Valve, battery pack and vehicle

Abstract

The utility model discloses a valve, a battery pack and a vehicle, and relates to the field of batteries, the valve comprises a valve body, the valve body is provided with a gap, and the gap is used for being communicated with a pressure relief hole of the battery pack to exhaust gas in the battery pack; the shell is provided with a groove, the shell is used for being connected with the outer wall of the battery pack to define a cavity, the groove is at least part of the cavity, and an opening is formed in the shell; the protection parts are arranged in the groove, a ventilation channel is formed by the protection parts and the inner wall of the shell, and the protection parts are arranged between the opening and the valve body at intervals so as to reduce the amount of objects entering the groove from the outside of the opening and impacting the valve body. According to the scheme, the valve has the flow guide and pressure relief effects, meanwhile, the impact of external objects on the valve can be weakened, and then it is guaranteed that the battery pack works normally and safely in the vehicle running process.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a valve, a battery pack and a vehicle. Background Art

[0002] Many battery packs now have one or more explosion-proof valves to balance the internal and external pressures of the battery pack, and can also be used for directional and rapid pressure relief when thermal runaway occurs in the battery pack. However, due to the structural design of the explosion-proof valve and vehicle restrictions, some explosion-proof valves are now set at the front of the vehicle, that is, in the direction of the vehicle's travel. In this way, when the vehicle is moving at a high speed, muddy water and small stones will impact the explosion-proof valve, causing certain damage to the explosion-proof valve. Therefore, it is necessary to design a valve that can not only play a role in diversion and pressure relief, but also weaken the impact of external objects on the valve, thereby ensuring that the battery pack works normally and safely during the vehicle's driving. Utility Model Content

[0003] The present application proposes a valve, a battery pack and a vehicle. Compared with the prior art, the valve can not only guide the flow and release the pressure of the battery pack, but also weaken the impact of muddy water and small stones on the valve during the driving of the vehicle, thereby ensuring that the battery pack works normally and safely during the driving of the vehicle.

[0004] In the first aspect, the present application proposes a valve, comprising a valve body, provided with a gap, wherein the gap is used to communicate with the pressure relief hole of the battery pack to discharge the gas in the battery pack; a shell, having a groove, wherein the shell is used to connect with the outer wall of the battery pack to enclose and form a chamber, wherein the groove is at least a part of the chamber, and an opening is provided on the shell; a protective member, which is arranged in the groove and forms a ventilation channel with the inner wall of the shell, and the protective member is arranged at intervals between the opening and the valve body to reduce the amount of objects entering the groove from outside the opening and impacting the valve body.

[0005] A valve body, a shell and a protective member are arranged in the valve, wherein the valve body is provided with a gap, the gap is used to communicate with the pressure relief hole of the battery pack to discharge the gas in the battery pack, the shell has a groove, the shell is used to connect with the outer wall of the battery pack to enclose and form a chamber, the groove is at least a part of the chamber, an opening is arranged on the shell, the protective member is arranged in the groove and forms a ventilation channel with the inner wall of the shell, the protective member is arranged between the opening and the valve body at intervals to reduce the amount of objects entering the groove from outside the opening and impacting the valve body, so that the valve can not only play the role of diverting and relieving pressure but also weaken the impact of external objects on the valve.

[0006] In an implementation of the first aspect, the protective member includes a first baffle, the first baffle is at least partially disposed on the inner side of the opening, the first baffle divides the groove into a receiving portion and a first ventilation channel, the valve body is located in the receiving portion, a first ventilation channel is formed between the first baffle and the side wall of the groove, and the opening, the first ventilation channel and the receiving portion are sequentially connected. By setting the first baffle, wherein the first baffle is at least partially disposed on the inner side of the opening, the first baffle divides the groove into a receiving portion and a first ventilation channel, the valve body is located in the receiving portion, a first ventilation channel is formed between the first baffle and the side wall of the groove, and the opening, the first ventilation channel and the receiving portion are sequentially connected, so that the first baffle can weaken the impact of external objects on the valve and can also form the first ventilation channel with the valve housing, thereby facilitating the gas in the valve to flow out of the valve.

[0007] In an implementation of the first aspect, there are two first ventilation channels, and the two first ventilation channels are located on opposite sides of the first baffle. By providing two first ventilation channels, wherein the two first ventilation channels are located on opposite sides of the first baffle, the gas in the valve can be more effectively guided out of the valve.

[0008] In an implementation of the first aspect, the protective member includes a second baffle, the second baffle is sealed and connected to the first baffle or is an integral structure, a gap is formed between the first baffle and the bottom wall of the groove, a second ventilation channel is formed between the second baffle and the bottom wall of the groove, the side of the second baffle away from the bottom wall of the groove is the accommodating portion, the gap is located at one end of the second ventilation channel facing the opening, and the opening, the second ventilation channel and the accommodating portion are connected in sequence. By setting the second baffle, wherein the second baffle is sealed and connected to the first baffle or is an integral structure, a gap is formed between the first baffle and the bottom wall of the groove, a second ventilation channel is formed between the second baffle and the bottom wall of the groove, the side of the second baffle away from the bottom wall of the groove is the accommodating portion, the gap is located at one end of the second ventilation channel facing the opening, the opening, the second ventilation channel and the accommodating portion are connected in sequence, so that the second baffle can weaken the impact of external objects on the valve and can also form a second ventilation channel with the housing of the valve, thereby facilitating the gas in the valve to flow out of the valve.

[0009] In an implementation of the first aspect, part of the first baffle passes through the opening and is disposed outside the chamber. By allowing part of the first baffle to pass through the opening and be disposed outside the chamber, the first baffle can more effectively reduce the amount of objects impacting the valve body.

[0010] In an implementation of the first aspect, the valve further comprises a connector, wherein the number of the connectors is at least two, the connectors are located in the channel, the connectors are used to connect the protective member and the shell, and any two adjacent connectors are arranged at intervals. By arranging a connector on the valve, wherein the number of the connectors is at least two, the connectors are located in the channel, the connectors are used to connect the protective member and the shell, and any two adjacent connectors are arranged at intervals, the protective member can avoid weakening the gas diversion effect in the chamber at the connection when it is connected to the shell, which is ultimately beneficial to divert the gas in the valve to the outside of the valve.

[0011] In an implementation of the first aspect, the side wall of the groove is arc-shaped, and the arc-shaped first ventilation channel is formed between the side wall and the first baffle. By making the side wall of the groove arc-shaped, wherein the arc-shaped first ventilation channel is formed between the side wall and the first baffle, it is beneficial for the first ventilation channel to guide the gas in the valve to the outside of the valve.

[0012] In the second aspect, the present application proposes a battery pack, comprising a shell wall, a mounting portion, and the valve described in the first aspect, wherein the shell wall, the mounting portion, and the valve are connected in sequence, the mounting portion has a pressure relief hole, the pressure relief hole is connected to the gap of the valve body, the gas in the battery pack passes through the pressure relief hole and the gap and enters the chamber, and is discharged to the outside of the chamber through the opening. By making the battery pack include a shell wall, a mounting portion, and the valve described in the first aspect, wherein the shell wall, the mounting portion, and the valve are connected in sequence, the mounting portion has a pressure relief hole, the pressure relief hole is connected to the gap of the valve body, the gas in the battery pack passes through the pressure relief hole and the gap and enters the chamber, and is discharged to the outside of the chamber through the opening, the gas that needs to be discharged in the battery pack can quickly pass through the pressure relief hole, the gap, the channel, and the opening in sequence and can finally be discharged to the outside of the chamber of the valve.

[0013] In a third aspect, the present application proposes a vehicle, comprising a chassis and the battery pack described in the second aspect, wherein the battery pack is connected to the chassis. By making the vehicle include the chassis and the battery pack described in the second aspect, wherein the battery pack is connected to the chassis, the vehicle can safely and continuously receive power provided by the battery pack.

[0014] In an implementation of the third aspect, the vehicle further comprises a cockpit, and the opening faces away from the cockpit. By making the opening face away from the cockpit, the high-temperature gas in the battery pack can be discharged to the bottom of the vehicle, thereby preventing the high-temperature gas from harming the driver in the cockpit or the passengers in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of a valve according to an embodiment of the present application;

[0016] Figure 2 is an exploded schematic diagram of a valve according to an embodiment of the present application;

[0017] Figure 3 is a schematic diagram of a valve body according to an embodiment of the present application;

[0018] Figure 4 is a bottom view of the valve of the embodiment of the present application;

[0019] Figure 5 yes Figure 1 AA section view of the valve in;

[0020] Figure 6 yes Figure 1 BB section view of the valve in;

[0021] Figure 7 yes Figure 1 CC section view of the valve in;

[0022] Figure 8 From another perspective Figure 1 CC section view of the valve in;

[0023] Fig. 9 yes Figure 1 DD section view of the valve in;

[0024] Fig.10 is a schematic diagram of the coordination structure of a battery pack and a valve according to an embodiment of the present application;

[0025] Fig.11 is an exploded view of the matching structure of the mounting portion and the valve of the embodiment of the present application;

[0026] Fig.12 It is a schematic diagram of the coordination structure of the battery pack, valve and vehicle according to an embodiment of the present application.

[0027] Reference numerals

[0028] 1-valve; 2-housing; 21-groove; 211-groove side wall; 212-groove bottom wall; 22-opening; 23-first through hole;

[0029] 3-protective member; 31-first baffle; 311-first end of first baffle; 312-second end of first baffle; 32-second baffle;

[0030] 4-valve body; 41-slit; 42-second through hole; 5-chamber; 51-accommodation portion;

[0031] 6-ventilation channel; 61-first ventilation channel; 62-second ventilation channel; 63-gap; 7-connector; 8-installation portion; 81-pressure relief hole; 82-nut; 83-fastener; 9-bolt; 20-battery pack; 201-shell wall; 30-vehicle; 301-chassis; 302-cockpit. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", "top", "bottom", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, 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 embodiments of the present application.

[0033] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0034] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0035] Nowadays, vehicles widely use battery packs as one of the power sources. Battery packs are high-voltage components, so they have high insulation requirements. The charging and discharging of the battery pack or changes in the temperature and pressure of the battery pack's environment will cause inconsistent pressure inside and outside the battery pack. If the battery pack is completely sealed, it may cause excessive pressure inside the battery pack, causing the sealing cover of the battery pack to rupture, and ultimately affecting the sealing performance of the entire battery pack. Therefore, many battery packs now have one or more explosion-proof valves to balance the internal and external pressures of the battery pack. The explosion-proof valve can also be used for directional and rapid pressure relief when the battery pack has thermal runaway. However, due to the design of the structure of the explosion-proof valve and vehicle restrictions, some explosion-proof valves are now set at the front of the vehicle, that is, the air release port of the explosion-proof valve faces the direction of travel of the vehicle. Therefore, when the vehicle speed is very fast, muddy water and small stones will impact the explosion-proof valve, causing certain damage to the explosion-proof valve, which is not conducive to the battery pack to safely and continuously power the vehicle, and will ultimately affect the safe and long-term driving of the vehicle.

[0036] In order to solve the above problems, the present application provides a valve. Figure 1is a schematic diagram of a valve 1 according to an embodiment of the present application, Figure 2 is an exploded schematic diagram of the valve 1 of the embodiment of the present application, Figure 3 is a schematic diagram of a valve body 4 of an embodiment of the present application, Figure 4 It is a bottom view of the valve 1 according to the embodiment of the present application.

[0037] Combination Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the valve 1 may include a valve body 4, the valve body 4 may be provided with a slit 41, the slit 41 may be used to communicate with the pressure relief hole of the battery pack to discharge the gas in the battery pack; the valve 1 may include a shell 2, the shell 2 may have a groove 21, the shell 2 may be used to connect with the outer wall of the battery pack to enclose a chamber 5, the groove 21 may be at least a part of the chamber 5, and the shell 2 may be provided with an opening 22. The valve 1 may include a protective member 3, the protective member 3 may be arranged in the groove 21 and form a ventilation channel 6 with the inner wall of the shell 2, and the protective member 3 may be arranged between the opening 22 and the valve body 4 to reduce the amount of objects entering the groove 21 from the outside of the opening 22 and impacting the valve body 4.

[0038] In the above scheme, the pressure relief control of the battery pack can be connected to the gap 41 and the gas in the battery pack can be discharged through the gap 41. The discharged gas can first enter the chamber 5 and can flow from the ventilation channel 6 formed by the protective member 3 and the inner wall of the shell 2 to the opening 22. Finally, the gas can flow to the outside of the chamber 5, which completes the diversion process. Among them, the protective member 3 can be arranged at intervals near the opening 22 and can span between the opening 22 and the chamber 5, so that the protective member 3 can block objects such as muddy water or small stones that enter the chamber 5 through the opening 22, and at the same time, the protective member 3 can play a protective role without hindering the gas in the chamber 5 from being discharged outside the chamber 5.

[0039] In a possible implementation, the flow path of the gas may be as follows. Figure 5 yes Figure 1 AA section view of valve 1 in FIG. Figure 6 yes Figure 1 BB section view of valve 1 in FIG. Figure 5 , Figure 6 , Figure 2 and Figure 4As shown, the protective member 3 may include a first baffle 31, which may be at least partially disposed on the inner side of the opening 22, and the first baffle 31 may separate the groove 21 into an accommodating portion 51 and a first ventilation channel 61, and the valve body 4 may be located in the accommodating portion 51. The groove 21 may include a groove sidewall 211, and a first ventilation channel 61 may be formed between the first baffle 31 and the groove sidewall 211, and the opening 22, the first ventilation channel 61 and the accommodating portion 51 may be connected in sequence.

[0040] In a possible implementation, there may be two first ventilation channels 61 , and the two first ventilation channels 61 may be located on two opposite sides of the first baffle 31 .

[0041] In a possible implementation, the protective member 3 may include a second baffle plate 32 , and the second baffle plate 32 may be sealed and connected to the first baffle plate 31 or may be an integrated structure. Figure 7 yes Figure 1 CC section view of valve 1 in the figure, combined with Figure 7 and Figure 6 As shown, the groove 21 may include a groove bottom wall 212, a gap 63 may be formed between the first baffle plate 31 and the groove bottom wall 212, and a second ventilation channel 62 may be formed between the second baffle plate 32 and the groove bottom wall 212. The side of the second baffle plate 32 away from the groove bottom wall 212 may be a receiving portion 51, the gap 63 may be located at one end of the second ventilation channel 62 facing the opening 22, and the opening 22, the second ventilation channel 62 and the receiving portion 51 may be connected in sequence.

[0042] In a possible implementation, a portion of the first baffle 31 may pass through the opening 22 and may be disposed outside the chamber 5 .

[0043] In a possible implementation, the valve 1 may further include a connecting piece 7. Figure 6 and Figure 7As shown, the number of the connectors 7 can be at least two, the connector 7 can be located in the ventilation channel 6, the connector 7 can be used to connect the protective member 3 and the shell 2, and any two adjacent connectors 7 can be arranged at intervals. Among them, the two connectors 7 can be located at opposite ends of the first baffle 31, the first end 311 of the first baffle and the second end 312 of the first baffle. A first ventilation channel 61 is formed between the first end 311 of the first baffle and the side wall 211 of the groove, and another first ventilation channel 61 can be formed between the second end 312 of the first baffle and the side wall 211 of the groove. In addition, multiple connectors 7 can be arranged at intervals between the second baffle 32 and the bottom wall 212 of the groove, that is, multiple connectors 7 can be located in the second ventilation channel 62, and the multiple connectors 7 can connect the second baffle 32 and the bottom wall 212 of the groove. There can be a gap between any two adjacent connectors 7, and the gap can facilitate the gas in the chamber 5 to be discharged from the chamber 5 through the channel 6 and the opening 22.

[0044] In a possible implementation, the groove sidewall 211 may be arc-shaped, and an arc-shaped first ventilation channel 61 may be formed between the groove sidewall 211 and the first baffle 31. Part of the first baffle 31 that forms the first ventilation channel 61 with the groove sidewall 211 may also be arc-shaped, and the arc-shaped first ventilation channel 61 may enhance the flow guiding effect, that is, the gas of the battery pack that is discharged into the chamber 5 through the slit 41 on the valve body 4 may be quickly discharged to the outside of the chamber 5.

[0045] In summary, see Figure 2 The valve 1 may include a shell 2 , a protective member 3 , and a valve body 4 .

[0046] Combination Figure 2 and Figure 4 As shown, the housing 2 may have a groove 21 and an opening 22. The housing 2 may protect the valve body 4. The housing 2 may be connected to the outer wall of the battery pack to enclose a chamber 5.

[0047] The groove 21 may be at least part of the chamber 5. The groove 21 may include a groove sidewall 211 and a groove bottom wall 212. The groove sidewall 211 may be arc-shaped. The side of the groove bottom wall 212 facing the valve body 4 may be part of the chamber 5.

[0048] See also Figure 6 The protective member 3 can separate the chamber 5 into a first chamber and a second chamber, and the valve body 4 can be located in the second chamber. The opening 22 can be located on the housing 2 that forms the first chamber with the protective member 3, that is, the opening 22 can be located on the groove side wall 211. The protective member 3 can include a first baffle 31 and a second baffle 32.

[0049] The first baffle 31 may be spaced apart from the opening 22, and the first direction may be between one end of the second baffle 32 connected to the first baffle 31 and the other end of the second baffle 32 away from the first baffle 31, and the projection of the first baffle 31 along the first direction may partially overlap with the shell 2 at the edge of the opening 22. The direction that does not intersect the first baffle 31 and the second baffle 32 may be the second direction, and the opposite ends of the first baffle 31 along the second direction are the first baffle first end 311 and the first baffle second end 312, respectively, and the projection of the first baffle first end 311 along the first direction may partially overlap with the shell 2 at the edge of the opening 22, and the projection of the first baffle second end 312 along the first direction may partially overlap with the shell 2 at the edge of the opening 22. The first baffle first end 311 and the first baffle second end 312 may form a first ventilation channel 61 with the groove sidewall 211. The first ventilation channel 61 may be a part of the ventilation channel 6.

[0050] Figure 8 From another perspective Figure 1 CC section view of valve 1 in FIG. Figure 8 and Figure 7 As shown, the second baffle plate 32 can be spaced apart from the groove bottom wall 212, and a second ventilation channel 62 can be formed between the second baffle plate 32 and the groove bottom wall 212. The side of the second baffle plate 32 facing away from the groove bottom wall 212 can be a part of the accommodating portion 51, and the side can face the valve body 4.

[0051] Fig. 9 yes Figure 1 DD section view of valve 1 in FIG. Fig. 9 , Figure 6 and Figure 7 As shown, part of the connecting member 7 may be protruded from the groove side wall 211 and may connect the first baffle 31 with the groove side wall 211. Specifically, the connecting member 7 may be disposed in the first ventilation channel 61 and may respectively connect the first baffle first end 311 and the first baffle second end 312 to the groove side wall 211. Another part of the connecting member 7 may be protruded from the groove bottom wall 212 and may connect the second baffle 32 with the groove bottom wall 212. The connecting member 7 may be disposed in the second ventilation channel 62.

[0052] The above describes the detailed structure of the valve 1 , and the following describes the battery pack using the valve 1 in the present application.

[0053] Fig.10 is a schematic diagram of the matching structure of the battery pack 20 and the valve 1 according to an embodiment of the present application, Fig.11 FIG. 1 is an exploded view of the matching structure of the mounting portion 8 and the valve 1 according to an embodiment of the present application. Fig.10 , Fig.11 , Figure 2 as well as Figure 4 As shown, the battery pack 20 may include a shell wall 201, a mounting portion 8 and a valve 1. The shell wall 201, the mounting portion 8 and the valve 1 may be connected in sequence. The mounting portion 8 may have a pressure relief hole 81. The pressure relief hole 81 may be connected to the gap 41 of the valve body 4. The gas in the battery pack 20 may enter the chamber 5 after passing through the pressure relief hole 81 and the gap 41, and be discharged to the outside of the chamber 5 through the opening 22.

[0054] By adopting the solution of the present application, the gas that needs to be discharged from the battery pack 20 can quickly pass through the pressure relief hole 81, the gap 41, the ventilation channel 6 and the opening 22 in sequence and can eventually be discharged outside the chamber 5 of the valve 1.

[0055] In a possible implementation, the mounting portion 8 may be provided with a plurality of nuts 82 and fasteners 83, the housing 2 may have a first through hole 23, and the valve body 4 may have a second through hole 42. The battery pack 20 may further include bolts 9, and there may be a plurality of bolts 9, at least two of which may pass through the first through hole 23 and be fixed in the nuts 82 of the mounting portion 8, so that the housing 2 may be connected to the mounting portion 8, and at least two of which may pass through the second through hole 42 and be fixed in the nuts 82 of the mounting portion 8, so that the valve body 4 may be connected to the mounting portion 8. The mounting portion 8 may be fastened and connected with a fastening portion (not shown) on the housing wall 201 through the fastener 83, and finally the housing wall 201, the mounting portion 8, and the valve 1 may be connected in sequence.

[0056] The above introduces the detailed structure of the battery pack 20, and the following introduces the vehicle using the battery pack 20 in the present application.

[0057] Fig.12 Schematic diagram of the coordination structure of the battery pack 20, valve 1 and vehicle 30 in the embodiment of the present application. Fig.12 The vehicle 30 may include a chassis 301 and a battery pack 20 , and the battery pack 20 may be connected to the chassis 301 .

[0058] In one possible implementation, combining Fig.12 and Figure 2 As shown, the vehicle 30 may further include a cockpit 302 , and the opening 22 may face away from the cockpit 302 .

[0059] When the battery pack 20 is in thermal runaway, the vehicle 30 proposed in the present application can guide the high-temperature gas in the battery pack 20 through the valve 1 to a direction that does not harm the vehicle 30, that is, the bottom direction. By making the opening 22 of the valve 1 face away from the cockpit 302, the high-temperature gas can be discharged to the bottom of the vehicle 30, thereby preventing the high-temperature gas from harming the driver in the cockpit 302 or the passengers in the vehicle 30.

[0060] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A valve for installation at a pressure relief hole of a battery pack, characterized in that: include: A valve body, provided with a slit, wherein the slit is used to communicate with the pressure relief hole of the battery pack to discharge the gas in the battery pack; A shell having a groove, the shell being used to be connected to the outer wall of the battery pack to enclose a chamber, the groove being at least a part of the chamber, and the shell being provided with an opening; A protective member is arranged in the groove and forms a ventilation channel with the inner wall of the shell. The protective member is arranged between the opening and the valve body to reduce the amount of objects entering the groove from outside the opening and impacting the valve body.

2. The valve according to claim 1, characterized in that: The protective member includes a first baffle, which is at least partially arranged on the inner side of the opening, and the first baffle divides the groove into a accommodating portion and a first ventilation channel. The valve body is located in the accommodating portion, and a first ventilation channel is formed between the first baffle and the side wall of the groove. The opening, the first ventilation channel and the accommodating portion are connected in sequence.

3. The valve according to claim 2, characterized in that: There are two first ventilation channels, and the two first ventilation channels are located on opposite sides of the first baffle.

4. The valve according to claim 2 or 3, characterized in that: The protective member includes a second baffle, which is sealed and connected to the first baffle or is an integrated structure, a gap is formed between the first baffle and the bottom wall of the groove, a second ventilation channel is formed between the second baffle and the bottom wall of the groove, the side of the second baffle away from the bottom wall of the groove is the accommodating portion, the gap is located at one end of the second ventilation channel facing the opening, and the opening, the second ventilation channel and the accommodating portion are connected in sequence.

5. The valve according to claim 4, characterized in that A portion of the first baffle passes through the opening and is disposed outside the chamber.

6. The valve according to claim 5, characterized in that The valve further comprises a connecting piece, the number of which is at least two, the connecting piece is located in the channel, the connecting piece is used to connect the protective piece and the shell, and any two adjacent connecting pieces are arranged at intervals.

7. A valve according to claim 2, 3, 5 or 6, characterized in that: The side wall of the groove is arc-shaped, and the first arc-shaped ventilation channel is formed between the side wall and the first baffle.

8. A battery pack, characterized in that: It includes a shell wall, a mounting portion and the valve according to any one of claims 1 to 7, wherein the shell wall, the mounting portion and the valve are connected in sequence, the mounting portion has a pressure relief hole, the pressure relief hole is connected to the gap of the valve body, the gas in the battery pack enters the chamber after passing through the pressure relief hole and the gap, and is discharged out of the chamber through the opening.

9. A vehicle, characterized in that: The invention comprises a chassis and the battery pack according to claim 8, wherein the battery pack is connected to the chassis.

10. The vehicle according to claim 9, characterized in that The vehicle further includes a cockpit, and the opening faces away from the cockpit.

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