Protective device and energy storage device

Abstract

The invention 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 is provided with a first direction and a second direction which are perpendicular to each other, the protection structure is provided with a first end and a second end which are oppositely arranged in the first direction, the first end is suitable for being connected to the side, in the second direction, of the explosion venting plate, and the second end extends in the direction away from the first end in the first direction; at least part of the protection structure can be pressed and deformed in the second direction, so that a gas guide channel extending in the first direction is formed between the explosion venting plate and the protection structure; thus, after explosion venting of the explosion venting plate, gas and even flames can flow in the second direction and impact the protection structure to deform the protection structure to form the gas guide channel, then the gas and even flames flow along the gas guide channel, and therefore the flow direction of the gas and even flames after explosion venting of the explosion venting plate is changed; the possibility of hurting surrounding operators and equipment is reduced, and the safety of the energy storage device is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of energy storage devices, and specifically relates to a protective device and an energy storage device. Background Art

[0002] An energy storage device is a modular, mobile, integrated energy storage system that integrates battery packs, a battery management system, an inverter, a temperature control system, a fire protection system, and more. Explosion vents are typically installed on the walls of the energy storage device. If the internal battery outage causes a sudden increase in internal pressure, this venting provides targeted pressure relief to prevent structural rupture.

[0003] In the related art, explosion relief panels are usually installed on the side walls of energy storage devices. However, during directional pressure relief, the energy from the explosion relief may accidentally injure surrounding workers or damage surrounding equipment. Summary of the Invention

[0004] The present application aims to provide a protective device and an energy storage device that can solve the problem in related technologies that explosion relief plates are usually installed on the side walls of the energy storage device, but during directional pressure relief, the energy during explosion relief can easily injure surrounding workers or cause damage to surrounding equipment.

[0005] In order to solve the above technical problems, this application is implemented as follows: In a first aspect, an embodiment of the present application proposes a protective device, comprising: a protective structure, the protective structure having a first direction and a second direction perpendicular to each other, the protective structure having a first end and a second end relatively arranged along the first direction, the first end being suitable for connecting to one side of the explosion-relief plate along the second direction, and the second end extending along the first direction toward a direction away from the first end; the protective structure is at least partially capable of being deformed under pressure to form an air guide channel extending along the first direction between the explosion-relief plate and the protective structure.

[0006] Optionally, the protective structure includes a first plate and a second plate; the first plate includes a middle portion and an edge portion partially circumferentially arranged around the middle portion, the edge portion and the connecting portion of the second plate form the first end, and the middle portion can be compressed and deformed along the second direction to form a first recess; one end of the second plate is connected to the edge portion, and the other end of the second plate extends along the first direction toward away from the first plate to form the second end, the second plate can be compressed and deformed along the second direction to form a second recess, and the first recess and the second recess cooperate to form the air guide channel.

[0007] Optionally, the protective structure further includes a reinforcement member, which is provided on a side of the second plate member away from the edge portion, and the reinforcement member is connected to the second plate member to form the first end.

[0008] Optionally, the thickness of the first plate gradually increases from the center to the edge of the first plate.

[0009] Optionally, the protective structure also includes a third direction, which is perpendicular to the first direction and the second direction respectively; the second plate includes a connecting portion and a deformation portion, the connecting portion is connected to the edge portion, one end of the deformation portion is connected to the connecting portion, and the other end extends in a direction away from the connecting portion to form the second end, and the deformation portion can be deformed under pressure to form the second recess.

[0010] Optionally, one end of the deformable portion facing the connecting portion at least partially overlaps with the middle portion; or one end of the deformable portion facing the connecting portion is connected to the middle portion.

[0011] Optionally, the connecting portion is provided with a guide post, the edge portion 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 being compressed and deformed, the guide post can move relative to the guide hole along the third direction; Alternatively, 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 during the compression deformation of the protective structure, the guide column can move along the third direction relative to the guide hole.

[0012] Optionally, there are multiple guide holes, and the multiple guide holes are arranged at intervals along the first direction. The connecting part is provided with a guide column at the corresponding position of each guide hole, and the sizes of the multiple guide holes along the third direction gradually decrease from the second end to the first end.

[0013] Optionally, when the protective structure is deformed under pressure, the flow cross-sectional area of the air guide channel tends to increase from the first end to the second end.

[0014] Optionally, the first plate and the second plate are integrally formed parts, or the first plate and the second plate are separately formed parts.

[0015] Optionally, the elongation of the first plate is greater than the elongation of the second plate.

[0016] Optionally, the elongation of the first plate is ε1, which satisfies: 30%≤ε1≤50%; And / or, the elongation of the second plate is ε2, which satisfies: 10%≤ε2≤20%.

[0017] Optionally, the tensile strength of the protective structure is σ, which satisfies: 300MPa≤σ≤800Mpa.

[0018] In the second aspect, an embodiment of the present application proposes an energy storage device, comprising: a box body, an explosion venting plate and a protective device as described in any one of the above items, wherein the explosion venting plate is arranged on the side wall of the box body, the explosion venting plate can exhaust along the second direction, and the protective structure is arranged on one side of the explosion venting plate along the second direction and is connected to the explosion venting plate.

[0019] Optionally, along the first direction, the distance between the protective structure and the nearest edge of the side wall is H1, and the height of the side wall along the first direction is H2, satisfying: 1 / 3≤H1 / H2≤1 / 2.

[0020] Optionally, the bonding force between the protective structure and the explosion venting plate is F, and along the second direction, the orthographic projection area of the explosion venting plate is S1, which satisfies: 0.02 N / mm 2 ≤F / S1≤30N / mm 2 .

[0021] In an embodiment of the present application, the protective device includes: a protective structure, the protective structure having a first direction and a second direction perpendicular to each other, the protective structure having a first end and a second end relatively arranged along the first direction, the first end being suitable for connecting to one side of the explosion venting plate along the second direction, and the second end extending along the first direction toward a direction away from the first end; the protective structure is at least partially capable of being compressed and deformed along the second direction to form an air guide channel extending along the first direction between the explosion venting plate and the protective structure; in this way, after the explosion of the explosion venting plate, the gas or even the flame will flow along the second direction and impact the protective structure to cause it to deform, forming an air guide channel extending along the first direction between the explosion venting plate and the protective structure, thereby causing the gas or even the flame to flow along the air guide channel in the first direction, thereby changing the flow direction of the gas or even the flame after the explosion of the explosion venting plate, reducing the possibility of harm to surrounding workers and equipment, and improving the safety of the energy storage device.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of a protective structure according to an embodiment of the present application from one perspective; Figure 2 is a schematic diagram of a protective structure deformed from one viewing angle according to an embodiment of the present application; Figure 3 is a schematic diagram of a protective structure according to an embodiment of the present application from another perspective; Figure 4 is an exploded view of a protective structure according to an embodiment of the present application; Figure 5 is a schematic diagram of a protective structure deformed from another perspective according to an embodiment of the present application; Figure 6 is a schematic diagram of the installation of the protective structure according to an embodiment of the present application when it is not deformed; Figure 7 is a schematic diagram of the installation of the protective structure when it is deformed according to an embodiment of the present application; Figure 8 is a schematic diagram of an energy storage device according to an embodiment of the present application.

[0024] Reference numerals: 1: Protective structure; 11: First end; 12: Second end; 13: Air guide channel; 14: First plate; 141: Edge portion; 1411: Guide hole; 1412: First mounting hole; 142: Middle portion; 1421: First recess; 15: Second plate; 151: Second recess; 152: Connecting portion; 1521: Guide column; 1522: Second mounting hole; 153: Deformation portion; 16: Reinforcement member; 161: Third mounting hole; 2: Explosion venting panel; 3: Box body; 31: Side wall; X: First direction; Y: Second direction; Z: Third direction. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0029] Before explaining the protective device and energy storage device provided in the embodiments of the present application, the application scenarios of the protective device and energy storage device provided in the embodiments of the present application are specifically described: Energy storage devices help improve energy utilization, balance supply and demand, and ensure grid stability, leading to their widespread application in energy management, power systems, transportation, electronic equipment, and other fields. These devices typically consist of storage containers or cabinets. These devices are typically equipped with explosion relief panels or valves. When internal battery outages cause a sudden increase in pressure within the box or cabinet, these valves provide targeted pressure relief to prevent structural rupture, ensuring explosion-proof ventilation requirements and ensuring the device's safety.

[0030] In the related technologies, one method is to install a small explosion relief valve on the door of the energy storage device. However, in order to meet the explosion-proof requirements of the energy storage device, multiple small explosion relief valves need to be installed, which makes the cost of the energy storage device higher. Another method is to install an explosion relief plate that is larger than the explosion relief valve on the top of the energy storage device, but the top installation increases the difficulty of installation and is prone to problems such as water leakage. Alternatively, the explosion relief plate is installed on the side wall of the energy storage device, but since gas or even flames will flow out from the weak area of the explosion relief plate when the explosion relief plate explodes, it is easy to pose a safety hazard to surrounding personnel or equipment.

[0031] To this end, an embodiment of the present application provides a protective device and an energy storage device. The protective device and energy storage device provided in the embodiment of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0032] like Figure 1 As shown, in some embodiments of the present application, a protective device is proposed, including a protective structure 1, the protective structure 1 having a first direction X and a second direction Y perpendicular to each other, the protective structure 1 having a first end 11 and a second end 12 arranged opposite to each other along the first direction X, the first end 11 being adapted to be connected to a side of the explosion venting plate 2 along the second direction Y, and the second end 12 extending along the first direction X in a direction away from the first end 11; the protective structure 1 is at least partially compressively deformable to form an air guide channel 13 extending along the first direction X between the explosion venting plate 2 and the protective structure 1.

[0033] In the embodiment of the present application, the protective structure 1 is at least partially capable of being deformed under pressure, so that after the explosion-proof plate 2 explodes, 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 an air guide channel 13 extending along the first direction X between the explosion-proof plate 2 and the protective structure 1, thereby causing the gas or even the flame to flow along the air guide channel 13 along the first direction X, thereby changing the flow direction of the gas or even the flame after the explosion-proof plate 2 explodes, reducing the possibility of harm to surrounding workers and equipment, and improving the safety of the energy storage device.

[0034] It is understandable that the protective device of the present application can be applied to an energy storage device, and is used to be installed on the side of the explosion venting plate 2 in the energy storage device facing the second direction Y to prevent gas or even flames from being directly discharged from the explosion venting 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.

[0035] It should be noted that the protective structure 1 has a first direction X and a second direction Y that are perpendicular to each other. The first direction X is the height direction of the protective structure 1. 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 protective structure 1. In actual use, the second direction Y is the width direction of the energy storage device, which is also the horizontal direction.

[0036] It can be understood that the first direction X and the second direction Y are perpendicular to each other, which can be "perpendicular" in the strict sense, that is, the angle between the first direction X and the second direction Y is 90°; or "substantially perpendicular", which specifically refers to the case where the angle between the first direction X and the second direction Y contains a certain error. Taking into account the error associated with the measurement and the measurement of the specific quantity (that is, the limitation of the measurement system), the error is within an acceptable deviation range for the specific value determined by ordinary technicians in the field; illustratively, the angle between the first direction X and the second direction Y is 90°±5°.

[0037] It should be explained that the explosion venting plate 2 is connected to 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 has thermal runaway or other conditions, the internal pressure of the energy storage device increases, and the gas breaks through the explosion venting plate 2 and flows out in the second direction Y, that is, the gas or even flame flows out from the side wall of the energy storage device, which can easily cause direct harm to the operators or equipment, and the protective 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 the flame flows out, it will first impact the protective structure 1 to cause it to deform, and form an air guide channel 13 between the explosion venting plate 2 and the protective structure 1. The air guide channel 13 can guide the gas or even the flame to flow out along the first direction X, that is, guide the gas or even the flame to flow upward, thereby reducing the possibility of harm to the operators or equipment, thereby improving the safety and reliability of the energy storage device.

[0038] In specific applications, such as Figure 1 As shown, the first end 11 of the protective 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 in a direction away from the first end 11; thereby, the portion of the protective structure 1 close to the first end 11 is connected to the explosion venting plate 2, and the portion close to the second end 12 can be separated from the explosion venting plate 2, so that when the explosion venting plate 2 vents, as shown in FIG. Figure 2 As shown, the gas or even flame flowing out of the explosion venting plate 2 will first impact the protective structure 1 along the second direction Y in the direction away from the explosion venting plate 2, so that the part of the protective structure 1 close to the second end 12 is separated from the explosion venting plate 2; and because the impact of the explosion venting plate 2 during explosion venting is relatively large, the protective structure 1 will further deform, thereby forming an air guide channel 13 with an open upper end, so that the gas or even the flame flows out from the upper end.

[0039] It should be noted that in practical applications, Figure 1 The figure shows the state of the protective structure 1 before deformation. At this time, the first end 11 is connected to the explosion venting plate 2, and the second end 12 is in contact with the explosion venting plate 2, which can isolate and protect the explosion venting plate 2 from the outside world. Figure 2 The figure shows the state of the protective structure 1 after deformation. At this time, the first end 11 is connected to the explosion venting plate 2, and the lower half of the protective structure 1 is deformed by the impact, and the second end 12 is separated from the explosion venting plate 2 by the impact. At the same time, the upper half of the protective structure 1 is deformed by the impact when the gas or even the flame flows out, so that an air guide channel 13 is formed between the protective structure 1 and the explosion venting plate 2 to make the gas and even the flame flow out from the upper end, reducing the situation where the gas or even the flame flows out along the second direction Y and directly impacts the workers and equipment.

[0040] It is understandable that when the batteries inside the energy storage device are out of control and the pressure inside the box or cabinet increases suddenly, the gas flowing out from the explosion venting plate 2 may not only contain gas but also flames, etc. Therefore, the protective structure 1 has a relatively high melting point. The specific melting point setting can be set by those skilled in the art according to actual needs. For example, the protective structure 1 is made of stainless steel, or the protective structure 1 is made of aluminum alloy, etc., so that when the explosion venting plate 2 releases flames, it will not be melted or deformed by the flames.

[0041] like Figure 3 As shown, in some embodiments of the present application, the protective structure 1 includes a first plate 14 and a second plate 15; the first plate 14 includes a middle portion 142 and a partially circumferentially arranged edge portion 141 surrounding the middle portion 142, the edge portion 141 is connected to the second plate 15 to form a first end 11, and the middle portion 142 can be compressed and deformed 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 along the first direction X toward away from the first plate 14 to form a second end 12, the second plate 15 can be compressed and 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 an air guide channel 13.

[0042] In the embodiment of the present application, the edge portion 141 in the first plate 14 and the connecting portion of the second plate 15 form a first end 11, so that the first plate 14 and the second plate 15 can be connected to the explosion relief plate 2, thereby achieving connection reliability; and the middle portion 142 can be compressed and deformed along the second direction Y to form a first recess 1421, and the second plate 15 can be compressed and deformed along the second direction Y to form a second recess 151, so that the first recess 1421 and the second recess 151 cooperate to form an air guide channel 13 to lead the gas and even flame flowing out during explosion relief from the first direction X. The first recess 1421 can provide space to accommodate the gas and even flame flowing out during explosion relief, and the second recess 151 can lead the gas and even flame to the upper end to flow out, reducing the damage to workers and equipment caused by the gas and even flame flowing out directly along the second direction Y.

[0043] In specific applications, such as Figure 3 As shown, the first plate 14 and the second plate 15 are at least partially stacked along the second direction Y, so that they can be connected to the explosion venting plate 2 by welding, bolting, bonding, etc. Those skilled in the art can make a choice based on actual conditions as long as the reliability of the connection is guaranteed. This application does not impose any restrictions on this.

[0044] It should be noted that if Figure 4As shown, in actual application, the circumferential edge of the first plate 14 forms a "U-shaped" area connected to the second plate 15, thereby forming the first end 11, which improves the connection reliability of the first plate 14, the second plate 15 and the explosion venting plate 2. Figure 4 As shown, the middle portion 142 of the first plate 14 can be first impacted by gas or even flames to form a first recess 1421 when the explosion venting plate 2 vents an explosion, 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 15 to form a second recess 151. Since the second end 12 formed by the second plate 15 extending along the first direction X is not connected to the explosion venting plate 2, under the impact of gas or even flames, the end of the second plate 15 away from the first plate 14 is separated from the explosion venting plate 2, forming an outlet of the air guide channel 13, so that the gas or even flame entering the first recess 1421 and the second recess 151 flows out from the outlet.

[0045] It needs to be explained that in practical applications, Figure 4 As shown, the first plate 14 is specifically installed on the lower half of the explosion venting plate 2, and the second plate 15 is installed on the upper half of the explosion venting plate 2, that is, along the first direction X, the first plate 14 and the second plate 15 are both connected to the outer periphery of the lower half of the explosion venting plate 2. For example, Figure 5 As shown, a first mounting hole 1412 is provided on the edge portion 141 of the first plate 14, and a second mounting hole 1522 is provided on the second plate 15. Bolts are passed through the first mounting hole 1412 and the second mounting hole 1522 to connect with the outer periphery of the lower half of the explosion-proof plate 2, so that 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 detached due to impact.

[0046] like Figure 5 As shown, in some embodiments of the present application, the protective structure 1 further includes a reinforcement 16 , which is disposed on a side of the second plate 15 away from the edge portion 141 , and is connected to the second plate 15 to form a first end 11 .

[0047] In the embodiment of the present application, the reinforcement 16 is arranged on the side of the second plate 15 away from the edge portion 141, and the reinforcement 16 is connected to the second plate 15 to form the first end 11, so that along the second direction Y, the explosion venting plate 2, the reinforcement 16, the second plate 15, and the first plate 14 are stacked in sequence to ensure the connection reliability between the protective structure 1 and the explosion venting plate 2, that is, the structural strength of the first end 11 is improved by the reinforcement 16, thereby ensuring the connection reliability.

[0048] In a specific application, the reinforcement 16 can be connected to the second plate 15 by welding, bolting, bonding, etc.; for example, Figure 5As shown, a third mounting hole 161 corresponding to the second mounting hole 1522 is provided on the reinforcement 16, so that it can be connected to the explosion venting plate 2 by means of bolts passing through the first mounting hole 1412, the second mounting hole 1522, and the third mounting hole 161 in sequence. 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 use bolts to fix the first plate 14, the second plate 15, the reinforcement 16 and the explosion venting plate 2 on the side wall of the energy storage device at the same time, thereby improving the convenience of installation.

[0049] like Figure 5 As shown, in some embodiments of the present application, the thickness of the first plate 14 gradually increases from the center to the edge of the first plate 14 .

[0050] In the embodiment of the present application, by setting the direction from the center to the edge of the first plate 14, the thickness of the first plate 14 gradually increases, so that the thickness of the edge of the first plate 14 is larger and the structural strength is higher, thereby ensuring the connection reliability of the first plate 14, and the center of the first plate 14 is easier to form, 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 relief.

[0051] In specific applications, when the explosion venting plate 2 is venting an explosion, the middle area thereof is relatively weak and is preferentially impacted, so that the gas or even the flame will flow out from the middle, thereby impacting the center of the first plate 14 along the second direction Y, and setting the thickness of the center of the first plate 14 to be smaller, so that the center of the first plate 14 is more prone to deformation, and the thickness of the edge portion 141 is larger and the structural strength is higher; at the same time, since the first plate 14 is arranged in the lower half of the explosion venting plate 2, the upper end of the first plate 14 is subjected to a greater impact, so that the first plate 14 forms a first depression 1421 with a "large upper portion and a small lower portion" after being impacted, which is more conducive to the outflow of gas or even flames.

[0052] It needs to be explained that in actual application, the first plate 14 includes a "U-shaped" edge portion 141 and a middle portion 142. The thickness of the middle portion 142 is smaller and it is more likely to deform after impact. The thickness of the edge portion 141 is larger and the structural strength is higher to ensure reliability during connection.

[0053] like Figure 5As shown, in some embodiments of the present application, the protective structure 1 also 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 deforming portion 153, the connecting portion 152 is connected to the edge portion 141, one end of the deforming portion 153 is connected to the connecting portion 152, and the other end extends in a direction away from the connecting portion 152 to form a second end 12, and the deforming portion 153 can be deformed under pressure to form a second recess 151.

[0054] In the embodiment of the present application, the connecting portion 152 is connected to the edge portion 141 to connect the second plate 15 to the first plate 14. The deformable portion 153 is connected to the connecting portion 152 at one end along the first direction X, and extends in the first direction X at the other end and is separated from the explosion venting plate 2, so that the deformable portion 153 can be compressed and deformed to form a second recess 151. An outlet can be formed at the end of the deformable portion 153 away from the connecting portion 152 to draw out the gas or even the flame in the second recess 151.

[0055] It should be noted that the third direction Z specifically refers to the width direction of the protective structure 1. In actual use, the third direction Z is also the length direction of the protective device.

[0056] In specific applications, such as Figure 5 As shown, two connecting portions 152 are provided, spaced apart on either side of the deformable portion 153 along the third direction Z, thereby facilitating connection with the U-shaped edge portion 141. The deformable portion 153 is located above the first plate 14 along the first direction X and is not connected to the explosion venting plate 2. In actual use, the deformable portion 153 is located in the upper half of the explosion venting plate 2. When the explosion venting plate 2 vents, gas or even flames flowing out of the upper half impact the deformable portion 153, causing the deformable portion 153 to separate from the explosion venting plate 2 and deform to form the second recess 151.

[0057] like Figure 5 As shown, in some embodiments of the present application, one end of the deformation portion 153 facing the connection portion 152 at least partially overlaps with the middle portion 142; or, one end of the deformation portion 153 facing the connection portion 152 is connected to the middle portion 142.

[0058] In the embodiment of the present application, one end of the deformation portion 153 facing the connecting portion 152 at least partially overlaps with the middle portion 142, so that the deformation portion 153 and the middle portion 142 can undergo the same deformation when impacted, and no additional connection is required, which is convenient for processing; it is also possible that one end of the deformation portion 153 facing the connecting portion 152 is connected to the middle portion 142, so that the deformation portion 153 and the middle portion 142 can undergo the same deformation, thereby making the gas guide channel 13 smoother, facilitating the outflow of gas or even flames; and when the gas or even flame impacts the deformation portion 153 and the middle portion 142, the different deformation amounts of the two will not cause a gap to be generated between the deformation portion 153 and the middle portion 142, causing gas or even flames to flow out of the gap.

[0059] In a specific application, one end of the deformation portion 153 facing the connecting portion 152 at least partially overlaps with the middle portion 142. When the explosion venting plate 2 explodes, the middle portion 142 will be deformed away from the explosion venting plate 2 after being impacted. The deformation portion 153 at least partially overlaps with the middle portion 142, so that the deformed portion of the middle portion 142 will push the deformation portion 153 to cause it to deform.

[0060] When the deformation portion 153 is connected to the middle portion 142 at one end facing the connecting portion 152, the deformation amounts of the two portions when impacted can be made the same without any gap. This avoids the situation where a gap is generated due to different deformation amounts of the two portions due to excessive impact energy of the gas or even flame, thereby ensuring the precise discharge of gas or even flame during explosion relief.

[0061] It can be understood that the deformation portion 153 is connected to the middle portion 142 at one end facing the connection portion 152, which can be a connection form such as welding, bolt connection, and bonding. Those skilled in the art can set it according to actual conditions, and this application does not impose any restrictions on this.

[0062] like Figure 5 As shown, in some embodiments of the present application, the connecting portion 152 is provided with a guide column 1521, and 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 process of the protective structure 1 being compressed and deformed, the guide column 1521 can move along the third direction Z relative to the guide hole 1411.

[0063] In the embodiment 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; at the same time, during the process of compression and deformation of the protective structure 1, 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 by impact, the guide column 1521 can apply a pulling force along the third direction Z to the guide hole 1411, thereby reducing the deformation of the first plate 14 and reducing the possibility of the first plate 14 being broken by excessive impact.

[0064] In specific applications, such as Figure 5 As shown, a guide column 1521 is provided on the side of the connecting portion 152 facing the edge portion 141, and a guide hole 1411 is provided at a position corresponding to the guide column 1521. The guide column 1521 is inserted into the guide hole 1411, so as to guide the first plate 14 and the second plate 15 during installation.

[0065] 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. During the process of the protective structure 1 being compressed and deformed, the guide column can move along the third direction Z relative to the guide hole.

[0066] In an embodiment of the present application, a guide column may be provided on the side of the edge portion 141 facing the connecting portion 152, and a guide hole may be provided on the connecting portion 152 at a position corresponding to the guide column, so that the first plate 14 and the second plate 15 can be guided during installation. At the same time, when the second plate is deformed by impact, the guide column can apply a pulling force along the third direction Z to the guide hole, thereby reducing the deformation of the first plate 14 and reducing the possibility of the first plate 14 being broken by excessive impact.

[0067] In a specific application, the guide posts and guide holes provided on the edge portion 141 and the connecting portion 152 may also replace the original mounting holes and bolts to connect the first plate 14 and the second plate 15 together.

[0068] like Figure 5 As shown, in some embodiments of the present application, a plurality of guide holes 1411 are provided, and the plurality of guide holes 1411 are arranged at intervals along the first direction X. The connecting portion 152 is provided with a guide column 1521 at the corresponding position of each guide hole 1411. From the second end 12 to the first end 11, the size of the plurality of guide holes 1411 along the third direction Z gradually decreases.

[0069] In the embodiment of the present application, the size of the plurality of guide holes 1411 along the third direction Z is gradually reduced from the second end 12 to the first end 11. Figure 5As 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 by impact, the contact time of multiple guide columns 1521 from top to bottom with the corresponding guide holes 1411 is different, that is, the guide column 1521 closer to the upper end contacts the corresponding guide hole 1411 later, so that the guide column 1521 at the upper end applies tension to the guide hole 1411 later, so that the lower end of the first plate 14 is pulled by the guide column 1521 earlier and the deformation is smaller, thereby forming a first recess 1421 with a "large top and small bottom" shape, thereby facilitating the outflow of gas and even flames.

[0070] In specific applications, the multiple guide holes 1411 can be set to any value such as 3, 4, 5, 6, etc., and those skilled in the art can set it according to actual conditions, and this application does not impose any restrictions on this.

[0071] It should be noted that, from the second end 12 to the first end 11, the size of the guide hole 1411 along the third direction Z gradually decreases, that is, from top to bottom, the guide hole 1411 is an "elliptical hole or a bar hole", and the long axis of the multiple 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 bar hole, and the guide hole 1411 at the lower end is a circular hole; technicians in this field can make settings according to actual conditions, and this application does not impose any restrictions on this.

[0072] like Figure 5 As shown, when the protective structure 1 is compressed and deformed, the flow cross-sectional area of the air guide channel 13 increases from the first end 11 to the second end 12 .

[0073] In the embodiment of the present application, the flow cross-sectional area of the air guide channel 13 increases from the first end 11 to the second end 12, thereby forming an air guide channel 13 that is "large at the top and small at the bottom". In this way, the flow cross-sectional area of the air guide channel 13 at the first end 11 is relatively small, which can reduce the influx of air to a certain extent, reduce the risk of the flame spreading downward or backflowing, and at the same time better withstand the impact of gas and even flames, and reduce the risk of deformation; and the flow cross-sectional area of the air guide channel 13 at the second end 12 is relatively large, so that the gas and even the flame flowing into the air guide channel 13 have sufficient discharge space, reducing the pressure of the discharged gas and reducing the possibility of causing damage to the outside.

[0074] It should be noted that the flow cross-sectional area of the air guide channel 13 tends to increase from the first end 11 to the second end 12. It can be a gradient increase or an irregular increase, as long as the air guide channel 13 can form a gradually expanding flow channel with "larger at the top and smaller at the bottom" to reduce airflow resistance and reduce the possibility of turbulence and pressure rebound caused by sudden expansion.

[0075] like Figure 5 As shown, in some embodiments of the present application, the first plate 14 and the second plate 15 are integrally formed parts, or the first plate 14 and the second plate 15 are separately formed parts.

[0076] In the embodiment of the present application, the first plate 14 and the second plate 15 are formed as an integrally molded part, thereby facilitating installation without the need for additional welding or bolting of the first plate 14 and the second plate 15; and the first plate 14 and the second plate 15 are split-molded parts. Since the materials of the first plate 14 and the second plate 15 may be different, processing can be facilitated, thereby improving processing efficiency.

[0077] In a specific application, the first plate 14 and the second plate 15 are integrally formed parts, and can be a single plate body processed by sheet metal processing.

[0078] It can be understood that the material of the first plate 14 and the second plate 15 can be stainless steel, aluminum, aluminum alloy, steel, etc., as long as it can meet the structural strength requirements after processing to form the protective structure 1. Technical personnel in this field can set it according to actual needs, and this application does not impose any restrictions on this.

[0079] In some embodiments of the present application, the elongation of the first plate 14 is greater than the elongation of the second plate 15 .

[0080] In the embodiment of the present application, by setting the elongation of the first plate 14 to be greater than the elongation of the second plate 15, the first plate 14 and the second plate 15 can be deformed at the same time, and since the deformation portion 153 of the second plate 15 is not connected to the explosion venting plate 2, it can be ensured that the "large top and small bottom" air guide channel 13 is finally formed without causing the deformation of the second plate 15 to be too large, which will cause gas or even flames to be ejected laterally during explosion venting.

[0081] In a specific application, for example, Figure 5 As shown, the first plate 14 can be processed from aluminum alloy, and the second plate 15 can be processed from stainless steel, and the deformation portion 153 can partially overlap with the middle portion 142 at one end facing the connecting portion 152. Therefore, when the middle portion 142 is deformed by impact to form a first recess 1421, the middle portion 142 will deform toward the deformation portion 153 and be constrained by the deformation portion 153 with a lower elongation, so that no gap will be formed between the deformation portion 153 at one end facing the connecting portion 152 and the middle portion 142, thereby reducing the possibility of gas or even flame being ejected laterally (along the second direction Y), thereby improving the safety of the protective device.

[0082] In some embodiments of the present application, the elongation of the first plate 14 is ε1, which satisfies: 30%≤ε1≤50%.

[0083] In the embodiment of the present application, by setting the elongation ε1 of the first plate 14 within a reasonable range, it is ensured that during explosion relief, the first depression 1421 generated by the impact deformation of the first plate 14 is within a preset range and does not cause excessive or insufficient deformation.

[0084] It needs to be explained that when the elongation ε1 of the first plate 14 is less than 30%, the volume of the first depression 1421 generated by the impact deformation of the first plate 14 is too small, so that when the explosion is vented, the outflowing gas or even the flame does not have enough space to flow, and backflow may occur; and when the elongation ε1 of the first plate 14 is greater than 50%, the volume of the first depression 1421 generated by the impact deformation of the first plate 14 is too large, so that when the explosion is vented, too much gas or even flame is in the first depression 1421, which is not conducive to the outflow of gas or even flame.

[0085] In specific applications, the elongation ε1 of the first plate 14 can be set to any value such as 30%, 32%, 34%, 36%, 38%, 40%, 45%, 50%, etc., or a range between two arbitrary values.

[0086] It should be noted that the elongation of the first plate 14 and the second plate 15 can be specifically tested through a tensile test. The tensile test is an existing technology and will not be described in detail here.

[0087] In some embodiments of the present application, the elongation of the second plate 15 is ε2, which satisfies: 10%≤ε2≤20%.

[0088] In the embodiment of the present application, by setting the elongation ε2 of the second plate 15 within a reasonable range, it is ensured that during explosion relief, the first depression 1421 produced by the impact deformation of the first plate 14 is within a preset range, and will not produce excessive deformation, causing the gas or even the flame to flow out laterally; or produce too small deformation, making it impossible to efficiently discharge the gas or even the flame.

[0089] It needs to be explained that when the elongation ε2 of the second plate 15 is less than 10%, the volume of the second depression 151 caused by the impact deformation of the second plate 15 is too small, so that when the explosion is released, the outflowing gas or even the flame does not have enough space to flow, and backflow may occur; and when the elongation ε2 of the second plate 15 is greater than 20%, the deformation of the second plate 15 caused by the impact is too large, so that when the explosion is released, the gas or even the flame flows out laterally (along the second direction Y), which may easily cause harm to surrounding workers or equipment.

[0090] In specific applications, the elongation ε2 of the second plate 15 can be set to any value such as 10%, 12%, 14%, 16%, 18%, 20%, etc., or a range between two arbitrary values.

[0091] like Figure 6 As shown, in some embodiments of the present application, the tensile strength of the protective structure 1 is σ, which satisfies: 300MPa≤σ≤800Mpa.

[0092] In the embodiment of the present application, by setting the tensile strength σ of the protective structure 1 within a reasonable range, the integrity of the protective structure during explosion relief is ensured, and the risk of the protective structure 1 being ruptured by gas or even flame impact during explosion relief, resulting in flying fragments, is reduced.

[0093] It needs to be explained that when the tensile strength σ of the protective structure 1 is less than 300 MPa, the tensile strength of the protective structure 1 is too small. During explosion venting, the protective structure 1 may be torn apart by the impact of gas or even flames, and it is impossible to change the flow direction of the gas or even the flame, and the fragments that may be generated may splash and cause other damage; and when the tensile strength σ of the protective structure 1 is greater than 800 MPa, the tensile strength of the protective structure 1 is too large, so that the tensile strength σ of the protective structure 1 has too much redundancy, which makes the material requirements of the protective structure 1 too high and the cost high.

[0094] In a specific application, the tensile strength σ of the protective structure 1 can be set to any value such as 300 MPa, 400 MPa, 500 MPa, 600 MPa, 700 MPa, 800 MPa, or a range between two arbitrary values.

[0095] In specific applications, the tensile strength σ of the protective structure 1 can be tested by a static axial tensile test to test the tensile strength of the material of the first plate 14 or the second plate 15; it can also be tested by a dynamic impact tensile test to test the tensile strength of the connection between the first plate 14 and the second plate 15; it can also be tested by a transverse tensile test to test the welding strength between the first plate 14 and the second plate 15. The above-mentioned static axial tensile test, dynamic impact tensile test and transverse tensile test are all conventional tensile strength test methods and will not be repeated here.

[0096] like Figure 7 As shown, in some embodiments of the present application, an energy storage device is also proposed, including: a box body 3, an explosion venting plate 2 and a protective device as described in any of the above embodiments, the explosion venting plate 2 is arranged on the side wall 31 of the box body 3, the explosion venting plate 2 can exhaust along the second direction Y, and the protective structure 1 is arranged on one side of the explosion venting plate 2 along the second direction Y and is connected to the explosion venting plate 2.

[0097] In the embodiment of the present application, the protective structure 1 is arranged on one side of the explosion venting plate 2 along the second direction Y and is connected to the explosion venting plate 2, so that when the explosion venting plate 2 is venting, the gas discharged along the second direction Y along the explosion venting plate 2 can impact the protective structure 1 to cause it to deform, and then form an air guide channel 13 extending along the first direction X, so that the gas and even the flame can be discharged upward along the air guide channel 13, thereby reducing the possibility of damage to surrounding workers and equipment.

[0098] In specific applications, the energy storage device can be an energy storage container or an energy storage cabinet, etc. The explosion venting plate 2 can be set 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. Those skilled in the art can set it according to actual needs, and this application does not impose any restrictions on this.

[0099] like Figure 8 As shown, in some embodiments of the present application, along the first direction X, the distance between the protective structure 1 and the nearest edge of the side wall 31 is H1, and the height of the side wall 31 along the first direction X is H2, satisfying: 1 / 3≤H1 / H2≤1 / 2.

[0100] In the embodiment of the present application, by setting the ratio H1 / H2 between the distance H1 between the protective structure 1 and the nearest edge of the side wall 31 and the height H2 of the side wall 31 along the first direction X within a reasonable range, the protective structure 1 can be installed at a reasonable height. Therefore, when the explosion is vented, the gas or even the flame flowing out from the outlet of the air guide channel 13 of the protective structure 1 is not likely to harm the surrounding workers, thereby improving the safety of the protective device.

[0101] It should be noted that the distance H1 between the protective structure 1 and the nearest edge of the side wall 31 along the first direction X specifically refers to: the height between the protective structure 1 and the upper edge of the side wall 31. During 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 using a ruler or other tool.

[0102] It should be explained that when the ratio H1 / H2 between the distance H1 between the protective structure 1 and the nearest edge of the side wall 31 and the height H2 of the side wall 31 along the first direction X is less than 1 / 3, that is, the installation position of the protective structure 1 is too high, and it is inconvenient to install the protective structure 1; and when the ratio H1 / H2 between the distance H1 between the protective structure 1 and the nearest edge of the side wall 31 and the height H2 of the side wall 31 along the first direction X is greater than 1 / 2, that is, the installation position of the protective structure 1 is too low, and when the explosion is vented, the gas or even the flame flowing out of the cavity 101 can easily injure the surrounding workers.

[0103] The ratio H1 / H2 between the distance H1 between the protective structure 1 and the nearest edge of the side wall 31 and the height H2 of the side wall 31 along the first direction X can be set to any value such as 1 / 3, 2 / 5, 1 / 2, or a range between two arbitrary values.

[0104] It is understandable that in actual use, the side wall 31 of the protective structure 1 is generally 2.5m~4.5m. When the installation position of the protective structure 1 is too low, that is, the position of the outlet of the air guide channel 13 is too low, when the explosion is vented, the discharged gas or even the flame can easily cause damage to the surrounding workers.

[0105] like Figure 8 As shown, in some embodiments of the present application, the bonding force between the protective structure 1 and the explosion venting plate 2 is F, and along the second direction Y, the orthographic projection area of the explosion venting plate 2 is S3, which satisfies: 0.02N / mm 2 ≤F / S3≤30N / mm 2 .

[0106] In the embodiment of the present application, by setting the ratio F / S3 between the bonding force F between the protective structure 1 and the explosion venting plate 2 and the orthographic projection area S3 of the explosion venting plate 2 within a reasonable range, it is possible to reduce the situation where the gas or even the flame flowing out of the explosion venting plate 2 during explosion venting impacts and detaches the protective structure 1, thereby ensuring the connection stability and reliability of the protective structure 1.

[0107] It should be noted that, in actual use, the bonding force F between the protective structure 1 and the explosion venting plate 2 can specifically represent the connection strength between the protective structure 1 and the explosion venting plate 2. In actual use, it may be specifically manifested as the welding strength between the protective structure 1 and the explosion venting plate 2, or the bolt preload force between the protective structure 1 and the explosion venting plate 2.

[0108] It should be explained that when the ratio of the bonding force F between the protective structure 1 and the explosion venting plate 2 to the orthographic projection area S3 of the explosion venting plate 2 is less than 0.02N / mm 2 When the bonding force F between the protective structure 1 and the explosion venting plate 2 is too small, the protective structure 1 cannot withstand the impact of the gas or even the flame during explosion venting, causing the protective structure 1 to detach, thus failing to achieve accurate explosion venting; and when the ratio of the bonding force F between the protective structure 1 and the explosion venting plate 2 to the orthographic projection area S3 of the explosion venting plate 2 is F / S3>30N / mm 2 That is, the bonding force F between the protective structure 1 and the explosion venting plate 2 is too large, resulting in redundancy. In actual use, this is reflected in the excessive number of bolts, resulting in high costs and complicated installation.

[0109] In a specific application, the ratio F / S3 between the bonding force F between the protective structure 1 and the explosion venting plate 2 and the orthographic projection area S3 of the explosion venting plate 2 can be specifically set to: 0.02N / mm 2 , 1N / mm 2 , 5N / mm 2 , 10N / mm 2 , 15N / mm 2 , 20N / mm 2 , 22N / mm 2 , 25N / mm 2 , 28N / mm 2 , 30N / mm 2 Any value or a range between two arbitrary values.

[0110] It can be understood that the bonding 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. When the protective structure 1 is connected to the side wall 31, it can also be the bonding 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 preload force of the bolts and the number of bolts can be measured, and then the product between the preload force of the bolts and the number of bolts can be calculated to obtain the size of the bonding force F. In actual use, the bonding force F can be adjusted by designing the number of bolts, which is conducive to simplifying the number of bolts and reducing costs.

[0111] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0112] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A protective device, characterized in that: include: A protective structure (1), the protective structure (1) having a first direction (X) and a second direction (Y) perpendicular to each other, the protective structure (1) having a first end (11) and a second end (12) arranged opposite to each other along the first direction (X), the first end (11) being suitable for being connected to a side of the explosion relief plate (2) along the second direction (Y), and the second end (12) extending along the first direction (X) in a direction away from the first end (11); At least a portion of the protective structure (1) is capable of being deformed under pressure, so as to form an air guide channel (13) extending along the first direction (X) between the explosion relief plate (2) and the protective structure (1).

2. The protective device according to claim 1, characterized in that The protective structure (1) comprises a first plate (14) and a second plate (15); The first plate (14) comprises a middle portion (142) and an edge portion (141) partially circumferentially arranged around the middle portion (142); the edge portion (141) and the connecting portion of the second plate (15) form the first end (11); the middle portion (142) is capable of being compressed and deformed 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 along the first direction (X) in a direction away from the first plate (14) to form the second end (12). The second plate (15) can be compressed and 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 air guide channel (13).

3. The protective device according to claim 2, characterized in that: The protective structure (1) further comprises a reinforcement member (16), wherein the reinforcement member (16) is provided on a side of the second plate member (15) facing away from the edge portion (141), and the reinforcement member (16) is connected to the second plate member (15) to form the first end (11).

4. The protective device according to claim 2, characterized in that: The thickness of the first plate (14) gradually increases from the center to the edge of the first plate (14).

5. The protective device according to claim 2, characterized in that: The protective structure (1) further includes a third direction (Z), wherein the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y); The second plate member (15) includes a connecting portion (152) and a deforming portion (153), wherein the connecting portion (152) is connected to the edge portion (141), one end of the deforming portion (153) is connected to the connecting portion (152), and the other end extends in a direction away from the connecting portion (152) to form the second end (12), and the deforming portion (153) can be deformed under pressure to form the second recess (151).

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

7. The protective device according to claim 5, characterized in that: 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), the guide column (1521) is inserted into the guide hole (1411), and when the protective structure (1) is compressed and deformed, the guide column (1521) can move relative to the guide hole (1411) along the third direction (Z); Alternatively, the edge portion (141) is provided with a guide column, 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 process of the protective structure (1) being compressed and deformed, the guide column can move relative to the guide hole along the third direction (Z).

8. The protective device according to claim 7, characterized in that: There are a plurality of guide holes (1411), and the plurality of guide holes (1411) are arranged at intervals along the first direction (X). The connecting portion (152) is provided with a guide post (1521) at a corresponding position of each guide hole (1411). From the second end (12) to the first end (11), the sizes of the plurality of guide holes (1411) along the third direction (Z) gradually decrease.

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

10. The protective device according to any one of claims 2 to 8, 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 split-formed parts.

11. The protective device according to any one of claims 2 to 8, characterized in that: The elongation of the first plate (14) is greater than the elongation of the second plate (15).

12. The protective device according to claim 11, 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%.

13. 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.

14. An energy storage device, characterized in that: include: A box body (3), an explosion venting plate (2), and a protective device according to any one of claims 1 to 13, wherein the explosion venting plate (2) is arranged on a side wall (31) of the box body (3), the explosion venting plate (2) is capable of exhausting air along the second direction (Y), and the protective structure (1) is arranged on one side of the explosion venting plate (2) along the second direction (Y) and is connected to the explosion venting plate (2).

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

16. The energy storage device according to claim 14, wherein: The bonding force between the protective structure (1) and the explosion relief plate (2) is F, and along the second direction (Y), the orthographic projection area of the explosion relief plate (2) is S1, which satisfies: 0.02 N / mm 2 ≤F / S1≤30N / mm 2 .

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