Explosion-proof valve assembly, battery pack and electric device
By designing an explosion-proof valve assembly with a claw structure, the problem of the explosion-proof valve being difficult to separate when the internal gas pressure of the battery is high is solved, enabling safe venting during battery thermal runaway, reducing the risk of battery pack explosion, and improving the safety and reliability of the battery pack.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-12-19
- Publication Date
- 2026-06-25
AI Technical Summary
In existing technologies, the explosion-proof valve is tightly connected to the battery's vent, making it difficult to separate when the internal gas pressure of the battery is high, thus increasing the risk of battery explosion.
An explosion-proof valve assembly was designed. The abutment part of the claw is opposite to the limiting surface of the mounting plate, and the connecting part is connected to the main body to meet a specific length ratio relationship, so that the abutment part can be easily deformed under external impact and thus separate from the mounting plate.
When the battery experiences thermal runaway and the air pressure is not excessive, the explosion-proof valve assembly is easier to separate from the mounting plate, reducing the air pressure inside the battery pack, decreasing the risk of explosion, and improving the safety and reliability of the battery pack.
Smart Images
Figure CN2025144113_25062026_PF_FP_ABST
Abstract
Description
Explosion-proof valve assemblies, battery packs and electrical equipment
[0001] This disclosure claims priority to Chinese Patent Application No. 202411914658.3, filed on December 20, 2024, entitled "Explosion-proof Valve Assembly, Battery Pack and Electrical Equipment", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This disclosure relates to an explosion-proof valve assembly, a battery pack, and electrical equipment, belonging to the field of battery technology. Background Technology
[0003] In recent years, with the gradual increase in sales of new energy vehicles, the demand for new energy vehicle batteries has also increased, and correspondingly, the safety and reliability of batteries have received more and more attention. If thermal runaway occurs during battery operation, the gas inside the battery needs to be discharged through the vent valve to reduce the gas pressure inside the battery and avoid the risk of explosion due to excessive gas pressure inside the battery.
[0004] Currently, in order to ensure the stability and reliability of the explosion-proof valve and the battery, the explosion-proof valve needs to be tightly connected to the vent on the battery. However, this also means that the explosion-proof valve can only be separated from the battery when the internal air pressure is relatively high, thus increasing the risk of the battery exploding without venting. Summary of the Invention
[0005] This disclosure provides an explosion-proof valve assembly, a battery pack, and an electrical device, which solves the problem in related technologies that the explosion-proof valve of the battery pack is not easy to fall off from the vent.
[0006] In a first aspect, this disclosure provides an explosion-proof valve assembly, comprising:
[0007] Mounting plate, including vent holes and a limiting surface located on one side of the vent holes;
[0008] The valve body is opposite to the exhaust port and located on the side of the mounting plate facing away from the limiting surface;
[0009] The chuck includes a main body, a connecting part, and a supporting part. The first end of the main body is connected to the valve body, and the second end of the main body passes through the vent hole. The connecting part is connected to the main body and is located between the first end and the second end. The supporting part is connected to the side of the connecting part away from the main body. The connecting part is opposite to the vent hole, and the supporting part is opposite to the limiting surface.
[0010] Wherein, in the direction from the connecting part to the abutting part, the length of the abutting part is a, and the sum of the lengths of the connecting part and the abutting part is Y, and a and Y satisfy the following relationship: a = 0.25Y - 0.5Y.
[0011] In some embodiments, the side of the abutment portion facing the limiting surface is a plane.
[0012] In some embodiments, the width of the abutment is Wb in a direction perpendicular to the direction from the connecting portion to the abutment and perpendicular to the axial direction of the vent hole, and Wb satisfies the following relationship with Y: Wb = 2Y - 3Y.
[0013] In some embodiments, there are multiple claws, which are distributed circumferentially along the valve body.
[0014] In some embodiments, the outer wall of the main body facing the connecting part is an arc surface, and the outer walls of the multiple main bodies facing the connecting part are all located on a preset arc. The circumference of the preset arc is L, and the sum of the widths Wb of the multiple abutting parts is S. S and L satisfy the following relationship: S = 0.34L ~ 0.47L.
[0015] In some implementations, Y is 1.5mm-3mm.
[0016] In some embodiments, the main body has a cantilever hole, the main body includes a connecting beam and two cantilever beams, the two cantilever beams are located on both sides of the cantilever hole and are distributed along the preset arc, the connecting beam is located on the side of the cantilever hole away from the valve body, one end of each of the two cantilever beams is connected to the valve body, and the other end of each of the two cantilever beams is connected to the connecting beam.
[0017] In some embodiments, the cantilever hole passes through the main body and extends to the valve body from the side opposite to the connecting beam.
[0018] In some embodiments, the second end of the main body is located on the connecting beam, the end of the cantilever beam connected to the valve body is the first end of the main body, and the connecting part is disposed on the connecting beam.
[0019] In some embodiments, the thickness of the cantilever beam is F in the direction from the connecting portion to the supporting portion, and the thickness of the valve body is T in the axial direction of the exhaust port, wherein the ratio of F to T is not less than 1.
[0020] In some embodiments, the width of the cantilever beam is b in a direction perpendicular to the direction from the connecting portion to the supporting portion and perpendicular to the axial direction of the exhaust port, and the thickness of the valve body is T in the axial direction of the exhaust port, wherein the ratio of b to T is not less than 1.
[0021] In some embodiments, the length of the cantilever beam is H in the direction from the first end to the second end of the main body, and the thickness of the valve body is T in the axial direction of the exhaust port, wherein the ratio of H to T is not less than 8.
[0022] In some embodiments, the distance between the two cantilever beams is D, the thickness of the valve body in the axial direction of the exhaust port is T, and the ratio of D to T is not less than 2.
[0023] In some embodiments, the explosion-proof valve assembly further includes a limiting wall connected to the valve body, the limiting wall passing through the vent hole, and the limiting wall abutting against the wall surface of the mounting plate located within the vent hole.
[0024] In some embodiments, there are multiple limiting barriers, and the multiple limiting barriers and multiple claws are alternately arranged along the circumference of the valve body.
[0025] In some embodiments, the explosion-proof valve assembly further includes a connecting block that is connected to all of the plurality of limiting retaining walls.
[0026] In some embodiments, the orthographic projection of the connecting block onto the valve body is located at the middle part of the valve body.
[0027] In some embodiments, the explosion-proof valve assembly further includes a breathable membrane, the valve body has a vent hole that extends through the valve body along its thickness direction, and the breathable membrane is disposed on the valve body and covers the vent hole.
[0028] In some embodiments, the explosion-proof valve assembly further includes a cover connected to the valve body and covering the valve body.
[0029] In some embodiments, the claws are made of polymer materials.
[0030] In some embodiments, the claws are made of fiber-reinforced resin.
[0031] Secondly, based on the explosion-proof valve assembly described above, this disclosure also provides a battery pack, including a tray, a battery, and the explosion-proof valve assembly described above. The tray includes the mounting plate and a cavity. The vent hole communicates with the cavity, and the battery is disposed in the cavity.
[0032] In some embodiments, the vent hole includes a first section and a second section, the first section being connected to the second section, the first section being adjacent to the valve body, and the second section being located on the side of the first section away from the valve body;
[0033] In the direction from the first hole segment to the second hole segment, the inner diameter of the first hole segment gradually decreases.
[0034] Thirdly, based on the battery pack described above, this disclosure also provides an electrical device including the battery pack described above.
[0035] In the explosion-proof valve assembly, battery pack, and electrical equipment disclosed herein, the vent holes of the valve body and mounting plate are opposite each other, allowing the valve body to cover the vent holes on the mounting plate. The abutting portion in the claw is opposite to and abuts against the limiting surface of the mounting plate, allowing the abutting portion to engage with the cover in the direction from the main body to the cover, thereby fixing the abutting portion to the tray, and consequently fixing the explosion-proof valve to the tray. The abutting portion is connected to the main body via a connecting portion, creating a gap between the abutting portion and the main body. This makes it easier for the abutting portion to deform and separate from the mounting plate when subjected to external impact, thus preventing the claw from being too tightly connected to the mounting plate and unable to separate. a = 0.25Y ~ 0.5Y. When the lengths of the connecting portion and the abutting portion satisfy the above relationship, the limiting engagement between the abutting portion and the mounting plate is stable, and the abutting portion is also easier to deform and separate from the abutting surface after being subjected to external impact.
[0036] The battery pack disclosed herein includes the aforementioned explosion-proof valve assembly. When the battery experiences thermal runaway and releases gas, this gas acts on the explosion-proof valve, making the retaining part more easily deformable and no longer abutting against the limiting surface. This allows the valve body and the latch to more easily separate from the vent hole of the mounting plate. Thus, in the event of thermal runaway in the battery pack before the internal gas pressure becomes excessive, the vent hole can be opened to reduce the internal gas pressure, thereby lowering the risk of explosion due to excessive internal gas pressure.
[0037] The electrical equipment provided in this disclosure includes the aforementioned battery pack, which makes the electrical equipment safer and more reliable during operation. Attached Figure Description
[0038] Figure 1 is a schematic diagram of an explosion-proof valve assembly according to an embodiment of this disclosure;
[0039] Figure 2 is a magnified view of area A in Figure 1;
[0040] Figure 3 is a schematic diagram of the claw of the explosion-proof valve assembly according to an embodiment of the present disclosure;
[0041] Figure 4 is a schematic diagram of the limiting barrier of the explosion-proof valve assembly according to an embodiment of this disclosure;
[0042] Figure 5 is a front view schematic diagram of the claw of the explosion-proof valve assembly according to an embodiment of the present disclosure;
[0043] Figure 6 is a schematic diagram of the connection between the cantilever beam and the connecting beam of the explosion-proof valve assembly according to an embodiment of this disclosure;
[0044] Figure 7 is a schematic diagram of the tray of the battery pack according to an embodiment of the present disclosure;
[0045] Figure 8 is a schematic diagram of the vent holes of the tray of the battery pack according to an embodiment of the present disclosure;
[0046] Figure 9 is a schematic diagram showing the connection between the explosion-proof valve assembly and the battery pack provided in an embodiment of this disclosure;
[0047] Figure 10 is a schematic diagram of the connection between the battery pack and the electrical equipment provided in the embodiments of this disclosure.
[0048] Reference numerals: 10-Explosion-proof valve assembly, 20-Battery pack, 30-Electrical equipment, 100-Valve body, 110-Ventilation hole, 120-Ventilating membrane, 200-Claw, 210-Main body, 211-First end, 212-Second end, 213-Cantilever hole, 214-Cantilever beam, 215-Connecting beam, 220-Connecting part, 230-Supporting part, 231-Guide surface, 300-Limiting barrier, 310-Connecting block, 400-Tray, 410-Exhaust hole, 411-First hole section, 412-Second hole section, 420-First side, 430-Second side, 431-Limiting surface, 440-Cavity, 450-Mounting plate, 500-Sealing ring, 600-Top cover. Detailed Implementation
[0049] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.
[0050] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0052] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.
[0053] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0055] In recent years, with the gradual increase in sales of new energy vehicles, the demand for new energy vehicle batteries has also increased, and correspondingly, the safety and reliability of batteries have received more and more attention. If thermal runaway occurs during battery operation, the gas inside the battery needs to be discharged through the vent valve to reduce the gas pressure inside the battery and avoid the risk of explosion due to excessive gas pressure inside the battery.
[0056] Currently, in order to ensure the stability and reliability of the explosion-proof valve and the battery, the explosion-proof valve needs to be tightly connected to the vent on the battery. However, this also means that the explosion-proof valve can only be separated from the battery when the internal air pressure is relatively high, thus increasing the risk of the battery exploding without venting.
[0057] In the explosion-proof valve assembly, battery pack, and electrical equipment disclosed herein, the vent holes of the valve body and mounting plate are opposite each other, allowing the valve body to cover the vent holes on the mounting plate. The abutting portion in the claw is opposite to and abuts against the limiting surface of the mounting plate, allowing the abutting portion to engage with the cover in the direction from the main body to the cover, thereby fixing the abutting portion to the tray, and consequently fixing the explosion-proof valve to the tray. The abutting portion is connected to the main body via a connecting portion, creating a gap between the abutting portion and the main body. This makes it easier for the abutting portion to deform and separate from the mounting plate when subjected to external impact, thus preventing the claw from being too tightly connected to the mounting plate and unable to separate. a = 0.25Y ~ 0.5Y. When the lengths of the connecting portion and the abutting portion satisfy the above relationship, the limiting engagement between the abutting portion and the mounting plate is stable, and the abutting portion is also easier to deform and separate from the abutting surface after being subjected to external impact.
[0058] The battery pack disclosed herein includes the aforementioned explosion-proof valve assembly. When the battery experiences thermal runaway and releases gas, this gas acts on the explosion-proof valve, making the retaining part more easily deformable and no longer abutting against the limiting surface. This allows the valve body and the latch to more easily separate from the vent hole of the mounting plate. Thus, in the event of thermal runaway in the battery pack before the internal gas pressure becomes excessive, the vent hole can be opened to reduce the internal gas pressure, thereby lowering the risk of explosion due to excessive internal gas pressure.
[0059] The electrical equipment provided in this disclosure includes the aforementioned battery pack, which makes the electrical equipment safer and more reliable during operation.
[0060] The explosion-proof valve assembly, battery pack, and electrical equipment provided in this disclosure will be described in detail below with reference to specific embodiments.
[0061] This disclosure discloses a battery pack 20, as shown in Figures 1 to 3, 7, 8 and 9, comprising a battery, a tray 400 and an explosion-proof valve assembly 10. This battery pack 20 can be used in electrical equipment 30, specifically in new energy vehicles.
[0062] The tray 400 is the basic component of the battery pack 20 of this disclosure. The tray 400 can provide a mounting base for at least some other components of the battery pack 20 and serves to protect at least some of these other components. The tray 400 can be made of metal, which gives it better structural strength, thereby improving its durability and reliability.
[0063] The tray 400 may be provided with a cavity 440, and the surface of the tray 400 has a vent 410 communicating with the cavity 440. Multiple batteries may be provided, and multiple batteries may be placed within the cavity 440 of the tray 400. At least a portion of the explosion-proof valve assembly 10 is detachably disposed at the vent 410, allowing the explosion-proof valve assembly 10 to seal the vent 410, preventing external impurities from entering the cavity 440 and thus protecting the batteries within the cavity 440.
[0064] When the battery in cavity 440 experiences thermal runaway, it releases gas, increasing the pressure within cavity 440. This pressure acts on the explosion-proof valve assembly 10. When the pressure reaches a certain level, the gas can push at least part of the explosion-proof valve assembly 10 away from the tray 400, opening the vent 410. This allows the gas released during thermal runaway to escape from cavity 440 through the vent 410, reducing the pressure within cavity 440 and preventing an explosion of the battery pack 20 due to excessive pressure, thus improving the safety of the battery pack 20.
[0065] It should be noted that when the explosion-proof valve assembly 10 is installed on the vent 410 of the tray 400, the explosion-proof valve assembly 10 needs to be connected to the tray 400 in a relatively stable and reliable manner to prevent the explosion-proof valve assembly 10 from falling off the tray 400 when the battery pack 20 is in a normal state. In addition, the explosion-proof valve assembly 10 should not be connected to the tray 400 too stably to avoid the explosion-proof valve assembly 10 being unable to separate from the tray 400 when the battery pack 20 experiences thermal runaway.
[0066] To this end, this disclosure also proposes an explosion-proof valve assembly 10, which can be applied to the battery pack 20 described above. The explosion-proof valve assembly 10 can separate from the tray 400 when the battery in the cavity 440 of the tray 400 experiences thermal runaway and the gas pressure in the cavity 440 is relatively low, thereby improving the safety of the battery pack 20.
[0067] Referring to Figures 1 to 3, the explosion-proof valve assembly 10 of this disclosure includes a mounting plate 450, a valve body 100, and a claw 200. The valve body 100 is the basic component of the explosion-proof valve assembly 10 and can provide a mounting base for at least some other components of the explosion-proof valve assembly 10. The valve body 100 can be made of plastic, which reduces the manufacturing cost of the valve body 100, thereby reducing the manufacturing cost of the explosion-proof valve assembly 10 and ultimately reducing the manufacturing cost of the battery pack 20.
[0068] The tray 400 may include a mounting plate 450, meaning the mounting plate 450 can be part of the tray 400. Specifically, the mounting plate 450 and other parts of the tray 400 can be an integral structure, meaning the other parts of the tray 400 and the mounting plate 450 are manufactured using an integral molding process. This results in better connection stability between the mounting plate 450 and the other parts of the tray 400, making the overall structure of the tray 400 more stable and reliable. Of course, the mounting plate 450 and other parts of the tray 400 can also be manufactured separately and then connected. Specifically, they can be fixed by snap-fit, adhesive, or threaded connection, and this disclosure does not impose any limitations on this.
[0069] The valve body 100 is positioned opposite the vent hole 410 of the tray 400, allowing the valve body 100 to cover the vent hole 410 of the tray 400. Specifically, the valve body 100 is located outside the cavity 440 of the tray 400, and the outer diameter of the valve body 100 can be set to be larger than the inner diameter of the vent hole 410, so that the valve body 100 can completely cover the vent hole 410. This also allows the valve body 100 to mutually limit the movement of the tray 400, preventing the valve body 100 from falling from the vent hole 410 into the cavity 440 of the tray 400.
[0070] Specifically, the tray 400 has a first side 420 and a second side 430 on opposite sides in its thickness direction. The surface of the first side 420 is the outer surface of the tray 400, and the surface of the second side 430 is the inner surface of the tray 400, i.e., the inner wall of the cavity 440. The direction from the first side 420 to the second side 430 is the X direction in Figure 1. The tray 400 has a limiting surface 431 located on one side of the vent 410, and the limiting surface 431 is located on the surface of the second side 430 of the tray 400. The valve body 100 is opposite to the first side 420 of the tray 400. Since the outer diameter of the valve body 100 is larger than the inner diameter of the vent 410, the valve body 100 can be fastened to the first side 420 of the tray 400, so that the valve body 100 and the tray 400 are mutually limited in the direction from the first side 420 to the second side 430.
[0071] The claw 200 is connected to the valve body 100, and at least a portion of the claw 200 passes through the vent hole 410 of the tray 400, allowing a portion of the claw 200 to be located on the side of the tray 400 facing away from the valve body 100. A portion of the claw 200 is opposite to and abuts against the limiting surface 431, allowing the claw 200 and the tray 400 to engage in a limiting fit in the direction from the claw 200 to the valve body 100, thereby ensuring a reliable connection between the explosion-proof valve assembly 10 and the tray 400.
[0072] Specifically, referring to Figures 2 and 3, the claw 200 may include a main body 210, a connecting part 220, and a supporting part 230. The main body 210 is the portion of the claw 200 located to the left of the dashed line M in Figure 2; the connecting part 220 is the portion of the claw 200 located between dashed lines M and N in Figure 2; and the supporting part 230 is the portion of the claw 200 located to the right of dashed line N in Figure 2. It should be noted that the dashed lines in the figures are used to indicate the boundaries between the main body 210, the connecting part 220, and the supporting part 230 for ease of understanding of the structure, and should not be construed as limiting the structure of the claw 200. The claw 200 is also made of plastic, which further reduces the manufacturing cost of the explosion-proof valve assembly 10, thereby further reducing the manufacturing cost of the battery pack 20. The main body 210 is the basic component of the claw 200, and can provide a mounting base for at least some other components of the claw 200. The main body 210 includes a first end 211 and a second end 212. The first end 211 of the main body 210 is connected to the valve body 100, and the main body 210 passes through the vent hole 410 of the tray 400, such that the second end 212 of the main body 210 is located on the side of the mounting plate 450 facing away from the valve body 100. The connecting part 220 is connected to the main body 210, and the connecting part 220 is located between the first end 211 and the second end 212 of the main body 210. Specifically, the connecting part 220 is connected to the side wall of the main body 210, and the connecting part 220 is located on the side of the tray 400 facing away from the valve body 100. The abutting part 230 is connected to the connecting part 220, and specifically connected to the end of the connecting part 220 facing away from the main body 210. The abutting part 230 is opposite to and abuts against the limiting surface 431 of the tray 400, such that the abutting part 230 is located on the second side 430 of the tray 400. Thus, the supporting part 230 can be limited and engaged with the valve body 100 in the direction from the main body 210 to the valve body 100, that is, in the direction from the second side 430 to the first side 420. Since the valve body 100 and the tray 400 are limited and engaged in the direction from the first side 420 to the second side 430, and the supporting part 230 and the tray 400 are limited and engaged in the direction from the second side 430 to the first side 420, the explosion-proof valve assembly 10 can be fixed on the tray 400 as a whole. In this way, the explosion-proof valve assembly 10 can block the vent 410 and will not easily separate from the tray 400.
[0073] The connecting part 220 is opposite to the vent 410 of the tray 400, that is, the connecting part 220 is misaligned with the limiting surface 431 of the tray 400, so that the connecting part 220 does not contact the limiting surface 431. When the battery in the cavity 440 of the tray 400 experiences thermal runaway, causing the gas pressure in the cavity 440 to increase, the gas in the cavity 440 can act on the supporting part 230, the connecting part 220, and the main body 210, so that the explosion-proof valve assembly 10 as a whole is subjected to a force from the second side 430 to the first side 420. The supporting part 230 is connected to the main body 210 through the connecting part 220, so that there is a gap between the supporting part 230 and the main body 210, so that the supporting part 230 is more likely to bend and deform relative to the main body 210 under force. When the gas generated by the battery thermal runaway acts on the explosion-proof valve assembly 10, the supporting part 230 is more easily deformed by force and no longer abuts against the limiting surface 431, making it easier for the explosion-proof valve assembly 10 to separate from the vent 410 of the tray 400. In this way, if the battery pack 20 experiences thermal runaway and the gas pressure inside the tray 400 is low, the vent 410 can open to reduce the gas pressure inside the battery pack 20, thereby reducing the risk of explosion due to excessive gas pressure inside the battery pack 20.
[0074] Referring to Figure 3, in the direction from the connecting part 220 to the supporting part 230, the length of the supporting part 230 is 'a', and the sum of the lengths of the supporting part 230 and the connecting part 220 is 'Y'. 'a' and 'Y' satisfy the following relationship: a = 0.25Y ~ 0.5Y. When the lengths of the connecting part 220 and the supporting part 230 satisfy the above relationship, the supporting part 230 and the tray 400 can be stably matched in the upper limit direction from the second side 430 to the first side 420, and the supporting part 230 is more easily bent and deformed relative to the main body 210 after the explosion-proof valve assembly 10 is subjected to force. Specifically, when the battery in the battery pack 20 causes the pressure in the cavity 440 to reach a preset pressure due to thermal control, the explosion-proof valve assembly 10 can detach from the tray 400, where the preset pressure is 20 kPa to 30 kPa.
[0075] In some embodiments, to ensure a more stable and reliable upper limit engagement between the abutment portion 230 and the tray 400 in the direction from the second side 430 to the first side 420, the side of the abutment portion 230 facing the limiting surface 431 can be configured as a plane. Correspondingly, the portion of the limiting surface 431 opposite to the abutment portion 230 is also planar, thus increasing the contact area between the abutment portion 230 and the limiting surface 431, thereby improving the reliability of the connection between the abutment portion 230 and the limiting surface 431.
[0076] In addition, in order to further increase the contact area between the supporting part 230 and the limiting surface 431, a number of groove structures can be provided on the side of the supporting part 230 facing the limiting surface 431, and a number of protrusion structures can be provided on the limiting surface 431. The protrusion structures can be embedded in the groove structures, thereby making the connection between the supporting part 230 and the tray 400 more reliable.
[0077] In some embodiments, referring to FIG5, the direction perpendicular to the direction from the connecting portion 220 to the supporting portion 230 and perpendicular to the axial direction of the vent hole 410 is the width direction of the supporting portion 230, i.e., the Z direction in FIG5. The supporting portion 230 has a width dimension in the direction perpendicular to the direction from the connecting portion 220 to the supporting portion 230. The width of the supporting portion 230 is Wb, and Wb and Y satisfy the following relationship: Wb = 2Y ~ 3Y. That is, the width dimension of the supporting portion 230 is two to three times the sum of the lengths of the supporting portion 230 and the connecting portion 220. In this way, while ensuring that the supporting portion 230 and the limiting surface 431 have a certain contact area so that the supporting portion 230 and the tray 400 are reliably connected, the load between the supporting portion 230 and the tray 400 is not too large. When the pressure in the cavity 440 reaches the preset pressure, the explosion-proof valve assembly 10 can be detached from the tray 400.
[0078] In some embodiments, referring to FIG4, the number of claws 200 of this disclosure can be set to multiple, and the multiple claws 200 can be distributed along the circumference of the valve body 100. The abutment portion 230 of the multiple claws 200 are all in upper limit engagement with the limiting surface 431 of the valve body 100 in the direction from the second side 430 to the first side 420. This can enhance the reliability of the upper limit engagement between the explosion-proof valve assembly 10 and the tray 400 in the direction from the second side 430 to the first side 420, and prevent the explosion-proof valve assembly 10 from easily separating from the tray 400.
[0079] Multiple claws 200 are distributed circumferentially along the cover plate, allowing the explosion-proof valve assembly 10 to be evenly matched with the tray 400 at multiple circumferential locations. This prevents the explosion-proof valve assembly 10 from being misaligned when positioned at the exhaust port 410, resulting in better sealing of the exhaust port 410. When the air pressure inside the tray 400 increases, causing gas to act on the explosion-proof valve assembly 10, the multiple claws 200 can be evenly stressed and deformed. This allows the multiple claws 200 to deform synchronously, enabling the explosion-proof valve assembly 10 to stably detach from the tray 400 when the air pressure inside the cavity 440 reaches a preset pressure.
[0080] In some embodiments, referring to FIG4, the number of the claws 200 of this disclosure can be set to three, and the three claws 200 are evenly spaced along the circumference of the valve body 100, such that the included angle between the centers of adjacent claws 200 is 120°. The number of claws 200 can also be set to two, and the two claws 200 can be symmetrically distributed along the center of the exhaust port 410, such that the included angle between the centers of adjacent claws 200 is 90°.
[0081] Of course, the number of claws 200 can also be selected according to the actual size of the tray 400 and the vent 410. Specifically, when the inner diameter of the vent 410 is larger, the outer diameter of the valve body 100 is also larger, and the number of claws 200 can be set to be more, so that there are more parts that abut against the limit surface 431, thereby making the connection between the explosion-proof valve assembly 10 and the tray 400 more stable and reliable.
[0082] In some embodiments, the length Y of the chuck 200 can be set to 1.5mm-3mm, thereby improving the structural stability of the chuck 200. Specifically, the length Y of the chuck 200 can be set to 2mm, and correspondingly, Wb is 5mm and L is 40mm.
[0083] In some embodiments, referring to FIG4, when there are multiple claws 200 of this disclosure, there are correspondingly multiple main body portions 210. The outer wall of the main body portion 210 facing the connecting portion 220, that is, the outer wall of the main body portion 210 connected to the connecting portion 220, can be set as an arc surface, thereby improving the structural strength of the main body portion 210 and avoiding stress concentration problems in the main body portion 210. The outer walls of multiple main body portions 210 facing the connecting portion 220 are all located on a preset arc, the circumference of the preset arc is L, and the sum of the widths Wb of multiple abutment portions 230 is S. S and L satisfy the following relationship: S = 0.34L ~ 0.47L. This can prevent multiple claws 200 from engaging too tightly with the tray 400 when there are multiple claws 200, which would make it difficult for the explosion-proof valve assembly 10 to separate from the tray 400.
[0084] In some embodiments, as shown in Figures 5 and 6, the main body 210 has a cantilever hole 213. The main body 210 includes a connecting beam 215 and two cantilever beams 214. The two cantilever beams 214 are located on both sides of the cantilever hole 213 and are distributed along a preset arc. The connecting beam 215 is located on the side of the cantilever hole 213 away from the valve body 100. One end of each of the two cantilever beams 214 is connected to the valve body 100, and the other end of each of the two cantilever beams 214 is connected to the connecting beam 215.
[0085] Specifically, cantilever beam 214 is the portion of the main body 210 in Figure 6 located below the dashed line P and above the dashed line Q, and connecting beam 215 is the portion of the main body 210 in Figures 5 and 6 located above the dashed line P. The cantilever hole 213 divides the main body 210 into two cantilever beams 214, which are respectively connected to the valve body 100. This makes the main body 210 more susceptible to deformation or fracture under external force, allowing it to separate from the mounting plate 450 under relatively low pressure. This also allows the connecting portion 220 and the supporting portion 230 connected to the main body 210 to separate relatively easily from the mounting plate 450. This allows the claw 200 to disengage from the vent hole 410, and the gas inside the battery pack 20 to be discharged through the vent hole 410.
[0086] By connecting the two cantilever beams 214 with the connecting beam 215, when any one of the cantilever beams 214 is deformed by external force, part of the force can be transmitted to the other cantilever beam 214 through the connecting beam 215. In this way, the two cantilever beams 214 can be deformed by external force simultaneously and separate from the vent hole 410 of the mounting plate 450, making it easier for the claw 200 to be disengaged from the mounting plate 450.
[0087] In some embodiments, referring to FIG5, the cantilever hole 213 of the main body 210 of this disclosure can be configured as a through hole penetrating the main body 210, and the cantilever hole 213 extends to the valve body 100 on the side opposite to the connecting beam 215. In this way, the main body 210 is connected to the valve body 100 only through two cantilever beams 214, which can avoid the connection between the main body 100 and the valve body 100 being too stable, which would prevent the pawl 200 from being unable to disengage from the vent hole 410 of the mounting plate 450 when subjected to external force.
[0088] Specifically, the first end 211 of the main body 210 is the end where the two cantilever beams 214 are connected to the valve body 100, and the second end 212 of the main body 210 is located on the connecting beam 215, specifically on the side of the connecting beam 215 away from the cantilever beams 214.
[0089] In some embodiments, referring to FIG5, the connecting portion 220 of this disclosure may be provided on the connecting beam 215 of the main body portion 210, so that the connection between the connecting portion 220 and the main body portion 210 can be more stable and reliable. Specifically, it should be understood that if the connecting portion 220 is connected to the cantilever beam 214 of the main body portion 210, then part of the connecting portion 220 will be opposite to the cantilever hole 213, resulting in part of the connecting portion 220 not being connected to the main body portion 210 and being suspended, thereby resulting in poor connection stability between the connecting portion 220 and the main body portion 210.
[0090] Therefore, by providing the connecting part 220 on the connecting beam 215, the contact area between the connecting part 220 and the main body 210 can be increased, thereby making the connection reliability between the connecting part 220 and the main body 210 better.
[0091] In some embodiments, the thickness of the cantilever beam 214 is F in the direction from the connecting portion 220 to the supporting portion 230, and the thickness of the valve body 100 is T in the axial direction of the exhaust port 410, wherein the ratio of F to T is not less than 1. It should be understood that the smaller the thickness F of the cantilever beam 214, the thinner the cantilever beam 214, and the lower its structural strength. Consequently, the pawl 200 is more easily disengaged from the exhaust port 410 of the mounting plate 450 under external force. Conversely, it should also be understood that the larger the thickness F of the cantilever beam 214, the thicker the cantilever beam 214, and the higher its structural strength. Consequently, the pawl 200 is less likely to break during the process of passing through the exhaust port 410.
[0092] In this disclosure, by setting the ratio of F to T to be no less than 1 and no more than 1.1, the structure of the cantilever beam 214 can remain stable during the process of passing the claw 200 through the vent hole 410 and installing it on the mounting plate 450, preventing the cantilever beam 214 from breaking, thereby ensuring the structural stability of the claw 200. Furthermore, it also makes it easier for the claw 200 to detach from the vent hole 410 of the mounting plate 450 under external force.
[0093] In some embodiments, referring to FIG5, the width of the cantilever beam 214 is b in the direction perpendicular to the direction from the connecting portion 220 to the supporting portion 230 and perpendicular to the axial direction of the vent hole 410, i.e., the Z direction in FIG5, and the ratio of b to T is not less than 1.
[0094] It should be understood that the smaller the width b of the cantilever beam 214, the narrower the cantilever beam 214, and the lower its structural strength. Consequently, the claw 200 is more likely to detach from the vent hole 410 of the mounting plate 450 under external force. Conversely, it should also be understood that the larger the width b of the cantilever beam 214, the wider the cantilever beam 214, and the higher its structural strength. Consequently, the claw 200 is less likely to break during the process of passing through the vent hole 410.
[0095] In this disclosure, by setting the ratio of b to T to be no less than 1 and no more than 1.5, the structure of the cantilever beam 214 can remain stable during the process of passing the claw 200 through the vent hole 410 and installing it onto the mounting plate 450, preventing the cantilever beam 214 from breaking, thereby ensuring the structural stability of the claw 200. Furthermore, it also makes it easier for the claw 200 to detach from the vent hole 410 of the mounting plate 450 under external force.
[0096] In some embodiments, referring to FIG6, in the direction from the first end 211 to the second end 212 of the main body 210, i.e., the X direction in FIG6, the length of the cantilever beam 214 is H, and the ratio of H to the thickness T of the valve body 100 is not less than 8. It should be understood that the longer the length H of the cantilever beam 214, the greater the distance between the connecting beam 215 and the valve body 100, and correspondingly, the greater the distance between the connecting portion 220 and the abutment portion 230 provided on the connecting beam 215 and the valve body 100. In this way, the pawl 200 is more likely to detach from the vent hole 410 of the mounting plate 450 under the action of external force. This disclosure makes the length of the cantilever beam 214 longer by setting the ratio of H to T to not less than 8, thereby making it easier for the pawl 200 to detach from the vent hole 410 of the mounting plate 450 under the action of external force.
[0097] In some embodiments, the distance between the two cantilever beams 214 is D, and the ratio of D to T is not less than 2, which allows for a larger distance between the two cantilever beams 214. It should be understood that a larger distance between the two cantilever beams 214 makes the two cantilever beams 214 more independent, and allows the main body 210 to be wider in the direction perpendicular to the direction from the connecting part 220 to the supporting part 230 and perpendicular to the axial direction of the vent hole 410. This results in higher structural strength of the main body 210, and consequently, makes the claw 200 less prone to breakage during the process of passing the claw 200 through the vent hole 410.
[0098] In some embodiments, referring to FIG4, to further improve the stability and reliability of the explosion-proof valve assembly 10 when it is disposed within the vent 410 of the tray 400, the explosion-proof valve assembly 10 may also include a limiting baffle 300. One end of the limiting baffle 300 is connected to the valve body 100, and the limiting baffle 300 passes through the vent 410, abutting against the inner wall of the vent 410. In this way, the limiting baffle 300 can engage with the valve body 100 in a radially limited manner within the vent 410, thereby preventing the explosion-proof valve assembly 10 from wobbling relative to the valve body 100 in the radial direction of the vent 410.
[0099] Specifically, the outer wall of the limiting baffle 300 that abuts against the inner wall of the exhaust port 410 can be set as an arc surface, so that the outer wall of the limiting baffle 300 and the inner wall of the exhaust port 410 are fully fitted together, thereby enhancing the limiting stability of the limiting baffle 300 and the valve body 100.
[0100] In some embodiments, referring to FIG4, the number of limiting baffles 300 in this disclosure can be set to multiple, and the multiple limiting baffles 300 can be distributed circumferentially along the valve body 100. The multiple limiting baffles 300 can all be matched with the valve body 100 in the radial upper limit of the exhaust port 410, thereby further preventing the explosion-proof valve assembly 10 from shaking relative to the valve body 100 in the radial direction of the exhaust port 410.
[0101] In addition, multiple limiting barriers 300 abut against different parts of the inner wall of the vent 410, so that the center of the explosion-proof valve assembly 10 can be aligned with the center of the vent 410, thereby enabling the explosion-proof valve assembly 10 to better block the vent 410 of the tray 400.
[0102] The number of limiting baffles 300 can correspond to the number of jaws 200, such that at least one limiting baffle 300 is distributed between adjacent jaws 200. Specifically, when there are three jaws 200, the number of limiting baffles 300 can also be set to three, and the three limiting baffles 300 and the three jaws 200 can be alternately arranged along the circumference of the valve body 100.
[0103] In some embodiments, referring to FIG4, in order to make the structure of the multiple limiting walls 300 more stable, the explosion-proof valve assembly 10 of this disclosure may also be provided with a connecting block 310. The multiple limiting walls 300 can be connected through the connecting block 310, so that the multiple limiting walls 300 can support each other, thereby making the connection between the multiple limiting walls 300 and the valve body 100 more stable and reliable.
[0104] Specifically, the orthographic projection of the connecting block 310 onto the valve body 100 is located in the middle of the valve body 100. In this way, multiple limiting baffles 300 can be arranged around the connecting block 310, so that the spacing between the multiple limiting baffles 300 and the connecting block 310 is consistent, thereby making the structure of the connection between the limiting baffles 300 and the connecting block 310 more balanced and stable.
[0105] In some embodiments, referring to Figures 7 and 8, the vent 410 of the tray 400 in this disclosure may include a first segment 411 and a second segment 412. The first segment 411 and the second segment 412 are connected, with the first segment 411 adjacent to the valve body 100, and the second segment 412 located on the side of the first segment 411 facing away from the valve body 100 and connected to the first segment 411. In the direction from the first segment 411 to the second segment 412, the inner diameter of the first segment 411 gradually decreases, such that the inner diameter of the second segment 412 matches the minimum inner diameter of the first segment 411. In this way, the inner wall of the vent hole 410 can be chamfered. When the explosion-proof valve assembly 10 is assembled into the vent hole 410, the first hole section 411 can guide the claw 200, making it easier for the claw 200 to bend away from the inner wall of the vent hole 410. This allows the holding part 230 to move to the second side 430 of the tray 400 and abut against the limiting surface 431, reducing the process difficulty of assembling the explosion-proof valve assembly 10 of this disclosure onto the tray 400.
[0106] Furthermore, referring to Figure 3, the abutment portion 230 also has a thickness dimension in the direction from the abutment portion 230 to the connecting portion 220. The thickness of the abutment portion 230 decreases in the direction from the first end 211 to the second end 212 of the main body portion 210, thereby allowing a guide surface 231 to be formed on the side of the abutment portion 230 away from the connecting portion 220. When the claw 200 is installed on the vent hole 410 of the mounting plate 450, the guide surface 231 can slide in contact with the inner wall of the first hole segment 411, making it easier for the claw 200 to pass through the vent hole 410. Specifically, the angle between the guide surface 231 and the direction from the first end 211 to the second end 212 of the main body portion 210 can be set to 50°-70°.
[0107] In some embodiments, referring to FIG1, the valve body 100 of this disclosure may also be provided with a vent hole 110, which extends through the valve body 100 along its thickness direction. It should be understood that when gas is generated by the battery pack 20 of the explosion-proof valve assembly 10 of this disclosure, some of the gas can be discharged through the vent hole 110 of the valve body 100.
[0108] The explosion-proof valve assembly 10 disclosed herein may also include a breathable membrane 120, which may be disposed on the vent 110. The breathable membrane 120 may be a one-way membrane, so that the gas inside the battery pack 20 can pass through the breathable membrane 120 to the outside of the battery pack 20, while the gas outside the battery pack 20 cannot pass through the breathable membrane 120 to enter the battery pack 20.
[0109] In some embodiments, referring to FIG1, the explosion-proof valve assembly 10 of this disclosure may further include an upper cover 600, which is detachably connected to the valve body 100. The upper cover 600 covers the valve body 100 and can cover the breathable membrane 120. The upper cover 600 can protect the breathable membrane 120. Specifically, the upper cover 600 and the valve body 100 can be detachably connected by a snap-fit mechanism.
[0110] In some embodiments, referring to FIG3, the battery pack 20 of this disclosure may also include a sealing ring 500, which can be fitted onto the cover plate and is located between the cover plate and the tray 400, thereby enhancing the sealing performance of the explosion-proof valve assembly 10 in blocking the exhaust port 410.
[0111] In some embodiments, the claw 200 of this disclosure may be made of a polymer material, thereby making the claw 200 more susceptible to deformation under force and separation from the vent hole 410 of the mounting plate 450.
[0112] Specifically, the claw 200 can be made of fiber-reinforced resin. Furthermore, the valve body 100 and the top cover 600 can also be made of polymer materials, specifically fiber-reinforced resin.
[0113] As shown in Figure 10, this disclosure also proposes an electrical device 30, including the battery pack 20 mentioned above.
[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.
Claims
1. An explosion-proof valve assembly (10), characterized in that, include: Mounting plate (450) includes vent hole (410) and limiting surface (431) located on one side of vent hole (410); The valve body (100) is opposite to the exhaust port (410) and is located on the side of the mounting plate (450) facing away from the limiting surface (431); The claw (200) includes a main body (210), a connecting part (220), and a supporting part (230). The first end (211) of the main body (210) is connected to the valve body (100), and the second end (212) of the main body (210) passes through the exhaust hole (410). The connecting part (220) is connected to the main body (210) and is located between the first end (211) and the second end (212). The supporting part (230) is connected to the side of the connecting part (220) away from the main body (210). The connecting part (220) is opposite to the exhaust hole (410), and the supporting part (230) is opposite to the limiting surface (431). In the direction from the connecting part (220) to the supporting part (230), the length of the supporting part (230) is a, and the sum of the lengths of the connecting part (220) and the supporting part (230) is Y. a and Y satisfy the following relationship: a = 0.25Y - 0.5Y.
2. The explosion-proof valve assembly (10) according to claim 1, characterized in that, The side of the supporting part (230) facing the limiting surface (431) is a plane.
3. The explosion-proof valve assembly (10) according to claim 1, characterized in that, In a direction perpendicular to the direction from the connecting portion (220) to the supporting portion (230) and perpendicular to the axial direction of the vent hole (410), the width of the supporting portion (230) is Wb, and Wb satisfies the following relationship with Y: Wb = 2Y - 3Y.
4. The explosion-proof valve assembly (10) according to claim 3, characterized in that, The number of the claws (200) is multiple, and the multiple claws (200) are distributed circumferentially along the valve body (100).
5. The explosion-proof valve assembly (10) according to claim 4, characterized in that, The outer wall of the main body (210) facing the connecting part (220) is an arc surface. The outer walls of the main body (210) facing the connecting part (220) are all located on a preset arc. The circumference of the preset arc is L. The sum of the widths Wb of the multiple supporting parts (230) is S. S and L satisfy the following relationship: S = 0.34L ~ 0.47L.
6. The explosion-proof valve assembly (10) according to claim 5, characterized in that, Y is 1.5mm-3mm.
7. The explosion-proof valve assembly (10) according to claim 5, characterized in that, The main body (210) has a cantilever hole (213). The main body (210) includes a connecting beam (215) and two cantilever beams (214). The two cantilever beams (214) are located on both sides of the cantilever hole (213) and are distributed along the preset arc. The connecting beam (215) is located on the side of the cantilever hole (213) away from the valve body (100). One end of each of the two cantilever beams (214) is connected to the valve body (100), and the other end of each of the two cantilever beams (214) is connected to the connecting beam (215).
8. The explosion-proof valve assembly (10) according to claim 7, characterized in that, The cantilever hole (213) passes through the main body (210), and the cantilever hole (213) extends to the valve body (100) from the side opposite to the connecting beam (215).
9. The explosion-proof valve assembly (10) according to claim 8, characterized in that, The second end (212) of the main body (210) is located on the connecting beam (215), the end of the cantilever beam (214) connected to the valve body (100) is the first end (211) of the main body (210), and the connecting part (220) is provided on the connecting beam (215).
10. The explosion-proof valve assembly (10) according to claim 9, characterized in that, In the direction from the connecting part (220) to the supporting part (230), the thickness of the cantilever beam (214) is F, and in the axial direction of the exhaust hole (410), the thickness of the valve body (100) is T, and the ratio of F to T is not less than 1.
11. The explosion-proof valve assembly (10) according to claim 9, characterized in that, The width of the cantilever beam (214) is b in a direction perpendicular to the direction from the connecting part (220) to the supporting part (230) and perpendicular to the axial direction of the exhaust hole (410), and the thickness of the valve body (100) is T in the axial direction of the exhaust hole (410), and the ratio of b to T is not less than 1.
12. The explosion-proof valve assembly (10) according to claim 9, characterized in that, In the direction from the first end (211) to the second end (212) of the main body (210), the length of the cantilever beam (214) is H, and in the axial direction of the exhaust port (410), the thickness of the valve body (100) is T, and the ratio of H to T is not less than 8.
13. The explosion-proof valve assembly (10) according to claim 9, characterized in that, The distance between the two cantilever beams (214) is D, and the thickness of the valve body (100) is T in the axial direction of the exhaust port (410), with the ratio of D to T not less than 2.
14. The explosion-proof valve assembly (10) according to any one of claims 1-6, characterized in that, The explosion-proof valve assembly (10) further includes a limiting wall (300), which is connected to the valve body (100) and passes through the exhaust hole (410). The limiting wall (300) abuts against the wall surface of the mounting plate (450) located inside the exhaust hole (410).
15. The explosion-proof valve assembly (10) according to claim 14, characterized in that, The number of the limiting baffles (300) is multiple, and the multiple limiting baffles (300) and the multiple claws (200) are alternately arranged along the circumference of the valve body (100).
16. The explosion-proof valve assembly (10) according to claim 15, characterized in that, The explosion-proof valve assembly (10) also includes a connecting block (310), which is connected to a plurality of the limiting walls (300).
17. The explosion-proof valve assembly (10) according to claim 16, characterized in that, The orthographic projection of the connecting block (310) onto the valve body (100) is located at the middle part of the valve body (100).
18. The explosion-proof valve assembly (10) according to any one of claims 1-6, characterized in that, The explosion-proof valve assembly (10) further includes a breathable membrane (120), the valve body (100) has a vent hole (110) which extends through the valve body (100) along the thickness direction, and the breathable membrane (120) is disposed on the valve body (100) and covers the vent hole (110).
19. The explosion-proof valve assembly (10) according to claim 18, characterized in that, The explosion-proof valve assembly (10) further includes a cover (600), which is connected to the valve body (100) and covers the valve body (100).
20. The explosion-proof valve assembly (10) according to claim 1, characterized in that, The claw (200) is made of fiber-reinforced resin material.
21. A battery pack (20), characterized in that, The device includes a tray (400), a battery, and an explosion-proof valve assembly (10) as claimed in any one of claims 1-20, wherein the tray (400) includes the mounting plate (450), the tray (400) includes a cavity (440), the vent (410) communicates with the cavity (440), and the battery is disposed in the cavity (440).
22. The battery pack (20) according to claim 21, characterized in that, The exhaust port (410) includes a first section (411) and a second section (412), the first section (411) and the second section (412) are connected, and the first section (411) is adjacent to the valve body (100), and the second section (412) is located on the side of the first section (411) away from the valve body (100); In the direction from the first hole segment (411) to the second hole segment (412), the inner diameter of the first hole segment (411) gradually decreases.
23. An electrical appliance (30), characterized in that, Includes the battery pack (20) as described in claim 21 or 22.