected with the input port of the second driving mechanism 11.

In a specific implementation, the second driving mechanism 11 and the first driving mechanism 17 may be implemented by a water pump or the like.

In practical applications, the battery cluster 14 generally includes a plurality of parallel-connected battery packs, and the plurality of parallel-connected battery packs are connected in parallel and then connected to a second parallel branch, and the cooling liquid in the second parallel branch drives the second driving mechanism 11 to carry out heat of the battery cluster 14. The cooling liquid in the second parallel branch is split to the branches of each battery pack in the battery cluster 14 to cool each battery pack, and is collected again after heat exchange is completed, and is collected again with the cooling liquid of the first parallel branch, so that the cooling liquid circulation of the driving module is completed.

In specific use, the three-way valve 13 can be adjusted to flexibly distribute or combine the flow rates of the cooling liquid in the first parallel branch and the second parallel branch. As an example of this embodiment, when the three-way valve 13 is used as the shunt three-way valve, since the operating temperature ranges of the battery cluster 14 and the PCS18 are different greatly, the battery cluster 14 is suitable for operating at a relatively low temperature, and the PCS18 needs to operate at a relatively high temperature, the opening of the three-way valve 13 may be adjusted so that the first parallel branch obtains less cooling liquid, and most of the cooling liquid is distributed to the second parallel branch, so that reasonable distribution of the cooling liquid flow in the driving module is achieved, and the operating temperature requirements of different heat dissipation objects are satisfied.

In some cases, even if most of the cooling liquid is distributed to the second parallel branch, the heat dissipation requirement of the battery cluster 14 may not be met, and at this time, the three-way valve 13 may be further adjusted, so that the cooling liquid in the driving module flows to the second parallel branch completely, and thus the battery cluster 14 is fully dissipated. Although the failure of the first parallel branch to obtain a distribution of coolant may have some effect on the operating temperature of the PCS18, such effect may be acceptable over a period of time due to its relatively high operating temperature range. After the temperature of the battery cluster 14 is reduced to the target temperature, part of cooling liquid in the driving module is shunted to the first parallel branch through the three-way valve 13, so that cooling and heat dissipation are carried out for the PCS liquid cooling module, and reasonable distribution of cooling liquid flow in the driving module is realized.

In order to achieve a warming up of the cooling liquid in the drive module, the drive module further comprises a PTC heater 12. Specifically, the PTC heater 12 is disposed in a pipe connected to the output port of the second driving mechanism 11, and is mainly used to heat the coolant in the driving circulation loop when the temperature of the liquid in the driving circulation loop is too low, so as to prevent the operation performance of the PCS18 and the battery cluster 14 from being affected by the too low temperature of the coolant. Of course, the PTC heater 12 may be provided in the main line connected to the input port of the second driving mechanism 11.

In addition, an expansion tank 15 is arranged in the line connected to the inlet of the second drive 11, the expansion tank 15 being mainly used for stabilizing the pressure of the cooling liquid driving the circulation circuit.

The refrigerating module of the embodiment comprises a compression refrigerating unit and a fluorine pump refrigerating unit, and the compression refrigerating unit and the fluorine pump refrigerating unit are connected with the driving module and used for performing heat exchange with the driving module.

Specifically, the compression refrigeration unit comprises an 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 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 sequentially connected to form a compression refrigeration cycle, and the compression refrigeration unit exchanges heat with the driving module through the evaporator 9.

The fluorine pump refrigerating unit comprises a third one-way valve 10 and a fluorine pump 6; the 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 are sequentially connected to form a fluorine pump refrigeration cycle, and the fluorine pump refrigeration unit exchanges heat with the driving module through the evaporator 9.

The system of this embodiment is further provided with a first fan 4, where the first fan 4 is used to accelerate the air flow on the surface of the condenser 3 by forced convection, and as the air flow generated by the first fan 4 continuously blows across the condenser 3, the heat on the condenser 3 is rapidly taken away and discharged to the outdoor environment, so that the effective dissipation of the heat of the whole system is realized. In practical applications, the first fan 4 may be disposed near the condenser 3, for example, behind the condenser 3, and the specific location may be determined according to practical situations, which are only exemplified herein.

Through setting up compression refrigeration unit and fluorine pump refrigeration unit, refrigeration module has two kinds of different refrigeration modes of compression refrigeration mode and fluorine pump refrigeration mode for the system can adapt to different ambient temperature and heat dissipation demand in a flexible way, thereby has improved the accuracy of accuse temperature and refrigerated energy efficiency. Meanwhile, the compression refrigeration unit and the fluorine pump refrigeration unit share part of pipelines, such as a shared condenser 3, a first fan 4, a liquid storage tank 5, a first expansion valve 8, an evaporator 9 and the like, so that occupied space and manufacturing cost are saved. More specifically, the compression refrigeration unit and the fluorine pump refrigeration unit are connected with a pipeline between the PTC heater of the driving module and the input port of the three-way valve through the evaporator 9, so that heat exchange is isolated from the cooling liquid in the driving module through the evaporator 9.

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.

In some embodiments, the compression refrigeration unit may use an air-cooled variable-frequency direct expansion refrigeration system, and when the ambient temperature is greater than a preset switching temperature, the compression refrigeration mode is started, so as to ensure that at least one branch works in the same period. During operation, the cooling liquid of the driving module absorbs heat of the battery cluster 14 and the PCS18, the heat of the cooling liquid is transferred to the refrigerant in the evaporator 9 through the evaporator 9, the refrigerant in the evaporator 9 absorbs heat and evaporates and returns to the compressor 1, the compressor 1 compresses low-temperature low-pressure gas into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the condenser 3 through the first one-way valve 2 and then the condenser 3 through forced convection of the first fan 4, the heat is emitted to the outdoor environment, and therefore the high-temperature high-pressure gas is condensed into medium-temperature high-pressure liquid, the medium-temperature high-pressure liquid enters the first expansion valve 8 through the liquid storage tank 5 and the second one-way valve 7 and is throttled and depressurized to be mixed with low-temperature low-pressure gas, and then the low-temperature low-pressure gas is absorbed and evaporated through the evaporator 9, and thus the compressed refrigeration closed cycle is formed.

In this embodiment, the fluorine pump refrigeration mode mainly uses the latent heat of refrigerant phase change to take away the heat of the battery cluster 14 and the PCS18, and the compressor 1 is not required to be started when the fluorine pump refrigeration mode is used, so that the fluorine pump refrigeration mode is more efficient and energy-saving compared with the compression refrigeration mode, and is suitable for low-temperature climates. When the ambient temperature is less than or equal to the preset switching temperature, the fluorine pump refrigeration mode is started, the compression refrigeration mode is closed, and at least one branch is ensured to work in the same period. When the fluorine pump refrigerating mode is started, a refrigerant in the refrigerating system is pumped into the first expansion valve 8 by the running fluorine pump 6, a low-temperature low-pressure gas-liquid mixture is formed after the refrigerant is throttled and depressurized by the first expansion valve 8, the gas-liquid mixture enters the evaporator 9 to be isolated and heat exchanged with cooling liquid of a driving module which absorbs heat of the battery cluster 14 and PCS18, the refrigerant enters the condenser 3 through the third one-way valve 10 after absorbing heat and evaporating, the heat of the system is emitted to the outdoor environment through forced convection of the first fan 4, a medium-temperature high-pressure refrigerant liquid is formed, the medium-temperature high-pressure refrigerant liquid is pumped into the first expansion valve 8 through the fluorine pump 6 to be throttled and depressurized to form a low-temperature low-pressure gas-liquid mixture, and the gas-liquid mixture returns to the evaporator 9, and thus the fluorine pump refrigerating closed cycle is formed. The refrigerating system adopts the design of compression refrigeration and fluorine pump refrigeration integration, can open different refrigeration modes according to different ambient temperatures and heat dissipation demands during the use for the refrigerating system of this embodiment is more energy-efficient, has promoted system low temperature starting performance, has strengthened environmental suitability, more helps prolonging the life of compressor 1 and battery.

Specifically, the control system includes a control box 30, a first pressure sensor 23, a second pressure sensor 25, a third pressure sensor 26, a fourth pressure sensor 27, a fifth pressure sensor 29, a first temperature sensor 24, a second temperature sensor 28, and a temperature and humidity sensor (not shown in the figure);

The first pressure sensor 23 is arranged at the inlet of the condenser 3 and is used for collecting the inlet pressure of the condenser 3;

the second pressure sensor 25 and the third pressure sensor 26 are respectively arranged at the inlet and the outlet of the fluorine pump 6 and are used for collecting the pressure at the inlet and the outlet of the fluorine pump 6;

The fourth pressure sensor 27 and the fifth pressure sensor 29 are respectively arranged in the initial pipelines of the first parallel branch and the second parallel branch and are used for collecting the hydraulic pressure returned and the hydraulic pressure supplied by the driving module;

The first temperature sensor 24 is disposed in the environments of the compression refrigeration unit and the fluorine pump refrigeration unit, and is configured to collect the ambient temperatures of the environments of the compression refrigeration unit and the fluorine pump refrigeration unit;

The second temperature sensor 28 is disposed in the initial pipeline of the first parallel branch and the second parallel branch, and is configured to collect the liquid supply temperature of the driving module;

the temperature and humidity sensor (not shown in the figure) is disposed in the environment where the battery cluster 14 is located, and is configured to collect the temperature and humidity of the environment where the battery cluster 14 is located;

The control box 30 includes a controller (not shown) and a variable frequency drive (not shown);

The controller (not shown) is electrically connected to the temperature and humidity sensor (not shown), the first pressure sensor 23, the first temperature sensor 24, the second pressure sensor 25, the third pressure sensor 26, the fourth pressure sensor 27, the second temperature sensor 28, and the fifth pressure sensor 29.

In the embodiment, the heat of the battery cluster 14 and the PCS18 is brought out through the driving module, and the heat brought out by the driving module is subjected to centralized and unified heat dissipation and cooling treatment through the compression refrigerating unit and the fluorine pump refrigerating unit, so that the integrated cooling problem is solved, and the energy consumption and the occupied space of the system are saved.

Example 2

As shown in fig. 2, this embodiment is further improved on the basis of embodiment 1 in that: the compression refrigeration unit draws a branch as a dehumidification unit for controlling the air humidity of the associated components and circuits, such as the battery pack 14 and PCS 18. The dehumidification unit is used for controlling the air humidity of the battery cluster 14, PCS18 and related electrical elements and circuits in the energy storage container, so that the safety and reliability of the whole energy storage system are improved.

Wherein the dehumidifying unit includes a dehumidifying evaporator 20 and a second fan 21; an inlet of the dehumidifying evaporator 20 is connected between the second check valve 7 and the first expansion valve 8, and an outlet of the dehumidifying evaporator 20 is connected with an inlet of the compressor 1; the second fan 21 is used to convect air in the storage container in which the battery cluster 14 and PCS18 are installed into heat exchange relationship with the dehumidification evaporator 20. The inlet of the dehumidification unit is also provided with a second expansion valve 19, the second expansion valve 19 being used for independently controlling the evaporation pressure of the dehumidification evaporator 20. When dehumidification is needed, the system is switched to a compression refrigeration mode or a mixed refrigeration mode preferentially, forced convection is carried out through the second fan 21, so that high-humidity air in the energy storage container exchanges heat with the dehumidification evaporator 20, moisture carried by the high-humidity air condenses and separates out under the heat absorption and evaporation of a refrigerant of the dehumidification evaporator 20, and low-temperature low-humidity air after heat exchange is sent into the battery cluster 14 and the PCS18, and therefore the dehumidification function of the system is achieved.

The integrated compression refrigeration dehumidification system is utilized to realize refrigeration and dehumidification functions, so that the influence of humid air on electric elements and electronic circuits of the energy storage container can be reduced, the running stability of the energy storage system is improved, certain space and cost are saved, and the installation, the operation and the maintenance are convenient.

In practical application, a temperature and humidity sensor (not shown in the figure) can be installed in the container and at the air supply outlet of the dehumidification unit for collecting the ambient temperature and humidity in the container. When the humidity in the container is higher, the control system firstly detects the current running state of the compressor 1, and if the system is in the fluorine pump refrigeration mode, the system exits the mode and is ready to be switched to the compression refrigeration mode or the mixed refrigeration mode. If the system is already in compression refrigeration or mixed refrigeration mode, the compressor 1 is kept running and enters into dehumidification mode. At this time, the control system calculates the operation frequency of the compressor 1 according to the cooling requirements of the cooling liquid supply side and the dehumidification air supply side in the driving module. If the calculated frequency is higher than the current running frequency, the compressor 1 is loaded in an ascending frequency mode, and the loading upper limit is the maximum allowable rotating speed of the compressor 1; otherwise, the load is reduced by frequency reduction, and the lower limit of the load reduction is the minimum allowable rotation speed of the compressor 1. In addition, the air supply humidity of the dehumidification system can be realized by adjusting the rotating speed of the second fan 21, and when the air supply humidity is higher than a set target, the control system controls the rotating speed of the second fan 21 to be reduced so as to reduce the air quantity; when the air supply humidity is lower than the set target, the rotation speed of the second fan 21 is increased to increase the air quantity. The air supply humidity and air supply temperature can be sensed by a temperature and humidity sensor (not shown) installed at the air supply outlet of the dehumidifying unit and transmitted to the control system. In practical application, the heating operation duration is generally shorter, if the liquid system is in the heating mode currently, the liquid supply temperature is waited to reach the set target and then exits the heating mode, and then the liquid supply temperature is switched to the dehumidification mode according to the requirements.

The integrated compression refrigeration dehumidification system is utilized to realize refrigeration and dehumidification functions, the influence of humid air on electric elements and electronic circuits of the energy storage container can be reduced, the running stability of the energy storage system is improved, certain space and running cost are saved, and the system is convenient to install and daily operate and maintain.

Example 3

As shown in fig. 3, this embodiment is based on embodiment 2 in which an air PTC heater 22 is superimposed on a dehumidification evaporator 20. When the temperature of the air after heat exchange with the dehumidifying evaporator 20 is too low, the working performance of the battery clusters 14 and the PCS18 is reduced by the low-temperature air, and at this time, the low-temperature low-humidity air after heat exchange with the dehumidifying evaporator 20 can be thermally compensated by the air PTC heater 22, so that the temperature and humidity of the air fed into the battery clusters 14 and the PCS18 are further controlled, and the battery clusters 14 and the PCS18 can be maintained to work efficiently in a proper temperature range. The present embodiment can control whether to turn on the air PTC heater 22 for thermal compensation according to the temperature and humidity of the air in the battery cluster 14 and the PCS 18. When the air supply temperature needs to be increased, the heating amount of the air PTC heater 22 is started and adjusted to meet the requirement of the target air supply temperature; if the air supply temperature does not need to be increased, the air PTC heater 22 is turned off, so that the operation reliability and the operation performance of the energy storage container are further improved, and the energy efficiency of the energy storage system is optimized.

In this embodiment, the dehumidifying evaporator 20 is arranged to dehumidify the environment where the battery cluster 14 and the PCS18 are located, and the air PTC heater 22 is used to perform thermal compensation on the dehumidified air, so that the dehumidifying unit can flexibly adjust the supply air temperature, thereby meeting the temperature and humidity requirements inside the container, and simultaneously preventing the temperature of the environment where the battery cluster 14 and the PCS18 are located from being too low due to the too low supply air temperature inside the energy storage container, and affecting the normal operation of the battery cluster 14 and the PCS 18.

Example 4

The embodiment provides a control method of a temperature control system integrating a battery cluster of a fluorine pump and PCS parallel liquid cooling, which is realized by adopting the liquid cooling system in embodiment 1.

The control method of the present embodiment includes a cooling mode. And when the liquid supply temperature of the driving module is higher than the preset target temperature and the difference value is larger than the preset value, starting a refrigeration mode. Wherein the cooling mode includes a compression cooling mode, a fluorine pump cooling mode, and a hybrid cooling mode.

Compression refrigeration mode: when the ambient temperature of the liquid cooling system is higher than or equal to the preset highest ambient temperature, starting a compression refrigeration mode, namely stopping the operation of the fluorine pump 6, closing the third one-way valve 10, starting the second driving mechanism 11, starting the first fan 4, opening the first one-way valve 2 and the second one-way valve 7, and starting the compressor 1;

Fluorine pump cooling mode: when the ambient temperature of the liquid cooling system is lower than the preset minimum ambient temperature, a fluorine pump refrigeration mode is started, namely the operation of the compressor 1 is stopped, the first one-way valve 2 and the second one-way valve 7 are closed, the second driving mechanism 11 is started, the first fan 4 is started, the third one-way valve 10 is opened, and the fluorine pump 6 is started;

Hybrid cooling mode: when the ambient temperature of the liquid cooling system is between the preset minimum ambient temperature and the preset maximum ambient temperature, starting a mixed refrigeration mode, namely starting a second driving mechanism 11 and the first fan 4, opening the first one-way valve 2, the second one-way valve 7 and the third one-way valve 10, and then starting the compressor 1 and the fluorine pump 6, wherein the compressor 1 is started at the current frequency or at the preset frequency;

The control method of the present embodiment further includes a heating operation mode. When the cooling mode is turned on, the heating operation mode is turned off, that is, the operation of the PTC heater 12 is stopped, and then the cooling mode is turned on. Similarly, when the cooling mode is turned on, the heating mode is turned on after the cooling mode is turned off.

Heating operation mode: when the liquid supply temperature of the driving module is lower than the preset target temperature and the difference value is larger than the preset value, the refrigerating mode is closed, and the heating operation mode is started, namely the PTC heater 12 is started; wherein the PTC heater 12 is interlocked with the second driving mechanism 11.

In practical application, the control system can be automatically switched to a corresponding refrigeration mode according to the actual operation requirement. For example, the preset minimum ambient temperature in this embodiment is 5 ℃, and the preset maximum ambient temperature is 15 ℃.

When the environmental temperature of the liquid cooling system is more than or equal to 15 ℃, a compression refrigeration mode is started, and all cold energy of the cooling liquid in the driving module is provided by the compression refrigeration unit. In the compression refrigeration mode of the present embodiment, the rotation speed of the first fan 4 is adjusted according to the pressure value acquired by the first pressure sensor 23. When the pressure detected by the first pressure sensor 23 is higher than a set value, the rotating speed of the first fan 4 is correspondingly increased until the maximum allowable rotating speed is reached, and the rotating speed is kept unchanged; conversely, when the pressure is lower than the set value, the rotation speed is reduced, and if the pressure is still lower than the set value after the rotation speed is reduced to the lowest allowable rotation speed, the operation of the first fan 4 is stopped. The compressor 1 is controlled by frequency conversion to maintain the temperature of the liquid supplied to the drive module within a target range, and may be set to 18 to 20 ℃. When the temperature of the liquid supply in the driving module is within + -0.5 ℃ of the target temperature, the system is in a thermal equilibrium state, and the frequency of the compressor 1 is not regulated. If the liquid supply temperature exceeds the target temperature +0.5deg.C, the compressor 1 will perform frequency raising operation according to the preset frequency change requirement until the liquid supply temperature falls again to within +0.5deg.C of the target temperature. Conversely, if the feed temperature is lower than the target temperature of-0.5 ℃, the compressor 1 will perform the frequency-reducing operation to reduce the refrigerating capacity.

When the environment temperature of the liquid cooling system is between 5 and 15 ℃, the compression refrigeration mode and the fluorine pump refrigeration mode are both started to operate. If the liquid supply temperature in the driving module is higher than expected, the operation frequency of the compressor 1 can be increased and the rotating speed of the first fan 4 can be increased so as to ensure that the liquid supply temperature reaches the set requirement. If the temperature of the feed liquid in the drive module is low, the operating frequency of the compressor 1 should be preferentially reduced. While continuing to monitor the feed liquid temperature in the drive module, if the compressor 1 frequency has fallen to its minimum allowable range, but the feed liquid temperature in the drive module still does not meet the requirements, the compressor 1 should be stopped and switched to the fluorine pump cooling mode. If the temperature of the liquid supply in the driving module is still lower, the rotation speed of the first fan 4 is gradually reduced until the temperature of the liquid supply in the driving module reaches the required range. In the variable frequency adjustment process of the fluorine pump 6, the deviation between the inlet and outlet pressure difference and the set target lift (such as 2bar, which can be set according to actual conditions) of the mixed refrigeration mode is used as a control basis. Specifically, when the inlet-outlet pressure difference of the fluorine pump 6 is higher than the target value, the operating frequency of the fluorine pump 6 is appropriately reduced; if the pressure difference between the inlet and the outlet is lower, the operating frequency of the fluorine pump 6 is increased so as to ensure the stable operation of the system and meet the refrigeration requirement.

When the ambient temperature of the liquid cooling system is less than or equal to 5 ℃, the fluorine pump refrigeration mode is started to operate. When the operation mode is switched to the fluorine pump refrigeration mode, the fluorine pump 6 is started to operate and enters frequency adjustment after a certain time is passed after the operation is performed according to a preset frequency, for example, the preset frequency can be set to 40%, and a deviation value between an inlet and outlet pressure difference value of the fluorine pump 6 and a target lift (for example, 4bar, which can be set according to actual conditions) set in the fluorine pump 6 refrigeration mode is detected as a control basis for the frequency adjustment. Specifically, when the inlet-outlet pressure difference of the fluorine pump 6 is higher than the target value, the operating frequency of the fluorine pump 6 is properly reduced, and the lower limit of the reduction is the lowest allowable frequency of the fluorine pump 6; if the inlet-outlet pressure difference is lower, the operating frequency of the fluorine pump 6 is increased, and the upper limit is the highest operating frequency allowed by the fluorine pump 6. After the refrigerating mode of the fluorine pump 6 is started, if the temperature of the liquid supply in the driving module is too high, the rotating speed of the first fan 4 can be increased; otherwise, the rotation speed of the first fan 4 is reduced.

The second driving mechanism 11 is frequency conversion control, and the basis of the frequency conversion adjustment of the second driving mechanism 11 is the deviation value of the feedback hydraulic pressure difference and the set target pressure difference in the driving module. When the supply-back hydraulic pressure difference is higher than the set target, the control system decreases the operating frequency of the second drive mechanism 11 to decrease the output pressure. During the adjustment, the operating frequency of the second drive mechanism 11 is not lower than its lowest permissible frequency. When the liquid supply-back pressure difference is lower than the set target, the operating frequency of the second driving mechanism 11 is increased, and in the adjusting process, the operating frequency of the second driving mechanism 11 is not lower than the lowest allowable frequency, and meanwhile, the operating frequency of the second driving mechanism 11 is ensured not to exceed the highest allowable frequency, so that the stable operation of equipment is ensured, and the service life is prolonged.

The control method of the embodiment further includes a control mode of the PCS liquid cooling device, and a temperature module is arranged in the PCS18 to monitor the temperature of the PCS, so as to determine whether the cooling liquid in the PCS liquid cooling device needs to be circulated to cool the PCS 18.

As a specific example, the suitable target temperature Ta of PCS18 is set to 70 ℃, and the suitable operating temperature range of PCS18 is set to Tmin to Tmax, where tmin=60, tmax=80. The temperature module transmits the collected PCS temperature parameter to a control box, and the control box controls the opening degree of the three-way valve 13 and the rotating speed of the first driving mechanism 17 according to the PCS temperature parameter.

The PCS liquid cooling device control mode specifically comprises the following steps: when the temperature T of the built-in module of the PCS18 is more than or equal to Tmax, the first driving mechanism 17 is started, a temperature module arranged in the PCS18 transmits signals to the control box 30, and the control box receives the signals and then adjusts the three-way valve 13 to enable the three-way valve 13 to flow to a channel of the first parallel branch to reach the maximum preset opening degree, so that cooling liquid in the first parallel branch and cooling liquid of the PCS liquid cooling module are subjected to full heat exchange through the second heat exchanger.

When the PCS built-in module temperature t=ta+0.5 ℃, the first input port opening degree of the three-way valve 13 gradually decreases, and at this time, the coolant flow in the first parallel branch decreases. When the temperature T of the built-in module of the PCS18 is min < T < Tmax, the opening degree of the three-way valve 13 to the first parallel branch is controlled according to a PID algorithm. The PID algorithm can calculate and adjust the opening degree of the valve in real time so as to maintain the PCS18 temperature within a set range and realize efficient and stable temperature control.

When the temperature T of the PCS built-in module is less than or equal to Tmin, the channel of the three-way valve 13 to the first parallel branch is closed, the channel of the three-way valve 13 to the second parallel branch is fully opened, and the operation of the first driving mechanism 17 is stopped. At this time, the first parallel branch is in the off state.

The control method of the temperature control system for parallel liquid cooling of the battery cluster and the PCS of the integrated fluorine pump is realized by adopting the liquid cooling systems described in the embodiment 2 and the embodiment 3, and further comprises a dehumidification mode. When the control system detects that the ambient humidity within the battery cluster 14 or the PCS18 is greater than a preset ambient humidity, a dehumidification mode may be initiated to dehumidify.

The dehumidification mode specifically comprises the following steps:

s2: judging whether the driving module is in a heating operation mode currently, if so, exiting the heating operation mode after the liquid supply temperature of the driving module reaches or exceeds the preset liquid supply temperature;

s4: judging the current running state of the compressor 1, and switching to a compression refrigeration mode or a mixed refrigeration mode if the compressor 1 is not running currently;

s6: the dehumidifying evaporator 20 and the second fan 21 are started to dehumidify.

In practical application, when the dehumidification mode is started, the control system calculates the cooling requirement of the cooling liquid supply side and the cooling requirement of the dehumidification air supply side in the driving module, and calculates and evaluates the proper operating frequency of the compressor 1 based on the two requirements. When the calculated operation frequency is higher than the current operation frequency of the compressor 1, the compressor 1 is controlled to perform frequency-up loading to improve the refrigeration efficiency, and the loading upper limit is the maximum allowable rotation speed of the compressor 1. Conversely, if the calculated operating frequency is lower than the current operating frequency of the compressor 1, the compressor 1 is controlled to perform the down-conversion load shedding, and the lower limit of the load shedding is the minimum allowable rotation speed of the compressor 1.

In addition, a temperature and humidity sensor (not shown) is provided at the air supply outlet of the dehumidification unit for detecting the air supply humidity and air supply temperature of the dehumidification unit. The temperature and humidity sensor (not shown) transmits the detected air supply temperature and the detected air supply temperature to the control box, and the control box adjusts the transmission of the second fan according to the air supply temperature and the air supply humidity. Specifically, the rotational speed of the second fan 21 is decreased to decrease the air volume when the supply air humidity is higher than the set target value, and the rotational speed of the second fan 21 is increased to increase the air volume when the supply air humidity is lower than the set target value.

In some alternative embodiments, the dehumidification vaporizer 20 is superimposed with air PTC electrical heating for thermally compensating the dehumidification vaporizer 20. In the implementation process, after step S6 is performed, whether to turn on the air PTC heater 22 for thermal compensation may be controlled according to the temperature and humidity of the air in the installation environments of the battery clusters 14 and the PCS 18. For example, when it is desired to raise the supply air temperature, the air PTC heater 22 may be turned on and the amount of heating thereof adjusted to meet the desired target supply air temperature requirement. If the current supply air temperature has met the requirements, the air PTC heater 22 is turned off for energy saving purposes.

It should be understood that the foregoing examples of the present invention are merely illustrative of the present invention and are not intended to limit the present invention to the specific embodiments thereof. Any modification, equivalent replacement, improvement, etc. that comes within the spirit and principle of the claims of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The temperature control system integrating the parallel liquid cooling of the battery cluster of the fluorine pump and the PCS is characterized by comprising a control system, and a compression refrigeration unit, a fluorine pump refrigeration unit, a driving module, a battery cluster, a PCS and a PCS liquid cooling module which are all connected with the control system; the PCS liquid cooling module is connected with the PCS and is used for carrying out heat exchange on the PCS; the driving module comprises a first parallel branch connected with the PCS liquid cooling module and a second parallel branch connected with the battery cluster, wherein the first parallel branch is used for carrying out heat exchange on the PCS liquid cooling module, and the second parallel branch is used for carrying out heat exchange on the battery cluster; the compression refrigeration unit and the fluorine pump refrigeration unit are connected with the driving module and used for carrying out heat exchange with the driving module.

2. The temperature control system for cooling a battery cluster integrated with a fluorine pump and a PCS in parallel according to claim 1, wherein the PCS liquid cooling module comprises a heat exchanger and a first driving mechanism; the heat exchanger, the first driving mechanism and the PCS are sequentially connected to form a PCS liquid cooling circulation loop; the heat exchanger is connected with the driving module to form a first parallel branch circuit for performing heat exchange with the driving module, and the first driving mechanism is used for driving liquid in the PCS liquid cooling circulation loop to circulate.

3. The temperature control system for parallel liquid cooling of a battery cluster and a PCS of an integrated fluorine pump according to claim 2, wherein the driving module comprises a second driving mechanism, a PTC heater and a three-way valve, a first output port of the three-way valve is connected with an input end of the first parallel branch, a second output port of the three-way valve is connected with an input end of the second parallel branch, an output end of the first parallel branch and an output end of the second parallel branch are converged and then are connected with an input port of the second driving mechanism, an output port of the second driving mechanism is connected with the PTC heater, and the compression refrigeration unit and the fluorine pump refrigeration unit are connected between the PTC heater and the input port of the three-way valve.

4. The temperature control system for parallel liquid cooling of a battery cluster and a PCS of an integrated fluorine pump according to claim 3, wherein the compression refrigeration unit comprises a compressor, a first one-way valve, a condenser, a liquid storage tank, a second one-way valve, a first expansion valve and an evaporator which are sequentially connected through pipelines to form a compression refrigeration cycle;

The fluorine pump refrigerating unit comprises a third one-way valve, a condenser, a liquid storage tank, a fluorine pump, a first expansion valve and an evaporator which are sequentially connected through pipelines to form a fluorine pump refrigerating circulation loop;

The system also comprises a first fan, wherein the first fan is used for blowing and radiating heat to the condenser; the compression refrigeration cycle loop and the fluorine pump refrigeration cycle loop share the condenser, the evaporator, the liquid storage tank and the first expansion valve, and the compression refrigeration unit and the fluorine pump refrigeration unit are connected with the driving module through the evaporator and are used for exchanging heat with the driving module.

5. The temperature control system of a parallel liquid cooling of a battery cluster and a PCS of an integrated fluorine pump according to claim 4, further comprising a first pressure sensor for detecting an inlet pressure of the condenser, a first temperature sensor for detecting an ambient temperature in which the liquid cooling system is located, a second pressure sensor for detecting an inlet pressure of the fluorine pump, a third pressure sensor for detecting an outlet pressure of the fluorine pump, a fourth pressure sensor for detecting a return pressure of the drive module, a fifth pressure sensor for detecting a supply pressure of the drive module, a second temperature sensor for detecting an inlet liquid temperature of the battery cluster, and a temperature and humidity sensor for detecting a temperature and humidity of an environment in which the battery cluster is located;

The control system is electrically connected with the temperature and humidity sensor, the first pressure sensor, the first temperature sensor, the second pressure sensor, the third pressure sensor, the fourth pressure sensor, the second temperature sensor and the fifth pressure sensor.

6. The temperature control system of a parallel liquid cooling of a battery cluster and a PCS of an integrated fluorine pump of claim 5, further comprising a dehumidification unit comprising a dehumidification evaporator and a second fan; an inlet of the dehumidifying evaporator is connected between the second one-way valve and the first expansion valve, and an outlet of the dehumidifying evaporator is connected with an inlet of the compressor; the second fan is used for carrying out heat exchange between air of the installation environment of the battery cluster and the PCS and the dehumidifying evaporator through convection; the inlet of the dehumidifying evaporator is also provided with a second expansion valve, and the second expansion valve is used for independently controlling the evaporation pressure of the dehumidifying evaporator.

7. The system of any of claims 1-6, wherein the dehumidification unit further comprises an air PTC heater for providing thermal compensation to air delivered by the dehumidification unit.

8. A control method for a temperature control system for parallel liquid cooling of a battery cluster and a PCS of an integrated fluorine pump in accordance with claim 7, said control method comprising:

Dehumidification mode: when the control system detects that the ambient humidity in the battery cluster or the PCS is greater than the preset ambient humidity, judging the current running state of the compressor, if the compressor is not running currently, switching to a compression refrigeration mode or a mixed refrigeration mode, then opening a second expansion valve, and starting the dehumidifying evaporator and the second fan to dehumidify.

9. The control method of claim 8, further comprising a PCS liquid cooling device control mode:

When the temperature T of the built-in module of the PCS is more than or equal to the preset maximum proper temperature Tmax, the first driving mechanism is started, and the three-way valve is regulated to enable the three-way valve to flow to the channel of the first parallel branch to reach the preset maximum opening;

10. The control method according to claim 8 or 9, characterized by further comprising a heating operation mode: when the liquid supply temperature of the driving module is lower than the preset target temperature and the difference value is larger than the preset value, starting a heating operation mode, namely starting the PTC heater; wherein, PTC heater and second actuating mechanism interlock start.