Energy storage device temperature control system and temperature control method thereof

Abstract

The application provides a kind of energy storage equipment temperature control system and its temperature control method, energy storage equipment includes battery module and other energy storage components except battery module;Temperature control system includes controller, refrigeration system, immersion system and liquid cooling plate system;Controller is connected with refrigeration system, immersion system, liquid cooling plate system control respectively;Refrigeration system is connected with immersion system through first plate heat exchanger, refrigeration system is connected with liquid cooling plate system through second plate heat exchanger;First plate heat exchanger and second plate heat exchanger are connected in parallel in refrigeration system;Immersion system is provided with immersion tank, liquid cooling plate system is provided with liquid cooling plate assembly, battery module is soaked in immersion tank, at least part of other energy storage components contact with liquid cooling plate assembly.The temperature control system in the application adopts different heat dissipation modes for different heat production of different components in energy storage equipment, so that the cold load is reasonably distributed, the heat dissipation effect is good, and the energy consumption is low.

Description

Technical Field

[0001] This invention relates to the field of temperature control, and in particular to a temperature control system for energy storage equipment and a temperature control method thereof. Background Technology

[0002] Energy storage devices can store electrical energy and are widely used in various scenarios such as power generation, transmission and distribution, and power consumption. In recent years, with the continuous development of energy storage technology, the energy stored and output power of energy storage devices have been increasing day by day. The heat generated during their operation is also very high. In order to maintain the high-efficiency operation of energy storage devices within a safe range, it is imperative to find a heat dissipation method with strong heat dissipation capabilities for temperature control.

[0003] In temperature control, the most widely used and mature methods are air cooling, liquid cooling plates, and immersion cooling. Air cooling suffers from low heat dissipation efficiency, poor temperature control uniformity, and low energy efficiency ratio. Liquid cooling plates have issues with high contact thermal resistance, small heat exchange area, and inability to meet high heat flux density environments. Immersion cooling provides uniform and fast heat dissipation, but requires large amounts of coolant and is costly. Currently, most energy storage devices use a single cooling method for temperature control. For example, Chinese invention patent CN218887311U uses only air cooling, and Chinese invention patent CN212783590U uses only immersion cooling. Because the heat flux density of battery modules in energy storage devices is high, while the heat flux density of other energy storage components is low, using a single cooling method can easily lead to unreasonable cooling load distribution, resulting in poor heat dissipation and increased energy consumption.

[0004] Therefore, it is necessary to provide a reasonably designed temperature control system to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems in the existing technology, the present invention provides a temperature control system for energy storage devices. This system employs different heat dissipation methods for different components in the energy storage device, thereby achieving reasonable distribution of cooling load, good heat dissipation effect, and low energy consumption.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A temperature control system for an energy storage device is disclosed. The energy storage device includes a battery module and other energy storage components besides the battery module. The temperature control system includes a controller, a cooling system, an immersion system, and a liquid-cooled plate system. The controller is connected to the cooling system, the immersion system, and the liquid-cooled plate system. The cooling system is connected to the immersion system via a first plate heat exchanger and to the liquid-cooled plate system via a second plate heat exchanger. The first and second plate heat exchangers are connected in parallel in the cooling system. The immersion system includes an immersion tank, and the liquid-cooled plate system includes a liquid-cooled plate assembly. The battery module is immersed in the immersion tank, and at least some of the other energy storage components are in contact with the liquid-cooled plate assembly. The immersion system has four modes: immersion cooling mode, immersion heat dissipation mode, immersion self-circulation mode, and immersion heating mode. The liquid-cooled plate system has three modes: liquid-cooled plate cooling mode, liquid-cooled plate heat dissipation mode, and liquid-cooled plate self-circulation mode.

[0008] Furthermore, the refrigeration system includes a gas-liquid separator, a compressor, a condenser, a liquid storage tank, and a first filter connected in sequence. The cold-side inlet of the first plate heat exchanger and the cold-side inlet of the second plate heat exchanger are both connected to the first filter. The cold-side outlet of the first plate heat exchanger and the cold-side outlet of the second plate heat exchanger are both connected to the gas-liquid separator. A first electronic expansion valve is provided between the first filter and the cold-side inlet of the first plate heat exchanger, and a second electronic expansion valve is provided between the first filter and the cold-side inlet of the second plate heat exchanger.

[0009] Furthermore, a temperature sensor is provided at least at one of the following locations: between the cold-side outlet of the first plate heat exchanger and the gas-liquid separator; between the cold-side outlet of the second plate heat exchanger and the gas-liquid separator; between the compressor and the condenser; and between the liquid storage tank and the first filter. A low-pressure sensor is provided at the inlet end of the compressor, a high-pressure sensor is provided at the outlet end of the compressor, and a pressure switch is provided between the high-pressure sensor and the condenser.

[0010] Furthermore, the immersion system includes an immersion main circuit, an immersion heat dissipation branch circuit, and an immersion heating branch circuit; the immersion main circuit includes a second filter, a first expansion tank, a first hydraulic pump, a first solenoid valve, the immersion tank, and a second solenoid valve connected in sequence; the hot-side inlet of the first plate heat exchanger is connected to the second solenoid valve, and the hot-side outlet of the first plate heat exchanger is connected to the second filter; the inlet end of the immersion heat dissipation branch circuit is located between the second solenoid valve and the immersion tank, and the outlet end of the immersion heat dissipation branch circuit is located between the hot-side outlet of the first plate heat exchanger and the second filter; the immersion heating branch circuit is connected in parallel with the first solenoid valve; the immersion heat dissipation branch circuit includes a third solenoid valve and a first radiator arranged in sequence; the immersion heating branch circuit includes an electric heater.

[0011] Furthermore, a first check valve is provided between the first hydraulic pump and the first solenoid valve; a first flow switch is provided between the outlet end of the immersion heat dissipation branch and the second filter; a pressure sensor is provided at least one of the following: between the second filter and the first expansion tank, between the first check valve and the first solenoid valve, and between the second solenoid valve and the immersion tank; and a temperature sensor is provided at the inlet end and / or outlet end of the immersion tank.

[0012] Furthermore, when the immersion system enters the immersion cooling mode, the first electronic expansion valve, the first solenoid valve, and the second solenoid valve are all open, while the third solenoid valve and the electric heater are all closed, forming an immersion cooling circuit in the immersion system; when the immersion system enters the immersion heat dissipation mode, the first solenoid valve and the third solenoid valve are all open, while the first electronic expansion valve, the second solenoid valve, and the electric heater are all closed, forming an immersion heat dissipation circuit in the immersion system; when the immersion system enters the immersion self-circulation mode, the first solenoid valve and the second solenoid valve are all open, while the first electronic expansion valve, the third solenoid valve, and the electric heater are all closed, forming an immersion self-circulation circuit in the immersion system; when the immersion system enters the immersion heating mode, the electric heater and the second solenoid valve are all open, while the first electronic expansion valve, the first solenoid valve, and the third solenoid valve are all closed, forming an immersion heating circuit in the immersion system.

[0013] Furthermore, the liquid-cooled plate system includes a main liquid-cooled plate path and a liquid-cooled plate heat dissipation branch path; the main liquid-cooled plate path includes a third filter, a second expansion tank, a second hydraulic pump, the liquid-cooled plate assembly, and a fourth solenoid valve connected in sequence; the hot-side inlet of the second plate heat exchanger is connected to the fourth solenoid valve, and the hot-side outlet of the second plate heat exchanger is connected to the third filter; the inlet end of the liquid-cooled plate heat dissipation branch path is located between the fourth solenoid valve and the liquid-cooled plate assembly, and the outlet end of the liquid-cooled plate heat dissipation branch path is located between the hot-side outlet of the second plate heat exchanger and the third filter; the liquid-cooled plate heat dissipation branch path includes a fifth solenoid valve and a second radiator arranged in sequence.

[0014] Furthermore, a second check valve is provided between the second hydraulic pump and the liquid cooling plate assembly; a second flow switch is provided between the outlet end of the liquid cooling plate heat dissipation branch and the third filter; a pressure sensor is provided at least one of the following: between the third filter and the second expansion tank, between the second check valve and the liquid cooling plate assembly, and between the fourth solenoid valve and the liquid cooling plate assembly; a temperature sensor is provided at the inlet end and / or outlet end of the liquid cooling plate assembly.

[0015] Furthermore, when the liquid cooling plate system enters the liquid cooling plate cooling mode, both the second electronic expansion valve and the fourth solenoid valve are open, and the fifth solenoid valve is closed, forming a liquid cooling plate cooling circuit in the liquid cooling plate system; when the liquid cooling plate system enters the liquid cooling plate heat dissipation mode, the fifth solenoid valve is open, and both the second electronic expansion valve and the fourth solenoid valve are closed, forming a liquid cooling plate heat dissipation circuit in the liquid cooling plate system; when the liquid cooling plate system enters the liquid cooling plate self-circulation mode, the fourth solenoid valve is open, and both the second electronic expansion valve and the fifth solenoid valve are closed, forming a liquid cooling plate self-circulation circuit in the liquid cooling plate system.

[0016] The present invention also provides a temperature control method for use in the temperature control system of an energy storage device in any of the above embodiments, the temperature control method comprising the following steps:

[0017] S1. Real-time acquisition of the first cooling requirement θ of the immersion system. 冷却1 and heating requirements θ 加热 And to obtain the second cooling requirement θ of the liquid cooling plate system in real time. 冷却2 ;

[0018] S2, based on θ obtained in step S1 冷却1 and θ 加热 The size of the immersion system determines the different modes controlled by the controller.

[0019] When θ 冷却1When the immersion rate is ≥100%, the immersion system enters the immersion cooling mode, and an immersion cooling circuit is formed in the immersion system;

[0020] When 0 < θ 冷却1 When the concentration is less than 100%, the immersion system enters the immersion heat dissipation mode, and an immersion heat dissipation circuit is formed in the immersion system.

[0021] When θ 冷却1 When the value is ≤0, the immersion system enters the immersion self-circulation mode, and an immersion self-circulation loop is formed in the immersion system;

[0022] When θ 加热 When the value is ≥0, the immersion system enters the immersion heating mode, and an immersion heating circuit is formed in the immersion system;

[0023] At the same time, based on θ obtained in step S1 冷却2 The size of the liquid cooling plate system determines its mode, and the controller also controls the liquid cooling plate system to enter different modes.

[0024] When θ 冷却2 When the liquid cooling plate system reaches ≥100%, it enters the liquid cooling plate cooling mode, and a liquid cooling plate cooling circuit is formed in the liquid cooling plate system.

[0025] When 0 < θ 冷却2 When <100%, the liquid cooling plate system enters the liquid cooling plate heat dissipation mode, and a liquid cooling plate heat dissipation circuit is formed in the liquid cooling plate system;

[0026] When θ 冷却2 When the value is ≤0, the liquid cooling plate system enters the liquid cooling plate self-circulation mode, and a liquid cooling plate self-circulation loop is formed in the liquid cooling plate system;

[0027] The first cooling requirement θ 冷却1 Calculated using formula (1):

[0028]

[0029] The heating requirement θ 加热 The result is obtained from formula (2):

[0030]

[0031] Second cooling requirement θ 冷却2 The result is obtained from formula (3):

[0032]

[0033] In the above formula, T 电池模组 The temperature of the battery module; T 液冷板 T represents the temperature of the liquid cooling plate assembly. 设定1 Set the first temperature; T设定2 The second set temperature; T 设定3 Set the third temperature; T 冷却灵敏度 For cooling sensitivity; T 加热灵敏度 This refers to heating sensitivity.

[0034] The beneficial effects of this invention are as follows:

[0035] (1) By setting up an immersion system and a liquid cooling plate system in the temperature control system, the battery module with a high heat flux density is placed in the immersion tank of the immersion system, and other energy storage components with a low heat flux density are placed in contact with the liquid cooling plate components in the liquid cooling plate system. On the one hand, the immersion system can dissipate heat evenly and quickly to the battery module, ensuring the heat dissipation effect. On the other hand, the liquid cooling plate components can contact other energy storage components, which can effectively reduce the volume of the immersion tank and the amount of coolant used in the immersion tank. Thus, while ensuring sufficient heat dissipation, it is beneficial to save energy consumption and cost to the maximum extent.

[0036] (2) By connecting the cold side of the first plate heat exchanger and the cold side of the second plate heat exchanger in parallel in the refrigeration system, and then connecting the hot side of the first plate heat exchanger to the immersion system and the hot side of the second plate heat exchanger to the liquid cooling plate system, the immersion system and the liquid cooling plate system can share a refrigeration system, which can simplify the temperature control system and save space and cost.

[0037] (3) The immersion system has four modes: immersion cooling mode, immersion heat dissipation mode, immersion self-circulation mode and immersion heating mode. The immersion system enters different modes according to the specific cooling and heating requirements of the battery module, so as to better meet the temperature requirements of the battery module and save energy.

[0038] (4) The liquid cooling plate system has three modes: liquid cooling plate cooling mode, liquid cooling plate heat dissipation mode and liquid cooling plate self-circulation mode. The liquid cooling plate system enters different modes according to the specific cooling requirements of other energy storage components; thus, it can better meet the temperature requirements of other energy storage components and save energy. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the temperature control system of the present invention.

[0040] Figure 2 This is a schematic diagram of the refrigeration system of the present invention.

[0041] Figure 3 This is a schematic diagram showing the flow direction of the refrigerant in the immersion system of the present invention when it is in immersion cooling mode and immersion self-circulation mode.

[0042] Figure 4This is a schematic diagram showing the flow direction of the refrigerant in the immersion heat dissipation mode of the immersion system of the present invention.

[0043] Figure 5 This is a schematic diagram showing the flow direction of the refrigerant in the immersion heating mode of the immersion system of the present invention.

[0044] Figure 6 This is a schematic diagram showing the flow direction of the coolant in the liquid cooling plate system of the present invention when it is in liquid cooling plate refrigeration mode and liquid cooling plate self-circulation mode.

[0045] Figure 7 This is a schematic diagram showing the flow direction of the coolant in the liquid cooling plate system of the present invention when it is in liquid cooling plate heat dissipation mode.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100-Battery module, 1-Refrigeration system, 11-Gas-liquid separator, 12-Compressor, 13-Condenser, 14-Reservoir tank, 15-First filter, 16-First electronic expansion valve, 17-Second electronic expansion valve, 18-Low-pressure sensor, 19-High-pressure sensor, 2-Immersion system, 20-Immersion tank, 21-Second filter, 22-First expansion tank, 23-First hydraulic pump, 24-First solenoid valve, 25-Second solenoid valve, 26-Third solenoid valve, 27-First radiator, 28-Electric heater, 29-First check valve, 210-First flow switch, 3-Liquid cooling plate system, 30-Liquid cooling plate assembly, 31-Third filter, 32 - Second expansion tank, 33- Second hydraulic pump, 34- Fourth solenoid valve, 35- Fifth solenoid valve, 36- Second radiator, 37- Second check valve, 38- Second flow switch, 4- First plate heat exchanger, 41- Cold side inlet of the first plate heat exchanger, 42- Cold side outlet of the first plate heat exchanger, 43- Hot side inlet of the first plate heat exchanger, 44- Hot side outlet of the first plate heat exchanger, 5- Second plate heat exchanger, 51- Cold side inlet of the second plate heat exchanger, 52- Cold side outlet of the second plate heat exchanger, 53- Hot side inlet of the second plate heat exchanger, 54- Hot side outlet of the second plate heat exchanger, 6- Temperature sensor, 7- Pressure sensor, 8- Shut-off valve. Detailed Implementation

[0048] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0049] Example 1

[0050] See Figure 1-7A temperature control system for an energy storage device is disclosed. The energy storage device includes a battery module 100 and other energy storage components besides the battery module. The temperature control system includes a controller, a cooling system 1, an immersion system 2, and a liquid-cooled plate system 3. The controller is connected to the cooling system 1, the immersion system 2, and the liquid-cooled plate system 3. The cooling system 1 is connected to the immersion system 2 via a first plate heat exchanger 4, and to the liquid-cooled plate system 3 via a second plate heat exchanger 5. The first plate heat exchanger 4 and the second plate heat exchanger 5 are connected to each other. Heaters 5 are connected in parallel in the refrigeration system 1; an immersion tank 20 is provided in the immersion system, and a liquid cooling plate assembly 30 is provided in the liquid cooling plate system 3. The battery module 100 is immersed in the immersion tank 20, and at least some of the other energy storage components are in contact with the liquid cooling plate assembly 30; the immersion system 2 has four modes, namely immersion cooling mode, immersion heat dissipation mode, immersion self-circulation mode, and immersion heating mode; the liquid cooling plate system 3 has three modes, namely liquid cooling plate cooling mode, liquid cooling plate heat dissipation mode, and liquid cooling plate self-circulation mode.

[0051] In this embodiment, by setting up an immersion system 2 and a liquid cooling plate system 3 in the temperature control system, the battery module 100 with a high heat flux density is placed in the immersion tank 20 of the immersion system 2, while other energy storage components with lower heat flux densities are placed in contact with the liquid cooling plate assembly 30 in the liquid cooling plate system 3. Furthermore, the immersion system 2 and the liquid cooling plate system 3 share a single cooling system 1. On the one hand, the immersion system 2 can uniformly and rapidly dissipate heat from the battery module 100, ensuring effective heat dissipation. On the other hand, the contact between the liquid cooling plate assembly 30 and other energy storage components effectively reduces the volume of the immersion tank 20 and the amount of coolant used in the immersion tank 20. Sharing a single cooling system 1 also simplifies the temperature control system and saves space. Through the reasonable setting of the temperature control system in this embodiment, the cooling load can be reasonably distributed between the battery module 100 with a high heat flux density and other energy storage components with lower heat flux densities, thereby maximizing energy and cost savings while ensuring sufficient heat dissipation.

[0052] In addition, the immersion system has four modes: immersion cooling mode, immersion heat dissipation mode, immersion self-circulation mode, and immersion heating mode; the liquid cooling plate system has three modes: liquid cooling plate cooling mode, liquid cooling plate heat dissipation mode, and liquid cooling plate self-circulation mode. The immersion system enters different modes according to the specific cooling and heating requirements of the battery module, and the liquid cooling plate system enters different modes according to the specific cooling requirements of other energy storage components. This can better meet the temperature requirements of the battery module and other energy storage components in the energy storage device, and avoid waste of cooling load, thus saving energy.

[0053] Example 2

[0054] Referring to Figure 2, the refrigeration system 1 includes a gas-liquid separator 11, a compressor 12, a condenser 13, a liquid storage tank 14, and a first filter 15 connected in sequence. The cold-side inlet 41 of the first plate heat exchanger and the cold-side inlet 51 of the second plate heat exchanger are both connected to the first filter 15. The cold-side outlet 42 of the first plate heat exchanger and the cold-side outlet 52 of the second plate heat exchanger are both connected to the gas-liquid separator 11. A first electronic expansion valve 16 is provided between the first filter 15 and the cold-side inlet 41 of the first plate heat exchanger, and a second electronic expansion valve 17 is provided between the first filter 15 and the cold-side inlet 51 of the second plate heat exchanger.

[0055] Preferably, a temperature sensor 6 is provided at least one of the following locations: between the cold side outlet 42 of the first plate heat exchanger and the gas-liquid separator 11; between the cold side outlet 52 of the second plate heat exchanger and the gas-liquid separator 11; between the compressor 12 and the condenser 13; and between the liquid storage tank 14 and the first filter 15.

[0056] Preferably, a low-pressure sensor 18 is provided at the inlet end of the compressor 12, a high-pressure sensor 19 is provided at the outlet end of the compressor 12, and a pressure switch 10 is provided between the high-pressure sensor 19 and the condenser 13.

[0057] In this embodiment, by connecting the cold side of the first plate heat exchanger and the cold side of the second plate heat exchanger in parallel in the refrigeration system 1, and then connecting the hot side of the first plate heat exchanger to the immersion system 2 and the hot side of the second plate heat exchanger to the liquid-cooled plate system 3, the immersion system 2 and the liquid-cooled plate system 3 can share a set of refrigeration system 1, which can simplify the temperature control system and save space and cost. Furthermore, a first electronic expansion valve 16 is provided on the cold side inlet 41 of the first plate heat exchanger, and a second electronic expansion valve 17 is provided on the cold side inlet 51 of the second plate heat exchanger. The first electronic expansion valve 16 can adjust the flow rate of the refrigerant according to the cooling requirements of the immersion system 2, and the second electronic expansion valve 17 can adjust the flow rate of the refrigerant according to the cooling requirements of the liquid-cooled plate system 3. Thus, the cooling load entering the immersion system 2 and the liquid-cooled plate system 3 can be adjusted in real time according to the cooling requirements of different components in the energy storage device in actual application. This allows the cooling load to be reasonably distributed between the battery module 100 with a high heat flux density and other energy storage components with a low heat flux density, ensuring sufficient cooling of each component of the energy storage device and preventing waste of cooling load, thereby saving energy and costs.

[0058] The refrigerant in the refrigeration system 1 enters the cold side inlet 41 of the first plate heat exchanger through the first electronic expansion valve 16 and enters the cold side inlet 51 of the second plate heat exchanger through the second electronic expansion valve 17. The refrigerant exchanges heat with the immersion system 2 in the first plate heat exchanger 4 and with the liquid-cooled plate system 3 in the second plate heat exchanger 5. After absorbing heat, the refrigerant flows out from the cold side outlet 42 of the first plate heat exchanger and the cold side outlet 52 of the second plate heat exchanger. The refrigerant then runs sequentially along the gas-liquid separator 11, compressor 12, condenser 13, liquid receiver 14, and first filter 15 to form a refrigeration circuit.

[0059] Example 3

[0060] See Figure 3-5 The immersion system 2 includes an immersion main path, an immersion heat dissipation branch path, and an immersion heating branch path. The immersion main path includes a second filter 21, a first expansion tank 22, a first hydraulic pump 23, a first solenoid valve 24, the immersion tank 20, and a second solenoid valve 25 connected in sequence. The hot-side inlet 43 of the first plate heat exchanger is connected to the second solenoid valve 25, and the hot-side outlet 44 of the first plate heat exchanger is connected to the second filter 21. The inlet end of the immersion heat dissipation branch path is located between the second solenoid valve 25 and the immersion tank 20, and the outlet end of the immersion heat dissipation branch path is located between the hot-side outlet 44 of the first plate heat exchanger and the second filter 21. The immersion heating branch path is connected in parallel with the first solenoid valve 24. The immersion heat dissipation branch path includes a third solenoid valve 26 and a first radiator 27 arranged in sequence. The immersion heating branch path includes an electric heater 28.

[0061] Preferably, a first check valve 29 is provided between the first hydraulic pump 23 and the first solenoid valve 24; a first flow switch 210 is provided between the outlet end of the immersion heat dissipation branch and the second filter 21; a pressure sensor 7 is provided at least one of the following: between the second filter 21 and the first expansion tank 22, between the first check valve 29 and the first solenoid valve 24, and between the second solenoid valve 25 and the immersion tank 20; and a temperature sensor 6 is provided at the inlet end and / or outlet end of the immersion tank.

[0062] Preferably, a shut-off valve 8 is provided at least one of the following locations: between the second filter 21 and the first expansion tank 22; between the first solenoid valve 24 and the immersion tank 20; between the immersion tank 20 and the second solenoid valve 25; and between the first flow switch 210 and the second filter 21. By providing shut-off valves 8 between each component, when a component fails, the pipeline can be closed by the shut-off valve 8, facilitating component replacement and maintenance and reducing refrigerant leakage.

[0063] Preferably, when the immersion system enters the immersion cooling mode, the first electronic expansion valve 16, the first solenoid valve 24, and the second solenoid valve 25 are all open, while the third solenoid valve 26 and the electric heater 28 are all closed, forming an immersion cooling circuit in the immersion system 2; when the immersion system enters the immersion heat dissipation mode, the first solenoid valve 24 and the third solenoid valve 26 are all open, while the first electronic expansion valve 16, the second solenoid valve 25, and the electric heater 28 are all closed, forming an immersion heat dissipation circuit in the immersion system 2; when the immersion system enters the immersion self-circulation mode, the first solenoid valve 24 and the second solenoid valve 25 are all open, while the first electronic expansion valve 16, the third solenoid valve 26, and the electric heater 28 are all closed, forming an immersion self-circulation circuit in the immersion system 2; when the immersion system enters the immersion heating mode, the electric heater 28 and the second solenoid valve 25 are all open, while the first electronic expansion valve 16, the first solenoid valve 24, and the third solenoid valve 26 are all closed, forming an immersion heating circuit in the immersion system 2.

[0064] In this embodiment, the hot side of the first plate heat exchanger is located in the immersion system 2. The immersion system 2 exchanges heat with the refrigeration system 1 through the first plate heat exchanger 4 to achieve cooling of the immersion system 2. The immersion system 2 is also provided with an immersion heat dissipation branch and an immersion heating branch to enable the immersion system to have different modes. Specifically, the immersion system in this embodiment has four modes: immersion cooling mode, immersion heat dissipation mode, immersion self-circulation mode, and immersion heating mode. The immersion system enters different modes according to the specific cooling and heating requirements of the battery module 100, thereby better meeting the temperature requirements of the battery module 100. Since the battery module needs to be immersed in a coolant, the coolant used must be a non-conductive liquid, such as mineral oil.

[0065] When the immersion system 2 enters the immersion refrigeration mode, the first electronic expansion valve 16, the first solenoid valve 24, and the second solenoid valve 25 are all opened, while the third solenoid valve 26 and the electric heater 28 are all closed. The refrigerant in the immersion system comes out from the immersion tank 20, passes through the second solenoid valve 25, and enters the hot side inlet 43 of the first plate heat exchanger. It exchanges heat with the refrigeration system 1 in the first plate heat exchanger 4. After heat exchange, the refrigerant flows out from the hot side outlet 44 of the first plate heat exchanger. The refrigerant then runs sequentially along the first flow switch 210, the second filter 21, the first expansion tank 22, the first hydraulic pump 23, the first solenoid valve 24 or the electric heater 28, and the immersion tank 20. Part of the refrigerant flows through the first solenoid valve 24 and part flows through the electric heater 28. The electric heater 28 does not heat the refrigerant, thus forming an immersion refrigeration circuit.

[0066] When the immersion system 2 enters the immersion heat dissipation mode, both the first solenoid valve 24 and the third solenoid valve 26 are open, while the first electronic expansion valve 16, the second solenoid valve 25, and the electric heater 28 are closed. The refrigerant in the immersion system comes out of the immersion tank 20, passes through the third solenoid valve 26, and enters the first radiator 27 for heat dissipation. The cooled refrigerant then flows sequentially along the first flow switch 210, the second filter 21, the first expansion tank 22, the first hydraulic pump 23, the first solenoid valve 24 or the electric heater 28, and the immersion tank 20. Part of the refrigerant flows through the first solenoid valve 24, and part flows through the electric heater 28. The electric heater 28 does not heat the refrigerant, thus forming an immersion heat dissipation circuit.

[0067] When the immersion system 2 enters the immersion self-circulation mode, both the first solenoid valve 24 and the second solenoid valve 25 are open, while the first electronic expansion valve 16, the third solenoid valve 26, and the electric heater 28 are closed. The refrigerant in the immersion system comes out from the immersion tank 20 and enters the hot side inlet 43 of the first plate heat exchanger through the second solenoid valve 25. Since the first electronic expansion valve 16 is closed, the refrigerant does not exchange heat in the first plate heat exchanger 4. The refrigerant flows directly out from the hot side outlet 44 of the first plate heat exchanger. The refrigerant then runs sequentially along the first flow switch 210, the second filter 21, the first expansion tank 22, the first hydraulic pump 23, the first solenoid valve 24 or the electric heater 28, and the immersion tank 20. Part of the refrigerant flows through the first solenoid valve 24 and part flows through the electric heater 28. The electric heater 28 does not heat the refrigerant, forming an immersion self-circulation loop.

[0068] When the immersion system enters the immersion heating mode, both the electric heater 28 and the second solenoid valve 25 are open, while the first electronic expansion valve 16, the first solenoid valve 24, and the third solenoid valve 26 are closed. The refrigerant in the immersion system comes out of the immersion tank 20 and enters the hot side inlet 43 of the first plate heat exchanger through the second solenoid valve 25. Since the first electronic expansion valve 16 is closed, the refrigerant does not exchange heat in the first plate heat exchanger 4. The refrigerant flows directly out from the hot side outlet 44 of the first plate heat exchanger. The refrigerant then runs sequentially along the first flow switch 210, the second filter 21, the first expansion tank 22, the first hydraulic pump 23, the electric heater 28, and the immersion tank 20. All the refrigerant flows through the electric heater 28, which heats the refrigerant, forming an immersion heating circuit. When the ambient temperature is low, in order to prevent the battery module temperature from dropping too low and affecting the operation of the battery module, the immersion system will enter the immersion heating mode. The electric heater 28 will be turned on, so that the heated coolant will enter the immersion tank 20, so that the battery module in the immersion tank 20 can maintain its appropriate temperature and ensure that the battery module can maintain normal operation even at low ambient temperatures.

[0069] Example 4

[0070] See Figure 6-7 The liquid-cooled plate system includes a main liquid-cooled plate path and a branch liquid-cooled plate heat dissipation path. The main liquid-cooled plate path includes a third filter 31, a second expansion tank 32, a second hydraulic pump 33, the liquid-cooled plate assembly 30, and a fourth solenoid valve 34 connected in sequence. The hot-side inlet 53 of the second plate heat exchanger is connected to the fourth solenoid valve 34, and the hot-side outlet 54 of the second plate heat exchanger is connected to the third filter 31. The inlet end of the branch liquid-cooled plate heat dissipation path is located between the fourth solenoid valve 34 and the liquid-cooled plate assembly 30, and the outlet end of the branch liquid-cooled plate heat dissipation path is located between the hot-side outlet 54 of the second plate heat exchanger and the third filter 31. The branch liquid-cooled plate heat dissipation path includes a fifth solenoid valve 35 and a second radiator 36 arranged in sequence.

[0071] Preferably, a second check valve 37 is provided between the second hydraulic pump 33 and the liquid cooling plate assembly 30; a second flow switch 38 is provided between the outlet end of the liquid cooling plate heat dissipation branch and the third filter 31; a pressure sensor 7 is provided at least one of the following: between the third filter 31 and the second expansion tank 32, between the second check valve 37 and the liquid cooling plate assembly 30, and between the fourth solenoid valve 34 and the liquid cooling plate assembly 30; and a temperature sensor 6 is provided at the inlet end and / or outlet end of the liquid cooling plate assembly 30.

[0072] Preferably, a shut-off valve 8 is provided at least at one of the following locations: between the third filter 31 and the second expansion tank 32; between the second one-way valve 37 and the liquid cooling plate assembly 30; between the liquid cooling plate assembly 30 and the fourth solenoid valve 34; and between the second flow switch 38 and the third filter 31. By providing shut-off valves 8 between each component, when a component fails, the pipeline can be closed by the shut-off valve 8, facilitating component replacement and maintenance and reducing coolant leakage.

[0073] Preferably, when the liquid cooling plate system 3 enters the liquid cooling plate cooling mode, both the second electronic expansion valve 17 and the fourth solenoid valve 34 are open, and the fifth solenoid valve 35 is closed, forming a liquid cooling plate cooling circuit in the liquid cooling plate system 3; when the liquid cooling plate system 3 enters the liquid cooling plate heat dissipation mode, the fifth solenoid valve 35 is open, and both the second electronic expansion valve 17 and the fourth solenoid valve 34 are closed, forming a liquid cooling plate heat dissipation circuit in the liquid cooling plate system 3; when the liquid cooling plate system 3 enters the liquid cooling plate self-circulation mode, the fourth solenoid valve 34 is open, and both the second electronic expansion valve 17 and the fifth solenoid valve 35 are closed, forming a liquid cooling plate self-circulation circuit in the liquid cooling plate system 3.

[0074] In this embodiment, the hot side of the second plate heat exchanger is located in the liquid-cooled plate system 3. The liquid-cooled plate system 3 exchanges heat with the refrigeration system 1 through the second plate heat exchanger 5 to achieve cooling of the liquid-cooled plate system 3. The immersion system 2 is also provided with a liquid-cooled plate heat dissipation branch to enable the liquid-cooled plate system 3 to have different modes. Specifically, the liquid-cooled plate system in this embodiment has three modes: liquid-cooled plate cooling mode, liquid-cooled plate heat dissipation mode, and liquid-cooled plate self-circulation mode. The liquid-cooled plate system enters different modes according to the specific cooling requirements of other energy storage components, thereby better meeting the temperature requirements of other energy storage components. The liquid-cooled plate system is specifically a water-cooled plate system, and the coolant in the liquid-cooled plate system is specifically water.

[0075] When the liquid-cooled plate system 3 enters the liquid-cooled plate refrigeration mode, the second electronic expansion valve 17 and the fourth solenoid valve 34 are both opened, and the fifth solenoid valve 35 is closed. The coolant in the liquid-cooled plate system comes out from the liquid-cooled plate assembly 30, passes through the fourth solenoid valve 34 and enters the hot side inlet 53 of the second plate heat exchanger. In the second plate heat exchanger 5, it exchanges heat with the refrigeration system 1. The coolant after heat exchange flows out from the hot side outlet 54 of the second plate heat exchanger. The coolant then runs sequentially along the second flow switch 38, the third filter 31, the second expansion tank 32, the second hydraulic pump 33 and the liquid-cooled plate assembly 30 to form a liquid-cooled plate refrigeration circuit.

[0076] When the liquid cooling plate system 3 enters the liquid cooling plate heat dissipation mode, the fifth solenoid valve 35 is opened, and the second electronic expansion valve 17 and the fourth solenoid valve 34 are both closed. The coolant in the liquid cooling plate system comes out from the liquid cooling plate assembly 30, passes through the fifth solenoid valve 35 and enters the second radiator 36 for heat dissipation. The cooled coolant then runs sequentially along the second flow switch 38, the third filter 31, the second expansion tank 32, the second hydraulic pump 33 and the liquid cooling plate assembly 30 to form a liquid cooling plate heat dissipation circuit.

[0077] When the liquid cooling plate system 3 enters the liquid cooling plate self-circulation mode, the fourth solenoid valve 34 is opened, and the second electronic expansion valve 17 and the fifth solenoid valve 35 are both closed. The coolant in the liquid cooling plate system comes out from the liquid cooling plate assembly 30, passes through the fourth solenoid valve 34 and enters the hot side inlet 53 of the second plate heat exchanger. Since the second electronic expansion valve 17 is closed, the coolant does not exchange heat in the second plate heat exchanger 5. The coolant flows directly out from the hot side outlet 54 of the second plate heat exchanger. The coolant then runs sequentially along the second flow switch 38, the third filter 31, the second expansion tank 32, the second hydraulic pump 33 and the liquid cooling plate assembly 30 to form a liquid cooling plate self-circulation loop.

[0078] Example 5

[0079] See Figure 1-7A temperature control method, wherein the temperature control method is applied to the temperature control system described in any of the above embodiments, the temperature control method comprising the following steps:

[0080] S1. Real-time acquisition of the first cooling requirement θ of the immersion system. 冷却1 and heating requirements θ 加热 and the second cooling requirement θ of the liquid cooling plate system. 冷却2 ;

[0081] S2, based on θ obtained in step S1 冷却1 and θ 加热 The size of the immersion system determines the different modes controlled by the controller.

[0082] When θ 冷却1 When the immersion rate is ≥100%, the immersion system enters the immersion cooling mode, and an immersion cooling circuit is formed in the immersion system;

[0083] When 0 < θ 冷却1 When the concentration is less than 100%, the immersion system enters the immersion heat dissipation mode, and an immersion heat dissipation circuit is formed in the immersion system.

[0084] When θ 冷却1 When the value is ≤0, the immersion system enters the immersion self-circulation mode, and an immersion self-circulation loop is formed in the immersion system;

[0085] When θ 加热 When the value is ≥0, the immersion system enters the immersion heating mode, and an immersion heating circuit is formed in the immersion system;

[0086] At the same time, based on θ obtained in step S1 冷却2 The size of the liquid cooling plate system determines its mode, and the controller also controls the liquid cooling plate system to enter different modes.

[0087] When θ 冷却2 When the liquid cooling plate system reaches ≥100%, it enters the liquid cooling plate cooling mode, and a liquid cooling plate cooling circuit is formed in the liquid cooling plate system.

[0088] When 0 < θ 冷却2 When <100%, the liquid cooling plate system enters the liquid cooling plate heat dissipation mode, and a liquid cooling plate heat dissipation circuit is formed in the liquid cooling plate system;

[0089] When θ 冷却2 When the value is ≤0, the liquid cooling plate system enters the liquid cooling plate self-circulation mode, and a liquid cooling plate self-circulation loop is formed in the liquid cooling plate system;

[0090] The first cooling requirement θ 冷却1 Calculated using formula (1):

[0091]

[0092] The heating requirement θ 加热 The result is obtained from formula (2):

[0093]

[0094] Second cooling requirement θ 冷却2 The result is obtained from formula (3):

[0095]

[0096] In the above formula, T 电池模组 The temperature of the battery module; T 液冷板 T represents the temperature of the liquid cooling plate assembly. 设定1 Set the first temperature; T 设定2 The second set temperature; T 设定3 Set the third temperature; T 冷却灵敏度 Cooling sensitivity; preferably T 冷却灵敏度 3℃; T 加热灵敏度 For heating sensitivity, T is preferred. 加热灵敏度 The set temperature is 3℃; the first set temperature T 设定1 Second set temperature T 设定2 Third set temperature T 设定3 It is set by people based on actual needs.

[0097] In this embodiment, a first set temperature T is first manually set according to actual needs. 设定1 Second set temperature T 设定2 Third set temperature T 设定3 Then, the temperature sensor acquires the temperature of the battery module and the temperature of the liquid cooling plate assembly in real time, and the controller quickly and effectively calculates the first cooling requirement θ of the immersion system according to formulas (1)-(3). 冷却1 and heating requirements θ 加热 and the second cooling requirement θ of the liquid cooling plate system. 冷却2The controller quickly adjusts the modes of the immersion system and liquid cooling plate system based on calculation results, adapting in real time to the cooling or heating needs of the battery module and other energy storage components. When the temperature of the battery module or other energy storage components is high, the immersion system or liquid cooling plate system quickly switches to immersion cooling mode or liquid cooling plate cooling mode to ensure timely cooling and prevent heat accumulation from affecting the normal operation of the energy storage equipment. When the temperature of the battery module or other energy storage components is not high, the immersion system or liquid cooling plate system switches to immersion heat dissipation mode or liquid cooling plate heat dissipation mode to avoid wasting cooling load and save energy. When the temperature of the battery module or other energy storage components does not require cooling, the immersion system or liquid cooling plate system switches to immersion self-circulation mode or liquid cooling plate self-circulation mode to further save energy. When the ambient temperature is low, if the temperature of the battery module is low, the immersion system switches to immersion heating mode, the electric heater 28 is turned on, and the heated refrigerant enters the immersion tank 20 to maintain the battery module in the immersion tank 20 at a suitable temperature, ensuring that the battery module can maintain normal operation even at low ambient temperatures.

[0098] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A temperature control system for an energy storage device, the energy storage device comprising a battery module (100) and other energy storage components besides the battery module; characterized in that: The temperature control system includes a controller, a refrigeration system (1), an immersion system (2), and a liquid-cooled plate system (3); the controller is connected to the refrigeration system (1), the immersion system (2), and the liquid-cooled plate system (3) respectively; the refrigeration system (1) is connected to the immersion system (2) through a first plate heat exchanger (4), and the refrigeration system (1) is connected to the liquid-cooled plate system (3) through a second plate heat exchanger (5); the first plate heat exchanger (4) and the second plate heat exchanger (5) are connected in parallel in the refrigeration system (1). The immersion system is equipped with an immersion tank (20), and the liquid cooling plate system (3) is equipped with a liquid cooling plate assembly (30). The battery module (100) is immersed in the immersion tank (20), and at least some of the other energy storage components are in contact with the liquid cooling plate assembly (30). The immersion system (2) has four modes: immersion cooling mode, immersion heat dissipation mode, immersion self-circulation mode, and immersion heating mode. The liquid cooling plate system (3) has three modes: liquid cooling plate cooling mode, liquid cooling plate heat dissipation mode, and liquid cooling plate self-circulation mode. The refrigeration system (1) includes a gas-liquid separator (11), a compressor (12), a condenser (13), a liquid storage tank (14), and a first filter (15) connected in sequence. The cold side inlet (41) of the first plate heat exchanger and the cold side inlet (51) of the second plate heat exchanger are both connected to the first filter (15). The cold side outlet (42) of the first plate heat exchanger and the cold side outlet (52) of the second plate heat exchanger are both connected to the gas-liquid separator (11). A first electronic expansion valve (16) is provided between the first filter (15) and the cold side inlet (41) of the first plate heat exchanger, and a second electronic expansion valve (17) is provided between the first filter (15) and the cold side inlet (51) of the second plate heat exchanger. The immersion system (2) includes an immersion main circuit, an immersion heat dissipation branch circuit, and an immersion heating branch circuit; the immersion main circuit includes a second filter (21), a first expansion tank (22), a first hydraulic pump (23), a first solenoid valve (24), the immersion tank (20), and a second solenoid valve (25) connected in sequence; the hot-side inlet (43) of the first plate heat exchanger is connected to the second solenoid valve (25), and the hot-side outlet (44) of the first plate heat exchanger is connected to the second filter (21); the inlet end of the immersion heat dissipation branch circuit is located between the second solenoid valve (25) and the immersion tank (20), and the outlet end of the immersion heat dissipation branch circuit is located between the hot-side outlet (44) of the first plate heat exchanger and the second filter (21); the immersion heating branch circuit is connected in parallel with the first solenoid valve (24); the immersion heat dissipation branch circuit includes a third solenoid valve (26) and a first radiator (27) arranged in sequence; the immersion heating branch circuit includes an electric heater (28). The liquid-cooled plate system includes a main liquid-cooled plate circuit and a liquid-cooled plate heat dissipation branch circuit. The main liquid-cooled plate circuit includes a third filter (31), a second expansion tank (32), a second hydraulic pump (33), the liquid-cooled plate assembly (30), and a fourth solenoid valve (34) connected in sequence. The hot-side inlet (53) of the second plate heat exchanger is connected to the fourth solenoid valve (34), and the hot-side outlet (54) of the second plate heat exchanger is connected to the third filter (31). The inlet end of the liquid-cooled plate heat dissipation branch circuit is located between the fourth solenoid valve (34) and the liquid-cooled plate assembly (30), and the outlet end of the liquid-cooled plate heat dissipation branch circuit is located between the hot-side outlet (54) of the second plate heat exchanger and the third filter (31). The liquid-cooled plate heat dissipation branch circuit includes a fifth solenoid valve (35) and a second radiator (36) arranged in sequence.

2. The temperature control system for energy storage equipment according to claim 1, characterized in that: Temperature sensors (6) are provided at least at one of the following locations: between the cold side outlet (42) of the first plate heat exchanger and the gas-liquid separator (11); between the cold side outlet (52) of the second plate heat exchanger and the gas-liquid separator (11); between the compressor (12) and the condenser (13); and between the liquid storage tank (14) and the first filter (15). A low-pressure sensor (18) is provided at the inlet end of the compressor (12), and a high-pressure sensor (19) is provided at the outlet end of the compressor (12). A pressure switch (10) is provided between the high-pressure sensor (19) and the condenser (13).

3. The temperature control system for energy storage equipment according to claim 1, characterized in that: A first check valve (29) is provided between the first hydraulic pump (23) and the first solenoid valve (24); a first flow switch (210) is provided between the outlet end of the immersion heat dissipation branch and the second filter (21); a pressure sensor (7) is provided at least one of the following: between the second filter (21) and the first expansion tank (22), between the first check valve (29) and the first solenoid valve (24), and between the second solenoid valve (25) and the immersion tank (20); a temperature sensor (6) is provided at the inlet end and / or outlet end of the immersion tank.

4. The temperature control system for energy storage equipment according to claim 1, characterized in that: When the immersion system enters the immersion cooling mode, the first electronic expansion valve (16), the first solenoid valve (24), and the second solenoid valve (25) are all open, while the third solenoid valve (26) and the electric heater (28) are all closed, forming an immersion cooling circuit in the immersion system (2); when the immersion system enters the immersion heat dissipation mode, the first solenoid valve (24) and the third solenoid valve (26) are all open, while the first electronic expansion valve (16), the second solenoid valve (25), and the electric heater (28) are all closed, forming an immersion heat dissipation circuit in the immersion system (2); when When the immersion system enters the immersion self-circulation mode, the first solenoid valve (24) and the second solenoid valve (25) are both open, and the first electronic expansion valve (16), the third solenoid valve (26) and the electric heater (28) are all closed, forming an immersion self-circulation loop in the immersion system (2); when the immersion system enters the immersion heating mode, the electric heater (28) and the second solenoid valve (25) are both open, and the first electronic expansion valve (16), the first solenoid valve (24) and the third solenoid valve (26) are all closed, forming an immersion heating loop in the immersion system (2).

5. The temperature control system for energy storage equipment according to claim 1, characterized in that: A second check valve (37) is provided between the second hydraulic pump (33) and the liquid cooling plate assembly (30); a second flow switch (38) is provided between the outlet end of the liquid cooling plate heat dissipation branch and the third filter (31); a pressure sensor (7) is provided at least one of the following: between the third filter (31) and the second expansion tank (32), between the second check valve (37) and the liquid cooling plate assembly (30), and between the fourth solenoid valve (34) and the liquid cooling plate assembly (30); a temperature sensor (6) is provided at the inlet end and / or outlet end of the liquid cooling plate assembly (30).

6. The temperature control system for energy storage equipment according to claim 1, characterized in that: When the liquid cooling plate system (3) enters the liquid cooling plate cooling mode, the second electronic expansion valve (17) and the fourth solenoid valve (34) are both open, and the fifth solenoid valve (35) is closed, forming a liquid cooling plate cooling circuit in the liquid cooling plate system (3); when the liquid cooling plate system (3) enters the liquid cooling plate heat dissipation mode, the fifth solenoid valve (35) is open, and the second electronic expansion valve (17) and the fourth solenoid valve (34) are both closed, forming a liquid cooling plate heat dissipation circuit in the liquid cooling plate system (3); when the liquid cooling plate system (3) enters the liquid cooling plate self-circulation mode, the fourth solenoid valve (34) is open, and the second electronic expansion valve (17) and the fifth solenoid valve (35) are both closed, forming a liquid cooling plate self-circulation circuit in the liquid cooling plate system (3).

7. A temperature control method, wherein the temperature control method is used in the temperature control system of the energy storage device according to any one of claims 1-6, the temperature control method comprising the following steps: S1. Real-time acquisition of the first cooling requirement θ of the immersion system. 冷却1 and heating requirements θ 加热 And to obtain the second cooling requirement θ of the liquid cooling plate system in real time. 冷却2 ; S2, based on θ obtained in step S1 冷却1 and θ 加热 The size of the immersion system determines the different modes controlled by the controller. When θ 冷却1 When the concentration is ≥100%, the immersion system enters the immersion cooling mode, and an immersion cooling circuit is formed in the immersion system; When 0 θ 冷却1 When the system reaches 100%, it enters the immersion cooling mode, and an immersion cooling circuit is formed within the system. When θ 冷却1 When the value is ≤0, the immersion system enters the immersion self-circulation mode, and an immersion self-circulation loop is formed in the immersion system; When θ 加热 When the value is ≥0, the immersion system enters the immersion heating mode, and an immersion heating circuit is formed in the immersion system; At the same time, based on θ obtained in step S1 冷却2 The size of the liquid cooling plate system determines its mode, and the controller also controls the liquid cooling plate system to enter different modes. When θ 冷却2 When the liquid cooling plate system reaches ≥100%, it enters the liquid cooling plate cooling mode, and a liquid cooling plate cooling circuit is formed in the liquid cooling plate system. When 0 θ 冷却2 When the liquid cooling plate system reaches 100%, it enters the liquid cooling plate heat dissipation mode, and a liquid cooling plate heat dissipation circuit is formed in the liquid cooling plate system. When θ 冷却2 When the value is ≤0, the liquid cooling plate system enters the liquid cooling plate self-circulation mode, and a liquid cooling plate self-circulation loop is formed in the liquid cooling plate system; The first cooling requirement θ 冷却1 The result is obtained from formula (1): （1） The heating requirement θ 加热 The result is obtained from formula (2): （2） Second cooling requirement θ 冷却2 The result is obtained from formula (3): （3） In the above formula, T 电池模组 The temperature of the battery module; T 液冷板 T represents the temperature of the liquid cooling plate assembly. 设定1 Set the first temperature; T 设定2 The second set temperature; T 设定3 Set the third temperature; T 冷却灵敏度 For cooling sensitivity; T 加热灵敏度 This refers to heating sensitivity.

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