CN216698637U

CN216698637U - Explosion-proof valve, battery and power consumption device

Info

Publication number: CN216698637U
Application number: CN202123322222.XU
Authority: CN
Inventors: 余效银; 陈彬彬; 黄智杰; 潘鑫
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-07
Anticipated expiration: 2031-12-27
Also published as: WO2023124832A1

Abstract

The embodiment of the application provides an explosion-proof valve, battery and power consumption device, and the explosion-proof valve includes the main part, the protecgulum of being connected with the main part, guide arm, buckle structure and control structure. Wherein, the guide rod is connected with the main body and is arranged in the main body; the buckling structure comprises a clamping claw part arranged on the front cover and a buckling part arranged on the guide rod, the buckling part can move along the axial direction of the guide rod, or the buckling structure comprises a buckling part arranged on the front cover and a clamping claw part arranged on the guide rod, the clamping claw part can move along the axial direction of the guide rod, and the buckling part is clamped with the clamping claw part; the control structure is arranged on one side, away from the buckling structure, of the front cover and connected with the buckling structure, and the clamping claw portion and the buckling portion are disconnected. Among the above-mentioned explosion-proof valve, when the inside of battery was maintained to needs, accessible control structure control card detains structure disconnection for the protecgulum can be opened, thereby can maintain battery inside, reduces the inside maintenance degree of difficulty of battery.

Description

Explosion-proof valve, battery and power consumption device

Technical Field

The application relates to the technical field of electrochemical devices, in particular to an explosion-proof valve, a battery and an electric device.

Background

Because of the advantages of high energy density, light weight and the like, the lithium battery is widely applied to the technical fields of portable electronic equipment, electric automobiles, aerospace and the like. And safety performance is an important factor limiting the development of lithium batteries.

In the related art, in order to improve the safety performance of the battery, an explosion-proof valve is provided on a case of the battery. The explosion-proof valve can carry out the pressure release to the battery when battery internal pressure is great to reduce the pressure differential of the inside and outside of battery, thereby reduce the probability that the battery takes place thermal failure. The pressure relief capacity of the explosion-proof valve in the related art is not too high, so that the safety performance of the battery is not good enough. In addition, when the battery is required to be maintained, the explosion-proof valve needs to be detached, so that the maintenance difficulty of the battery is high.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this application is to provide an explosion-proof valve, battery and power consumption device to improve the pressure release performance of explosion-proof valve, thereby improve the security performance of battery, and reduce the inside maintenance degree of difficulty of battery. The specific technical scheme is as follows:

an embodiment of the first aspect of the present application provides an explosion-proof valve, which includes a main body, a front cover connected with the main body, a guide rod, a buckle structure and a control structure. Wherein, the guide rod is connected with the main body and is arranged in the main body; the buckling structure comprises a clamping claw part arranged on the front cover and a buckling part arranged on the guide rod, the buckling part can move along the axial direction of the guide rod, or the buckling structure comprises a buckling part arranged on the front cover and a clamping claw part arranged on the guide rod, the clamping claw part can move along the axial direction of the guide rod, and the buckling part is clamped with the clamping claw part; the control structure is arranged on one side of the front cover, which is far away from the buckle structure, and the control structure is connected with the buckle structure and used for controlling the connection between the claw part and the buckle part.

The explosion-proof valve that this application embodiment provided, explosion-proof valve can install on the box of battery, and the inside of explosion-proof valve and the inside intercommunication of battery. When inside atmospheric pressure of battery is greater than the outside atmospheric pressure of battery, the protecgulum outwards removes under the effect of the inside and outside pressure differential of battery and opens, drives the axis direction removal of buckle structure along the guide arm, and from this, the protecgulum is opened and is gone out the inside atmospheric pressure release of battery, reduces the inside and outside pressure differential of battery. After the internal and external pressure difference of the battery is reduced, the buckle structure drives the front cover to move backwards so that the front cover is connected with the main body again, and the interior of the battery is in a sealing state again. And when the internal and external pressure difference of battery was too big, great pressure difference can make the removal stroke of protecgulum great for buckle structure is tripped under the effect of great pulling force, and the protecgulum no longer with be connected with the main part through buckle structure, the inside and outside intercommunication of battery this moment makes the internal and external pressure difference of battery be close to zero, and from this, the pressure release performance of explosion-proof valve is stronger, can reduce the probability that thermal failure appears in the battery, thereby improves the security performance of battery. In addition, when the inside of battery is maintained to needs, accessible control structure control card buckle structure disconnection for the protecgulum can be opened, thereby can maintain the battery is inside, and after the maintenance to the battery is accomplished, accessible control structure makes buckle structure reconnect, can be under the condition that does not cause the damage to explosion-proof valve, reduces the inside maintenance degree of difficulty of battery.

In some embodiments, the pawl portion is disposed on the front cover, and the control structure is coupled to the pawl portion. The clamping jaw portion comprises a first clamping hook and a second clamping hook which are oppositely arranged, the first clamping hook comprises a first end and a second end, the first end is located on one side, close to the main body, of the front cover, the second end is located on one side, far away from the main body, of the front cover, the second clamping hook comprises a third end and a fourth end, the third end is located on one side, close to the main body, of the front cover, the fourth end is located, far away from the main body, of the front cover, the control structure comprises a second end and a fourth end, the distance between the second end and the fourth end is adjustable, and the axis direction perpendicular to the guide rod is arranged. From this, reduce the distance between second end and the fourth end through control structure and can make the buckle portion dropout for no longer be connected through buckle structure between protecgulum and the main part, the protecgulum is opened, can maintain battery inside, reduces the inside maintenance degree of difficulty of battery.

In some embodiments, the explosion-proof valve further includes a fixing housing, the fixing housing is located on a side of the front cover away from the main body, a portion of the claw portion located on a side of the front cover away from the main body is disposed in the fixing housing, and the second end and the fourth end are bent in a direction opposite to each other to extend out of the fixing housing. Therefore, the fixed shell limits the adjustable distance range between the second end and the fourth end edge, and reduces the probability of damages such as bending of the first clamping hook or the second clamping hook caused by over-adjustment of the second end and the fourth end.

In some embodiments, the locking portion is disposed on the front cover, and the control structure is connected to the locking portion. The clamping claw part comprises a third clamping hook and a fourth clamping hook which are oppositely arranged, and a gap is formed between the third clamping hook and the fourth clamping hook; the clamping part is clamped with the third clamping hook and the fourth clamping hook, and the control structure is used for controlling the rotation of the clamping part so that the clamping part is arranged in the gap and is disconnected with the third clamping hook and the fourth clamping hook. Therefore, when the interior of the battery needs to be maintained, the buckling part can be tripped by rotating the buckling part through the control structure, so that the front cover is not connected with the main body through the buckling structure any more, the front cover is opened, the interior of the battery can be maintained, and the maintenance difficulty of the interior of the battery is reduced.

In some embodiments, the guide rod comprises a first section and a second section connected with the first section, the first section can move along the axis direction of the first section, and the clamping claw part or the clamping buckle part is arranged on one side of the first section, which is far away from the second section; the explosion-proof valve further comprises an elastic element, the elastic element is connected with the first section and the second section, and the elastic element is sleeved on the outer side of the first section. Therefore, the front cover is in close contact with the main body under the action of the tensile force of the elastic structure, and the sealing performance of the explosion-proof valve is guaranteed.

In some embodiments, the body and the front cover are hingedly connected. From this, make the protecgulum rotate certain angle for the main part, the angle and the direction that the control protecgulum was opened avoid the interior gas outgoing of battery to influence the function of other electrical part in the explosion-proof valve, make the pressure release that the explosion-proof valve can be better.

In some embodiments, the body includes a first sidewall hingedly coupled to the front cover, and a second sidewall disposed opposite the first sidewall, the guide bar being disposed closer to the second sidewall than the first sidewall. Therefore, the included angle between the part of the front cover above the guide rod and the main body is reduced, so that more gas in the battery is discharged from the opening of the front cover below the guide rod, more high-pressure gas in the battery is discharged downwards, and the influence of the high-pressure gas discharged by the explosion-proof valve on other electric devices in the battery is further reduced.

In some embodiments, the explosion proof valve further comprises a first seal and a second seal, the first seal being located between the front cover and the body; the second seal is located on a side of the body remote from the front cover. The first sealing member and the second sealing member can increase the air tightness of the explosion-proof valve, prevent gas in the battery from leaking or external gas from entering the battery, and reduce the probability of battery failure.

Embodiments of the second aspect of the present application provide a battery, which includes any one of the above-mentioned explosion-proof valves, and the explosion-proof valve is disposed on a housing of the battery.

Embodiments of the third aspect of the present application provide an electric device, which includes the above battery, and the battery is used for supplying electric energy to the electric device.

Of course, not all advantages described above need to be achieved at the same time in the practice of any one product or method of the present application. The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is also obvious for a person skilled in the art to obtain other embodiments according to the drawings.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is a schematic diagram of a structure of a battery according to some embodiments of the present application;

FIG. 3 is an exploded view of an explosion-proof valve according to some embodiments of the present application;

FIG. 4 is a schematic illustration of a structure of an explosion-proof valve in accordance with certain embodiments of the present application;

FIG. 5 is a schematic view of another configuration of an explosion-proof valve according to some embodiments of the present disclosure;

FIG. 6 is a cross-sectional view of an explosion-proof valve according to some embodiments of the present application;

FIG. 7 is another cross-sectional view of an explosion-proof valve according to some embodiments of the present application;

FIG. 8 is a further cross-sectional view of an explosion vent valve according to some embodiments of the present application.

Reference numerals: 1-a vehicle; 2-a motor; 3-a battery; 31-a battery cell; 32-a battery case; 321-an upper shell; 322-a lower housing; 4-a controller; 10-an explosion-proof valve; 101-a body; 1011-a first side wall; 1012-a second sidewall; 102-a front cover; 1021-a first side; 1022-a second side; 103-a guide rod; 1031-first section; 1032-a second section; 104-a snap-fit structure; 1041-a jaw portion; 10411-first hook; 10412-second hook; 10413-third hook; 10414-fourth hook; a-a first end; b-a second end; c-a third terminal; d-a fourth end; 1042-a fastening part; 105-a control structure; 106-a stationary housing; 107-a resilient element; 108-a first seal; 109-second seal.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the description herein are intended to be within the scope of the present disclosure.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In order to improve the safety performance of the lithium battery, the lithium battery mainly adopts modes of nicking, welding an explosion-proof film and the like as an explosion-proof device. Specifically, nick or rupture membrane desolder, rupture when the inside gas expansion of battery intensification, pressure increase to a certain degree, gassing pressure release to avoid the battery explosion, thereby improve the security performance of lithium cell. The lithium battery explosion-proof device is difficult to be fully consistent in structure, and the starting pressure value of the air release and pressure relief of the explosion-proof device is large, so that the air release and pressure relief can not be carried out immediately under the abnormal condition of the battery, and the lithium battery is caused to explode. In addition, when the inside of lithium cell needs to be maintained, need take the battery case apart, the maintenance process is comparatively loaded down with trivial details. In order to solve the problems, an explosion-proof valve is arranged on a shell of the battery so as to improve the safety performance of the lithium battery.

The explosion-proof valve is a breathable, waterproof and explosion-proof automobile part and accessory, and is applied to new energy electric automobiles at present. The automobile lithium ion battery explosion-proof valve integrates the functions of a waterproof breathable film and an explosion-proof valve, has the functions of explosion prevention and explosion damage reduction of the traditional explosion-proof valve, and also has the functions of water prevention and ventilation.

In the related art, the explosion-proof valve is generally closed at the air outlet by gravity or provided with an explosion-proof sheet at the air outlet. When the internal and external pressure difference of the battery reaches a certain value, namely the internal pressure of the battery reaches the maximum bearing pressure of the explosion-proof valve, the internal pressure of the battery opens a sealing cover or an explosion-proof sheet in the explosion-proof valve so as to discharge the internal pressure and gas, and the internal and external pressure difference is reduced. However, after the explosion-proof valve in the related art is decompressed, a certain pressure difference still exists between the inside and the outside of the explosion-proof valve, so that the pressure releasing capacity of the explosion-proof valve is not high enough, and the explosion-proof valve cannot meet the process items with higher requirements on the internal and external pressure differences, such as spraying and other process items, and the safety performance of the battery is not good enough. In addition, when the interior of the battery needs to be maintained, the explosion-proof valve needs to be disassembled or the shell of the battery needs to be disassembled, so that the maintenance process is complicated, and the explosion-proof valve can be damaged.

In order to solve the problems, the inventor designs an explosion-proof valve, namely the explosion-proof valve in the application, which can improve the pressure relief performance of the explosion-proof valve, reduce the probability of thermal failure of the battery and further improve the safety performance of the battery. When maintaining inside the battery, the accessible control structure opens the battery protecgulum, reduces the inside maintenance degree of difficulty of battery.

The embodiment of the application provides that the explosion-proof valve can be applied to the battery, and the battery including this explosion-proof valve can regard as the power of consumers. Among them, the power consumption device may be a mobile phone, a portable device, a notebook computer, a battery car, an electric vehicle, a ship, a spacecraft, an electric toy, an electric tool, and the like, for example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, and the like, the electric toy includes a stationary or mobile electric toy, for example, a game machine, an electric vehicle toy, an electric ship toy, an electric plane toy, and the like, and the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for a railway, 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.

For convenience of description, the following embodiments are described by taking an electric device as an example of a vehicle according to an embodiment of the present application.

The battery described in the embodiments of the present application is not limited to be applied to the above described electric devices, but may be applied to all devices using batteries.

For example, referring to fig. 1, the vehicle 1 may be a fuel-oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or a range-extended vehicle. The vehicle 1 may be provided with a battery 3, a controller 4, and a motor 2 inside, the controller 4 being configured to control the battery 3 to supply power to the motor 2. For example, the battery 3 may be provided at the bottom or the head or tail of the vehicle 1. The battery 3 may be used for power supply of the vehicle 1, for example, the battery 3 may be used as an operation power supply of the vehicle 1 for a circuit system of the vehicle 1, for example, for power demand for operation in starting, navigation, and running of the vehicle 1.

In another embodiment of the present application, the battery 3 may be used not only as an operation power source of the vehicle 1 but also as a driving power source of the vehicle 1 instead of or in part of fuel or natural gas to provide driving power for the vehicle 1.

Referring to fig. 2, the battery 3 includes a battery cell 31 and a battery case 32, the battery cell 31 is accommodated in the battery case 32, the battery case 32 may include an upper case 321 and a lower case 322, and the upper case 321 and the lower case 322 are fixedly connected to form an accommodating space. In the battery 3, the number of the battery cells 31 may be plural, and the plural battery cells 31 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plural battery cells 31. The plurality of battery monomers 31 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 31 is accommodated in the battery shell 32; of course, the battery 3 may also be a battery module formed by connecting a plurality of battery cells 31 in series, in parallel, or in series-parallel, and a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a whole and accommodated in the battery case 32. The battery 3 may further include other structures, for example, the battery 3 may further include a bus member for achieving electrical connection between the plurality of battery cells 31. For example, parallel connection, series connection or parallel-series connection between a plurality of battery cells 31 is realized. Specifically, the bus member may achieve electrical connection between the battery cells 31 by connecting electrode terminals of the battery cells 31. Further, the bus bar member may be fixedly connected to the electrode terminals of the battery cells 31 by welding. Alternatively, the bus bar member may include a conductive mechanism, and the electric energy generated by the plurality of battery cells 31 may be further extracted through the battery cells 31 by the conductive mechanism.

Each battery cell 31 may be a secondary battery or a primary battery. The battery cell 31 may also be a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery, but is not limited thereto. The battery cell 31 may be cylindrical, flat, rectangular parallelepiped, or other shape.

An embodiment of the first aspect of the present application provides an explosion-proof valve, as shown in fig. 3 to 6, an explosion-proof valve 10 includes a main body 101, a front cover 102 connected to the main body 101, a guide rod 103, a snap structure 104, and a control structure 105. Wherein the guide rod 103 is connected with the main body 101 and is disposed in the main body 101. The fastening structure 104 includes a fastening portion 1041 disposed on the front cover 102 and a fastening portion 1042 disposed on the guide rod 103, and the fastening portion 1042 can move along the axial direction of the guide rod 103, or the fastening structure 104 includes a fastening portion 1042 disposed on the front cover 102 and a fastening portion 1041 disposed on the guide rod 103, and the fastening portion 1041 can move along the axial direction of the guide rod 103, and the fastening portion 1042 is fastened to the fastening portion 1041. The control structure 105 is disposed on a side of the front cover 102 away from the latching structure 104, and the control structure 105 is connected to the latching structure 104 and is used for controlling the claw portions 1041 to be disconnected from the latching portions 1042.

The main body 101 is a main component structure of the explosion-proof valve 10, the main body 101 may be a hollow structure, the guide rod 103 is connected with the main body 101 and is disposed inside the main body 101, and the main body 101 is used for providing a receiving space for the guide rod 103. The main body 101 is disposed on the battery case 32 and the battery case 32 is fixedly connected, and the main body 101 communicates with the inside of the battery 3, whereby the main body 101 can provide a release passage for the gas inside the battery 3. The body 101 may have a substantially rectangular parallelepiped shape, a cylindrical shape, or the like. The material of the main body 101 may be metal or plastic, etc., wherein the material and the shape of the main body 101 may be determined according to actual requirements, which is not specifically limited in this application.

In the embodiment of the present application, the front cover 102 is connected to the main body 101 and is located on a side of the main body 101 away from the battery case 32. The front cover 102 may serve to seal one end of a gas passage formed by the main body 101, preventing the inside of the battery 3 from communicating with the outside during normal operation of the battery 3. The shape of the front cover 102 may be adapted to the shape of the opening of the main body 101, for example, when the main body 101 is rectangular, the front cover 102 may be rectangular; when the body 101 has a cylindrical shape, the front cover 102 may have a circular shape.

In the embodiment of the present application, the fastening structure 104 is a structural member disposed on the front cover 102 and the main body 101 to connect the front cover 102 and the main body 101. The fastening structure 104 includes a claw portion 1041 and a fastening portion 1042 which are adapted to each other and are connected in a fastening manner. The locking portion 1042 and the locking claw portion 1041 are respectively disposed on the front cover 102 and the guide rod 103 to connect the front cover 102 and the guide rod 103. Specifically, the claw portions 1041 may be disposed on an inner side of the front cover 102, and the corresponding buckling portions 1042 are disposed on a side of the guide rod 103 close to the front cover 102; the claw portions 1041 may also be disposed on a side of the guide rod 103 close to the front cover 102, and the corresponding buckling portions 1042 are disposed on an inner side of the front cover 102. When the front cover 102 is subjected to a certain gas pressure inside the battery, the front cover 102 is opened, that is, the front cover 102 moves in a direction away from the main body 101, and the front cover 102 drives the claw portions 1041 or the buckling portions 1042 to move, so as to drive the guide rods 103 to move. In addition, since the locking portion 1042 or the claw portion 1041 can move along the axial direction of the guide rod 103, the locking portion 1042 or the claw portion 1041 can move along the direction departing from the front cover 102, when the pressure in the battery 3 is released, the locking portion 1042 or the claw portion 1041 can drive the front cover 102 to close, that is, the front cover 102 is driven to be connected with the main body 101 again.

In the embodiment of the present application, the control structure 105 is disposed outside the front cover 102 and connected to the fastening structure 104, and the fastening portion 1042 limits the position of the claw portion 1041 so as to disconnect the claw portion 1041 from the fastening portion 1042. The control structure 105 may be integrated with the locking portion 1042 or the locking claw portion 1041. The preset stroke is related to the pressure difference between the inside and the outside of the battery, namely the maximum safe pressure which can be borne before thermal runaway occurs in the battery 3, so that the preset stroke can be set according to the maximum safe pressure borne by the battery 3, and the specific numerical value of the preset stroke is not limited in the application.

In the embodiment of the present application, the explosion-proof valve 10 may be installed on a box body of the battery, and the inside of the explosion-proof valve 10 is communicated with the inside of the battery. When the air pressure inside the battery is greater than the air pressure outside the battery, the front cover 102 moves outwards to be opened under the action of the pressure difference between the inside and the outside of the battery, and the buckle structure 104 is driven to move along the axis direction of the guide rod 103, so that the air pressure inside the battery is released by opening the front cover 102, and the pressure difference between the inside and the outside of the battery is reduced. After the difference between the internal pressure and the external pressure of the battery is reduced, the snap structure 104 drives the front cover 102 to move backwards so that the front cover 102 is connected with the main body 101 again, and the inside of the battery is in a sealed state again. When the internal and external pressure difference of the battery is too large, the large pressure difference can enable the moving stroke of the front cover 102 to be large, the buckle structure 104 is enabled to be tripped under the action of large pulling force, the front cover 102 is not connected with the main body 101 through the buckle structure 104 any more, the internal and external of the battery are communicated at the moment, the internal and external pressure difference of the battery is close to zero, therefore, the pressure relief performance of the explosion-proof valve 10 is high, the probability of thermal failure of the battery can be reduced, and the safety performance of the battery is improved. In addition, when the inside of the battery needs to be maintained, the control structure 105 can control the buckle structure 104 to be disconnected, so that the front cover 102 can be opened, the inside of the battery can be maintained, and after the maintenance of the inside of the battery is completed, the buckle structure 104 can be reconnected through the control structure 105, and the maintenance difficulty of the inside of the battery can be reduced without damaging the explosion-proof valve 10.

In some embodiments, as shown in fig. 6, the claw portions 1041 are disposed on the front cover 102, and the control structure 105 is connected to the claw portions 1041. The claw portion 1041 includes a first hook 10411 and a second hook 10412 which are oppositely arranged, the first hook 10411 includes a first end a located on one side of the front cover 102 close to the main body 101 and a second end b located on one side of the front cover 102 far from the main body 101, and the second hook 10412 includes a third end c located on one side of the front cover 102 close to the main body 101 and a fourth end d located on one side of the front cover 102 far from the main body 101. The control structure 105 includes a second end b and a fourth end d, and a distance between the second end b and the fourth end d is adjustable along a direction perpendicular to the axis of the guide rod 103.

In the embodiment of the application, the first hook 10411 and the second hook 10412 are main components of the hook portion 1041, and as shown in fig. 6, at least one end of the first hook 10411 and the second hook 10412 is bent to form a bent hook portion. The first hook 10411 and the second hook 10412 are disposed oppositely, that is, at least one end of the first hook 10411 and the second hook 10412 is bent along an opposite direction to form a bent hook portion, specifically, as shown in fig. 5 and 6, the first end a and the third end c are bent along an opposite direction to form a bent hook portion. The hook portions of the first hook 10411 and the second hook 10412 form an accommodating space, and the hook portions of the first hook 10411 and the second hook 10412 are clamped with the fastening portion 1042, so that at least part of the fastening portion 1042 is located in the accommodating space formed by the first hook 10411 and the second hook 10412, thereby connecting the hook portion 1041 and the fastening portion 1042.

As shown in fig. 5 and 6, the second end b of the first hook 10411 passes through the front cover 102 and is disposed outside the front cover 102. The fourth end d of the second hook 10412 also passes through the front cover 102 and is disposed outside the front cover 102. The control structure 105 includes a second terminal b and a fourth terminal d. The first end a and the second end b of the first hook 10411 may be an integral structure, and the third end c and the fourth end d of the second hook 10412 may also be an integral structure. Thus, by controlling the distance between the second end b and the fourth end d, the distance between the first end a and the third end c can be changed, and the size of the accommodating space formed by the first end a and the third end c together can be changed. Specifically, when the second end b and the fourth end d are controlled to approach each other, the distance between the second end b and the fourth end d is decreased, and at this time, the first end a and the third end c move in the direction away from each other, so that the distance between the first end a and the third end c is increased, and the volume of the accommodating space formed by the first end a and the third end c is increased, and based on this, the fastening portion 1042 can be disengaged from the accommodating space, and can be disconnected from the first fastening hook 10411 and the second fastening hook 10412, that is, disconnected from the fastening portion 1041. When the second end b and the fourth end d are controlled to be away from each other, the distance between the second end b and the fourth end d is increased, and at this time, the first end a and the third end c move in the direction of approaching each other, so that the distance between the first end a and the third end c is decreased, and the volume of the accommodating space formed by the first end a and the third end c is decreased, based on which, the first end a and the third end c can limit the fastening part 1042 again, and the fastening part 1042 can be reconnected with the first fastening hook 10411 and the second fastening hook 10412, that is, reconnected with the fastening claw part 1041.

Further, the first hook 10411 and the second hook 10412 may be made of an elastic material, such as an elastic metal or plastic. When the first hooks 10411 and the second hooks 10412 are made of an elastic material and the pressure applied to the second end b and the fourth end d is removed, the second end b and the fourth end d can be restored by the elastic force of the second end b and the fourth end d, so that the first hooks 10411 and the second hooks 10412 are conveniently reconnected with the buckling part 1042.

Further, as shown in fig. 3, 4 and 6, the second end b and the fourth end d may be bent in opposite directions to form a bent portion, so as to facilitate pressing of the second end b and the fourth end d, and facilitate adjusting a connection state between the claw portion 1041 and the locking portion 1042 by adjusting a distance between the second end b and the fourth end d.

In the embodiment of the present application, since the second end b of the first hook 10411 and the fourth end d of the second hook 10412 pass through the front cover 102 and are disposed outside the front cover 102, the control structure 105 can adjust the distance between the third end c and the first end a by adjusting the distance between the second end b and the fourth end d, so that the locking portion 1041 and the locking portion 1042 can be repeatedly connected or disconnected. Therefore, when the interior of the battery needs to be maintained, the control structure 105 reduces the distance between the second end b and the fourth end d to release the locking portion 1042, so that the front cover 102 and the main body 101 are no longer connected by the locking structure 104, the front cover 102 is opened, and the interior of the battery can be maintained. After the maintenance is completed, the distance between the second end b and the fourth end d is increased by the control structure 105, so that the fastening portion 1042 can be connected with the fastening claw portion 1041 again, and the maintenance difficulty inside the battery can be reduced without damaging the explosion-proof valve 10.

In some embodiments, the explosion-proof valve 10 further includes a fixed housing 106, the fixed housing 106 is located on a side of the front cover 102 away from the main body 101, a portion of the claw portion 1041 located on the side of the front cover 102 away from the main body 101 is disposed in the fixed housing 106, and the second end b and the fourth end d are bent toward an opposite direction to protrude out of the fixed housing 106.

In the embodiment of the present application, as shown in fig. 4 and 5, the fixed casing 106 is disposed outside the front cover 102, and the fixed casing 106 is a hollow structure to wrap the portion of the claw portion 1041 located outside the front cover 102. The shape of the fixing housing 106 may be a rectangular parallelepiped, a cylinder, or the like, which is not particularly limited in this application. The material of the fixing housing 106 may be metal, plastic, rubber, etc., and is not particularly limited in this application. When the materials of the fixed housing 106 and the front cover 102 are both plastics, the fixed housing 106 and the front cover 102 may be integrally injection molded.

In the embodiment of the present application, the fixed housing 106 is used to protect the partial structure of the claw portion 1041 located outside the front cover 102, and reduce the probability of damage to the partial structure of the claw portion 1041 located outside the front cover 102. In addition, since the second end b and the fourth end d are bent in opposite directions and penetrate through the side wall of the fixed housing 106 to be disposed outside the fixed housing 106, when the second end b and the fourth end d are pressed, the height of the fixed housing 106 in the vertical direction is the shortest distance between the second end b and the fourth end d, that is, the fixed housing 106 limits the adjustable distance range between the edges of the second end b and the fourth end d, and reduces the probability of damage such as bending of the first hook 10411 or the second hook 10412 caused by over-adjustment of the second end b and the fourth end d.

In some embodiments, as shown in fig. 7 and 8, the latching portion 1042 is disposed on the front cover 102, and the control structure 105 is connected to the latching portion 1042. The claw portion 1041 includes a third hook 10413 and a fourth hook 10414 disposed oppositely, and a gap is formed between the third hook 10413 and the fourth hook 10414. The locking portion 1042 is locked with the third locking hook 10413 and the fourth locking hook 10414, and the control structure 105 is configured to control the locking portion 1042 to rotate, so that the locking portion 1042 is disposed in the gap and disconnected from the third locking hook 10413 and the fourth locking hook 10414.

In the embodiment of the present application, the third hook 10413 and the fourth hook 10414 are both main components of the hook portion 1041, as shown in fig. 7, at least one end of the third hook 10413 and the fourth hook 10414 is bent to form a hook portion, and a gap is formed between the hook portions of the third hook 10413 and the fourth hook 10414. As shown in fig. 7, the third hook 10413 and the fourth hook 10414 are respectively connected to the locking portion 1042 to connect the front cover 102 and the main body 101.

In the embodiment of the present application, as shown in fig. 7 and 8, the height of the locking portion 1042 in the vertical direction may be different from the thickness of the locking portion 1042 in the horizontal direction, and the vertical direction is a direction perpendicular to the axis of the guide rod 103, and the horizontal direction is a direction parallel to the axis of the guide rod 103. In addition, the height of the locking portion 1042 is greater than the height of the gap between the third hook 10413 and the fourth hook 10414 along the first direction, so the third hook 10413 and the fourth hook 10414 can be respectively locked with the upper side and the lower side of the locking portion 1042 to limit the locking portion 1042, as shown in fig. 7, so as to connect the locking portion 1041 and the locking portion 1042. In addition, the thickness of the locking portion 1042 in the second direction is smaller than the height of the gap between the third hook 10413 and the fourth hook 10414 in the first direction, so that when the locking portion 1042 is rotated by a certain angle, such as 90 degrees, by the control structure 105, the locking portion 1042 can be placed in the gap between the third hook 10413 and the fourth hook 10414, as shown in fig. 8, at this time, the locking portion 1042 is no longer limited by the third hook 10413 and the fourth hook 10414, and the locking portion 1042 is disconnected from the locking portion 1041.

In the embodiment of the application, the control structure 105 rotates the locking portion 1042, so that the locking portion 1042 is locked with the locking claw portion 1041, or the locking portion 1042 is disposed in a gap between the third hook 10413 and the fourth hook 10414 to be disconnected from the third hook 10413 and the fourth hook 10414. Therefore, when maintenance of the inside of the battery is needed, the control structure 105 rotates the locking part 1042 to release the locking part 1042, so that the front cover 102 is no longer connected to the main body 101 through the locking structure 104, the front cover 102 is opened, and maintenance of the inside of the battery can be performed. After the maintenance is completed, the fastening portion 1042 can be reset by rotating the fastening portion 1042 to be connected with the claw portion 1041 again, so that the maintenance difficulty inside the battery can be reduced without damaging the explosion-proof valve 10.

In some embodiments, the guide bar 103 includes a first section 1031 and a second section 1032 connected to the first section 1031, the first section 1031 is movable in the axial direction, and the latch portion 1041 or the latch portion 1042 is disposed on a side of the first section 1031 away from the second section 1032. The explosion-proof valve 10 further comprises an elastic element 107, wherein the elastic element 107 is connected with the first section 1031 and the second section 1032, and the elastic element 107 is sleeved on the outer side of the first section 1031.

In the embodiment of the present application, referring to fig. 6, the guide rod 103 is in a stepped shaft shape, and the guide rod 103 includes a first section 1031 and a second section 1032 in a cylindrical section shape. The first section 1031 is movable along its axial direction, the second section 1032 is fixedly connected to the main body 101, and the latch portion 1042 or the latch portion 1041 is disposed on a side of the first section 1031 away from the second section 1032. Specifically, as shown in fig. 7, the second section 1032 is hollow, when the first section 1031 moves along its axis, the partial structure of the first section 1031 is placed in the second section 1032, and the partial structure of the first section 1031 can move in the axis direction in the second section 1032.

The elastic element 107 may be a spring or other elastic structure, and the spring includes a cylindrical spring or a tower spring. One end of the elastic element 107 is fixedly connected to the second section 1032, and the other end is connected to one side of the first section 1031 close to the fastening portion 1042 or the clamping portion 1041, and the elastic element 107 can drive the first section 1031 connected thereto to move along the axis direction thereof by its own elastic force and resilience.

In the technical solution of the embodiment of the application, when the front cover 102 receives an impact force formed by internal pressure of the battery 3, the front cover 102 drives the fastening portion 1042 or the fastening portion 1041 and the first section 1031 to move along the axis direction of the guide rod 103, the elastic element 107 is in a stretching state, and at this time, the front cover 102 is opened and high-pressure gas inside the battery 3 is exhausted from the front cover 102. After the battery is decompressed, the elastic element 107 rebounds, and the rebounding force of the elastic element 107 drives the fastening portion 1042 or the claw portion 1041 to move towards the main body 101, so as to drive the front cover 102 to move towards the main body 101, so that the front cover 102 is connected with the main body 101 again. In addition, when the front cover 102 is connected with the main body 101, the front cover 102 is in close contact with the main body 101 under the pulling force of the spring, and the sealing performance of the explosion-proof valve 10 is ensured. Furthermore, the elastic element 107 is also used for buffering during the movement of the first section 1031 in the axial direction thereof.

In some embodiments, the body 101 and the front cover 102 are hingedly connected.

In the technical scheme of the embodiment of the application, the main body 101 and the front cover 102 are hinged, so that the front cover 102 can rotate a certain angle relative to the main body 101. As shown in fig. 5, the front cover 102 includes a first side 1021 connected to the upper side of the main body 101 and a second side 1022 opposite to the first side 1021, when the pressure inside the battery is higher than the external pressure, the pressure difference between the inside and the outside causes the front cover 102 to rotate relative to the main body 101 about the center line of the hinge, i.e. the first side 1021 of the front cover 102 is still connected to the main body 101 and the second side 1022 moves away from the main body 101. Thus, the difference in internal and external pressures causes the front cover 102 to form an opening at the second side 1022, and the opening is directed away from the first side 1021.

In the embodiment of the present application, when the explosion-proof valve 10 is installed on the sidewall of the battery housing, the first side 1021 of the front cover 102 can be arranged close to the bottom wall of the housing, so that when the front cover 102 is opened, the opening of the front cover 102 faces downward, thereby controlling the opening angle and direction of the front cover 102, discharging the high-pressure gas in the battery downward, reducing the influence of the high-pressure gas discharged by the explosion-proof valve 10 on other electric devices in the battery, and allowing the explosion-proof valve 10 to release pressure better.

In the embodiment of the present application, when the internal and external pressure difference of the battery is large, the large pressure difference causes the fastening portion 1042 and the claw portion 1041 in the fastening structure 104 to be disconnected, the front cover 102 and the main body 101 are no longer connected by the fastening structure 104, and the first side 1021 of the front cover 102 is still hinged to the main body 101, so that the internal and external communication of the battery is performed while the front cover 102 is not completely separated from the main body 101, and the internal and external pressure difference of the battery is close to zero.

In some embodiments, the body 101 includes a first side wall 1011 hinged to the front cover 102, and a second side wall 1012 disposed opposite the first side wall 1011, the guide bar 103 being disposed closer to the second side wall 1012 relative to the first side wall 1011.

Referring to fig. 4 and 7, the first sidewall 1011 and the second sidewall 1012 are disposed on the main body 101, and since the guide rod 103 is disposed closer to the second sidewall 1012 than the first sidewall 1011, the pawl portion 1041 or the latching portion 1042 on the guide rod 103 is also disposed closer to the second sidewall 1012 than the first sidewall 1011.

In the technical solution of the embodiment of the present application, when the moving stroke of the first section 1031 in the guide bar 103 in the axis direction is not changed, the position of the guide bar 103 in the main body 101 affects the opening angle of the upper side of the front cover 102. Specifically, when the moving distance of the first section 1031 of the guide bar 103 is stabilized during the movement of the guide bar 103 from the intermediate position toward the second side wall 1012, the angle between the portion of the front cover 102 located on the upper side of the guide bar 103 and the main body 101 is gradually decreased. Therefore, the guide rod 103 is arranged at a position closer to the second side wall 1012, so that the included angle between the part of the front cover 102 above the guide rod 103 and the main body 101 can be reduced, more gas in the battery can be discharged from the opening of the front cover 102 below the guide rod 103, more high-pressure gas in the battery can be discharged downwards, and the influence of the high-pressure gas discharged by the explosion-proof valve 10 on other electric devices in the battery can be further reduced.

In some embodiments, the explosion-proof valve 10 further comprises a first seal 108 and a second seal 109. A first seal 108 is located between the front cover 102 and the main body 101. A second seal 109 is located on the side of the body 101 remote from the front cover 102.

A first seal 108 is located between the front cover 102 and the main body 101 and a second seal 109 is located between the main body 101 and the battery case. The first seal 108 and the second seal 109 may be seals of the same construction and/or material. For example, the first and

second seals

108 and 109 may be sealing strips, and the sealing strips may be disposed around edges of both side surfaces of the main body 101 connected to the front cover 102 and the battery case, respectively. The first and

second seals

108 and 109 may also be sealing frames, and the shape and size of the sealing frames correspond to the shape and size of the main body 101.

In the technical scheme of the embodiment of the application, the first sealing element 108 and the second sealing element 109 can increase the air tightness of the explosion-proof valve 10, prevent gas in the battery from leaking or prevent external gas from entering the battery, and reduce the probability of battery failure.

According to some embodiments of the present application, the first sealing element 108 and the second sealing element 109 are rubber or plastic.

In the embodiment of the present application, when the first sealing element 108 and the second sealing element 109 are rubber elements, the sealing performance inside the explosion-proof valve 10 can be improved, and the sealing elements are not easy to age, so that the service life is long. When the first sealing element 108 and the second sealing element 109 are plastic pieces, the shapes and the sizes of the first sealing element 108 and the second sealing element 109 can be changed according to the shapes and the sizes of the main body 101, and the processing technology is simple and the cost is low.

Embodiments of the second aspect of the present application provide a battery comprising the explosion-proof valve 10 of the embodiments of the first aspect described above, the explosion-proof valve 10 being provided on a housing of the battery.

In the explosion-proof valve 10 on the battery case provided in the embodiment of the present application, the explosion-proof valve 10 may be mounted on a case of the battery, and the inside of the explosion-proof valve 10 is communicated with the inside of the battery. When the air pressure inside the battery is greater than the air pressure outside the battery, the front cover 102 moves outwards to be opened under the action of the pressure difference between the inside and the outside of the battery, and the buckle structure 104 is driven to move along the axis direction of the guide rod 103, so that the air pressure inside the battery is released by opening the front cover 102, and the pressure difference between the inside and the outside of the battery is reduced. After the difference between the internal pressure and the external pressure of the battery is reduced, the snap structure 104 drives the front cover 102 to move backwards so that the front cover 102 is connected with the main body 101 again, and the inside of the battery is in a sealed state again. When the internal and external pressure difference of the battery is too large, the large pressure difference can enable the moving stroke of the front cover 102 to be large, the buckle structure 104 is enabled to be tripped under the action of large pulling force, the front cover 102 is not connected with the main body 101 through the buckle structure 104 any more, the internal and external of the battery are communicated at the moment, the internal and external pressure difference of the battery is close to zero, therefore, the pressure relief performance of the explosion-proof valve 10 is high, the probability of thermal failure of the battery can be reduced, and the safety performance of the battery is improved. In addition, when the inside of the battery needs to be maintained, the control structure 105 can control the buckle structure 104 to be disconnected, so that the front cover 102 can be opened, the inside of the battery can be maintained, and after the maintenance of the inside of the battery is completed, the buckle structure 104 can be reconnected through the control structure 105, and the maintenance difficulty of the inside of the battery can be reduced without damaging the explosion-proof valve 10.

Embodiments of the third aspect of the present application provide an electric device, where the electric device includes the battery in the embodiments of the second aspect, and the battery is used to provide electric energy to the electric device.

In the electric device according to the embodiment of the present application, since the electric device includes the battery, the electric device has all advantages of the battery. The powered device may be any of the aforementioned battery-powered devices or systems.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit of the embodiments of the present application, and they should be construed as being included in the scope of the claims and description of the present application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. This application is not intended to be limited to the particular embodiments disclosed herein but is to cover all modifications that are within the scope of the appended claims.

Claims

1. An explosion-proof valve, comprising:

the main body and the front cover are connected with the main body;

the guide rod is connected with the main body and is arranged in the main body;

the clamping structure comprises a clamping claw part arranged on the front cover and a clamping part arranged on the guide rod, and the clamping part can move along the axis direction of the guide rod, or the clamping structure comprises a clamping part arranged on the front cover and a clamping claw part arranged on the guide rod, and the clamping claw part can move along the axis direction of the guide rod and is clamped with the clamping claw part;

the control structure is arranged on one side, far away from the buckling structure, of the front cover and connected with the buckling structure, and the control structure is used for controlling the buckling part to be disconnected with the buckling part.

2. The explosion proof valve of claim 1 wherein said catch is provided on said front cover, said control structure being connected to said catch;

the clamping jaw portion comprises a first clamping hook and a second clamping hook which are oppositely arranged, the first clamping hook comprises a first end and a second end, the first end is located at one side, close to the main body, of the front cover, the second end is located at one side, far away from the main body, of the front cover, the second clamping hook comprises a third end and a fourth end, far away from the main body, of the front cover, the control structure comprises a second end and a fourth end, the second end is perpendicular to the axis direction of the guide rod, and the distance between the second end and the fourth end is adjustable.

3. The explosion-proof valve of claim 2 further comprising a fixed housing located on a side of the front cover away from the main body, wherein a portion of the latch portion located on the side of the front cover away from the main body is disposed in the fixed housing, and the second end and the fourth end are bent in a direction opposite to each other to protrude out of the fixed housing.

4. The explosion-proof valve of claim 1 wherein the latch portion is disposed on the front cover, the control structure being connected to the latch portion;

the clamping claw part comprises a third clamping hook and a fourth clamping hook which are oppositely arranged, and a gap is formed between the third clamping hook and the fourth clamping hook;

the clamping part is clamped with the third clamping hook and the fourth clamping hook, and the control structure is used for controlling the rotation of the clamping part so that the clamping part is arranged in the gap and is disconnected with the third clamping hook and the fourth clamping hook.

5. The explosion-proof valve of claim 1 wherein the guide rod comprises a first section and a second section connected with the first section, the first section is movable along its axis direction, and the claw portion or the buckling portion is disposed on a side of the first section away from the second section;

the explosion-proof valve further comprises an elastic element, the elastic element is connected with the first section and the second section, and the elastic element is sleeved on the outer side of the first section.

6. The explosion proof valve of claim 1 wherein said main body and said front cover are hingedly connected.

7. The explosion proof valve of claim 6 wherein said body includes a first sidewall hingedly connected to said front cover and a second sidewall disposed opposite said first sidewall, said guide rod being disposed closer to said second sidewall than to said first sidewall.

8. The explosion proof valve of claim 1 further comprising:

a first seal between the front cover and the main body;

a second seal located on a side of the body remote from the front cover.

9. A battery comprising an explosion-proof valve as claimed in any one of claims 1 to 8, said valve being provided on a housing of said battery.

10. An electric device, characterized in that the electric device comprises the battery of claim 9 for providing electric energy to the electric device.