Energy storage heat management and safety system, energy storage device and new energy automobile

Abstract

The invention discloses an energy storage heat management and safety system, an energy storage device and a new energy automobile, the energy storage heat management and safety system comprises a safety unit, a heat management unit, a control unit and a battery unit, the safety unit and the heat management unit are respectively connected with the battery unit, and the safety unit and the heat management unit are respectively connected with the control unit. The thermal management unit is used for controlling the battery unit to be in a set working temperature range, the safety unit is used for taking away heat when the battery unit is in thermal runaway, the control unit is used for controlling the safety unit and the thermal management unit to work according to the working condition of the battery unit, and the energy storage device comprises the energy storage thermal management and safety system. The new energy automobile comprises the energy storage device.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to an energy storage thermal management and safety system, an energy storage device and a new energy vehicle. Background Art

[0002] New energy storage technologies are widely used in the fields of new energy vehicles and new energy storage. When batteries are working, they are sensitive to temperature. If the temperature is too low, the reaction rate of the electrode will also decrease; if the temperature is too high, it will destroy the chemical balance in the battery, leading to side reactions, shortening the battery life, and may even cause a short circuit in the internal circuit and cause a fire; to ensure that the battery is at the optimal operating temperature, it is usually achieved through battery thermal management. On the one hand, battery thermal management is to heat and keep the battery warm when the battery temperature is lower than the set temperature; on the other hand, battery thermal management is to cool the battery.

[0003] At present, there are two main types of battery thermal management for new energy storage technologies: one is air cooling technology, which uses a blower to blow air into the heat dissipation duct to take away the heat generated by the battery during operation to reduce the battery operating temperature. The other is water cooling technology, which uses a water pump to pump cold water to a water-cooled heat exchanger, and the cold water takes away the heat generated by the battery during operation to reduce the battery operating temperature.

[0004] The safety issues of new energy storage devices cannot be ignored. Once the battery temperature is too high or a battery in the battery pack short-circuits, it will immediately cause a fire or even an explosion, causing immeasurable losses to personal safety and equipment safety. The current safety technologies mainly include: (1) Battery material safety technology. First, the positive electrode material is improved in stability by doping and encapsulating, or replacing metal molecules; second, the negative electrode is encapsulated, or new negative electrode materials are used to improve safety; third, flame retardants are added to the electrolyte, or liquid electrolytes are replaced with solid polymer electrolytes, and ionic liquids and electrolyte salts are used to replace other methods to improve the thermal safety characteristics of the electrolyte; (2) Three-dimensional insulation wall technology, a composite material composed of three materials, namely, a silicone polymer, a low-density insulation material, and a flame retardant material, is filled between the battery cells. Composite materials: silicone polymers are mainly heat-conducting materials that conduct heat generated by the battery cells to the outside of the battery. Low-density thermal insulation materials are used for thermal insulation to reduce thermal runaway caused by uneven heat dissipation between battery cells. Flame-retardant materials prevent combustion, further improving battery safety. (3) Immersion safety technology: The working condition of the battery pack is determined by the temperature and voltage drop. When a thermal runaway condition is likely to occur, the solenoid valve connected to the fire hose is opened, and a large amount of fire hose quickly flows into the battery stack, quickly taking away the heat generated by the battery stack and avoiding further thermal chain reactions in the battery, thereby ensuring battery safety.

[0005] However, the above-mentioned new energy storage devices (1) have relatively high material costs and are difficult to process; (2) the disadvantages of the three-dimensional insulation wall technology are that it is difficult to process and has high costs; and (3) the disadvantage of the immersion safety technology is that once a safety problem occurs, the entire battery pack will be completely scrapped and may also damage the entire battery system, resulting in huge losses. Summary of the invention

[0006] The purpose of the present invention is to provide an energy storage thermal management and safety system, an energy storage device and a new energy vehicle that combine a thermal management unit and a safety unit, can control the temperature of a battery cell, and can effectively reduce losses when thermal runaway occurs.

[0007] The present invention provides an energy storage thermal management and safety system, comprising a safety unit, a thermal management unit, a control unit and a battery unit, wherein the safety unit and the thermal management unit are respectively connected to the battery unit, and the safety unit and the thermal management unit are respectively connected to the control unit, the thermal management unit is used to control the battery unit to be within a set operating temperature range, the safety unit is used to take away heat when thermal runaway occurs in the battery unit, and the control unit is used to control the safety unit and the thermal management unit to work according to the working condition of the battery unit.

[0008] Furthermore, the safety unit includes a refrigerant storage tank, a pipe connected to the refrigerant storage tank and the battery unit, and a solenoid valve installed on the pipe and connected to the control unit. The battery unit includes a battery case and a battery module located in the battery case. One end of the pipe connected to the battery unit is provided with a pipe port, and the pipe port is located in the battery case and is arranged toward the battery module. The safety unit also includes a temperature sensor, which is arranged in the battery case and connected to the control unit. The temperature sensor is used to sense the temperature information of the battery module in real time and transmit the information back to the control unit.

[0009] Furthermore, the safety unit also includes a smoke sensor, which is arranged in the battery box and connected to the control unit. The smoke sensor is used to sense the smoke information in the battery box in real time and transmit the information back to the control unit.

[0010] Furthermore, the safety unit further comprises a fusible plug, which is arranged in the battery box and located on a side of the solenoid valve away from the pipeline opening.

[0011] Furthermore, the thermal management unit includes a refrigeration compressor, a four-way valve, a condenser, a dry filter liquid reservoir, a throttle valve and an evaporator, the refrigeration compressor is connected to the four-way valve, two of the four ports of the four-way valve are respectively connected to the liquid inlet and liquid outlet of the condenser, and the other two ports are respectively connected to the two ends of the liquid collecting pipe of the evaporator, and the two ends of the dry filter liquid reservoir are respectively connected to the liquid collecting pipes of the condenser and the evaporator.

[0012] Furthermore, the thermal management unit has a refrigeration circuit and a heating circuit, and a throttle valve is also provided between the drying filter reservoir and the liquid collecting pipe of the evaporator on the refrigeration circuit.

[0013] Furthermore, the evaporator is located in the battery module box and is arranged on the periphery of the battery module.

[0014] Furthermore, the control unit includes a main controller and an intelligent control module. The intelligent control module detects the working condition of the battery unit according to the safety unit and feeds back the detection result to the intelligent control module. The intelligent control module controls the thermal management unit to adjust the working condition of the battery unit. When the working condition of the battery unit is abnormal, the intelligent control module feeds back information to the main controller, and the main controller controls the battery unit to stop working.

[0015] An energy storage device comprises the above-mentioned energy storage thermal management and safety system.

[0016] A new energy vehicle comprises the above energy storage device.

[0017] The energy storage thermal management and safety system, energy storage device and new energy vehicle provided by the present invention can realize the temperature control of the battery cell and control the battery cell in thermal runaway when thermal runaway occurs by combining the control unit, the thermal management unit and the safety unit. The energy storage thermal management and safety system, energy storage device and new energy vehicle provided by the present invention do not require expensive material costs, and also avoid the problem of increased costs due to difficult processing. It can also effectively avoid the entire energy storage thermal management and safety system, energy storage device, and new energy vehicle from causing huge damage due to immersion protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the energy storage thermal management and safety system of the present invention.

[0019] Figure 2 It is a connection diagram of the safety unit, the control unit and the battery unit of the present invention.

[0020] Figure 3The figure is a connection diagram of a thermal management unit, a control unit and a battery unit according to an embodiment of the present invention.

[0021] Figure 4 This is a connection diagram of a thermal management unit, a control unit and a battery unit according to another embodiment of the present invention.

[0022] Figure 5 It is a connection diagram of the thermal management unit, the safety unit and the control unit of the present invention. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0025] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection claimed in this application.

[0026] See also Figure 1-Figure 5 The present invention discloses an energy storage thermal management and safety system, including a safety unit 10, a thermal management unit 20, a control unit 30 and a battery unit 40, wherein the safety unit 10 and the thermal management unit 20 are respectively connected to the battery unit 40, and the safety unit 10 and the thermal management unit 20 are respectively connected to the control unit 30, the thermal management unit 20 is used to control the battery unit 40 to be within a set operating temperature range, the safety unit 10 is used to take away heat when thermal runaway occurs in the battery unit 40, and the control unit 30 is used to control the safety unit 10 and the thermal management unit 20 to work according to the working condition of the battery unit 40.

[0027] See also Figure 1The safety unit 10 in the energy storage thermal management and safety system mainly functions to quickly eject a large amount of heat-absorbing material to take away the heat generated by the battery cell 40 when the battery cell 40 is about to experience thermal runaway or the battery temperature rises sharply and may burn or even explode, thereby avoiding a thermal chain reaction in the battery cell 40; the thermal management unit 20 mainly functions to control the battery cell 40 to operate within the optimal operating temperature range of the battery, and the control unit 30 mainly functions to control the operation of the safety unit 10 and the thermal management unit 20 according to the working condition of the battery cell 40.

[0028] See also Figure 2 The safety unit 10 includes a refrigerant storage tank 11, a pipe 12 connected to the refrigerant storage tank 11 and the battery unit 40, and a solenoid valve 13 installed on the pipe 12 and connected to the control unit 30. The battery unit 40 includes a battery box 42 and a battery module 41 located in the battery box 42. One end of the pipe 12 connected to the battery unit 40 is provided with a pipe port 121, and the pipe port 121 is located in the battery box 42 and is arranged toward the battery module 41. The safety unit 10 also includes a temperature sensor 16, which is arranged in the battery box 42 and connected to the control unit 30. The temperature sensor 16 is used to sense the temperature information of the battery module 41 in real time and transmit the information back to the control unit 30. In this embodiment, the temperature sensor 16 is arranged in close contact with the battery module 41 to achieve accurate collection of the temperature information of the battery module 41. In this embodiment, the refrigerant storage tank 11 stores R134a liquid.

[0029] Furthermore, the safety unit 10 also includes a smoke sensor 15, which is disposed in the battery box 42 and connected to the control unit 30, and is used to sense the smoke information generated in the battery box 42 in real time and transmit the information back to the control unit 30.

[0030] Furthermore, the safety unit 10 further includes a fusible plug 14 , which is disposed in the battery box 42 and located on a side of the solenoid valve 13 away from the pipe opening 121 .

[0031] In more detail, the safety unit of the present invention has triple protection. The first protection is: when the temperature rises to a certain temperature, the temperature sensor 16 transmits the temperature signal to the control unit 30. When the control unit 30 calculates and compares and determines that the temperature exceeds the set safety temperature, it is determined that the battery module 41 is in a thermal runaway state. At this time, the control unit 30 sends a signal to the solenoid valve 13, and the solenoid valve 13 opens. The R134a liquid flows from the refrigerant storage tank 11 through the pipe 12 and is quickly sprayed from the pipe port 121 to the surface of the battery module 41 to evaporate. The large amount of cold energy generated immediately causes the battery module 41 to The temperature of the battery module 41 drops rapidly, cutting off the thermal chain reaction of the battery module 41, thereby ensuring the safety of the battery module 41; the second level of protection: when the temperature sensor 16 fails, the control unit 30 cannot receive the signal of over-temperature, the temperature of the battery module 41 will continue to rise, and with the temperature rise, the protective layer of the battery module 41 will overheat and produce smoke. At this time, the smoke sensor 15 will sense the signal of the smoke and transmit the signal to the control unit 30. The control unit 30 sends a signal to the solenoid valve 13, and the solenoid valve 13 opens, and the R134a liquid flows from the refrigerant storage tank 11 through the The pipe 12 is quickly sprayed from the pipe port 121 to the surface of the battery module 41 for evaporation, and the large amount of cold energy generated immediately causes the temperature of the battery module 41 to drop rapidly, cutting off the thermal chain reaction of the battery module 41, and further ensuring the safety of the battery module 41; the third level of protection: when the temperature sensor 16, the smoke sensor 15, and the control unit 30 all fail, resulting in the solenoid valve 13 being unable to open normally, the third level of protection is activated. In this embodiment, when the temperature of the battery module 41 rises to about 200 degrees, the battery module 41 has not caught fire, but as the temperature continues to rise, the battery module 41 The thermal chain reaction will be further aggravated. If the battery module 41 is not cooled at this time, the thermal chain reaction will cause the temperature of the battery module to rise rapidly to about 500 degrees. Then the battery module 41 will burn or even explode. The third level of protection is that when the temperature of the battery module 41 rises to about 200 degrees, the metal plug in the fusible plug 14 will melt, and the R134a liquid will quickly spray out from the refrigerant storage tank 11 through the pipeline 12 from the melting port of the fusible plug 14. The large amount of cold energy generated immediately causes the temperature of the battery module 41 to drop rapidly, avoiding the risk of battery combustion or explosion, and ultimately ensuring the safety of the battery module 41.

[0032] See also Figure 3 and Figure 4The thermal management unit 20 adjusts the battery module 41 in real time according to the working temperature of the battery module 41 through its own cooling mode or heating mode to ensure that the battery module 41 works within the set optimal temperature range of 25°C-30°C. When the working temperature of the battery module 41 exceeds 30°C, the thermal management unit 20 starts the cooling mode (see Figure 3 and Figure 4 , the solid line in the figure along the solid arrow direction is the refrigeration circuit of the thermal management unit 20); however, when the ambient temperature is too low, the temperature of the battery module 41 will also drop. When the temperature of the battery module 41 is too low, the activity of the material inside the battery module 41 will drop rapidly, and the battery module 41 will self-discharge, causing the life of the battery module 41 to drop rapidly. At this time, the heating mode needs to be started (please refer to Figure 3 and Figure 4 , the dotted line in the figure along the direction of the dotted arrow is the heating circuit of the thermal management unit 20).

[0033] See also Figure 3 In one embodiment of the present invention, the thermal management unit 20 includes a refrigeration compressor 21, a four-way valve 22, a condenser 23, a dry filter reservoir 24, a throttle valve 25 and an evaporator 26. The refrigeration compressor 21 is connected to the four-way valve 22. Two of the four ports of the four-way valve 22 are respectively connected to the liquid inlet and the liquid outlet of the condenser 23, and the other two ports are respectively connected to the two ends of the liquid collecting pipe 27 of the evaporator 26. The two ends of the dry filter reservoir 24 are respectively connected to the condenser 23 and the liquid collecting pipe 27 of the evaporator 26. In this embodiment, the evaporator 26 is located in the battery box 42, and is arranged on the periphery of the battery module 41 and arranged around the battery module 41.

[0034] Furthermore, in this embodiment, the thermal management unit 20 has a refrigeration circuit and a heating circuit. In the refrigeration circuit, a throttle valve 25 is provided between the dry filter reservoir 24 and the liquid collecting pipe 27 of the evaporator 26 .

[0035] In more detail, the present invention controls the operating temperature of the battery module 41 to be between 25°C and 30°C through the thermal management unit 20. When the operating temperature of the battery module 41 exceeds 30°C, the thermal management unit 20 starts the cooling mode (see Figure 3 ), Figure 3The solid line along the solid arrow direction is the refrigeration circuit of the thermal management unit 20. When the temperature sensor 16 senses that the temperature of the battery module 41 exceeds 30°C, and transmits the information that the temperature of the battery module 41 exceeds 30°C to the control unit 30, the control unit 30 sends a signal, and the refrigeration compressor 21 starts the refrigeration work, compressing the R134a gas into a high-temperature and high-pressure refrigerant gas, which enters the condenser 23 through the four-way valve 22 and is cooled into a medium-temperature and high-pressure refrigerant liquid, and enters the drying filter storage The refrigerant passes through the liquid collector 24, and then after throttling and reducing the pressure through the throttle valve 25, it enters the evaporator 26 from the liquid collecting pipe 27 at one end. The liquid refrigerant absorbs heat and becomes a low-temperature and low-pressure refrigerant gas, and then flows back to the four-way valve 22 through the liquid collecting pipe 27 at the other end, and finally returns to the refrigeration compressor 21 to complete the cycle. Since the refrigeration compressor 21 works continuously, the cold energy generated by the refrigeration circuit is used to offset the heat generated by the battery module 41, so that the working temperature of the battery module 41 is maintained at the optimal working temperature.

[0036] Normally, the battery module 41 generates heat as long as it is working. Therefore, in most cases, it is in cooling mode. However, if the ambient temperature is too low, the temperature of the battery module 41 will also drop. When the temperature of the battery module 41 is too low, the activity of the material inside the battery module 41 will drop rapidly, and the battery module 41 will self-discharge, causing the life of the battery module 41 to drop rapidly. At this time, it is necessary to start the heating mode (see Figure 3 ), Figure 3 The dotted line in the figure along the dotted arrow direction is the heating circuit of the thermal management unit 20. When the temperature sensor 16 senses that the temperature of the battery module 41 is lower than 20°C, the control unit 30 sends a signal, the refrigeration compressor 21 works, and the high-temperature and high-pressure refrigerant gas passes through the four-way valve 22 and enters the evaporator 26 from the other end of the collecting pipe 27 and releases heat to become refrigerant liquid, and flows from one end of the collecting pipe 27 into the drying filter reservoir 24, and then enters the condenser 23, absorbs heat in the condenser 23 to become low-temperature and low-pressure refrigerant gas, and finally flows through the four-way valve 22 back to the refrigeration compressor 21. When the battery temperature rises to 20°C, the control unit 30 sends a signal, and the refrigeration compressor 21 stops working.

[0037] See also Figure 4 In another embodiment of the present invention, the structure of the thermal management unit 20 is substantially the same as that of the above embodiment, except that a throttle valve 25 may be further provided between the drying filter reservoir 24 and the liquid collecting pipe 27 of the evaporator 26 in the heating circuit of the thermal management unit 20.

[0038] In more detail, when the heating mode needs to be activated (see Figure 4 ), Figure 4 The dotted line in the figure along the dotted arrow direction is the heating circuit of the thermal management unit 20. When the temperature sensor 16 senses that the temperature of the battery module 41 is lower than 20°C, the control unit 30 sends a signal, the refrigeration compressor 21 works, and the high-temperature and high-pressure refrigerant gas passes through the four-way valve 22 and enters the evaporator 26 from the other end of the collecting pipe 27 and releases heat to become refrigerant liquid, and flows into the drying and filtering liquid reservoir 24 from one end of the collecting pipe 27, and then enters the condenser 23 after throttling and reducing the pressure through the throttle valve 25, absorbs heat in the condenser 23 to become low-temperature and low-pressure refrigerant gas, and finally flows through the four-way valve 22 back to the refrigeration compressor 21. When the battery temperature rises to 20°C, the control unit 30 sends a signal, and the refrigeration compressor 21 stops working.

[0039] See also Figure 5 The control unit 30 includes a main controller 31 and an intelligent control module 32. The intelligent control module 32 detects the working condition of the battery unit 40 according to the safety unit 10 and feeds back the detection result to the intelligent control module 32. The intelligent control module 32 controls the thermal management unit 20 to adjust the working condition of the battery unit 40. When the working condition of the battery unit 40 is abnormal, the intelligent control module 32 feeds back information to the main controller 31, and the main controller 31 controls the battery unit 40 to stop working.

[0040] More specifically, the control unit 30 detects the working condition of the battery module 41 through the temperature sensor 16 and the smoke sensor 15, and transmits the detected information to the intelligent control module 32. In more detail, when the temperature sensor 16 senses that the temperature is lower than the minimum temperature set for the battery module 41, the temperature sensor 16 transmits the temperature signal to the intelligent control module 32, and the intelligent control module 32 issues a working instruction to the refrigeration compressor 21 and the four-way valve 22 through an internal setting program, and the thermal management unit 20 starts the heating mode. When the temperature of the battery module 41 rises to the set temperature, the thermal management unit 20 stops working to ensure that the battery module 41 works at a suitable temperature. When the temperature sensor 16 senses a temperature higher than the maximum temperature set for the battery module 41, the temperature sensor 16 transmits a temperature signal to the intelligent control module 32. The intelligent control module 32 sends a working instruction to the refrigeration compressor 21 and the four-way valve 22 through an internal setting program, and the thermal management unit 20 starts the refrigeration mode. The cold energy generated by the thermal management unit 20 is used to offset the heat dissipation of the battery module 41, ensuring that the battery module 41 operates at the set temperature, thereby ensuring that the battery module 41 operates under the state of optimal efficiency and optimal life.

[0041] When the battery module 41 malfunctions, one of the situations is that the temperature of the battery module 41 rises abnormally, at this time, the temperature sensor 16 transmits a signal to the intelligent control module 32, and the intelligent control module 32 transmits a signal to the main controller 31, and the main controller 31 stops the battery unit 40 from working.

[0042] The present invention also discloses a new energy vehicle, which has an energy storage device, and the energy storage device is used to provide a power source for the new energy vehicle. The energy storage device further includes the above-mentioned energy storage thermal management and safety system, and the energy storage thermal management and safety system is used to realize the operation of the energy storage device and ensure the safety of the energy storage device.

[0043] The energy storage thermal management and safety system, energy storage device and new energy vehicle provided by the present invention can realize temperature control of the battery cell 40 and control the battery cell 40 in thermal runaway when thermal runaway occurs through the combination of the control unit 30, the thermal management unit 20 and the safety unit 10. The energy storage thermal management and safety system, energy storage device and new energy vehicle provided by the present invention do not require expensive material costs, and also avoid the problem of increased costs due to difficult processing, and can also effectively avoid huge damage to the entire energy storage thermal management and safety system, energy storage device, and new energy vehicle due to immersion protection.

[0044] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An energy storage thermal management and safety system, characterized in that: It includes a safety unit, a thermal management unit, a control unit and a battery unit, wherein the safety unit and the thermal management unit are respectively connected to the battery unit, and the safety unit and the thermal management unit are respectively connected to the control unit, the thermal management unit is used to control the battery unit to be within a set operating temperature range, the safety unit is used to take away heat when thermal runaway occurs in the battery unit, and the control unit is used to control the safety unit and the thermal management unit to work according to the working condition of the battery unit.

2. The energy storage thermal management and safety system according to claim 1, characterized in that: The safety unit includes a refrigerant storage tank, a pipe connected to the refrigerant storage tank and the battery unit, and a solenoid valve installed on the pipe and connected to the control unit. The battery unit includes a battery box and a battery module located in the battery box. One end of the pipe connected to the battery unit is provided with a pipe port, and the pipe port is located in the battery box and is arranged toward the battery module. The safety unit also includes a temperature sensor, which is arranged in the battery box and connected to the control unit. The temperature sensor is used to sense the temperature information of the battery module in real time and transmit the information back to the control unit.

3. The energy storage thermal management and safety system according to claim 2, characterized in that: The safety unit further includes a smoke sensor, which is disposed in the battery box and connected to the control unit. The smoke sensor is used to sense smoke information in the battery box in real time and transmit the information back to the control unit.

4. The energy storage thermal management and safety system according to claim 2, characterized in that: The safety unit further includes a fusible plug, which is disposed in the battery box and located at a side of the solenoid valve away from the pipeline opening.

5. The energy storage thermal management and safety system according to claim 2, characterized in that: The thermal management unit includes a refrigeration compressor, a four-way valve, a condenser, a dry filter liquid reservoir, a throttle valve and an evaporator. The refrigeration compressor is connected to the four-way valve. Two of the four ports of the four-way valve are respectively connected to the liquid inlet and the liquid outlet of the condenser, and the other two ports are respectively connected to the two ends of the liquid collecting pipe of the evaporator. The two ends of the dry filter liquid reservoir are respectively connected to the liquid collecting pipes of the condenser and the evaporator.

6. The energy storage thermal management and safety system according to claim 5, characterized in that: The thermal management unit has a refrigeration circuit and a heating circuit. On the refrigeration circuit, a throttle valve is further provided between the dry filter reservoir and the liquid collecting pipe of the evaporator.

7. The energy storage thermal management and safety system according to claim 5, characterized in that: The evaporator is located in the battery module box and is arranged on the periphery of the battery module.

8. The energy storage thermal management and safety system according to claim 1, characterized in that: The control unit includes a main controller and an intelligent control module. The intelligent control module detects the working condition of the battery unit according to the safety unit and feeds back the detection result to the intelligent control module. The intelligent control module controls the thermal management unit to adjust the working condition of the battery unit. When the working condition of the battery unit is abnormal, the intelligent control module feeds back information to the main controller, and the main controller controls the battery unit to stop working.

9. An energy storage device, characterized in that: Comprising the energy storage thermal management and safety system as described in any one of claims 1-8.

10. A new energy vehicle, characterized in that: Comprising the energy storage device as claimed in claim 9.

Images