Breathable valve, battery and terminal equipment

Abstract

The utility model provides a ventilation valve, a battery and terminal equipment, and relates to the technical field of air pressure adjustment. The ventilation valve is used for adjusting the internal air pressure of a battery and comprises a main body, the main body is provided with an internal space and comprises a first cover body, a second cover body and a side wall, the side wall comprises a ventilation channel, the ventilation channel penetrates through the side wall of the main body, and the second cover body is provided with a connecting hole used for connecting a battery cell of the battery; the pressure piston comprises a first sealing body, a second sealing body and a supporting body, the supporting body is connected between the first sealing body and the second sealing body, the pressure piston is arranged in the inner space, the inner space comprises a first cavity, the first cavity is located between the first sealing body and the second sealing body, and the first cavity is communicated with the outside through a ventilation channel. The corrosion influence of electrolyte on the pressure adjusting device can be reduced by using the pressure piston, the service life of the ventilation valve is prolonged, the ventilation channel arranged on the side wall of the main body can maintain the stability of the internal air pressure of the battery, and the whole structure is convenient to manufacture.

Description

Technical Field

[0001] The present application relates to the technical field of air pressure regulation, and in particular to a breathable valve, a battery and a terminal device. Background Art

[0002] During the use or testing of the battery, the charging and discharging behavior may cause additional gas to be generated inside the battery, affecting the normal use of the battery. In order to extend the service life of the battery, a breathable valve is generally provided to adjust the air pressure inside the battery. Such a breathable valve generally has a pressure regulating device composed of a metal spring inside; since the metal spring is easily corroded by the electrolyte inside the battery, it cannot be used for a long time. In addition, since the breathable valve assembly is in great demand, how to optimize its structural design for easy manufacturing is also a problem worthy of attention. Utility Model Content

[0003] In view of this, the present application provides a ventilation valve, a battery and a terminal device to extend the service life of the ventilation valve and optimize the internal structure of the ventilation valve.

[0004] In a first aspect, the present application provides a breathable valve for regulating the internal air pressure of a battery, comprising: a main body, having an internal space, comprising a first cover body, a second cover body and a side wall, the side wall comprising a breathable channel, the breathable channel runs through the side wall of the main body, the second cover body has a connecting hole, and is used to connect the battery cell; a pressure piston, comprising a first sealing body, a second sealing body and a supporting body, the supporting body is connected between the first sealing body and the second sealing body, the pressure piston is arranged in the internal space, the internal space comprises a first cavity, the first cavity is located between the first sealing body and the second sealing body, and the first cavity is connected to the outside through the breathable channel.

[0005] Optionally, the internal space also includes a second cavity, located between the second sealing body and the second cover body, and when the pressure piston is acted upon by the first internal air pressure of the battery, the first cavity is connected to the second cavity; or, when the pressure piston is acted upon by the second internal air pressure of the battery, the first cavity is not connected to the second cavity.

[0006] Optionally, the first cover body and the second cover body are sealed and connected, the side walls include a first side wall of the first cover body and a second side wall of the second cover body, the air permeable channel runs through the first side wall, and the cross-sectional size of the first sealing body matches the cross-sectional size of the first side wall; the cross-sectional size of the second sealing body matches the cross-sectional size of the second side wall, and the cross-sectional size of the second sealing body is smaller than the cross-sectional size of the first sealing body.

[0007] Optionally, the first cover body and the second cover body are sealed and connected via a set of corresponding threads; the set of corresponding threads includes a first thread arranged on the first cover body and a second thread arranged on the second cover body, and the first thread and the second thread match.

[0008] Optionally, the first thread is an internal thread and the second thread is an external thread.

[0009] Optionally, the air-permeable valve further includes: a first sealing ring, arranged around the first sealing body; and a second sealing ring, arranged around the second sealing body.

[0010] Optionally, a first groove is provided on the surface of the first sealing body for accommodating the first sealing ring; and a second groove is provided on the surface of the second sealing body for accommodating the second sealing ring.

[0011] Optionally, the first cover body and the second cover body are annular structures.

[0012] In a second aspect, a battery is provided, comprising: a shell including a first installation space; a battery cell arranged in the first installation space; the air valve of the first aspect above is arranged on the shell, and the first installation space is connected to the internal space of the air valve through the connecting hole of the air valve.

[0013] In a third aspect, a terminal device is provided, comprising the battery according to the second aspect.

[0014] In the above structure, the pressure piston is used as the pressure regulating device inside the breathable valve, which reduces the corrosion effect of the electrolyte on the pressure regulating device and prolongs the service life of the breathable valve. At the same time, the breathable channel is set on the side wall of the main body of the breathable valve to facilitate the discharge of the gas generated inside the battery and maintain the internal air pressure of the battery stable. In addition, the breathable valve includes a main body and a pressure piston, and does not require other devices; because of its simple structure, it uses the relationship between the air pressure and the size of the space in which it is located to achieve air pressure regulation, so it is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following is a brief introduction to the drawings used in describing the embodiments of the present application:

[0016] Figure 1 It is a structural schematic diagram of a breathable valve provided in an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the working state of a breathable valve provided in an embodiment of the present application;

[0018] Figure 3 This is a schematic diagram of the working state of another breathable valve provided in an embodiment of the present application;

[0019] Figure 4 This is a schematic diagram of the structure of a first cover body and a second cover body provided in an embodiment of the present application;

[0020] Figure 5 It is a structural schematic diagram of a pressure piston provided in an embodiment of the present application;

[0021] Figure 6It is a schematic diagram of the structure of a battery provided in an embodiment of the present application.

[0022] In the figure: 100 - first cover body, 110 - air permeable channel, 200 - second cover body, 210 - connecting hole, 300 - pressure piston, 310 - first sealing body, 320 - second sealing body, 330 - supporting body, 10 - housing, 11 - battery cell, 12 - air permeable valve. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. The accompanying drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other accompanying drawings and other implementation methods can be obtained based on these drawings without creative work. Adjustments and improvements made without departing from the concept of the present application are all within the scope of protection of the present application.

[0024] In order to simplify the drawings, only the parts related to the corresponding embodiments are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, only part of the components with the same structure or function in some figures are schematically drawn, and there may be more or fewer components with the same structure or function in reality.

[0025] In this application, unless otherwise clearly specified and limited, ordinal numbers, such as "first", "second", etc., are only used to distinguish and describe associated objects, and cannot be understood as indicating or implying the relative importance or order between associated objects; in addition, they do not represent the number of associated objects. "Multiple" includes two or more, and other quantifiers are similar. " / " is used to describe the relationship between associated objects, which indicates the "or" relationship between associated objects. "And / or" is used to describe the relationship between associated objects, which includes any combination relationship between associated objects, such as "a and / or b" includes: "alone a", "alone b", or "a and b". "One or more" or "at least one" in multiple objects refers to any object or any combination of multiple objects, such as "one or more of a1, a2, a3" or "at least one of a1, a2, a3" includes: "alone a1", "alone a2", "alone a3", "a1 and a2", "a1 and a3", "a2 and a3", or "a1, a2 and a3".

[0026] During the charge and discharge process of the battery, gas may be generated, for example, the process of electrolyzing water will generate hydrogen and oxygen. The above gas-generating reactions are more common in the charge and discharge process of secondary cells. Moreover, as the number of charging times increases, more and more gas is generated by the battery cells inside the battery, which in turn increases the pressure difference between the inside and outside of the battery cells, and the deformation of the battery cells also increases accordingly. In the prior art, a pressure regulating device made of a metal spring is generally used to adjust the air pressure inside the battery, but the metal spring is easily corroded by the electrolyte inside the battery. In the electrolyte, redox reactions may occur on the metal surface. For example, the metal surface may be oxidized to cations and release electrons into the electrolyte, thereby generating an anodic reaction. At the same time, the anions in the electrolyte may also be reduced, thereby generating a cathodic reaction. These reactions lead to corrosion of the metal surface. Some components in the electrolyte may have a direct corrosive effect on metals. For example, an electrolyte containing chloride ions (such as salt water) can cause a chlorination reaction on the metal surface to generate metal chloride, thereby causing corrosion. Other acidic or alkaline electrolytes may also corrode metals, such as sulfuric acid, nitric acid, hydrofluoric acid, etc. Therefore, if a pressure regulating device made of a metal spring is used, its service life is generally short and cannot be used for a long time. The present application redesigns the internal structure of the vent valve to optimize its service life.

[0027] Please refer to Figure 1 , which shows a schematic diagram of the structure of a breathable valve provided in an embodiment of the present application. Figure 1 As shown, the present application provides a breathable valve for regulating the internal air pressure of a battery, comprising: a main body, having an internal space, comprising a first cover body 100, a second cover body 200 and a side wall, the side wall comprising a breathable channel 110, the breathable channel 110 passes through the side wall of the main body, the second cover body 200 has a connecting hole 210, for connecting the battery cell; a pressure piston 300, comprising a first sealing body 310, a second sealing body 320 and a supporting body 330, the supporting body 330 is connected between the first sealing body 310 and the second sealing body 320, the pressure piston 300 is arranged in the internal space, the internal space comprises a first cavity, the first cavity is located between the first sealing body 310 and the second sealing body 320, and the first cavity is connected to the outside through the breathable channel 110.

[0028] In this embodiment, the air permeable channel 110 is arranged on the side wall of the main body so that the first cavity is connected to the outside; that is, the air pressure of the first cavity is the standard atmospheric pressure. According to the morphological difference of the main body of the breathable valve, the air permeable channel 110 can be arranged on the side wall of the first cover body 100, or on the side wall of the second cover body 200. The first cover body 100 and the second cover body 200 can be combined into one by different connection methods. For example, the first cover body 100 and the second cover body 200 can be connected by mortise and tenon to form the main body of the breathable valve; for another example, the first cover body 100 and the second cover body 200 can be connected by threaded connection to form the main body of the breathable valve. In addition, the number of air permeable channels 110 can also be set according to actual adjustment needs.

[0029] The pressure piston 300 is in the shape of an “I” character as a whole, and includes a first sealing body 310, a second sealing body 320 and a support body 330. The first sealing body 310 and the second sealing body 320 have a sealing function, and they can be sealing structures such as sealing rings or sealing strips. Among them, the first sealing body 310 and the second sealing body 320 define a certain volume in the internal space of the main body as a first cavity; since the first sealing body 310 and the second sealing body 320 have a sealing function, the first cavity is not connected to other cavities in the internal space when not in operation. Since the first cover body 100 and the second cover body 200 can be connected in different ways, the relative sizes of the first sealing body 310 and the second sealing body 320 are not fixed and can be freely set according to actual conditions.

[0030] The second cover 200 has a connection hole 210 for connecting the battery cell; that is, the air pressure at the connection hole 210 is the internal air pressure of the battery. During the use of the battery, as the internal air pressure of the battery continues to increase, the pressure piston 300 is pushed away from the battery, so that the space where the internal air pressure of the battery is located is expanded to adjust the internal air pressure of the battery. For example, when the pressure piston 300 moves a certain distance, the internal air pressure of the battery can be connected to the outside through the air permeable channel 110, so that the internal and external air pressures are consistent, thereby achieving the goal of adjusting the internal air pressure of the battery.

[0031] In the above structure, the pressure piston is used as the pressure regulating device inside the breathable valve, which reduces the corrosion effect of the electrolyte on the pressure regulating device and prolongs the service life of the breathable valve. At the same time, the breathable channel is set on the side wall of the main body of the breathable valve to facilitate the discharge of the gas generated inside the battery and maintain the internal air pressure of the battery stable. In addition, the breathable valve includes a main body and a pressure piston, and does not require other devices; because of its simple structure, it uses the relationship between the air pressure and the size of the space in which it is located to achieve air pressure regulation, so it is easy to manufacture.

[0032] In one embodiment, the internal space also includes a second cavity, which is located between the second sealing body and the second cover body. When the pressure piston is acted upon by the first internal air pressure of the battery, the first cavity is connected to the second cavity; or, when the pressure piston is acted upon by the second internal air pressure of the battery, the first cavity is not connected to the second cavity.

[0033] Please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of a working state of a breathable valve provided in an embodiment of the present application is shown. Figure 3 FIG. 2 is a schematic diagram showing another working state of a breathable valve provided in an embodiment of the present application. For the convenience of description, the space enclosed by the first sealing body 310 and the first cover body 100 in the internal space is referred to as the third cavity. Figure 2 and Figure 3 As shown, the third cavity is a sealed cavity and is not connected to the outside world. Before the breathable valve enters the working state, an inert gas, such as helium, neon, argon, krypton, xenon and radon, is injected into the third cavity so that the third cavity has an internal air pressure, and the initial value of the internal air pressure of the third cavity can be set according to actual needs. An optional implementation is: injecting an inert gas into the third cavity so that the internal air pressure of the third cavity is greater than or equal to 0.15MPa. Setting the gas inside the third cavity to an inert gas can make it difficult for chemical reactions to occur inside the third cavity, thereby increasing the working stability of the breathable valve. In addition, the initial height of the third cavity can be set to be greater than or equal to the initial height of the second cavity, so as to facilitate the manufacture of the breathable valve. The second cavity is located between the second sealing body 320 and the second cover body 200. Since the second cavity is connected to the battery through the connecting hole 210, the internal air pressure of the second cavity is equivalent to the internal air pressure of the battery.

[0034] When the internal air pressure of the battery increases, the internal air pressure of the second cavity pushes the pressure piston 300 to move away from the connecting hole 210. During this movement, the spatial volume of the second cavity increases, while the spatial volume of the third cavity decreases. According to Boyle's law: for a fixed amount of gas in a closed container, at a constant temperature, the pressure and volume of the gas are inversely proportional. Therefore, as the spatial volume of the third cavity is squeezed and reduced, the internal air pressure of the third cavity increases to balance the force on the pressure piston. According to the ideal gas state equation (Ideal Gas Law): pV=nRT; where: p is the pressure (Pa), V is the gas volume (m 3), T is temperature (K), n is the amount of gas (mol), and R is the molar gas constant (also called the universal gas constant) (J / (mol.K)). Since the battery charge and discharge process may produce additional gas, it may also produce additional heat to increase the temperature. Therefore, for the second cavity, the product of its internal air pressure and its volume continues to increase; and because the volume of the third cavity decreases, the volume of the second cavity increases. Therefore, as the charge and discharge process proceeds, the internal air pressure and volume of the second cavity are increasing.

[0035] When the internal pressure of the battery rises to a first internal pressure threshold, the pressure piston 300 is pushed to Figure 3 The position shown. At this time, the first cavity is connected to the second cavity, and the gas contained in the second cavity (that is, the gas generated during the charging and discharging process of the battery) is discharged to the outside through the air permeable passage 110, so that the internal air pressure of the second cavity is reduced, thereby regulating the internal air pressure of the battery. When the internal air pressure of the battery is lower than the first internal air pressure (that is, when it is at the second internal air pressure), the internal air pressure of the third cavity will squeeze the pressure piston 300 in the direction close to the connecting hole 210 until the internal air pressure of the third cavity is equal to the internal air pressure of the second cavity; at this time, the pressure piston 300 separates the second cavity from the air permeable passage 110, and the first cavity is not connected to the second cavity.

[0036] In one embodiment, the first cover body and the second cover body are sealingly connected, the side walls include a first side wall of the first cover body and a second side wall of the second cover body, the air permeable channel runs through the first side wall, the cross-sectional size of the first sealing body matches the cross-sectional size of the first side wall; the cross-sectional size of the second sealing body matches the cross-sectional size of the second side wall, and the cross-sectional size of the second sealing body is smaller than the cross-sectional size of the first sealing body.

[0037] The sealing connection between the first cover body and the second cover body includes connection methods such as threaded connection, interference fit and mortise and tenon. The side wall of the main body is composed of the side wall of the first cover body and the side wall of the second cover body. In order to improve the air tightness of the overall device of the breathable valve, each cavity in the internal space of the main body is separated by the first sealing body and the second sealing body of the pressure piston; wherein the cross-sectional size of the first sealing body matches the cross-sectional size of the first side wall, and the cross-sectional size of the second sealing body matches the cross-sectional size of the second side wall, so as to reduce the possibility of failure and leakage in each cavity. In addition, the cross-sectional size of the second sealing body can be set to be smaller than the cross-sectional size of the first sealing body, so that the diameter of the third cavity is larger than the diameter of the second cavity.

[0038] In one embodiment, the first cover body and the second cover body are sealingly connected by a set of corresponding threads; the set of corresponding threads includes a first thread arranged on the first cover body and a second thread arranged on the second cover body, and the first thread and the second thread match.

[0039] In some embodiments, the first thread can be set as an internal thread and the second thread can be set as an external thread; in other embodiments, the first thread can be set as an external thread and the second thread can be set as an internal thread. By means of threaded connection, the sealing connection process between the first cover body and the second cover body in the breathable valve can be simplified, saving manufacturing costs.

[0040] Please refer to Figure 4 , which shows a schematic diagram of the structure of a first cover and a second cover provided in an embodiment of the present application. Figure 4 As shown, the first thread is set as an internal thread, and the second thread is set as an external thread, and a set of threads matching each other are used for sealing connection, so that the main body of the air-permeable valve will not leak except the air-permeable channel 110 and the connecting hole 210, thereby improving the air tightness of the device. Figure 4 The structure shown can also reduce manufacturing costs, that is, there is no need to design a complicated sealing connection structure. In addition, the connection hole 210 of the second cover 200 can be designed as a circular hole as shown in the figure, or can be designed as other shapes according to the actual situation of the battery. The number of the connection holes 210 can also be freely set so that the internal air pressure of the battery can be transmitted to the second cavity through the connection holes 210.

[0041] In one embodiment, the breathable valve further includes: a first sealing ring, arranged around the first sealing body; and a second sealing ring, arranged around the second sealing body. The first sealing ring and the second sealing ring are additionally arranged on the basis of the first sealing body and the second sealing body, so as to better achieve a sealed connection (enhance the sealing performance) so that the gas in the breathable valve will not communicate with the outside through a position other than the breathable passage.

[0042] In some embodiments, a first groove is provided on the surface of the first sealing body for accommodating the first sealing ring; a second groove is provided on the surface of the second sealing body for accommodating the second sealing ring. Figure 5 , which shows a schematic diagram of the structure of a pressure piston provided in an embodiment of the application. Figure 5 As shown, a first groove is provided on the surface of the first sealing body 310, and a second groove is provided on the surface of the second sealing body 320. The size of the first sealing ring 311 matches the size of the first groove, and the size of the second sealing ring 312 matches the size of the second groove. By providing grooves on the surfaces of the first sealing body 310 and the second sealing body 320, the sealing ring can be well fixed on the surface of the sealing body to prevent the sealing ring from falling off. Figure 4Taking the threaded connection method shown in the figure as an example, the first cover body 100 has an internal thread and the second cover body 200 has an external thread; because the pressure piston 300 is placed inside the main body composed of the first cover body 100 and the second cover body 200, and the radius of the first cover body 100 is greater than the radius of the second cover body 200, the radius of the first sealing body 310 in the pressure piston 300 is greater than the radius of the second sealing body 320. The relative size of the first sealing body 310 and the second sealing body 320 depends on the size of the first cover body 100 and the second cover body 200 and the connection method, and is not limited to the case shown in the above example.

[0043] The above embodiments and drawings are all described assuming that the first cover body and the second cover body are annular structures. The annular structure can be a circular structure. At this time, the first sealing body and the second sealing body on the pressure piston are also annular structures, such as sealing discs; correspondingly, the first groove and the second groove respectively arranged on the two sealing bodies are also annular grooves, and the first sealing ring and the second sealing ring are also annular sealing rings that match the first groove and the second groove respectively. Setting the first cover body and the second cover body as annular structures allows the first cover body and the second cover body to be sealed through a commonly used threaded connection; if the first cover body and the second cover body are other structures, additional customized structures may be involved for sealingly connecting them. In addition, since the annular structure is a common structure, various accessories do not need to be additionally customized, which can reduce the manufacturing cost.

[0044] It should be noted that the annular structure of the first cover body and the second cover body is an optional embodiment. In addition to the annular structure, they can also be other structures, such as square or other polygons. When the first cover body and the second cover body are structures other than annular, the structure of the pressure piston disposed therein may also be changed to adapt to the main structure of the breathable valve.

[0045] Based on similar technical concepts, the present application provides a battery, comprising: a shell, comprising a first installation space; a battery cell, arranged in the first installation space; the air valve provided in the above embodiments is arranged on the shell, and the first installation space is connected to the internal space of the air valve through the connecting hole of the air valve.

[0046] Please refer to Figure 6 , which shows a schematic diagram of the structure of a battery provided in an embodiment of the present application. Figure 6 As shown, the battery includes a housing 10, a battery cell 11 disposed inside the housing 10, and a vent valve 12 disposed on the housing; the specific implementation of the vent valve 12 can refer to the above embodiment, which will not be repeated here. Figure 6The position indicated by the dotted line is the position of the connection hole of the breathable valve 12, and the battery cell 11 in the first installation space is connected to the breathable valve 12 through the connection hole. In some other embodiments, the battery may include multiple installation spaces inside, such as the second installation space, the third installation space, etc., each installation space includes a certain number of battery cells, and these battery cells are connected to the breathable valve through the connection hole; in this case, the number of connection holes can be set to multiple, corresponding to each installation space, so that the installation of the battery can be facilitated. In addition, multiple breathable valves can be set on the outer shell, and each breathable valve corresponds to an installation space, which has improved the effect of air pressure regulation. The number of breathable valves and the number of installation spaces can be set according to actual needs, and there is no restriction here.

[0047] Based on similar technical concepts, the present application provides a terminal device, including the battery provided in the above embodiments. The terminal device can be a means of transportation, such as a new energy vehicle equipped with a large number of batteries; the terminal device can also be some electronic devices or energy storage devices including batteries. These terminal devices use the batteries provided in the above embodiments, which can effectively extend the service life of the battery and reduce the impact of the gas generated during the battery charging and discharging process on the battery.

[0048] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. In addition, the above embodiments can be freely combined as needed.

Claims

1. A vent valve, characterized in that: Used to regulate the internal gas pressure of the battery, including: A main body having an internal space, comprising a first cover, a second cover and a side wall, wherein the side wall comprises a ventilation channel, the ventilation channel runs through the side wall of the main body, and the second cover has a connection hole for connecting the battery cell of the battery; The pressure piston comprises a first sealing body, a second sealing body and a supporting body, wherein the supporting body is connected between the first sealing body and the second sealing body, and the pressure piston is arranged in the internal space, wherein the internal space comprises a first cavity, wherein the first cavity is located between the first sealing body and the second sealing body, and the first cavity is connected to the outside through the air permeable passage.

2. The breathable valve according to claim 1, characterized in that: The internal space also includes a second cavity located between the second sealing body and the second cover body. When the pressure piston is acted upon by the first internal air pressure of the battery, the first cavity is connected to the second cavity; or, when the pressure piston is acted upon by the second internal air pressure of the battery, the first cavity is not connected to the second cavity.

3. The breathable valve according to claim 1, characterized in that: The first cover body and the second cover body are sealed and connected, the side wall includes a first side wall of the first cover body and a second side wall of the second cover body, the air permeable channel runs through the first side wall, and the cross-sectional size of the first sealing body matches the cross-sectional size of the first side wall; The cross-sectional dimension of the second sealing body matches the cross-sectional dimension of the second side wall, and the cross-sectional dimension of the second sealing body is smaller than the cross-sectional dimension of the first sealing body.

4. The breathable valve according to claim 3, characterized in that: The first cover body and the second cover body are sealed and connected by a set of corresponding threads; The group of corresponding threads includes a first thread provided on the first cover body and a second thread provided on the second cover body, and the first thread matches the second thread.

5. The breathable valve according to claim 4, characterized in that: The first thread is an internal thread, and the second thread is an external thread.

6. The breathable valve according to claim 1, characterized in that: Also includes: A first sealing ring, arranged around the first sealing body; The second sealing ring is arranged around the second sealing body.

7. The breathable valve according to claim 6, characterized in that: A first groove is provided on the surface of the first sealing body for accommodating the first sealing ring; A second groove is provided on the surface of the second sealing body for accommodating the second sealing ring.

8. The breathable valve according to any one of claims 1 to 7, characterized in that: The first cover body and the second cover body are annular structures.

9. A battery, characterized in that: include: A housing including a first installation space; A battery cell, arranged in the first installation space; The air valve according to any one of claims 1 to 8 is arranged on the outer shell, and the first installation space is connected to the internal space of the air valve through the connecting hole of the air valve.

10. A terminal device, characterized in that: A battery comprising the battery of claim 9.

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