Exhaust valve and battery cover plate assembly

Abstract

The exhaust valve comprises a valve body, a first sealing piece and a valve bonnet, the valve body is detachably assembled at an exhaust port of gas production equipment, the valve body comprises a first hollow cavity, a first opening and a second opening which are communicated with the first hollow cavity are formed in the two ends of the valve body in the axial direction, and the first opening and the second opening are communicated with the first hollow cavity. The first opening penetrates through the gas release opening and is communicated with the interior of the gas production equipment; the first sealing piece is arranged outside the valve body at the second opening; the valve bonnet covers the first sealing piece, is in abutting fit with the valve body and is in clamping fit with the valve body, an exhaust port is formed in the valve bonnet in a penetrating mode, and the exhaust port, the second opening and the first opening are communicated to form an exhaust channel; the exhaust valve has a first sealing state and a second exhaust state, and in the first state, the first sealing piece is in sealing fit with the valve body; and in the second state, the first sealing piece is in clearance fit with the valve body. 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 secondary battery safety technical field, concretely relates to a kind of exhaust valve and battery cover plate assembly. BACKGROUND

[0002] The demand and capacity of current secondary battery are increasing, which needs to face the increasingly serious gas production problem inside. With the increase of gas production inside secondary battery, if it cannot be discharged in time, it will gradually lead to the deformation of secondary battery bulging, and in serious cases, the internal gas pressure is too large to have the risk of explosion.

[0003] To solve the problem of gas production inside secondary battery, generally set up explosion-proof valve on the cover plate assembly of battery, when the internal thermal runaway gas pressure of secondary battery reaches a certain threshold, the explosion-proof valve breaks to form an exhaust port on the top cover plate to release pressure, to prevent the internal gas pressure of secondary battery from being too large to explode. But explosion-proof valve mainly plays a role when a large amount of gas is produced inside secondary battery, and cannot solve the problems of bulging, deformation, gas pressure rising and other problems caused by slow or small amount of gas production inside secondary battery, and explosion-proof valve is a disposable component, which will damage the structure of battery after its role, so it has great limitations, and still affects the safety of secondary battery. SUMMARY

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

[0005] The first aspect of the utility model provides an exhaust valve, comprising:

[0006] Valve body, the valve body includes first hollow cavity, the valve body is provided with first opening and second opening communicated with the first hollow cavity at both ends along the axial direction;

[0007] First sealing element, the first sealing element is arranged outside the valve body at the second opening;

[0008] Valve cap, the valve cap is covered on the first sealing element, and is matched with the valve body, the valve cap is provided with exhaust port, the exhaust port, the second opening and the first opening are communicated to form exhaust passage;

[0009] The exhaust valve has sealed first state and exhaust second state, in the first state, one end of the first sealing element is in top stop cooperation with the valve cap, the other end of the first sealing element is in sealing cooperation with the valve body, so that the second opening and the exhaust port are in disconnected state;In the second state, one end of the first sealing element is in top stop cooperation with the valve cap, the other end of the first sealing element is compressed and deformed and is in clearance cooperation with the valve body, so that the second opening and the exhaust port are in conductive state.

[0010] The exhaust valve has simple structure, can ensure that the internal pressure does not excessively increase when the gas production equipment slowly produces gas, avoids the problems of bulging and deformation caused by small gas production of the gas production equipment, and gently exhausts without damaging the structure of the gas production equipment.

[0011] In addition, the exhaust valve can have the following additional technical features.

[0012] Preferably, the first sealing member comprises a circular top wall and a conical side wall, the circular top wall and the conical side wall form a circular truncated cone structure, the circular top wall is in top abutment with the valve cap, and the conical side wall is in sealing or clearance fit with the first sealing member.

[0013] Preferably, the circular top wall is provided with a positioning column or a positioning groove at one end surface away from the conical side wall, the valve cap is correspondingly provided with a positioning hole or a positioning protrusion, and the positioning column and the positioning hole or the positioning groove are in axial plug fit with the positioning protrusion along the valve body.

[0014] Preferably, the conical side wall is provided with at least one ring of recesses in an annular shape perpendicular to the axial direction of the valve body.

[0015] Preferably, one end of the conical side wall away from the circular top wall has a circular port, and a projection of the circular port along the axial direction of the valve body covers at least a projection of the second opening along the axial direction of the valve body.

[0016] The circular top wall and the exhaust port are staggered or partially overlapped in the axial direction perpendicular to the valve body.

[0017] Preferably, the valve body comprises a base body portion, and the base body portion has the first hollow cavity therein.

[0018] The bottom end of the base body portion is provided with a first clamping jaw portion extending away from the first hollow cavity in the axial direction perpendicular to the valve body, and the first clamping jaw portion and the base body portion form the first opening.

[0019] The top end of the base body portion is provided with a support portion extending away from the first hollow cavity in the axial direction perpendicular to the valve body, and the second opening is formed in the support portion.

[0020] Preferably, the inner wall surface of the first hollow cavity at the second opening is inclined away from the first hollow cavity in the axial direction perpendicular to the valve body to form a first chamfer structure; or / and,

[0021] The support portion is arranged obliquely from a side end face close to the first sealing member to a side of the valve body away from the first hollow cavity in an axial direction of the valve body to form a second chamfer structure; or / and,

[0022] The first clamping jaw portion is provided with a third chamfer structure away from a side end face of the base portion.

[0023] Preferably, the base portion is circumferentially provided with at least one opening communicating with the first hollow cavity, each of the openings extends from a bottom end of the first clamping jaw portion to a top end of the base portion in the axial direction of the valve body, the length of the opening is greater than 1 / 3 of the length of the base portion and less than the length of the base portion.

[0024] Preferably, the valve cap comprises a valve wall, the valve wall encloses to form a second hollow cavity, a valve cover is arranged at a top end of the valve wall, the valve cover covers the second hollow cavity and is in top stop cooperation with the first sealing member; a bottom end of the valve wall extends along a direction perpendicular to the axial direction of the valve body and towards a side close to the first hollow cavity to form a second clamping jaw portion, the second clamping jaw portion is in clamping cooperation with a side wall of the support portion away from the first sealing member.

[0025] In a second aspect, the utility model provides a battery cover plate assembly, including the cover plate body, be provided with the air release opening on the cover plate body, the air release opening is detachably provided with the exhaust valve of any embodiment of the application, the first opening passes through the air release opening and is provided with the inside communication of gas production equipment.

[0026] Preferably, the base portion is in interference fit with the inner wall surface of the air release opening, the base portion is assembled at the air release opening, and the first clamping jaw portion and the support portion are respectively in abutting fit with the two side walls of the gas production equipment at the air release opening in the axial direction of the valve body.

[0027] Preferably, the exhaust valve further comprises a second sealing member, the second sealing member is annular and arranged outside the side wall of the base portion, and the support portion is in abutting fit with the corresponding side wall of the gas production equipment through the second sealing member close to the side wall of the base portion.

[0028] Preferably, when the support portion is in abutting fit with the corresponding side wall of the gas production equipment through the second sealing member, the second sealing member is in compression state, and the compression amount of the second sealing member in the axial direction of the valve body accounts for 20% to 50% of the thickness of the second sealing member.

[0029] In a third aspect, the utility model provides a battery comprising the battery cover plate assembly of any embodiment of the application.

[0030] In a fourth aspect, the utility model provides an electric equipment comprising the battery of any embodiment of the application.

[0031] Additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0032] Other characteristics, objects and advantages of the present application will become more apparent from the detailed description of non-restrictive embodiments made with reference to the attached drawings, in which:

[0033] Figure 1 The three-dimensional structure view of the exhaust valve provided for the embodiment of the present application is provided;

[0034] Figure 2 The exploded view of the exhaust valve provided for the embodiment of the present application is provided;

[0035] Figure 3 The sectional view of the exhaust valve provided for the embodiment of the present application is provided;

[0036] Figure 4 The three-dimensional structure view of the first sealing member provided for the embodiment of the present application is provided;

[0037] Figure 5 The top view of the first sealing member provided for the embodiment of the present application is provided; Figure 4

[0038] The lateral sectional view of the first sealing member provided for the embodiment of the present application is provided; Figure 6 Figure 4 The three-dimensional structure view of the valve body provided for the embodiment of the present application is provided;

[0039] Figure 7 The lateral sectional view of the valve body provided for the embodiment of the present application is provided;

[0040] Figure 8 Figure 7 The top view of the valve body provided for the embodiment of the present application is provided;

[0041] Figure 9 The bottom view of the valve body provided for the embodiment of the present application is provided; Figure 7

[0042] The three-dimensional structure view of the valve cap provided for the embodiment of the present application is provided; Figure 10 Figure 7 The lateral sectional view of the valve cap provided for the embodiment of the present application is provided;

[0043] Figure 11 The top view of the valve cap provided for the embodiment of the present application is provided;

[0044] Figure 12 Figure 11 The bottom view of the valve cap provided for the embodiment of the present application is provided;

[0045] Figure 13 The bottom view of the valve cap provided for the embodiment of the present application is provided; Figure 11 ​​​​​

[0046] Figure 14 Provided is a bottom view of the valve cap; Figure 11

[0047] Figure 15 Provided is a top view of the battery cover plate assembly of the embodiment of the present application;

[0048] Figure 16 Provided is a side sectional view of the battery cover plate assembly of the embodiment of the present application;

[0049] Figure 17 Provided is a bottom view of the valve cap; Figure 16

[0050] Figure 18 Provided is a structural view of the exhaust valve in a sealed state (the second sealing member is not shown);

[0051] Figure 19 Provided is a structural view of the exhaust valve in an exhaust state.

[0052] In the above figures:

[0053] 100 exhaust valve;

[0054] 110 valve body; 111 base portion; 1110 first hollow cavity; 1111 opening; 112 first clamping jaw portion; 1120 first opening; 113 support portion; 1130 second opening; 1131 first chamfer structure; 1132 second chamfer structure;

[0055] 120 first sealing member; 121 circular top wall; 1210 positioning column; 122 conical side wall; 1220 recessed portion;

[0056] 130 valve cap; 1301 second hollow cavity; 131 valve wall; 132 valve cover; 1320 exhaust port; 1321 positioning hole; 133 second clamping jaw portion;

[0057] 140 second sealing member;

[0058] 200 battery cover plate assembly; 210 cover plate body; 211 vent port; 212 recess; 213 positive electrode post; 214 negative electrode post; 215 explosion-proof valve. DETAILED DESCRIPTION

[0059] The present application will be further described in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended to serve only as an explanation of the present application and are not intended to limit the present application. In addition, it should be noted that only parts related to the present application are shown in the accompanying drawings for ease of description. ​​

[0060] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0061] The terms used in the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. As used in the specification and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0062] Unless otherwise required by context, the term "include" as used in the specification and the claims is to be construed as open, inclusive, meaning "including but not limited to".

[0063] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to mean that a particular feature, structure, material or characteristic included in at least one embodiment or example of the present disclosure. The above terms are not necessarily indicative of the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner.

[0064] The terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of 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.

[0065] As Figures 1 to 14 As shown in the first aspect of the utility model, provide a exhaust valve 100, including:

[0066] The valve body 110 is detachably assembled to the gas outlet 211 of the gas production equipment, the valve body 110 includes a first hollow cavity 1110, and the first opening 1120 and the second opening 1130 in communication with the first hollow cavity 1110 are arranged at the two ends of the valve body 110 along the axial direction, and the first opening 1120 passes through the gas outlet 211 and is arranged in communication with the inside of the gas production equipment.

[0067] The first sealing member 120 is arranged outside the valve body 110 at the second opening 1130.

[0068] A valve cap 130 is provided on the first seal 120 and is connected with the valve body 110, and an exhaust port 1320 is provided on the valve cap 130, the exhaust port 1320, the second opening 1130 and the first opening 1120 form an exhaust passage;

[0069] The exhaust valve 100 has a sealed first state and an exhaust second state, in the first state, one end of the first seal 120 is in abutting connection with the valve cap 130, and the other end of the first seal 120 is in sealing connection with the valve body 110, so that the second opening 1130 and the exhaust port 1320 are in a disconnected state; in the second state, one end of the first seal 120 is in abutting connection with the valve cap 130, and the other end of the first seal 120 is in gap connection with the valve body 110, so that the second opening 1130 and the exhaust port 1320 are in a connected state.

[0070] Specifically, the valve body 110 has a first hollow cavity 1110 penetrating through both ends, and the first hollow cavity 1110 is in communication with the first opening 1120 and the second opening 1130 at both axial ends, the first opening 1120 is located at the lower end of the valve body 110 and is in communication with the inside of the gas generating device; the upper end of the valve body 110 has the second opening 1130, which is in communication with the first opening 1120 through the first hollow cavity 1110. Wherein, the exhaust port 211 of the gas generating device can be the liquid injection hole of the battery, such as the liquid injection hole of the lithium ion battery, through which the battery can be exhausted and the electrolyte injection operation of the battery can be performed.

[0071] The valve cap 130 has a second hollow cavity 1301 inside, and the lower end has an opening end in communication with the second hollow cavity 1301, which allows the valve cap 130 to be slidably sleeved into the outside of the valve body 110, and the valve cap 130 is connected with the valve body 110, at this time, the second opening 1130 is in communication with the second hollow cavity 1301 and the first hollow cavity 1110. The valve cap 130 is provided with an exhaust port 1320 in communication with the second hollow cavity 1301 and the outside, the exhaust port 1320, the second opening 1130 and the first opening 1120 form an exhaust passage.

[0072] A mounting gap is reserved between the valve body 110 and the valve cap 130, and the first seal 120 is arranged in the mounting gap, such as Figure 17As shown, while the valve body 110 and the valve cap 130 are clamped and fixedly connected, the upper end of the first sealing member 120 is in abutting contact with the lower surface of the top wall of the valve cap 130, and the lower end of the first sealing member 120 is in sealing contact with the upper surface of the top wall of the valve body 110, that is, when the first sealing member 120 is subjected to the pressure of the fastening of the valve body 110 and the valve cap 130, the lower end of the first sealing member 120 will be deformed to a certain extent, so that the first sealing member 120 is tightly attached to the valve body 110, and then the second opening 1130 is sealed by the first sealing member 120, so that the exhaust valve 100 is in a sealed state, and the gas discharged from the gas production equipment through the exhaust port 211 cannot be discharged outward through the second opening 1130.

[0073] As shown in FIG. 1, the exhaust valve 100 is in a sealed state, and the gas produced by the gas production equipment cannot be discharged outward through the first opening 1120, the first hollow cavity 1110, the second opening 1130, and the second hollow cavity 1301. Figure 19 As shown, in the exhaust state of the exhaust valve 100, the gas produced by the gas production equipment can pass through the first opening 1120, the first hollow cavity 1110, and the second opening 1130, and push the first sealing member 120 by using the exhaust pressure, so that the upper end of the first sealing member 120 is in abutting contact with the valve body 110, the lower end of the first sealing member 120 is compressed and deformed and is in clearance fit with the valve body 110, and then the second opening 1130 is in communication with the second hollow cavity 1301 and the exhaust port 1320, so that the gas produced by the gas production equipment can be discharged to the outside through the exhaust port 1320, the pressure inside the gas production equipment is released, and the safety of the gas production equipment is improved. When the pressure inside the gas production equipment is restored, the first sealing member 120 can seal the second opening 1130 again, so that the exhaust valve 100 is in a sealed state.

[0074] It can be understood that, in the process of exhausting, due to the blocking of the first sealing member 120, the clearance between the first sealing member 120 and the valve body 110 only allows the gas to pass through, and the liquid is blocked in the first hollow cavity 1110 of the valve body 110, thereby avoiding that the liquid causes serious corrosion to the surrounding environment and equipment, and improving the safety of the gas production equipment. The liquid discharged from the gas production equipment can be electrolyte or the like.

[0075] The exhaust valve 100 provided by the embodiment of the present application has a simple structure, can ensure that the internal pressure of the gas production equipment does not excessively increase when the gas production equipment slowly produces gas, avoid the swelling and deformation problem caused by the small amount of gas produced by the gas production equipment, and has a gentle exhaust manner and will not damage the structure of the gas production equipment; can also ensure that the liquid is not discharged during exhausting, 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.

[0076] In some embodiments, as shown in FIG. 1, the exhaust valve 100 includes a valve body 110, a valve cap 130, a first sealing member 120, and a second sealing member 121. Figures 3 to 6As shown, the first sealing member 120 includes a circular top wall 121 and a conical side wall 122, which constitute a circular truncated cone structure, the circular top wall 121 is in top stop cooperation with the bonnet 130, and the conical side wall 122 is in sealing cooperation or clearance cooperation with the first sealing member 120.

[0077] Specifically, the circular top wall 121 and the conical side wall 122 constitute a circular truncated cone first sealing member 120, wherein the circular top wall 121 and the conical side wall 122 can be integrally arranged or separately arranged, and are both made of rubber elastic material, and the conical side wall 122 has the ability to be compressed and deformed, and the lower end of the conical side wall 122 can be compressed and deformed to form a certain degree of flange when the valve body 110 and the bonnet 130 are fastened, and the flange can be tightly attached to the valve body 110. In the first state, the circular top wall 121 is in top stop cooperation with the bonnet 130, and the lower end of the conical side wall 122 is compressed and sealed with the valve body 110; in the second state, the circular top wall 121 is in top stop cooperation with the bonnet 130, and the lower end of the conical side wall 122 is deformed under the pressure of the gas discharged from the air vent 211, and the lower end of the conical side wall 122 is in clearance cooperation with the valve body 110, so that the exhaust valve 100 is in the exhaust state.

[0078] In this example, the first sealing member 120 is in sealing cooperation with the valve body 110 to make the second opening 1130 and the exhaust port 1320 in a disconnected state, so that the exhaust valve 100 is in a sealed state, ensuring the sealing performance of the gas production equipment; and the first sealing member 120 is in clearance cooperation with the valve body 110 to make the second opening 1130 and the exhaust port 1320 in a connected state, so that the exhaust valve 100 is in an exhaust state, so as to discharge the gas generated by the gas production equipment.

[0079] In some embodiments, as shown in Figures 3 to 6 As shown, the side end face of the circular top wall 121 away from the conical side wall 122 is provided with a positioning column 1210 or a positioning groove, and the bonnet 130 is correspondingly provided with a positioning hole 1321 or a positioning protrusion, and the positioning column 1210 and the positioning hole 1321 or the positioning groove and the positioning protrusion are in axial plug-in cooperation along the valve body 110.

[0080] Specifically, when the bonnet 130 is in clamping cooperation with the valve body 110, the positioning column 1210 of the first sealing member 120 can be fitted into the positioning hole 1321 of the bonnet 130 to realize the axial plug-in cooperation of the two along the valve body 110, or the positioning protrusion of the bonnet 130 can be fitted into the positioning groove of the first sealing member to realize the axial plug-in cooperation of the two along the valve body 110, thereby improving the accuracy and firmness of the positioning and installation of the first sealing member 120 and the bonnet 130.

[0081] In some embodiments, as shown inFigures 3 to 6 As shown, the conical side wall 122 is provided with at least one ring of recesses 1220 in the annular direction perpendicular to the axial direction of the valve body 110.

[0082] Specifically, the recesses 1220 are annularly arranged on the conical side wall 122, so that the conical side wall 122 is prone to compression deformation during the exhaust of the exhaust valve 100, especially at the conical side wall 122 corresponding to the recess 1220, which makes the exhaust valve 100 able to smoothly exhaust the excess gas in the gas production equipment. Among them, the recesses 1220 can be multiple, and the multiple recesses 1220 can be distributed on the outside or the inside of the conical side wall 122, further improving the deformation ability of the conical side wall 122.

[0083] It should be noted that the thickness of the circular top wall 121 in the direction perpendicular to the axial direction of the valve body 110 is greater than the thickness of the conical side wall 122 in the direction perpendicular to itself, so that the thickness of the conical side wall 122 is relatively thin and is more prone to deformation. Of course, the thickness of the circular top wall 121 can also be set to be not greater than the thickness of the conical side wall 122 according to actual needs.

[0084] In some embodiments, as shown in Figure 3 As shown, the end of the conical side wall 122 away from the circular top wall 121 has a circular port, and the projection of the circular port in the axial direction of the valve body 110 covers at least the projection of the second opening 1130 in the axial direction of the valve body 110.

[0085] The circular top wall 121 and the exhaust port 1320 are arranged in a staggered manner or partially overlap in the direction perpendicular to the axial direction of the valve body 110.

[0086] Specifically, the projection of the second opening 1130 in the axial direction of the valve body 110 is located in the circular port, that is, in the axial direction of the valve body 110, the projection area of the second opening 1130 is smaller than the projection area of the circular port, so that the first sealing member 120 can effectively seal the second opening 1130 in the first state, and effectively block the liquid discharged from the product equipment in the second state, ensuring that the liquid is not discharged during exhaust, and improving the use safety of the gas production equipment.

[0087] In the direction perpendicular to the axial direction of the valve body 110, the circular top wall 121 and the exhaust port 1320 are arranged in a staggered manner or partially overlap, and the circular top wall 121 does not completely cover the exhaust port 1320, so that the exhaust port 1320 and the second hollow cavity 1301 of the valve cap 130 always remain in a communication state during the process of the circular top wall 121 and the top stop of the valve cap 130.

[0088] It should be noted that the positioning hole 1321 can be located at the center of the top wall of the valve cap 130, and the exhaust port 1320 is a plurality of exhaust ports arranged in a ring array on the top wall of the valve cap 130, and the outer diameter of the ring array is greater than the diameter of the circular top wall 121, or the exhaust port 1320 is a ring-shaped hole, and the outer diameter of the ring-shaped hole is greater than the diameter of the circular top wall 121, so as to facilitate the uniform flow of the gas in the battery. The shape of the exhaust port 1320 can be circular, square, triangular, etc.

[0089] In some embodiments, as shown in FIG. 1, the valve body 110 includes a base portion 111 having a first hollow cavity 1110 therein, and the base portion 111 is in interference fit with the inner wall surface of the air vent 211. Figures 7 to 10

[0090] The bottom end of the base portion 111 is provided with a first clamping jaw portion 112 extending away from the first hollow cavity 1110 in a direction perpendicular to the axial direction of the valve body 110, and the first opening 1120 is formed between the first clamping jaw portion 112 and the base portion 111.

[0091] The top end of the base portion 111 is provided with a support portion 113 extending away from the first hollow cavity 1110 in a direction perpendicular to the axial direction of the valve body 110, and the second opening 1130 is formed on the support portion 113.

[0092] The base portion 111 is assembled at the air vent 211, and the first clamping jaw portion 112 and the support portion 113 are respectively in abutting fit with the two side walls of the gas generating device opposite to each other in the axial direction of the valve body 110 at the air vent 211.

[0093] Specifically, the valve body 110 includes a base portion 111 extending towards the internal space of the gas generating device and arranged to be installed in the air vent 211 of the gas generating device, and the base portion 111 has a first hollow cavity 1110 therein. The first hollow cavity 1110 provides a deformation space for the base portion 111 to deform inwardly, so that the base portion 111 is prone to deformation in a direction perpendicular to the axial direction thereof. The top end of the base portion 111 has a support portion 113 covering the base portion 111 and extending away from the first hollow cavity 1110, and the bottom end of the base portion 111 has a first clamping jaw portion 112 extending away from the first hollow cavity 1110. The first clamping jaw portion 112 is arranged in a ring shape, and when the base portion 111 is assembled into the air vent 211, the support portion 113 and the first clamping jaw portion 112 are respectively in abutting fit with the two side walls of the gas generating device opposite to each other in the axial direction of the valve body 110, so that the valve body 110 is in sealing fit with the gas generating device at the air vent 211.

[0094] ​By detachably installing the valve body 110 in the gas vent 211 of the gas production device, during the installation of the valve body 110, the base body 111 is inserted into the gas vent 211, during the insertion of the base body 111 into the gas vent 211, the first clamping jaw portion 112 is deformed towards the side close to the first hollow cavity 1110, and when the first clamping jaw portion 112 moves to the bottom end of the base body 111, the first clamping jaw portion 112 resets towards the side away from the first hollow cavity 1110 after losing the binding force of the inner wall surface of the gas vent 211, so that the first clamping jaw portion 112 is abutted and matched with the lower end surface of the gas production device, and the supporting portion 113 is abutted and matched with the upper end surface of the gas production device, so that the valve body 110 realizes the sealing of the gas vent 211, and at the same time avoids the valve body 110 from falling off due to the excessive pressure in the battery, and avoids the valve body 110 from sliding into the battery through the gas vent 211.

[0095] Among them, the supporting portion 113, the base body 111 and the first clamping jaw portion 112 are integrally formed to form the valve body 110, and the material of the valve body 110 can be selected from one or more of polybutylene terephthalate (PBT), polyamide (PA), polyethylene terephthalate (PET) and other thermoplastic resins. The valve body 110 can be integrally formed by general forming processes such as injection molding, compression molding and cutting, which is simple in processing technology and reduces the manufacturing cost of the valve body 110.

[0096] In some embodiments, as shown in Figure 8 The inner wall surface of the first hollow cavity 1110 at the second opening 1130 is inclined to the side away from the first hollow cavity 1110 along the axial direction of the valve body 110 to form a first chamfer structure 1131; or / and,

[0097] The supporting portion 113 is inclined to the side away from the first hollow cavity 1110 along the axial direction of the valve body 110 from the side end surface close to the first sealing member 120 to form a second chamfer structure 1132; or / and,

[0098] The side end surface of the first clamping jaw portion 112 away from the base body 111 is provided with a third chamfer structure.

[0099] Specifically, the first chamfer structure 1131 makes the second opening 1130 a downward-narrowing and upward-widening inverted conical opening, which plays a role in guiding the gas discharged from the gas vent 211 of the gas production device, so that the discharged gas can better push the conical side wall 122 of the first sealing member 120, and then the exhaust valve 100 is opened to exhaust. The second chamfer structure 1132 makes the supporting portion 113 a conical structure with a narrow upper end and a wide lower end, which facilitates the installation of the valve cap 130 and the valve body 110. The third chamfer structure facilitates the installation of the valve body 110 in the gas vent 211 of the gas production device.

[0100] In some embodiments, as shown in Figures 7 to 10 each of the openings 1111 extends from the bottom end of the first claw portion 112 to the top end of the base portion 111 along the axial direction of the valve body 110, the length of the opening 1111 is greater than 1 / 3 of the length of the base portion 111 and less than the length of the base portion 111.

[0101] Specifically, the length of the base portion 111 along the axial direction thereof is m, the length of the opening 1111 along the axial direction of the base portion 111 is greater than 1 / 3 of m and less than m. The length of the opening 1111 is configured to meet the deformation requirement of the base portion 111, facilitate the installation and disassembly of the valve body 110, and not affect the sealing between the valve body 110 and the gas production equipment. If the length of the opening 1111 is less than 1 / 3 of m, the deformation of the base portion 111 is too small, which is not conducive to the installation and disassembly of the base portion 111 at the gas leakage port 211. If the length of the opening 1111 is greater than m, it is not conducive to the sealing between the valve body 110 and the gas production equipment, which is easy to cause the electrolyte to leak from the opening 1111, etc. The opening 1111 can be an arc-shaped opening 1111, a square opening 1111, etc.

[0102] It can be understood that the first claw portion 112 is arranged at the bottom end of the base portion 111. In the case that the base portion 111 has the opening 1111 at the bottom end, the first claw portion 112 also has the opening 1111 therebetween, so that the first claw portion 112 is easy to deform in the direction perpendicular to the axial direction of the base portion 111, facilitating the installation and disassembly of the valve body 110.

[0103] Further, as shown in Figures 7 to 10 the plurality of openings 1111 are uniformly distributed circumferentially on the base portion 111. The number of the openings 1111 is 2-8, preferably 2-4, and each of the openings 1111 is uniformly distributed circumferentially on the base portion 111, so that each part of the base portion 111 can be uniformly stressed, which makes it easier for the first claw portion 112 to elastically deform into the first hollow cavity 1110 when the first claw portion 112 is inserted or taken out for secondary liquid supplement, further improving the convenience of the installation and disassembly of the valve body 110.

[0104] In some embodiments, as shown in Figure 2 and Figure 3 the exhaust valve 100 further comprises a second sealing member 140, the second sealing member 140 is annular and arranged outside the side wall of the base portion 111, and the side wall of the support portion 113 close to the base portion 111 is in abutting engagement with the corresponding side wall of the gas production equipment through the second sealing member 140.

[0105] Specifically, the first seal 120 and the second seal 140 are made of rubber elastic material, such as nitrile rubber, ethylene-propylene rubber, silicone rubber, fluororubber, acrylic rubber, hydrogenated nitrile rubber, etc., and can also be made of waterproof and breathable film, etc. The shape of the second seal 140 matches the formation of the side wall of the base portion 111. For example, the base portion 111 is circular, and the second seal 140 is annular. The lower end surface of the support portion 113 is in abutting cooperation with the upper end surface of the gas production device through the second seal 140. The second seal 140 enhances the sealing performance of the valve body 110 and the cover gas production device at the air release port 211. Even if the base portion 111 of the valve body 110 is provided with an opening 1111, electrolyte leakage will not occur, and the sealing performance of the air release port 211 is ensured.

[0106] In some embodiments, when the support portion 113 is in abutting cooperation with the corresponding side wall of the gas production device through the second seal 140, the second seal 140 is in a compressed state, and the compression amount of the second seal 140 along the axial direction of the valve body 110 accounts for 20% to 50% of the thickness of the second seal 140.

[0107] Specifically, as shown in Figure 17 The initial thickness of the second seal 140 is d1, and when the air release port is sealed, the second seal 140 is compressed along the axial direction of the base portion 111, and the compression amount of the second seal 140 is d2. The ratio of d2 to d1 is 20% to 50%, and the preferred ratio is 30% to 40%. That is, the thickness of the second seal 140 after compression is d1-d2. If the compression amount of the second seal 140 accounts for less than 20% of the thickness of the second seal 140, the compression amount is too small, and the sealing effect is insufficient. If the compression amount is greater than 50%, the compression amount is too large, which is time-consuming and laborious.

[0108] Further, the support portion 113, the base portion 111, and the first clamping jaw portion 112 are integrally formed. The valve body 110 can be made of one or more of polybutylene terephthalate (PBT), polyamide (PA), polyethylene terephthalate (PET), etc. The valve body 110 can be integrally formed by general forming processes such as injection molding, compression molding, and cutting, which is simple in processing technology and reduces the manufacturing cost of the valve body 110.

[0109] In some embodiments, as Figures 11 to 14As shown, the valve cap 130 includes a valve wall 131, which encloses a second hollow cavity 1301. A valve cover 132 is provided at the top of the valve wall 131, which covers the second hollow cavity 1301 and abuts against the first sealing element 120. The bottom end of the valve wall 131 extends along the axial direction perpendicular to the valve body 110 and toward the side closer to the second hollow cavity 1301 to form a second claw portion 133. A fourth chamfer structure is provided on the end face of the second claw portion 133 near the support portion 113. When the valve cap 130 is assembled with the support portion 113, the fourth chamfer structure cooperates with the second chamfer structure 1132 to facilitate the smooth fastening and installation of the valve cap 130 with the valve body 110.

[0110] The second claw portion 133 engages with the side wall of the support portion 113 away from the first seal 120.

[0111] Specifically, the valve cap 130 is composed of a valve wall 131, a valve cover 132, and a second claw portion 133. The exhaust port 1320 and the positioning hole 1321 are provided on the valve cover 132. When the valve cap 130 is engaged with the valve body 110, the valve cover 132 is engaged with the first sealing member 120, and the second claw portion 133 is engaged with the lower end face of the support portion 113. By utilizing the mutual cooperation of the valve wall 131, the valve cover 132, and the second claw portion 133, the first sealing member 120 is fixed between the valve cap 130 and the valve body 110, and the first sealing member 120 is in a sealing engagement with the valve body 110.

[0112] The second aspect of this utility model is as follows: Figures 15 to 19 As shown, a battery cover assembly 200 is provided, including a cover body 210, a vent 211 is provided on the cover body 210, and an exhaust valve 100 as described in any embodiment of this application is provided at the vent 211.

[0113] The battery cover body 210 is provided with a vent 211, which can serve as a battery electrolyte injection hole. This vent 211 allows for both venting and electrolyte injection. A vent valve 100, as described in any embodiment of this application, protrudes and is sealed at the vent 211. This ensures timely venting when the gas-generating equipment, such as a secondary battery, slowly generates gas, maintaining a constant internal pressure within a certain range. It also prevents the explosion-proof valve 215 from failing to burst due to excessive gas release, thus improving the safety of the secondary battery. Furthermore, during venting, liquid is not discharged, avoiding severe corrosion to the surrounding environment and equipment, further enhancing the safety and performance of the gas-generating equipment.

[0114] Furthermore, such as Figures 17 to 19As shown, the upper end surface of the cover plate body 210 is provided with a groove 212, the groove 212 is arranged in communication with the air vent 211, and the base body part 111 is at least partially assembled in the groove 212. The base body part 111 partially extends into the air vent 211, and the remaining part is located in the groove 212. The groove 212 facilitates the hiding of the base body part 111 and the second sealing member 140 and the like in the cover plate body 210, thereby improving the appearance of the exhaust valve 100.

[0115] It can be understood that, as Figure 15 and Figure 16 shown, the cover plate body 210 is further provided with a positive electrode pole 213, a negative electrode pole 214, an explosion-proof valve 215 and the like.

[0116] In a third aspect, the utility model provides a battery, which comprises the battery cover plate assembly 200 described in any of the embodiments.

[0117] The specific technical features and technical effects of the battery 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. The battery can be a lithium ion battery or the like.

[0118] In a fourth aspect, the utility model provides an electric device, which comprises the battery described in any of the embodiments.

[0119] Specifically, the specific technical features and technical effects of the electric device are consistent with those of the exhaust valve 100, and the embodiments of the application will not be repeated.

[0120] It should be noted that the electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and 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 a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy and 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, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The embodiments of the utility model do not specially limit the above-mentioned electric devices.

[0121] The above description is merely the preferred embodiments of the present application and the technical principles used. It should be understood by those skilled in the art that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An exhaust valve (100), characterized in that, The valve (100) comprises: a valve body (110) comprising a first hollow cavity (1110), the valve body (110) being provided with a first opening (1120) and a second opening (1130) at two ends in the axial direction and communicating with the first hollow cavity (1110); a first sealing element (120) arranged outside the valve body (110) at the second opening (1130); a valve cap (130) covering the first sealing element (120) and being in clamping connection with the valve body (110), the valve cap (130) being provided with an exhaust port (1320) penetrating therethrough, the exhaust port (1320), the second opening (1130) and the first opening (1120) being in communication to form an exhaust passage; the valve (100) having a sealed first state and an exhaust second state, in the first state, one end of the first sealing element (120) is in top stop connection with the valve cap (130), and the other end of the first sealing element (120) is in sealing connection with the valve body (110), so that the second opening (1130) and the exhaust port (1320) are in a disconnected state; in the second state, one end of the first sealing element (120) is in top stop connection with the valve cap (130), and the other end of the first sealing element (120) is in clearance connection with the valve body (110) after compression deformation, so that the second opening (1130) and the exhaust port (1320) are in a conductive state.

2. The exhaust valve (100) according to claim 1, characterized in that The first sealing element (120) comprises a circular top wall (121) and a conical side wall (122), the circular top wall (121) and the conical side wall (122) form a circular truncated cone structure, the circular top wall (121) is in top stop connection with the valve cap (130), and the conical side wall (122) is in sealing connection or clearance connection with the first sealing element (120).

3. The exhaust valve (100) according to claim 2, characterized in that A positioning column (1210) or a positioning groove is arranged on the side end face of the circular top wall (121) away from the conical side wall (122), and a positioning hole (1321) or a positioning protrusion is correspondingly arranged on the valve cap (130), the positioning column (1210) and the positioning hole (1321) or the positioning groove and the positioning protrusion are in plug-in connection in the axial direction of the valve body (110).

4. The exhaust valve (100) according to claim 2, characterized in that The conical side wall (122) is annularly provided with at least one circle of recesses (1220) perpendicular to the axial direction of the valve body (110).

5. The exhaust valve (100) according to claim 2, characterized in that The end of the conical side wall (122) away from the circular top wall (121) has a circular port, and the projection of the circular port in the axial direction of the valve body (110) covers at least the projection of the second opening (1130) in the axial direction of the valve body (110); The circular top wall (121) and the exhaust port (1320) are staggered or partially overlapped in the axial direction of the valve body (110).

6. The exhaust valve (100) according to any one of claims 1-5, characterized in that The valve body (110) comprises a base body (111) having the first hollow cavity (1110) therein. The bottom end of the base part (111) is provided with a first clamping jaw part (112) extending along the axial direction of the valve body (110) and away from the first hollow cavity (1110), and the first opening (1120) is formed between the first clamping jaw part (112) and the base part (111). The top end of the base part (111) is provided with a support part (113) extending along the axial direction of the valve body (110) and away from the first hollow cavity (1110), and the second opening (1130) is formed on the support part (113).

7. The exhaust valve (100) according to claim 6, characterized in that The inner wall surface of the first hollow cavity (1110) at the second opening (1130) is inclined away from the first hollow cavity (1110) along the axial direction of the valve body (110) to form a first chamfer structure (1131); or / and, The support part (113) is inclined away from the first hollow cavity (1110) along the axial direction of the valve body (110) from the side end face close to the first sealing element (120) to form a second chamfer structure (1132); or / and, The side end face of the first clamping jaw part (112) away from the base part (111) is provided with a third chamfer structure.

8. The exhaust valve (100) according to claim 6, characterized in that The base part (111) is circumferentially provided with at least one opening hole (1111) communicating with the first hollow cavity (1110), each opening hole (1111) extends from the bottom end of the first clamping jaw part (112) to the top end of the base part (111) along the axial direction of the valve body (110), the length of the opening hole (1111) is greater than 1 / 3 of the length of the base part (111) and less than the length of the base part (111).

9. The exhaust valve (100) according to claim 6, characterized in that The valve cap (130) comprises a valve wall (131) which encloses a second hollow cavity (1301), the top end of the valve wall (131) is provided with a valve cover (132) covering the second hollow cavity (1301) and top-stopping with the first sealing element (120); the bottom end of the valve wall (131) extends along the axial direction of the valve body (110) and away from the second hollow cavity (1301) to form a second clamping jaw part (133), and the second clamping jaw part (133) is in clamping engagement with the side wall of the support part (113) away from the first sealing element (120).

10. A battery cover plate assembly (200) characterized by, The cover plate body (210) is provided with a gas vent (211), and the gas vent (211) is detachably provided with the exhaust valve (100) of any one of claims 1-9, and the first opening (1120) passes through the gas vent (211) and is in communication with the inside of the gas production equipment.

11. The battery cover plate assembly (200) of claim 10, wherein, The base part (111) is in interference fit with the inner wall surface of the air vent (211); the base part (111) is assembled at the air vent (211), and the first clamping jaw part (112) and the supporting part (113) are respectively in abutting fit along the axially opposite two side walls of the valve body (110) at the air vent (211).

12. The battery cover plate assembly (200) of claim 11, wherein, Further comprising a second sealing member (140), which is annular and arranged outside the side wall of the base part (111), and the supporting part (113) is in abutting fit with the corresponding side wall through the second sealing member (140) near one side wall of the base part (111); when the supporting part (113) is in abutting fit with the corresponding side wall through the second sealing member (140), the second sealing member (140) is in compression state, and the compression amount of the second sealing member (140) along the axial direction of the valve body (110) accounts for 20%-50% of the thickness of the second sealing member (140).

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