Box body and power electronic equipment

Abstract

The utility model discloses a box and power electronic equipment, and relates to the technical field of electronic equipment, the box comprises a box body and a box cover, and the box cover and the box body define an accommodating space for accommodating electronic devices; the first side, in the first direction, of the box cover is connected with the box body through the stress release part, and the second side is rotationally connected with the box body. Under the normal use condition, the box cover and the box body are connected in a sealed mode through a sealing piece and other structures to form the closed containing space in a surrounding mode, and when an electronic device in the containing space is impacted or exploded due to faults and other factors, the stress releasing part can serve as a weak point for connection between the box body and the box cover to deform earlier than other structures. And meanwhile, the box cover can move around the second side along the opening direction along with the deformation of the stress release part, so that a gap capable of communicating the accommodating space with the outside is generated between the box cover and the box body, and active release explosion venting of pressure in the accommodating space is carried out.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and more specifically, to a housing and power electronic equipment. Background Technology

[0002] In current inverters and other power electronic devices that require sealing, internal components such as capacitors, switches, relays, and semiconductor devices may explode when subjected to electrical faults. The enormous pressure generated by the explosion may cause the equipment enclosure to rupture and scatter debris. This not only poses a significant safety threat to surrounding equipment and personnel but also exposes internal components to the outside environment, creating a risk of contact with unauthorized personnel or foreign objects, resulting in substantial safety risks.

[0003] Therefore, how to optimize the enclosure design to reduce the safety hazards caused by explosions of power electronic equipment has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a housing to reduce the safety hazards caused by explosions of power electronic equipment.

[0005] Another object of this application is to provide a power electronic device including the aforementioned enclosure.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A housing, comprising:

[0008] Box body;

[0009] The lid is connected to the body of the box via a stress-relieving part on a first side along a first direction, and is rotatably connected to the body of the box on a second side, and the lid and the body of the box form an accommodating space.

[0010] When an explosion occurs within the containment space, the stress relief section deforms, and the lid rotates in the opening direction along with the deformation of the stress relief section to form a gap.

[0011] Optionally, in the above-described enclosure, the stress relief part includes a first connecting part disposed on the enclosure cover, a second connecting part disposed on the enclosure body, and a connecting assembly connecting the first connecting part and the second connecting part;

[0012] When an explosion occurs within the containment space, at least one of the first connecting portion, the second connecting portion, and the connecting assembly deforms to form the gap.

[0013] Optionally, in the aforementioned housing, the first connecting portion includes a plurality of first connecting holes spaced apart along a second direction, the connecting assembly passing through one of the first connecting holes, and when an explosion occurs within the containment space, the connecting assembly tears apart the gap between the first connecting hole where it is located and the adjacent first connecting holes to form the gap;

[0014] And / or, the second connection includes a plurality of second connection holes spaced apart along a second direction, the connection assembly passing through one of the second connection holes, and when an explosion occurs within the containment space, the connection assembly tears apart the gap between its own second connection hole and the adjacent second connection hole to form the gap.

[0015] Optionally, in the aforementioned housing, when an explosion occurs within the containment space, the distance between two adjacent first connecting holes is the same or gradually increases along the direction of movement of the connecting assembly relative to the housing cover.

[0016] And / or, when an explosion occurs within the containment space, the spacing between two adjacent second connection holes is the same or gradually increases along the direction of movement of the connection assembly relative to the housing body.

[0017] Optionally, in the aforementioned housing, the connecting assembly includes a deformation release seat and a fastener. The deformation release seat is connected to one of the first connecting portion and the second connecting portion, and the fastener is disposed on the deformation release seat and connected to the other of the first connecting portion and the second connecting portion.

[0018] When an explosion occurs within the containment space, the deformation release seat deforms to form the gap.

[0019] Optionally, in the aforementioned enclosure, when an explosion occurs and pressure is released within the containment space, the enclosure lid moves around the second side in the closing direction under its own weight or the elastic force of the elastic element.

[0020] Optionally, in the aforementioned enclosure, at least one of the enclosure body and the enclosure lid is provided with a protective component, which covers the gap.

[0021] Optionally, in the aforementioned enclosure, the protective component includes at least one of a first flange and a second flange, the first flange being disposed on the enclosure cover and the second flange being disposed on the enclosure body, the first flange and / or the second flange covering the gap.

[0022] Optionally, in the aforementioned housing, the width of the first flange located on both sides of the stress relief portion gradually increases along the direction from the second side to the first side.

[0023] Optionally, in the above-mentioned box, the first flange and the box cover are an integral structure or a separate structure, and the second flange and the box body are an integral structure or a separate structure.

[0024] A power electronic device includes electronic components and the aforementioned housing, wherein the electronic components are disposed within the housing space.

[0025] The enclosure provided in this application includes an enclosure body and an enclosure lid, which together form a space for housing electronic devices. The enclosure lid is connected to the enclosure body via a stress relief section on a first side along a first direction, and rotatably connected to the enclosure body on a second side. Under normal use, the enclosure lid and enclosure body are sealed together by a sealing element or other structure to form a closed space. When the electronic devices in the space are impacted or exploded due to a malfunction or other factors, the stress relief section acts as a weak point in the connection between the enclosure body and the enclosure lid, deforming before other structures. Simultaneously, the enclosure lid can rotate around the second side along the opening direction as the stress relief section deforms, thereby creating a gap between the enclosure lid and the enclosure body that connects the space to the outside, allowing for active pressure release and explosion relief within the space.

[0026] Compared to existing technologies, the enclosure provided in this application, by incorporating a stress-relieving section as a weak point during pressure relief, ensures that only the stress-relieving section deforms during an explosion within the containment space, forming a safe and controllable gap only on one side of the stress-relieving section and its adjacent two sides. Furthermore, since the gaps on both sides of the stress-relieving section are triangular in shape, the size of the gaps can be effectively controlled, reducing the risk of devices within the containment space being touched, improving the safety performance of the equipment, and offering advantages such as simple structure, low cost, and high practicality. In addition, the enclosure disclosed in this application significantly reduces the probability of the enclosure cover breaking and scattering, greatly reducing the safety hazards caused by explosions of power electronic equipment.

[0027] The power electronic equipment disclosed in this application includes the aforementioned enclosure and electronic components. The electronic components are housed within the enclosure. Since it includes the aforementioned enclosure, it also possesses the aforementioned beneficial effects. Other structures refer to the prior art and will not be described in detail here. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1This is a schematic diagram of the structure of the first type of box disclosed in the embodiments of this application. Figure 1 ;

[0030] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 3 This is a schematic diagram of the structure of the first type of box disclosed in the embodiments of this application. Figure 2 ;

[0032] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0033] Figure 5 This is a schematic diagram illustrating the engagement of the first connecting hole and the connecting component disclosed in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram illustrating another possible interaction between the first connecting hole and the connecting component disclosed in an embodiment of this application.

[0035] Figure 7 This is a schematic diagram of the structure of the first type of box disclosed in the embodiments of this application. Figure 3 ;

[0036] Figure 8 for Figure 7 A magnified view of a section at point C;

[0037] Figure 9 for Figure 7 A magnified view of a section at point D;

[0038] Figure 10 This is a schematic diagram of the structure of the box body disclosed in the embodiments of this application;

[0039] Figure 11 This is a schematic diagram of the structure of the box lid disclosed in an embodiment of this application;

[0040] Figure 12 This is a schematic diagram of the structure of the first type of box disclosed in the embodiments of this application. Figure 4 ;

[0041] Figure 13 This is a schematic diagram of the structure of the second type of box disclosed in the embodiments of this application. Figure 1 ;

[0042] Figure 14 for Figure 13 A magnified view of a section at point E in the middle;

[0043] Figure 15 This is a schematic diagram of the structure of the second type of box disclosed in the embodiments of this application. Figure 2 ;

[0044] Figure 16 for Figure 15 A magnified view of a section at point F in the middle;

[0045] Figure 17 This is a schematic diagram of the structure of the connection component disclosed in the embodiments of this application. Figure 1 ;

[0046] Figure 18 This is a schematic diagram of the structure of the connection component disclosed in the embodiments of this application. Figure 2 .

[0047] Wherein, 100 is the lid, 100a is the first side, 100b is the second side, 101 is the first connecting part, and 110 is the first flange;

[0048] 200 is the main body of the box, 201 is the second connecting part, and 210 is the second flange;

[0049] 300 is a connecting component, 310 is a fastener, 311 is a limiting component, and 320 is a deformation release seat;

[0050] 400 is the hinge part;

[0051] 500 is a sealing element;

[0052] 600 is the stress relief section. Detailed Implementation

[0053] The core of this application is to disclose a housing to reduce the safety hazards caused by explosions of power electronic equipment.

[0054] Another key aspect of this application is the disclosure of a power electronic device that includes the aforementioned enclosure.

[0055] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model as described in the claims. Additionally, the complete contents of the structures represented in the embodiments below are not limited to those necessary for the solution of the utility model as described in the claims. It should be noted that, for ease of description, only the parts relevant to the utility model are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0056] Combination Figures 1-4 , Figure 1 and Figure 3 These are schematic diagrams illustrating the structure of the enclosure disclosed in this application under normal conditions and under conditions of explosion and depressurization within the containment space. Figure 2 and Figure 4These are schematic diagrams of the stress relief section 600 in its normal state and its torn state, respectively. In this application, the opening direction of the lid 100 refers to the direction in which the lid 100 rotates relative to the box body 200 around the second side 100b, exposing the accommodating space; the closing direction refers to the direction in which the lid 100 rotates relative to the box body 200 around the second side 100b, closing the accommodating space. Furthermore, it should be noted that since the forces generated during an explosion cannot act regularly on the lid 100 and cause it to open normally, the actions of the lid 100 during depressurization may include vibration, torsion, deformation, and tearing, in addition to rotation. The deformation of the stress relief section 600 in this application includes deformation and tearing, and the overall deformation direction of the stress relief section 600 is usually the same as or opposite to the opening direction of the lid 100 during depressurization.

[0057] The enclosure disclosed in this application includes an enclosure body 200 and an enclosure cover 100. The enclosure cover 100 and the enclosure body 200 form a receiving space for accommodating electronic devices. The enclosure cover 100 is connected to the enclosure body 200 via a stress relief part 600 on a first side 100a along a first direction, and is rotatably connected to the enclosure body 200 on a second side 100b. Wherein, combined with Figure 13 and Figure 14 Under normal use, the cover 100 and the body 200 are sealed together by a sealing element 500 and other structures to form a closed containment space. When the electronic components in the containment space are impacted or exploded due to factors such as malfunction, the stress relief part 600 can act as the weak point in the connection between the body 200 and the cover 100 and deform before other structures. At the same time, the cover 100 can rotate around the second side 100b in the opening direction as the stress relief part 600 deforms, thereby creating a gap between the cover 100 and the body 200 that can connect the containment space with the outside world, so as to actively release the pressure in the containment space.

[0058] Specifically, the stress relief part 600 can be made of a material that is more easily deformable than the box body 200 and the box cover 100, or the stress relief part 600 can be designed with a structure that is easy to deform, or even a flexible component can be used directly to achieve this function.

[0059] Compared to existing technologies, the enclosure disclosed in this application uses a stress relief section 600 as a weak point during pressure relief. In the event of an explosion within the containment space, only the stress relief section 600 deforms, creating a safe and controllable gap only on one side of the stress relief section 600 and its adjacent sides. Furthermore, since the gaps on both sides of the stress relief section 600 are triangular in shape, the size of the gaps can be effectively controlled, reducing the risk of devices within the containment space being touched, improving the safety performance of the equipment, and offering advantages such as simple structure, low cost, and high practicality. In addition, the enclosure disclosed in this application significantly reduces the probability of the enclosure cover 100 breaking and scattering, greatly reducing the safety hazards caused by explosions of power electronic equipment.

[0060] In some specific embodiments disclosed in this application, combined with Figure 7 and Figure 8 The lid 100 is hinged to the body 200 via a hinge 400 on its second side 100b along a first direction. During normal use, the lid 100 can be opened and closed around the body 200 via the hinge 400 for assembling electronic components. In the event of an explosion within the containment space, the stress relief part 600 deforms, and the lid 100 can rotate along the opening direction around the second side 100b of the body 200 via the hinge 400, creating a gap between the lid 100 and the body 200. The hinge 400 can be, but is not limited to, a hinge, torsion spring, flexible component, or elastic component. In this embodiment, it is necessary to ensure that the deformation force of the stress relief part 600 is less than the force of the hinge 400 being damaged.

[0061] When the stress relief section 600 deforms, the maximum inscribed circle diameter of the gap is ≤50mm, and further, the maximum width of the gap is ≤12mm, so as to reduce the risk of electronic devices in the housing space being touched while releasing pressure.

[0062] In some embodiments, combined with Figure 9 and Figure 10The stress relief section 600 includes a first connecting portion 101 disposed on the lid 100, a second connecting portion 201 disposed on the body 200, and a connecting assembly 300 connecting the first connecting portion 101 and the second connecting portion 201. When an explosion occurs within the containment space, at least one of the first connecting portion 101, the second connecting portion 201, and the connecting assembly 300 deforms to create the aforementioned gap between the lid 100 and the body 200. Those skilled in the art will understand that the first connecting portion 101 and / or the connecting assembly 300 are typically designed to be easily deformable, so that when an impact occurs within the containment space, only the lid 100 and the connecting assembly 300 are deformed to release pressure, ensuring the structural stability of the body 200, reducing the impact on electronic components within the containment space, and facilitating the secondary use of the body 200.

[0063] Combination Figures 1-4 , Figure 1 and Figure 2 This is a schematic diagram of the structure of the first connecting part 101 before it is torn. Figure 2 and Figure 3 This is a schematic diagram of the structure after the first connecting portion 101 has been torn. In some embodiments, combined with... Figure 10 The first connecting part 101 includes a plurality of first connecting holes arranged at intervals along a second direction, which is generally perpendicular to the first direction. The connecting component 300 passes through one of the first connecting holes to connect the box body 200 and the box cover 100. When an explosion occurs in the containment space, the connecting component 300 at least tears the gap between its own first connecting hole and its adjacent first connecting holes, so that the connecting component 300 can move with the box body 200 and generate relative displacement with the box cover 100, thereby creating the aforementioned gap between the box cover 100 and the box body 200.

[0064] In other embodiments, combined with Figure 6 The first connecting portion 101 includes a strip-shaped groove extending along a second direction. The inner wall of the groove has multiple holes through which the connecting assembly 300 can pass by means of limiting protrusions. When an explosion occurs within the containment space, the connecting assembly 300 moves to other holes in the direction indicated by the arrow by deforming the limiting protrusions, thereby allowing the connecting assembly 300 to move with the housing body 200 and create displacement between itself and the housing cover 100. Typically, the second direction is perpendicular to the first direction and arranged along the opening and closing direction of the housing cover 100, facilitating tearing of the connecting assembly 300 between the first connecting holes.

[0065] Accordingly, combined Figure 11The second connecting portion 201 can also adopt a structure similar to that of the first connecting portion 101 described above. For example, the second connecting portion 201 includes a plurality of second connecting holes arranged at intervals along the second direction. The connecting component 300 passes through one of the second connecting holes. When an explosion occurs in the containing space, the connecting component 300 at least tears the gap between the second connecting hole where it is located and the adjacent second connecting holes, so as to create a gap between the cover 100 and the box body 200. The structure is simple and easy to manufacture.

[0066] It should be noted that, in the event of an explosion, both the container body 200 and the lid 100 can move. The position of the connecting component 300 may remain unchanged or it may also move, tearing the gap between the first connecting holes and / or the gap between the second connecting holes. Alternatively, in the event of an explosion, one of the lid 100 and the container body 200 may remain fixed in position while the other moves. For example, in the event of an explosion, the position of the lid 100 may remain unchanged, while the container body 200 may move the connecting component 300 relative to the lid 100, tearing the gap between the first connecting holes; or, in the event of an explosion, the position of the container body 200 may remain unchanged, while the lid 100 may move the connecting component 300 relative to the container body 200, tearing the gap between the second connecting holes.

[0067] Since energy absorption can be achieved through deformation and / or tearing of the stress relief section 600 during an explosion, the minimum tearing force of the stress relief section 600 can be adjusted by adjusting the spacing between two adjacent first connecting holes. In some embodiments, when an explosion occurs within the containment space, the spacing between two adjacent first connecting holes is the same along the moving direction of the connecting assembly 300 relative to the cover 100. The housing design in this embodiment is simple and easy to manufacture. Furthermore, combined with... Figure 5 , Figure 5 In the formula A1 < A2 < A3, when an explosion occurs in the containment space, the distance between two adjacent first connecting holes gradually increases along the moving direction of the connecting component 300 relative to the box cover 100. When the explosion is small, it is possible to avoid tearing apart all the gaps between the first connecting holes in order to match different explosion energies and thus effectively control the size of the gap.

[0068] Correspondingly, the second connecting hole can also adopt a structure similar to the first connecting hole described above. That is, when an explosion occurs in the containing space, the distance between two adjacent second connecting holes remains unchanged along the moving direction of the connecting component 300 relative to the box body 200, which is convenient for design and production; or, when an explosion occurs in the containing space, the distance between two adjacent second connecting holes gradually increases along the moving direction of the connecting component 300 relative to the box body 200 to match different explosion degrees and thus control the size of the gap.

[0069] In some specific embodiments disclosed in this application, the aforementioned gap is formed by the deformation of the connecting component 300, combined with... Figures 13-18 ,in, Figure 13 , Figure 14 and Figure 17 This is a schematic diagram of the deformation release seat 320 before deformation. Figure 15 , Figure 16 and Figure 18 This is a schematic diagram of the deformable release seat 320 after deformation. The connecting assembly 300 includes the deformable release seat 320 and a fastener 310. The deformable release seat 320 is connected to one of the first connecting part 101 and the second connecting part 201. The fastener 310 is mounted on the deformable release seat 320 via a limiting member 311 and is connected to the other of the first connecting part 101 and the second connecting part 201. When an explosion occurs within the containment space, the deformable release seat 320 deforms to create a gap between the lid 100 and the body 200. In this embodiment, the gap is created by the deformation of the deformable release seat 320, thereby preventing deformation of the lid 100 and the body 200, thus maintaining the structural integrity of the lid 100 and the body 200 and extending their service life. The deformable release seat 320 can be fixed to the body 200 by welding, bolting, or other methods. For example, Figure 17 and Figure 18 The image shows an Ω-shaped deformation release seat 320. The deformation release seat 320 can also be other shapes, which will not be described in detail here.

[0070] Furthermore, in some embodiments, combined with Figure 17 and Figure 18 The limiting member 311 is sleeved on the fastener 310, and the two are engaged by friction. When an explosion occurs in the accommodating space, the limiting member 311 is pushed to slide on the fastener 310, thereby accommodating the generation of the gap.

[0071] To further optimize the design, at least one of the enclosure body 200 and the enclosure cover 100 is equipped with a protective component. When a gap is formed between the enclosure cover 100 and the enclosure body 200, the protective component can shield the gap, thereby isolating the electronic components within the enclosure space from the outside environment. This reduces the risk of foreign objects or biological contact with the electronic components within the enclosure space, improving the safety performance of the equipment, while not affecting the pressure relief of the gap. Specifically, the types of protective components include, but are not limited to, protective nets or protective films made of flexible or elastic materials. Both sides of these components can be connected to the enclosure body 200 and the enclosure cover 100 respectively. During the gap formation process, the protective net or protective film can be stretched and unfolded under force, adapting to various possible shapes of the gap. Furthermore, under normal use, if the enclosure cover 100 is located directly above the enclosure body 200, the protective net can be connected only to the enclosure cover 100 and naturally unfold under gravity or the action of a counterweight to shield the gap.

[0072] In some embodiments, the protective component includes an expansion container comprising a housing and a lid. The housing has an inner cavity for accommodating the expansion material, and the lid is connected to the housing to seal the inner cavity. The expansion material can specifically be a foamed material, compressed sponge, etc., possessing the property of expanding outwards without external pressure. During normal use, the housing and lid are connected, the inner cavity is sealed, and the expansion material is contained within the inner cavity. Simultaneously, the lid is connected to the lid 100, and the housing is connected to the housing body 200. During the formation of the gap, the lid moves with the lid 100 and separates from the housing, opening the inner cavity. The expansion material can be partially concealed in the gap, achieving isolation between the containment space and the outside environment without affecting pressure relief.

[0073] Combination Figure 10 and Figure 11 In some specific embodiments disclosed in this application, the protective component includes at least one of a first flange 110 and a second flange 210. The first flange 110 is disposed on the cover 100, and the second flange 210 is disposed on the body 200. The first flange 110 can enhance the structural strength of the cover 100 and reduce its deformation. Additionally, the first flange 110 can provide installation space, and a hinge portion 400 and / or a stress relief portion 600 can be disposed on the first flange 110. The second flange 210 can enhance the structural strength of the body 200 and reduce its deformation. Simultaneously, the second flange 210 can serve as an installation base, and the stress relief portion 600 can be disposed on the second flange 210. Furthermore, the first flange 110 and the second flange 210 can cover the gap to a certain extent, reducing the risk of the internal components of the storage space being touched.

[0074] Further optimize the plan, combined with Figure 12When the lid 100 and the body 200 are connected by the hinge 400, the width of the first flange 110 on both sides of the stress relief part 600 gradually increases along the direction from the second side 100b to the first side 100a, that is, along the direction from the hinge 400 to the stress relief part 600, so as to match the triangular gap formed on both sides of the stress relief part 600, thereby saving materials and reducing the total weight of the box and production costs.

[0075] The first flange 110 and the lid 100 can be an integral or separate structure. Specifically, when the first flange 110 and the lid 100 are separate structures, the connection methods between them include, but are not limited to, screw connection, plug connection, snap connection, etc., with a wide range of options. The second flange 210 and the box body 200 can be an integral or separate structure. When the second flange 210 and the box body 200 are separate structures, the connection methods between them include, but are not limited to, screw connection, plug connection, snap connection, etc., with a wide range of options.

[0076] In some embodiments, when the enclosure adopts such Figure 13 and Figure 15 When arranged as shown, after an explosion occurs and the pressure is released in the containment space, the cover 100 can move around the second side 100b in the closing direction under its own gravity, thereby actively reducing the gap after pressure release and thus reducing the risk of the device in the containment space being touched.

[0077] In other embodiments, after an explosion occurs within the containment space and the pressure is released, the lid 100 can move around the second side 100b in a closing direction under the elastic force of the elastic element. Specifically, the connecting assembly 300 includes an elastic element, the two ends of which are respectively connected to the first connecting portion 101 and the second connecting portion 201. Under normal use, the elastic element is in its initial state. When an explosion occurs within the containment space, the box body 200 and the lid 100 respectively drive the first connecting portion 101 and the second connecting portion 201 to move away from each other. At this time, the elastic element is stretched and deformed, so that a gap can be formed between the box body 200 and the lid 100 to release pressure. After the pressure is released, the elastic element can drive the box body 200 and the lid 100 to reset under its own elastic force, thereby reducing the risk of the device being touched within the containment space and improving the safety performance of the equipment.

[0078] The power electronic device disclosed in this application includes electronic components and the aforementioned housing. The electronic components are disposed within the housing space. Since it includes the aforementioned housing, it also has the aforementioned beneficial effects. Other structures refer to the prior art and will not be described in detail here.

[0079] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A case characterized by comprising: The box body (200) comprises: a box cover (100), which is connected with the box body (200) through a stress release part (600) on a first side (100a) in a first direction, and is rotationally connected with the box body (200) on a second side (100b), and the box cover (100) and the box body (200) form a containing space; wherein, when an explosion occurs in the containing space, the stress release part (600) deforms, and the box cover (100) rotates along an opening direction with the deformation of the stress release part (600) to form a gap. The stress release part (600) comprises a first connecting part (101) arranged on the box cover (100), a second connecting part (201) arranged on the box body (200), and a connecting assembly (300) connecting the first connecting part (101) and the second connecting part (201); 2. The case of claim 1, wherein, wherein, when an explosion occurs in the containing space, at least one of the first connecting part (101), the second connecting part (201) and the connecting assembly (300) deforms to form the gap. The first connecting part (101) comprises a plurality of first connecting holes arranged at intervals in a second direction, and the connecting assembly (300) passes through one of the first connecting holes; when an explosion occurs in the containing space, the connecting assembly (300) tears the interval between the first connecting hole where the connecting assembly (300) is located and the adjacent first connecting hole to form the gap; 3. The case of claim 2, wherein, and / or, the second connecting part (201) comprises a plurality of second connecting holes arranged at intervals in a second direction, and the connecting assembly (300) passes through one of the second connecting holes; when an explosion occurs in the containing space, the connecting assembly (300) tears the interval between the second connecting hole where the connecting assembly (300) is located and the adjacent second connecting hole to form the gap. When an explosion occurs in the containing space, the interval distance between the adjacent two first connecting holes in the moving direction of the connecting assembly (300) relative to the box cover (100) is the same or gradually increases; 4. The case of claim 3, wherein, and / or, when an explosion occurs in the containing space, the interval distance between the adjacent two second connecting holes in the moving direction of the connecting assembly (300) relative to the box body (200) is the same or gradually increases. The connecting assembly (300) comprises a deformation release seat (320) and a fastener (310), the deformation release seat (320) is connected with one of the first connecting part (101) and the second connecting part (201), and the fastener (310) is arranged on the deformation release seat (320) and connected with the other one of the first connecting part (101) and the second connecting part (201); 5. The case of claim 2, wherein, wherein, when an explosion occurs in the containing space, the deformation release seat (320) deforms to form the gap. When an explosion occurs in the containing space and pressure relief, the box cover (100) moves along a closing direction around the second side (100b) under the action of its own gravity or the elastic force of the elastic member.

6. A box according to any one of claims 1-5, characterized in that ​ 7. A box according to any one of claims 1-5, characterized in that At least one of the box body (200) and the box cover (100) is provided with a protection assembly which shields at the gap.

8. The case of claim 7, wherein, The protection assembly comprises at least one of a first flange (110) and a second flange (210), the first flange (110) is arranged on the box cover (100), the second flange (210) is arranged on the box body (200), and the first flange (110) and / or the second flange (210) shield at the gap.

9. The case of claim 8, wherein, The width of the first flange (110) on both sides of the stress release part (600) gradually increases in the direction from the second side (100b) to the first side (100a).

10. The case of claim 8, wherein, The first flange (110) and the box cover (100) are in an integral structure or a split structure, and the second flange (210) and the box body (200) are in an integral structure or a split structure.

11. A power electronic device, characterized by Electronic devices are arranged in the accommodation space, and the box as claimed in any one of claims 1-10.

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