KR102494573B1 - Venting valve for battery pack - Google Patents

Abstract

The present invention relates to a venting valve for a battery pack, which quickly discharges emergency gas and pressure generated inside a battery pack to prevent the explosion of the battery pack. The venting valve of the present invention comprises: a housing mounted on a battery pack case to have an emergency exhaust hole formed in the center and multiple inlet and outlet vents formed along the circumference; a membrane filter disposed in the inlet and outlet vent; a thin film pad disposed inside the housing directly below the emergency exhaust hole to close the emergency exhaust hole, and expanded and broken by the pressure that increases momentarily when emergency pressure inside the battery pack occurs to open the emergency exhaust hole; and a breaking member disposed inside the housing while being spaced apart from the thin film pad and breaking the expanded thin film pad.

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; A thin film pad disposed inside the housing directly below the emergency exhaust hole to close the emergency exhaust hole, and opening the emergency exhaust hole by being inflated and broken by an instantaneously increasing pressure when an emergency pressure is generated inside the battery pack: and the thin film and a breaking member disposed inside the housing while being spaced apart from the pad and breaking the expanding thin film pad.

At this time, the thin film pad is preferably a thin film of silicon.

Here, it is preferable that the thin film pad has a thickness of 0.1 mm to 0.5 mm.

Further, it is preferable that a breaking line is further formed on the plate surface of the thin film pad to quickly break the thin film pad upon contact with the breaking member.

In addition, the thin film pad is preferably disposed directly below the emergency exhaust hole of the housing in a state of being seated on a rim-shaped press-fitting member having an inner side opened.

On the other hand, it is preferable that the breaking member is provided with a plurality of breaking rods in the form of a tripod, having a predetermined length and having an awl or blade formed at the lower end.

In addition, 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, a pressure plate supporting the thin film pad is press-fitted to the lower surface of the housing, and an emergency circulation hole is formed at the center of the pressure plate to communicate the inside of the battery pack case and the exhaust pipe, and at the circumference of the pressure plate, the battery It is preferable that a plurality of input/output circulation ports communicating the inside of the pack case and the input/output pipe are formed.

On the other hand, 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 breakage of the thin film pad without detouring in the direction.

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;
6 is a perspective view of a main portion showing another form of a break line formed on a thin film pad during the construction of a venting valve according to the present invention;
7 is a sectional view of a main part along line II of FIG. 2;
8 to 10 are reference views illustrating a process in which exhaust is performed through an emergency exhaust hole while a thin film pad is broken through expansion.

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. 3 is an exploded perspective view and bottom exploded perspective view, and FIG. 6 is a perspective view of a main part showing another shape of a break line formed on a thin film pad among the configuration of a venting valve according to the present invention. 8 to 10 are reference views showing a process in which exhaust is performed through an emergency exhaust hole while the thin film pad is broken through expansion.

As shown in Figures 1 to 10, 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 an emergency pressure occurs inside the battery pack (A), it expands and breaks due to the momentarily increasing pressure. A thin film pad 130 opening the emergency exhaust hole 111: and a breaking member disposed inside the housing 110 while being spaced apart from the thin film pad 130 and breaking the expanding thin film pad 130. (140);

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, 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 10 .

The venting valve includes a housing 110, a membrane filter 120, a thin film pad 130, and a breaking member 140.

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

In addition, four entry/exit ventilation holes 112 are formed along the circumference of the upper surface of the housing 110 while penetrating the housing 110 .

Here, the four emergency exhaust holes 111 are in a normally closed state, and allow the pressure to be discharged to the outside when emergency pressure is generated inside the battery pack (A).

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, the ring-shaped inlet and outlet conduit 114 opened to the lower side of the housing 110 while maintaining a predetermined depth while communicating with the four inlet and outlet vents 112 while surrounding the exhaust pipe 113 on the lower circumference of the housing 110. ) is formed.

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 adhered to the filter member 121 having an open inside so that it can be placed on the bottom surface of the inlet/outlet vent 112 in a taut state without wrinkles, and the filter member 121 as shown in FIG. 7 It is disposed on the bottom surface of the entry and exit ventilation hole 112 through the fixing of.

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 thin film pad 130 closes the emergency exhaust hole 111 so that it can be opened according to circumstances, and is located at the lower end of the exhaust pipe 113 inside the housing 110 directly below the emergency exhaust hole 111. It is arranged as shown in FIG. 7 to close the emergency exhaust hole 111 at normal times, and when emergency pressure inside the battery pack A is generated, the battery pack A is broken while expanding curvedly upward in the drawing due to the momentarily increasing pressure inside the battery pack A. and opens the emergency exhaust hole 111.

At this time, the thin film pad 130 is preferably made of a flexible thin silicon material so that it can be rapidly expanded in response to an instantaneous increase in pressure.

In addition, the thickness of the thin film pad 130 is preferably manufactured in the range of 0.1 mm to 0.5 mm so that it can be expanded in response to various internal pressures of the battery pack A installed in various types of vehicles.

If the thin film thickness is less than 0.1 mm, the thin film thickness is too thin, so it expands easily even with the flow of general pressure for pressure compensation, causing a problem of breakage due to contact with the breaking member 140 described later. If the thin film thickness is 0.5 mm or more Since the thickness of the thin film is too thick, the expansion due to the emergency pressure cannot be quickly achieved, causing a fatal effect on the battery pack (A).

In this embodiment, although the thin film pad 130 is described as being made of silicon, the type of thin film pad 130 is not limited as long as it is made of a material that can be stretched or expanded easily.

On the other hand, as shown in FIGS. 4 and 5, on the plate surface of the thin film pad 130, a cross-shaped breaking line ( 131) is formed to be recessed.

At this time, the break line 131 is preferably formed to correspond to each other on the upper and lower plate surfaces of the thin film pad 130 as shown in the enlarged view of FIG. This is to ensure rapid breakage by pressure.

Meanwhile, FIG. 6 shows another shape of the break line 131 formed on the thin film pad 130. Here, the break line 131 maintains a spiral shape corresponding to each other on the upper and lower surfaces of the thin film pad 130. are doing

The break line 131 shown in this embodiment is not limited only to that presented as an embodiment, and may be implemented in various forms.

On the other hand, the thin film pad 130 made of silicon is disposed directly below the emergency exhaust hole 111 of the housing 110 through a press-fitting member 132 in the form of a rim with an inside opening.

To this end, the press-fitting member 132 is press-fitted and fixed into the ring-shaped recessed stepped groove 117 formed at the lowermost end of the exhaust pipe 113, as shown in FIG.

At this time, the thin film pad 130 is disposed on the upper surface of the press-fit member 132 in the drawing and maintains a state disposed on the exhaust pipe 113 by fixing the press-fit member 132 .

The breaking member 140 allows the closed emergency exhaust hole 111 to be opened, and as shown in FIG. 7, it is formed radially in the center of the housing 110 while being spaced apart from the thin film pad 130. It is disposed in the center of the four emergency exhaust holes 111.

The breaking member 140 may be fixed to the center of the housing 110 through fusion, bonding, or bolting, and the fixing method is not limited.

As shown in FIGS. 5 and 7 , the breaking member 140 has the shape of a tripod equipped with three breaking rods 141 having a predetermined length toward the thin film pad 130, and each breaking rod 141 is shown in the drawings. An awl or blade may be formed at the lower end portion to contact the expanding thin film pad 130 so that the thin film pad 130 can be broken instantaneously.

At this time, of course, the length of the breaking rod 141 is set according to the set expansion height of the thin film pad 130 that expands according to the internal pressure of the battery pack A installed in the vehicle model.

Also, the breakable member 140 may be formed of a stainless material so as to prevent corrosion due to rigidity and long-term installation.

That is, the breaking member 140 opens the emergency exhaust hole 111 by breaking the surface of the thin film pad 130 that expands toward the breaking member 140 due to the increased pressure when the emergency pressure of the battery pack A is generated. The increasing pressure can be quickly discharged through the emergency exhaust hole 111 (see FIGS. 9 and 10).

In this embodiment, although the breaking member 140 is described as being formed of three breaking rods 141, the number is not limited because it can be implemented with at least one or three or more. In addition, it goes without saying that the structure capable of breaking the thin film pad 130 may have various modifications.

On the other hand, a disc-shaped pressure plate 116 may be press-fitted to the lower surface of the housing 110 to stably support the thin film pad 130 fixed to the lowermost end of the exhaust pipe 113 .

At this time, a circular emergency circulation hole 116a for communicating the inside of the battery pack A and the case K with the exhaust pipe 113 is formed to pass through the center of the pressure plate 116, and the peripheral portion of the pressure plate 116 A plurality of input/output circulation ports 116b communicating the inside of the case K of the battery pack A and the input/output pipe 114 are formed to pass through at positions corresponding to the input/output conduit 114.

That is, the pressure plate 116 blocks the detachment of the thin film pad 130 installed through the support of the press-in member 132 from the housing 110, and at the same time, the emergency circulation port 116a and the entry/exit conduit 114 are connected to the case. By communicating with the communication hole (A1) of (K), the pressure inside the battery pack (A) through the inlet/outlet hole 112 is constantly compensated, while the pressure that increases when an emergency pressure is generated quickly goes to the exhaust pipe ( 113) to be directed.

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

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 thin film pad 130 is not inflated because emergency pressure is not generated.

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

The increasing pressure is directed toward the venting valve 200 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 116a of the pressure plate 116.

The pressure entering the emergency circulation hole 116a is concentrated as indicated by the arrow in FIG. 9 and expands the thin film pad 130 in the direction in which the breakable member 140 is installed.

The thin film pad 130 comes into contact with the breaking rod 141 of the breaking member 140 at any moment during the expansion process, and in this process, as shown in FIG. The exhaust hole 111 is opened.

The increased pressure is discharged to the outside while flowing in the direction of the arrow shown in FIG. 10 according to the opening of the emergency exhaust hole 111 .

As the high-temperature pressure, which 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 increasing, thereby reducing the internal pressure of the battery pack A. Continuous high-temperature heat generation of other secondary battery cells or explosion and burnout due to this are prevented.

As described so far, the venting valve for a battery pack of the present invention allows the pressure compensation inside the battery pack to be made through the inlet and outlet holes, and the gas or instantaneous pressure according to the 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 rupture of the thin film pad without detouring to the .

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

100: 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
116: pressure plate 116a: emergency circulation port
116b: entry and exit circulation port 117: stepped home
120: membrane filter 121: filter member
130: thin film pad 131: breaking line
132: press-fitting member 140: breaking member
141: breaking bar 150: guide cover
151: hook 200: venting valve
A: Battery pack K: Case
P: spaced protrusion S: sealing member

Claims (10)

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 an emergency pressure occurs inside the battery pack (A), it expands and breaks due to the momentarily increasing pressure. A thin film pad 130 opening the emergency exhaust hole 111: and
A breaking member 140 disposed inside the housing 110 while being spaced apart from the thin film pad 130 and breaking the expanding thin film pad 130;
Inside the housing 110, an exhaust pipe 113 communicated with the emergency exhaust hole 111 and opened to the lower side of the housing 110, and communicated with the entry/exit vent hole 112 to the lower side of the housing 110. A venting valve for a battery pack, characterized in that the inlet and outlet pipe 114 is formed. According to claim 1,
The thin film pad 130 is a venting valve for a battery pack, characterized in that the thin film of silicon. According to claim 1,
The venting valve for a battery pack, characterized in that the thickness of the thin film pad (130) is 0.1mm ~ 0.5mm. According to claim 1,
A venting valve for a battery pack, characterized in that a breaking line 131 is further formed on the plate surface of the thin film pad 130 so that the thin film pad 130 is rapidly broken when in contact with the breaking member 140. According to claim 1,
The thin film pad 130 is disposed directly below the emergency exhaust hole 111 of the housing 110 in a state of being seated on a press-fitting member 132 in the form of a rim with an opening inside. Battery pack, characterized in that venting valve. According to claim 1,
The breaking member 140 is a venting valve for a battery pack, characterized in that it is provided with a plurality of breaking rods 141 having a predetermined length and having an awl or a blade formed at a lower end in the form of a tripod. delete According to claim 1,
A pressure plate 116 supporting the thin film pad 130 is press-fitted to the lower surface of the housing 110,
An emergency circulation port 116a is formed at the center of the pressure plate 116 to communicate the inside of the battery pack A and the case K and the exhaust pipe 113,
A venting valve for a battery pack, characterized in that a plurality of input/output circulation holes 116b communicating the inside of the case (K) of the battery pack (A) and the input/output pipe line (114) are formed on the circumference of the press plate (116). 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 9,
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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