A kind of air-cooled energy storage system and thermal management method

Abstract

The present invention discloses an air-cooled energy storage system and a thermal management method. The present invention is provided with a guide plate and a vertical partition. The guide plate is added in the air supply duct shell of the air conditioner to rectify the airflow in the air supply duct shell of the air conditioner, so that the outflowing airflow is smooth and evenly distributed, and a vertical partition is added in the static pressure cavity to divide the static pressure cavity of the original energy storage system box inner cavity into two left and right ones, and the airflows in the static pressure cavities on both sides do not interfere with each other, so that the airflow after the rectification by the front air duct is avoided to have secondary turbulence, so that the airflow drawn into the battery modules on the left and right sides is more uniform, and the airflow optimization use effect is good; the present invention adopts a new thermal management temperature control method and sets reasonable preset value parameters, so that the system can operate reasonably, and in the static mode, the standby power consumption is reduced, or unnecessary single operation mode of the fan is avoided, or the refrigeration power consumption is wasted, so as to improve the efficiency and achieve the purpose of energy saving.

Description

Technical Field

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

[0002] In existing air-cooled energy storage products, the air flow cooled by the air conditioner evaporator is sent into the free cavity by the air conditioner air outlet, and the internal cavity of the energy storage cabinet is used for unconstrained air supply. The cavity forms an independent static pressure cavity, and then the battery module fan draws it into the battery pack to dissipate heat for the battery module and battery cell. At the same time, in the air-cooled energy storage system, the traditional independent control strategy is adopted. The air conditioner judges the start and stop of the air conditioner according to the return air temperature to realize automatic heating and cooling functions. The battery module controls the start and stop of the module fan according to the temperature and temperature difference of the battery cell. The start and stop of the air conditioner and the start and stop of the module fan are two relatively independent control strategies.

[0003] The cold air sent out by the air conditioner evaporator flows in the cavity between the cabinet and the battery module at the rear of the energy storage cabinet, which is prone to eddy currents. Since the air conditioner fan uses a centrifugal fan, the air supply from the air conditioner outlet is uneven, which causes interference with the air flow in the rear cavity, causing large deviations in the air intake of each battery module. The temperature deviation between the battery modules will increase, and at the same time, the temperature difference between the batteries inside the battery module with a small air intake will also increase. Using the traditional thermal management control strategy, the air conditioner setting target is the return air temperature, not the battery cell temperature. The temperature of the battery cell fluctuates greatly during the entire charging and discharging process, and there may even be an increase in the temperature difference. Using an independent thermal management temperature control method, the air conditioner and battery module fan will have an invalid operating mode, which is not conducive to the energy saving of the energy storage system, increases the auxiliary power consumption, and reduces the efficiency of the energy storage system.

[0004] Based on the above reasons, the present invention proposes an air-cooled energy storage system and a thermal management method. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention is provided with guide plates and vertical partitions, and guide plates are added in the air supply duct shell of the air conditioner to rectify the airflow in the air supply duct shell of the air conditioner, so that the outflowing airflow is smooth and evenly distributed, and vertical partitions are added in the static pressure cavity, so that the original static pressure cavity in the inner cavity of the energy storage system box is divided into two left and right ones, and the airflows in the static pressure cavities on both sides do not interfere with each other, thereby avoiding secondary turbulence of the airflow after rectification by the front air duct, so that the airflow drawn into the battery modules on the left and right sides is more uniform, and the airflow optimization use effect is good; the present invention adopts a new thermal management temperature control method and sets reasonable preset value parameters, so as to make the system operate reasonably, and in the static mode, reduce the standby power consumption, or avoid unnecessary single operation mode of the fan, or waste refrigeration power consumption, improve efficiency, and achieve the purpose of energy saving.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an air-cooled energy storage system, comprising an energy storage system case, two door panels symmetrically and movably connected on the front side wall of the energy storage system case, a bottom shell fixedly connected to the lower side of the energy storage system case, a mounting frame is provided in the inner cavity of the energy storage system case, a vertical partition is fixedly connected to the center of the front side wall of the mounting frame, an air conditioner is fixedly connected to the top surface of the energy storage system case, a mounting plate is installed on the lower side of the air conditioner, the mounting plate is fixedly connected to the energy storage system case, an air supply port and a return air port are provided on the mounting plate, an air supply duct shell is fixedly connected to the mounting plate located at the lower side of the air supply port, a baffle is fixedly connected to the front side of the air supply duct shell, and four guide vanes are fixedly connected to the inner cavity of the air supply duct shell.

[0009] Preferably, the two guide vanes on the left are bent toward the left side, and the two guide vanes on the right are bent toward the right side. A partition is fixedly connected in the middle of the four guide vanes. The partition is fixedly connected to the mounting frame. The partition and the two guide vanes on the right are located at the lower side of the air outlet.

[0010] Preferably, the mounting frame includes a plurality of vertical plates, a plurality of side plates are evenly distributed and fixedly connected from top to bottom between two adjacent front and rear vertical plates, a plurality of vertical plates on the same front and rear side are evenly distributed and fixedly connected from top to bottom with a plurality of cross plates, the cross plates are fixedly connected to the side plates, and the vertical partitions are fixedly connected to the vertical plates at the center of the front side.

[0011] Preferably, the vertical partition includes a connecting plate, the connecting plate has a T-shaped cross-section, a slot is provided on the rear side wall of the connecting plate, the slot and the vertical plate are matched with each other, a plurality of fixing bolts are evenly distributed and threadedly connected on the side wall of the connecting plate, a movable shell is movably connected to the front side wall of the connecting plate, a plurality of springs are evenly distributed and fixedly connected to the inner side wall of the movable shell, the other end of the spring is fixedly connected to the front side wall of the connecting plate, and a sealing gasket is fixedly connected to the front side wall of the movable shell.

[0012] Preferably, a fixing ring is fixedly connected to the top surface of the air conditioner, and two fixing rings are symmetrically arranged on the left and right.

[0013] A thermal management method for an air-cooled energy storage system further includes the following steps:

[0014] S1: The energy storage battery module of the energy storage system is fixedly mounted on the mounting frame, and a temperature monitoring device is installed in the energy storage system box to realize the real-time monitoring function of the battery cell temperature of the battery module. During operation, the operation state of the energy storage system is divided into a system operation mode and a static / standby mode, and preset parameters are set so that different parameter controls are adopted in the two modes;

[0015] S2: When the energy storage system is in system operation mode, when the maximum temperature of the battery cells in all battery modules is greater than or equal to the preset value of 27 or the difference between the maximum temperature and the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset temperature difference value 2, the battery module fan is turned on to cool the battery cells, otherwise the battery module fan is turned off;

[0016] S3: When the minimum temperature of the battery cells in all battery modules is less than or equal to the preset value 21 of the battery cells, the air conditioning heating mode is started, and when the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset value 22 of the battery cells, the air conditioning heating mode is turned off;

[0017] S4: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 21, and when the maximum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 23, the air conditioning cooling mode is started, and the air conditioning cooling mode is turned off when the maximum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 24;

[0018] S5: When the energy storage system is in the system standby mode, when the maximum temperature of the battery cells in all battery modules is greater than or equal to the preset value of 17 or the difference between the maximum temperature and the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset temperature difference value 1, the battery module fan is turned on to cool the battery cells, otherwise the battery module fan is turned off;

[0019] S6: When the minimum temperature of the battery cells in all battery modules is less than or equal to the preset value 11 of the battery cells, the air conditioning heating mode is started, and when the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset value 12 of the battery cells, the air conditioning heating mode is turned off;

[0020] S7: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 11, and the maximum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 13, the air conditioning cooling mode is started, and the air conditioning cooling mode is turned off when the minimum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 14;

[0021] S8: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 11, and the maximum temperature of the battery cells in all battery modules is less than the battery cell preset value 13, the dehumidification conditions are met, and the air conditioning dehumidification function is started until the collected data meets the humidity preset value, and the air conditioning dehumidification function is turned off.

[0022] Preferably, for the battery module fan control situation, when setting the preset parameters, it is necessary to ensure that: the temperature difference preset value 1 is greater than the temperature difference preset value 2, and the battery cell preset value 17 is greater than the battery cell preset value 27.

[0023] Preferably, for the heating control situation, when setting the preset parameters, it is necessary to ensure that: the battery cell preset value 11 is greater than the battery cell preset value 12, and the battery cell preset value 21 is greater than the battery cell preset value 22.

[0024] Preferably, for the refrigeration control situation, when setting the preset parameters, it is necessary to ensure that: the battery cell preset value 23 is greater than the battery cell preset value 24, greater than the battery cell preset value 13, greater than the battery cell preset value 14, greater than the battery cell preset value 27, and greater than the battery cell preset value 17.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides an air-cooled energy storage system and a thermal management method, which have the following beneficial effects:

[0027] 1. The present invention is provided with a guide plate and a vertical partition, and the guide plate is added in the air supply duct shell of the air conditioner to rectify the airflow in the air supply duct shell of the air conditioner, so that the outflowing airflow is smooth and evenly distributed, and a vertical partition is added in the static pressure cavity, so that the original static pressure cavity in the inner cavity of the energy storage system box is divided into two left and right, and the airflows in the static pressure cavities on both sides do not interfere with each other, avoiding secondary turbulence of the airflow after rectification by the front side air duct, so that the airflow drawn into the battery modules on the left and right sides is more uniform, and the airflow optimization effect is good;

[0028] 2. The present invention adopts a new thermal management temperature control method and sets reasonable preset value parameters, which can make the system operate reasonably and reduce standby power consumption in static mode, or avoid unnecessary fan single operation mode or waste of refrigeration power consumption, thereby improving efficiency and achieving energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure inside the box of the energy storage system of the present invention;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting frame of the present invention;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure on the mounting plate of the present invention;

[0034] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the air supply duct shell of the present invention;

[0035] Figure 7 It is a schematic diagram of the overall three-dimensional structure of the vertical partition of the present invention;

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure inside the vertical partition of the present invention;

[0037] Fig. 9 This is the thermal management temperature control logic of the energy storage system of the present invention.

[0038] In the figure: 1. Energy storage system box; 2. Door panel; 3. Bottom shell; 4. Mounting frame; 5. Vertical partition; 6. Air conditioner; 7. Mounting plate; 8. Air supply port; 9. Return air port; 10. Air supply duct shell; 11. Baffle; 12. Guide vane; 13. Partition; 14. Vertical plate; 15. Side plate; 16. Horizontal plate; 17. Fixing ring; 18. Connecting plate; 19. Slot; 20. Fixing bolt; 21. Movable shell; 22. Spring; 23. Sealing gasket. DETAILED DESCRIPTION

[0039] In order to better understand the purpose, structure and function of the present invention, and to achieve efficient heat dissipation and thermal management of the energy storage system, the present invention is provided with guide plates and vertical partitions, and by adding guide plates in the air supply duct shell of the air conditioner, the airflow is rectified in the air supply duct shell of the air conditioner, so that the outflowing airflow is smooth and evenly distributed, and a vertical partition is added in the static pressure cavity, so that the static pressure cavity of the original energy storage system box inner cavity is divided into two left and right, and the airflows in the static pressure cavities on both sides do not interfere with each other, avoiding secondary turbulence of the airflow after rectification by the front air duct, making the airflow drawn into the battery modules on the left and right sides more uniform, and the airflow optimization effect is good; the present invention adopts a new thermal management temperature control method, sets reasonable preset value parameters, can make the system operate reasonably, and in the static mode, reduce standby power consumption, or avoid unnecessary fan single operation mode, or waste refrigeration power consumption, improve efficiency, and achieve the purpose of energy saving. A wind-cooled energy storage system and thermal management method of the present invention are further described in detail.

[0040] refer to Figure 1-8 The present invention: an air-cooled energy storage system, comprising an energy storage system box 1, characterized in that two door panels 2 are symmetrically and movably connected on the front side wall of the energy storage system box 1, a bottom shell 3 is fixedly connected to the lower side of the energy storage system box 1, and a mounting frame 4 is provided in the inner cavity of the energy storage system box 1, and the mounting frame 4 comprises a plurality of vertical plates 14, a plurality of side plates 15 are evenly distributed and fixedly connected from top to bottom between two adjacent vertical plates 14 in the front and rear, a plurality of vertical plates 14 on the same side in the front and rear are evenly distributed and fixedly connected from top to bottom with a plurality of horizontal plates 16, the horizontal plates 16 are fixedly connected to the side plates 15, and the vertical partitions 5 are fixedly connected to the vertical plates 14 at the center of the front side, so as to realize the installation and fixation of the battery module and realize the function of the energy storage system;

[0041] A vertical partition 5 is fixedly connected to the center of the front side wall of the mounting frame 4. The vertical partition 5 includes a connecting plate 18. The cross section of the connecting plate 18 is T-shaped. A slot 19 is provided on the rear side wall of the connecting plate 18. The slot 19 and the vertical plate 14 are matched with each other. A number of fixing bolts 20 are evenly distributed and threadedly connected to the side wall of the connecting plate 18. A movable shell 21 is movably connected to the front side wall of the connecting plate 18. A number of springs 22 are evenly distributed and fixedly connected to the inner side wall of the movable shell 21. The other end of the spring 22 is fixedly connected to the front side wall of the connecting plate 18. A sealing gasket 23 is fixedly connected to the front side wall of the movable shell 21. The static pressure chamber is divided into two static pressure chambers by the vertical partition 5, so that the airflows on both sides do not interfere with each other, and secondary turbulence of the airflow after being rectified by the front air duct is avoided.

[0042] An air conditioner 6 is fixedly connected to the top surface of the energy storage system case 1, and a mounting plate 7 is installed on the lower side of the air conditioner 6. The mounting plate 7 is fixedly connected to the energy storage system case 1, and an air supply port 8 and an air return port 9 are arranged on the mounting plate 7. The mounting plate 7 is located at the lower side of the air supply port 8 and is fixedly connected to an air supply duct shell 10, and a baffle 11 is fixedly connected to the front side of the air supply duct shell 10. Four guide vanes 12 are fixedly connected to the inner cavity of the air supply duct shell 10, and the two guide vanes 12 on the left are bent toward the left, and the two guide vanes 12 on the right are bent toward the right. A partition 13 is fixedly connected in the middle of the four guide vanes 12, and the partition 13 is fixedly connected to the mounting frame 4. The partition 13 and the two guide vanes 12 on the right are located at the lower side of the air supply port 8, and the airflow of the air supply port 8 of the air conditioner 6 can be rectified through the guide vanes 12, so that it flows into the rear pressure chamber more evenly and smoothly;

[0043] Among them, a fixing ring 17 is fixedly connected to the top surface of the air conditioner 6, and two fixing rings 17 are symmetrically arranged on the left and right, which is convenient for the installation and disassembly of the air conditioner 6 and the movement operation of the entire energy storage system.

[0044] refer to Figure 7 , a thermal management method for an air-cooled energy storage system, further comprising the following steps:

[0045] S1: The energy storage battery module of the energy storage system is fixedly mounted on the mounting frame 4, and a temperature monitoring device is installed in the energy storage system box 1 to realize the real-time monitoring function of the battery cell temperature of the battery module. During operation, the operation state of the energy storage system is divided into a system operation mode and a static / standby mode, and preset parameters are set so that different parameter controls are adopted in the two modes;

[0046] S2: When the energy storage system is in system operation mode, when the maximum temperature of the battery cells in all battery modules is greater than or equal to the preset value of 27 or the difference between the maximum temperature and the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset temperature difference value 2, the battery module fan is turned on to cool the battery cells, otherwise the battery module fan is turned off;

[0047] S3: When the minimum temperature of the battery cells in all battery modules is less than or equal to the preset value 21 of the battery cells, the heating mode of the air conditioner 6 is started, and when the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset value 22 of the battery cells, the heating mode of the air conditioner 6 is turned off;

[0048] S4: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 21, and when the maximum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 23, the cooling mode of the air conditioner 6 is started, and when the maximum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 24, the cooling mode of the air conditioner 6 is turned off;

[0049] S5: When the energy storage system is in the system standby mode, when the maximum temperature of the battery cells in all battery modules is greater than or equal to the preset value of 17 or the difference between the maximum temperature and the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset temperature difference value 1, the battery module fan is turned on to cool the battery cells, otherwise the battery module fan is turned off;

[0050] S6: When the minimum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 11, the air conditioner 6 heating mode is started, and when the minimum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 12, the air conditioner 6 heating mode is turned off;

[0051] S7: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 11, and the maximum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 13, the cooling mode of the air conditioner 6 is started, and the cooling mode of the air conditioner 6 is turned off when the minimum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 14;

[0052] S8: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 11, and the maximum temperature of the battery cells in all battery modules is less than the battery cell preset value 13, the dehumidification condition is met, and the dehumidification function of air conditioner 6 is started until the collected data meets the humidity preset value, and the dehumidification function of air conditioner 6 is turned off.

[0053] For the battery module fan control, when setting the preset parameters, it is necessary to ensure that: the temperature difference preset value 1 is greater than the temperature difference preset value 2, and the battery cell preset value 17 is greater than the battery cell preset value 27; for the heating control, when setting the preset parameters, it is necessary to ensure that: the battery cell preset value 11 is greater than the battery cell preset value 12, and the battery cell preset value 21 is greater than the battery cell preset value 22; for the cooling control, when setting the preset parameters, it is necessary to ensure that: the battery cell preset value 23 is greater than the battery cell preset value 24, greater than the battery cell preset value 13, greater than the battery cell preset value 14, greater than the battery cell preset value 27, and greater than the battery cell preset value 17.

[0054] By adopting the above thermal management temperature control method and setting reasonable preset value parameters, the system can operate reasonably; in static mode, it can reduce standby power consumption, or avoid unnecessary fan single operation mode, or waste cooling power consumption, improve efficiency, and achieve energy saving.

[0055] Compared with the prior art, the present invention is provided with a guide plate and a vertical partition. By adding a guide plate in the air supply duct shell of the air conditioner, the airflow is rectified in the air supply duct shell of the air conditioner, so that the outflowing airflow is smooth and evenly distributed, and a vertical partition is added in the static pressure cavity, so that the static pressure cavity of the original energy storage system box inner cavity is divided into two left and right ones, and the airflows in the static pressure cavities on both sides do not interfere with each other, thereby avoiding secondary turbulence of the airflow after rectification by the front air duct, making the airflow drawn into the battery modules on the left and right sides more uniform, and the airflow optimization use effect is good; the present invention adopts a new thermal management temperature control method and sets reasonable preset value parameters, so as to make the system operate reasonably, and in the static mode, reduce the standby power consumption, or avoid unnecessary single operation mode of the fan, or waste refrigeration power consumption, improve efficiency, and achieve the purpose of energy saving.

[0056] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An air-cooled energy storage system, comprising an energy storage system box (1), characterized in that: Two door panels (2) are symmetrically and movably connected on the front side wall of the energy storage system box (1); a bottom shell (3) is fixedly connected to the lower side of the energy storage system box (1); a mounting frame (4) is provided in the inner cavity of the energy storage system box (1); a vertical partition (5) is fixedly connected to the center of the front side wall of the mounting frame (4); an air conditioner (6) is fixedly connected to the top surface of the energy storage system box (1); a mounting plate (7) is installed on the lower side of the air conditioner (6); the mounting plate (7) is fixedly connected to the energy storage system box (1); and an air supply port (8) and an air outlet (9) are provided on the mounting plate (7). 9), the mounting plate (7) is located at the lower side of the air supply port (8) and is fixedly connected to an air supply duct shell (10), the front side of the air supply duct shell (10) is fixedly connected to a baffle plate (11), the inner cavity of the air supply duct shell (10) is fixedly connected to four guide plates (12), the two guide plates (12) on the left are bent toward the left, and the two guide plates (12) on the right are bent toward the right, a partition plate (13) is fixedly connected in the middle of the four guide plates (12), the partition plate (13) is fixedly connected to the mounting frame (4), and the partition plate (13) and the two guide plates on the right are fixedly connected to each other. (12) is arranged at the lower side of the air supply port (8), the mounting frame (4) comprises a plurality of vertical plates (14), a plurality of side plates (15) are evenly distributed and fixedly connected from top to bottom between two adjacent vertical plates (14) at the front and rear sides, a plurality of horizontal plates (16) are evenly distributed and fixedly connected from top to bottom between a plurality of vertical plates (14) at the same side at the front and rear sides, the horizontal plates (16) are fixedly connected to the side plates (15), the vertical partition plate (5) is fixedly connected to the vertical plate (14) at the center of the front side, the vertical partition plate (5) comprises a connecting plate (18), and the cross section of the connecting plate (18) is T-shaped. The connecting plate (18) is provided with a slot (19) on the rear side wall, the slot (19) and the vertical plate (14) are matched with each other, a plurality of fixing bolts (20) are evenly distributed and threadedly connected on the side wall of the connecting plate (18), a movable shell (21) is movably connected to the front side wall of the connecting plate (18), a plurality of springs (22) are evenly distributed and fixedly connected to the inner side wall of the movable shell (21), the other end of the spring (22) is fixedly connected to the front side wall of the connecting plate (18), and a sealing gasket (23) is fixedly connected to the front side wall of the movable shell (21).

2. The air-cooled energy storage system according to claim 1, characterized in that: A fixing ring (17) is fixedly connected to the top surface of the air conditioner (6), and two fixing rings (17) are symmetrically arranged on the left and right.

3. A thermal management method for an air-cooled energy storage system according to any one of claims 1-2, characterized in that: The following steps are involved: S1: The energy storage battery module of the energy storage system is fixedly mounted on a mounting frame (4), and a temperature monitoring device is installed in the energy storage system box (1) to realize a real-time monitoring function of the battery cell temperature of the battery module. During operation, the operation state of the energy storage system is divided into a system operation mode and a static / standby mode, and preset parameters are set so that different parameter controls are adopted in the two modes; S2: When the energy storage system is in the system operation mode, when the maximum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 27 or the difference between the maximum temperature and the minimum temperature of the battery cells in all battery modules is greater than or equal to the temperature difference preset value 2, the battery module fan is turned on to cool the battery cells, otherwise the battery module fan is turned off. For the battery module fan control situation, when setting the preset parameters, it is necessary to ensure that: the temperature difference preset value 1 is greater than the temperature difference preset value 2, and the battery cell preset value 17 is greater than the battery cell preset value 27; S3: When the minimum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 21, the air conditioner (6) heating mode is started, and when the minimum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 22, the air conditioner (6) heating mode is turned off. For the heating control situation, when setting the preset parameters, it is necessary to ensure that: the battery cell preset value 11 is greater than the battery cell preset value 12, and the battery cell preset value 21 is greater than the battery cell preset value 22; S4: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 21, and when the maximum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 23, the air conditioner (6) cooling mode is started, and the maximum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 24, and the air conditioner (6) cooling mode is turned off. For the cooling control situation, when setting the preset parameters, it is necessary to ensure that: the battery cell preset value 23 is greater than the battery cell preset value 24, greater than the battery cell preset value 13, greater than the battery cell preset value 14, greater than the battery cell preset value 27, and greater than the battery cell preset value 17; S5: When the energy storage system is in the system standby mode, when the maximum temperature of the battery cells in all battery modules is greater than or equal to the preset value of 17 or the difference between the maximum temperature and the minimum temperature of the battery cells in all battery modules is greater than or equal to the preset temperature difference value 1, the battery module fan is turned on to cool the battery cells, otherwise the battery module fan is turned off; S6: When the minimum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 11, the air conditioner (6) heating mode is started, and when the minimum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 12, the air conditioner (6) heating mode is turned off; S7: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 11, and the maximum temperature of the battery cells in all battery modules is greater than or equal to the battery cell preset value 13, the air conditioner (6) cooling mode is started, and when the minimum temperature of the battery cells in all battery modules is less than or equal to the battery cell preset value 14, the air conditioner (6) cooling mode is turned off; S8: When the minimum temperature of the battery cells in all battery modules is greater than the battery cell preset value 11, and the maximum temperature of the battery cells in all battery modules is less than the battery cell preset value 13, the dehumidification condition is met, and the dehumidification function of the air conditioner (6) is started until the collected data meets the humidity preset value, and the dehumidification function of the air conditioner (6) is turned off.

Images