Exhaust valve and battery cover plate assembly

Abstract

The utility model discloses an exhaust valve and a battery cover plate assembly, the exhaust valve comprises an inner valve body, a movable piece, an outer valve body and a limiting piece, 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 utility model 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 secondary batteries continues to increase, they face the increasingly serious problem of gas generation inside them. As the amount of gas generated inside the secondary battery increases, it will gradually cause the secondary battery shell to bulge and deform, and the internal gas pressure will be too high, causing explosion.

[0003] To address internal gassing in secondary batteries, explosion-proof valves or pressure relief valves are typically installed on the battery cover assembly. However, explosion-proof valves are effective only when large amounts of gas are generated within the secondary battery. They cannot address issues such as bulging, deformation, and increased pressure caused by slow or low-volume gassing. When the pressure relief valve vents gas, it also releases some electrolyte, which can cause severe corrosion to the surrounding environment and equipment, rendering the battery cell unusable. Utility Model Content

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

[0005] In a first aspect of the present invention, an exhaust valve is provided, comprising:

[0006] An inner valve body, wherein the inner valve body is provided with a first opening and a second opening at both ends along the axial direction, wherein the first opening is configured to communicate with the exhaust hole of the gas production equipment;

[0007] a movable member, the movable member being arranged at the second opening and movable along an axial direction perpendicular to the inner valve body, the movable member partially covering the upper end surface of the inner valve body, and being clearance-matched with the inner valve body to form an exhaust passage;

[0008] An outer valve body, the outer valve body being fixedly sleeved on the outer valve body, the outer valve body being provided with an exhaust port, the exhaust port being communicated with the exhaust passage;

[0009] A limiting member, the limiting member is arranged at the first opening of the inner valve body, and a sealing member is arranged at the bottom end of the limiting member at the first opening;

[0010] 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 fitted 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.

[0011] In addition, the exhaust valve of the present invention may also have the following additional technical features:

[0012] Preferably, the movable part includes: a shielding part and a rod body, the shielding part 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 part, and the shielding part and the rod body are both clearance-matched with the inner valve body to form the exhaust channel.

[0013] Preferably, a first arc-shaped protrusion and a second arc-shaped protrusion are respectively provided on a side of the rod body and the limiting member that are close to each other. In the first state, the apex of the first arc-shaped protrusion and the apex 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;

[0014] or,

[0015] A first wedge-shaped head and a second wedge-shaped head are respectively provided on the side where the rod body and the limit member are close to each other. The first wedge head and the second wedge head respectively have a first inclined surface and a second inclined surface. The first inclined surface and the second inclined surface are arranged to slide relative to each other. The inclination directions of the first inclined surface and the second inclined surface are the same, and the inclination directions are arranged to be inclined relative to the axial direction of the inner valve body.

[0016] 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 along 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.

[0017] 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,

[0018] 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 limiting member are in contact and cooperation at the first position; in the fourth position state, the rod body and the limiting member are in contact and cooperation at the second position.

[0019] Preferably, the first baffle and the second baffle are respectively configured to be fan-shaped, and an end surface of one of the baffles away from the other is configured to be an arc-shaped end surface.

[0020] 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 switches the second baffle from the third position to the fourth position.

[0021] Preferably, a welding portion is provided at a lower end of the first side wall close to the exhaust hole.

[0022] 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.

[0023] A second aspect of the present invention provides a battery cover assembly, comprising a cover body, the cover body being provided with the exhaust hole, and the exhaust valve described in any embodiment of the present application being provided at the exhaust hole.

[0024] According to a third aspect of the present invention, a battery is provided, wherein the battery includes the exhaust valve described in any embodiment of the present application, or includes the battery cover assembly described in any embodiment of the present application.

[0025] A fourth aspect of the present invention provides an electrical device, wherein the electrical device includes the battery described in any embodiment of the present application.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0028] Figure 1 A three-dimensional structural diagram of an exhaust valve provided in an embodiment of the present application;

[0029] Figure 2 An exploded view of an exhaust valve provided in an embodiment of the present application;

[0030] Figure 3A cross-sectional view of an exhaust valve provided in an embodiment of the present application;

[0031] Figure 4 A three-dimensional structural diagram of a movable part provided in an embodiment of the present application;

[0032] Figure 5 for Figure 4 Provide a front view of the moving parts;

[0033] Figure 6 A structural diagram of a shielding portion provided in an embodiment of the present application;

[0034] Figure 7 A three-dimensional structural diagram of a position limiting member provided in an embodiment of the present application;

[0035] Figure 8 for Figure 7 The main view of the provided limiter;

[0036] Figure 9 A three-dimensional structural diagram of the outer valve body provided in an embodiment of the present application;

[0037] Figure 10 for Figure 9 A top view of the outer valve body is provided;

[0038] Figure 11 for Figure 9 A front view of the outer valve body is provided;

[0039] Figure 12 for Figure 9 A side view of the outer valve body is provided;

[0040] Figure 13 A three-dimensional structural diagram of the inner valve body provided in an embodiment of the present application;

[0041] Figure 14 for Figure 13 Provided front view of the inner valve body;

[0042] Figure 15 Another structural diagram of the coordination between the movable member and the limiting member provided in the embodiment of the present application;

[0043] Figure 16 A three-dimensional structural diagram of another movable part provided in an embodiment of the present application;

[0044] Figure 17 A three-dimensional structural diagram of another limiting member provided in an embodiment of the present application

[0045] Figure 18 A top view of a battery cover assembly provided in an embodiment of the present application;

[0046] Figure 19A side view of a battery cover assembly provided in an embodiment of the present application;

[0047] Figure 20 for Figure 19 A partial enlarged view of the middle part;

[0048] Figure 21 This is a structural diagram of the exhaust valve in a sealed state;

[0049] Figure 22 This is a structural diagram of the exhaust valve in the exhaust state.

[0050] In the above picture:

[0051] 100 exhaust valve;

[0052] 110 inner valve body; 111 first opening; 112 second opening;

[0053] 120 movable part; 121 shielding portion; 1211 first baffle; 1212 second baffle; 1213 arc-shaped end surface;

[0054] 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;

[0055] 130 outer valve body; 131 first side wall; 1311 guide hole; 1312 welding portion; 132 first top wall; 1321 exhaust port;

[0056] 140: stopper; 141: second arc-shaped protrusion; 142: second wedge-shaped head; 1421: second inclined surface; 1422: second vertical surface; 1423: third inclined surface;

[0057] 150 seals;

[0058] 160 exhaust pipe; 161 second side wall; 162 second top wall;

[0059] 170 elastic parts;

[0060] 200 battery cover assembly; 210 cover body; 211 exhaust hole. DETAILED DESCRIPTION

[0061] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only portions relevant to the utility model are shown in the accompanying drawings.

[0062] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0063] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a," "the," and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

[0064] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, that is, meaning "including, but not limited to."

[0065] Throughout the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

[0066] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified 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.

[0067] There are currently 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 to release pressure, thereby preventing the secondary battery from exploding due to excessive gas pressure. However, the explosion-proof valve mainly works when a large amount of gas is produced inside the secondary battery, and cannot solve problems such as bulging, deformation, and increased air pressure caused by slow or small amounts 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 is activated. 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 some electrolyte when discharging gas, which can easily cause serious corrosion to the surrounding environment and equipment, making the battery cell unusable.

[0068] In order 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:

[0069] An inner valve body 110, wherein the inner valve body 110 is provided with a first opening 111 and a second opening 112 at both ends along the axial direction, wherein the first opening 111 is configured to communicate with the exhaust hole 211 of the gas production equipment;

[0070] a movable member 120, the movable member 120 being arranged at the second opening 112 and movable along 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;

[0071] An outer valve body 130 , the outer valve body 130 is fixedly sleeved on the outer side of 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 channel;

[0072] A limiting member 140 is provided at the first opening 111 of the inner valve body 110 , and a sealing member 150 is provided at the bottom end of the limiting member 140 located at the first opening 111 ;

[0073] 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.

[0074] For details, see Figure 13-14 and Figure 21-22 The inner valve body 110 is a hollow cavity structure with two through-holes. It has a first opening 111 and a second opening 112 at its axial ends. The first opening 111 is located at the lower end of the inner valve body 110 and communicates with the exhaust hole 211 of the gas generating device. 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 frustum structure, and the second opening 112 is provided on the inverted frustum structure. The diameter of the second opening 112 is smaller than the diameter of the first opening 111, facilitating the movable member 120 to be movably positioned above the second opening 112. The exhaust hole 211 of the gas generating device can be a liquid injection hole for a battery, such as a lithium-ion battery. This liquid injection hole can be used to both exhaust the battery and inject electrolyte into the battery.

[0075] 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 gap of the inner valve body 110 at the second opening 112 to form an exhaust channel, 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 channel.

[0076] 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 provided 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 facilitate the control of the gas in the battery to be discharged with a uniform airflow. Exemplarily, the number of exhaust ports 1321 is 2, 3, 4, etc.

[0077] A seal 150 is provided within the inner valve body 110 at the first opening 111 and on the upper surface of the exhaust hole 211. The seal 150 can be a sealing gasket, such as a rubber gasket, that is compressibly deformable. A limiter 140 is provided between the seal 150 and the movable member 120 within the inner valve body 110. The contact and mating position of the limiter 140 and the movable member 120 is adjusted based on the operating state of the exhaust valve 100 (including the sealing state and the exhaust state).

[0078] 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 fit 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, thereby preventing the exhaust hole 211 from being connected to the exhaust channel in the inner valve body 110, thereby ensuring the sealing performance of the gas production equipment.

[0079] When the exhaust valve 100 is in the exhaust state, gas generated by the gas-generating equipment can be discharged upward through the exhaust hole 211, pushing the stopper 140, causing the stopper 140 to move upward, thereby switching the contact and engagement position between the stopper 140 and the movable member 120 from the first position to the second position. The upward movement of the stopper 140 releases the pressure applied to the seal 150, forming a gas flow gap between the seal 150 and the stopper 140, and between the seal 150 and the upper end surface of the exhaust hole 211. This gas flow gap is connected to the exhaust passage within the inner valve body 110, allowing gas exhausted from the gas-generating equipment to be discharged outward through the gas flow gap, the exhaust passage, and the exhaust port 1321 on the outer valve body 130. The first position is located farther from the exhaust hole 211 than the second position, i.e., 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. The distance difference between the first and second positions relative to the exhaust hole 211 is utilized to achieve the switching of the exhaust valve 100 between the sealing state and the exhaust state. Because a portion of the movable member 120 covers the upper end surface of the inner valve body 110 at the second opening 112, gas exhausted from the gas generating device can only be discharged outward through the gap between the movable member 120 and the inner valve body 110. Liquid is blocked by the movable member 120 and flows into the hollow cavity structure of the inner valve body 110. This prevents the liquid from causing serious corrosion to the surrounding environment and equipment, thereby improving the safety of the gas generating device. The liquid exhausted from the gas generating device can be an electrolyte, for example.

[0080] The exhaust valve 100 provided in the embodiment of the present application has a simple structure. It can ensure that the internal pressure of the gas production equipment will not increase excessively when the gas production equipment produces gas slowly, avoiding 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; it can also ensure that the liquid is not discharged during exhaust, avoiding serious corrosion to the surrounding environment and equipment, improving the safety of the gas production equipment, and ensuring the performance of the gas production equipment.

[0081] In some embodiments, as Figures 4 to 6 As 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.

[0082] Specifically, the shielding portion 121 is vertically fixedly connected to the rod 122. The shielding portion 121 is disposed between the upper end surface of the inner valve body 110 and the top wall of the outer valve body 130 and moves horizontally left and right along an axial direction perpendicular to the inner valve body 110. During the horizontal movement of the shielding portion 121, the rod 122 is driven to move horizontally left and right within the inner valve body 110. During the horizontal movement, the rod 122 always maintains contact and engagement with the stopper 140. The area of the shielding portion 121 is larger than the area of the second opening 112, the diameter of the rod 122 is smaller than the diameter of the second opening 112, and both the shielding portion 121 and the rod 122 are loosely fitted with the inner valve body 110, so that the inner valve body 110 forms an exhaust passage connecting the inside and outside at the second opening 112. The exhaust passage effectively blocks liquid while exhausting, preventing the liquid from being discharged outside the exhaust valve 100.

[0083] In some embodiments, 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 limiting member 140 that are close to each other. In the first state, the apex of the first arc-shaped protrusion 1221 and the apex of the second arc-shaped protrusion 141 are in contact with each other; 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 with each other.

[0084] or,

[0085] 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. The first wedge head 1223 and the second wedge 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 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.

[0086] 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. A first arc-shaped protrusion 1221 is provided on the side of the rod body 122 close to the stopper 140. The first arc-shaped protrusion 1221 and the rod body 122 are integrally formed. A second arc-shaped protrusion 141 is provided on the side of the stopper 140 close to the rod body 122. The stopper 140 forms a recessed portion on the side away from the rod body 122, opposite the second arc-shaped protrusion 141. The diameter of the recessed portion is larger than the inner diameter of the sealing gasket, which is smaller than the diameter of the exhaust hole 211. The outer diameter of the sealing gasket is larger than the diameter of the exhaust hole 211, which facilitates effective sealing of the exhaust hole 21. The first arc-shaped protrusion 1221 and the second arc-shaped protrusion 141 can be hemispherical bosses.

[0087] like Figure 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 limiter 140 are in contact and matched at the vertex position, and the limiter 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 production equipment, so that the limiter 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 production equipment.

[0088] like Figure 22 As shown, 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. The vertex contact position of the first arc-shaped protrusion 1221 and the second arc-shaped protrusion 141 is displaced, causing the sealing member 150 to shrink 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. The gap is connected to 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.

[0089] Another contact and matching structure of the rod body 122 and the limiting member 140 is: Figures 15 to 17As shown, the rod body 122 and the limiting member 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 1 423, 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 relative to each other; 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.

[0090] 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 limiter 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 production equipment, so that the limiter 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, realizing the sealing effect on the exhaust hole 211 and ensuring the sealing performance of the gas production equipment.

[0091] 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 seal 150 shrinks to a certain extent in the horizontal direction. At the same time, a gap is generated between the seal 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. The gap is connected to 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.

[0092] It is understandable that the two contact and matching structures of the rod body 122 and the limiter 140 can both realize automatic exhaust of the gas production equipment, avoid bulging and deformation problems caused by a 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. Figure 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 blocking part 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.

[0093] In some embodiments, as 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 blocking 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.

[0094] Specifically, the first sidewall 131 is fixedly mounted on the outer sidewall of the inner valve body 110. A guide hole 1311 is formed in the upper portion of the first sidewall 131. The opening area of the guide hole 1311 is no larger than the cross-sectional area of the outer valve body 130 in a direction perpendicular to the axial direction of the inner valve body 110. This allows the shielding portion 121 to be movable in the horizontal direction (i.e., perpendicular to the axial direction of the inner valve body 110) between the inner valve body 110 and the outer valve body 130 within the guide hole 1311. 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 mounted on the upper end of the first sidewall 131. The first top wall 132 is provided with an exhaust port 1321 that communicates with the outside world. The number of exhaust ports 1321 can be one or more and 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.

[0095] 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 part 140 and the movable part 120 contact and cooperate 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, 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, the limiting part 140 moves upward during the horizontal movement, thereby forming a gas circulation gap between the sealing part 150 and the limiting part 140 and the upper end face of the exhaust hole 211, and the gas circulation 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 circulation gap, the exhaust channel and the exhaust port 1321 on the outer valve body 130 in sequence.

[0096] In some embodiments, as 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,

[0097] 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 cooperate at the first position; in the fourth position state, the rod body 122 and the limiting member 140 are in contact and cooperate at the second position.

[0098] 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 block the second opening 112. The bottom of the first baffle 1211 is fitted with a 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.

[0099] The second baffle 1212 moves through the guide hole 1311 in an axial direction perpendicular to the inner valve body 110. The second baffle 1212 has a third position in which it extends out of the guide hole 1311 and a fourth position in which it retracts into the guide hole 1311. In the third position, the rod 122 and the stopper 140 contact and cooperate with each other in the first position, placing the exhaust valve 100 in a sealed state. In the fourth position, the rod 122 and the stopper 140 contact and cooperate with each other in the second position, placing the exhaust valve 100 in an exhaust state.

[0100] In some embodiments, as Figure 6 As shown, the first baffle 1211 and the second baffle 1212 are respectively configured to be fan-shaped, and an end surface of one of the two away from the other is an arc-shaped end surface 1213.

[0101] 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 changes, switching from the first position to the second position, thereby realizing forced exhaust of the exhaust valve 100.

[0102] In some embodiments, as Figure 22 As shown, the exhaust valve 100 further includes an exhaust pipe 160 , and the exhaust pipe 160 includes a second side wall 161 . The second side wall 161 is slidably mounted on the first side wall 131 and switches the second baffle 1212 from the third position to the fourth position.

[0103] Specifically, when the second baffle 1212 is in the third position, extending out of the guide hole 1311, if the gas-producing equipment requires exhaust, forced exhaust of the gas-producing equipment can be achieved through the exhaust pipe 160. Specifically, the exhaust pipe 160 is slidably mounted outside the outer valve body 130. The exhaust pipe 160 provides a thrust for the second baffle 1212 to move toward the interior of the outer valve body 130. The second baffle 1212 switches from the third position to the fourth position, causing the contact and engagement position between the rod body 122 and the limit member 140 to switch from the first position to the second position, thereby achieving forced exhaust of the exhaust valve 100. 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. A second top wall 162 may be provided at the top of the second side wall 161, or it may not be provided.

[0104] 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.

[0105] In some embodiments, as Figure 3 and Figure 15 As shown, a welding portion 1312 is provided at the lower end of the first side wall 131 close to the exhaust hole 211 .

[0106] 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.

[0107] In some embodiments, as Figure 3 and Figure 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 . The two ends of the elastic member 170 are fixedly connected to the rod body 122 and the inner valve body 110 respectively.

[0108] Specifically, an elastic member 170 is mounted on the side wall of the rod body 122 away from the second baffle 1212. The elastic member 170 may be a spring, with both ends of the elastic member 170 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 has completed exhausting, the elastic force of the elastic member 170 causes the rod body 122 and the limit member 140 to switch from contact and engagement in the second position to contact and engagement in the first position, providing a reset force for the rod body 122 and the limit member 140, enabling the reuse of the exhaust valve 100 and improving the utilization rate of the exhaust valve 100.

[0109] The second aspect of the present invention is as follows 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.

[0110] Specifically, the battery cover body 210 is provided with a vent hole 211, which can be a liquid injection hole for the battery. Through this vent hole 211, both the battery exhaust and the electrolyte injection operation can be performed. The vent valve 100 described in any embodiment of the present application is sealed and installed at the vent hole 211. This can not only ensure that the internal pressure of the battery does not increase excessively when gas is slowly produced by the battery, avoiding bulging and deformation caused by small amounts of gas production, but also provide a gentle exhaust method that will not damage the battery structure. It can also ensure that liquid is not discharged during exhaust, avoiding serious corrosion to the surrounding environment and equipment, improving the safety of the gas production equipment, and ensuring the performance of the gas production equipment.

[0111] 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.

[0112] A third aspect of the present invention provides a battery, wherein the battery includes the exhaust valve 100 described in any embodiment of the present application, or includes the battery cover assembly 200 described in any embodiment of the present application.

[0113] Specifically, the exhaust valve 100 can promptly discharge 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 will not be repeated in the embodiments of this application. Among them, the battery can be a lithium-ion battery, etc.

[0114] A fourth aspect of the present invention provides an electrical device, wherein the electrical device includes the battery described in any embodiment of the present application.

[0115] 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 this application.

[0116] It should be noted that electrical equipment may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, 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 utility model do not impose any special restrictions on the above-mentioned electrical equipment.

[0117] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this 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 for communicating 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 of contact and fit at a first position and a second state of 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 together so that the exhaust hole (211) is in a sealed state; 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 part (120) includes: a shielding portion (121) and a rod body (122), wherein 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) contacts and cooperates 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 limiting member (140) that are close to each other. In the first state, the apex of the first arc-shaped protrusion (1221) and the apex of the second arc-shaped protrusion (141) are in contact with each other; 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 with each other. 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 arranged to slide relative to each other. The first inclined surface (1224) and the second inclined surface (1421) have the same inclined direction, and the inclined 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) includes a first side wall (131) and a first top wall (132); a guide hole (1311) is provided on the first side wall (131); the shielding portion (121) is partially provided in the guide hole (1311) and can move 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).

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) that are fixedly connected, wherein the first baffle (1211) covers the second opening (112), and the second baffle (1212) is arranged in the guide hole (1311) and is movable in 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 fit at the first position; in the fourth position state, the rod body (122) and the limiting member (140) are in contact and fit 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 configured to be fan-shaped, and an end surface of one of the two that is away from the other is configured to be 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), and 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 switches the second baffle (1212) 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 assembled in the limiting groove (1222), and two ends of the elastic member (170) are fixedly connected to the rod body (122) and the inner valve body (110), respectively.

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

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