Energy storage cabinet and energy storage system

Abstract

The invention provides an energy storage cabinet and an energy storage system. The energy storage cabinet comprises a cabinet body, a plurality of battery packs, an explosion venting cover, a sensor, a trigger part and a controller. Specifically, the battery pack is accommodated in the cabinet body. The cabinet body comprises a cabinet plate, and the cabinet plate is provided with an explosion venting port. The explosion venting cover is located outside the cabinet body and covers the explosion venting opening. The sensor is arranged in the cabinet body and used for obtaining explosion venting parameters in the cabinet body. The explosion venting parameters comprise at least one of the temperature in the cabinet body, the combustible gas concentration in the cabinet body, the smoke concentration in the cabinet body, the total voltage of the battery pack, the cell temperature of the battery pack and the cell voltage of the battery pack. The trigger part is provided with an explosion venting cover. The controller is electrically connected with the sensor and used for receiving the explosion venting parameters and controlling the triggering component to drive the explosion venting cover to be opened according to the explosion venting parameters. The sensor of the energy storage cabinet can obtain the explosion venting parameters in the cabinet body, and when the condition of explosion venting in advance is met, the controller can control the explosion venting cover to conduct explosion venting in advance, so that the explosion risk is reduced, and the safety of the energy storage system is improved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly to an energy storage cabinet and an energy storage system. Background Art

[0002] In an energy storage system, energy storage batteries are usually placed in an energy storage cabinet. During the thermal runaway of the battery, chemical and physical reactions occur to the electrolyte, positive and negative electrode materials, separator, etc. inside the battery, generating a large amount of combustible gas and releasing it into the energy storage cabinet. When the combustible gas encounters a spark or high temperature, an explosion will occur, and the shock wave and thermal radiation generated by the explosion will pose a threat to the surroundings of the cabinet. Therefore, existing energy storage cabinets are usually equipped with explosion relief doors or explosion relief windows to release the shock wave and flame generated by the explosion, avoiding the energy storage cabinet from bearing a large explosion pressure.

[0003] However, existing explosion relief doors or explosion relief windows generally need to wait until the pressure inside the energy storage cabinet rises to a certain level before triggering, so the reaction speed is relatively slow. Moreover, the explosion relief door or explosion relief window only realizes explosion relief based on pressure changes, with low accuracy and prone to ignoring other risk factors, such as overheating or short circuit. Summary of the Invention

[0004] This application provides an energy storage cabinet and an energy storage system to reduce the explosion risk and thus improve the safety of the energy storage cabinet.

[0005] In a first aspect, this application provides an energy storage cabinet. The energy storage cabinet includes a cabinet body, a plurality of battery packs, and an explosion relief cover. Specifically, the aforementioned plurality of battery packs are accommodated in the cabinet body. The cabinet body includes a cabinet panel, and the cabinet panel is provided with an explosion relief opening. The explosion relief cover is located outside the cabinet body and covers the explosion relief opening. The energy storage cabinet further includes a sensor, a triggering component, and a controller. The sensor is disposed inside the cabinet body, and the sensor is used to obtain the explosion relief parameters inside the cabinet body. The explosion relief parameters include at least one of the temperature inside the cabinet body, the concentration of combustible gas inside the cabinet body, the concentration of smoke inside the cabinet body, the total voltage of the aforementioned plurality of battery packs, the core temperature of the battery pack, and the core voltage of the battery pack. The triggering component is disposed on the explosion relief cover. The controller is electrically connected to the sensor and the triggering component, and the controller is used to receive the explosion relief parameters and control the triggering component to drive the explosion relief cover to open according to the explosion relief parameters.

[0006] The energy storage cabinet of this application has an explosion venting function. Before explosion venting, the explosion venting cover is covered on the explosion vent from the outside of the cabinet body, thus isolating the inside and outside of the cabinet body, preventing liquids or water vapor from entering the inside of the cabinet body through the explosion vent, and reducing the risk of liquid entering the cabinet body. The sensor inside the cabinet body can obtain the explosion venting parameters of the energy storage cabinet. When the inside of the cabinet body is on the verge of the explosion venting state, in response to the explosion venting parameters, the controller can control the triggering component to drive the explosion venting cover to open before an explosion occurs, thus realizing early explosion venting, reducing the explosion risk, and improving the safety of the energy storage cabinet. The explosion venting cover of this application can be manually opened from the outside of the cabinet body or remotely controlled to open.

[0007] In a possible implementation manner, the triggering component can be directly connected between the cabinet board and the explosion venting cover. Specifically, the triggering component can be an electric screw rod push rod. When specifically set, the triggering component includes a motor, a screw rod, and a push rod. The motor is arranged on the cabinet board, the screw rod is connected to the output end of the motor and extends towards the explosion venting cover, and the push rod is fixedly connected to the explosion venting cover and is in transmission connection with the screw rod. The controller can be used to control the motor to drive the screw rod so that the push rod drives the explosion venting cover to open, realizing early explosion venting.

[0008] In a possible implementation manner, the triggering component can be a spring. One end of the spring is connected to the cabinet board, and the other end is connected to the explosion venting cover. The controller is used to drive the spring to push the explosion venting cover to open.

[0009] When the triggering component is a spring, the energy storage cabinet can also include an electrically controlled limit bolt. Before explosion venting, the electrically controlled limit bolt can keep the explosion venting cover connected to the cabinet board.

[0010] In a possible implementation manner, the triggering component can also not be connected to the explosion venting cover. For example, the triggering component can be an electric spark generator, and the electric spark generator is arranged inside the cabinet body. The controller can be used to control the electric spark generator to ignite the combustible gas inside the cabinet body to generate an explosion, so that the explosion venting cover is separated from the explosion vent under the action of the explosion shock, realizing early explosion venting.

[0011] In the above implementation manner, the amount of combustible gas around the electric spark generator may be small. To ensure ignition, the energy storage cabinet can also include an ignition agent. The ignition agent is arranged close to the electric spark generator.

[0012] The above explosion venting parameters include at least one of the temperature inside the cabinet body, the concentration of combustible gas inside the cabinet body, the concentration of smoke inside the cabinet body, the total voltage of the above multiple battery packs, the cell temperature of the battery pack, and the cell voltage of the battery pack. When any one of the above explosion venting parameters reaches the set explosion venting condition, the controller can control the triggering component to drive the explosion venting cover to open the explosion venting cover, thus realizing early explosion venting. Specifically, the conditions for the controller to control the triggering component to drive the explosion venting cover to open can meet at least one of the following conditions:

[0013] Condition 1: The temperature inside the cabinet is greater than the set temperature; or

[0014] Condition 2: The concentration of combustible gas inside the cabinet is greater than the set concentration; or

[0015] Condition 3: The total voltage of multiple battery packs is greater than the set total voltage; or

[0016] Condition 4: The smoke concentration inside the cabinet is greater than the set smoke concentration; or

[0017] Condition 5: The core temperature of the battery pack is greater than the set core temperature; or

[0018] Condition 6: The core voltage of the battery pack is greater than the set core voltage.

[0019] In a possible implementation, the energy storage cabinet further includes a connection component. The connection component is located between the cabinet panel and the explosion vent cover. One end of the connection component is connected to the cabinet body, and the other end is connected to the explosion vent cover. The explosion vent cover includes a side edge, and this side edge is hinged to the cabinet panel. The connection component is used to limit the maximum opening angle between the explosion vent cover and the cabinet panel. During an explosion venting, under the action of the explosion pressure, the explosion vent cover rotates around the cabinet body in a direction away from the explosion vent, so that the inside and outside of the cabinet body are connected, realizing the explosion venting function of the energy storage cabinet. During the rotation of the explosion vent cover, since the two ends of the connection component are respectively connected to the cabinet body and the explosion vent cover, the connection component can limit the maximum included angle formed between the explosion vent cover and the cabinet body, thereby preventing the explosion vent cover from over-rotating due to the explosion shock, realizing the directional release of the internal pressure of the cabinet, and further improving the explosion venting safety of the energy storage cabinet.

[0020] The specific form of the above connection component is not limited. For example, the connection component can include a rope, a multi-link mechanism, or an electric screw rod pusher, etc.

[0021] In a possible implementation, the connection component can be a rope. One end of the rope is fixedly connected to the cabinet panel, and the other end of the rope is fixedly connected to the explosion vent cover. According to the set length of the rope, the maximum opening angle between the explosion vent cover and the cabinet panel can be limited.

[0022] In a possible implementation, the connection component can be a multi-link mechanism. The connection component can specifically include two connecting rods. One end of one connecting rod is hinged to the cabinet panel, and the other end is hinged to one end of the other connecting rod. The other end of the other connecting rod is hinged to the explosion vent cover. When the explosion vent cover covers the explosion vent, the two connecting rods rotate and fold respectively, so as to be accommodated on the side of the explosion vent cover facing the inside of the cabinet body. During an explosion venting, the two connecting rods rotate and unfold respectively. According to the set lengths of the two connecting rods, the maximum opening angle between the explosion vent cover and the cabinet panel can be limited.

[0023] In a possible implementation, the connecting component can be an electric screw push rod. Specifically, the connecting component can include a motor, a screw rod, and a push rod. Among them, the motor is arranged on the cabinet panel, the screw rod is connected to the output end of the motor and extends towards the explosion vent cover, the push rod is fixedly connected to the explosion vent cover and is in transmission connection with the screw rod. When the output end of the motor drives the screw rod to rotate, the push rod moves along the screw rod, thereby driving the explosion vent cover to rotate around the hinge. When the explosion vent cover is opened, the push rod can move to one end of the screw rod away from the cabinet panel, and the electric screw push rod can define the maximum opening angle between the explosion vent cover and the cabinet panel. When the explosion vent cover is closed, the motor drives the screw rod to rotate, so that the push rod moves to one end of the screw rod away from the explosion vent cover, and the explosion vent cover is restored to the state of covering the explosion vent.

[0024] The explosion vent cover of the present application can maintain the state of covering the explosion vent by being fixedly connected to the cabinet panel. Specifically, the explosion vent cover includes at least two side edges, one of which is hinged to the cabinet panel, and the other is fixedly connected to the cabinet panel. One of the aforementioned side edges can be adjacent or opposite to the other.

[0025] In a possible implementation, the fixed connection between the explosion vent cover and the cabinet panel is achieved through explosion-proof bolts. Specifically, the explosion-proof bolt includes a bolt and a gasket. The gasket is arranged on the surface of the explosion vent cover facing away from the cabinet panel. The bolt penetrates through the gasket and the explosion vent cover, and the bolt is threadedly connected to the cabinet panel.

[0026] In a possible implementation, the cabinet panel is provided with a magnetic attachment, and the explosion vent cover is provided with a magnetic part. The magnetic attachment is used for magnetic adsorption with the magnetic part.

[0027] In a possible implementation, a connecting strip is arranged on the side wall of the explosion vent. The connecting strip is used for fixedly connecting with the explosion vent cover to achieve the fixed connection between the explosion vent cover and the cabinet panel. A notch is arranged on the surface of the connecting strip facing away from the explosion vent cover. When an explosion occurs, under the action of the explosion impact force, the notch of the connecting strip breaks, so that the fixed connection between the explosion vent cover and the cabinet panel fails.

[0028] In the energy storage cabinet of the present application, the number of explosion vent covers is not limited. For example, in a possible implementation, the energy storage cabinet can include one explosion vent cover, and the rotation direction of this explosion vent cover is not restricted. In another possible implementation, the energy storage cabinet can include two explosion vent covers. The two explosion vent covers are arranged side by side and jointly cover the explosion vent. Among the two explosion vent covers, one side edge of one explosion vent cover away from the other explosion vent cover is hinged to the cabinet panel, and one side edge of the other explosion vent cover away from the one explosion vent cover is hinged to the cabinet panel, thereby realizing the split design of the explosion vent cover.

[0029] In a possible implementation, the energy storage cabinet may further include a fireproof cloth. Fireproof cloth may be provided at both ends of one side of the explosion vent cover. The cabinet board and the explosion vent cover are respectively connected to the fireproof cloth, thereby preventing the explosion flame from spraying out from the side between the explosion vent cover and the cabinet board.

[0030] In a second aspect, the present application provides an energy storage system. The energy storage system includes the energy storage cabinet of the first aspect described above, and a power converter. The power converter is configured to convert the alternating current input from an external alternating current power supply into direct current and output it to the energy storage cabinet, and / or the power converter is configured to convert the direct current output from the energy storage cabinet into alternating current and output it to a load or the power grid. In the energy storage system of the present application, the energy storage cabinet has an explosion venting function. When no explosion venting occurs, the explosion vent cover covers the explosion vent from the outside of the cabinet body, isolating the inside of the cabinet body from the outside of the cabinet body, which can prevent liquids, water vapor, etc. from entering the inside of the cabinet body through the explosion vent, thereby reducing the risk of liquid entering the cabinet body. The sensor inside the cabinet can obtain the explosion venting parameters of the energy storage cabinet. When the explosion venting parameters inside the cabinet body are critical to the explosion venting state, in response to the explosion venting parameters, the controller can control the triggering component to drive the explosion vent cover to open before an explosion occurs, thereby achieving early explosion venting to reduce the explosion risk and further improving the safety of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the energy storage system provided by an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the energy storage cabinet provided by an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the cooperation between the explosion vent cover and the cabinet board provided by an embodiment of the present application;

[0034] Figure 4 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet board provided by an embodiment of the present application;

[0035] Figure 5 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet board provided by an embodiment of the present application;

[0036] Figure 6 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet board provided by an embodiment of the present application;

[0037] Figure 7 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet board provided by an embodiment of the present application;

[0038] Figure 8 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet board provided by an embodiment of the present application;

[0039] Figure 9Another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application;

[0040] Figure 10 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application;

[0041] Figure 11 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application;

[0042] Figure 12 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application;

[0043] Figure 13 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application;

[0044] Figure 14 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application;

[0045] Figure 15 Another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application.

[0046] Reference numerals:

[0047] 10 - Energy storage system

[0048] 11 - Power converter

[0049] 20 - Energy storage cabinet

[0050] 21 - Cabinet body

[0051] 22 - Explosion vent cover

[0052] 23 - Trigger component

[0053] 24 - Electric control limit bolt

[0054] 25 - Ignition agent

[0055] 26 - Explosion vent bolt

[0056] 27 - Connection component

[0057] 28 - Fireproof cloth

[0058] 22a - First explosion vent cover

[0059] 22b - Second explosion vent cover

[0060] 27a - First connection component

[0061] 27b - Second connection component

[0062] 211 - Cabinet panel

[0063] 212 - Explosion vent

[0064] 213 - Connecting bar

[0065] 231 - Motor

[0066] 232 - Lead screw

[0067] 233 - Push rod

[0068] 241 - Bolt

[0069] 242 - Limit groove

[0070] 261 - Bolt

[0071] 262 - Washer Detailed implementation manners

[0072] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0073] It should be noted that the terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the description of the present application and the appended claims, the singular forms "a", "an", "the", "above", "said", "this" are also intended to include, for example, the expression "one or more", unless clearly indicated otherwise in the context.

[0074] Reference to "one embodiment" or "some embodiments" etc. described in this specification means that a specific feature, structure or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0075] To facilitate the understanding of the energy storage cabinet provided in the embodiments of the present application, the following describes its application scenarios. Energy storage batteries are important energy storage devices that can provide electrical energy to loads. Energy storage batteries are generally arranged in electrochemical energy storage cabinets or enclosures to facilitate the flexible adjustment of the positions of the energy storage batteries. The specific form of the energy storage cabinet in the present application is not limited. For example, it can be an energy storage cabinet, an energy storage enclosure, or an energy storage container. During long-term operation, energy storage batteries may experience thermal runaway and pose a risk of combustion and explosion. If an energy storage battery explodes inside a cabinet, it will cause the outer shell of the cabinet to disintegrate, and the shock wave, thermal radiation generated by the explosion, and the flying debris generated by the disintegration of the cabinet are likely to pose a threat to people or items near the cabinet. Therefore, energy storage cabinets are usually provided with explosion relief doors or explosion relief windows to release the shock wave and flame generated by the explosion, thus preventing the cabinet shell from disintegrating under a large explosion pressure. The explosion relief doors and explosion relief windows on existing energy storage cabinets are mainly opened by sensing the pressure change inside the cabinet, which results in a slow response speed, low accuracy, and is prone to ignoring risk factors such as battery overheating or circuit short circuit.

[0076] For this reason, the present application provides an energy storage cabinet and an energy storage system to reduce the explosion risk and thus improve the safety of the energy storage cabinet. The following describes the energy storage cabinet in the technical solution of the present application with reference to the accompanying drawings.

[0077] Figure 1 A schematic diagram of the energy storage system provided in the embodiments of the present application. As Figure 1 shown, the energy storage system 10 includes a power converter 11 and an energy storage cabinet 20. Among them, the power converter 11 is used to convert the alternating current input from an external alternating current power supply into direct current and output it to the energy storage cabinet 20, and / or the power converter 11 is used to convert the direct current output by the energy storage cabinet 20 into alternating current and output it to a load or the power grid. In the energy storage system 10 of the present application, the energy storage cabinet 20 has an explosion relief function. When there is no explosion relief, the inside of the energy storage cabinet 20 is isolated from the outside of the cabinet body, which can prevent liquids or water vapor from entering the inside of the energy storage cabinet 20 through the explosion relief port, thereby reducing the risk of liquid entering the energy storage cabinet 20. When the inside of the energy storage cabinet 20 is on the verge of the explosion relief state, the energy storage cabinet 20 can perform explosion relief in advance to reduce the explosion risk and further improve the safety of the energy storage system 10. In the embodiments of the present application, the explosion relief of the energy storage cabinet 20 can be manually opened from the outside, or can also be remotely opened.

[0078] Figure 2 A schematic diagram of the energy storage cabinet provided in the embodiments of the present application. As Figure 2As shown in the figure, the energy storage cabinet 20 includes a cabinet body 21, a plurality of battery packs (not shown in the figure), a pressure relief cover 22, a sensor (not shown in the figure), a triggering component 23, and a controller (not shown in the figure). Specifically, the cabinet body 21 includes a top plate, a bottom plate, and four side plates. The top plate and the bottom plate are arranged in parallel, and the four side plates are located between the top plate and the bottom plate and are respectively perpendicular to the top plate, so that the four side plates, the top plate, and the bottom plate enclose to form the cabinet body 21 to accommodate devices such as energy storage batteries. In this application, the side plate can be used as the cabinet board 211 of the cabinet body 21 for pressure relief. Specifically, the cabinet board 211 has a pressure relief port 212. The pressure relief cover 22 is located outside the cabinet body 21 and covers the pressure relief port 212. Figure 3 It is a schematic diagram of the cooperation between the pressure relief cover and the cabinet board provided by an embodiment of the present application. Figure 4 It is another schematic diagram of the cooperation between the pressure relief cover and the cabinet board provided by an embodiment of the present application, where Figure 3 the pressure relief cover is in the closed state. Figure 4 the pressure relief cover is in the open state. As shown in Figure 3 and Figure 4 shown, the triggering component 23 is arranged on the pressure relief cover 22. The controller is electrically connected to the sensor and the triggering component 23 respectively. The controller is used to receive the pressure relief parameters and control the triggering component 23 to drive the pressure relief cover 22 to open according to the pressure relief parameters. Figure 5 It is another schematic diagram of the cooperation between the pressure relief cover and the cabinet board provided by an embodiment of the present application. Figure 6 It is another schematic diagram of the cooperation between the pressure relief cover and the cabinet board provided by an embodiment of the present application, where Figure 5 the pressure relief cover is in the closed state. Figure 6 the pressure relief cover is in the open state. As shown in Figures 4 to 6 shown, when specifically setting the pressure relief cover 22, the pressure relief cover 22 is located outside the cabinet body 21. The cabinet board 211 is provided with a pressure relief port 212, and the pressure relief port 212 enables the inside and outside of the cabinet body 21 to communicate. The pressure relief cover 22 can cover one end of the pressure relief port 212, so that the pressure relief cover 22 can be in the closed state, that is, the inside and outside of the cabinet body 21 are in an isolated state, thereby preventing liquids or water vapor from entering the inside of the cabinet body 21 through the pressure relief port 212 to reduce the risk of liquid entering the cabinet body 21. When the energy storage cabinet 20 explodes, the pressure relief cover 22 can be separated from the pressure relief port 212 to enable the inside and outside of the cabinet body 21 to communicate to achieve pressure relief. The sensor is arranged inside the cabinet body 21 and is used to obtain the pressure relief parameters inside the cabinet body 21. The triggering component 23 is arranged on the pressure relief cover 22, and the controller can control the triggering component 23 to drive the pressure relief cover 22 to separate from the pressure relief port 212. In this way, when the internal state of the cabinet body 21 is critical to the explosion state, in response to the pressure relief parameters, the pressure relief cover 22 can explode in advance before the energy storage cabinet 20 explodes to reduce the explosion risk, thereby improving the safety of the energy storage cabinet 20.

[0079] In one embodiment, the explosion venting cover 22 may further include a battery management module. The explosion venting cover 22 and the battery pack may be connected to the battery management module respectively. The battery management module is used to receive the explosion venting parameters from the sensor, and control the trigger component 23 to drive the explosion venting cover 22 according to the explosion venting parameters. In an embodiment of the present application, the battery management module may integrate the battery management function and the explosion venting function, thereby improving the integration of the energy storage system 10.

[0080] like Figure 4 As shown, the trigger component 23 can be directly connected between the cabinet plate 211 and the explosion relief cover 22. Specifically, one end of the trigger component 23 can be connected to the explosion relief cover 22, and the other end can be connected to the cabinet plate 211. In response to the explosion relief parameter, the trigger component 23 can directly act on the explosion relief cover 22, pushing the explosion relief cover 22 to move in a direction away from the explosion relief port 212 to achieve early explosion relief. In this embodiment, the trigger component 23 can be specifically a spring or an electric lead screw push rod. Figure 7 Another schematic diagram of the coordination between the explosion venting cover and the cabinet panel provided in the embodiment of the present application. Figure 7 As shown, in a specific embodiment, the trigger component 23 can be a spring, one end of which is connected to the cabinet plate 211, and the other end is connected to the explosion relief cover 22. The energy storage cabinet 20 can also include an electrically controlled limit pin 24. The electrically controlled limit pin 24 includes a pin 241 and a limit groove 242, wherein the pin 241 can be set on the cabinet plate 211, and the limit groove 242 can be set on the explosion relief cover 22. When explosion relief does not occur, the pin 241 can be accommodated in the limit groove 242 to keep the explosion relief cover 22 connected to the cabinet plate 211. When the explosion relief parameter obtained by the sensor is critical to the explosion relief state, the pin 241 can be disengaged from the limit groove 242, and under the elastic force of the spring, the explosion relief cover 22 is disengaged from the explosion relief port 212. Figure 8 Another schematic diagram of the coordination between the explosion venting cover and the cabinet panel provided in the embodiment of the present application. Figure 8 As shown, in another specific embodiment, the trigger component 23 can also be an electric lead screw push rod, which includes a motor 231, a lead screw 232 and a push rod 233, wherein the motor 231 is arranged on the cabinet plate 211, the lead screw 232 is transmission-connected to the output end of the motor 231, the push rod 233 is transmission-connected to the end of the lead screw 232 away from the motor 231, and the push rod 233 is fixed to the explosion venting cover 22. When the motor 231 drives the lead screw 232 to rotate, the push rod 233 moves along the extension direction of the lead screw 232, and drives the explosion venting cover 22 to move in the direction away from the explosion venting port 212.

[0081] In the above embodiments, the triggering component 23 can be used to drive the explosion vent cover 22 away from the explosion vent 212 and can also connect the explosion vent cover 22 to the cabinet panel 211. Therefore, when the energy storage cabinet 20 vents, through the fixed connection between the explosion vent cover 22 and the cabinet panel 211 itself, the fixed connection can fail, thereby achieving venting.

[0082] In other embodiments, the triggering component 23 may not be connected to the explosion vent cover 22. Figure 9 This is another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application. As Figure 9 shown, in a specific embodiment, the triggering component 23 can be an electric spark generator. The electric spark generator can be arranged inside the cabinet body 21. In response to the venting parameters, the electric spark generator can ignite the combustible gas inside the cabinet body 21 to generate an explosion, so that the explosion vent cover 22 is separated from the explosion vent 212 under the action of the explosion shock to achieve early venting.

[0083] In the above embodiments, the position of the electric spark generator in the cabinet body 21 is not limited. For example, it can be arranged on the cabinet panel 211 or on the periphery of the cabinet panel 211. During actual venting, the amount of combustible gas around the electric spark generator may be small. Figure 10 This is another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application. As Figure 10 shown, to ensure successful ignition, the explosion vent cover 22 can further include an ignition agent 25, and the ignition agent 25 is arranged close to the electric spark generator. In a specific embodiment, the ignition agent 25 can be an aerosol. After the aerosol is ignited, the generated gas pressure ejects the explosion vent cover 22 to achieve the venting function during the explosion. At the same time, the gas generated by the combustion of the aerosol has the functions of inerting and extinguishing fire, and can extinguish the flame of the internal explosion of the cabinet body 21.

[0084] In the embodiment of the present application, the battery management module (controller) receives the venting parameters from the sensor and controls the triggering component 23 according to the venting parameters. Specifically, the conditions for the battery management module to control the triggering component 23 to drive the explosion vent cover 22 can include:

[0085] Condition 1: The temperature of the cabinet body 21 is greater than the set temperature. In Condition 1, the set temperature is less than the temperature when venting occurs in the energy storage cabinet 20.

[0086] Condition 2: The concentration of combustible gas in the cabinet body 21 is greater than the set concentration. In Condition 2, the set concentration is less than the concentration of combustible gas when venting occurs in the energy storage cabinet 20.

[0087] Condition 3: The total voltage of multiple battery packs is greater than the set total voltage. In Condition 3, the set total voltage is less than the total voltage of the battery packs when venting occurs in the energy storage cabinet 20.

[0088] Condition Four: The smoke concentration inside the cabinet body 21 is greater than the set smoke concentration. In Condition Four, the set smoke concentration is less than the smoke concentration when an explosion venting occurs inside the energy storage cabinet 20.

[0089] Condition Five: The core temperature of the battery pack is greater than the set core temperature. In Condition Five, the set core temperature is less than the core temperature when an explosion venting occurs inside the energy storage cabinet 20.

[0090] Condition Six: The core voltage of the battery pack is greater than the set core voltage. In Condition Six, the set core voltage is less than the core voltage when an explosion venting occurs inside the energy storage cabinet 20.

[0091] When any one of the above six conditions is met, the battery management module can control the trigger component 23 to achieve early explosion venting.

[0092] In this application, when there is no explosion venting, the explosion venting cover 22 remains connected to the cabinet board 211. In actual application, in addition to the trigger component 23 being able to drive the explosion venting cover 22, the explosion venting cover 22 can also be manually opened outside the energy storage cabinet 20.

[0093] In addition to the fixed connection between the cabinet board 211 and the explosion venting cover 22 being achieved through the above trigger component 23, the connection between the cabinet board 211 and the explosion venting cover 22 can also be achieved by means of screw connection or magnetic attraction. Figure 11 This is another schematic diagram of the cooperation between the explosion venting cover and the cabinet board provided by the embodiment of this application. As Figure 11 shown, in one embodiment, the explosion venting cover 22 further includes an explosion venting bolt 26, and the cabinet board 211 is fixedly connected to the explosion venting cover 22 through the explosion venting bolt 26. Specifically, the explosion venting bolt 26 includes a bolt 261 and a gasket 262. Among them, the gasket 262 is arranged on the surface of the explosion venting cover 22 facing away from the cabinet board 211, the bolt 261 passes through the gasket 262 and the explosion venting cover 22, and is threadedly connected to the cabinet board 211. In one embodiment, the gasket 262 can be an arc-shaped gasket. When an explosion occurs inside the cabinet body 21, under the action of the pressure generated by the explosion inside the cabinet body 21, the explosion venting cover 22 deforms the arc-shaped gasket, so that the function of the explosion venting bolt 26 for fixedly connecting the explosion venting cover 22 and the cabinet board 211 fails, so that the explosion venting cover 22 and the cabinet board 211 are separated at the fixed connection position, and the shock wave or flame generated by the explosion inside the cabinet body 21 can be released to the outside of the cabinet body 21 through the explosion venting port 212 to achieve explosion venting. In this embodiment, according to the preset pressure, the material of the gasket 262 can be selected so that the gasket 262 can deform under the action of the preset pressure.

[0094] In another embodiment, the cabinet panel 211 and the explosion vent cover 22 are fixedly connected by a magnetic attraction component. Specifically, the cabinet panel 211 is provided with a first magnetic attraction member, and a second magnetic attraction member is arranged on the surface of the explosion vent cover 22 facing the cabinet panel 211. The first magnetic attraction member and the second magnetic attraction member come into contact and are magnetically attracted to achieve the fixed connection between the explosion vent cover 22 and the cabinet panel 211. When an explosion occurs inside the cabinet body 21, under the action of the pressure generated by the explosion inside the cabinet body 21, the first magnetic attraction member and the second magnetic attraction member are separated, causing the fixed connection between the explosion vent cover 22 and the cabinet panel 211 to fail. In this embodiment, according to the preset pressure, the materials for the first magnetic attraction member and the second magnetic attraction member can be selected so that under the action of the preset pressure, the first magnetic attraction member and the second magnetic attraction member can be separated.

[0095] As Figure 9 and Figure 10 shown, in one embodiment, one side of the explosion vent cover 22 can be hinged to the cabinet panel 211. When the explosion vent cover 22 is in the open position, the fixed connection between the explosion vent cover 22 and the cabinet panel 211 fails, enabling the explosion vent cover 22 to rotate around the cabinet panel 211 at the hinge connection, so that the explosion vent cover 22 moves away from the explosion vent 212, thereby connecting the inside of the cabinet body 21 and the outside of the cabinet body 21 to achieve the explosion vent function of the energy storage cabinet 20. The explosion vent cover 22 further includes a connection component 27, and the connection component 27 is connected between the cabinet panel 211 and the explosion vent cover 22. During an explosion venting, the fixed connection between the explosion vent cover 22 and the cabinet panel 211 fails, causing the explosion vent cover 22 to rotate around the cabinet panel 211 at the hinge connection. The connection component 27 limits the rotation angle of the explosion vent cover 22, keeping an included angle between the explosion vent cover 22 and the cabinet panel 211, thereby preventing the explosion vent cover 22 from over-rotating due to the explosion venting impact and realizing the directional release of the pressure inside the cabinet body 21, that is, releasing from between the explosion vent cover 22 and the cabinet panel 211 to achieve the controllability of the explosion venting. Specifically, one end of the connection component 27 is connected to the surface of the explosion vent cover 22 facing the cabinet panel 211, and the other end is fixed on the cabinet panel 211. The specific form of the connection component 27 is not limited. For example, the connection component 27 can include a telescopic rod, a link-slider assembly, a multi-link mechanism hinge, or a rope. As Figure 9 and Figure 10 shown, in some embodiments, the connection component 27 can be a rope. When the explosion vent cover 22 is in the open state, the length of the rope limits the included angle between the explosion vent cover 22 and the cabinet panel 211. Figure 12 This is another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application. As Figure 12 shown, in another embodiment, the connection component 27 can be a double-link mechanism. When the explosion vent cover 22 is in the closed state, the double-link mechanism folds, causing the explosion vent cover 22 to cover the cabinet panel 211. When the explosion vent cover 22 is in the open state, the double-link mechanism unfolds, and the unfolding length of the double-link mechanism limits the included angle between the explosion vent cover 22 and the cabinet panel 211.

[0096] The fixed connection position of the explosion vent cover 22 of the present application and the cabinet panel 211 is different from the hinge position. Figure 13 It is another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application. As Figure 13 shown, in one embodiment, the explosion vent cover 22 has opposite first side L1 and second side L2. The first side L1 is hinged to the cabinet panel 211. The cabinet panel 211 is provided with a connecting strip 213, and the connecting strip 213 can be used for fixed connection with the second side L2. One end of the connecting component 27 is connected to the connecting strip 213, and the other end is connected to the second side L2.

[0097] In the explosion vent cover 22 of the present application, the number of explosion vent covers 22 is not limited. As Figure 12 shown, in some embodiments, the explosion vent cover 22 may include one explosion vent cover 22, and the rotation direction of the explosion vent cover 22 is not limited. For example, the explosion vent cover 22 can be opened upward, downward, to the right or to the left. Figure 14 It is another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application. As Figure 14 shown, in some other embodiments, the explosion vent cover 22 may include a first explosion vent cover 22a and a second explosion vent cover 22b. The first explosion vent cover 22a and the second explosion vent cover 22b are arranged oppositely and jointly cover the explosion vent 212. The side of the first explosion vent cover 22a away from the second explosion vent cover 22b is hinged to the cabinet panel 211, and the side of the second explosion vent cover 22b away from the first explosion vent cover 22a is hinged to the cabinet panel 211. That is to say, the first explosion vent cover 22a and the second explosion vent cover 22b are arranged in a split-open manner. In this implementation manner, the explosion vent cover 22 further includes a first connecting component 27a and a second connecting component 27b. The first connecting component 27a connects the first explosion vent cover 22a and the cabinet panel 211, and the second connecting component 27b connects the second explosion vent cover 22b and the cabinet panel 211.

[0098] Figure 15 It is another schematic diagram of the cooperation between the explosion vent cover and the cabinet panel provided by the embodiment of the present application. As Figure 15 shown, in one embodiment, the explosion vent cover 22 may further include a fireproof cloth 28. The fireproof cloth 28 is located between the cabinet panel 211 and the explosion vent cover 22, and the cabinet panel 211, the explosion vent cover 22 and the connecting component 27 are respectively connected to the fireproof cloth 28, so as to prevent the flame from spraying out from the side during explosion and further achieve directional explosion venting.

[0099] Based on the same technical concept, the present application provides a control method for the above energy storage cabinet 20. Specifically, the control method includes:

[0100] Step S101, obtaining the explosion vent parameters inside the cabinet body 21.

[0101] Step S102, in response to the above explosion vent parameters, controlling the explosion vent cover 22 to open.

[0102] In the control method of the present application, when the inside of the energy storage cabinet 20 is on the verge of the explosion relief state, in response to the explosion relief parameters, the explosion relief cover 22 can be controlled to open, so as to relieve the explosion in advance, reduce the explosion risk, and further improve the safety of the energy storage cabinet 20.

[0103] The above are only the specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A energy storage cabinet, characterized in that, The energy storage cabinet includes a cabinet body, a plurality of battery packs, and a pressure relief cover. Among them, the plurality of battery packs are accommodated in the cabinet body; the cabinet body includes a cabinet board, and the cabinet board is provided with a pressure relief opening; the pressure relief cover is located outside the cabinet body and covers the pressure relief opening; The energy storage cabinet further includes a sensor, a triggering component, and a controller; the sensor is arranged in the cabinet body and is used to obtain the pressure relief parameters in the cabinet body, and the pressure relief parameters include at least one of the temperature in the cabinet body, the concentration of combustible gas in the cabinet body, the concentration of smoke in the cabinet body, the total voltage of the plurality of battery packs, the core temperature of the battery pack, and the core voltage of the battery pack; the triggering component is arranged on the pressure relief cover; the sensor and the triggering component are respectively electrically connected to the controller, and the controller is used to receive the pressure relief parameters and control the triggering component to drive the pressure relief cover to open according to the pressure relief parameters.

2. The energy storage cabinet according to claim 1, characterized in that, The triggering component includes a motor, a lead screw, and a push rod. The motor is arranged on the cabinet board, the lead screw is connected to the output end of the motor and extends towards the pressure relief cover, the push rod is fixedly connected to the pressure relief cover and the push rod is in transmission connection with the lead screw; The controller is used to control the motor to drive the lead screw so that the push rod drives the pressure relief cover to open.

3. The energy storage cabinet according to claim 1, characterized in that, The triggering component is an electric spark generator, and the electric spark generator is arranged in the cabinet body; the controller is used to control the electric spark generator to ignite the combustible gas in the cabinet body.

4. The energy storage cabinet according to claim 3, characterized in that, The energy storage cabinet further includes an ignition agent, and the ignition agent is arranged close to the electric spark generator.

5. The energy storage cabinet according to claim 1, characterized in that, The triggering component is a spring. One end of the spring is connected to the cabinet board, and the other end of the spring is connected to the pressure relief cover; the controller is used to drive the spring to push the pressure relief cover to open.

6. The energy storage cabinet according to any one of claims 1 to 5, characterized in that, The conditions for the controller to control the triggering component to drive the pressure relief cover to open include: The temperature in the cabinet body is greater than the set temperature; or The concentration of combustible gas in the cabinet body is greater than the set concentration; or The total voltage of the plurality of battery packs is greater than the set total voltage; or The concentration of smoke in the cabinet body is greater than the set smoke concentration; or The core temperature of the battery pack is greater than the set core temperature; or The core voltage of the battery pack is greater than the set core voltage.

7. The energy storage cabinet according to any one of claims 1 to 6, characterized in that, The energy storage cabinet further includes a connection component, and the connection component is located between the cabinet board and the pressure relief cover; one end of the connection component is connected to the cabinet body, and the other end is connected to the pressure relief cover; one side edge of the pressure relief cover is hinged to the cabinet board; the connection component is used to limit the maximum opening angle between the pressure relief cover and the cabinet board.

8. The energy storage cabinet according to claim 7, characterized in that, The connection component is a rope, one end of the rope is fixedly connected to the cabinet board, and the other end of the rope is fixedly connected to the pressure relief cover.

9. The energy storage cabinet according to claim 7, characterized in that, The connection component includes two connecting rods. One end of one of the two connecting rods is hinged to the cabinet board, the other end of the one connecting rod is hinged to one end of the other connecting rod, and the other end of the other connecting rod is hinged to the pressure relief cover.

10. The energy storage cabinet according to claim 7, characterized in that, The connecting component includes a motor, a lead screw, and a push rod. The motor is disposed on the cabinet board. The lead screw is connected to the output end of the motor and extends towards the explosion vent cover. The push rod is fixedly connected to the explosion vent cover and is in transmission connection with the lead screw.

11. The energy storage cabinet according to any one of claims 1 to 10, characterized in that, The explosion vent cover is connected to the cabinet board by explosion vent bolts; The explosion vent bolts include bolts and gaskets. The gaskets are disposed on the surface of the explosion vent cover facing away from the cabinet board. The bolts penetrate through the gaskets and the explosion vent cover and are threadedly coupled to the cabinet board.

12. The energy storage cabinet according to any one of claims 1 to 11, characterized in that, The cabinet board is provided with magnetic attachments, and the explosion vent cover is provided with magnetic members. The magnetic attachments are used for magnetic adsorption with the magnetic members.

13. The energy storage cabinet according to any one of claims 1 to 12, characterized in that, The side wall of the explosion vent is provided with connecting strips for connecting with the explosion vent cover. The surface of the connecting strip facing away from the explosion vent cover is provided with notches.

14. The energy storage cabinet according to any one of claims 1 to 13, characterized in that, The energy storage cabinet includes two explosion vent covers. The two explosion vent covers are arranged side by side and jointly cover the explosion vent. One side of one explosion vent cover away from the other explosion vent cover is hinged to the cabinet board, and one side of the other explosion vent cover away from the one explosion vent cover is hinged to the cabinet board.

15. The energy storage cabinet according to any one of claims 1 to 14, characterized in that, Fireproof cloths are respectively arranged at both ends of the explosion vent cover. The cabinet board and the explosion vent cover are respectively connected to the fireproof cloths.

16. An energy storage system, characterized in that, The energy storage system includes the energy storage cabinet according to any one of claims 1 to 15, and a power converter. Wherein, the power converter is used for converting alternating current input from an external alternating current power supply into direct current and outputting it to the energy storage cabinet, and / or, the power converter is used for converting the direct current output by the energy storage cabinet into alternating current and outputting it to a load or the power grid.

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