Energy storage cabinet with explosion venting structure

Abstract

The invention relates to an energy storage cabinet with an explosion venting structure, which comprises a cabinet body and is characterized in that a top cover at the top of the cabinet body is provided with a skylight to form a pressure relief channel, the skylight is communicated with the interior of the cabinet body, the top cover is provided with the explosion venting structure, the explosion venting structure comprises an explosion venting plate, and the explosion venting plate is provided with an explosion venting hole. An explosion venting plate in sealed connection with the top cover is arranged on the top cover and located on the periphery of the skylight, the explosion venting plate covers the skylight, a heat preservation structure is arranged at the bottom of the explosion venting plate, and when the internal pressure of the cabinet body is suddenly increased, the explosion venting plate is burst open, and flames and combustible gas are sprayed out of the skylight through a pressure relief channel. In a normal state, the explosion venting structure is in a dormant state, the explosion venting structure has good dustproof, waterproof and heat preservation effects, normal operation of equipment is maintained, and after the explosion venting structure is started in an emergency state, high-temperature and high-pressure gas can rapidly escape according to a set route, the concentration of combustible gas is reduced, and the possibility of continuous combustion is prevented.

Description

Technical Field

[0001] The present invention relates to an energy storage cabinet, in particular to an energy storage cabinet with an explosion relief structure. Background Art

[0002] New energy applications and energy storage technologies have experienced rapid growth in recent years, but the introduction of safety measures and related standards has lagged behind, and requirements vary widely. During operation, electrochemical lithium battery energy storage cabinets are subject to thermal runaway hazards, including overcharging, battery short circuits, thermal management failure, battery damage, and electrolyte leakage. These hazards can directly lead to large-scale fires that are difficult to extinguish.

[0003] When thermal runaway occurs in the energy storage battery, the lithium battery will cause violent combustion and explosion. The heat and rapidly expanding volume cannot be released in the confined space, which will cause great destructive force, breaking open the cabinet door or bursting the cabinet body, causing disasters to peripheral equipment and personnel.

[0004] In other words, once a single battery cell experiences thermal runaway, uncontrolled flammable and explosive gases can spread through the cable trench to other energy storage compartments, easily causing a large-scale explosion. To address this pressure relief issue, the most commonly used solution in the industry is to install a pressure relief valve at the bottom of the cabinet. However, this valve has a slow activation speed, low release capacity, and ineffectiveness. Summary of the Invention

[0005] The purpose of the present invention is to provide an energy storage cabinet with an explosion relief structure that is not only simple in structure but also has a rapid pressure relief response. Under normal circumstances, the explosion relief structure is in a dormant state, has good dustproof, waterproof and heat-insulating effects, and maintains the normal operation of the equipment. When activated in an emergency, high-temperature and high-pressure gas can quickly escape along a predetermined route, reducing the concentration of combustible gas and preventing the possibility of continued combustion.

[0006] In order to achieve the above-mentioned object, the technical solution of the present invention is: an energy storage cabinet with an explosion relief structure, including a cabinet body, the innovation of which is:

[0007] A skylight is provided on the top cover of the cabinet body, forming a pressure relief channel, and the skylight is connected to the interior of the cabinet body.

[0008] The top cover is provided with an explosion relief structure, which includes an explosion relief plate. The explosion relief plate is provided on the top cover and is located around the skylight and is sealed with the top cover. The explosion relief plate covers the skylight, and an insulation structure is provided at the bottom of the explosion relief plate.

[0009] When the internal pressure of the cabinet suddenly increases, the explosion vent plate is opened, allowing flames and combustible gases to spray out from the skylight through the pressure relief channel.

[0010] In the above technical solution, a flange frame is provided on the top cover and around the skylight, a flange edge is provided on the outer periphery of the explosion relief plate, and the flange edge is sealed and connected to the flange frame.

[0011] In the above technical solution, a lower mounting hole is provided on the flange frame, and a nut is provided at the bottom of the flange frame and at the lower mounting hole. An upper mounting hole corresponding to the lower mounting hole is provided on the flange edge. The fastening screw in the upper mounting hole passes through the lower mounting hole and is screwed onto the nut, so that the flange frame and the flange edge are connected as one.

[0012] In the above technical solution, sealant is applied around the inner side surface of the flange frame so that the joint surface between the flange frame and the flange edge forms a sealed connection.

[0013] In the above technical solution, at least one notch is provided at the junction between the explosion relief plate and the flange edge, and the notch is covered with sealant.

[0014] In the above technical solution, the thermal insulation structure is one of rock wool, polyurethane, glass wool, slag wool, and glass fiber.

[0015] In the above technical solution, the cabinet is provided with a control compartment and a battery compartment that are isolated from each other, the control compartment is provided with cooling and heating equipment and an electrical box, the battery compartment is provided with a battery pack, and the skylight is provided on the top of the battery compartment.

[0016] In the above technical solution, the control compartment has a control compartment door, and the battery compartment has a battery compartment door.

[0017] The positive effect of the present invention is that after adopting the energy storage cabinet with explosion relief structure of the present invention, a skylight is provided on the top cover of the cabinet body to form a pressure relief channel, and the skylight is connected to the interior of the cabinet body.

[0018] The top cover is provided with an explosion relief structure, which includes an explosion relief plate. The explosion relief plate is provided on the top cover and is located around the skylight and is sealed with the top cover. The explosion relief plate covers the skylight, and an insulation structure is provided at the bottom of the explosion relief plate.

[0019] When the energy storage cabinet is operating normally, the explosion relief structure on the top cover is in a dormant state, which has good dustproof and waterproof effects, can block the wind, sand and rain from the outside, and also has a heat preservation effect, meeting the protection requirements of outdoor operation and maintaining the normal operation of the equipment.

[0020] When the explosion pressure inside the energy storage cabinet reaches the set value and the internal pressure of the cabinet suddenly increases, the explosion relief structure is instantly opened by the explosion pressure, that is, the explosion relief plate is opened, releasing high-temperature and high-pressure combustible gas and flames through the pressure relief channel and ejected from the skylight, so that the high-temperature and high-pressure gas can quickly escape along the predetermined route, reducing the concentration of combustible gas, preventing the possibility of continued combustion, and preventing high-temperature gas and flames from being ejected onto pedestrians, flammable objects and equipment.

[0021] Therefore, during the operation of the cabinet, the present invention can not only meet the protection requirements, but also trigger the protection mechanism when the battery thermal runaway fire and explosion occurs. It can relieve pressure in the specified direction, reduce the hazards of the cabinet being exploded and the uncontrollable direction of flame spraying, and make the new energy equipment safer in the operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of a specific embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the explosion relief structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the top cover and the cabinet body of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the top cover of the present invention;

[0026] Figure 5 It is a schematic diagram of the state when the present invention is enabled. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and given embodiments, but the present invention is not limited thereto.

[0028] like Figure 1 、 2 , 3, 4, and 5 show an energy storage cabinet with an explosion relief structure, comprising a cabinet body 1, a top cover 11 mounted on the top of the cabinet body 1, and sealed with a sealant on all sides.

[0029] A skylight 12 is provided on the top cover 11 of the cabinet 1 to form a pressure relief channel, and the skylight 12 is connected to the interior of the cabinet 1.

[0030] The top cover 11 is provided with an explosion relief structure, which includes an explosion relief plate 2. The explosion relief plate 2 is provided on the top cover 11 and is located around the skylight 12 and is sealed with the top cover 11. The explosion relief plate 2 covers the skylight 12, and an insulation structure 3 is provided at the bottom of the explosion relief plate 2.

[0031] When the internal pressure of the cabinet 1 suddenly increases, the explosion relief plate 2 is opened, and the flame and combustible gas are ejected from the skylight 12 through the pressure relief channel.

[0032] Further, such as Figure 1 As shown, in order to facilitate the positioning connection between the explosion relief structure and the top cover, a flange frame 4 is provided on the top cover 11 and around the skylight 12, and a flange edge 21 is provided on the outer periphery of the explosion relief plate 2, and the flange edge 21 is sealed with the flange frame 4.

[0033] Further, such as Figure 2 、 4 As shown, in order to improve the assembly efficiency of the flange frame and the flange edge, a lower mounting hole 41 is provided on the flange frame 4, and a nut 42 is provided at the bottom of the flange frame 4 and located at the lower mounting hole 41. An upper mounting hole 211 corresponding to the lower mounting hole 41 is provided on the flange edge 21. The fastening screw 4 in the upper mounting hole 211 passes through the lower mounting hole 41 and is screwed onto the nut 42, so that the flange frame 4 and the flange edge 21 are connected as one.

[0034] Further, if Figure 4 As shown, in order to prevent external wind, sand and rain from invading the interior of the cabinet and affecting the normal operation of the equipment, and to improve the sealing between the flange frame and the explosion-proof structure, sealant 43 is applied around the inner side surface of the flange frame 4, so that the joint surface of the flange frame 4 and the flange edge 21 forms a sealed connection.

[0035] Further, if Figure 4 As shown, in order to ensure that the explosion venting plate can be instantly opened by the explosion pressure when a fire or explosion occurs, at least one notch 212 is provided at the connection between the explosion venting plate 2 and the flange edge 21, and the notch 212 is covered with sealant. The three sides of the explosion venting plate 2 of the present invention are connected to the flange edge 21 through the notch 212, which further stabilizes the explosion venting plate so that a rapid response can be achieved when it is triggered.

[0036] Further, such as Figure 2 As shown, in order to alleviate heat conduction, avoid excessive internal temperature variation, and stabilize the operating temperature of the battery, the thermal insulation structure 3 is one of rock wool, polyurethane, glass wool, slag wool, and glass fiber.

[0037] Further, such as Figure 3As shown, to ensure the independence of the control components and batteries, the cabinet 1 is equipped with a mutually isolated control compartment 13 and battery compartment 14. The control compartment 13 houses the cooling and heating equipment and the electrical box, while the battery compartment 14 houses the battery pack. The skylight 12 is located on the top of the battery compartment 14. The battery compartment 14 contains several lithium iron phosphate battery packs, which perform charging and discharging functions, helping to reduce peak loads and fill valleys on the power grid, supporting grid stability, regulating frequency response speed, improving power quality, preventing waste of new energy, and providing microgrid coverage. The control compartment 13 houses the cooling and heating equipment and the electrical box, enabling control of energy storage and release.

[0038] Further, if Figure 1 、 3 As shown in Figures 5 and 6, to ensure the battery compartment is sealed and has good thermal insulation, waterproof, and dustproof properties, the battery compartment 14 has a battery compartment door 16, and the inner side of the battery compartment door 16 is also equipped with a thermal insulation structure. To ensure the sealing of the control compartment, the control compartment 13 has a control compartment door 15. This design also has the advantage of separating the control compartment and the battery compartment into two completely independent sealed spaces, allowing for targeted opening during subsequent maintenance.

[0039] When the energy storage cabinet is operating normally, the explosion relief structure provided on the top cover 11 is in a dormant state, which has good dustproof and waterproof effects and can block the wind, sand and rain from the outside. In addition, a thermal insulation structure 3 is provided at the bottom of the explosion relief plate 2 to ensure the thermal insulation effect, meet the protection requirements of outdoor operation, and maintain the normal operation of the equipment.

[0040] like Figure 5 As shown, when the energy storage battery has thermal runaway, the lithium battery will cause violent combustion and explosion. When the pressure inside the battery compartment suddenly increases and the explosion pressure reaches the set value, the explosion venting plate is designed to be the weakest link in the cabinet structure. The huge heat and rapidly expanding combustible gas are released into the air through the explosion venting structure on the top of the cabinet, that is, the explosion venting plate responds quickly and is opened, opening the pressure relief channel, releasing the high-temperature and high-pressure combustible gas and flame through the pressure relief channel and ejecting from the skylight 12, so that the high-temperature and high-pressure gas can quickly escape along the predetermined route, reducing the concentration of the combustible gas and suffocating it in the air. Discharge from the top of the cabinet can prevent the high-temperature gas and flame from being sprayed onto pedestrians, flammable materials and spreading to other equipment, thereby preventing the accident from expanding.

[0041] The explosion relief structure of the present invention is disposable and needs to be discarded after explosion relief. When the fire is extinguished, the explosion relief structure can be replaced to achieve the reuse of the cabinet, thereby reducing maintenance costs.

[0042] Therefore, the present invention not only meets protection requirements during cabinet operation, but also triggers a protective mechanism in the event of a battery thermal runaway fire or explosion, releasing pressure in a specified direction. This reduces the risk of cabinet rupture and uncontrollable flame direction, making new energy equipment safer for grid operation. Firstly, it protects the equipment from overall damage, and secondly, it protects personnel, external flammable materials, and facilities from secondary hazards. Furthermore, the present invention's design takes into account both the cabinet top's sealing and insulation under normal conditions, as well as fire and explosion relief capabilities in emergency situations.

[0043] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. An energy storage cabinet with an explosion relief structure, comprising a cabinet body (1), characterized in that: A skylight (12) is provided on the top cover (11) of the cabinet (1), forming a pressure relief channel, and the skylight (12) is connected to the interior of the cabinet (1). The top cover (11) is provided with an explosion relief structure, the explosion relief structure comprising an explosion relief plate (2), the explosion relief plate (2) being sealed and connected to the top cover (11) and being located on the periphery of the skylight (12), the explosion relief plate (2) covering the skylight (12), and a heat preservation structure (3) being provided at the bottom of the explosion relief plate (2). When the internal pressure of the cabinet (1) is too high, the explosion relief plate (2) is opened, and the flame and combustible gas are ejected from the skylight (12) through the pressure relief channel.

2. The energy storage cabinet with explosion relief structure according to claim 1, characterized in that: A flange frame (4) is provided on the top cover (11) and around the skylight (12); a flange edge (21) is provided on the outer periphery of the explosion relief plate (2), and the flange edge (21) is sealedly connected to the flange frame (4).

3. The energy storage cabinet with explosion relief structure according to claim 2, characterized in that: The flange frame (4) is provided with a lower mounting hole (41), and a nut (42) is provided at the bottom of the flange frame (4) and located at the lower mounting hole (41). The flange edge (21) is provided with an upper mounting hole (211) corresponding to the lower mounting hole (41). The fastening screw (4) in the upper mounting hole (211) passes through the lower mounting hole (41) and is screwed onto the nut (42), so that the flange frame (4) and the flange edge (21) are connected as a whole.

4. The energy storage cabinet with explosion relief structure according to claim 2, characterized in that: Sealant (43) is applied around the inner side surface of the flange frame (4), so that the joint surface of the flange frame (4) and the flange edge (21) forms a sealed connection.

5. The energy storage cabinet with explosion relief structure according to claim 1, characterized in that: At least one notch (212) is provided at the junction between the explosion relief plate (2) and the flange edge (21), and the notch (212) is covered with sealant.

6. The energy storage cabinet with explosion relief structure according to claim 1, characterized in that: The thermal insulation structure (3) is one of rock wool, polyurethane, glass wool, slag wool, and glass fiber.

7. The energy storage cabinet with explosion relief structure according to claim 1, characterized in that: The cabinet (1) is provided with a control compartment (13) and a battery compartment (14) that are isolated from each other. The control compartment (13) is provided with a cooling and heating device and an electrical box. The battery compartment (14) is provided with a battery pack. The skylight (12) is provided on the top of the battery compartment (14).

8. The energy storage cabinet with explosion relief structure according to claim 7, characterized in that: The control compartment (13) has a control compartment door (15), and the battery compartment (14) has a battery compartment door (16).

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