KR102537046B1 - Venting valve for battery pack - Google Patents

Abstract

The present invention is to prevent the battery pack from exploding by rapidly exhausting emergency gas and pressure generated inside the battery pack. formed housing; a membrane filter provided in the inlet/outlet ventilation hole; An emergency exhaust valve having elasticity disposed inside the housing directly below the emergency exhaust hole to close the emergency exhaust hole and opening the emergency exhaust hole through shape deformation by instantaneous pressure when emergency pressure inside the battery pack is generated: And a plurality of emergency circulation ports communicating with the inside of the case are disposed below the housing in a radially formed state, and support the emergency exhaust valve so that the emergency exhaust valve can selectively open the emergency circulation port according to emergency pressure. It includes; support plate to.

Description

Venting valve for battery pack {Venting valve for battery pack}

The present invention relates to a venting valve, and more particularly, to a venting valve for a battery pack that prevents explosion of the battery pack by quickly exhausting emergency gas and pressure generated inside the battery pack.

As technology development and demand for mobile devices, electric vehicles, etc. increase, the demand for secondary battery cells as an energy source is rapidly increasing. A secondary battery cell is a battery capable of repeating charging and discharging because mutual conversion between chemical energy and electrical energy is reversible.

In addition, a plurality of battery modules equipped with a plurality of secondary battery cells may be installed as a battery pack by mounting a plurality of batteries in an electric vehicle or the like.

Recently, when these secondary battery cells are installed in an electric vehicle, etc., a technology (CTP: Cell To Pack) is proposed to omit the process of manufacturing and installing the secondary battery cells as a battery module and directly install the secondary battery cells in an electric vehicle to form a battery pack. It became.

However, since the secondary battery cell generates heat through the process of charging and discharging, if any one secondary battery cell explodes or an external shock causes a problem that any one secondary battery cell explodes, There is a fatal problem in that the explosion is propagated to all other secondary battery cells installed inside the battery pack and causes a chain reaction.

That is, thermal propagation by explosion of any one secondary battery cell, flame or high temperature, high pressure gas, etc. affects other secondary battery cells installed inside the battery pack of an automobile, leading to a chain explosion. .

Therefore, in recent years, technologies have been proposed to prevent the internal pressure from rapidly increasing due to heat generation of a specific secondary battery cell while compensating for pressure with the inside of the battery pack.

For example, Korean Patent Registration No. 10-2115756 discloses a pressure compensating device for a housing, wherein the pressure compensating device includes a lattice cage having an inner surface, an outer surface, and a gas through opening, wherein the gas through opening is The outer faces are connected in a flow-guiding manner as required, and are limited in their flow direction by an inner edge and an outer edge, the gas permeable opening being covered by a gas permeable membrane, and the membrane being formed as a nonwoven composite. A pressure compensating device is disclosed, comprising one or more layers of non-woven fabric, wherein the membrane is provided with a pressure relief valve configured as a burst arrestor, in functional parallel connection to the membrane.

The pressure compensating device allows pressure compensation to be performed by applying a membrane to the upper side of the inner surface, while emergency gas is discharged through a ring-shaped pressure relief valve having a predetermined curved surface. However, the above pressure compensating device has the following problems.

That is, when an emergency gas (flame or high-temperature, high-pressure gas) is generated, the gas is released primarily through the membrane, and the residual gas that is not released through the membrane is secondarily released through the pressure relief valve, so that the emergency gas can be released quickly. There is a fatal problem that is difficult to release.

In detail, since the pressure of the emergency gas is higher than the gas permeability standard of the membrane, the gas cannot be completely discharged, and the remaining gas is discharged while bypassing the pressure relief valve side as the internal pressure is further increased.

In addition, since the shape of the pressure relief valve maintains a curved shape, it inevitably has a predetermined height, which inevitably increases the overall height of the pressure compensating device.

Domestic Patent No. 10-2115756

The present invention has been made to solve the above problems and technical prejudices, so that the pressure inside the battery pack is compensated, and even if a gas or an instantaneous pressure rise occurs according to an emergency situation (emergency pressure), the exhaust is immediately exhausted without bypassing. The purpose is to provide a venting valve for a battery pack to be made.

The venting valve for a battery pack of the present invention for achieving the above object is mounted on a battery pack case, a housing having an emergency exhaust hole formed in the center and a plurality of inlet and outlet vents formed along the circumference; a membrane filter provided in the inlet/outlet ventilation hole; An emergency exhaust valve having elasticity disposed inside the housing directly below the emergency exhaust hole to close the emergency exhaust hole and opening the emergency exhaust hole through shape deformation by instantaneous pressure when emergency pressure inside the battery pack is generated: And a plurality of emergency circulation ports communicating with the inside of the case are disposed below the housing in a radially formed state, and support the emergency exhaust valve so that the emergency exhaust valve can selectively open the emergency circulation port according to emergency pressure. It includes; support plate to.

Here, the emergency exhaust valve is in close contact with the plate surface of the support plate to close the emergency circulation hole, the air flap having a curved surface from the center to the outside; a protruding support piece protruding from the lower surface of the air flap and separating the air flap from the support plate so that the curved shape of the air flap can be maintained on the support plate; a post extending a predetermined length from the protruding support piece; and a locking member formed on the support plate and passing through a locking hole formed at the center of the support plate and extending to the other side of the locking hole to support the emergency exhaust valve on the support plate.

At this time, it is preferable that the thickness of the air flap gradually decreases toward the outside from the center.

In addition, it is preferable that an elastic member disposed inside the housing in a state of being in contact with the air flap to provide elasticity to the air flap at all times is further provided.

Further, it is preferable that a stepped curved groove having a curved surface inclination is formed on the plate surface of the support plate so that the outer circumference of the air flap having the curved surface can be seated.

Here, the material of the emergency exhaust valve is preferably silicon-based.

On the other hand, it is preferable that an exhaust pipe that is open to the lower side of the housing while communicating with the emergency exhaust hole and an inlet and outlet pipe that is open to the lower side of the housing and communicates with the inlet and outlet vents are formed inside the housing.

In addition, it is preferable that a guide cover for guiding the gas flowing through the inlet/outlet vent hole and the emergency exhaust hole is spaced apart from the top of the housing.

Finally, a plurality of spaced protrusions for separation are formed on the upper surface of the housing and the inner surface of the guide cover, respectively, and a plurality of hooks are formed on one of the upper surface of the housing and the inner surface of the guide cover, and the other is formed with a plurality of hooks. It is preferable that a plurality of hooking holes are formed through which hooks are inserted.

According to the venting valve for a battery pack of the present invention having the configuration as described above, the pressure inside the battery pack is compensated through the inlet and outlet holes, and the gas or instantaneous pressure according to the emergency pressure inside the battery pack is released to the outside as in the prior art. There is an excellent effect of enabling rapid discharge by instantly concentrating into the emergency exhaust hole formed in the center through the emergency exhaust valve without detouring in the direction.

In addition, the emergency exhaust valve has an effect that can be reused as it is returned to an initial state after emergency pressure exhaust.

In addition, as the emergency exhaust is exhausted through the central emergency exhaust hole, the pressure relief valve having a predetermined height is not required as in the prior art, thereby minimizing the height of the venting valve so that the venting valve interferes when the battery pack is installed in the vehicle. has the effect of preventing this from happening.

1 is a reference diagram showing a state in which a venting valve according to the present invention is installed in a battery pack;
2 and 3 are a perspective view and a bottom perspective view showing a venting valve according to the present invention,
4 and 5 are an exploded perspective view and a bottom exploded perspective view in which FIGS. 2 and 3 are disassembled;
Figure 6 is a perspective view showing an emergency exhaust valve of the configuration of the venting valve according to the present invention,
7 is a sectional view of a main part along line II of FIG. 2;
8 and 9 are reference views showing a process in which emergency pressure is exhausted through an emergency exhaust valve.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. These embodiments are provided to explain the present invention in more detail to those skilled in the art to which the present invention pertains. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. Terms are only used to distinguish one component from another.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

1 is a reference view showing a state in which a venting valve according to the present invention is installed in a battery pack, FIGS. 2 and 3 are a perspective view and a bottom perspective view showing a venting valve according to the present invention, and FIGS. 4 and 5 are FIGS. Figure 3 is an exploded perspective view and bottom exploded perspective view, Figure 6 is a perspective view showing an emergency exhaust valve of the configuration of the venting valve according to the present invention, Figure 7 is a main portion sectional view along line II of Figure 2, Figures 8 and 9 is a reference diagram showing a process in which emergency pressure is exhausted through an emergency exhaust valve.

As shown in Figures 1 to 9, the venting valve 200 of the present invention is mounted on the battery pack (A) case (K), the emergency exhaust hole 111 is formed in the center, and a plurality of inlet and outlet ports are formed along the circumference. a housing 110 in which pores 112 are formed; a membrane filter 120 provided in the entry/exit ventilation hole 112; It is disposed inside the housing 110 directly below the emergency exhaust hole 111 to close the emergency exhaust hole 111, and when emergency pressure is generated inside the battery pack (A), emergency exhaust is performed through shape deformation by instantaneous pressure. An emergency exhaust valve 130 having elasticity for opening the ball 111: and a plurality of emergency circulation ports 141 communicating with the inside of the case K are radially formed on the lower side of the housing 110. and a support plate 140 supporting the emergency exhaust valve 130 so that the emergency exhaust valve 130 can selectively open the emergency circulation port 141 according to emergency pressure.

Prior to description, the biggest feature of the present invention is that when the pressure instantaneously increases due to the occurrence of emergency pressure (heat, flame, high-pressure gas, etc.) inside the battery pack (A), it is immediately concentrated in the center of the venting valve and quickly discharged. It is there to make this happen.

1 shows that a plurality of venting valves 200 are installed on the upper and side surfaces of the case K of the battery pack A.

That is, the venting valve 200 of the present invention is installed in the battery pack (A) case (K) as shown in FIG. This is to ensure that the rising pressure is quickly discharged to the outside.

Here, the number and installation position of the venting valves 200 installed in the case K of the battery pack A are not limited, but may vary depending on the size or capacity of the battery pack A, of course.

As shown in FIGS. 2 and 3, the venting valve 200 has a circular shape having a predetermined height as a whole, and includes a plurality of fastening holes 110a formed in the housing 110 to be described later and a fastening hole 110a. ) It is coupled to the case (K) of the battery pack (A) through the coupling bolt (110b) penetrating.

At this time, of course, a communication hole A1 capable of communicating with the venting valve 200 is formed in the case K where the venting valve 200 is installed.

In this embodiment, the venting valve 200 is illustrated as having a circular shape, but the shape is not limited because it may be formed in a rectangular shape, a polygonal shape, an elliptical shape, or the like.

Hereinafter, the structure of the venting valve 200 will be described in detail with reference to FIGS. 4 to 9 .

The venting valve includes a housing 110, a membrane filter 120, an emergency exhaust valve 130, and a support plate 140.

The housing 110 is installed in the battery pack (A) case (K) in a circular shape having a predetermined height, and four emergency exhaust holes 111 are radially formed on the upper surface of the circular center in the drawing based on the center. (110) is formed in a penetrating state.

In addition, on the circumference of the upper surface of the housing 110, four inlet/outlet vents 112 are formed along the circumference to penetrate the housing 110 as shown in the drawing.

Here, the four emergency exhaust holes 111 are normally closed by the emergency exhaust valve 130 to be described later, and when emergency pressure is generated inside the battery pack A, the emergency exhaust valve 130 operates to release the pressure to the outside. will be emitted with

In addition, the four inlet/outlet holes 112 are in communication with the outside, and the battery pack (A) case (K) is connected to the battery pack (A) according to various environmental changes such as temperature fluctuations and air pressure fluctuations during charging/discharging of the battery pack (A). When expansion/contraction of occurs, pressure is discharged or external gas is introduced so that the pressure inside the battery pack (A) can be compensated at all times.

On the other hand, in the center of the housing 110, as shown in FIGS. 5 and 7, a circular exhaust pipe 113 is formed in communication with the four emergency exhaust holes 111 and is open to the lower side of the housing 110. there is.

In addition, a ring-shaped entry/exit conduit 114 is formed on the lower circumference of the housing 110 and communicates with the four entry/exit vents 112 to the outside of the exhaust passage 113 and is open downward.

That is, the exhaust pipe 113 and the entry/exit pipe 114 communicate with the emergency exhaust hole 111 and the entry/exit ventilation hole 112, respectively, in the downward direction, that is, as shown in FIG. 7, the battery pack (A) case (K) It is in a state of communication with the communication hole (A1) of.

The membrane filter 120 is provided in the inlet/outlet vent 112 through the inlet/outlet conduit 114, and is attached to the lower surface of the inlet/outlet vent 112 as shown in FIG.

At this time, the membrane filter 120 is attached through an adhesive material or tape so that it can be placed on the bottom surface of the entry/exit ventilation hole 112 in a taut state without wrinkles.

The membrane filter 120 maintains appropriate permeability so as to discharge high-temperature and high-pressure gas in a mesh shape, and fundamentally blocks contaminants from entering from the outside.

And, the permeability of the membrane filter 120 is preferably 100 mbar so that the flow according to the inflow of internal pressure or external air can be made smoothly. However, the permeability of the membrane filter 120 is only optional and may vary depending on the width of the inlet/outlet vent 112, the capacity and internal pressure of the battery pack A, and the like.

Hereinafter, detailed description of the membrane filter 120 will be omitted as it is a equipment widely applied in the industrial field.

The emergency exhaust valve 130 closes the emergency exhaust hole 111 of the housing 110 so that it can be selectively opened according to the state of the battery pack A.

That is, the emergency exhaust valve 130 is disposed as shown in FIG. 7 at the lower end of the exhaust pipe 113 inside the housing 110, which is directly below the emergency exhaust hole 111, and closes the emergency exhaust hole 111 at normal times, When emergency pressure is generated inside the battery pack (A), the pressure is discharged through the emergency exhaust hole 111 by opening the emergency circulation port 141 of the support plate 140 to be described later as the shape is deformed by the pressure instantly increasing inside. make it possible

At this time, the emergency exhaust valve 130 should have a predetermined elasticity as a whole, and in particular, it is preferable to be made of a silicon-based material so that the shape deformation of the air flap 131 described later can be smoothly performed.

In addition, the emergency exhaust valve 130 made of silicon preferably has a hardness sufficient to allow the shape deformation of the air flap 131 to be described later when a set emergency pressure (eg, 1 bar) is applied.

In this embodiment, although the material of the emergency exhaust valve 130 is described as being silicon-based, the type is not limited as long as it is a material that can be transformed in shape through elasticity.

On the other hand, the housing 110 may further include an elastic member 160 disposed in contact with the upper surface of the air flap 131 of the emergency exhaust valve 130 to impart constant elasticity to the air flap 131. there is.

Here, when the elastic member 160 is applied, the emergency pressure may be set high or the hardness of the air flap 131 may be low.

In addition, the elastic member 160 is preferably a compression spring providing resistance to the compression force applied in the axial direction.

The emergency exhaust valve 130 includes an air flap 131, a protruding support piece 132, a post 133, and a locking member 134 as shown in FIGS. 6 to 9 so as to perform the above functions. You may.

The air flap 131 is to selectively close the emergency circulation hole 141 formed on the support plate 140 to be described later, and is in close contact with the plate surface of the support plate 140 in a state including the emergency circulation hole 141.

This air flap 131 maintains a circular shape to the extent that it can include the emergency circulation port 141 when viewed from a plane so that the emergency circulation port 141 can be closed, and extends from the center of the circle toward the outside. It maintains the shape of an umbrella with a gradually lowering curved surface.

At this time, the air flap 131 is preferably formed so that the thickness gradually becomes thinner as it goes outward from the center, which normally closes the emergency circulation port 141 as shown in FIG. This is so that the circumferential surface relatively adjacent to the emergency circulation port 141 can be pushed up by the pressure so that exhaust through the emergency circulation port 141 can be made quickly.

The protruding support piece 132 is formed to protrude from the lower surface of the air flap 131, and the air flap 131 is attached to the support plate 131 so that the umbrella curved shape of the air flap 131 can be maintained on the surface of the support plate 140. away from (140).

That is, the protruding support piece 132 is seated on the support plate 140 to separate the center of the air flap 131 from the support plate 140 as shown in FIG. It is to adhere to the curved groove 143 of (140).

The post 133 has a cylindrical shape and extends from the protruding support piece 132 toward the support plate 140 by a predetermined length.

The locking hole 134 is to allow the emergency exhaust valve 130 to be fixed to the support plate 140, and forms a predetermined spherical shape protruding outward in a curved shape at an appropriate place in the longitudinal direction of the support 133 there is.

That is, the locking hole 134 penetrates the locking hole 142 formed in the center of the support plate 140 and spans the other side of the locking hole 142, so that the emergency exhaust valve 130 is supported on the support plate 140. make it possible

At this time, the formation position of the locking hole 134 is formed at a distance that can span the lower surface of the holding hole 142 when the support 134 passes through the holding hole 142 of the support plate 140, as shown in FIG. it is desirable to be

The support plate 140 is to allow the emergency exhaust valve 130 to be disposed on the exhaust pipe 113, while maintaining the shape of a disk having a predetermined thickness, the lower part of the housing 110, that is, the exhaust pipe ( 113), and a plurality of emergency circulation ports 141 communicating with the inside of the case K are formed radially through the inside of the plate surface.

That is, the support plate 140 supports the emergency exhaust valve 130 in a vertical state, so that the air flap 131 of the emergency exhaust valve 130 closes the emergency circulation ports 141 and the case K When an internal emergency pressure is generated, the emergency circulation hole 141 is selectively opened so that the pressure can be discharged through the emergency exhaust hole 111.

To this end, at the center of the support plate 140, the locking hole 142 of the emergency exhaust valve 130 can be passed through and hung so that the emergency exhaust valve 130 can be supported upright. ) is formed.

In addition, while including emergency circulation holes 141 formed radially on the plate surface of the support plate 140, a stepped curved groove having a predetermined curved surface slope so that the outer circumference of the air flap 131 having a curved surface can be seated ( 143) is preferably formed.

This is because the inner curved surface of the curved groove 143 is in close contact with the circumference of the air flap 131 to maintain the airtightness between the air flap 131 and the support plate 140, so that the pressure movement at normal times is (114) and the inlet/outlet ventilation hole (112) so that it can be made.

On the other hand, the upper part of the housing 110 guides the gas flow of the plurality of emergency exhaust holes 111 and the inlet and outlet vents 112 formed on the upper surface, and foreign substances are removed through the emergency exhaust holes 111 and the inlet and outlet vents 112. A guide cover 150 for covering the inlet is disposed.

That is, the guide cover 150 is formed in a circular shape with an outer circumference curved toward the housing 110 as shown in FIG. 7, thereby guiding the flow of gas and simultaneously opening the emergency exhaust hole 111 and The ventilation hole 112 is protected from the external environment.

The guide cover 150 may be spaced apart from the upper surface of the housing 110 to guide gas flowing through the entry/exit vent hole 112 and the emergency exhaust hole 111 .

To this end, as shown in FIGS. 4, 5 and 7, a plurality of spaced protrusions P may be formed on the upper surface of the housing 110 and the inner surface of the guide cover 150 to be spaced apart at predetermined intervals. .

In addition, a plurality of hooks 151 are formed on either one of the upper surface of the housing 110 and the inner surface of the guide cover 150 so that the guide cover 150 and the housing 110 can be fixed while maintaining a distance therebetween. And, a plurality of hooking holes 115 into which the hook 151 is inserted may be formed in the other one.

In this embodiment, the hook 151 is formed on the guide cover 150, and the hooking hole 115 is formed on the upper surface of the housing 110, but the positions of the hook 151 and the hooking hole 115 are limited. I never do that.

Symbol S, which is not described, relates to a sealing member, which is disposed below the housing 110 as shown in FIG. 7 and serves to maintain airtightness when the venting valve 200 is installed in the battery pack A.

Hereinafter, with reference to the accompanying drawings, a process of discharging the momentarily increased pressure when an emergency pressure is generated in the battery pack A through the venting valve 200 according to the present invention will be described.

First, the venting valve 200 installed in the battery pack (A), as shown in FIG. 8, allows the gas from the outside and the gas inside the battery pack (A) to flow in and out smoothly through the inlet and outlet holes 112 at normal times. Pressure compensation inside the pack (A) is made.

At this time, the emergency exhaust valve 130 closes the emergency circulation port 141 as shown in FIG. 8 because the emergency pressure is not generated.

Thereafter, when an emergency pressure due to high-temperature heat generation is generated in a secondary battery cell inside the battery pack A, the pressure inside the case K is instantaneously increased.

The increased pressure is directed to the venting valve 200 where the normal pressure flows inside the case K.

The pressure concentrated in the venting valve 200 is primarily discharged through the inlet/outlet vent 112, but when the increased pressure exceeds the permeability of the inlet/outlet vent 112 and the membrane filter 120, the pressure increases as shown in FIG. It enters the emergency circulation port 141 of the support plate 140.

The pressure entering the emergency circulation port 141 is concentrated on the bottom surface of the air flap 131 through the emergency circulation port 141 as shown in FIG. By lifting and changing the shape of the rim, the emergency circulation hole 141 blocking the inflow of external gas is opened.

In this case, since the emergency pressure is opened at the same time as the emergency circulation port 141, the exhaust pipe 113 is also open, so as shown by the arrow in FIG. It is discharged to the outside through (111).

As the emergency pressure that increases momentarily is quickly discharged through the emergency exhaust hole 111 in the center of the housing 110, the internal pressure of the case K is prevented from rapidly rising, thereby preventing the other inside the battery pack A. Continuous high-temperature heat generation of secondary battery cells or explosion and burnout due to this are prevented.

Also, when the emergency pressure is completely discharged, the emergency exhaust valve 130 returns to its initial state.

As described so far, the venting valve for a battery pack of the present invention allows pressure compensation inside the battery pack to be made through the inlet and outlet holes, and gas or instantaneous pressure according to the occurrence of emergency pressure inside the battery pack is directed outward as in the prior art. There is an excellent effect of enabling rapid discharge by instantly concentrating into the emergency exhaust hole formed in the center through the emergency exhaust valve without bypassing the exhaust gas.

In addition, the emergency exhaust valve has an effect that can be reused as it is returned to an initial state after emergency pressure exhaust.

In addition, as the emergency exhaust is exhausted through the central emergency exhaust hole, the pressure relief valve having a predetermined height is not required as in the prior art, thereby minimizing the height of the venting valve so that the venting valve interferes when the battery pack is installed in the vehicle. has the effect of preventing this from happening.

In the above, the venting valve for a battery pack of the present invention has been described with preferred embodiments and accompanying drawings, but this is only intended to help understanding of the invention and is not intended to limit the technical scope of the invention thereto.

That is, various modifications or modifications are possible to those skilled in the art without departing from the technical gist of the present invention, and such changes or modifications are within the technical scope of the present invention in view of the interpretation of the claims. Needless to say, being within

110: housing 110a: fastener
110b: coupling bolt 111: emergency exhaust hole
112: entry and exit air hole 113: exhaust pipe
114: entrance and exit pipe 115: hanging hole
120: membrane filter 130: emergency exhaust valve
131: air flap 132: protruding support piece
133: support 134: hook
140: support plate 141: emergency circulation port
142: locking hole 143: curved groove
150: guide cover 151: hook
160: elastic member 200: venting valve
A: Battery pack K: Case
P: spaced protrusion S: sealing member

Claims (9)

A housing 110 mounted on a case K of the battery pack A and having an emergency exhaust hole 111 formed at the center and a plurality of entry/exit ventilation holes 112 formed along the circumference;
a membrane filter 120 provided in the entry/exit ventilation hole 112;
It is disposed inside the housing 110 directly below the emergency exhaust hole 111 to close the emergency exhaust hole 111, and when emergency pressure is generated inside the battery pack (A), emergency exhaust is performed through shape deformation by instantaneous pressure. An emergency exhaust valve 130 having elasticity to open the ball 111: and
A plurality of emergency circulation ports 141 communicating with the inside of the case K are radially formed and are disposed on the lower side of the housing 110, and the emergency exhaust valve 130 responds to emergency pressure to the emergency circulation port ( 141) supporting the emergency exhaust valve 130 to be selectively opened; a support plate 140;
The emergency exhaust valve 130 is in close contact with the plate surface of the support plate 140 to close the emergency circulation port 141, and the air flap 131 having a curved surface that gradually becomes thinner toward the outside from the center ; It is formed to protrude from the lower surface of the air flap 131, and the protruding support separates the air flap 131 from the support plate 140 so that the curved shape of the air flap 131 can be maintained on the support plate 140. side (132); a post 133 extending a predetermined length from the protruding support piece 132; And it is formed on the support plate 133 and passes through the locking hole 142 formed at the center of the support plate 140 and spans the other side of the locking hole 142, so that the emergency exhaust valve 130 is connected to the support plate 140. ) It is composed of; a locking member 134 for supporting,
A stepped curved groove 143 having a curved surface inclination is formed on the plate surface of the support plate 140 so that the outer circumference of the air flap 131 can be seated.
The venting valve for a battery pack, characterized in that the circumference of the air flap (131) is in close contact with the curved groove (143) by an elastic member (160) that provides elasticity at all times. delete delete delete delete According to claim 1,
The venting valve for a battery pack, characterized in that the material of the emergency exhaust valve 130 is silicon-based. According to claim 1,
Inside the housing 110,
An exhaust pipe 113 communicating with the emergency exhaust hole 111 and open to the lower side of the housing 110, and an inlet/outlet pipe 114 communicating with the inlet/outlet vent hole 112 and open to the lower side of the housing 110 A venting valve for a battery pack, characterized in that formed. According to claim 1,
Characterized in that the upper part of the housing 110 covers the upper surface, and the guide cover 150 for guiding the gas flowing through the inlet and outlet vent hole 112 and the emergency exhaust hole 111 is spaced apart. Venting valve for battery pack. According to claim 8,
A plurality of separation protrusions P for separation are formed on the upper surface of the housing 110 and the inner surface of the guide cover 150, respectively.
A plurality of hooks 151 are formed on one of the upper surface of the housing 110 and the inner surface of the guide cover 150, and a plurality of hooking holes 115 through which the hooks 151 are inserted and strung on the other A venting valve for a battery pack, characterized in that formed.

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