Thermal management system control method of energy storage cabinet and energy storage cabinet

Abstract

The invention relates to a heat management system control method of an energy storage cabinet and the energy storage cabinet, and belongs to the technical field of energy storage. A heat management system comprises a heat management device, a filter screen and a driving assembly, the heat management device comprises an air inlet, and the driving assembly is used for driving the filter screen to move; the control method of the heat management system of the energy storage cabinet at least comprises the following steps that when the heat management device is in an open state and the relative small and medium particle concentration P in the current external environment is larger than the relative small and medium particle concentration threshold Pth + return difference value a, a driving assembly is started, so that a filter screen moves to a shielding state relative to an air inlet. When the relative small and medium particle concentration P in the current external environment is smaller than the relative small and medium particle concentration threshold Pth-return difference value a, the filter screen moves to the falling state relative to the air inlet, the risk that the filter screen is still in the shielding state and consequently wind resistance is increased is avoided, the air flow is increased, the risk that the heat management device is derated is reduced, and the service life of the heat management device is prolonged. The heat exchange efficiency of the heat management device is improved, and meanwhile the filtering effect and wind resistance are effectively balanced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, in particular to a thermal management system control method of an energy storage cabinet and an energy storage cabinet. Background Art

[0002] Energy storage cabinets are usually equipped with a thermal management system to maintain the optimal operating temperature inside the energy storage cabinet and improve the working performance of the battery cabinet. The thermal management system is usually equipped with an air conditioner, which generally includes an indoor unit and an outdoor unit. The function of the indoor unit is to cool and circulate the air inside the energy storage cabinet, and the function of the outdoor unit is to cool the refrigerant in the air conditioner condenser through external air. The outdoor unit includes an air inlet and an air outlet, which are used for air in and out respectively. When the energy storage cabinet is in a harsh environment, a lot of foreign matter such as sand and dust will enter the energy storage cabinet through the air inlet. Therefore, at present, a filter is added at the air inlet to prevent foreign matter from entering the energy storage cabinet. However, the installation of a filter will increase the wind resistance, which may easily lead to the risk of derating of the thermal management system, and at the same time cause an imbalance between the filtering effect and the wind resistance. Summary of the invention

[0003] The present application provides a thermal management system control method of an energy storage cabinet and an energy storage cabinet, which are used to solve the problem that the filter will increase the wind resistance, which may easily lead to the derating of the thermal management system, and at the same time cause the problem of imbalance between the filtering effect and the wind resistance.

[0004] In a first aspect, the present application provides a method for controlling a thermal management system of an energy storage cabinet, wherein the thermal management system comprises a thermal management device, a filter and a drive assembly, wherein the thermal management device comprises an air inlet, and the drive assembly is used to drive the filter to move. The method for controlling the thermal management system of the energy storage cabinet comprises at least the following steps: Determine whether the thermal management device is in an on state; When the thermal management device is in the on state, the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P are obtained. th and the hysteresis value a, to determine whether the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th + hysteresis value a; When the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th + hysteresis value a, the driving assembly is turned on to move the filter screen relative to the air inlet to a shielding state; When the relative small and medium particle concentration P of the current external environment is less than or equal to the relative small and medium particle concentration threshold P th + hysteresis value a, continue to judge whether the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th - Hysteresis value a; When the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th -When the hysteresis value is a, the driving assembly is closed to allow the filter to move relative to the air inlet to a falling state.

[0005] Specifically, the thermal management device can be an air conditioner. When it is determined that the thermal management device is turned on, the thermal management system control method of the energy storage cabinet determines the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P of the area. th The relationship between the filter and the hysteresis value a is used to control the state of the filter in real time. When it is judged that the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th + hysteresis value a, that is, at this time the concentration of small and medium-sized particles in the outside air is high, the filter is controlled to move to the blocking state, so that the filter can be close to and block the air inlet, the filter can filter out foreign matter such as dust in the air, reduce the risk of a large amount of dust and other foreign matter flowing into the air inlet, and then reduce the risk of dust and other foreign matter blocking air circulation, so that the thermal management device has a good filtering effect, so that the thermal management system can maintain a good heat exchange efficiency, improve the reliability of the thermal management system's stable operation, and at the same time reduce the risk of foreign matter blocking the air inlet, which is beneficial to increasing the service life of the thermal management device.

[0006] When it is judged that the relative small and medium particle concentration P of the current external environment is less than or equal to the relative small and medium particle concentration threshold P th + hysteresis value a, continue to judge whether the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th - Hysteresis value a, when the current external environment relative small and medium particle concentration P is less than the relative small and medium particle concentration threshold P th -When the hysteresis value is a, that is, the concentration of small and medium-sized particles in the outside air is low at this time, the filter is controlled to move to the falling state so that the air can flow into the air inlet without passing through the filter, avoiding the risk of increased wind resistance caused by the filter still being in a blocked state, increasing the air flow, reducing the risk of derating of the thermal management device, and helping to improve the heat exchange efficiency of the air conditioner.

[0007] Therefore, the thermal management system control method of the energy storage cabinet determines the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P of the area. thThe relationship between the filter status and the hysteresis value a is used to control the filter status in real time, so that the filter status can be adjusted in real time according to the changes in the external environment, thereby effectively balancing the filtering effect and wind resistance, so that the thermal management device has good working performance, and at the same time, the thermal management device maintains good heat exchange efficiency, while improving the thermal management device to maintain good working stability and service life. In addition, since the thermal management system control method of the energy storage cabinet is to judge the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P of the area th The relationship between the hysteresis value a and the control method can be applied to different regions and different external environments, that is, the current external environment relative small and medium particle concentration P, relative small and medium particle concentration threshold P th The hysteresis value a will be adjusted as the environment in different regions changes, which improves the applicability and versatility of the thermal management system control method of the energy storage cabinet. The method of directly judging whether the air quality in the air is poor by judging the relative concentration of small and medium particles is more direct and accurate than judging wind speed, wind direction, etc., which is beneficial to improving the accuracy of adjusting the filter state according to changes in the external environment, and is beneficial to reducing the heat exchange energy consumption of the thermal management device while enabling the thermal management device to maintain the optimal heat exchange efficiency.

[0008] In this solution, in the step of obtaining the relative small and medium particle concentration P of the current external environment, the thermal management system control method of the energy storage cabinet specifically includes: Detect the small particle concentration P1 in the current external environment and the maximum value P of the small and medium particle concentration in the environment where the energy storage cabinet is located. max , and according to the formula: P=P1 / P max , calculate the relative concentration of small and medium particles P in the current external environment.

[0009] In this scheme, after obtaining the relative small and medium particle concentration threshold P th In the step, the thermal management system control method of the energy storage cabinet specifically includes: According to the set small and medium particle concentration threshold P2, and according to the formula P th= P2 / P max , calculate the relative small and medium particle concentration threshold P th .

[0010] In this solution, in the step of obtaining the hysteresis value a, the thermal management system control method of the energy storage cabinet specifically includes: Detect the minimum value P of the concentration of small and medium particles in the environment where the energy storage cabinet is located min According to the formula d = (P max- P min ) / P max ; According to the formula: , calculate the hysteresis value a; Among them, m1 is the adjustment coefficient.

[0011] In this scheme, the following condition is satisfied: 0<a≤0.2×P.

[0012] In this solution, the thermal management system control method of the energy storage cabinet also includes: When the current external environment relative to the concentration of small and medium particles P satisfies: P th -a≤P≤P th +a, the filter is controlled to maintain the original state.

[0013] In this scheme, when the current external environment relative small and medium particle concentration P is less than the relative small and medium particle concentration threshold P th -When the hysteresis value is a, and before the step of shutting down the drive assembly, the thermal management system control method of the energy storage cabinet specifically includes: The thermal management device is controlled to shut down for t seconds.

[0014] A second aspect of the present application provides an energy storage cabinet, the energy storage cabinet comprising the above-mentioned thermal management system control method of the energy storage cabinet; The energy storage cabinet includes a thermal management device, a filter and a drive assembly. The thermal management device includes an external unit and an air inlet. The drive assembly is used to movably connect the filter to the surface of the external unit.

[0015] In this solution, the driving assembly includes a first connecting member and a second connecting member, and a magnetic outer frame is also provided on the outer periphery of the filter screen. Along the height direction of the external unit, one end of the magnetic outer frame is connected to the external unit via the first connecting member, and the other end of the magnetic outer frame is connected to the external unit via the second connecting member. The magnetic outer frame can move relative to the second connecting member to drive the filter screen to rotate around the first connecting member relative to the external unit.

[0016] In this solution, the driving component includes an electromagnet, and a mounting groove is provided at the top of the external unit, and the mounting groove is used to install the electromagnet. When the electromagnet is energized, the magnetic outer frame drives the filter to move toward the external unit to switch to a shielding state. When the electromagnet is not energized, the filter moves away from the external unit to switch to a falling state.

[0017] In this solution, in the fallen back state, there is a gap S between the end of the magnetic outer frame connected to the second connecting member and the external unit, satisfying: 4cm≤S≤8cm.

[0018] In this solution, a gasket is further provided on the surface of the filter screen facing the external unit. In the shielding state, the gasket fits against the surface of the external unit so that an angle θ is formed between the filter screen and the external unit, satisfying 0.5°≤θ≤1°.

[0019] In this solution, the thickness of the gasket gradually increases along the direction from the first connecting member to the second connecting member.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flow chart of a thermal management system control method for an energy storage cabinet provided in the present application in a specific embodiment; Figure 2 This is a schematic structural diagram of a thermal management device provided in the present application in a specific embodiment, wherein the filter screen is in a falling state; Figure 3 This is a schematic structural diagram of a thermal management device provided in the present application in a specific embodiment, wherein the filter screen is in a shielding state; Figure 4 for Figure 2 A schematic diagram of a local structure from another perspective; Figure 5 for Figure 3 A schematic diagram of a local structure from another perspective; Figure 6 This is a schematic structural diagram of a gasket provided in this application in a specific embodiment; Figure 7 This is a schematic structural diagram of the gasket provided in this application in another specific embodiment.

[0022] Description of reference numerals: 1- Thermal management device; 11- Air inlet; 12-Outdoor unit; 121-installation slot; 2-Filter; 3-Magnetic frame; 4-Drive assembly; 41- first connecting member; 42- second connecting member; 43-electromagnet; 5- Gasket; 51-through hole; 52-avoidance hole; 53-Avoid the gap.

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0024] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] In a specific embodiment, the present application is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0026] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0027] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0028] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0030] This application provides a thermal management system control method for an energy storage cabinet, such as Figure 1 As shown, the thermal management system includes a thermal management device 1, a filter 2 and a drive component 4, the thermal management device 1 includes an air inlet 11, and the drive component 4 is used to drive the filter 2 to move. The thermal management system control method of the energy storage cabinet includes at least the following steps: Determining whether the thermal management device 1 is in an on state; When the thermal management device 1 is in the on state, the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P are obtained. th and the hysteresis value a, to determine whether the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th + hysteresis value a; When the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th When the hysteresis value is a, the drive assembly 4 is turned on to move the filter screen 2 relative to the air inlet 11 to a position as shown in FIG. Figure 3 The occlusion state shown; When the relative small and medium particle concentration P of the current external environment is less than or equal to the relative small and medium particle concentration threshold P th + hysteresis value a, continue to judge whether the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th - Hysteresis value a; When the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th - When the hysteresis value is a, the drive assembly 4 is closed to move the filter screen 2 relative to the air inlet 11 to a position as Figure 2 The fallback state shown.

[0031] The size of the small and medium particles used to detect the concentration of small and medium particles in the air should be greater than 10 um, and the filter 2 can be made of non-woven fabric, filter cotton, or other materials that can filter tiny particles in the air.

[0032] Specifically, the thermal management device 1 may be an air conditioner. When it is determined that the thermal management device 1 is turned on, the thermal management system control method of the energy storage cabinet determines the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P of the region. th The relationship between the filter screen 2 and the hysteresis value a is used to control the state of the filter screen 2 in real time. When it is determined that the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th + hysteresis value a, that is, at this time the concentration of small and medium-sized particles in the outside air is relatively high, the filter 2 is controlled to move to the blocking state, so that the filter 2 can be close to and block the air inlet 11, and the filter 2 can filter foreign matter such as dust in the air, reduce the risk of a large amount of dust and other foreign matter flowing into the air inlet 11, and thus reduce the risk of dust and other foreign matter blocking air circulation, so that the thermal management device 1 has a good filtering effect, so that the thermal management system can maintain a good heat exchange efficiency, improve the reliability of the stable operation of the thermal management system, and at the same time reduce the risk of foreign matter blocking the air inlet 11, which is beneficial to increasing the service life of the thermal management device 1.

[0033] When it is judged that the relative small and medium particle concentration P of the current external environment is less than or equal to the relative small and medium particle concentration threshold P th + hysteresis value a, continue to judge whether the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th - Hysteresis value a, when the current external environment relative small and medium particle concentration P is less than the relative small and medium particle concentration threshold P th-When the hysteresis value is a, that is, the concentration of small and medium-sized particles in the outside air is low at this time, the filter 2 is controlled to move to the falling state, so that the air can flow into the air inlet 11 without passing through the filter 2, thereby avoiding the risk of the filter 2 being still in a blocked state and causing the wind resistance to increase, increasing the air flow rate, reducing the risk of derating of the thermal management device 1, that is, the risk of derating of the compressor in the air conditioner, avoiding the risk of reduced cooling capacity of the thermal management device 1, and helping to improve the heat exchange efficiency of the air conditioner.

[0034] Therefore, the thermal management system control method of the energy storage cabinet determines the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P of the area. th The relationship between the filter screen 2 and the hysteresis value a is used to control the state of the filter screen 2 in real time, so that the filter screen 2 can adjust its state in real time according to the change of the relative small and medium particle concentration in the external environment, thereby effectively balancing the filtering effect and wind resistance, so that the thermal management device 1 has good working performance. In addition, since the thermal management system control method of the energy storage cabinet is to judge the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P of the area th The relationship between the hysteresis value a and the control method can be applied to different regions and different external environments, that is, the current external environment relative small and medium particle concentration P, relative small and medium particle concentration threshold P th The hysteresis value a will be adjusted as the environment in different regions changes, thereby improving the applicability and versatility of the thermal management system control method of the energy storage cabinet. The method of directly judging whether the air quality in the air is poor by judging the relative concentration of small and medium particles is more direct and accurate than judging wind speed, wind direction, etc., which is beneficial to improving the accuracy of adjusting the state of the filter 2 according to changes in the external environment, and is beneficial to reducing the heat exchange energy consumption of the thermal management device 1 while enabling the thermal management device 1 to maintain the optimal heat exchange efficiency.

[0035] In addition, compare the current external environment relative small and medium particle concentration P with the relative small and medium particle concentration threshold P th - Hysteresis value a, or, compare the current external environment relative small and medium particle concentration P with the relative small and medium particle concentration threshold P th + hysteresis value a, when the current external environment relative small and medium particle concentration P is approximately equal to the relative small and medium particle concentration threshold P th By adding or subtracting the return difference a, the risk of the filter 2 repeatedly switching to the blocking state or the falling state due to the fluctuation of the current external environment relative to the small and medium particle concentration P can be reduced, thereby reducing the risk of increasing the energy consumption of the thermal management system of the energy storage cabinet.

[0036] Table 1 Different states of the filter of the same thermal management device Fan power (W) <![CDATA[Air intake volume of the air inlet (m 3 / h)]]> Cooling capacity (KW) Occlusion status 187 512 1.47 Fallback status 187 698 2 The thermal management device 1 is selected as an air conditioner with an applicable voltage of 230V and an operating frequency of 50Hz. The filter 2 can be selected as a filter with a specification of G2, that is, the G2 filter can capture 50%-70% of air particles larger than 10μm. From Table 1, it can be seen that when the external environmental conditions are kept the same and the fan power of the thermal management device 1 is kept consistent, after the filter 2 on the thermal management device 1 is controlled to be in the state, the fan power of the thermal management device 1 is 187w, and the air intake of the thermal management device 1 is detected to be 512m 3 / h, the cooling capacity of the thermal management device 1 is 1.47KW; after controlling the filter 2 on the thermal management device 1 to be in the shielding state, the fan power of the thermal management device 1 is 187w, and the air intake volume of the thermal management device 1 is detected to be 698m 3 / h, the cooling capacity of the thermal management device 1 is 2KW. Therefore, it can be seen that under the same conditions of fan power and external environment, the air intake volume of the filter 2 of the thermal management device 1 in the falling state is larger than the air intake volume of the filter 2 in the shielding state, which means that the wind resistance of the filter 2 of the thermal management device 1 in the falling state is smaller than the wind resistance of the filter 2 in the shielding state. It can be seen that the cooling capacity of the filter 2 in the falling state is larger than the cooling capacity of the filter 2 in the shielding state, that is, the thermal management device 1 has a good cooling effect when the filter 2 is in the falling state, and can effectively balance the filtering effect and wind resistance, so that the thermal management system of the energy storage cabinet is maintained in the optimal working state.

[0037] In a possible implementation, a structure such as a shutter or a grille is provided on the air inlet 11. When the filter 2 is in the retracted state, the risk of foreign objects such as flying insects entering the external unit 12 through the air inlet 11 is avoided, thereby improving the reliability of the energy storage cabinet.

[0038] In a possible implementation, Figure 1 As shown, in the step of obtaining the relative small and medium particle concentration P of the current external environment, the thermal management system control method of the energy storage cabinet specifically includes: Detect the small particle concentration P1 in the current external environment and the maximum value P of the small and medium particle concentration in the environment where the energy storage cabinet is located. max , and according to the formula: P=P1 / P max , calculate the relative concentration of small and medium particles P in the current external environment. Among them, the maximum concentration of small and medium particles in the environment where the energy storage cabinet is located is P max It can be the maximum concentration of small and medium particles that appear in the environment of the area within 30 days.

[0039] Specifically, the thermal management system of the energy storage cabinet is provided with a dust sensor, which can be arranged on the outer surface of the thermal management device 1. The dust sensor is used to detect the concentration P1 of small and medium-sized dust particles in the current external environment and the maximum value P1 of the concentration of small and medium-sized dust particles in the environment where the energy storage cabinet is located.max .

[0040] By formula: P=P1 / P max , calculate the relative concentration of small and medium particles P in the current external environment, that is, by adopting the relative value calculation method, it can more intuitively reflect whether the concentration of small and medium particles P1 in the current external environment is higher or lower than the concentration of small and medium particles in the local environment, thereby improving the adaptability and sensitivity of the thermal management system control method of the energy storage cabinet.

[0041] In a possible implementation, Figure 1 As shown, the relative small and medium particle concentration threshold P is obtained. th In the steps, the thermal management system control method of the energy storage cabinet specifically includes: According to the set small and medium particle concentration threshold P2, and according to the formula P th =P2 / P max , calculate the relative small and medium particle concentration threshold P th .

[0042] Specifically, the small and medium particle concentration threshold P2 is an input threshold. The value of the small and medium particle concentration threshold P2 can be determined based on the user needs of the thermal management system of the energy storage cabinet, the local environment, local laws and regulations, and other factors. The recommended value range of the small and medium particle concentration threshold P2 is: 300~500ug / m 3 .

[0043] By formula: P th =P2 / P max , calculate the relative small and medium particle concentration threshold P th , that is, by using the relative value calculation method, the relative small and medium particle concentration threshold P is calculated. th The value of can be adjusted according to the distribution of the small and medium particle concentration threshold in the air that should be met in the area. Compared with the fixed threshold, this application calculates the relative small and medium particle concentration threshold P th It can greatly improve the adaptability of the thermal management system control method of the energy storage cabinet under different environmental requirements.

[0044] In summary, due to different dust prevention requirements in different regions, the relative value calculation method is adopted, using the current external environment relative small and medium particle concentration P and the relative small and medium particle concentration threshold P th By comparison, when the thermal management system of the energy storage cabinet is in different regions, it can adjust and judge automatically according to the distribution of small and medium-sized particle concentrations in the air in the region, so that the thermal management system control method of the energy storage cabinet has a certain applicability, and then the thermal management system control method of the energy storage cabinet can adapt and adjust the state of the filter 2 according to the environment of different regions, so that the thermal management system control method of the energy storage cabinet can meet the dust prevention requirements under different environmental conditions.

[0045] In a possible implementation, Figure 1 As shown, in the step of obtaining the hysteresis value a, the thermal management system control method of the energy storage cabinet specifically includes: Detect the minimum value P of the concentration of small and medium particles in the environment where the energy storage cabinet is located min According to the formula d = (P max -P min ) / P max Among them, the maximum value of the concentration of small and medium particles in the environment where the energy storage cabinet is located is P min It can be the minimum concentration of small and medium particles that appear in the environment of the area within 30 days.

[0046] According to the formula: , calculate the hysteresis value a; Among them, m1 is the adjustment coefficient, and m1 is used to adjust the size of the hysteresis value a, that is, to adjust the sensitivity of the thermal management system of the energy storage cabinet. It should be noted that the larger the m1, the higher the robustness of the thermal management system of the energy storage cabinet. At the same time, the value of m1 should not make the hysteresis value a>0.2, so that the size of the hysteresis value is moderate, reduce the problem of excessive hysteresis value affecting the accuracy of the thermal management system control method of the energy storage cabinet, and improve the accuracy of adjusting the filter 2. Specifically, the default value of m1 is 1, and the value of m1 mainly depends on the user's usage needs and the volatility of the small particle concentration P1 in the current external environment. If the thermal management device 1 is required to respond promptly and sensitively according to the changes in the small and medium particle concentration P in the current external environment, the value of m1 should be less than 1. If the thermal management device 1 is required to have higher stability to avoid frequent switching of the filter 2 state, the value of m1 should be greater than 1. For example, within one hour, it is detected that the small particle concentration P1 in the current external environment reaches the maximum value P of the small and medium particle concentration in the environment where the energy storage cabinet is located. max The number of times does not exceed five times, and the current small particle concentration P1 in the external environment reaches the minimum value P of the small and medium particle concentration in the environment where the energy storage cabinet is located. minThe number of times does not exceed 5 times, and the user does not have strict dust prevention requirements, then the value of m1 is 1. When the concentration of small and medium particles in the environment where the energy storage cabinet is located changes frequently and greatly, such as the detection of the relative small and medium particle concentration P of the current external environment to be 50% within one hour, and the value of the current external environment relative small and medium particle concentration P frequently fluctuates within a range of about 10%, then the value of m1 can be 1.5, which is conducive to avoiding the thermal management device 1 controlling the filter 2 to switch states frequently. When the concentration of small and medium particles in the environment where the energy storage cabinet is located changes frequently and slightly, such as the detection of the relative small and medium particle concentration P of the current external environment to be 50% within one hour, and the maximum frequent fluctuation range of the value of the current external environment relative small and medium particle concentration P does not exceed 5%, and the change is slow, and the user has strict requirements on the dust prevention effect of the system, then m1 can be set to 0.6 to ensure that the thermal management system of the energy storage cabinet can respond quickly.

[0047] Among them, d can be the maximum difference in the relative small and medium particle concentration in the environment where the thermal management system of the energy storage cabinet is located within 30 days. Calculating d is helpful to improve the adaptability of the return difference value a in the current environment and improve the accuracy and timeliness of adjusting the filter 2.

[0048] From the formula: It can be seen that the size of the hysteresis value a is related to the current external environment relative small and medium particle concentration P and the relative small and medium particle concentration threshold P th are all related, which is beneficial to reduce the influence of the hysteresis value a on the judgment of the concentration of small particles in the air. At the same time, it can reduce the relative concentration of small and medium particles in the current external environment P to be approximately equal to the relative small and medium particle concentration threshold P th The risk of frequent switching of filter 2 status occurs. Specifically, the first term in the formula: Represents the relative small and medium particle concentration threshold P th The impact on the hysteresis value a, so that the hysteresis value can be adjusted according to different regions or different environments with the relative small and medium particle concentration threshold P th The hysteresis value a can be adjusted according to the change of the small and medium particle concentration threshold value P, so that the hysteresis value a can be applied to different regions and different environments. : Relative small and medium particle concentration threshold P th The impact on the hysteresis value a is by default the relative small and medium particle concentration threshold P th If the relative small and medium particle concentration threshold value P is exceeded, th If the concentration of small and medium particles is less than 10%, the response capability of the thermal management system of the energy storage cabinet will decrease. th 10% will reduce the stability of the thermal management system of the energy storage cabinet, causing the filter 2 to frequently switch states. thThe impact on the hysteresis value a is by default the relative small and medium particle concentration threshold P th 10% of the energy storage cabinet’s thermal management system can have good responsiveness and stability.

[0049] The second term in the formula: Indicates the influence of the maximum difference d of the relative small and medium particle concentration on the hysteresis value a. When the maximum or minimum small and medium particle concentration in the external environment changes too much or too little, the system can adaptively adjust the hysteresis value a to avoid the filter 2 frequently changing its working state and the thermal management system of the energy storage cabinet responding too slowly to the change of the small and medium particle concentration in the external environment, thereby further improving the adaptability of the hysteresis value a. The values ​​of -0.05 and 0.1 are based on the following: when the maximum difference d of the relative small and medium particle concentration in the environment where the thermal management system of the energy storage cabinet is located is the maximum value 1, this item The value of is 5%, that is, the maximum difference d of the relative small and medium particle concentration in the environment where the thermal management system of the energy storage cabinet is located has a maximum influence on the hysteresis value a of 5% under the default conditions. This term adopts the form of an exponential function. The reason is that according to the values ​​of the coefficients in the formula, as d increases, the absolute value of the derivative of this term decreases, that is, as the value of d increases, the change of this term tends to be gentle, which can better meet the actual application conditions. This term can make the hysteresis value a change quickly when the value of d is small, thereby improving the response speed of the thermal management system of the energy storage cabinet; when the value of d is large, it remains relatively stable. In summary, this term The value of d will not be too small to obtain the appropriate value, nor will the output change drastically because the value of d is too large.

[0050] In some embodiments, when the maximum difference d of the relative small and medium particle concentration takes a maximum value of 1, the second term: The value of is 5%, which means that the maximum influence of the maximum difference d of the relative small and medium particle concentration will not exceed 5%, thereby avoiding the problem that the thermal management system of the energy storage cabinet responds too slowly to the change of the small and medium particle concentration in the outside world, and improving the response speed of the thermal management system of the energy storage cabinet so that the state of the filter 2 can be switched in time.

[0051] In a possible implementation, the following condition is satisfied: 0<a≤0.2×P, that is, the hysteresis value a should not exceed 20% of the current external environment's relative small and medium particle concentration P, thereby reducing the impact of an excessively large hysteresis value a on inaccurate calculation and judgment of the relative small and medium particle concentration, and improving the accuracy of controlling the switching state of the filter 2.

[0052] In a possible implementation, Figure 1 As shown, the thermal management system control method of the energy storage cabinet also includes: When the current external environment relative to the concentration of small and medium particles P satisfies: Pth -a≤P≤P th When +a, the filter 2 is controlled to maintain the original state.

[0053] In this embodiment, when the current external environment is relatively small and medium particle concentration P is P th -a~P th +a, that is, at this moment, the current external environment is relatively moderate in small and medium particle concentration P, and the filter 2 is still controlled to maintain the original state, that is, the filter 2 is in a shielding state or a falling state, to avoid the current external environment relative to the small and medium particle concentration P in P th -a~P th +a, the driving component 4 starts and stops frequently, which is beneficial to reducing the energy consumption of the thermal management system of the energy storage cabinet.

[0054] In a possible implementation, Figure 1 As shown, when the current external environment relative small and medium particle concentration P is less than the relative small and medium particle concentration threshold P th -When the hysteresis value is a, and before the step of shutting down the drive assembly 4, the thermal management system control method of the energy storage cabinet specifically includes: The thermal management device 1 is controlled to be shut down for t seconds.

[0055] In this example, the thermal management device 1 is controlled to shut down for t seconds to reduce the suction force of the thermal management device 1 near the air inlet 11, thereby avoiding the risk of the filter 2 being unable to smoothly switch to the fall-back state due to the suction force, and improving the reliability of the filter 2 switching to the fall-back state.

[0056] In a possible implementation, 1 second ≤ t ≤ 3 seconds is satisfied. In some embodiments, t may be 1 second, 1.1 seconds, 1.2 seconds, 1.3 seconds, 1.4 seconds, 1.5 seconds, 1.6 seconds, 1.7 seconds, 1.8 seconds, 1.9 seconds, 2 seconds, 2.1 seconds, 2.2 seconds, 2.3 seconds, 2.4 seconds, 2.5 seconds, 2.6 seconds, 2.7 seconds, 2.8 seconds, 2.9 seconds, or 3 seconds.

[0057] When 1 second ≤ t ≤ 3 seconds is satisfied, the shutdown time of the thermal management device 1 is controlled to be appropriate, which is beneficial to reducing the suction force at the air inlet 11 without affecting the cooling effect of the thermal management device 1 .

[0058] In a possible implementation, Figure 1 As shown, the thermal management system control method of the energy storage cabinet also includes: When the thermal management device 1 is in the closed state, the driving assembly 4 is turned off to put the filter 2 in the retracted state, which is beneficial to reducing the energy consumption of the thermal management system of the energy storage cabinet.

[0059] This application also provides energy storage cabinets, such as Figure 2-Figure 5As shown, the energy storage cabinet includes the thermal management system control method of the energy storage cabinet in any of the above embodiments; The energy storage cabinet includes a thermal management device 1, a filter 2 and a drive component 4. The thermal management device 1 includes an external unit 12 and an air inlet 11. The drive component 4 is used to flexibly connect the filter 2 to the surface of the external unit 12. Under the drive of the drive component 4, the filter 2 can be controlled to switch to a falling state and a shielding state.

[0060] Therefore, when the thermal management system control method of the energy storage cabinet is used for the energy storage cabinet, by judging the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P of the region, th The relationship between the filter screen 2 and the hysteresis value a is used to control the state of the filter screen 2 in real time, so that the filter screen 2 can be switched to the fall state or the shielding state in real time according to the changes in the external environment, so that the thermal management device 1 can maintain good heat exchange efficiency under different external environments, thereby improving the heat exchange capacity of the energy storage cabinet, and at the same time improving the energy storage cabinet to maintain good working stability and service life.

[0061] In a possible implementation, Figure 3 and Figure 4 As shown, the driving assembly 4 includes a first connecting member 41 and a second connecting member 42. A magnetic outer frame 3 is also provided on the periphery of the filter screen 2. Along the height direction of the external machine 12, one end of the magnetic outer frame 3 is connected to the external machine 12 via the first connecting member 41, and the other end of the magnetic outer frame 3 is connected to the external machine 12 via the second connecting member 42. The magnetic outer frame 3 can move relative to the second connecting member 42 to drive the filter screen 2 to rotate around the first connecting member 41 relative to the external machine 12.

[0062] Specifically, the magnetic outer frame 3 includes a first end and a second end, the first end is used to connect to the first connecting member 41, and the second end is used to connect to the second connecting member 42. When the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th +When the hysteresis value is a, the second end of the magnetic outer frame 3 is controlled to move toward the direction close to the surface of the external unit 12, and at the same time, the first end of the magnetic outer frame 3 is driven to rotate around the first connecting member 41, so that the magnetic outer frame 3 can fit the surface of the external unit 12, even if the filter screen 2 is switched to the blocking state, at this time, the filter screen 2 can fit at the air inlet 11.

[0063] When the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th -When the hysteresis value is a, the second end of the magnetic outer frame 3 is controlled to move in a direction away from the surface of the external unit 12, and at the same time, the first end of the magnetic outer frame 3 is driven to rotate around the first connecting member 41, so that the magnetic outer frame 3 and the surface of the external unit 12 form at least a certain angle, even if the filter screen 2 is switched to the falling state.

[0064] Therefore, the magnetic outer frame 3 is movably connected to the surface of the external unit 12 through the first connecting member 41 and the second connecting member 42, thereby improving the feasibility and reliability of driving the magnetic outer frame 3 to switch the filter screen 2 to the shielding state or the falling state. Figure 3 As shown, the first connecting member 41 can be any one of a hinge, a hinge or a rotating shaft, and the second connecting member 42 can be a guide rail. The structures of the first connecting member 41 and the second connecting member 42 are simple, easy to produce, and stable in movement.

[0065] In other embodiments, the second connecting member 42 may also be a connecting rod structure to control the magnetic outer frame 3 to drive the filter screen 2 to move relative to the external unit 12 .

[0066] In a possible implementation, Figure 2 As shown, the drive assembly 4 includes an electromagnet 43, and a mounting groove 121 is provided at the top of the external unit 12. The mounting groove 121 is used to install the electromagnet 43. When the electromagnet 43 is energized, the magnetic outer frame 3 drives the filter 2 to move toward the external unit 12 to switch to the shielding state. When the electromagnet 43 is not energized, the filter 2 moves away from the external unit 12 to switch to the falling state.

[0067] Specifically, if Figure 3 and Figure 4 As shown, when the first connecting member 41 is a hinge, the second connecting member 42 is a guide rail, and the second connecting member 42 is rotatably connected to the external unit 12, when the current external environment relative small and medium particle concentration P is greater than the relative small and medium particle concentration threshold P th + hysteresis value a, the battery management system (Battery Management System-BMS) in the energy storage cabinet controls the electromagnet 43 to be energized, and the magnetic outer frame 3, under the action of the magnetic force, makes the second end slide along the second connecting member 42 toward the surface of the external unit 12, and the first end rotates around the first connecting member 41, and at the same time, the second guide rail rotates relative to the surface of the external unit 12, so that the magnetic outer frame 3 drives the filter 2 to switch to the shielding state. When the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th -When the hysteresis value is a, the battery management system (Battery Management System-BMS) in the energy storage cabinet controls the electromagnet 43 to stop energizing, so that there is no magnetic attraction between the magnetic outer frame 3 and the electromagnet 43. Under the action of gravity, the second end of the magnetic outer frame 3 slides along the second connecting member 42 away from the surface of the external unit 12, and the first end rotates around the first connecting member 41. At the same time, the second guide rail rotates relative to the surface of the external unit 12, so that the magnetic outer frame 3 drives the filter 2 to switch to the falling state.

[0068] Therefore, an electromagnet 43 is arranged on the surface of the external unit 12 near the second end, and the state of the filter 2 is switched by controlling the electromagnet 43 to be energized or de-energized. Compared with the movement of the first connecting member 41 and the second connecting member 42 driven by electric control, the present application uses magnetic attraction to enable the filter 2 to respond quickly and switch to the corresponding state, thereby improving the accuracy of control. At the same time, in the process of switching the filter 2 to the fall-back state, no electricity is required, which is beneficial to reducing the energy consumption of the energy storage cabinet.

[0069] In a possible implementation, the external unit 12 may also be provided with a wind sensor. When it is determined that the wind in the external environment is strong and the relative small and medium particle concentration P in the current external environment is less than or equal to the relative small and medium particle concentration threshold P th + hysteresis value a, the battery management system (Battery Management System-BMS) in the energy storage cabinet controls the electromagnet 43 to increase the magnetic attraction, such as increasing the current, so that the magnetic frame 3 can be firmly attached to the surface of the external unit 12, thereby improving the stability of the filter 2 in the shielding state and reducing the risk of the filter 2 being blown away by the wind.

[0070] In a possible implementation, Figure 2 and Figure 4 As shown, in the falling state, there is a gap S between the end of the magnetic outer frame 3 connected to the second connecting member 42 and the external unit 12, satisfying: 4cm≤S≤8cm, that is, the magnetic outer frame 3 forms a certain angle with the surface of the external unit 12. In some embodiments, S can be 4cm, 4.5cm, 5cm, 5.5cm, 6cm, 6.5cm, 7cm, 7.5cm, 8cm, etc., and the corresponding angle between the magnetic outer frame 3 and the surface of the external unit 12 can be between 25°-35°, for example, the angle can be 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, etc.

[0071] Specifically, the second connecting member 42 can be provided with a limiting function to limit the distance between the second end and the surface of the external unit 12 to S. When 4cm≤S≤8cm is satisfied, the distance between the second end of the magnetic outer frame 3 and the surface of the external unit 12 is moderate, so that the risk of magnetic failure due to excessive distance is reduced, which is beneficial to improving the reliability of the filter 2 switching to the shielding state. At the same time, the angle between the magnetic outer frame 3 and the surface of the external unit 12 is moderate so that the air can flow smoothly into the air inlet 11 through the gap, which is beneficial to reducing wind resistance and reducing the space occupied by the filter 2.

[0072] In addition, if Figure 3 and Figure 4As shown, when the first connecting member 41 is a hinge, in the retracted state, the distance between the second end and the surface of the external machine 12 is S, and the opening and closing angle of the first connecting member 41 can be between 60° and 65°, avoiding the risk of a small opening and closing angle of the first connecting member 41, so that the first connecting member 41 can play a good supporting role on the magnetic outer frame 3, reducing the risk of excessive movement of the second end under the action of gravity, thereby reducing the risk of the second end slipping off the second connecting member 42, and improving the safety and reliability of the energy storage cabinet.

[0073] In a possible implementation, Figure 4 and Figure 5 As shown, the surface of the filter 2 facing the external unit 12 is also provided with a gasket 5. In the shielding state, the gasket 5 is in contact with the surface of the external unit 12, so that an angle θ is formed between the filter 2 and the external unit 12, satisfying 0.5°≤θ≤1°. In some embodiments, θ can be 0.5°, 0.6°, 0.7°, 0.8°, 0.9°, 1°, etc.

[0074] In this embodiment, by arranging a gasket 5 between the magnetic outer frame 3 and the surface of the external unit 12, in the shielding state, an angle θ is formed between the filter 2 and the external unit 12. When the electromagnet 43 is no longer energized, it is helpful to reduce the suction force of the air at the air inlet on the filter 2 and the magnetic outer frame 3, so that the filter 2 can be smoothly switched to the falling state, thereby improving the reliability and stability of the energy storage cabinet.

[0075] In a possible implementation, Figure 4 and Figure 5 As shown, the thickness of the gasket 5 gradually increases along the direction from the first connecting member 41 to the second connecting member 42, that is, the thickness of the gasket 5 near the first end is thinner, and the thickness of the gasket 5 near the second end is thicker, so that the gasket 5 can slightly raise the second end of the magnetic outer frame 3, even if the magnetic outer frame 3 and the filter screen 2 are not parallel to the external unit 12, the feasibility of the angle θ between the filter screen 2 and the external unit 12 is improved, and the difficulty of switching the filter to the fall-back state is reduced.

[0076] Specifically, if Figure 6 As shown, the gasket 5 can be fixed on the magnetic outer frame 3, and the outer contour of the gasket 5 can be the same as the contour of the magnetic outer frame 3, that is, a through hole 51 is provided in the middle of the gasket 5, so that the air can flow into the air inlet 11 through the through hole 51 after being filtered by the filter 2. At the same time, the gasket 5 can also be provided with an avoidance hole 52, and the size of the avoidance hole 52 is at least the same as the size of the installation groove 121. In the shielding state, the avoidance hole 52 corresponds to the installation groove 121, that is, the avoidance hole 52 is used to avoid the installation groove 121, thereby increasing the magnetic attraction of the electromagnet 43 installed in the installation groove 121 to the magnetic outer frame 3, so that the filter 2 can be stably maintained in the shielding state.

[0077] In addition, the gasket 5 can be made of a material with a sealing effect such as rubber. In the shielding state, the gasket 5 can be used for sealing, which is beneficial to improving the filtering effect of the energy storage cabinet.

[0078] In another possible embodiment, the shape of the gasket 5 is as follows: Figure 7 As shown, the gasket 5 is provided with an avoidance gap 53, and the avoidance gap 53 is used to avoid the installation groove 121. In addition, the area of ​​the gasket 5 of this embodiment is relatively small, which is beneficial to reducing the weight of the gasket 5 and facilitating driving the gasket 5 to move with the magnetic outer frame 3. At the same time, a seal can also be provided on the surface of the external machine 12 to improve the filtering effect.

[0079] In other embodiments, pads may be provided on both sides of the mounting groove 121 . The function of the pads is the same as that of the gasket 5 , and the second end only needs to be slightly raised in the shielding state.

[0080] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed in the embodiment of the present application should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

Claims

1. A thermal management system control method for an energy storage cabinet, characterized in that: The thermal management system comprises a thermal management device (1), a filter (2) and a drive assembly (4); the thermal management device (1) comprises an air inlet (11); the drive assembly (4) is used to drive the filter (2) to move; and the thermal management system control method of the energy storage cabinet comprises at least the following steps: Determining whether the thermal management device (1) is in an on state; When the thermal management device (1) is in the on state, the relative small and medium particle concentration P of the current external environment and the relative small and medium particle concentration threshold P are obtained. th and the hysteresis value a, to determine whether the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th + hysteresis value a; When the relative small and medium particle concentration P of the current external environment is greater than the relative small and medium particle concentration threshold P th + hysteresis value a, turning on the driving component (4) to move the filter screen (2) relative to the air inlet (11) to a shielding state; When the relative small and medium particle concentration P of the current external environment is less than or equal to the relative small and medium particle concentration threshold P th + hysteresis value a, continue to judge whether the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th - Hysteresis value a; When the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th -When the hysteresis value is a, the driving component (4) is closed to allow the filter screen (2) to move relative to the air inlet (11) to a falling state.

2. The thermal management system control method of the energy storage cabinet according to claim 1, characterized in that: In the step of obtaining the relative small and medium particle concentration P of the current external environment, the thermal management system control method of the energy storage cabinet specifically includes: Detect the small particle concentration P1 in the current external environment and the maximum value P of the small and medium particle concentration in the environment where the energy storage cabinet is located. max , and according to the formula: P=P1 / P max , calculate the relative concentration of small and medium particles P in the current external environment.

3. The thermal management system control method of the energy storage cabinet according to claim 2, characterized in that: After obtaining the relative small and medium particle concentration threshold P th In the step, the thermal management system control method of the energy storage cabinet specifically includes: According to the set small and medium particle concentration threshold P2, and according to the formula P th= P2 / P max , calculate the relative small and medium particle concentration threshold P th .

4. The thermal management system control method of the energy storage cabinet according to claim 2, characterized in that: In the step of obtaining the hysteresis value a, the thermal management system control method of the energy storage cabinet specifically includes: Detect the minimum value P of the concentration of small and medium particles in the environment where the energy storage cabinet is located min According to the formula d = (P max- P min ) / P max ; According to the formula: , calculate the hysteresis value a; Among them, m1 is the adjustment coefficient.

5. The thermal management system control method of the energy storage cabinet according to claim 4, characterized in that: Satisfies: 0<a≤0.2×P.

6. The thermal management system control method of the energy storage cabinet according to claim 1, characterized in that: The thermal management system control method of the energy storage cabinet also includes: When the current external environment relative to the concentration of small and medium particles P satisfies: P th -a≤P≤P th +a, the filter (2) is controlled to maintain its original state.

7. The thermal management system control method of the energy storage cabinet according to claim 1, characterized in that: When the relative small and medium particle concentration P of the current external environment is less than the relative small and medium particle concentration threshold P th -hysteresis value a, and before the step of shutting down the drive component (4), the thermal management system control method of the energy storage cabinet specifically includes: The thermal management device (1) is controlled to shut down for t seconds.

8. Energy storage cabinet, characterized in that: The energy storage cabinet comprises a thermal management system control method for an energy storage cabinet according to any one of claims 1 to 7; The energy storage cabinet comprises a thermal management device (1), a filter (2) and a drive assembly (4); the thermal management device (1) comprises an external unit (12) and an air inlet (11); and the drive assembly (4) is used to movably connect the filter (2) to the surface of the external unit (12).

9. The energy storage cabinet according to claim 8, characterized in that: The driving assembly (4) comprises a first connecting member (41) and a second connecting member (42); a magnetic outer frame (3) is further provided on the outer periphery of the filter screen (2); along the height direction of the external machine (12), one end of the magnetic outer frame (3) is connected to the external machine (12) via the first connecting member (41); the other end of the magnetic outer frame (3) is connected to the external machine (12) via the second connecting member (42); the magnetic outer frame (3) can move relative to the second connecting member (42) to drive the filter screen (2) to rotate around the first connecting member (41) relative to the external machine (12).

10. The energy storage cabinet according to claim 9, characterized in that: The driving assembly (4) comprises an electromagnet (43). A mounting groove is provided at the top of the external unit (12). The mounting groove is used to mount the electromagnet (43). When the electromagnet (43) is energized, the magnetic outer frame (3) drives the filter (2) to move toward the external unit (12) to switch to a shielding state. When the electromagnet (43) is not energized, the filter (2) moves away from the external unit (12) to switch to a falling state.

11. The energy storage cabinet according to claim 9, characterized in that: In the falling back state, there is a gap S between the end of the magnetic outer frame (3) connected to the second connecting member (42) and the external unit (12), satisfying: 4cm≤S≤8cm.

12. The energy storage cabinet according to claim 9, characterized in that: A gasket (5) is also provided on the surface of the filter (2) facing the external unit (12); in the shielding state, the gasket (5) is in contact with the surface of the external unit (12), so that an angle θ is formed between the filter (2) and the external unit (12), satisfying 0.5°≤θ≤1°.

13. The energy storage cabinet according to claim 12, characterized in that: Along the direction from the first connecting member (41) to the second connecting member (42), the thickness of the gasket (5) gradually increases.

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