Explosion-proof valve, battery pack and vehicle

Abstract

The utility model discloses an anti-explosion valve, a battery pack and a vehicle, and relates to the technical field of new energy automobiles. The anti-explosion valve comprises a base, a cover body and a valve element, the base comprises a base plate and a first connecting pipe connected with the base plate, and an air inlet is formed in the base plate; the cover body comprises a cover plate and a second connecting pipe connected with the cover plate, the second connecting pipe is in threaded connection with the first connecting pipe, an air outlet is formed in the cover body, a valve cavity is defined by the cover plate, the base plate, the first connecting pipe and the second connecting pipe, and the valve cavity is connected with the air inlet and the air outlet; the valve element is arranged in the valve cavity and located between the air inlet and the air outlet, and the valve element divides the valve cavity into an air inlet cavity communicated with the air inlet and an air outlet cavity communicated with the air outlet. The anti-explosion valve has the advantage of being convenient to disassemble, the second connecting pipe and the first connecting pipe can be separated through rotation, the cover body can be disassembled, and then the waterproof breathable film can be replaced or maintained. The explosion-proof valve not only reduces the maintenance difficulty and cost, but also improves the overall reliability and service life of the battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and particularly relates to an explosion-proof valve, a battery pack and a vehicle. Background Art

[0002] The traditional partial thimble type explosion-proof valve design often adopts an integral structure. This integrated design has limitations: when the internal waterproof and breathable membrane is damaged for various reasons, users or maintenance personnel cannot repair or replace the waterproof and breathable membrane alone, but must replace the entire explosion-proof valve as a whole. This not only increases the maintenance cost, but also may bring additional risks and complexities due to the need to disassemble other components of the battery pack during the replacement process.

[0003] In addition, in the design of another type of explosion-proof valve, the mounting bolts are arranged inside the battery pack. This design increases the complexity of the process during assembly because the internal space of the battery pack needs to be exposed first to install or disassemble the bolts. And removing the battery upper cover to access these bolts is not only cumbersome in operation, but also may increase the failure probability of the sealing structure between the upper cover and the battery pack box body. The sealing failure may cause a change in the internal environment of the battery pack, affect the battery performance, and even cause potential safety hazards.

[0004] Therefore, there is room for improvement in the explosion-proof valve. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the first aspect of the utility model aims to provide an explosion-proof valve, which adopts a detachable connection method, making the disassembly process simple and fast, and capable of reducing the maintenance cost and complexity.

[0006] The second aspect of the utility model aims to provide a battery pack.

[0007] The third aspect of the utility model aims to provide a vehicle.

[0008] The explosion-proof valve according to the first aspect embodiment of the utility model includes: a base, the base includes a substrate and a first connecting pipe connected thereto, and an air inlet is provided on the substrate; a cover body, the cover body includes a cover plate and a second connecting pipe connected thereto, the second connecting pipe is screwed to the first connecting pipe, an air outlet is provided on the cover body, and the cover plate, the substrate, the first connecting pipe, and the second connecting pipe enclose a valve cavity, and the valve cavity is connected to both the air inlet and the air outlet; a valve core, the valve core is arranged in the valve cavity and is located between the air inlet and the air outlet, and the valve core divides the valve cavity into an air inlet cavity communicating with the air inlet and an air outlet cavity communicating with the air outlet.

[0009] The explosion-proof valve according to the first aspect embodiment of the present utility model realizes a reliable explosion-proof function by setting a combination of a base, a cover body and a valve core. The intake port is provided on the base to provide a passage for high-pressure to enter the valve cavity, and the first connecting pipe and the second connecting pipe of the cover body are tightly connected by a threaded connection method. This design not only ensures the stability of the connection but also facilitates subsequent disassembly and maintenance. The outlet port is provided on the cover body to enable the high-pressure gas to be discharged smoothly.

[0010] By setting the valve core, when the internal pressure of the battery pack rises abnormally, the valve core can respond quickly, open the exhaust passage, and release the excessive pressure in time, thus avoiding dangerous situations such as explosion of the battery pack.

[0011] In addition, the explosion-proof valve of the present utility model also has the characteristic of being convenient to disassemble. When it is necessary to replace the valve core (waterproof breathable film) or perform other maintenance, only need to rotate and separate the second connecting pipe and the first connecting pipe to disassemble the cover body, and then replace or repair the waterproof breathable film. This design not only reduces the maintenance difficulty and cost but also improves the overall reliability and service life of the battery pack.

[0012] According to some embodiments of the present utility model, one of the first connecting pipe and the second connecting pipe is an outer connecting pipe and the other is an inner connecting pipe. The inner circumferential surface of the outer connecting pipe has internal threads, and the outer circumferential surface of the inner connecting pipe has external threads; the valve core is sheet-shaped, and the edge of the valve core is clamped between the outer connecting pipe and the inner connecting pipe.

[0013] In some embodiments, the outer connecting pipe includes: a first pipe section, on which the internal threads are provided and cooperate with the inner connecting pipe; a second pipe section, the second pipe section is axially connected to one end of the first pipe section, and the inner diameter of the second pipe section is smaller than the inner diameter of the first pipe section, and the edge of the valve core is clamped between the end of the second pipe section and the end of the inner connecting pipe.

[0014] In some embodiments, the outer connecting pipe further includes: a third pipe section, the third pipe section is connected between the first pipe section and the second pipe section, the inner diameter of the third pipe section is larger than the inner diameter of the first pipe section and smaller than the inner diameter of the second pipe section, and the end of the third pipe section abuts against the end of the inner connecting pipe; the thickness of the valve core in the natural state is greater than or equal to the axial dimension of the third pipe section.

[0015] In some embodiments, it further includes: a first sealing member provided between the outer connecting pipe and the inner connecting pipe, and the first sealing member is located at the end of the outer connecting pipe away from the valve core.

[0016] In some embodiments, the external connecting pipe further includes: a fourth pipe section connected to one end of the first pipe section away from the second pipe section, and the inner diameter of the fourth pipe section is greater than that of the first pipe section; the internal connecting pipe includes, arranged in sequence along the axial direction and with the outer diameters increasing in sequence: an internal connecting first section, an internal connecting second section, and an internal connecting third section, and the external thread is provided on the internal connecting first section; the inner diameter of the fourth pipe section is equal to the outer diameter of the internal connecting third section, and a first accommodating groove is defined between the outer peripheral surface of the internal connecting second section and the inner peripheral surface of the fourth pipe section, and the first sealing member is located in the first accommodating groove.

[0017] For the explosion-proof valve according to some embodiments of the present invention, the valve core includes: a waterproof and breathable membrane; the valve core further includes: a thimble disposed on the side of the waterproof and breathable membrane facing the cover plate to pierce the waterproof and breathable membrane after the waterproof and breathable membrane bulges.

[0018] An object of the second aspect of the present invention is to provide a battery pack, including: an explosion-proof valve; a housing having an opening, the explosion-proof valve is installed at the opening, and the base is installed on the housing. The explosion-proof valve adopts the explosion-proof valve described in the embodiments of the first aspect of the present invention.

[0019] The battery pack according to the embodiments of the present invention takes into account both safety and maintainability.

[0020] In some embodiments, the substrate is located inside the housing, and a ring-shaped second accommodating groove is defined between the substrate and the housing; the explosion-proof valve further includes a second sealing member located in the second accommodating groove.

[0021] An object of the third aspect of the present invention is to provide a vehicle, including a battery pack. The battery pack adopts the battery pack described in the embodiments of the second aspect of the present invention.

[0022] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1 is a schematic structural diagram of the explosion-proof valve in the embodiment of the present invention;

[0025] Figure 2 is an exploded view of the explosion-proof valve in the embodiment of the present invention;

[0026] Figure 3This is a cross-sectional view of the explosion-proof valve in the embodiment of the present utility model;

[0027] Figure 4 It is Figure 3 a partial enlarged view of the position A in

[0028] Figure 5 It is Figure 3 a partial enlarged view of the position B in

[0029] Reference numerals:

[0030] Battery pack 1000,

[0031] Explosion-proof valve 100,

[0032] Base 110, substrate 111, air inlet 1111, mounting hole 1112, first connecting pipe 112, inner connecting pipe 113, inner connecting section 1131, inner connecting section 1132, inner connecting section 1133,

[0033] Cover 120, cover plate 121, second connecting pipe 122, outer connecting pipe 123, first pipe section 1231, second pipe section 1232, third pipe section 1233, fourth pipe section 1234, air outlet 124,

[0034] Valve cavity 130, air inlet cavity 131, air outlet cavity 132,

[0035] Valve core 140, waterproof breathable membrane 141, thimble 142,

[0036] First seal 150, first receiving groove 160, second seal 170,

[0037] Housing 200, opening 210, connecting hole 220, second receiving groove 230. Detailed implementation manners

[0038] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model. In addition, features defined as "first", "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] The following refers to Figure 1 - Figure 5 Describe the explosion-proof valve 100 according to an embodiment of the present utility model.

[0042] As Figure 1 - Figure 2 As shown, the explosion-proof valve 100 according to some embodiments of the first aspect of the present utility model includes: a base 110, a cover 120, and a valve core 140.

[0043] As Figure 3 As shown, the base 110 includes a base plate 111 and a connected first connecting pipe 112, and an air inlet 1111 is provided on the base plate 111.

[0044] The cover 120 includes a cover plate 121 and a connected second connecting pipe 122. The second connecting pipe 122 is screwed to the first connecting pipe 112. An air outlet 124 is provided on the cover 120. The cover plate 121, the base plate 111, the first connecting pipe 112, and the second connecting pipe 122 enclose a valve cavity 130, and the valve cavity 130 is connected to both the air inlet 1111 and the air outlet 124.

[0045] The valve core 140 is arranged in the valve cavity 130 and is located between the air inlet 1111 and the air outlet 124. The valve core 140 divides the valve cavity 130 into an air inlet cavity 131 communicating with the air inlet 1111 and an air outlet cavity 132 communicating with the air outlet 124.

[0046] The base 110 serves as the main body of the explosion-proof valve 100 and has a certain degree of stability and reliability. In the above embodiment, the base 110 includes a substrate 111 and a first connecting pipe 112 connected to the substrate 111, thereby enabling the effect of gas inlet and outlet.

[0047] Among them, the substrate 111 serves as the basic part of the base 110, and an air inlet 1111 is provided thereon. The air inlet 1111 is the entrance for gas to enter the explosion-proof valve 100. In some solutions, the shape and size of the air inlet 1111 need to be designed according to actual requirements to ensure that gas can flow smoothly into the explosion-proof valve 100.

[0048] The first connecting pipe 112 connected to the substrate 111 is the bridge for connecting the base 110 with other parts (such as the cover 120).

[0049] The cover 120 serves as the top component of the explosion-proof valve 100 and cooperates with the base 110 to jointly form the structure of the explosion-proof valve 100.

[0050] Among them, the cover plate 121 serves as the main part of the cover 120 and, similar to the base 110, has a certain degree of stability and reliability to ensure that it can withstand the high pressure inside the explosion-proof valve 100.

[0051] The second connecting pipe 122, as the component for connecting the cover 120 to the outside, has a structure adapted to the first connecting pipe 112 to achieve a stable and reliable connection.

[0052] The first connecting pipe 112 and the second connecting pipe 122 are set to be threadedly connected.

[0053] This connection method not only has a simple structure, is conducive to production, but also has good sealing performance after connection, which can reduce the probability of gas leakage. At the same time, the threaded connection is also convenient for disassembly and maintenance, improving the maintainability of the explosion-proof valve 100.

[0054] The function of opening the air outlet 124 on the cover 120 is to allow gas to be discharged from the valve cavity 130 to achieve the purpose of releasing pressure.

[0055] In some embodiments, the air outlet 124 is provided on the top wall and / or side wall of the cover 120.

[0056] Combined Figure 1 , when the air outlet 124 is provided on the top wall of the cover 120, the gas can be directly discharged upward, which is beneficial to reducing the obstruction and disturbance of the gas during the discharge process and making the discharge smoother.

[0057] When the air outlet 124 is provided on the side wall of the cover 120 (not shown in the figure), it can provide another way for the explosion-proof valve 100 to discharge gas. In some cases, due to space limitations or requirements for the discharge direction, setting the air outlet 124 on the side wall of the cover 120 can release pressure in a specific direction to meet specific safety specifications.

[0058] Specifically, the air inlet 1111 is responsible for introducing external gas from the base 110 into the valve cavity 130, and the air outlet 124 located on the cover 120 is responsible for discharging the gas from the valve cavity 130 to ensure that the gas can flow inside the explosion-proof valve 100 along a predetermined path and conditions.

[0059] The valve core 140, as an important component of the explosion-proof valve 100, can adjust its state according to the air pressure change inside the valve. Specifically, when the air pressure inside the valve cavity 130 rises to a preset threshold value, the valve core 140 can automatically respond to this change and quickly open, thereby allowing a large amount of high-pressure gas to be discharged from the air outlet 124 to maintain the pressure balance inside the valve cavity 130.

[0060] This automatic adjustment function of the valve core 140 is realized through its own structure. For example, the valve core 140 can adopt sensitive components such as diaphragms and scored plates, which are highly sensitive to air pressure changes and can quickly sense and respond to the pressure fluctuations inside the valve cavity 130. When the internal air pressure rises, the sensitive component is deformed under the action of pressure, and then the valve core 140 is opened to achieve pressure release.

[0061] Optionally, the air outlet 124 is a plurality of arc-shaped holes, and the plurality of arc-shaped holes are arranged in a circumferential array on the cover plate 121. With this setting, on the one hand, the arc-shaped holes serve as effective gas outlets to ensure that the gas accumulated in the valve cavity 130 can be discharged smoothly; on the other hand, the non-arc-shaped hole area on the cover plate 121 can block external objects to a certain extent from entering the air outlet cavity 132 through the gaps, thereby avoiding interference with the internal structure of the explosion-proof valve 100 and potential safety hazards caused by these foreign objects.

[0062] In some alternative embodiments, in combination with Figure 1 - Figure 2 , a handwheel structure is formed on the outer periphery of the cover plate 121. It is convenient for manual opening or closing of the cover to avoid slipping.

[0063] As Figure 3 shown, for the explosion-proof valve 100 according to the embodiment of the present invention, by providing the detachably connected first connecting pipe 112 and second connecting pipe 122, the installation and maintenance efficiency of the explosion-proof valve 100 is improved.

[0064] When the explosion-proof valve 100 needs to be maintained, the first connecting pipe 112 and the second connecting pipe 122 can be quickly disassembled, so as to conveniently access internal components such as the valve core 140. This design shortens the maintenance time and reduces the maintenance cost.

[0065] Especially when the valve core 140 needs to be replaced, the detachable connection design makes the replacement process simpler and faster. There is no need to disassemble the entire explosion-proof valve 100 from the system. Just disassemble the first connecting pipe 112 and the second connecting pipe 122, and the valve core 140 can be exposed, facilitating the operator to replace it.

[0066] According to the explosion-proof valve 100 of some embodiments of the present utility model, one of the first connecting pipe 112 and the second connecting pipe 122 is an outer connecting pipe 123, and the other is an inner connecting pipe 113. The inner peripheral surface of the outer connecting pipe 123 has internal threads, and the outer peripheral surface of the inner connecting pipe 113 has external threads. The valve core 140 is sheet-shaped, and the edge of the valve core 140 is clamped between the outer connecting pipe 123 and the inner connecting pipe 113.

[0067] The threaded connection between the outer connecting pipe 123 and the inner connecting pipe 113 ensures the tightness and stability of the connection between the two. When the inner connecting pipe 113 is screwed into the outer connecting pipe 123, the tight combination of the internal and external threads not only forms a firm mechanical connection but also provides a certain degree of sealing, effectively preventing abnormal leakage of gas or liquid from the connection.

[0068] The valve core 140 is configured as a sheet structure, and its edge is clamped between the outer connecting pipe 123 and the inner connecting pipe 113. This clamping method not only fixes the position of the valve core 140 but also ensures its stability in a high-pressure environment, preventing the valve core 140 from shifting or failing due to air pressure fluctuations. The tight connection between the outer connecting pipe 123 and the inner connecting pipe 113 provides a stable working environment for the valve core 140, reducing the risk of the valve core 140 loosening or being damaged due to vibration or impact.

[0069] In addition, since the sheet-shaped valve core 140 is directly located in the valve cavity 130, this layout enables the valve core 140 to more directly respond to the air pressure changes inside the valve cavity 130. When the internal air pressure gradually rises and reaches the preset threshold, the sheet-shaped valve core 140 can open the channel connecting the air inlet cavity 131 and the air outlet cavity 132, thereby allowing high-pressure gas to quickly discharge, avoiding the explosion risk that may be caused by excessive pressure inside the valve cavity 130.

[0070] In the following description of this application, the first connecting pipe 112 is taken as the inner connecting pipe 113 and the second connecting pipe 122 is taken as the outer connecting pipe 123 as an example for illustration. Those skilled in the art can easily understand the implementation scheme in which the first connecting pipe 112 is the outer connecting pipe 123 and the second connecting pipe 122 is the inner connecting pipe 113 after reading the following description.

[0071] In some embodiments, as Figure 4 shown, the outer connecting pipe 123 includes: a first pipe section 1231 and a second pipe section 1232.

[0072] The internal thread is provided on the first pipe section 1231 and is matched with the inner connecting pipe 113. The second pipe section 1232 is axially connected to one end of the first pipe section 1231. The inner diameter ID2 of the second pipe section 1232 is smaller than the inner diameter ID1 of the first pipe section 1231. The edge of the valve core 140 is clamped between the end of the second pipe section 1232 and the end of the inner connecting pipe 113.

[0073] Here, since the explosion-proof valve 100 is usually a cylinder, the axial direction refers to the direction along the length of the explosion-proof valve 100.

[0074] In the above technical solution, the second pipe section 1232 forms a contraction section axially, providing a more compact and stable space for clamping the valve core 140. When the inner connecting pipe 113 is screwed into the first pipe section 1231 and jointly clamps the valve core 140 with the second pipe section 1232, the edge of the valve core 140 is firmly clamped between the end of the second pipe section 1232 and the end of the inner connecting pipe 113.

[0075] This clamping method not only fixes the position of the valve core 140, preventing its movement or loosening during operation, but also enhances the sealing effect of the edge of the valve core 140 through the tight fit between the second pipe section 1232 and the inner connecting pipe 113. Even in a high-pressure environment, it is difficult for gas to leak from the gap between the valve core 140 and the connecting pipe, thus ensuring the sealing performance and safety of the explosion-proof valve 100.

[0076] In addition, due to the smaller inner diameter of the second pipe section 1232, when the air pressure inside the valve cavity 130 rises to the threshold value that needs to be released, the high-pressure gas will push the valve core 140 against the end of the second pipe section 1232, and the end of the second pipe section 1232 provides a solid supporting surface for the valve core 140. This support not only stabilizes the position of the valve core 140, but also ensures that the valve core 140 can be smoothly opened under the push of the high-pressure gas, thereby improving the overall performance and reliability of the explosion-proof valve 100.

[0077] In some embodiments, as Figure 4 shown, the outer connecting pipe 123 further includes: a third pipe section 1233. The third pipe section 1233 is connected between the first pipe section 1231 and the second pipe section 1232. The inner diameter ID3 of the third pipe section 1233 is larger than the inner diameter ID1 of the first pipe section 1231 and smaller than the inner diameter ID2 of the second pipe section 1232. The end of the third pipe section 1233 abuts against the end of the inner connecting pipe 113. The thickness of the valve core 140 in the natural state is greater than or equal to the axial dimension of the third pipe section 1233.

[0078] When the inner pipe 113 is screwed into the outer pipe 123, the end of the third pipe section 1233 will tightly abut against the end of the inner pipe 113. This abutting method not only ensures a firm connection between the inner pipe 113 and the outer pipe 123.

[0079] In addition, the side wall of the third pipe section 1233 also forms an abutting effect on the side of the valve core 140 in the radial direction. With this arrangement, the spatial relationship between the third pipe section 1233 and the valve core 140 is utilized to provide an additional lateral support for the valve core 140. This helps to maintain the stable position of the valve core 140 and prevent it from shifting or shaking due to external vibration.

[0080] In some embodiments, as Figure 3 shown, the explosion-proof valve 100 further includes: a first seal 150 provided between the outer pipe 123 and the inner pipe 113, and the first seal 150 is located at one end of the outer pipe 123 away from the valve core 140.

[0081] First of all, by providing the first seal 150, high-pressure gas can be effectively isolated and sealed to prevent it from leaking from the connection. Reducing the leakage of high-pressure gas from the connection helps to prevent the explosion-proof valve 100 from deforming or being damaged under high pressure. If high-pressure gas continuously leaks from the connection, a pressure difference will be formed around the connection, and this pressure difference may gradually lead to material fatigue, plastic deformation or even rupture. The first seal 150 can improve the performance of the explosion-proof valve 100.

[0082] Secondly, when the explosion-proof valve 100 is applied to the battery pack 1000, the valve cavity 130 is in communication with the inside of the battery pack 1000 through the air inlet 1111, and there is electrolyte in the battery pack 1000. The first seal 150 can prevent the electrolyte from seeping out through small gaps or connections. Therefore, this sealing performance not only ensures the stability of the internal environment of the battery pack 1000, but also correspondingly extends the service life of the battery pack 1000 and its components.

[0083] In some embodiments, as Figure 5 shown, the outer pipe 123 further includes: a fourth pipe section 1234, the fourth pipe section 1234 is connected to one end of the first pipe section 1231 away from the second pipe section 1232, and the inner diameter ID4 of the fourth pipe section 1234 is greater than the inner diameter ID1 of the first pipe section 1231. The inner pipe 113 includes, arranged in sequence along the axial direction and with the outer diameters increasing in sequence: an inner-connected first section 1131, an inner-connected second section 1132, and an inner-connected third section 1133, and an external thread is provided on the inner-connected first section 1131; the inner diameter ID4 of the fourth pipe section 1234 is equal to the outer diameter of the inner-connected third section 1133, and a first accommodation groove 160 is defined between the outer peripheral surface of the inner-connected second section 1132 and the inner peripheral surface of the fourth pipe section 1234, and the first seal 150 is located in the first accommodation groove 160.

[0084] Here, the inner diameter of the first pipe section 1231 is ID1, the inner diameter of the second pipe section 1232 is ID2, the inner diameter of the third pipe section 1233 is ID3, and the inner diameter of the fourth pipe section 1234 is ID4. Combining Figure 4 - Figure 5 , ID2 < ID3 < ID1 < ID4.

[0085] The outer diameter of the first inserted section 1131 is OD1, the outer diameter of the second inserted section 1132 is OD2, and the outer diameter of the third inserted section 1133 is OD3. Combining Figure 4 , OD1 < OD2 < OD3.

[0086] Since the outer diameter OD2 of the second inserted section 1132 is smaller than the inner diameter ID4 of the fourth pipe section 1234, when the inner pipe 113 is screwed into the outer pipe 123, a circular space, i.e., the first accommodation groove 160, will be naturally formed between the outer peripheral surface of the second inserted section 1132 and the inner peripheral surface of the fourth pipe section 1234. This first accommodation groove 160 provides a stable position for the installation of the first seal 150.

[0087] Specifically, as Figure 5 shown, when the first seal 150 is placed in the first accommodation groove 160, its multiple surfaces are in close contact with the surrounding components. This all-round contact greatly improves the sealing performance of the explosion-proof valve 100.

[0088] First, the inner and outer sides of the first seal 150 are in close contact with the outer peripheral surface of the second inserted section 1132 and the inner peripheral surface of the fourth pipe section 1234 respectively. This contact not only prevents the direct passage of gas and liquid through physical contact but also uses the elastic deformation ability of the first seal 150 to further compress the sealing surface under pressure, forming a more reliable sealing barrier.

[0089] Second, the upper and lower sides of the first seal 150 are also in close contact with the end of the first pipe section 1231 and the end of the third inserted section 1133 respectively. This design ensures that the seal is effectively fixed and supported in the entire axial direction, preventing displacement or loosening caused by vibration or impact. At the same time, this upper and lower side contact further enhances the sealing effect, making it more difficult for gas and liquid to leak from the connection.

[0090] As Figure 3 shown, according to some embodiments of the present utility model, the explosion-proof valve 100, the valve core 140 includes: a waterproof and breathable membrane 141.

[0091] The waterproof and breathable membrane 141 can effectively prevent liquid leakage. This is because the material of the waterproof and breathable membrane 141 has excellent waterproof performance, which can effectively block the outflow of liquid or prevent external liquid from flowing into the battery pack 1000. In addition to waterproofing, the waterproof and breathable membrane 141 has breathable performance. It can allow gas molecules to pass through freely, realizing the gas exchange between the inside and outside of the explosion-proof valve 100, so as to maintain the balance of the internal air pressure. This dynamic balance helps to prevent the pressure increase caused by the accumulation of internal gas, thereby reducing the explosion risk. By setting the waterproof and breathable membrane 141, both the waterproof performance of the explosion-proof valve 100 and its breathable function are ensured, providing comprehensive protection for the explosion-proof valve 100 and improving its safety and reliability.

[0092] The valve core 140 further includes: a thimble 142, and the thimble 142 is arranged on the side of the waterproof and breathable membrane 141 facing the cover plate 121 to pierce the waterproof and breathable membrane 141 after the waterproof and breathable membrane 141 bulges.

[0093] Under normal circumstances, the waterproof and breathable membrane 141 can maintain the gas exchange between the inside and outside while preventing liquid penetration. However, in some extreme cases, such as when a violent reaction occurs inside the battery pack 1000 resulting in a sharp increase in air pressure, the waterproof and breathable membrane 141 may not be able to release the pressure in time. At this time, the thimble 142 plays an important role. As the waterproof and breathable membrane 141 bulges, the thimble 142 will gradually approach and finally pierce the membrane body, thus quickly releasing the internal pressure. This process is automatic and rapid, and can cope with emergencies without external intervention, effectively avoiding the occurrence of explosion accidents.

[0094] In some embodiments not shown in the figures, the explosion-proof valve 100 is provided with a marking section, and the marking section extends along the axis of the explosion-proof valve 100. A part of the marking section is located on the surface of the cover body 120, and another part of the marking section is located on the surface of the base 110.

[0095] These marking sections form a visual alignment reference. When installing the cover body 120, as the cover body 120 is gradually tightened onto the base 110, these two marking sections will move relative to each other until they reach a certain specific alignment state or positional relationship.

[0096] When the two marking sections are completely aligned, or one marking section is exactly within a preset range of the other marking section, this is regarded as a clear signal indicating that the current torque has reached the preset standard value. Such a setting enables the operator to intuitively judge whether the cover body 120 has been correctly and properly tightened, effectively avoiding problems such as poor sealing caused by insufficient torque or damage caused by excessive torque, thus simplifying the installation of the explosion-proof valve 100.

[0097] Such as Figure 1As shown in the figure, the second aspect of the present utility model aims to propose a battery pack 1000, which includes an explosion-proof valve 100 and a housing 200. An opening 210 is provided on the housing 200, the explosion-proof valve 100 is installed at the opening 210, and a base 110 is installed on the housing 200. The explosion-proof valve 100 adopts the explosion-proof valve 100 of the first aspect embodiment in the present utility model.

[0098] The interior of the housing 200 of the battery pack 1000 is used to accommodate and protect core components such as internal battery cells and electrical components. An opening 210 is provided on the housing 200, which is specifically opened for installing the explosion-proof valve 100 to ensure that the explosion-proof valve 100 can work properly and be connected to the interior of the battery pack 1000.

[0099] The base 110 of the explosion-proof valve 100 is installed on the housing 200 and is used to support and fix the explosion-proof valve 100, so as to ensure that the explosion-proof valve 100 can be stably installed at the opening 210 of the housing 200 and avoid loosening or falling off caused by vibration or impact.

[0100] Specifically, when the power battery works under complex working conditions for a long time, the heat generation, cooling process of the internal battery cells and the changes in the external environment will all cause the pressure imbalance inside and outside the battery pack. The waterproof and breathable membrane 141 installed on the explosion-proof valve 100 plays a role in ventilation. It allows gas molecules to pass through, which helps to ensure the safety and stability of the battery pack during normal operation.

[0101] Once an abnormality occurs inside the battery pack 1000, such as a short circuit, overcharge or over-discharge of the battery cell, etc., it may cause a sharp increase in the internal air pressure. At this time, the waterproof and breathable membrane 141 will be squeezed and bulge, and then approach the thimble 142. The thimble 142 will quickly pierce the waterproof and breathable membrane 141 to form a larger gas release channel, so that the internal high-pressure gas can be quickly discharged, thus avoiding the explosion of the battery pack 1000 due to excessive internal pressure.

[0102] By setting the explosion-proof valve 100 of the first aspect embodiment in the present utility model, not only provides key safety protection for the battery pack 1000, but also improves the flexibility of maintenance.

[0103] Specifically, when the explosion-proof valve 100 or the waterproof and breathable membrane 141 therein is damaged due to long-term use, accidental impact or other reasons, this design allows for convenient disassembly and repair operations.

[0104] In some embodiments, a substrate 111 is located inside the housing 200, and a ring-shaped second accommodation groove 230 is defined between the substrate 111 and the housing 200. The explosion-proof valve 100 further includes a second seal 170, and the second seal 170 is located in the second accommodation groove 230.

[0105] The second seal 170 is in close contact with the corresponding surfaces of the substrate 111 and the housing 200 respectively. This installation method ensures that the second seal 170 can fully play its sealing role, effectively preventing the liquid (such as electrolyte) inside the battery pack 1000 from leaking into the external environment through the tiny gap between the substrate 111 and the housing 200.

[0106] Through the mutual cooperation of the second seal 170 and the first seal 150, a multi-layer sealing protection system is formed, improving the sealing performance of the battery pack 1000.

[0107] In some alternative embodiments, the first seal 150 and the second seal 170 are made of elastic and corrosion-resistant material parts, such as rubber parts or silicone rubber parts. These material parts can undergo elastic deformation when subjected to pressure, thus fitting more closely to the surfaces of the substrate 111 and the housing 200 to form a more reliable sealing barrier.

[0108] In some alternative embodiments, the housing 200 is provided with a connection hole 220, and the substrate 111 is provided with a mounting hole 1112 corresponding to the connection hole 220. The mounting hole 1112 is a blind hole.

[0109] This blind hole design not only ensures the strength of the substrate 111, preventing it from being damaged due to excessive force during installation, but also provides additional sealing protection, preventing gas or liquid from infiltrating or overflowing into the valve cavity 130 through the mounting hole 1112.

[0110] When the explosion-proof valve 100 needs to be installed, fasteners such as bolts and screws can pass through the connection hole 220 of the housing 200 and be screwed into the mounting hole 1112 of the substrate 111 to achieve a firm connection between the explosion-proof valve 100 and the housing 200. This connection method is simple and reliable, ensuring both the stability of the explosion-proof valve 100 and facilitating subsequent disassembly and maintenance. At the same time, the mounting hole 1112 with a blind hole design also improves the overall sealing performance of the explosion-proof valve 100, ensuring its safe and stable operation under various working conditions.

[0111] Combined Figure 2 , the second seal 170 is annular, and the second seal 170 is provided with a through hole corresponding to the connection hole 220, so that fasteners such as bolts and screws can pass through the second seal 170.

[0112] The purpose of the third aspect of the present utility model is to propose a vehicle, including a battery pack 1000. The battery pack 1000 adopts the battery pack 1000 in the embodiment of the second aspect of the present utility model.

[0113] The vehicle in the present utility model uses the battery pack 1000 in the embodiment of the second aspect as its power source, thereby achieving a double improvement in vehicle performance and safety.

[0114] In some alternative embodiments, the explosion-proof valve 100 is located on the vertical wall of the rear border of the battery pack 1000 housing, and the air outlet 124 on the explosion-proof valve 100 faces the rear of the vehicle. At the same time, a certain distance is ensured between the air outlet 124 and the chassis components.

[0115] Specifically, the air outlet 124 of the explosion-proof valve 100 is precisely set to face the rear of the vehicle. The advantage of this is that when the battery pack 1000 undergoes thermal runaway and the internal pressure rises sharply, the high-temperature and high-pressure gas can be quickly and safely released through the air outlet 124 and flow towards the rear of the vehicle along the preset channel. More critically, by ensuring a sufficient spacing distance between the air outlet 124 and the vehicle chassis components, an unobstructed channel for gas pressure relief is provided, effectively avoiding the risks that may be brought about by the obstruction or change of the airflow direction.

[0116] In addition, the setting position of the air outlet 124 of the explosion-proof valve 100 can also reduce the possibility of the thermal runaway gas directly impacting the cockpit or the left and right sides of the vehicle, thereby maximizing the protection of the safety of the driver, passengers and pedestrians.

[0117] The following refers to Figure 1 - Figure 5 An explosion-proof valve 100 according to an embodiment of the present invention will be described in detail with reference to a specific embodiment. It should be understood that the following description is only an exemplary illustration and not a specific limitation of the utility model.

[0118] Referring to Figure 1 , the battery pack 1000 includes: an explosion-proof valve 100 and a housing 200.

[0119] Referring to Figure 1 , the housing 200 includes: an opening 210 and a connection hole 220. The explosion-proof valve 100 is installed at the opening 210.

[0120] Referring to Figure 2 , the explosion-proof valve 100 includes: a base 110, a cover 120, a valve cavity 130, a valve core 140, a first seal 150, a first receiving groove 160, and a second seal 170.

[0121] Referring to Figure 3 , the base 110 includes: a base plate 111 and a first connecting pipe 112. The first connecting pipe 112 is connected to the base plate 111.

[0122] The base plate 111 includes: an air inlet 1111 and a mounting hole 1112.

[0123] The base 110 is installed on the housing 200. The mounting hole 1112 on the base plate 111 corresponds to the position of the connection hole 220, and the mounting hole 1112 is a blind hole.

[0124] The substrate 111 is located inside the housing 200, and an annular second accommodation groove 230 is defined between the substrate 111 and the housing 200. The second seal 170 is located in the second accommodation groove 230.

[0125] Referring to Figure 3 , the cover 120 includes: a cover plate 121, a second connecting pipe 122 connected to the cover plate 121, and an air outlet 124.

[0126] The valve chamber 130 is jointly surrounded by the cover plate 121, the substrate 111, the first connecting pipe 112, and the second connecting pipe 122.

[0127] Referring to Figure 3 , the valve chamber 130 includes: an air inlet chamber 131 and an air outlet chamber 132.

[0128] The valve chamber 130 is connected to both the air inlet 1111 and the air outlet 124.

[0129] The valve core 140 includes: a waterproof and breathable membrane 141 and a thimble 142. The thimble 142 is disposed on the side of the waterproof and breathable membrane 141 facing the cover plate 121 to pierce the waterproof and breathable membrane 141 after the waterproof and breathable membrane 141 bulges.

[0130] The waterproof and breathable membrane 141 in the valve core 140 is in a sheet shape, and the edge of the valve core 140 is clamped between the outer connecting pipe 123 and the inner connecting pipe 113. And it is located between the air inlet 1111 and the air outlet 124.

[0131] The valve core 140 divides the valve chamber 130 into an air inlet chamber 131 communicating with the air inlet 1111 and an air outlet chamber 132 communicating with the air outlet 124.

[0132] The first connecting pipe 112 is the inner connecting pipe 113, the second connecting pipe 122 is the outer connecting pipe 123, the inner peripheral surface of the outer connecting pipe 123 has an internal thread, and the outer peripheral surface of the inner connecting pipe 113 has an external thread. The first connecting pipe 112 is screwed with the second connecting pipe 122.

[0133] Referring to Figure 3 - Figure 5 , the outer connecting pipe 123 includes: a first pipe section 1231, a second pipe section 1232, a third pipe section 1233, and a fourth pipe section 1234. The internal thread is provided on the first pipe section 1231. The second pipe section 1232 is axially connected to one end of the first pipe section 1231, and the inner diameter of the second pipe section 1232 is smaller than the inner diameter of the first pipe section 1231. The edge of the valve core 140 is clamped between the end of the second pipe section 1232 and the end of the inner connecting pipe 113.

[0134] Referring to Figure 4, the third pipe segment 1233 is connected between the first pipe segment 1231 and the second pipe segment 1232. The inner diameter of the third pipe segment 1233 is larger than the inner diameter of the first pipe segment 1231 and smaller than the inner diameter of the second pipe segment 1232. The end of the third pipe segment 1233 abuts against the end of the inner pipe 113. The thickness of the valve core 140 in the natural state is greater than or equal to the axial dimension of the third pipe segment 1233.

[0135] Refer to Figure 4 , the fourth pipe segment 1234 is connected to one end of the first pipe segment 1231 far from the second pipe segment 1232. The inner diameter of the fourth pipe segment 1234 is larger than the inner diameter of the first pipe segment 1231.

[0136] Refer to Figure 5 , the first seal 150 is arranged between the outer pipe 123 and the inner pipe 113 and is located at one end of the outer pipe 123 far from the valve core 140.

[0137] Refer to Figure 5 , the inner pipe 113 includes, arranged in sequence along the axis and with the outer diameters increasing in sequence: the first inner connection section 1131, the second inner connection section 1132, and the third inner connection section 1133. The external thread is arranged on the first inner connection section 1131.

[0138] The inner diameter of the fourth pipe segment 1234 is equal to the outer diameter of the third inner connection section 1133.

[0139] The first receiving groove 160 is between the outer peripheral surface of the second inner connection section 1132 and the inner peripheral surface of the fourth pipe segment 1234. The first seal 150 is located in the first receiving groove 160.

[0140] Other components of the explosion-proof valve 100 according to the embodiments of the present invention, such as the battery pack 1000 and the vehicle, etc., and the operations are known to those of ordinary skill in the art and will not be described in detail here.

[0141] In the description of this specification, the descriptions referring to terms such as "embodiment", "example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0142] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and deformations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An explosion-proof valve, characterized in that, Comprising: A base, the base includes a substrate and a connected first connecting pipe, and an air inlet is provided on the substrate; A cover body, the cover body includes a cover plate and a connected second connecting pipe, the second connecting pipe is screwed with the first connecting pipe, an air outlet is provided on the cover body, and the cover plate, the substrate, the first connecting pipe, and the second connecting pipe enclose a valve cavity, and the valve cavity is connected to both the air inlet and the air outlet; A valve core, the valve core is arranged in the valve cavity and is located between the air inlet and the air outlet, and the valve core divides the valve cavity into an air inlet cavity communicating with the air inlet and an air outlet cavity communicating with the air outlet.

2. The explosion-proof valve according to claim 1, wherein One of the first connecting pipe and the second connecting pipe is an external connecting pipe and the other is an internal connecting pipe, the inner peripheral surface of the external connecting pipe has an internal thread, and the outer peripheral surface of the internal connecting pipe has an external thread; The valve core is sheet-shaped, and the edge of the valve core is clamped between the external connecting pipe and the internal connecting pipe.

3. The explosion-proof valve according to claim 2, characterized in that, The external connecting pipe includes: A first pipe section, the internal thread is provided on the first pipe section and cooperates with the internal connecting pipe; A second pipe section, the second pipe section is axially connected to one end of the first pipe section, the inner diameter of the second pipe section is smaller than the inner diameter of the first pipe section, and the edge of the valve core is clamped between the end of the second pipe section and the end of the internal connecting pipe.

4. The explosion-proof valve according to claim 3, characterized in that The external connecting pipe further includes: A third pipe section, the third pipe section is connected between the first pipe section and the second pipe section, the inner diameter of the third pipe section is larger than the inner diameter of the first pipe section and smaller than the inner diameter of the second pipe section, and the end of the third pipe section abuts against the end of the internal connecting pipe; The thickness of the valve core in the natural state is greater than or equal to the axial dimension of the third pipe section.

5. The explosion-proof valve according to claim 3, characterized in that, Further comprising: A first sealing member provided between the external connecting pipe and the internal connecting pipe, and the first sealing member is located at one end of the external connecting pipe away from the valve core.

6. The explosion-proof valve according to claim 5, characterized in that, The external connecting pipe further includes: A fourth pipe section, the fourth pipe section is connected to one end of the first pipe section away from the second pipe section, and the inner diameter of the fourth pipe section is larger than the inner diameter of the first pipe section; The internal connecting pipe includes, arranged axially in sequence and with the outer diameters increasing in sequence: a first internal connection section, a second internal connection section, and a third internal connection section, and the external thread is provided on the first internal connection section; The inner diameter of the fourth pipe section is equal to the outer diameter of the third internal connection section, and a first accommodation groove is defined between the outer peripheral surface of the second internal connection section and the inner peripheral surface of the fourth pipe section, and the first sealing member is located in the first accommodation groove.

7. The explosion-proof valve according to any one of claims 1-6, characterized in that, The valve core includes: a waterproof and breathable membrane; The valve core further includes: a thimble, the thimble is arranged on the side of the waterproof and breathable membrane facing the cover plate to pierce the waterproof and breathable membrane after the waterproof and breathable membrane bulges.

8. A battery pack, characterized in that, Comprising: The explosion-proof valve according to any one of claims 1-7; A housing, an opening is provided on the housing, the explosion-proof valve is installed at the opening, and the base is installed on the housing.

9. The battery pack according to claim 8, characterized in that, The substrate is located inside the housing, and an annular second accommodation groove is defined between the substrate and the housing; The explosion-proof valve further includes a second sealing member, and the second sealing member is located in the second accommodation groove.

10. A vehicle, characterized in that, A battery pack according to any one of claims 8-9.

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