Humidifying explosion-proof valve

Abstract

The utility model discloses a humidity-adjusting explosion-proof valve in the field of explosion-proof valves, which comprises a valve body, a protective cover and a fixed seat, the valve body is provided with a guide rod penetrating through the valve body and a spring arranged between the guide rod and the valve body, the spring is used for providing elastic force for the guide rod along the direction of the valve body all the time, a through hole is arranged in the fixed seat, and the through hole is communicated with the guide rod. The fixing base is provided with a first containing cavity and a second containing cavity with upward openings, the first containing cavity is communicated with the second containing cavity, the second containing cavity is communicated with the through hole, and a breathable film used for blocking the through hole is arranged in the first containing cavity. A humidity adjusting piece used for blocking the through hole is arranged in the second containing cavity. According to the humidity-adjusting explosion-proof valve disclosed by the utility model, external moisture is effectively prevented from entering through the laminated arrangement of the breathable film and the humidity-adjusting sheet, internal moisture is absorbed through the humidity-adjusting sheet, the external moisture is blocked bidirectionally through the breathable film, and faults such as electrical short circuit and the like in a battery pack and a box caused by a water condensation phenomenon are prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of explosion-proof valve, concretely is humidification explosion-proof valve. BACKGROUND

[0002] The safe and reliable work of core components such as battery PACK, electric control and motor in the power system of electric vehicle is crucial. In order to ensure its safe and stable work, waterproof and dustproof need to be achieved, that is, sealing state needs to be achieved in theory, but in the sealing state, a large amount of high-temperature mixed gas containing solid or colloidal substances will be generated if the power battery is short-circuited and thermal runaway, and if it cannot be discharged in time, severe fire and explosion will occur under normal circumstances, causing serious casualties and property losses. Therefore, the existing technical solution at present is to install a waterproof and breathable explosion-proof balance valve (commonly known as an explosion-proof valve) on the battery pack to meet the waterproof and explosion-proof requirements of the power battery system. The explosion-proof valve is an important safety protection device, which is widely used in systems containing flammable gas or substances to prevent the system from exploding due to excessive internal pressure. It is usually installed in the high-pressure part of the system, and when the internal pressure of the system exceeds the set value, the explosion-proof valve will automatically open to release the internal pressure and protect the system. In the power system of electric vehicles, the explosion-proof valve is mainly used for the safety protection of the battery pack. When a large amount of gas is generated inside the battery due to overpressure or abnormal temperature rise, the explosion-proof valve will automatically open to release the internal pressure and prevent the battery from exploding.

[0003] The existing explosion-proof valve still has the following defects: the design of the existing explosion-proof valve mainly focuses on the release of pressure and explosion-proof function, and ignores the absorption and discharge of moisture. In the power system of electric vehicles, the core components such as battery pack need to maintain a dry environment to prevent electrical short circuit and other faults. However, the existing explosion-proof valve usually only has one-way air permeability function and cannot effectively absorb and discharge the moisture inside the battery pack, so that the moisture accumulates in the battery pack, increasing the risk of electrical faults. In addition, the explosion-proof valve is installed on the battery pack during use and achieves waterproof and air permeability through a waterproof and breathable membrane. Although the waterproof and breathable membrane can prevent liquid water from entering the battery pack, it cannot prevent moisture in the air from entering the battery pack. When a large amount of moisture enters, it will cause the phenomenon of electrical short circuit and other faults in the battery pack and the box under the change of humidity difference. UTILITY MODEL CONTENTS

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a humidification explosion-proof valve, which can effectively solve the technical problem that the existing explosion-proof valve cannot absorb the moisture inside the battery pack.

[0005] The utility model discloses a technical scheme that solves its technical problem is: humidification explosion -proof valve, including valve body, protection cover and fixed base, the valve body is provided with the guide rod who is threaded in the valve body and is arranged between the spring of guide rod and valve body, the spring is used for providing the guide rod with the spring always along the valve body direction, the inside of fixed base is provided with the through hole of leading through, fixed base has the first accommodating cavity and the second accommodating cavity of opening upward, the first accommodating cavity is communicated with the second accommodating cavity, the second accommodating cavity is communicated with the through hole, the inside of first accommodating cavity is provided with the gas permeable membrane for blocking the through hole, the inside of second accommodating cavity is provided with the humidity control piece for blocking the through hole, the gas permeable membrane is stacked and is set in the upper of humidity control piece, when explosion -proof valve is in closed state, the top end of guide rod is in contact with the through hole and realizes the block, prevents the inside and outside gas not to flow, effectively blocks the entrance of humidity, when the inside humidity is partial, and humidity control piece absorbs humidity.

[0006] Further, the inside of the first accommodating cavity is provided with a sealing gasket, the sealing gasket is located above the gas permeable membrane, the sealing gasket is used to compress the gas permeable membrane and humidity control piece, the protection cover is connected with the fixed base through the sealing gasket.

[0007] Further, a strong magnet is arranged between the fixed base and the protection cover, the top end of the strong magnet is connected with the protection cover, and the bottom end of the strong magnet is connected with the sealing gasket.

[0008] Further, the side of the protection cover extends outward to form a plurality of clamping blocks, the inner wall of the fixed base protrudes to form an annular protrusion, the clamping blocks and the annular protrusion are connected by snap type, and the protection cover and the fixed base are fixed by snap type.

[0009] Further, the end of the fixed base away from the protection cover is recessed inward to form an annular groove, a small sealing ring matched with the annular groove is clamped in the annular groove, the small sealing ring is in sealing contact with the upper end surface of the valve body, and the fixed base and the valve body are sealed.

[0010] Further, one end of the valve body extends outward to form an annular part, the annular part is recessed inward to form a sealing groove, and a large sealing ring matched with the sealing groove is embedded and installed in the sealing groove.

[0011] Further, the end of the valve body close to the annular part extends outward to form a fixed part, a nut is threaded in the fixed part, and the fixed base is threadedly connected with the valve body through the nut.

[0012] Further, a plurality of notches are arranged on the surface of the fixed base, the peripheral edge of the protection cover extends outward to form a plurality of convex blocks corresponding to the positions of the notches, and an exhaust passage communicated with the first accommodating cavity is formed between the notches and the convex blocks.

[0013] Compared with the prior art, the utility model discloses a humidification explosion -proof valve, through the lamination of breathable membrane and humidification sheet, effectively blocked the entering of external humidity, through the humidity of inside humidity of humidification sheet absorption, breathable membrane two -way barrier external humidity, realize dynamic humidity balance, prevent the condensate phenomenon leads to the battery package and the electrical short circuit in the box etc. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the perspective view of the top surface of the utility model humidification explosion -proof valve;

[0015] Figure 2 It is the perspective view of the bottom surface of the utility model humidification explosion -proof valve;

[0016] Figure 3 It is the explosion drawing of the utility model humidification explosion -proof valve;

[0017] Figure 4 It is the structure exploded view of the fixed seat and breathable membrane and humidification sheet and sealing washer of the utility model humidification explosion -proof valve;

[0018] Figure 5 It is the perspective view of the protective cover of the utility model humidification explosion -proof valve;

[0019] Figure 6 It is the perspective view of the protective cover and fixed seat of the utility model humidification explosion -proof valve when connecting.

[0020] Reference numerals in the drawing:

[0021] 1-valve body;2-protective cover;3-guide rod;4-ring part;5-large sealing ring;6-fixed part;7-nut;8-strong suction sheet;9-sealing washer;10-breathable membrane;11-humidification sheet;12-fixed seat;13-through hole;14-ring groove;15-small sealing ring;16-exhaust passage;17-sealing groove;18-spring;19-second containing cavity;20-first containing cavity;21-ring protrusion;22-notch;23-clamping block;24-protruding block. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] The utility model will be described in detail below in conjunction with Figures 1-6 The utility model's humidification explosion -proof valve is described in detail:

[0024] The moisture-regulating explosion-proof valve comprises a valve body 1, a protective cover 2 and a fixing base 12, the valve body 1 is provided with a guide rod 3 penetrating the valve body 1 and a spring 18 arranged between the guide rod 3 and the valve body 1, the spring 18 is used for providing the guide rod 3 with an elastic force always in the direction of the valve body 1, the fixing base 12 is internally provided with a through hole 13, the fixing base 12 has a first accommodating cavity 20 and a second accommodating cavity 19, the first accommodating cavity 20 and the second accommodating cavity 19 are in communication with each other, the second accommodating cavity 19 is in communication with the through hole 13, the first accommodating cavity 20 is internally provided with a breathable film 10 used for blocking the through hole 13, and the second accommodating cavity 19 is internally provided with a moisture-regulating sheet 11 used for blocking the through hole 13, the breathable film 10 is arranged above the moisture-regulating sheet 11 in a laminated mode, when the explosion-proof valve is in a closed state, the top end of the guide rod 3 abuts against the through hole 13 to achieve blocking and prevent internal and external gases from flowing, and the entry of moisture is effectively blocked, when the moisture in the battery pack is too large, the moisture-regulating sheet 11 absorbs the moisture.

[0025] The breathable film 10 arranged in the first accommodating cavity 20 is used for bidirectional blocking of liquid water and external moisture, the moisture-regulating sheet 11 arranged in the second accommodating cavity 19 is used for dynamic regulation of the internal humidity of the battery pack, when the spring 18 is in an extended state, the top end of the guide rod 3 is pushed to abut against the through hole 13 to completely block the flow of internal and external gases, the breathable film 10 blocks the entry of external moisture into the battery pack, and the moisture-regulating sheet 11 absorbs the residual moisture in the battery pack, when the internal pressure of the battery pack exceeds a set value, the gas pressure pushes the guide rod 3 to move, the spring 18 is further compressed, the through hole 13 is opened, the gas sequentially passes through the through hole 13, the second accommodating cavity 19 and the first accommodating cavity 20, and is finally discharged through the exhaust passage 16 of the protective cover 2, thereby preventing the high-pressure failure of the internal devices of the battery pack or the explosion of the battery pack, the breathable film 10 prevents external impurities (external water, water vapor, moisture, salt mist particles and the like) from entering the battery pack in the pressure relief process, and the bidirectional blocking property of the breathable film 10 ensures that external moisture cannot invade, while allowing the internal moisture to pass through the moisture-regulating sheet 11 for regulation, when the external air pressure is greater than a set pressure, the explosion-proof valve is opened, external gas flows in, and the effect of balancing the internal and external pressure differences is achieved.

[0026] The protective cover 2 is used for pressing the breathable film 10 and the moisture-regulating sheet 11 to ensure the sealing of the explosion-proof valve, the clamping block 23 of the side wall of the protective cover 2 is buckled to the annular protrusion 21 of the inner wall of the fixing base 12, and the clamping block 23 is only pressed to be locked during installation and is separated by prying with a tool during disassembly.

[0027] The inside of the first accommodating cavity 20 is provided with a sealing gasket 9 above the air-permeable film 10, the sealing gasket 9 is used to compress the air-permeable film 10 and the humidity adjusting sheet 11, the protective cover 2 is connected with the fixing seat 12 through the sealing gasket 9, the sealing gasket 9 compresses the air-permeable film 10 and the humidity adjusting sheet 11, and meanwhile the connection of the protective cover 2 and the fixing seat 12 through the sealing gasket 9 makes the overall structure more stable.

[0028] The fixing seat 12 and the protective cover 2 are provided with a strong magnet 8, the top end of the strong magnet 8 is connected with the protective cover 2, and the bottom end of the strong magnet 8 is connected with the sealing gasket 9, the strong magnet 8 is arranged between the fixing seat 12 and the protective cover 2, and the connection stability between the two is enhanced.

[0029] The side of the protective cover 2 extends outward to form a plurality of clamping blocks 23, the inner wall of the fixing seat 12 protrudes to form an annular protrusion 21, the clamping blocks 23 and the annular protrusion 21 are connected in a buckle type, the protective cover 2 and the fixing seat 12 are fixed in a buckle type, and the protective cover 2 and the fixing seat 12 are fixed in a buckle type through the clamping blocks 23 and the annular protrusion 21.

[0030] The end of the fixing seat 12 away from the protective cover 2 is recessed inward to form an annular groove 14, a small sealing ring 15 matched with the annular groove 14 is clamped in the annular groove 14, the small sealing ring 15 is in sealing contact with the upper end surface of the valve body 1, the sealing between the fixing seat 12 and the valve body 1 is realized, one end of the valve body 1 extends outward to form an annular part 4, the annular part 4 is recessed inward to form a sealing groove 17, a large sealing ring 5 matched with the sealing groove 17 is embedded and installed in the sealing groove 17, the small sealing ring 15 is in sealing contact with the upper end surface of the valve body 1, the gas leakage between the fixing seat 12 and the valve body 1 is effectively prevented, and the sealing performance of the explosion-proof valve is further improved.

[0031] The surface of the fixing seat 12 is provided with a plurality of notches 22, the periphery of the protective cover 2 extends outward to form a plurality of protrusions 24 corresponding to the positions of the notches 22, the notches 22 and the protrusions 24 form an exhaust passage 16 connected with the first accommodating cavity 20, the exhaust passage 16 is used for rapid exhaust when pressure relief, the exhaust passage 16 formed between the notches 22 and the protrusions 24 optimizes the gas flow of the first accommodating cavity 20, when the explosion-proof valve is exhausted, the top end of the guide rod 3 is separated from the through hole 13 under the action of the spring 18, the airflow in the battery pack flows from the through hole 13 into the second accommodating cavity 19, and then flows out of the outside from the exhaust passage 16 through the first accommodating cavity 20.

[0032] The valve body 1 extends outwardly near one end of the annular portion 4 to form a fixing portion 6, the fixing portion 6 is provided with a nut 7, the fixing seat 12 is threadedly connected with the valve body 1 through the nut 7, the fixing seat 12 is threadedly connected with the valve body 1 through the nut 7, and the stability between the fixing seat 12 and the valve body 1 is ensured.

[0033] In the embodiment, the humidity regulating sheet 11 maintains the stability of the humidity inside the battery pack by adsorbing or releasing water vapor, adsorbs excess moisture when the environmental humidity is too high, and releases stored moisture when the humidity is too low, and the humidity regulating sheet 11 is composed of a high polymer material layer, a breathable material layer and a reverse osmosis protection layer, is integrated with the breathable material layer by taking synthetic rubber as a carrier, the reverse osmosis protection layer is composed of a special material, allows gaseous water to pass freely, completely blocks liquid water, has a porous structure on the surface, can capture or release water molecules through physical adsorption, adsorbs water vapor when the humidity inside the battery pack is higher than a set value, reduces the humidity, and releases stored moisture when the humidity of the battery pack is lower than a critical value, and increases the humidity.

[0034] The humidity regulating explosion-proof valve of the embodiment effectively blocks the entry of external moisture through the laminated arrangement of the air permeable film 10 and the humidity regulating sheet 11, absorbs internal moisture through the humidity regulating sheet 11, and blocks external moisture in both directions through the air permeable film 10, realizes dynamic humidity balance, and prevents faults such as electrical short circuit in the battery pack and the box caused by condensation.

[0035] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model, and any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A humidity control explosion-proof valve, comprising a valve body, a protective cover and a fixing base, the valve body is provided with a guide rod penetrating in the valve body and a spring arranged between the guide rod and the valve body, the spring is used to provide the guide rod with an elastic force always in the direction of the valve body, characterized in that: The fixed seat is internally provided with a through hole, the fixed seat has a first accommodating cavity and a second accommodating cavity which are open upward, the first accommodating cavity and the second accommodating cavity are communicated with each other, the second accommodating cavity is communicated with the through hole, the first accommodating cavity is internally provided with a breathable film for blocking the through hole, and the second accommodating cavity is internally provided with a humidity adjusting sheet for blocking the through hole.

2. The humidity-actuated explosion relief valve of claim 1, wherein: The first accommodating cavity is internally provided with a sealing gasket which is located above the breathable film, the sealing gasket is used for pressing the breathable film and the humidity adjusting sheet, and the protective cover is connected with the fixed seat through the sealing gasket.

3. The humidity actuated explosion relief valve of claim 2, wherein: Strong magnets are arranged between the fixed seat and the protective cover, the top end of the strong magnets is connected with the protective cover, and the bottom end of the strong magnets is connected with the sealing gasket.

4. The humidity-actuated explosion relief valve of claim 1, wherein: The side surface of the protective cover extends outward to form a plurality of clamping blocks, the inner wall of the fixed seat protrudes to form an annular protrusion, the clamping blocks and the annular protrusion are connected in a buckle mode, and the protective cover and the fixed seat are fixed in a buckle mode.

5. The humidity modulating explosion relief valve of claim 1, wherein: The end of the fixed seat away from the protective cover is recessed inward to form an annular groove, a small sealing ring matched with the annular groove is clamped in the annular groove, the small sealing ring is in sealing contact with the upper end surface of the valve body, and the fixed seat and the valve body are sealed.

6. The humidity modulating explosion relief valve of claim 1, wherein: One end of the valve body extends outward to form an annular part, the annular part is recessed inward to form a sealing groove, and a large sealing ring matched with the sealing groove is inlaid and installed in the sealing groove.

7. The humidity actuated explosion relief valve of claim 6, wherein: The end of the valve body close to the annular part extends outward to form a fixed part, the fixed part is provided with a nut, and the fixed seat is threadedly connected with the valve body through the nut.

8. The humidity actuated explosion relief valve of any one of claims 1-7, wherein: The surface of the fixed seat is provided with a plurality of notches, the peripheral edge of the protective cover extends outward to form a plurality of convex blocks corresponding to the positions of the notches, and the notches and the convex blocks form an exhaust passage communicated with the first accommodating cavity.

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