Exhaust valve and battery cover plate assembly

Abstract

The application discloses an exhaust valve and a battery cover plate assembly, the exhaust valve comprising an inner valve body, a movable element, an outer valve body and a limiting element, the inner valve body being provided with a first opening and a second opening, the first opening being used for communicating with an exhaust hole of a gas production device; the movable element being movably arranged at the second opening, and the movable element being partially covered on an upper end surface of the inner valve body and being gap-fitted with the inner valve body to form an exhaust passage; the outer valve body being sleeved outside the inner valve body, and an exhaust port of the outer valve body being communicated with the exhaust passage; the inner valve body being provided with a sealing element and a limiting element at the first opening; the movable element and the limiting element having a first state of contact-fitting at a first position, the limiting element and the sealing element being press-fitted to make the exhaust port in a sealed state; the limiting element and the sealing element being gap-fitted to make the exhaust hole and the exhaust passage in a communicated state at a second state of contact-fitting at a second position; and the first position being away from the exhaust hole relative to the second position. The exhaust valve can realize automatic gas discharge, and ensures that liquid is not discharged during exhaust.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of secondary battery safety, and particularly relates to an exhaust valve and a battery cover plate assembly. BACKGROUND

[0002] The capacity of the current secondary battery is increasing, and it needs to face the increasingly serious gas production problem inside. With the increase of the gas production inside the secondary battery, it will gradually cause the shell of the secondary battery to bulge and deform, and the internal gas pressure to be too large to explode.

[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 arranged on the cover plate assembly of the battery, but 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, gas pressure rising and the like caused by slow or small amount of gas production inside the secondary battery. The pressure relief valve will carry out part of the electrolyte while discharging the gas, which is easy to cause serious corrosion to the surrounding environment and equipment, resulting in that the battery cell cannot be used continuously. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, it is expected to provide an exhaust valve, a battery cover plate assembly, a battery and an electric equipment.

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

[0006] An inner valve body is arranged at the first opening and the second opening at the two ends in the axial direction, and the first opening is arranged in communication with the exhaust hole of the gas production equipment;

[0007] A movable piece is arranged at the second opening in the axial direction perpendicular to the inner valve body, and the movable piece is partially covered on the upper end surface of the inner valve body, and the movable piece and the inner valve body are gap-fitted to form an exhaust passage;

[0008] An outer valve body is fixedly sleeved outside the inner valve body, and an exhaust port is arranged on the outer valve body, and the exhaust port is arranged in communication with the exhaust passage;

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

[0010] The movable piece and the limiting piece have a first state of contact fitting at a first position and a second state of contact fitting at a second position, wherein, along the axial direction of the inner valve body, the first position is away from the exhaust hole relative to the second position; and in the first state, the limiting piece and the sealing piece are tightly fitted to make the exhaust hole in a sealed state; in the second state, the limiting piece and the sealing piece are gap-fitted to make the exhaust hole and the exhaust passage in a communication state.

[0011] In addition, the exhaust valve of the present application can further have the following additional technical features:

[0012] Preferably, the movable member comprises a shielding part and a rod, 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 extends through the second opening and is arranged towards the bottom side of the inner valve body, and the rod is in contact with the limiting member, the shielding part and the rod are both in clearance fit with the inner valve body to form the exhaust passage.

[0013] Preferably, the rod and the limiting member are respectively provided with a first arc-shaped protrusion and a second arc-shaped protrusion on the side close to each other, 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 in the second state, the side of the first arc-shaped protrusion and the side of the second arc-shaped protrusion are in contact.

[0014] Alternatively,

[0015] The rod and the limiting member are respectively provided with a first wedge-shaped head and a second wedge-shaped head on the side 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 arranged in opposite sliding manner, the inclined directions of the first inclined surface and the second inclined surface are the same, and the inclined directions are arranged in inclined manner relative to the axial direction of the inner valve body.

[0016] Preferably, the outer valve body comprises a first side wall and a first top wall, the first side wall is provided with a guide hole, the shielding part is partially arranged in the guide hole and can move in the axial direction perpendicular to the inner valve body, and the first top wall is arranged at the top end of the first side wall and is provided with the exhaust port.

[0017] Preferably, the shielding part comprises a first baffle and a second baffle connected fixedly, the first baffle covers the second opening, the second baffle is arranged in the guide hole and can move in the axial direction perpendicular to the inner valve body, and

[0018] The second baffle has a third position state of extending out of the guide hole and a fourth position state of extending into the guide hole, in the third position state, the rod and the limiting member are in contact at the first position, and in the fourth position state, the rod and the limiting member are in contact at the second position.

[0019] Preferably, the first baffle and the second baffle are respectively provided in the shape of a sector, and one side end surface of one of the two baffle plates away from the other baffle plate is provided in the shape of 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 set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be 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 3 A 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 perspective view of a limiting piece provided in an embodiment of the present application;

[0035] Figure 8 A perspective view of a limiting piece provided in an embodiment of the present application; Figure 7 A front view of the limiting piece provided in an embodiment of the present application;

[0036] Figure 9 A perspective view of an outer valve body provided in an embodiment of the present application;

[0037] Figure 10 A perspective view of an outer valve body provided in an embodiment of the present application; Figure 9 A top view of the outer valve body provided in an embodiment of the present application;

[0038] Figure 11 A front view of the outer valve body provided in an embodiment of the present application; Figure 9 A front view of the outer valve body provided in an embodiment of the present application;

[0039] Figure 12 A side view of the outer valve body provided in an embodiment of the present application; Figure 9 A side view of the outer valve body provided in an embodiment of the present application;

[0040] Figure 13 A perspective view of an inner valve body provided in an embodiment of the present application;

[0041] Figure 14 A front view of the inner valve body provided in an embodiment of the present application; Figure 13 A front view of the inner valve body provided in an embodiment of the present application;

[0042] Figure 15 Another structure view of the cooperation between the movable piece and the limiting piece provided in an embodiment of the present application;

[0043] Figure 16 A perspective view of another movable piece provided in an embodiment of the present application;

[0044] Figure 17 A perspective view of another limiting piece provided in an embodiment of the present application

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

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

[0047] Figure 20 A side view of a battery cover plate assembly provided in an embodiment of the present application; Figure 19 An enlarged view of a part A in the above figure;

[0048] Figure 21 A structure view of an exhaust valve in a sealing state;

[0049] Figure 22 A structure view of an exhaust valve in an exhaust state.

[0050] In the above figures:

[0051] 100 exhaust valve;

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

[0053] 120 movable element; 121 blocking part; 1211 first baffle; 1212 second baffle; 1213 arc-shaped end face;

[0054] 122 rod body; 1221 first arc-shaped protrusion; 1222 limiting groove; 1223 first wedge-shaped head; 1224 first inclined face; 1225 first vertical face; 1226 first horizontal face;

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

[0056] 140 limiting element; 141 second arc-shaped protrusion; 142 second wedge-shaped head; 1421 second inclined face; 1422 second vertical face; 1423 third inclined face;

[0057] 150 sealing element;

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

[0059] 170 elastic element;

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

[0061] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only parts related to the application are shown in the drawings for ease of description.

[0062] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

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

[0064] Unless the context clearly requires otherwise, throughout the description and the claims, the term "comprise", and variations thereof (such as "comprises" and "comprising"), will be construed to be inclusive, i.e., "including, but not limited to".

[0065] 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 the described implementation, implementation or example includes at least one implementation or example of the present disclosure. The above terms do not necessarily indicate the same implementation or example. In addition, the described specific features, structures, materials or characteristics can be included in any one or more embodiments or examples in any appropriate manner.

[0066] The terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "multiple" is two or more.

[0067] There are mainly two ways to solve the problem of gas production inside the secondary battery. One is to set a pressure relief valve on the battery cover plate assembly, which breaks when the internal thermal runaway gas pressure of the secondary battery reaches a certain threshold to form an exhaust port on the top cover plate for pressure relief, preventing the secondary battery from exploding due to excessive internal gas pressure. However, the pressure relief 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, gas pressure rise and the like caused by slow or small amount of gas production inside the secondary battery. In addition, the pressure relief valve is a disposable component that will damage the structure of the battery after it is used, so it has great limitations and still affects the safety of the secondary battery. The other is to increase the exhaust pressure relief valve. However, the existing pressure relief valve will carry out part of the electrolyte while discharging the gas, which is easy to cause serious corrosion to the surrounding environment and equipment, resulting in the battery cell cannot be used continuously.

[0068] To solve the above technical problems, as shown in Figures 1 to 17 The first aspect of the present application provides an exhaust valve 100, comprising:

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

[0070] A movable element 120 is arranged at the second opening 112 of the inner valve body 110 and moves along the axial direction of the inner valve body 110, and the movable element 120 partially covers the upper end surface of the inner valve body 110 and forms an exhaust passage in cooperation with the inner valve body 110 with a gap;

[0071] An outer valve body 130 is fixedly arranged outside the inner valve body 110, and the outer valve body 130 is provided with an exhaust port 1321 which is arranged in communication with the exhaust passage;

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

[0073] The movable element 120 and the limiting element 140 have a first state of contact cooperation at a first position and a second state of contact cooperation at a second position, wherein the first position is away from the exhaust hole 211 relative to the second position along the axial direction of the inner valve body 110; and in the first state, the limiting element 140 is in compression cooperation with the sealing element 150 to make the exhaust hole 211 in a sealed state; in the second state, the limiting element 140 is in gap cooperation with the sealing element 150 to make the exhaust hole 211 in a communication state with the exhaust passage.

[0074] Specifically, referring to Figures 13-14 and Figures 21-22 The inner valve body 110 has a hollow cavity structure with two ends through which the first opening 111 and the second opening 112 are arranged along the axial direction, wherein the first opening 111 is located at the lower end of the inner valve body 110 and is arranged in communication with the exhaust hole 211 of the gas generating device, and the diameter of the first opening 111 is at least greater than the area of the exhaust hole 211; the upper end of the inner valve body 110 has a reverse circular platform structure, and the second opening 112 is arranged on the reverse circular platform structure, and the diameter of the second opening 112 is smaller than the diameter of the first opening 111, so as to facilitate the movable element 120 to be arranged above the second opening 112. The exhaust hole 211 of the gas generating device 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 realize exhaust and perform electrolyte injection operation.

[0075] The inner valve body 110 is movably provided with a movable element 120 at the second opening 112, which moves horizontally along the axial direction of the valve body, and the movable element 120 is in gap cooperation with the upper end surface of the inner valve body 110 at the second opening 112 to form an exhaust passage, i.e., the inner and outer sides of the inner valve body 110 are communicated through the gap between the movable element 120 and the inner valve body 110, and the gas in the hollow cavity of the inner valve body 110 flows to the outer side of the inner valve body 110 through the exhaust passage.

[0076] The outer valve body 130 is sleeved on the outer side of the inner valve body 110, and the two are fixedly connected. The outer valve body 130 is provided with at least one exhaust port 1321 on the top wall opposite to the second opening 112, which is communicated with the outside. The exhaust port 1321 can be multiple, and the multiple exhaust ports 1321 are uniformly distributed on the top wall of the outer valve body 130, which is convenient for controlling the gas in the battery to be discharged in uniform flow. For example, the number of exhaust ports 1321 is 2, 3, 4, etc.

[0077] The inner valve body 110 is provided with a sealing element 150 at the first opening 111 and on the upper surface of the exhaust hole 211. The sealing element 150 can be a sealing gasket, such as a rubber gasket, etc., which has the ability to be compressed and deformed. The inner valve body 110 is provided with a limiting element 140 between the sealing element 150 and the movable element 120. The contact position of the limiting element 140 and the movable element 120 is adjusted based on the working state (including the sealing state and the exhaust state) of the exhaust valve 100.

[0078] In the sealing state of the exhaust valve 100, the movable element 120 and the limiting element 140 are in contact at the first position, and the limiting element 140 applies downward pressure to the sealing element 150, which deforms and presses the sealing element 150 to the upper end surface of the exhaust hole 211, so that the limiting element 140, the sealing element 150 and the upper end surface of the exhaust hole 211 are in close cooperation. The exhaust hole 211 is sealed by the cooperation of the limiting element 140 and the sealing element 150, avoiding the communication between the exhaust hole 211 and the exhaust passage in the inner valve body 110, and ensuring the sealing performance of the gas production equipment.

[0079] In the exhaust state, the gas generated by the gas generating device can be discharged upward through the exhaust hole 211, pushing the limiting piece 140 to move upward, and further switching the contact and cooperation position of the limiting piece 140 and the movable piece 120 from the first position to the second position. In the process of moving upward, the limiting piece 140 releases the pressure applied to the sealing piece 150, and the gas flow gap is formed between the limiting piece 140 and the sealing piece 150, and between the sealing piece 150 and the upper end surface of the exhaust hole 211. The gas flow gap is in communication with the exhaust passage in the inner valve body 110, so that the gas discharged by the gas generating device can 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 arranged 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. The distance deviation of 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. Because part of the movable piece 120 covers the upper end surface of the inner valve body 110 at the second opening 112, the gas discharged by the gas generating device can only be discharged outward through the gap between the movable piece 120 and the inner valve body 110, and the liquid is blocked by the movable piece 120 and flows into the hollow cavity structure of the inner valve body 110, avoiding the serious corrosion of the liquid to the surrounding environment and the equipment, and improving the use safety of the gas generating device. The liquid discharged by the gas generating device can be electrolyte and the like.

[0080] The exhaust valve 100 provided by the embodiment of the present application has a simple structure, which can not only ensure that the internal pressure of the gas generating device does not excessively increase when the gas generating device slowly generates gas, avoid the bulging and deformation problem caused by the small amount of gas generated by the gas generating device, and gently discharge the gas without damaging the structure of the gas generating device, but also ensure that the liquid is not discharged during the exhaust, avoid the serious corrosion of the liquid to the surrounding environment and the equipment, improve the safety of the gas generating device, and ensure the use performance of the gas generating device.

[0081] In some embodiments, as shown in Figures 4 to 6 The movable piece 120 includes a shielding part 121 and a rod body 122. The shielding part 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 extends through the second opening 112 and is arranged towards the bottom side of the inner valve body 110. The rod body 122 is in contact and cooperation with the limiting piece 140. The shielding part 121 and the rod body 122 are both in gap cooperation with the inner valve body 110 to form the exhaust passage.

[0082] Specifically, the shielding part 121 is vertically fixedly connected with the rod body 122, the shielding part 121 is arranged between the upper end surface of the inner valve body 110 and the top wall of the outer valve body 130 in a left-right horizontal movement perpendicular to the axial direction of the inner valve body 110, and the shielding part 121 drives the rod body 122 to move left and right horizontally in the inner valve body 110 in the left-right horizontal movement process, and the rod body 122 always keeps in contact with the limiting part 140 in the horizontal movement process. The area of the shielding part 121 is greater 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 part 121 and the rod body 122 are both in clearance fit with the inner valve body 110, so that the inner valve body 110 forms an internal and external communication exhaust passage at the second opening 112, and effectively blocks the liquid at the same time of exhausting, avoiding the liquid from being discharged out of the exhaust valve 100.

[0083] In some embodiments, the rod body 122 and the limiting part 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, 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; 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.

[0084] Alternatively,

[0085] The rod body 122 and the limiting part 140 are respectively provided with a first wedge-shaped head 1223 and a second wedge-shaped head 142 on one side 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 in opposite sliding manner, 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.

[0086] Specifically, the rod body 122 and the limiting part 140 have two contact cooperation structures, one 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 piece 140 are provided with matched first and second wedge-shaped heads 1223 and 142 on the side close to each other, wherein the first wedge-shaped 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-shaped head 142; the second wedge-shaped 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-shaped head 1223, the first inclined surface 1224 and the second inclined surface 1421 are arranged in the same inclined direction and are 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 in parallel with 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 arranged inclined relative to the first horizontal surface 1223.

[0090] In the first state, the first inclined surface 1224 of the first wedge-shaped head 1223 and the second inclined surface 1421 of the second wedge-shaped head 142 are completely matched and in contact, the limiting piece 140 applies downward pressure to the sealing piece 150, the sealing piece 150 deforms, and the sealing piece 150 is pressed to the upper end surface of the exhaust hole 211 of the gas production equipment, so that the limiting piece 140, the sealing piece 150 and the upper end surface of the exhaust hole 211 are in close fit, so that the exhaust valve 100 is in a sealed state, realizing the sealing effect of the exhaust hole 211 and ensuring the sealing performance of the gas production equipment.

[0091] In the second state, the gas produced by the gas production equipment is discharged outward through the exhaust hole 211 and pushes the limiting piece 140 upward, 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 limiting piece 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, the sealing piece 150 is contracted in the horizontal direction, and at the same time, a gap is generated between the sealing piece 150 and the limiting piece 140 and the upper end surface of the exhaust hole 211 along the axial direction of the inner valve body 110, which communicates with the exhaust passage and the exhaust port 1321 of the outer valve body 130, so that the gas produced by the gas production equipment is discharged to the outside through the exhaust valve 100.

[0092] It can be understood that the two contact and fit structures of the rod body 122 and the limiting piece 140 can realize automatic exhaust of the gas production equipment, avoid the problems of bulging and deformation caused by a small amount of gas production of the gas production equipment, and the exhaust mode is gentle and will not damage the structure of the gas production equipment. Figure 22As shown, the flow direction of the exhaust gas is as follows: the gas generated in the gas generating device is first discharged through the exhaust hole 211, flows through the gap between the sealing member 150, the limiting 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 shown in 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 part 121 is partially arranged in the guide hole 1311 and moves along the axial direction perpendicular to the inner valve body 110, and the first top wall 132 is arranged at the top end of the first side wall 131 and is provided with the exhaust port 1321.

[0094] Specifically, the first side wall 131 is fixedly sleeved on the side wall of the inner valve body 110, the upper part of the first side wall 131 is provided with a penetrating guide hole 1311, and the opening area of the guide hole 1311 along the axial direction perpendicular to the inner valve body 110 is not greater than the cross-sectional area of the outer valve body 130, so that the blocking part 121 can be movably arranged in the guide hole 1311 between the inner valve body 110 and the outer valve body 130 along the horizontal direction (i.e. the axial direction perpendicular to the inner valve body 110), the movable part 120 can be extended out of the outer valve body 130 through the guide hole 1311 or can be retracted into the outer valve body 130 through the guide hole 1311. The upper end of the first side wall 131 is fixedly provided with the first top wall 132, the first top wall 132 is provided with the exhaust port 1321 which is in communication with the outside, and the exhaust port 1321 is one or more and can be arranged according to actual needs. Wherein, the first side wall 131 can be a circular side wall or a square side wall, and the corresponding first top wall 132 is a circular top wall or a square top wall, and the first side wall 131 and the first top wall 132 can also be other shapes, which are not particularly limited in the embodiments of the 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 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, the cross-sectional area of the first baffle 1211 is larger than the area of the second opening 112, the first baffle 1211 can block the second opening 112, and the bottom of the first baffle 1211 is in clearance fit with the upper end surface of the inner valve body 110, the clearance is in communication with the exhaust passage in the inner valve body 110, so that the gas can be discharged out of the inner valve body 110 through the clearance, and the liquid in the battery cannot be discharged out of the inner valve body 110 through the clearance due to the blocking of the first baffle.

[0099] The second baffle 1212 moves through the guide hole 1311 in the axial direction perpendicular to the inner valve body 110, and the second baffle 1212 has a third position state of extending out of the guide hole 1311 and a fourth position state of retracting into the guide hole 1311. In the third position state, the rod body 122 is in contact fit with the limiting piece 140 at the first position, so that the exhaust valve 100 is in a sealed state; in the fourth position state, the rod body 122 is in contact fit with the limiting piece 140 at the second position, so that the exhaust valve 100 is in an exhaust state.

[0100] In some embodiments, as shown in FIG. 1, the first baffle 1211 and the second baffle 1212 are respectively arranged as a fan shape, and one side end surface of one of the two baffles away from the other is an arc-shaped end surface 1213. Figure 6

[0101] Specifically, the first baffle 1211 and the second baffle 1212 can be fan-shaped baffles or irregularly shaped baffles, which are not particularly limited in the present application, and the fan-shaped baffles are preferably adopted. One side end surface of the second baffle 1212 extending out of the guide hole 1311 is an arc-shaped end surface 1213, which facilitates the application of a pushing force to the second baffle 1212 in the axial direction perpendicular to the inner valve body 110, and the pushing force makes the second baffle 1212 move towards the inside of the outer valve body 130, so that the contact fit position of the rod body 122 and the limiting piece 140 changes from the first position to the second position, and the forced exhaust of the exhaust valve 100 is realized.

[0102] In some embodiments, as shown in FIG. 1, the exhaust valve 100 further comprises an exhaust pipe 160, and the exhaust pipe 160 comprises a second side wall 161 which is slidably sleeved on the first side wall 131 and makes the second baffle 1212 switch from the third position state to the fourth position state. Figure 22

[0103] ​​Specifically, when the second baffle 1212 is in the third position state of extending out of the guide hole 1311, if the gas production equipment has a gas exhaust requirement, forced gas exhaust of the gas production equipment can be achieved through the exhaust pipe 160, specifically: the exhaust pipe 160 is sleeved on the outer valve body 130, the exhaust pipe 160 provides a pushing force for the second baffle 1212 to move to the inside of the outer valve body 130, the second baffle 1212 is switched from the third position state to the fourth position state, so that the contact position of the rod body 122 and the limiting piece 140 is switched from the first position to the second position, and forced gas exhaust of the exhaust valve 100 is achieved. Wherein, the shape of the second side wall 161 is the same as the shape 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 slidingly assembled. The top end of the second side wall 161 can also be provided with a second top wall 162, or can not be provided with a second top wall 162.

[0104] It should be noted that although the first side wall 131 of the outer valve body 130 is provided with a guide hole 1311, during the forced gas exhaust process of the exhaust valve 100, the guide hole 1311 is blocked by the exhaust pipe 160, 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 shown in Figure 3 and Figure 15 The first side wall 131 is provided with a welding portion 1312 near the lower end of the exhaust hole 211.

[0106] Specifically, the outer valve body 130 can be sealingly 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 shown in Figure 3 and Figure 15 The side wall of the rod body 122 is provided with a limiting groove 1222, the limiting groove 1222 is assembled with an elastic piece 170, and the two ends of the elastic piece 170 are fixedly connected with the rod body 122 and the inner valve body 110, respectively.

[0108] Specifically, the elastic member 170 is installed on the side wall of the rod body 122 away from the second baffle 1212, and the elastic member 170 can be a spring, and the two ends of the elastic member 170 are fixedly connected with the side wall of the rod body 122 and the inner wall of the inner valve body 110. In the first state of the exhaust valve 100 in the sealed state, the elastic member 170 is in a natural extension state; in the second state of the exhaust valve 100 in the 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 makes the rod body 122 and the limiting member 140 switch from contact cooperation in the second position to contact cooperation in the first position, providing a reset force of the rod body 122 and the limiting member 140, realizing reuse of the exhaust valve 100, and improving the utilization rate of the exhaust valve 100.

[0109] The second aspect of the application, as shown in Figures 18 to 22 The battery cover plate assembly 200 provided by the application comprises a cover plate body 210, and the cover plate body 210 is provided with the exhaust hole 211, and the exhaust hole 211 is provided with the exhaust valve 100 of any of the embodiments of the application.

[0110] Specifically, the cover plate body 210 of the battery is provided with the exhaust hole 211, and the exhaust hole 211 can be a liquid injection hole of the battery. Through the exhaust hole 211, the battery can be exhausted, and the electrolyte injection operation of the battery can also be performed. The exhaust valve 100 of any of the embodiments of the application is sealingly installed at the exhaust hole 211, which can ensure that the internal pressure does not rise excessively when the battery slowly produces gas, avoid the bulging and deformation problem caused by the small amount of gas produced by the battery, and the exhaust method is gentle and will not damage the structure of the battery; and 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 use performance of the gas production equipment.

[0111] It should be noted that the specific technical features and technical effects of the battery cover plate assembly 200 provided by the embodiments of the application are consistent with those of the exhaust valve 100, and the embodiments of the application will not be repeated.

[0112] The third aspect of the application provides a battery, which comprises the exhaust valve 100 of any of the embodiments of the application or the battery cover plate assembly 200 of any of the embodiments of the application.

[0113] Specifically, the exhaust valve 100 can timely discharge the gas produced by the electrolyte reaction in the battery cell, and stabilize the internal gas pressure of the battery cell. The specific technical features and technical effects of the battery are consistent with those of the exhaust valve 100, and the embodiments of the application will not be repeated. The battery can be a lithium ion battery.

[0114] In a fourth aspect, the present application provides a power consuming device comprising the battery according to any of the embodiments of the present application.

[0115] Specifically, the technical features and effects of the power consuming device are consistent with those of the exhaust valve, and thus will not be repeated.

[0116] It should be noted that the power consuming device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or an extended range automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a stationary or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, etc. The embodiments of the present application do not specially limit the above power consuming devices.

[0117] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. Those skilled in the art should understand that the scope of the application disclosed in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with other technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

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, and the exhaust hole (211) is a liquid injection hole; 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 of the rod body (122) and the limiting member (140) that 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 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) 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 invention comprises a cover plate body (210), wherein 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).

Images