Heat management method for air-cooled energy storage system

Abstract

The invention discloses a heat management method for an air-cooled energy storage system, which is characterized in that the energy storage system adopts a battery module without a fan, the battery module is provided with a secondary BMS system, the secondary BMS system collects the temperature parameters of the battery module and transmits the data parameters to a primary BMS system of the energy storage system, the primary BMS system collects and processes the temperature parameters of the whole cluster and transmits the temperature parameters to RTC0, and the RTC0 is connected with the RTC0; temperature parameters are set in the RTCO, after the energy storage system is powered on, the energy storage system is divided into a standing state and an operation / standby state according to operation modes of the energy storage system, and different logics and parameters are adopted for control in the two modes. The method has the beneficial effects that after the battery cell temperature data collected by the BMS is processed by the RTC0, the operation mode of the air conditioning system is controlled, different air conditioning operation modes are adopted under different working conditions according to the parameters such as the operation state of the energy storage system and the battery temperature, and the problem that after a battery module fan is cancelled, the battery module fan is damaged is solved. And the heat dissipation and temperature equalization effects of the battery module are effectively met.

Description

Technical Field

[0001] The present invention relates to the field of thermal management technology, and in particular to a thermal management method for an air-cooled energy storage system. Background Art

[0002] In existing air-cooled energy storage systems, pack fans and air conditioners use traditional independent control strategies, such as Figure 2 As shown, the pack fan is controlled to start and stop according to the battery cell temperature or battery cell temperature difference. Figure 1 The energy storage system is divided into operating mode and static mode, and different air conditioning logic methods are used in the two modes. When the system is running, the air conditioner automatically adopts heating mode and cooling mode according to the return air temperature; when the system is static, the air conditioner selects heating mode, cooling mode, and dehumidification mode according to the return air temperature.

[0003] In patent CN202410397341, an air-cooled energy storage system and a thermal management method are disclosed. Figure 3 As shown, the temperature control strategy of the energy storage system is adjusted to use the battery cell temperature as the target temperature, and the air conditioner is controlled to start and stop according to the temperature of the battery cell, thus avoiding the shortcomings of the first system temperature control strategy.

[0004] However, both of the above temperature control methods need to be coordinated with the cooling solution of the battery module with a fan, which is cumbersome to set up and has high cost. In addition, in the first thermal management control strategy, two relatively independent control logics are used, which are unrelated to each other and do not need to be controlled by BMS and RTC0 for thermal management. This thermal management method uses the internal air temperature as the target parameter, which leads to large temperature fluctuations and temperature differences in the battery. The air conditioner runs for a long time, which is not conducive to energy saving of the system. In the second thermal management control strategy, the battery module cannot be equalized in advance, and the temperature difference of the battery module is large, which has a great impact on the life and capacity of the battery. Moreover, when the energy storage system directly gives a cooling command to the air conditioner, the air conditioner starts the fan first and then starts the compressor. This time is relatively slow, resulting in excessive temperature rise of the battery cell, which is not conducive to heat dissipation.

[0005] Therefore, there is an urgent need for a heat dissipation solution that does not require a fan for the battery module and at the same time can meet the thermal management method of heat dissipation and temperature equalization of the battery module. Summary of the invention

[0006] In order to solve the above problems, especially to address the deficiencies in the prior art, the present invention provides a thermal management method for an air-cooled energy storage system that can solve the above problems.

[0007] To achieve the above purpose, the present invention adopts the following technical means:

[0008] A thermal management method for an air-cooled energy storage system is used to perform thermal management control on a battery module in the air-cooled energy storage system. The method comprises:

[0009] The energy storage system uses a battery module without a fan. There is a secondary BMS system on the battery module. The secondary BMS system collects the temperature parameters of the battery module and passes the data parameters to the primary BMS system of the energy storage system. The primary BMS system collects and processes the temperature parameters of the entire cluster and passes them to RTC0. The temperature parameters are set in the RTCO software. The temperature parameters include T cell，max , T cell，ave , ΔT cell , T air ,

[0010] Among them, T cell，max is the maximum temperature of the battery cell in the battery module;

[0011] T cell，ave is the average temperature of the cells in the battery module;

[0012] ΔT cell The temperature difference of the battery cells in the battery module is extremely large;

[0013] T air is the return air temperature of the air conditioner;

[0014] After the energy storage system is powered on, it is first divided into a static state and a running / standby state according to the operation mode of the energy storage system. Different logics and parameters are used for control in the two modes. The specific control methods are as follows;

[0015] The energy storage system is in a static state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control:

[0016] When T cell，ave When the temperature reaches the preset value 101, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 102, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner.

[0017] When T cell，ave >When the preset value is 101, the temperature difference ΔT of the battery cell cell Determine whether air conditioning is needed. Air supply can reduce the temperature difference between the cells, ΔT cell ≥ preset value 201, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode. cell When it decreases to the preset value of 202, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the air supply mode;

[0018] When ΔTcell < preset value 201, then according to T cell，max Determine whether the energy storage system needs cooling. When T cell，max ≥ preset value 301, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. cell，max When it drops to the preset value 302, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode;

[0019] When T cell，max When the preset value is less than 301, it is also necessary to adjust the air To determine whether the energy storage system needs cooling, when T air ≥ preset value 401, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. air When it drops to the preset value 402, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode;

[0020] When T air When the humidity is less than the preset value of 401, the energy storage system performs humidity control. When the humidity is greater than or equal to the preset value of 501, T air When the humidity is ≥ the preset value 502, the energy storage system sends a dehumidification mode command to the air conditioner through the RTC0 software to turn on the dehumidification. When the humidity drops to the preset value 503, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the dehumidification mode.

[0021] The energy storage system is in operation or standby state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control:

[0022] When T cell，ave When the temperature reaches the preset value 103, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 104, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner.

[0023] When T cell，ave >When the preset value is 103, first according to T cell，max Make judgments, when T cell，max ≤ preset value 303, then you also need to look at ΔT cell Whether it exceeds the preset value 203, when ΔT cell ≥ preset value 203, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode; when ΔT cell When the preset value is less than 203, the energy storage system sends a shutdown mode to the air conditioner through the RTC0 software;

[0024] When T cell，max> When the preset value is 303, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode; if T cell，max When it drops to the preset value 304, the energy storage system sends a shutdown command to the air conditioner through the RTC0 software to turn off the air supply mode; if T cell，max When it rises to 305, the energy storage system sends a cooling mode command or an automatic mode command to the air conditioner through the RTC0 software to start the cooling mode. At this time, if it is a fixed-frequency energy storage system, select the cooling mode, if it is a variable-frequency energy storage system, select the automatic mode. cell，max When it drops to the preset value 306, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software, turns off the compressor cooling, and starts ventilation; if T cell，max The value is maintained between the preset value 304 and the preset value 305, and the air conditioner is always in the air supply mode.

[0025] A further solution of the present invention is that the temperature values ​​of the preset value 101 and the preset value 102 are both 0-15° C., and the preset value 102 is greater than the preset value 101.

[0026] A further solution of the present invention is that the temperature values ​​of the preset value 201, the preset value 202, and the preset value 203 are all 6-15°C, and the preset value 201>preset value 202>preset value 203.

[0027] A further solution of the present invention is that the temperature values ​​of the preset value 301 and the preset value 302 are both 25-45° C., and the preset value 301 is greater than the preset value 302 .

[0028] A further solution of the present invention is that the temperature values ​​of the preset value 401 and the preset value 402 are both 35-45° C., and the preset value 401 is greater than the preset value 402.

[0029] A further solution of the present invention is that the humidity preset values ​​of the preset value 501 and the preset value 503 are both 50%-90%, and the preset value 501>preset value 503.

[0030] A further solution of the present invention is that the temperature values ​​of the preset value 103 and the preset value 104 are both 0-15° C., and the preset value 104 is greater than the preset value 103.

[0031] A further solution of the present invention is that the temperature values ​​of the preset value 304, the preset value 303, the preset value 306, and the preset value 305 are all 25-40°C, and the preset value 304 is less than the preset value 303 and the preset value 306 is less than the preset value 305.

[0032] Beneficial effects of the present invention:

[0033] The present invention collects the battery cell temperature data through the BMS system, and controls the operation mode of the air-conditioning system after RTC0 processing. Different air-conditioning operation modes are adopted under different working conditions according to parameters such as the operation status of the energy storage system and the battery temperature. This solves the problem of effectively meeting the heat dissipation and temperature equalization effects of the battery module after the battery module fan is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the temperature control logic diagram of the existing air conditioner;

[0035] Figure 2 Provide a logic diagram for the fan operation of the existing battery module;

[0036] Figure 3 This is a thermal management temperature control strategy diagram for existing energy storage systems;

[0037] Figure 4 It is the temperature control logic diagram of the present invention. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 4 As shown, a thermal management method for an air-cooled energy storage system is used to perform thermal management control on a battery module in the air-cooled energy storage system. The method comprises:

[0040] The energy storage system uses a battery module without a fan. There is a secondary BMS system on the battery module. The secondary BMS system collects the temperature parameters of the battery module and passes the data parameters to the primary BMS system of the energy storage system. The primary BMS system collects and processes the temperature parameters of the entire cluster and passes them to RTC0. The temperature parameters are set in the RTCO software. The temperature parameters include T cell，max 、T cell，ave , ΔT cell 、T air ,

[0041] Among them, T cell，max is the maximum temperature of the battery cell in the battery module;

[0042] T cell，ave is the average temperature of the cells in the battery module;

[0043] ΔT cell The temperature difference of the battery cells in the battery module is extremely large;

[0044] Tair is the return air temperature of the air conditioner;

[0045] After the energy storage system is powered on, it is first divided into a static state and a running / standby state according to the operation mode of the energy storage system. Different logics and parameters are used for control in the two modes. The specific control methods are as follows;

[0046] The energy storage system is in a static state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control:

[0047] When T cell，ave When the temperature reaches the preset value 101, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 102, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner.

[0048] When T cell，ave >When the preset value is 101, the temperature difference ΔT of the battery cell cell Determine whether air conditioning is needed. Air supply can reduce the temperature difference between the cells, ΔT cell ≥ preset value 201, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode. cell When it decreases to the preset value of 202, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the air supply mode;

[0049] When ΔT cell < preset value 201, then according to T cell，max Determine whether the energy storage system needs cooling. When T cell，max ≥ preset value 301, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. cell，max When it drops to the preset value 302, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode;

[0050] When T cell，max When the preset value is less than 301, it is also necessary to adjust the air To determine whether the energy storage system needs cooling, when T air ≥ preset value 401, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. air When it drops to the preset value 402, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode;

[0051] When T air When the humidity is less than the preset value of 401, the energy storage system performs humidity control. When the humidity is greater than or equal to the preset value of 501, T airWhen the humidity is ≥ the preset value 502, the energy storage system sends a dehumidification mode command to the air conditioner through the RTC0 software to turn on the dehumidification. When the humidity drops to the preset value 503, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the dehumidification mode.

[0052] The energy storage system is in operation or standby state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control:

[0053] When T cell，ave When the temperature reaches the preset value 103, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 104, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner.

[0054] When T cell，ave >When the preset value is 103, first according to T cell，max Make judgments, when T cell，max ≤ preset value 303, then you also need to look at ΔT cell Whether it exceeds the preset value 203, when ΔT cell ≥ preset value 203, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode; when ΔT cell When the preset value is less than 203, the energy storage system sends a shutdown mode to the air conditioner through the RTC0 software;

[0055] When T cell，max > When the preset value is 303, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode; if T cell，max When it drops to the preset value 304, the energy storage system sends a shutdown command to the air conditioner through the RTC0 software to turn off the air supply mode; if T cell，max When it rises to 305, the energy storage system sends a cooling mode command or an automatic mode command to the air conditioner through the RTC0 software to start the cooling mode. At this time, if it is a fixed-frequency energy storage system, select the cooling mode, if it is a variable-frequency energy storage system, select the automatic mode. cell，max When it drops to the preset value 306, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software, turns off the compressor cooling, and starts ventilation; if T cell，max The value is maintained between the preset value 304 and the preset value 305, and the air conditioner is always in the air supply mode.

[0056] The temperature values ​​of the preset value 101 and the preset value 102 are both 0-15°C, and the preset value 102> the preset value 101. When the battery is below 0°C, the battery cannot be charged and the discharge efficiency is also relatively low, so the battery needs to be kept above 0°C.

[0057] The temperature values ​​of preset value 201, preset value 202, and preset value 203 are all 6-15°C, and preset value 201>preset value 202>preset value 203. The temperature difference preset value cannot be too large or too small, and needs to be within a suitable range; because if the temperature difference is too large, it will affect the voltage deviation of the battery cell and the capacity of the battery cell; if the temperature difference is too small, it is difficult to reach this target value through the air supply mode, resulting in the air conditioner being in the air supply state all the time.

[0058] The temperature values ​​of the preset value 301 and the preset value 302 are both 25-45° C., and the preset value 301> the preset value 302. The charging and discharging efficiency of the battery cell is relatively high within this range. If it exceeds this range, the battery cell is in the derating protection range.

[0059] The temperature values ​​of preset value 401 and preset value 402 are both 35-45°C, and preset value 401>preset value 402. When the return air temperature of the air conditioner is within this range, the starting current is still within the protection range. When it exceeds 45°C, the heat load of the air conditioner becomes larger, and it is easy to cause high exhaust pressure and large starting current when the air conditioner is started, thereby causing air conditioner protection. This logic protects the normal operation of the air conditioner.

[0060] The humidity preset values ​​of preset value 501 and preset value 503 are both 50%-90%, and preset value 501>preset value 503. If the humidity inside the energy storage system is too high, condensation is likely to occur, which brings unsafe risks to the live components; if the humidity target is too low, the dehumidification effect becomes poor, and the air conditioner is always in dehumidification mode, which is not conducive to energy saving.

[0061] The temperature values ​​of the preset value 103 and the preset value 104 are both 0-15°C, and the preset value 104> the preset value 103. When the battery is below 0°C, the battery cannot be charged and the discharge efficiency is also relatively low, so the battery needs to be kept above 0°C.

[0062] The temperature values ​​of preset value 304, preset value 303, preset value 306 and preset value 305 are all 25-40°C, and preset value 304<preset value 303<preset value 306<preset value 305. The charging and discharging efficiency of the battery cell is high within this range. If it exceeds this range, the battery cell is in the derating protection range.

[0063] Implementation Examples

[0064] A thermal management method for an air-cooled energy storage system is used to perform thermal management control on a battery module in the air-cooled energy storage system. The method comprises:

[0065] The energy storage system uses a battery module without a fan. There is a secondary BMS system on the battery module. The secondary BMS system collects the temperature parameters of the battery module and passes the data parameters to the primary BMS system of the energy storage system. The primary BMS system collects and processes the temperature parameters of the entire cluster and passes them to RTC0. The temperature parameters are set in the RTCO software. The temperature parameters include T cell，max , T cell，ave , ΔT cell , T air ,

[0066] Among them, T cell，max is the maximum temperature of the battery cell in the battery module;

[0067] T cell，ave is the average temperature of the cells in the battery module;

[0068] ΔT cell The temperature difference of the battery cells in the battery module is extremely large;

[0069] T air is the return air temperature of the air conditioner;

[0070] The preset values ​​are set in the RTCO software. The specific settings are as follows:

[0071] The preset value 101 is 5°C, the preset value 102 is 0°C, the preset value 103 is 0°C, and the preset value 104 is 10°C;

[0072] The preset value 201 is 15°C, the preset value 202 is 10°C, and the preset value 203 is 6°C;

[0073] The preset value 301 is 40°C, the preset value 302 is 35°C, the preset value 303 is 28°C, the preset value 304 is 26°C, the preset value 305 is 33°C, and the preset value 306 is 30°C;

[0074] The preset value 401 is 40°C, and the preset value 402 is 35°C;

[0075] The preset value 501 is 85%, 502 is 40°C, and the preset value 503 is 70%;

[0076] After the energy storage system is powered on, it is first divided into a static state and a running / standby state according to the operation mode of the energy storage system. Different logics and parameters are used for control in the two modes. The specific control methods are as follows;

[0077] The energy storage system is in a static state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control:

[0078] When T cell，aveWhen the temperature reaches the preset value 101, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 102, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner.

[0079] When T cell，ave >When the preset value is 101, the temperature difference ΔT of the battery cell cell Determine whether air conditioning is needed. Air supply can reduce the temperature difference between the cells, ΔT cell ≥ preset value 201, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode. cell When it decreases to the preset value of 202, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the air supply mode;

[0080] When ΔT cell < preset value 201, then according to T cell，max Determine whether the energy storage system needs cooling. When T cell，max ≥ preset value 301, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. cell，max When it drops to the preset value 302, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode;

[0081] When T cell，max When the preset value is less than 301, it is also necessary to adjust the air To determine whether the energy storage system needs cooling, when T air ≥ preset value 401, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. air When it drops to the preset value 402, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode;

[0082] When T air When the humidity is less than the preset value of 401, the energy storage system performs humidity control. When the humidity is greater than or equal to the preset value of 501, T air When the humidity is ≥ the preset value 502, the energy storage system sends a dehumidification mode command to the air conditioner through the RTC0 software to turn on the dehumidification. When the humidity drops to the preset value 503, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the dehumidification mode.

[0083] The energy storage system is in operation or standby state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control:

[0084] When T cell，aveWhen the temperature reaches the preset value 103, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 104, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner.

[0085] When T cell，ave >When the preset value is 103, first cell，max Make judgments, when T cell，max ≤ preset value 303, then you also need to look at ΔT cell Whether it exceeds the preset value 203, when ΔT cell ≥ preset value 203, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode; when ΔT cell When the preset value is less than 203, the energy storage system sends a shutdown mode to the air conditioner through the RTC0 software;

[0086] When T cell，max > When the preset value is 303, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode; if T cell，max When it drops to the preset value 304, the energy storage system sends a shutdown command to the air conditioner through the RTC0 software to turn off the air supply mode; if T cell，max When it rises to 305, the energy storage system sends a cooling mode command or an automatic mode command to the air conditioner through the RTC0 software to start the cooling mode. At this time, if it is a fixed-frequency energy storage system, select the cooling mode, if it is a variable-frequency energy storage system, select the automatic mode. cell，max When it drops to the preset value 306, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software, turns off the compressor cooling, and starts ventilation; if T cell，max The value is maintained between the preset value 304 and the preset value 305, and the air conditioner is always in the air supply mode.

[0087] The examples given in the present invention are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A thermal management method for an air-cooled energy storage system, used for thermal management control of a battery module in the air-cooled energy storage system, characterized in that: The method includes: The energy storage system uses a battery module without a fan. There is a secondary BMS system on the battery module. The secondary BMS system collects the temperature parameters of the battery module and passes the data parameters to the primary BMS system of the energy storage system. The primary BMS system collects and processes the temperature parameters of the entire cluster and passes them to RTC0. The temperature parameters are set in the RTCO software. The temperature parameters include T cell，max , T cell，ave , ΔT cell , T air , Among them, T cell，max is the maximum temperature of the battery cell in the battery module; T cell，ave is the average temperature of the cells in the battery module; ΔT cell The temperature difference of the battery cells in the battery module is extremely large; T air is the return air temperature of the air conditioner; After the energy storage system is powered on, it is first divided into a static state and a running / standby state according to the operation mode of the energy storage system. Different logics and parameters are used for control in the two modes. The specific control methods are as follows; The energy storage system is in a static state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control: When T cell，ave When the temperature reaches the preset value 101, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 102, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner. When T cell，ave >When the preset value is 101, the temperature difference ΔT of the battery cell cell Determine whether air conditioning is needed. Air supply can reduce the temperature difference between the cells, ΔT cell ≥ preset value 201, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode. cell When it decreases to the preset value of 202, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the air supply mode; When ΔT cell < preset value 201, then according to T cell，max Determine whether the energy storage system needs cooling. When T cell，max ≥ preset value 301, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. cell，max When it drops to the preset value 302, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode; When T cell，max When the preset value is less than 301, it is also necessary to adjust the air To determine whether the energy storage system needs cooling, when T air ≥ preset value 401, the energy storage system sends a cooling mode command to the air conditioner through the RTC0 software to turn on the cooling mode. air When it drops to the preset value 402, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the cooling mode; When T air When the humidity is less than the preset value of 401, the energy storage system performs humidity control. When the humidity is greater than or equal to the preset value of 501, T air When the humidity is ≥ the preset value 502, the energy storage system sends a dehumidification mode command to the air conditioner through the RTC0 software to turn on the dehumidification. When the humidity drops to the preset value 503, the energy storage system sends a standby mode command to the air conditioner through the RTC0 software to turn off the dehumidification mode. The energy storage system is in operation or standby state. The temperature data collected by RTC0 is used to determine whether the battery module needs thermal management control: When T cell，ave When the temperature reaches the preset value 103, the energy storage system sends a heating mode command to the air conditioner through the RTC0 software to turn on the heating mode. When the temperature reaches the preset value 104, the energy storage system sends a standby mode command through the RTC0 software to turn off the heating mode of the air conditioner. When T cell，ave >When the preset value is 103, first according to T cell，max Make judgments, when T cell，max ≤ preset value 303, then you also need to look at ΔT cell Whether it exceeds the preset value 203, when ΔT cell ≥ preset value 203, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to start the ventilation mode; when ΔT cell When the preset value is less than 203, the energy storage system sends a shutdown mode to the air conditioner through the RTC0 software; When T cell，max >When the preset value is 303, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software to turn on the ventilation mode; if T cell，max When it drops to the preset value 304, the energy storage system sends a shutdown command to the air conditioner through the RTC0 software to turn off the air supply mode; if T cell，max When it rises to 305, the energy storage system sends a cooling mode command or an automatic mode command to the air conditioner through the RTCO software to start the cooling mode. At this time, if it is a fixed-frequency energy storage system, select the cooling mode, if it is a variable-frequency energy storage system, select the automatic mode. cell，max When it drops to the preset value 306, the energy storage system sends a ventilation mode command to the air conditioner through the RTC0 software, turns off the compressor cooling, and starts ventilation; if T cell，max The value is maintained between the preset value 304 and the preset value 305, and the air conditioner is always in the air supply mode.

2. A thermal management method for an air-cooled energy storage system according to claim 1, characterized in that: The temperature values ​​of the preset value 101 and the preset value 102 are both 0-15° C., and the preset value 102 is greater than the preset value 101.

3. A thermal management method for an air-cooled energy storage system according to claim 1, characterized in that: The temperature values ​​of the preset value 201, the preset value 202, and the preset value 203 are all 6-15°C, and the preset value 201>the preset value 202>the preset value 203.

4. A thermal management method for an air-cooled energy storage system according to claim 1, characterized in that: The temperature values ​​of the preset value 301 and the preset value 302 are both 25-45° C., and the preset value 301 is greater than the preset value 302 .

5. A thermal management method for an air-cooled energy storage system according to claim 1, characterized in that: The temperature values ​​of the preset value 401 and the preset value 402 are both 35-45° C., and the preset value 401 is greater than the preset value 402 .

6. A thermal management method for an air-cooled energy storage system according to claim 1, characterized in that: The humidity preset values ​​of the preset value 501 and the preset value 503 are both 50%-90%, and the preset value 501 is greater than the preset value 503.

7. A thermal management method for an air-cooled energy storage system according to claim 1, characterized in that: The temperature values ​​of the preset value 103 and the preset value 104 are both 0-15° C., and the preset value 104 is greater than the preset value 103 .

8. A thermal management method for an air-cooled energy storage system according to claim 1, characterized in that: The temperature values ​​of the preset value 304 , the preset value 303 , the preset value 306 , and the preset value 305 are all 25-40° C., and the preset value 304 is less than the preset value 303 and the preset value 306 is less than the preset value 305 .

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