Anti-explosion valve, battery box and battery

Abstract

The utility model provides an anti-explosion valve, a battery box and a battery, and relates to the technical field of batteries. The anti-explosion valve comprises a valve body and an exhaust pipe, wherein the valve body is provided with an air inlet end and an exhaust end; the exhaust pipe comprises a first pipe, a second pipe and a third pipe which are sequentially communicated, the valve body is sleeved with the first pipe, the second pipe is a conical pipe, the small-diameter end of the conical pipe is connected with one end of the first pipe, the exhaust end of the conical pipe extends into the conical pipe, the large-diameter end of the conical pipe is connected with one end of the third pipe, and the other end of the third pipe extends in the direction away from the valve body. According to the explosion-proof valve, by arranging the exhaust pipe, when high-temperature and high-pressure gas in the battery pack is exhausted through the valve body, the high-temperature and high-pressure gas is guided by the exhaust pipe and then is exhausted into the external environment, so that the gas injection direction is controllable when the explosion-proof valve exhausts, and the explosion-proof valve can exhaust away from surrounding parts; and therefore, high-temperature and high-pressure gas exhausted by the anti-explosion valve can be effectively prevented from influencing other parts.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to an explosion-proof valve, a battery box and a battery. Background Art

[0002] A battery pack (abbreviated as PACK) is a key energy storage unit in applications such as electric vehicles and energy storage systems. The composition structure of the battery pack mainly includes a battery box and battery cells, a battery management system and a cooling system arranged in the battery box. Among them, in order to reduce the risk of explosion caused by the increase of internal pressure in the battery pack in case of abnormal conditions, the battery pack is also equipped with an explosion-proof valve. The explosion-proof valve is arranged on the outer wall of the battery box, and it is an important safety component in the battery pack. When abnormal conditions such as thermal runaway occur in the battery pack and high-temperature and high-pressure gas is generated, the high-temperature and high-pressure gas pushes open the valve cover of the explosion-proof valve, increasing the gap between the valve cover and the valve body to form a gas discharge channel, so that the high-temperature and high-pressure gas and combustibles can be ejected out from the exhaust channel, thereby releasing the internal pressure of the battery pack and reducing the risk of explosion of the battery pack.

[0003] Since the ejection direction of the gas during the exhaust of the explosion-proof valve is not restricted, the high-temperature and high-pressure gas and combustibles will be ejected onto the wiring harness, causing damage, short circuit or even combustion of the wiring harness. Moreover, the ejected high-temperature and high-pressure gas and combustibles will cause the temperature in the cabinet where the battery pack is installed to rise rapidly, resulting in thermal runaway and damage to adjacent battery packs and other components, and easily further triggering the overall thermal runaway and combustion explosion of the cabinet. Summary of the Utility Model

[0004] Embodiments of the present application provide an explosion-proof valve, a battery box and a battery, which can improve the controllability of the ejection direction of the gas during the exhaust of the explosion-proof valve.

[0005] In a first aspect, an explosion-proof valve provided by an embodiment of the present application includes a valve body and an exhaust pipe. The valve body has an air inlet end and an exhaust end; the exhaust pipe includes a first pipe, a second pipe and a third pipe that are connected in sequence. The first pipe is sleeved on the valve body. The second pipe is a conical pipe. The small-diameter end of the conical pipe is connected to one end of the first pipe, and the exhaust end extends into the conical pipe. The large-diameter end of the conical pipe is connected to one end of the third pipe, and the other end of the third pipe extends away from the valve body.

[0006] In an embodiment, an outwardly turned edge is provided at one end of the first pipe away from the second pipe. The valve body is configured to be installed on the box wall of the battery box, and the outwardly turned edge is configured to abut against the box wall of the battery box.

[0007] In an embodiment, the outwardly turned edge extends circumferentially along the first pipe to form a ring.

[0008] In an embodiment, the first pipe is snap-connected to the valve body.

[0009] In one embodiment, a clamping groove is provided on the valve body, and a buckle is provided on the inner wall of the first pipe. One end of the buckle close to the air inlet end is connected to the pipe wall of the first pipe, and the other end is engaged with the clamping groove.

[0010] In one embodiment, the clamping groove extends circumferentially along the first pipe to form an annular groove, and there are multiple buckles. One ends of the multiple buckles away from the pipe wall of the first pipe are all located in the clamping groove.

[0011] In one embodiment, a first through hole is provided on the pipe wall of the first pipe, and the first through hole is correspondingly arranged with the buckle along the radial direction of the first pipe.

[0012] In one embodiment, the third pipe is a bent pipe. One end of the bent pipe is connected to the large-diameter end of the second pipe, and the other end extends away from the valve body.

[0013] In one embodiment, the valve body includes a valve body, a valve core and a valve cover; in the direction from the air inlet end to the exhaust end, the valve body is provided with an exhaust through hole; the valve core is inserted through the valve body in the direction from the air inlet end to the exhaust end and is elastically abutted against the valve body through an elastic member; the valve cover is connected to one end of the valve core close to the exhaust end, and when the valve cover contacts the valve body, the valve cover closes the exhaust through hole. When the valve cover is spaced from the valve body, the exhaust through hole is communicated with the exhaust pipe through the gap between the valve cover and the valve body; wherein, one end of the exhaust through hole close to the valve cover is the exhaust end, and the other end is the air inlet end.

[0014] In one embodiment, the valve body further includes a spring nut and a guide cylinder. The nut is connected to one end of the valve core away from the valve cover. Two ends of the elastic member are respectively abutted against the nut and the valve body. The guide cylinder is sleeved on one end of the valve core away from the valve cover and the nut and is connected to the valve body.

[0015] In a second aspect, an embodiment of the present application provides a battery box, which includes a box body and the aforementioned explosion-proof valve; the box body has an installation cavity; the valve body is arranged on the box wall of the box body, and the air inlet end is communicated with the installation cavity.

[0016] In a third aspect, an embodiment of the present application provides a battery, which includes a battery module and the aforementioned battery box, and the battery module is arranged in the installation cavity.

[0017] Advantages of the embodiments of the present application:

[0018] In the embodiments of the present application, by providing an exhaust pipe, when the high-temperature and high-pressure gas inside the battery pack is exhausted through the valve body, the high-temperature and high-pressure gas is guided by the exhaust pipe and then discharged into the external environment, so that the gas ejection direction during the exhaust of the explosion-proof valve is controllable, so that the explosion-proof valve can exhaust away from the surrounding components, and thus the high-temperature and high-pressure gas discharged by the explosion-proof valve can be effectively prevented from affecting other components. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of an explosion-proof valve provided by an embodiment of the present application;

[0021] Figure 2 It is a schematic longitudinal sectional view of an explosion-proof valve provided by an embodiment of the present application;

[0022] Figure 3 is Figure 2 an enlarged view of part A in

[0023] Figure 4 It is a schematic partial structural diagram of an exhaust pipe provided by an embodiment of the present application;

[0024] Figure 5 It is a schematic structural diagram of a card slot provided by an embodiment of the present application;

[0025] Figure 6 It is a schematic structural diagram of the explosion-proof valve when it is open provided by an embodiment of the present application;

[0026] Figure 7 It is a schematic structural diagram of a battery box provided by an embodiment of the present application;

[0027] Figure 8 It is an installation schematic diagram of an explosion-proof valve provided by an embodiment of the present application.

[0028] Explanation of reference numerals:

[0029] 001 - Explosion-proof valve;

[0030] 011 - Valve body; 111 - Intake end; 112 - Exhaust end; 113 - Card slot; 114 - Valve body; 1141 - Exhaust through hole; 1142 - First sealing ring installation groove; 1143 - First sealing ring; 1144 - Second sealing ring installation groove; 115 - Valve core; 116 - Valve cover; 117 - Elastic member; 118 - Nut; 119 - Guide cylinder;

[0031] 012 - Exhaust pipe; 121 - First pipe; 1211 - First through hole; 122 - Second pipe; 123 - Third pipe; 124 - Flanged edge; 125 - Buckle;

[0032] 002 - Battery box; 021 - Battery box; 212 - Second through hole; 213 - Box wall; 022 - Screw; 023 - Second sealing ring. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0034] In addition, it should be understood that the specific embodiments described herein are only for explaining and illustrating the present application, and are not used to limit the present application. In the present application, "inside" and "outside" refer to the outline of the device.

[0035] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0036] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" 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 directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, explanations, or descriptions. Any embodiment or design described as "for example" or "for instance" in the embodiments of the present application is not construed as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0038] To facilitate understanding of the solution of the present application, the spline curves and arrows used in the reference numerals in the accompanying drawings are described herein: For the components indicated by the spline curves without arrows, they are solid components, that is, components with a solid structure; for the components indicated by the spline curves with arrows, they are virtual components, that is, components without a solid structure.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic structural diagram of the explosion-proof valve 001 provided by the embodiment of the present application, Figure 2FIG. 0 is a schematic longitudinal sectional view of the explosion-proof valve 001 provided by an embodiment of the present application. An embodiment of the present application provides an explosion-proof valve 001. The explosion-proof valve 001 can be applied to many scenarios that require pressure relief. In this embodiment, the explosion-proof valve 001 applied to a battery will be described in detail. Specifically, the explosion-proof valve 001 includes a valve body 011 and an exhaust pipe 012. The valve body 011 has an air inlet end 111 and an exhaust end 112. The exhaust pipe 012 includes a first pipe 121, a second pipe 122, and a third pipe 123 that are connected in sequence. The first pipe 121 is sleeved on the valve body 011. The second pipe 122 is a tapered pipe. The small-diameter end of the tapered pipe is connected to one end of the first pipe 121, and the exhaust end 112 extends into the tapered pipe. The large-diameter end of the tapered pipe is connected to one end of the third pipe 123. The other end of the third pipe 123 extends away from the valve body 011.

[0040] It can be understood that the air inlet end 111 is the end for introducing air into the valve body 011, and the exhaust end 112 is the end for discharging the gas inside the valve body 011 to the outside.

[0041] It can be understood that the first pipe 121 is a pipe body with a constant diameter, which can be in clearance fit or interference fit with the valve body 011. The diameter of the small-diameter end of the tapered pipe is the same as the diameter of the first pipe 121. The diameter of the third pipe 123 is the same as the diameter of the large-diameter end of the tapered pipe.

[0042] Among them, the first pipe 121 can be threadedly connected, clamped, welded, or glued to the valve body 011.

[0043] Optionally, the exhaust pipe 012 is a metal pipe.

[0044] In this embodiment, by providing the exhaust pipe 012, when the high-temperature and high-pressure gas inside the battery pack exhausts through the valve body 011, the exhaust pipe 012 guides the high-temperature and high-pressure gas and then discharges it to the external environment, so that the gas jet direction during the exhaust of the explosion-proof valve 001 is controllable, so that the explosion-proof valve 001 can exhaust away from the surrounding components, and thus the high-temperature and high-pressure gas discharged by the explosion-proof valve 001 can be effectively prevented from affecting other components. In this way, the service life of the battery pack can be improved.

[0045] In addition, by arranging the first pipe 121 to cooperate with the valve body 011 and connecting the first pipe 121 and the second pipe 122 with the second pipe 122 configured as a tapered pipe, on the one hand, the fitting accuracy between the exhaust pipe 012 and the valve body 011 can be improved through the first pipe 121 to enhance the structural reliability of the overall explosion-proof valve 001; on the other hand, the pipe diameter of the exhaust pipe 012 for exhaust can be increased through the large-diameter end of the tapered pipe, so that after the high-temperature and high-pressure gas is discharged from the exhaust end 112, it can enter a larger exhaust space, thereby reducing the impact force of the high-temperature and high-pressure gas. In this way, the stress state of the exhaust pipe 012 can be improved, and the reliability of the connection between the exhaust pipe 012 and the valve body 011 can be enhanced.

[0046] Moreover, the first pipe 121 transitions to the third pipe 123 through a tapered pipe. The setting of the tapered pipe can improve the smooth transition from the first pipe 121 to the third pipe 123, thereby reducing the resistance when the high-temperature and high-pressure gas flows and improving the exhaust efficiency.

[0047] Please refer to Figure 3 , Figure 3 which Figure 2 is an enlarged view of part A in

[0048] . In one embodiment, an outward flange 124 is provided at one end of the first pipe 121 away from the second pipe 122. The valve body 011 is configured to be mounted on the box wall 213 of the battery box 002. The outward flange 124 is configured to abut against the box wall 213 of the battery box 002.

[0049] It can be understood that the flange is integrally formed with the first pipe 121.

[0050] In this embodiment, by providing the outward flange 124, the contact area between the exhaust pipe 012 and the battery box 002 can be increased. In this way, on the one hand, the position stability of the exhaust pipe 012 can be improved, and the vibration of the exhaust pipe 012 relative to the battery box 002 caused by vibration or pressure change can be reduced. On the other hand, the outward flange 124 provides an additional support part for the exhaust pipe 012, which helps to enhance the vibration resistance of the exhaust pipe 012 when discharging high-temperature and high-pressure gas, so that it can stably guide the gas.

[0051] Please refer to Figure 4 , Figure 4 which is a partial structural schematic diagram of the exhaust pipe 012 provided by the embodiment of the present application. In one embodiment, the outward flange 124 extends circumferentially along the first pipe 121 to form a ring.

[0052] In this embodiment, by extending the turned-out edge 124 circumferentially along the first pipe 121 to form a ring, the contact area between the exhaust pipe 012 and the battery box 002 can be further increased, so as to improve the position stability, anti-vibration performance, etc. of the exhaust pipe 012.

[0053] Please refer to Figure 2 , in one embodiment, the first pipe 121 is snap-connected to the valve body 011.

[0054] It can be understood that a snap 125 can be provided on the first pipe 121, and a slot 113 can be provided on the valve body 011. The slot 113 cooperates with the snap 125 to achieve the snap connection between the first pipe 121 and the valve body 011; it can also be that a slot 113 is provided on the first pipe 121, and a snap 125 is provided on the valve body 011. The slot 113 cooperates with the snap 125 to achieve the snap connection between the first pipe 121 and the valve body 011.

[0055] In this embodiment, by snap-connecting the first pipe 121 to the valve body 011, the convenience of assembling the exhaust pipe 012 to the valve body 011 can be improved, thereby improving the assembly efficiency.

[0056] Please refer to Figures 3 to 5 , Figure 5 is a schematic structural view of the slot 113 provided by the embodiment of the present application; in one embodiment, a slot 113 is provided on the valve body 011. As Figure 4 shown, a snap 125 is provided on the inner wall of the first pipe 121. As Figure 4 shown, one end of the snap 125 close to the air inlet end 111 is connected to the pipe wall of the first pipe 121, and the other end cooperates with the slot 113. As Figure 3 shown.

[0057] It can be understood that the connection part between the snap 125 and the first pipe 121 has elasticity.

[0058] When inserting the first pipe 121 into the valve body 011, first sleeve the end of the first pipe 121 far from the second pipe 122 on the valve body 011, and then push the first pipe 121 towards the air inlet end 111. When the snap 125 abuts against the valve body 011, increase the thrust so that one end of the snap 125 far from the pipe wall of the first pipe 121 is pushed by the valve body 011 and moves towards the pipe wall of the first pipe 121. Until the snap 125 moves to a position opposite to the slot 113, the snap 125 returns to its original state and inserts into the slot 113 to cooperate with the slot 113.

[0059] In this embodiment, the snap 125 and the slot 113 are provided to cooperate to achieve the snap connection between the first pipe 121 and the valve body 011. This not only makes the snap connection structure simple and easy to operate, but also improves the reliability of the connection between the exhaust pipe 012 and the valve body 011, and avoids the detachment of the exhaust pipe 012.

[0060] Please refer to Figure 4 and Figure 5 , in one embodiment, the slot 113 extends circumferentially along the first pipe 121 as an annular groove, as Figure 5 shown. There are multiple snaps 125, as Figure 4 shown. One end of each of the multiple snaps 125 away from the pipe wall of the first pipe 121 is located in the slot 113.

[0061] In this embodiment, by setting the slot 113 as an annular groove, after the exhaust pipe 012 is installed, the exhaust pipe 012 can be rotated so that the exhaust port of the exhaust pipe 012 faces a specific direction. In this way, the adjustability of the exhaust direction of the exhaust pipe 012 can be improved to adapt to different types of battery packs.

[0062] Please refer to Figure 4 In one embodiment, a first through hole 1211 is provided on the pipe wall of the first pipe 121. Along the radial direction of the first pipe 121, the first through hole 1211 is correspondingly arranged with the snap 125.

[0063] Among them, the snap 125 can be integrally formed with the first pipe 121. Specifically, a U-shaped groove is cut on the pipe wall of the first pipe 121, and the part of the pipe wall of the first pipe 121 located in the U-shaped groove is bent toward the slot 113, and then the snap 125 can be formed. And the space occupied by the U-shaped groove combined with the material originally forming the snap 125 can form the first through hole 1211.

[0064] In this embodiment, by providing the first through hole 1211, on the one hand, it is convenient to observe the cooperation between the snap 125 and the slot 113 through the first through hole 1211 to ensure that the snap 125 is installed in place; on the other hand, relevant tools can pass through the first through hole 1211 to pull or pry the snap 125 so that the snap 125 is disengaged from the slot 113, so that the exhaust pipe 012 can be disassembled from the valve body 011 for easy maintenance.

[0065] Please refer to Figure 1 , in one embodiment, the third pipe 123 is a bent pipe. One end of the bent pipe is connected to the large-diameter end of the second pipe 122, and the other end extends away from the valve body 011.

[0066] Exemplarily, the bent pipe is an L-shaped pipe, an S-shaped pipe or a special-shaped pipe. Specifically, the bent pipe is an L-shaped pipe.

[0067] The third pipe 123 is set as a bent pipe, which can not only make the gas discharged from the explosion-proof valve away from the relevant electrical components, but also control the size of the exhaust pipe 012 in the axial direction of the valve body 011, so as to facilitate controlling the size of the battery pack in this direction and thus facilitate the layout of the battery pack.

[0068] Please refer to Figure 2 , in an embodiment, the valve body 011 includes a valve body 114, a valve core 115 and a valve cover 116. In the direction from the air inlet end 111 to the exhaust end 112, the valve body 114 is provided with an exhaust through hole 1141. The valve core 115 is disposed on the valve body 114 in the direction from the air inlet end 111 to the exhaust end 112 and is elastically abutted against the valve body 114 through an elastic member 117. The valve cover 116 is connected to one end of the valve core 115 close to the exhaust end 112, and when the valve cover 116 contacts the valve body 114, the valve cover 116 closes the exhaust through hole 1141, as Figure 2 shown. When the valve cover 116 and the valve body 114 are spaced apart, the exhaust through hole 1141 communicates with the exhaust pipe 012 through the gap between the valve cover 116 and the valve body 114, as Figure 6 shown, Figure 6 is a schematic structural diagram of the explosion-proof valve 001 provided by the embodiment of the present application when it is open. Among them, one end of the exhaust through hole 1141 close to the valve cover 116 is the exhaust end 112, and the other end is the air inlet end 111.

[0069] Among them, the elastic member 117 is a cylindrical helical spring, which is sleeved on the valve core 115.

[0070] The clamping groove 113 is disposed on the outer periphery of the valve body 114.

[0071] In addition, the first pipe 121 is sleeved on the outer periphery of the valve body 114.

[0072] When the valve cover 116 closes the exhaust through hole 1141, the elastic member 117 is in a compressed state, with both ends tightly abutting the valve cover 116 and the valve body 114, so that the valve cover 116 stably closes the exhaust through hole 1141; when the internal pressure of the battery pack increases and the thrust acting on the valve cover 116 through the exhaust through hole 1141 drives the valve cover 116 to move away from the valve body 114, the elastic member 117 is further compressed. At this time, the exhaust through hole 1141 communicates with the exhaust pipe 012 through the gap between the valve cover 116 and the valve body 114.

[0073] It can be understood that elastic members 117 with different elastic coefficients are configured according to the pressure relief ranges of different battery packs.

[0074] In addition, in order to improve the sealing property of the valve cover 116 to the exhaust through-hole 1141, an annular first sealing ring mounting groove 1142 is provided on the valve body 114, and a first sealing ring 1143 is provided in the first sealing ring mounting groove 1142. Optionally, the first sealing ring 1143 is an O-ring. The exhaust through-hole 1141 is located on the inner peripheral side of the first sealing ring 1143. When the valve cover 116 closes the exhaust through-hole 1141, the valve cover 116 abuts against the first sealing ring 1143.

[0075] In this embodiment, by adopting the valve body 011 with the above structure, the overall structure of the pressure relief valve is simple, easy to manufacture, the manufacturing cost can be controlled, and the manufacturing efficiency can be improved.

[0076] Please refer to Figure 2 , in an embodiment, the valve body 011 further includes a nut 118 and a guide cylinder 119. The nut 118 is connected to the end of the valve core 115 away from the valve cover 116. Two ends of the elastic member 117 respectively abut against the nut 118 and the valve body 114. The guide cylinder 119 is sleeved on the end of the valve core 115 away from the valve cover 116 and the nut 118, and is connected to the valve body 114.

[0077] In this embodiment, by providing the guide cylinder 119, the movement of the valve core 115 can be limited, so that it moves along the axis of the guide cylinder 119, thereby improving the smoothness of the explosion-proof valve 001 being opened. Thus, the reliability of the explosion-proof valve 001 can be improved.

[0078] In addition, the nut 118 is threadedly connected to the valve core 115. It can not only abut the elastic member 117 against the valve core 115, but also be detached from the valve core 115, improving the convenience of maintenance.

[0079] Please refer to Figure 7 , Figure 7 is a schematic structural diagram of the battery box 002 provided by the embodiment of the present application. Correspondingly, the embodiment of the present application provides a battery box 002. The battery box 002 includes a box body 021 and the aforementioned explosion-proof valve 001. The box body 021 has an installation cavity. The valve body 011 is disposed on the box wall of the box body 021, and the air inlet end 111 communicates with the installation cavity.

[0080] Wherein, the side of the valve body 114 away from the valve cover 116 is attached to the box wall. The end of the rod portion of the screw 022 passes through the box wall and is threadedly connected to the valve body 114, and the head of the screw 022 abuts against the box wall. A second through-hole 212 that communicates the installation cavity with the exhaust through-hole 1141 is provided on the box wall. The valve core 115 passes through the second through-hole 212.

[0081] In addition, in order to improve the sealing performance between the explosion-proof valve 001 and the box wall, a ring-shaped second sealing ring installation groove 1144 is provided on the side of the valve body 114 close to the box wall, and a second sealing ring 023 is arranged in the second sealing ring installation groove 1144. As Figure 8 shown, Figure 8 is a schematic installation diagram of the explosion-proof valve 001 provided by the embodiment of the present application. Optionally, the second sealing ring 023 is a rectangular sealing ring. Both the second through hole 212 and the exhaust through hole 1141 are located inside the second sealing ring 023.

[0082] In this embodiment, by adopting the aforementioned explosion-proof valve 001, when the high-temperature and high-pressure gas inside the battery pack is exhausted through the valve body 011, the high-temperature and high-pressure gas can be guided by the exhaust pipe 012 and then discharged into the external environment, so that the gas ejection direction during the exhaust of the explosion-proof valve 001 is controllable, thereby enabling the explosion-proof valve 001 to exhaust away from the surrounding components, and further effectively avoiding the high-temperature and high-pressure gas discharged by the explosion-proof valve 001 from affecting other components. In this way, the controllability of the gas ejection direction of the battery box 002 can be improved, and thus the service life of the battery can be extended.

[0083] Correspondingly, an embodiment of the present application provides a battery, which includes a battery module and the aforementioned battery box 002. The battery module is arranged in the installation cavity.

[0084] In this embodiment, by adopting the aforementioned battery box 002, when the high-temperature and high-pressure gas inside the battery pack is exhausted through the valve body 011, the high-temperature and high-pressure gas can be guided by the exhaust pipe 012 and then discharged into the external environment, so that the gas ejection direction during the exhaust of the explosion-proof valve 001 is controllable, thereby enabling the explosion-proof valve 001 to exhaust away from the surrounding components, and further effectively avoiding the high-temperature and high-pressure gas discharged by the explosion-proof valve 001 from affecting other components. In this way, the service life of the battery can be extended.

[0085] In addition, when the battery is installed in a cabinet, an extension pipe, such as a stainless steel pipe, can be connected to the exhaust end of the exhaust pipe 012, so as to directly discharge the gas discharged by the explosion-proof valve outward, thereby reducing the influence of a thermally out-of-control battery on the surrounding batteries, and further effectively avoiding high-temperature thermal out-of-control combustion and explosion in the cabinet.

[0086] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An explosion-proof valve, characterized in that: include: A valve body having an inlet end and an exhaust end; The exhaust pipe comprises a first pipe, a second pipe and a third pipe which are connected in sequence, wherein the first pipe is sleeved on the valve body, the second pipe is a tapered pipe, the small diameter end of the tapered pipe is connected to one end of the first pipe, and the exhaust end extends into the tapered pipe, the large diameter end of the tapered pipe is connected to one end of the third pipe, and the other end of the third pipe is extended in a direction away from the valve body.

2. The explosion-proof valve according to claim 1, characterized in that: An end of the first tube away from the second tube is provided with an outer flange, the valve body is configured to be installed on the box wall of the battery box, and the outer flange is configured to abut against the box wall of the battery box.

3. The explosion-proof valve according to claim 2, characterized in that: The outward turning edge extends in a ring shape along the circumference of the first tube.

4. The explosion-proof valve according to claim 1, characterized in that: The first tube is clamped with the valve body.

5. The explosion-proof valve according to claim 4, characterized in that: The valve body is provided with a slot, the inner wall of the first tube is provided with a buckle, one end of the buckle close to the air inlet end is connected to the tube wall of the first tube, and the other end of the buckle is matched with the slot.

6. The explosion-proof valve according to claim 5, characterized in that: The clamping groove extends along the circumference of the first tube to form an annular groove. There are multiple buckles, and ends of the multiple buckles away from the tube wall of the first tube are all located in the clamping groove.

7. The explosion-proof valve according to claim 5 or 6, characterized in that: A first through hole is arranged on the tube wall of the first tube, and along the radial direction of the first tube, the first through hole is arranged corresponding to the buckle.

8. The explosion-proof valve according to any one of claims 1 to 6, characterized in that: The third pipe is a bent pipe, one end of which is connected to the large-diameter end of the second pipe, and the other end of which is extended in a direction away from the valve body.

9. The explosion-proof valve according to any one of claims 1 to 6, characterized in that: The valve body comprises: The valve body is provided with an exhaust through hole in the direction from the air inlet end to the exhaust end; A valve core is provided on the valve body in a direction from the air inlet end to the air outlet end, and is elastically abutted against the valve body through an elastic member; a valve cover connected to one end of the valve core close to the exhaust end, and when the valve cover contacts the valve body, the valve cover closes the exhaust through hole, and when the valve cover is spaced apart from the valve body, the exhaust through hole communicates with the exhaust pipe through the gap between the valve cover and the valve body; Among them, one end of the exhaust through hole close to the valve cover is the exhaust end, and the other end is the intake end.

10. The explosion-proof valve according to claim 9, characterized in that: The valve body also includes a nut and a guide cylinder. The nut is connected to one end of the valve core away from the valve cover. The two ends of the elastic member are respectively in contact with the nut and the valve body. The guide cylinder is sleeved on one end of the valve core away from the valve cover and the nut, and is connected to the valve body.

11. A battery box, characterized in that: include: The box body has a mounting cavity; And, in the explosion-proof valve as described in any one of claims 1 to 10, the valve body is arranged on the box wall of the box body, and the air inlet end is connected to the installation cavity.

12. A battery, characterized in that: include: Battery module; And, in the battery box as described in claim 11, the battery module is disposed in the installation cavity.

Images