Box assembly and energy storage device

Abstract

This application provides a housing assembly and an energy storage device. The housing assembly includes: a housing with an opening; a cover plate covering the opening; and a pressure relief fastener connected between the housing and the cover plate. The pressure relief fastener has an mounting portion and a locking portion. The locking portion is fixedly connected to the cover plate, and the mounting portion has a groove on its side. The housing is equipped with mounting screws corresponding to the groove, which pass through the groove and are fixedly connected to the housing. When the high pressure inside the housing reaches a specified threshold, the cover plate pulls the mounting portion through the locking portion. The mounting portion deforms, causing the mounting screws to gradually disengage from the groove. This results in the cover plate being pushed apart from the housing near the pressure relief fastener, creating a venting gap. Gas inside the housing can then be discharged through this venting gap, rapidly releasing internal pressure and preventing the cover plate or other components from exploding, thus improving safety performance.

Description

Technical Field

[0001] This application relates to the field of electronic device enclosure technology, and in particular to an enclosure assembly and energy storage device. Background Technology

[0002] During the operation of sealed electronic components or electrical equipment (such as photovoltaic inverters, energy storage devices, and battery systems), internal faults may pose an explosion risk. Specifically, when a fault causes damage to components, it is accompanied by high temperatures that trigger a chain reaction of physicochemical reactions, such as electrolyte decomposition and insulation material degradation. This releases flammable gases. When the gas concentration reaches the explosion threshold and encounters an ignition source, or when the gas pressure reaches a certain high-pressure threshold, a deflagration or explosion may occur. Because the equipment is sealed, the high pressure generated at the moment of the explosion cannot be released in time, which can cause the enclosure structure to be destroyed and blown away, posing a safety hazard. Utility Model Content

[0003] In view of the above, it is necessary to provide a housing component and an energy storage device to solve the above-mentioned defects.

[0004] The first aspect of this application provides a housing assembly, including: a housing with an opening; a cover plate covering the opening; and a pressure relief fastener connected between the housing and the cover plate; wherein the pressure relief fastener has a mounting portion and a locking portion, the locking portion being fixedly connected to the cover plate, and the mounting portion having a groove on its side; the housing is provided with mounting screws corresponding to the groove, the mounting screws passing through the groove and being fixedly connected to the housing; when the internal pressure of the housing increases, the cover plate pulls the mounting portion through the locking portion, causing the mounting portion to deform and causing the mounting screws to at least partially disengage from the groove, thereby causing the cover plate to at least partially disengage from the housing to form a venting gap.

[0005] In some embodiments, the mounting portion is provided with at least two grooves, which are spaced apart, and the locking portion is located between the plurality of grooves.

[0006] In some embodiments, the mounting screw has a screw portion and a head, the screw portion passing through a groove and being fixedly connected to the housing, and multiple screw portions cooperating to position the side of the mounting portion, and the head cooperating with the housing to clamp both sides of the mounting portion.

[0007] In some embodiments, the locking part is provided with a threaded hole that penetrates the surface of the mounting part, and the cover plate is provided with a locking screw that passes through the cover plate and is fixedly connected to the threaded hole.

[0008] In some embodiments, the housing is provided with a groove, the bottom of the groove has a through hole, the mounting part is received in the groove, and the locking part passes through the through hole.

[0009] In some embodiments, the housing assembly further includes an energy-absorbing fastener fixed to the side of the cover plate facing the housing, and the cover plate is provided with fixing screws; the fixing screws pass through the cover plate and the energy-absorbing fastener and are fixedly connected to the housing.

[0010] In some embodiments, the energy-absorbing fastener is provided with at least one connecting hole and multiple mounting holes, the multiple mounting holes are spaced apart, and the connecting hole is located between the mounting holes. The energy-absorbing fastener is provided with mounting screws, which pass through the mounting holes and are fixedly connected to the cover plate. Fixing screws pass through the cover plate and the connecting holes and are fixedly connected to the housing.

[0011] In some embodiments, a cover plate is defined to have a plurality of corners along its periphery, at least one of the corners is provided with a pressure relief fastener, and the remaining corners are provided with energy absorption fasteners.

[0012] In some embodiments, the energy-absorbing fastener has a relief groove that extends through one side of the energy-absorbing fastener and communicates with the connecting hole.

[0013] A second aspect of this application provides an energy storage device, including electronic components and a housing assembly as provided in the first aspect, wherein the electronic components are disposed within the housing assembly.

[0014] With the enclosure assembly and energy storage device provided in this application, when the high pressure inside the enclosure reaches a specified threshold, the cover plate pulls the mounting part through the locking part, the mounting part deforms and the mounting screws gradually disengage from the groove, causing the cover plate to be pried open between the position of the pressure relief fixing part and the enclosure to form a ventilation gap. The gas inside the enclosure can be discharged to the outside through the ventilation gap, quickly releasing the internal pressure, preventing the cover plate or other components from exploding, and improving safety performance. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the housing assembly provided in this application under normal conditions.

[0016] Figure 2 This is a structural diagram of the housing assembly provided in this application when the cover is opened.

[0017] Figure 3 A structural schematic diagram of the top cover and pressure relief fastener provided in this application.

[0018] Figure 4 An exploded view of the top cover and pressure relief fastener provided in this application.

[0019] Figure 5 The diagram shows the change in state of the pressure relief fastener provided in this application from no deformation to deformation.

[0020] Figure 6 A schematic diagram of the back of the cover plate provided in this application.

[0021] Figure 7 This is a structural schematic diagram of the pressure relief fastener, energy absorption fastener, and cover plate provided in this application.

[0022] Figure 8 Exploded view of the cover plate and energy-absorbing fastener provided in this application.

[0023] Figure 9 This is a structural schematic diagram of the energy-absorbing fastener provided in this application.

[0024] Figure 10 This is a schematic diagram showing the distribution of the pressure relief fasteners and energy absorption fasteners provided in this application.

[0025] Explanation of main component symbols

[0026] 100. Enclosure assembly; 10. Enclosure; 11. Base frame; 12. Top cover; 13. Opening; 14. Groove; 15. Through hole; 16. Screw hole; 17. Screw groove; 20. Cover plate; 21. Receiving groove; 22. Opening; 23. Relief opening; 30. Pressure relief fastener; 31. Mounting part; 32. Locking part; 33. Groove; 34. Threaded hole; 40. Mounting screw; 41. Screw part; 42. Head; 50. Energy-absorbing fastener; 51. Connecting hole; 52. Assembly hole; 53. Relief groove; 60. Fixing screw; 70. Assembly screw; 80. Locking screw. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments.

[0028] In the description of the embodiments in this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0029] This application provides a housing component and an energy storage device, which have the technical effect of improving safety.

[0030] Figure 1 This is a structural diagram of the housing assembly provided in this application under normal conditions.

[0031] like Figure 1As shown, this application embodiment first provides a housing assembly 100, which is applied to an energy storage device. Exemplarily, the energy storage device includes electronic components and the housing assembly 100. The electronic components are disposed within the housing assembly 100, and the housing assembly 100 protects the electronic components. The electronic components include, but are not limited to, an inverter module, a control module, a battery management module, passive components (such as capacitors and inductors), and sensors, and can be specifically configured according to the actual application scenario.

[0032] Figure 2 This is a structural diagram of the housing assembly provided in this application when the cover is opened. Figure 3 A structural schematic diagram of the top cover and pressure relief fastener provided in this application.

[0033] Please refer to the following: Figure 2 and Figure 3 The enclosure assembly 100 includes an enclosure 10, a cover plate 20, and a pressure relief fastener 30, wherein the pressure relief fastener 30 is connected between the enclosure 10 and the cover plate 20. Specifically, the enclosure 10 has an internal cavity in which electronic components are housed, and the enclosure 10 has an opening 13 communicating with the cavity. The cover plate 20 covers the opening 13 and is detachably connected to the enclosure 10. When the cover plate 20 is fixed to the enclosure 10, it shields and protects the electronic components inside the cavity. When the cover plate 20 is removed from the enclosure 10, personnel can enter the cavity through the opening 13 to perform maintenance and repair on the electronic components inside.

[0034] In the example of this application, the housing 10 includes a bottom frame 11 and a top cover 12, which are combined to form an integral unit. The bottom frame 11 and the top cover 12 enclose a receiving cavity. An opening 13 is provided on the surface of the top cover 12, and a cover plate 20 is installed on the top cover 12 so that the cover plate 20 and the top cover 12 form an upper and lower cover assembly structure. In other embodiments, the housing 10 may also be a separate bottom frame 11, with the top cover 12 and the cover plate 20 combined to form an integral cover. A receiving cavity is formed inside the bottom frame 11, and the opening 13 is formed at the cavity opening. A pressure relief fastener 30 is connected between the bottom frame 11 and the integral cover.

[0035] Figure 4 Exploded view of the top cover and pressure relief fastener provided for this application.

[0036] Please refer to the following: Figure 4The pressure relief fixing component 30 has a mounting part 31 and a locking part 32. The locking part 32 is fixedly connected to the cover plate 20, and the mounting part 31 has a groove 33 on its side. The housing 10 is equipped with mounting screws 40 corresponding to the groove 33. The mounting screws 40 pass through the groove 33 and are fixedly connected to the housing 10. When the internal pressure of the housing 10 increases, the cover plate 20 pulls the mounting part 31 through the locking part 32, causing the mounting part 31 to deform and causing the mounting screws 40 to at least partially disengage from the groove 33, thereby causing the cover plate 20 to at least partially disengage from the housing 10. The gap between the cover plate 20 and the housing 10 forms a venting gap 201.

[0037] Figure 5 The diagram shows the change in state of the pressure relief fastener provided in this application from no deformation to deformation.

[0038] Please refer to the following: Figure 5 For example, the cover plate 20 is provided with a locking screw 80, which passes through the cover plate 20 and is fixedly connected to the locking part 31.

[0039] During normal operation, the mounting screw 40 fixes the mounting part 31 to the housing 10 at the groove 33, and the locking screw 80 fixes the cover plate 20 to the locking part 32, so that the cover plate 20 is fixed to the housing 10.

[0040] When the internal pressure of the housing 10 increases, the air pressure impacts the cover plate 20. The cover plate 20 pulls the locking part 32 through the locking screw 80, and drives the mounting part 31 through the locking part 32. Since the mounting part 31 itself has a certain deformation capacity and the groove 33 is not completely closed, the mounting part 31 as a whole can deform in a direction away from the housing 10 and away from the mounting screw 40.

[0041] Thus, when the high pressure inside the housing 10 reaches the specified threshold, the cover plate 20 pulls the mounting part 31 through the locking part 32. The mounting part 31 deforms and causes the mounting screws 40 to gradually disengage from the groove 33. This causes the cover plate 20 to be pried open from the housing 10 at the position close to the pressure relief fixing part 30, forming a ventilation gap 201. The gas inside the housing 10 can be discharged to the outside through the ventilation gap 201, quickly releasing the internal pressure and preventing the cover plate 20 or other components from exploding, thus improving safety performance.

[0042] In some embodiments, the mounting portion 31 is provided with at least two grooves 33, which are spaced apart, and the locking portion 32 is located between the grooves 33. For example, grooves 33 are provided at both ends of the mounting portion 31, and the locking portion 32 is located in the middle of the mounting portion 31, i.e., between two grooves 33. In the example of this application, the mounting portion 31 is preferably rectangular to ensure that it can deform under the tension of the mounting screw 40 within a limited installation space. In other embodiments, the mounting portion 31 may also adopt other shapes such as waist-shaped, elongated, or rectangular.

[0043] The number and position of the mounting screws 40 correspond one-to-one with the number and position of the grooves 33. Each mounting screw 40 has a screw portion 41 and a head 42. The screw portion 41 passes through the groove 33 and is fixedly connected to the housing 10. Multiple screw portions 41 cooperate to position the side of the mounting portion 31. A portion of the head 42 abuts against the side of the mounting portion 31 away from the housing 10, so that the head 42 cooperates with the housing 10 to clamp both sides of the mounting portion 31.

[0044] Thus, the screw portions 41 located at both ends of the mounting portion 31 position the mounting portion 31 along direction X, and the head 42 and the housing 10 position the mounting portion 31 along direction Y, with direction X and direction Y being perpendicular to each other.

[0045] When the internal pressure of the housing 10 increases, the air pressure impacts the cover plate 20. The cover plate 20 pulls the locking screw 80 upward in the Y direction. The locking screw 80 drives the locking part 32 to pull the mounting part 31 upward in the Y direction, causing the mounting part 31 to bend and deform. During this process, the middle part of the mounting part 31 and the locking part 32 gradually spread apart from the outside of the housing 10 in the Y direction, and the two ends of the mounting part 31 gradually contract in the X direction, so that the two ends of the mounting part 31 bend relative to the middle part and spread the cover plate 20, so that an air gap 201 is formed between the cover plate 20 and the housing 10.

[0046] On the other hand, since the mounting screw 40 can separate from the groove 33 after the mounting part 31 is deformed, the force of the mounting part 31 pulling the mounting screw 40 upward in the direction Y can be reduced, thereby reducing the risk of the mounting screw 40 flying out of the housing 10 and further improving safety performance.

[0047] Figure 6 A schematic diagram of the back of the cover plate provided in this application. Figure 7 This is a structural schematic diagram of the pressure relief fastener, energy absorption fastener, and cover plate provided in this application.

[0048] Please refer to the following: Figure 6 and Figure 7In some embodiments, the locking part 32 is provided with a threaded hole 34 that penetrates the surface of the mounting part 31. The cover plate 20 has an opening 22 for a locking screw 80 to pass through, the locking screw 80 passing through the opening 22 and fixedly connected in the threaded hole 34. Exemplarily, the locking part 32 is integrally formed with the mounting part 31, the locking part 32 is fixed to one side of the mounting part 31, and the threaded hole 34 penetrates the opposite side of the mounting part 31. The length of the locking screw 80 is greater than the length of the mounting screw 40.

[0049] Even if the mounting part 31 bends and detaches from the housing 10, the locking part 32 remains fixed to the cover plate 20 by the locking action of the locking screw 80. This ensures that the pressure relief fixing part 30 is always fixed to the cover plate 20, preventing it from being blown away during pressure relief and further improving safety performance. Furthermore, during the deformation of the mounting part 31, the deformation is mainly concentrated at both ends near the groove 33, while the deformation is less pronounced in the middle section near the locking part 32. This ensures the connection strength between the locking part 32 and the cover plate 20, further preventing the pressure relief energy-absorbing part from detaching from the cover plate 20 and flying out.

[0050] In some embodiments, the housing 10 is provided with a groove 14, the bottom of which has a through hole 15 and a screw hole 16 for mounting screws 40. The mounting part 31 is received within the groove 14, and the locking part 32 passes through the through hole 15. The inner diameter of the through hole 15 is larger than the outer diameter of the locking part 32. The groove 14 provides mounting space for the mounting part 31, making its surface flush with the surface of the housing 10, preventing it from protruding from the housing 10 surface and jamming with the cover plate 20, reducing the distance between the housing 10 and the cover plate 20, and ensuring waterproof performance. The through hole 15 provides space for the locking part 32, facilitating its movement outward away from the through hole 15 when the mounting part 31 deforms.

[0051] Figure 8 Exploded view of the cover plate and energy-absorbing fastener provided in this application. Figure 9 This is a structural schematic diagram of the energy-absorbing fastener provided in this application.

[0052] Please refer to the following: Figure 8 and Figure 9In some embodiments, the housing assembly 100 further includes an energy-absorbing fastener 50, with a gap between the energy-absorbing fastener 50 and the pressure-relieving fastener 30. The energy-absorbing fastener 50 is fixed to the side of the cover plate 20 facing the housing 10, and the cover plate 20 is equipped with fixing screws 60. The fixing screws 60 pass through the cover plate 20 and the energy-absorbing fastener 50 and are fixedly connected to the housing 10. The energy-absorbing fastener 50 is used to support local positions of the cover plate 20 and enhance the structural toughness of the cover plate 20. When subjected to air pressure impact, it absorbs energy by deforming itself, reducing the risk of brittle fracture of the cover plate 20.

[0053] It is understandable that the housing 10 or cover plate 20, due to material limitations, typically have high hardness but relatively poor toughness. For example, their composition may contain a large amount of silicon, which increases the strength of the alloy but also reduces its toughness, making it prone to brittle fracture upon impact. The energy-absorbing fastener 50 in this embodiment has a certain degree of toughness. By being positioned between the cover plate 20 and the housing 10, the energy-absorbing fastener 50 can absorb kinetic energy and deform under air pressure impact on the cover plate 20, preventing brittle fracture at the connection between the cover plate 20 and the housing 10, thereby preventing the cover plate 20 from breaking and being blown out of the housing 10.

[0054] For example, the cover plate 20 facing the housing 10 is provided with a receiving groove 21 corresponding to the energy-absorbing fastener 50, and the energy-absorbing fastener 50 is adapted to be received in the receiving groove 21. The energy-absorbing fastener 50 is provided with at least one connecting hole 51 and a plurality of mounting holes 52, the plurality of mounting holes 52 are spaced apart, and the connecting hole 51 is located between the mounting holes 52.

[0055] The fixing screw 60 on the energy-absorbing fastener 50 is located between multiple assembly screws 70. The threaded connection of the fixing screw 60 is reinforced by the combined fixing effect of the multiple assembly screws 70, so as to prevent brittle fracture at the connection between the cover plate 20 and the fixing screw 60, which would cause the cover plate 20 or the fixing screw 60 to fly out.

[0056] The energy-absorbing fastener 50 is equipped with mounting screws 70, which pass through the mounting hole 52 and are fixedly connected to the cover plate 20. The housing 10 has screw slots 17 corresponding to the fixing screws 60, and the cover plate 20 has clearance openings 23 for the fixing screws 60 to pass through. The fixing screws 60 pass through the cover plate 20 and the connecting hole 51 from the side of the cover plate 20 away from the housing 10, and are fixedly connected to the screw slots 17 of the housing 10.

[0057] In this embodiment, both the pressure relief fixing member 30 and the energy absorption fixing member 50 can fix the cover plate 20 to the housing 10. That is, the cover plate 20 is fixed to the pressure relief fixing member 30 and the housing 10 by the locking screw 80, and the cover plate 20 is fixed to the housing 10 by the fixing screw 60. When it is necessary to open the cover plate 20, the cover plate 20 can be removed from the housing 10 by removing the locking screw 80 and the fixing screw 60, so as to facilitate the maintenance and repair of the electronic components inside the housing 10. After the operation is completed, the cover plate 20 can be fixed back to the housing 10 and fixed by the locking screw 80 and the fixing screw 60. The pressure relief fixing member 30 and the energy absorption fixing member 50 do not affect the opening and closing of the cover plate 20.

[0058] It is worth noting that the fixing screw 60 and locking screw 80 in this application are merely descriptions of screws installed at different locations, and do not imply that the fixing screw 60 and locking screw 80 have different shapes. In fact, the fixing screw 60 and locking screw 80 can be screws with the same structure. Since the locking screw 80 and fixing screw 60 use screws with the same structure, the screws used in fixing the cover plate 20 can be directly assembled without distinction, thereby improving assembly efficiency.

[0059] On the other hand, the pressure relief fastener 30 provides a soft fixation between the cover plate 20 and the housing 10. When the internal pressure of the housing 10 increases, the pressure relief fastener 30 allows individual parts of the cover plate 20 to separate from the housing 10. The energy-absorbing fastener 50 provides a hard fixation between the cover plate 20 and the housing 10. When the internal pressure of the housing 10 increases, the energy-absorbing fastener 50 ensures that individual parts of the cover plate 20 remain fixed to the housing 10. Thus, a ventilated gap 201 can be formed near the pressure relief fastener 30 to relieve pressure, while the area near the energy-absorbing fastener 50 remains fixed to the housing 10. The energy-absorbing fastener 50 deforms and absorbs kinetic energy, preventing partial breakage of the cover plate 20 and its ejection, reducing safety hazards and further improving safety performance.

[0060] In some embodiments, the energy-absorbing fastener 50 has a relief groove 53 that extends through one side of the energy-absorbing fastener 50 and communicates with the connecting hole 51. For example, the relief groove 53 is located on the side of the energy-absorbing fastener 50 away from the center of the cover plate 20, and extends through both sides of the energy-absorbing fastener 50. The relief groove 53 can increase the deformation range of the energy-absorbing fastener 50, thereby improving its energy-absorbing deformation capacity and preventing the cover plate 20 from cracking due to insufficient energy-absorbing deformation of the energy-absorbing fastener 50 under excessive explosive impact.

[0061] It is worth noting that the setting of the relief groove 53 can be configured according to the energy absorption deformation capacity requirements of the energy-absorbing fastener 50. That is, when there are multiple energy-absorbing fasteners 50, some of the energy-absorbing fasteners 50 are provided with one or more relief grooves 53, while other energy-absorbing fasteners 50 are not provided with relief grooves 53. This application does not impose any restrictions on this.

[0062] In the example of this application, there are multiple energy-absorbing fasteners 50, which are installed at different positions on the cover plate 20. The mechanical strength of the different energy-absorbing fasteners 50 is different, so that the support strength of the different energy-absorbing fasteners 50 at different positions on the cover plate 20 is not the same, so as to meet the pressure relief performance requirements or fixing strength requirements at different positions.

[0063] Multiple energy-absorbing fasteners 50 are defined as a first energy-absorbing fastener 50A and a second energy-absorbing fastener 50B. The mechanical strength of the first energy-absorbing fastener 50A is less than that of the second energy-absorbing fastener 50B. The length of the first energy-absorbing fastener 50A is less than that of the second energy-absorbing fastener 50B, and the number of mounting holes 52 in the first energy-absorbing fastener 50A is less than the number of mounting holes 52 in the second energy-absorbing fastener 50B.

[0064] Figure 10 This is a schematic diagram showing the distribution of the pressure relief fasteners and energy absorption fasteners provided in this application.

[0065] Please refer to the following: Figure 10 In this embodiment, the cover plate 20 is defined to have multiple corners along its periphery, and at least one of the multiple corners is provided with a pressure relief fixing member 30, while the remaining corners are provided with energy absorption fixing members 50.

[0066] When the internal pressure of the box 10 increases, the corner of the cover plate 20 near the pressure relief fixing member 30 can be opened, forming an air gap 201 between it and the box 10. Meanwhile, the other corners of the cover plate 20 remain fixed to the box 10 under the action of the energy-absorbing fixing member 50. In this way, the cover plate 20 can be prevented from being blown out while meeting the pressure relief performance.

[0067] In this embodiment, the cover plate 20 is defined to have a first side L1 and a second side L2. The first energy-absorbing fixing member 50A and the pressure-relieving fixing member 30 are located on the first side L1, and the second energy-absorbing fixing member 50B is located on the second side L2. When the internal pressure of the housing 10 increases, the corner of the first side L1 near the pressure-relieving fixing member 30 can be opened, while the corner of the first side L1 near the first energy-absorbing fixing member 50A remains fixed to the housing 10. The second side L2 as a whole remains fixed to the housing 10 under the action of the second energy-absorbing fixing member 50B. In this way, by utilizing the difference in mechanical strength between the first energy-absorbing fixing member 50A and the second energy-absorbing fixing member 50B, it can be ensured that one side of the cover plate 20 can generate a ventilation gap 201, while the other side of the cover plate 20 remains fixed to the housing 10.

[0068] For ease of understanding, the structure of the cover plate 20 is described below by way of example.

[0069] In the example of this application, the cover plate 20 is rectangular in shape, and the sides of the cover plate 20 are: a first side L1, a second side L2, a third side L3 and a fourth side L4. The first side L1 and the second side L2 are relatively distributed, and the third side L3 and the fourth side L4 are relatively distributed. The first side L1 and the second side L2 are the long sides of the cover plate 20, and the third side L3 and the fourth side L4 are the short sides of the cover plate 20. The first side L1 and the third side L3 form a corner P1, the third side L3 and the second side L2 form a corner P2, the second side L2 and the fourth side L4 form a corner P3, and the fourth side L4 and the first side L1 form a corner P4.

[0070] In the example of this application, there are two pressure relief fasteners 30, one of which is located at corner P1, and the other is located in the middle of the first side L1. There are four energy absorption fasteners 50, including one first energy absorption fastener 50A located at corner P4, and three second energy absorption fasteners 50B distributed at corners P2 and P3, and in the middle of the second side L2.

[0071] Thus, when the internal pressure of the housing 10 increases, the corner P1 of the cover plate 20, the middle of the first side L1, and the local positions near the corner P1 of the third side L3 can be opened to form a ventilation gap 201, while most other positions of the cover plate 20 remain fixed to the housing 10. This not only meets the pressure relief performance requirements of the cover plate 20, but also meets the overall fixing strength requirements of the cover plate 20.

[0072] This application also provides an energy storage device, which, for example, can be a photovoltaic inverter. The energy storage device includes electronic components and a housing assembly 100 as described in any of the above embodiments, with the electronic components disposed within the housing assembly 100.

[0073] When the high pressure inside the enclosure 10 reaches the specified threshold, the cover plate 20 pulls the mounting part 31 through the locking part 32. The mounting part 31 deforms and causes the mounting screws 40 to gradually disengage from the groove 33. This causes the cover plate 20 to be pushed apart from the enclosure 10 at the position close to the pressure relief fixing part 30, forming a ventilation gap 201. The gas inside the enclosure 10 can be discharged to the outside through the ventilation gap 201, quickly releasing the internal pressure and preventing the cover plate 20 or other components from exploding, thus improving safety performance.

[0074] It is worth noting that the various parameter settings involved in the embodiments of this application, such as the high pressure threshold when the cover plate 20 is opened, the opening angle of the cover plate 20, the size of the venting gap 201, the position or number of the pressure relief fixing component 30 and the energy absorption fixing component 50, the position or number of screws, etc., can all be configured according to actual needs such as the shape, material, thickness and other conditions of the pressure relief structure. The corresponding parameters can be adjusted adaptively, and this application does not impose any restrictions on this.

[0075] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments described above should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application.

Claims

1. A housing assembly, characterized in that, include: The box has an opening; A cover plate is provided over the opening; A pressure relief fastener is connected between the housing and the cover plate; wherein the pressure relief fastener has a mounting part and a locking part, the locking part is fixedly connected to the cover plate, and the side of the mounting part is provided with a groove; the housing is provided with mounting screws corresponding to the grooves, and the mounting screws pass through the grooves and are fixedly connected to the housing; When the internal pressure of the box increases, the cover plate pulls the mounting part through the locking part, causing the mounting part to deform and the mounting screw to at least partially disengage from the groove, thereby causing the cover plate to at least partially disengage from the box to form a ventilation gap.

2. The housing assembly as described in claim 1, characterized in that, The mounting portion is provided with a plurality of grooves, which are spaced apart from each other, and the locking portion is located between the plurality of grooves.

3. The housing assembly as described in claim 2, characterized in that, The mounting screw has a screw portion and a head. The screw portion passes through the groove and is fixedly connected to the housing. Multiple screw portions cooperate to position the side of the mounting portion, and the head cooperates with the housing to clamp both sides of the mounting portion.

4. The housing assembly as claimed in claim 1, characterized in that, The locking part is provided with a threaded hole that penetrates the surface of the mounting part. The cover plate is provided with a locking screw that passes through the cover plate and is fixedly connected to the threaded hole.

5. The housing assembly as described in claim 4, characterized in that, The housing is provided with a groove, and a through hole is provided at the bottom of the groove. The mounting part is received in the groove, and the locking part passes through the through hole.

6. The housing assembly as described in any one of claims 1 to 5, characterized in that, The housing assembly also includes an energy-absorbing fastener, which is fixed to the side of the cover plate facing the housing. The cover plate is equipped with fixing screws. The fixing screws pass through the cover plate and the energy-absorbing fastener and are fixedly connected to the housing.

7. The housing assembly as claimed in claim 6, characterized in that, The energy-absorbing fastener is provided with at least one connecting hole and multiple assembly holes, the multiple assembly holes are spaced apart, and the connecting hole is located between the assembly holes. The energy-absorbing fastener is provided with assembly screws, the assembly screws pass through the assembly holes and are fixedly connected to the cover plate; the fixing screws pass through the cover plate and the connecting holes and are fixedly connected to the housing.

8. The housing assembly as claimed in claim 6, characterized in that, The cover plate is defined to have multiple corners along its periphery, and the pressure relief fixing member is provided at at least one of the multiple corners, while the energy absorption fixing member is provided at the remaining corners of the multiple corners.

9. The housing assembly as claimed in claim 6, characterized in that, The energy-absorbing fastener has a clearance groove that extends through one side of the energy-absorbing fastener and communicates with the connecting hole.

10. An energy storage device, characterized in that, It includes electronic components and a housing assembly as described in any one of claims 1 to 9, wherein the electronic components are disposed within the housing assembly.

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