Explosion-proof valve, battery cover plate, battery monomer, battery pack and electric device

Abstract

The utility model discloses an explosion-proof valve, battery cover plate, battery monomer, battery pack and electric device, wherein the explosion-proof valve includes valve body and valve core subassembly, the valve body is equipped with the mating hole and the vent hole that run through the valve body, the vent hole is suitable for being communicated with the accommodation chamber of battery monomer, the valve core subassembly includes valve core and the valve rod that is connected to the valve core, the valve rod is connected to the valve core. The valve element and the valve rod form an integrated piece, the valve element is arranged on one side of the valve body and right faces the exhaust hole, the valve rod movably penetrates through the matching hole to drive the valve element to open or block the exhaust hole, and the valve element assembly is provided with an air inlet and outlet channel communicated with the containing cavity. According to the explosion-proof valve disclosed by the embodiment of the utility model, the use safety of the battery monomer is improved, the self assembly difficulty of the explosion-proof valve can be reduced, and the assembly efficiency of the explosion-proof valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a kind of explosion-proof valve, battery cover plate, battery monomer, battery pack and electric device. BACKGROUND

[0002] The explosion-proof valve is applied to the battery monomer. When the pressure in the battery monomer rises sharply due to short circuit, overcharge, overdischarge or high temperature, the explosion-proof valve will automatically open to quickly release the internal pressure of the battery monomer, thereby preventing the battery monomer from exploding to some extent, improving the safety of the battery monomer, and prolonging the service life of the battery monomer.

[0003] However, the existing explosion-proof valve is complex to assemble, which affects the assembly efficiency of the explosion-proof valve. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the first purpose of the utility model is to provide an explosion-proof valve. The explosion-proof valve can improve the safety of the battery monomer while reducing the assembly difficulty of itself and improving the assembly efficiency, thereby solving the technical problems of the existing explosion-proof valve, such as complex assembly and low assembly efficiency.

[0005] The second purpose of the utility model is to provide a battery cover plate with the above-mentioned explosion-proof valve.

[0006] The third purpose of the utility model is to provide a battery monomer with the above-mentioned battery cover plate.

[0007] The fourth purpose of the utility model is to provide a battery pack with the above-mentioned battery monomer.

[0008] The fifth purpose of the utility model is to provide an electric device with the above-mentioned battery pack.

[0009] According to the explosion-proof valve of the utility model embodiment, the valve body is provided with a matching hole and an exhaust hole penetrating through it, and the exhaust hole is adapted to communicate with the accommodating cavity of the battery monomer. The valve core assembly includes a valve core and a valve rod connected to the valve core. The valve core and the valve rod are formed as an integral piece. The valve core is arranged on one side of the valve body and opposite to the exhaust hole. The valve rod is movably arranged in the matching hole to drive the valve core to open or block the exhaust hole. The valve core assembly is provided with an air inlet and exhaust passage communicating with the accommodating cavity.

[0010] According to the explosion-proof valve, the air inlet and outlet channel is arranged in the valve core assembly, the air inlet and outlet channel is used to balance the internal air pressure of the battery monomer and the external air pressure, and the use safety of the battery monomer is improved.

[0011] In some embodiments, the valve core and the valve rod are nylon, polyphenylene sulfide or polyurethane.

[0012] In some embodiments, the air inlet and outlet channel comprises a first channel and a second channel connected with each other, the first channel is arranged on the valve rod and communicates with the accommodating cavity, and the second channel is arranged on the valve core and is adapted to communicate with the external space of the explosion-proof valve.

[0013] In some embodiments, the second channel has at least one bending portion.

[0014] In some embodiments, the second channel comprises a plurality of first portions extending along the circumference of the valve core and a second portion extending along the radial direction of the valve core, and the first portion and the second portion adjacent to the first portion define the bending portion.

[0015] In some embodiments, a waterproof and breathable member is arranged between the first channel and the second channel.

[0016] In some embodiments, a first mounting hole penetrating the valve core is arranged at the radial middle portion of the valve core, the valve rod is arranged opposite to the first mounting hole, the first mounting hole communicates with the first channel and the second channel respectively, and the waterproof and breathable member is arranged in the first mounting hole.

[0017] In some embodiments, the explosion-proof valve further comprises a pressing member arranged in the first mounting hole and pressing against the side of the waterproof and breathable member away from the first channel, the pressing member is provided with a first air permeation area, and the first air permeation area communicates the waterproof and breathable member and the second channel.

[0018] In some embodiments, the explosion-proof valve further comprises a cover plate, the second channel is a groove formed on the valve core, the cover plate is arranged on the side of the valve core away from the valve rod and seals the groove, and opposite ends of the groove are respectively communicated with the first channel and the external space.

[0019] In some embodiments, the cover plate is provided with a protruding part protruding towards the waterproof air-permeable member, the protruding part is used to press the waterproof air-permeable member, a second air-permeable area is arranged on the protruding part, and the second air-permeable area is communicated with the waterproof air-permeable member and the second channel.

[0020] In some embodiments, the second channel comprises a plurality of second channels, the plurality of second channels are arranged at intervals along the circumference of the valve core, and the plurality of second channels are all communicated with the first channel.

[0021] In some embodiments, the explosion-proof valve further comprises a driving member, the driving member is used to drive the valve rod to move and drive the valve core to block the exhaust hole.

[0022] In some embodiments, the explosion-proof valve further comprises a support member, the support member is arranged on the side of the valve rod away from the valve core, the driving member is an elastic member, the elastic member is sleeved on the outer periphery of the valve rod, and opposite ends of the elastic member are respectively abutted against the valve body and the support member.

[0023] In some embodiments, one of the support member and the valve rod is provided with a buckle, and the other is provided with a clamping groove, and the buckle is matched and clamped in the clamping groove.

[0024] In some embodiments, the explosion-proof valve further comprises a protective cover, the protective cover is sleeved on one end of the valve rod and located outside the elastic member.

[0025] In some embodiments, the protective cover is fixedly connected with the valve body.

[0026] In some embodiments, in the radial direction of the valve rod, the protective cover and the elastic member are arranged at intervals to form a third channel between the protective cover and the valve rod, and the third channel is respectively communicated with the air inlet and exhaust channel and the exhaust hole.

[0027] In some embodiments, an communication hole is arranged on the outer peripheral wall of the protective cover, and the communication hole is communicated with the third channel and the accommodating cavity.

[0028] In some embodiments, a first sealing member is arranged between the valve core and the valve body.

[0029] According to the battery cover plate of the embodiment of the utility model, through adopting the preceding anti-explosion valve, the assembly difficulty of the battery cover plate can be reduced, and the assembly efficiency is improved.

[0030] According to the battery cover plate of the embodiment of the utility model, through adopting the preceding anti-explosion valve, the assembly difficulty of the battery cover plate can be reduced, and the assembly efficiency is improved.

[0031] In some embodiments, a second sealing member is arranged between the valve body and the cover plate body.

[0032] According to the battery monomer of the embodiment of the utility model, the battery cover plate is the preceding battery cover plate, the battery cover plate is arranged at the opening, and the exhaust hole and the air inlet and exhaust passage of the anti-explosion valve are all communicated with the accommodating cavity.

[0033] According to the battery monomer of the embodiment of the utility model, through adopting the preceding battery cover plate, while reducing the assembly difficulty of the battery monomer, the use safety of the battery monomer can be improved, and the service life of the battery monomer is prolonged.

[0034] According to the battery pack of the embodiment of the utility model, the preceding battery monomer is adopted.

[0035] According to the battery pack of the embodiment of the utility model, through adopting the preceding battery monomer, the assembly difficulty of the battery pack can be reduced, and the use safety of the battery pack is improved, and the service life of the battery pack is prolonged.

[0036] According to the electric device of the embodiment of the utility model, the preceding battery pack is adopted, so that the working performance of the electric device is ensured, and the use safety of the electric device is improved.

[0037] According to the electric device of the embodiment of the utility model, the preceding battery pack is adopted, so that the working performance of the electric device is ensured, and the use safety of the electric device is improved.

[0038] The additional aspects and advantages of the utility model will become apparent from the following description, or be appreciated through practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0039] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description, with reference to the following drawings, in which:

[0040] Figure 1 It is the explosion diagram of the anti-explosion valve of some embodiments of the first aspect of the utility model.

[0041] Figure 2A schematic view of the valve body of some embodiments of the present application.

[0042] Figure 3 A top view of the valve body of some embodiments of the present application.

[0043] Figure 4 A half sectional view of the valve body of some embodiments of the present application.

[0044] Figure 5 A schematic view of the valve core assembly of some embodiments of the present application.

[0045] Figure 6 A schematic view of the valve core assembly of some embodiments of the present application from another angle.

[0046] Figure 7 A front view of the valve core assembly of some embodiments of the present application.

[0047] Figure 8 A top view of the valve core assembly of some embodiments of the present application.

[0048] Figure 9 A sectional view of the valve core assembly of some embodiments of the present application.

[0049] Figure 10 A sectional view of the explosion-proof valve of some embodiments of the first aspect of the present application, wherein the valve core blocks the exhaust hole.

[0050] Figure 11 A sectional view of the explosion-proof valve of some embodiments of the first aspect of the present application, wherein the valve core opens the exhaust hole.

[0051] Figure 12 A schematic view of the waterproof air-permeable member of some embodiments of the present application.

[0052] Figure 13 A schematic view of the cover plate of some embodiments of the first aspect of the present application.

[0053] Figure 14 A sectional view of the cover plate of some embodiments of the first aspect of the present application.

[0054] Figure 15 A schematic view of the driving member of some embodiments of the present application.

[0055] Figure 16 A schematic view of the support member of some embodiments of the first aspect of the present application.

[0056] Figure 17 A bottom view of the support member of some embodiments of the first aspect of the present application.

[0057] Figure 18Schematic diagram of explosion-proof valves according to some embodiments of the first aspect of the present utility model.

[0058] Figure 19 This is a front view of the explosion-proof valve of some embodiments of the first aspect of the utility model.

[0059] Figure 20 This is a side view of an explosion-proof valve according to some embodiments of the first aspect of the present utility model.

[0060] Figure 21 Schematic diagram of protective covers according to some embodiments of the present invention.

[0061] Figure 22 This is a front view of the protective cover of some embodiments of the present invention.

[0062] Figure 23 This is a front view of the protective cover of some embodiments of the present invention from another angle.

[0063] Figure 24 sectional views of protective covers according to some embodiments of the present invention.

[0064] Figure 25 Schematic diagram of the first sealing member of some embodiments of the first aspect of the present utility model.

[0065] Figure 26 This is a top view of the first sealing component of some embodiments of the first aspect of the present utility model.

[0066] Figure 27 Schematic diagram of the second sealing member in some embodiments of the present invention.

[0067] Figure 28 This is a front view of the second sealing member in some embodiments of the present invention.

[0068] Figure 29 This is an exploded view of the explosion-proof valve of some embodiments of the second aspect of the utility model.

[0069] Figure 30 This is a cross-sectional view of an explosion-proof valve according to some embodiments of the second aspect of the present utility model, wherein the valve core blocks the exhaust hole.

[0070] Figure 31 This is a cross-sectional view of an explosion-proof valve according to some embodiments of the second aspect of the present utility model, wherein the valve core opens the exhaust hole.

[0071] Figure 32 Schematic diagram of the pressing member of some embodiments of the second aspect of the utility model.

[0072] Figure 33 Schematic diagram of the cover plate of some embodiments of the second aspect of the utility model.

[0073] Figure 34 A cross-sectional view of the cover plate for some embodiments of the second aspect of the present application.

[0074] Figure 35 A schematic view of the first seal for some embodiments of the second aspect of the present application.

[0075] Figure 36 A cross-sectional view of the first seal for some embodiments of the second aspect of the present application.

[0076] Reference signs:

[0077] 1000, explosion-proof valve; 100, valve body; 110, matching hole; 120, exhaust hole; 130, third mounting hole; 140, first mounting groove; 150, second mounting groove; 200, valve core assembly; 210, valve core; 211, first mounting hole; 212, glue dispensing groove; 213, first matching protrusion; 220, valve rod; 221, buckle; 230, air inlet and exhaust passage; 231, first passage; 232, second passage; 2322, first part; 2323, second part; 300, waterproof air permeable piece; 400, pressing piece; 410, first air permeable area; 500, cover plate; 510, protruding part; 511, second air permeable area; 520, third air permeable area; 600, driving piece; 700, supporting piece; 710, clamping groove; 800, protective cover; 810, communication hole; 910, third passage; 920, first seal; 921, second matching protrusion; 930, second seal; 931, third matching protrusion. DETAILED DESCRIPTION

[0078] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0079] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0080] The explosion-proof valve 1000 according to the embodiments of the present application is described below with reference to the accompanying drawings of the present application.

[0081] In combination Figure 1 and Figure 29 , the explosion-proof valve 1000 according to the embodiments of the present application comprises a valve body 100 and a valve core assembly 200.

[0082] In combination Figure 1 , Figure 2 , Figure 3 and Figure 4 , the valve body 100 is provided with a matching hole 110 and an exhaust hole 120 penetrating the valve body 100, and the exhaust hole 120 is adapted to communicate with the accommodating cavity of the battery monomer. Here, the valve body 100 is provided with the matching hole 110 and the exhaust hole 120 at the same time, and the matching hole 110 and the exhaust hole 120 penetrate the valve body 100, so as to ensure the working performance of the matching hole 110 and the exhaust hole 120 to a certain extent, so as to ensure the working performance of the valve body 100. Since the exhaust hole 120 is adapted to communicate with the accommodating cavity of the battery monomer, when the battery monomer loses control and high-temperature and high-pressure gas is generated in the accommodating cavity within a short time, the gas can be quickly discharged from the accommodating cavity through the exhaust hole 120, achieving the explosion-proof function and improving the use safety of the battery monomer.

[0083] In some embodiments, in combination Figure 2 , Figure 3 and Figure 4 , the matching hole 110 and the exhaust hole 120 are arranged on the valve body 100 and extend along the thickness direction of the valve body 100, so that the matching hole 110 and the exhaust hole 120 can penetrate the valve body 100. In this way, the matching hole 110 and the exhaust hole 120 can respectively communicate with the opposite sides of the valve body 100 in the thickness direction, so as to ensure the working performance of the matching hole 110 and the exhaust hole 120 to a certain extent.

[0084] In combination Figures 5-11 , the valve core assembly 200 comprises a valve core 210 and a valve rod 220, the valve rod 220 is connected to the valve core 210, the valve core 210 and the valve rod 220 are formed as an integral piece, the valve core 210 is arranged on one side of the valve body 100 and faces the exhaust hole 120, the valve rod 220 is movably arranged in the matching hole 110 to drive the valve core 210 to open or block the exhaust hole 120, and the valve core assembly 200 is provided with an air inlet and exhaust passage 230 communicating with the accommodating cavity.

[0085] Here, the matching hole 110 on the valve body 100 is used to avoid the valve rod 220, the valve core 210 is arranged on one side of the valve body 100 and faces the exhaust hole 120, and the valve rod 220 is movably arranged in the matching hole 110, so that the valve rod 220 can drive the valve core 210 to open or block the exhaust hole 120, wherein Figure 10 and Figure 30A diagram showing that the valve core 210 blocks the exhaust hole 120, Figure 11 and Figure 31 A diagram showing that the valve core 210 opens the exhaust hole 120. Since the exhaust hole 120 is adapted to communicate with the accommodating cavity of the battery monomer, when the valve rod 220 drives the valve core 210 to open the exhaust hole 120, the communication between the inside and outside of the accommodating cavity can be achieved by using the exhaust hole 120. Thus, when the battery monomer is out of control and high-temperature and high-pressure gas is generated inside in a short time, the gas can be quickly discharged from the accommodating cavity through the exhaust hole 120, achieving the explosion-proof function and improving the use safety of the battery monomer. When the valve rod 220 drives the valve core 210 to block the exhaust hole 120, the external water, dust and other foreign matters can be prevented from entering the battery monomer to a certain extent, so as to ensure the normal work and use safety of the battery monomer.

[0086] That is, the present application is configured by the movable valve rod 220, the valve core 210 and the exhaust hole 120 to achieve the explosion-proof purpose when the battery monomer is out of control, and also prevent the external water, dust and other foreign matters from entering the battery monomer when the battery monomer is working normally.

[0087] In addition, the movable valve rod 220, the valve core 210 and the exhaust hole 120 are configured to enable the exhaust hole 120 to be re-blocked after being opened, so that the explosion-proof valve 1000 can be reused, the service life of the explosion-proof valve 1000 is prolonged, and the use cost of the explosion-proof valve 1000 is reduced.

[0088] It is worth noting that the present application is configured by the valve core 210 and the valve rod 220 to form an integral piece, so that the valve core 210 and the valve rod 220 can be integrally machined and formed. On the one hand, the connection between the valve core 210 and the valve rod 220 can be omitted, the assembly difficulty of the valve core assembly 200 is reduced, the assembly difficulty of the explosion-proof valve 1000 is reduced, the assembly efficiency of the explosion-proof valve 1000 is improved, and on the other hand, the connection strength of the valve core 210 and the valve rod 220 is improved, the relative position of the valve core 210 and the valve rod 220 is stable, the structural stability of the valve core assembly 200 is improved, and the working performance of the valve core assembly 200 is ensured to a certain extent.

[0089] It should be noted that when the internal gas pressure of the accommodating cavity of the battery monomer is greater than the external gas pressure, the shell of the battery monomer may not be able to withstand the internal pressure and break, thereby causing the battery monomer to explode and affecting the use safety of the battery monomer. When the internal gas pressure of the accommodating cavity of the battery monomer is less than the external gas pressure, a negative pressure will be formed inside the accommodating cavity, which may cause the positive active material of the pole core to be incompletely discharged, affect the available capacity of the battery monomer, and also accelerate the degradation and aging process of the internal structure of the battery monomer to a certain extent, thereby shortening the service life of the battery monomer.

[0090] Based on this, the application sets the inlet and exhaust passage 230 which communicates the accommodating cavity of the battery monomer in the valve core assembly 200, when the internal gas pressure of the accommodating cavity of the battery monomer is greater than the external gas pressure, the gas in the accommodating cavity can be exhausted to the outside through the inlet and exhaust passage 230, when the internal gas pressure of the accommodating cavity of the battery monomer is less than the external gas pressure, the external gas can be supplemented to the inside of the accommodating cavity through the inlet and exhaust passage 230, so as to balance the internal and external pressure of the battery monomer, improve the use safety of the battery monomer, and be beneficial to prolong the service life of the battery monomer.

[0091] In summary, the explosion-proof valve 1000 of the application contains three working conditions: first, when the internal gas pressure of the accommodating cavity of the battery monomer is greater than the external gas pressure, the internal gas of the battery monomer is exhausted to the outside through the inlet and exhaust passage 230 of the explosion-proof valve 1000; second, when the internal gas pressure of the accommodating cavity of the battery monomer is less than the external gas pressure, the external gas is supplemented to the inside of the battery monomer through the inlet and exhaust passage 230 of the explosion-proof valve 1000; third, when the battery monomer is out of control, high-temperature and high-pressure gas will be generated in the battery monomer in a short time, at this time, the ventilation capacity of the inlet and exhaust passage 230 cannot meet the exhaust demand, the valve stem 220 of the explosion-proof valve 1000 controls the valve core 210 to move to open the exhaust hole 120, so that the gas can be quickly discharged from the battery monomer through the exhaust hole 120, and the explosion-proof function is achieved.

[0092] From the above structure, it can be known that the explosion-proof valve 1000 of the embodiment of the application, by setting the matching hole 110 and the exhaust hole 120 which penetrate the valve body 100, the valve stem 220 can be movably assembled to the valve body 100, because the valve core 210 is arranged on one side of the valve body 100 and faces the exhaust hole 120, so that the exhaust hole 120 can be opened or blocked by the valve core 210, because the exhaust hole 120 is suitable for communicating the accommodating cavity of the battery monomer, so as to realize opening or blocking the accommodating cavity by the valve core 210, when the battery monomer is out of control and high-temperature and high-pressure gas is generated in the battery monomer in a short time, the gas can be quickly discharged from the accommodating cavity, and after the exhaust hole 120 is exhausted, the exhaust hole 120 can be resealed, so as to avoid that when the battery monomer is not pressure-released, the external water, dust and other foreign matters enter the battery monomer, so as to ensure the normal work and use safety of the battery monomer, and the explosion-proof valve 1000 can be repeatedly used, the service life of the explosion-proof valve 1000 is prolonged, and the use cost of the explosion-proof valve 1000 is reduced, so as to prolong the service life of the battery monomer and reduce the use cost of the battery monomer.

[0093] Meanwhile, by setting the air inlet and exhaust passage 230 communicating with the containing cavity in the valve core assembly 200, the communication between the containing cavity and the external space is realized, so that when the internal air pressure of the containing cavity is greater than the external air pressure, the gas in the containing cavity can be exhausted to the outside through the air inlet and exhaust passage 230; when the internal air pressure of the containing cavity is less than the external air pressure, the external gas can be supplemented into the containing cavity through the air inlet and exhaust passage 230, so as to balance the internal and external pressures of the battery monomer, improve the use safety of the battery monomer, and prolong the service life of the battery monomer, and the explosion-proof valve 1000 of the present application contains three working conditions, which ensures the working performance of the explosion-proof valve 1000 to a certain extent.

[0094] Most notably, the valve core 210 and the valve rod 220 are formed as an integral part in the present application, which eliminates the connection between the valve core 210 and the valve rod 220, reduces the assembly difficulty of the valve core assembly 200, thereby reducing the assembly difficulty of the explosion-proof valve 1000, improving the assembly efficiency of the explosion-proof valve 1000, and facilitating the molding difficulty of the air inlet and exhaust passage 230, which ensures the working performance of the air inlet and exhaust passage 230 to a certain extent.

[0095] It can be understood that, compared with the prior art, the explosion-proof valve 1000 of the present application not only can realize rapid exhaust when the battery monomer is out of control, but also can balance the internal and external air pressures of the battery monomer, and solves the technical problem that the valve core 210 and the valve rod 220 need to be connected by threads in the prior art, which leads to complex part installation process.

[0096] In some embodiments, in combination with Figure 2 , Figure 3 and Figure 4 as shown, the valve body 100 is provided with a plurality of exhaust holes 120, and the valve core 210 is arranged opposite to the plurality of exhaust holes 120, so that the valve core 210 can simultaneously open or block the plurality of exhaust holes 120, wherein when the valve core 210 simultaneously opens the plurality of exhaust holes 120, the area of the exhaust hole 120 can be ensured, so that the gas in the containing cavity can be quickly exhausted to achieve the purpose of explosion-proof and improve the use safety of the battery monomer.

[0097] In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0098] In some embodiments, the valve core 210 and the valve rod 220 are nylon parts, polyphenylene sulfide parts or polyurethane parts. Here, it is referred to that the valve core 210 and the valve rod 220 are nylon parts; or, the valve core 210 and the valve rod 220 are polyphenylene sulfide parts; or, the valve core 210 and the valve rod 220 are polyurethane parts, so that the valve core 210 and the valve rod 220 are formed as plastic parts, which can reduce the production cost of the valve core 210 and the valve rod 220 on the one hand, and can also make the valve core 210 and the valve rod 220 be formed as an integral part, thereby reducing the assembly difficulty of the valve core 210 and the valve rod 220, so that the explosion-proof valve 1000 has the advantages of low production cost, small assembly difficulty and high assembly efficiency, thereby solving the technical problems of complex installation process and high processing cost of the valve core 210 and the valve rod 220 in the prior art.

[0099] In some embodiments, the valve core 210 and the valve rod 220 are made of PA66 (polyhexanediamine caprolactam), so that the valve core 210 and the valve rod 220 are formed as nylon parts, which can not only facilitate the valve core 210 and the valve rod 220 to be formed as an integral part, but also can improve the structural strength of the valve core 210 and the valve rod 220, and make the valve core 210 and the valve rod 220 have good wear resistance and fatigue resistance, thereby prolonging the service life of the valve core 210 and the valve rod 220.

[0100] In other embodiments, the valve core 210 and the valve rod 220 are made of PPS (Polyphenylene sulfide, polyphenylene sulfide), so that the valve core 210 and the valve rod 220 are formed as polyphenylene sulfide parts, which can not only facilitate the valve core 210 and the valve rod 220 to be formed as an integral part, but also can improve the structural strength of the valve core 210 and the valve rod 220, so that the valve core 210 and the valve rod 220 can still maintain stable performance when subjected to heavy load and impact.

[0101] In other embodiments, the valve core 210 and the valve rod 220 are made of PU (Polyurethane, polyurethane), so that the valve core 210 and the valve rod 220 are formed as polyurethane parts, which not only facilitate the valve core 210 and the valve rod 220 to be formed as an integral part, but also can make the valve core 210 and the valve rod 220 have excellent wear resistance, elasticity, tear strength and chemical corrosion resistance.

[0102] In some embodiments, the valve core 210 and the valve rod 220 are processed by an injection molding process, so that the valve core 210 and the valve rod 220 are formed as an integral part, thereby reducing the processing difficulty of the valve core 210 and the valve rod 220.

[0103] In summary, the valve core assembly 200 integrates the valve core 210 and the valve rod 220 made of original metal machining into an integral structure by an injection molding process, thereby solving the technical problems of complex installation process and high processing cost of the valve core 210 and the valve rod 220 in the prior art.

[0104] In some embodiments, as shown in Figure 7 , Figure 8 and Figure 9 , the air inlet and outlet passage 230 comprises a first passage 231 and a second passage 232 connected with each other, the first passage 231 is arranged on the valve rod 220 and communicates with the accommodating cavity, and the second passage 232 is arranged on the valve core 210 and is adapted to communicate with the external space of the explosion-proof valve 1000. In this way, the air inlet and outlet passage 230 can also be used to realize the communication between the accommodating cavity and the external space of the explosion-proof valve 1000, so as to introduce the air in the external space into the accommodating cavity through the air inlet and outlet passage 230, and also enable the air in the accommodating cavity to be discharged to the external space of the explosion-proof valve 1000 through the air inlet and outlet passage 230, so that when the internal air pressure of the accommodating cavity is greater than the external air pressure, the gas in the accommodating cavity can be discharged to the outside through the air inlet and outlet passage 230; when the internal air pressure of the accommodating cavity is less than the external air pressure, the external gas can be supplemented into the accommodating cavity through the air inlet and outlet passage 230, so as to balance the internal and external pressures of the battery monomer and improve the use safety of the battery monomer.

[0105] At the same time, by arranging the air inlet and outlet passage 230 to comprise the first passage 231 and the second passage 232 connected with each other, the forming difficulty of the air inlet and outlet passage 230 can also be reduced.

[0106] In addition, by arranging the first passage 231 on the valve rod 220 and the second passage 232 on the valve core 210, the extension directions of the first passage 231 and the second passage 232 can also be made different, so that when the external gas is supplemented into the accommodating cavity through the air inlet and outlet passage 230, the first passage 231 and the second passage 232 with different extension directions can be used to block part of the dust, so as to avoid the entry of dust and other foreign matters into the battery monomer to a certain extent, and ensure the normal work and use safety of the battery monomer.

[0107] In some embodiments, as shown in Figure 5 , Figure 6 and Figure 8 , the second passage 232 has at least one bending portion. When the air flows along the extension direction of the second passage 232, the bending portion can prevent part of the water, dust and other foreign matters from flowing, especially when the external gas is supplemented into the accommodating cavity through the air inlet and outlet passage 230, the entry of water, dust and other foreign matters into the battery monomer can be avoided to a certain extent, so as to ensure the normal work and use safety of the battery monomer.

[0108] In some embodiments, as shown in Figure 5 , Figure 6 and Figure 8As shown, the second channel 232 has a plurality of bending portions arranged at intervals along the extension direction of the second channel 232, and the plurality of bending portions can improve the effect of preventing the flow of water, dust and other foreign matters along the extension direction of the second channel 232, thereby to a certain extent avoiding the water, dust and other foreign matters from entering the battery monomer, so as to ensure the normal work and safe use of the battery monomer.

[0109] In some embodiments, as shown in Figure 8 , the second channel 232 includes a plurality of first portions 2322 extending along the circumference of the valve core 210 and a plurality of second portions 2323 extending along the radial direction of the valve core 210, and the first portion 2322 and the second portion 2323 adjacent thereto define a bending portion. That is, the second channel 232 is arranged to include a plurality of first portions 2322 extending along the circumference of the valve core 210 and a plurality of second portions 2323 extending along the radial direction of the valve core 210, and the first portion 2322 and the second portion 2323 cooperate to define a bending portion, so as to reduce the difficulty of forming the bending portion, thereby facilitating the use of the second channel 232 to prevent water, dust and other foreign matters from entering the battery monomer.

[0110] In some embodiments, the opposite ends of the second portion 2323 are respectively connected to a first portion 2322, and the connection between the second portion 2323 and the first portion 2322 forms a bending portion, so as to reduce the difficulty of forming the bending portion.

[0111] In some embodiments, as shown in , the bending portion can be formed as an arc-shaped channel connected between the second portion 2323 and the first portion 2322.

[0112] Figure 1 In some embodiments, as shown in Figure 10 and Figure 11 , a waterproof and breathable member 300 (the specific structure of the waterproof and breathable member 300 can be referred to in Figure 12 ) is arranged between the first channel 231 and the second channel 232. Since the waterproof and breathable member 300 has both air permeability and waterproofness, by arranging the waterproof and breathable member 300 between the first channel 231 and the second channel 232, the gas can flow between the first channel 231 and the second channel 232, while the water between the first channel 231 and the second channel 232 can be prevented from flowing, so as to further prevent water, dust and other foreign matters from entering the battery monomer through the second channel 232, so as to ensure the normal work and safe use of the battery monomer.

[0113] In some embodiments, the waterproof and breathable member 300 is formed as a waterproof and breathable film, which is a thin film having a microporous structure with a pore size larger than that of air molecules but much smaller than that of water and dust particles, so that air molecules can pass through the waterproof and breathable member 300 smoothly, while water and dust and other foreign matters cannot pass through the waterproof and breathable member 300, so as to prevent water, dust and other foreign matters from entering the inside of the battery monomer by using the waterproof and breathable member 300.

[0114] Optionally, the waterproof and breathable member 300 is made of E-PTFE (expanded Polytetrafluoroethylene), so that the waterproof and breathable member 300 is formed as a waterproof and breathable film, and the air permeability and waterproofness of the waterproof and breathable member 300 are ensured.

[0115] That is, the explosion-proof valve 1000 of the present application not only can balance the pressure inside and outside the battery monomer, but also can prevent water, dust and other foreign matters from entering the inside of the battery monomer.

[0116] It should be noted that, since the waterproof and breathable member 300 is arranged between the first passage 231 and the second passage 232, by arranging the second passage 232 to have at least one bending portion, it can also to some extent avoid the external dust, soil and other foreign matters from contacting the waterproof and breathable member 300 through the second passage 232, so as to ensure the air permeability of the waterproof and breathable member 300 to some extent, so that the explosion-proof valve 1000 can effectively balance the pressure of the battery monomer, thereby ensuring the working performance of the explosion-proof valve 1000.

[0117] That is, by arranging the second passage 232 to have at least one bending portion, not only can the external water, dust and other foreign matters be prevented from entering the inside of the battery monomer to some extent, but also the external dust, soil and other foreign matters can be prevented from contacting the waterproof and breathable member 300 to some extent, so as to ensure the air permeability of the waterproof and breathable member 300.

[0118] In some embodiments, in combination with Figure 5 , Figure 6 , Figure 9 and Figure 10 , a radial middle portion of the valve core 210 is provided with a first mounting hole 211 penetrating therethrough, the valve rod 220 is arranged opposite to the first mounting hole 211, the first mounting hole 211 is respectively communicated with the first passage 231 and the second passage 232, and the waterproof and breathable member 300 is arranged in the first mounting hole 211. In this way, the waterproof and breathable member 300 is arranged between the first passage 231 and the second passage 232, the assembly difficulty of the waterproof and breathable member 300 is reduced, so as to prevent water, dust and other foreign matters from entering the inside of the battery monomer through the second passage 232 to some extent, thereby ensuring the normal working and safe use of the battery monomer.

[0119] In some embodiments, as shown in Figure 5And Figure 6 As shown in FIG. 11, the inner wall of the first mounting hole 211 is provided with a first matching protrusion 213, and the waterproof and breathable member 300 is arranged in the first mounting hole 211, and the outer peripheral wall of the waterproof and breathable member 300 is in abutting and matching relationship with the first matching protrusion 213, so as to realize the interference fit of the waterproof and breathable member 300 and the first mounting hole 211, thereby enabling the waterproof and breathable member 300 to be stably arranged in the first mounting hole 211, improving the positional stability of the waterproof and breathable member 300, and to a certain extent, ensuring the working performance of the waterproof and breathable member 300.

[0120] In some embodiments, as shown in FIGS. 10 and 11, Figure 5 And Figure 6 As shown in FIG. 11, the first matching protrusion 213 includes a plurality of first matching protrusions 213, and the plurality of first matching protrusions 213 are arranged at intervals along the circumference of the first mounting hole 211, and the plurality of first matching protrusions 213 are matched for increasing the interference fit effect of the waterproof and breathable member 300 and the first mounting hole 211.

[0121] In some embodiments, in combination with Figure 29 , Figure 30 , Figure 31 And Figure 32 As shown in FIGS. 10 and 11, the explosion-proof valve 1000 further comprises a pressing member 400, which is arranged in the first mounting hole 211 and is pressed against the side of the waterproof and breathable member 300 away from the first passage 231, and the pressing member 400 is provided with a first air permeation area 410, which is in communication with the waterproof and breathable member 300 and the second passage 232. Wherein, by arranging the pressing member 400 in the first mounting hole 211 and pressing it against the side of the waterproof and breathable member 300 away from the first passage 231, the waterproof and breathable member 300 can be pressed into the first mounting hole 211 by the pressing member 400, further enabling the waterproof and breathable member 300 to be stably arranged in the first mounting hole 211, improving the positional stability of the waterproof and breathable member 300, and to a certain extent, ensuring the working performance of the waterproof and breathable member 300.

[0122] At the same time, by arranging the first air permeation area 410 on the pressing member 400 and setting the first air permeation area 410 to be in communication with the waterproof and breathable member 300 and the second passage 232, the pressing member 400 can to a certain extent avoid hindering the flow of air between the waterproof and breathable member 300 and the second passage 232, thereby ensuring the working performance of the air inlet and outlet passage 230, and effectively balancing the internal and external pressures of the battery monomer.

[0123] That is, the pressing member 400 of the present application not only can press the waterproof and breathable member 300 into the first mounting hole 211, but also will not affect the air inlet and outlet function of the air inlet and outlet passage 230.

[0124] In some embodiments, the first air permeation area 410 can be an air permeation hole formed on the pressing member 400 (as shown in FIG. 12). Figure 32The air-permeable film can be a film formed on the compression member 400 (not shown in the example) or is not particularly limited here.

[0125] In some embodiments, in combination with Figure 1 , Figure 10 and Figure 11 , the explosion-proof valve 1000 further comprises a cover plate 500, as shown in Figure 5 The second channel 232 is a groove formed on the valve core 210, the cover plate 500 is arranged on the side of the valve core 210 away from the valve rod 220 and seals the groove, and the opposite ends of the groove are respectively communicated with the first channel 231 and the external space. Among them, by setting the second channel 232 as a groove formed on the valve core 210, the forming difficulty of the second channel 232 can be reduced, and the forming difficulty of the intake and exhaust channel 230 can be reduced.

[0126] At the same time, by arranging the cover plate 500 on the side of the valve core 210 away from the valve rod 220 and sealing the groove, and by respectively communicating the opposite ends of the groove with the first channel 231 and the external space, the first channel 231 and the external space are communicated with each other, and the air entering the second channel 232 can flow along the extension direction of the second channel 232, and the air can flow through the bending part, so as to prevent water, dust and other foreign matters from entering the second channel 232, and ensure the normal work and safe use of the battery cell.

[0127] In addition, by arranging the cover plate 500 on the side of the valve core 210 away from the valve rod 220, the waterproof and air-permeable member 300 can be protected by the cover plate 500, so as to avoid the pollution or damage of foreign matters to the waterproof and air-permeable member 300 to a certain extent, prolong the service life of the waterproof and air-permeable member 300, and ensure the waterproof and air-permeable performance of the waterproof and air-permeable member 300 to a certain extent.

[0128] In some embodiments, as shown in Figure 5 and Figure 6 , the side of the valve core 210 away from the valve rod 220 is provided with a glue dispensing groove 212, and the glue dispensing groove 212 is used to accommodate glue to achieve the adhesive cooperation between the cover plate 500 and the valve core 210. In addition to reducing the connection difficulty between the cover plate 500 and the valve core 210, the cover plate 500 can also be stably arranged on the valve core 210 to ensure the working performance of the cover plate 500.

[0129] In some embodiments, as shown in Figure 5 and Figure 6 , the glue dispensing groove 212 comprises a plurality of glue dispensing grooves 212, and the plurality of glue dispensing grooves 212 are arranged at intervals along the radial direction of the valve core 210. The connection strength between the cover plate 500 and the valve core 210 can be increased by the plurality of glue dispensing grooves 212, so that the cover plate 500 can be stably arranged on the valve core 210.

[0130] Of course, in other embodiments, the cover plate 500 and the valve core 210 can also be fixedly connected by welding, clamping, or the like.

[0131] In some embodiments, in combination with Figure 10 , Figure 11 , Figure 13 and Figure 14 , the cover plate 500 is provided with a protruding portion 510 protruding towards the waterproof breather 300, the protruding portion 510 is used to press the waterproof breather 300, and the protruding portion 510 is provided with a second air-permeable area 511, which communicates the waterproof breather 300 and the second channel 232. Wherein, by using the protruding portion 510 to press the waterproof breather 300, the waterproof breather 300 can be pressed into the first mounting hole 211, so that the waterproof breather 300 can be stably arranged in the first mounting hole 211, and the position stability of the waterproof breather 300 is improved, and the working performance of the waterproof breather 300 is ensured to a certain extent.

[0132] At the same time, by setting the second air-permeable area 511 on the protruding portion 510, and setting the second air-permeable area 511 to communicate the waterproof breather 300 and the second channel 232, the protruding portion 510 can to a certain extent avoid hindering the flow of air between the waterproof breather 300 and the second channel 232, thereby ensuring the working performance of the air inlet and outlet channel 230, so as to effectively balance the internal and external pressure of the battery monomer.

[0133] That is, the protruding portion 510 of the present application not only can press the waterproof breather 300 in the first mounting hole 211, but also will not affect the air inlet and outlet function of the air inlet and outlet channel 230.

[0134] In some embodiments, the second air-permeable area 511 can be an air-permeable hole (as shown in Figure 13 ) formed on the protruding portion 510, or an air-permeable film (not shown in this example) formed on the protruding portion 510, which is not limited here.

[0135] It should be noted that when the explosion-proof valve 1000 includes the pressing member 400, the waterproof breather 300 can be directly pressed by the pressing member 400, and the protruding portion 510 on the cover plate 500 is omitted (as shown in Figure 33 and Figure 34 ), so as to simplify the structure of the cover plate 500 and reduce the forming difficulty of the cover plate 500.

[0136] Correspondingly, when the cover plate 500 is provided with the protruding portion 510 protruding towards the waterproof breather 300, the waterproof breather 300 can also be directly pressed by the protruding portion 510, and the setting of the pressing member 400 is omitted (as shown in Figure 10 and Figure 11 ), so as to simplify the structure of the explosion-proof valve 1000.

[0137] Of course, in other embodiments, the protruding part 510 and the pressing part 400 (not shown in the example) can be provided at the same time, and the cooperation of the protruding part 510 and the pressing part 400 can guarantee the pressing effect, so that the waterproof and breathable part 300 can be stably arranged in the first mounting hole 211, and the working performance of the waterproof and breathable part 300 is guaranteed.

[0138] In some embodiments, the protruding part 510 is provided with a clamping part, and the clamping part is clamped and matched on the valve core 210, so that the cover plate 500 can be stably arranged on the valve core 210.

[0139] In some embodiments, the clamping part can be understood as a clamping buckle, and the valve core 210 is provided with a clamping groove corresponding to the clamping buckle, and the clamping buckle is clamped and matched in the clamping groove, so as to realize the clamping and matching of the protruding part 510 and the valve core 210, and then realize the matching connection of the cover plate 500 and the valve core 210, so that the cover plate 500 is not only bonded with the valve core 210, but also clamped, and the position stability of the cover plate 500 is maximized.

[0140] In some embodiments, as shown in Figure 13 , the cover plate 500 is provided with a third air permeable area 520, and the third air permeable area 520 communicates the second channel 232 and the external space, so as to realize the communication of the second channel 232 and the external space, thereby facilitating the balance of the internal and external pressures of the battery monomer by using the air inlet and exhaust channel 230.

[0141] In the description of the utility model, the features limited by "first", "second" and "third" can be explicitly or implicitly include one or more features, which are used to distinguish the description features, and there is no order and no difference.

[0142] In some embodiments, as shown in Figure 5 , Figure 6 and Figure 8 , the second channel 232 includes a plurality of, and the plurality of second channels 232 are arranged along the circumference of the valve core 210, and the plurality of second channels 232 are all communicated with the first channel 231. The cooperation of the plurality of second channels 232 can increase the area of the air inlet and exhaust channel 230, so that the internal and external pressures of the battery monomer can be effectively balanced by using the air inlet and exhaust channel 230, and the service life and use safety of the battery monomer are guaranteed.

[0143] In some embodiments, in combination with Figure 1 , Figure 10 and Figure 11As shown, the explosion-proof valve 1000 further comprises a driving member 600, which is configured to drive the valve rod 220 to move and drive the valve core 210 to block the exhaust hole 120. In this way, the valve core 210 can effectively block the exhaust hole 120 after the gas is discharged from the accommodating cavity, and the external water, dust and other foreign matters can be prevented from entering the battery monomer to a certain extent, so as to ensure the normal work and safe use of the battery monomer, and the explosion-proof valve 1000 can be repeatedly used, and the use cost of the explosion-proof valve 1000 is reduced.

[0144] In some embodiments, the driving member 600 is configured to drive the valve rod 220 to move and drive the valve core 210 to move towards the exhaust hole 120 after the internal pressure of the accommodating cavity is reduced, so as to block the exhaust hole 120, and the external water, dust and other foreign matters can be prevented from entering the battery monomer to a certain extent, so as to ensure the normal work and safe use of the battery monomer.

[0145] In some embodiments, when the internal pressure of the accommodating cavity continuously increases, the internal gas pressure can drive the valve rod 220 to move and drive the valve core 210 to move away from the exhaust hole 120 to open the exhaust hole 120, so as to ensure that the gas can be quickly discharged from the accommodating cavity when the battery monomer is out of control and the high-temperature and high-pressure gas is generated in the battery monomer in a short time, and the explosion-proof function is achieved.

[0146] That is, the valve core 210 moves away from the exhaust hole 120 under the action of the internal pressure of the accommodating cavity, and moves towards the exhaust hole 120 under the driving of the driving member 600, so that the valve core 210 can open or block the exhaust hole 120, and the difficulty of the reciprocating movement of the valve rod 220 relative to the valve body 100 is reduced, so as to ensure that the gas can be quickly discharged from the accommodating cavity when the battery monomer is out of control and the high-temperature and high-pressure gas is generated in the battery monomer in a short time, and the explosion-proof function is achieved, and the external water, dust and other foreign matters can be prevented from entering the battery monomer to a certain extent after the gas is discharged from the accommodating cavity, so as to ensure the normal work and safe use of the battery monomer.

[0147] In some embodiments, in combination with Figure 1 , Figure 10 and Figure 11As shown, the explosion-proof valve 1000 further comprises a support member 700, which is arranged on the side of the valve stem 220 away from the valve core 210. The driving member 600 is an elastic member, which is sleeved on the outer periphery of the valve stem 220, and the opposite ends of the elastic member are respectively abutted against the valve body 100 and the support member 700. Since the position of the valve body 100 is fixed during the exhaust pressure relief of the explosion-proof valve 1000, by abutting the opposite ends of the elastic member against the valve body 100 and the support member 700 respectively, the elastic member can be used to drive the support member 700 to move away from the valve body 100. Since the support member 700 is arranged on the side of the valve stem 220 away from the valve core 210, during the movement of the support member 700 away from the valve body 100 driven by the elastic member, the elastic member can be used to drive the valve stem 220 to move and drive the valve core 210 to move toward the exhaust hole 120 to block the exhaust hole 120, so that the valve core 210 can effectively block the exhaust hole 120 after the gas in the accommodation cavity is discharged from the accommodation cavity, which can prevent external water, dust and other foreign matters from entering the battery monomer to a certain extent, so as to ensure the normal work and safe use of the battery monomer, and the explosion-proof valve 1000 can be reused, thereby reducing the use cost of the explosion-proof valve 1000.

[0148] Meanwhile, by setting the driving member 600 as an elastic member, the structure of the driving member 600 can be simplified, the manufacturing cost of the driving member 600 can be reduced, and the blocking difficulty of the exhaust hole 120 can be reduced.

[0149] In some embodiments, when the internal pressure of the accommodation cavity continuously increases, and the force of the internal gas pressure acting on the valve core assembly 200 overcomes the driving force of the driving member 600, the gravity of the valve core assembly 200 and the friction force between the valve stem 220 and the valve body 100, the internal gas pressure drives the support member 700 to move toward the valve body 100, which not only drives the valve core 210 to move away from the exhaust hole 120 to open the exhaust hole 120, but also extrudes the elastic member by the cooperation of the support member 700 and the valve body 100, so that the elastic member is charged at this time. When the internal pressure of the accommodation cavity decreases, the elastic member has a driving force to drive the support member 700 to move away from the valve body 100, so as to control the valve core 210 to move toward the exhaust hole 120 to block the exhaust hole 120, thereby reducing the blocking difficulty of the exhaust hole 120.

[0150] In some embodiments, in combination with Figure 10 , Figure 11 and Figure 15As shown, the elastic member is a spring, the spring is sleeved on the outer periphery of the valve rod 220 and abuts against the valve body 100 and the support member 700 at opposite ends, respectively, to realize that the spring is supported by the valve body 100 and the support member 700, so that the position stability of the spring is improved, and the elastic member can effectively drive the valve rod 220 to move and drive the valve core 210 to move towards the direction close to the exhaust hole 120 to block the exhaust hole 120 after the internal pressure of the accommodating cavity is reduced.

[0151] Of course, in other embodiments, the elastic member can also be a rubber sleeve, a silica gel sleeve, etc.

[0152] In some embodiments, as shown in Figure 1 , Figure 16 and Figure 17 , the support member 700 is a support plate, which can reduce the difficulty of forming the support member 700, and also has a certain structural strength, so that the support member 700 can effectively support the elastic member and ensure the working performance of the elastic member to a certain extent.

[0153] In some embodiments, as shown in Figure 1 , Figure 9 , Figure 10 and Figure 16 , one of the support member 700 and the valve rod 220 is provided with a buckle 221, and the other is provided with a clamping groove 710, and the buckle 221 is clamped and matched in the clamping groove 710. To achieve the support member 700 is arranged on the valve rod 220, realize the fixed cooperation of the support member 700 and the valve rod 220, and reduce the cooperation difficulty of the support member 700 and the valve rod 220, so as to support the elastic member by the support member 700, and ensure the working performance of the elastic member to a certain extent.

[0154] In some embodiments, as shown in Figure 9 , Figure 16 and Figure 17 , the bottom of the valve rod 220 is provided with a buckle 221, and the support member 700 is provided with a clamping groove 710, and the clamping groove 710 is clamped and combined with the buckle 221. While achieving the fixed installation of the support member 700 to the valve rod 220, the elastic member can also be installed on the outer periphery of the valve rod 220 and fixed by the support member 700, so that the assembly process of the elastic member and the support member 700 is simple, and the assembly difficulty of the explosion-proof valve 1000 is further reduced, and the assembly efficiency is improved.

[0155] Of course, in other embodiments, the clamping groove 710 can also be arranged at the bottom of the valve rod 220, and the buckle 221 can also be arranged on the support member 700 (not shown in the example figure), so that the clamping groove 710 is clamped and combined with the buckle 221, and the support member 700 can also be fixedly installed to the valve rod 220.

[0156] In some embodiments, combined Figure 9 、 Figure 16 and Figure 17 As shown, a plurality of clips 221 are provided at the bottom of the valve stem 220, and a plurality of slots 710 are provided on the support member 700. The plurality of slots 710 are snap-fitted with the plurality of clips 221 to improve the connection strength between the support member 700 and the valve stem 220, so that the relative positions of the support member 700 and the valve stem 220 are stable, so that the support member 700 can be used to stably support the elastic member.

[0157] In some embodiments, combined Figure 11 、 Figure 18 and Figure 19 As shown, explosion-proof valve 1000 also includes a protective cover 800, which is mounted on one end of valve stem 220 and located around the outer periphery of the elastic member. On the one hand, protective cover 800 protects the elastic member, preventing foreign matter ejected from the battery cell during thermal runaway from causing the elastic member to become stuck, thereby ensuring the working performance of the elastic member and, in other words, the pressure relief effect of explosion-proof valve 1000. On the other hand, it also protects valve stem 220, preventing it from being manually moved during transportation. While preventing damage to valve stem 220, it also prevents damage to first seal 920 between valve core 210 and valve body 100, which could affect the sealing effect.

[0158] The specific function of the first sealing member 920 can be found below.

[0159] In some embodiments, combined Figure 18-24 As shown, the protective cover 800 is formed into a U-shaped structure, and the protective cover 800 is sleeved on the outer periphery of the elastic member, so that the protective cover 800 can protect the elastic member and the valve stem 220 and reduce the difficulty of assembling the protective cover 800.

[0160] In some embodiments, the protective cover 800 is fixedly connected to the valve body 100. This means that after the protective cover 800 is sleeved on one end of the valve stem 220, the protective cover 800 is fixedly connected to the valve body 100, so that the valve body 100 supports the protective cover 800, improves the position stability of the protective cover 800, and ensures the working performance of the protective cover 800 to a certain extent.

[0161] The fixed connection mentioned here may be welding, bonding or clamping, etc.

[0162] In some embodiments, as Figure 10 and Figure 11As shown, the protective cover 800 is spaced apart from the elastic member in the radial direction of the valve rod 220 to form a third channel 910 between the protective cover 800 and the valve rod 220, which respectively communicates with the air inlet and exhaust channel 230 and the exhaust hole 120. To achieve the matching communication between the air inlet and exhaust channel 230 and the containing cavity, so as to facilitate the balance of the internal and external pressure of the battery monomer and improve the use safety of the battery monomer.

[0163] In some embodiments, when the internal air pressure of the containing cavity of the battery monomer is greater than the external air pressure and needs to be balanced by exhaust through the air inlet and exhaust channel 230, the gas flows through the exhaust hole 120, the third channel 910 and the air inlet and exhaust channel 230 in sequence to exhaust; when the internal air pressure of the containing cavity of the battery monomer is less than the external air pressure and needs to be balanced by air intake through the air inlet and exhaust channel 230, the gas flows through the air inlet and exhaust channel 230, the third channel 910 and the exhaust hole 120 in sequence to intake air.

[0164] In some embodiments, in combination with Figure 11 and Figure 20 As shown, the outer peripheral wall of the protective cover 800 is provided with a communication hole 810, which communicates the third channel 910 and the containing cavity. To further achieve the matching communication between the air inlet and exhaust channel 230 and the containing cavity, so as to facilitate the balance of the internal and external pressure of the battery monomer and improve the use safety of the battery monomer.

[0165] In some embodiments, as shown in Figure 24 The outer peripheral wall of the protective cover 800 is provided with a plurality of communication holes 810, which cooperate to increase the communication effect of the third channel 910 and the containing cavity, thereby ensuring the air inlet and exhaust effect of the air inlet and exhaust channel 230, and facilitating the working performance of the explosion-proof valve 1000.

[0166] In some embodiments, in combination with Figure 1 , Figure 10 and Figure 11 The valve core 210 and the valve body 100 are provided with a first sealing member 920. The first sealing member 920 is used to realize the sealing cooperation between the valve core 210 and the valve body 100, so that when the battery monomer does not need to be relieved through the exhaust hole 120, the valve core 210 can effectively block the exhaust hole 120, so as to avoid the entry of external water, dust and other foreign matters into the battery monomer to a certain extent, so as to ensure the normal work and use safety of the battery monomer.

[0167] In some embodiments, the first sealing member 920 is a sealing ring or a sealing gasket, which is arranged between the valve core 210 and the valve body 100 to realize the sealing cooperation between the valve core 210 and the valve body 100.

[0168] In some embodiments, in combination with Figure 2 , Figure 3and Figure 4 As shown in

[0169] In some embodiments, in combination with Figure 2 、 Figure 3 and Figure 4 As shown in

[0170] In some embodiments, as shown in Figure 25 and Figure 26 The outer periphery of the first sealing piece 920 is provided with a second matching protrusion 921, and the first sealing piece 920 is arranged in the first mounting groove 140 and the second matching protrusion 921 is in abutting cooperation with the peripheral wall of the first mounting groove 140, so as to realize the interference fit between the first sealing piece 920 and the first mounting groove 140, so that the first sealing piece 920 can be stably arranged in the first mounting groove 140, improve the position stability of the first sealing piece 920, and to a certain extent, guarantee the working performance of the first sealing piece 920.

[0171] In some embodiments, as shown in Figure 25 and Figure 26 The second matching protrusion 921 includes a plurality of second matching protrusions 921, and the plurality of second matching protrusions 921 are arranged at intervals along the circumference of the first sealing piece 920, and the plurality of second matching protrusions 921 are matched to increase the interference fit effect between the first sealing piece 920 and the first mounting groove 140.

[0172] Of course, in other embodiments, as shown in Figure 35 and Figure 36 The second matching protrusion 921 can also not be arranged on the outer periphery of the first sealing piece 920, so as to simplify the structure of the first sealing piece 920 and reduce the manufacturing difficulty of the first sealing piece 920.

[0173] The battery cover plate of the utility model embodiment is described below.

[0174] According to the battery cover plate of the utility model embodiment, the battery cover plate comprises a cover plate body and an explosion-proof valve 1000.

[0175] Among them, the cover plate body is provided with a second mounting hole.

[0176] The explosion-proof valve 1000 is the aforementioned explosion-proof valve 1000, and the specific structure of the explosion-proof valve 1000 is not described herein again. The valve body 100 is arranged on the cover plate body, the matching hole 110 is opposite to the second mounting hole, and the valve rod 220 is arranged through the second mounting hole. Here, when the valve body 100 is arranged on the cover plate body, the matching hole 110 on the valve body 100 is opposite to the second mounting hole, and the valve rod 220 is movably arranged through the matching hole 110, the valve rod 220 is arranged through the second mounting hole at the same time, so that the inlet and outlet passages 230 on the valve core assembly 200 are communicated with the accommodating cavity, thereby facilitating the balance of the pressure inside and outside the battery monomer by using the inlet and outlet passages 230, and ensuring the use safety of the battery monomer.

[0177] In some embodiments, the cover plate body is further provided with a pressure relief channel, and the pressure relief channel is communicated with the exhaust hole 120, so as to facilitate the matching communication between the exhaust hole 120 and the accommodating cavity.

[0178] From the above structure, it can be seen that the battery cover plate in the embodiment of the utility model can reduce the assembly difficulty of the battery cover plate and improve the assembly efficiency by using the aforementioned explosion-proof valve 1000.

[0179] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 4 , the valve body 100 is provided with a plurality of third mounting holes 130, and the valve body 100 is fixedly connected to the cover plate body through fasteners arranged through the third mounting holes 130. While reducing the connection difficulty of the valve body 100 and the cover plate body, the connection quality is also ensured, so that the valve body 100 can be stably arranged on the cover plate body, and then the explosion-proof valve 1000 can be stably arranged on the cover plate body, so as to ensure the working performance of the explosion-proof valve 1000.

[0180] Among them, the fastener mentioned here can be a bolt, a screw, etc.

[0181] In some embodiments, a second sealing member 930 is arranged between the valve body 100 and the cover plate body (the specific structure of the second sealing member 930 can be referred to Figure 1 , Figure 27 and Figure 28 ). The second sealing member 930 is used to realize the sealing cooperation between the valve body 100 and the cover plate body, so as to prevent foreign matters such as water and dust from entering the battery monomer through the space between the valve body 100 and the cover plate body, and ensure the normal work and use safety of the battery monomer.

[0182] In some embodiments, the second sealing member 930 is a sealing ring or a sealing gasket, which is arranged between the valve body 100 and the cover plate body to realize the sealing cooperation between the valve body 100 and the cover plate body.

[0183] In some embodiments, as shown in Figure 2 ,Figure 3 and Figure 4 As shown in

[0184] In some embodiments, in combination with Figure 2 , Figure 3 and Figure 4 As shown in, the second installation groove 150 is a second annular groove, and the second annular groove is arranged around the outer periphery of the exhaust hole 120, so that the valve body 100 and the cover plate body are sealed and connected, and the exhaust hole 120 and the containing cavity are communicated, so that the gas in the containing cavity is quickly discharged through the exhaust hole 120, the explosion-proof function is achieved, and the use safety of the battery monomer is improved.

[0185] In some embodiments, as shown in Figure 27 and Figure 28 As shown, the outer periphery of the second sealing member 930 is provided with a third matching protrusion 931, the second sealing member 930 is arranged in the second installation groove 150, and the third matching protrusion 931 is in abutting cooperation with the peripheral wall of the second installation groove 150, so as to realize the interference fit between the second sealing member 930 and the second installation groove 150, so that the second sealing member 930 can be stably arranged in the second installation groove 150, the position stability of the second sealing member 930 is improved, and the working performance of the second sealing member 930 is ensured to a certain extent.

[0186] In some embodiments, as shown in Figure 27 and Figure 28 As shown, the third matching protrusion 931 includes a plurality of third matching protrusions 931, and the plurality of third matching protrusions 931 are arranged at intervals along the circumference of the second sealing member 930, and the plurality of third matching protrusions 931 are matched to increase the interference fit effect between the second sealing member 930 and the second installation groove 150.

[0187] Of course, in other embodiments, the third matching protrusion 931 (not shown in the example) can not be arranged on the outer periphery of the second sealing member 930, so as to simplify the structure of the second sealing member 930 and reduce the manufacturing difficulty of the second sealing member 930.

[0188] The battery monomer of the embodiment of the utility model is described below.

[0189] According to the battery monomer of the embodiment of the utility model, the battery monomer comprises a shell, a pole core and a battery cover plate.

[0190] The shell is provided with an open containing cavity, and the pole core is arranged in the containing cavity. The pole core is arranged in the shell of the battery monomer, which facilitates the assembly of the battery monomer, protects the pole core by the shell, prolongs the service life of the pole core, and improves the use safety of the pole core.

[0191] The battery cover plate is the aforementioned battery cover plate, and a specific structure of the battery cover plate is not described herein again.

[0192] Meanwhile, since the inlet and outlet passage 230 is communicated with the accommodating cavity, when the internal pressure of the accommodating cavity is greater than the external pressure, the gas in the accommodating cavity can be discharged to the outside through the inlet and outlet passage 230; when the internal pressure of the accommodating cavity is less than the external pressure, the external gas can be supplemented into the accommodating cavity through the inlet and outlet passage 230, so as to balance the internal and external pressures of the battery monomer, improve the use safety of the battery monomer, and be beneficial to prolonging the service life of the battery monomer.

[0193] In addition, since the explosion-proof valve 1000 of the aforementioned battery cover plate is simple and convenient to assemble, the assembly difficulty of the battery monomer can be reduced by using the aforementioned battery cover plate.

[0194] As can be seen from the above structure, the battery monomer of the embodiment of the utility model can reduce the assembly difficulty of the battery monomer, improve the use safety of the battery monomer, and prolong the service life of the battery monomer at the same time by using the aforementioned battery cover plate.

[0195] The battery pack of the embodiment of the utility model is described below.

[0196] The battery pack according to the embodiment of the utility model comprises a battery monomer.

[0197] The battery monomer is the aforementioned battery monomer, and a specific structure of the battery monomer is not described herein again.

[0198] As can be seen from the above structure, the battery pack of the embodiment of the utility model can reduce the assembly difficulty of the battery pack, improve the use safety of the battery pack, and prolong the service life of the battery pack by using the aforementioned battery monomer.

[0199] In some embodiments, the battery pack comprises a plurality of battery monomers, and the plurality of battery monomers are matched to be beneficial to increasing the capacity of the battery pack and ensuring the working performance of the battery pack to a certain extent.

[0200] In some embodiments, the plurality of battery monomers can be connected in series, in parallel or in a mixed manner, the mixed manner refers to that the plurality of battery monomers are connected in series and in parallel, and the plurality of battery monomers can be directly connected in series, in parallel or in a mixed manner.

[0201] The power consumption device of the embodiment of the utility model is described below.

[0202] The electric device according to an embodiment of the present application comprises a battery pack.

[0203] The battery pack is the aforementioned battery pack, and the specific structure of the battery pack is not described here.

[0204] From the above structure, the electric device according to the embodiment of the present application adopts the aforementioned battery pack to ensure the working performance of the electric device and improve the use safety of the electric device.

[0205] It should be noted that the electric device of the present application includes but is not limited to vehicles, ships, spacecraft, etc.

[0206] When the electric device is a vehicle, the vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc.

[0207] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0208] Figure 8 Two second channels 232 are shown for illustrative purposes, but a person skilled in the art will understand that the scheme can be applied to three or more second channels 232 after reading the above technical solution, which also falls within the scope of protection of the present application.

[0209] The other configurations of the explosion-proof valve 1000, the battery cover plate, the battery monomer, the battery pack and the electric device according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0210] In the description of the present application, the description of the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0211] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An explosion-proof valve, characterized in that: include: A valve body (100), wherein the valve body (100) is provided with a matching hole (110) and an exhaust hole (120) passing therethrough, and the exhaust hole (120) is suitable for communicating with the accommodating cavity of the battery cell; A valve core assembly (200), the valve core assembly (200) comprising a valve core (210) and a valve stem (220) connected to the valve core (210), the valve core (210) and the valve stem (220) forming an integral part, the valve core (210) being arranged on one side of the valve body (100) and facing the exhaust hole (120), the valve stem (220) being movably arranged through the matching hole (110) to drive the valve core (210) to open or block the exhaust hole (120), and the valve core assembly (200) being provided with an air inlet and outlet passage (230) communicating with the accommodating cavity.

2. The explosion-proof valve according to claim 1, characterized in that: The valve core (210) and the valve stem (220) are made of nylon, polyphenylene sulfide or polyurethane.

3. The explosion-proof valve according to claim 1, characterized in that: The air inlet and outlet passage (230) comprises a first passage (231) and a second passage (232) connected to each other, wherein the first passage (231) is provided on the valve stem (220) and communicates with the accommodating cavity, and the second passage (232) is provided on the valve core (210), and the second passage (232) is suitable for communicating with the external space of the explosion-proof valve.

4. The explosion-proof valve according to claim 3, characterized in that: The second channel (232) has at least one bend.

5. The explosion-proof valve according to claim 4, characterized in that: The second channel (232) includes a plurality of first portions (2322) extending along the circumference of the valve core (210) and a second portion (2323) extending along the radial direction of the valve core (210), and the first portions (2322) and the second portions (2323) adjacent thereto define the bending portion.

6. The explosion-proof valve according to claim 3, characterized in that: A waterproof and breathable member (300) is provided between the first channel (231) and the second channel (232).

7. The explosion-proof valve according to claim 6, characterized in that: A first mounting hole (211) is provided in the radial middle portion of the valve core (210) and passes through the valve core (210). The valve stem (220) is arranged opposite to the first mounting hole (211). The first mounting hole (211) is connected to the first channel (231) and the second channel (232) respectively. The waterproof breathable member (300) is arranged in the first mounting hole (211).

8. The explosion-proof valve according to claim 7, characterized in that: The invention also includes a pressing member (400), wherein the pressing member (400) is arranged in the first mounting hole (211) and is pressed against a side of the waterproof breathable member (300) facing away from the first channel (231), and the pressing member (400) is provided with a first breathable area (410), and the first breathable area (410) is connected to the waterproof breathable member (300) and the second channel (232).

9. The explosion-proof valve according to claim 6, characterized in that: The valve core (210) further comprises a cover plate (500), wherein the second channel (232) is a groove formed on the valve core (210), and the cover plate (500) is arranged on a side of the valve core (210) facing away from the valve stem (220) and seals the groove, and opposite ends of the groove are respectively connected to the first channel (231) and the external space.

10. The explosion-proof valve according to claim 9, characterized in that: The cover plate (500) is provided with a raised portion (510) raised toward the waterproof breathable member (300), the raised portion (510) being used to press the waterproof breathable member (300), and a second breathable area (511) being provided on the raised portion (510), the second breathable area (511) being connected to the waterproof breathable member (300) and the second channel (232).

11. The explosion-proof valve according to claim 3, characterized in that: The second channels (232) include a plurality of second channels (232), which are arranged at intervals along the circumference of the valve core (210), and the plurality of second channels (232) are all connected to the first channel (231).

12. The explosion-proof valve according to claim 1, characterized in that: The valve stem (220) is further provided with a driving member (600) for driving the valve stem (220) to move and drive the valve core (210) to block the exhaust hole (120).

13. The explosion-proof valve according to claim 12, characterized in that: The valve stem (220) further comprises a support member (700), wherein the support member (700) is arranged on a side of the valve stem (220) facing away from the valve core (210), and the driving member (600) is an elastic member, which is sleeved on the outer periphery of the valve stem (220), and the opposite ends of the elastic member respectively stop against the valve body (100) and the support member (700).

14. The explosion-proof valve according to claim 13, characterized in that: One of the support member (700) and the valve stem (220) is provided with a buckle (221), and the other is provided with a slot (710), and the buckle (221) is snap-fitted into the slot (710).

15. The explosion-proof valve according to claim 13, characterized in that: It also includes a protective cover (800), which is sleeved on one end of the valve stem (220) and located on the outer periphery of the elastic member.

16. The explosion-proof valve according to claim 15, characterized in that: The protective cover (800) is fixedly connected to the valve body (100).

17. The explosion-proof valve according to claim 15, characterized in that: In the radial direction of the valve stem (220), the protective cover (800) and the elastic member are spaced apart to form a third channel (910) between the protective cover (800) and the valve stem (220), and the third channel (910) is connected to the intake and exhaust channels (230) and the exhaust hole (120) respectively.

18. The explosion-proof valve according to claim 17, characterized in that: A communication hole (810) is provided on the outer peripheral wall of the protective cover (800), and the communication hole (810) communicates with the third channel (910) and the accommodating cavity.

19. The explosion-proof valve according to claim 1, characterized in that A first sealing member (920) is provided between the valve core (210) and the valve body (100).

20. A battery cover, characterized in that: include: a cover plate body, wherein the cover plate body is provided with a second mounting hole; An explosion-proof valve, wherein the explosion-proof valve is an explosion-proof valve according to any one of claims 1 to 19, wherein the valve body (100) is arranged on the cover plate body, the matching hole (110) is opposite to the second mounting hole, and the valve stem (220) is passed through the second mounting hole.

21. The battery cover according to claim 20, characterized in that: A second sealing member (930) is provided between the valve body (100) and the cover plate body.

22. A battery cell, characterized in that: include: a housing, wherein an opening accommodating cavity is provided in the housing; A pole core, the pole core being arranged in the accommodating cavity; A battery cover plate, wherein the battery cover plate is the battery cover plate according to claim 20 or 21, the battery cover plate is arranged at the opening, and the exhaust hole (120) and the air inlet and exhaust channel (230) of the explosion-proof valve are both connected to the accommodating cavity.

23. A battery pack, characterized in that: Comprising the battery cell according to claim 22.

24. An electrical device, characterized in that: Comprising the battery pack according to claim 23.

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