CN221170910U - Ventilation valve, battery pack and vehicle - Google Patents

Abstract

The application relates to a ventilation valve, a battery pack and a vehicle. The air-permeable valve comprises a valve body, a valve core and an adapter, wherein the valve body is provided with an inner hole which penetrates through the valve core, the valve core penetrates through the inner hole and is exposed out of the other side of the valve body, the valve core is elastically connected with the valve body, the valve core is provided with a through hole which penetrates through, the adapter is fixed on one side, far away from the valve body, of the valve core, the adapter is detachably connected with the valve core, and the adapter comprises a waterproof air-permeable membrane which is used for shielding the through hole. According to the air-permeable valve, the adapter comprising the waterproof air-permeable membrane is arranged, and the adapter is detachably connected with the valve core, so that the waterproof air-permeable membrane can be replaced, the air-permeable valve is convenient to maintain, and the maintenance cost is reduced.

Description

Ventilation valve, battery pack and vehicle

Technical Field

The application relates to the field of air-permeable valves, in particular to an air-permeable valve, a battery pack comprising the air-permeable valve and a vehicle comprising the battery pack.

Background

In the prior art, a ventilation valve is usually arranged on a battery pack, so that the internal environment and the external environment of the battery pack can realize air pressure balance through the ventilation valve, and simultaneously when the internal air pressure is overlarge, the opening degree can be increased to realize pressure relief of the internal environment of the battery pack.

In order to reduce the possibility of external impurities entering the battery pack while ensuring the air pressure balance function, a waterproof and breathable film is generally arranged in the breathable valve. However, the waterproof and breathable membrane is normally directly fixed to the valve core, because impurities blocked by the waterproof and breathable membrane affect the waterproof and breathable properties of the waterproof and breathable membrane. When the waterproof breathable film performance is reduced, the whole breathable valve is generally required to be replaced, so that resource waste is caused, and maintenance cost is increased.

Disclosure of utility model

In view of the above-described shortcomings of the prior art, an object of the present application is to provide a vent valve for reducing maintenance costs, a battery pack including the vent valve, and a vehicle including the battery pack. The method specifically comprises the following technical scheme:

In a first aspect, an embodiment of the application provides a breather valve, which comprises a valve body, a valve core and an adapter, wherein the valve body is provided with a through hole, the valve core penetrates through the hole and is exposed out of the other side of the valve body and is elastically connected with the valve body, the valve core is provided with a through hole, the adapter is fixed on one side of the valve core far away from the valve body, the adapter is detachably connected with the valve core, and the adapter comprises a waterproof breather membrane which is used for shielding the through hole.

According to the air-permeable valve, the inner hole is formed in the valve body, the through hole penetrating through the valve core is formed in the valve core, and the valve core extends into the inner hole and is elastically connected with the valve body, so that gas at two opposite sides of the air-permeable valve can be exchanged through the through holes, and when air pressure difference exists at two sides of the air-permeable valve, the air pressure balancing function of the air-permeable valve can be realized through the through holes.

The air-permeable valve is further provided with the adapter which is detachably connected with the valve core, and the waterproof air-permeable film is arranged on the adapter, so that when the performance of the waterproof air-permeable film is reduced, the waterproof air-permeable film can be replaced by replacing the adapter, and the maintenance cost of the air-permeable valve is reduced while the blocking performance of the waterproof air-permeable film of the air-permeable valve to impurities is ensured.

In one embodiment, the adapter further comprises a main body section and a connecting section, wherein the main body section is fixed between the waterproof breathable film and the connecting section, and the connecting section stretches into the through hole and is detachably connected with the inner wall of the through hole.

In one embodiment, the adapter is further provided with a communication hole penetrating the main body section and the connecting section, the communication hole comprises a first opening and a second opening which are opposite, the first opening is located on the main body section, the second opening is located on the connecting section, and the area of the first opening is larger than that of the second opening.

In one embodiment, the adapter is annular and surrounds the outer edge of the through hole.

In one embodiment, the valve body is provided with at least one air guide hole positioned at the outer edge of the inner hole; the ventilation valve further comprises an elastic piece and a fixing piece, the valve core comprises a core rod and a core cover which are fixedly connected, the core rod penetrates into the inner hole and is exposed out of the other side of the valve body, the fixing piece is fixed at one end, far away from the core cover, of the core rod, the elastic piece is sleeved on the outer edge of the core rod and abuts against the position between the valve body and the fixing piece, the core cover is used for shielding at least one air guide hole, and the through hole penetrates through the core cover and the core rod.

In one embodiment, the surface of the valve body, which is close to the core cover, is convexly provided with an annular side wall, and the air-permeable valve further comprises a protective cover, wherein the protective cover is fixed on the annular side wall so as to accommodate and protect the core cover and the adapter in cooperation with the annular side wall; at least one air hole is arranged in the protective cover so as to be communicated with the two sides of the protective cover.

In one embodiment, a gap is left between the core cover and the annular side wall, and the gap is used for communicating the air vent and the air vent when the core cover opens the air vent.

In one embodiment, the distance between the waterproof and breathable membrane and the protective cover is greater than the sliding distance of the core cover relative to the valve body along the sliding direction of the core cover.

In one embodiment, the protective cover comprises a cover plate and a side plate, wherein the side plate is arranged on the outer edge of the cover plate in a surrounding mode and is connected with the annular side wall, and the ventilation holes penetrate through the side plate and/or the cover plate.

In one embodiment, a first sealing ring is arranged between the valve body and the core cover, the first sealing ring surrounds the outer edge of at least one air guide hole, and the first sealing ring is used for sealing the end face contacted between the core cover and the valve body; and/or, one side of the valve body, which is away from the core cover, is provided with a second sealing ring, the second sealing ring surrounds the outer wall of the valve body, and the second sealing ring is used for sealing a mounting surface between the valve body and an external structure.

In a second aspect, an embodiment of the application provides a battery pack, which comprises a battery tray and an air ventilation valve, wherein the battery tray is provided with an air vent, and a valve body of the air ventilation valve is embedded in the air vent.

In a third aspect, an embodiment of the present application provides a vehicle including a vehicle body, and a battery pack, the battery pack being accommodated in the vehicle body.

It will be appreciated that, since the vehicle provided in the third aspect of the present application and the battery pack provided in the second aspect of the present application both employ the breather valve provided in the first aspect of the present application, it also has the advantage of reducing maintenance costs.

Drawings

FIG. 1 is an exploded schematic view of a ventilation valve provided in one embodiment of the present application;

FIG. 2 is a schematic diagram of a ventilation valve according to an embodiment of the present application;

FIG. 3 is a schematic view of a breather valve according to an embodiment of the present application in a first state;

FIG. 4 is a partially exploded schematic illustration of a breather valve provided in one embodiment of the present application;

FIG. 5 is a schematic view of a partial structure of a breather valve provided in an embodiment of the present application;

FIG. 6 is a schematic view of a breather valve according to an embodiment of the present application in a second state;

FIG. 7 is a schematic view of a breather valve according to an embodiment of the present application in a third state;

FIG. 8 is a schematic diagram of a protective cover according to an embodiment of the present application;

FIG. 9 is a schematic diagram of another structure of a protective cover according to an embodiment of the present application;

Fig. 10 is a schematic structural view of a valve body according to an embodiment of the present application.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the application. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the application may be practiced. The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present application are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present application, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprises," "comprising," "includes," "including," or "having," when used in this specification, are intended to specify the presence of stated features, operations, elements, etc., but do not limit the presence of one or more other features, operations, elements, etc., but are not limited to other features, operations, elements, etc. Furthermore, the terms "comprises" or "comprising" mean that there is a corresponding feature, number, step, operation, element, component, or combination thereof disclosed in the specification, and that there is no intention to exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

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 in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The application provides a vehicle, which comprises a vehicle body and a battery pack. The battery pack is accommodated in the vehicle body to provide electric energy for the vehicle. It will be appreciated that the battery pack may be used in other locations where electrical energy is required, and the application is not particularly limited in this regard.

The application provides a battery pack, which comprises a battery tray, a battery module and a ventilation valve. Wherein, the battery module is acceptd in the battery tray, is provided with the air vent on the battery tray, and the air vent runs through the battery tray in order to realize the intercommunication of battery tray internal environment and external environment. The valve body of the ventilation valve is embedded in the ventilation hole, so that the possibility that external impurities enter the battery tray through the ventilation hole is reduced.

Because the heat generated by the battery module can cause the pressure of the internal environment of the battery tray to be increased in the operation process of the battery pack. Meanwhile, when the battery module fails, high-pressure gas may be released to the internal environment of the battery tray. When the internal environment pressure of the battery tray is higher than the external environment pressure, the internal air of the battery tray can be released to the external environment through the through holes in the ventilation valve, so that the internal and external environment pressure of the battery tray is balanced. The explosion phenomenon of the battery pack is avoided, which is caused by the overlarge internal pressure of the battery tray, so that the use safety of the battery pack is ensured.

On the other hand, when the temperature of the external environment of the battery tray is too high or the temperature of the internal environment of the battery tray is too low, the pressure of the internal environment of the battery tray may be caused to be less than that of the external environment. The air of the external environment can flow into the internal environment through the through holes in the ventilation valve, so that the pressure of the internal environment and the external environment of the battery tray is balanced.

It can be understood that the ventilation valve is arranged in the battery tray when external impurities are reduced and enter the battery tray through the ventilation holes, and when the air pressure difference exists in the internal environment and the external environment of the battery tray, the air in the internal environment or the air in the external environment is led into the external environment or the internal environment through the through holes in the ventilation valve, so that the air pressure balance of the internal environment and the external environment is realized.

For convenience of description, the valve body of the ventilation valve is embedded in the ventilation hole, and one side of the valve body of the ventilation valve, which is far away from the core cover, is the internal environment of the battery tray, and one side of the core cover, which is far away from the valve body, is the external environment of the battery tray. It will be appreciated that in other embodiments, the ventilation valve may be used in other situations where it is desirable to regulate the pressure of the internal and external environment. The present application is not particularly limited thereto.

Referring to fig. 1, an exploded schematic view of a breather valve 100 according to an embodiment of the present application is shown, and referring to fig. 2, a schematic view of a breather valve 100 according to an embodiment of the present application is shown. For convenience of description, the axial direction of the through hole 23 is set to a first direction 001 in fig. 2 and the subsequent drawings, and the second direction 002 is perpendicular to the first direction 001.

As shown in fig. 1 and 2, the ventilation valve 100 of the present application includes a valve body 10, a valve core 20, an elastic member 31, and a fixing member 32. The valve body 10 is provided with an inner hole 11 and an air vent 12 which penetrate through, and the air vent 12 is arranged at the outer edge of the inner hole 11.

The valve core 20 includes a core cover 21 and a core rod 22, the core cover 21 is located at one side of the valve body 10, one end of the core rod 22 is fixed at one side of the core cover 21 facing the valve body 10, and the other end of the core rod 22 passes through the inner hole 11 and is partially exposed at the other side of the valve body 10.

The elastic member 31 is located at a side of the valve body 10 away from the core cap 21, and is sleeved on the outer periphery of the core rod 22. The fixing member 32 is fixed to an end of the core rod 22 away from the core cap 21, and one end of the elastic member 31 abuts against the fixing member 32, and the other end is connected to the valve body 10. It will be appreciated that the valve core 20 is slidable relative to the valve body 10 in the first direction 001 to open the gas vent hole 12 so that gas on opposite sides of the valve core 20 can be interchanged via the gas vent hole 12 and the gap between the core cover 21 and the valve body 10. To achieve pressure equalization on opposite sides of the spool 20.

As shown in fig. 1 and 2, the elastic member 31 may be provided as a compression spring. The valve body 10 of the ventilation valve 100 according to the present application is fixed to an external structure. It will be appreciated that the elastic force of the elastic member 31 directly acts on the valve body 10 and the fixing member 32, and makes the core rod 22 slide along the first direction 001, so as to drive the core cover 21 to slide toward the valve body 10 until the core cover 21 contacts with the valve body 10, thereby shielding the air guide hole 12.

That is, the arrangement of the elastic member 31 ensures the contact between the core cover 21 and the valve body 10 in the natural state, thereby ensuring the shielding effect of the core cover 21 on the air guide hole 12, preventing the opposite sides of the valve core 20 from being conducted through the gap between the core cover 21 and the valve body 10 and the air guide hole 12 in the natural state, and further improving the blocking effect of the ventilation valve 100 of the present application on the impurities in the environments of the opposite sides of the ventilation valve 100.

When the ventilation valve 100 of the present application is mounted to the battery pack, and when the air pressure of the internal environment of the battery pack is greater than the air pressure of the external environment, the high-pressure air of the internal environment acts on the core cover 21 via the air guide hole 12.

As shown in fig. 3, when the pressure of the internal environment is too high and the force of the high-pressure gas applied to the core cover 21 is greater than the sum of the elastic force provided by the elastic member 31 and the gravity of the valve core 20 and other structures, the core cover 21 slides in the first direction 001 away from the valve body 10 under the action of the high-pressure gas to open the air guide hole 12. So that the high-pressure gas can be outwardly diffused through the gas-guide hole 12 and the gap between the core cover 21 and the valve body 10 in order to reduce the gas pressure of the internal environment.

It will be appreciated that as the gas release process proceeds, the gas pressure of the internal environment is gradually reduced, such that the gas pressure difference between the internal environment and the external environment is gradually reduced, such that the sliding speed of the core cover 21 in the first direction 001 is reduced toward the direction away from the valve body 10. When the force exerted on the core cover 21 by the high-pressure gas in the internal environment is smaller than the sum of the elastic force provided by the elastic member 31 and the gravity of the valve core 20 and other structures, the core cover 21 slides in the direction approaching the valve body 10 along the first direction 001 under the action of the elastic member 31 until the core cover 21 contacts with the valve body 10, so as to realize shielding of the air guide hole 12 by the core cover 21.

At this time, the elastic member 31 is in a natural state, and the air pressure difference between the internal environment and the external environment of the air-permeable valve 100 is relatively small, or the air pressure is balanced. Thereby realizing the air pressure balancing function of the ventilation valve 100 of the present application.

It can be understood that the valve core 20 capable of sliding relative to the valve body 10 is provided, so that the valve core 20 can open the air guide hole 12 under the condition of overlarge internal environment pressure, thereby realizing rapid pressure relief of the internal environment, avoiding explosion caused by overlarge internal environment pressure, and realizing the explosion-proof function of the ventilation valve 100.

In this embodiment and the subsequent embodiments, the outer edge of a certain structure is provided with other structures, the newly arranged structure is shown to be located on the plane where the structure is located, and the newly arranged structure is spaced from the structure. When there are a plurality of newly arranged structures, the plurality of newly arranged structures can be regarded as being circumferentially arranged and spaced apart from the structure. Illustratively, the outer edge of the bore 11 is provided with at least one air-guiding hole 12. That is, the inner hole 11 and the air vent 12 are arranged on the same plane, and the inner hole 11 and the air vent 12 are arranged at intervals. When the number of the air holes 12 is plural, it can be regarded that the plurality of air holes 12 surround the periphery of the inner hole 11.

Referring to fig. 4, a schematic diagram of a partial exploded view of a breather valve 100 according to an embodiment of the present application is shown, and referring to fig. 5, a schematic diagram of a partial structure of a breather valve 100 according to an embodiment of the present application is shown. And with reference to fig. 2.

As shown in fig. 2, 4 and 5, the ventilation valve 100 of the present application further includes an adapter 40. The adapter 40 comprises a waterproof and breathable membrane 41, a body section 42 and a connecting section 43. Wherein, the main body section 42 is connected with the connecting section 43, and the waterproof and breathable film 41 is fixed on the surface of the main body section 42 far away from the connecting section 43.

The valve core 20 is provided with a through hole 23, and the through hole 23 penetrates through the core cover 21 and the core rod 22. The main body section 42 is located on the side of the core cap 21 remote from the core rod 22, and the connecting section 43 extends into the through hole 23 and is detachably connected with the inner wall of the through hole 23.

Meanwhile, the adaptor 40 is further provided with a communication hole 44, the communication hole 44 penetrates through the main body section 42 and the connecting section 43, and the waterproof and breathable film 41 is fixed on the main body section 42 and shields the communication hole 44. The waterproof and breathable film 41 has pores (not shown) therein, which are spaced apart more than gas molecules and less than liquid molecules and solid molecules. It will be appreciated that the waterproof and breathable membrane 41 is capable of blocking the passage of liquid and solid impurities through the waterproof and breathable membrane 41 while ensuring the breathable effect on the opposite sides. Thereby enabling the opposite sides of the waterproof and breathable film 41 to exchange gas, and further enabling the gas at the opposite sides of the breathable valve 100 to exchange through the waterproof and breathable film 41, the through holes 23 and the communication holes 44.

Wherein, when the ventilation valve 100 of the present application is mounted to the battery pack, and when the air pressure of the internal environment of the battery pack is less than the air pressure of the external environment, the high pressure of the external environment may enter the ventilation valve 100. As shown in fig. 6, high-pressure gas of the external environment may pass through the waterproof and breathable film 41 and enter the internal environment via the communication hole 44 and the through hole 23 in order to increase the gas pressure of the internal environment.

It will be appreciated that as the process of the external air entering the internal environment proceeds, the air pressure of the internal environment is gradually increased, so that the air pressure difference between the internal environment and the external environment is gradually reduced, and thus the amount of air entering the internal environment through the waterproof breathable film 41, the communication hole 44, and the through hole 23 is reduced. Until the air pressure of the internal environment and the air pressure of the external environment are balanced. Thereby realizing the air pressure balancing function of the ventilation valve 100 of the present application.

On the other hand, when the air pressure of the internal environment of the battery pack is greater than the air pressure of the external environment, the high pressure of the internal environment may enter the ventilation valve 100. As shown in fig. 7, the high pressure gas of the internal environment may be sequentially discharged to the external environment through the waterproof and breathable film 41 via the through hole 23 and the communication hole 44 to reduce the gas pressure of the internal environment.

It will be appreciated that as the process of releasing the internal gas to the external environment proceeds, the gas pressure of the internal environment is gradually reduced, so that the gas pressure difference between the internal environment and the external environment is gradually reduced, and thus the amount of gas released to the external environment through the through-holes 23, the communication holes 44, and the waterproof and breathable film 41 is reduced. Until the air pressure of the internal environment and the air pressure of the external environment are balanced. Thereby realizing the air pressure balancing function of the ventilation valve 100 of the present application.

On the other hand, when the air pressure of the internal environment of the battery pack is much greater than the air pressure of the external environment and the valve body 10 is slid by the valve body 20 and the air vent hole 12 is opened, as shown in fig. 3, the high-pressure air of the internal environment may be released to the external environment through the air vent hole 12 and the gap between the core cover 21 and the valve body 10, and simultaneously released to the external environment through the through hole 23 and the communication hole 44 in sequence and through the waterproof and breathable film 41 to reduce the air pressure of the internal environment. Until the air pressure of the inner environment and the air pressure of the outer environment are balanced, thereby realizing the air pressure balancing function of the ventilation valve 100 of the present application.

When the air pressure of the internal environment and the air pressure of the external environment are balanced, the air of the internal environment can pass through the through hole 23, the communication hole 44 and the waterproof and breathable film 41 in order in a freely diffused form to enter the external environment, and the air of the external environment can also pass through the waterproof and breathable film 41, the communication hole 44 and the through hole 23 in order in a freely diffused form to enter the internal environment. Thereby achieving gas exchange between the internal environment and the external environment.

Since the waterproof and breathable film 41 has a function of blocking the passage of liquid and solid impurities. With the use of the waterproof and breathable film 41, the barrier effect of the waterproof and breathable film 41 against liquid and solid impurities and the penetrating effect against gas are gradually reduced. It can be appreciated that the waterproof and breathable film 41 is disposed on the adapter 40 detachably connected to the valve core 20, so that when the performance of the waterproof and breathable film 41 is reduced, the waterproof and breathable film 41 can be replaced by replacing the adapter 40, thereby reducing the maintenance cost of the breathable valve 100 of the application.

Therefore, compared with the ventilation valve with the performance of directly replacing the waterproof ventilation membrane reduced in the prior art, the ventilation valve 100 of the application has the advantages that the adapter 40 comprising the waterproof ventilation membrane 41 is arranged, and the adapter 40 is detachably connected with the valve core 20, so that the gas exchange between the two sides of the ventilation valve 100 can be realized through the through holes 23, the communication holes 44 and the waterproof ventilation membrane 41, and meanwhile, the replacement of the waterproof ventilation membrane 41 can be realized through the replacement of the adapter 40 when the performance of the waterproof ventilation membrane 41 is reduced, thereby being convenient for maintaining the ventilation valve 100 of the application, and reducing the maintenance cost of the ventilation valve 100 of the application.

In one embodiment, the waterproof breathable membrane 41 may be made of an expanded polytetrafluoroethylene material.

In one embodiment, as shown in fig. 4 and 5, the communication hole 44 includes opposite first and second openings 441 and 442. The first opening 441 is located on the main body section 42, and the waterproof and breathable film 41 is shielded from the first opening 441. The second opening 442 is located on the connecting section 43. Wherein the area of the first opening 441 is larger than the area of the second opening 442.

When the ventilation valve 100 of the present application is provided on the battery pack, and when the pressure of the internal environment of the battery pack is greater than the pressure of the external environment, the internal high-pressure gas can enter the second opening 442 via the through-hole 23 and be released from the first opening 441 to the external environment through the waterproof and breathable film 41. It can be appreciated that the first opening 441 having an area larger than that of the second opening 442 is provided, so that the high-pressure gas can flow along the first direction 001 through the second opening 442 toward the first opening 441 and can diffuse along the second direction 002, thereby reducing the impact of the high-pressure gas on the waterproof breathable film 41 and avoiding the breakage of the waterproof breathable film 41 caused by excessive air pressure in the internal environment. Further, the service life of the waterproof breathable film 41 is prolonged, and the service life of the breathable valve 100 is prolonged.

Meanwhile, the first opening 441 is shielded based on the waterproof and breathable film 41, and the breathable amount of the waterproof and breathable film 41 per unit area is limited. It can be appreciated that the provision of the first opening 441 having an area larger than that of the second opening 442 can increase the overall area of the waterproof and breathable film 41, thereby increasing the overall breathable amount of the waterproof and breathable film 41 while ensuring the barrier effect of the waterproof and breathable film 41 of the present application against liquid and solid impurities. The gas exchange time at the two sides of the waterproof and breathable membrane 41 is prevented from being increased due to the fact that the waterproof and breathable membrane 41 is too small, and the ventilation rate of the ventilation valve 100 is further improved.

In one embodiment, as shown in fig. 4 and 5, the connection section 43 is detachably connected to the inner wall of the through hole 23 by screw connection. It will be appreciated that in other embodiments, the connection section 43 may be detachably connected to the inner wall of the through hole 23 by other connection means.

In one embodiment, as shown in fig. 2, 4 and 5, the surface of the valve body 10 adjacent to the core cover 21 is convexly provided with an annular side wall 13, and the core cover 21, the waterproof and breathable film 41 and the main body section 42 are all accommodated in the annular side wall 13. Wherein, in the second direction 002, there is a gap between the outer surface of the core cover 21 and the inner wall of the annular sidewall 13. It will be appreciated that, as shown in fig. 3, when the gas vent hole 12 is opened by the core cover 21, the high-pressure gas of the internal environment, when released to the gap between the core cover 21 and the valve body 10 in the first direction 001 via the gas vent hole 12, may also diffuse to the gap between the outer surface of the core cover 21 and the inner wall of the annular side wall 13 in the second direction 002 and be released to the external environment via the gap. Thereby ensuring conduction between the internal environment and the external environment.

In one embodiment, as shown in fig. 4 and 5, the core cover 21 is further provided with a first mounting groove 24, and the first mounting groove 24 is disposed on a surface of the core cover 21 facing the valve body 10 and located at an outer edge of the core cover 21. The ventilation valve 100 of the present application further includes a first sealing ring 60, where the first sealing ring 60 is fixed in the first mounting groove 24 and partially exposes the first mounting groove 24.

When the core cover 21 slides with respect to the valve body 10, the first seal ring 60 may slide with the sliding of the core cover 21. When the core cover 21 is in contact with the valve body 10, the first seal ring 60 is also in contact with the surface of the valve body 10 facing the core cover 21, thereby achieving sealing of the end face of the contact between the core cover 21 and the valve body 10. It is avoided that the internal environment is communicated with the external environment via the gap between the core cover 21 and the valve body 10 when the core cover 21 shields the air guide hole 12. The sealing performance of the ventilation valve 100 of the present application is improved.

It will be appreciated that in another embodiment, the first mounting groove 24 may also be provided on the surface of the valve body 10 facing the core cover 21.

In one embodiment, the adaptor 40 may be annular and fixed on the core cover 21, and surrounds the outer edge of the through hole 23. The waterproof and breathable film 41 is disposed on the end surface of the adapter 40 facing away from the core cover 21, and shields the through hole 23.

Referring to fig. 8, a schematic structure of a protective cover 50 according to an embodiment of the application is shown and described with reference to fig. 2.

As shown in fig. 2 and 8, the ventilation valve 100 of the present application further includes a protection cover 50, and the protection cover 50 is fixed to the annular sidewall 13.

The side of the adapter 40 facing away from the core cover 21 is in communication with the outside environment, whereas the waterproof and breathable membrane 41 is relatively thin and is easily scratched by external forces. It can be appreciated that the arrangement of the protective cover 50 reduces the possibility that impurities with larger mass in the external environment enter the ventilation valve 100, reduces the damage of the impurities in the external environment to the waterproof ventilation membrane 41, further ensures the blocking effect of the waterproof ventilation membrane 41 on liquid and solid impurities and the permeation effect of the waterproof ventilation membrane 41 on gas, and ensures the blocking effect of the ventilation valve 100 on the liquid and solid impurities. The use safety of the battery pack is ensured.

In one embodiment, as shown in fig. 8, the protecting cover 50 includes a cover plate 51 and a side plate 52, wherein the side plate 52 is enclosed on the outer edge of the cover plate 51 and connected with the annular side wall 13, the cover plate 51 is provided with a ventilation hole 53 penetrating therethrough, and the ventilation hole 53 is communicated with the external environment and the side of the adapter 40 away from the core cover 21. It is understood that the internal environment and the external environment may communicate via the ventilation holes 53, the communication holes 44, and the through holes 23.

Specifically, as shown in fig. 6, when the air pressure of the external environment is greater than that of the internal environment, the high-pressure air of the external environment may pass through the waterproof breathable film 41 and the communication hole 44 via the ventilation hole 53 into the through hole 23, thereby entering the internal environment to achieve the air pressure balance between the internal environment and the external environment.

As shown in fig. 7, when the air pressure of the internal environment is greater than that of the external environment, the high-pressure air of the internal environment may pass through the waterproof and breathable film 41 sequentially via the through holes 23 and the communication holes 44 and be output into the external environment through the ventilation holes 53, thereby achieving the air pressure balance between the internal environment and the external environment.

As shown in fig. 3, when the air pressure of the internal environment is much greater than that of the external environment and the air vent hole 12 is opened, the high-pressure air of the internal environment is discharged to the external environment through the vent hole 53 while being diffused outwardly through the air vent hole 12 and the gap between the core cover 21 and the valve body 10, and the internal high-pressure air also passes through the waterproof and breathable film 41 through the through hole 23 and the communication hole 44. Thereby achieving an air pressure balance between the internal environment and the external environment.

Thus, the arrangement of the protective cover 50 and the ventilation holes 53 on the cover plate 51 can reduce the possibility of external impurities entering the ventilation valve 100, reduce the damage to the waterproof ventilation membrane 41, and ensure the gas exchange at both sides of the ventilation valve 100, thereby ensuring the ventilation function of the ventilation valve 100.

Referring to fig. 9, another schematic structure of a protective cover 50 according to an embodiment of the present application is shown.

As shown in fig. 9, the side plate 52 is provided with ventilation holes 53 therethrough so that the side of the adapter 40 facing away from the core cover 21 can communicate with the external environment. Based on the fact that the integrity of the waterproof and breathable film 41 may be damaged by external impurities, it can be understood that the ventilation holes 53 are formed in the side plates 52, so that the ventilation function of the ventilation valve 100 can be guaranteed, the possibility that the external impurities enter the ventilation valve 100 through the ventilation holes 53 can be reduced, the damage of the external impurities to the waterproof and breathable film 41 is further reduced, and the service life of the waterproof and breathable film 41 is prolonged. Further reducing the maintenance costs for the ventilation valve 100 of the present application.

In another embodiment, the ventilation holes 53 may be provided at other places where communication between opposite sides of the ventilation valve 100 is possible. The present application is not particularly limited thereto.

Referring to fig. 10, a schematic diagram of a valve body 10 according to an embodiment of the present application is shown. And with reference to fig. 2.

As shown in fig. 2 and 10, the valve body 10 is provided with a second mounting groove 14, the second mounting groove 14 is located on the surface of the valve body 10 away from the core cover 21, and the second mounting groove 14 surrounds the outer wall of the valve body 10. The ventilation valve 100 of the present application further includes a second sealing ring 70, where the second sealing ring 70 is fixed in the second mounting groove 14 and partially exposes the second mounting groove 14.

When the ventilation valve 100 of the present application is installed in a battery pack, the installation surface of the valve body 10 facing away from the core cover 21 is in contact with an external structure. The second seal ring 70 can seal the mounting surface between the valve body 10 and the external structure (battery pack) to prevent the internal environment from communicating with the external environment via the gap between the valve body 10 and the external structure. Further improving the sealing performance of the ventilation valve 100 of the present application.

It will be appreciated that in another embodiment, the second mounting groove 14 may also be provided on the outer structure. The present application is not particularly limited thereto.

In one embodiment, as shown in fig. 10, a positioning hole 15 is further provided on a mounting surface of the valve body 10 facing away from the core cover 21, and threads are provided in the positioning hole 15, so that when the ventilation valve 100 of the present application is connected to an external structure, the ventilation valve 100 of the present application is fixedly connected to the external structure through the threads in the positioning hole 15.

It should be appreciated that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It is to be understood that the utility model is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims. Those skilled in the art will recognize that the full or partial flow of the embodiments described above can be practiced and equivalent variations of the embodiments of the present utility model are within the scope of the appended claims.

Claims (12)

1. The utility model provides a breather valve, its characterized in that includes valve body, case and adaptor, the valve body is equipped with the hole that runs through, the case pass the hole and expose in the opposite side of valve body, and with valve body elastic connection, the case is equipped with the through-hole that runs through, the adaptor is fixed in the case is kept away from valve body one side, the adaptor with the connection can be dismantled to the case, the adaptor includes waterproof ventilated membrane, waterproof ventilated membrane is used for shielding the through-hole.

2. The air-permeable valve according to claim 1, wherein the adapter further comprises a main body section and a connecting section, the main body section is fixed between the waterproof air-permeable membrane and the connecting section, and the connecting section extends into the through hole and is detachably connected with the inner wall of the through hole.

3. The ventilation valve of claim 2, wherein the adapter is further provided with a communication hole extending through the body section and the connection section, the communication hole including opposing first and second openings, the first opening being located in the body section and the second opening being located in the connection section, the first opening having an area greater than an area of the second opening.

4. The ventilation valve of claim 1, wherein the adapter is annular and surrounds the outer edge of the through hole.

5. The ventilation valve according to any one of claims 1-4, wherein the valve body is provided with at least one air vent located at an outer edge of the inner bore;

The air permeable valve further comprises an elastic piece and a fixing piece, the valve core comprises a core rod and a core cover which are fixedly connected, the core rod penetrates into the inner hole and is exposed out of the other side of the valve body, the fixing piece is fixed at one end, far away from the core cover, of the core rod, the elastic piece is sleeved on the outer edge of the core rod and is propped against the position between the valve body and the fixing piece, the core cover is used for shielding the at least one air guide hole, and the through hole penetrates through the core cover and the core rod.

6. The breather valve of claim 5, wherein the surface of the valve body adjacent to the core cover is convexly provided with an annular side wall, the breather valve further comprising a protective cover secured to the annular side wall to accommodate and protect the core cover and the adapter in cooperation with the annular side wall;

at least one ventilation hole is formed in the protective cover so as to be communicated with two sides of the protective cover.

7. The vent valve of claim 6, wherein a gap is left between the core cover and the annular sidewall, the gap being configured to communicate the vent hole with the vent hole when the core cover opens the vent hole.

8. The breather valve of claim 6, wherein a distance between the waterproof breather membrane and the protective cover in a sliding direction of the core cover is greater than a sliding distance of the core cover relative to the valve body.

9. The ventilation valve according to claim 6, wherein the protective cover comprises a cover plate and a side plate, the side plate is arranged around the outer edge of the cover plate and is connected with the annular side wall, and the ventilation holes penetrate through the side plate and/or the cover plate.

10. The breather valve of claim 5, wherein a first seal ring is disposed between the valve body and the core cover, the first seal ring surrounding an outer edge of the at least one gas-guide hole, the first seal ring being configured to seal an end face in contact between the core cover and the valve body; and/or the number of the groups of groups,

The valve body deviates from one side of core lid is equipped with the second sealing washer, the second sealing washer encircle in the outer wall of valve body, the second sealing washer is used for sealing the installation face between valve body and the external structure.

11. A battery pack, comprising a battery tray and the ventilation valve according to any one of claims 1-10, wherein the battery tray is provided with a ventilation hole, and a valve body of the ventilation valve is embedded in the ventilation hole.

12. A vehicle comprising a vehicle body, and the battery pack according to claim 11, wherein the battery pack is accommodated in the vehicle body.