Explosion-proof valve, battery pack, and electric device

Abstract

An explosion-proof valve, a battery pack, and an electric device. The explosion-proof valve comprises an explosion-proof valve body and at least one connection assembly. The connection assembly is connected to the explosion-proof valve body. The connection assembly comprises a support arm and a claw. The support arm is connected to the claw. The support arm has at least two support portions. In the circumferential direction of the explosion-proof valve, the two support portions are spaced apart. The problem of a reduction in the safety performance of the battery pack caused by difficulty in opening the explosion-proof valve can be solved.

Description

An explosion-proof valve, battery pack and electrical equipment

[0001] This disclosure claims priority to Chinese Patent Application No. 202411916947.7, filed on December 20, 2024, entitled “An Explosion-proof Valve, Battery Pack and Electrical Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of explosion-proof valve technology, and in particular to an explosion-proof valve, a battery pack, and electrical equipment. Background Technology

[0003] Batteries are power sources that provide power to tools, often referring to rechargeable batteries that power electric vehicles, electric trains, electric bicycles, and golf carts.

[0004] Current battery packs have explosion-proof valves installed on their casings. However, in related technologies, these valves are difficult to open, which can reduce the safety performance of the battery pack. Summary of the Invention

[0005] This disclosure provides an explosion-proof valve, a battery pack, and an electrical device to solve the problem that difficulty in opening the explosion-proof valve leads to a reduction in the safety performance of the battery pack.

[0006] In a first aspect, embodiments of this disclosure provide an explosion-proof valve, comprising:

[0007] Explosion-proof valve body;

[0008] At least one connecting component is connected to the explosion-proof valve body; the connecting component includes a support arm and a locking claw.

[0009] The support arm is connected to the claw; the support arm has at least two support parts, which are spaced apart along the circumference of the explosion-proof valve.

[0010] In one embodiment, one end of the support arm is connected to the explosion-proof valve body, and the end of the support arm away from the explosion-proof valve body is connected to the pawl.

[0011] In one embodiment, at least two supports are connected to the claws at the ends furthest from the explosion-proof valve body.

[0012] In one embodiment, the explosion-proof valve body has a vent for connecting opposite sides in the thickness direction of the explosion-proof valve body.

[0013] The explosion-proof valve also includes a breathable membrane covering the vent.

[0014] In one embodiment, the pawl is connected to the side of the support arm opposite to the center of symmetry of the vent.

[0015] In one embodiment, the connecting assembly includes a support base disposed on the side of the support arm near the explosion-proof valve body and connecting the support arm and the explosion-proof valve body.

[0016] In one embodiment, the connection between the support base and the support arm has a chamfer.

[0017] In one embodiment, multiple connecting components are provided, spaced apart along the circumference of the explosion-proof valve.

[0018] In one embodiment, the claw has an abutment surface, a portion of which is used to abut the battery casing of the battery pack.

[0019] In one implementation, it further includes:

[0020] At least one reinforcing member is provided on the explosion-proof valve body and extends along the height direction of the explosion-proof valve.

[0021] Reinforcing members and connecting components are spaced apart along the circumference of the explosion-proof valve.

[0022] In one implementation, multiple reinforcement components are provided;

[0023] Along the circumference of the explosion-proof valve, multiple reinforcing components are connected at intervals to the body of the explosion-proof valve.

[0024] In one embodiment, the support portion has a first thickness t along the thickness direction of the support arm, the first thickness t satisfying: 2.0mm≤t≤2.5mm.

[0025] In one embodiment, the support portion has a first width b along the circumference of the explosion-proof valve, the first width b satisfying: 2.0mm≤b≤3.75mm.

[0026] In one embodiment, the support portion has a first thickness t along the thickness direction of the support arm;

[0027] Along the circumference of the explosion-proof valve, the support portion has a first width b;

[0028] The first thickness t and the first width b satisfy the following condition: 1t≤b≤1.5t.

[0029] In one embodiment, the support portion has a first thickness t along the thickness direction of the support arm;

[0030] Along the circumference of the explosion-proof valve, there is a first distance B between the two support parts, and the first distance B satisfies: B≥2t.

[0031] In one embodiment, along the circumference of the explosion-proof valve, there is a first gap B between the two supports, the first gap B satisfying: 4mm≤B≤5mm.

[0032] In one embodiment, the support portion has a first height H along the height direction of the explosion-proof valve, and the first height H satisfies: 16mm≤H≤20mm.

[0033] In one embodiment, the support portion has a first thickness t in the thickness direction of the support arm;

[0034] Along the height direction of the explosion-proof valve, the support part has a first height H, which satisfies: H≥8t.

[0035] In one implementation, the radius of the chamfer is 0.5mm-1.0mm.

[0036] In one implementation, it further includes:

[0037] A sealing ring is located on the body of the explosion-proof valve, and the sealing ring is arranged around the outer periphery of some connecting components.

[0038] In one embodiment, part of the support arm is located inside the sealing ring.

[0039] In one embodiment, the pawl is located on the side of the sealing ring away from the explosion-proof valve body.

[0040] In one embodiment, the claw has a guide surface, and the extension direction of the guide surface and the extension direction of the support are set at an angle α, wherein the angle α satisfies: 50°≤α≤70°.

[0041] In one implementation, it further includes:

[0042] The top cover is located on the side of the explosion-proof valve body away from the support arm, and the top cover is located over the vent.

[0043] Secondly, this disclosure provides a battery pack, including a battery housing and an explosion-proof valve, wherein the explosion-proof valve is disposed in the battery housing;

[0044] The battery casing has a through hole through which the connection assembly of the explosion-proof valve passes and is connected to the battery casing.

[0045] Thirdly, this disclosure provides an electrical device, including an electrical appliance and a battery pack, the battery pack being used to provide electrical energy to the electrical appliance.

[0046] The explosion-proof valve disclosed herein includes: an explosion-proof valve body and at least one connecting assembly. The connecting assembly is connected to the explosion-proof valve body; the connecting assembly includes a support arm and a clamping claw, the support arm being connected to the clamping claw, and the support arm having at least two support portions spaced apart along the circumference of the explosion-proof valve.

[0047] In this explosion-proof valve structure, the connecting assembly is connected to the valve body, allowing the valve to be connected to the battery pack. A support arm extends towards the side closest to the battery pack, and a claw connects to the battery casing. The connection between the support arm and the battery pack improves the stability of the connecting assembly. Two support sections are spaced apart along the circumference of the explosion-proof valve. This spacing reduces the weight of the support arm, thus reducing the overall weight of the explosion-proof valve. Furthermore, the two support sections reduce the difficulty of breaking the connecting assembly from the valve body, making it easier for the valve body to detach from the connecting assembly. This reduces the difficulty of detaching the explosion-proof valve from the battery pack, thereby improving the safety performance of the battery pack. Attached Figure Description

[0048] Figure 1 is a schematic diagram of the main structure of the explosion-proof valve provided in this disclosure;

[0049] Figure 2 is a schematic diagram of the main structure of the connection component provided in this disclosure;

[0050] Figure 3 is a schematic diagram of the main structure of the connection component provided in this disclosure.

[0051] Explanation of reference numerals in the attached drawings: 100-Explosion-proof valve body; 200-Connecting assembly; 201-Support arm; 2011-Support part; 202-Claw; 2021-Abutting surface; 2022-Guide surface; 203-Support base; 204-Chamfer; 300-Reinforcing part; 400-Sealing ring; 500-Top cover; t-First thickness; b-First width; B-First spacing; H-First height; α-Included angle. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0053] In the explosion-proof valve provided in the embodiments of this disclosure, the connecting assembly is connected to the explosion-proof valve body, allowing the explosion-proof valve to be connected to the battery pack via the connecting assembly. The support arm extends towards the side closer to the battery pack, and the claw is used to connect with the battery casing of the battery pack. The connection between the support arm and the battery pack can improve the stability of the connecting assembly. Two support parts are spaced apart along the circumference of the explosion-proof valve. The spacing between the two support parts can reduce the weight of the support arm, thereby reducing the total weight of the explosion-proof valve. Furthermore, the arrangement of the two support parts can reduce the difficulty of breakage between the connecting assembly and the explosion-proof valve body, making it easier for the explosion-proof valve body to detach from the connecting assembly, thus reducing the difficulty of detaching the explosion-proof valve from the battery pack and improving the safety performance of the battery pack.

[0054] As shown in Figure 1, the explosion-proof valve provided in the embodiments of this disclosure includes: an explosion-proof valve body 100 and at least one connecting assembly 200. The connecting assembly 200 is connected to the explosion-proof valve body 100; the connecting assembly 200 includes a support arm 201 and a claw 202, the support arm 201 is connected to the claw 202, and the support arm 201 has at least two support portions 2011, which are spaced apart along the circumference of the explosion-proof valve.

[0055] It is understandable that two support parts 2011 are spaced apart along the circumference of the explosion-proof valve. The gap between the two support parts 2011 can form a through hole. The through hole can reduce the weight of the support arm 201, thereby making the explosion-proof valve lighter.

[0056] It should be noted that the explosion-proof valve body 100 has a variety of different configuration shapes. The configuration shapes of the explosion-proof valve body 100 will be illustrated below.

[0057] In one embodiment, the explosion-proof valve body 100 is circular in shape.

[0058] Understandably, the circular design of the explosion-proof valve body 100 can reduce the manufacturing difficulty of the explosion-proof valve.

[0059] In another embodiment, the explosion-proof valve body 100 is square in shape.

[0060] Understandably, the square explosion-proof valve body 100 has the advantage of easy installation, which can reduce the installation difficulty between the explosion-proof valve and the battery pack.

[0061] It is understandable that the shape of the explosion-proof valve body 100 is not limited and can be selected according to actual usage requirements.

[0062] The support arm 201 provided in the embodiments of this disclosure is connected at one end to the explosion-proof valve body 100, and at the other end of the support arm 201 away from the explosion-proof valve body 100 is connected to the claw 202.

[0063] It is understandable that the claw 202 is connected to the explosion-proof valve body 100 through the support arm 201, which can reduce the connection difficulty between the claw 202, the support arm 201 and the explosion-proof valve body 100, thereby reducing the processing difficulty of the explosion-proof valve.

[0064] The embodiments of this disclosure provide that at least two support portions 2011 are connected to the claw 202 at the ends away from the explosion-proof valve body 100.

[0065] It is understandable that at least two support parts 2011 are connected to the claw 202 at the ends away from the explosion-proof valve body 100. This can improve the connection strength between the at least two support parts 2011 and the claw 202, thereby extending the service life of the connection assembly 200 and improving the operational stability of the explosion-proof valve. This will improve the safety performance of the battery pack when the explosion-proof valve is installed in the battery pack.

[0066] The explosion-proof valve body 100 provided in the embodiments of this disclosure has a vent for connecting opposite sides of the explosion-proof valve body 100 in the thickness direction.

[0067] It should be noted that, on the two opposite sides of the explosion-proof valve body in the thickness direction of 100, one side is used to connect to the battery pack, and the other side is used to connect to the external environment.

[0068] The explosion-proof valve provided in the embodiments of this disclosure further includes: a breathable membrane covering the vent.

[0069] Understandably, the breathable membrane allows for gas exchange between the battery pack and the external environment through the vents and the membrane, reducing the risk of increased internal pressure and thus improving the safety performance of the battery pack when the explosion-proof valve is installed.

[0070] It should be noted that the breathable membrane can be waterproof. A waterproof breathable membrane can reduce the amount of water from the external environment entering the battery pack through the vents and the membrane, thereby improving the safety performance of the battery pack.

[0071] The claw 202 provided in the embodiments of this disclosure is connected to the support arm 201 on the side opposite to the symmetrical center of the vent.

[0072] Understandably, the claw 202 is connected to the side of the support arm 201 opposite to the symmetrical center of the vent. This reduces the obstruction of the vent by the claw 202, increasing the convection area between the vent and the inside of the battery pack. This reduces the increase in internal air pressure within the battery pack, thereby improving the safety performance of the battery pack when the explosion-proof valve is installed. Furthermore, connecting the claw 202 to the side of the support arm 201 opposite to the symmetrical center of the vent reduces the difficulty of connecting the claw 202 to the battery pack, thus improving the installation efficiency between the explosion-proof valve and the battery pack.

[0073] The connection assembly 200 provided in the embodiments of this disclosure includes a support base 203, which is disposed on the side of the support arm 201 near the explosion-proof valve body 100 and connects the support arm 201 and the explosion-proof valve body 100.

[0074] Understandably, the support base 203 can improve the connection strength between the connecting component 200 and the explosion-proof valve body 100. The support base 203 connects the support arm 201 and the explosion-proof valve body 100, which can improve the connection strength of the explosion-proof valve. Furthermore, the explosion-proof valve body 100 and the connecting component 200 can be processed separately, thereby reducing the processing difficulty of the explosion-proof valve and thus reducing the processing cost of the explosion-proof valve.

[0075] The connection between the support base 203 and the support arm 201 provided in the embodiments of this disclosure has a chamfer 204.

[0076] Understandably, the chamfer 204 reduces stress concentration at the connection between the support base 203 and the support arm 201, thereby reducing the risk of breakage of the support arm 201 relative to the support base 203 during the installation of the explosion-proof valve into the battery pack, and thus improving the service life of the explosion-proof valve.

[0077] The embodiments of this disclosure provide multiple connecting components 200, which are spaced apart along the circumference of the explosion-proof valve.

[0078] Understandably, increasing the number of connection components 200 can improve the connection strength between the explosion-proof valve and the battery pack, thereby improving the connection stability between the explosion-proof valve and the battery pack.

[0079] It should be noted that the connection component 200 has a variety of different configuration quantities, and the configuration quantities of the connection component 200 will be illustrated below.

[0080] In one embodiment, three connecting components 200 are provided, and the three connecting components 200 are spaced apart circumferentially along the explosion-proof valve.

[0081] Understandably, setting up three connection components 200 can improve the connection strength between the explosion-proof valve and the battery pack.

[0082] In another embodiment, four connection components 200 are provided, and the four connection components 200 are spaced apart circumferentially along the explosion-proof valve.

[0083] Understandably, setting up four connection components 200 can improve the connection strength between the explosion-proof valve and the battery pack.

[0084] Understandably, there is no limit to the number of connection components 200 that can be set, and they can be selected according to actual usage needs.

[0085] As shown in Figures 2 and 3, the claw 202 provided in the embodiments of this disclosure has an abutment surface 2021, and part of the abutment surface 2021 is used to abut the battery casing of the battery pack.

[0086] Understandably, part of the contact surface 2021 is used to contact the battery housing of the battery pack, thereby allowing the explosion-proof valve to be installed on the battery housing of the battery pack, thus reducing the difficulty of installation between the explosion-proof valve and the battery pack.

[0087] The explosion-proof valve provided in the embodiments of this disclosure further includes at least one reinforcing member 300, which is disposed on the explosion-proof valve body 100 and extends along the height direction of the explosion-proof valve. The reinforcing member 300 and the connecting component 200 are spaced apart along the circumference of the explosion-proof valve.

[0088] Understandably, the reinforcement component 300 reduces the offset of the explosion-proof valve relative to the battery pack, thereby improving the connection strength between the explosion-proof valve and the battery pack. The spacing between the reinforcement component 300 and the connecting component 200 along the circumference of the explosion-proof valve reduces interference from the reinforcement component 300 to the connecting component 200, enabling the explosion-proof valve to open under low-pressure conditions.

[0089] Among them, reducing the interference of the reinforcement 300 to the connection component 200 refers to the increase in the strength of the connection component 200 caused by the direct connection between the reinforcement 300 and the connection component 200.

[0090] It should be noted that multiple reinforcement components 300 are provided, and multiple reinforcement components 300 are connected to the explosion-proof valve body 100 at intervals along the circumference of the explosion-proof valve.

[0091] Understandably, increasing the number of reinforcement components 300 can limit the offset between the explosion-proof valve body 100 and the battery pack from multiple positions, thereby reducing the offset of the explosion-proof valve relative to the battery pack and improving the connection stability between the explosion-proof valve and the battery pack.

[0092] It should be noted that there are multiple settings for firmware 300, and examples of the number of settings for firmware 300 will be given below.

[0093] In one embodiment, three reinforcement members 300 are provided, and the three reinforcement members 300 are connected to the explosion-proof valve body 100 at intervals along the circumference of the explosion-proof valve.

[0094] Understandably, the three reinforcement components 300 can limit the offset between the explosion-proof valve body 100 and the battery pack from three different positions to improve the connection stability between the explosion-proof valve and the battery pack.

[0095] In another embodiment, four reinforcement members 300 are provided, and the four reinforcement members 300 are connected to the explosion-proof valve body 100 at intervals along the circumference of the explosion-proof valve.

[0096] Understandably, the four reinforcement components 300 can limit the offset between the explosion-proof valve body 100 and the battery pack from four different positions to improve the connection stability between the explosion-proof valve and the battery pack.

[0097] Understandably, there is no limit to the number of settings available for firmware 300; users can select the settings based on their actual needs.

[0098] In the explosion-proof valve provided in the embodiments of this disclosure, the support portion 2011 has a first thickness t along the thickness direction of the support arm 201, and the first thickness t satisfies: 2.0mm≤t≤2.5mm.

[0099] Understandably, the first thickness t satisfies: 2.0mm ≤ t ≤ 2.5mm. This allows for a reduction in the space occupied by the support 2011 and the explosion-proof valve body 100 while ensuring the strength of the support 2011 itself. This reduces the space occupied and weight of the explosion-proof valve, thereby achieving a lighter battery pack. Furthermore, it reduces the installation difficulty between the explosion-proof valve and the battery pack, thus improving the installation efficiency of the battery pack.

[0100] In the explosion-proof valve provided in the embodiments of this disclosure, the support portion 2011 has a first width b along the circumferential direction of the explosion-proof valve, and the first width b satisfies: 2.0mm≤b≤3.75mm.

[0101] Understandably, the first width b satisfies: 2.0mm ≤ b ≤ 3.75mm. This allows for a reduction in the space occupied by the support 2011 and the explosion-proof valve body 100 while ensuring the strength of the support 2011 itself. This reduces the space occupied and weight of the explosion-proof valve, thereby achieving a lighter battery pack. Furthermore, it reduces the installation difficulty between the explosion-proof valve and the battery pack, thus improving the installation efficiency of the battery pack.

[0102] In the explosion-proof valve provided in the embodiments of this disclosure, the support portion 2011 has a first thickness t along the thickness direction of the support arm 201, and the support portion 2011 has a first width b along the circumferential direction of the explosion-proof valve. The first thickness t and the second width b satisfy the following condition: 1t≤b≤1.5t.

[0103] It is understandable that the first thickness t and the second width b satisfy the condition: 1t ≤ b ≤ 1.5t. This reduces the installation difficulty between the explosion-proof valve and the battery pack while ensuring the strength of the support part 2011, thereby improving the installation efficiency of the battery pack. Furthermore, it reduces the space occupied by the support part 2011, thus reducing the space occupied by the explosion-proof valve. This, in turn, reduces the space occupied by the battery pack when the explosion-proof valve is installed, thereby increasing the energy density of the battery pack.

[0104] In the explosion-proof valve provided in the embodiments of this disclosure, a first distance B is provided between the two support portions 2011 along the circumference of the explosion-proof valve, and the first distance B satisfies: B≥2t.

[0105] It is understandable that the first spacing B satisfies: B≥2t, which can reduce the weight of the support arm 201, thereby reducing the weight of the explosion-proof valve. This, in turn, reduces the weight of the battery pack when the explosion-proof valve is installed in the battery pack, making the battery pack lighter.

[0106] In the explosion-proof valve provided in the embodiments of this disclosure, a first distance B is provided between the two support portions 2011 along the circumference of the explosion-proof valve, and the first distance B satisfies: 4mm≤B≤5mm.

[0107] Understandably, the first spacing B satisfies: 4mm ≤ B ≤ 5mm. This allows for the reduction of the weight and space occupied by the support arm 201 while ensuring the strength of the support part 2011. This, in turn, reduces the weight and space occupied by the explosion-proof valve, thus reducing the weight of the battery pack when the explosion-proof valve is installed, making the battery pack lighter and more portable. Furthermore, it reduces the difficulty of installing the explosion-proof valve and the battery pack, thereby improving the installation efficiency of the battery pack.

[0108] In the explosion-proof valve provided in the embodiments of this disclosure, the support portion 2011 has a first height H along the height direction of the explosion-proof valve, and the first height H satisfies: 16mm≤H≤20mm.

[0109] Understandably, the first height H satisfies: 16mm ≤ H ≤ 20mm, which allows the support 2011 to abut against the battery pack while passing through the through-hole. This also reduces the space occupied by the support 2011, thereby reducing the volume of the explosion-proof valve and the battery pack. Furthermore, it reduces the installation difficulty between the explosion-proof valve and the battery pack, thus improving the installation efficiency of the battery pack.

[0110] In the explosion-proof valve provided in the embodiments of this disclosure, the support part 2011 has a first height H along the height direction of the explosion-proof valve. The first height H satisfies: H≥8t, and the third direction Z and the first direction X are perpendicularly arranged.

[0111] Understandably, the first height H satisfies H≥8t, allowing the support 2011 to abut against the battery pack while passing through the through-hole. This also reduces the space occupied by the support 2011, thereby reducing the volume of the explosion-proof valve and the battery pack. Furthermore, it lowers the installation difficulty between the explosion-proof valve and the battery pack, thus improving the installation efficiency of the battery pack.

[0112] The chamfer 204 provided in the embodiments of this disclosure has a radius of 0.5mm-1.0mm.

[0113] Understandably, the radius of chamfer 204, ranging from 0.5mm to 1.0mm, reduces stress concentration at the connection between the support base 203 and the support arm 201, thereby increasing the connection strength between them and extending the service life of the explosion-proof valve. Furthermore, it reduces the difficulty of installing the explosion-proof valve and the battery pack, improving installation efficiency and ultimately enhancing the safety performance of the battery pack.

[0114] The explosion-proof valve provided in the embodiments of this disclosure further includes: a sealing ring 400, the sealing ring 400 being disposed on the explosion-proof valve body 100, and the sealing ring 400 being disposed around the outer periphery of a portion of the connecting assembly 200.

[0115] Understandably, when the explosion-proof valve is installed in the battery pack, the sealing ring 400 is used to seal the connection between the battery pack and the external environment, reducing the possibility of water from the external environment entering the battery pack through the gap between the explosion-proof valve and the battery pack, thereby providing safety protection for the battery pack. The sealing ring 400 is located around the outer periphery of part of the connecting component 200, which can improve the sealing effect between the explosion-proof valve and the battery pack, thus providing safety protection for the battery pack.

[0116] It should be noted that part of the support arm 201 is located inside the sealing ring 400.

[0117] Understandably, the fact that part of the support arm 201 is located inside the sealing ring 400 can improve the sealing effect between the explosion-proof valve and the battery pack, thereby providing safety protection for the battery pack.

[0118] The claw 202 provided in the embodiments of this disclosure has a guide surface 2022, and the extension direction of the guide surface 2022 and the extension direction of the support portion 2011 are set at an angle α, wherein the angle α satisfies: 50°≤α≤70°.

[0119] Understandably, the included angle α satisfies 50°≤α≤70°, which simplifies the installation between the explosion-proof valve and the battery pack, thereby improving the installation efficiency. It also reduces the installation difficulty between the clamp 202 and the battery pack, further enhancing the installation efficiency of both the explosion-proof valve and the battery pack.

[0120] It should be noted that the guide surface 2022 is a sloping surface, and the guide surface 2022 and the support arm 201 are flared out along the direction from the battery pack to the explosion-proof valve.

[0121] The explosion-proof valve provided in the embodiments of this disclosure further includes: an upper cover 500, which is disposed on the side of the explosion-proof valve body 100 away from the support arm 201, and the upper cover 500 covers a vent.

[0122] Understandably, the top cover 500 is used to reduce the area of ​​direct contact between the vent and the external environment, and can reduce the damage of the external environment to the vent membrane covering the vent, thereby improving the safety performance of the explosion-proof valve body 100 and providing safety protection for the battery pack.

[0123] Embodiments of this disclosure provide a battery pack, including a battery housing and an explosion-proof valve provided in the above embodiments. The explosion-proof valve is disposed in the battery housing. The battery housing has a through hole, and the connection assembly 200 of the explosion-proof valve passes through the through hole and is connected to the battery housing.

[0124] Understandably, the battery pack and the explosion-proof valve enclose an explosion-proof cavity, with part of the explosion-proof valve's connecting assembly 200 located within this cavity. When the internal pressure of the explosion-proof cavity increases, the pressure inside the cavity will compress the connection between the support portion 2011 and the support base 203 on the connecting assembly 200, causing the support portion 2011 to break relative to the support base 203. This causes the explosion-proof valve body 100 to detach from the battery pack, exposing the through-hole and allowing the pressure inside the explosion-proof cavity to leak to the external environment, thus providing safety protection for the battery pack.

[0125] Embodiments of this disclosure provide an electrical device, including an electrical appliance and a battery pack as described in any of the above embodiments, the battery pack being used to provide electrical energy to the electrical appliance.

[0126] The electrical equipment in this embodiment can be a vehicle, such as a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and a new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Accordingly, the electrical device can be the vehicle's drive mechanism or the vehicle's control system.

[0127] In addition, electrical equipment can also serve as other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships, and spacecraft. Among these, spacecraft can include airplanes, rockets, space shuttles, or spacecraft.

[0128] Since the electrical device in this embodiment includes the battery pack described in any of the above embodiments, the electrical device includes the battery pack structure and beneficial effects, which will not be described in detail here.

[0129] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0130] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0131] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The scope of the invention is limited only by the appended claims.

Claims

1. An explosion-proof valve, characterized in that, include: Explosion-proof valve body (100); At least one connecting component (200) is connected to the explosion-proof valve body (100); the connecting component (200) includes a support arm (201) and a claw (202); The support arm (201) is connected to the claw (202); the support arm (201) has at least two support portions (2011), which are spaced apart along the circumference of the explosion-proof valve.

2. The explosion-proof valve according to claim 1, characterized in that, One end of the support arm (201) is connected to the explosion-proof valve body (100), and the other end of the support arm (201) away from the explosion-proof valve body (100) is connected to the claw (202).

3. The explosion-proof valve according to claim 1, characterized in that, At least two of the support portions (2011) are connected to the claw (202) at the end away from the explosion-proof valve body (100).

4. The explosion-proof valve according to claim 1, characterized in that, The explosion-proof valve body (100) has a vent, which is used to connect the two opposite sides of the explosion-proof valve body (100) in the thickness direction; The explosion-proof valve further includes a breathable membrane covering the vent.

5. The explosion-proof valve according to claim 4, characterized in that, The claw (202) is connected to the side of the support arm (201) opposite to the center of symmetry of the vent.

6. An explosion-proof valve according to any one of claims 1, 3-5, characterized in that, The connecting assembly (200) includes a support base (203), which is disposed on the side of the support arm (201) near the explosion-proof valve body (100) and connects the support arm (201) and the explosion-proof valve body (100).

7. The explosion-proof valve according to claim 6, characterized in that, The connection between the support base (203) and the support arm (201) has a chamfer (204).

8. An explosion-proof valve according to any one of claims 1-5, characterized in that, Multiple connecting components (200) are provided, and the multiple connecting components (200) are spaced apart along the circumference of the explosion-proof valve.

9. An explosion-proof valve according to any one of claims 1-5, characterized in that, The claw (202) has an abutment surface (2021), part of which is used to abut the battery casing of the battery pack.

10. An explosion-proof valve according to any one of claims 1-5, characterized in that, Also includes: At least one reinforcement member (300) is provided on the explosion-proof valve body (100) and extends along the height direction of the explosion-proof valve; Along the circumference of the explosion-proof valve, the reinforcement (300) and the connecting assembly (200) are spaced apart.

11. An explosion-proof valve according to claim 10, characterized in that, The reinforcement component (300) is provided in multiple forms; Along the circumference of the explosion-proof valve, a plurality of the reinforcement members (300) are spaced apart and connected to the explosion-proof valve body (100).

12. An explosion-proof valve according to any one of claims 1-5, characterized in that, Along the thickness direction of the support arm (201), the support portion (2011) has a first thickness t, which satisfies: 2.0mm≤t≤2.5mm.

13. An explosion-proof valve according to any one of claims 1-5, characterized in that, Along the circumference of the explosion-proof valve, the support (2011) has a first width b, which satisfies: 2.0mm≤b≤3.75mm.

14. An explosion-proof valve according to any one of claims 1-5, characterized in that, Along the thickness direction of the support arm (201), the support portion (2011) has a first thickness t; Along the circumferential direction of the explosion-proof valve, the support portion (2011) has a first width b; The first thickness t and the first width b satisfy the following condition: 1t≤b≤1.5t.

15. An explosion-proof valve according to any one of claims 1-5, characterized in that, Along the thickness direction of the support arm (201), the support portion (2011) has a first thickness t; Along the circumference of the explosion-proof valve, there is a first distance B between the two support parts (2011), and the first distance B satisfies: B≥2t.

16. An explosion-proof valve according to any one of claims 1-5, characterized in that, Along the circumference of the explosion-proof valve, there is a first distance B between the two support parts (2011), the first distance B satisfying: 4mm≤B≤5mm.

17. An explosion-proof valve according to any one of claims 1-5, characterized in that, Along the height direction of the explosion-proof valve, the support (2011) has a first height H, which satisfies: 16mm≤H≤20mm.

18. An explosion-proof valve according to any one of claims 1-5, characterized in that, Along the thickness direction of the support arm (201), the support portion (2011) has a first thickness t; Along the height direction of the explosion-proof valve, the support (2011) has a first height H, which satisfies: H≥8t.

19. An explosion-proof valve according to claim 7, characterized in that, The radius of the chamfer (204) is 0.5mm-1.0mm.

20. An explosion-proof valve according to any one of claims 1-5, characterized in that, Also includes: A sealing ring (400) is provided on the explosion-proof valve body (100), and the sealing ring (400) is arranged around the outer periphery of a portion of the connecting assembly (200).

21. An explosion-proof valve according to claim 20, characterized in that, Part of the support arm (201) is located inside the sealing ring (400).

22. The explosion-proof valve according to claim 20, characterized in that, The claw (202) is located on the side of the sealing ring (400) away from the explosion-proof valve body (100).

23. An explosion-proof valve according to any one of claims 1-5, characterized in that, The claw (202) has a guide surface (2022), and the extension direction of the guide surface (2022) and the extension direction of the support (2011) are set at an angle α, wherein the angle α satisfies: 50°≤α≤70°.

24. The explosion-proof valve according to claim 4, characterized in that, Also includes: The top cover (500) is located on the side of the explosion-proof valve body (100) away from the support arm (201), and the top cover (500) covers the vent.

25. A battery pack, characterized in that, The device includes a battery housing and an explosion-proof valve according to any one of claims 1-24, wherein the explosion-proof valve is disposed in the battery housing. The battery housing has a through hole, through which the connection assembly (200) of the explosion-proof valve passes and is connected to the battery housing.

26. An electrical appliance, characterized in that, The device includes an electrical appliance and a battery pack as described in claim 25, the battery pack being used to provide electrical power to the electrical appliance.

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