CN214898752U

CN214898752U - Ventilation explosion-proof valve for pressure relief of battery PACK box closed space

Info

Publication number: CN214898752U
Application number: CN202120702008.8U
Authority: CN
Inventors: 李涤烽; 宋海民; 仇培清
Original assignee: Panasian Microvent Tech Jiangsu Corp
Current assignee: Panasian Microvent Tech Jiangsu Corp
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-11-26
Anticipated expiration: 2031-04-07

Abstract

The utility model belongs to the technical field of the battery explosion-proof, a battery PACK box airtight space pressure release is with ventilative explosion-proof valve is related to, the pressure-proof valve comprises a valve seat, the disk seat top is equipped with the valve gap, and the below is equipped with and treats the helicitic texture of pressure release spatial connection, helicitic texture and treat to realize sealing connection through the sealing washer between the pressure release space, be equipped with baffle layer and thin layer on the disk seat pressure release route, the metal sheet is chooseed for use on the baffle layer, it has a plurality of through-holes to gather on the metal sheet, the thin layer sets up the top on the baffle layer, the thin layer is including blasting film and ventilative film. The utility model has reasonable design, through the design of the blasting film and the breathable film, when the pressure in the battery PACK box or other closed spaces is lower than the set limit value, the breathable film plays a role in waterproof and breathable, and the purpose of pressure balance can be realized; when the pressure in the battery PACK box or other closed spaces is higher than a set limit value, the blasting film can be broken from the middle, so that the aim of quickly relieving pressure can be fulfilled.

Description

Ventilation explosion-proof valve for pressure relief of battery PACK box closed space

Technical Field

The utility model belongs to the technical field of the battery is explosion-proof, concretely relates to airtight space pressure release of battery PACK case is with ventilative explosion-proof valve.

Background

The battery is the most critical composition in the new energy automobile, and in the use process of the battery pack, when components in the battery pack are abnormal, the internal pressure is increased rapidly and exceeds a safety limit value, so that the use safety of the battery is affected, and therefore the rapidly increased pressure needs to be released rapidly.

The traditional technical means is that an explosion-proof structure formed by combining a metal film and an explosion-proof needle is utilized, and the explosion-proof needle is used for puncturing the metal film which is bulged due to overlarge internal pressure, so that the purpose of pressure relief is achieved. However, the metal film usually first appears a small hole after contacting the explosion-proof needle, and the explosion needs a period of time to occur, so that time lag occurs, and the quick pressure relief effect is not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defect and not enough that exist among the prior art, the airtight space pressure release of battery PACK case that can enough balance the internal and external pressure of battery package and can quick pressure release is with ventilative explosion-proof valve of design.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a battery PACK case airtight space pressure release is with ventilative explosion-proof valve, includes the disk seat, be equipped with baffle layer and thin layer on the disk seat pressure release route, the thin layer includes blasting film and ventilative film.

Preferably, a valve cover is arranged above the valve seat, a threaded structure connected with the space to be decompressed is arranged below the valve seat, and the threaded structure is connected with the space to be decompressed in a sealing mode through a sealing ring.

Preferably, the valve seat and the valve cover are both plastic parts.

Preferably, the partition plate layer is a metal plate, and a plurality of through holes are densely distributed in the metal plate.

Preferably, the membrane layer is disposed over the separator layer.

Preferably, the blasting thin film and the valve seat are coaxially arranged, and the breathable thin films are symmetrically arranged on the left side and the right side of the blasting thin film.

Preferably, the blasting film and the breathable film are fixedly connected with the valve seat through welding, the welding is hot melting welding or ultrasonic welding, and the width range of welding ribs formed by welding is 0.1-0.6 mm.

Preferably, the blasting film is a PE film, a PET film or a PU film, and the thickness range of the blasting film is 0.1-0.5 mm.

Preferably, the breathable film is an expanded polytetrafluoroethylene film ePTFE, a PU non-woven fabric film, a PE porous film, a cellulose acetate film, a ceramic microporous film or an electrostatic spinning non-woven fabric, and the thickness range of the breathable film is 0.1-0.5 mm.

After the technical scheme is adopted, the utility model provides a pair of battery PACK box airtight space pressure release is with ventilative explosion-proof valve has following beneficial effect:

through the design of the blasting film and the breathable film, when the pressure in the sealed space of the battery PACK box is lower than a set limit value, the breathable film plays a role in water resistance and ventilation, and the purpose of pressure balance can be realized; when the pressure in the closed space of the battery PACK box is higher than a set limit value, the blasting film is broken from the middle, so that the aim of rapid pressure relief can be fulfilled; through the design of the partition plate layer, foreign matters in the sealed space of the battery PACK box can be prevented from being sprayed out; through the design of the width of the welding rib and the thickness parameter of the thin film layer, the reasonable design and excellent performance of the explosion-proof valve can be ensured; through the design of sealing washer, can guarantee the leakproofness of being connected between explosion-proof valve and the battery PACK case airtight space.

Drawings

FIG. 1 is a top view of the venting explosion-proof valve for pressure relief of a sealed space of a battery PACK box of the present invention;

fig. 2 is the utility model relates to a battery PACK case airtight space pressure release is with inner structure cross-sectional view of ventilative explosion-proof valve.

Wherein: the valve comprises a valve seat 1, a partition plate layer 2, an explosion film 3, a breathable film 4, a valve cover 5, a sealing ring 6 and a through hole 7.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The utility model relates to a battery PACK case airtight space pressure release is with ventilative explosion-proof valve, as shown in FIG. 1-2, including disk seat 1, 1 top of disk seat is equipped with valve gap 5, and the below is equipped with and treats the helicitic texture of pressure release space connection, helicitic texture with treat and realize sealing connection through sealing washer 6 between the pressure release space, disk seat 1 and valve gap 5 are the working of plastics.

Be equipped with baffle layer 2 and thin layer on the 1 pressure release route of disk seat, the thin layer sets up the top at baffle layer 2, the metal sheet is chooseed for use on baffle layer 2, it has a plurality of through-holes 7 to gather on the metal sheet for prevent to treat the foreign matter blowout in the pressure release space, the thin layer includes blasting film 3 and ventilative film 4, blasting film 3 sets up with disk seat 1 is coaxial, ventilative film 4 symmetry sets up the left and right sides at blasting film 3.

Further, the blasting film 3 and the breathable film 4 are fixedly connected with the valve seat 1 in a welding mode, the welding mode is hot melting welding or ultrasonic welding, the width of a welding rib formed by welding is adjusted according to different pressure requirements, and the preferable width range is 0.1-0.6 mm.

Further, the blasting film 3 is an air-impermeable film with a thickness ranging from 0.1 mm to 0.5mm, and the air-impermeable film comprises a PE film, a PET film or a PU film.

Further, the breathable film 4 is a breathable film with a thickness range of 0.1-0.5mm, and the breathable film comprises an expanded polytetrafluoroethylene film ePTFE, a PU non-woven fabric film, a PE porous film, a cellulose acetate film, a ceramic microporous film or an electrostatic spinning non-woven fabric.

To sum up, the breathable explosion-proof valve for pressure relief of the sealed space of the battery PACK box, provided by the utility model, has reasonable structural design, and when the pressure in the sealed space of the battery PACK box is lower than a set limit value, the breathable film 4 plays a role in waterproof and breathable, so that the purpose of pressure balance can be realized; when the pressure in the closed space of the battery PACK box is higher than a set limit value, the blasting film 3 can be broken from the middle, so that the aim of quickly relieving pressure can be fulfilled.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a battery PACK case airtight space pressure release is with ventilative explosion-proof valve, includes disk seat (1), its characterized in that: a partition plate layer (2) and a thin film layer are arranged on a pressure release path of the valve seat (1), and the thin film layer comprises an explosion film (3) and a breathable film (4).

2. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 1, characterized by: valve seat (1) top is equipped with valve gap (5), the below be equipped with treat the helicitic texture that the pressure release space is connected, helicitic texture with treat and realize sealing connection through sealing washer (6) between the pressure release space.

3. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 2, characterized in that: the valve seat (1) and the valve cover (5) are both plastic parts.

4. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 1, characterized by: the partition plate layer (2) is made of a metal plate, and a plurality of through holes (7) are densely distributed in the metal plate.

5. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 1, characterized by: the thin film layer is arranged above the separator layer (2).

6. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 1, characterized by: the explosion film (3) and the valve seat (1) are coaxially arranged, and the breathable films (4) are symmetrically arranged on the left side and the right side of the explosion film (3).

7. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 1, characterized by: the explosion film (3), the breathable film (4) and the valve seat (1) are fixedly connected in a welding mode, the welding mode is hot melting welding or ultrasonic welding, and the width range of welding ribs formed by welding is 0.1-0.6 mm.

8. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 1, characterized by: the blasting film (3) adopts a PE film, a PET film or a PU film, and the thickness range of the blasting film (3) is 0.1-0.5 mm.

9. The battery PACK box airtight space pressure release is with ventilative explosion-proof valve of claim 1, characterized by: the breathable film (4) is an expanded polytetrafluoroethylene film ePTFE, a PU non-woven fabric film, a PE porous film, a cellulose acetate film, a ceramic microporous film or an electrostatic spinning non-woven fabric, and the thickness range of the breathable film (4) is 0.1-0.5 mm.