Double-cold-source energy storage liquid cooling system and liquid cooling control method

Abstract

The invention relates to the technical field of energy storage liquid cooling, in particular to a double-cold-source energy storage liquid cooling system and a liquid cooling control method.The double-cold-source energy storage liquid cooling system comprises a compressor liquid cooling system, a heat pipe liquid cooling system, a plate heat exchanger, a temperature monitoring module and a control valve bank.The plate heat exchanger is provided with a waterway pipeline, a first liquid cooling pipeline and a second liquid cooling pipeline; the waterway pipeline is used for circulating cooling water, the first liquid cooling pipeline is communicated with the compressor liquid cooling system, the second liquid cooling pipeline is communicated with the heat pipe liquid cooling system, and the temperature monitoring modules are respectively arranged on pipeline loops of the waterway loop, the compressor liquid cooling system and the heat pipe liquid cooling system. The temperature monitoring module is used for acquiring the internal environment temperature and the cooling water temperature of the energy storage unit in real time, the control valve group is arranged on a water path loop, a compressor liquid cooling system and a pipeline loop of a heat pipe liquid cooling system, and the control valve group is electrically connected with the temperature monitoring module so as to control the closing state of a valve body according to a temperature signal. The energy storage equipment unit has the effect of improving the energy efficiency of the energy storage equipment unit.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage liquid cooling, and in particular to a dual-cold-source energy storage liquid cooling system and a liquid cooling control method. Background Art

[0002] The energy storage liquid cooling system is a cooling technology applied to energy storage equipment. It reduces the internal temperature of the energy storage equipment by circulating liquid coolant. Specifically, the liquid coolant flows through the interior of the energy storage equipment under the guidance of components such as liquid cooling plates, liquid cooling pumps, and liquid cooling pipes, absorbs and takes away heat, and then releases the heat to the external environment through components such as condensers and evaporators, thereby cooling the energy storage equipment.

[0003] However, the existing energy storage liquid cooling systems generally have low energy efficiency, especially the comprehensive energy efficiency of the unit. The operating condition point of the unit is not always at the rated point, and low ambient temperature operating conditions need to be considered. Under low ambient temperature, if compressor refrigeration is used, the unit energy consumption will be high. At the same time, the compressor will run at a low speed for a long time and the oil return will be poor, which will reduce the reliability of the unit. Therefore, there is room for improvement. Summary of the invention

[0004] In order to improve the energy efficiency of energy storage equipment units, the present application provides a dual-cold-source energy storage liquid cooling system and a liquid cooling control method.

[0005] In the first aspect, the present application provides a dual cold source energy storage liquid cooling system, which adopts the following technical solution: A dual-cold-source energy storage liquid cooling system comprises a compressor liquid cooling system, a heat pipe liquid cooling system, a plate exchanger, a temperature monitoring module and a control valve group. The plate exchanger is provided with a water pipeline, a first liquid cooling pipeline and a second liquid cooling pipeline. The water pipeline is used to circulate cooling water. The first liquid cooling pipeline is connected to the compressor liquid cooling system, and the second liquid cooling pipeline is connected to the heat pipe liquid cooling system. The temperature monitoring module is respectively arranged on the pipeline loops of the water loop, the compressor liquid cooling system and the heat pipe liquid cooling system. The temperature monitoring module is used to obtain the internal ambient temperature and the cooling water temperature of the energy storage unit in real time. The control valve group is respectively arranged on the pipeline loops of the water loop, the compressor liquid cooling system and the heat pipe liquid cooling system. The control valve group is electrically connected to the temperature monitoring module to control the closing state of the valve body according to the temperature signal.

[0006] By adopting the above technical scheme, the ambient temperature in the energy storage unit and the cooling water temperature in the water pipeline are monitored in real time by the temperature monitoring module to output a temperature signal to the control valve group. The control valve group controls the conduction of the pipeline loops of the compressor liquid cooling system and the heat pipe liquid cooling system according to the temperature conditions. Specifically, when the temperature monitoring module detects that the ambient temperature in the energy storage unit is lower than the return liquid temperature in the water pipeline, the control valve group makes the cooling circuit of the heat pipe liquid cooling system conductive, and the refrigerant in the water pipeline of the plate exchanger is cooled along the pipeline of the heat pipe liquid cooling system due to the water vapor generated by the high temperature, and is converted into liquid and flows back to the plate exchanger to cool the refrigerant in the water loop, thereby realizing the liquid cooling function; when the temperature monitoring module continuously detects that the return liquid temperature in the water pipeline is always higher than the return liquid temperature setting value in the water pipeline, it indicates that the heat pipe liquid cooling system alone cannot meet the cooling requirements, and the control valve group makes the cooling circuit of the compressor liquid cooling system conductive, and the compressor is started, and the cooling circuit of the compressor liquid cooling system is connected. The compressor is used to compress and cool the water vapor generated by the high temperature of the refrigerant, convert it into liquid, and flow back to the plate exchanger through the throttling of the expansion valve, so as to cool the refrigerant in the water circuit of the plate exchanger. The refrigerant can be regulated by the heat pipe liquid cooling system and the compressor liquid cooling system at the same time. When the ambient temperature in the energy storage unit is greater than or equal to the return liquid temperature, the control valve group disconnects the circuit of the heat pipe liquid cooling system, and only the compressor liquid cooling system is used for cooling regulation. During the liquid cooling process, the entire energy storage unit can control the operation of the heat pipe liquid cooling system or the compressor liquid cooling system according to the ambient temperature and the return liquid temperature of the energy storage unit at low ambient temperatures, so that the energy storage unit will not always use the compressor liquid cooling system for cooling, thereby effectively improving the energy efficiency of the energy storage unit. The liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent and do not interfere with each other. They can operate at the same time. The opening point of the heat pipe liquid cooling system is higher, which makes the comprehensive energy efficiency of the energy storage unit higher.

[0007] Optionally, the compressor liquid cooling system includes a compressor body, a first condenser and a drying filter, and the compressor body, the first condenser and the drying filter are connected in sequence through pipes to form a closed loop. The control valve group includes an electronic expansion valve, and the electronic expansion valve is arranged on the loop of the compressor liquid cooling system. The temperature monitoring module includes a first temperature sensor and a second temperature sensor, and the first temperature sensor and the second temperature sensor are arranged on the loop of the compressor liquid cooling system. The first temperature sensor is used to detect the temperature of the refrigerant input into the plate exchanger, and the second temperature sensor is used to detect the suction temperature input into the compressor. A pressure detection module is also arranged on the loop of the compressor liquid cooling system, and the pressure detection module is respectively arranged at the air inlet and the air outlet of the compressor body, for real-time monitoring of the suction pressure and exhaust pressure of the compressor body.

[0008] By adopting the above technical scheme, the compressor liquid cooling system forms a closed loop, uses the electronic expansion valve to control the refrigerant flow, combines the first temperature sensor to detect the temperature of the refrigerant input to the plate exchanger, the second temperature sensor to detect the suction temperature input to the compressor, and the pressure detection module to monitor the suction pressure and exhaust pressure of the compressor body in real time, thereby realizing comprehensive monitoring and control of the compressor operating status and ensuring the stability and efficiency of the system operation.

[0009] Optionally, the heat pipe liquid cooling system includes a second condenser, which is connected to the plate exchanger through a pipeline to form a closed loop, and the control valve group includes a first ball valve and a second ball valve, which are respectively arranged on the loop of the heat pipe liquid cooling system.

[0010] By adopting the above technical solution, when the temperature monitoring module detects that the ambient temperature in the energy storage unit is lower than the return liquid temperature in the water pipeline, the first ball valve and the second ball valve make the circuit of the heat pipe liquid cooling system conductive, and the refrigerant in the water pipeline of the plate exchanger releases heat and cools along the pipeline of the heat pipe liquid cooling system due to the water vapor generated by the high temperature, and is converted into liquid and flows back to the plate exchanger, thereby cooling the refrigerant in the water circuit and realizing the liquid cooling function.

[0011] Optionally, the second condenser is arranged above the plate exchanger.

[0012] By adopting the above technical solution, the second condenser is arranged above the plate exchanger, so that the liquid coolant formed by the second condenser can automatically flow back into the plate exchanger by gravity, thereby realizing the liquid cooling function.

[0013] Optionally, the water pipeline on the plate changer is provided with a return liquid port and a liquid supply port, the return liquid port is connected to a return liquid pipe, a water pump is provided on the return liquid pipe, the control valve group includes a liquid adding valve, the liquid adding valve is provided on the return liquid pipe, the temperature detection module includes a return liquid temperature sensor, the return liquid temperature sensor is provided at the pipe mouth of the return liquid pipe, an automatic exhaust valve, a return liquid pressure gauge and an expansion tank are also provided at the pipe mouth of the return liquid pipe, the liquid supply port of the plate changer is connected to a liquid supply pipe, a PTC electric heater is provided on the liquid supply pipe, a liquid supply pressure gauge is provided at the liquid supply port of the liquid supply pipe, and the temperature detection module also includes a liquid supply temperature sensor, and the liquid supply temperature sensor is provided at the pipe mouth of the liquid supply pipe.

[0014] By adopting the above technical scheme, the water pipeline of the plate exchanger forms a water circuit for the flow of refrigerant, which is used for liquid cooling and heat dissipation of the energy storage unit. The refrigerant after passing through the energy storage unit flows into the return pipe. The return liquid temperature is monitored in real time by the return liquid temperature sensor, which is used to compare with the ambient temperature in the energy storage unit to control the start-up of the heat pipe liquid cooling system or the compressor liquid cooling system, thereby ensuring the refrigerant flow control during the return liquid process. The provision of the automatic exhaust valve, the return liquid pressure gauge and the expansion tank further improves the safety and stability of the liquid cooling system. The coolant after refrigeration and cooling by the heat pipe liquid cooling system or the compressor liquid cooling system flows out from the liquid supply pipe into the energy storage unit. The PTC electric heater on the liquid supply pipe can adjust the liquid temperature as needed. The liquid supply temperature sensor and the liquid supply pressure gauge ensure that the temperature and pressure of the supplied liquid are within a reasonable range, thereby improving the operating efficiency and reliability of the entire system.

[0015] Optionally, the temperature monitoring module further includes an in-machine ambient temperature sensor, and the in-machine ambient temperature sensor is electrically connected to the control valve group.

[0016] By adopting the above technical solution, the ambient temperature inside the energy storage unit is obtained in real time through the ambient temperature sensor inside the unit for comparison with the return liquid temperature, so that the control valve group can control the start-up of the heat pipe liquid cooling system and / or the press liquid cooling system according to the comparison result to cool the refrigerant in the plate exchanger.

[0017] In a second aspect, the present application provides a control method for a dual cold source energy storage liquid cooling system applied to the above dual cold source energy storage liquid cooling system, which adopts the following technical solution: A dual-cold-source energy storage liquid cooling system control method, the dual-cold-source energy storage liquid cooling system control method comprising the steps of: Obtain the return liquid temperature in the water pipeline of the plate exchanger and the ambient temperature in the energy storage unit; Inputting the return liquid temperature and the ambient temperature into a preset temperature analysis model to obtain a temperature comparison result; Generate a first control instruction based on the temperature comparison result, obtain a first valve group parameter in response to the first control instruction, control the start-up of the heat pipe liquid cooling system according to the first valve group parameter, and obtain the cooling capacity of the heat pipe liquid cooling system; Obtaining the thermal load data of the battery of the energy storage unit, comparing the cooling capacity of the heat pipe liquid cooling system with the thermal load data of the battery of the energy storage unit, and obtaining the thermal load analysis result of the energy storage unit; Based on the heat load analysis result and temperature comparison result of the energy storage unit, a second control instruction is generated, a second valve group parameter is obtained in response to the second control instruction, and the compressor liquid cooling system is controlled to start according to the second valve group parameter.

[0018] By adopting the above technical solution, during the liquid cooling start-up process of the energy storage unit, the return liquid temperature sensor and the ambient temperature sensor in the energy storage unit are used to respectively obtain the return liquid temperature on the water pipe of the plate exchanger and the ambient temperature in the energy storage unit, and the return liquid temperature and the ambient temperature are input into the preset temperature analysis model. The temperature analysis model is used to judge the size of the return liquid temperature and the ambient temperature to obtain a temperature comparison result. The temperature comparison result specifically includes that the ambient temperature is less than the return liquid temperature or the ambient temperature is greater than or equal to the return liquid temperature. When the ambient temperature is less than the return liquid temperature, a first control instruction is generated. The first control instruction refers to a control instruction for controlling the start-up of the heat pipe liquid cooling system. In response to the first control instruction, a first valve group parameter is obtained. The first valve group parameter refers to the opening of the first ball valve and the second ball valve in the heat pipe liquid cooling system, so that the heat pipe liquid cooling system is started, and the cooling capacity of the heat pipe liquid cooling system is obtained. The cooling capacity of the heat pipe liquid cooling system is compared with the heat load data of the energy storage unit to obtain the heat load analysis result of the energy storage unit. The heat load analysis result of the energy storage unit refers to the heat pipe The size of the cooling capacity of the liquid cooling system and the heat load data of the energy storage unit. When the heat pipe liquid cooling system is started, the cooling capacity of the heat pipe liquid cooling system is less than the heat load data of the energy storage unit and the return liquid temperature is continuously greater than the return liquid temperature setting value, then a second control instruction is generated. The second control instruction refers to the control instruction for controlling the start of the compressor liquid cooling system. In response to the second control instruction, the second valve group parameter is obtained. The second valve group parameter refers to the opening of the electronic expansion valve on the compressor liquid cooling system, so that the compressor liquid cooling system is started, and the control start-up process of the dual cold source liquid cooling system of the energy storage unit is completed. According to the ambient temperature and the return liquid temperature (measured value and set value) in the energy storage unit, the operation of the heat pipe liquid cooling system or the compressor liquid cooling system can be controlled, so that the energy storage unit will not always use the compressor liquid cooling system for cooling, thereby effectively improving the energy efficiency of the energy storage unit. The liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent and do not interfere with each other. They can run at the same time. The opening point of the heat pipe liquid cooling system is higher, which makes the comprehensive energy efficiency of the energy storage unit higher.

[0019] In a preferred example, the present application can be further configured as follows: the liquid return temperature and the ambient temperature are input into a preset temperature analysis model to obtain a temperature comparison result, specifically including: Inputting the return liquid temperature and the ambient temperature into a preset temperature analysis model, and generating a temperature data line based on the ambient temperature; Compare the liquid return temperature with the temperature data line, and calculate the area where the liquid return temperature exceeds the temperature data line; The temperature comparison result is determined based on the comparison between the area of ​​the region and a preset area judgment condition.

[0020] By adopting the above technical solution, the return liquid temperature and the ambient temperature are input into a preset temperature analysis model, and a temperature data line is generated in the temperature analysis model using the ambient temperature to analyze the size of the return liquid temperature and the ambient temperature. The return liquid temperature is compared with the temperature data line, and the area of ​​the region where the return liquid temperature exceeds the temperature data line is calculated. The size of the area is used to identify the specific size of the return liquid temperature of the refrigerant of the energy storage unit and the ambient temperature in the energy storage unit, thereby improving the accuracy of temperature anomaly analysis.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The temperature monitoring module is used to monitor the ambient temperature in the energy storage unit and the cooling water temperature in the water pipeline in real time, so as to output a temperature signal to the control valve group. The control valve group controls the conduction of the pipeline loops of the compressor liquid cooling system and the heat pipe liquid cooling system according to the temperature conditions. Specifically, when the temperature monitoring module detects that the ambient temperature in the energy storage unit is lower than the return liquid temperature in the water pipeline, the control valve group makes the cooling circuit of the heat pipe liquid cooling system conduct. The water vapor generated by the high temperature in the water pipeline of the plate exchanger is cooled along the pipeline of the heat pipe liquid cooling system by heat release, converted into liquid, and flows back to the plate exchanger to cool the refrigerant in the water loop, thereby realizing the liquid cooling function. When the temperature monitoring module continuously detects that the return liquid temperature in the water pipeline is always higher than the return liquid temperature setting value in the water pipeline, it indicates that the heat pipe liquid cooling system alone cannot meet the cooling requirements. The control valve group makes the cooling circuit of the compressor liquid cooling system conduct, and the compressor is started. The water vapor generated by the high temperature of the refrigerant is compressed and cooled, converted into liquid, and throttled back to the plate exchanger through the expansion valve, cooling the refrigerant in the water circuit of the plate exchanger. The refrigerant can be regulated by the heat pipe liquid cooling system and the compressor liquid cooling system at the same time. When the ambient temperature in the energy storage unit is greater than or equal to the return liquid temperature, the control valve group disconnects the circuit of the heat pipe liquid cooling system, and only the compressor liquid cooling system is used for cooling regulation. During the liquid cooling process of the entire energy storage unit, at low ambient temperatures, the operation of the heat pipe liquid cooling system or the compressor liquid cooling system can be controlled according to the ambient temperature and the return liquid temperature in the energy storage unit, so that the energy storage unit will not always use the compressor liquid cooling system for cooling, thereby effectively improving the energy efficiency of the energy storage unit. The liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent and do not interfere with each other. They can operate at the same time. The opening point of the heat pipe liquid cooling system is higher, making the comprehensive energy efficiency of the energy storage unit higher. 2. The compressor liquid cooling system forms a closed loop, using an electronic expansion valve to control the refrigerant flow rate, combined with the first temperature sensor to detect the temperature of the refrigerant input to the plate exchanger, the second temperature sensor to detect the suction temperature input to the compressor, and the pressure detection module to monitor the suction pressure and exhaust pressure of the compressor body in real time, realizing comprehensive monitoring and control of the compressor operation status, ensuring the stability and efficiency of the system operation; 3. When the temperature monitoring module detects that the ambient temperature in the energy storage unit is lower than the return liquid temperature in the water pipeline, the first ball valve and the second ball valve make the circuit of the heat pipe liquid cooling system conductive, and the refrigerant in the water pipeline of the plate exchanger generates water vapor due to high temperature, which is cooled along the pipeline of the heat pipe liquid cooling system and converted into liquid, and flows back to the plate exchanger to cool the refrigerant in the water circuit to realize the liquid cooling function. The second condenser is arranged above the plate exchanger, so that the liquid coolant formed by the second condenser can automatically flow back to the plate exchanger by gravity, which is convenient for realizing the liquid cooling function; 4. The ambient temperature inside the energy storage unit is obtained in real time through the ambient temperature sensor inside the unit, which is used to compare with the return liquid temperature, so that according to the comparison result, the control valve group can control the start-up of the heat pipe liquid cooling system and / or the press liquid cooling system to cool the refrigerant in the plate exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a control system of a dual cold source energy storage liquid cooling system in one embodiment of the present application; Figure 2 This is a flow chart of a control method for a dual-cold-source energy storage liquid cooling system in an embodiment of the present application; Figure 3 It is a flowchart for implementing step S20 in a control method of a dual cold source energy storage liquid cooling system control system in one embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-3 This application is described in further detail.

[0024] In one embodiment, if Figure 1As shown, the present application discloses a control system of a dual-cold source energy storage liquid cooling system, a dual-cold source energy storage liquid cooling system, including a compressor liquid cooling system, a heat pipe liquid cooling system, a plate exchanger, a temperature monitoring module and a control valve group. The plate exchanger is provided with a water pipeline, a first liquid cooling pipeline and a second liquid cooling pipeline. The water pipeline is used to circulate cooling water. The water pipeline on the plate exchanger is provided with a return liquid port and a liquid supply port. The return liquid port is connected to a return liquid pipe, a water pump is provided on the return liquid pipe, an automatic exhaust valve, a return liquid pressure gauge and an expansion tank are provided at the pipe mouth of the return liquid pipe, the liquid supply port is connected to a liquid supply pipe, a PTC electric heater is provided on the liquid supply pipe, and a liquid supply pressure gauge is provided at the liquid supply port of the liquid supply pipe.

[0025] The first liquid cooling pipeline is connected to the compressor liquid cooling system, and the second liquid cooling pipeline is connected to the heat pipe liquid cooling system. The compressor liquid cooling system includes a compressor body, a first condenser and a drying filter. The compressor body, the first condenser and the drying filter are connected in sequence through pipelines to form a closed loop. The heat pipe liquid cooling system includes a second condenser. The second condenser is connected to the plate exchanger through a pipeline to form a closed loop. The second condenser is arranged above the plate exchanger, so that the liquid coolant formed by the second condenser can automatically flow back to the plate exchanger by gravity.

[0026] The control valve groups are respectively arranged on the pipeline loops of the water circuit, the compressor liquid cooling system and the heat pipe liquid cooling system. The control valve groups are electrically connected to the temperature monitoring module to control the closing state of the valve body according to the temperature signal. The control valve group includes an electronic expansion valve, a liquid adding valve, a first ball valve and a second ball valve. The electronic expansion valve is arranged on the loop of the compressor liquid cooling system, the liquid adding valve is arranged on the return liquid pipe, and the first ball valve and the second ball valve are respectively arranged on the loop of the heat pipe liquid cooling system.

[0027] The temperature monitoring modules are respectively arranged on the pipeline loops of the water circuit, the compressor liquid cooling system and the heat pipe liquid cooling system. The temperature monitoring module is used to obtain the internal ambient temperature and the cooling water temperature of the energy storage unit in real time. The temperature monitoring module includes a first temperature sensor, a second temperature sensor, a return liquid temperature sensor, a supply liquid temperature sensor and an internal ambient temperature sensor. The first temperature sensor and the second temperature sensor are arranged on the loop of the compressor liquid cooling system. The first temperature sensor is used to detect the temperature of the refrigerant input into the plate exchanger, and the second temperature sensor is used to detect the suction temperature input into the compressor. The return liquid temperature sensor is arranged at the pipe mouth of the return liquid pipe, and the supply liquid temperature sensor is arranged at the pipe mouth of the supply liquid pipe.

[0028] The implementation principle of a dual-cold-source energy storage liquid cooling system control system in an embodiment of the present application is as follows: the ambient temperature in the energy storage unit and the cooling water temperature in the water pipeline are monitored in real time by a temperature monitoring module to output a temperature signal to the control valve group. The control valve group controls the conduction of the pipeline loops of the compressor liquid cooling system and the heat pipe liquid cooling system according to the temperature conditions. Specifically, when the temperature monitoring module detects that the ambient temperature in the energy storage unit is lower than the return liquid temperature in the water pipeline, the control valve group makes the cooling loop of the heat pipe liquid cooling system conductive, and the water vapor generated by the high temperature in the water pipeline of the plate exchanger is cooled along the pipeline of the heat pipe liquid cooling system by heat release, converted into liquid, and flows back to the plate exchanger to cool the refrigerant in the water loop, thereby realizing the liquid cooling function; when the temperature monitoring module continuously detects that the return liquid temperature in the water pipeline is always higher than the return liquid temperature setting value in the water pipeline, it indicates that the cooling and temperature reduction requirements cannot be met by the heat pipe liquid cooling system alone, and the control valve group makes the cooling loop of the compressor liquid cooling system conductive. The compressor is started, and the compressor is used to compress and cool the water vapor generated by the high temperature of the refrigerant, convert it into liquid, and flow back to the plate exchanger through the expansion valve throttling, cooling the refrigerant in the water circuit of the plate exchanger. The refrigerant can be regulated by the heat pipe liquid cooling system and the compressor liquid cooling system at the same time; when the ambient temperature in the energy storage unit is greater than or equal to the return liquid temperature, the control valve group disconnects the circuit of the heat pipe liquid cooling system, and only the compressor liquid cooling system is used for cooling regulation. During the liquid cooling process of the entire energy storage unit, at a low ambient temperature, the operation of the heat pipe liquid cooling system or the compressor liquid cooling system can be controlled according to the ambient temperature and the return liquid temperature in the energy storage unit, so that the energy storage unit will not always use the compressor liquid cooling system for cooling, thereby effectively improving the energy efficiency of the energy storage unit, and the liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent, do not interfere with each other, and can operate at the same time. The opening point of the heat pipe liquid cooling system is higher, so that the comprehensive energy efficiency of the energy storage unit is higher.

[0029] In one embodiment, if Figure 2 As shown, the present application discloses a control method for a dual-cold-source energy storage liquid cooling system, which specifically includes the following steps: S10: Obtain the return liquid temperature in the water pipe of the plate heat exchanger and the ambient temperature in the energy storage unit.

[0030] Specifically, during the liquid-cooled startup of the energy storage unit, the return liquid temperature sensor and the ambient temperature sensor in the energy storage unit are used to obtain the return liquid temperature on the water pipeline of the plate exchanger and the ambient temperature in the energy storage unit respectively.

[0031] S20: Inputting the return liquid temperature and the ambient temperature into a preset temperature analysis model to obtain a temperature comparison result.

[0032] Specifically, the return liquid temperature and the ambient temperature are input into a preset temperature analysis model, and the temperature analysis model is used to determine the size of the return liquid temperature and the ambient temperature to obtain a temperature comparison result. The temperature comparison result specifically includes that the ambient temperature is less than the return liquid temperature or the ambient temperature is greater than or equal to the return liquid temperature.

[0033] S30: Generate a first control instruction based on the temperature comparison result, obtain a first valve group parameter in response to the first control instruction, control the start-up of the heat pipe liquid cooling system according to the first valve group parameter, and obtain the cooling capacity of the heat pipe liquid cooling system.

[0034] Specifically, when the ambient temperature is lower than the return liquid temperature, a first control instruction is generated. The first control instruction refers to a control instruction for controlling the start-up of the heat pipe liquid cooling system. In response to the first control instruction, a first valve group parameter is obtained. The first valve group parameter refers to the opening of a first ball valve and a second ball valve in the heat pipe liquid cooling system, so that the heat pipe liquid cooling system is started and the cooling capacity of the heat pipe liquid cooling system is obtained.

[0035] S40: Acquire the thermal load data of the battery of the energy storage unit, compare the cooling capacity of the heat pipe liquid cooling system with the thermal load data of the battery of the energy storage unit, and obtain the thermal load analysis result of the energy storage unit.

[0036] Specifically, the cooling capacity of the heat pipe liquid cooling system is compared with the heat load data of the energy storage unit to obtain the heat load analysis result of the energy storage unit. The heat load analysis result of the energy storage unit refers to the size of the cooling capacity of the heat pipe liquid cooling system and the heat load data of the energy storage unit.

[0037] S50: Generate a second control instruction based on the energy storage unit heat load analysis result and the temperature comparison result, obtain a second valve group parameter in response to the second control instruction, and control the compressor liquid cooling system to start according to the second valve group parameter.

[0038] Specifically, when the heat pipe liquid cooling system is started, the cooling capacity of the heat pipe liquid cooling system is less than the heat load data of the energy storage unit and the return liquid temperature is continuously greater than the ambient temperature, a second control instruction is generated. The second control instruction refers to a control instruction for controlling the start of the compressor liquid cooling system. In response to the second control instruction, a second valve group parameter is obtained. The second valve group parameter refers to the opening of the electronic expansion valve on the compressor liquid cooling system, so that the compressor liquid cooling system is started.

[0039] In this embodiment, during the liquid cooling start-up process of the energy storage unit, the return liquid temperature sensor and the ambient temperature sensor in the energy storage unit are used to respectively obtain the return liquid temperature on the water pipe of the plate exchanger and the ambient temperature in the energy storage unit, and the return liquid temperature and the ambient temperature are input into a preset temperature analysis model. The temperature analysis model is used to judge the size of the return liquid temperature and the ambient temperature to obtain a temperature comparison result. The temperature comparison result specifically includes that the ambient temperature is less than the return liquid temperature or the ambient temperature is greater than or equal to the return liquid temperature. When the ambient temperature is less than the return liquid temperature, a first control instruction is generated. The first control instruction refers to a control instruction for controlling the start-up of the heat pipe liquid cooling system. In response to the first control instruction, a first valve group parameter is obtained. The first valve group parameter refers to the opening of the first ball valve and the second ball valve in the heat pipe liquid cooling system, so that the heat pipe liquid cooling system is started, and the cooling capacity of the heat pipe liquid cooling system is obtained. The cooling capacity of the heat pipe liquid cooling system is compared with the heat load data of the energy storage unit to obtain the heat load analysis result of the energy storage unit. The heat load analysis result of the energy storage unit refers to the heat pipe liquid cooling. The size of the system cooling capacity and the heat load data of the energy storage unit. When the heat pipe liquid cooling system is started, the cooling capacity of the heat pipe liquid cooling system is less than the heat load data of the energy storage unit and the return liquid temperature is continuously greater than the return liquid temperature setting value, then a second control instruction is generated. The second control instruction refers to the control instruction for controlling the start of the compressor liquid cooling system. In response to the second control instruction, the second valve group parameter is obtained. The second valve group parameter refers to the opening of the electronic expansion valve on the compressor liquid cooling system, so that the compressor liquid cooling system is started, and the control start-up process of the dual cold source liquid cooling system of the energy storage unit is completed. According to the ambient temperature and the return liquid temperature (measured value and set value) in the energy storage unit, the operation of the heat pipe liquid cooling system or the compressor liquid cooling system can be controlled, so that the energy storage unit will not always use the compressor liquid cooling system for cooling, thereby effectively improving the energy efficiency of the energy storage unit. The liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent and do not interfere with each other. They can run at the same time. The opening point of the heat pipe liquid cooling system is higher, which makes the comprehensive energy efficiency of the energy storage unit higher.

[0040] In one embodiment, if Figure 3 As shown, in step S20, the return liquid temperature and the ambient temperature are input into a preset temperature analysis model to obtain a temperature comparison result, which specifically includes: S21: Inputting the return liquid temperature and the ambient temperature into a preset temperature analysis model, and generating a temperature data line based on the ambient temperature.

[0041] S22: Compare the liquid return temperature with the temperature data line, and calculate the area where the liquid return temperature exceeds the temperature data line.

[0042] S23: Determine a temperature comparison result based on comparing the area of ​​the region with a preset area judgment condition.

[0043] Specifically, the return liquid temperature and the ambient temperature are input into a preset temperature analysis model, and a temperature data line is generated in the temperature analysis model using the ambient temperature to analyze the size of the return liquid temperature and the ambient temperature. The return liquid temperature is compared with the temperature data line, and the area of ​​the region where the return liquid temperature exceeds the temperature data line is calculated. The size of the area is used to identify the specific size of the return liquid temperature of the refrigerant of the energy storage unit and the ambient temperature in the energy storage unit, thereby improving the accuracy of temperature anomaly analysis.

[0044] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0045] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A dual cold source energy storage liquid cooling system, characterized in that: It includes a compressor liquid cooling system, a heat pipe liquid cooling system, a plate heat exchanger, a temperature monitoring module and a control valve group. The plate heat exchanger is provided with a water pipeline, a first liquid cooling pipeline and a second liquid cooling pipeline. The water pipeline is used to circulate cooling water. The first liquid cooling pipeline is connected to the compressor liquid cooling system, and the second liquid cooling pipeline is connected to the heat pipe liquid cooling system. The temperature monitoring module is respectively arranged on the water circuit loop, the compressor liquid cooling system and the pipeline loop of the heat pipe liquid cooling system. The temperature monitoring module is used to obtain the internal ambient temperature and the cooling water temperature of the energy storage unit in real time. The control valve group is respectively arranged on the water circuit loop, the compressor liquid cooling system and the pipeline loop of the heat pipe liquid cooling system. The control valve group is electrically connected to the temperature monitoring module to control the closing state of the valve body according to the temperature signal.

2. A dual cold source energy storage liquid cooling system according to claim 1, characterized in that: The compressor liquid cooling system includes a compressor body, a first condenser and a drying filter, which are connected in sequence through pipelines to form a closed loop. The control valve group includes an electronic expansion valve, which is arranged on the loop of the compressor liquid cooling system. The temperature monitoring module includes a first temperature sensor and a second temperature sensor, which are arranged on the loop of the compressor liquid cooling system. The first temperature sensor is used to detect the temperature of the refrigerant input into the plate exchanger, and the second temperature sensor is used to detect the suction temperature input into the compressor. A pressure detection module is also arranged on the loop of the compressor liquid cooling system, and the pressure detection module is respectively arranged at the air inlet and the air outlet of the compressor body, and is used to monitor the suction pressure and exhaust pressure of the compressor body in real time.

3. A dual cold source energy storage liquid cooling system according to claim 1, characterized in that: The heat pipe liquid cooling system includes a second condenser, which is connected to the plate exchanger through a pipeline to form a closed loop. The control valve group includes a first ball valve and a second ball valve, which are respectively arranged on the loop of the heat pipe liquid cooling system.

4. A dual cold source energy storage liquid cooling system according to claim 3, characterized in that: The second condenser is arranged above the plate exchanger.

5. The dual cold source energy storage liquid cooling system according to claim 1, characterized in that: The water pipeline on the plate changer is provided with a return liquid port and a liquid supply port, the return liquid port is connected to a return liquid pipe, a water pump is provided on the return liquid pipe, the control valve group includes a liquid adding valve, the liquid adding valve is provided on the return liquid pipe, the temperature detection module includes a return liquid temperature sensor, the return liquid temperature sensor is provided at the pipe mouth of the return liquid pipe, an automatic exhaust valve, a return liquid pressure gauge and an expansion tank are also provided at the pipe mouth of the return liquid pipe, the liquid supply port of the plate changer is connected to the liquid supply pipe, a PTC electric heater is provided on the liquid supply pipe, a liquid supply pressure gauge is provided at the liquid supply port of the liquid supply pipe, the temperature detection module also includes a liquid supply temperature sensor, and the liquid supply temperature sensor is provided at the pipe mouth of the liquid supply pipe.

6. A dual cold source energy storage liquid cooling system according to claim 1, characterized in that: The temperature monitoring module also includes an in-machine environment temperature sensor, and the in-machine environment temperature sensor is electrically connected to the control valve group.

7. A control method for a dual cold source energy storage liquid cooling system based on the dual cold source energy storage liquid cooling system according to any one of claims 1 to 6, characterized in that: The dual cold source energy storage liquid cooling system control method comprises the following steps: Obtain the return liquid temperature in the water pipeline of the plate exchanger and the ambient temperature in the energy storage unit; Inputting the return liquid temperature and the ambient temperature into a preset temperature analysis model to obtain a temperature comparison result; Generate a first control instruction based on the temperature comparison result, obtain a first valve group parameter in response to the first control instruction, control the start-up of the heat pipe liquid cooling system according to the first valve group parameter, and obtain the cooling capacity of the heat pipe liquid cooling system; Obtaining the thermal load data of the battery of the energy storage unit, comparing the cooling capacity of the heat pipe liquid cooling system with the thermal load data of the battery of the energy storage unit, and obtaining the thermal load analysis result of the energy storage unit; Based on the heat load analysis result and temperature comparison result of the energy storage unit, a second control instruction is generated, a second valve group parameter is obtained in response to the second control instruction, and the compressor liquid cooling system is controlled to start according to the second valve group parameter.

8. A dual cold source energy storage liquid cooling system control method according to claim 7, characterized in that: The inputting the return liquid temperature and the ambient temperature into a preset temperature analysis model to obtain a temperature comparison result specifically includes: Inputting the return liquid temperature and the ambient temperature into a preset temperature analysis model, and generating a temperature data line based on the ambient temperature; Compare the liquid return temperature with the temperature data line, and calculate the area where the liquid return temperature exceeds the temperature data line; The temperature comparison result is determined by comparing the area of ​​the region with a preset area judgment condition.

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