Explosion-proof valve with gas guide function and battery pack

Abstract

The invention relates to the technical field of batteries, in particular to an anti-explosion valve with a gas guide function and a battery pack. The explosion-proof valve with the air guide function comprises a valve body, a valve core and a valve core, when the anti-explosion valve is closed, the blocking piece blocks the exhaust hole, and when the anti-explosion valve is opened, the blocking piece moves in the direction away from the valve body, so that a gas outlet is formed between the valve body and the blocking piece. The gas guide assembly is installed on the exhaust hole and connected with the plugging piece, and a main channel communicating with the gas outlet and a bypass channel communicating with the main channel are formed in the gas guide assembly; when the anti-explosion valve is opened, the main channel is firstly communicated with the gas outlet, and under the action that gas penetrates through the main channel, a low-pressure area is formed in the bypass channel, so that part of gas can be converged into the main channel through the bypass channel. The exhaust speed after the explosion-proof valve is opened is increased, and more heat in the battery pack can be taken away, so that the time for realizing heat balance of the whole pack is shortened, the risk of thermal runaway is reduced, and meanwhile, the damage of high temperature to the structure in the battery pack is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an explosion-proof valve with a gas-conducting function and a battery pack. Background Art

[0002] As the electric vehicle market continues to expand, users and the industry are increasingly concerned about the thermal safety of battery packs. As a critical safety component, explosion-proof valves play a key role in the thermal safety of battery packs. Traditional battery packs use conventional mechanical explosion-proof valves, which rely on pressure differentials to discharge gases. Specifically, when the pressure differential between the inside and outside of the battery pack reaches a predetermined value, the explosion-proof valve opens under the action of the higher internal pressure, releasing high-pressure gas. It then closes when the pressure differential drops below the predetermined value, resulting in limited exhaust capacity. When the explosion-proof valve closes, the pressure differential between the inside and outside of the battery pack is less than the predetermined value, but the pressure inside the battery pack is still higher than the pressure outside the pack. This results in a high residual pressure inside the battery pack after the explosion-proof valve closes. Since high pressure is typically caused by high temperature, the presence of high-temperature gas within the battery pack makes it take a long time for the thermal balance system to regain thermal equilibrium for the entire battery pack, increasing the risk of thermal runaway. High-temperature gas can also damage the battery cells and other structures within the battery pack. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide an explosion-proof valve and a battery pack with an air-conducting function, so as to solve the problem that the exhaust speed of the existing explosion-proof valve is slow after opening, resulting in a long time for the thermal balance system to achieve thermal balance, increasing the risk of thermal runaway, and easily causing damage to the battery cells in the battery pack.

[0004] A first aspect of the present invention provides an explosion-proof valve with a gas-guiding function, comprising: The valve body is provided with an exhaust hole; a blocking member mounted on the valve body; when the explosion-proof valve is closed, the blocking member blocks the exhaust hole; when the explosion-proof valve is opened, the blocking member moves in a direction away from the valve body to form a gas outlet between the valve body and the blocking member; an air guide assembly installed in the exhaust hole and fixedly connected to the blocking member, wherein the air guide assembly is formed with a main channel that can be connected to the gas outlet when the explosion-proof valve is opened and a bypass channel connected to the main channel; When the explosion-proof valve is opened, the main channel is first connected to the gas outlet. As the gas passes through the main channel, a low-pressure area is formed in the bypass channel, allowing part of the gas to flow into the main channel through the bypass channel.

[0005] Preferably, the air guide assembly includes: a connecting piece, fixedly connected to the blocking piece; an air guide tube, sleeved on the outside of the connecting piece, wherein the inner wall of the air guide tube and the outer wall of the connecting piece form the main channel; The bypass component is arranged outside the air duct and forms the bypass channel together with the outer wall of the air duct.

[0006] Preferably, the air guide pipe is provided with an air guide hole connecting the main channel and the bypass channel; A first chamfer is provided on a side of the air guide hole facing the main channel, and a second chamfer is provided on a side of the air guide hole facing the bypass channel.

[0007] Preferably, the bypass assembly comprises: A bypass ring is formed as an annular structure sleeved on the outside of the airway tube, wherein the inner ring wall of the bypass ring and the outer wall of the airway tube form the bypass channel; An air guide plate is arranged on a side of the bypass ring away from the blocking member. The air guide plate and the bypass ring are spaced apart to form a first air inlet for gas to enter the bypass channel.

[0008] Preferably, one end of the main channel away from the blocking member is formed as a second air inlet; The direction in which the gas enters the first gas inlet is set at an angle to the direction in which the gas enters the second gas inlet.

[0009] Preferably, the outer wall of the air duct is provided with a first boss and a second boss; in the direction in which the gas passes through the main channel, the distance between the first boss and the blocking member is smaller than the distance between the second boss and the blocking member; The bypass ring abuts against the first boss, and the air guide plate abuts against the second boss.

[0010] Preferably, the connecting member includes a fixedly connected column portion and a connecting portion, the column portion is provided with a connecting hole at one end facing the blocking member, the blocking member is provided with a mounting portion extending into the connecting hole, and the connecting portion is formed as a plate-like structure provided with a vent hole; A third boss is provided on the inner wall of the air guide tube, and the connecting portion abuts against the third boss.

[0011] Preferably, a flared end with a funnel-shaped structure is formed at one end of the air guide tube facing the blocking member; and along the gas flow path, the flared end is arranged downstream of the bypass channel.

[0012] Preferably, the exhaust hole, the connecting piece, the air guide pipe and the air guide assembly are coaxially arranged.

[0013] A second aspect of the present invention provides a battery comprising the explosion-proof valve with a gas-conducting function as described in any of the above solutions.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The explosion-proof valve with a gas-guiding function of the present invention comprises a valve body with an exhaust hole; a blocking member mounted on the valve body; the blocking member blocks the exhaust hole when the explosion-proof valve is closed, and moves away from the valve body when the explosion-proof valve is opened to form a gas outlet between the valve body and the blocking member; a gas guide assembly is mounted on the exhaust hole and fixedly connected to the blocking member, and the gas guide assembly comprises a main channel that connects to the gas outlet when the explosion-proof valve is opened, and a bypass channel that connects to the main channel; when the explosion-proof valve is opened, the main channel first connects to the gas outlet, and as gas passes through the main channel, a low-pressure area is formed in the bypass channel, allowing some gas to flow into the main channel through the bypass channel, thereby increasing the exhaust speed and exhaust volume after the explosion-proof valve is opened, achieving the purpose of high-speed exhaust of gas in the battery pack, so that the pressure inside the battery pack is close to the pressure outside the battery pack after pressure release; the rapid exhaust of gas can also remove more heat from the battery pack, shortening the time it takes to achieve thermal equilibrium of the entire pack, reducing the risk of thermal runaway of the entire pack, and reducing damage to the internal structure of the battery pack caused by high temperature, thereby ensuring the safety performance and service life of the battery pack.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of an air guide assembly in an explosion-proof valve with an air guide function provided by an embodiment of the present invention; Figure 2 An exploded view of the structure of the gas guide component in the explosion-proof valve with gas guide function provided by an embodiment of the present invention; Figure 3 A cross-sectional view of the structure of an air guide component in an explosion-proof valve with an air guide function provided by an embodiment of the present invention; Figure 4 A partially enlarged structural cross-sectional view of an air guide component in an explosion-proof valve with an air guide function provided by an embodiment of the present invention; Figure 5 A structural cross-sectional view of an explosion-proof valve with an air-guiding function provided by an embodiment of the present invention.

[0018] Icons: 10-valve body; 11-exhaust hole; 20-sealing part; 21-installation part; 30-gas outlet; 100-main channel; 101-second air inlet; 200-bypass channel; 201-first air inlet; 40-connecting part; 41-column part; 411-connecting hole; 42-connecting part; 421-vent; 50-air guide tube; 51-first boss; 52-second boss; 53-third boss; 54-flared end; 55-air guide hole; 551-first chamfer; 552-second chamfer; 60-bypass ring; 70-air guide plate. DETAILED DESCRIPTION

[0019] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0020] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0021] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements present between them.

[0022] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0023] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0024] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be located "below" or "lower" relative to the other element. Thus, the term "above" encompasses both the orientations of "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein will be interpreted accordingly.

[0025] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0027] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0028] According to a first aspect of the present invention, there is provided an explosion-proof valve with an air guide function, which includes a valve body 10, a blocking member 20 and an air guide assembly.

[0029] Hereinafter, the specific structures of the above components of the explosion-proof valve with an air guide function according to this embodiment will be described.

[0030] In this embodiment, if Figure 5 As shown, the valve body 10 is mounted on the outer shell of the battery pack, for example, by welding. The valve body 10 is provided with a vent hole 11, which connects the inside and outside of the battery pack. The vent hole 11 can be a through hole in a circular, elliptical, or polygonal shape. The blocking member 20 is mounted on the side of the valve body 10 facing the outside of the battery pack. The main body of the blocking member 20 is formed into a plate-like structure and is larger than the size of the vent hole 11. This allows the blocking member 20 to block the vent hole 11 when the explosion-proof valve is closed. When the pressure difference between the inside and outside of the battery pack reaches a preset value requiring exhaust and pressure relief, the explosion-proof valve opens under the action of the internal pressure of the battery pack, driving the blocking member 20 to move away from the valve body 10, thereby forming a gas outlet 30 between the valve body 10 and the blocking member 20. In this embodiment, the gas outlet 30 can be formed into a ring structure.

[0031] In this embodiment, if Figure 5 As shown, the air guide assembly is installed in the exhaust hole 11 and is fixedly connected to the blocking member 20, so that the air guide assembly can move synchronously with the blocking member 20. The blocking member 20 and the air guide assembly are preferably threadedly connected for easy disassembly.

[0032] like Figures 1 to 5 As shown, the gas guide component is formed with a main channel 100 that can be connected to the gas outlet 30 when the explosion-proof valve is opened, and a bypass channel 200 that is connected to the main channel 100 when the explosion-proof valve is opened or closed; the explosion-proof valve starts the gas release under the action of the pressure difference. When the explosion-proof valve is opened, the main channel 100 is first connected to the gas outlet 30. Under the action of the gas passing through the main channel 100, a low-pressure area is formed in the bypass channel 200, so that the part of the gas that needs to be discharged can be merged into the main channel 100 through the bypass channel 200, thereby achieving the goal of inhaling more gas in the bag through the bypass channel. The gas channel 200 quickly merges into the main channel 100 and is discharged from the gas outlet 30, so as to achieve the purpose of instantaneous high discharge of the internal gas, and realize that the pressure inside the pack is close to the pressure outside the pack after the pressure is released. Compared with the traditional explosion-proof valve structure, the explosion-proof valve of the present invention increases the amount of gas discharged by 1 to 2 times when it is opened once, thereby improving the exhaust speed after the explosion-proof valve is opened and increasing the exhaust volume; the rapid discharge of gas can also take away more heat in the battery pack, shortening the time to achieve thermal balance of the entire pack, reducing the risk of thermal runaway of the entire pack, and at the same time reducing the damage of high temperature to the structure inside the battery pack, thereby ensuring the safety performance and service life of the battery pack.

[0033] It should be noted that, in most cases, after the explosion-proof valve is opened, the pressure inside the package will drop to below the preset pressure differential at a relatively fast rate. Ordinary mechanical explosion-proof valves rely solely on the pressure differential to discharge gas, and therefore have limited exhaust capacity. The explosion-proof valve with a gas-guiding function of the present invention utilizes the vacuum effect formed by the flow of gas in the device, the increase in flow rate accompanied by the decrease in pressure, to achieve the goal of sucking in more gas inside the package and quickly converging it through the bypass channel 200, greatly improving the explosion-proof valve's ability to instantly discharge gas. Therefore, it increases the amount of heat inside the package brought out by the gas when the explosion-proof valve is opened once, which is beneficial to accelerating the thermal balance inside the package, reducing the risk of thermal runaway, and improving the thermal stability of the system; at the same time, it reduces the temperature inside the package and reduces the damage to the parts inside the package caused by high temperature.

[0034] In this embodiment, the cross-sectional area of ​​the main channel 100 is larger than the cross-sectional area of ​​the bypass channel 200. It should be noted that, Figure 5 The arrows in the figure indicate the flow path of the gas.

[0035] Furthermore, in this embodiment, Figures 1 to 5 As shown, the air guide assembly includes a connector 40, an air guide tube 50 and a bypass assembly, wherein the connector 40 is fixedly connected to the blocking member 20; the air guide tube 50 is formed into a tubular structure and is sleeved on the outside of the connector 40, and the inner wall of the air guide tube 50 and the outer wall of the connector 40 form a main channel 100, so that the main channel 100 is formed into an annular structure; the bypass assembly is arranged on the outside of the air guide tube 50 and is fixedly connected to the air guide tube 50, and the bypass assembly and the outer wall of the air guide tube 50 form a bypass channel 200, and the bypass channel 200 is formed into an annular structure surrounded on the outside of the main channel 100.

[0036] Preferably, in this embodiment, Figures 1 to 3 As shown, the exhaust hole 11, the connecting piece 40, the air guide pipe 50 and the air guide assembly (i.e., the bypass ring 60 and the air guide plate 70 described below) are coaxially arranged, so that the main channel 100 and the bypass channel 200 are formed into an annular structure with uniform thickness between the inner ring wall and the outer ring wall to ensure smooth discharge of gas.

[0037] In this embodiment, if Figure 2 and Figure 3 As shown, a flared end 54 with a funnel-shaped structure is formed at one end of the air duct 50 facing the sealing member 20, and the radial dimension of the flared end 54 facing the sealing end is larger than the radial dimension of the flared end 54 facing the interior of the battery pack; along the gas flow path, the flared end 54 is arranged downstream of the bypass channel 200, so as to ensure that after the gas is merged into the main channel 100 from the bypass channel 200, the exhaust demand of increased exhaust volume is met.

[0038] In this embodiment, if Figures 1 to 4As shown, the air duct 50 is provided with an air guide hole 55 connecting the main channel 100 and the bypass channel 200. Preferably, there are multiple air guide holes 55, which are evenly spaced around the side wall of the air duct 50. Figure 2 As shown, the air guide holes 55 can be formed as strip-shaped holes.

[0039] In this embodiment, if Figure 3 and Figure 4 As shown, the side of the air guide hole 55 facing the main channel 100 is provided with a first chamfer 551, and the side of the air guide hole 55 facing the bypass channel 200 is provided with a second chamfer 552 to facilitate the smooth passage of gas. Preferably, the first chamfer 551 and the second chamfer 552 are both formed as 45-degree chamfers, wherein the length of the right-angled side of the first chamfer 551 is greater than the length of the right-angled side of the second chamfer 552, so that the gas in the bypass channel 200 can be quickly merged into the main channel 100.

[0040] Furthermore, in this embodiment, if Figures 1 to 5 As shown, the bypass assembly includes a bypass ring 60 and an air guide plate 70. The bypass ring 60 is formed as an annular structure that is sleeved on the outside of the air guide tube 50. The inner ring wall of the bypass ring 60 and the outer wall of the air guide tube 50 form a bypass channel 200. The bypass ring 60 has an opening facing the inside of the battery pack; the air guide plate 70 is formed as a plate-like structure arranged on the side of the bypass ring 60 away from the sealing member 20. The air guide plate 70 is spaced apart from the bypass ring 60 so that a gap is formed between the air guide plate 70 and the open side of the bypass ring 60 to form a first air inlet 201 for gas to enter the bypass channel 200. In this way, under the action of the gas flowing through the main channel 100, the air cavity area surrounded by the air guide tube 50 and the bypass ring 60 forms a low-pressure area, which attracts the gas in the battery pack to enter the low-pressure area through the first air inlet 201 and then merge into the main channel 100, thereby realizing rapid discharge of the gas in the battery pack.

[0041] In this embodiment, if Figures 3 to 5 As shown, one end of the main channel 100 away from the blocking member 20 is formed as a second air inlet 101; the direction in which the gas enters the first air inlet 201 is set at an angle to the direction in which the gas enters the second air inlet 101. Preferably, the direction in which the gas enters the first air inlet 201 is perpendicular to the direction in which the gas enters the second air inlet 101, thereby facilitating the full inhalation of the gas in the battery pack.

[0042] In this embodiment, if Figure 2 and Figure 3As shown, the outer wall of the air guide tube 50 is provided with a first boss 51 and a second boss 52. In the direction of gas passing through the main channel 100, the distance between the first boss 51 and the blocking member 20 is smaller than the distance between the second boss 52 and the blocking member 20. The bypass ring 60 abuts the first boss 51, and the air guide plate 70 abuts the second boss 52. This achieves axial positioning of the bypass ring 60 and the air guide plate 70 relative to the air guide tube 50, facilitating their respective welding connection to the air guide tube 50. Specifically, the surface of the bypass ring 60 axially facing the blocking member 20 is welded to the circumferential outer wall of the air guide tube 50, while the surface of the air guide plate 70 axially facing away from the blocking member 20 is welded to the circumferential outer wall of the air guide tube 50.

[0043] Furthermore, in this embodiment, Figures 1 to 3 As shown, the connecting member 40 includes a columnar portion 41 and a connecting portion 42 fixedly connected to each other. The columnar portion 41 is formed into a circular structure. A connecting hole 411 is provided at one end of the columnar portion 41 facing the blocking member 20. A mounting portion 21 extending into the connecting hole 411 is formed on the blocking member 20, thereby achieving a fixed connection between the blocking member 20 and the connecting member 40. The assembly method of the connecting hole 411 and the mounting portion 21 can be a threaded connection or a snap connection, etc. The connecting portion 42 is formed into a plate-like structure with vent holes 421. This improves the structural strength of the air guide assembly while ensuring that gas in the main channel 100 can enter the gas outlet 30 through the vent holes 421, thereby achieving rapid gas discharge. Multiple vent holes 421 are provided, and the multiple vent holes 421 are evenly spaced around the circumference of the cylindrical portion 41. A third boss 53 is provided on the inner wall of the air guide tube 50, and the connecting portion 42 abuts against the third boss 53, thereby achieving axial positioning of the connecting member 40 and the air guide tube 50. Preferably, the surface of the connecting portion 42 facing the blocking member 20 is welded to the inner wall of the air guide tube 50.

[0044] According to the explosion-proof valve with a gas-guiding function of the present invention, a valve body is provided with an exhaust hole; a blocking member is mounted on the valve body; when the explosion-proof valve is closed, the blocking member blocks the exhaust hole; when the explosion-proof valve is opened, the blocking member moves away from the valve body to form a gas outlet between the valve body and the blocking member; a gas guide assembly is mounted on the exhaust hole and fixedly connected to the blocking member, and the gas guide assembly includes a main channel that connects to the gas outlet when the explosion-proof valve is opened, and a bypass channel that connects to the main channel; when the explosion-proof valve is opened, the main channel is first connected to the gas outlet, and as gas passes through the main channel, a low-pressure area is formed in the bypass channel, allowing some gas to flow into the main channel through the bypass channel. This increases the exhaust speed and exhaust volume after the explosion-proof valve is opened, achieving high-speed exhaust of gas from the battery pack, so that the pressure inside the battery pack is close to the pressure outside the battery pack after pressure release; the rapid exhaust of gas also removes more heat from the battery pack, shortening the time it takes to achieve thermal equilibrium of the entire pack, reducing the risk of thermal runaway of the entire pack, and reducing damage to the internal structure of the battery pack caused by high temperature, thereby ensuring the safety performance and service life of the battery pack.

[0045] A second aspect of the present invention provides a battery pack comprising the above-mentioned explosion-proof valve with a gas-conducting function, thereby having all the beneficial effects of the explosion-proof valve with a gas-conducting function, which will not be described in detail here. Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. An explosion-proof valve with air-conducting function, characterized in that: include: The valve body is provided with an exhaust hole; a blocking member mounted on the valve body; when the explosion-proof valve is closed, the blocking member blocks the exhaust hole; when the explosion-proof valve is opened, the blocking member moves in a direction away from the valve body to form a gas outlet between the valve body and the blocking member; an air guide assembly installed in the exhaust hole and fixedly connected to the blocking member, wherein the air guide assembly is formed with a main channel that can be connected to the gas outlet when the explosion-proof valve is opened and a bypass channel connected to the main channel; When the explosion-proof valve is opened, the main channel is first connected to the gas outlet. As the gas passes through the main channel, a low-pressure area is formed in the bypass channel, allowing part of the gas to flow into the main channel through the bypass channel.

2. The explosion-proof valve with air-guiding function according to claim 1, characterized in that: The air guide assembly comprises: a connecting piece, fixedly connected to the blocking piece; an air guide tube, sleeved on the outside of the connecting piece, wherein the inner wall of the air guide tube and the outer wall of the connecting piece form the main channel; The bypass component is arranged outside the air duct and forms the bypass channel together with the outer wall of the air duct.

3. The explosion-proof valve with air-guiding function according to claim 2, characterized in that: The air guide pipe is provided with an air guide hole connecting the main channel and the bypass channel; A first chamfer is provided on a side of the air guide hole facing the main channel, and a second chamfer is provided on a side of the air guide hole facing the bypass channel.

4. The explosion-proof valve with air-guiding function according to claim 2, characterized in that: The bypass assembly comprises: A bypass ring is formed as an annular structure sleeved on the outside of the airway tube, wherein the inner ring wall of the bypass ring and the outer wall of the airway tube form the bypass channel; An air guide plate is arranged on a side of the bypass ring away from the blocking member. The air guide plate and the bypass ring are spaced apart to form a first air inlet for gas to enter the bypass channel.

5. The explosion-proof valve with air-guiding function according to claim 4, characterized in that: One end of the main channel away from the blocking member is formed as a second air inlet; The direction in which the gas enters the first gas inlet is set at an angle to the direction in which the gas enters the second gas inlet.

6. The explosion-proof valve with air-guiding function according to claim 4, characterized in that: The outer wall of the air duct is provided with a first boss and a second boss; in the direction in which gas passes through the main channel, the distance between the first boss and the blocking member is smaller than the distance between the second boss and the blocking member; The bypass ring abuts against the first boss, and the air guide plate abuts against the second boss.

7. The explosion-proof valve with air-guiding function according to claim 2, characterized in that: The connecting member includes a fixedly connected column portion and a connecting portion, the column portion having a connecting hole formed at one end facing the blocking member, the blocking member having a mounting portion extending into the connecting hole, and the connecting portion being a plate-shaped structure with a vent hole formed therein; A third boss is provided on the inner wall of the air guide tube, and the connecting portion abuts against the third boss.

8. The explosion-proof valve with air-guiding function according to claim 2, characterized in that: An expanded end with a funnel-shaped structure is formed at one end of the air guide tube facing the blocking member; along the gas flow path, the expanded end is arranged downstream of the bypass channel.

9. The explosion-proof valve with air-guiding function according to claim 2, characterized in that: The exhaust hole, the connecting piece, the air guide pipe and the air guide component are coaxially arranged.

10. A battery pack, characterized in that: An explosion-proof valve with a gas-conducting function comprising any one of claims 1 to 9.

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