A constant temperature unit system for energy storage and a control method thereof

Abstract

The application relates to a constant-temperature unit system for energy storage, which provides two battery cabin medium paths and two inverter medium paths to solve the problems that the existing constant-temperature unit system cannot normally work at low temperature and the PCS cannot cool under high or low temperature conditions of liquid cooling; and a control method for the constant-temperature unit system for energy storage is designed, the inverter target water temperature and the battery cabin target water temperature are obtained, the corresponding regulation and control are performed by combining the comparison relationship of the inverter target water temperature and the battery cabin target water temperature with the radiator outlet water temperature, the inverter outlet water temperature and the battery outlet water temperature, and the problem that the overall energy consumption of the system is high can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of constant temperature unit, in particular to a constant temperature unit system for energy storage and a control method thereof. BACKGROUND

[0002] During the energy transportation and storage process, the energy storage equipment will generate or absorb heat, and when the equipment is used at a temperature that is too high or too low, it may lead to uncontrollable situations and cause irreparable losses. Therefore, it is necessary to control the temperature of the equipment separately, and the temperature control equipment is crucial.

[0003] The existing temperature control equipment has the following disadvantages,

[0004] 1. The constant temperature control equipment must be compressed and refrigerated, and then converted through an intermediate medium;

[0005] 2. The existing equipment has high energy consumption, and cannot operate normally in a relatively low temperature environment, which may lead to the following situations,

[0006] It cannot work at a relatively low temperature and is prone to damage to related parts;

[0007] It cannot provide refrigeration to liquid-cooled PCS separately, and cannot ensure that the liquid-cooled PCS can work normally at high or relatively low temperatures;

[0008] Energy is wasted, and the compressor needs to be started in any case, which causes an additional energy input to the compressor and waste. SUMMARY

[0009] To at least solve one of the defects in the prior art, the purpose of the present application is to provide a constant temperature unit system for energy storage.

[0010] The technical solution adopted by the present application to solve the problem is: a constant temperature unit system for energy storage, comprising:

[0011] Two battery cabin medium paths and two inverter medium paths, wherein,

[0012] The first battery cabin medium path comprises, in sequence, a battery cabin water pump, a battery three-way ball valve, a plate heat exchanger, a plate exchange battery outlet water temperature sensor, a heater, a battery inlet water temperature sensor, a battery inlet water temperature pressure sensor, an energy storage battery pack, a battery outlet water pressure sensor, a battery outlet water temperature sensor, a filter, a water supplement tank, and a battery cabin water pump;

[0013] The second battery cabin medium path comprises, which are connected in sequence, a battery cabin water pump, a battery three-way ball valve, a radiator, a radiator outlet water temperature sensor, a heater, a battery inlet water temperature sensor, a battery inlet water pressure sensor, an energy storage battery pack, a battery outlet water pressure sensor, a battery outlet water temperature sensor, a filter, a water supplement tank, and the battery cabin water pump;

[0014] The first inverter medium path comprises, which are connected in sequence, an inverter water pump, an inverter three-way ball valve, a plate heat exchanger, an inverter outlet water temperature sensor, an inverter inlet water temperature sensor, an inverter inlet water pressure sensor, an energy storage inverter, an inverter outlet water pressure sensor, an inverter outlet water, a filter screen, a water supplement tank, and the inverter water pump;

[0015] The second inverter medium path comprises, which are connected in sequence, an inverter water pump, an inverter three-way ball valve, a radiator, a radiator outlet water temperature sensor, an inverter inlet water temperature sensor, an inverter inlet water pressure sensor, an energy storage inverter, an inverter outlet water pressure sensor, an inverter outlet water, a filter screen, a water supplement tank, and the inverter water pump.

[0016] The battery outlet water pressure sensor is used for detecting the outlet water pressure of the battery side system to avoid the battery side system from leaking due to excessively high pressure; the battery outlet water temperature sensor is used for obtaining the outlet water temperature of the battery; the battery liquid level sensor is used for detecting the liquid level of the battery side system, and reminding the user to add cooling liquid when the liquid level reaches a certain degree; the radiator outlet water temperature sensor is used for obtaining the outlet water temperature of the radiator; the plate heat exchanger battery outlet water temperature sensor is used for obtaining the outlet water temperature of the battery side plate heat exchanger; the battery inlet water temperature sensor is used for obtaining the inlet water temperature of the battery; the battery inlet water pressure sensor is used for detecting the inlet water pressure of the system to avoid the system components from being damaged due to water shortage of the battery side system; the inverter outlet water pressure sensor is used for detecting the outlet water pressure of the inverter side system to avoid the inverter side system from leaking due to excessively high pressure; the inverter outlet water temperature sensor is used for obtaining the outlet water temperature of the inverter; the inverter liquid level sensor is used for detecting the liquid level of the inverter side system, and reminding the user to add cooling liquid when the liquid level reaches a certain degree; the plate heat exchanger inverter outlet water temperature sensor is used for obtaining the outlet water temperature of the plate heat exchanger inverter side; the inverter inlet water temperature sensor is used for obtaining the inlet water temperature of the inverter; and the inverter inlet water pressure sensor is used for detecting the inlet water pressure of the system to avoid the system components from being damaged due to water shortage of the inverter side system.

[0017] Further, the system further comprises a condenser device,

[0018] The condenser device comprises, which are connected in sequence, a condenser, a liquid storage tank, a pressure switch, an electronic expansion valve, a plate heat exchanger, a compressor side pressure sensor, a suction temperature sensor, a gas-liquid separator, an electric compressor, and the condenser.

[0019] The condenser device is used for providing a condensing function.

[0020] Further, the system further comprises a cooling fan for cooling the system.

[0021] The application further provides a control method of the constant-temperature unit system for energy storage.

[0022] When the system is started each time, all ball valves are opened to the intermediate state, and the first battery cabin medium path, the second battery cabin medium path, the first inverter medium path and the second inverter medium path all have medium flowing; the cooling fan is started, and after waiting for a preset time length, the following judgment is made,

[0023] The inverter target water temperature and the battery cabin target water temperature are obtained.

[0024] The opening conditions of the battery cabin water pump and the inverter water pump are judged, and the on-off quantity adjustment of the battery three-way ball valve is made based on the opening conditions of the battery cabin water pump and the inverter water pump.

[0025] Then, if heating is needed, the heating requirements of the inverter and the battery are further determined, and the on-off quantity of the three-way ball valve is adjusted through the PID algorithm according to the heating requirements of the inverter and the battery.

[0026] Further, specifically, the opening conditions of the battery cabin water pump and the inverter water pump are judged, and the on-off quantity adjustment of the battery three-way ball valve is made based on the opening conditions of the battery cabin water pump and the inverter water pump, including,

[0027] When only the battery cabin water pump or only the energy storage inverter water pump is started,

[0028] When the inverter target water temperature is less than the radiator outlet water temperature, the radiator outlet water temperature is greater than the inverter outlet water temperature, or the battery cabin target water temperature is less than the radiator outlet water temperature, and the radiator outlet water temperature is greater than the battery outlet water temperature, all of the three-way ball valve leading to the radiator side are closed.

[0029] When the inverter target water temperature is greater than the radiator outlet water temperature or the battery cabin target water temperature is greater than the radiator outlet water temperature, all of the three-way ball valve leading to the plate heat exchanger side are closed.

[0030] When the inverter target water temperature is less than the radiator outlet water temperature, the radiator outlet water temperature is less than the inverter outlet water temperature, or the battery cabin target water temperature is less than the radiator outlet water temperature, and the radiator outlet water temperature is less than the battery outlet water temperature, the on-off quantity of the three-way ball valve is adjusted through the PID algorithm according to the inverter target water temperature or the battery cabin target water temperature.

[0031] When the battery cabin water pump and the energy storage inverter water pump are both started,

[0032] When the inverter target water temperature is greater than the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger.

[0033] When the inverter target water temperature is greater than the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger.

[0034] When the inverter target water temperature is greater than the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger.

[0035] When the inverter target water temperature is greater than the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger.

[0036] When the inverter target water temperature is greater than the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger.

[0037] When the inverter target water temperature is greater than the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger.

[0038] When the inverter target water temperature is greater than the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger.

[0039] Further, specifically, the opening and closing amount of the three-way ball valve is adjusted by a PID algorithm according to the heating demand of the inverter and the battery, comprising,

[0040] When the inverter and the battery both need heating, the inverter three-way ball valve and the battery cabin ball valve are both opened to the radiator side, and the heater is turned on for heating,

[0041] When the inverter needs heating and the battery needs cooling, the inverter three-way ball valve is opened to the radiator side, and the battery cabin three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the battery cabin target water temperature through a PID algorithm.

[0042] When the battery cabin needs heating and the inverter needs cooling, the battery cabin three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the battery cabin target water temperature through a PID algorithm.

[0043] The present application has the following advantages: a constant temperature unit system for energy storage is provided, which proposes two battery cabin medium paths and two inverter medium paths to solve the problems of low temperature and liquid cooling in high temperature or low temperature conditions, and the PCS cannot cool; and a control method for the constant temperature unit system for energy storage is designed, which obtains the inverter target water temperature and the battery cabin target water temperature, and adjusts and controls according to the comparison relationship between the inverter target water temperature and the battery cabin target water temperature and the radiator outlet water temperature, the inverter outlet water temperature and the battery outlet water temperature, so as to solve the problem of high overall energy consumption of the system. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly described below. Obviously, the described drawings are only part of the embodiments of the present application, and not all embodiments, and those skilled in the art can obtain other design schemes and drawings according to these drawings without creative labor.

[0045] Figure 1 The structural principle diagram of the constant temperature unit system for energy storage of the present application;

[0046] Figure 2 The central controller control relationship diagram of the constant temperature unit system for energy storage of the present application. DETAILED DESCRIPTION

[0047] The concept, specific structure and generated technical effects of the present application will be described clearly and completely in combination with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and other embodiments obtained by those skilled in the art without creative labor based on the embodiments of the present application are within the protection scope of the present application. In addition, all the connection relationships mentioned in the text do not mean that the elements are directly connected, but that a more optimal circuit structure can be composed by adding or reducing connecting elements according to the specific implementation. The technical features in the present application can be combined interactively without conflict.

[0048] Reference Figure 1 And Figure 2 Embodiment 1, a constant temperature unit system for energy storage, comprising:

[0049] Two battery cabin medium paths and two inverter medium paths, wherein,

[0050] The first battery cabin medium path comprises, in sequence, a battery cabin water pump, a battery three-way ball valve, a plate heat exchanger, a plate heat exchanger battery outlet water temperature sensor, a heater, a battery inlet water temperature sensor, a battery inlet water temperature pressure sensor, an energy storage battery pack, a battery outlet water pressure sensor, a battery outlet water temperature sensor, a filter, a water supplement tank, and a battery cabin water pump;

[0051] The second battery cabin medium path comprises, in sequence, a battery cabin water pump, a battery three-way ball valve, a radiator, a radiator outlet water temperature sensor, a heater, a battery inlet water temperature sensor, a battery inlet water pressure sensor, an energy storage battery pack, a battery outlet water pressure sensor, a battery outlet water temperature sensor, a filter, a water supplement tank, and a battery cabin water pump;

[0052] The first inverter medium path comprises, in sequence, an inverter water pump, an inverter three-way ball valve, a plate heat exchanger, an inverter outlet water temperature sensor, an inverter inlet water temperature sensor, an inverter inlet water pressure sensor, an energy storage inverter, an inverter outlet water pressure sensor, an inverter outlet water, a filter screen, a water supplement tank, and an inverter water pump;

[0053] The second inverter medium path comprises, in sequence, an inverter water pump, an inverter three-way ball valve, a radiator, a radiator outlet water temperature sensor, an inverter inlet water temperature sensor, an inverter inlet water pressure sensor, an energy storage inverter, an inverter outlet water pressure sensor, an inverter outlet water, a filter screen, a water supplement tank, and an inverter water pump.

[0054] The battery outlet water pressure sensor is used for detecting the battery side system outlet water pressure, to avoid high pressure from causing the battery side system to leak; the battery outlet water temperature sensor is used for obtaining the battery outlet water temperature; the battery liquid level sensor is used for detecting the battery side system liquid level, to remind the user to add coolant when the liquid level reaches a certain degree; the radiator outlet water temperature sensor is used for obtaining the radiator outlet water temperature; the battery side plate heat exchanger outlet water temperature sensor is used for obtaining the battery side plate heat exchanger outlet water temperature; the battery inlet water temperature sensor is used for obtaining the battery side inlet water temperature; the battery inlet water pressure sensor is used for detecting the system inlet water pressure, to avoid the battery side system from lacking water and causing system components to be damaged; the inverter outlet water pressure sensor is used for detecting the inverter side system outlet water pressure, to avoid high pressure from causing the inverter side system to leak; the inverter outlet water temperature sensor is used for obtaining the inverter outlet water temperature; the inverter liquid level sensor is used for detecting the inverter side system liquid level, to remind the user to add coolant when the liquid level reaches a certain degree; the plate heat exchanger inverter outlet water temperature sensor is used for obtaining the plate heat exchanger inverter side outlet water temperature; the inverter inlet water temperature sensor is used for obtaining the inverter side inlet water temperature; and the inverter inlet water pressure sensor is used for detecting the system inlet water pressure, to avoid the inverter side system from lacking water and causing system components to be damaged.

[0055] In this embodiment 1, on the one hand, two battery cabin medium paths and two inverter medium paths are proposed to solve the problem that the existing constant temperature unit system cannot work normally at low temperature and the PCS cannot cool under high or low temperature; on the other hand, a control method for a constant temperature unit system for energy storage is designed, which can solve the problem of high overall energy consumption of the system by obtaining the inverter target water temperature and the battery cabin target water temperature, and comparing the inverter target water temperature and the battery cabin target water temperature with the radiator outlet water temperature, the inverter outlet water temperature and the battery outlet water temperature respectively to perform corresponding regulation and control.

[0056] The battery cabin medium flows through two paths

[0057] Battery side path one: battery cabin water pump→battery three-way ball valve→plate heat exchanger→plate heat exchanger battery outlet water temperature sensor→heater→battery inlet water temperature sensor→battery inlet water temperature pressure sensor→energy storage battery pack→battery outlet water pressure sensor→battery outlet water temperature sensor→filter→water supplement tank→battery cabin water pump

[0058] Battery side path two: battery cabin water pump→battery three-way ball valve→radiator→radiator outlet water temperature sensor→heater→battery inlet water temperature sensor→battery inlet water pressure sensor→energy storage battery pack→battery outlet water pressure sensor→battery outlet water temperature sensor→filter→water supplement tank→battery cabin water pump

[0059] The energy storage inverter medium flows through two paths

[0060] Energy storage inverter side approach three: inverter compressor refrigeration mode: inverter water pump → inverter three-way ball valve → plate heat exchanger → plate heat exchanger inverter outlet water temperature sensor → inverter inlet water temperature sensor → inverter inlet water pressure sensor → energy storage inverter → inverter outlet water pressure sensor → inverter outlet water → filter screen → water tank → inverter water pump

[0061] Energy storage inverter side approach four: inverter water pump → inverter three-way ball valve → radiator → radiator outlet water temperature sensor → inverter inlet water temperature sensor → inverter inlet water pressure sensor → energy storage inverter → inverter outlet water pressure sensor → inverter outlet water → filter screen → water tank → inverter water pump.

[0062] As a preferred embodiment of the present application, the system further comprises a condenser device,

[0063] The condenser device comprises a condenser, a liquid reservoir, a pressure switch, an electronic expansion valve, a plate heat exchanger, a compressor side pressure sensor, a suction temperature sensor, a gas-liquid separator, an electric compressor and a condenser connected in sequence.

[0064] The condenser device is used to provide condensing function.

[0065] As a preferred embodiment of the present application, the system further comprises a cooling fan, which is used to cool the system.

[0066] The present application also provides a control method of the energy storage constant temperature unit system, which is applied to the energy storage constant temperature unit system and comprises the following steps of,

[0067] Each time the system is started, all ball valves are opened to the intermediate state, and the first battery cabin medium path, the second battery cabin medium path, the first inverter medium path and the second inverter medium path all have medium flowing; the cooling fan is started, and after waiting for a preset time, the following judgment is made,

[0068] The target water temperature of the inverter and the target water temperature of the battery cabin are obtained.

[0069] The opening conditions of the battery cabin water pump and the inverter water pump are judged, and the on-off quantity adjustment of the battery three-way ball valve is made based on the opening conditions of the battery cabin water pump and the inverter water pump.

[0070] Then, if heating is needed, the heating demand of the inverter and the battery is further determined, and the on-off quantity of the three-way ball valve is adjusted by PID algorithm according to the heating demand of the inverter and the battery.

[0071] As a preferred embodiment of the present application, specifically, the opening conditions of the battery cabin water pump and the inverter water pump are judged, and the on-off quantity adjustment of the battery three-way ball valve is made based on the opening conditions of the battery cabin water pump and the inverter water pump, which comprises,

[0072] When only the battery compartment water pump is turned on or only the energy storage inverter water pump is turned on,

[0073] When the inverter target water temperature is less than or equal to the radiator outlet water temperature, the radiator outlet water temperature is greater than or equal to the inverter outlet water temperature, or the battery compartment target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the battery outlet water temperature, the three-way ball valve is fully closed to the radiator side;

[0074] When the inverter target water temperature is greater than or equal to the radiator outlet water temperature, or the battery compartment target water temperature is greater than or equal to the radiator outlet water temperature, the three-way ball valve is fully closed to the plate heat exchanger side;

[0075] When the inverter target water temperature is less than or equal to the radiator outlet water temperature, the radiator outlet water temperature is less than the inverter outlet water temperature, or the battery compartment target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is less than the battery outlet water temperature, the three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the inverter target water temperature or the battery compartment target water temperature through a PID algorithm;

[0076] When the battery compartment water pump and the energy storage inverter water pump are both turned on,

[0077] When the inverter target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the inverter outlet water temperature, the inverter three-way ball valve closes the water path to the radiator; when the battery compartment target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the battery outlet water temperature, the battery compartment three-way ball valve closes the water path to the radiator;

[0078] When the inverter target water temperature is greater than or equal to the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery compartment target water temperature is greater than or equal to the radiator outlet water temperature, the battery compartment three-way ball valve closes the water path to the plate heat exchanger;

[0079] When the inverter target water temperature is greater than or equal to the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery compartment target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is less than the battery outlet water temperature, the battery compartment three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the battery compartment target water temperature through a PID algorithm;

[0080] When the inverter target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the inverter outlet water temperature, the inverter three-way ball valve closes the water path to the radiator; when the battery compartment target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is less than the battery outlet water temperature, the battery compartment three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the battery compartment target water temperature through a PID algorithm;

[0081] When the battery cabin target water temperature is greater than the radiator outlet water temperature, the battery cabin three-way ball valve is closed to the water path to the plate heat exchanger; when the inverter target water temperature is less than the radiator outlet water temperature and the radiator outlet water temperature is less than the inverter outlet water temperature, the inverter three-way ball valve adjusts the switching value of the three-way ball valve according to the inverter target water temperature through a PID algorithm;

[0082] When the battery cabin target water temperature is less than the radiator outlet water temperature and the radiator outlet water temperature is greater than the battery outlet water temperature, the three-way ball valve is completely closed to the radiator side; when the inverter target water temperature is less than the radiator outlet water temperature and the radiator outlet water temperature is less than the inverter outlet water temperature, the inverter three-way ball valve adjusts the switching value of the three-way ball valve according to the inverter target water temperature through a PID algorithm;

[0083] When the battery cabin target water temperature is less than the radiator outlet water temperature and the radiator outlet water temperature is less than the battery outlet water temperature, the battery cabin three-way ball valve adjusts the switching value of the three-way ball valve according to the battery cabin target water temperature through a PID algorithm; when the inverter target water temperature is less than the radiator outlet water temperature and the radiator outlet water temperature is less than the inverter outlet water temperature, the inverter three-way ball valve adjusts the switching value of the three-way ball valve according to the inverter target water temperature through a PID algorithm.

[0084] As a preferred embodiment of the present application, specifically, the switching value of the three-way ball valve is adjusted according to the heating demand of the inverter and the battery through a PID algorithm, comprising,

[0085] When the inverter and the battery both need heating, the inverter three-way ball valve and the battery cabin ball valve are both opened to the radiator side, and the heater is turned on for heating,

[0086] When the inverter needs heating and the battery needs cooling, the inverter three-way ball valve is opened to the radiator side, and the switching value of the battery cabin three-way ball valve is adjusted according to the battery cabin target water temperature through a PID algorithm;

[0087] When the battery cabin needs heating and the inverter needs cooling, the switching value of the battery cabin three-way ball valve is adjusted according to the battery cabin target water temperature through a PID algorithm.

[0088] The above is only a preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A control method of a heat pump system for energy storage, characterized by, Be applied to a kind of energy storage thermostat unit system, the system includes, Two battery cabin medium paths and two inverter medium paths, wherein, The first battery cabin medium path includes battery cabin water pump, battery three-way ball valve, plate heat exchanger, plate heat exchanger battery outlet temperature sensor, heater, battery inlet water temperature sensor, battery inlet water pressure sensor, energy storage battery pack, battery outlet water pressure sensor, battery outlet water temperature sensor, filter, water tank, battery cabin water pump connected in sequence; The second battery cabin medium path includes battery cabin water pump, battery three-way ball valve, radiator, radiator outlet water temperature sensor, heater, battery inlet water temperature sensor, battery inlet water pressure sensor, energy storage battery pack, battery outlet water pressure sensor, battery outlet water temperature sensor, filter, water tank, battery cabin water pump connected in sequence; The first inverter medium path includes inverter water pump, inverter three-way ball valve, plate heat exchanger, inverter outlet water temperature sensor, inverter inlet water temperature sensor, inverter inlet water pressure sensor, energy storage inverter, inverter outlet water pressure sensor, inverter outlet water, filter screen, water tank, inverter water pump connected in sequence; The second inverter medium path includes inverter water pump, inverter three-way ball valve, radiator, radiator outlet water temperature sensor, inverter inlet water temperature sensor, inverter inlet water pressure sensor, energy storage inverter, inverter outlet water pressure sensor, inverter outlet water, filter screen, water tank, inverter water pump connected in sequence; Wherein the radiator outlet water temperature sensor is used to obtain the radiator outlet water temperature, the inverter outlet water temperature sensor is used to obtain the inverter outlet water temperature, and the battery outlet water temperature sensor is used to obtain the battery outlet water temperature; Wherein the battery outlet water pressure sensor is used to detect the battery side system outlet water pressure to avoid high pressure causing the battery side system to leak;The battery outlet water temperature sensor is used to obtain the battery outlet water temperature;The battery liquid level sensor is used to detect the battery side system liquid level, and when the liquid level reaches a certain degree, the user is reminded to add coolant;The radiator outlet water temperature sensor is used to obtain the radiator outlet water temperature;The plate heat exchanger battery outlet water temperature sensor is used to obtain the plate heat exchanger battery outlet water temperature;The battery inlet water temperature sensor is used to obtain the battery inlet water temperature;The battery inlet water pressure sensor is used to detect the system inlet water pressure to avoid the battery side system water shortage causing system components to be damaged;The inverter outlet water pressure sensor is used to detect the inverter side system outlet water pressure to avoid high pressure causing the inverter side system to leak, the inverter outlet water temperature sensor is used to obtain the inverter outlet water temperature, the inverter liquid level sensor is used to detect the inverter side system liquid level, and when the liquid level reaches a certain degree, the user is reminded to add coolant, the plate heat exchanger inverter outlet water temperature sensor is used to obtain the plate heat exchanger inverter outlet water temperature, and the inverter inlet water temperature sensor is used to obtain the inverter inlet water temperature;The inverter inlet water pressure sensor is used to detect the system inlet water pressure to avoid the inverter side system water shortage causing system components to be damaged; The method comprises, When the system is started each time, all ball valves are opened to the intermediate state, the first battery cabin medium path, the second battery cabin medium path, the first inverter medium path and the second inverter medium path all have medium flow; the cooling fan is started, and after waiting for a preset time length, the following judgment is made, The inverter target water temperature and the battery cabin target water temperature are acquired. The opening conditions of the battery cabin water pump and the inverter water pump are judged, and the on-off quantity adjustment of the battery three-way ball valve is made based on the opening conditions of the battery cabin water pump and the inverter water pump. Then, if heating is needed, the heating requirements of the inverter and the battery are further determined, and the on-off quantity of the three-way ball valve is adjusted through the PID algorithm according to the heating requirements of the inverter and the battery. Specifically, the opening conditions of the battery cabin water pump and the inverter water pump are judged, and the on-off quantity adjustment of the battery three-way ball valve is made based on the opening conditions of the battery cabin water pump and the inverter water pump, including, When only the battery cabin water pump or only the energy storage inverter water pump is started, When the inverter target water temperature is less than or equal to the radiator outlet water temperature, the radiator outlet water temperature is greater than or equal to the inverter outlet water temperature, or the battery cabin target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the battery outlet water temperature, all of the three-way ball valve to the radiator side are closed. When the inverter target water temperature is greater than or equal to the radiator outlet water temperature, or the battery cabin target water temperature is greater than or equal to the radiator outlet water temperature, all of the three-way ball valve to the plate heat exchanger side are closed. When the inverter target water temperature is less than the radiator outlet water temperature, the radiator outlet water temperature is less than the inverter outlet water temperature, or the battery cabin target water temperature is less than the radiator outlet water temperature, the radiator outlet water temperature is less than the battery outlet water temperature, the three-way ball valve adjusts the on-off quantity of the three-way ball valve according to the inverter target water temperature or the battery cabin target water temperature through the PID algorithm. When the battery cabin water pump and the energy storage inverter water pump are both started, When the inverter target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the inverter outlet water temperature, the inverter three-way ball valve closes the water path to the radiator; when the battery cabin target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the battery outlet water temperature, the battery cabin three-way ball valve closes the water path to the radiator. When the inverter target water temperature is greater than or equal to the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is greater than or equal to the radiator outlet water temperature, the battery cabin three-way ball valve closes the water path to the plate heat exchanger. When the inverter target water temperature is greater than or equal to the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery cabin target water temperature is less than the radiator outlet water temperature, and the radiator outlet water temperature is less than the battery outlet water temperature, the battery cabin three-way ball valve adjusts the on-off quantity of the three-way ball valve according to the battery cabin target water temperature through the PID algorithm. When the inverter target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is greater than or equal to the inverter outlet water temperature, the inverter three-way ball valve closes the water path to the radiator; when the battery cabin target water temperature is less than or equal to the radiator outlet water temperature, and the radiator outlet water temperature is less than the battery outlet water temperature, the battery cabin three-way ball valve adjusts the on-off quantity of the three-way ball valve according to the battery cabin target water temperature through the PID algorithm. When the battery cabin target water temperature is greater than or equal to the radiator outlet water temperature, the battery cabin three-way ball valve is closed to the water path of the plate heat exchanger; when the inverter target water temperature is less than the radiator outlet water temperature and the radiator outlet water temperature is less than the inverter outlet water temperature, the inverter three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the inverter target water temperature through a PID algorithm; When the battery cabin target water temperature is less than or equal to the radiator outlet water temperature and the radiator outlet water temperature is greater than the battery outlet water temperature, the three-way ball valve is completely closed to the radiator side; when the inverter target water temperature is less than or equal to the radiator outlet water temperature and the radiator outlet water temperature is less than the inverter outlet water temperature, the inverter three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the inverter target water temperature through a PID algorithm; When the battery cabin target water temperature is less than or equal to the radiator outlet water temperature and the radiator outlet water temperature is less than the battery outlet water temperature, the battery cabin three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the battery cabin target water temperature through a PID algorithm; when the inverter target water temperature is less than or equal to the radiator outlet water temperature and the radiator outlet water temperature is less than the inverter outlet water temperature, the inverter three-way ball valve adjusts the opening and closing amount of the three-way ball valve according to the inverter target water temperature through a PID algorithm.

2. The control method of a thermostatic unit system for energy storage according to claim 1, characterized by, Specifically, the opening and closing amount of the three-way ball valve is adjusted according to the heating demand of the inverter and the battery through a PID algorithm, including, When the inverter and the battery both need heating, the inverter three-way ball valve and the battery cabin ball valve are both opened to the radiator side, and the heater is turned on for heating, When the inverter needs heating and the battery needs cooling, the inverter three-way ball valve is opened to the radiator side, and the opening and closing amount of the battery cabin three-way ball valve is adjusted according to the battery cabin target water temperature through a PID algorithm; When the battery cabin needs heating and the inverter needs cooling, the opening and closing amount of the battery cabin three-way ball valve is adjusted according to the battery cabin target water temperature through a PID algorithm.

3. The control method of a thermostatic unit system for energy storage according to claim 1, characterized by, The system further comprises a condenser device, The condenser device comprises, in sequence, a condenser, a liquid accumulator, a pressure switch, an electronic expansion valve, a plate heat exchanger, a compressor-side pressure sensor, a suction temperature sensor, a gas-liquid separator, an electric compressor, and a condenser. The condenser device is used to provide condensing function.

4. The control method of a thermostatic unit system for energy storage according to claim 1, characterized by, The system further comprises a cooling fan, which is used to cool the system.

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