Thermal management energy storage system

Abstract

The utility model discloses a thermal management energy storage system, which belongs to the technical field of heat dissipation of energy storage batteries and inverters and comprises a liquid cooling energy storage battery system and a refrigerating system, the refrigerating system is respectively connected with the liquid cooling energy storage battery system and the liquid cooling inverter system, and the liquid cooling inverter system is connected with the liquid cooling energy storage battery system. The thermal management module is used for performing thermal management on the liquid-cooled energy storage battery system and the liquid-cooled inverter system; in a first working condition, the liquid cooling energy storage battery system and the liquid cooling inverter system respectively carry out temperature regulation and control on a battery pack and an inverter through the refrigerating system; and in the second working condition, the liquid-cooled inverter system transfers the carried heat to the liquid-cooled inverter system to regulate and control the temperature of the battery pack. The liquid cooling energy storage battery system and the liquid cooling inverter system are jointly subjected to heat management by utilizing the characteristics of the evaporator and the condenser of the refrigerating system, so that different requirements of batteries in the energy storage battery pack and power devices IGBT in the inverter on the liquid supply temperature can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of energy storage batteries and inverters, and in particular to a thermal management energy storage system. Background Art

[0002] In recent years, energy storage technology based on "battery + power electronics technology" has developed rapidly. With the rapid development of wind power and photovoltaic industries, energy storage has largely solved the problems of randomness and volatility of renewable energy generation, and played the role of "filling the peak with the valley". The performance of energy storage depends to a large extent on the performance of the battery. Energy storage batteries apply electrochemical principles. When charging and discharging, chemical energy is directly converted into electrical energy. Heat will be generated during this reaction. The best working temperature of the battery is between 25℃-35℃. The battery is greatly affected by temperature. The battery will have safety hazards at too high or too low temperatures. Therefore, it is particularly important to manage the thermal power of the battery in the energy storage industry. Since the inverter is the core component of the energy storage system, as the charge and discharge rate of the energy storage system increases, the heat dissipation power consumption of the inverter is also increasing. Timely and effective removal of the heat dissipation power consumption of the inverter is to ensure the reliable and stable operation of the inverter in advance.

[0003] At present, the energy storage industry usually adopts two methods for battery thermal management: air cooling and liquid cooling. The air-cooled thermal management system is generally used in battery environments with small areas. The liquid-cooled thermal management system uses heat exchange between the battery module and the ethylene glycol aqueous solution in the liquid cooling plate to reduce the temperature of the battery module. The inverter usually adopts an air-cooled heat dissipation structure. As the power of the inverter increases, the heat dissipation power consumption also increases, and air-cooled heat exchange cannot meet the requirements. Utility Model Content

[0004] In order to solve the problems of the prior art, the utility model provides a thermal management energy storage system, including: a liquid-cooled energy storage battery system, used to adjust the working environment temperature of the energy storage battery;

[0005] Liquid-cooled inverter system, used to adjust the working environment temperature of the inverter;

[0006] A refrigeration system, the refrigeration system includes a refrigeration side and a heat exchange side, the refrigeration side circulates refrigeration in the refrigeration system, and the heat exchange side is connected to the liquid-cooled energy storage battery system and the liquid-cooled inverter system respectively, for heat exchange between the liquid-cooled energy storage battery system and the liquid-cooled inverter system to achieve thermal management

[0007] Further, the refrigeration system includes an evaporative heat exchanger and a condensing heat exchanger;

[0008] The refrigeration sides of the evaporation heat exchanger and the condensation heat exchanger are connected to each other through a pipeline to form a refrigeration circuit;

[0009] A compressor and an expansion valve are installed on the pipeline of the refrigeration circuit. The compressor provides power for the flow of the refrigerant medium in the refrigeration circuit; the expansion valve is used to reduce the condensation pressure of the refrigerant medium condensed by the condensing heat exchanger to the evaporation pressure;

[0010] The heat exchange sides of the evaporative heat exchanger and the condensing heat exchanger are connected to the liquid-cooled energy storage battery system and the liquid-cooled inverter system respectively.

[0011] Further, the liquid-cooled energy storage battery system comprises: a heater, an energy storage water pump and an energy storage battery pack connected in sequence through pipelines;

[0012] A first temperature sensor, a first pressure sensor and a first flow sensor are installed on the pipeline located at the liquid inlet of the energy storage battery pack;

[0013] A branch pipeline is provided on the pipeline between the heater and the energy storage water pump, and the branch pipeline is connected to the first expansion water tank;

[0014] The outlet end of the heat exchange side of the evaporative heat exchanger is connected to the liquid inlet of the heater through a pipeline, and the inlet end of the heat exchange side of the evaporative heat exchanger is connected to the liquid outlet of the energy storage battery pack through a pipeline.

[0015] Further, the liquid-cooled energy storage battery system and the liquid-cooled inverter system are connected via a first bypass branch;

[0016] The first bypass branch is used to connect the liquid cooling medium after heat exchange of the inverter to the pipeline between the heat exchange side of the evaporative heat exchanger and the heater under the second working condition.

[0017] Further, the liquid-cooled inverter system comprises: an inverter water pump, an inverter and a condensing radiator connected in sequence through pipelines;

[0018] A second pressure sensor, a second temperature sensor and a second flow sensor are installed on the pipeline located at the liquid inlet of the PCS;

[0019] The inlet end of the heat exchange side of the condensing heat exchanger is connected to the liquid outlet pipeline of the condensing radiator, and the outlet end of the heat exchange side of the condensing heat exchanger is connected to the liquid inlet of the inverter water pump through a pipeline.

[0020] Further, the liquid-cooled energy storage battery system and the liquid-cooled inverter system are connected via a second bypass branch;

[0021] The second bypass branch is used to connect the liquid cooling medium after heat exchange of the energy storage battery pack to the pipeline between the inverter and the condensing radiator.

[0022] Furthermore, a branch pipe is provided on the pipeline between the inverter and the condensing radiator, the branch pipe is connected to the second bypass branch, and a proportional electric valve is provided on the branch pipe.

[0023] Furthermore, the liquid-cooled energy storage battery system and / or the liquid-cooled inverter system further comprises an expansion water tank, the liquid outlet of the expansion water tank being connected to a pipeline of the liquid-cooled energy storage battery system or the liquid-cooled inverter system for replenishing liquid cooling medium;

[0024] The liquid-cooled energy storage battery system and / or the liquid-cooled inverter system further comprises a filter, wherein the filter is installed on a pipeline close to an inlet end of a heat exchange side of the refrigeration system;

[0025] Solenoid valves are provided at the connecting points of the pipelines of the liquid-cooled energy storage battery system, the liquid-cooled inverter system and the refrigeration system.

[0026] Furthermore, a drying filter is provided on the pipeline between the expansion valve and the condensing heat exchanger.

[0027] Furthermore, the condensing radiator is a fin-tube heat exchanger, and a fan facing the condensing radiator is arranged on one side.

[0028] Beneficial effects of the utility model:

[0029] By utilizing the characteristics of the evaporator and condenser of the refrigeration system and jointly managing the thermal performance of the liquid-cooled energy storage battery system and the liquid-cooled inverter system, the different requirements of the batteries in the energy storage battery pack and the power devices IGBT in the inverter for the liquid supply temperature can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the connection of various components provided by the utility model.

[0032] Figure numerals: 11 is a compressor, 12 is an evaporative heat exchanger, 13 is an expansion valve, 14 is a condensing heat exchanger, 15 is a drying filter, 21 is an energy storage water pump, 22 is a first flow sensor, 23 is a first temperature sensor, 24 is a first pressure sensor, 25 is an energy storage battery pack, 26 is a first filter, 27 is a heater, 28 is a first expansion water tank, 27 is a heater, 31 is a PCS, 32 is an inverter water pump, 33 is a second flow sensor, 34 is a second temperature sensor, 35 is a second pressure sensor, 36 is a second filter, 37 is a condensing radiator, 38 is a fan, 39 is a second expansion water tank, 40 is a proportional electric valve, 41 is a second solenoid valve, 42 is a first solenoid valve, 43 is a fourth solenoid valve, and 44 is a third solenoid valve. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1 , a thermal management energy storage system, comprising: a liquid-cooled energy storage battery system for regulating the working environment temperature of the battery pack;

[0035] Liquid-cooled inverter system, used to adjust the working environment temperature of the inverter;

[0036] A refrigeration system, the refrigeration system is connected to the liquid-cooled energy storage battery system and the liquid-cooled inverter system respectively, and is used to perform thermal management on the liquid-cooled energy storage battery system and the liquid-cooled inverter system;

[0037] In the first working condition, the liquid-cooled energy storage battery system and the liquid-cooled inverter system respectively control the temperature of the battery pack and the inverter through the refrigeration system;

[0038] The first working condition is that when the ambient temperature of the inverter and the battery pack is high (for example, in summer, when the ambient temperature is greater than 10°C), the refrigeration system is used to cool the inverter and the battery pack respectively;

[0039] When the ambient temperature is between 0-10℃, the inverter and battery pack can be cooled by conventional heat dissipation methods, that is, the coolant in the pipeline flows naturally through the battery pack and inverter, and the heat dissipation of the coolant relies on heat exchange between the pipeline and the outside world to achieve cooling. The refrigeration system is not started during this process, which can achieve energy-saving effects;

[0040] In the second working condition, the liquid-cooled inverter system transfers the heat to the liquid-cooled inverter system to control the temperature of the battery pack;

[0041] The second operating condition is when the ambient temperature of the inverter and the battery pack is low (for example, in winter, when the ambient temperature is below 0°C). When the temperature is low, the battery pack cannot meet the charging and discharging requirements. The heat of the inverter can be transferred to the battery pack to heat the battery pack, which can achieve both heat dissipation of the inverter and heating of the battery pack.

[0042] Wherein, the liquid-cooled energy storage battery system and / or the liquid-cooled inverter system further comprises an expansion water tank, and a liquid outlet of the expansion water tank is connected to a pipeline of the liquid-cooled energy storage battery system or the liquid-cooled inverter system for replenishing liquid cooling medium;

[0043] The liquid-cooled energy storage battery system and / or the liquid-cooled inverter system further comprises a filter, wherein the filter is installed on a pipeline close to an inlet end of a heat exchange side of the refrigeration system;

[0044] Solenoid valves are provided at the connecting points of the pipelines of the liquid-cooled energy storage battery system, the liquid-cooled inverter system and the refrigeration system.

[0045] In some embodiments, the liquid-cooled energy storage battery system includes: a circuit consisting of a first solenoid valve 42, a heater 27, an energy storage water pump 21, a first temperature sensor 23, a first pressure sensor 24, a first flow sensor 22, an energy storage battery pack 25, a first filter 26, a second solenoid valve 41 and a condensing radiator 37 connected in sequence through a pipeline;

[0046] A branch pipeline is provided on the pipeline between the heater 27 and the energy storage water pump 21, and the branch pipeline is connected to the first expansion water tank 28;

[0047] One end of the refrigeration system is connected to the pipeline between the condensation radiator 37 and the first solenoid valve 42, and the other end of the refrigeration system is connected to the pipeline between the condensation radiator 37 and the first solenoid valve 41; the condensation radiator 37 is a fin-tube heat exchanger; a fan 38 is provided on one side of the condensation radiator 37;

[0048] A first filter 26 is provided on the pipeline between the first solenoid valve 41 and the energy storage battery pack 25 .

[0049] In some embodiments, the liquid-cooled inverter system includes: an inverter water pump 32, a second pressure sensor 35, a second temperature sensor 34, a second flow sensor 33, a PCS (inverter) 31, and a third solenoid valve 44, which are sequentially connected through pipelines;

[0050] The third solenoid valve 44 is also connected to the condensation radiator 37 by pipeline;

[0051] One end of the refrigeration system is also connected to the condenser radiator 37 by pipeline, and the other end of the refrigeration system is also connected to the inverter water pump 32 by pipeline;

[0052] A fourth solenoid valve 43 is provided on the pipeline between the condensing radiator 37 and the refrigeration system; a second expansion water tank 39 is provided on the pipeline between the inverter water pump 32 and the refrigeration system; and a second filter 36 is provided on the pipeline between the fourth solenoid valve 43 and the refrigeration system.

[0053] In some embodiments, the liquid-cooled energy storage battery system and the liquid-cooled inverter system are connected via a first bypass branch;

[0054] The first bypass branch is used to connect the liquid cooling medium after heat exchange of the inverter to the pipeline between the heat exchange side of the evaporative heat exchanger 12 and the heater 27 under the second working condition;

[0055] The liquid-cooled energy storage battery system and the liquid-cooled inverter system are connected via a second bypass branch;

[0056] The second bypass branch is used to connect the liquid cooling medium after heat exchange of the energy storage battery pack to the pipeline between the inverter 31 and the condensation radiator 37.

[0057] The third solenoid valve 44 is connected to the second solenoid valve 41 via a pipeline, and the fourth solenoid valve 43 is connected to the first solenoid valve 42 via a pipeline (ie, a first bypass branch).

[0058] A branch pipeline is provided on the pipeline between the inverter 31 and the condensing radiator 37, the branch pipeline is connected to the second bypass branch, and a proportional electric valve 40 is provided on the branch pipeline;

[0059] That is, a branch pipe is provided on the pipeline between the third solenoid valve 44 and the PCS (inverter) 31 , and the branch pipe is connected to the pipeline between the third solenoid valve 44 and the first solenoid valve 41 (ie, the second bypass branch).

[0060] In some embodiments, the refrigeration system includes: a circuit consisting of a compressor 11, a condensing heat exchanger 14, an expansion valve 13, and an evaporating heat exchanger 12 connected in sequence through pipelines;

[0061] The two ends of the condensing heat exchanger 14 are respectively connected to the fourth solenoid valve 43 and the inverter water pump 32 by pipelines;

[0062] The second filter 36 is located on the pipeline between the fourth solenoid valve 43 and the condensing heat exchanger 14 ; the second expansion water tank 39 is located on the pipeline between the condensing heat exchanger 14 and the inverter water pump 32 .

[0063] A drying filter 15 is provided on the pipeline between the expansion valve 13 and the condensing heat exchanger 14 .

[0064] Among them, the liquid-cooled energy storage battery system has an optimal working temperature of 25°C to 35°C. By adjusting the evaporation temperature of the evaporative heat exchanger in the refrigeration system, the ethylene glycol aqueous solution of the liquid-cooled energy storage battery system exchanges heat in the evaporative heat exchanger, which can provide the liquid-cooled energy storage battery system with an ethylene glycol aqueous solution with a temperature range of 18°C ​​to 30°C, which can meet the optimal working temperature of the battery.

[0065] In the liquid-cooled inverter system, the maximum operating temperature of the power device IGBT in the inverter can reach about 80°C. By adjusting the condensing temperature of the condensing heat exchanger in the refrigeration system, the ethylene glycol aqueous solution of the liquid-cooled energy storage battery system exchanges heat in the evaporative heat exchanger, which can provide the liquid-cooled inverter system with an ethylene glycol aqueous solution with a temperature range of about 60°C, which can meet the operating temperature of high-power devices.

[0066] In the refrigeration system, by adjusting the plate heat exchanger on the evaporation side, the heat exchange temperature difference can be met and the battery temperature can be kept within the optimal temperature range. By adjusting the plate heat exchanger on the condensation side, an ethylene glycol aqueous solution at about 60°C is provided to the inverter high-power devices to meet the heat dissipation requirements of the high-power devices. Joint thermal management can be carried out. At the same time, a joint thermal management system is adopted. A water-cooled plate heat exchanger is used on the condenser side to reduce the penetration of Freon into the cabin. The fluorine side system is only in the cabin system, which reduces the difficulty of on-site vacuuming and Freon adding processes.

[0067] The refrigeration system provides a low-temperature ethylene glycol aqueous solution to the liquid-cooled energy storage battery system and a high-temperature ethylene glycol aqueous solution to the liquid-cooled inverter system;

[0068] The liquid-cooled energy storage battery pack system adopts liquid cooling to cool the battery cells;

[0069] The liquid-cooled inverter system uses liquid cooling to cool the heat dissipation device;

[0070] The liquid-cooled inverter system condenser (heat exchanger) adopts a variable frequency fan to force air cooling and heat exchange, and the radiator is a copper tube fin radiator.

[0071] See also Figure 1, compressor 11 provides power for the refrigeration system, evaporative heat exchanger 12, in the plate heat exchanger, the fluorine refrigeration system side absorbs the heat of the ethylene glycol aqueous solution flowing through the evaporator and evaporates, the ethylene glycol aqueous solution on the water side releases heat, the expansion valve 13 reduces the condensation pressure to the evaporation pressure, and adjusts the evaporator refrigerant flow at the same time, the condensation heat exchanger 14 condenses the refrigerant through the condensation of the refrigerant, and discharges the condensation heat load to the outside air, and the drying filter 15 set on the pipeline between the expansion valve and the condensation heat exchanger absorbs the residual moisture in the refrigeration system to prevent ice and blockage. Through this refrigeration system, the ethylene glycol aqueous solution at 18℃ to 30℃ is provided for the liquid-cooled energy storage battery pack system to meet the optimal temperature range of the battery.

[0072] Example 1

[0073] When the ambient temperature is high (greater than 10°C):

[0074] The energy storage battery pack 25 adopts liquid cooling, the energy storage water pump 21 provides circulation power for the ethylene glycol aqueous solution system, the first flow sensor 22 detects the flow of the energy storage battery pack circuit, the first temperature sensor 23 detects the temperature of the energy storage battery pack circuit, and the first pressure sensor 24 detects the pressure of the energy storage battery pack circuit. By monitoring and uploading the flow, temperature and pressure, the temperature of the battery can be guaranteed. When the monitoring circuit flow, temperature and pressure are abnormal, they can be processed in time. The filter 26 provides clean coolant for the equipment to effectively control the contaminants of the medium. The heater 27 is used to heat the ethylene glycol aqueous solution when the battery pack is at a low temperature and does not meet the charging and discharging requirements in a low temperature environment. The first expansion water tank 28, on the one hand, buffers the pressure of the liquid supply system, and on the other hand, replenishes the system with liquid through the expansion water tank.

[0075] The liquid-cooled inverter 31 adopts liquid cooling, the inverter water pump 32 provides circulation power for the ethylene glycol aqueous solution system, the second flow sensor 32 detects the flow of the liquid-cooled inverter circuit, the second temperature sensor 34 detects the temperature of the inverter circuit, and the second pressure sensor 35 detects the pressure of the inverter circuit. By monitoring and uploading the flow, temperature and pressure, the temperature of the inverter can be guaranteed. When the monitoring circuit flow, temperature and pressure are abnormal, they can be processed in time. The filter 36 provides clean coolant for the equipment and effectively controls the pollutants in the medium. The copper tube fin heat exchanger 37 dissipates the heat of the power device of the liquid-cooled inverter on the one hand, and dissipates the heat of the energy storage battery on the other hand. In this way, only one water system is needed to heat exchange the heat of the energy storage battery system and the inverter system, reducing the difficulty of the process of vacuuming and adding Freon. The heat dissipation fan 38 exchanges the heat of the copper tube fin heat exchanger with the external environment through forced air cooling. The expansion water tank 39 buffers the pressure of the liquid supply system on the one hand, and replenishes the system with liquid through the expansion water tank on the other hand. This design combines the condenser of the refrigeration system with the liquid-cooled inverter radiator. Only one variable-frequency fan is needed for forced heat exchange, thus reducing the number of fans. This improves the energy conversion efficiency of the entire system and plays a role in joint thermal management.

[0076] Example 2

[0077] When the ambient temperature is lower than 10℃ and higher than 0℃, conventional heat dissipation is used:

[0078] During the inverter cooling process, the inverter water pump 32 is started, and the coolant flows out of the condensing heat exchanger 14 and passes through the second pressure sensor 35, the second temperature sensor 34, the second flow sensor 33 and the inverter 31 in sequence, and then flows through the third solenoid valve 44 and enters the condensing radiator 37. The coolant lowers the inverter temperature, the variable frequency fan cools the condensing radiator 37, and then the coolant flows into the condensing heat exchanger 14.

[0079] During the cooling process of the energy storage battery pack, the energy storage water pump 21 is started, and the coolant flows out of the evaporative heat exchanger 12, passes through the first temperature sensor 23, the first pressure sensor 24, the first flow sensor 22, the energy storage battery pack 25, the second solenoid valve 41, the fourth solenoid valve 44, the condensing radiator 37 and the fourth solenoid valve 43 in sequence, and finally returns to the evaporative heat exchanger 12.

[0080] Example 3

[0081] When the ambient temperature is low (below 0°C):

[0082] The liquid-cooled inverter 31 adopts liquid cooling (see the temperature control process in Example 1); when the temperature of the battery cell is lower than 0°C before the energy storage battery pack is charged or discharged, the inverter 31 is first started to heat the battery cell of the energy storage battery pack 25. The proportional electric valve 40 can adjust the liquid supply flow entering the energy storage battery pack according to the heat generation of the battery cell. After the inverter water pump 32 is pressurized, the flow is adjusted by the proportional electric valve 40, and after passing through the second solenoid valve 41, the energy storage battery pack 25 is heated, and then passes through the first solenoid valve 42 and the fourth solenoid valve 43, and then returns to the inverter water pump 32. This design combines the heat dissipation of the inverter with the heating of the energy storage battery pack, which improves the energy conversion efficiency of the entire system and plays a role in joint thermal management.

[0083] In order to change the direction of the water pump, a frequency converter can be connected to the water pump. The frequency converter is a device that adjusts the speed of the motor. The speed of the motor can be controlled by adjusting the output frequency. When the water pump is connected to the frequency converter, the forward or reverse rotation of the water pump can be achieved by controlling the input signal of the frequency converter. The specific operation can be achieved by setting the parameters or control signals of the frequency converter to achieve the purpose of regulating the direction of the water pump. The realization of this function enables the water pump to meet the needs of different working conditions more flexibly and conveniently in actual applications.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal management energy storage system, characterized in that: include: Liquid-cooled energy storage battery system, used to adjust the working environment temperature of the energy storage battery; The liquid-cooled energy storage battery system comprises: a heater (27), an energy storage water pump (21) and an energy storage battery pack (25) which are sequentially connected via pipelines; Liquid-cooled inverter system, used to adjust the working environment temperature of the inverter; A refrigeration system, the refrigeration system comprising a refrigeration side and a heat exchange side, the refrigeration side circulates refrigeration in the refrigeration system, and the heat exchange side is respectively connected to the liquid-cooled energy storage battery system and the liquid-cooled inverter system, and is used to perform heat exchange on the liquid-cooled energy storage battery system and the liquid-cooled inverter system to achieve thermal management; The refrigeration system comprises an evaporative heat exchanger (12) and a condensing heat exchanger (14); the refrigeration sides of the evaporative heat exchanger (12) and the condensing heat exchanger (14) are interconnected via a pipeline to form a refrigeration circuit; the heat exchange sides of the evaporative heat exchanger (12) and the condensing heat exchanger (14) are respectively connected to the liquid-cooled energy storage battery system and the liquid-cooled inverter system; The outlet end of the heat exchange side of the evaporative heat exchanger (12) is connected to the liquid inlet of the heater (27) via a pipeline, and the inlet end of the heat exchange side of the evaporative heat exchanger (12) is connected to the liquid outlet of the energy storage battery pack (25) via a pipeline; A first temperature sensor (23), a first pressure sensor (24) and a first flow sensor (22) are installed on the pipeline located at the liquid inlet of the energy storage battery pack (25); A branch pipeline is provided on the pipeline between the heater (27) and the energy storage water pump (21), and the branch pipeline is connected to the first expansion water tank (28).

2. The thermal management energy storage system according to claim 1, characterized in that: A compressor (11) and an expansion valve (13) are installed on the pipeline of the refrigeration circuit. The compressor (11) provides power for the flow of the refrigerant medium in the refrigeration circuit; the expansion valve (13) is used to reduce the condensation pressure of the refrigerant medium condensed by the condensing heat exchanger (14) to the evaporation pressure.

3. The thermal management energy storage system according to claim 1, characterized in that: The liquid-cooled energy storage battery system and the liquid-cooled inverter system are connected via a first bypass branch; The first bypass branch is used to connect the liquid cooling medium after heat exchange in the inverter to the pipeline between the heat exchange side of the evaporative heat exchanger (12) and the heater (27) under the second working condition.

4. The thermal management energy storage system according to claim 3, characterized in that: The liquid-cooled inverter system comprises: an inverter water pump (32), an inverter (31) and a condensing radiator (37) which are sequentially connected via pipelines; A second pressure sensor (35), a second temperature sensor (34) and a second flow sensor (33) are installed on the pipeline located at the liquid inlet of the inverter (31); The inlet end of the heat exchange side of the condensing heat exchanger (14) is connected to the liquid outlet pipeline of the condensing radiator (37), and the outlet end of the heat exchange side of the condensing heat exchanger (14) is connected to the liquid inlet of the inverter water pump (32) through a pipeline.

5. The thermal management energy storage system according to claim 4, characterized in that: The liquid-cooled energy storage battery system and the liquid-cooled inverter system are connected via a second bypass branch; The second bypass branch is used to connect the liquid cooling medium after heat exchange of the energy storage battery pack to the pipeline between the inverter (31) and the condensing radiator (37).

6. The thermal management energy storage system according to claim 5, characterized in that: A branch pipeline is provided on the pipeline between the inverter (31) and the condensing radiator (37), the branch pipeline is connected to the second bypass branch, and a proportional electric valve (40) is provided on the branch pipeline.

7. The thermal management energy storage system according to claim 1, characterized in that: The liquid-cooled energy storage battery system and / or the liquid-cooled inverter system further comprises an expansion water tank, the liquid outlet of the expansion water tank being connected to a pipeline of the liquid-cooled energy storage battery system or the liquid-cooled inverter system for replenishing liquid cooling medium; The liquid-cooled energy storage battery system and / or the liquid-cooled inverter system further comprises a filter, wherein the filter is installed on a pipeline close to an inlet end of a heat exchange side of the refrigeration system; Solenoid valves are provided at the connecting points of the pipelines of the liquid-cooled energy storage battery system, the liquid-cooled inverter system and the refrigeration system.

8. The thermal management energy storage system according to claim 2, characterized in that: A drying filter (15) is provided on the pipeline between the expansion valve (13) and the condensing heat exchanger (14).

9. The thermal management energy storage system according to claim 4, characterized in that: The condensing radiator (37) is a fin-tube heat exchanger; A fan (38) is disposed opposite to one side of the condensation radiator (37).

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