Energy storage container and energy storage container explosion relief structure

Abstract

The utility model belongs to the technical field of energy storage system safety protection, specifically discloses a kind of energy storage container's venting structure and energy storage container.The utility model provides the venting structure of energy storage container of the top of cabinet body is equipped with frame structure, frame structure includes top frame and multiple crossbeam, structural strength is high, frame structure is formed with pressure relief port, each pressure relief port is defined by mounting frame, venting plate is fixedly connected with mounting frame, the integration of the connecting structure of venting plate and cabinet body is realized, the connecting strength of venting plate and cabinet body is improved, venting plate is not easy to fall off or fail;Venting plate is set to the top of cabinet body, when pressure relief, gas in cabinet body is released to safe area towards the upper portion of cabinet body, the direction of shock wave is effectively controlled, avoid lateral injection to cause harm to the equipment or person around cabinet body, improve the security level of energy storage container.

Description

Technical Field

[0001] This utility model relates to the field of energy storage system safety protection technology, and in particular to an explosion venting structure for an energy storage container and an energy storage container. Background Technology

[0002] Energy storage containers are an important component of energy stations such as photovoltaic power stations and wind-solar hybrid power stations. They consist of a cabinet and energy storage batteries arranged inside the cabinet. For each energy station, thermal runaway of energy storage batteries is a major safety threat. When thermal runaway occurs, a large amount of flammable gas will accumulate, and the gas pressure inside the cabinet will rise rapidly, which may lead to an explosion of the energy storage container, seriously endangering the safety of other equipment and personnel in the surrounding area.

[0003] To prevent such incidents, existing energy storage containers have pressure relief vents on the container body, which are then sealed with explosion-proof plates. When thermal runaway occurs in the energy storage battery, causing a rapid increase in pressure inside the container, the explosion-proof plates are subjected to significant force and break open, opening the pressure relief vents and allowing the gas inside the container to escape quickly, reducing the pressure and lowering the likelihood of an explosion. However, the existing explosion-proof plates have an unreasonable layout; the direction of pressure relief can easily cause secondary damage, and the connection strength between the explosion-proof plates and the container body is insufficient, making them prone to detachment or failure in the event of an explosion. Utility Model Content

[0004] The purpose of this utility model is to provide an explosion relief structure for an energy storage container and an energy storage container. The direction of pressure relief is unlikely to cause secondary damage, and the connection strength between the explosion relief plate and the container body is high, making the explosion relief plate less likely to fall off or fail.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a pressure relief structure for an energy storage container is provided, comprising a cabinet and at least one pressure relief plate. The top of the cabinet is provided with a frame structure, the frame structure comprising a top frame and a plurality of crossbeams, the crossbeams being spaced apart and connected to the top frame. At least one pressure relief port is formed in the frame structure, each pressure relief port being defined by a mounting frame. The pressure relief plate blocks the pressure relief port, and the area enclosed by the mounting frame, the crossbeams, and the top frame is covered with a top plate.

[0007] As an optional technical solution for the explosion relief structure of the aforementioned energy storage container, the mounting frame includes four bottom frames, which are connected end to end to form the pressure relief port. The bottom frames are fixedly connected to the frame structure, and a load-bearing plate is fixedly provided on the upper surface of each bottom frame. The explosion relief plate is fixedly connected to the load-bearing plate.

[0008] As an optional technical solution for the explosion venting structure of the aforementioned energy storage container, the upper surface of the explosion venting plate is set higher than the top plate.

[0009] As an optional technical solution for the explosion relief structure of the aforementioned energy storage container, the circumferential edge of the mounting frame is provided with a frame, one end of the frame is connected to the outer wall of the mounting frame, and part of the frame is placed between the mounting frame and the frame structure. The other end of the frame is higher than the upper surface of the explosion relief plate. The frame is provided with a drain outlet, and the outer side of the top plate is provided with a corrugated plate. The drain outlet communicates with the recess of the corrugated plate to form a drainage channel.

[0010] As an optional technical solution for the explosion relief structure of the aforementioned energy storage container, an installation frame is provided between two adjacent crossbeams or between the outermost crossbeam and the top frame. The installation frame is welded to the two adjacent crossbeams or to the crossbeam and the top frame, and the explosion relief plate is connected to the installation frame by bolts.

[0011] As an optional technical solution for the explosion venting structure of the aforementioned energy storage container, the explosion venting plate is configured one-to-one with the energy storage batteries installed inside the container, and the explosion venting plate is positioned above the energy storage batteries.

[0012] As an optional technical solution for the explosion venting structure of the aforementioned energy storage container, the total explosion venting area of ​​the explosion venting plate is greater than or equal to 2.202㎡.

[0013] As an optional technical solution for the explosion venting structure of the aforementioned energy storage container, the explosion venting plate is provided with a first insulation layer on the side facing the inside of the container.

[0014] And / or, the explosion relief plate is provided with a second insulation layer on the side facing the outside of the cabinet.

[0015] As an optional technical solution for the explosion relief structure of the aforementioned energy storage container, the container also includes a door panel, which is equipped with a pressure relief valve configured to open and release pressure.

[0016] Secondly, an energy storage container is provided, including an energy storage battery and the aforementioned explosion venting structure of the energy storage container, wherein the energy storage battery is disposed inside the container.

[0017] Beneficial effects:

[0018] The explosion relief structure of the energy storage container provided by this utility model has a frame structure on the top of the container, which includes a top frame and multiple crossbeams. The frame structure has high structural strength and pressure relief ports formed in it. Each pressure relief port is defined by a mounting frame. The explosion relief plate is fixedly connected to the mounting frame, realizing the integrated connection structure between the explosion relief plate and the container, improving the connection strength between the explosion relief plate and the container, and making the explosion relief plate less likely to fall off or fail. The explosion relief plate is set at the top of the container. When depressurization occurs, the gas inside the container is released towards the upper part of the container to a safe area, effectively controlling the direction of the shock wave and avoiding lateral spray that may cause damage to equipment or people around the container, thereby improving the safety level of the energy storage container. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the energy storage container provided in this embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the installation frame provided in an embodiment of the present utility model;

[0021] Figure 3 This is an exploded structural diagram of the mounting frame provided in an embodiment of the present utility model;

[0022] Figure 4 yes Figure 1 A partial structural diagram at point A.

[0023] In the picture:

[0024] 1. Cabinet body; 2. Explosion relief panel; 3. Mounting frame;

[0025] 11. Top frame; 12. Crossbeam; 13. Top plate; 14. Corrugated board; 15. Door panel; 16. Side panel;

[0026] 31. Pressure relief port; 32. Base frame; 33. Support plate; 34. Frame; 341. Drain outlet. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] like Figure 1 As shown, this embodiment provides a pressure relief structure for an energy storage container, which includes a cabinet 1 and at least one pressure relief plate 2. The top of the cabinet 1 is provided with a frame structure, which includes a top frame 11 and multiple crossbeams 12. The crossbeams 12 are spaced apart and connected to the top frame 11. At least one pressure relief port 31 is formed in the frame structure. Each pressure relief port 31 is defined by a mounting frame 3. The pressure relief plate 2 blocks the pressure relief port 31. The area enclosed by the mounting frame 3, the crossbeams 12 and the top frame 11 is covered by a top plate 13.

[0032] The top of the cabinet 1 is equipped with a frame structure, which includes a top frame 11 and multiple crossbeams 12. The frame structure has high structural strength and includes pressure relief ports 31. Each pressure relief port 31 is defined by a mounting frame 3. The explosion relief plate 2 is fixedly connected to the mounting frame 3, realizing the integrated connection structure between the explosion relief plate 2 and the cabinet 1. This improves the connection strength between the explosion relief plate 2 and the cabinet 1, making it less likely for the explosion relief plate 2 to fall off or fail. The explosion relief plate 2 is located at the top of the cabinet 1. During pressure relief, the gas inside the cabinet 1 is released towards the upper part of the cabinet 1 to a safe area, effectively controlling the direction of the shock wave and avoiding lateral spraying that could cause damage to equipment or people around the cabinet 1, thus improving the safety level of the energy storage container.

[0033] In some embodiments, a mounting frame 3 is provided between two adjacent crossbeams 12 or between the outermost crossbeam 12 and the top frame 11. The mounting frame 3 is welded to the two adjacent crossbeams 12 or to the crossbeams 12 and the top frame 11 to form a load-bearing system integrated with the cabinet 1, which improves the impact resistance and pull-out resistance of the mounting frame 3, and prevents the explosion relief plate 2 from falling off during pressure relief. The explosion relief plate 2 and the mounting frame 3 are connected by bolts, which facilitates the installation and removal of the explosion relief plate 2. In addition, the combination of the high-strength welded mounting frame 3 and the bolt-fixed explosion relief plate 2 improves the structural stability of the connection between the explosion relief plate 2 and the cabinet 1, and the mounting frame 3 is not prone to deformation or connection failure.

[0034] Optionally, multiple crossbeams 12 are arranged parallel to each other and spaced apart along the length of the top frame 11. The two ends of the crossbeams 12 are fixedly connected to the two opposite sides of the top frame 11, resulting in high structural strength and providing space for the installation of the mounting frame 3.

[0035] like Figure 2 and Figure 3 As shown, in some embodiments, the mounting frame 3 includes four bottom frames 32, which are connected end-to-end to form a pressure relief port 31. The bottom frames 32 are fixedly connected to the frame structure. Specifically, two opposing bottom frames 32 are fixedly connected to two crossbeams 12, or to the outermost crossbeam 12 and the top frame 11. A load-bearing plate 33 is fixedly provided on the upper surface of each bottom frame 32, and the explosion relief plate 2 is fixedly connected to the load-bearing plate 33, which improves the structural strength of the mounting frame 3 and thus improves the connection strength between the explosion relief plate 2 and the cabinet 1.

[0036] Optionally, the bottom frame 32 is welded to the crossbeam 12 and the top frame 11 respectively, forming a load-bearing system integrated with the cabinet 1, which improves the impact resistance and pull-out resistance of the mounting frame 3, and makes it less likely for the explosion relief plate 2 to fall off during pressure relief. In some other embodiments, the bottom frame 32 is bolted to the crossbeam 12 and the top frame 11, which facilitates the replacement and maintenance of the mounting frame 3.

[0037] For example, the bottom frame 32 can be made of 1.6mm thick cold-rolled steel plate. The bottom frame 32 has a U-shaped structure, and one side plate of the bottom frame 32 is bent at the end away from the bottom plate to form a bent plate connected to the load-bearing plate 33. The side plate of the bottom frame 32 is connected to the crossbeam 12 or the top frame 11. The load-bearing plate 33 can be made of 25mm thick flat steel, which has a strong load-bearing capacity.

[0038] The structure of the explosion relief plate is existing technology. In this embodiment, the explosion relief plate 2 is made of stainless steel, which has excellent corrosion resistance and high temperature resistance. The opening pressure is set at 0.1 bar (10 kPa), and it can complete the rupture opening within 15 ms to 20 ms after a sudden pressure increase, achieving rapid pressure relief. The explosion relief plate 2 is connected to the load-bearing plate 33 by bolts. The explosion relief plate 2 has multiple bolt holes spaced evenly around its circumference to ensure that the preload of the explosion relief plate 2 and the mounting frame 3 are consistent, the force on the explosion relief plate 2 is balanced, and the sealing of the connection between the explosion relief plate 2 and the mounting frame 3 is guaranteed.

[0039] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the upper surface of the explosion relief plate 2 is set higher than the top plate 13 to prevent rainwater from accumulating on or around the explosion relief plate 2, causing corrosion of the explosion relief plate 2 or affecting the sensitivity and sealing performance of the explosion relief plate 2.

[0040] Optionally, the circumferential edge of the mounting frame 3 is provided with a frame 34. One end of the frame 34 is connected to the outer wall of the mounting frame 3, and part of the frame 34 is placed between the mounting frame 3 and the frame structure. Specifically, part of the frame 34 is placed between the mounting frame 3 and the crossbeam 12 or between the mounting frame 3 and the top frame 11, further improving the structural strength of the mounting frame 3. The frame 34 is welded to the mounting frame 3, the crossbeam 12, and the top frame 11 respectively. The other end of the frame 34 is higher than the upper surface of the explosion relief plate 2. The frame 34 is provided with a drain outlet 341. The outer side of the top plate 13 is provided with a corrugated plate 14. The drain outlet 341 communicates with the recess of the corrugated plate 14 to form a drainage channel. Rainwater can be discharged through the drain outlet 341 and the recess of the corrugated plate 14, avoiding the accumulation of rainwater on or around the explosion relief plate 2, which could cause corrosion of the explosion relief plate 2 or affect the sensitivity and sealing performance of the explosion relief plate 2.

[0041] In some embodiments, the explosion relief plate 2 is configured one-to-one with the energy storage battery installed in the cabinet 1. The explosion relief plate 2 is positioned above the energy storage battery to achieve precise point-to-point pressure relief, minimize the delay in pressure relief caused by pressure propagation, and improve the accuracy of explosion relief.

[0042] The total explosion venting area of ​​explosion venting plate 2 is greater than or equal to 2.202㎡, which meets the pressure relief requirements of the energy storage container. The total explosion venting area of ​​explosion venting plate 2 is related to the size of the energy storage container and the number and size of the energy storage batteries installed inside, etc., which will not be elaborated here.

[0043] The specifications and dimensions of the explosion relief plate 2 vary and can be selected according to the size of the energy storage container and the layout of the internal energy storage batteries, etc., and no specific limitation is made here.

[0044] In some embodiments, the explosion relief plate 2 is provided with a first insulation layer on the side facing the inside of the cabinet 1, which reduces the cold bridge effect while ensuring the stability of the energy storage container. It is suitable for wide temperature range operating environments, and the energy storage container can operate stably for a long time in harsh environments without frequent maintenance.

[0045] In other embodiments, the explosion relief plate 2 is provided with a second insulation layer on the side facing outward from the cabinet 1, which reduces the cold bridge effect while ensuring the stability of the energy storage container. It is suitable for wide temperature range operating environments, and the energy storage container can operate stably for a long time in harsh environments without frequent maintenance.

[0046] In other embodiments, the explosion relief plate 2 is provided with a first insulation layer on the side facing the inside of the cabinet 1, and a second insulation layer on the side facing the outside of the cabinet 1, which has better weather resistance and makes the energy storage container more suitable for extreme climate environments.

[0047] See also Figure 1 As shown, the cabinet 1 also includes a bottom frame, the four corners of which are connected to the four corners of the top frame 11 by support beams to form a cuboid frame structure. The bottom frame is covered with a bottom plate, and side plates 16 are arranged around the support beams between the bottom frame and the top frame 11. The side plates 16 have openings, and door panels 15 are provided at the openings. The bottom plate, side plates 16, door panels 15, top plate 13 and explosion relief plate 2 form a closed box structure.

[0048] The door panel 15 is equipped with a pressure relief valve, which is configured to open and release pressure. The pressure relief valve and the explosion relief plate 2 form a multi-stage explosion-proof pressure relief mechanism, which improves the safety of the energy storage container.

[0049] This embodiment also provides an energy storage container, including an energy storage battery and the explosion venting structure of the energy storage container described above, with the energy storage battery placed inside the cabinet 1.

[0050] The aforementioned explosion-proof structure is also applicable to sealed equipment compartments that require explosion-proof pressure relief, such as power cabinets and chemical containers, or to battery compartment explosion-proof systems in the fields of ships and rail transit, or to energy storage devices for new energy vehicles that require explosion-proof pressure relief.

[0051] The explosion venting structure provided in this embodiment can release high-pressure gas upwards to a safe area, effectively controlling the direction of the shock wave and preventing secondary fires or damage to other equipment caused by lateral jetting. According to measured data, under the trigger condition of 0.1 bar internal pressure in cabinet 1, the energy storage container can complete all explosion venting actions within 20 ms, rapidly suppressing the peak pressure, which could have risen to 7.98 bar, to below 0.68 bar, significantly reducing the risk of structural damage. Furthermore, the integrated drainage, insulation, and corrosion protection design allows the energy storage container to operate stably for extended periods in harsh environments such as high humidity, salt spray, and extreme temperature differences, requiring minimal maintenance. In summary, this explosion venting structure combines high response speed, high structural reliability, good environmental adaptability, and standardized compliance, making it particularly suitable for applications with extremely high safety requirements, such as large-scale electrochemical energy storage power stations and lithium battery containerized energy storage modules.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. The explosion venting structure of an energy storage container, characterized in that, The cabinet (1) includes a cabinet body (1) and at least one explosion relief plate (2). The top of the cabinet body (1) is provided with a frame structure, which includes a top frame (11) and multiple crossbeams (12). The crossbeams (12) are spaced apart and connected to the top frame (11). At least one pressure relief port (31) is formed in the frame structure. Each pressure relief port (31) is defined by a mounting frame (3). The explosion relief plate (2) blocks the pressure relief port (31). The area enclosed by the mounting frame (3), the crossbeams (12) and the top frame (11) is covered with a top plate (13).

2. The explosion venting structure of the energy storage container according to claim 1, characterized in that, The mounting frame (3) includes four bottom frames (32), which are connected end to end to form the pressure relief port (31). The bottom frames (32) are fixedly connected to the frame structure. Each bottom frame (32) has a load-bearing plate (33) fixedly installed on its upper surface. The explosion relief plate (2) is fixedly connected to the load-bearing plate (33).

3. The explosion venting structure of the energy storage container according to claim 1, characterized in that, The upper surface of the explosion relief plate (2) is set higher than the top plate (13).

4. The explosion venting structure of the energy storage container according to claim 3, characterized in that, The mounting frame (3) has a frame (34) on its circumferential edge. One end of the frame (34) is connected to the outer wall of the mounting frame (3), and part of the frame (34) is placed between the mounting frame (3) and the frame structure. The other end of the frame (34) is higher than the upper surface of the explosion relief plate (2). The frame (34) has a drain outlet (341). The outer side of the top plate (13) has a corrugated plate (14). The drain outlet (341) communicates with the recess of the corrugated plate (14) to form a drainage channel.

5. The explosion venting structure of the energy storage container according to claim 1, characterized in that, The mounting frame (3) is provided between two adjacent crossbeams (12) or between the outermost crossbeam (12) and the top frame (11). The mounting frame (3) is welded to the two adjacent crossbeams (12) or to the crossbeams (12) and the top frame (11). The explosion relief plate (2) is connected to the mounting frame (3) by bolts.

6. The explosion venting structure of the energy storage container according to claim 1, characterized in that, The explosion relief plate (2) is arranged in a one-to-one correspondence with the energy storage battery set in the cabinet (1), and the explosion relief plate (2) is set above the energy storage battery.

7. The explosion venting structure of the energy storage container according to claim 1, characterized in that, The total explosion relief area of ​​the explosion relief plate (2) is greater than or equal to 2.202㎡.

8. The explosion venting structure of the energy storage container according to claim 1, characterized in that, The explosion relief plate (2) has a first insulation layer on the side facing the inside of the cabinet (1); And / or, the explosion relief plate (2) is provided with a second insulation layer on the side facing outward from the cabinet (1).

9. The explosion venting structure of the energy storage container according to claim 1, characterized in that, The cabinet (1) also includes a door panel (15) on which a pressure relief valve is provided, the pressure relief valve being configured to open and release pressure.

10. An energy storage container, characterized in that, The container includes an energy storage battery and an explosion venting structure for an energy storage container as described in any one of claims 1-9, wherein the energy storage battery is disposed inside the container (1).

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