Exhaust valve and battery cover plate assembly

Abstract

The exhaust valve comprises an inner valve body, a movable part, an outer valve body and a limiting part, the inner valve body is provided with a first opening and a second opening, and the first opening is used for being communicated with an exhaust hole of gas production equipment; the movable part is movably arranged at the second opening, partially covers the upper end face of the inner valve body and is in clearance fit with the inner valve body to form an exhaust channel. The inner valve body is sleeved with the outer valve body, and an exhaust port of the outer valve body communicates with the exhaust channel. A sealing piece and a limiting piece are arranged at the first opening of the inner valve body; the movable part and the limiting part have a first state of contact fit at the first position, and the limiting part and the sealing part are in pressing fit to enable the exhaust port to be in a sealed state; in a second state of contact fit at the second position, the limiting piece and the sealing piece are in clearance fit to enable the exhaust hole and the exhaust channel to be in a communicated state; the first position is away from the vent relative to the second position. The exhaust valve can realize automatic exhaust of gas, and ensures that liquid is not discharged during exhaust.

Description

Technical Field

[0001] The invention belongs to the technical field of secondary battery safety, and in particular relates to an exhaust valve and a battery cover assembly. Background Art

[0002] As the capacity of current secondary batteries increases, they need to face the increasingly serious problem of gas production inside them. As the amount of gas produced inside the secondary battery increases, it will gradually cause the shell of the secondary battery to swell and deform, and the internal gas pressure will be too high to cause an explosion.

[0003] In order to solve the problem of gas production inside the secondary battery, an explosion-proof valve or a pressure relief valve is generally installed on the battery cover assembly. However, the explosion-proof valve mainly plays a role when a large amount of gas is produced inside the secondary battery, and cannot solve the problems of bulging, deformation, and increased gas pressure caused by slow or small amount of gas production inside the secondary battery. The pressure relief valve will bring out part of the electrolyte while discharging the gas, which is likely to cause serious corrosion to the surrounding environment and equipment, making the battery cell unusable. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an exhaust valve, a battery cover assembly, a battery and an electrical device.

[0005] A first aspect of the present invention provides an exhaust valve, comprising: An inner valve body, wherein the inner valve body is provided with a first opening and a second opening at two ends along the axial direction, and the first opening is used to communicate with the exhaust hole of the gas production equipment; A movable member, the movable member is arranged at the second opening and moves along an axial direction perpendicular to the inner valve body, and the movable member partially covers the upper end surface of the inner valve body and cooperates with the inner valve body to form an exhaust passage; An outer valve body, the outer valve body is fixedly sleeved outside the inner valve body, the outer valve body is provided with an exhaust port, and the exhaust port is communicated with the exhaust channel; A limiter, the limiter is arranged at the first opening of the inner valve body, and a sealing member is arranged at the bottom end of the limiter at the first opening; The movable part and the limiting part have a first state of contact and cooperation at a first position and a second state of contact and cooperation at a second position, wherein along the axial direction of the inner valve body, the first position is farther away from the exhaust hole relative to the second position; and in the first state, the limiting part and the sealing part are pressed and cooperated so that the exhaust hole is in a sealed state; in the second state, the limiting part and the sealing part are clearance-fitted so that the exhaust hole and the exhaust channel are in a connected state.

[0006] In addition, the exhaust valve of the present invention may also have the following additional technical features: Preferably, the movable part includes: a shielding portion and a rod body, the shielding portion is arranged between the upper end surface of the inner valve body and the outer valve body, and covers the second opening; the rod body passes through the second opening and extends toward the bottom side of the inner valve body, and the rod body is in contact with the limit member, and the shielding portion and the rod body are both clearance-matched with the inner valve body to form the exhaust channel.

[0007] Preferably, the rod body and the stopper are provided with a first arc-shaped protrusion and a second arc-shaped protrusion on one side close to each other, respectively, and in the first state, the vertex of the first arc-shaped protrusion and the vertex of the second arc-shaped protrusion are in contact and fit; in the second state, the side of the first arc-shaped protrusion and the side of the second arc-shaped protrusion are in contact and fit; or, A first wedge-shaped head and a second wedge-shaped head are respectively provided on one side of the rod body and the limit member which are close to each other. The first wedge-shaped head and the second wedge-shaped head respectively have a first inclined surface and a second inclined surface. The first inclined surface and the second inclined surface are relatively slidably arranged. The inclination directions of the first inclined surface and the second inclined surface are the same, and the inclination directions are inclined relative to the axial direction of the inner valve body.

[0008] Preferably, the outer valve body includes a first side wall and a first top wall, the first side wall is provided with a guide hole, the shielding portion is partially provided in the guide hole, and can move in an axial direction perpendicular to the inner valve body; the first top wall is provided at the top end of the first side wall, and the exhaust port is provided on the first top wall.

[0009] Preferably, the shielding portion includes a first baffle and a second baffle that are fixedly connected, the first baffle covers the second opening, and the second baffle is movably disposed in the guide hole and can move in an axial direction perpendicular to the inner valve body; wherein, The second baffle has a third position state extending out of the guide hole and a fourth position state extending into the guide hole; in the third position state, the rod body and the limit member are in contact and cooperation at the first position; in the fourth position state, the rod body and the limit member are in contact and cooperation at the second position.

[0010] Preferably, the first baffle plate and the second baffle plate are respectively arranged in a fan shape, and an end surface of one of the two away from the other is arranged in an arc-shaped end surface.

[0011] Preferably, the exhaust valve further includes an exhaust pipe, the exhaust pipe includes a second side wall, the second side wall is slidably mounted on the first side wall, and the second baffle is switched from the third position state to the fourth position state.

[0012] Preferably, a welding portion is provided at a lower end of the first side wall close to the exhaust hole.

[0013] Preferably, a limiting groove is provided on the side wall of the rod body, an elastic member is installed in the limiting groove, and two ends of the elastic member are fixedly connected to the rod body and the inner valve body respectively.

[0014] A second aspect of the present invention provides a battery cover assembly, including a cover body, the cover body is provided with the exhaust hole, and the exhaust valve described in any embodiment of the present application is provided at the exhaust hole.

[0015] According to a third aspect of the present invention, a battery is provided, wherein the battery comprises the exhaust valve described in any embodiment of the present application, or comprises the battery cover assembly described in any embodiment of the present application.

[0016] A fourth aspect of the present invention provides an electrical device, wherein the electrical device comprises the battery described in any embodiment of the present application.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 A three-dimensional structural diagram of an exhaust valve provided in an embodiment of the present application; Figure 2 An exploded view of an exhaust valve provided in an embodiment of the present application; Figure 3 A cross-sectional view of an exhaust valve provided in an embodiment of the present application; Figure 4 A three-dimensional structural diagram of a movable part provided in an embodiment of the present application; Figure 5 for Figure 4 Provide a front view of the moving parts; Figure 6 A structural diagram of a shielding portion provided in an embodiment of the present application; Figure 7 A three-dimensional structural diagram of a position limiting member provided in an embodiment of the present application; Figure 8 for Figure 7 The front view of the provided stopper; Fig. 9 A three-dimensional structural diagram of an outer valve body provided in an embodiment of the present application; Fig.10 for Fig. 9A top view of the outer valve body is provided; Fig.11 for Fig. 9 A front view of the outer valve body is provided; Fig.12 for Fig. 9 A side view of the outer valve body is provided; Fig.13 A three-dimensional structural diagram of an inner valve body provided in an embodiment of the present application; Fig.14 for Fig.13 A front view of the inner valve body is provided; Fig.15 Another structural diagram of the coordination of the movable member and the limiting member provided in the embodiment of the present application; Fig.16 A three-dimensional structural diagram of another movable part provided in an embodiment of the present application; Fig.17 A three-dimensional structural diagram of another limiting member provided in an embodiment of the present application Fig.18 A top view of a battery cover assembly provided in an embodiment of the present application; Fig.19 A side view of a battery cover assembly provided in an embodiment of the present application; Fig. 20 for Fig.19 A partial enlarged view of the middle part; Fig.21 This is a structural diagram of the exhaust valve in a sealed state; Fig. 22 This is a structural diagram of the exhaust valve in the exhaust state.

[0019] In the above picture: 100 Exhaust valve; 110 inner valve body; 111 first opening; 112 second opening; 120 movable part; 121 shielding part; 1211 first baffle plate; 1212 second baffle plate; 1213 arc-shaped end surface; 122 rod body; 1221 first arc-shaped protrusion; 1222 limiting groove; 1223 first wedge-shaped head; 1224 first inclined surface; 1225 first vertical surface; 1226 first horizontal surface; 130 outer valve body; 131 first side wall; 1311 guide hole; 1312 welding part; 132 first top wall; 1321 exhaust port; 140: stopper; 141: second arc-shaped protrusion; 142: second wedge-shaped head; 1421: second inclined surface; 1422: second vertical surface; 1423: third inclined surface; 150 seals; 160 exhaust pipe; 161 second side wall; 162 second top wall; 170 elastic parts; 200 battery cover assembly; 210 cover body; 211 exhaust hole. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0023] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0024] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to indicate that a specific feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0026] There are two main ways to solve the problem of gas production inside secondary batteries: one is to install an explosion-proof valve on the battery cover assembly, which will rupture when the thermal runaway gas pressure inside the secondary battery reaches a certain threshold to form an exhaust port on the top cover plate for pressure relief, thereby preventing the secondary battery from exploding due to excessive gas pressure inside. However, the explosion-proof valve mainly works when a large amount of gas is produced inside the secondary battery, and cannot solve the problems of bulging, deformation, and increased air pressure caused by slow or small amount of gas production inside the secondary battery. Moreover, the explosion-proof valve is a disposable component, which will destroy the structure of the battery after it works. Therefore, it has great limitations and will still affect the safety of the secondary battery. The other is to add a pressure relief valve for exhaust. However, the existing pressure relief valve will bring out part of the electrolyte while discharging the gas, which is likely to cause serious corrosion to the surrounding environment and equipment, resulting in the battery cell being unable to continue to be used.

[0027] To solve the above technical problems, Figures 1 to 17 As shown, in a first aspect of the present invention, an exhaust valve 100 is provided, comprising: An inner valve body 110, wherein the inner valve body 110 is provided with a first opening 111 and a second opening 112 at two ends along the axial direction, wherein the first opening 111 is used to communicate with the exhaust hole 211 of the gas production equipment; A movable member 120, wherein the movable member 120 is arranged at the second opening 112 and moves along an axial direction perpendicular to the inner valve body 110, and the movable member 120 partially covers the upper end surface of the inner valve body 110, and is clearance-matched with the inner valve body 110 to form an exhaust passage; An outer valve body 130, wherein the outer valve body 130 is fixedly sleeved outside the inner valve body 110, and an exhaust port 1321 is provided on the outer valve body 130, and the exhaust port 1321 is communicated with the exhaust passage; A stopper 140, wherein the stopper 140 is disposed at the first opening 111 of the inner valve body 110, and a sealing member 150 is disposed at the bottom end of the stopper 140 located at the first opening 111; The movable part 120 and the limiting part 140 have a first state of contact and cooperation at a first position and a second state of contact and cooperation at a second position, wherein along the axial direction of the inner valve body 110, the first position is farther away from the exhaust hole 211 relative to the second position; and in the first state, the limiting part 140 and the sealing part 150 are pressed and fitted so that the exhaust hole 211 is in a sealed state; in the second state, the limiting part 140 and the sealing part 150 are clearance-fitted so that the exhaust hole 211 and the exhaust channel are in a connected state.

[0028] For details, see Figure 13-Figure 14 and Figure 21-22The inner valve body 110 is a hollow cavity structure with two ends through-through, and has a first opening 111 and a second opening 112 at the two ends along the axial direction, wherein the first opening 111 is located at the lower end of the inner valve body 110 and is connected to the exhaust hole 211 of the gas production equipment, and the diameter of the first opening 111 is at least larger than the area of ​​the exhaust hole 211; the upper end of the inner valve body 110 has an inverted truncated cone structure, and the second opening 112 is opened on the inverted truncated cone structure, and the diameter of the second opening 112 is smaller than the diameter of the first opening 111, so that the movable part 120 is movably arranged above the second opening 112. The exhaust hole 211 of the gas production equipment can be a liquid injection hole of a battery, such as a liquid injection hole of a lithium-ion battery, through which the battery can be exhausted and the electrolyte injection operation of the battery can be performed.

[0029] The inner valve body 110 is movably provided with a movable part 120 at the second opening 112. The movable part 120 moves horizontally left and right along the axial direction perpendicular to the valve body. The movable part 120 cooperates with the upper end surface clearance of the inner valve body 110 at the second opening 112 to form an exhaust passage, that is, the inner and outer sides of the inner valve body 110 are connected through the gap between the movable part 120 and the inner valve body 110, and the gas in the hollow cavity of the inner valve body 110 flows to the outside of the inner valve body 110 through the exhaust passage.

[0030] The outer valve body 130 is sleeved on the outside of the inner valve body 110, and the two are relatively fixedly connected. At least one exhaust port 1321 connected to the outside is opened on the top wall of the outer valve body 130 opposite to the second opening 112. There can be multiple exhaust ports 1321, and the multiple exhaust ports 1321 are evenly distributed on the top wall of the outer valve body 130, so as to control the gas in the battery to be discharged with a uniform airflow. Exemplarily, the number of exhaust ports 1321 is 2, 3, 4, etc.

[0031] A sealing member 150 is provided in the inner valve body 110 at the first opening 111 and on the upper surface of the exhaust hole 211. The sealing member 150 may be a sealing gasket, such as a rubber gasket, etc. The sealing gasket has the ability to be compressed and deformed. A limiting member 140 is provided between the sealing member 150 and the movable member 120 inside the inner valve body 110. The contact and matching position of the limiting member 140 and the movable member 120 is adjusted based on the working state of the exhaust valve 100 (the working state includes the sealing state and the exhaust state).

[0032] Among them, when the exhaust valve 100 is in a sealed state, the movable part 120 and the limit part 140 are in contact and cooperate with each other at the first position, and the limit part 140 applies downward pressure to the sealing part 150, the sealing part 150 is deformed, and the sealing part 150 is pressed to the upper end surface of the exhaust hole 211, so that the limit part 140, the sealing part 150 and the upper end surface of the exhaust hole 211 are in a tightly fitted state, and the exhaust hole 211 is sealed by the cooperation of the limit part 140 and the sealing part 150, so as to prevent the exhaust hole 211 from being connected with the exhaust channel in the inner valve body 110, thereby ensuring the sealing performance of the gas production equipment.

[0033] When the exhaust valve 100 is in the exhaust state, the gas generated by the gas production equipment can be discharged upward through the exhaust hole 211, pushing the limiter 140, so that the limiter 140 moves upward, and then the contact and matching position of the limiter 140 and the movable part 120 is switched from the first position to the second position, and the pressure applied to the sealing member 150 is released during the upward movement of the limiter 140, and a gas flow gap is formed between the sealing member 150 and the limiter 140, and between the sealing member 150 and the upper end surface of the exhaust hole 211. The gas flow gap is connected with the exhaust channel in the inner valve body 110, so that the gas discharged from the gas production equipment can be discharged outward through the gas flow gap, the exhaust channel and the exhaust port 1321 on the outer valve body 130 in sequence. Among them, the first position is set away from the exhaust hole 211 relative to the second position, that is, the distance between the first position and the exhaust hole 211 is greater than the distance between the second position and the exhaust hole 211, and the distance deviation between the first position and the second position relative to the exhaust hole 211 is used to realize the switching of the exhaust valve 100 between the sealing state and the exhaust state. Since part of the movable part 120 covers the upper end surface of the inner valve body 110 at the second opening 112, the gas discharged from the gas production equipment can only be discharged outward through the gap between the movable part 120 and the inner valve body 110, while the liquid is blocked by the movable part 120 and flows into the hollow cavity structure of the inner valve body 110, thereby preventing the liquid from causing serious corrosion to the surrounding environment and equipment, and improving the safety of the use of the gas production equipment. The liquid discharged from the gas production equipment can be an electrolyte, etc.

[0034] The exhaust valve 100 provided in the embodiment of the present application has a simple structure, which can ensure that the internal pressure of the gas producing equipment will not increase excessively when the gas producing equipment produces gas slowly, thereby avoiding bulging and deformation problems caused by the small amount of gas produced by the gas producing equipment, and the exhaust method is gentle and will not damage the structure of the gas producing equipment; it can also ensure that the liquid is not discharged during exhaust, thereby avoiding serious corrosion to the surrounding environment and equipment, improving the safety of the gas producing equipment, and ensuring the performance of the gas producing equipment.

[0035] In some embodiments, Figures 4 to 6As shown, the movable part 120 includes: a shielding portion 121 and a rod body 122, the shielding portion 121 is arranged between the upper end surface of the inner valve body 110 and the outer valve body 130, and covers the second opening 112; the rod body 122 passes through the second opening 112 and extends toward the bottom side of the inner valve body 110, and the rod body 122 is in contact with the limiting member 140, and the shielding portion 121 and the rod body 122 are both clearance-matched with the inner valve body 110 to form the exhaust channel.

[0036] Specifically, the shielding portion 121 is vertically fixedly connected to the rod body 122. The shielding portion 121 is horizontally movable left and right along the axial direction perpendicular to the inner valve body 110 and is disposed between the upper end surface of the inner valve body 110 and the top wall of the outer valve body 130. During the horizontal movement of the shielding portion 121, the rod body 122 is driven to move left and right inside the inner valve body 110. During the horizontal movement, the rod body 122 always maintains a contact and matching state with the stopper 140. Among them, the area of ​​the shielding portion 121 is larger than the area of ​​the second opening 112, the diameter of the rod body 122 is smaller than the diameter of the second opening 112, and the shielding portion 121 and the rod body 122 are both gap-matched with the inner valve body 110, so that the inner valve body 110 forms an exhaust passage communicating with the inside and outside at the second opening 112, and effectively blocks the liquid while exhausting the gas, so as to prevent the liquid from being discharged out of the exhaust valve 100.

[0037] In some embodiments, the rod body 122 and the stopper 140 are respectively provided with a first arc-shaped protrusion 1221 and a second arc-shaped protrusion 141 on one side close to each other, and in the first state, the vertex of the first arc-shaped protrusion 1221 and the vertex of the second arc-shaped protrusion 141 are in contact and fit; in the second state, the side of the first arc-shaped protrusion 1221 and the side of the second arc-shaped protrusion 141 are in contact and fit; or, The first wedge head 1223 and the second wedge head 142 are respectively provided on the side close to each other of the rod body 122 and the limit member 140, and the first wedge head 1223 and the second wedge head 142 respectively have a first inclined surface 1224 and a second inclined surface 1421, and the first inclined surface 1224 and the second inclined surface 1421 are relatively slidably arranged, and the inclination directions of the first inclined surface 1224 and the second inclined surface 1421 are the same, and the inclination directions are inclined relative to the axial direction of the inner valve body 110.

[0038] Specifically, the rod body 122 and the limiting member 140 have two contact matching structures, one of which is: Figures 3 to 8As shown, the rod body 122 is a cylindrical structure, and a first arc-shaped protrusion 1221 is provided on the side of the rod body 122 close to the stopper 140, and the first arc-shaped protrusion 1221 and the rod body 122 are an integrally formed structure; a second arc-shaped protrusion 141 is provided on the side of the stopper 140 close to the rod body 122, and the stopper 140 forms a recessed portion at a position opposite to the second arc-shaped protrusion 141 on the side away from the rod body 122, and the diameter of the recessed portion is larger than the inner diameter of the sealing gasket, the inner diameter of the sealing gasket is smaller than the diameter of the exhaust hole 211, and the outer diameter of the sealing gasket is larger than the diameter of the exhaust hole 211, which is conducive to the effective sealing of the exhaust hole 21. Among them, the first arc-shaped protrusion 1221 and the second arc-shaped protrusion 141 can be hemispherical bosses.

[0039] like Fig.21 As shown, in the first state, the first arc-shaped protrusion 1221 of the rod body 122 and the second arc-shaped protrusion 141 of the limit member 140 are in contact and matched at the vertex position, and the limit member 140 applies downward pressure to the seal 150, and the seal 150 is deformed, pressing the seal 150 to the upper end surface of the exhaust hole 211 of the gas producing equipment, so that the limit member 140, the seal 150 and the upper end surface of the exhaust hole 211 are in a tightly matched state, so that the exhaust valve 100 is in a sealed state, realizing the sealing effect on the exhaust hole 211, and ensuring the sealing performance of the gas producing equipment.

[0040] like Fig. 22 As shown, in the second state, the gas generated by the gas producing equipment is discharged outwardly through the exhaust hole 211 and pushes the limit member 140 upward, and the vertex contact positions of the first arc-shaped protrusion 1221 and the second arc-shaped protrusion 141 are displaced, so that the sealing member 150 shrinks to a certain extent in the horizontal direction. At the same time, a gap is generated between the sealing member 150 and the limit member 140 and the upper end surface of the exhaust hole 211 along the axial direction of the inner valve body 110, and the gap is connected with the exhaust channel and the exhaust port 1321 of the outer valve body 130, so that the gas generated by the gas producing equipment is discharged to the outside through the exhaust valve 100.

[0041] Another contact matching structure of the rod body 122 and the limiting member 140 is: Figures 15 to 17As shown, the rod body 122 and the stopper 140 are respectively provided with a matching first wedge head 1223 and a second wedge head 142 on the side close to each other, wherein the first wedge head 1223 is provided with a first inclined surface 1224, a first vertical surface 1225 and a first horizontal surface 1223 on the side close to the second wedge head 142; the second wedge head 142 is provided with a second inclined surface 1421, a second vertical surface 1422 and a third inclined surface 1423 on the side close to the first wedge head 1223. 423, the first inclined surface 1224 and the second inclined surface 1421 have the same inclination direction, and the inclination direction is inclined relative to the axial direction of the inner valve body 110, and the first inclined surface 1224 and the second inclined surface 1421 can slide relatively; the first vertical surface 1225 and the second vertical surface 1422 are arranged parallel to the axial direction of the inner valve body 110, the first horizontal surface 1223 is arranged perpendicular to the axial direction of the inner valve body 110, and the third inclined surface 1423 is inclined relative to the first horizontal surface 1223.

[0042] In the first state, the first inclined surface 1224 of the first wedge head 1223 and the second inclined surface 1421 of the second wedge head 142 are completely matched and in contact with each other, and the limit member 140 applies downward pressure to the seal 150, which deforms and presses the seal 150 to the upper end surface of the exhaust hole 211 of the gas producing equipment, so that the limit member 140, the seal 150 and the upper end surface of the exhaust hole 211 are in a tight fit state, so that the exhaust valve 100 is in a sealed state, thereby achieving a sealing effect on the exhaust hole 211 and ensuring the sealing performance of the gas producing equipment.

[0043] In the second state, the gas generated by the gas producing equipment is discharged outward through the exhaust hole 211 and pushes the limit member 140 upward, and the first inclined surface 1224 and the second inclined surface 1421 slide relative to each other, that is, the second inclined surface 1421 of the limit member 140 moves obliquely upward, driving the first inclined surface 1224 of the rod body 122 to move obliquely downward, so that the contact position of the first inclined surface 1224 and the second inclined surface 1421 is displaced, and the sealing member 150 shrinks to a certain extent in the horizontal direction. At the same time, a gap is generated between the sealing member 150 and the limit member 140 and the upper end surface of the exhaust hole 211 along the axial direction of the inner valve body 110, and the gap is connected with the exhaust channel and the exhaust port 1321 of the outer valve body 130, so that the gas generated by the gas producing equipment is discharged to the outside through the exhaust valve 100.

[0044] It is understandable that the two contact and matching structures of the rod body 122 and the stopper 140 can realize the automatic exhaust of the gas production equipment, avoid the bulging and deformation problems caused by the small amount of gas production of the gas production equipment, and the exhaust method is gentle and will not damage the structure of the gas production equipment. Fig. 22As shown, the exhaust air flow direction is: the gas generated in the gas production equipment is first discharged through the exhaust hole 211, flows through the gap between the seal 150 and the limit member 140 and the upper end surface of the exhaust hole 211, then flows through the hollow cavity of the inner valve body 110, and then flows to the gap between the shielding portion 121 and the inner valve body 110, and finally is discharged to the outside through the exhaust port 1321 of the outer valve body 130.

[0045] In some embodiments, Figures 9 to 12 As shown, the outer valve body 130 includes a first side wall 131 and a first top wall 132, the first side wall 131 is provided with a guide hole 1311, the shielding portion 121 is partially provided in the guide hole 1311, and moves along an axial direction perpendicular to the inner valve body 110; the first top wall 132 is provided at the top end of the first side wall 131, and the exhaust port 1321 is provided on the first top wall 132.

[0046] Specifically, the first side wall 131 is fixedly sleeved outside the side wall of the inner valve body 110, and a penetrating guide hole 1311 is opened at the upper part of the first side wall 131. In the direction perpendicular to the axial direction of the inner valve body 110, the opening area of ​​the guide hole 1311 is not larger than the cross-sectional area of ​​the outer valve body 130, so that the shielding portion 121 can be movably arranged in the guide hole 1311 between the inner valve body 110 and the outer valve body 130 in the horizontal direction (i.e., perpendicular to the axial direction of the inner valve body 110), and the movable member 120 can extend out of the outer valve body 130 through the guide hole 1311, and can also be retracted into the outer valve body 130 through the guide hole 1311. A first top wall 132 is fixedly arranged at the upper end of the first side wall 131, and the first top wall 132 is provided with an exhaust port 1321 communicating with the outside, and the exhaust port 1321 is one or more, which can be arranged according to actual needs. Among them, the first side wall 131 can be a circular side wall or a square side wall, etc., and the corresponding first top wall 132 is a circular top wall or a square top wall. The first side wall 131 and the first top wall 132 can also be other shapes, which is not particularly limited in the embodiment of the present application.

[0047] It can be understood that when the movable part 120 moves horizontally to the outside of the outer valve body 130 through the guide hole 1311, the limit member 140 and the movable part 120 contact and cooperate in the first position, and the limit member 140 applies downward pressure to the sealing member 150, the sealing member 150 is deformed, and the sealing member 150 is pressed to the upper end surface of the exhaust hole 211, so that the limit member 140, the sealing member 150 and the upper end surface of the exhaust hole 211 are in a tight fit state, thereby ensuring the sealing performance of the exhaust valve 100. When the movable part 120 moves horizontally into the outer valve body 130 through the guide hole 1311, it will drive the limiting part 140 to move in the horizontal direction, and the directions of the horizontal movement of the movable part 120 and the limiting part 140 are opposite, thereby changing the contact and matching position of the movable part 120 and the limiting part 140, switching from the first position to the second position, and utilizing the height difference between the first position and the second position to make the limiting part 140 move upward during the horizontal movement, thereby forming a gas flow gap between the sealing part 150 and the limiting part 140 and the upper end surface of the exhaust hole 211, and the gas flow gap is connected to the exhaust channel in the inner valve body 110, so that the gas discharged from the gas production equipment can be discharged to the outside through the gas flow gap, the exhaust channel and the exhaust port 1321 on the outer valve body 130 in sequence.

[0048] In some embodiments, Figure 4 and Figure 6 As shown, the shielding portion 121 includes a first baffle 1211 and a second baffle 1212 that are fixedly connected, the first baffle 1211 covers the second opening 112, and the second baffle 1212 is disposed in the guide hole 1311 and can move along an axial direction perpendicular to the inner valve body 110; wherein, The second baffle 1212 has a third position state extending out of the guide hole 1311 and a fourth position state extending into the guide hole 1311; in the third position state, the rod body 122 and the limiting member 140 are in contact and cooperation at the first position; in the fourth position state, the rod body 122 and the limiting member 140 are in contact and cooperation at the second position.

[0049] Specifically, the first baffle 1211 and the second baffle 1212 are both movably arranged between the upper end surface of the inner valve body 110 and the first top wall 132 of the outer valve body 130, wherein the first baffle 1211 covers the second opening 112, and the cross-sectional area of ​​the first baffle 1211 is larger than the area of ​​the second opening 112, and can cover the second opening 112, and the bottom of the first baffle 1211 is matched with the gap between the upper end surface of the inner valve body 110, and the gap is connected to the exhaust channel in the inner valve body 110, so that the gas can be discharged to the outside of the inner valve body 110 through the gap, while the liquid in the battery cannot be discharged to the outside of the inner valve body 110 through the gap due to the obstruction of the first fan-shaped plate.

[0050] The second baffle 1212 moves through the guide hole 1311 along the axial direction perpendicular to the inner valve body 110, and has a third position state extending out of the guide hole 1311 and a fourth position state retracted into the guide hole 1311. In the third position state, the rod body 122 and the stopper 140 are in contact and cooperation at the first position, so that the exhaust valve 100 is in a sealing state; in the fourth position state, the rod body 122 and the stopper 140 are in contact and cooperation at the second position, so that the exhaust valve 100 is in an exhaust state.

[0051] In some embodiments, Figure 6 As shown, the first baffle 1211 and the second baffle 1212 are respectively arranged in a fan shape, and an end surface of one of the two away from the other is an arc-shaped end surface 1213.

[0052] Specifically, the first baffle 1211 and the second baffle 1212 can be fan-shaped baffles or irregularly shaped baffles. This application does not make any special limitations. It is preferred to use a fan-shaped baffle. The end face of the second baffle 1212 extending out of the guide hole 1311 is an arc-shaped end face 1213, which is convenient for applying a thrust to the second baffle 1212 along the axis perpendicular to the inner valve body 110. The thrust is used to move the second baffle 1212 toward the inside of the outer valve body 130, so that the contact and matching position of the rod body 122 and the limit member 140 is changed, switching from the first position to the second position, thereby realizing forced exhaust of the exhaust valve 100.

[0053] In some embodiments, Fig. 22 As shown, the exhaust valve 100 further includes an exhaust pipe 160, and the exhaust pipe 160 includes a second side wall 161, and the second side wall 161 is slidably mounted on the first side wall 131, and switches the second baffle 1212 from the third position state to the fourth position state.

[0054] Specifically, when the second baffle 1212 is in the third position state extending out of the guide hole 1311, if the gas production equipment has a need for exhaust, the forced exhaust of the gas production equipment can be achieved through the exhaust pipe 160, specifically: the exhaust pipe 160 is slidably sleeved outside the outer valve body 130, and the exhaust pipe 160 provides a thrust for the second baffle 1212 to move toward the inside of the outer valve body 130, and the second baffle 1212 is switched from the third position state to the fourth position state, so that the contact and matching position of the rod body 122 and the limiter 140 is switched from the first position to the second position, thereby achieving forced exhaust of the exhaust valve 100. Among them, the shape of the second side wall 161 is the same as that of the first side wall 131. For example, the first side wall 131 and the second side wall 161 are both circular side walls, and the two are slidably assembled. The top of the second side wall 161 may also be provided with a second top wall 162, or the second top wall 162 may not be provided.

[0055] It should be noted that although a guide hole 1311 is provided on the first side wall 131 of the outer valve body 130, during the forced exhaust process of the exhaust valve 100, the exhaust pipe 160 blocks the guide hole 1311, so that the gas in the gas production equipment can only be discharged to the outside through the exhaust port 1321 of the outer valve body 130.

[0056] In some embodiments, Figure 3 and Fig.15 As shown, a welding portion 1312 is provided at a lower end of the first side wall 131 close to the exhaust hole 211 .

[0057] Specifically, the outer valve body 130 can be sealed and connected to the gas production equipment through the welding portion 1312, so that the exhaust valve 100 can be stably fixed on the gas production equipment.

[0058] In some embodiments, Figure 3 and Fig.15 As shown, a limiting groove 1222 is provided on the side wall of the rod body 122 , and an elastic member 170 is assembled in the limiting groove 1222 . Two ends of the elastic member 170 are fixedly connected to the rod body 122 and the inner valve body 110 , respectively.

[0059] Specifically, an elastic member 170 is installed on the side wall of the rod body 122 away from the second baffle 1212. The elastic member 170 may be a spring, and the two ends of the elastic member 170 are fixedly connected to the side wall of the rod body 122 and the inner wall of the inner valve body 110 respectively. When the exhaust valve 100 is in the first sealed state, the elastic member 170 is in a naturally extended state; when the exhaust valve 100 is in the second exhaust state, the elastic member 170 is in a compressed state. After the exhaust valve 100 is exhausted, the elastic force of the elastic member 170 causes the rod body 122 and the limiter 140 to switch from the contact and cooperation at the second position to the contact and cooperation at the first position, thereby providing a reset force for the rod body 122 and the limiter 140, realizing the reuse of the exhaust valve 100 and improving the utilization rate of the exhaust valve 100.

[0060] The second aspect of the present invention, as Figures 18 to 22 As shown, a battery cover assembly 200 is provided, including a cover body 210, the cover body 210 is provided with the exhaust hole 211, and the exhaust valve 100 described in any embodiment of the present application is provided at the exhaust hole 211.

[0061] Specifically, the battery cover body 210 is provided with an exhaust hole 211, which can be a liquid injection hole for the battery, through which the battery can be exhausted and the electrolyte injection operation of the battery can be performed. The exhaust valve 100 described in any embodiment of the present application is sealed and installed at the exhaust hole 211, which can ensure that the internal pressure will not increase excessively when the battery produces gas slowly, avoid bulging and deformation caused by a small amount of gas production in the battery, and the exhaust method is gentle and will not damage the structure of the battery; it can also ensure that the liquid is not discharged during exhaust, avoid serious corrosion to the surrounding environment and equipment, improve the safety of the gas production equipment, and ensure the performance of the gas production equipment.

[0062] It should be noted that the specific technical features and technical effects of the battery cover assembly 200 provided in the embodiment of the present application are consistent with the technical features and technical effects of the exhaust valve 100, and will not be repeated in the embodiment of the present application.

[0063] According to a third aspect of the present invention, a battery is provided. The battery includes the exhaust valve 100 described in any embodiment of the present application, or includes the battery cover plate assembly 200 described in any embodiment of the present application.

[0064] Specifically, the exhaust valve 100 can timely exhaust the gas generated by the electrolyte reaction inside the battery cell to stabilize the internal gas pressure of the battery cell. The specific technical features and technical effects of the battery are consistent with the technical features and technical effects of the exhaust valve 100, and the embodiments of this application will not be repeated. Among them, the battery can be a lithium-ion battery, etc.

[0065] A fourth aspect of the present invention provides an electrical device, wherein the electrical device comprises the battery described in any embodiment of the present application.

[0066] Specifically, the specific technical features and technical effects of the electrical equipment are consistent with the technical features and technical effects of the exhaust valve, and will not be repeated in the embodiments of the present application.

[0067] It should be pointed out that electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. Vehicles may be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiments of the present invention do not impose any special restrictions on the above-mentioned electrical equipment.

[0068] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An exhaust valve (100), characterized in that: include: An inner valve body (110), wherein the inner valve body (110) is provided with a first opening (111) and a second opening (112) at two axial ends thereof, wherein the first opening (111) is used to communicate with an exhaust hole (211) of a gas production device; a movable member (120), the movable member (120) being arranged at the second opening (112) in an axial direction perpendicular to the inner valve body (110), the movable member (120) partially covering the upper end surface of the inner valve body (110) and being clearance-matched with the inner valve body (110) to form an exhaust passage; an outer valve body (130), the outer valve body (130) being fixedly sleeved outside the inner valve body (110), the outer valve body (130) being provided with an exhaust port (1321), the exhaust port (1321) being communicated with the exhaust passage; a limiting member (140), the limiting member (140) being arranged at the first opening (111) of the inner valve body (110), and a sealing member (150) being arranged at the bottom end of the limiting member (140) located at the first opening (111); The movable member (120) and the limiting member (140) have a first state in which they are in contact and fit at a first position, and a second state in which they are in contact and fit at a second position, wherein, along the axial direction of the inner valve body (110), the first position is farther away from the exhaust hole (211) relative to the second position; and in the first state, the limiting member (140) and the sealing member (150) are pressed and fit so that the exhaust hole (211) is in a sealed state; and in the second state, the limiting member (140) and the sealing member (150) are clearance-fitted so that the exhaust hole (211) and the exhaust channel are in a connected state.

2. The exhaust valve (100) according to claim 1, characterized in that: The movable member (120) comprises: a shielding portion (121) and a rod body (122); the shielding portion (121) is arranged between the upper end surface of the inner valve body (110) and the outer valve body (130), and covers the second opening (112); the rod body (122) passes through the second opening (112) and extends toward the bottom side of the inner valve body (110), and the rod body (122) is in contact with the limiting member (140), and the shielding portion (121) and the rod body (122) are both clearance-matched with the inner valve body (110) to form the exhaust channel.

3. The exhaust valve (100) according to claim 2, characterized in that: A first arc-shaped protrusion (1221) and a second arc-shaped protrusion (141) are respectively provided on the side of the rod body (122) and the stopper (140) that are close to each other; in the first state, the vertex of the first arc-shaped protrusion (1221) and the vertex of the second arc-shaped protrusion (141) are in contact and fit; in the second state, the side of the first arc-shaped protrusion (1221) and the side of the second arc-shaped protrusion (141) are in contact and fit; or, A first wedge-shaped head (1223) and a second wedge-shaped head (142) are respectively provided on the side where the rod body (122) and the limiting member (140) are close to each other. The first wedge-shaped head (1223) and the second wedge-shaped head (142) respectively have a first inclined surface (1224) and a second inclined surface (1421). The first inclined surface (1224) and the second inclined surface (1421) are relatively slidably arranged. The first inclined surface (1224) and the second inclined surface (1421) have the same inclination direction, and the inclination direction is inclined relative to the axial direction of the inner valve body (110).

4. The exhaust valve (100) according to claim 2, characterized in that: The outer valve body (130) comprises a first side wall (131) and a first top wall (132); the first side wall (131) is provided with a guide hole (1311); the shielding portion (121) is partially provided in the guide hole (1311) and is movable in an axial direction perpendicular to the inner valve body (110); the first top wall (132) is provided at the top end of the first side wall (131), and the exhaust port (1321) is provided on the first top wall (132).

5. The exhaust valve (100) according to claim 4, characterized in that: The shielding portion (121) comprises a first baffle (1211) and a second baffle (1212) which are fixedly connected, the first baffle (1211) covering the second opening (112), the second baffle (1212) being arranged in the guide hole (1311) and being movable along an axial direction perpendicular to the inner valve body (110); wherein: The second baffle (1212) has a third position state extending out of the guide hole (1311) and a fourth position state extending into the guide hole (1311); in the third position state, the rod body (122) and the limiting member (140) are in contact and cooperation at the first position; in the fourth position state, the rod body (122) and the limiting member (140) are in contact and cooperation at the second position.

6. The exhaust valve (100) according to claim 5, characterized in that: The first baffle (1211) and the second baffle (1212) are respectively arranged in a fan shape, and an end surface of one of the two that is away from the other is arranged in an arc-shaped end surface (1213).

7. The exhaust valve (100) according to claim 5, characterized in that: The exhaust valve (100) further comprises an exhaust pipe (160), wherein the exhaust pipe (160) comprises a second side wall (161); the second side wall (161) is slidably sleeved on the first side wall (131) and enables the second baffle (1212) to switch from the third position state to the fourth position state.

8. The exhaust valve (100) according to any one of claims 4 to 7, characterized in that: A welding portion (1312) is provided at the lower end of the first side wall (131) close to the exhaust hole (211).

9. The exhaust valve (100) according to any one of claims 2 to 7, characterized in that: A limiting groove (1222) is provided on the side wall of the rod body (122), an elastic member (170) is installed in the limiting groove (1222), and two ends of the elastic member (170) are respectively fixedly connected to the rod body (122) and the inner valve body (110).

10. A battery cover assembly (200), characterized in that: It comprises a cover plate body (210), the cover plate body (210) being provided with the exhaust hole (211), and the exhaust valve (100) according to any one of claims 1 to 9 being provided at the exhaust hole (211).

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