An umbrella-type explosion-proof valve

Abstract

The utility model discloses an umbrella-type explosion-proof valve, comprising a bracket base, a sealing ring is installed on the outer side of the bracket base, an inner cavity and an outer cavity are respectively arranged on both sides of the bracket base, an umbrella valve installation hole and a plurality of pressure relief grooves are arranged between the inner cavity and the outer cavity, the umbrella valve is installed in the umbrella valve installation hole and the umbrella valve covers the pressure relief groove, the umbrella valve and the bracket base are arranged coaxially, a pressure relief guide arc is arranged on the side of the umbrella valve facing the pressure relief groove relative to the pressure relief groove, and an airflow is guided outward from the bottom of the valve flap door, and a plurality of exhaust grooves for communicating with the outer cavity are arranged on the bracket base, and the internal high-temperature airflow is made to flow out quickly along the guide direction through the pressure relief groove, so as to achieve the effect of rapid pressure relief, and at the same time, the explosion point pressure is low and the leakage flow is high.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof valves, in particular to an umbrella-shaped explosion-proof valve. Background Art

[0002] With the development of technology, batteries are widely used in electric vehicles, electric bicycles, portable energy storage, industrial energy storage, electric motorcycles, vacuum cleaners and other technological products. The safety of battery use is also related to human life safety. During the design, assembly, storage, transportation and use of batteries, they may be exposed to extreme environments and violent abuse. Due to the high energy density ratio of new energy power batteries, during the use of the battery pack, once the internal battery cell is affected by external influences and short-circuits, it may cause thermal runaway and generate a large amount of high-temperature gas and flames, causing the internal pressure to increase sharply and exceed the safety limit, affecting the safety of battery use. If it cannot be dredged and discharged in time, it will cause more serious battery combustion or even fire accidents. Therefore, the sharply increased pressure inside the battery pack needs to be quickly released. In the prior art, such as patent CN209747617U, a balanced explosion-proof valve with built-in umbrella-shaped blasting repair type, discloses that when there is an abnormality inside the battery pack and the internal pressure increases, the sealing part of the soft rubber sealing sleeve and the valve body with interference fit is opened to form a gap between the sealing part and the annular part of the valve body. At this time, the inside of the battery pack is directly in contact with the outside through the gap to quickly release the pressure. However, the soft rubber sealing sleeve is arranged in the pressure cover, and the explosion-proof valve is not provided with a better guide structure for guiding the internal pressure outward, which is not conducive to further improving the efficiency of rapid pressure relief. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide an umbrella-type explosion-proof valve.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An umbrella-type explosion-proof valve comprises a support base, a sealing ring is installed on the outside of the support base, an inner cavity and an outer cavity are respectively arranged on both sides of the support base, an umbrella valve mounting hole and a plurality of pressure relief grooves are arranged between the inner cavity and the outer cavity, the umbrella valve is installed in the umbrella valve mounting hole and the umbrella valve covers the pressure relief groove, the umbrella valve is arranged coaxially with the support base, a pressure relief guide arc is arranged on the side of the umbrella valve facing the pressure relief groove relative to the pressure relief groove, and a plurality of exhaust through grooves for connecting with the outer cavity are arranged on the support base.

[0006] In certain embodiments of the utility model, the umbrella valve includes a valve seat, and a valve flap door and a stop cone are respectively connected to both ends of the valve seat. The valve seat is installed in the umbrella valve mounting hole and the stop cone and the umbrella valve mounting hole form a buckling structure. The valve flap door covers the pressure relief groove, and the pressure relief guide arc is arranged on the inner side of the valve flap door.

[0007] In certain embodiments of the utility model, the valve seat comprises a mounting seat, and a connecting column for connecting to a stop cone is disposed at the lower end of the mounting seat.

[0008] In certain embodiments of the utility model, an end face recess is provided on the side of the bracket base facing the outer cavity, the end face recess includes a mounting recess recessed corresponding to the mounting seat, an inclined recess is connected to the outside of the mounting recess, the pressure relief groove is circumferentially arranged along the outside of the umbrella valve mounting hole, and the pressure relief groove is arranged in the inclined recess.

[0009] In certain embodiments of the present invention, an annular sealing portion is arranged at the edge of the valve flap door.

[0010] In certain embodiments of the present invention, a sealing groove is provided on the outer side of the bracket base, and a sealing ring is installed in the sealing groove.

[0011] In certain embodiments of the utility model, the inner cavity and the sealing groove are arranged at the lower part of the bracket base, and the outer cavity is arranged at the upper part of the bracket base.

[0012] In some embodiments of the present invention, a mounting guide angle is provided along the edge of the lower end of the bracket base.

[0013] In some embodiments of the present invention, the umbrella valve is made of elastic material.

[0014] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Through the pressure relief groove, pressure relief guide arc and exhaust groove, the internal high-temperature airflow can flow out quickly along the guide direction to achieve the effect of rapid pressure relief. At the same time, the detonation point pressure is low and the leakage flow is high. The pressure and high-temperature gas can be quickly released within 10 seconds, effectively preventing the battery combustion from spreading.

[0016] 2. The umbrella-type explosion-proof valve has a simple structure and is equipped with an installation guide angle for easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 A schematic diagram of a support base of the utility model;

[0020] Figure 3 It is a schematic diagram of the umbrella valve of the utility model;

[0021] Figure 4 It is a cross-sectional view of the umbrella valve of the utility model;

[0022] Description of main reference numerals:

[0023] 1. Bracket base, 10. Sealing ring, 11. Sealing groove, 12. Umbrella valve mounting hole, 13. Pressure relief groove, 14. Mounting recess, 15. Inclined recess, 16. Mounting guide angle, 2. Inner cavity, 3. Outer cavity, 30. Exhaust groove, 4. Umbrella valve, 40. Pressure relief guide arc, 41. Valve seat, 410. Mounting seat, 42. Valve flap door, 420. Annular sealing portion, 43. Stop cone. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0026] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the invention.

[0027] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0028] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0029] See also Figure 1-4 :

[0030] An umbrella-type explosion-proof valve includes a bracket base 1, and a sealing ring 10 is installed on the outside of the bracket base 1. As an implementation mode, a sealing groove 11 is provided on the outside of the bracket base 1, and the sealing ring 10 is installed in the sealing groove 11 to fill the gap between the bracket base 1 and the assembly hole of the battery pack shell to ensure that water vapor does not penetrate from the assembly position, thereby playing a waterproof role. Preferably, the sealing ring 10 adopts an O-ring, which is made of soft elastic materials such as EPDM, silicone rubber, and nitrile rubber.

[0031] An inner cavity 2 and an outer cavity 3 are respectively provided on both sides of the support base 1, an umbrella valve mounting hole 12 and a plurality of pressure relief grooves 13 are provided between the inner cavity 2 and the outer cavity 3, an umbrella valve 4 is installed in the umbrella valve mounting hole 12 and the umbrella valve 4 covers the pressure relief groove 13, the umbrella valve 4 is coaxially arranged with the support base 1, and the pressure relief groove 13 is circumferentially arranged along the outer side of the umbrella valve mounting hole 12;

[0032] A pressure relief guide arc 40 is provided on one side of the umbrella valve 4 facing the pressure relief groove 13 relative to the pressure relief groove 13 located below, so as to guide the airflow outward from the bottom of the umbrella valve 4. A plurality of exhaust grooves 30 for connecting to the outer cavity 3 are provided on the bracket base 1, so that the guided airflow flows out from the exhaust grooves 30, which is beneficial to improve the pressure relief speed.

[0033] As an implementation mode, the umbrella valve 4 includes a valve seat 41, and the two ends of the valve seat 41 are respectively connected to a valve flap door 42 and a stop cone 43, the valve seat 41 is installed in the umbrella valve mounting hole 12 and the stop cone 43 and the umbrella valve mounting hole 12 form a buckling structure to ensure that the umbrella valve 4 will not fall off; further, the umbrella valve 4 is made of silicone rubber elastic material with low compression deformation, high tensile force, and weather aging resistance; the valve flap door 42 covers the pressure relief groove 13, and the pressure relief guide arc 40 is arranged on the inner side of the valve flap door 42, so that the high-pressure airflow inside the battery pack flows out from the pressure relief groove 13 and then flows out toward the lateral exhaust groove 30 along the pressure relief guide arc 40.

[0034] As an embodiment, the valve seat 41 includes a mounting seat 410, and a connecting column for connecting the stop cone 43 is provided at the lower end of the mounting seat 410. The bracket base 1 is provided with an end face recess on the side facing the outer cavity 3, and the end face recess includes a mounting recess 14 that is recessed corresponding to the mounting seat 410, and the umbrella valve mounting hole 12 is provided at the center of the mounting recess 14. The outer side of the mounting recess 14 is connected to an annular inclined recess 15, and the pressure relief groove 13 is provided along the outer side of the umbrella valve mounting hole 12. The pressure relief groove 13 is provided in the inclined recess 15, and an exhaust guide cavity with a larger inner part and a smaller outer part is formed between the inclined recess 15 and the pressure relief guide arc 40, which is conducive to guiding the outflow of airflow and quickly releasing pressure. In some other embodiments, the mounting seat 410 and the connecting column are provided with vertical outward openings, which are conducive to the compression deformation of the valve seat 41 when it is under pressure.

[0035] In some embodiments, the pressure relief groove 13 is configured as an arc-shaped groove.

[0036] As an implementation mode, an annular sealing portion 420 is provided at the lower edge of the valve flap door 42. When the valve flap door 42 is closed, the annular sealing portion 420 is tightly attached to the bracket base 1, so that the umbrella-type explosion-proof valve is in a closed state, forming a sealing structure.

[0037] As an implementation mode, the inner cavity 2 and the sealing groove 11 are arranged at the lower part of the bracket base 1, and the outer cavity 3 is arranged at the upper part of the bracket base 1. The lower end of the bracket base 1 is provided with an installation guide angle 16 along the edge. The installation guide angle 16 is located below the sealing groove 11. The installation guide angle 16 is used as an installation guide for the umbrella-type explosion-proof valve, which is convenient for installation and makes the assembly process faster.

[0038] Under normal circumstances, when the pressure in the battery pack or the enclosed space is lower than the set limit, the elastic umbrella valve 4 is used to seal between the bracket base 1 and the installation medium. When the pressure in the battery pack or the enclosed space is higher than the set limit, the elastic umbrella valve 4 is deformed and opened quickly under the internal pressure drive. The umbrella valve 4 opens and directly connects with the outside air. The internal high-temperature airflow flows out quickly along the pressure relief groove 13, the pressure relief guide arc 40, and the exhaust groove 30 to achieve the effect of rapid pressure relief. In some other embodiments, according to the use requirements, the valve body is set to open the pressure within 3kpa to ensure that the battery is opened under a relatively small pressure, the detonation point pressure is low, and the leakage flow rate is high. It can quickly release more than 12L of pressure and high-temperature gas within 10 seconds to prevent the battery from burning and spreading.

[0039] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. An umbrella-type explosion-proof valve, characterized in that: It includes a bracket base, a sealing ring is installed on the outside of the bracket base, an inner cavity and an outer cavity are respectively arranged on both sides of the bracket base, an umbrella valve mounting hole and a plurality of pressure relief grooves are arranged between the inner cavity and the outer cavity, the umbrella valve is installed in the umbrella valve mounting hole and the umbrella valve covers the pressure relief groove, the umbrella valve is coaxially arranged with the bracket base, a pressure relief guide arc is arranged on the side of the umbrella valve facing the pressure relief groove relative to the pressure relief groove, and a plurality of exhaust grooves for connecting with the outer cavity are arranged on the bracket base.

2. The umbrella-type explosion-proof valve according to claim 1, characterized in that: The umbrella valve includes a valve seat, with valve flap doors and stop cones connected to both ends of the valve seat respectively. The valve seat is installed in the umbrella valve mounting hole so that the stop cone and the umbrella valve mounting hole form a buckling structure. The valve flap door covers the pressure relief groove, and the pressure relief guide arc is arranged on the inner side of the valve flap door.

3. The umbrella-type explosion-proof valve according to claim 2, characterized in that: The valve seat comprises a mounting seat, and a connecting column for connecting a stop cone is arranged at the lower end of the mounting seat.

4. The umbrella-type explosion-proof valve according to claim 3, characterized in that: The bracket base is provided with an end face recess on the side facing the outer cavity, the end face recess includes a mounting recess corresponding to the mounting seat, the outer side of the mounting recess is connected with an inclined recess, the pressure relief groove is circumferentially arranged along the outer side of the umbrella valve mounting hole, and the pressure relief groove is arranged in the inclined recess.

5. The umbrella-type explosion-proof valve according to claim 2, characterized in that: An annular sealing portion is arranged at the edge of the valve flap door.

6. The umbrella-type explosion-proof valve according to claim 1, characterized in that: A sealing groove is arranged on the outer side of the bracket base, and a sealing ring is installed in the sealing groove.

7. The umbrella-type explosion-proof valve according to claim 6, characterized in that: The inner cavity and the sealing groove are arranged at the lower part of the support base, and the outer cavity is arranged at the upper part of the support base.

8. The umbrella-type explosion-proof valve according to claim 7, characterized in that: The lower end of the support base is provided with an installation guide angle along the edge.

9. An umbrella-type explosion-proof valve according to any one of claims 1 to 8, characterized in that: The umbrella valve is made of elastic material.

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