Explosion-proof valve, battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides an anti-explosion valve, a battery pack and electric equipment, the anti-explosion valve comprises a valve body and a sealing piece, the valve body is provided with a clamping structure, and the clamping structure is used for being clamped with an exhaust port of a battery shell to seal the exhaust port; the sealing piece is arranged on the valve body and surrounds the clamping structure, and the sealing piece is used for abutting against the battery shell to seal the exhaust port. The anti-explosion valve is simple in structure and good in sealing performance, and the use performance of the anti-explosion valve can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to an explosion-proof valve, a battery pack, and an electrical device. Background Technology

[0002] Power batteries are a core component of new energy vehicles, and their safety directly affects the overall safety performance of the vehicle. During use, repeated charging and discharging of the battery cells generates gas. To ensure pressure balance inside and outside the battery pack while maintaining its airtightness, explosion-proof valves are typically used as safety devices. When the internal pressure reaches the valve's opening pressure, it opens, releasing the gas generated by uncontrolled cell failure to the outside, thus reducing pressure and safety risks.

[0003] In related technologies, explosion-proof valves often employ a spring-loaded opening mechanism. The internal air pressure of the battery pack rapidly increases, causing the spring to deform and displace the valve body, opening the air passage to release pressure. The opening pressure of a spring-loaded explosion-proof valve can be adjusted by regulating the spring's elasticity. However, spring-loaded explosion-proof valves have a complex structure, and over time, the spring's sensitivity to pressure decreases significantly, leading to reduced sealing performance and ultimately affecting the valve's overall performance. Utility Model Content

[0004] This application provides an explosion-proof valve, a battery pack, and an electrical device. The explosion-proof valve has a simple structure and good sealing performance, which can improve the performance of the explosion-proof valve.

[0005] A first aspect of this application provides an explosion-proof valve, comprising at least:

[0006] The valve body is provided with a snap-fit ​​structure for snapping into the vent of the battery housing to seal the vent.

[0007] A sealing element is disposed on the valve body and surrounding the snap-fit ​​structure, the sealing element being used to abut against the battery housing to seal the vent.

[0008] This embodiment of the application features a snap-fit ​​structure on the valve body. This snap-fit ​​structure engages with the vent of the battery housing to seal the vent. The battery housing and valve body are connected via this snap-fit ​​structure, which is simple. Additionally, a sealing element is provided between the battery housing and the valve body. The sealing element is located on the valve body and surrounds the snap-fit ​​structure. The sealing element abuts against the battery housing to seal the vent. When the snap-fit ​​structure is in place, the sealing element is compressed and deformed, thereby achieving a sealing effect. Therefore, the explosion-proof valve provided by this embodiment has a simple structure and good sealing performance, thus improving the performance of the explosion-proof valve.

[0009] In one possible implementation, the snap-fit ​​structure includes a connecting portion and a snap-fit ​​portion, the connecting portion connecting the valve body and the snap-fit ​​portion being used to snap onto the inner edge of the exhaust port.

[0010] In one possible implementation, the valve body has a recess, and the snap-fit ​​structure is disposed within the recess.

[0011] In one possible implementation, the valve body is provided with a sealing groove, at least a portion of the seal is located within the sealing groove, the sealing groove being arranged around the snap-fit ​​structure.

[0012] In one possible implementation, the valve body includes a valve body and a boss, the recess is provided on the valve body, and the boss is provided on the side of the valve body opposite to the snap-fit ​​structure and is disposed opposite to the recess.

[0013] In one possible implementation, a plurality of first reinforcing ribs are also included, which are spaced apart on the outer periphery of the boss and connected to the valve body.

[0014] In one possible implementation, the number of the snap-fit ​​structures is multiple, and the multiple snap-fit ​​structures are spaced apart circumferentially along the seal.

[0015] In one possible implementation, a plurality of reinforcing structures are also included, with the plurality of reinforcing structures and the plurality of snap-fit ​​structures arranged alternately at intervals along the circumference of the seal.

[0016] In one possible implementation, a protective cover is also included, which is disposed on the side of the valve body opposite to the seal.

[0017] In one possible implementation, the protective cover is provided with a mounting hole, and a connecting post is provided on the side of the valve body facing the protective cover, the connecting post passing through the mounting hole and being thermally fused to the protective cover.

[0018] In one possible implementation, the protective cover includes a connected flat plate portion and an extension portion;

[0019] The extension is disposed around the flat plate portion and extends toward the valve body.

[0020] In one possible implementation, the protective cover is further provided with a plurality of second reinforcing ribs on the side facing the valve body;

[0021] Multiple second reinforcing ribs are spaced apart on the inner periphery of the extension and connected to the flat plate.

[0022] In one possible implementation, the seal includes a connected sealing ring and an extension ring, the extension ring being disposed around the sealing ring and extending in a direction away from the valve body.

[0023] In one possible implementation, the snap-fit ​​structure is a plastic component, and / or the valve body is a plastic component.

[0024] A second aspect of this application provides a battery pack, including the battery housing and any of the explosion-proof valves described above, wherein the battery housing is provided with a vent, and the snap-fit ​​structure snaps into the vent to seal the vent.

[0025] The seal abuts between the battery housing and the valve body to seal the vent.

[0026] The embodiments of this application improve the explosion-proof performance of the battery pack by incorporating the aforementioned explosion-proof valve within the battery pack.

[0027] In one possible implementation, a water-blocking rib is provided on the side of the battery housing facing the valve body, and the water-blocking rib is arranged around the exhaust port.

[0028] In one possible implementation, the water-blocking rib is also provided with a notch for replacing the valve body.

[0029] A third aspect of this application provides an electrical device comprising at least the battery pack described above or the explosion-proof valve described above.

[0030] The embodiments of this application can improve the performance of electrical equipment by installing the aforementioned battery pack or explosion-proof valve in the electrical equipment. Attached Figure Description

[0031] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a disassembled structure of an explosion-proof valve provided in an embodiment of this application;

[0033] Figure 2 A schematic diagram showing another disassembled structure of the explosion-proof valve provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of an overall structure of an explosion-proof valve provided in an embodiment of this application;

[0035] Figure 4 A schematic diagram of another overall structure of the explosion-proof valve provided in an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the valve body in an explosion-proof valve provided in an embodiment of this application;

[0037] Figure 6 This is another structural schematic diagram of the valve body in the explosion-proof valve provided in the embodiments of this application;

[0038] Figure 7 This is another structural schematic diagram of the valve body in the explosion-proof valve provided in the embodiments of this application;

[0039] Figure 8 This is a schematic diagram of the structure of the mounting component in the explosion-proof valve provided in the embodiments of this application;

[0040] Figure 9 This is a schematic diagram of the structure of the protective cover in the explosion-proof valve provided in the embodiments of this application;

[0041] Figure 10 This is a schematic diagram of the structure of the explosion-proof valve provided in this application embodiment when the valve body and the protective cover are engaged.

[0042] Figure 11 This is another structural diagram of the explosion-proof valve provided in this application embodiment, showing the valve body and protective cover in combination.

[0043] Figure label:

[0044] 100-Explosion-proof valve;

[0045] 110-Valve body; 1101-Valve body; 1102-Boss;

[0046] 111-Snap-fit ​​structure; 1111-Connecting part; 1112-Snap-fitting part; 112-Recessed part; 113-Sealing groove; 114-Connecting post;

[0047] 120 - Seal;

[0048] 121 - Sealing ring; 122 - Extension ring;

[0049] 130 - First reinforcing rib;

[0050] 140 - Reinforced structure;

[0051] 150 - Protective cover; 1501 - Flat plate section; 1502 - Extension section;

[0052] 151 - Mounting hole; 152 - Second reinforcing rib;

[0053] 200-Battery casing; 210-Exhaust port; 220-Water baffle; 221-Notch. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0055] With the development of new energy sources, more and more fields are adopting new energy sources as power sources. Due to their advantages such as high energy density, rechargeability, safety, and environmental friendliness, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0056] Power batteries are a core component of new energy vehicles, and their safety directly affects the overall safety performance of the vehicle.

[0057] During the use of power batteries, gas is generated due to repeated charging and discharging of the cells. In order to ensure the gas pressure balance inside and outside the power battery, and at the same time to ensure the airtightness of the power battery, an explosion-proof valve is usually required on the battery casing as an explosion-proof safety device.

[0058] In addition, a large amount of gas will be generated when the battery pack experiences thermal runaway (cell explosion). At this time, it is necessary to quickly expel the large amount of gas from the battery pack to avoid the battery pack casing from rupturing and endangering personal safety. Usually, an explosion-proof valve is also equipped on the battery pack casing as an explosion-proof safety device.

[0059] In related technologies, in order to meet the need for venting after thermal runaway of batteries or battery packs, explosion-proof valves need to be installed on the casing of batteries or battery packs. When the gas pressure inside the casing reaches the opening pressure of the explosion-proof valve, the explosion-proof valve will open, and the gas generated inside the casing due to the cell runaway will be discharged to the outside of the casing, which can achieve the purpose of depressurization and reduce safety risks.

[0060] Currently, most explosion-proof valves use a spring-loaded opening mechanism. When the internal air pressure rises rapidly, the spring is deformed under the action of the internal air pressure, causing the valve head to shift and opening the air passage to release air and relieve pressure. The opening pressure of the spring-loaded explosion-proof valve can be adjusted by adjusting the spring's elastic coefficient. However, the spring-loaded explosion-proof valve has a complex structure, and the spring's sensitivity to pressure will decrease significantly over time, leading to reduced sealing performance and potentially affecting the valve's performance.

[0061] To address the aforementioned problems, this application provides a novel explosion-proof valve, battery pack, and electrical equipment. The explosion-proof valve includes a valve body and a sealing element. The valve body has a snap-fit ​​structure for engaging with the vent of the battery casing to seal the vent. The sealing element is disposed on the valve body and surrounds the snap-fit ​​structure, and abuts against the battery casing to seal the vent. The explosion-proof valve provided by this application has a simple structure and good sealing performance, thereby improving the performance of the explosion-proof valve.

[0062] The following detailed description, in conjunction with the accompanying drawings, describes the explosion-proof valve, battery, battery pack, and electrical equipment provided in the embodiments of this application.

[0063] Figure 1 This is a schematic diagram showing a disassembled structure of an explosion-proof valve provided in an embodiment of this application. Figure 2 This is a schematic diagram of another disassembled structure of the explosion-proof valve provided in an embodiment of this application. Figure 3 This is a schematic diagram of an overall structure of an explosion-proof valve provided in an embodiment of this application. Figure 4 This is a schematic diagram of another overall structure of the explosion-proof valve provided in an embodiment of this application.

[0064] Reference Figures 1 to 4 As shown, this application embodiment provides an explosion-proof valve 100, which may include at least a valve body 110 and a sealing element 120. The valve body 110 may be provided with a snap-fit ​​structure 111 (see...). Figure 2 As shown, the snap-fit ​​structure 111 is used to snap into the vent 210 of the battery housing 200 to seal the vent 210 of the battery housing 200.

[0065] It should be noted that the snap-fit ​​structure 111 can be a snap, a tenon, a protrusion, or other structure. This application embodiment does not limit this, nor is it limited to the above examples.

[0066] A seal 120 is disposed on the valve body 110 and surrounds the snap-fit ​​structure 111, wherein, it is understood, the seal 120 is used to abut against the battery housing 200 to seal the vent 210 of the battery housing 200.

[0067] A snap-fit ​​structure 111 is provided on the valve body 110, which snaps against the vent 210 of the battery housing 200 to seal the vent 210. The battery housing 200 and the valve body 110 are connected by the snap-fit ​​structure 111. The snap-fit ​​structure 111 has a simple structural design. In addition, a sealing element 120 is provided between the battery housing 200 and the valve body 110. The sealing element 120 is located on the valve body 110 and surrounds the snap-fit ​​structure 111. The sealing element 120 abuts against the battery housing 200 to seal the vent 210. When the snap-fit ​​structure 111 is installed in place, the sealing element 120 will be compressed and deformed, thereby achieving a sealing effect. Therefore, the explosion-proof valve 100 provided in this embodiment has a simple structure and good sealing performance, thereby improving the performance of the explosion-proof valve 100.

[0068] It should be noted that, in the embodiments of this application, during the installation of the explosion-proof valve 100, the installation status of the explosion-proof valve 100 can be determined by the sound of the snap-fit ​​structure tightening and the gap of the sealing surface after the snap-fit ​​structure is engaged.

[0069] In addition, it is easy to understand that the explosion-proof valve 100 provided in this application embodiment can adjust different opening pressures by adjusting the number of snap-fit ​​structures 111. The opening pressure will also increase when the number of snap-fit ​​structures 111 increases.

[0070] Figure 5 This is a schematic diagram of the structure of the valve body 110 in the explosion-proof valve 100 provided in the embodiments of this application. Figure 6 This is a schematic diagram of another structure of the valve body 110 in the explosion-proof valve 100 provided in the embodiments of this application. Figure 7 This is another structural schematic diagram of the valve body 110 in the explosion-proof valve 100 provided in the embodiments of this application. Figure 8 This is a schematic diagram of the structure of the battery housing 200 in the explosion-proof valve 100 provided in the embodiments of this application.

[0071] like Figure 5 As shown in the embodiment of this application, the snap-fit ​​structure 111 may include a connecting portion 1111 and a snap-fit ​​portion 1112. The connecting portion 1111 connects the valve body 110 and the snap-fit ​​portion 1112, and the snap-fit ​​portion 1112 is used to snap onto the inner edge of the exhaust port 210 (see...). Figure 8 As shown), the battery housing 200 and the valve body 110 are connected by a snap-fit ​​structure 111.

[0072] It is understood that, in the embodiments of this application, such as Figure 5 As shown, there can be multiple snap-fit ​​structures 111, and these multiple snap-fit ​​structures 111 can be spaced apart circumferentially along the seal 120. For example, the number of snap-fit ​​structures 111 can be one, two, three, four, five, six, or more, and this embodiment does not limit this.

[0073] Of course, in some embodiments, when the number of snap-fit ​​structures 111 is one, the snap-fit ​​structure 111 can be a ring structure to achieve a better snap-fit ​​effect.

[0074] In some other embodiments, the battery housing 200 and the valve body 110 can also be connected in other ways. This application does not limit this, nor is it limited to the above examples.

[0075] It is understood that in the embodiments of this application, the snap-fit ​​structure 111 can be a plastic part. Specifically, the material used for the snap-fit ​​structure 111 can be plastic, polyurethane, or other materials. The embodiments of this application do not limit the specific material of the snap-fit ​​structure 111, nor are they limited to the above examples.

[0076] During use, the explosion-proof valve 100 is opened by the deformation of the snap-fit ​​structure 111 caused by the internal air pressure and temperature shock of the battery or battery pack.

[0077] This embodiment uses a plastic valve body 110. Compared to the spring-opening scheme in related technologies, the plastic snap-fit ​​explosion-proof valve 100 has a simpler structural design. Under normal temperature conditions, the explosion-proof valve 100 has a high destructive pressure and is not easily opened, exhibiting excellent sealing performance and eliminating the risk of accidental opening. It also has excellent performance in preventing mud and sand from entering. When the gas pressure and temperature inside the battery or battery pack increase for a short period of time, the high temperature impacts the plastic snap-fit ​​structure 111, softening the product structure. The instantaneous accumulated pressure can cause the explosion-proof valve 100 to spring open, meeting the opening pressure requirements of the battery or battery pack. After opening, the valve body 110 detaches, and there is no structural obstruction to the vent hole 210, resulting in smoother flow and a lower risk of blockage.

[0078] It should be noted that the thickness of the battery housing 200 and the location and size of the vent 210 on the battery housing 200 must meet the installation requirements of the valve body 110. For example, the thickness of the battery housing 200 needs to match the snap-fit ​​height of the snap-fit ​​structure 111; adjusting the snap-fit ​​height of the snap-fit ​​structure 111 can accommodate battery housings 200 of different thicknesses. Similarly, the location of the vent 210 on the battery housing 200 must match the design location of the snap-fit ​​structure 111, and the size of the vent 210 on the battery housing 200 must also match the size design of the snap-fit ​​structure 111.

[0079] In other words, the thickness of the battery housing 200 and the location of the exhaust port 210 on the battery housing 200 can be flexibly set according to the installation requirements of the valve body 110, and this application embodiment does not limit this.

[0080] In addition, the flatness of the battery housing 200 also needs to meet the sealing requirements. For example, the roughness and flatness of the battery housing 200 can be subject to certain restrictions to meet the sealing requirements.

[0081] like Figure 5 As shown in the embodiment of this application, the valve body 110 may also be provided with a recess 112, and the battery housing 200 is disposed in the recess 112.

[0082] Continue to refer to Figure 5 As shown in the embodiment of this application, a sealing groove 113 may also be provided on the valve body 110, and at least a portion of the sealing member 120 may be located in the sealing groove 113, with the sealing groove 113 surrounding the snap-fit ​​structure 111.

[0083] Additionally, it should be noted that in this embodiment, after the seal 120 is installed and tightened, a gap still exists inside the sealing groove 113. Air pressure can further push it up, and the accumulated impact of internal temperature will soften the outer wall of the snap-fit ​​structure 111. As the pressure increases, the valve body 110 can be displaced to release pressure. Further softening and deformation of the snap-fit ​​structure 111 by the high-temperature gas, combined with the pressure, allows the valve body 110 to detach. After the valve body 110 detaches, the vent hole 210 on the battery casing 200 is unobstructed, allowing for smooth venting.

[0084] It should be noted that, in this embodiment, the valve body 110 and the seal 120 can be integrally formed. The seal 120 can be integrally connected to the sealing groove 113 of the valve body 110 using integral molding technology. Compared with a separate design of the seal 120 and the valve body 110, the entire installation process will be more reliable.

[0085] Similarly, the valve body 110 can also be a plastic part. Specifically, the material used for the valve body 110 can be plastic, polyurethane, or other materials. The embodiments of this application do not limit the specific material of the valve body 110, nor are they limited to the examples mentioned above.

[0086] It should be noted that the embodiments of this application use plastic injection molding. The material requirements are mainly based on the product performance requirements and are not limited to a certain material. For example, if there is a need for hot melt welding, raw materials with the performance of that process need to be selected.

[0087] Alternatively, in one possible implementation, the seal 120 can be an umbrella-shaped structure. See specifically... Figure 1 As shown in the embodiment of this application, the seal 120 may include a connected sealing ring 121 and an extension ring 122. The extension ring 122 may be disposed around the sealing ring 121 and extend in a direction away from the valve body 110.

[0088] Of course, in some other embodiments, the seal 120 can also be of other shapes, as long as it can achieve a good sealing effect.

[0089] In the embodiments of this application, such as Figures 5 to 7 As shown, the valve body 110 may include a valve body 1101 and a boss 1102. The recess 112 may be provided on the valve body 1101. Moreover, the boss 1102 is provided on the side of the valve body 1101 away from the snap-fit ​​structure 111 and is provided opposite to the recess 112.

[0090] like Figure 7 As shown in the embodiment of this application, the explosion-proof valve 100 may further include a plurality of first reinforcing ribs 130, which may be spaced apart on the outer periphery of the boss 1102 and connected to the valve body 1101. The first reinforcing ribs 130 can serve to strengthen the valve.

[0091] In one possible implementation, the plurality of first reinforcing ribs 130 may be evenly spaced on the outer periphery of the boss 1102.

[0092] In this embodiment, the explosion-proof valve 100 may further include multiple reinforcing structures 140, such as... Figure 5 As shown, the multiple reinforcing structures 140 and multiple snap-fit ​​structures 111 may be alternately spaced along the circumference of the seal 120.

[0093] It should be noted that in the embodiments of this application, the explosion-proof valve 100 may adopt a circular structure design, or in some other embodiments, the explosion-proof valve 100 may adopt a structure design of other shapes, and the embodiments of this application do not limit this.

[0094] Figure 9 This is a schematic diagram of the structure of the protective cover in the explosion-proof valve 100 provided in the embodiment of this application. Figure 10 This is a schematic diagram of the structure of the explosion-proof valve 100 provided in this application embodiment when the valve body 110 is engaged with the protective cover. Figure 11 This is another structural schematic diagram of the explosion-proof valve 100 provided in this application embodiment when the valve body 110 is engaged with the protective cover.

[0095] In the embodiments of this application, see Figures 9 to 11 As shown in the embodiment of this application, the explosion-proof valve 100 may further include a protective cover 150, which is disposed on the side of the valve body 110 facing away from the seal 120. By providing the protective cover 150 on the side of the valve body 110 facing away from the seal 120, the protection capability against external foreign object impacts can be improved.

[0096] It should be noted that, in the embodiments of this application, the protective cover 150 and the valve body 110 may be connected by snap-fit, adhesive, screw, or fusion, etc., and the embodiments of this application do not limit this, nor are they limited to the above examples.

[0097] like Figure 9 and Figure 10 As shown in this embodiment, the protective cover 150 may be provided with a mounting hole 151, and the valve body 110 may be provided with a connecting post 114 on the side facing the protective cover 150 (see...). Figure 6 As shown), the connecting post 114 can pass through the mounting hole 151 and be heat-fused to the protective cover 150.

[0098] Specifically, in this embodiment, the mounting hole 151 on the protective cover 150 and the connecting post 114 on the valve body 110 can be connected by hot-melt welding. Thus, when the protective cover 150 and the valve body 110 are connected, the protective cover 150 is fixed to the valve body 110 using a hot-melt welding device, forming a reliable and stable connection structure (see...). Figure 11 (As shown).

[0099] In some embodiments, a connecting post 114 may be provided on the side of the protective cover 150 facing the valve body 110, and a mounting hole 151 may be provided on the side of the valve body 110 facing the protective cover 150. The connecting post 114 on the protective cover 150 and the mounting hole 151 on the valve body 110 may be connected by hot melt welding.

[0100] In one possible implementation, the positions of the mounting holes 151 and the connecting posts 114 can correspond one-to-one to achieve a better connection effect. Furthermore, this embodiment does not limit the size design of the mounting holes 151, as long as they can fit well with the connecting posts 114. The size of the mounting holes 151 can be adjusted to meet the needs of different products.

[0101] like Figure 10 As shown in the embodiments of this application, the protective cover 150 may include a connected flat plate portion 1501 and an extension portion 1502, wherein, as Figure 11 As shown, the extension 1502 is disposed around the flat plate portion 1501, and the extension 1502 extends toward the valve body 110.

[0102] It is understood that, in this embodiment of the application, a plurality of second reinforcing ribs 152 may also be provided on the side of the protective cover 150 facing the valve body 110. By providing second reinforcing ribs 152 on the side of the protective cover 150 facing the valve body 110, the overall structural strength can be improved, thereby enhancing the impact resistance of external foreign objects.

[0103] In one possible implementation, the plurality of second reinforcing ribs 152 may be spaced apart on the inner periphery of the extension 1502 and connected to the flat plate 1501.

[0104] In addition, it is understood that the explosion-proof valve 100 provided in this application embodiment may also not include the protective cover 150. Without the protective cover 150, since the valve body 110 is designed with a first reinforcing rib 130 on the side facing away from the battery housing 200, when an external foreign object is impacted, it will first contact the first reinforcing rib 130, making the structural strength more reliable.

[0105] It should be noted that, since a connecting post 114 can also be designed on the side of the valve body 110 facing away from the battery casing 200, the explosion-proof valve 100 provided in this embodiment can be designed with or without the connecting post 114. The connecting post 114 can be connected to the protective cover 150 and then welded to fix the protective cover 150. Therefore, when there is no obstruction at the position of the valve body 110, the option with the protective cover 150 can be selected, as the protective cover 150 has stronger impact resistance. When there is obstruction at the position of the valve body 110, there is no need to add the protective cover 150, which can save costs.

[0106] Furthermore, the specific shape of the protective cover 150 is not limited in the embodiments of this application, and the protective cover 150 can have a variety of shapes and structures.

[0107] This application embodiment also provides a battery pack, which may include a battery housing 200 and the aforementioned explosion-proof valve 100. The battery housing 200 may be provided with an exhaust port 210, and a snap-fit ​​structure 111 snaps into the exhaust port 210 to close the exhaust port 210. A sealing member 120 abuts between the battery housing 200 and the valve body 110 to seal the exhaust port 210.

[0108] like Figure 8 As shown in this embodiment, a water-retaining rib 220 can also be provided on the side of the battery housing 200 facing the valve body 110, which can improve the resistance to water flow impact. Specifically, when the battery housing 200 is connected to the valve body 110, the water-retaining rib 220 can be arranged around the exhaust port 210.

[0109] Continue to refer to Figure 8 As shown in the embodiment of this application, a notch 221 may also be provided on the water-blocking rib 220, and the notch 221 can be used to replace the valve body 110 during use.

[0110] In addition, when the battery housing 200 and the valve body 110 are engaged, the water-blocking rib 220 on the battery housing 200 is set on the outer periphery of the exhaust port 210. The water-blocking rib 220 can prevent external water flow from directly impacting the sealing position between the battery housing 200 and the valve body 110, which could lead to sealing failure.

[0111] Furthermore, in one possible implementation, the extension 1502 can be mounted on the water-retaining rib 220 of the battery housing 200. Specifically, the extension 1502 of the protective cover 150 can wrap around the water-retaining rib 220 of the battery housing 200 to form an overlapping and staggered structure, which can further enhance the ability to withstand water flow impact.

[0112] The extension 1502 of the protective cover 150 works in conjunction with the water-retaining rib 220 of the battery casing 200 to further enhance the ability to resist water flow impact and meet higher protection level requirements.

[0113] The embodiments of this application improve the explosion-proof performance of the battery pack by providing the explosion-proof valve 100 in the battery pack.

[0114] In addition, this application embodiment also provides an electrical device, which may include at least the battery pack or the explosion-proof valve described above.

[0115] The electrical equipment of this utility model can be conventional electrical equipment in the field, such as power equipment (e.g., electric vehicles), electronic equipment (e.g., computers, mobile phones, digital cameras, printers, fax machines, etc.), wearable devices (e.g., watches, bracelets, VR glasses, etc.), and home appliances (e.g., air conditioners, refrigerators, washing machines, microwave ovens, etc.), etc., and there are no particular limitations.

[0116] Taking a vehicle as an example, the vehicle can be a sedan, bus, or truck. For instance, the vehicle can be an electric vehicle (EV), a pure electric vehicle / battery electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle, or any vehicle equipped with a battery.

[0117] The vehicle may also include a body, axles, and a motor, wherein the battery pack, axles, and motor may all be mounted on the body. The battery pack may be electrically connected to the motor, and the motor may be connected to the axle. The battery pack provides power to the motor, enabling it to rotate. During rotation, the motor drives the axle to rotate, thus allowing the vehicle to move.

[0118] The vehicle body may include a vehicle chassis and a body mounted on the chassis. The body may have a passenger compartment, which may include a driver's seat, passenger seats, etc., where the driver can operate the vehicle. For example, the vehicle body may also include structural components such as a steering wheel, clutch, and brakes to enable the vehicle to perform its full functions; this application does not impose any limitations on these components.

[0119] The embodiments of this application can improve the performance of electrical equipment by installing the aforementioned battery pack or explosion-proof valve in the electrical equipment.

[0120] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0121] In the description of this utility model, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0122] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An explosion-proof valve, characterized in that, At least including: The valve body is provided with a snap-fit ​​structure for snapping into the vent of the battery housing to seal the vent. A sealing element is disposed on the valve body and surrounding the snap-fit ​​structure, the sealing element being used to abut against the battery housing to seal the vent.

2. The explosion-proof valve according to claim 1, characterized in that, The snap-fit ​​structure includes a connecting part and a snap-fit ​​part. The connecting part connects the valve body and the snap-fit ​​part, and the snap-fit ​​part is used to snap onto the inner edge of the exhaust port.

3. The explosion-proof valve according to claim 1, characterized in that, The valve body has a recessed portion, and the snap-fit ​​structure is disposed within the recessed portion.

4. The explosion-proof valve according to claim 1, characterized in that, The valve body is provided with a sealing groove, at least a portion of the sealing element is located in the sealing groove, and the sealing groove is arranged around the snap-fit ​​structure.

5. The explosion-proof valve according to claim 3, characterized in that, The valve body includes a valve body and a boss. The recess is provided on the valve body, and the boss is provided on the side of the valve body away from the snap-fit ​​structure and is opposite to the recess.

6. The explosion-proof valve according to claim 5, characterized in that, It also includes a plurality of first reinforcing ribs, which are spaced apart on the outer periphery of the boss and connected to the valve body.

7. The explosion-proof valve according to claim 1, characterized in that, The number of the snap-fit ​​structures is multiple, and the multiple snap-fit ​​structures are arranged at intervals along the circumference of the seal.

8. The explosion-proof valve according to claim 7, characterized in that, It also includes multiple reinforcing structures, and the multiple reinforcing structures and multiple snap-fit ​​structures are arranged alternately and at intervals along the circumference of the seal.

9. The explosion-proof valve according to any one of claims 1-8, characterized in that, It also includes a protective cover, which is disposed on the side of the valve body opposite to the seal.

10. The explosion-proof valve according to claim 9, characterized in that, The protective cover is provided with a mounting hole, and a connecting post is provided on the side of the valve body facing the protective cover. The connecting post passes through the mounting hole and is thermally fused to the protective cover.

11. The explosion-proof valve according to claim 9, characterized in that, The protective cover includes a connected flat plate portion and an extension portion; The extension is disposed around the flat plate portion and extends toward the valve body.

12. The explosion-proof valve according to claim 11, characterized in that, The protective cover is also provided with multiple second reinforcing ribs on the side facing the valve body; Multiple second reinforcing ribs are spaced apart on the inner periphery of the extension and connected to the flat plate.

13. The explosion-proof valve according to any one of claims 1-8, characterized in that, The seal includes a connected sealing ring and an extension ring, the extension ring being disposed around the sealing ring and extending in a direction away from the valve body.

14. The explosion-proof valve according to any one of claims 1-8, characterized in that, The snap-fit ​​structure is made of plastic, and / or the valve body is made of plastic.

15. A battery pack, characterized in that, Includes the battery housing and the explosion-proof valve according to any one of claims 1-14, wherein the battery housing is provided with a vent, and the snap-fit ​​structure snaps into the vent to seal the vent; The seal abuts between the battery housing and the valve body to seal the vent.

16. The battery pack according to claim 15, characterized in that, A water-blocking rib is provided on the side of the battery housing facing the valve body, and the water-blocking rib is arranged around the exhaust port.

17. The battery pack according to claim 16, characterized in that, The water-blocking rib is also provided with a notch, which is used to replace the valve body.

18. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 15-17 or the explosion-proof valve according to any one of claims 1-14.

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