Energy storage system and its control method

Abstract

The present disclosure relates to the field of energy storage technologies, and provides an energy storage system and a control method therefor. The energy storage system includes an energy storage cabinet, a cooling unit, a first sensor, a second sensor, and a controller. An air inlet passage is formed inside the energy storage cabinet. The energy storage cabinet is provided with a first cabinet air inlet and a second cabinet air inlet, and a first filtering device is arranged at the first cabinet air inlet; an air duct switch is arranged at intervals in the air inlet passage; the cooling unit is arranged inside the energy storage cabinet, and the cooling unit is provided with a unit air inlet, and the unit air inlet communicates with a part of the air inlet passage close to the first cabinet air inlet; the first sensor is used for detecting the temperature inside the energy storage cabinet; the second sensor is used for detecting the particulate matter concentration in the environment where the energy storage system is located; the controller is used for controlling the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor. The problem that installing a filtering device at the air inlet will cause derating of the cooling unit can be solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy storage, and particularly relates to an energy storage system and a control method thereof. Background Art

[0002] A cooling unit is installed in the energy storage system to adjust the internal temperature of the energy storage system through the cooling unit and prevent the battery cells from overheating. The cooling unit is provided with an air inlet and an air outlet, and ambient air is sucked in through the air inlet as the cooling medium of the cooling unit for cooling. When the cooling unit is operating, dust may enter the cooling unit and even the entire energy storage system. Therefore, when the energy storage system is installed in an area with low air quality, filtering devices such as filter cotton and filter nets need to be installed at the air inlet of the cooling unit. However, installing the filtering device will increase the air resistance and may cause derating of the cooling unit. Summary of the Invention

[0003] Embodiments of the present disclosure provide an energy storage system and a control method thereof, aiming to solve the problem that installing a filtering device at the air inlet of the cooling unit of the energy storage system will cause derating of the cooling unit.

[0004] According to some embodiments of the present disclosure, on the one hand, an energy storage system is provided, including:

[0005] An energy storage cabinet, in which a battery module is arranged. An air inlet passage is formed in the energy storage cabinet. The energy storage cabinet is provided with a first cabinet air inlet and a second cabinet air inlet that communicate with the air inlet passage. A first filtering device is arranged at the first cabinet air inlet;

[0006] An air duct switch, which is spacedly arranged in the air inlet passage and is located between the first cabinet air inlet and the second cabinet air inlet;

[0007] A cooling unit, which is arranged in the energy storage cabinet. The cooling unit is provided with a unit air inlet, and the unit air inlet communicates with a part of the air inlet passage on the side of the air duct switch close to the first cabinet air inlet;

[0008] A first sensor, which is used to detect the temperature in the energy storage cabinet;

[0009] A second sensor, which is used to detect the particulate matter concentration in the environment where the energy storage system is located;

[0010] A controller, which is electrically connected to the first sensor, the second sensor, and the air duct switch. The controller is used to control the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

[0011] In some embodiments, the air inlet of the unit is located on the side of the air duct switch close to the air inlet of the first cabinet.

[0012] In some embodiments, the air inlet of the first cabinet and the air inlet of the unit are opposite in the air inlet direction of the air inlet of the first cabinet.

[0013] In some embodiments, from the end of the air duct switch close to the air inlet of the unit to the end close to the air inlet of the first cabinet, the air duct switch is arranged to be gradually inclined towards the direction close to the air inlet of the second cabinet.

[0014] In some embodiments, the area of the air inlet of the first cabinet is larger than the area of the air inlet of the second cabinet.

[0015] In some embodiments, the ratio between the area of the air inlet of the first cabinet and the area of the air inlet of the second cabinet is 1 to 3.

[0016] In some embodiments, the ratio between the area of the air inlet of the first cabinet and the area of the air inlet of the second cabinet is 2.

[0017] In some embodiments, a second filtering device is provided at the air inlet of the second cabinet, and the filtering grade of the second filtering device is lower than that of the first filtering device.

[0018] In some embodiments, the cooling unit has a first housing wall provided with the air inlet of the unit, and the first housing wall and the cabinet wall of the energy storage cabinet enclose to form the air inlet channel. The energy storage cabinet has a first cabinet wall opposite to the first housing wall in the air inlet direction of the air inlet of the first cabinet. The first cabinet wall is provided with the air inlet of the first cabinet and the air inlet of the second cabinet, and the air duct switch is arranged between the first housing wall and the first cabinet wall.

[0019] In some embodiments, the air duct switch is an electric louver.

[0020] According to some embodiments of the present disclosure, on the other hand, the present disclosure embodiments further provide a control method for an energy storage system for the above energy storage system. The control method for the energy storage system includes:

[0021] Obtain the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor;

[0022] Control the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

[0023] In some embodiments, controlling the on / off of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor includes:

[0024] If the temperature value detected by the first sensor is greater than the first temperature threshold or the particulate matter concentration value detected by the second sensor is less than the first particulate matter concentration threshold, then control the air duct switch to open;

[0025] If the temperature value detected by the first sensor is less than the first temperature threshold and the particulate matter concentration value detected by the second sensor is greater than the first particulate matter concentration threshold, then control the air duct switch to close.

[0026] In some embodiments, controlling the on / off of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor includes:

[0027] If the temperature value detected by the first sensor is less than the second temperature threshold and the particulate matter concentration value detected by the second sensor is greater than the second particulate matter concentration threshold, then calculate the opening value of the air duct switch according to the preset corresponding relationship, the temperature value detected by the first sensor, and the particulate matter concentration value detected by the second sensor, where the preset corresponding relationship is used to represent the corresponding relationship between the opening value, the temperature value, and the particulate matter concentration value;

[0028] If the calculated value of the opening value of the air duct switch is less than the first preset opening value, then adjust the opening of the air duct switch to the first preset opening value;

[0029] If the calculated value of the opening value of the air duct switch is greater than the first preset opening value and less than the second preset opening value, then adjust the opening of the air duct switch to the calculated value of the opening value of the air duct switch, where the second preset opening value is greater than the first preset opening value;

[0030] If the calculated value of the opening value of the air duct switch is greater than the second preset opening value, then adjust the opening of the air duct switch to the second preset opening value.

[0031] In some embodiments, controlling the on / off of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor includes:

[0032] Obtain the operating parameters of the cooling unit;

[0033] If the obtained operating parameters of the cooling unit indicate that the cooling unit is in the standby state, then control the air duct switch to close;

[0034] If the operating parameters of the cooling unit obtained indicate that the cooling unit is in a working state, then the switch of the air duct switch is controlled according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

[0035] The technical solutions provided by the embodiments of the present disclosure have at least the following advantages:

[0036] In the energy storage system provided by the embodiments of the present disclosure, there are two types of cabinet air inlets, namely a first cabinet air inlet and a second cabinet air inlet, on the energy storage cabinet body, and a first filtering device is only provided at the first cabinet air inlet. When the air duct switch is opened, the cooling unit communicates with the first cabinet air inlet and the second cabinet air inlet through the air inlet channel, so that the cooling unit can intake air through both the first cabinet air inlet and the second cabinet air inlet at the same time; when the air duct switch is closed, the cooling unit only communicates with the first cabinet air inlet through the air inlet channel, so that the cooling unit can intake air only through the first cabinet air inlet provided with the first filtering device; in this way, the controller can, according to the temperature inside the energy storage cabinet detected by the first sensor and the particulate matter concentration in the environment where the energy storage system is located detected by the second sensor, control the switch of the air duct switch to realize the switching of the air intake mode of the cooling unit under different environmental conditions, so as to ensure that the energy storage system can meet the dust-proof requirements under different environmental conditions, and at the same time prevent the problem of derating of the cooling unit caused by setting a filtering device at the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation; in order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following described drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a schematic diagram of a partial structure of an energy storage system provided by the first embodiment of the present disclosure;

[0039] Figure 2 It is Figure 1 a schematic diagram of the structure of the air duct switch in

[0040] Figure 3 It is Figure 2 a sectional view of the air duct switch in

[0041] Figure 4 It is Figure 1 a schematic diagram of the structure of the control part of the energy storage system in

[0042] Figure 5 A partial structural schematic diagram of an energy storage system provided by the second embodiment of the present disclosure;

[0043] Figure 6 A flowchart of a control method for an energy storage system provided by the first embodiment of the present disclosure;

[0044] Figure 7 A flowchart of a control method for an energy storage system provided by the second embodiment of the present disclosure.

[0045] Description of the reference numerals in the accompanying drawings of the present disclosure:

[0046] Energy storage system 100, energy storage cabinet 1, first cabinet wall 11, air inlet channel 2, first air inlet section 21, second air inlet section 22, first cabinet air inlet 3a, second cabinet air inlet 3b, third cabinet air inlet 3c, protective net 31, air duct switch 4, electric louver 4a, cooling unit 5, unit air inlet 51, first housing wall 52, first sensor 6a, second sensor 6b, controller 7. Detailed implementation manners

[0047] As can be seen from the background art, a cooling unit is installed in the energy storage system. The cooling unit is provided with an air inlet and an air outlet. The cooling unit uses a fan installed at the air outlet to cool the cooling medium in the condenser of the cooling unit by inhaling ambient air from the air inlet. Filter devices such as filter cotton and filter nets are usually provided at the air inlet of the cooling unit, but setting the filter device will increase the air resistance and may cause derating of the cooling unit.

[0048] The embodiments of the present disclosure provide an energy storage system and its control method. The energy storage cabinet is provided with two types of cabinet air inlets, namely a first cabinet air inlet and a second cabinet air inlet, and only a first filter device is provided at the first cabinet air inlet. When the air duct switch is opened, the cooling unit communicates with the first cabinet air inlet and the second cabinet air inlet through the air inlet channel, so that the cooling unit can intake air through both the first cabinet air inlet and the second cabinet air inlet at the same time; when the air duct switch is closed, the cooling unit only communicates with the first cabinet air inlet through the air inlet channel, so that the cooling unit can intake air only through the first cabinet air inlet provided with the first filter device; thus, the controller can control the switching of the air intake mode of the cooling unit under different environmental conditions by controlling the opening and closing of the air duct switch according to the temperature inside the energy storage cabinet detected by the first sensor and the particulate matter concentration in the environment where the energy storage system is located detected by the second sensor, so as to ensure that the energy storage system can meet the dust-proof requirements under different environmental conditions while preventing the problem of derating of the cooling unit caused by setting a filter device at the air inlet.

[0049] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined. Similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of pieces" means two or more pieces (including two pieces).

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and is not necessarily referring to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: the existence of A, the simultaneous existence of A and B, and the existence of B. Additionally, the character " / " in this text generally indicates an "or" relationship between the associated objects before and after.

[0052] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present application. For example, if the device or element in the drawing is inverted, then the element described as being "below" or "beneath" or "under" or "at the bottom" of other elements or features will be oriented "above" or "at the top" of the other elements or features. Therefore, the term "below" can cover both the upper and lower orientations depending on the context in which the term is used, which will be obvious to those of ordinary skill in the art. The material can be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatial relative descriptive terms used herein can be interpreted accordingly.

[0053] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0054] In the corresponding drawings of the embodiments of the present application, for better understanding and description, the thickness and area of the layers are enlarged. In addition, when describing that a component is "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor on a partial edge of the entire surface.

[0055] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise specified, other components are not excluded, and other components may further be included. The second component is formed or disposed above or on the first component, or, the second component is formed or disposed on the surface of the first component, or, the second component is formed or disposed on one side of the first component. Embodiments may include those where the first component and the second component are in direct contact, and may also include embodiments where additional components may be present between the first component and the second component such that the first component and the second component may not be in direct contact. For simplicity and clarity, various components may be drawn at arbitrary scales. In the drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, forming or disposing the second component on the surface of the first component means that the first component and the second component are in direct contact. Among them, the above "component" may refer to a layer, a film, a region, a part, a structure, etc.

[0056] The terms used in the description of the various embodiments herein are only for describing specific embodiments and are not intended to be limiting. As used in the descriptions of the various embodiments and the appended claims, "the component" is also intended to include the plural form, unless the context clearly indicates otherwise. Among them, the component includes components such as a layer, a film, a region, or a plate.

[0057] The following will elaborate on the embodiments of the present disclosure in conjunction with the drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present disclosure, many technical details are presented for the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can still be implemented.

[0058] Figures 1 to 5Schematic structural diagram of the energy storage system provided by various embodiments of the present disclosure.

[0059] Referring to Figures 1 to 5 , in some embodiments, the energy storage system 100 includes an energy storage cabinet 1, an air duct switch 4, a cooling unit 5, a first sensor 6a, a second sensor 6b, and a controller 7. A battery module (not shown in the figure) is disposed in the energy storage cabinet 1. An air inlet passage 2 is formed in the energy storage cabinet 1. The energy storage cabinet 1 is provided with a first cabinet air inlet 3a and a second cabinet air inlet 3b that communicate with the air inlet passage 2. A first filtering device (not shown in the figure) is disposed at the first cabinet air inlet 3a; the air duct switch 4 is disposed at intervals in the air inlet passage 2, and the air duct switch 4 is located between the first cabinet air inlet 3a and the second cabinet air inlet 3b; the cooling unit 5 is disposed in the energy storage cabinet 1, and the cooling unit 5 is provided with a unit air inlet 51, and the unit air inlet 51 communicates with a part of the air inlet passage 2 on the side of the air duct switch 4 close to the first cabinet air inlet 3a; the first sensor 6a is used to detect the temperature inside the energy storage cabinet 1; the second sensor 6b is used to detect the particulate matter concentration in the environment where the energy storage system 100 is located; the controller 7 is electrically connected to the first sensor 6a, the second sensor 6b, and the air duct switch 4, and the controller 7 is used to control the opening and closing of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particulate matter concentration value detected by the second sensor 6b.

[0060] Specifically, the energy storage system 100 includes an energy storage cabinet 1, and the energy storage cabinet 1 is used to isolate components such as internal electrical components of the energy storage system 100 from the external environment. A cooling unit 5 and a battery module are disposed in the energy storage cabinet 1. The cooling unit 5 can be an air-cooled unit or a liquid-cooled unit, etc. By means of the cooling unit 5, overheating of the battery cells can be avoided. Hereinafter, the energy storage system 100 is an immersion energy storage system and the cooling unit 5 is a liquid-cooled unit as an example for introduction. The cooling unit 5 can adjust the temperature of the coolant in the energy storage system 100 to avoid overheating of the battery cells.

[0061] The cooling unit 5 includes a casing, which is provided with a unit air inlet 51 and a unit air outlet. A unit fan is arranged inside the casing. When the unit fan operates, air can be sucked into the cooling unit 5 from the unit air inlet 51, take away heat and then be discharged from the unit air outlet. Inside the energy storage cabinet body 1, an air inlet passage 2 is formed at intervals, and a first cabinet body air inlet 3a and a second cabinet body air inlet 3b are formed on the cabinet body wall of the energy storage cabinet body 1 corresponding to the air inlet passage 2. Both the first cabinet body air inlet 3a and the second cabinet body air inlet 3b are communicated with the air inlet passage 2. Inside the air inlet passage 2, air duct switches 4 are arranged at intervals corresponding to the first cabinet body air inlet 3a and the second cabinet body air inlet 3b. The air duct switch 4 is located between the first cabinet body air inlet 3a and the second cabinet body air inlet 3b, so as to divide the air inlet passage 2 into a first air inlet section 21 communicating with the first cabinet body air inlet 3a and a second air inlet section 22 communicating with the second cabinet body air inlet 3b through the air duct switch 4. When the air duct switch 4 is opened, the first air inlet section 21 is communicated with the second air inlet section 22; when the air duct switch 4 is closed, the first air inlet section 21 is not communicated with the second air inlet section 22. Among them, the shape of the air duct switch 4 is adapted to the shape of the air inlet passage 2, and the air duct switch 4 can be a wind valve or an electric louver 4a, etc. Optionally, referring to Figures 1 to 3 , in some embodiments, the air duct switch 4 is an electric louver 4a. The setting method of such an air duct switch 4 is relatively simple. Hereinafter, the air duct switch 4 being an electric louver 4a will be taken as an example for introduction.

[0062] A first filtering device is arranged at the first cabinet body air inlet 3a. In this way, the first filtering device can filter the air entering the air inlet passage 2 from the first cabinet body air inlet 3a. Among them, the first filtering device can be made of filtering materials such as non-woven fabric and filter cotton that can filter tiny particles in the air. The first filtering device can be fixedly installed inside or outside the first cabinet body air inlet 3a by installation methods such as screw fixation or structural adhesive bonding.

[0063] The air resistance of the air inlet 3b of the second cabinet is smaller than that of the air inlet 3a of the first cabinet. A filtering device may not be provided at the air inlet 3b of the second cabinet; a filtering device with a filtering level lower than that of the first filtering device may also be provided at the air inlet 3b of the second cabinet. Optionally, in some embodiments, a second filtering device is provided at the air inlet 3b of the second cabinet, and the filtering level of the second filtering device is lower than that of the first filtering device. The second filtering device with a filtering level lower than that of the first filtering device can be selected and installed at the air inlet 3b of the second cabinet according to the air quality of the local environment where the energy storage system 100 is located. In this way, the second filtering device can filter the air entering the air inlet passage 2 from the air inlet 3b of the second cabinet. Since the filtering level of the second filtering device is lower than that of the first filtering device, the air resistance of the second filtering device is also smaller than that of the first filtering device, and the derating of the cooling unit 5 caused by the second filtering device is smaller than the derating of the cooling unit 5 caused by the first filtering device. Hereinafter, the case where no filtering device is provided at the air inlet 3b of the second cabinet will be described as an example.

[0064] The part of the air inlet passage 2 located on the side of the air duct switch 4 close to the air inlet 3a of the first cabinet is the first air inlet section 21, and the part of the air inlet passage 2 located on the side of the air duct switch 4 close to the air inlet 3b of the second cabinet is the second air inlet section 22. Then, the air inlet 51 of the unit is connected to the part of the air inlet passage 2 located on the side of the air duct switch 4 close to the air inlet 3a of the first cabinet, that is, the air inlet 51 of the unit is connected to the first air inlet section 21. When the air duct switch 4 is opened, the first air inlet section 21 is connected to the second air inlet section 22, so that the second air inlet section 22 is connected to the air inlet 51 of the unit through the first air inlet section 21. In this way, the air inlet 51 of the unit is connected to both the air inlet 3a of the first cabinet and the air inlet 3b of the second cabinet with a smaller air resistance through the air inlet passage 2. At this time, the cooling unit 5 can intake air simultaneously through the air inlet 3a of the first cabinet and the air inlet 3b of the second cabinet with a smaller air resistance, thereby reducing the derating of the cooling unit 5 caused by the air resistance of the cabinet air inlet. When the air duct switch 4 is closed, the first air inlet section 21 is not connected to the second air inlet section 22, so that the second air inlet section 22 is not connected to the air inlet 51 of the unit. In this way, the air inlet 51 of the unit is only connected to the air inlet 3a of the first cabinet and not connected to the air inlet 3b of the second cabinet. At this time, the cooling unit 5 can intake air only through the air inlet 3a of the first cabinet provided with the first filtering device, so that the air entering the energy storage system 100 will pass through the first filtering device for filtering, ensuring that the energy storage system 100 can meet the dust prevention requirements under different environmental conditions.

[0065] As introduced above, by controlling the opening and closing of the air duct switch 4, the cooling unit 5 has a first air intake mode and a second air intake mode. When the cooling unit 5 is in the first air intake mode, the air duct switch 4 is open, and the cooling unit 5 intakes air through the first cabinet air inlet 3a and the second cabinet air inlet 3b simultaneously. When the cooling unit 5 is in the second air intake mode, the air duct switch 4 is closed, and the cooling unit 5 intakes air only through the first cabinet air inlet 3a.

[0066] The energy storage system 100 is provided with a first sensor 6a. The first sensor 6a is a temperature sensor, and the temperature inside the energy storage cabinet 1 can be detected in real time or periodically through the first sensor 6a. The specific installation position of the first sensor 6a on the energy storage system 100 can be set according to the actual situation. For example, the first sensor 6a is installed inside the energy storage cabinet 1 corresponding to the battery module to detect the temperature of the battery module through the first sensor 6a. Hereinafter, the case where the first sensor 6a is used to detect the temperature of the battery module will be taken as an example for introduction. The first sensor 6a is electrically connected to the controller 7, so that the first sensor 6a can send the detected temperature value to the controller 7.

[0067] The energy storage system 100 is provided with a second sensor 6b. The second sensor 6b is a particulate matter concentration sensor, and the particulate matter concentration in the environment where the energy storage system 100 is located can be detected in real time or periodically through the second sensor 6b. The specific installation position of the second sensor 6b can be set according to the actual situation. The second sensor 6b can be installed on the energy storage cabinet 1; the second sensor 6b can also be installed at any position in the environment where the energy storage system 100 is located. For example, the second sensor 6b can be installed on the energy storage cabinet 1, and the second sensor 6b is located at the first cabinet air inlet 3a or the second cabinet air inlet 3b. The second sensor 6b is electrically connected to the controller 7, so that the second sensor 6b can send the detected particulate matter concentration value to the controller 7. Among them, the particulate matter concentration detected by the second sensor 6b can be PM2.5 or PM10, etc. Hereinafter, the case where the particulate matter concentration detected by the second sensor 6b is PM10 will be taken as an example for introduction.

[0068] The controller 7 is electrically connected to the air duct switch 4, and the opening and closing of the air duct switch 4 can be controlled through the controller 7. The controller 7 can be the original battery management system of the energy storage system 100, or the controller 7 can also be a newly added control device. Hereinafter, the case where the controller 7 is the battery management system of the energy storage system 100 will be taken as an example for introduction. The controller 7 is usually used to control the charging and discharging of the battery module, the start and stop of the cooling unit 5, and monitor various key data inside the energy storage system 100, etc.

[0069] The controller 7 pre-stores a thermal management strategy, and the controller 7 is electrically connected to the cooling unit 5. In this way, the controller 7 can control the start and stop of the cooling unit 5 according to the thermal management strategy. The controller 7 can, based on the thermal management strategy and according to the temperature value detected by the first sensor 6a and the particulate matter concentration value detected by the second sensor 6b, control the opening and closing of the air duct switch 4 to switch the air intake mode of the cooling unit 5. For example, when the content of small-sized particles in the environment where the energy storage system 100 is located is relatively high, that is, when the particulate matter concentration value detected by the second sensor 6b is greater than the preset particulate matter concentration threshold, the controller 7 controls the air duct switch 4 to close, and switches the cooling unit 5 to the second air intake mode, so that the cooling unit 5 only intakes air through the first cabinet air inlet 3a provided with the first filtering device; when the content of small-sized particles in the environment where the energy storage system 100 is located is relatively low, that is, when the particulate matter concentration value detected by the second sensor 6b is less than the preset particulate matter concentration threshold, the controller 7 controls the air duct switch 4 to open, and switches the cooling unit 5 to the first air intake mode, so that the cooling unit 5 intakes air through the first cabinet air inlet 3a and the second cabinet air inlet 3b with relatively small air resistance at the same time. In this way, it is possible to realize the switching of the air intake mode of the cooling unit 5 under different environmental conditions, so as to ensure that the energy storage system 100 can operate under different environmental conditions.

[0070] The energy storage cabinet 1 is provided with two types of cabinet air inlets, namely the first cabinet air inlet 3a and the second cabinet air inlet 3b, and only the first filtering device is provided at the first cabinet air inlet 3a. When the air duct switch 4 is open, the cooling unit 5 is connected to the first cabinet air inlet 3a and the second cabinet air inlet 3b through the air intake channel 2, so as to realize that the cooling unit 5 intakes air through the first cabinet air inlet 3a and the second cabinet air inlet 3b at the same time; when the air duct switch 4 is closed, the cooling unit 5 is only connected to the first cabinet air inlet 3a through the air intake channel 2, so as to realize that the cooling unit 5 only intakes air through the first cabinet air inlet 3a provided with the first filtering device; in this way, the controller 7 can, according to the temperature inside the energy storage cabinet 1 detected by the first sensor 6a and the particulate matter concentration in the environment where the energy storage system 100 is located detected by the second sensor 6b, control the opening and closing of the air duct switch 4 to realize the switching of the air intake mode of the cooling unit 5 under different environmental conditions, so as to ensure that the energy storage system 100 can meet the dust-proof requirements under different environmental conditions while preventing the problem of derating of the cooling unit 5 caused by the installation of the filtering device at the air inlet.

[0071] The embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0072] The air inlet direction of the air inlet (such as the first cabinet air inlet 3a, the second cabinet air inlet 3b, or the unit air inlet 51, etc.) is the direction perpendicular to the plane where the air inlet is located. The air inlet directions of the first cabinet air inlet 3a and the second cabinet air inlet 3b may be the same or different. The first cabinet air inlet 3a and the second cabinet air inlet 3b may be located on the same cabinet wall of the energy storage cabinet 1; the first cabinet air inlet 3a and the second cabinet air inlet 3b may also be located on different cabinet walls of the energy storage cabinet 1. Similarly, the air inlet directions of the first cabinet air inlet 3a and the unit air inlet 51 may be the same or different.

[0073] Optionally, referring to Figure 1 and Figure 5 , in some embodiments, the cooling unit 5 has a first housing wall 52 provided with a unit air inlet 51, and the energy storage cabinet 1 has a first cabinet wall 11 opposite to the first housing wall 52 in the air inlet direction of the first cabinet air inlet 3a. The first cabinet wall 11 is provided with a first cabinet air inlet 3a and a second cabinet air inlet 3b.

[0074] Specifically, the air inlet directions of the three air inlets, namely the first cabinet air inlet 3a, the second cabinet air inlet 3b, and the unit air inlet 51, are the same or approximately the same. This is beneficial to reducing the air resistance during the process of air flowing from the first cabinet air inlet 3a and the second cabinet air inlet 3b to the unit air inlet 51. Both the first cabinet air inlet 3a and the second cabinet air inlet 3b are located on the first cabinet wall 11 of the energy storage cabinet 1. The first cabinet air inlet 3a may be located above, below, or on one side in the horizontal direction of the second cabinet air inlet 3b. Hereinafter, an example will be given where both the first cabinet air inlet 3a and the second cabinet air inlet 3b are provided on the first cabinet wall 11, and the first cabinet air inlet 3a is located above the second cabinet air inlet 3b.

[0075] Optionally, referring to Figure 1 and Figure 5 , in some embodiments, protective nets 31 are provided at the first cabinet air inlet 3a and the second cabinet air inlet 3b. Thus, by installing the protective nets 31 at the first cabinet air inlet 3a and the second cabinet air inlet 3b, the protective nets 31 can prevent relatively large sundries from passing through the first cabinet air inlet 3a and the second cabinet air inlet 3b and entering the air inlet passage 2. Similarly, a protective net 31 may not be provided at the unit air inlet 51; a protective net 31 may also be provided at the unit air inlet 51. When a protective net 31 is provided at the unit air inlet 51, the protective net 31 can prevent relatively large sundries from passing through the unit air inlet 51 and entering the cooling unit 5.

[0076] Optionally, referring to Figure 1 and Figure 5, in some embodiments, the air inlet 51 of the unit is located on the side of the air duct switch 4 close to the air inlet 3a of the first cabinet. In this way, the air inlet 51 of the unit is located above the air duct switch 4, which is beneficial to directly connect the air inlet 51 of the unit with the first air inlet section 21 and also stagger the air inlet 51 of the unit from the second air inlet section 22.

[0077] Both the air inlet 3a of the first cabinet and the air inlet 51 of the unit are located above the air inlet 3b of the second cabinet. The air inlet 3a of the first cabinet and the air inlet 51 of the unit can be arranged facing each other; the air inlet 3a of the first cabinet and the air inlet 51 of the unit can also be arranged staggeredly. Optionally, referring to Figure 1 and Figure 5 , in some embodiments, the air inlet 3a of the first cabinet and the air inlet 51 of the unit are opposite to each other in the air inlet direction of the air inlet 3a of the first cabinet. The air inlet 3a of the first cabinet and the air inlet 51 of the unit are arranged facing each other in the air inlet direction of the air inlet 3a of the first cabinet, which is beneficial to reducing the air resistance during the process of air flowing from the air inlet 3a of the first cabinet to the air inlet 51 of the unit.

[0078] The area of the air inlet 3a of the first cabinet and the area of the air inlet 3b of the second cabinet can be equal or not equal. Optionally, referring to Figure 1 and Figure 5 , in some embodiments, the area of the air inlet 3a of the first cabinet is larger than the area of the air inlet 3b of the second cabinet. The sum of the areas of the air inlet 3a of the first cabinet and the air inlet 3b of the second cabinet is related to the area of the first cabinet wall 52. Since the cooling unit 5 needs to intake air through the air inlet 3a of the first cabinet in both the first air intake mode and the second air intake mode, and the air resistance of the air inlet 3a of the first cabinet is greater than that of the air inlet 3b of the second cabinet, setting the area of the air inlet 3a of the first cabinet larger than the area of the air inlet 3b of the second cabinet is beneficial to ensuring that the cooling unit 5 has sufficient air volume for cooling.

[0079] Optionally, in some embodiments, the ratio between the area of the air inlet 3a of the first cabinet and the area of the air inlet 3b of the second cabinet is 1 - 3.

[0080] Specifically, the area of the air inlet 3a of the first cabinet is N times the area of the air inlet 3b of the second cabinet, where N is 1 - 3. For example, N can be 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 or 3, etc. Setting the value range of N in this way is beneficial to ensuring that the cooling unit 5 has sufficient air volume for cooling. Further, the ratio between the area of the air inlet 3a of the first cabinet and the area of the air inlet 3b of the second cabinet is 2.

[0081] The area of the first cabinet air inlet 3a and the area of the unit air inlet 51 may be equal or unequal. Optionally, referring to Figure 1 and Figure 5 , in some embodiments, the area of the first cabinet air inlet 3a is greater than the area of the unit air inlet 51, which is also beneficial to ensuring that the cooling unit 5 has sufficient air volume for cooling.

[0082] The area of the second cabinet air inlet 3b and the area of the unit air inlet 51 may be equal or unequal. Optionally, referring to Figure 1 and Figure 5 , in some embodiments, the area of the unit air inlet 51 is greater than the area of the second cabinet air inlet 3b, which is also beneficial to ensuring that the cooling unit 5 has sufficient air volume for cooling.

[0083] Optionally, in some embodiments, from the end of the air duct switch 4 close to the unit air inlet 51 to the end close to the first cabinet air inlet 3a, the air duct switch 4 is arranged to be gradually inclined towards the direction close to the second cabinet air inlet 3b. The air duct switch 4 is arranged to be gradually inclined downwards in the direction from the unit air inlet 51 to the first cabinet air inlet 3a, which is beneficial to realizing the design of the area of the first cabinet air inlet 3a > the area of the unit air inlet 51 > the area of the second cabinet air inlet 3b.

[0084] Optionally, referring to Figure 1 and Figure 5 , in some embodiments, the first housing wall 52 and the cabinet wall of the energy storage cabinet 1 enclose an air inlet passage 2. The first cabinet wall 11 of the energy storage cabinet 1 is opposite to the first housing wall 52 in the air inlet direction of the first cabinet air inlet 3a, and the air duct switch 4 is arranged between the first housing wall 52 and the first cabinet wall 11.

[0085] Specifically, the air duct switch 4 has two states: open and closed. When the air duct switch 4 is in the closed state, the air duct switch 4 can prevent the air flow between the first air inlet section 21 and the second air inlet section 22; when the air duct switch 4 is in the open state, the air duct switch 4 connects the first air inlet section 21 and the second air inlet section 22.

[0086] Optionally, referring to Figure 5 , in some embodiments, the second air inlet section 22 is provided with a third cabinet air inlet 3c. The third cabinet air inlet 3c is located below the cooling unit 5, and the third cabinet air inlet 3c is opposite to the second cabinet air inlet 3b in the air inlet direction of the second cabinet air inlet 3b. Electrical components are usually arranged inside the energy storage cabinet 1 and below the cooling unit 5. When the cooling unit 5 is in the first air inlet mode, the air in the second air inlet section 22 can flow from the third cabinet air inlet 3c to the lower side of the cooling unit 5 to cool the electrical components located on the lower side of the cooling unit 5.

[0087] There are various specific implementation manners for the controller 7 to control the opening and closing of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particulate matter concentration value detected by the second sensor 6b. Optionally, in some embodiments, if the temperature value detected by the first sensor 6a is greater than the first temperature threshold or the particulate matter concentration value detected by the second sensor 6b is less than the first particulate matter concentration threshold, the controller 7 controls the air duct switch 4 to open; if the temperature value detected by the first sensor 6a is less than the first temperature threshold and the particulate matter concentration value detected by the second sensor 6b is greater than the first particulate matter concentration threshold, the controller 7 controls the air duct switch 4 to close.

[0088] Specifically, the temperature value detected by the first sensor 6a is T, the first temperature threshold is T1, the particulate matter concentration value detected by the second sensor 6b is P, and the first particulate matter concentration threshold is P1.

[0089] After the controller 7 obtains the temperature value T detected by the first sensor 6a and the particulate matter concentration value P detected by the second sensor 6b, the controller 7 can first determine the magnitude relationship between the particulate matter concentration value P detected by the second sensor 6b and the first particulate matter concentration threshold P1. If P < P1, the controller 7 controls the air duct switch 4 to open; if P > P1, the controller 7 then determines the magnitude relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold T1. If T < T1, the controller 7 controls the air duct switch 4 to close; if T > T1, the controller 7 controls the air duct switch 4 to open. In this way, while ensuring that the energy storage system 100 can meet the dust prevention requirements under different environmental conditions, the energy storage system 100 has higher cooling efficiency and safety performance.

[0090] After the controller 7 obtains the temperature value T detected by the first sensor 6a and the particulate matter concentration value P detected by the second sensor 6b, the controller 7 can also first determine the magnitude relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold T1. If T > T1, the controller 7 controls the air duct switch 4 to open; if T < T1, the controller 7 then determines the magnitude relationship between the particulate matter concentration value P detected by the second sensor 6b and the first particulate matter concentration threshold P1. If P < P1, the controller 7 controls the air duct switch 4 to open; if P > P1, the controller 7 controls the air duct switch 4 to close. In this way, while ensuring that the energy storage system 100 can meet the dust prevention requirements under different environmental conditions, the energy storage system 100 has higher cooling efficiency and safety performance.

[0091] Optionally, in some embodiments, the controller 7 determines whether the cooling unit 5 is in a working state; if the cooling unit 5 is in a non-working state, the controller 7 controls the air duct switch 4 to close; if the cooling unit 5 is in a working state, the controller 7 determines the magnitude relationship between the particulate matter concentration value P detected by the second sensor 6b and the first particulate matter concentration threshold P1, or determines the magnitude relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold T1.

[0092] Specifically, the controller 7 first determines whether the cooling unit 5 is in a working state. When the cooling unit 5 is in a non-working state (or standby state), there is no derating risk, so the controller 7 controls the air duct switch 4 to close to ensure that external dust does not enter the energy storage system 100.

[0093] Optionally, in some embodiments, if the temperature value detected by the first sensor 6a is less than the second temperature threshold and the particulate matter concentration value detected by the second sensor 6b is greater than the second particulate matter concentration threshold, the opening value of the air duct switch 4 is calculated according to the preset corresponding relationship, the temperature value detected by the first sensor 6a, and the particulate matter concentration value detected by the second sensor 6b; if the calculated value of the opening value of the air duct switch 4 is less than the first preset opening value, the opening of the air duct switch 4 is adjusted to the first preset opening value; if the calculated value of the opening value of the air duct switch 4 is greater than the first preset opening value and less than the second preset opening value, the opening of the air duct switch 4 is adjusted to the calculated value of the opening value of the air duct switch 4; if the calculated value of the opening value of the air duct switch 4 is greater than the second preset opening value, the opening of the air duct switch 4 is adjusted to the second preset opening value.

[0094] Specifically, the second temperature threshold is T2, the second particulate matter concentration threshold is P2, the calculated value of the opening value of the air duct switch 4 is F, the calculated value of the opening value of the air duct switch 4 is F, the first preset opening value is F1, the second preset opening value is F2, the second preset opening value F2 is greater than the first preset opening value F1, and 0 ≤ F1 < F2 ≤ 1. The preset corresponding relationship is used to characterize the corresponding relationship between the opening value F, the temperature value T, and the particulate matter concentration value P, and the preset corresponding relationship can correspond to a table or a formula, etc.

[0095] If T < T2, the controller 7 controls the air duct switch 4 to close. If T > T2 and P < P2, the controller 7 controls the air duct switch 4 to open, that is, adjusts the opening of the air duct switch 4 to 1. If T > T2 and P > P2, the controller 7 calculates the opening value of the air duct switch 4 according to T, P, and the preset corresponding relationship to obtain the calculated value F of the opening value of the air duct switch 4. If F < F1, the controller 7 adjusts the opening of the air duct switch 4 to F1; if F1 < F < F2, the controller 7 adjusts the opening of the air duct switch 4 to F; if F > F2, the controller 7 adjusts the opening of the air duct switch 4 to F2.

[0096] Correspondingly, another embodiment of the present disclosure further provides a control method for an energy storage system, which can be implemented based on the energy storage system provided in the above embodiment. The following will describe in detail the control method for the energy storage system provided in another embodiment of the present disclosure with reference to the accompanying drawings. For the same or corresponding parts as those in the previous embodiment, reference can be made to the corresponding description in the foregoing embodiment, and details will not be repeated hereinafter.

[0097] Figure 6 It is a flowchart of the control method for the energy storage system provided in an embodiment of the present disclosure.

[0098] Referring to Figure 6 , in some embodiments, the control method for the energy storage system includes the following steps:

[0099] Step S610: Obtain the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

[0100] Specifically, the first sensor 6a detects the temperature T inside the energy storage cabinet 1 in real time, and the second sensor 6b detects the particulate matter concentration P in the environment where the energy storage system 100 is located in real time. The controller 7 can obtain the temperature value T detected by the first sensor 6a and the particulate matter concentration value P detected by the second sensor 6b.

[0101] Step S620: Control the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

[0102] Specifically, after the controller 7 obtains the temperature value T detected by the first sensor 6a and the particulate matter concentration value P detected by the second sensor 6b, the controller 7 can control the opening and closing of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particulate matter concentration value detected by the second sensor 6b.

[0103] For example, when the content of small-sized particles in the environment where the energy storage system 100 is located is relatively high, that is, the particulate matter concentration value detected by the second sensor 6b is greater than the preset particulate matter concentration threshold, the controller 7 controls the air duct switch 4 to close, and switches the cooling unit 5 to the second air inlet mode, so that the cooling unit 5 only enters air through the first cabinet air inlet 3a provided with the first filtering device; when the content of small-sized particles in the environment where the energy storage system 100 is located is relatively low, that is, the particulate matter concentration value detected by the second sensor 6b is less than the preset particulate matter concentration threshold, the controller 7 controls the air duct switch 4 to open, and switches the cooling unit 5 to the first air inlet mode, so that the cooling unit 5 enters air through the first cabinet air inlet 3a and the second cabinet air inlet 3b with relatively small air resistance at the same time.

[0104] Optionally, in some embodiments, step S620 includes: if the temperature value detected by the first sensor 6a is greater than the first temperature threshold or the particulate matter concentration value detected by the second sensor 6b is less than the first particulate matter concentration threshold, then control the air duct switch 4 to open; if the temperature value detected by the first sensor 6a is less than the first temperature threshold and the particulate matter concentration value detected by the second sensor 6b is greater than the first particulate matter concentration threshold, then control the air duct switch 4 to close.

[0105] Specifically, after the controller 7 obtains the temperature value T detected by the first sensor 6a and the particulate matter concentration value P detected by the second sensor 6b, the controller 7 can first determine the magnitude relationship between the particulate matter concentration value P detected by the second sensor 6b and the first particulate matter concentration threshold P1. If P < P1, then the controller 7 controls the air duct switch 4 to open; if P > P1, then the controller 7 further determines the magnitude relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold T1. If T < T1, then the controller 7 controls the air duct switch 4 to close; if T > T1, then the controller 7 controls the air duct switch 4 to open. In this way, while ensuring that the energy storage system 100 can meet the dust prevention requirements under different environmental conditions, the energy storage system 100 has higher cooling efficiency and safety performance. Among them, in some embodiments, P1 is 200 μg / m 3 ~400 μg / m 3 , T1 is 30°C to 50°C. For example, P1 can be 200 μg / m 3 、210 μg / m 3 、220 μg / m 3 、230 μg / m 3 、240 μg / m 3 、250 μg / m 3 、260 μg / m 3 、270 μg / m 3 、280 μg / m 3 、290 μg / m 3 、300 μg / m 3 、310 μg / m 3 、320 μg / m 3 、330 μg / m 3 、340 μg / m 3 、350 μg / m 3 、360 μg / m 3 、370 μg / m 3 、380 μg / m 3 、390 μg / m 3 or 400 μg / m 3etc. T1 can be 30°C, 31°C, 32°C, 33°C, 34°C, 35°C, 36°C, 37°C, 38°C, 39°C, 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C or 50°C, etc.

[0106] After the controller 7 obtains the temperature value T detected by the first sensor 6a and the particulate matter concentration value P detected by the second sensor 6b, the controller 7 can also first determine the magnitude relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold T1. If T > T1, the controller 7 controls the air duct switch 4 to open; if T < T1, the controller 7 then determines the magnitude relationship between the particulate matter concentration value P detected by the second sensor 6b and the first particulate matter concentration threshold P1. If P < P1, the controller 7 controls the air duct switch 4 to open; if P > P1, the controller 7 controls the air duct switch 4 to close. In this way, while ensuring that the energy storage system 100 can meet the dust prevention requirements under different environmental conditions, the energy storage system 100 has higher cooling efficiency and safety performance.

[0107] Optionally, in some embodiments, step S620 includes: if the temperature value detected by the first sensor 6a is less than the second temperature threshold and the particulate matter concentration value detected by the second sensor 6b is greater than the second particulate matter concentration threshold, calculate the opening value of the air duct switch 4 according to the preset correspondence, the temperature value detected by the first sensor 6a, and the particulate matter concentration value detected by the second sensor 6b; if the calculated value of the opening value of the air duct switch 4 is less than the first preset opening value, adjust the opening of the air duct switch 4 to the first preset opening value; if the calculated value of the opening value of the air duct switch 4 is greater than the first preset opening value and less than the second preset opening value, adjust the opening of the air duct switch 4 to the calculated value of the opening value of the air duct switch 4; if the calculated value of the opening value of the air duct switch 4 is greater than the second preset opening value, adjust the opening of the air duct switch 4 to the second preset opening value, where the second preset opening value is greater than the first preset opening value.

[0108] If T < T2, the controller 7 controls the air duct switch 4 to close. If T > T2 and P < P2, the controller 7 controls the air duct switch 4 to open, that is, adjusts the opening of the air duct switch 4 to 1. If T > T2 and P > P2, the controller 7 calculates the opening value F of the air duct switch 4 according to T, P, and the preset correspondence. If F < F1, the controller 7 adjusts the opening of the air duct switch 4 to F1; if F1 < F < F2, the controller 7 adjusts the opening of the air duct switch 4 to F; if F > F2, the controller 7 adjusts the opening of the air duct switch 4 to F2.

[0109] Optionally, in some embodiments, step S620 includes: obtaining the operating parameters of the cooling unit 5; if the obtained operating parameters of the cooling unit 5 indicate that the cooling unit 5 is in the standby state, controlling the air duct switch 4 to close; if the obtained operating parameters of the cooling unit 5 indicate that the cooling unit 5 is in the working state, controlling the opening and closing of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particulate matter concentration value detected by the second sensor 6b.

[0110] Specifically, the controller 7 first determines whether the cooling unit 5 is in the working state. When the cooling unit 5 is in the non-working state (or standby state), there is no derating risk, so the controller 7 controls the air duct switch 4 to close to ensure that external dust does not enter the energy storage system 100.

[0111] Figure 7 It is a flowchart of the control method for the energy storage system provided by an embodiment of the present disclosure.

[0112] Reference Figure 7 , in some embodiments, the control method of the energy storage system includes the following steps:

[0113] The first step: obtaining the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

[0114] The second step: determining whether the cooling unit is in the working state.

[0115] Specifically, it is determined whether the fan of the cooling unit 5 is in the working state. When the fan is in the non-working state, there is no derating risk for the cooling unit 5, so the air duct switch 4 is closed to ensure that external dust does not enter the energy storage system 100. If so, the third step is executed; if not, the fifth step is executed.

[0116] The third step: determining whether the particulate matter concentration value detected by the second sensor is greater than the first particulate matter concentration threshold.

[0117] Specifically, if so, it means that the content of small particle size particles in the environment where the energy storage system 100 is located is low, then the sixth step is executed to control the air duct switch 4 to open to ensure the refrigeration capacity of the cooling unit 5. If not, the fourth step is executed.

[0118] The fourth step: determining whether the temperature value detected by the first sensor is greater than the first temperature threshold.

[0119] Specifically, if so, it means that there is a risk of excessive temperature in the energy storage system 100, then the sixth step is executed to give priority to ensuring the refrigeration capacity of the cooling unit 5. If not, the fifth step is executed.

[0120] The fifth step: controlling the air duct switch 4 to close.

[0121] The sixth step: controlling the air duct switch 4 to open.

[0122] In some embodiments, the control method of the energy storage system includes the following steps:

[0123] First step: Obtain the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

[0124] Second step: Determine whether the temperature value detected by the first sensor is greater than the third temperature threshold.

[0125] Specifically, if not, then execute the third step; if so, it means that there is a risk of excessive temperature in the energy storage system 100, control the air duct switch 4 to open, that is, adjust the opening degree of the air duct switch 4 to 1, and give priority to ensuring the refrigeration capacity of the cooling unit 5. The third temperature threshold is T3, T3 > T2, where, in some embodiments, T3 is 40°C to 60°C, and T3 can be 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C, 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C or 60°C, etc.

[0126] Third step: Calculate the opening value of the air duct switch according to the preset corresponding relationship, the temperature value detected by the first sensor, and the particulate matter concentration value detected by the second sensor.

[0127] Specifically, in some embodiments, the preset corresponding relationship is F = F1 + (T - T2) / (T3 - T2) + (P2 - P) / 2P2.

[0128] In some embodiments, F1 is 0.4 to 0.6, and F2 is 0.8 to 1. For example, F1 can be 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59 or 0.6, etc., while F2 can be 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99 or 1, etc.

[0129] In some embodiments, P2 is 200 μg / m 3 ~400 μg / m 3 , T2 is 30°C to 50°C. For example, P2 can be 200 μg / m 3 、210 μg / m 3 、220 μg / m 3 、230 μg / m3 , 240 μg / m 3 , 250 μg / m 3 , 260 μg / m 3 , 270 μg / m 3 , 280 μg / m 3 , 290 μg / m 3 , 300 μg / m 3 , 310 μg / m 3 , 320 μg / m 3 , 330 μg / m 3 , 340 μg / m 3 , 350 μg / m 3 , 360 μg / m 3 , 370 μg / m 3 , 380 μg / m 3 , 390 μg / m 3 or 400 μg / m 3 etc. And T2 can be 30 °C, 31 °C, 32 °C, 33 °C, 34 °C, 35 °C, 36 °C, 37 °C, 38 °C, 39 °C, 40 °C, 41 °C, 42 °C, 43 °C, 44 °C, 45 °C, 46 °C, 47 °C, 48 °C, 49 °C or 50 °C etc.

[0130] In some embodiments, F1 = 0.5, F2 = 1, T2 = 35, T3 = 45, P2 = 300, F = 0.5 + (T - 35) / 10 + (300 - P) / 600.

[0131] Step 4: Determine whether the calculated value of the opening degree of the air duct switch is greater than the first preset opening degree value.

[0132] Specifically, if so, execute Step 5; if not, execute Step 6.

[0133] Step 5: Determine whether the calculated value of the opening degree of the air duct switch is greater than the second preset opening degree value.

[0134] Specifically, if so, execute Step 7; if not, adjust the opening degree of the air duct switch to the calculated value of the opening degree or the second preset opening degree value.

[0135] Step 6: Adjust the opening degree of the air duct switch to the first preset opening degree value.

[0136] Step 7: Adjust the opening degree of the air duct switch to the second preset opening degree value.

[0137] Those of ordinary skill in the art can understand that the above-described embodiments are specific examples for implementing the present disclosure. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the scope defined by the claims.

Claims

1. An energy storage system, characterized in that, Comprising: An energy storage cabinet body, in which a battery module is arranged, an air inlet channel is formed in the energy storage cabinet body, a first cabinet body air inlet and a second cabinet body air inlet communicating with the air inlet channel are formed in the energy storage cabinet body, a first filtering device is arranged at the first cabinet body air inlet, and the air resistance of the second cabinet body air inlet is smaller than that of the first cabinet body air inlet; An air duct switch, which is spacedly arranged in the air inlet channel and is located between the first cabinet body air inlet and the second cabinet body air inlet; A cooling unit, which is arranged in the energy storage cabinet body, and the cooling unit is provided with a unit air inlet, and the unit air inlet communicates with a part of the air inlet channel on the side close to the first cabinet body air inlet of the air duct switch; A first sensor, which is used to detect the temperature in the energy storage cabinet body; A second sensor, which is used to detect the particulate matter concentration in the environment where the energy storage system is located; A controller, which is electrically connected to the first sensor, the second sensor and the air duct switch, and the controller is used to control the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor; The controller is used to control the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor, including: if the temperature value detected by the first sensor is less than a second temperature threshold and the particulate matter concentration value detected by the second sensor is greater than a second particulate matter concentration threshold, then calculate the opening value of the air duct switch according to a preset corresponding relationship, the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor, wherein the preset corresponding relationship is used to represent the corresponding relationship between the opening value, the temperature value and the particulate matter concentration value; if the calculated value of the opening value of the air duct switch is less than a first preset opening value, then adjust the opening of the air duct switch to the first preset opening value; if the calculated value of the opening value of the air duct switch is greater than the first preset opening value and less than a second preset opening value, then adjust the opening of the air duct switch to the calculated value of the opening value of the air duct switch, wherein the second preset opening value is greater than the first preset opening value; if the calculated value of the opening value of the air duct switch is greater than the second preset opening value, then adjust the opening of the air duct switch to the second preset opening value.

2. The energy storage system according to claim 1, wherein The unit air inlet is located on the side of the air duct switch close to the first cabinet body air inlet.

3. The energy storage system according to claim 2, wherein, The first cabinet body air inlet and the unit air inlet are opposite in the air inlet direction of the first cabinet body air inlet.

4. The energy storage system according to claim 3, wherein From the end of the air duct switch close to the unit air inlet to the end close to the first cabinet body air inlet, the air duct switch is arranged to be gradually inclined towards the direction close to the second cabinet body air inlet.

5. The energy storage system according to claim 1, wherein The area of the first cabinet body air inlet is larger than the area of the second cabinet body air inlet.

6. The energy storage system according to claim 5, wherein The ratio between the area of the first cabinet body air inlet and the area of the second cabinet body air inlet is 1 to 3.

7. The energy storage system according to claim 6, wherein The ratio of the area of the air inlet of the first cabinet body to the area of the air inlet of the second cabinet body is 2.

8. The energy storage system according to claim 1, wherein, A second filtering device is arranged at the air inlet of the second cabinet body, and the filtering grade of the second filtering device is lower than that of the first filtering device.

9. The energy storage system according to claim 1, wherein The cooling unit has a first housing wall provided with the air inlet of the unit. The first housing wall and the cabinet wall of the energy storage cabinet body enclose to form the air inlet channel. The energy storage cabinet body has a first cabinet wall opposite to the first housing wall in the air inlet direction of the first cabinet body air inlet. The first cabinet wall is provided with the first cabinet body air inlet and the second cabinet body air inlet. The air duct switch is arranged between the first housing wall and the first cabinet wall.

10. The energy storage system according to claim 1, characterized in that, The air duct switch is an electric louver.

11. A control method for an energy storage system, which is used for the energy storage system as described in any one of claims 1-10, characterized in that, The control method of the energy storage system includes: Obtaining the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor; Controlling the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor; The controlling the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor includes: If the temperature value detected by the first sensor is less than the second temperature threshold and the particulate matter concentration value detected by the second sensor is greater than the second particulate matter concentration threshold, then calculate the opening value of the air duct switch according to the preset corresponding relationship, the temperature value detected by the first sensor, and the particulate matter concentration value detected by the second sensor, where the preset corresponding relationship is used to represent the corresponding relationship between the opening value, the temperature value, and the particulate matter concentration value; If the calculated value of the opening value of the air duct switch is less than the first preset opening value, then adjust the opening of the air duct switch to the first preset opening value; If the calculated value of the opening value of the air duct switch is greater than the first preset opening value and less than the second preset opening value, then adjust the opening of the air duct switch to the calculated value of the opening value of the air duct switch, where the second preset opening value is greater than the first preset opening value; If the calculated value of the opening value of the air duct switch is greater than the second preset opening value, then adjust the opening of the air duct switch to the second preset opening value.

12. The control method of the energy storage system according to claim 11, characterized in that, The controlling the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor includes: If the temperature value detected by the first sensor is greater than the first temperature threshold or the particulate matter concentration value detected by the second sensor is less than the first particulate matter concentration threshold, then control the air duct switch to open; If the temperature value detected by the first sensor is less than the first temperature threshold and the particulate matter concentration value detected by the second sensor is greater than the first particulate matter concentration threshold, then control the air duct switch to close.

13. The control method of the energy storage system according to claim 11, wherein The controlling the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor includes: Obtaining the operating parameters of the cooling unit; If the operating parameters of the cooling unit obtained indicate that the cooling unit is in the standby state, then control the air duct switch to close; If the operating parameters of the cooling unit obtained indicate that the cooling unit is in the working state, then control the opening and closing of the air duct switch according to the temperature value detected by the first sensor and the particulate matter concentration value detected by the second sensor.

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