Energy storage system and control method thereof

Abstract

The invention relates to the technical field of energy storage, and provides an energy storage system and a control method thereof.The energy storage system comprises an energy storage cabinet, a cooling unit, a first sensor, a second sensor and a controller, an air inlet channel is formed in the energy storage cabinet, and the energy storage cabinet is provided with a first cabinet air inlet and a second cabinet air inlet; a first filtering device is arranged at the air inlet of the first cabinet body; the air channel switches are arranged in the air inlet channel at intervals; the cooling unit is arranged in the energy storage cabinet body and is provided with a unit air inlet, and the unit air inlet is communicated with the part, close to the first cabinet body air inlet, of the air inlet channel; the first sensor is used for detecting the temperature in the energy storage cabinet body; the second sensor is used for detecting the particulate matter concentration of the environment where the energy storage system is located. And the controller is used for 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. The problem that a cooling unit is derated due to the fact that a filtering device is installed at an air inlet can be solved.

Description

Technical Field

[0001] The present disclosure relates to the field of energy storage technology, and in particular 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 to prevent overheating of the battery cells. The cooling unit is provided with an air inlet and an air outlet. The ambient air is sucked in from the air inlet as the cooling medium of the cooling unit for cooling. When the cooling unit is running, dust may enter the cooling unit or even the entire energy storage system. Therefore, when the energy storage system is installed in an area with low air quality, it is necessary to install filter cotton, filter nets and other filtering devices at the air inlet of the cooling unit. However, installing a filtering device will increase the wind resistance and may cause the cooling unit to be derated. Summary of the invention

[0003] The disclosed embodiments provide an energy storage system and a control method thereof, which are intended to solve the problem that installing a filter device at an air inlet of a cooling unit of the energy storage system may cause a derating of the cooling unit.

[0004] According to some embodiments of the present disclosure, an energy storage system is provided on one hand, including: An energy storage cabinet, wherein a battery module is arranged in the energy storage cabinet, 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 which are connected to the air inlet passage, and a first filter device is arranged at the first cabinet air inlet; An air duct switch, the air duct switch is arranged in the air inlet channel at intervals, and the air duct switch is located between the air inlet of the first cabinet and the air inlet of the second cabinet; A cooling unit, the cooling unit is arranged in the energy storage cabinet, the cooling unit is provided with an air inlet, the air inlet of the unit is connected to the part of the air inlet channel located on the side of the air duct switch close to the air inlet of the first cabinet; A first sensor, wherein the first sensor is used to detect the temperature inside the energy storage cabinet; A second sensor, the second sensor is used to detect the concentration of particulate matter in the environment where the energy storage system is located; A controller is electrically connected to the first sensor, the second sensor, and the air duct switch, and 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 particle concentration value detected by the second sensor.

[0005] In some embodiments, the air inlet of the unit is located on a side of the air duct switch close to the air inlet of the first cabinet.

[0006] In some embodiments, the first cabinet air inlet and the unit air inlet are opposite to each other in an air inlet direction of the first cabinet air inlet.

[0007] In some embodiments, from one end of the air duct switch close to the air inlet of the unit to the other end close to the air inlet of the first cabinet, the air duct switch is gradually inclined toward the direction close to the air inlet of the second cabinet.

[0008] 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.

[0009] In some embodiments, the ratio of the area of ​​the first cabinet air inlet to the area of ​​the second cabinet air inlet is 1-3.

[0010] In some embodiments, the ratio of the area of ​​the first cabinet air inlet to the area of ​​the second cabinet air inlet is 2.

[0011] In some embodiments, a second filter device is provided at the air inlet of the second cabinet, and the filtering level of the second filter device is lower than the filtering level of the first filter device.

[0012] In some embodiments, the cooling unit has a first casing wall with the unit air inlet, the first casing wall and the cabinet wall of the energy storage cabinet enclose the air inlet channel, the energy storage cabinet has a first cabinet wall opposite to the first casing wall in the air inlet direction of the first cabinet air inlet, the first cabinet wall is provided with the first cabinet air inlet and the second cabinet air inlet, and the air duct switch is arranged between the first casing wall and the first cabinet wall.

[0013] In some embodiments, the air duct switch is an electric blind.

[0014] According to some embodiments of the present disclosure, the embodiments of the present disclosure further provide a control method of an energy storage system, which is used for the above energy storage system. The control method of the energy storage system includes: Acquire a temperature value detected by the first sensor and a particle concentration value detected by the second sensor; The air duct switch is controlled according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

[0015] In some embodiments, controlling the air duct switch according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor includes: If the temperature value detected by the first sensor is greater than a first temperature threshold or the particle concentration value detected by the second sensor is less than a first particle concentration threshold, the air duct switch is controlled to be turned on; If the temperature value detected by the first sensor is less than the first temperature threshold and the particle concentration value detected by the second sensor is greater than the first particle concentration threshold, the air duct switch is controlled to be closed.

[0016] In some embodiments, controlling the air duct switch according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor includes: If the temperature value detected by the first sensor is less than a second temperature threshold and the particle concentration value detected by the second sensor is greater than a second particle concentration threshold, the opening value of the air duct switch is calculated according to a preset corresponding relationship, the temperature value detected by the first sensor, and the particle concentration value detected by the second sensor, wherein the preset corresponding relationship is used to characterize the corresponding relationship between the opening value, the temperature value, and the particle concentration value; If the calculated value of the opening value of the air duct switch is less than the first preset opening value, adjusting the opening value 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, adjusting 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, the opening of the air duct switch is adjusted to the second preset opening value.

[0017] In some embodiments, controlling the air duct switch according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor includes: Obtaining the operating parameters of the cooling unit; If the obtained operating parameters of the cooling unit indicate that the cooling unit is in a standby state, the air duct switch is controlled to be closed; If the acquired operating parameters of the cooling unit indicate that the cooling unit is in a working state, the air duct switch is controlled according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

[0018] The technical solution provided by the embodiments of the present disclosure has at least the following advantages: In the energy storage system provided by the embodiment of the present disclosure, two types of cabinet air inlets, namely a first cabinet air inlet and a second cabinet air inlet, are provided on the energy storage cabinet, and a first filter device is only provided at the first cabinet air inlet. When the air duct switch is turned on, the cooling unit is connected to the first cabinet air inlet and the second cabinet air inlet through the air inlet channel, so that the cooling unit simultaneously takes in air through the first cabinet air inlet and the second cabinet air inlet; when the air duct switch is turned off, the cooling unit is only connected to the first cabinet air inlet through the air inlet channel, so that the cooling unit only takes in air through the first cabinet air inlet provided with the first filter device; in this way, the controller can switch the air inlet mode of the cooling unit under different environmental conditions by controlling the switch of the air duct switch according to the temperature in the energy storage cabinet detected by the first sensor and the particle concentration in the environment of the energy storage system detected by the second sensor, thereby ensuring that the energy storage system can meet the dust prevention requirements under different environmental conditions while preventing the problem of cooling unit derating caused by providing the filter device at the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings, and these exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a partial structure of an energy storage system provided in the first embodiment of the present disclosure; Figure 2 for Figure 1 Schematic diagram of the structure of the wind channel switch; Figure 3 for Figure 2 A cross-sectional view of the mid-air duct switch; Figure 4 for Figure 1 A schematic diagram of the structure of the control part of the energy storage system; Figure 5 A schematic diagram of a partial structure of an energy storage system provided in the second embodiment of the present disclosure; Figure 6 A flow chart of a control method for an energy storage system provided in the first embodiment of the present disclosure; Figure 7 A flow chart of a control method for an energy storage system provided in accordance with the second embodiment of the present disclosure.

[0021] Description of the accompanying drawings in this disclosure: 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 shutter 4a, cooling unit 5, unit air inlet 51, first casing wall 52, first sensor 6a, second sensor 6b, controller 7. DETAILED DESCRIPTION

[0022] As can be seen from the background technology, 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 inhale ambient air from the air inlet to cool the cooling medium in the condenser of the cooling unit. Filtering devices such as filter cotton and filter nets are usually installed at the air inlet of the cooling unit, but the installation of filtering devices will increase the wind resistance, which may cause the cooling unit to be derated.

[0023] The disclosed embodiment provides an energy storage system and a control method thereof. 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 a first filter device is only provided at the first cabinet air inlet. When the air duct switch is turned on, the cooling unit is connected to the first cabinet air inlet and the second cabinet air inlet through the air inlet channel, so that the cooling unit simultaneously takes in air through the first cabinet air inlet and the second cabinet air inlet; when the air duct switch is turned off, the cooling unit is only connected to the first cabinet air inlet through the air inlet channel, so that the cooling unit takes in air only through the first cabinet air inlet provided with the first filter device; in this way, the controller can switch the air inlet mode of the cooling unit under different environmental conditions by controlling the switch of the air duct switch according to the temperature in the energy storage cabinet detected by the first sensor and the concentration of particulate matter in the environment where the energy storage system is located detected by the second sensor, thereby ensuring that the energy storage system can meet the dust prevention requirements under different environmental conditions, and preventing the problem of cooling unit derating caused by the filter device provided at the air inlet.

[0024] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined. Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which 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, and therefore cannot be understood as a limitation on the embodiments of the present application. For example, if the device or element in the figure is inverted, then the element described as being "below" or "below" or "below" or "bottom" of other elements or features will be oriented "above" or "top" of the other elements or features. Therefore, the term "below" may cover both the above and below orientations depending on the context in which the term is used, which will be obvious to a person of ordinary skill in the art. The material may be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatially relative descriptors used herein may be interpreted accordingly.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. 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 the specific circumstances.

[0029] In the accompanying drawings corresponding to the embodiments of the present application, the thickness and area of ​​the layers are exaggerated for better understanding and ease of description. 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 is it formed on a partial edge of the entire surface.

[0030] 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 be further included. A second component is formed or provided above or on the first component, or a second component is formed or provided on the surface of the first component, or a second component is formed or provided on one side of the first component, which may include an embodiment in which the first component and the second component are in direct contact, and may also include an embodiment in which an additional component may be provided between the first component and the second component, so that the first component and the second component may not be in direct contact. For the sake of simplicity and clarity, various components may be drawn arbitrarily in different proportions. In the accompanying drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, a second component is formed or provided on the surface of the first component, which means that the first component is in direct contact with the second component. Among them, the above-mentioned "component" may refer to a layer, a film, an area, a part, a structure, etc.

[0031] The terms used in the description of the various embodiments described herein are only used to describe specific embodiments and are not intended to be limiting. As used in the description of the various embodiments described and in the appended claims, "the components" are also intended to include plural forms unless the context clearly indicates otherwise. Among them, components include components such as layers, films, regions, or plates.

[0032] The following will describe the various embodiments of the present disclosure in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present disclosure, many technical details are provided in order to enable 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 be implemented.

[0033] Figures 1 to 5 A schematic diagram of the structure of an energy storage system provided in various embodiments of the present disclosure.

[0034] refer to Figures 1 to 5In 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 arranged in the energy storage cabinet 1. An air inlet channel 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 connected to the air inlet channel 2. A first filter device (not shown in the figure) is arranged at the first cabinet air inlet 3a. The air duct switch 4 is arranged in the air inlet channel 2 at intervals. The air duct switch 4 is located at the first cabinet air inlet 3a and the second cabinet air inlet 3b. The cooling unit 5 is arranged in the energy storage cabinet 1, and the cooling unit 5 is provided with an organic air inlet 51, and the organic air inlet 51 is connected to the part of the air inlet channel 2 located 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 in the energy storage cabinet 1; the second sensor 6b is used to detect the particle concentration of the environment in which 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 switch of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particle concentration value detected by the second sensor 6b.

[0035] Specifically, the energy storage system 100 includes an energy storage cabinet 1, which is used to isolate the internal electrical components and other components of the energy storage system 100 from the external environment. A cooling unit 5 and a battery module are arranged in the energy storage cabinet 1. The cooling unit 5 can be an air-cooled unit or a liquid-cooled unit, etc. The cooling unit 5 can prevent the battery module from overheating. The following will take the energy storage system 100 as an immersion energy storage system and the cooling unit 5 as 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 prevent the battery cell from overheating.

[0036] The cooling unit 5 includes a casing, which is provided with an organic unit air inlet 51 and an organic unit air outlet. An organic unit fan is arranged in the casing. When the unit fan is running, air can be sucked into the cooling unit 5 from the unit air inlet 51, and discharged from the unit air outlet after taking away the heat. An air inlet channel 2 is formed in the internal interval of the energy storage cabinet 1, and a first cabinet air inlet 3a and a second cabinet air inlet 3b are arranged on the cabinet wall of the energy storage cabinet 1 corresponding to the air inlet channel 2. The first cabinet air inlet 3a and the second cabinet air inlet 3b are both connected to the air inlet channel 2. An air duct switch 4 is arranged in the air inlet channel 2 corresponding to the first cabinet air inlet 3a and the second cabinet air inlet 3b. The air duct switch 4 is located between the first cabinet air inlet 3a and the second cabinet air inlet 3b, so that the air inlet channel 2 is divided into a first air inlet section 21 connected to the first cabinet air inlet 3a, and a second air inlet section 22 connected to the second cabinet air inlet 3b through the air duct switch 4. When the air duct switch 4 is turned on, the first air inlet section 21 is connected to the second air inlet section 22; and when the air duct switch 4 is turned off, the first air inlet section 21 is not connected to the second air inlet section 22. The shape of the air duct switch 4 is adapted to the shape of the air inlet channel 2, and the air duct switch 4 can be a damper or an electric blind 4a. Figures 1 to 3 In some embodiments, the air duct switch 4 is an electric blind 4a. The configuration of the air duct switch 4 is relatively simple. The following will take the air duct switch 4 as an electric blind 4a as an example for introduction.

[0037] A first filter device is provided at the first cabinet air inlet 3a, so that the first filter device can filter the air entering the air inlet channel 2 from the first cabinet air inlet 3a. The first filter device can be made of a filter material such as non-woven fabric, filter cotton, etc. that can filter tiny particles in the air. The first filter device can be fixedly installed on the inside or outside of the first cabinet air inlet 3a by screw fixing or structural adhesive fixing.

[0038] The wind resistance of the second cabinet air inlet 3b is smaller than that of the first cabinet air inlet 3a, and the second cabinet air inlet 3b may not be provided with a filter device; the second cabinet air inlet 3b may also be provided with a filter device with a filter level lower than that of the first filter device. Optionally, in some embodiments, a second filter device is provided at the second cabinet air inlet 3b, and the filter level of the second filter device is lower than that of the first filter device. The second cabinet air inlet 3b may be provided with a second filter device with a filter level lower than that of the first filter device according to the air quality of the local environment where the energy storage system 100 is located, so that the second filter device can filter the air entering the air inlet channel 2 from the second cabinet air inlet 3b, and because the filter level of the second filter device is lower than that of the first filter device, the wind resistance of the second filter device is also lower than that of the first filter device, and the derating of the cooling unit 5 caused by the second filter device is lower than that caused by the first filter device. The following will be described as an example where the second cabinet air inlet 3b is not provided with a filter device.

[0039] The part of the air inlet channel 2 located on the side of the air duct switch 4 close to the first cabinet air inlet 3a is the first air inlet section 21, and the part of the air inlet channel 2 located on the side of the air duct switch 4 close to the second cabinet air inlet 3b is the second air inlet section 22. Then the unit air inlet 51 is connected to the part of the air inlet channel 2 located on the side of the air duct switch 4 close to the first cabinet air inlet 3a, that is, the unit air inlet 51 is connected to the first air inlet section 21. When the air duct switch 4 is turned on, 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 unit air inlet 51 through the first air inlet section 21, so that the unit air inlet 51 is connected to the first cabinet air inlet 3a and the second cabinet air inlet 3b through the air inlet channel 2. At this time, the cooling unit 5 can be simultaneously inlet through the first cabinet air inlet 3a and the second cabinet air inlet 3b with smaller wind resistance, thereby reducing the derating of the cooling unit 5 caused by the wind resistance of the cabinet air inlet. When the air duct switch 4 is turned off, 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 unit air inlet 51, so that the unit air inlet 51 is only connected to the first cabinet air inlet 3a but not to the second cabinet air inlet 3b. At this time, the cooling unit 5 can only take in air through the first cabinet air inlet 3a provided with the first filtering device, so that the air entering the energy storage system 100 will be filtered by the first filtering device, ensuring that the energy storage system 100 can meet the dust prevention requirements under different environmental conditions.

[0040] As described above, by controlling the switch 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 turned on, and the cooling unit 5 takes in air through the first cabinet air inlet 3a and the second cabinet air inlet 3b at the same time; when the cooling unit 5 is in the second air intake mode, the air duct switch 4 is turned off, and the cooling unit 5 only takes in air through the first cabinet air inlet 3a.

[0041] The energy storage system 100 is provided with a first sensor 6a, which is a temperature sensor. The temperature in the energy storage cabinet 1 can be detected in real time or periodically through the first sensor 6a. The specific setting position of the first sensor 6a on the energy storage system 100 can be set according to actual conditions. For example, the first sensor 6a is set in the energy storage cabinet 1 corresponding to the battery module, so that the temperature of the battery module is detected by the first sensor 6a. The first sensor 6a is used to detect the temperature of the battery module as an example. 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.

[0042] The energy storage system 100 is provided with a second sensor 6b, which is a particle concentration sensor. The second sensor 6b can detect the particle concentration of the environment in which the energy storage system 100 is located in real time or periodically. The specific setting position of the second sensor 6b can be set according to the actual situation. The second sensor 6b can be set on the energy storage cabinet 1; the second sensor 6b can also be set at any position in the environment in which the energy storage system 100 is located. For example, the second sensor 6b can be set on the energy storage cabinet 1, and the second sensor 6b is located at the air inlet 3a of the first cabinet or the air inlet 3b of the second cabinet. The second sensor 6b is electrically connected to the controller 7, so that the second sensor 6b can send the detected particle concentration value to the controller 7. Among them, the particle concentration detected by the second sensor 6b can be PM2.5 or PM10, etc., and the particle concentration detected by the second sensor 6b is PM10 as an example for introduction.

[0043] The controller 7 is electrically connected to the air duct switch 4, and the switch of the air duct switch 4 can be controlled by the controller 7. The controller 7 can be the original battery management system of the energy storage system 100, or the controller 7 can be a newly added control device. The following will take the controller 7 as the battery management system of the energy storage system 100 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 the monitoring of various key data in the energy storage system 100.

[0044] The controller 7 has a thermal management strategy pre-stored therein, and the controller 7 is electrically connected to the cooling unit 5, so that the controller 7 can control the start and stop of the cooling unit 5 according to the thermal management strategy. The controller 7 can control the switch of the air duct switch 4 based on the thermal management strategy and according to the temperature value detected by the first sensor 6a and the particle concentration value detected by the second sensor 6b to switch the air intake mode of the cooling unit 5. For example, when the content of small-size particles in the environment where the energy storage system 100 is located is high, that is, the particle concentration value detected by the second sensor 6b is greater than the preset particle 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 takes in air through the first cabinet air inlet 3a provided with the first filter device; when the content of small-size particles in the environment where the energy storage system 100 is located is low, that is, the particle concentration value detected by the second sensor 6b is less than the preset particle 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 simultaneously takes in air through the first cabinet air inlet 3a and the second cabinet air inlet 3b with smaller wind resistance. In this way, the air intake mode of the cooling unit 5 can be switched under different environmental conditions to ensure that the energy storage system 100 can work under different environmental conditions.

[0045] The energy storage cabinet 1 is provided with two cabinet air inlets, namely a first cabinet air inlet 3a and a second cabinet air inlet 3b, and a first filtering device is only provided at the first cabinet air inlet 3a. When the air duct switch 4 is turned on, the cooling unit 5 is connected to the first cabinet air inlet 3a and the second cabinet air inlet 3b through the air inlet channel 2, so that the cooling unit 5 simultaneously takes in air through the first cabinet air inlet 3a and the second cabinet air inlet 3b; when the air duct switch 4 is turned off, the cooling unit 5 is only connected to the first cabinet air inlet 3a through the air inlet channel 2, so that the cooling unit 5 only takes in air through the first cabinet air inlet 3a. Air is introduced through the first cabinet air inlet 3a provided with a first filtering device; in this way, the controller 7 can switch the air intake mode of the cooling unit 5 under different environmental conditions by controlling the switch of the air duct switch 4 according to the temperature in the energy storage cabinet 1 detected by the first sensor 6a and the concentration of particulate matter in the environment of the energy storage system 100 detected by the second sensor 6b, thereby ensuring that the energy storage system 100 can meet the dust prevention requirements under different environmental conditions while preventing the problem of cooling unit 5 being derated due to the setting of a filtering device at the air inlet.

[0046] The embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0047] The air inlet direction of the air inlet (the first cabinet air inlet 3a, the second cabinet air inlet 3b or the unit air inlet 51, etc.) is a direction perpendicular to the plane where the air inlet is located. The air inlet direction of the first cabinet air inlet 3a and the air inlet direction of 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 direction of the first cabinet air inlet 3a and the air inlet direction of the unit air inlet 51 may be the same or different.

[0048] Optionally, refer to Figure 1 and Figure 5 In some embodiments, the cooling unit 5 has a first casing wall 52 with a unit air inlet 51, and the energy storage cabinet 1 has a first cabinet wall 11 opposite to the first casing wall 52 in the air inlet direction of the first cabinet air inlet 3a, and the first cabinet wall 11 is provided with a first cabinet air inlet 3a and a second cabinet air inlet 3b.

[0049] Specifically, the air inlet directions of 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 conducive to reducing the wind resistance in 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. The first cabinet air inlet 3a and the second cabinet air inlet 3b are both located on the first cabinet wall 11 of the energy storage cabinet 1. The first cabinet air inlet 3a can be located on the upper side, lower side or one side of the horizontal direction of the second cabinet air inlet 3b. The following will be introduced by taking the first cabinet air inlet 3a and the second cabinet air inlet 3b as an example in which both the first cabinet air inlet 3a and the second cabinet air inlet 3b are opened on the first cabinet wall 11, and the first cabinet air inlet 3a is located on the upper side of the second cabinet air inlet 3b.

[0050] Optionally, refer to Figure 1 and Figure 5 In some embodiments, a protective net 31 is provided at the first cabinet air inlet 3a and the second cabinet air inlet 3b. In this way, the protective net 31 is installed at the first cabinet air inlet 3a and the second cabinet air inlet 3b, and the protective net 31 can prevent large debris from passing through the first cabinet air inlet 3a and the second cabinet air inlet 3b and entering the air inlet channel 2. Similarly, the protective net 31 may not be provided at the unit air inlet 51; the protective net 31 may also be provided at the unit air inlet 51. When the protective net 31 is provided at the unit air inlet 51, the protective net 31 can prevent large debris from passing through the unit air inlet 51 and entering the cooling unit 5.

[0051] Optionally, refer to Figure 1 and Figure 5In some embodiments, the unit air inlet 51 is located on the side of the air duct switch 4 close to the first cabinet air inlet 3a. In this way, the unit air inlet 51 is located on the upper side of the air duct switch 4, which is conducive to the unit air inlet 51 being directly connected to the first air inlet section 21 and the unit air inlet 51 being staggered with the second air inlet section 22.

[0052] The first cabinet air inlet 3a and the unit air inlet 51 are both located on the upper side of the second cabinet air inlet 3b. The first cabinet air inlet 3a and the unit air inlet 51 can be arranged directly opposite to each other; the first cabinet air inlet 3a and the unit air inlet 51 can also be arranged staggered. Figure 1 and Figure 5 In some embodiments, the first cabinet air inlet 3a and the unit air inlet 51 are opposite to each other in the air inlet direction of the first cabinet air inlet 3a. The first cabinet air inlet 3a and the unit air inlet 51 are arranged opposite to each other in the air inlet direction of the first cabinet air inlet 3a, which is conducive to reducing the wind resistance in the process of air flowing from the first cabinet air inlet 3a to the unit air inlet 51.

[0053] The area of ​​the first cabinet air inlet 3a and the area of ​​the second cabinet air inlet 3b may be equal or unequal. Figure 1 and Figure 5 In some embodiments, the area of ​​the first cabinet air inlet 3a is larger than the area of ​​the second cabinet air inlet 3b. The sum of the areas of the first cabinet air inlet 3a and the second cabinet air inlet 3b is related to the area of ​​the first casing wall 52. When the cooling unit 5 is in the first air inlet mode and the second air inlet mode, the cooling unit 5 needs to take in air through the first cabinet air inlet 3a, and the wind resistance of the first cabinet air inlet 3a is greater than the wind resistance of the second cabinet air inlet 3b. Setting the area of ​​the first cabinet air inlet 3a larger than the area of ​​the second cabinet air inlet 3b is conducive to ensuring that the cooling unit 5 has sufficient air volume for cooling.

[0054] Optionally, in some embodiments, the ratio between the area of ​​the first cabinet air inlet 3a and the area of ​​the second cabinet air inlet 3b is 1-3.

[0055] Specifically, the area of ​​the first cabinet air inlet 3a is N times the area of ​​the second cabinet air inlet 3b, and 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 conducive to ensuring that the cooling unit 5 has sufficient air volume for cooling. Further, the ratio between the area of ​​the first cabinet air inlet 3a and the area of ​​the second cabinet air inlet 3b is 2.

[0056] The area of ​​the first cabinet air inlet 3a and the area of ​​the unit air inlet 51 may be equal or unequal. Figure 1 and Figure 5 In some embodiments, the area of ​​the first cabinet air inlet 3a is larger than the area of ​​the unit air inlet 51, which is also helpful to ensure that the cooling unit 5 has sufficient air volume for cooling.

[0057] The area of ​​the second cabinet air inlet 3b may be equal to or different from the area of ​​the unit air inlet 51. Figure 1 and Figure 5 In some embodiments, the area of ​​the unit air inlet 51 is larger than the area of ​​the second cabinet air inlet 3b, which is also helpful to ensure that the cooling unit 5 has sufficient air volume for cooling.

[0058] 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 gradually tilted toward the direction close to the second cabinet air inlet 3b. The air duct switch 4 is gradually tilted downward in the direction from the unit air inlet 51 to the first cabinet air inlet 3a, which is conducive to achieving 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.

[0059] Optionally, refer to Figure 1 and Figure 5 In some embodiments, the first casing wall 52 and the cabinet wall of the energy storage cabinet 1 are enclosed to form an air inlet channel 2, the first cabinet wall 11 of the energy storage cabinet 1 and the first casing wall 52 are opposite to each other in the air inlet direction of the first cabinet air inlet 3a, and the air duct switch 4 is arranged between the first casing wall 52 and the first cabinet wall 11.

[0060] 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 circulation 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 with the second air inlet section 22.

[0061] Optionally, refer 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 at the lower side of 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 provided in the energy storage cabinet 1 and at the lower side of 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 at the lower side of the cooling unit 5.

[0062] There are many specific implementations of the controller 7 controlling the switch of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particle 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 particle concentration value detected by the second sensor 6b is less than the first particle 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 particle concentration value detected by the second sensor 6b is greater than the first particle concentration threshold, the controller 7 controls the air duct switch 4 to close.

[0063] Specifically, the temperature value detected by the first sensor 6a is T, the first temperature threshold is T1, the particle concentration value detected by the second sensor 6b is P, and the first particle concentration threshold is P1.

[0064] After the controller 7 obtains the temperature value T detected by the first sensor 6a and the particle concentration value P detected by the second sensor 6b, the controller 7 can first determine the magnitude relationship between the particle concentration value P detected by the second sensor 6b and the first particle concentration threshold value 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 value 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.

[0065] After the controller 7 obtains the temperature value T detected by the first sensor 6a and the particle concentration value P detected by the second sensor 6b, the controller 7 may also first determine the magnitude relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold value 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 particle concentration value P detected by the second sensor 6b and the first particle concentration threshold value 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.

[0066] 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 be closed; if the cooling unit 5 is in a working state, the controller 7 determines the relationship between the particle concentration value P detected by the second sensor 6b and the first particle concentration threshold value P1, or determines the relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold value T1.

[0067] Specifically, the controller 7 will first determine whether the cooling unit 5 is in working state. There is no risk of derating when the cooling unit 5 is in non-working state (or standby state), so the controller 7 controls the air duct switch 4 to be closed to ensure that external dust does not enter the energy storage system 100.

[0068] Optionally, in some embodiments, if the temperature value detected by the first sensor 6a is less than the second temperature threshold and the particle concentration value detected by the second sensor 6b is greater than the second particle concentration threshold, the opening value of the duct switch 4 is calculated according to the preset corresponding relationship, the temperature value detected by the first sensor 6a, and the particle concentration value detected by the second sensor 6b; if the calculated value of the opening value of the duct switch 4 is less than the first preset opening value, the opening of the duct switch 4 is adjusted to the first preset opening value; if the calculated value of the opening value of the duct switch 4 is greater than the first preset opening value and less than the second preset opening value, the opening of the duct switch 4 is adjusted to the calculated value of the opening value of the duct switch 4; if the calculated value of the opening value of the duct switch 4 is greater than the second preset opening value, the opening of the duct switch 4 is adjusted to the second preset opening value.

[0069] Specifically, the second temperature threshold is T2, the second particle 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 particle concentration value P, and the preset corresponding relationship can correspond to a table or a formula.

[0070] If T<T2, the controller 7 controls the air duct switch 4 to be closed. If T>T2 and P<P2, the controller 7 controls the air duct switch 4 to be opened, that is, the opening of the air duct switch 4 is adjusted to 1. If T>T2 and P>P2, the controller 7 calculates the opening value of the air duct switch 4 according to the preset corresponding relationship between T, P, and obtains 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.

[0071] 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 control method for an energy storage system provided in another embodiment of the present disclosure will be described in detail below in conjunction with the accompanying drawings. For the parts that are the same or corresponding to the previous embodiment, reference can be made to the corresponding description of the above embodiment, and will not be described in detail below.

[0072] Figure 6 A flow chart of a control method for an energy storage system provided in one embodiment of the present disclosure.

[0073] refer to Figure 6 In some embodiments, the control method of the energy storage system includes the following steps: Step S610: Acquire the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

[0074] Specifically, the first sensor 6a detects the temperature T in the energy storage cabinet 1 in real time, and the second sensor 6b detects the particle concentration P in the environment of the energy storage system 100 in real time. The controller 7 can obtain the temperature value T detected by the first sensor 6a and the particle concentration value P detected by the second sensor 6b.

[0075] Step S620: Controlling the air duct switch according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

[0076] Specifically, after the controller 7 obtains the temperature value T detected by the first sensor 6a and the particle concentration value P detected by the second sensor 6b, the controller 7 can control the switch of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particle concentration value detected by the second sensor 6b.

[0077] For example, when the content of small-size particles in the environment where the energy storage system 100 is located is relatively high, that is, the particle concentration value detected by the second sensor 6b is greater than the preset particle concentration threshold, the controller 7 controls the air duct switch 4 to be closed, and switches the cooling unit 5 to the second air intake mode, so that the cooling unit 5 only takes in air through the first cabinet air inlet 3a provided with the first filter device; when the content of small-size particles in the environment where the energy storage system 100 is located is relatively low, that is, the particle concentration value detected by the second sensor 6b is less than the preset particle concentration threshold, the controller 7 controls the air duct switch 4 to be opened, and switches the cooling unit 5 to the first air intake mode, so that the cooling unit 5 takes in air through both the first cabinet air inlet 3a and the second cabinet air inlet 3b with smaller wind resistance.

[0078] 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 particle concentration value detected by the second sensor 6b is less than the first particle concentration threshold, then the air duct switch 4 is controlled to be opened; if the temperature value detected by the first sensor 6a is less than the first temperature threshold and the particle concentration value detected by the second sensor 6b is greater than the first particle concentration threshold, then the air duct switch 4 is controlled to be closed.

[0079] Specifically, after the controller 7 obtains the temperature value T detected by the first sensor 6a and the particle concentration value P detected by the second sensor 6b, the controller 7 can first determine the relationship between the particle concentration value P detected by the second sensor 6b and the first particle concentration threshold value P1. If P<P1, the controller 7 controls the air duct switch 4 to open; if P>P1, the controller 7 then determines the relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold value 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. In some embodiments, P1 is 200μg / m 3 ~400 μg / m 3 , T1 is 30℃~50℃, for example, P1 can be 200μg / m 3 , 210μg / m 3 , 220μg / m 3 , 230μg / m 3 , 240 μg / m 3 , 250 μg / m 3 , 260μg / m 3 , 270 μg / m 3 , 280 μg / m 3 , 290μg / m 3 , 300 μg / m 3 , 310μg / m 3 , 320μg / m 3 330μg / m 3 340 μg / m 3 , 350μg / m 3 360μg / m 3 370 μg / m 3 380 μg / m 3 390 μg / m 3 or 400 μg / m 3etc. And 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.

[0080] After the controller 7 obtains the temperature value T detected by the first sensor 6a and the particle concentration value P detected by the second sensor 6b, the controller 7 may also first determine the magnitude relationship between the temperature value T detected by the first sensor 6a and the first temperature threshold value 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 particle concentration value P detected by the second sensor 6b and the first particle concentration threshold value 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.

[0081] 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 particle concentration value detected by the second sensor 6b is greater than the second particle concentration threshold, then the opening value of the duct switch 4 is calculated according to the preset corresponding relationship, the temperature value detected by the first sensor 6a, and the particle concentration value detected by the second sensor 6b; if the calculated value of the opening value of the duct switch 4 is less than the first preset opening value, the opening of the duct switch 4 is adjusted to the first preset opening value; if the calculated value of the opening value of the duct switch 4 is greater than the first preset opening value and less than the second preset opening value, the opening of the duct switch 4 is adjusted to the calculated value of the opening value of the duct switch 4; if the calculated value of the opening value of the duct switch 4 is greater than the second preset opening value, the opening of the duct switch 4 is adjusted to the second preset opening value, wherein the second preset opening value is greater than the first preset opening value.

[0082] If T<T2, the controller 7 controls the air duct switch 4 to be closed. If T>T2 and P<P2, the controller 7 controls the air duct switch 4 to be opened, that is, the opening of the air duct switch 4 is adjusted 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 corresponding relationship. 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.

[0083] Optionally, in some embodiments, step S620 includes: obtaining 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 a standby state, controlling the air duct switch 4 to be closed; if the obtained operating parameters of the cooling unit 5 indicate that the cooling unit 5 is in a working state, controlling the switch of the air duct switch 4 according to the temperature value detected by the first sensor 6a and the particle concentration value detected by the second sensor 6b.

[0084] Specifically, the controller 7 will first determine whether the cooling unit 5 is in working state. There is no risk of derating when the cooling unit 5 is in non-working state (or standby state), so the controller 7 controls the air duct switch 4 to be closed to ensure that external dust does not enter the energy storage system 100.

[0085] Figure 7 A flow chart of a control method for an energy storage system provided in one embodiment of the present disclosure.

[0086] refer to Figure 7 In some embodiments, the control method of the energy storage system includes the following steps: Step 1: Obtain the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

[0087] Step 2: Determine whether the cooling unit is in working condition.

[0088] Specifically, it is determined whether the fan of the cooling unit 5 is in working state. When the fan is not in working state, there is no risk of derating of 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 yes, the third step is executed; if not, the fifth step is executed.

[0089] Step 3: Determine whether the particle concentration value detected by the second sensor is greater than the first particle concentration threshold.

[0090] Specifically, if yes, it means that the content of small-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 no, then the fourth step is executed.

[0091] Step 4: Determine whether the temperature value detected by the first sensor is greater than the first temperature threshold.

[0092] Specifically, if yes, it means that the energy storage system 100 has a risk of over-temperature, and then the sixth step is executed to give priority to ensuring the refrigeration capacity of the cooling unit 5. If no, then the fifth step is executed.

[0093] Step 5: Control the air duct switch 4 to close.

[0094] Step 6: Control the air duct switch 4 to open.

[0095] In some embodiments, the control method of the energy storage system includes the following steps: Step 1: Obtain the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

[0096] Step 2: Determine whether the temperature value detected by the first sensor is greater than a third temperature threshold.

[0097] Specifically, if not, the third step is executed; if yes, it means that the energy storage system 100 has a risk of over-temperature, and the air duct switch 4 is controlled to be opened, that is, the opening of the air duct switch 4 is adjusted to 1, and the refrigeration capacity of the cooling unit 5 is prioritized. The third temperature threshold is T3, T3>T2, wherein, in some embodiments, T3 is 40℃~60℃, and T3 can be 40℃, 41℃, 42℃, 43℃, 44℃, 45℃, 46℃, 47℃, 48℃, 49℃, 50℃, 51℃, 52℃, 53℃, 54℃, 55℃, 56℃, 57℃, 58℃, 59℃ or 60℃, etc.

[0098] Step 3: 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 particle concentration value detected by the second sensor.

[0099] Specifically, in some embodiments, the preset corresponding relationship is F=F1+(T-T2) / (T3-T2)+(P2-P) / 2P2.

[0100] In some embodiments, F1 is 0.4-0.6, and F2 is 0.8-1. 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, and 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.

[0101] In some embodiments, P2 is 200 μg / m 3 ~400 μg / m 3 , T2 is 30℃~50℃, for example, P2 can be 200μg / m 3 , 210μg / m 3 , 220μg / m 3 , 230μg / m 3 , 240 μg / m 3, 250 μg / m 3 , 260μg / m 3 , 270 μg / m 3 , 280 μg / m 3 , 290μg / m 3 , 300 μg / m 3 , 310μg / m 3 , 320μg / m 3 330μg / m 3 340 μg / m 3 , 350μg / m 3 360μg / 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.

[0102] In some embodiments, F1=0.5, F2=1, T2=35, T3=45, P2=300, and F=0.5+(T-35) / 10+(300-P) / 600.

[0103] Step 4: Determine whether the calculated value of the opening value of the air duct switch is greater than the first preset opening value.

[0104] Specifically, if yes, execute step 5; if no, execute step 6.

[0105] Step 5: Determine whether the calculated value of the opening value of the air duct switch is greater than the second preset opening value.

[0106] Specifically, if yes, execute step 7; if no, adjust the opening of the air duct switch to the calculated opening value or the second preset opening value.

[0107] Step 6: Adjust the opening of the air duct switch to a first preset opening value.

[0108] Step 7: Adjust the opening of the air duct switch to the second preset opening value.

[0109] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for realizing the present disclosure, and in practical applications, various changes can be made to them 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, so the protection scope of the present disclosure shall be based on the scope defined in the claims.

Claims

1. An energy storage system, characterized in that: include: An energy storage cabinet, wherein a battery module is arranged in the energy storage cabinet, 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 which are connected to the air inlet passage, and a first filter device is arranged at the first cabinet air inlet; An air duct switch, the air duct switch is arranged in the air inlet channel at intervals, and the air duct switch is located between the air inlet of the first cabinet and the air inlet of the second cabinet; A cooling unit, the cooling unit is arranged in the energy storage cabinet, the cooling unit is provided with an air inlet, the air inlet of the unit is connected to the part of the air inlet channel located on the side of the air duct switch close to the air inlet of the first cabinet; A first sensor, wherein the first sensor is used to detect the temperature inside the energy storage cabinet; A second sensor, the second sensor is used to detect the concentration of particulate matter in the environment where the energy storage system is located; A controller is electrically connected to the first sensor, the second sensor, and the air duct switch, and 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 particle concentration value detected by the second sensor.

2. The energy storage system according to claim 1, characterized in that: The air inlet of the unit is located on a side of the air duct switch close to the air inlet of the first cabinet.

3. The energy storage system according to claim 2, characterized in that: The first cabinet air inlet and the unit air inlet are opposite to each other in an air inlet direction of the first cabinet air inlet.

4. The energy storage system according to claim 3, characterized in that: From one end of the air duct switch close to the air inlet of the unit to the other end close to the air inlet of the first cabinet, the air duct switch is gradually inclined toward the direction close to the air inlet of the second cabinet.

5. The energy storage system according to claim 1, characterized in that: The area of ​​the air inlet of the first cabinet is larger than the area of ​​the air inlet of the second cabinet.

6. The energy storage system according to claim 5, characterized in that: The ratio of the area of ​​the air inlet of the first cabinet to the area of ​​the air inlet of the second cabinet is 1-3.

7. The energy storage system according to claim 6, characterized in that: The ratio of the area of ​​the air inlet of the first cabinet to the area of ​​the air inlet of the second cabinet is 2.

8. The energy storage system according to claim 1, characterized in that: A second filter device is disposed at the air inlet of the second cabinet, and the filtering level of the second filter device is lower than the filtering level of the first filter device.

9. The energy storage system according to claim 1, characterized in that: The cooling unit has a first casing wall with an air inlet for the unit, the first casing wall and the cabinet wall of the energy storage cabinet enclose the air inlet passage, the energy storage cabinet has a first cabinet wall opposite to the first casing wall in the air inlet direction of the first cabinet air inlet, the first cabinet wall is provided with the first cabinet air inlet and the second cabinet air inlet, and the air duct switch is arranged between the first casing 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 shutter.

11. A control method for an energy storage system, used in the energy storage system according to any one of claims 1 to 10, characterized in that: The control method of the energy storage system comprises: Acquire a temperature value detected by the first sensor and a particle concentration value detected by the second sensor; The air duct switch is controlled according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

12. The control method of the energy storage system according to claim 11, characterized in that: The method of controlling the air duct switch according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor includes: If the temperature value detected by the first sensor is greater than a first temperature threshold or the particle concentration value detected by the second sensor is less than a first particle concentration threshold, the air duct switch is controlled to be turned on; If the temperature value detected by the first sensor is less than the first temperature threshold and the particle concentration value detected by the second sensor is greater than the first particle concentration threshold, the air duct switch is controlled to be closed.

13. The control method of the energy storage system according to claim 11, characterized in that: The method of controlling the air duct switch according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor includes: If the temperature value detected by the first sensor is less than a second temperature threshold and the particle concentration value detected by the second sensor is greater than a second particle concentration threshold, the opening value of the air duct switch is calculated according to a preset corresponding relationship, the temperature value detected by the first sensor, and the particle concentration value detected by the second sensor, wherein the preset corresponding relationship is used to characterize the corresponding relationship between the opening value, the temperature value, and the particle concentration value; If the calculated value of the opening value of the air duct switch is less than the first preset opening value, adjusting the opening value 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, adjusting 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, the opening of the air duct switch is adjusted to the second preset opening value.

14. The control method of the energy storage system according to claim 11, characterized in that: The method of controlling the air duct switch according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor includes: Obtaining the operating parameters of the cooling unit; If the obtained operating parameters of the cooling unit indicate that the cooling unit is in a standby state, the air duct switch is controlled to be closed; If the acquired operating parameters of the cooling unit indicate that the cooling unit is in a working state, the air duct switch is controlled according to the temperature value detected by the first sensor and the particle concentration value detected by the second sensor.

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