Explosion venting structure and energy storage device

Abstract

The application provides a kind of explosion venting structure and energy storage equipment, the energy storage equipment includes the explosion venting structure, the explosion venting structure includes bearing frame, explosion venting sheet and protective plate. Wherein, the bearing frame is opened with explosion venting passage. The explosion venting sheet is connected to the bearing frame, and seals the explosion venting passage. The protective plate is movably arranged on the bearing frame and supported on the explosion venting sheet, and the protective plate is located on the side of the explosion venting sheet close to the bearing frame, and / or the protective plate is movably arranged on the bearing frame and covers the side of the explosion venting sheet away from the bearing frame. The explosion venting structure and energy storage equipment of the application improve the technical problem that the strength of the explosion venting structure in the related art is too low.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to an explosion venting structure and energy storage device. Background Technology

[0002] In related technologies, energy storage devices such as energy storage containers and outdoor cabinets need to be designed with explosion-proof structures. These structures are designed to open when the internal pressure of the system reaches a certain threshold after thermal runaway of the battery pack, thereby releasing the high-temperature, high-pressure gases from the energy storage device. However, the explosion-proof structures in these technologies are often too weak and easily damaged by external forces. Utility Model Content

[0003] The embodiments of this application provide a venting structure and an energy storage device, which can improve the technical problem of excessively low strength of venting structures in related technologies.

[0004] In a first aspect, embodiments of this application provide an explosion venting structure, comprising:

[0005] A support frame, wherein an explosion venting channel is provided on the support frame;

[0006] An explosion venting disc is connected to the supporting frame and seals the explosion venting channel;

[0007] A protective plate is movably mounted on the supporting frame and supported by the explosion venting disc, with the protective plate located on the side of the explosion venting disc closer to the supporting frame, and / or the protective plate is movably mounted on the supporting frame and covers the side of the explosion venting disc opposite to the supporting frame. This arrangement can, to a certain extent, improve the structural strength of the explosion venting structure and prevent the explosion venting disc from being easily damaged by external forces.

[0008] In some embodiments, the supporting frame is provided with an annular limiting groove, and the bottom of the annular limiting groove is provided with the explosion venting channel. The protective plate overlaps within the annular limiting groove. This arrangement ensures that the protective plate improves the structural strength of the explosion venting device without causing the explosion venting structure to fail to release pressure in a timely manner.

[0009] In some embodiments, the explosion vent is connected to the support frame and covers the side of the protective plate opposite to the bottom of the annular limiting groove. This arrangement avoids the problem of the explosion vent not opening in time due to the arrangement of the protective plate.

[0010] In some embodiments, a thermal insulation layer is provided on the side of the protective plate near the bottom of the annular limiting groove. This arrangement prevents condensation from forming on the explosion-proof structure.

[0011] In some embodiments, the insulation layer includes at least one of an insulation cotton layer, a polystyrene foam layer, and an aerogel felt layer. This configuration provides the explosion-proof structure with good thermal insulation and good flame-retardant properties.

[0012] In some embodiments, the protective plate is provided with reinforcing members. This arrangement improves the structural strength of the protective plate.

[0013] In some embodiments, the reinforcing member includes a plurality of reinforcing ribs disposed on the surface of the protective plate, the plurality of reinforcing ribs being parallel or staggered to form a grid structure. This arrangement ensures high structural strength throughout the protective plate, preventing damage from external forces.

[0014] In some embodiments, along the height direction of the explosion venting structure, the thickness A of the explosion venting sheet satisfies the relationship: 0.2mm≤A≤0.5mm.

[0015] In some embodiments, the venting disc is connected to the supporting frame at least by adhesive or welding; and / or,

[0016] The explosion venting disc and the protective plate are connected by at least adhesive or welding. This arrangement facilitates the manufacture of the explosion venting structure and provides a good sealing effect between the explosion venting disc and the protective plate, as well as between the explosion venting disc and the load-bearing frame.

[0017] In some embodiments, the explosion venting disc is provided with a first annular welding area and a second annular welding area. The first annular welding area is located inside the second annular welding area. The first annular welding area is welded to the supporting frame, and the second annular welding area is welded to the protective plate. This arrangement improves the connection stability between the explosion venting disc and the supporting frame and the protective plate.

[0018] In some embodiments, the explosion venting structure further includes a seal connected to the support frame to seal the gap between the support frame and the predetermined equipment. This configuration prevents the explosion venting structure from failing to open in a timely manner to release pressure.

[0019] Secondly, this application also provides an energy storage device, which includes the aforementioned explosion venting structure.

[0020] Unlike related technologies, this application features a protective plate, which enhances the structural strength of the explosion vent and prevents external objects from exerting external forces on the explosion vent, thus preventing it from rupturing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the energy storage device provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the explosion venting structure provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the explosion structure of a venting structure provided in an embodiment of this application;

[0025] Figure 4 This is an exploded structural diagram of another explosion venting structure provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the load-bearing frame provided in an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the structure of the protective plate provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the structure of the explosion vent provided in the embodiments of this application.

[0029] The above figures include the following reference numerals:

[0030] 1. Energy storage device; 10. Housing; 20. Explosion relief structure; 21. Bearing frame; 22. Explosion relief disc; 23. Protective plate; 24. Sealing element; 211. Explosion relief channel; 212. Annular limiting groove; 213. First connecting hole; 221. First annular welding area; 222. Second annular welding area; 230. Rectangular plate; 231. Reinforcing component; 240. Annular sealing gasket; 241. Second connecting hole; 2311. Reinforcing rib; 2312. Vertical reinforcing rib; 2313. Horizontal reinforcing rib. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0032] In related technologies, the explosion venting structure of energy storage devices typically involves scoring the explosion venting plate. When the internal pressure of the energy storage device reaches a predetermined pressure, the score on the explosion venting plate is broken, thereby releasing the pressure. However, in these technologies, because the explosion venting plate is usually located on the outer surface of the energy storage device, scoring the plate results in insufficient structural strength, making it prone to cracking when subjected to external forces.

[0033] To address the problems existing in the relevant technologies, please refer to the appendix. Figures 1 to 2 As shown, this application provides an energy storage device 1, which includes a housing 10, a battery pack, and an explosion venting structure 20. The explosion venting structure 20 includes a supporting frame 21, an explosion venting plate 22, and a protective plate 23.

[0034] The supporting frame 21 has an explosion venting channel 211, and the explosion venting plate 22 is connected to the supporting frame 21 and seals the explosion venting channel 211. Figure 3 and Figure 4As shown, the protective plate 23 is movably disposed on the support frame 21 and supported on the side of the explosion relief disc 22 close to the support frame 21, and / or, the protective plate 23 is movably disposed on the support frame 21 and covers the side of the explosion relief disc 22 away from the support frame 21. It is worth mentioning that: "The protective plate 23 is movably disposed on the support frame 21 and supported by the explosion relief disc 22, and the protective plate 23 is located on the side of the explosion relief disc 22 close to the support frame 21, and / or the protective plate 23 is movably disposed on the support frame 21 and covers the side of the explosion relief disc 22 away from the support frame 21" refers to one of the following three situations: the protective plate 23 is movably disposed on the support frame 21 and supported by the explosion relief disc 22, and the protective plate 23 is located on the side of the explosion relief disc 22 close to the support frame 21; the protective plate 23 is movably disposed on the support frame 21 and covers the side of the explosion relief disc 22 away from the support frame 21; the protective plate 23 is movably disposed on the support frame 21 and supported by the explosion relief disc 22, and the protective plate 23 is located on the side of the explosion relief disc 22 close to the support frame 21; and the protective plate 23 is movably disposed on the support frame 21 and covers the side of the explosion relief disc 22 away from the support frame 21. Furthermore, the protective plate 23 being movably mounted on the load-bearing frame 21 means that there is no connection between the protective plate 23 and the load-bearing frame 21, and the load-bearing frame 21 can apply load-bearing force to the protective plate 23. In this embodiment, the explosion relief disc 22 includes an aluminum foil sheet.

[0035] Specifically, the supporting frame 21 is connected to the outer surface of the housing 10 of the energy storage device 1. When the battery pack inside the energy storage device 1 experiences thermal runaway, the pressure inside the energy storage device 1 increases sharply, and high-pressure gas flows into the explosion venting channel 211, subsequently impacting the explosion venting disc 22, causing the explosion venting disc 22 to separate from the supporting frame 21, allowing the high-pressure gas to be discharged from the energy storage device 1. Unlike related technologies, this application provides a protective plate 23. The protective plate 23 improves the structural strength of the explosion venting disc 22, preventing other objects outside the energy storage device 1 from applying external force to the explosion venting disc 22, which could cause the explosion venting disc 22 to rupture.

[0036] On the other hand, the explosion venting structure in related technologies also includes a mechanically opening and closing structure. That is, when the battery pack in the energy storage device experiences thermal runaway, the energy storage device can control the mechanically opening and closing explosion venting structure to open, rather than using high-pressure gas to rupture the explosion venting structure. Compared with the mechanically opening and closing explosion venting structure 20, the explosion venting structure 20 of this application has a simpler structure and lower manufacturing cost.

[0037] In some embodiments, such as Figure 3 and Figure 5 As shown, the supporting frame 21 is provided with an annular limiting groove 212, and the bottom of the annular limiting groove 212 is provided with an explosion relief channel 211. The protective plate 23 overlaps in the annular limiting groove 212.

[0038] In one specific embodiment, the explosion relief disc 22 seals the explosion relief channel 211, and the protective plate 23 overlaps within the annular limiting groove 212, located at the bottom of the groove opposite to the explosion relief disc 22. When the energy storage device 1 needs to release pressure, the high-pressure gas impacts the explosion relief disc 22, causing it to rupture or creating a gap between it and the explosion relief channel 211. Since the protective plate 23 overlaps within the annular limiting groove 212 and is not connected to the supporting frame 21, the high-pressure gas can be discharged through the explosion relief channel 211. When the battery pack inside the energy storage device 1 does not experience thermal runaway, the protective plate 23 is located outside the explosion relief disc 22. When an external object applies external force to the protective plate 23, the protective plate 23 transmits the applied force to the supporting frame 21 through the annular limiting groove 212, thereby preventing the explosion relief disc 22 from rupturing.

[0039] In another specific embodiment, the explosion relief disc 22 is connected to the support frame 21 and covers the side of the protective plate 23 opposite to the bottom of the annular limiting groove 212.

[0040] Similarly, when the energy storage device 1 needs to release pressure, since the protective plate 23 overlaps with the annular limiting groove 212 and does not seal the explosion venting channel 211, high-pressure gas can impact the explosion venting disc 22 through the explosion venting channel 211, causing the explosion venting disc 22 to separate from the supporting frame 21 or to rupture, thus flowing out of the energy storage device 1. However, when the battery pack in the energy storage device 1 does not experience thermal runaway, when an external object applies external force to the explosion venting disc 22, since the protective plate 23 is located between the explosion venting disc 22 and the supporting frame 21, the external force applied to the explosion venting disc 22 will be sequentially transmitted to the protective plate 23 and the supporting frame 21, thereby preventing the explosion venting disc 22 from rupturing due to the external force to a certain extent.

[0041] It is known that some energy storage devices 1 will be placed outdoors for operation. Furthermore, the explosion venting structure 20 is thinner than the outer casing, resulting in poor heat insulation at the explosion venting structure 20. Due to the temperature difference between the inside and outside of the energy storage device 1, condensation easily forms on the explosion venting structure 20. This condensation, upon contact with the battery pack, may cause thermal runaway. Therefore, to prevent condensation on the explosion venting structure 20, in some embodiments, a thermal insulation layer (not shown in the figure) is provided on the side of the protective plate 23 near the bottom of the annular limiting groove 212. This thermal insulation layer improves the heat insulation capacity of the explosion venting structure 20, thereby preventing condensation to some extent. Additionally, in this embodiment, the thermal insulation layer is placed on the protective plate 23, which does not increase the strength of the explosion venting plate 22 and has almost no impact on the normal pressure relief of the explosion venting plate 22.

[0042] In some embodiments, the insulation layer includes at least one of an insulation cotton layer, a polystyrene foam layer, and an aerogel felt layer. Specifically, the insulation cotton layer, the polystyrene foam layer, and the aerogel felt layer have high thermal insulation performance and high temperature resistance, which on the one hand ensures the thermal insulation effect of the explosion venting structure 20 and prevents condensation from forming on the explosion venting structure 20; on the other hand, it avoids the problem of the insulation layer burning due to high-temperature and high-pressure gas generated in the energy storage device 1. In addition, the insulation cotton layer can be made of rock wool with excellent fire resistance.

[0043] In practice, after a certain period of operation, outdoor energy storage devices 1 are prone to component failure or damage due to the influence of the external environment, thus requiring maintenance. During maintenance, personnel may inevitably step on or impact the explosion venting structure 20, potentially damaging the protective plate 23. Since the protective plate 23 is located between the explosion venting plate 22 and the supporting frame 21, replacing it necessitates removing the explosion venting plate 22 as well, leading to excessive maintenance costs. Therefore, to prevent damage to the protective plate 23, in some embodiments, a reinforcing component 231 is provided on it. Specifically, the reinforcing component 231 further improves the structural strength of the protective plate 23, thereby mitigating the problem of damage caused by excessive external force applied to the protective structure when maintenance personnel step on the explosion venting structure 20 or in other situations.

[0044] In some embodiments, such as Figure 6 As shown, the reinforcing component 231 includes a plurality of reinforcing ribs 2311, which are disposed on the surface of the protective plate 23, and the plurality of reinforcing ribs 2311 are parallel or interlaced to form a grid structure.

[0045] Specifically, the grid structure formed by multiple parallel or intersecting reinforcing ribs 2311 can uniformly improve the structural strength of the protective plate 23, preventing damage from external forces due to insufficient structural strength in certain areas of the protective plate 23. In a specific embodiment, the protective plate 23 is a rectangular plate 230, and the reinforcing ribs 2311 include transverse reinforcing ribs 2313 and vertical reinforcing ribs 2312. The transverse reinforcing ribs 2313 are along the width direction of the rectangular plate 230 (as shown in the attached figure). Figure 5 The vertical stiffener 2312 extends along the length of the rectangular plate 230 (as shown in the attached figure) in the Y direction. Figure 5Extending in the X direction, multiple transverse reinforcing ribs 2313 and multiple vertical reinforcing ribs 2312 are parallel or interlaced to form a grid structure, and the insulation layer is disposed within the grid structure. In this embodiment, the reinforcing ribs 2311 are disposed on the side of the protective plate 23 near the bottom of the annular limiting groove 212. In addition, in some embodiments, the protective plate 23 may also be a circular plate or a trapezoidal plate. Any other variation within the concept of this application is within the protection scope of this application.

[0046] In some embodiments, the explosion relief disc 22 includes various models with different thicknesses, and these models can be selectively connected to the supporting frame 21 and the protective plate 23. It is understood that different thicknesses of the explosion relief disc 22 allow it to withstand different impact strengths of high-pressure gas. That is, the same supporting frame 21 and protective plate 23 structure can adapt to different design burst pressure requirements by replacing the explosion relief disc 22 with one of different thicknesses, thus improving the adaptability of the explosion relief structure 20.

[0047] In some embodiments, the explosion vent 22 and the supporting frame 21 are connected at least by adhesive bonding or welding. Specifically, the connection between the explosion vent 22 and the supporting frame 21 by adhesive bonding or welding is a simple process that eliminates the need for a sealing gasket between the explosion vent 22 and the supporting frame 21, thus achieving a good sealing effect. In one specific embodiment, the explosion vent 22 and the supporting frame 21 are connected by laser welding.

[0048] In some embodiments, the explosion vent 22 and the protective plate 23 are connected by at least adhesive bonding or welding. That is, the explosion vent 22 and the protective plate 23 are connected by adhesive bonding or welding, thereby improving the connection stability between the protective plate 23 and the explosion vent 22 to a certain extent. When an external object acts on the explosion vent 22, the explosion vent 22 can quickly transfer the external force to the protective plate 23. Similarly, in a specific embodiment, the explosion vent 22 and the protective plate 23 are connected by laser welding.

[0049] In some embodiments, along the height direction of the explosion venting structure 20 (as shown in the attached figure) Figure 3In the Z-direction, the thickness A of the explosion vent 22 satisfies the following relationship: 0.2mm ≤ A ≤ 0.5mm. When the thickness A of the explosion vent 22 satisfies the above relationship, the thickness of the explosion vent 22 is moderate, and the explosion vent 22 can open in time when impacted by internal high-pressure gas. At the same time, the explosion vent 22 also has a certain strength to prevent external components from applying external force to the explosion vent 22, which could lead to damage. When A is less than 0.2mm, the explosion vent 22 is too thin, and it is easy to break under the external force applied by other components. When A is greater than 0.5mm, this may result in the high-pressure gas impact being insufficient to break the explosion vent 22 in the event of thermal runaway of the battery pack inside the energy storage device. In this embodiment, the value of A can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, and 0.5mm.

[0050] See appendix Figure 7 As shown, in some embodiments, the explosion relief plate 22 is provided with a first annular welding area 221 and a second annular welding area 222. The first annular welding area 221 is located inside the second annular welding area 222. The first annular welding area 221 is welded to the supporting frame 21, and the second annular welding area 222 is welded to the protective plate 23.

[0051] Specifically, the protective plate 23 is welded to the first annular welding area 221 and overlaps within the annular limiting groove 212. The explosion vent 22 is welded to the supporting frame 21 via the second annular welding area 222, with the first annular welding area 221 located inside the second annular welding area 222. When the battery pack inside the energy storage device 1 experiences thermal runaway, the high-pressure gas inside can enter the gap between the protective plate 23 and the annular limiting groove 212, impacting the explosion vent 22 between the first and second annular welding areas 221 and 222, causing the explosion vent 22 to separate from the supporting frame 21. After the explosion vent 22 separates from the supporting frame 21, because the explosion vent 22 is welded to the protective plate 23, the explosion vent 22 will also move along with the protective plate 23, causing the protective plate 23 to detach from the annular limiting groove 212, thereby increasing the gas flow rate within the explosion venting channel 211, enabling the energy storage device 1 to quickly depressurize.

[0052] In some embodiments, the explosion relief structure 20 further includes a seal 24 connected to the support frame 21 for sealing the gap between the support frame 21 and the predetermined device.

[0053] Specifically, the intended device can be energy storage device 1 or other equipment capable of installing the explosion relief structure 20. The reason for providing a seal 24 on the supporting frame 21 is to improve the sealing performance between the supporting frame 21 and the intended device, preventing gas from leaking out through the gap between the supporting frame 21 and the intended device during the depressurization process of the energy storage device 1, thus preventing the explosion relief disc 22 from opening properly. In this embodiment, the seal 24 includes an annular sealing gasket 240. The supporting frame 21 has a first connecting hole 213, and the annular sealing gasket 240 has a second connecting hole 241 that matches the first connecting hole 213. The annular sealing gasket 240 and the supporting frame 21 are fixed together by bolts passing through the first connecting hole 213 and the second connecting hole 241.

[0054] In summary, the explosion venting structure 20 and energy storage device 1 of this application have at least the following beneficial effects:

[0055] (1) The explosion relief structure 20 of this application includes a load-bearing frame 21, an explosion relief plate 22 and a protective plate 23. The setting of the protective plate 23 greatly improves the structural strength of the explosion relief structure 20 and can, to a certain extent, prevent external objects of the energy storage device 1 from exerting external force on the explosion relief plate 22, which would cause the explosion relief plate 22 to be damaged.

[0056] (2) The supporting frame 21 of this application is provided with an annular limiting groove 212, and the bottom of the annular limiting groove 212 is provided with a venting channel 211. The protective plate 23 overlaps the annular limiting groove 212, which means that the protective plate 23 will not seal the venting channel 211. When the venting plate 22 is opened, the high pressure gas can push the protective plate 23 away from the venting channel 211, so as to avoid the protective plate 23 affecting the high pressure gas to be depressurized through the venting channel 211.

[0057] (3) The protective plate 23 of this application is provided with a reinforcing component 231. The reinforcing component 231 includes multiple reinforcing ribs 2311. The multiple reinforcing ribs 2311 are parallel or intersecting to form a grid structure. The grid structure formed by the multiple reinforcing ribs 2311 can uniformly improve the structural strength of the protective plate 23 and to a certain extent prevent the protective plate 23 from being easily damaged by external forces.

[0058] (4) The protective plate 23 and the explosion relief plate 22 of this application are connected by adhesive or welding, and the explosion relief plate 22 and the load-bearing frame 21 are connected by adhesive or welding. The process is simple and the sealing performance is good.

[0059] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An explosion venting structure (20), characterized in that, include: A support frame (21) is provided with an explosion venting channel (211); An explosion relief disc (22) is connected to the supporting frame (21) and seals the explosion relief channel (211); A protective plate (23) is movably disposed on the supporting frame (21) and supported on the explosion relief plate (22), and the protective plate (23) is located on the side of the explosion relief plate (22) close to the supporting frame (21), and / or the protective plate (23) is movably disposed on the supporting frame (21) and covers the side of the explosion relief plate (22) away from the supporting frame (21).

2. The explosion venting structure (20) according to claim 1, characterized in that, The supporting frame (21) is provided with an annular limiting groove (212), and the bottom of the annular limiting groove (212) is provided with the explosion relief channel (211). The protective plate (23) overlaps in the annular limiting groove (212).

3. The explosion venting structure (20) according to claim 2, characterized in that, The explosion relief plate (22) is connected to the supporting frame (21) and covers the side of the protective plate (23) away from the bottom of the annular limiting groove (212).

4. The explosion venting structure (20) according to claim 2, characterized in that, The protective plate (23) has an insulation layer on the side near the bottom of the annular limiting groove (212).

5. The explosion venting structure (20) according to claim 4, characterized in that, The insulation layer includes at least one of the following: insulation cotton layer, polystyrene foam layer, and aerogel felt layer.

6. The explosion venting structure (20) according to any one of claims 1 to 5, characterized in that, The protective plate (23) is provided with a reinforcing component (231).

7. The explosion venting structure (20) according to claim 6, characterized in that, The reinforcing component (231) includes a plurality of reinforcing ribs (2311), which are disposed on the surface of the protective plate (23) and are arranged in parallel or interlaced to form a grid structure.

8. The explosion venting structure (20) according to any one of claims 1 to 5, wherein the thickness A of the explosion venting piece (22) along the height direction of the explosion venting structure (20) satisfies the relationship: 0.2mm≤A≤0.5mm.

9. The explosion venting structure (20) according to any one of claims 1 to 5, characterized in that, The explosion relief disc (22) is connected to the supporting frame (21) by at least adhesive or welding; and / or, The explosion relief plate (22) and the protective plate (23) are connected by at least adhesive or welding.

10. The explosion venting structure (20) according to claim 9, characterized in that, The explosion relief plate (22) is provided with a first annular welding area (221) and a second annular welding area (222). The first annular welding area (221) is located inside the second annular welding area (222). The first annular welding area (221) is welded to the supporting frame (21), and the second annular welding area (222) is welded to the protective plate (23).

11. The explosion venting structure (20) according to any one of claims 1 to 5, characterized in that, The explosion relief structure (20) further includes a seal (24) connected to the support frame (21) for sealing the gap between the support frame (21) and the intended device.

12. An energy storage device (1), characterized in that, The energy storage device (1) includes the explosion venting structure (20) according to any one of claims 1 to 11.

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