Protective device and energy storage device

Abstract

The application discloses a protection device and an energy storage device, and relates to the technical field of energy storage devices. The protection device comprises a protection structure, the protection structure has a first direction and a second direction perpendicular to each other, the protection structure has a first end and a second end oppositely arranged along the first direction, the first end is suitable for being connected to one side of a venting plate along the second direction, and the second end extends in a direction away from the first end along the first direction; the protection structure can be at least partially deformed under pressure along the second direction to form a gas guide channel extending along the first direction between the venting plate and the protection structure; in this way, after the venting plate vents, gas or even flame will flow along the second direction and impact the protection structure to cause deformation of the protection structure, thereby forming the gas guide channel, and then making the gas or even flame flow along the gas guide channel, so that the flow direction of the gas or even flame after the venting plate vents is changed, the possibility of causing damage to surrounding operators and equipment is reduced, and the safety of the energy storage device is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage devices, and particularly relates to a protection device and an energy storage device. BACKGROUND

[0002] The energy storage device is a modular, movable and integrated energy storage system, which internally integrates a battery pack, a battery management system, a converter, a temperature control system, a fire extinguishing system and the like. An explosion venting plate is usually arranged on the wall of the energy storage device, which can direct pressure relief to avoid the rupture of the container structure when the internal battery is out of control and the pressure in the container body increases suddenly.

[0003] In the related art, the explosion venting plate is usually installed on the side wall of the energy storage device, but when directing pressure relief, the energy during explosion may injure the surrounding operating personnel or cause damage to the surrounding equipment. SUMMARY

[0004] The application aims to provide a protection device and an energy storage device, which can solve the problem that in the related art, the explosion venting plate is usually installed on the side wall of the energy storage device, but when directing pressure relief, the energy during explosion may injure the surrounding operating personnel or cause damage to the surrounding equipment.

[0005] To solve the above technical problems, the application is implemented as follows:

[0006] In a first aspect, the embodiments of the application provide a protection device, comprising: a protection structure, the protection structure having a first direction and a second direction perpendicular to each other, the protection structure having a first end and a second end oppositely arranged along the first direction, the first end being adapted to be connected to one side of an explosion venting plate along the second direction, the second end extending in a direction away from the first end along the first direction; the protection structure being at least partially deformable under pressure to form a gas guiding channel extending along the first direction between the explosion venting plate and the protection structure.

[0007] Optionally, the protection structure comprises a first plate member and a second plate member; the first plate member comprises a middle part and an edge part arranged in a part of a circumference of the middle part, the edge part and a connecting part of the second plate member form the first end, the middle part is deformable under pressure along the second direction to form a first recess; one end of the second plate member is connected to the edge part, the other end of the second plate member extends in a direction away from the first plate member along the first direction to form the second end, the second plate member is deformable under pressure along the second direction to form a second recess, the first recess and the second recess cooperate to form the gas guiding channel.

[0008] Optionally, the protective structure further comprises a reinforcing member arranged on a side of the second plate member away from the edge portion, the reinforcing member being connected with the second plate member to form the first end.

[0009] Optionally, the thickness of the first plate member gradually increases from the center to the edge of the first plate member.

[0010] Optionally, the protective structure further comprises a third direction perpendicular to the first direction and the second direction respectively; the second plate member comprises a connecting portion and a deformation portion, the connecting portion being connected with the edge portion, one end of the deformation portion being connected with the connecting portion, and the other end of the deformation portion extending away from the connecting portion to form the second end, the deformation portion being capable of being deformed under pressure to form the second recess.

[0011] Optionally, one end of the deformation portion towards the connecting portion at least partially overlaps with the intermediate portion; or, one end of the deformation portion towards the connecting portion is connected with the intermediate portion.

[0012] Optionally, the connecting portion is provided with a guide column, the edge portion is provided with a guide hole at a position corresponding to the guide column, the guide column is inserted into the guide hole, and the guide column is movable relative to the guide hole along the third direction during the deformation of the protective structure under pressure.

[0013] Optionally, the edge portion is provided with a guide column, the connecting portion is provided with a guide hole at a position corresponding to the guide column, the guide column is inserted into the guide hole, and the guide column is movable relative to the guide hole along the third direction during the deformation of the protective structure under pressure.

[0014] Optionally, a plurality of guide holes are provided, the plurality of guide holes are arranged at intervals along the first direction, the connecting portion is provided with a guide column at a position corresponding to each guide hole, and the size of the plurality of guide holes along the third direction gradually decreases from the second end to the first end.

[0015] Optionally, in the case that the protective structure is deformed under pressure, the flow passage area of the air guide channel gradually increases from the first end to the second end.

[0016] Optionally, the first plate member and the second plate member are integrally formed, or the first plate member and the second plate member are separately formed.

[0017] Optionally, the elongation of the first plate member is greater than the elongation of the second plate member.

[0018] Optionally, the elongation of the first plate member is ε1, and satisfies: 30%≤ε1≤50%.

[0019] And / or, the ductility of the second plate is ε2, satisfying: 10%≤ε2≤20%.

[0020] Optionally, the tensile strength of the protective structure is σ, satisfying: 300MPa≤σ≤800Mpa.

[0021] In a second aspect, the embodiments of the present application provide an energy storage device, comprising: a box, an explosion vent plate and the protective device as any one of the above, the explosion vent plate is arranged on the side wall of the box, the explosion vent plate can exhaust along the second direction, and the protective structure is arranged on one side of the explosion vent plate along the second direction and connected with the explosion vent plate.

[0022] Optionally, along the first direction, the distance between the protective structure and the nearest edge of the side wall is H1, the height of the side wall along the first direction is H2, satisfying: 1 / 3≤H1 / H2≤1 / 2.

[0023] Optionally, the bonding force between the protective structure and the explosion vent plate is F, the projected area of the explosion vent plate along the second direction is S1, satisfying: 0.02N / mm 2 ≤F / S1≤30N / mm 2 .

[0024] In the embodiments of the present application, the protective device comprises: a protective structure, the protective structure has a first direction and a second direction perpendicular to each other, the protective structure has a first end and a second end arranged opposite along the first direction, the first end is adapted to be connected to one side of the explosion vent plate along the second direction, and the second end extends along the first direction away from the first end; the protective structure is at least partially deformable along the second direction under pressure to form a gas guide channel extending along the first direction between the explosion vent plate and the protective structure; in this way, after the explosion vent plate is vented, the gas or even the flame will flow along the second direction and impact the protective structure to cause it to deform, forming a gas guide channel extending along the first direction between the explosion vent plate and the protective structure, and then making the gas or even the flame flow along the first direction along the gas guide channel, thereby changing the flow direction of the gas or even the flame after the explosion vent plate is vented, reducing the possibility of causing harm to surrounding workers and equipment, and improving the safety of the energy storage device.

[0025] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0027] Figure 1is a schematic view of a protective structure according to an embodiment of the present application from one perspective;

[0028] Figure 2 is a schematic view of a protective structure according to an embodiment of the present application from one perspective;

[0029] Figure 3 is a schematic view of a protective structure according to an embodiment of the present application from another perspective;

[0030] Figure 4 is an exploded view of a protective structure according to an embodiment of the present application;

[0031] Figure 5 is a schematic view of a protective structure according to an embodiment of the present application from another perspective;

[0032] Figure 6 is a schematic view of a protective structure according to an embodiment of the present application when not deformed;

[0033] Figure 7 is a schematic view of a protective structure according to an embodiment of the present application when deformed;

[0034] Figure 8 is a schematic view of an energy storage device according to an embodiment of the present application.

[0035] Reference Signs:

[0036] 1: protective structure; 11: first end; 12: second end; 13: gas guiding passage; 14: first plate member; 141: edge portion; 1411: guide hole; 1412: first mounting hole; 142: middle portion; 1421: first recess; 15: second plate member; 151: second recess; 152: connecting portion; 1521: guide column; 1522: second mounting hole; 153: deformation portion; 16: reinforcing member; 161: third mounting hole; 2: explosion venting plate; 3: box body; 31: side wall; X: first direction; Y: second direction; Z: third direction. DETAILED DESCRIPTION

[0037] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0038] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Before explaining the protective device and energy storage device provided by the embodiments of the present application, the application scenarios of the protective device and energy storage device provided by the embodiments of the present application are described in detail:

[0042] Energy storage devices help to improve energy utilization, balance supply and demand, ensure grid stability, and have other advantages, and are widely used in energy management, power systems, transportation, electronic equipment and other fields. Energy storage devices generally include energy storage containers or energy storage cabinets. A venting plate or venting valve is usually provided on the energy storage device. When the internal battery loses control and causes the pressure inside the box or cabinet to increase suddenly, it can be directed to release pressure to avoid the structure of the box or cabinet from being broken, so as to meet the explosion-proof ventilation requirements of the energy storage device, thereby ensuring the safety of the energy storage device.

[0043] Among the related technologies, one approach is to install a small explosion relief valve on the door of the energy storage device. However, to meet the explosion-proof requirements of the energy storage device, multiple small explosion relief valves are required, which increases the cost of the energy storage device. Another approach is to install a larger explosion relief plate on the top of the energy storage device compared to the explosion relief valve. However, top installation increases the installation difficulty and is prone to problems such as water leakage. Alternatively, an explosion relief plate can be installed on the side wall of the energy storage device. However, when the explosion relief plate is used to release an explosion, gas or even flames may flow out from the weak points of the plate, which can easily pose a safety hazard to surrounding personnel or equipment.

[0044] Therefore, this application provides a protective device and an energy storage device. The protective device and energy storage device provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0045] like Figure 1 As shown, the protective device proposed in some embodiments of this application includes a protective structure 1. The protective structure 1 has a first direction X and a second direction Y that are perpendicular to each other. The protective structure 1 has a first end 11 and a second end 12 that are disposed opposite to each other along the first direction X. The first end 11 is adapted to be connected to one side of the explosion relief plate 2 along the second direction Y, and the second end 12 extends along the first direction X in a direction away from the first end 11. The protective structure 1 is at least partially deformable under pressure to form a gas guiding channel 13 extending along the first direction X between the explosion relief plate 2 and the protective structure 1.

[0046] In this embodiment, the protective structure 1 is at least partially deformable under pressure, so that after the explosion relief plate 2 vents the explosion, the gas or even the flame will flow along the second direction Y and impact the protective structure 1, causing the protective structure 1 to deform and forming a gas guiding channel 13 extending along the first direction X between the explosion relief plate 2 and the protective structure 1. This allows the gas or even the flame to flow along the first direction X along the gas guiding channel 13, thereby changing the flow direction of the gas or even the flame after the explosion relief plate 2 vents the explosion, reducing the possibility of causing harm to surrounding workers and equipment, and improving the safety of the energy storage device.

[0047] Understandably, the protective device of this application can be applied to energy storage devices, and is used to install the explosion relief plate 2 in the energy storage device on the side facing the second direction Y, to prevent gas or even flames from being directly discharged from the explosion relief plate 2 and causing damage to personnel or equipment in front. However, the protective device is not limited to application in energy storage devices. For ease of explanation, the following description uses application in energy storage devices as an example, and the specific application scenario can be flexibly configured.

[0048] It should be noted that the protection structure 1 has a first direction X and a second direction Y perpendicular to each other, the first direction X is the height direction of the protection structure 1, and in actual use, the first direction X is also the height direction of the energy storage device, or the vertical direction; the second direction Y is the thickness direction of the protection structure 1, and in actual use, the second direction Y is the width direction of the energy storage device, which is also the horizontal direction.

[0049] It can be understood that the first direction X and the second direction Y are perpendicular to each other, which can be strictly "perpendicular" in particular, that is, the included angle between the first direction X and the second direction Y is 90°; it can also be "approximately perpendicular", which specifically means that the included angle between the first direction X and the second direction Y contains a certain error, which is within the acceptable deviation range of the specific value determined by the ordinary skilled person in the art considering the measurement and the error related to the measurement of a specific quantity (that is, the limitation of the measurement system); for example, the included angle between the first direction X and the second direction Y is 90°±5°.

[0050] It should be explained that the explosion venting plate 2 is connected and installed with the side wall of the energy storage device along the second direction Y, that is, the plane where the explosion venting plate 2 is located is parallel to the side wall of the energy storage device; when the battery in the energy storage device appears thermal runaway or the like, the internal pressure of the energy storage device increases, and the gas rushes out from the second direction Y through the explosion venting plate 2, that is, the gas or even flame flows out from the side wall of the energy storage device, which is easy to directly cause harm to the operating personnel or equipment, and the protection structure 1 is installed on the side of the explosion venting plate 2 away from the side wall of the energy storage device, when the gas or even flame flows out, it will first impact the protection structure 1 to cause deformation, forming a gas guide channel 13 between the explosion venting plate 2 and the protection structure 1, which can guide the gas or even flame to flow out along the first direction X, that is, guide the gas or even flame to flow out upward, thereby reducing the possibility of causing harm to the operating personnel or equipment, and further improving the safety and reliability of the energy storage device.

[0051] In specific application, as shown in Figure 1 , the first end 11 of the protection structure 1 is connected to one side of the explosion venting plate 2 along the second direction Y, and the second end 12 extends along the first direction X away from the first end 11; so that the part of the protection structure 1 close to the first end 11 is connected with the explosion venting plate 2, and the part close to the second end 12 can be separated from the explosion venting plate 2, thereby when the explosion venting plate 2 is venting, as shown in Figure 2 , the gas or even flame flowing out of the explosion venting plate 2 will first impact the protection structure 1 along the second direction Y away from the explosion venting plate 2, so that the part of the protection structure 1 close to the second end 12 is separated from the explosion venting plate 2; and due to the large impact when the explosion venting plate 2 is venting, the protection structure 1 will further deform, thereby forming the gas guide channel 13 with the open upper end, and the gas or even flame flows out from the upper end.

[0052] It should be noted that in actual application, for example Figure 1 As shown in the state of the protection structure 1 before deformation, at this time, the first end 11 is connected with the explosion venting plate 2, and the second end 12 is attached to the explosion venting plate 2, which can isolate and protect the explosion venting plate 2 from the outside world; as shown in Figure 2 As shown in the state of the protection structure 1 after deformation, at this time, the first end 11 is connected with the explosion venting plate 2, and the lower part of the protection structure 1 is deformed by impact, and the second end 12 is separated from the explosion venting plate 2 by impact, and the upper part of the protection structure 1 is deformed by impact when the gas or even flame flows out, so that the gas or even flame flows out from the upper end, reducing the situation that the gas or even flame flows out along the second direction Y and directly impacts the operating personnel and equipment.

[0053] Understandably, when the internal battery of the energy storage device loses control and causes the pressure in the box or cabinet to increase suddenly, the gas flowing out from the explosion venting plate 2 may contain not only gas but also flame, etc., so the protection structure 1 has a high melting point, and the specific melting point can be set by the person skilled in the art according to actual needs, for example: the protection structure 1 is made of stainless steel, or the protection structure 1 is made of aluminum alloy, etc., which will not be melted and deformed by the flame when the explosion venting plate 2 vents out the flame.

[0054] As shown in Figure 3 In some embodiments of the present application, the protection structure 1 includes a first plate 14 and a second plate 15; the first plate 14 includes an edge portion 141 arranged part of the circumference of the middle portion 142, and the edge portion 141 and the connected part of the second plate 15 form the first end 11, and the middle portion 142 can be deformed along the second direction Y to form a first recess 1421; one end of the second plate 15 is connected with the edge portion 141, and the other end of the second plate 15 extends along the first direction X to form the second end 12, and the second plate 15 can be deformed along the second direction Y to form a second recess 151, and the first recess 1421 and the second recess 151 cooperate to form the gas guide channel 13.

[0055] In the embodiment of the present application, the edge portion 141 in the first plate member 14 and the connecting portion of the second plate member 15 form the first end 11, so that the first plate member 14 and the second plate member 15 can be connected with the explosion venting plate 2, thereby realizing the reliability of the connection; and the middle portion 142 can be deformed to form the first recess 1421 under pressure along the second direction Y, and the second plate member 15 can be deformed to form the second recess 151 under pressure along the second direction Y, so that the first recess 1421 and the second recess 151 cooperate to form the gas guide channel 13 to guide the gas or even flame out of the first direction X during the explosion venting. The first recess 1421 can provide space for the gas or even flame during the explosion venting, and the second recess 151 can guide the gas or even flame out of the upper end, thereby reducing the damage to the operating personnel and equipment caused by the direct flow of the gas or even flame along the second direction Y.

[0056] In a specific application, as shown in Figure 3 , the first plate member 14 and the second plate member 15 are at least partially stacked along the second direction Y, so that they can be connected together with the explosion venting plate 2 by welding, bolt connection, adhesion or the like. Those skilled in the art can select according to the actual situation, as long as the reliability of the connection can be ensured, which is not limited in the present application.

[0057] It should be noted that, as shown in Figure 4 , in actual application, the circumferential edge of the first plate member 14 forms a "U-shaped" region connected with the second plate member 15, thereby forming the first end 11, which improves the connection reliability of the first plate member 14, the second plate member 15 and the explosion venting plate 2. As shown in Figure 4 , the middle portion 142 of the first plate member 14 can be impacted by the gas or even flame to form the first recess 1421 during the explosion venting of the explosion venting plate 2, so that the outflowing gas or even flame has a certain accommodation space. At the same time, the gas or even flame impacts the second plate member 15 to form the second recess 151. Since the second end 12 formed by the second plate member 15 extending along the first direction X is not connected with the explosion venting plate 2, the end of the second plate member 15 away from the first plate member 14 is separated from the explosion venting plate 2 under the impact of the gas or even flame, forming the outlet of the gas guide channel 13, so that the gas or even flame entering the first recess 1421 and the second recess 151 flows out of the outlet.

[0058] It should be explained that, in actual application, as shown in Figure 4 , the first plate member 14 is specifically installed on the lower half of the explosion venting plate 2, and the second plate member 15 is installed on the upper half of the explosion venting plate 2, that is, along the first direction X, the first plate member 14 and the second plate member 15 are both connected with the outer periphery of the lower half of the explosion venting plate 2. As shown in Figure 5As shown, the edge portion 141 of the first plate member 14 is provided with a first mounting hole 1412, and the second plate member 15 is provided with a second mounting hole 1522. The first mounting hole 1412 and the second mounting hole 1522 are connected to the outer periphery of the lower half of the explosion venting plate 2 through bolts. The specific number of bolts can be set according to actual needs to ensure the reliability of the connection and reduce the possibility of the protective structure 1 being separated by impact.

[0059] As shown in the drawings, Figure 5 In some embodiments of the present application, the protective structure 1 further comprises a reinforcing member 16. The reinforcing member 16 is arranged on the side of the second plate member 15 away from the edge portion 141, and the reinforcing member 16 is connected to the second plate member 15 to form the first end 11.

[0060] In the embodiments of the present application, the reinforcing member 16 is arranged on the side of the second plate member 15 away from the edge portion 141, and the reinforcing member 16 is connected to the second plate member 15 to form the first end 11. Thus, in the second direction Y, the explosion venting plate 2, the reinforcing member 16, the second plate member 15, and the first plate member 14 are stacked in sequence to ensure the connection reliability of the protective structure 1 and the explosion venting plate 2. That is, the structural strength of the first end 11 is improved by the reinforcing member 16, thereby ensuring the connection reliability.

[0061] In specific applications, the reinforcing member 16 can be connected to the second plate member 15 by welding, bolting, bonding, or the like. As shown in the drawings, Figure 5 The reinforcing member 16 is provided with a third mounting hole 161 corresponding to the second mounting hole 1522, so that the bolts can be sequentially passed through the first mounting hole 1412, the second mounting hole 1522, and the third mounting hole 161 to connect the reinforcing member 16 to the explosion venting plate 2. In actual operation, the circumferential edge of the explosion venting plate 2 is also provided with a through hole corresponding to the third mounting hole 161, so that the operator can simultaneously fix and install the first plate member 14, the second plate member 15, the reinforcing member 16, and the explosion venting plate 2 on the side wall of the energy storage device, improving the convenience of installation.

[0062] As shown in the drawings, Figure 5 In some embodiments of the present application, the thickness of the first plate member 14 gradually increases from the center to the edge of the first plate member 14.

[0063] In the embodiments of the present application, the thickness of the first plate member 14 gradually increases from the center to the edge of the first plate member 14. Thus, the thickness of the edge of the first plate member 14 is greater, and the structural strength is higher, ensuring the connection reliability of the first plate member 14. Moreover, the center of the first plate member 14 is more easily formed, and the first recess 1421 can be formed more quickly under the impact of gas or even flame to accommodate the gas or even flame flowing out during explosion venting.

[0064] In a specific application, the explosion venting plate 2 is impacted and opened preferentially at the middle area when venting, so that the gas or even flame flows out from the middle area and impacts the center of the first plate 14 in the second direction Y. The thickness of the center of the first plate 14 is set to be smaller, so that the center of the first plate 14 is more likely to be deformed, and the thickness of the edge portion 141 is larger and has higher structural strength. Meanwhile, since the first plate 14 is arranged at the lower half of the explosion venting plate 2, the upper end of the first plate 14 is impacted more, so that the first plate 14 is formed into the first recess 1421 with a large upper part and a small lower part after being impacted, which is more conducive to the outflow of the gas or even flame.

[0065] It should be explained that, in actual application, the first plate 14 includes the edge portion 141 and the middle portion 142, the thickness of the middle portion 142 is smaller and is more likely to be deformed after being impacted, and the thickness of the edge portion 141 is larger and has higher structural strength, so as to ensure the reliability during connection.

[0066] As shown in the drawings, Figure 5 In some embodiments of the present application, the protection structure 1 further includes a third direction Z perpendicular to the first direction X and the second direction Y, the second plate 15 includes a connecting portion 152 and a deformation portion 153, the connecting portion 152 is connected with the edge portion 141, one end of the deformation portion 153 is connected with the connecting portion 152, and the other end extends away from the connecting portion 152 to form the second end 12, and the deformation portion 153 can be deformed under pressure to form the second recess 151.

[0067] In the embodiments of the present application, the connecting portion 152 is connected with the edge portion 141 to connect the second plate 15 with the first plate 14, the deformation portion 153 extends in the first direction X, one end of the deformation portion 153 is connected with the connecting portion 152, and the other end extends in the first direction X and is separated from the explosion venting plate 2, so that the deformation portion 153 can be deformed under pressure to form the second recess 151, and an outlet can be formed at the end of the deformation portion 153 away from the connecting portion 152 to lead out the gas or even flame in the second recess 151.

[0068] It should be noted that the third direction Z specifically refers to the width direction of the protection structure 1, and in actual use, the third direction Z is also the length direction of the protection device.

[0069] In a specific application, as shown in the drawings, Figure 5As shown, the connecting portion 152 is provided with two, and the two connecting portions 152 are arranged on both sides of the deformation portion 153 along the third direction Z, thereby facilitating connection with the edge portion 141 in the "U" shape. The deformation portion 153 is above the first plate 14 along the first direction X, and the deformation portion 153 is not connected with the explosion venting plate 2. In actual use, the deformation portion 153 is located in the upper half of the explosion venting plate 2, and the gas or even flame flowing out of the explosion venting plate 2 impacts the deformation portion 153, so that the deformation portion 153 is separated from the explosion venting plate 2 and deforms to form the second recess 151.

[0070] As shown, in some embodiments of the present application, the deformation portion 153 at least partially overlaps the intermediate portion 142 towards one end of the connecting portion 152; or, the deformation portion 153 is connected with the intermediate portion 142 towards one end of the connecting portion 152. Figure 5

[0071] In the embodiments of the present application, the deformation portion 153 at least partially overlaps the intermediate portion 142 towards one end of the connecting portion 152, thereby facilitating the deformation portion 153 and the intermediate portion 142 to have the same deformation amount when impacted, and without the need for additional connection, facilitating processing; or, the deformation portion 153 is connected with the intermediate portion 142 towards one end of the connecting portion 152, thereby enabling the deformation portion 153 and the intermediate portion 142 to have the same deformation, and further enabling the gas guide channel 13 to be smoother, facilitating the gas or even flame to flow out; and without the gap between the deformation portion 153 and the intermediate portion 142 due to different deformation amounts when the gas or even flame impacts the deformation portion 153 and the intermediate portion 142, causing the gas or even flame to flow out from the gap.

[0072] In specific applications, the deformation portion 153 at least partially overlaps the intermediate portion 142 towards one end of the connecting portion 152, and when the explosion venting plate 2 vents, the intermediate portion 142 deforms away from the explosion venting plate 2 after being impacted, and the deformation portion 153 at least partially overlaps the intermediate portion 142, thereby the deformed part of the intermediate portion 142 pushes the deformation portion 153 to deform.

[0073] When the deformation portion 153 is connected with the intermediate portion 142 towards one end of the connecting portion 152, the deformation amount of the two when impacted is the same, and without the gap, avoiding the situation that the gap is caused due to the excessive impact energy of the gas or even flame, and the different deformation amounts of the two, thereby ensuring the accurate discharge of the gas or even flame when venting.

[0074] It can be understood that the deformation portion 153 is connected with the intermediate portion 142 towards one end of the connecting portion 152, which can be welding, bolt connection, bonding or the like, and those skilled in the art can set it according to the actual situation, and the present application does not limit it.

[0075] As​Figure 5 As shown in some embodiments of the present application, the connecting portion 152 is provided with a guide column 1521, the edge portion 141 is provided with a guide hole 1411 at a position corresponding to the guide column 1521, and the guide column 1521 is inserted into the guide hole 1411. During the deformation of the protective structure 1 under pressure, the guide column 1521 can move along the third direction Z relative to the guide hole 1411.

[0076] In the embodiments of the present application, the guide column 1521 on the connecting portion 152 is inserted into the guide hole 1411 on the edge portion 141, thereby facilitating the connection and installation of the second plate 15 and the first plate 14. Meanwhile, during the deformation of the protective structure 1 under pressure, the guide column 1521 can move along the third direction Z relative to the guide hole 1411, so that when the second plate 15 is deformed under impact, the guide column 1521 can exert a pulling force along the third direction Z on the guide hole 1411, thereby reducing the deformation of the first plate 14 and reducing the possibility of rupture of the first plate 14 under excessive impact.

[0077] In specific applications, as shown in the drawings, Figure 5 The connecting portion 152 is provided with a guide column 1521 on the side facing the edge portion 141, and the edge portion 141 is provided with a guide hole 1411 at a position corresponding to the guide column 1521. The guide column 1521 is inserted into the guide hole 1411, thereby guiding the installation of the first plate 14 and the second plate 15.

[0078] In some embodiments of the present application, the edge portion 141 is provided with a guide column, and the connecting portion 152 is provided with a guide hole at a position corresponding to the guide column. The guide column is inserted into the guide hole, and during the deformation of the protective structure 1 under pressure, the guide column can move along the third direction Z relative to the guide hole.

[0079] In the embodiments of the present application, the edge portion 141 can also be provided with a guide column on the side facing the connecting portion 152, and the connecting portion 152 can be provided with a guide hole at a position corresponding to the guide column, thereby guiding the installation of the first plate 14 and the second plate 15. Meanwhile, when the second plate is deformed under impact, the guide column can exert a pulling force along the third direction Z on the guide hole, thereby reducing the deformation of the first plate 14 and reducing the possibility of rupture of the first plate 14 under excessive impact.

[0080] In specific applications, the guide columns and guide holes provided on the edge portion 141 and the connecting portion 152 can also replace the original mounting holes and bolts to connect the first plate 14 and the second plate 15 together.

[0081] As shown in the drawings, Figure 5As shown, in some embodiments of the present application, the guide holes 1411 are provided in plurality, the plurality of guide holes 1411 are arranged in intervals along the first direction X, and the connecting portion 152 is provided with a guide column 1521 at a corresponding position of each guide hole 1411. From the second end 12 to the first end 11, the plurality of guide holes 1411 gradually decrease in size along the third direction Z.

[0082] In the embodiments of the present application, from the second end 12 to the first end 11, the plurality of guide holes 1411 gradually decrease in size along the third direction Z, as shown in the figure. Figure 5 As shown, the size of the guide hole 1411 gradually decreases along the first direction X, that is, from top to bottom, and then when the first plate 14 is deformed under impact, the abutting time of the plurality of guide columns 1521 from top to bottom and the corresponding guide holes 1411 is different, that is, the abutting time of the guide column 1521 closer to the upper end and the corresponding guide hole 1411 is later, so that the guide column 1521 closer to the upper end exerts a pulling force on the guide hole 1411 for a later time, thereby making the lower end of the first plate 14 be pulled by the guide column 1521 earlier, and the deformation amount is smaller, and then forming a first recess 1421 with a large upper end and a small lower end, thereby facilitating the outflow of gas or even flame.

[0083] In specific applications, the plurality of guide holes 1411 can be specifically provided as 3, 4, 5, 6, etc. Any number of values can be set by those skilled in the art according to actual conditions, and the present application does not limit this.

[0084] It should be noted that from the second end 12 to the first end 11, the size of the guide hole 1411 gradually decreases along the third direction Z, that is, from top to bottom, the guide hole 1411 is an “elliptical hole or strip-shaped hole”, the major axis of the plurality of guide holes 1411 gradually decreases, or the length along the third direction Z gradually decreases, for example: the guide hole 1411 at the upper end is a strip-shaped hole, and the guide hole 1411 at the lower end is a circular hole; those skilled in the art can set it according to actual conditions, and the present application does not limit this.

[0085] As shown in the figure, Figure 5 In the case of deformation of the protective structure 1 under pressure, the flow area of the gas guide channel 13 increases from the first end 11 to the second end 12.

[0086] In the embodiments of the present application, the flow area of the air guide channel 13 increases from the first end 11 to the second end 12, so that the air guide channel 13 has a large upper part and a small lower part. The flow area of the air guide channel 13 at the first end 11 is relatively small, which can reduce the risk of air inflow and flame downward spread or backflow to a certain extent, and can better withstand the impact of gas or even flame and reduce the risk of deformation. The flow area of the air guide channel 13 at the second end 12 is relatively large, so that the gas or even flame flowing into the air guide channel 13 has enough discharge space, which reduces the pressure of the discharged gas and reduces the possibility of causing harm to the outside.

[0087] It should be noted that the flow area of the air guide channel 13 increases from the first end 11 to the second end 12, which can be increased by gradient or irregularly, as long as the air guide channel 13 forms a large upper part and a small lower part, so as to reduce the air flow resistance and reduce the possibility of turbulence and pressure rebound caused by sudden expansion.

[0088] As shown in Figure 5 In some embodiments of the present application, the first plate 14 and the second plate 15 are integrally formed, or the first plate 14 and the second plate 15 are separately formed.

[0089] In the embodiments of the present application, the first plate 14 and the second plate 15 are integrally formed, so that the installation is facilitated without the need for welding or bolt connection of the first plate 14 and the second plate 15. When the first plate 14 and the second plate 15 are separately formed, the materials of the first plate 14 and the second plate 15 can be different, which facilitates processing and improves processing efficiency.

[0090] In specific applications, the first plate 14 and the second plate 15 can be a piece of plate body processed by sheet metal.

[0091] It can be understood that the materials of the first plate 14 and the second plate 15 can be stainless steel, aluminum, aluminum alloy, steel, etc., as long as the structural strength requirement after the processing of the protective structure 1 is met, and the person skilled in the art can set it according to the actual demand, which is not limited in the present application.

[0092] In some embodiments of the present application, the elongation of the first plate 14 is greater than the elongation of the second plate 15.

[0093] In the embodiments of the present application, the first plate 14 has a greater ductility than the second plate 15, so that the first plate 14 and the second plate 15 can deform at the same time, and the deformed portion 153 of the second plate 15 is not connected to the explosion venting plate 2, so that the gas guiding channel 13 with a large upper part and a small lower part can be formed, and the deformed portion 153 of the second plate 15 will not be deformed too much, and the gas or flame will not be ejected in the lateral direction.

[0094] In a specific application, as shown in Figure 6 the first plate 14 can be made of an aluminum alloy, and the second plate 15 can be made of stainless steel, and the deformed portion 153 partially overlaps the intermediate portion 142 at one end of the connecting portion 152, so that when the intermediate portion 142 is deformed to form the first recess 1421 under impact, the intermediate portion 142 will be deformed towards the deformed portion 153 and be constrained by the deformed portion 153 with a lower ductility, so that a gap will not be formed between the deformed portion 153 at one end of the connecting portion 152 and the intermediate portion 142, the possibility of gas or flame being ejected in the lateral direction (in the second direction Y) is reduced, and the safety of the protective device is improved.

[0095] In some embodiments of the present application, the first plate 14 has a ductility ε1, and the following condition is met: 30%≤ε1≤50%.

[0096] In the embodiments of the present application, the ductility ε1 of the first plate 14 is within a reasonable range, so that the first recess 1421 formed by the deformation of the first plate 14 under impact during explosion venting is within a predetermined range, and the deformation is not too large or too small.

[0097] It should be explained that when the ductility ε1 of the first plate 14 is less than 30%, the volume of the first recess 1421 formed by the deformation of the first plate 14 under impact is too small, so that the gas or flame flowing out during explosion venting has not enough space to flow, and the gas or flame may flow back; and when the ductility ε1 of the first plate 14 is greater than 50%, the volume of the first recess 1421 formed by the deformation of the first plate 14 under impact is too large, so that too much gas or flame is in the first recess 1421 during explosion venting, which is not conducive to the outflow of the gas or flame.

[0098] In a specific application, the ductility ε1 of the first plate 14 can be set to 30%, 32%, 34%, 36%, 38%, 40%, 45%, 50%, or any value or a range between any two values.

[0099] It should be noted that the ductility of the first plate 14 and the second plate 15 can be detected by a tensile test, which is a prior art and will not be described here.

[0100] In some embodiments of the present application, the second plate member 15 has an elongation rate ε2, which satisfies: 10%≤ε2≤20%.

[0101] In the embodiments of the present application, by setting the elongation rate ε2 of the second plate member 15 within a reasonable range, it is ensured that the first recess 1421 caused by the impact deformation of the first plate member 14 is within a preset range during the explosion relief, and that the deformation is not too large, so that the gas or even the flame flows out laterally, or the deformation is too small, so that the gas or even the flame cannot be efficiently discharged.

[0102] It should be explained that when the elongation rate ε2 of the second plate member 15 is less than 10%, the volume of the second recess 151 caused by the impact deformation of the second plate member 15 is too small, so that the gas or even the flame flowing out during the explosion relief does not have enough space to flow, and the backflow may occur. When the elongation rate ε2 of the second plate member 15 is greater than 20%, the deformation of the second plate member 15 caused by the impact is too large, so that the gas or even the flame flows out laterally (in the second direction Y) during the explosion relief, which is easy to cause harm to the surrounding operating personnel or equipment.

[0103] In specific applications, the elongation rate ε2 of the second plate member 15 can be set to 10%, 12%, 14%, 16%, 18%, 20%, or any value or range between any two values.

[0104] As shown in FIG. 1, Figure 7 In some embodiments of the present application, the protective structure 1 has a tensile strength σ, which satisfies: 300MPa≤σ≤800Mpa.

[0105] In the embodiments of the present application, by setting the tensile strength σ of the protective structure 1 within a reasonable range, it is ensured that the integrity of the protective structure is guaranteed during the explosion relief, and the risk of the protective structure 1 being torn by the impact of the gas or even the flame and causing the fragments to splash is reduced.

[0106] It should be explained that when the tensile strength σ of the protective structure 1 is less than 300Mpa, the tensile strength of the protective structure 1 is too small, and the protective structure 1 may be torn by the impact of the gas or even the flame during the explosion relief, which cannot change the flow direction of the gas or even the flame, and may cause other damage due to the splashing of the fragments. When the tensile strength σ of the protective structure 1 is greater than 800Mpa, the tensile strength of the protective structure 1 is too large, which causes excessive redundancy of the tensile strength σ of the protective structure 1, and the material requirement of the protective structure 1 is too high, resulting in high cost.

[0107] In specific applications, the tensile strength σ of the protective structure 1 can be set to 300Mpa, 400Mpa, 500Mpa, 600Mpa, 700Mpa, 800Mpa, or any value or range between any two values.

[0108] In a specific application, the tensile strength σ of the protection structure 1 can be tested by a static axial tensile test on the material of the first plate 14 or the second plate 15, a dynamic impact tensile test on the connecting part of the first plate 14 and the second plate 15, or a transverse tensile test on the welding strength between the first plate 14 and the second plate 15. The static axial tensile test, the dynamic impact tensile test and the transverse tensile test are all conventional tensile strength test methods, which will not be described here.

[0109] As shown in Figure 8 In some embodiments of the present application, an energy storage device is also provided, which comprises a box body 3, a venting plate 2 and the protection device as described in any of the above embodiments. The venting plate 2 is arranged on the side wall 31 of the box body 3 and can exhaust gas in the second direction Y. The protection structure 1 is arranged on one side of the venting plate 2 in the second direction Y and connected with the venting plate 2.

[0110] In the embodiments of the present application, the protection structure 1 is arranged on one side of the venting plate 2 in the second direction Y and connected with the venting plate 2. Therefore, when the venting plate 2 is venting, the gas exhausted from the venting plate 2 in the second direction Y can impact the protection structure 1 to make it deform, and then form a gas guide channel 13 extending in the first direction X, so that the gas or even the flame can be exhausted upward along the gas guide channel 13, thereby reducing the possibility of damage to the surrounding workers and equipment.

[0111] In a specific application, the energy storage device can be an energy storage container or an energy storage cabinet, etc. The venting plate 2 can be arranged on the side wall 31 of the box body 3. The side wall 31 can be a side wall in the length direction of the box body 3 or a side wall in the width direction of the box body 3. Those skilled in the art can arrange it according to actual needs, which is not limited in the present application.

[0112] As shown in Figure 8 In some embodiments of the present application, the distance between the protection structure 1 and the nearest edge of the side wall 31 in the first direction X is H1, and the height of the side wall 31 in the first direction X is H2, which satisfies: 1 / 3≤H1 / H2≤1 / 2.

[0113] In the embodiments of the present application, by setting the ratio H1 / H2 between the distance H1 between the protection structure 1 and the nearest edge of the side wall 31 and the height H2 of the side wall 31 in the first direction X within a reasonable range, the protection structure 1 can be installed at a reasonable height, so that the gas or even the flame flowing out of the outlet of the gas guide channel 13 of the protection structure 1 is not easy to damage the surrounding workers during venting, thereby improving the safety of the protection device.

[0114] It should be noted that the distance H1 between the protective structure 1 and the closest edge of the side wall 31 along the first direction X specifically refers to the height between the second end 12 of the protective structure 1 and the upper edge of the side wall 31. In actual measurement, the distance between the second end 12 of the protective structure 1 and the upper edge of the side wall 31 is measured by a ruler or the like.

[0115] It should be explained that when the ratio H1 / H2 between the distance H1 between the protective structure 1 and the closest edge of the side wall 31 along the first direction X and the height H2 of the side wall 31 along the first direction X is H1 / H2<1 / 3, that is, the installation position of the protective structure 1 is too high, it is not convenient to install the protective structure 1; and when the ratio H1 / H2 between the distance H1 between the protective structure 1 and the closest edge of the side wall 31 along the first direction X and the height H2 of the side wall 31 along the first direction X is H1 / H2>1 / 2, that is, the installation position of the protective structure 1 is too low, the gas or even the flame flowing out of the cavity opening 101 is easy to damage the surrounding workers during the explosion relief.

[0116] The ratio H1 / H2 between the distance H1 between the protective structure 1 and the closest edge of the side wall 31 along the first direction X and the height H2 of the side wall 31 along the first direction X can be set to 1 / 3, 2 / 5, 1 / 2, or any other value or a range between any two values.

[0117] It can be understood that in actual use, the side wall 31 of the protective structure 1 is generally 2.5m-4.5m, and when the installation position of the protective structure 1 is too low, that is, the position of the outlet of the gas guide channel 13 is too low, the discharged gas or even the flame is easy to cause damage to the surrounding workers during the explosion relief.

[0118] As shown in FIG. 1, ​ In some embodiments of the present application, the binding force between the protective structure 1 and the explosion relief plate 2 is F, the orthogonal projection area of the explosion relief plate 2 along the second direction Y is S3, and 0.02N / mm 2 ≤F / S3≤30N / mm 2 .

[0119] In the embodiments of the present application, by setting the ratio F / S3 between the binding force F between the protective structure 1 and the explosion relief plate 2 and the orthogonal projection area S3 of the explosion relief plate 2 within a reasonable range, the situation that the gas or even the flame flowing out of the explosion relief plate 2 impacts and separates the protective structure 1 during the explosion relief can be reduced, and the connection stability and reliability of the protective structure 1 are ensured.

[0120] It should be noted that in actual use, the binding force F between the protective structure 1 and the explosion relief plate 2 can specifically represent the connection strength between the protective structure 1 and the explosion relief plate 2, which in actual use can specifically be the welding strength between the protective structure 1 and the explosion relief plate 2, or the bolt pretightening force between the protective structure 1 and the explosion relief plate 2.

[0121] It needs to be explained that when the ratio F / S3 between the binding force F between the protective structure 1 and the explosion venting plate 2 and the orthogonal projection area S3 of the explosion venting plate 2 is F / S3<0.02 N / mm 2 , that is, the binding force F between the protective structure 1 and the explosion venting plate 2 is too small, so that the protective structure 1 cannot withstand the impact of gas or even flame during explosion venting, so that the protective structure 1 is separated, so that precise explosion venting cannot be achieved; and when the ratio F / S3 between the binding force F between the protective structure 1 and the explosion venting plate 2 and the orthogonal projection area S3 of the explosion venting plate 2 is F / S3>30 N / mm 2 , that is, the binding force F between the protective structure 1 and the explosion venting plate 2 is too large, causing redundancy, which in actual use is embodied as too many bolts, etc., resulting in high cost, complex installation, etc.

[0122] In specific application, the ratio F / S3 between the binding force F between the protective structure 1 and the explosion venting plate 2 and the orthogonal projection area S3 of the explosion venting plate 2 can be set to 0.02 N / mm 2 , 1 N / mm 2 , 5 N / mm 2 , 10 N / mm 2 , 15 N / mm 2 , 20 N / mm 2 , 22 N / mm 2 , 25 N / mm 2 , 28 N / mm 2 , 30 N / mm 2 , etc. or a range between any two arbitrary values.

[0123] It can be understood that the binding force F between the protective structure 1 and the explosion venting plate 2, in actual use, refers to the connection strength between the protective structure 1 and the explosion venting plate 2, and when the protective structure 1 is connected with the side wall 31, it can also be the binding force between the protective structure 1 and the side wall 31; in actual use, the protective structure 1 and the explosion venting plate 2 or the side wall 31 are connected by bolts, so that the size of the binding force F can be obtained by measuring the pre-tightening force of the bolts and the number of the bolts, and then calculating the product of the pre-tightening force of the bolts and the number of the bolts; in actual use, the number of bolts can be designed to adjust the binding force F, thereby facilitating the simplification of the number of bolts and the reduction of cost.

[0124] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. It is emphasized that each of these terms refers to a specific feature, structure, material or characteristic described in connection with a particular embodiment or example. The descriptive terms are not necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0125] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application is defined with respect to the appended claims.

Claims

1. A protective device, characterized in that, include: The protective structure (1) has a first direction (X) and a second direction (Y) that are perpendicular to each other. The protective structure (1) has a first end (11) and a second end (12) that are disposed opposite to each other along the first direction (X). The first end (11) is adapted to be connected to one side of the explosion relief plate (2) along the second direction (Y). The second end (12) extends along the first direction (X) in a direction away from the first end (11). The protective structure (1) is at least partially deformable under pressure to form a gas channel (13) extending along the first direction (X) between the explosion relief plate (2) and the protective structure (1); The protective structure (1) includes a first plate (14) and a second plate (15). The first plate (14) includes a middle portion (142) and an edge portion (141) circumferentially disposed around the middle portion (142). The edge portion (141) and the second plate (15) are connected to form the first end (11). The middle portion (142) can be deformed under pressure along the second direction (Y) to form a first recess (1421). One end of the second plate (15) is connected to the edge portion (141), and the other end of the second plate (15) extends in the first direction (X) away from the first plate (14) to form the second end (12). The second plate (15) can be deformed by pressure in the second direction (Y) to form the second recess (151). The first recess (1421) and the second recess (151) cooperate to form the air guide channel (13).

2. The protective device according to claim 1, characterized in that, The protective structure (1) further includes a reinforcing member (16), which is disposed on the side of the second plate (15) away from the edge portion (141). The reinforcing member (16) is connected to the second plate (15) to form the first end (11).

3. The protective device according to claim 1, characterized in that, The thickness of the first plate (14) gradually increases from the center to the edge.

4. The protective device according to claim 1, characterized in that, The protective structure (1) further includes a third direction (Z), which is perpendicular to the first direction (X) and the second direction (Y) respectively; The second plate (15) includes a connecting portion (152) and a deformable portion (153). The connecting portion (152) is connected to the edge portion (141). One end of the deformable portion (153) is connected to the connecting portion (152), and the other end extends away from the connecting portion (152) to form the second end (12). The deformable portion (153) can be deformed under pressure to form the second recess (151).

5. The protective device according to claim 4, characterized in that, The deformable part (153) at one end facing the connecting part (152) at least partially overlaps with the middle part (142); Alternatively, one end of the deformable part (153) facing the connecting part (152) is connected to the middle part (142).

6. The protective device according to claim 4, characterized in that, The connecting part (152) is provided with a guide post (1521), and the edge part (141) is provided with a guide hole (1411) at a position corresponding to the guide post (1521). The guide post (1521) is inserted into the guide hole (1411). During the process of the protective structure (1) being deformed by pressure, the guide post (1521) can move relative to the guide hole (1411) along the third direction (Z). Alternatively, the edge portion (141) is provided with a guide post, and the connecting portion (152) is provided with a guide hole at a position corresponding to the guide post. The guide post is inserted into the guide hole, and during the process of the protective structure (1) being deformed under pressure, the guide post can move relative to the guide hole along the third direction (Z).

7. The protective device according to claim 6, characterized in that, The guide holes (1411) are provided in multiple ways, and the multiple guide holes (1411) are arranged at intervals along the first direction (X). The connecting part (152) provides a guide post (1521) at the corresponding position of each guide hole (1411). From the second end (12) to the first end (11), the size of the multiple guide holes (1411) gradually decreases along the third direction (Z).

8. The protective device according to any one of claims 1-7, characterized in that, When the protective structure (1) is deformed under pressure, the cross-sectional area of ​​the air guide channel (13) increases from the first end (11) to the second end (12).

9. The protective device according to any one of claims 1-7, characterized in that, The first plate (14) and the second plate (15) are integrally formed parts, or the first plate (14) and the second plate (15) are separate formed parts.

10. The protective device according to any one of claims 1-7, characterized in that, The elongation of the first plate (14) is greater than that of the second plate (15).

11. The protective device according to claim 10, characterized in that, The elongation of the first plate (14) is ε1, which satisfies: 30%≤ε1≤50%; And / or, the elongation of the second plate (15) is ε2, which satisfies: 10%≤ε2≤20%.

12. The protective device according to claim 1, characterized in that, The tensile strength of the protective structure (1) is σ, which satisfies: 300MPa≤σ≤800Mpa.

13. An energy storage device, characterized in that, include: The enclosure (3), the explosion relief plate (2), and the protective device as described in any one of claims 1-12, wherein the explosion relief plate (2) is disposed on the side wall (31) of the enclosure (3), the explosion relief plate (2) is capable of venting along the second direction (Y), and the protective structure (1) is disposed on one side of the explosion relief plate (2) along the second direction (Y) and connected to the explosion relief plate (2).

14. The energy storage device according to claim 13, characterized in that, Along the first direction (X), the distance between the protective structure (1) and the nearest edge of the sidewall (31) is H1, and the height of the sidewall (31) along the first direction (X) is H2, satisfying: 1 / 3≤H1 / H2≤1 / 2.

15. The energy storage device according to claim 13, characterized in that, The bonding force between the protective structure (1) and the explosion relief plate (2) is F. Along the second direction (Y), the projected area of ​​the explosion relief plate (2) is S1, satisfying: 0.02 N / mm². 2 ≤F / S1≤30N / mm 2 .

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