Waterproof ventilation valve, battery pack and electric equipment

Abstract

The embodiment of the invention provides a waterproof ventilation valve, a battery pack and electric equipment, and relates to the technical field of battery pack accessories. The waterproof ventilation valve comprises a valve body, the valve body is used for being arranged on a shell of the battery pack, a first ventilation channel is formed in the valve body, and one end of the first ventilation channel communicates with the interior of the shell; the valve cover is arranged on the side, away from the shell, of the valve body, at least one second ventilation channel is formed in the valve cover, one end of the second ventilation channel communicates with the first ventilation channel, a ventilation opening is formed in the other end of the second ventilation channel, the ventilation opening communicates with the exterior of the shell, and the ventilation opening is formed towards the shell. According to the waterproof ventilation valve, the battery pack and the electric equipment, impurities can be prevented from entering the shell of the battery pack, so that the failure of the battery pack caused by the impurities is prevented.

Description

Technical Field

[0001] This application relates to the field of battery pack accessories technology, and in particular to a waterproof and breathable valve, a battery pack, and an electrical device. Background Technology

[0002] During operation, the heating and cooling of the cells inside the battery pack, as well as changes in the ambient temperature outside the battery pack, can all lead to an imbalance in pressure inside and outside the battery pack. The waterproof and breathable valve can compensate for the gas pressure difference between the inside and outside of the battery pack, thereby maintaining the pressure balance inside and outside the battery pack.

[0003] The waterproof and breathable valve of the relevant technology includes a valve body and a vent. The valve body is installed on the housing of the battery pack, and the vent is located on the valve body. One end of the vent is connected to the outside of the housing, and the other end of the vent is connected to the inside of the housing. When the pressure inside and outside the battery pack is unbalanced, air enters or exits through the vent, thereby allowing the battery pack to be compensated for gas through the vent of the valve body.

[0004] However, when the vehicle is in motion, impurities such as mud and sand on the road may enter the valve body through the vent. If these impurities enter the battery pack casing, they may cause the battery pack to fail. Summary of the Invention

[0005] This application provides a waterproof and breathable valve, a battery pack, and an electrical device to solve the technical problem in related technologies where impurities such as mud and sand enter the battery pack casing through the vent, causing battery pack failure.

[0006] In a first aspect, embodiments of this application provide a waterproof and breathable valve, comprising:

[0007] A valve body is provided on the housing of a battery pack. The valve body has a first venting channel inside, and one end of the first venting channel is connected to the interior of the housing.

[0008] A valve cover is disposed on the side of the valve body away from the housing. The valve cover is provided with at least one second venting channel. One end of the second venting channel is connected to the first venting channel, and the other end of the second venting channel has a vent. The vent is connected to the outside of the housing and is oriented towards the housing.

[0009] In some embodiments, the valve cover includes a sealing portion and a connecting portion, the connecting portion being disposed on the sealing portion and the connecting portion being detachably connected to the outer side wall of the valve body, so that the sealing portion abuts against or disengages from the end of the valve body, and the second venting channel is disposed on the connecting portion.

[0010] In some embodiments, the second ventilation channel includes a first ventilation section and a second ventilation section that are interconnected. The first ventilation section is connected to the first ventilation channel. The ventilation port is disposed at the end of the second ventilation section away from the first ventilation section. Both the first ventilation section and the second ventilation section are disposed on the connecting portion.

[0011] In some embodiments, the first vent is arranged radially along the connecting portion, and the second vent is arranged axially along the connecting portion.

[0012] In some embodiments, multiple second venting channels are provided, and the multiple second venting channels are evenly distributed along the circumference of the valve cover.

[0013] In some embodiments, a breathable membrane is further included, wherein at least two breathable membranes are provided, and the breathable membranes are disposed within the first ventilation channel.

[0014] In some embodiments, the breathable membrane is a polytetrachloroethylene membrane.

[0015] In some embodiments, the diameter of the pores on the breathable membrane is 0.1 μm-10 μm.

[0016] In some embodiments, a flow guide is further included, wherein a flow guide space is formed between adjacent breathable membranes, the flow guide is disposed within the flow guide space, and the flow guide is used to slow down the speed at which air flows toward the breathable membrane.

[0017] In some embodiments, the flow guide includes a plurality of flow guide plates. Along the radial direction of the valve body, one side of the plurality of flow guide plates is connected to each other, and the other side of the plurality of flow guide plates extends to the location of the inner wall of the first ventilation channel. A flow guide groove is formed between adjacent flow guide plates to allow air to pass through, thereby slowing down the speed at which air flows toward the breathable membrane.

[0018] In some embodiments, the guide groove is spirally arranged along the axial direction of the valve body.

[0019] In some embodiments, the valve body includes a mounting portion and an abutment portion. The mounting portion is detachably connected to the housing. The first vent passage is disposed within the mounting portion. The valve cover is disposed on the mounting portion. The abutment portion is disposed on the outer side wall of the mounting portion and is used to abut against the housing.

[0020] In some embodiments, an air gap is formed between the vent and the contact portion.

[0021] In some embodiments, a seal is further included, the seal being disposed on the abutment portion, the seal being used to seal between the abutment portion and the housing.

[0022] Secondly, embodiments of this application provide a battery pack, including a housing and a waterproof and breathable valve disposed on the housing.

[0023] Thirdly, embodiments of this application provide an electrical device, including a device body and a battery pack disposed on the device body.

[0024] This application provides a waterproof and breathable valve, a battery pack, and electrical equipment. The waterproof and breathable valve provided in this application allows air to enter or exit through a vent, a first vent, and a second vent when there is an imbalance in the internal and external pressure of the battery pack. This enables gas compensation within the battery pack, preventing internal and external pressure imbalance and indirectly improving battery pack safety. By orienting the vent towards the housing, the valve cover and housing can indirectly block the vent, preventing impurities such as mud and sand from entering the vent while the vehicle is in motion. This prevents impurities from entering the battery pack housing and causing battery pack failure, further improving battery pack safety. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 This is a schematic diagram of the structure of the waterproof and breathable valve provided in this application;

[0027] Figure 2 A half-sectional structural diagram of the waterproof and breathable valve provided in this application;

[0028] Figure 3 for Figure 1 A schematic diagram of the exploded structure;

[0029] Figure 4 for Figure 1 Schematic diagram of the middle valve cover;

[0030] Figure 5 for Figure 2 Schematic diagram of the middle guide component;

[0031] Figure 6 for Figure 5 A structural diagram from another angle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Valve body; 110. First vent passage; 120. Mounting part; 130. Abutment part; 131. Vent spacing;

[0034] 200. Valve cover; 210. Second vent passage; 211. Vent; 212. First vent section; 213. Second vent section;

[0035] 220. Enclosure; 230. Connecting part;

[0036] 300. Breathable membrane; 310. Airflow channel;

[0037] 400. Flow guide; 410. Flow guide plate; 420. Flow guide groove;

[0038] 500, limiting groove; 510, sealing ring.

[0039] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0040] 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 numbers 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 application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0041] The waterproof and breathable valve of the relevant technology includes a valve body and a vent. The valve body is installed on the housing of the battery pack, and the vent is located on the valve body. One end of the vent is connected to the outside of the housing, and the other end of the vent is connected to the inside of the housing. When the pressure inside and outside the battery pack is unbalanced, air enters or exits through the vent, thereby allowing the battery pack to be compensated for gas through the vent of the valve body.

[0042] However, vehicles face numerous potential risks when driving on complex road conditions, especially on muddy, gravelly, or other rough surfaces. Mud, dust, and other fine impurities on the road surface may be stirred up by the airflow. Because the vent is axially positioned along the valve body, these impurities can enter the valve body through the vent of the waterproof vent valve. Once these impurities enter the battery pack casing, they can cause physical damage to critical components such as the battery cells and circuits, potentially leading to short circuits and other dangerous situations. This can result in battery pack failure, affecting not only the vehicle's normal operation but also posing serious safety hazards and causing significant inconvenience to vehicle use and maintenance.

[0043] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0044] Combination Figures 1 to 6 This application provides a waterproof and breathable valve, comprising:

[0045] Valve body 100 is used to be installed on the housing of battery pack. The valve body 100 has a first venting channel 110 inside, and one end of the first venting channel 110 is connected to the inside of the housing.

[0046] The valve cover 200 is disposed on the side of the valve body 100 away from the housing. The valve cover 200 is provided with at least one second venting channel 210. One end of the second venting channel 210 is connected to the first venting channel 110, and the other end of the second venting channel 210 has a vent 211. The vent 211 is connected to the outside of the housing and is oriented towards the housing.

[0047] In this application, when the internal and external pressures of the battery pack are unbalanced, air is introduced or vented through the vent 211, the first venting channel 110, and the second venting channel 210, thereby enabling gas compensation in the battery pack and preventing internal and external pressure imbalances, thus indirectly improving the safety of the battery pack. By facing the vent 211 toward the housing, the valve cover 200 and the housing can indirectly block the vent 211, preventing impurities such as mud and sand on the road from entering the vent 211 when the vehicle is driving, thereby preventing impurities such as mud and sand from entering the battery pack housing and causing battery pack failure, further improving the safety of the battery pack.

[0048] Multiple second ventilation channels 210 are provided, and the multiple second ventilation channels 210 are evenly distributed along the circumference of the valve cover 200.

[0049] In this embodiment, the cross-sectional area of ​​the first ventilation channel 110 is larger than that of the second ventilation channel 210, so that multiple second ventilation channels 210 can simultaneously enter or exit air through the first ventilation channel 110. The number of second ventilation channels 210 can be adjusted as needed. For example, twelve second ventilation channels 210 can be set and the twelve second ventilation channels 210 can be evenly distributed along the circumference of the valve cover 200.

[0050] The valve cover 200 includes a sealing part 220 and a connecting part 230. The connecting part 230 is disposed on the sealing part 220 and is used to be detachably connected to the outer side wall of the valve body 100 so that the sealing part 220 abuts against or disengages from the end of the valve body 100. The second venting channel 210 is disposed on the connecting part 230.

[0051] In this embodiment, the sealing part 220 is circular and the connecting part 230 is annular. The sealing part 220 and the connecting part 230 are integrally formed. The connecting part 230 is sleeved and threadedly connected to the outer side wall of the valve body 100, so that the connecting part 230 is detachably connected to the outer side of the valve body 100. The threaded connection facilitates the installation and removal of the valve cover 200 and improves the fixing strength of the valve cover 200 to the valve body 100.

[0052] In other embodiments, the shapes of the closure portion 220 and the connecting portion 230 can be adapted as needed. For example, the inner wall of the connecting portion 230 can be set as a circle, and the outer wall of the connecting portion 230 can be set as a rectangle. Alternatively, a baffle can be provided on the outer wall of the connecting portion 230 along the circumference of the connecting portion 230, so that the baffle can further block the vent holes on the connecting portion 230.

[0053] In this application, by employing a sealing part 220 and a connecting part 230, and since the connecting part 230 is located on the outer side wall of the valve body 100, and by providing a second venting channel 210 on the connecting part 230, the second venting channel 210 can be located on the side of the valve body 100 for air intake or exhaust, further preventing impurities such as mud and sand from entering the battery pack housing and causing battery pack failure; by detachably connecting the connecting part 230 to the outer side wall of the valve body 100, it is convenient to remove the valve cover 200 for maintenance of the valve cover 200 and the second venting channel 210.

[0054] The second ventilation channel 210 includes a first ventilation section 212 and a second ventilation section 213 that are interconnected. The first ventilation section 212 is connected to the first ventilation channel 110. The ventilation port 211 is located at the end of the second ventilation section 213 away from the first ventilation section 212. Both the first ventilation section 212 and the second ventilation section 213 are located on the connecting part 230.

[0055] In this embodiment, the first venting section 212 and the second venting section 213 have the same cross-sectional area.

[0056] In this application, by employing a first vent 212 and a second vent 213, when air needs to enter through the first vent channel 110, air from outside the housing can enter the second vent 213 along the vent 211, enter the first vent 212 through the second vent 213, and then enter the first vent channel 110 along the first vent 212. When air needs to exit through the first vent channel 110, air from inside the housing can enter the first vent 212 along the first vent channel 110, and then exit to the outside of the housing along the second vent 213 and the vent 211. The structure is simple by employing a first vent 212 and a second vent 213.

[0057] The first vent 212 is arranged radially along the connecting portion 230, and the second vent 213 is arranged axially along the connecting portion 230.

[0058] In this embodiment, the first ventilation section 212 and the second ventilation section 213 are generally arranged in an "L" shape, and the connection position of the first ventilation section 212 and the second ventilation section 213 can be arc-shaped.

[0059] In this application, by arranging the first vent 212 radially along the connecting portion 230 and the second vent 213 axially along the connecting portion 230, even if some impurities such as mud and sand enter along the second vent 213, the mutually perpendicular first vent 212 and second vent 213 can block the impurities such as mud and sand, making it difficult for them to enter the first venting channel 110 through the first vent 212 and second vent 213, thereby further preventing impurities such as mud and sand from causing battery pack failure.

[0060] In other embodiments, the shapes of the first vent 212 and the second vent 213 can be adapted as needed. For example, the first vent 212 and the second vent 213 can be set in a wavy shape to further prevent impurities such as mud and sand from entering. Alternatively, the first vent 212 and the second vent 213 can be inclinedly arranged on the connecting portion 230. For example, the first vent 212 and the second vent 213 can form an angle with the axis of the valve body 100, so that the vent 211 can also face the housing.

[0061] The waterproof and breathable valve also includes a breathable membrane 300, of which at least two are provided, and the breathable membrane 300 is disposed within the first ventilation channel 110.

[0062] In this embodiment, two breathable membranes 300 are provided. The two breathable membranes 300 are fixed in the first ventilation channel 110 by injection molding, bonding, hot melting or welding. The axis of the valve body 100 is perpendicular to the plane where the breathable membranes 300 are located. The area of ​​one breathable membrane 300 is larger than the area of ​​the other breathable membrane 300.

[0063] In this application, by employing a breathable membrane 300, air is allowed to pass freely, thereby achieving a balance of air pressure inside and outside the battery pack. This effectively alleviates the pressure difference problem caused by temperature changes or vehicle operation. Simultaneously, the breathable membrane 300 prevents moisture, dust, mud, and other impurities from entering the battery pack, protecting the delicate components inside from contamination and damage, thus further preventing battery pack failure caused by moisture, dust, mud, and other impurities. By using two breathable membranes 300, the performance of the waterproof breathable valve can be significantly enhanced. On one hand, two breathable membranes 300 can provide a larger gas exchange area, improving gas flow efficiency and making air pressure balancing faster and more effective. On the other hand, two breathable membranes 300 can form a more reliable protective barrier, further improving the waterproof and dustproof level, reducing the risk of impurity penetration, thereby more effectively protecting the battery pack, extending its service life, and ensuring the safe and stable operation of the vehicle. When one breathable membrane 300 ruptures and fails, the other breathable membrane 300 can still function normally, thereby indirectly improving the service life of the waterproof breathable valve.

[0064] The breathable membrane 300 is a polytetrachloroethylene membrane.

[0065] In this application, a polytetrafluoroethylene (PTFE) membrane is used. PTFE membrane has excellent chemical stability, can resist the erosion of various acids, alkalis and chemicals, and ensures that the breathable membrane 300 can work stably for a long time in harsh environments. Its surface energy is extremely low, and it has good hydrophobicity and oil resistance, which can effectively prevent liquid penetration while allowing gas to pass through smoothly. In addition, PTFE membrane also has high mechanical strength and temperature resistance, and can maintain good performance over a wide temperature range, and is not easily deformed or damaged.

[0066] In other embodiments, the breathable membrane 300 can also be made of polyvinylidene fluoride (PVDF) membrane, which also has good chemical stability and weather resistance, and can effectively resist the erosion of a variety of chemicals; its mechanical properties are also quite good, and it can withstand a certain amount of pressure and friction; the breathable membrane 300 can also be made of polypropylene membrane, which has the characteristics of low cost and good processing performance, and at the same time has a certain degree of breathability and hydrophobicity, making it suitable for occasions where cost is sensitive and the requirements for waterproof and breathable performance are relatively moderate.

[0067] The diameter of the pores on the breathable membrane 300 is 0.1μm-10μm.

[0068] In this application, the diameter of the vent holes on the breathable membrane 300 is set in the range of 0.1μm-10μm, which can effectively block impurities such as dust, pollen, bacteria and fine particulate matter from entering the battery pack while ensuring smooth gas passage, thereby providing good waterproof, dustproof and pollution-proof performance; in addition, the smaller pore size helps to improve the strength and stability of the breathable membrane 300, so that it can maintain good breathability in various harsh environments.

[0069] In this embodiment, the pores on the breathable membrane 300 can be set to the same diameter, or the pores on the breathable membrane 300 can be set to different diameters.

[0070] The waterproof and breathable valve also includes a flow guide 400. A flow guide space 310 is formed between adjacent breathable membranes 300. The flow guide 400 is disposed in the flow guide space 310 and is used to slow down the speed at which air flows toward the breathable membrane 300.

[0071] In this application, when air flows towards the breathable membrane 300 at a high speed, its kinetic energy is large, and it will generate a large impact force when it comes into contact with the breathable membrane 300, which may cause deformation, damage or shorten the service life of the breathable membrane 300. However, by using the guide element 400, the air passes through the guide element 400 for buffering before reaching the breathable membrane 300. The speed of the air will be reduced due to friction, collision and other effects. As the speed decreases, the kinetic energy of the air decreases, and its impact force on the breathable membrane 300 also decreases. This indirectly protects the breathable membrane 300, extends the service life of the breathable membrane 300, and also reduces noise and vibration caused by excessive impact force, thereby improving stability and reliability.

[0072] In this application, by slowing down the airflow speed towards the breathable membrane 300, the heat exchange between the air and the breathable membrane 300 is more uniform and slower when the airflow speed is slower. This avoids the rapid local temperature changes caused by rapid flow. This smooth temperature transition can reduce the situation where water vapor in the air cools rapidly on the surface of the breathable membrane 300 and condenses into liquid water, thereby reducing the generation of condensate. The reduction of condensate can not only avoid the negative impact of moisture accumulation on the performance of the breathable membrane 300, but also prevent moisture from seeping into the battery pack and causing safety hazards such as short circuits, thereby improving the reliability of the waterproof breathable valve and the safety of the battery pack.

[0073] The flow guide 400 includes a plurality of flow guide plates 410. Along the radial direction of the valve body 100, one side of the plurality of flow guide plates 410 is connected to each other, and the other side of the plurality of flow guide plates 410 extends to the position of the inner wall of the first ventilation channel 110. A flow guide groove 420 is formed between adjacent flow guide plates 410. The flow guide groove 420 is used to allow air to pass through, so as to slow down the speed of air flowing towards the breathable membrane 300.

[0074] In this embodiment, six guide plates 410 are provided, and the six guide plates 410 are evenly distributed along the circumference of the first ventilation channel 110. The number of guide plates 410 can be adjusted as needed, for example, the number of guide plates 410 can be adjusted to eight. The guide plates 410 can be fixed on the inner wall of the first ventilation channel 110 by welding, bonding or bolting.

[0075] In this application, by employing multiple guide plates 410 and spacing them apart, guide channels 420 can be automatically formed between adjacent guide channels 420. Multiple guide channels 420 can be formed simply by installing multiple guide plates 410, eliminating the need for separate production and processing of guide channels 420, thus reducing the structural complexity of the guide component 400. Air passing through one of the breathable membranes 300 can enter the guide channel 420 and flow along the guide channel 420, causing the guide channel 420 to slow down the speed at which air flows towards the other breathable membrane 300.

[0076] Along the axial direction of the valve body 100, the guide groove 420 is spirally arranged.

[0077] In this embodiment, multiple guide plates 410 are spirally distributed along the axial direction of the valve body 100, so that a spiral guide groove 420 can be formed between adjacent guide plates 410. The shape of the guide groove 420 can be adaptively adjusted as needed, for example, the guide groove 420 can be set as a wave shape or an arc shape.

[0078] In this application, a spiral-shaped guide channel 420 is used, which can extend the air flow path, forcing the air to move slowly along a spiral trajectory before entering the breathable membrane 300, thereby effectively slowing down the air flow rate. The spiral-shaped guide channel 420 not only increases the contact area and contact time between the air and the inner wall of the guide channel 420, further promoting heat exchange and reducing the generation of condensate, but also evenly disperses the airflow, avoiding excessive local airflow concentration that could impact the breathable membrane 300. Furthermore, by using a spiral-shaped guide channel 420, the guide channel 420 can change the airflow direction before the air enters the breathable membrane 300, allowing the air to impact the breathable membrane 300 at a certain angle, rather than in a direction perpendicular to the breathable membrane 300, thereby further reducing the impact force on the breathable membrane 300, thus further protecting the breathable membrane 300 and extending its service life. In other embodiments, the flow guide 400 can be replaced with a flow guide block. By uniformly opening multiple flow guide grooves 420 along the circumference of the flow guide block, the flow guide grooves 420 can also slow down the speed at which air flows toward the breathable membrane 300. The flow guide 400 can also be replaced with a flow guide block made of porous material disposed between two breathable membranes 300.

[0079] The valve body 100 includes a mounting portion 120 and an abutment portion 130. The mounting portion 120 is detachably connected to the housing. A first venting channel 110 is disposed inside the mounting portion 120. The valve cover 200 is disposed on the mounting portion 120. The abutment portion 130 is disposed on the outer side wall of the mounting portion 120 and is used to abut against the housing.

[0080] In this embodiment, the cross-section of the mounting portion 120 is circular, and the cross-section of the abutting portion 130 is circular. The shapes of the mounting portion 120 and the abutting portion 130 can be adapted as needed, for example, the mounting portion 120 and the abutting portion 130 can be set as rectangles. The mounting portion 120 and the abutting portion 130 are integrally formed and are made of metal material, such as aluminum alloy. The outer side wall of the mounting portion 120 away from the housing is provided with a first threaded portion that is threadedly connected to the connecting portion 230, and the outer side wall of the mounting portion 120 near the housing is provided with a second threaded portion that is threadedly connected to the housing. The mounting portion 120 is detachably connected to the housing through the second threaded portion.

[0081] In this application, the mounting part 120 is detachably connected to the housing via the second threaded part, which facilitates the installation and removal of the valve body 100, thereby facilitating the maintenance and replacement of the valve body 100 and improving the fixing strength of the valve body 100 to the housing, preventing vibration from causing the valve body 100 to detach from the housing; by adopting the abutment part 130, a preliminary sealing effect can be achieved between the valve body 100 and the housing, preventing some impurities from entering the housing along the gap between the valve body 100 and the housing, thereby indirectly improving the sealing performance between the valve body 100 and the housing.

[0082] A ventilation gap 131 is formed between the vent 211 and the contact portion 130.

[0083] In this application, by adopting the setting of the ventilation gap 131, it is possible to prevent the abutment part 130 from blocking the air intake or exhaust of the vent 211, thereby indirectly improving the effect of the waterproof vent valve in balancing the pressure of the housing.

[0084] In this embodiment, the size of the ventilation gap 131 can be adjusted as needed, for example, the ventilation gap 131 can be set to 1mm-10mm, thereby preventing impurities from entering the ventilation port 211 along the ventilation gap 131.

[0085] In other embodiments, the connecting part 230 may abut against the abutting part 130, and by providing a channel on the abutting part 130 that communicates with the vent 211, the vent 211 can also achieve air intake or exhaust through the channel.

[0086] The waterproof and breathable valve also includes a seal, which is disposed on the abutment portion 130 and is used to seal between the abutment portion 130 and the housing.

[0087] In this embodiment, a limiting groove 500 is provided on the side of the abutment portion 130 facing the housing. The limiting groove 500 is arranged along the circumference of the abutment portion 130. The sealing element includes a sealing ring 510, which is a rubber ring or a silicone ring. The limiting groove 500 is used to accommodate the sealing ring 510.

[0088] In this application, when the mounting part 120 is threaded onto the housing, the mounting part 120 can drive the abutment part 130 to move toward the housing. At this time, the abutment part 130 and the housing squeeze the sealing ring 510, so that the sealing ring 510 is squeezed into the limiting groove 500, thereby sealing the abutment part 130 and the housing, preventing impurities from entering along the gap between the abutment part 130 and the housing, and further preventing impurities from entering the housing along the gap between the mounting part 120 and the housing.

[0089] This application also provides a battery pack, including a housing and a waterproof and breathable valve of any of the above embodiments disposed on the housing.

[0090] This application also provides an electrical device, including a device body and a battery pack of any of the above embodiments disposed on the device body.

[0091] The specific structure of the waterproof and breathable valve has been described in detail in the above embodiments, and will not be repeated here.

[0092] In this embodiment, the electrical equipment is a vehicle; in other embodiments, the electrical equipment may also be an energy storage system.

[0093] The electrical equipment provided in this application, by incorporating a waterproof and breathable valve, allows air inside the battery pack housing to be discharged along the first ventilation channel 110, the guide groove 420, the first ventilation section 212, the second ventilation section 213, and the vent 211 when pressure needs to be balanced. Conversely, air outside the housing can enter the housing along the vent 211, the second ventilation section 213, the first ventilation section 212, the guide groove 420, and the first ventilation channel 110, thereby achieving pressure balance within the housing. The guide groove 420 slows the airflow towards the breathable membrane 300, reducing the impact force of air on the breathable membrane 300 and decreasing the generation of condensate, thus indirectly protecting the breathable membrane 300. This extends the service life of the breathable membrane 300; the breathable membrane 300 can block impurities, preventing them from entering the housing and causing battery pack failure; by arranging the second vent 213 along the axial direction of the valve body 100 and the first vent 212 along the radial direction of the valve body 100, the second vent 213 can drive the vent 211 to face the housing, and the vent 211 can be deviated from the vehicle's direction of travel, so that the valve cover 200 and the housing can indirectly block the vent 211, preventing impurities such as mud and sand on the road from entering the vent 211 when the vehicle is driving, thereby preventing impurities such as mud and sand from entering the battery pack housing and causing battery pack failure, further improving the safety of the battery pack.

[0094] 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. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A waterproof and breathable valve, characterized in that, include: A valve body (100) is provided on the housing of a battery pack. The valve body (100) has a first venting channel (110) inside, one end of which is connected to the inside of the housing. A valve cover (200) is disposed on the side of the valve body (100) away from the housing. The valve cover (200) is provided with at least one second venting channel (210). One end of the second venting channel (210) is connected to the first venting channel (110). The other end of the second venting channel (210) has a vent (211). The vent (211) is connected to the outside of the housing and is oriented towards the housing.

2. The waterproof and breathable valve according to claim 1, characterized in that, The valve cover (200) includes a sealing part (220) and a connecting part (230). The connecting part (230) is disposed on the sealing part (220) and is used to detachably connect to the outer side wall of the valve body (100) so that the sealing part (220) abuts against or disengages from the end of the valve body (100). The second venting channel (210) is disposed on the connecting part (230).

3. The waterproof and breathable valve according to claim 2, characterized in that, The second ventilation channel (210) includes a first ventilation section (212) and a second ventilation section (213) that are connected to each other. The first ventilation section (212) is connected to the first ventilation channel (110). The ventilation port (211) is located at the end of the second ventilation section (213) away from the first ventilation section (212). Both the first ventilation section (212) and the second ventilation section (213) are located on the connecting part (230).

4. The waterproof and breathable valve according to claim 3, characterized in that, The first vent (212) is arranged radially along the connecting part (230), and the second vent (213) is arranged axially along the connecting part (230).

5. The waterproof and breathable valve according to claim 1, characterized in that, Multiple second ventilation channels (210) are provided, and the multiple second ventilation channels (210) are evenly distributed along the circumference of the valve cover (200).

6. The waterproof and breathable valve according to claim 1, characterized in that, It also includes a breathable membrane (300), of which at least two are provided, and the breathable membrane (300) is disposed within the first ventilation channel (110).

7. The waterproof and breathable valve according to claim 6, characterized in that, The breathable membrane (300) is a polytetrachloroethylene membrane.

8. The waterproof and breathable valve according to claim 6, characterized in that, The diameter of the pores on the breathable membrane (300) is 0.1μm-10μm.

9. The waterproof and breathable valve according to claim 6, characterized in that, It also includes a flow guide (400), and a flow guide space (310) is formed between adjacent breathable membranes (300). The flow guide (400) is disposed in the flow guide space (310) and is used to slow down the speed at which air flows toward the breathable membrane (300).

10. The waterproof and breathable valve according to claim 9, characterized in that, The flow guide (400) includes a plurality of flow guide plates (410). Along the radial direction of the valve body (100), one side of the plurality of flow guide plates (410) is connected to each other, and the other side of the plurality of flow guide plates (410) extends to the position of the inner wall of the first ventilation channel (110). A flow guide groove (420) is formed between adjacent flow guide plates (410). The flow guide groove (420) is used to allow air to pass through, so as to slow down the speed of air flowing towards the breathable membrane (300).

11. The waterproof and breathable valve according to claim 10, characterized in that, Along the axial direction of the valve body (100), the guide groove (420) is spirally arranged.

12. The waterproof and breathable valve according to any one of claims 1-11, characterized in that, The valve body (100) includes a mounting part (120) and an abutment part (130). The mounting part (120) is detachably connected to the housing. The first venting channel (110) is disposed in the mounting part (120). The valve cover (200) is disposed on the mounting part (120). The abutment part (130) is disposed on the outer side wall of the mounting part (120) and is used to abut against the housing.

13. The waterproof and breathable valve according to claim 12, characterized in that, A ventilation gap (131) is formed between the vent (211) and the contact portion (130).

14. The waterproof and breathable valve according to claim 12, characterized in that, It also includes a seal disposed on the abutment portion (130) for sealing between the abutment portion (130) and the housing.

15. A battery pack, characterized in that, It includes a housing and a waterproof and breathable valve as described in any one of claims 1-14 disposed on the housing.

16. An electrical appliance, characterized in that, It includes a device body and a battery pack as described in claim 15 disposed on the device body.

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