Valve body of battery pack, battery pack and vehicle

Abstract

The invention discloses a valve body of a battery pack, the battery pack and a vehicle, the valve body of the battery pack comprises a valve body, an exhaust device and a moisture removal device, the valve body is provided with a channel, the first end of the channel is suitable for being communicated with the interior of the battery pack, and the second end of the channel is suitable for being communicated with the outside; the exhaust device and the moisture removal device are arranged in the channel, the exhaust device has an exhaust state, when the internal air pressure of the battery pack is greater than the preset air pressure, the exhaust device is switched to the exhaust state, and air in the battery pack is discharged to the outside through the exhaust device and the second end of the channel; the moisture removal device has a moisture removal state, when the internal humidity of the battery pack is greater than the preset humidity, the moisture removal device is switched to the moisture removal state, and moisture in the battery pack is discharged to the outside through the moisture removal device and the second end of the channel. According to the valve body of the battery pack, the safety risk caused by abnormal air pressure or humidity in the battery pack is reduced, and the safety performance and reliability of the battery pack can be maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of battery protection equipment, and in particular to a valve body of a battery pack, a battery pack and a vehicle. Background Art

[0002] In the prior art, a vent valve is generally provided inside the battery pack to maintain the air pressure balance inside and outside the battery pack. However, when the humidity inside the battery pack is high, the battery pack is prone to short circuit, and the components inside the battery pack are easily corroded in a humid environment, which may cause safety accidents in the battery pack due to abnormal humidity. Therefore, a valve that can both exhaust and dehumidify is needed to ensure that the battery pack is in a dry and less-gassing working environment. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a valve body of a battery pack, which reduces the safety risk caused by abnormal humidity inside the battery pack by arranging a dehumidification device in the channel of the valve body, which is conducive to maintaining the safety performance and reliability of the battery pack.

[0004] Another object of the present invention is to provide a battery pack comprising the valve body of the battery pack.

[0005] Another object of the present invention is to provide a vehicle comprising the above-mentioned battery pack.

[0006] The valve body of a battery pack according to an embodiment of the first aspect of the present invention comprises: a valve body, wherein the valve body has a channel, a first end of the channel is suitable for communicating with the interior of the battery pack, and a second end of the channel is suitable for communicating with the outside; an exhaust device, wherein the exhaust device is arranged in the channel, and the exhaust device has an exhaust state, when the internal air pressure of the battery pack is greater than a preset air pressure, the exhaust device switches to the exhaust state, the interior of the battery pack is communicated with the channel through the exhaust device, and the gas in the battery pack is discharged to the outside through the exhaust device and the second end of the channel; a dehumidification device, wherein the dehumidification device is arranged in the channel, and the dehumidification device has a dehumidification state, when the internal humidity of the battery pack is greater than a preset humidity, the dehumidification device switches to the dehumidification state, the interior of the battery pack is communicated with the channel through the dehumidification device, and the moisture in the battery pack is discharged to the outside through the dehumidification device and the second end of the channel.

[0007] According to the valve body of the battery pack of the first aspect of the present invention, a dehumidification device is arranged in the channel of the valve body, so that the moisture in the battery pack can be discharged in time, thereby maintaining the stability of the internal environment of the battery pack, reducing the safety risks caused by abnormal humidity inside the battery pack, and being beneficial to maintaining the safety performance and reliability of the battery pack.

[0008] According to some embodiments of the present invention, the dehumidification device includes: a dehumidification pipe, a first end of which is suitable for communicating with the interior of the battery pack, and a second end of which is suitable for communicating with the channel; a vaporization component, which is arranged at the second end of the dehumidification pipe; a humidity detector, which is arranged at the first end of the dehumidification pipe and is used to detect the internal humidity of the battery pack; wherein, when the dehumidification device is in the dehumidification state, the moisture in the battery pack flows to the vaporization component through the dehumidification pipe, and the moisture is vaporized by the vaporization component and discharged to the outside from the second end of the channel.

[0009] According to some embodiments of the present invention, the dehumidification device also includes: two first sealing plates, which are respectively arranged at the first end and the second end of the dehumidification duct, and when the internal humidity of the battery pack is greater than the preset humidity, the two first sealing plates open the dehumidification duct, and when the internal humidity of the battery pack is less than or equal to the preset humidity, the two first sealing plates block the dehumidification duct.

[0010] According to some embodiments of the present invention, the exhaust device includes: an exhaust duct, a first end of which is suitable for communicating with the interior of the battery pack, and a second end of which is suitable for communicating with the channel; an air pressure detector, which is arranged at the first end of the exhaust duct and is used to detect the internal air pressure of the battery pack; wherein, when the exhaust device is in the exhaust state, the interior of the battery pack is connected to the channel through the exhaust duct.

[0011] According to some embodiments of the present invention, the exhaust device also includes: two second sealing plates, the two second sealing plates are respectively arranged at the first end and the second end of the exhaust duct, when the internal air pressure of the battery pack is greater than the preset air pressure, the two second sealing plates open the exhaust duct, and when the internal air pressure of the battery pack is less than or equal to the preset air pressure, the two second sealing plates block the exhaust duct.

[0012] According to some embodiments of the present invention, the valve body of the battery pack further includes: a valve cover, which is disposed at the second end of the channel; and a waterproof breathable membrane, which is disposed between the valve cover and the second end of the channel.

[0013] According to some embodiments of the present invention, the valve body includes a first body section and a second body section connected to each other, the outer diameter of the first body section is larger than the outer diameter of the second body section, the valve cover and the waterproof breathable membrane are arranged on the first body section, and the exhaust device and the dehumidification device are arranged in the second body section; wherein a slot is formed on one of the valve cover and the first body section, and a buckle is provided on the other of the valve cover and the first body section, and the buckle fits in the slot.

[0014] According to some embodiments of the present invention, a groove is provided on one side of the first body segment adjacent to the second body segment, and a sealing member is provided in the groove.

[0015] A battery pack according to an embodiment of a second aspect of the present invention comprises the valve body of the battery pack according to an embodiment of the first aspect of the present invention.

[0016] A vehicle according to an embodiment of a third aspect of the present invention comprises a battery pack according to an embodiment of the second aspect of the present invention.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of a valve body of a battery pack according to an embodiment of the present invention; Figure 2 is a cross-sectional view of a valve body of a battery pack according to an embodiment of the present invention; Figure 3 is a partial view of a valve body of a battery pack according to an embodiment of the present invention; Figure 4 FIG. 4 is a bottom view of a valve body of a battery pack according to an embodiment of the present invention.

[0020] Description of reference numerals: 100. Valve body of battery pack; 1. Valve body; 11. Channel; 12. First body section; 121. Buckle; 122. Groove; 13. Second body section; 2. Exhaust device; 21. Exhaust pipe; 211. Through hole; 22. Air pressure detector; 23. Second sealing plate; 3. Dehumidification device; 31. Dehumidification pipe; 32. Gasification component; 33. Humidity detector; 34. First sealing plate; 4. Valve cover; 41. Slot; 5. Waterproof and breathable membrane; 6. Sealing component. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 4 A valve body 100 of a battery pack according to an embodiment of the first aspect of the present invention is described.

[0022] like Figure 1 and Figure 2 As shown, the valve body 100 of the battery pack according to the first embodiment of the present invention includes: a valve body 1, an exhaust device 2 and a moisture removal device 3.

[0023] Specifically, the valve body 1 has a channel 11, the first end of the channel 11 is suitable for communicating with the interior of the battery pack, and the second end of the channel 11 is suitable for communicating with the outside. The exhaust device 2 is arranged in the channel 11, and the exhaust device 2 has an exhaust state. When the internal air pressure of the battery pack is greater than the preset air pressure, the exhaust device 2 switches to the exhaust state, and the interior of the battery pack is connected to the channel 11 through the exhaust device 2, and the gas in the battery pack is discharged to the outside through the exhaust device 2 and the second end of the channel 11. The dehumidification device 3 is arranged in the channel 11, and the dehumidification device 3 has a dehumidification state. When the internal humidity of the battery pack is greater than the preset humidity, the dehumidification device 3 switches to the dehumidification state, and the interior of the battery pack is connected to the channel 11 through the dehumidification device 3, and the moisture in the battery pack is discharged to the outside through the dehumidification device 3 and the second end of the channel 11.

[0024] For example, in Figure 2 In the example, the valve body 1 is generally a columnar structure, and the channel 11 is along the axial direction of the valve body 1 (for example, Figure 2 The channel 11 is opened in the up and down directions, the cross-section of the channel 11 is circular, and the exhaust device 2 and the moisture removal device 3 can be arranged near the first end of the channel 11 to more accurately detect the air pressure and humidity inside the battery pack.

[0025] When the internal air pressure of the battery pack is too high, the exhaust device 2 can discharge the internal gas in time to prevent the battery pack from being damaged due to excessive pressure, thereby ensuring the safety of the battery pack. When the humidity inside the battery pack is high, the dehumidification device 3 can quickly discharge the moisture to prevent moisture from damaging the internal components of the battery pack and extend the service life of the battery pack. By discharging moisture in time, the stability of the internal environment of the battery pack is maintained, reducing the safety risks caused by abnormal humidity inside the battery pack, which is conducive to maintaining the safety performance and reliability of the battery pack.

[0026] According to the valve body 100 of the battery pack in an embodiment of the present invention, by arranging the exhaust device 2 and the dehumidification device 3 in the channel 11 of the valve body 1, the gas and moisture in the battery pack can be discharged in time, thereby maintaining the stability of the internal environment of the battery pack, reducing the safety risks caused by abnormal air pressure or humidity inside the battery pack, and being beneficial to maintaining the safety performance and reliability of the battery pack.

[0027] According to some embodiments of the present invention, Figure 2 As shown, the dehumidification device 3 includes: a dehumidification pipeline 31, a gasification component 32 and a humidity detector 33.

[0028] Specifically, the first end of the dehumidification duct 31 is adapted to communicate with the interior of the battery pack, and the second end of the dehumidification duct 31 is adapted to communicate with the channel 11. The vaporizer 32 is disposed at the second end of the dehumidification duct 31; the humidity detector 33 is disposed at the first end of the dehumidification duct 31, and is used to detect the internal humidity of the battery pack.

[0029] When the dehumidification device 3 is in the dehumidification state, the moisture in the battery pack flows to the vaporization component 32 through the dehumidification pipe 31 , and the moisture is vaporized by the vaporization component 32 and then discharged to the outside from the second end of the channel 11 .

[0030] For example, in Figure 2 In the example, the humidity detector 33 is arranged close to the interior of the battery pack so as to more accurately detect the humidity changes inside the battery pack and ensure that the dehumidification device 3 can respond to the humidity changes inside the battery pack in a timely manner. When the humidity detector 33 detects that the internal humidity of the battery pack is greater than the preset humidity, the dehumidification device 3 switches to the dehumidification state, the interior of the battery pack is connected to the dehumidification pipe 31, and the moisture in the battery pack flows to the vaporization component 32 through the dehumidification pipe 31. The vaporization component 32 can quickly vaporize the moisture, making it easier to discharge it to the outside through the channel 11, thereby improving the dehumidification efficiency. In addition, the dehumidification pipe 31 is directly connected to the interior of the battery pack, and can discharge moisture in a targeted manner, avoiding the accumulation of moisture in the battery pack, thereby maintaining a dry internal environment of the battery pack and extending the service life of the internal components of the battery pack. It should be noted that the gasification component 32 can be a device that converts liquid into gas through pressure difference, temperature, electrolysis, etc., such as a heater, a radiator or an electrolytic box. Those skilled in the art can choose according to actual needs, and the embodiments of the present application are not specifically limited here.

[0031] Furthermore, if Figure 2-Figure 4 As shown, the dehumidification device 3 also includes two first sealing plates 34, and the two first sealing plates 34 are respectively arranged at the first end and the second end of the dehumidification pipe 31. When the internal humidity of the battery pack is greater than the preset humidity, the two first sealing plates 34 open the dehumidification pipe 31. When the internal humidity of the battery pack is less than or equal to the preset humidity, the two first sealing plates 34 block the dehumidification pipe 31.

[0032] In specific implementation, Figure 2 As shown, the first end and the second end of the moisture removal pipe 31 are both provided with a through hole 211, and the first sealing plate 34 is provided at the through hole 211. The first sealing plate 34 is generally a water drop-shaped plate structure (such as Figure 4 As shown in the figure), the sharp corner of the first sealing plate 34 can be connected to the humidity detector 33, and the larger area portion of the first sealing plate 34 is used to block the moisture removal channel 11.

[0033] With such a configuration, the two first sealing plates 34 can flexibly open and close the dehumidification duct 31 according to the humidity conditions in the battery pack, thereby achieving precise control of the dehumidification process. When the internal humidity of the battery pack exceeds the preset humidity, the two first sealing plates 34 open the dehumidification duct 31 in time to achieve automatic dehumidification; and when the humidity of the battery pack drops below the preset value, the two first sealing plates 34 can block the dehumidification duct 31 in time to maintain the humidity balance inside the battery pack and better protect the performance and life of the battery. In some optional embodiments, the exhaust device 2 includes: an exhaust pipe 21 and an air pressure detector 22 .

[0034] Specifically, the first end of the exhaust duct 21 is adapted to communicate with the interior of the battery pack, and the second end of the exhaust duct 21 is adapted to communicate with the channel 11. The air pressure detector 22 is provided at the first end of the exhaust duct 21 to detect the internal air pressure of the battery pack.

[0035] When the exhaust device 2 is in the exhaust state, the interior of the battery pack is connected to the channel 11 through the exhaust pipe 21 .

[0036] For example, in Figure 2 In the example, the air pressure detector 22 is arranged close to the interior of the battery pack so as to more accurately detect the air pressure changes inside the battery pack and ensure that the exhaust device 2 can respond to the air pressure changes inside the battery pack in a timely manner. When the air pressure detector 22 detects that the internal air pressure of the battery pack is greater than the preset air pressure, the exhaust device 2 switches to the exhaust state, the interior of the battery pack is connected to the exhaust duct 21, and the gas in the battery pack is discharged to the outside through the exhaust duct 21 and the channel 11, thereby improving the exhaust efficiency. In addition, the exhaust duct 21 is directly connected to the interior of the battery pack, and can discharge the gas in a targeted manner, thereby maintaining the air pressure balance inside and outside the battery pack, and ensuring the working reliability and safety of the battery pack.

[0037] It should be noted that the exhaust passage 11 may be an airbag, and those skilled in the art may select one according to actual needs, and the embodiment of the present application does not make any specific limitation thereto.

[0038] According to some embodiments of the present invention, Figure 2-Figure 4 As shown, the exhaust device 2 also includes two second sealing plates 23, and the two second sealing plates 23 are respectively arranged at the first end and the second end of the exhaust duct 21. When the internal air pressure of the battery pack is greater than the preset air pressure, the two second sealing plates 23 open the exhaust duct 21. When the internal air pressure of the battery pack is less than or equal to the preset air pressure, the two second sealing plates 23 block the exhaust duct 21.

[0039] In a specific implementation, the first end and the second end of the exhaust pipe 21 are both provided with a through hole 211, and the second sealing plate 23 is provided at the through hole 211. The second sealing plate 23 is generally a water drop-shaped plate structure (such as Figure 4As shown in the figure), the sharp corner of the second sealing plate 23 can be connected to the air pressure detector 22, and the larger area portion of the second sealing plate 23 is used to block the exhaust channel 11.

[0040] With such a configuration, the two second sealing plates 23 can flexibly open and close the exhaust duct 21 according to the air pressure in the battery pack, thereby achieving precise control of the exhaust process. When the internal air pressure of the battery pack exceeds the preset air pressure value (0.6kPa±0.3kPa) or the external air pressure of the battery pack exceeds the preset air pressure value (1kPa~4kPa), the two second sealing plates 23 open the exhaust duct 21 in time to achieve automatic air intake and exhaust, ensuring that the internal and external air pressures of the battery pack are balanced, thereby ensuring the working reliability of the battery pack. When the internal and external air pressures of the battery pack are stable, the two second sealing plates 23 block the exhaust duct 21, ensuring the sealing of the exhaust device 2 and preventing gas leakage in the battery pack. According to some specific embodiments of the present invention, Figure 2 As shown, the valve body 100 of the battery pack further includes: a valve cover 4 and a waterproof breathable membrane 5 .

[0041] Specifically, the valve cover 4 is arranged at the second end of the channel 11, and the waterproof breathable membrane 5 is arranged between the valve cover 4 and the second end of the channel 11. The air permeability of the waterproof breathable membrane 5 is ≥60ml / min@7kPa (when the pressure reaches 7kPa, the air permeability of the waterproof breathable membrane 5 can reach or exceed 60ml / min). The valve cover 4 can effectively close the second end of the channel 11 to prevent external impurities from entering the battery pack. The waterproof breathable membrane 5 plays a good waterproof role, preventing external moisture from penetrating into the battery pack, while ensuring the normal circulation of gas and maintaining the air pressure balance between the battery pack and the outside world. This arrangement improves the protectiveness of the valve body 100 of the battery pack and enhances the reliability of the valve body 100 of the battery pack under various environmental conditions. Moreover, the arrangement of the valve cover 4 and the waterproof breathable membrane 5 can protect the components inside the battery pack and extend the service life of the battery pack.

[0042] Furthermore, the valve body 1 includes a first body section 12 and a second body section 13 connected to each other, the outer diameter of the first body section 12 is larger than the outer diameter of the second body section 13, the valve cover 4 and the waterproof breathable membrane 5 are arranged on the first body section 12, and the exhaust device 2 and the dehumidification device 3 are arranged in the second body section 13.

[0043] A slot 41 is formed on one of the valve cover 4 and the first body section 12 , and a buckle 121 is provided on the other of the valve cover 4 and the first body section 12 . The buckle 121 fits in the slot 41 .

[0044] For example, in Figure 2In the example, the slot 41 is provided on the valve cover 4, the buckle 121 is provided on the first body section 12, and the slot 41 is substantially an annular groove. The connection method between the first body section 12 and the second body section 13 makes the valve body 1 as a whole present a T-shaped structure, the second body section 13 is provided close to the interior of the battery pack, and the first body section 12 is located at the end of the second body section 13 away from the interior of the battery pack. In addition, the valve cover 4 and the waterproof breathable membrane 5 are provided on the first body section 12, and the exhaust device 2 and the dehumidification device 3 are provided on the second body section 13, so that the structure of the valve body 1 is more compact. In addition, the matching design of the buckle 121 and the slot 41 makes the installation and disassembly of the valve cover 4 easier, and ensures that the valve cover 4 and the valve body 1 can be tightly combined, thereby enhancing the overall stability and sealing of the valve body 100 of the battery pack. According to some embodiments of the present invention, a groove 123 is provided on one side of the first body segment 12 adjacent to the second body segment 13 , and a sealing member 6 is provided in the groove 123 .

[0045] The side of the first body section 12 adjacent to the second body section 13 is prevented from being connected to the battery pack. By providing a seal 6 in the groove 123, the sealing performance of the connection between the valve body 1 and the battery pack is improved, and the gas and liquid in the battery pack are prevented from leaking, further improving the safety and stability of the battery pack. Moreover, the provision of the seal 6 can reduce the impact of external factors on the inside of the battery pack, thereby extending the service life of the battery pack. It should be noted that the sealing member 6 may be a rubber sealing ring or the like, and those skilled in the art may select the sealing member according to actual needs, and the embodiment of the present application does not specifically limit the selection thereof.

[0046] A battery pack (not shown) according to an embodiment of a second aspect of the present invention comprises the valve body 100 of the battery pack according to an embodiment of the first aspect of the present invention.

[0047] According to the battery pack of the embodiment of the present invention, by adopting the valve body 100 of the battery pack, the air pressure and humidity inside and outside the battery pack can reach a balanced state, thereby reducing the safety risks caused by abnormal air pressure or humidity inside the battery pack, which is beneficial to maintaining the safety performance and reliability of the battery pack.

[0048] Other structures and operations of the battery pack according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0049] A vehicle according to an embodiment of a third aspect of the present invention (not shown) comprises a battery pack according to an embodiment of the first aspect of the present invention.

[0050] The vehicle according to the embodiment of the present invention improves the safety and working reliability of the power system by adopting the above-mentioned battery pack, thereby ensuring the normal operation of the vehicle.

[0051] Other components and operations of the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A valve body of a battery pack, characterized in that: include: A valve body, wherein the valve body has a channel, a first end of the channel is adapted to communicate with the interior of the battery pack, and a second end of the channel is adapted to communicate with the outside; an exhaust device, the exhaust device being arranged in the channel, the exhaust device having an exhaust state, when the internal air pressure of the battery pack is greater than a preset air pressure, the exhaust device switches to the exhaust state, the interior of the battery pack is connected to the channel through the exhaust device, and the gas in the battery pack is discharged to the outside through the exhaust device and the second end of the channel; A dehumidification device is arranged in the channel, and the dehumidification device has a dehumidification state. When the internal humidity of the battery pack is greater than a preset humidity, the dehumidification device switches to the dehumidification state, and the interior of the battery pack is connected to the channel through the dehumidification device. The moisture in the battery pack is discharged to the outside through the dehumidification device and the second end of the channel.

2. The valve body of the battery pack according to claim 1, characterized in that: The dehumidification device comprises: a moisture discharge duct, wherein a first end of the moisture discharge duct is adapted to communicate with the interior of the battery pack, and a second end of the moisture discharge duct is adapted to communicate with the channel; A gasification component, the gasification component is arranged at the second end of the moisture removal pipeline; a humidity detector, the humidity detector being disposed at a first end of the moisture discharge duct and being used to detect the internal humidity of the battery pack; Wherein, when the dehumidification device is in the dehumidification state, the moisture in the battery pack flows to the gasification component through the dehumidification pipe, and the moisture is gasified by the gasification component and then discharged to the outside from the second end of the channel.

3. The valve body of the battery pack according to claim 2, characterized in that: The dehumidification device also includes: Two first sealing plates are respectively arranged at the first end and the second end of the dehumidification duct. When the internal humidity of the battery pack is greater than the preset humidity, the two first sealing plates open the dehumidification duct. When the internal humidity of the battery pack is less than or equal to the preset humidity, the two first sealing plates block the dehumidification duct.

4. The valve body of the battery pack according to claim 2, characterized in that: The exhaust device comprises: an exhaust duct, wherein a first end of the exhaust duct is adapted to communicate with the interior of the battery pack, and a second end of the exhaust duct is adapted to communicate with the channel; an air pressure detector, the air pressure detector being disposed at a first end of the exhaust duct and being used to detect the internal air pressure of the battery pack; Wherein, when the exhaust device is in the exhaust state, the interior of the battery pack is connected to the channel through the exhaust pipe.

5. The valve body of the battery pack according to claim 4, characterized in that: The exhaust device also includes: Two second sealing plates are respectively arranged at the first end and the second end of the exhaust duct. When the internal air pressure of the battery pack is greater than the preset air pressure, the two second sealing plates open the exhaust duct. When the internal air pressure of the battery pack is less than or equal to the preset air pressure, the two second sealing plates block the exhaust duct.

6. The valve body of the battery pack according to any one of claims 2 to 5, characterized in that: Also includes: a valve cover, the valve cover being disposed at the second end of the passage; A waterproof and breathable membrane is provided between the valve cover and the second end of the channel.

7. The valve body of the battery pack according to claim 6, characterized in that: The valve body comprises a first body section and a second body section connected to each other, the outer diameter of the first body section is larger than the outer diameter of the second body section, the valve cover and the waterproof breathable membrane are arranged on the first body section, and the exhaust device and the moisture removal device are arranged in the second body section; A slot is formed on one of the valve cover and the first body section, and a buckle is provided on the other of the valve cover and the first body section, and the buckle fits in the slot.

8. The valve body of the battery pack according to claim 7, characterized in that: A groove is provided on one side of the first body section adjacent to the second body section, and a sealing member is provided in the groove.

9. A battery pack, characterized in that: A valve body comprising a battery pack according to any one of claims 1-8.

10. A vehicle, characterized in that: Comprising the battery pack according to claim 9.

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