CN216242528U

CN216242528U - Explosion-proof valve

Info

Publication number: CN216242528U
Application number: CN202123003978.8U
Authority: CN
Inventors: 黄祥斌; 吴自强
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-08
Anticipated expiration: 2031-12-01
Also published as: WO2023098596A1

Abstract

The application discloses explosion-proof valve includes: the valve comprises a valve body, a moisture absorption piece and a valve core assembly, wherein the valve body is provided with an accommodating cavity, a first end face of the valve body is provided with a first opening, a second end face of the valve body is provided with a second opening, and the first opening, the accommodating cavity and the second opening are sequentially communicated; the moisture absorption piece is arranged in the accommodating cavity; the valve core assembly is connected with the valve body, slides between a first position and a second position relative to the valve body, and is covered on the first opening when in the first position and is removed from the first opening when in the second position. According to the embodiment of the application, the damage to the elements inside the equipment such as the battery pack caused by moisture can be avoided, meanwhile, when the moisture absorption piece needs to be replaced, the equipment such as the battery pack does not need to be detached, and the replacement efficiency of the moisture absorption piece is improved.

Description

Explosion-proof valve

Technical Field

The application belongs to the valve field, especially relates to an explosion-proof valve.

Background

As is well known, explosion-proof valves are widely used in various industrial fields as a pressure relief device. For example, the explosion-proof valve is arranged in the battery pack, so that explosion accidents caused by the sharp increase of the pressure in the battery pack can be effectively avoided. However, in the related art, the provision of the explosion-proof valve easily causes external moisture to enter the battery pack, resulting in damage to electronic components in the battery pack.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an explosion-proof valve to solve outside moisture and follow the explosion-proof valve and enter into equipment such as battery package, lead to the problem of electronic component device damage.

In a first aspect, an embodiment of the present application provides an explosion-proof valve, including:

the valve comprises a valve body, a valve body and a valve body, wherein an accommodating cavity is formed in the valve body, a first opening is formed in a first end face of the valve body, a second opening is formed in a second end face of the valve body, and the first opening, the accommodating cavity and the second opening are sequentially communicated;

the moisture absorption piece is arranged in the accommodating cavity;

the valve core assembly is connected with the valve body and slides between a first position and a second position relative to the valve body, the valve core assembly is covered on the first opening when in the first position, and the valve core assembly is moved away from the first opening when in the second position.

The embodiment of the application provides an explosion-proof valve, including the valve body, moisture absorption spare and case subassembly, it holds the chamber to have in the valve body, the first terminal surface of valve body is provided with first opening, the second terminal surface of valve body is provided with the second opening, first opening, hold chamber and second opening and communicate in proper order, moisture absorption spare sets up in holding the chamber, the case subassembly is connected with the valve body, the case subassembly slides between primary importance and second place for the valve body, when primary importance, first opening is located to case subassembly lid, when the second place, the case subassembly removes first opening. In this embodiment, valve body and case subassembly sliding connection can realize the process at explosion-proof release, and when case subassembly removed first opening, moisture absorption spare can absorb the moisture that enters into and hold the chamber, avoids moisture to cause the damage to the inside component of equipment such as battery package, and meanwhile, when moisture absorption spare needs to be changed, need not to dismantle equipment such as battery package, and then help improving moisture absorption spare's change efficiency.

Optionally, the explosion-proof valve further comprises a balance valve assembly, a third opening is formed in a third end face of the valve body and communicated with the accommodating cavity, and the balance valve assembly is fixedly connected with the valve body in the third opening.

The third end face of the valve body is provided with a third opening, a balance valve component is arranged in the third opening, the internal pressure and the external pressure of the explosion-proof valve can be balanced through the balance valve component under the condition that the pressure difference inside the explosion-proof valve is small, and the working safety of the explosion-proof valve is improved.

Optionally, the balance valve assembly includes a valve plate, a protection frame fixedly connected with the valve body is arranged in the third opening, and the valve plate is arranged on one side of the protection frame far away from the accommodating cavity;

the valve block includes valve block main part and the movable part of swing joint, and valve block main part and protective frame fixed connection, part movable part paste locate protective frame on, the movable part is in the direction of keeping away from protective frame, for valve block main part unidirectional motion.

This embodiment can make moisture absorption spare can fully absorb the moisture that gets into in the air that holds the chamber, avoids moisture to reach inside for example equipment such as battery package, effectively protects the inside electronic components of equipment such as battery package.

Optionally, the balance valve assembly further comprises a limiting frame, and the limiting frame presses the valve plate main body on the protective frame;

the spacing frame is provided with a space for the unidirectional movement of the movable part.

Through setting up spacing frame, can reliably ground the valve block main part and establish on protective frame to can provide corresponding motion space for the movable part, and then help improving balanced valve module's operational reliability.

Optionally, the explosion-proof valve further comprises a waterproof breathable film and a pressing strip;

the waterproof breathable film and the pressing strip are arranged on one side, far away from the valve block, of the limiting frame, the pressing strip is fixedly connected with the valve body, and the waterproof breathable film is pressed on the limiting frame through the pressing strip.

The embodiment can reduce the moisture content reaching the accommodating cavity, and further contributes to prolonging the service life of the moisture absorbing part.

Optionally, the valve body comprises a main body part and a boss part, and the boss part is fixedly connected to the peripheral surface of the main body part;

the first end face and the second end face are two opposite end faces of the main body portion in the height direction, the peripheral face of the main body portion is located between the first end face and the second end face, and the third end face is an end face, far away from the main body portion, of the boss portion.

Through the arrangement of the boss part, the third opening can have a larger axial length, and further the assembly of components such as the balance valve assembly and the like in the third opening is facilitated.

Optionally, the valve body comprises a main body part and a guide part, the accommodating cavity is located in the main body part, and the guide part is fixedly connected with the main body part in the accommodating cavity; the valve core assembly is connected with the guide part in a sliding mode.

In this embodiment, the valve body includes a guide that can be used to provide guidance for movement of the poppet assembly, thereby facilitating reliability of movement of the poppet assembly between the first and second positions.

Optionally, the valve core assembly comprises a push rod, a cover plate and an elastic piece, and the push rod is fixedly connected with the cover plate;

the guide part is provided with a guide hole, the push rod is connected in the guide hole in a sliding manner, two ends of the elastic piece are respectively connected to the guide part and the push rod, when the elastic piece is in a release state, the valve core assembly is located at the first position, and the cover plate is covered on the first opening.

The embodiment can improve the working reliability of the explosion-proof valve.

Optionally, the valve body further comprises a limiting part, the limiting part is fixedly connected with the main body part in the accommodating cavity, and the moisture absorbing part is pressed on the inner wall of the accommodating cavity by the limiting part.

Through setting up spacing portion in this embodiment, help fixing better between moisture absorption spare and the valve body, improve explosion-proof valve's overall structure's stability.

Optionally, the explosion-proof valve further comprises a tray, and the tray is fixedly connected with the valve body at the second opening.

Set up the tray at the second opening part and be connected with the valve body, can be with moisture absorption spare isotructure restriction in holding the chamber, improve explosion-proof valve's overall structure's stability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view showing the construction of an explosion-proof valve in the related art;

FIG. 2 is a schematic perspective view of an explosion-proof valve provided in an embodiment of the present application;

FIG. 3 is a top view of an explosion-proof valve provided by an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a fragmentary detail at the counterbalance valve assembly;

FIG. 6 is a schematic diagram of the structure of a valve plate in a balanced valve assembly.

Shown in fig. 1: 10-valve body, 20-valve core assembly, 21-first opening, 30-spring and 40-sealing washer.

Shown in fig. 2 to 6: 100-valve body, 110-accommodating cavity, 121-first end face, 122-first opening, 131-second end face, 132-second opening, 141-third end face, 142-third opening, 151-main body part, 152-boss part, 153-guide part, 154-skirt, 155-limiting part, 200-moisture absorbing part, 300-valve element component, 310-push rod, 320-cover plate, 330-elastic part, 400-balance valve component, 410-valve plate, 411-valve plate main body, 412-movable part, 413-normally open hole, 420-protective frame, 430-limiting frame, 510-waterproof breathable film, 520-batten and 600-tray.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

Explosion-proof valves are widely used in various industries, such as battery packs, pipes or meters. For simplicity of description, the following description will be given mainly taking an example in which the explosion-proof valve is applied to the battery pack.

Fig. 1 is a schematic structural diagram of an explosion-proof valve in the related art, which includes a valve body 10, a valve core assembly 20, a spring 30, a sealing gasket 40, and the like.

Wherein, the valve body 10 is provided with an opening (not shown in the figure), and under the normal working condition, for example, when the internal pressure of the battery pack is low, the valve core assembly 20 is covered on the opening of the valve body 10 under the action of the spring 30. When the internal pressure of the battery pack is higher than a pressure threshold value, the internal and external pressure difference acts on the valve core assembly 20, and the elastic force of the spring 30 can be overcome, so that the valve core assembly 20 moves away from the opening of the valve body 10, and the pressure in the battery pack is released through the opening.

As shown in fig. 1, there is also an opening in the valve core assembly 20, and for the sake of distinction from the opening in the valve body 10, the opening in the valve core assembly 20 may be referred to as a first opening 21 and the opening in the valve body 10 may be referred to as a second opening. The first opening 21 may be used to balance the pressure difference between the inside and the outside of the battery pack.

Typically, when the pressure within the battery pack is above a pressure threshold, the valve cartridge assembly 20 is moved away from the second opening and is depressurized therethrough. When the pressure difference between the inside and the outside of the battery pack is small, the pressure difference between the inside and the outside is balanced through the first opening 21.

It can be seen that during the operation of the explosion-proof valve, the inside of the battery pack may communicate with the external environment through the first opening 21 or the second opening, and thus, moisture in the external environment may be introduced into the inside of the battery pack.

For example, when the internal and external pressures of the battery pack are balanced through the first opening 21, the internal part of the battery pack exchanges with the external air, the air in the environment contains a certain proportion of moisture, and when the temperature in the battery pack drops and has a temperature difference with the outside, condensed water is generated.

Moisture entering the battery pack can cause adverse effects on the operation of electronic components inside the battery pack, and even damage to the electronic components.

In the related art, a moisture absorbent is usually disposed inside the battery pack to prevent the electronic components from being damaged by external moisture. However, since the amount of moisture absorbed by the moisture absorbent has an upper limit, the moisture absorbent needs to be replaced when the moisture absorbent is full. However, since the moisture absorbent is placed inside the battery pack, the battery pack needs to be disassembled during replacement, which results in low replacement efficiency of the moisture absorbent.

To solve the problems in the related art, embodiments of the present application provide an explosion-proof valve, as shown in fig. 2 to 4, including:

the valve body 100, the valve body 100 has the accommodating cavity 110 therein, the first end face 121 of the valve body 100 is provided with a first opening 122, the second end face 131 of the valve body 100 is provided with a second opening 132, and the first opening 122, the accommodating cavity 110 and the second opening 132 are communicated in sequence;

an absorbent member 200, the absorbent member 200 being disposed in the accommodating chamber 110;

the valve core assembly 300, the valve core assembly 300 is connected to the valve body 100, and the valve core assembly 300 slides relative to the valve body 100 between a first position and a second position, wherein the valve core assembly 300 covers the first opening 122 in the first position, and the valve core assembly 300 is removed from the first opening 122 in the second position.

The explosion-proof valve can be applied to a battery pack, a pipeline, an instrument or other devices, and is not particularly limited herein, and for simplicity of description, the following description will mainly take an example of applying the explosion-proof valve to the battery pack.

The valve body 100 of the explosion-proof valve may have a certain strength and rigidity to support the valve core assembly 300 and the like, and a certain resistance to damage by external force.

The valve body 100 may have an accommodating chamber 110, a first end surface 121 and a second end surface 131, the first end surface 121 is provided with a first opening 122, the second end surface 131 is provided with a second opening 132, and the first opening 122, the accommodating chamber 110 and the second opening 132 are sequentially communicated.

In connection with some examples, when the explosion-proof valve is applied to a battery pack, the second end surface 131 may be an end surface for assembling with the battery pack, and the shape of the end surface may match the shape of the battery pack, so that the explosion-proof valve and the battery pack can be reliably assembled. In the assembled state, the inside of the battery pack may be communicated to the receiving chamber 110 through the second opening 132.

Accordingly, the first opening 122 in the first end surface 121 may be for communicating the receiving cavity 110 with the external environment of the battery pack. In some examples, the first end surface 121 may be an opposite surface of the second end surface 131, or may be an adjacent surface of the second end surface 131, and is not limited herein.

The shape of the first opening 122 and the second opening 132 may be rectangular, circular or other shapes, and may be designed according to actual needs.

In conjunction with the description of the pressure relief principle of the explosion proof valve, in the present embodiment, the second opening 132, the receiving cavity 110 and the first opening 122 may constitute a passage for pressure relief of the interior of the battery pack.

In this embodiment, the accommodating cavity 110 of the valve body 100 may be provided with a moisture absorbing member 200, and the moisture absorbing member 200 may include an organic moisture absorbent or an inorganic moisture absorbent, and the like, which is not limited herein.

In some examples, the moisture absorbing member 200 may include a moisture absorbing agent and a porous container, and the moisture absorbing agent may be filled in the porous container and fixed to the valve body 100 with the porous container or placed in the accommodating chamber 110.

In other examples, the absorbent member 200 may also include a moisture absorbent and a binder resin, and the moisture absorbent is bonded with the binder resin to form the absorbent member 200 having a relatively fixed shape and to be fitted into the receiving cavity 110.

The valve cartridge assembly 300 is slidably coupled to the valve body 100, and the valve cartridge assembly 300 slides relative to the valve body 100 between a first position and a second position.

When the valve core assembly 300 is located at the first position, the valve core assembly 300 can be covered on the first opening 122. The valve core assembly 300 may have a structure with certain strength and rigidity, and when the cover is disposed on the first opening 122, the first opening 122 may be sealed, so as to prevent the inside of the battery pack from communicating with the external space through the first opening 122.

When the valve core assembly 300 is located at the second position, the valve core assembly 300 can be moved away from the first opening 122, so that the first opening 122 is exposed, and the interior of the battery pack can be communicated with the external space through the first opening 122. In combination with some practical application scenarios, when the pressure inside the battery pack is high, the pressure difference between the inside and the outside of the battery pack can push the valve core assembly 300 to move away from the first opening 122, thereby performing a pressure relief function on the battery pack.

The valve core assembly 300 may or may not have the first opening for balancing the internal pressure and the external pressure of the battery pack, and is not particularly limited herein. For example, when the first opening is not provided in the valve core assembly 300, openings for balancing the internal and external pressures of the battery pack may be provided at other positions of the valve body 100.

The explosion-proof valve provided by the embodiment of the application comprises a valve body 100, a moisture absorption piece 200 and a valve core assembly 300, wherein the valve body 100 is provided with an accommodating cavity 110, a first end face 121 of the valve body 100 is provided with a first opening 122, a second end face 131 of the valve body 100 is provided with a second opening 132, the first opening 122, the accommodating cavity 110 and the second opening 132 are sequentially communicated, the moisture absorption piece 200 is arranged in the accommodating cavity 110, the valve core assembly 300 is connected with the valve body 100, the valve core assembly 300 slides between a first position and a second position relative to the valve body 100, when in the first position, the valve core assembly 300 is covered on the first opening 122, and when in the second position, the valve core assembly 300 is moved away from the first opening 122. In this embodiment, the sliding connection between the valve body 100 and the valve core assembly 300 can realize the process of explosion prevention and pressure relief, when the valve core assembly 300 is moved away from the first opening 122, the moisture absorbing member 200 can absorb moisture entering the accommodating cavity 110, so as to prevent the moisture from damaging components inside the device, such as a battery pack, and meanwhile, when the moisture absorbing member 200 needs to be replaced, the device, such as the battery pack, does not need to be detached, thereby facilitating to improve the replacement efficiency of the moisture absorbing member 200.

Optionally, as shown in fig. 4, the explosion-proof valve further includes a balance valve assembly 400, a third opening 142 is provided on the third end surface 141 of the valve body 100, and the balance valve assembly 400 is fixedly connected with the valve body 100 in the third opening 142.

Also taking the explosion-proof valve as an example of being applied to the battery pack, the balance valve assembly 400 may be a structure for balancing the internal and external pressures of the battery pack. In some examples, the balance valve assembly 400 may be a single valve plate, or may be a structure including a valve seat and a valve plate, and the like, and is not limited herein.

Generally, when the pressure difference between the inside and the outside of the battery pack is small, the valve core assembly 300 can be kept at the first position, and the first opening 122 is kept closed, so that the pressure inside and the pressure outside the battery pack can be balanced through the balance valve assembly 400.

In some possible embodiments, the third end surface 141 and the first end surface 121 of the valve body 100 may be the same end surface or different end surfaces. The third end surface 141 is provided with a third opening 142, and the third opening 142 is communicated with the accommodating chamber 110. The shape of the third opening 142 may be set as desired, and is not particularly limited herein.

The balanced valve assembly 400 may then be fixedly coupled to the valve body 100 in the third opening 142. For example, the balanced valve assembly 400 may include a valve seat and a valve plate, and the valve seat and the valve body 100 may be fixedly connected by welding, snap-fit connection, or other methods. As another example, the balanced valve assembly 400 may include a valve plate that may be directly bonded or snap-fit to the valve body 100.

In this embodiment, the third port 141 of the valve body 100 is provided with the third opening 142, and the balance valve assembly 400 is provided in the third opening 142, so that the internal and external pressures of the explosion-proof valve can be balanced by the balance valve assembly 400 under the condition that the internal pressure difference of the explosion-proof valve is small, thereby improving the safety of the operation of the explosion-proof valve.

Optionally, as shown in fig. 4 and 5, the balance valve assembly 400 includes a valve plate 410, a protection frame 420 fixedly connected to the valve body 100 is disposed in the third opening 142, and the valve plate 410 is disposed on a side of the protection frame 420 far away from the accommodating cavity 110;

the valve sheet 410 includes a valve sheet main body 411 and a movable portion 412 that are movably connected, the valve sheet main body 411 is fixedly connected with the protection frame 420, and a part of the movable portion 412 is attached to the protection frame 420, so that the movable portion 412 moves in a single direction relative to the valve sheet main body 411 in a direction away from the protection frame 420.

In this embodiment, the protection frame 420 may be a structure with a certain rigidity, in some examples, the protection frame 420 may be in a shape like a Chinese character 'tian' or a shape like a Chinese character 'jing', and the specific shape may be set as required, so as to ensure that the accommodating cavity may be communicated with the external environment through the third opening 142.

As for the connection manner of the shield frame 420 and the valve body 100, it may be an integral connection or welding, etc.

The balance valve assembly 400 includes a valve plate 410, and the valve plate 410 may be a silicone valve plate 410 or a rubber valve plate 410, and the like, which is not limited herein.

As shown in fig. 6, the valve sheet 410 may include a valve sheet main body 411 and a movable portion 412, which are movably connected, wherein the valve sheet main body 411 may be fixedly connected to the protection frame 420, for example, fixedly connected to the protection frame 420 by bonding or hot pressing.

The movable portion 412 is movably connected to the valve body 411, and mainly means that the movable portion 412 can move relative to the valve body 411. For example, the valve plate 410 may have a certain elastic or flexible structure, by cutting the valve plate 410, the valve plate 410 is divided into a valve plate main body 411 and a movable portion 412, one end of the movable portion 412 is connected to the valve plate main body 411, and the other end of the movable portion 412 can move relative to the valve plate main body 411, so that the size of the opening of the valve plate 410 changes. For another example, an opening is formed in the valve plate main body 411, the movable portion 412 can be adhered to one side of the opening, and the movable portion 412 moves relative to the valve plate main body 411 to block or avoid the opening.

The valve sheet 410 is disposed on a side of the shield frame 420 far from the accommodating chamber 110, that is, the valve sheet 410 may be disposed on an outer side of the shield frame 420. Part of the movable portion 412 is attached to the protection frame 420, and when the movable portion 412 is subjected to a force from the outside to the inside, for example, when the external pressure of the explosion-proof valve is greater than the internal pressure, the movement of the movable portion 412 toward the accommodating chamber 110 is blocked by the protection frame 420.

When the internal pressure of the explosion proof valve is greater than the external pressure, since the movable portion 412 has a portion exposed in the third opening 142, the internal and external pressure difference may act on the movable portion 412 and push the movable portion 412 to move in a direction away from the shielding frame 420.

In summary, the movable portion 412 of the valve sheet 410 can move in a single direction with respect to the valve sheet main body 411 in a direction away from the shield frame 420, and the balanced valve assembly 400 can be generally regarded as a one-way valve.

Of course, in practical applications, the third opening 142 may be used for air intake and air exhaust in order to balance the pressure difference between the inside and the outside of the explosion-proof valve, and therefore, the balance valve assembly 400 is not an absolute one-way valve. For example, the valve plate main body 411 may be provided with other normally open holes 413; alternatively, the area of the movable portion 412 is smaller than the cross-sectional area of the opening of the valve plate main body 411, so that a normally open gap exists between the movable portion 412 and the hole wall of the valve plate main body 411.

In combination with some examples, when the internal pressure of the explosion-proof valve is greater than the external pressure, the movable portion 412 may move outward, so that the opening area on the valve body is increased and the exhaust rate is increased. And when explosion-proof valve internal pressure is less than external pressure, because the motion of movable part 412 inwards is obstructed, the trompil area in the valve main part remains unchanged, avoids the air intake rate too fast, so, can make moisture absorption piece 200 can fully absorb the moisture in the air that gets into and hold chamber 110, avoid moisture to reach inside for example equipment such as battery package, effectively protect the inside electronic components of equipment such as battery package.

Optionally, as shown in fig. 5, the balance valve assembly 400 further includes a limiting frame 430, and the limiting frame 430 presses the valve sheet main body 411 against the protection frame 420;

the spacing frame 430 has a space for the movable portion 412 to move in one direction.

The limiting frame 430 may have a certain strength, and the valve sheet main body 411 may be disposed between the limiting frame 430 and the protection frame 420. The position-limiting frame 430 and the guard frame 420 may form a fixing to the position of the valve sheet main body 411.

The spacing frame 430 may be circular, rectangular, or other shapes. In one example, the shape of the restraint frame 430 may match the cross-sectional shape of the third opening 142 such that the restraint frame 430 may be nested within the third opening 142. The spacing frame 430 and the valve body 100 may be connected by transition fit, welding or other methods, and is not limited in any way.

The limiting frame 430 may have a certain thickness, so that the limiting frame 430 may enclose a space for the unidirectional movement of the movable portion 412. For example, when the position limiting frame 430 has a rectangular shape, the space may be a cubic space; when the spacing frame 430 is circular, the space may be a cylindrical space or the like.

By arranging the limiting frame 430, the valve sheet main body 411 can be reliably pressed on the protective frame 420, and a corresponding movement space can be provided for the movable part 412, thereby contributing to improving the working reliability of the balanced valve assembly 400.

Optionally, as shown in fig. 2 and 5, the explosion-proof valve further comprises a waterproof, breathable membrane 510 and a bead 520;

the waterproof breathable film 510 and the pressing strip 520 are arranged on one side of the limiting frame 430, which is far away from the valve plate 410, the pressing strip 520 is fixedly connected with the valve body 100, and the waterproof breathable film 510 is pressed on the limiting frame 430 by the pressing strip 520.

The waterproof breathable membrane 510 may allow air to penetrate, but has some waterproof capability. Thus, when the external air enters the accommodating cavity 110 from the third opening 142, the moisture can be isolated by the waterproof breathable film 510, so as to reduce the moisture content reaching the accommodating cavity 110, thereby also contributing to the improvement of the service life of the absorbent member 200.

As for the bead 520, a structure having a certain strength may be used, and the specific shape may be a rectangle, a field, or other shapes, which are not limited herein.

The waterproof breathable film 510 can be pressed on one side of the limiting frame 430 far away from the valve plate 410 through the pressing strip 520. For example, the pressing strip 520 may be embedded in the third opening 142, and the peripheral edge of the waterproof breathable film 510 may be fixed between the pressing strip 520 and the limiting frame 430.

In some examples, the waterproof air-permeable membrane 510 may be further fixed to the limiting frame 430 or the pressing strip 520 by bonding or the like, so as to improve the installation reliability of the waterproof air-permeable membrane 510.

Alternatively, as shown in fig. 3 and 4, the valve body 100 includes a main body portion 151 and a boss portion 152, the boss portion 152 being fixedly coupled to a circumferential surface of the main body portion 151;

the first end surface 121 and the second end surface 131 are opposite end surfaces of the body portion 151 in the height direction, the peripheral surface of the body portion 151 is located between the first end surface 121 and the second end surface 131, and the third end surface 141 is an end surface of the boss portion 152 away from the body portion 151.

As shown in fig. 2 and 4, the body portion 151 of the valve body 100 may be entirely cylindrical or truncated cone-shaped, the first end surface 121 and the second end surface 131 may be two end surfaces facing each other in the height direction of the body portion 151, and a circumferential surface may be present between the first end surface 121 and the second end surface 131.

The boss portion 152 may be connected to the peripheral surface of the main body portion 151, and the connection may be integrally connected or welded, and the like, which is not limited herein.

The third end surface 141 is an end surface of the boss portion 152 away from the body portion 151, that is, the third opening 142 may be provided in the boss portion 152.

In this embodiment, the boss portion 152 is disposed to enable the third opening 142 to have a larger axial length, so as to facilitate assembly of components such as the balanced valve assembly 400 in the third opening 142.

Meanwhile, the first opening 122 and the third opening 142 are located on different end surfaces of the valve body 100, and accordingly, a structure for balancing internal and external air pressures in a conventional working condition and a structure for explosion-proof pressure relief can be arranged relatively independently, which is beneficial to reducing the design and manufacturing difficulty of the explosion-proof valve.

Alternatively, as shown in fig. 4, the valve body 100 includes a main body part 151 and a guide part 153, the receiving cavity 110 is located in the main body part 151, and the guide part 153 is fixedly connected with the main body part 151 in the receiving cavity 110; the valve core assembly 300 is slidably coupled to the guide 153.

The valve body 100 may include a main body 151 and a guide 153, wherein the receiving cavity 110 may be located in the main body 151.

The guide part 153 may be disposed in the receiving cavity 110, and at the same time, the guide part 153 may be fixedly connected with the body part 151. For example, the guide portion 153 and the main body portion 151 may be integrally connected or fixed by welding.

The guide 153 is slidably connected to the valve core assembly 300, and the guide 153 can provide a guide for the movement of the valve core assembly 300. For example, the guide portion 153 may be provided with a guide hole or a guide groove, and the valve core assembly 300 may be slidably connected to the guide hole or the guide groove.

In this embodiment, the valve body 100 includes a guide 153, and the guide 153 can be used to provide guidance for movement of the poppet assembly 300, thereby facilitating reliability of movement of the poppet assembly 300 between the first and second positions.

Optionally, as shown in fig. 4, the valve core assembly 300 includes a push rod 310, a cover plate 320 and an elastic member 330, wherein the push rod 310 is fixedly connected with the cover plate 320;

the guide portion 153 has a guide hole, the push rod 310 is slidably connected to the guide hole, two ends of the elastic member 330 are respectively connected to the guide portion 153 and the push rod 310, when the elastic member 330 is in a release state, the valve core assembly 300 is located at the first position, and the cover plate 320 covers the first opening 122.

The push rod 310 and the cover plate 320 may be rigid structures, and they may be fixedly connected. In some examples, the push rod 310 and the cover plate 320 may be fixed by welding, screwing, or fastening.

The shape of the guide hole of the guide 153 is not particularly limited, and may be, for example, a circle, a rectangle, or the like, and the cross-sectional shape of the push rod 310 may be matched with each other.

The elastic member 330 may be a spring, an elastic sheet, or the like, and is not particularly limited herein. Taking the elastic member 330 as a spring as an example, as shown in fig. 4, two ends of the spring may be respectively connected to the guide portion 153 and the push rod 310, and when the spring is in a released state, a downward force may be generated on the push rod 310 and the end cap, so that the end cap covers the first opening 122. At this point, it corresponds to the valve core assembly 300 being in the first position.

When the pressure inside the accommodating cavity 110 is relatively high, the internal and external pressure difference acts on the end cap, an upward thrust is generated on the end cap, the internal and external pressure difference enables the thrust to overcome the elasticity of the elastic member 330, the end cap is ejected out, the first opening 122 is exposed, and therefore the explosion-proof and pressure relief effects are achieved.

When the pressure in the receiving chamber 110 is released to a lower value, the valve core assembly 300 moves downward by the resilience of the elastic member 330, and the end cover can be re-covered at the first opening 122.

In this embodiment, the valve core assembly 300 includes a push rod 310, a cover plate 320 and an elastic member 330, and the push rod 310 is slidably connected to a guide hole formed in the guide portion 153, so as to limit the movement direction of the valve core assembly 300 in the axial direction of the push rod 310. The elastic member 330 can stably cover the end cap on the first opening 122 when the pressure in the accommodating cavity 110 is low, thereby improving the working reliability of the explosion-proof valve.

In one example, the first opening 122 may be a stepped bore formed in the first end face 121, and when the cartridge assembly 300 is in the first position, the peripheral edge of the end cover may abut against the stepped bore. In another example, a sealing ring may be further disposed between the end cover and the step surface to ensure that the end cover can reliably close the first opening 122 when the valve core assembly 300 is in the first position.

Optionally, as shown in fig. 4, the valve body further includes a limiting portion 155, the limiting portion 155 is fixedly connected with the main body 151 in the accommodating cavity 110, and the limiting portion 155 presses the absorbent member 200 on the inner wall of the accommodating cavity 110.

The stopper 155 and the body 151 may be integrally connected or fixed by welding, and the like, and is not particularly limited herein.

The number of the stopper 155 may be one or more. The position limiting part 155 and the inner wall of the accommodating cavity 110 can be arranged oppositely, so that a space for placing the absorbent member 200 is formed between the position limiting part 155 and the inner wall of the accommodating cavity 110.

As shown in fig. 4, in combination with a specific application example, the absorbent member 200 may be inserted into the accommodating chamber 110 from the second opening 132 of the valve body 100, and one end of the absorbent member 200 may be snapped into a space between the position-limiting portion 155 and the inner wall of the accommodating chamber 110, so that the absorbent member 200 is reliably positioned in the accommodating chamber 110.

In this embodiment, the limiting portion 155 is provided to facilitate better fixation between the moisture absorbing member 200 and the valve body 100, thereby improving the stability of the overall structure of the explosion-proof valve.

In some embodiments, the guide portion 153 and the limiting portion 155 can be used together to press the absorbent member 200 against the inner wall of the accommodating chamber 110.

Alternatively, as shown in fig. 4, the absorbent member 200 may be arranged around the push rod 310, so as to ensure the movement space of the push rod 310 in the axial direction and avoid the absorbent member 200 interfering with the movement of the push rod.

In combination with the above example, the absorbent member 200 may be formed by bonding binder resin and absorbent, and the whole absorbent member has a relatively fixed shape, and an axial through hole is formed in the absorbent member 200, and the push rod 310 extends into the through hole, so as to achieve the effect of arranging the absorbent member 200 around the push rod 310. The shape of the through-hole in the absorbent member 200 may be cylindrical, conical, etc., and is not particularly limited thereto.

Of course, the absorbent member 200 may also include a porous container and a moisture absorbent, and moisture can be absorbed by the moisture absorbent inside the porous container through the openings of the porous container. Accordingly, it is possible to fix the porous container to the circumferential inner wall of the receiving chamber 110 and fill the moisture absorbent into the porous container such that the moisture absorbent member 200 is surrounded around the push rod 310.

Optionally, as shown in fig. 4, the explosion-proof valve further comprises a tray 600, and the tray 600 is fixedly connected with the valve body 100 at the second opening 132.

The tray 600 may be a structure having a certain strength and fixedly coupled to the valve body 100 at the second opening 132. The connection manner of the tray 600 and the valve body 100 may be welding, snap connection, adhesion, or fastener connection, and is not limited herein.

The shape of the tray 600 may be designed as desired, and in some examples, the shape of the tray 600 may be matched to the shape of the second opening 132.

Since the second opening 132 is used to communicate with the interior space of a type of device, such as a battery pack, the tray 600 may have an opening therein to avoid completely closing the second opening 132. The number of the openings on the tray 600 may be one or more, and the shape of the openings may be at least one of a rectangle, an arc, and a circle, which are not specifically limited herein.

In this embodiment, the tray 600 is disposed at the second opening 132 to connect with the valve body 100, so that the structure of the moisture absorbing member 200 can be confined in the accommodating chamber 110, and the stability of the whole structure of the explosion-proof valve can be improved.

Alternatively, as shown in fig. 2 and 4, a skirt 160 is provided on a side of the body portion 151 of the valve body 100 adjacent to the second opening 132, and the skirt 160 is provided around the body portion 151. When the explosion proof valve is assembled with a device such as a battery pack, the skirt 160 may contact the battery pack and be fixedly attached to the battery pack by fasteners, welding, or the like.

In some examples, the side of the skirt 160 adjacent to the second opening 132 is configured with a sealing ring, which is effective to ensure the sealing performance after the explosion-proof valve and the battery pack are assembled together.

In accordance with the embodiments of the present application as set forth above, these embodiments are not exhaustive or limit the embodiments to the precise embodiments of the application. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims

1. An explosion-proof valve, comprising:

the valve comprises a valve body, a valve body and a valve body, wherein an accommodating cavity is formed in the valve body, a first opening is formed in a first end face of the valve body, a second opening is formed in a second end face of the valve body, and the first opening, the accommodating cavity and the second opening are communicated in sequence;

an absorbent member disposed in the receiving cavity;

the valve core assembly is connected with the valve body and slides between a first position and a second position relative to the valve body, the valve core assembly is covered on the first opening when in the first position, and the valve core assembly is removed from the first opening when in the second position.

2. The explosion proof valve of claim 1 further comprising a counterbalance valve assembly, wherein a third opening is provided in a third end surface of the valve body, the third opening communicating with the receiving chamber, the counterbalance valve assembly being fixedly connected to the valve body in the third opening.

3. The explosion-proof valve of claim 2, wherein the balance valve assembly comprises a valve plate, a protective frame fixedly connected with the valve body is arranged in the third opening, and the valve plate is arranged on one side of the protective frame far away from the accommodating cavity;

the valve block comprises a valve block main body and a movable part which are movably connected, the valve block main body is fixedly connected with the protection frame, part of the movable part is attached to the protection frame, and the movable part moves in a single direction relative to the valve block main body in the direction away from the protection frame.

4. The explosion proof valve of claim 3 wherein the balanced valve assembly further comprises a retainer frame that compresses the valve plate body against the guard frame;

the limiting frame is provided with a space for the unidirectional movement of the movable part.

5. The explosion proof valve of claim 4 further comprising a waterproof vent membrane and a bead;

6. The explosion proof valve as recited in any one of claims 2 to 5 wherein the valve body includes a main body portion and a boss portion fixedly attached to a peripheral surface of the main body portion;

7. The explosion proof valve of claim 1 wherein said valve body includes a main body portion and a pilot portion, said receiving chamber being located in said main body portion, said pilot portion being fixedly connected to said main body portion in said receiving chamber; the valve core assembly is connected with the guide part in a sliding mode.

8. The explosion proof valve of claim 7 wherein the valve core assembly includes a push rod, a cover plate and an elastic member, the push rod is fixedly connected with the cover plate;

the guide part is provided with a guide hole, the push rod is connected in the guide hole in a sliding mode, two ends of the elastic piece are connected to the guide part and the push rod respectively, the valve core assembly is located at the first position when the elastic piece is in a release state, and the cover plate is covered on the first opening.

9. The explosion-proof valve of claim 8 wherein said valve body further comprises a limiting portion fixedly connected to said main body portion in said receiving chamber, said limiting portion pressing said absorbent member against the inner wall of said receiving chamber.

10. The explosion proof valve of claim 1 further comprising a tray fixedly attached to the valve body at the second opening.