Explosion-proof valve, sealing assembly thereof and power battery system

Abstract

The utility model relates to the technical field of anti-explosion valves, and discloses an anti-explosion valve and a sealing assembly thereof, and a power battery system, the sealing assembly comprises a valve body, the middle part of which is provided with a pressure relief channel; the protective cover is arranged on the pressure relief channel of the valve body in a covering mode and comprises a connecting part, and the connecting part extends to the inner side of the pressure relief channel; the sealing assembly further comprises an elastic mechanism, the elastic mechanism is arranged on the connecting part, and the elastic mechanism comprises a convex ridge and a connecting column; the protective cover abuts against the pressure relief channel in a sealed mode through the protruding ridge. A clamping groove matched with the connecting column is further formed in the inner side of the pressure relief channel, and the connecting column is arranged in the clamping groove; the connecting column is provided with a clamping edge used for limiting the protective cover, and the clamping edge is arranged on the side, away from the protective cover, of the clamping groove. The sealing assembly is simple in structure and low in manufacturing cost, and the use stability of the sealing assembly and the anti-explosion valve thereof can be ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of explosion-proof valves, and particularly relates to an explosion-proof valve and a sealing assembly and a power battery system thereof. BACKGROUND

[0002] When the battery pack is in thermal runaway short circuit and the ambient temperature continues to rise, the existing power battery system generally realizes exhaust and pressure relief through a top pin type explosion-proof valve or a spring type explosion-proof valve to play a role in explosion prevention. Although the top pin type explosion-proof valve or the spring type explosion-proof valve can realize pressure relief effect, the internal valve core structure is relatively complex, the manufacturing cost is high, and the explosion-proof valve of this type cannot form a straight-through barrier-free pressure relief channel, which is not conducive to rapid and continuous exhaust and pressure relief requirements.

[0003] In order to simplify the structure of the explosion-proof valve, some existing explosion-proof valves are provided with a protective cover on the pressure relief channel of the valve body to realize sealing, and when the battery pack is in thermal runaway short circuit and needs to be relieved, the internal gas pressure will rush out the protective cover to realize rapid pressure relief. The pressure relief channel will not be hindered by the valve core, thereby realizing the simplification of the structure under the premise of ensuring the pressure relief efficiency. However, if a traditional protective cover is installed on the pressure relief channel of the valve body to realize the sealing function, the force between the protective cover and the valve body is weak, and the protective cover is easy to be separated from the valve body under the action of vibration, impact and the like, thereby causing the explosion-proof valve to fail. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems of the prior art, the application provides an explosion-proof valve, a sealing assembly thereof and a power battery system, which can improve the use reliability of the explosion-proof valve.

[0005] In a first aspect, the application discloses a sealing assembly of an explosion-proof valve, which comprises:

[0006] a valve body, a pressure relief channel being arranged in the middle of the valve body; and

[0007] a protective cover, which is arranged on the pressure relief channel of the valve body and comprises a connecting portion, the connecting portion extending to the inner side of the pressure relief channel;

[0008] The sealing assembly further comprises an elastic mechanism, the elastic mechanism being arranged on the connecting portion, the elastic mechanism comprising a ridge and a connecting column; the protective cover is sealed and abuts against the pressure relief channel through the ridge; the inner side of the pressure relief channel is further provided with a clamping groove matched with the connecting column, and the connecting column is arranged in the clamping groove;

[0009] The connecting column is provided with a clamping edge for limiting the protective cover, and the clamping edge is arranged on the side of the clamping groove away from the protective cover.

[0010] In an embodiment, the elastic mechanism is arranged at the edge of the connecting portion; or

[0011] The elastic mechanism is integrally formed with the connecting portion.

[0012] In an embodiment, the elastic mechanism comprises at least two connecting columns, which are evenly distributed on the elastic mechanism.

[0013] In an embodiment, at least one of the connecting columns extends an extension at an end away from the clamping groove, and a limiting structure is arranged at an end of the extension.

[0014] In an embodiment, the limiting structure has a width greater than that of the clamping edge.

[0015] In an embodiment, the clamping groove is an arcuate groove.

[0016] In an embodiment, the connecting columns and the ridges are respectively connected with the connecting portion; or

[0017] The connecting columns and the ridges are integrally formed.

[0018] In an embodiment, the sealing assembly further comprises a waterproof and breathable membrane, which is arranged on the protective cover and covers the pressure relief passage.

[0019] A gap for air permeation is arranged between the protective cover and the valve body, an air permeation passage is arranged on the connecting portion, and the pressure relief passage is in communication with the outside through the waterproof and breathable valve, the air permeation passage and the gap.

[0020] In a second aspect, the application further discloses an explosion-proof valve, which comprises the sealing assembly according to any one of the above.

[0021] In a third aspect, the application further discloses a power battery system, which comprises:

[0022] a box in which a power battery is arranged; and

[0023] an explosion-proof valve installed on the box, wherein the explosion-proof valve is the explosion-proof valve as described above.

[0024] The explosion-proof valve, the sealing assembly thereof and the power battery system provided by the application have the following advantages: the elastic mechanism is arranged on the connecting portion of the protective cover, the ridges on the elastic mechanism are used to realize the sealing between the protective cover and the pressure relief passage, the clamping edge of the connecting column is used to realize the limiting of the protective cover by the clamping groove on the valve body, so that the protective cover is prevented from being separated from the valve body under the action of vibration or impact. The sealing assembly has a simple structure, low manufacturing cost and stable use stability. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the sealing assembly of the explosion-proof valve in the embodiment of the present application.

[0026] Figure 2 It is a sectional structure schematic view of the sealing assembly of the explosion-proof valve in the embodiment of the present application.

[0027] Figure 3 It is another sectional structure schematic view of the sealing assembly of the explosion-proof valve in the embodiment of the present application.

[0028] Figure 4 It is another structure schematic view of the sealing assembly of the explosion-proof valve in the embodiment of the present application.

[0029] Figure 5 It is still another sectional structure schematic view of the sealing assembly of the explosion-proof valve in the embodiment of the present application.

[0030] Figure 6 It is a structure schematic view of the power battery system in the embodiment of the present application.

[0031] Markings in the figure:

[0032] 1, valve body; 10, pressure relief channel; 11, elastic mechanism; 2, protective cover; 21, connecting part; 22, air permeable channel; 23, slot; 3, elastic mechanism; 31, ridge; 32, connecting column; 321, clamping edge; 33, extension; 331, limiting structure; 4, waterproof air permeable film; 5, rubber ring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, but not all the embodiments of the present application.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts, fall within the scope of protection of the present application.

[0035] Embodiment 1

[0036] Please refer to Figure 1 , the structure of a sealing assembly of an explosion-proof valve provided by the embodiment of the present application is shown in the figure.

[0037] The sealing assembly is applied in the explosion-proof valve, and the relative sealing and fixing between the protective cover and the valve body of the explosion-proof valve can be realized through the sealing assembly.

[0038] As shown in the drawings, the sealing assembly comprises a valve body 1, a protective cover 2 and an elastic mechanism 33. Figure 1

[0039] The middle part of the valve body 1 is provided with a pressure relief channel 10, which is used for discharging the gas or sputtering generated by thermal runaway when the explosion-proof valve is in a pressure relief state. The valve body 1 can be made of hard materials such as metal or plastic to form the main part of the explosion-proof valve. The protective cover 2 is arranged on the pressure relief channel 10 of the valve body 1 and comprises a connecting part 21 extending to the inside of the pressure relief channel 10. Specifically, the protective cover 2 can completely or partially seal the pressure relief channel 10, so that the pressure relief channel 10 of the valve body 1 is relatively isolated from the outside of the valve body 1, so as to avoid the rain, dust, sludge or other external objects from entering the inside of the valve body 1, thereby affecting the service life and even the safety of the power battery.

[0040] The elastic mechanism 3 is arranged on the connecting part 21, and the elastic mechanism 3 comprises a ridge 31 and a connecting column 32.

[0041] The protective cover 2 is sealed and abuts between the ridge 31 and the pressure relief channel 10. The ridge 31 is a protruding structure made of elastic material, which can be a sealing ring arranged around the connecting part 21 or other protruding structures similar to the sealing ring. In addition, as long as the ridge 31 can be used to abut between the valve body 1 and the connecting part 21 and play a sealing role, the specific form and arrangement manner are not limited. The elastic mechanism 3 can be made of resin, rubber, silicone or other materials with elastic properties. It can be understood that the specific rebound performance of the elastic material can be determined according to actual needs, and the specific material and shape are not limited in the application.

[0042] In an embodiment, the connecting column 32 and the ridge 31 are connected with the connecting part 21 respectively, that is, the connecting column 32 and the ridge 31 are not integrated. Or the connecting column 32 and the ridge 31 are integrally formed, that is, the connecting column 32 and the ridge 31 are the same whole. It can be understood that the connection mode between the connecting column 32 and the ridge 31 can be designed according to the production and installation needs of the elastic mechanism 3, so as to facilitate the production and installation of the connecting column 32 and the ridge 31.

[0043] The inner side of the pressure relief channel 10 is also provided with a clamping groove 11 matched with the connecting column 32, and the connecting column 32 is arranged in the clamping groove 11. The clamping groove 11 can be a structure extending from the valve body 1 or a structure installed on the valve body 1, and the specific implementation mode of the clamping groove 11 is not limited. When the connecting column 32 is installed into the clamping groove 11, the clamping groove 11 can relatively position the connecting column 32, so that the connecting column 32 is not easily separated from the clamping groove 11. ​

[0044] The connecting column 32 is provided with a clamping edge 321 for limiting the protective cover 2, and the clamping edge 321 is arranged on the side of the clamping groove 11 away from the protective cover 2. The clamping edge 321 can be located at the end of the connecting column 32, or can be located at any position between the two ends of the connecting column 32. When the connecting column 32 is installed into the clamping groove 11, the clamping edge 321 can abut against one side of the clamping groove 11, or can have a certain spacing with the clamping groove 11.

[0045] Please refer to Figures 2-3 , Figure 2 The cross-sectional structure of the sealing assembly of the explosion-proof valve provided by the embodiment of the present application is shown in FIG. 4. Figure 3 The other cross-sectional structure of the sealing assembly of the explosion-proof valve provided by the embodiment of the present application is shown in FIG. 5.

[0046] As Figure 2 shown, in an embodiment, when the clamping edge 321 abuts against the clamping groove 11, the clamping edge 321 and one side of the clamping groove 11 can generate a mutual force, so that the protective cover 2 is limited by the clamping edge 321, thereby maintaining the relative stability between the protective cover 2 and the valve body 1 when the explosion-proof valve is subjected to vibration and impact, and the protective cover 2 will not easily fall off the valve body 1.

[0047] In another embodiment, the clamping edge 321 and the clamping groove 11 can also not generate any force when abutting against each other, and only generate a mutual force when the protective cover 2 is subjected to vibration and impact, which does not affect the limiting effect of the protective cover 2.

[0048] In still another embodiment, the clamping edge 321 and the clamping groove 11 have a certain spacing, and the limiting effect between the protective cover 2 and the valve body 1 can be achieved only by the convex ridge 31, so that the clamping edge 321 will abut against one side of the clamping groove 11 and generate a certain mutual force only when subjected to vibration and impact.

[0049] It can be understood that the positional relationship between the clamping edge 321 and the clamping groove 11 can be determined according to actual conditions, and the present application does not limit this.

[0050] When the power battery system is in a normal state, the difference between the internal pressure and the external pressure of the explosion-proof valve is within the threshold value, at this time, the clamping edge 321 on the connecting column 32 and the clamping groove 11 are in an abutting or non-abutting state, and the protective cover 2 and the valve body 1 are in a connected and sealed state.

[0051] When the power battery system encounters vibration and impact, but the inner side gas pressure of the explosion-proof valve is slightly greater than the outer side gas pressure, and the difference between the inner side gas pressure and the outer side gas pressure is within the threshold, at this time, the clamping edge 321 on the connecting column 32 is in abutment with the clamping groove 11, and the deformation of the clamping edge 321 is not enough to be pulled by the protective cover 2 to separate from the clamping groove 11. The clamping edge 321 on the connecting column 32 is limited by the clamping groove 11, and pulls the protective cover 2 to prevent it from separating from the valve body 1. At this time, the protective cover 2 and the valve body 1 are still in a connected and sealed state.

[0052] When the power battery system is in thermal runaway, the inner side gas pressure of the explosion-proof valve is much greater than the outer side gas pressure, and the difference between the inner side gas pressure and the outer side gas pressure is greater than the threshold. At this time, the clamping edge 321 on the connecting column 32 is pulled by the protective cover 2, so that the clamping edge 321 is deformed and compressed into the clamping groove 11. Finally, the clamping edge 321 is out of the limitation of the clamping groove 11 and separates from the clamping groove 11. The protective cover 2 smoothly separates from the valve body 1 and opens the pressure relief channel 10. Alternatively, the connecting column 32 is pulled by the protective cover 2 with great force, and finally the connecting column 32 and the connecting part 21 are disconnected or separated, so that the protective cover 2 smoothly separates from the valve body 1 and opens the pressure relief channel 10.

[0053] In an embodiment, the elastic mechanism 3 is sleeved on the edge of the connecting part 21. Specifically, the elastic mechanism 3 can be fixed relative to the connecting part 21 by being installed on the edge of the connecting part 21, and the protective cover 2 can be connected between the elastic mechanism 3 and the valve body 1. Further, the connecting part 21 and the elastic mechanism 3 can be fixed by clamping, encapsulation or interference fit, and the connection mode of the connecting part 21 and the elastic mechanism 3 can be determined according to actual conditions.

[0054] As can be seen from the above, by providing the elastic mechanism 3 on the connecting part 21 of the protective cover 2, the convex ridge 31 on the elastic mechanism 3 is used to realize the sealing between the protective cover 2 and the pressure relief channel 10. Further, the sealing assembly realizes the limitation of the protective cover 2 by the clamping edge 321 of the connecting column 32 and the clamping groove 11 on the valve body 1, so as to avoid the protective cover 2 from separating from the valve body 1 under the action of vibration or impact. The sealing assembly has simple structure, low manufacturing cost, and can ensure the stability of the sealing assembly and the explosion-proof valve.

[0055] In another embodiment, the elastic mechanism 3 is integrally formed with the connecting part 21. The elastic mechanism 3 can have the same structure as the connecting part 21 and be integrally formed in the production process, so that the elastic mechanism 3 does not need to be installed separately, reducing the manufacturing cost.

[0056] In order to make the connection between the protective cover 2 and the valve body 1 more stable, the elastic mechanism 3 can include at least two connecting columns 32, which are evenly distributed on the elastic mechanism 3. Specifically, the connecting columns 32 can be arranged on opposite sides of the elastic mechanism 3, thereby forming an axisymmetric structure, so that the connecting columns 32 and the clamping groove 11 can be uniformly stressed, avoiding the case that one side is stressed too much and the explosion-proof valve is easily damaged. Of course, the connecting columns 32 can also be arranged in three, four or even more numbers, thereby further improving the use stability of the sealing assembly and the explosion-proof valve.

[0057] In an embodiment, at least one connecting column 32 extends an extension 33 at an end away from the clamping groove 11, and a limiting structure 331 is arranged at the end of the extension 33. The extension 33 can be connected with the valve body 1 through the limiting structure 331, and the elastic mechanism 3 is further configured to limit the protective cover 2 by the limiting structure 331 when the pulling force of the protective cover 2 on the connecting column 32 is greater than a threshold value at which the connecting column 32 is pulled out of the clamping groove 11, so that the protective cover 2 will not completely separate from the valve body 1, avoiding the protective cover 2 flying out at high speed and causing damage to personnel or other equipment.

[0058] In an embodiment, the width of the limiting structure 331 can be greater than the width of the clamping edge 321, and the above design can ensure that when the connecting column 32 is subjected to a pulling force greater than the threshold value at which it is pulled out of the clamping groove 11, the limiting structure 331 is still constrained by the clamping groove 11 and will not be further separated. It can be understood that the width of the clamping edge 321 and the width of the limiting structure 331 can be determined according to the material properties and the design of the threshold value. For example, if the elastic modulus of the material is larger, the width of the convex edge 321 can be correspondingly narrower under the same threshold value, which is not limited in the present application.

[0059] In addition, the clamping groove 11 can be designed as an arcuate groove, thereby improving the limiting effect of the connecting column 32 through the shape of the groove, so that the connecting column 32 will not easily separate from the clamping groove 11 when subjected to the pulling force of the protective cover 2 caused by general vibration or impact, thereby improving the use stability of the sealing assembly and the explosion-proof valve.

[0060] Embodiment 2

[0061] Please refer to Figures 4-5 , which shows another structure of the sealing assembly of the explosion-proof valve provided by the embodiments of the present application.

[0062] As Figures 4-5 shown, in addition to the valve body 1, the protective cover 2 and the elastic mechanism 3 as shown in Figures 1-3 , the sealing assembly can also include a waterproof and breathable membrane 4.

[0063] The waterproof and breathable membrane 4 is disposed on the protective cover 2 and covers the pressure relief channel 10. The waterproof and breathable membrane 4 can be made of e-PTFE (expanded polytetrafluoroethylene), thereby enabling the explosion-proof valve to have a certain degree of waterproof and breathable function. Of course, the waterproof and breathable membrane 4 can also be made of other materials, and this application does not limit it.

[0064] Specifically, the waterproof and breathable membrane 4 can be installed and fixed to the protective cover 2 or the valve body 1 by means of heat fusion, setting a pressure ring, etc., or it can be pressed onto the valve body 1 by the connecting part 21 or the elastic mechanism 3. The specific installation method of the waterproof and breathable membrane 4 is not limited, as long as it can cover the pressure relief channel 10.

[0065] By setting up a waterproof and breathable membrane 4, the sealing component can exchange gases with the outside through the waterproof and breathable membrane 4, thereby ensuring that the pressure difference between the inside and outside of the power battery system is maintained at a reasonable level while achieving the pressure relief function.

[0066] Specifically, in order to achieve the air permeability effect, a gap for air permeability is provided between the protective cover 2 and the valve body 1, and an air permeability channel 22 is provided on the connecting part 21. The pressure relief channel 10 is connected to the outside through the waterproof air permeable valve, the air permeability channel 22 and the gap.

[0067] The venting channel 22 can be a vent hole extending through the connecting portion 21, or a venting groove located at the edge of the connecting portion 21. Multiple vent holes or grooves can be provided to improve venting efficiency. In one implementation, multiple slots 23 can be provided at the edge of the protective cover 2, which can increase the air permeability between the protective cover 2 and the valve body 1. These slots 23 and the venting channel 22 can be positioned opposite each other to further improve the air permeability between the pressure relief channel 10 and the outside. Of course, the size of the gap between the protective cover 2 and the valve body 1, the size of the vent holes, and their design can all be determined according to actual needs, and this application does not limit them.

[0068] In this embodiment, when the power battery system is in normal condition, the pressure difference between the inner and outer sides of the explosion-proof valve is within a threshold value. The inner and outer sides of the explosion-proof valve exchange gases through the waterproof and breathable membrane 4, thereby achieving the ventilation function. At this time, the locking edge 321 on the connecting post 32 and the locking groove 11 are in a state of contact or non-contact, and the protective cover 2 and the valve body 1 are in a connected and sealed state.

[0069] When the power battery system encounters vibration or impact, but the internal air pressure of the explosion-proof valve is slightly greater than the external air pressure, and the difference between the internal and external air pressures is within the threshold, the retaining edge 321 on the connecting post 32 is in contact with the retaining groove 11. The deformation of the retaining edge 321 is insufficient to be pulled away from the retaining groove 11 by the protective cover 2. The retaining edge 321 on the connecting post 32 is limited by the retaining groove 11, pulling the protective cover 2 to prevent it from detaching from the valve body 1. At this time, the protective cover 2 and the valve body 1 remain connected and sealed. During this process, the explosion-proof valve can balance the pressure difference between the internal and external air pressures through the waterproof and breathable membrane 4, preventing the internal air pressure from continuing to increase and causing an excessive pressure difference between the internal and external sides.

[0070] When the power battery system is in thermal runaway, the internal air pressure of the explosion-proof valve is much greater than the external air pressure, and the difference between the internal and external air pressures exceeds a threshold. At this time, the pressure difference cannot be balanced solely by the waterproof and breathable membrane 4. The retaining edge 321 of the connecting post 32 is pulled by the protective cover 2, causing the retaining edge 321 to deform and be compressed into the retaining groove 11. Finally, the retaining edge 321 breaks free from the retaining groove 11 and disengages from it, allowing the protective cover 2 to successfully detach from the valve body 1 and open the pressure relief channel 10. Alternatively, if the pulling force of the protective cover 2 on the connecting post 32 is large, the connecting post 32 will eventually disconnect or detach from the connecting part 21, allowing the protective cover 2 to successfully detach from the valve body 1 and open the pressure relief channel 10.

[0071] Traditional explosion-proof valves, if equipped with a waterproof and breathable membrane 4, will suffer from reduced connection strength due to the incomplete seal between the protective cover 2 and the valve body 1, making the protective cover 2 more susceptible to vibration and impact, causing it to detach. In this embodiment, the sealing component, by incorporating the waterproof and breathable membrane 4, enables the explosion-proof valve to simultaneously provide both ventilation and pressure relief for explosion protection. Furthermore, utilizing the limiting effect between the connecting post 32 and the locking groove 11, the sealing component and explosion-proof valve in this embodiment maintain higher reliability compared to traditional explosion-proof valves equipped with the waterproof and breathable membrane 4.

[0072] In addition, this application also protects an explosion-proof valve, which includes, as follows: Figures 1-5 The sealing assembly of the explosion-proof valve in any embodiment, and in addition to the sealing assembly described above, the explosion-proof valve may also include a mounting lug for installation or a thread located at the lower part, and may also include a rubber ring 5 for sealing, etc., as can be seen in this application. Figures 1-5 Regarding the structure of the explosion-proof valve, this application does not limit the specific structural form of the explosion-proof valve.

[0073] Example 3

[0074] Please see Figure 6 The figure shows the structure of the power battery system provided in an embodiment of this application.

[0075] like Figure 6 As shown, the power battery system 100 includes a housing 110 containing the power battery and an explosion-proof valve 120. The explosion-proof valve 120 is mounted on the housing 110 and includes a sealing assembly as provided in any of the above embodiments. The sealing assembly may include a valve body, a protective cover, and an elastic mechanism. Specific structural implementations can be found in... Figures 1-3 The structural implementation of the sealing assembly described in any embodiment.

[0076] The power battery can be a lithium battery, sodium-ion battery, fuel cell, etc., and the type of power battery is not limited. The explosion-proof valve 120 can adopt various different structural methods such as metal and non-metal, as long as it can have a pressure relief function. Of course, in addition to the explosion-proof valve 120, the power battery system 100 may also include other structural components, such as protection circuits for battery overvoltage / overcurrent protection, starting circuits, cables, etc. This application does not limit the specific sub-modules included in the power battery system 100.

[0077] It can be seen that by applying the explosion-proof valve 120 containing the sealing component, the power battery system 100 can ensure the stability of the explosion-proof valve, thereby ensuring that the pressure inside the housing 110 remains stable for a long time, and improving the service life and stability of the power battery system 100.

[0078] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication 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 application according to the specific circumstances.

[0079] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application 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 application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0080] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0081] In this application, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" a first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] Although the description of this application has been made in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A sealing assembly for an explosion-proof valve, characterized in that, The sealing assembly includes: The valve body has a pressure relief passage in the middle; and A protective cover is provided on the pressure relief channel of the valve body, including a connecting part that extends to the inside of the pressure relief channel; The sealing assembly further includes an elastic mechanism disposed on the connecting portion. The elastic mechanism includes a ridge and a connecting post. The protective cover is sealed against the pressure relief channel through the ridge. The inner side of the pressure relief channel is also provided with a snap-fit ​​groove that mates with the connecting post, and the connecting post is disposed in the snap-fit ​​groove. The connecting post is provided with a retaining edge for limiting the position of the protective cover, and the retaining edge is located on the side of the retaining groove away from the protective cover.

2. The sealing assembly of the explosion-proof valve as described in claim 1, characterized in that: The elastic mechanism is sleeved at the edge of the connecting portion; or The elastic mechanism is integrally formed with the connecting part.

3. The sealing assembly of the explosion-proof valve as described in claim 1, characterized in that, The elastic mechanism includes at least two connecting posts, which are evenly distributed on the elastic mechanism.

4. The sealing assembly of the explosion-proof valve as described in claim 1 or 3, characterized in that, At least one of the connecting posts extends into an extension portion at one end away from the snap-fit ​​groove, and a limiting structure is provided at the end of the extension portion.

5. The sealing assembly of the explosion-proof valve as described in claim 4, characterized in that, The width of the limiting structure is greater than the width of the card edge.

6. The sealing assembly of the explosion-proof valve as described in claim 1, characterized in that, The snap-fit ​​groove is an arc-shaped groove.

7. The sealing assembly of the explosion-proof valve as described in claim 1, characterized in that: The connecting post and the ridge are respectively connected to the connecting part; or The connecting column and the ridge are integrally formed.

8. The sealing assembly of the explosion-proof valve as described in claim 1, characterized in that: The sealing assembly also includes a waterproof and breathable membrane, which is disposed on the protective cover and covers the pressure relief channel; A gap for ventilation is provided between the protective cover and the valve body, and a ventilation channel is provided on the connecting part. The pressure relief channel communicates with the outside through the waterproof and breathable membrane, the ventilation channel and the gap.

9. An explosion-proof valve, characterized in that, The explosion-proof valve includes the sealing assembly as described in any one of claims 1-8.

10. A power battery system, characterized in that, include: A housing containing the power battery; as well as An explosion-proof valve is installed on the enclosure, and the explosion-proof valve is the explosion-proof valve as described in claim 9.

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