WO2023157999A1 - Venting device for battery pack - Google Patents

Venting device for battery pack Download PDF

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Publication number
WO2023157999A1
WO2023157999A1 PCT/KR2022/002528 KR2022002528W WO2023157999A1 WO 2023157999 A1 WO2023157999 A1 WO 2023157999A1 KR 2022002528 W KR2022002528 W KR 2022002528W WO 2023157999 A1 WO2023157999 A1 WO 2023157999A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
passage
gas
ejected
outside
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Application number
PCT/KR2022/002528
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French (fr)
Korean (ko)
Inventor
윤양원
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에프엠에스 주식회사
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Publication of WO2023157999A1 publication Critical patent/WO2023157999A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a venting device for a battery pack, and more particularly, can relieve a pressure difference between the inside and outside of a battery pack at normal times, and when gas is ejected due to the generation of an event in the battery pack, the ejected gas is discharged to the outside. It is about a venting device for a battery pack that can be discharged.
  • an internal short-circuit due to overcharging or failure may occur or gas may be generated from the inside during repeated charging and discharging, which is referred to as venting gas.
  • venting gas For example, when an overcurrent flows, the temperature of the secondary battery inside rises rapidly. Such a rapid increase in temperature may cause a decomposition reaction of the electrolyte solution and thus gas may be generated.
  • gas When gas is generated inside the battery pack, the battery pack may be deformed, damaged, or exploded when the gas is collected inside the pack.
  • the battery pack is provided with a venting device that reduces internal pressure by discharging internal gas to the outside.
  • the battery pack since the pressure of the battery pack increases or decreases when the temperature of the battery cell increases or decreases, the pressure difference as well as heat exchange must be resolved through exchange with external air. Therefore, the battery pack requires a breathing device that can communicate with outside air.
  • Patent Publication No. 10-2022-0008602 (published on January 21, 2022)
  • Patent Publication No. 10-2021-0091514 (published on July 22, 2021)
  • Patent Publication No. 10-2020-0107214 published on September 16, 2020
  • the conventional venting device has only a discharge passage through which gas can be discharged when gas is ejected due to an abnormality of the battery pack, there is a problem in that a breathing device capable of resolving the temperature or pressure difference between the inside and outside of the battery is separately required.
  • An object of the present invention is to provide a venting device capable of exchanging air with the outside as well as discharging gas when gas is ejected due to an abnormality of a battery pack.
  • a venting device for a battery pack includes a housing means, a membrane membrane, and a blocking disk means.
  • the housing means is mounted on the battery pack by forming a first passage through which the inside and outside of the battery pack communicate with each other and a second passage through which the inside of the battery pack communicates with the outside.
  • the membrane membrane is mounted on the first passage part, and air may flow thereto to relieve a pressure difference between the inside and outside of the battery pack.
  • the blocking disk means is mounted on the second passage to close the second passage, and is broken when gas over a certain pressure is ejected from the battery pack into the second passage.
  • the housing means preferably includes a housing and a cap.
  • the housing has one end open to communicate with the battery pack and an opening formed to allow the membrane film to be mounted therein to form the first passage, and one end and the other end open to communicate with the battery pack.
  • a second case in which the blocking disk means is mounted is provided and mounted on the battery pack.
  • the cap is mounted to the housing with a vent formed through the second case so that the second passage is formed.
  • the second case has one end opened so that gas ejected from the battery pack can flow in, and the inner cylinder mounted inside the first case, and the blocking disk means It is preferable to have a support coupled to an inner surface of the inner cylinder to support one side of one surface.
  • the cap has an insertion portion capable of supporting one side of the other surface of the blocking disk means.
  • the blocking disk means includes a first Teflon film, a disk plate, and a second Teflon film.
  • the first Teflon film is thin enough to break when the gas is ejected and seals the inner cylinder.
  • the disk plate supports one surface of the first Teflon film by being incised so that it can be broken when a gas having a pressure higher than the pressure is ejected. An incision is formed in the second Teflon film so that it can be broken when the gas is ejected to protect the other surface of the first Teflon film.
  • the cap in the venting device for the battery pack, includes a damping protrusion protruding in the direction of the inner cylinder to collide with the foreign matter flowing into the ventilation hole in order to reduce the speed of the foreign matter flowing into the ventilation hole from the outside. It is desirable to provide more.
  • the cap is fixed to the first case with bolts, and in order to protect the membrane membrane mounted in the opening, a reinforcing bar is further provided to surround the membrane membrane so that air can flow through the membrane. It is desirable to do
  • the blocking disk means when gas is ejected due to an abnormality of the battery pack, the blocking disk means is ruptured, and gas can be ejected to the outside through the blocking disk means.
  • air when the temperature of the battery pack rises and a pressure difference between the inside and outside is generated, air may flow in or out through the membrane to eliminate the pressure difference between the inside and outside of the battery pack.
  • FIG. 1 is a perspective view of an embodiment of a venting device for a battery pack according to the present invention
  • Figure 2 is an exploded perspective view of the embodiment shown in Figure 1;
  • Figure 3 is a cross-sectional view of the embodiment shown in Figure 1;
  • housing means 10a first passage part
  • FIGS. 1 to 3 An embodiment of a venting device for a battery pack according to the present invention will be described with reference to FIGS. 1 to 3 .
  • a venting device for a battery pack includes a housing means 10, a membrane membrane 25, a blocking disk means 30 and an O-ring 40.
  • the housing means 10 is mounted on a battery pack (not shown) and includes a first passage portion 10a for introducing and discharging air to eliminate the pressure difference between the battery pack and a device for discharging gas ejected from the battery pack. Two passages 10b are provided. To this end, the housing means 10 includes a first case 11, a second case 13, and a cap 18.
  • the first case 11 has one end open to communicate with the inside of the battery pack to form the first passage 10a, and an opening 11b is formed on one side to allow air to flow. And, on the outer circumference of the first case 11, a jaw 11a is formed to which the ring 18a of the cap 18 is coupled.
  • the second case 13 provides a second passage 10b. To this end, the second case 13 includes an inner cylinder 14 and a support 16 .
  • the inner cylinder 14 is mounted inside the first case 10 so that both one end and the other end are open so that gas ejected from the battery pack can flow in through one end. At this time, the other end is exposed from the first case (10). Thus, the gas introduced into one end of the inner cylinder 14 is discharged to the other end to form the second passage 10b.
  • the support member 16 is coupled to the inside of the inner cylinder 14 so as to support one surface of the blocking disk means 30 . At this time, the support 16 should support one surface of the blocking disk means 30 so that the gas introduced into one end of the inner cylinder 14 can pass. In this embodiment, the support 16 is coupled to the inner surface of the inner cylinder 14 in the form of three feet.
  • the cap 18 prevents foreign substances from entering the blocking disk means 30 from the outside and forms a second passage 10b so that the ejected gas can be discharged to the outside when the gas is ejected.
  • the cap 18 blocks the other end of the inner cylinder 14, while a plurality of vents 19a, 19b, and 19c are formed. That is, the cap 18 is mounted on the other end of the inner cylinder 14 to prevent foreign matter from entering the other end of the inner cylinder 14 and impacting the blocking disk means 30, while the inner cylinder 14 Ventilation holes 19a, 19b, and 19c are formed so that gas ejected from the other end can be discharged to the outside.
  • the vents 19a, 19b and 19c form the second passage 10b.
  • Ventilation ports 19a, 19b, and 19c are preferably formed in the form of thin and thin slits to prevent inflow of foreign substances, if possible.
  • the cap 18 includes an insertion portion 21, a damping protrusion 22, a ring 18a, and a reinforcing bar 23.
  • the insertion part 21 is inserted into the other end of the inner cylinder 14 to support the other surface of the blocking disk means 30.
  • the damping protrusion 22 blocks foreign matter from entering the cap 18, but serves to prevent impact from being applied to the blocking disk means 30 by the foreign matter when foreign matter flows into the vent 19b.
  • the water may collide with the blocking disk means 30.
  • the cap 18 forms a roof on the upper part of the ventilation hole 19c to prevent high-pressure water from flowing directly into the ventilation hole 19c, and in the case of the ventilation hole 19b, the insertion part 12 It is formed on the top so that even if water flows in, it collides with the insertion part 12.
  • the ventilation holes 19b and 19c are formed so that the inflowing foreign matter does not directly collide with the blocking disk means 30, if possible.
  • the damping protrusion 22 is formed in front of the vent 19a so as to collide with the damping protrusion 22. Therefore, when a foreign substance flows into the ventilation hole 19a, it first collides with the damping protrusion 22, and then the inflow speed is reduced and falls to the blocking disk means 30, thereby reducing the impact.
  • the ring 18a is formed to be caught on the jaw 11a so that the cap 18 can be fixed to the first case 11.
  • the cap 18 is fixed to the first case 11 with bolts in order to increase the fixing force of the cap 18 in the case of the present embodiment, while the ring 18a is caught on the jaw 11a.
  • the reinforcing bar 23 serves to protect the membrane 25 mounted in the opening 11b of the first case 11 . So, when the cap 18 is coupled to the first case 11, it is formed to surround the membrane film 25, and at this time, it is formed to allow air to pass through the membrane film 25.
  • the membrane film 25 is mounted on the opening 11b of the first case 11 and allows air to flow in order to relieve a pressure difference between the inside and outside of the battery pack.
  • the blocking disk means 30 is mounted inside the inner cylinder 14 so that one side is supported by the support 16 and the other side is supported by the insertion part 21. At this time, the blocking disk means 30 seals the inner cylinder 14, but should be able to be broken by gas pressure so that the ejected gas can be discharged when gas over a certain pressure is ejected from the battery pack.
  • the blocking disk means 30 includes a first Teflon film 31, a disk plate 33, and a second Teflon film 35.
  • the first Teflon film 31 seals the inner cylinder 14 . At this time, the first Teflon film 31 is formed thin so that it can be easily torn when gas is ejected.
  • the disk plate 33 is formed of a thin plate such as Sus and is positioned on one side of the first Teflon film 31 to support the first Teflon film 31 .
  • the disk plate 33 is formed with a cutout 33a so that it can be broken when gas over a certain pressure is ejected.
  • the second Teflon film 35 is positioned on the other surface of the first Teflon film 31 to protect the other surface of the first Teflon film 31 .
  • the second Teflon film 35 is formed with an incision 35a so that it can be broken when gas is ejected. Therefore, the blocking disc means 30 seals the inner cylinder 14 by the first Teflon film 31 when the gas is not ejected, but is broken when the gas is ejected so that the gas is discharged through the second passage 10b.
  • the O-ring 40 is mounted on one end of the outer housing 11 to make the housing means 10 watertight when mounted on the battery pack.
  • the venting device of the present embodiment When the venting device of the present embodiment is mounted on the battery pack, air may flow to the membrane 25 . Therefore, when the pressure of the battery pack increases or decreases, air is discharged or introduced into the membrane membrane 25 . That is, breathing of air is possible. On the other hand, when the gas is ejected due to the occurrence of an event, the ejected gas cannot be discharged to the membrane film 25 at once, and is ejected through the inner cylinder 14 at this time. Then, the blocking disk means 30 is broken by the ejected gas, and the gas is discharged to the outside through the vents 19a, 19b, and 19c.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

The present invention relates to a venting device for a battery pack and, more specifically, to a venting device for a battery pack, wherein the venting device can not only relieve the pressure difference between the inside and outside of the battery pack in normal times, but can also discharge, to the outside, gas ejected due to the occurrence of an event in the battery pack. The venting device for a battery pack according to the present invention comprises a housing means, a membrane film, and a blocking disc means. The housing means is mounted to the battery pack and includes a first passage, through which the inside and outside of the battery pack communicate with each other, and a second passage, through which the inside and the outside of the battery pack communicate with each other. The membrane film is mounted in the first passage and allows air to flow therethrough in order to relieve the pressure difference between the inside and outside of the battery pack. The blocking disc means is mounted in the second passage so as to be able to close the second passage and breaks when gas of a certain pressure is ejected from the battery pack to the second passage. According to the present invention, when gas is ejected due to an abnormality of the battery pack, the blocking disc means breaks, and thus the gas can pass through the blocking disc means and be ejected to the outside. In addition, when a pressure difference is generated between the inside and outside of the battery pack due to an increase in the temperature of the battery pack, air can flow in or out via the membrane film to relieve the pressure difference between the inside and outside of the battery pack.

Description

배터리 팩용 벤팅 디바이스Venting device for battery pack
본 발명은 배터리 팩용 벤팅 디바이스에 대한 것으로서, 더욱 상세하게는 평상시에는 배터리 팩의 내부와 외부의 압력차를 해소해 줄 수 있을 뿐만 아니라 배터리 팩에 이벤트 생성으로 가스가 분출되면 분출된 가스를 외부로 배출할 수 있는 배터리 팩용 벤팅 디바이스에 대한 것이다.The present invention relates to a venting device for a battery pack, and more particularly, can relieve a pressure difference between the inside and outside of a battery pack at normal times, and when gas is ejected due to the generation of an event in the battery pack, the ejected gas is discharged to the outside. It is about a venting device for a battery pack that can be discharged.
이차 전지는 과충전 또는 고장에 의한 내부 단락이 발생하거나 반복적인 충방전 중에 내부로부터 가스가 발생할 수 있으며, 이를 벤팅 가스(venting gas)라고 한다. 예를 들어, 과전류가 흐르면 내부의 이차전지가 온도가 급속하게 상승한다. 이러한 온도의 급속한 상승은 전해액의 분해 반응을 야기하여 가스가 발생될 수 있다. 배터리 팩의 내부에서 가스가 발생할 경우, 이러한 가스가 팩 내부에 포집되면 배터리 팩이 변형 및 파손되거나 폭발할 수 있다. 이를 위해서 배터리 팩에는 내부의 가스를 외부로 배출시켜 내부 압력을 감소시키는 벤팅 디바이스가 마련된다.In the secondary battery, an internal short-circuit due to overcharging or failure may occur or gas may be generated from the inside during repeated charging and discharging, which is referred to as venting gas. For example, when an overcurrent flows, the temperature of the secondary battery inside rises rapidly. Such a rapid increase in temperature may cause a decomposition reaction of the electrolyte solution and thus gas may be generated. When gas is generated inside the battery pack, the battery pack may be deformed, damaged, or exploded when the gas is collected inside the pack. To this end, the battery pack is provided with a venting device that reduces internal pressure by discharging internal gas to the outside.
한편 배터리는 셀의 온도가 증가하거나 감소하면 배터리 팩의 압력이 올라가거나 감소하므로 외부의 공기와 교류를 통하여 열교환 뿐만 아니라 압력차를 해소해야 한다. 그래서 배터리 팩은 외부의 공기와 교류할 수 있는 브리딩(breating) 디바이스가 요구된다.On the other hand, since the pressure of the battery pack increases or decreases when the temperature of the battery cell increases or decreases, the pressure difference as well as heat exchange must be resolved through exchange with external air. Therefore, the battery pack requires a breathing device that can communicate with outside air.
공개특허 제10-2022-0008602호(공개일자 2022년 01월 21일)Patent Publication No. 10-2022-0008602 (published on January 21, 2022)
공개특허 제10-2021-0091514호(공개일자 2021년 07월 22일)Patent Publication No. 10-2021-0091514 (published on July 22, 2021)
등록특허 제10-2181521호(등록일자 2020년 11월 16일)Registered Patent No. 10-2181521 (Registered on November 16, 2020)
공개특허 제10-2020-0107214호(공개일자 2020년 09월 16일)Patent Publication No. 10-2020-0107214 (published on September 16, 2020)
종래의 벤팅 디바이스는 배터리 팩의 이상으로 인하여 가스가 분출될 때 가스가 배출될 수 있는 배출 통로만을 구비하므로 배터리 내외부의 온도나 압력차를 해소할 수 있는 브리딩 장치가 별도로 요구된다는 문제점이 있었다.Since the conventional venting device has only a discharge passage through which gas can be discharged when gas is ejected due to an abnormality of the battery pack, there is a problem in that a breathing device capable of resolving the temperature or pressure difference between the inside and outside of the battery is separately required.
본 발명은 상기의 문제점을 해결하기 위한 것이다. 본 발명은 배터리 팩의 이상으로 가스가 분출시 가스를 배출할 수 있을 뿐만 아니라 외부와의 공기 교류를 할 수 있는 벤팅 디바이스를 제공하는 것을 목적으로 한다.The present invention is to solve the above problems. An object of the present invention is to provide a venting device capable of exchanging air with the outside as well as discharging gas when gas is ejected due to an abnormality of a battery pack.
본 발명에 따른 배터리 팩용 벤팅 디바이스는 하우징수단과, 멤브레인막과, 차단디스크수단을 포함한다. 상기 하우징수단은 배터리 팩의 내부와 외부가 연통되는 제1통로부와, 상기 배터리 팩의 내부와 상기 외부가 연통되는 제2통로부가 형성되어 상기 배터리 팩에 장착된다. 상기 멤브레인막은 상기 제1통로부에 장착되어 상기 배터리 팩의 내부와 외부의 압력차를 해소하기 위하여 공기가 유동될 수 있다. 상기 차단디스크수단은 상기 제2통로부를 폐쇄할 수 있도록 상기 제2통로부에 장착되고 상기 배터리 팩에서 상기 제2통로부로 일정한 압력 이상의 가스가 분출되면 파단된다.A venting device for a battery pack according to the present invention includes a housing means, a membrane membrane, and a blocking disk means. The housing means is mounted on the battery pack by forming a first passage through which the inside and outside of the battery pack communicate with each other and a second passage through which the inside of the battery pack communicates with the outside. The membrane membrane is mounted on the first passage part, and air may flow thereto to relieve a pressure difference between the inside and outside of the battery pack. The blocking disk means is mounted on the second passage to close the second passage, and is broken when gas over a certain pressure is ejected from the battery pack into the second passage.
또한, 상기의 배터리 팩용 벤팅 디바이스에 있어서, 상기 하우징수단은하우징과, 캡을 구비하는 것이 바람직하다. 상기 하우징은 상기 배터리 팩과 연통될 수 있도록 일단이 개방되고 상기 멤브레인막이 장착될 수 있도록 개구부가 형성되어 상기 제1통로부를 형성시키는 제1케이스와, 상기 배터리 팩과 연통되도록 일단 및 타단이 개방되고 내부에 상기 차단디스크수단이 장착되는 제2케이스를 구비하여 상기 배터리 팩에 장착된다. 상기 캡은 상기 제2케이스를 통하여 상기 제2통로부가 형성되도록 통풍구가 형성되어 상기 하우징에 장착된다.Further, in the venting device for a battery pack, the housing means preferably includes a housing and a cap. The housing has one end open to communicate with the battery pack and an opening formed to allow the membrane film to be mounted therein to form the first passage, and one end and the other end open to communicate with the battery pack. A second case in which the blocking disk means is mounted is provided and mounted on the battery pack. The cap is mounted to the housing with a vent formed through the second case so that the second passage is formed.
또한, 상기의 배터리 팩용 벤팅 디바이스에 있어서, 상기 제2케이스는 상기 배터리 팩에서 분출되는 가스가 유입될 수 있도록 일단이 개방되어 상기 제1케이스의 내부에 장착된 내측원통과, 상기 차단디스크수단의 일면의 일측을 지지할 수 있게 상기 내측원통의 내면에 결합된 지지구를 구비하는 것이 바람직하다. 이 경우 상기 캡은 상기 차단디스크수단의 타면의 일측을 지지할 수 있는 삽입부를 구비한다.In addition, in the venting device for a battery pack, the second case has one end opened so that gas ejected from the battery pack can flow in, and the inner cylinder mounted inside the first case, and the blocking disk means It is preferable to have a support coupled to an inner surface of the inner cylinder to support one side of one surface. In this case, the cap has an insertion portion capable of supporting one side of the other surface of the blocking disk means.
또한, 상기의 배터리 팩용 벤팅 디바이스에 있어서, 상기 차단디스크수단은 제1테프론막과, 디스크판과, 제2테프론막을 구비하는 것이 바람직하다. 상기 제1테프론막은 상기 가스가 분출되면 파단될 수 있도록 얇으며 상기 내측원통을 밀폐시킨다. 상기 디스크판은 상기 압력 이상의 가스가 분출되면 파단될 수 있도록 절개되어 상기 제1테프론막의 일면을 지지한다. 상기 제2테프론막은 상기 가스가 분출되면 파단될 수 있도록 절개선이 형성되어 상기 제1테프론막의 타면을 보호한다.Further, in the above battery pack venting device, it is preferable that the blocking disk means includes a first Teflon film, a disk plate, and a second Teflon film. The first Teflon film is thin enough to break when the gas is ejected and seals the inner cylinder. The disk plate supports one surface of the first Teflon film by being incised so that it can be broken when a gas having a pressure higher than the pressure is ejected. An incision is formed in the second Teflon film so that it can be broken when the gas is ejected to protect the other surface of the first Teflon film.
또한, 상기 배터리 팩용 벤팅 디바이스에 있어서, 상기 캡은 외부에서 상기 통풍구로 유입된 상기 이물질의 속도를 감소시키기 위하여 상기 통풍구로 유입되는 이물질과 충돌할 수 있도록 상기 내측 원통의 방향으로 돌기된 감쇄돌기를 더 구비하는 것이 바람직하다.In addition, in the venting device for the battery pack, the cap includes a damping protrusion protruding in the direction of the inner cylinder to collide with the foreign matter flowing into the ventilation hole in order to reduce the speed of the foreign matter flowing into the ventilation hole from the outside. It is desirable to provide more.
또한, 상기의 배터리 팩용 벤팅 디바이스에 있어서, 상기 캡은 상기 제1케이스에 볼트로 고정되며, 상기 개구부에 장착된 멤브레인막을 보호하기 위하여 상기 멤브레인으로 공기가 통할 수 있게 상기 멤브레인막을 감싸는 보강대를 더 구비하는 것이 바람직하다.In addition, in the venting device for a battery pack, the cap is fixed to the first case with bolts, and in order to protect the membrane membrane mounted in the opening, a reinforcing bar is further provided to surround the membrane membrane so that air can flow through the membrane. It is desirable to do
본 발명에 의하면, 배터리 팩의 이상으로 가스 분출 시에는 차단디스크수단이 파열되어 차단디스크수단을 관통하여 가스가 외부로 분출될 수 있다. 그리고 배터리 팩의 온도가 상승하여 내외부의 압력차가 발생되면 멤브레인막을 통하여 공기가 유입 또는 유출되어 배터리 팩의 내외부 압력차를 해소시킬 수 있다.According to the present invention, when gas is ejected due to an abnormality of the battery pack, the blocking disk means is ruptured, and gas can be ejected to the outside through the blocking disk means. In addition, when the temperature of the battery pack rises and a pressure difference between the inside and outside is generated, air may flow in or out through the membrane to eliminate the pressure difference between the inside and outside of the battery pack.
도 1은 본 발명에 따른 배터리 팩용 벤팅 디바이스의 일 실시예의 사시도,1 is a perspective view of an embodiment of a venting device for a battery pack according to the present invention;
도 2는 도 1에 도시된 실시예의 분리사시도,Figure 2 is an exploded perspective view of the embodiment shown in Figure 1;
도 3은 도 1에 도시된 실시예의 단면도이다.Figure 3 is a cross-sectional view of the embodiment shown in Figure 1;
10 : 하우징수단 10a : 제1통로부10: housing means 10a: first passage part
10b : 제2통로부 11 : 제1케이스10b: second passage 11: first case
11a : 턱 11b : 개구부11a: jaw 11b: opening
13 : 제2케이스 14 : 내측원통13: second case 14: inner cylinder
16 : 지지구 18 : 캡16: support 18: cap
18a : 고리 19a, 19b, 19c : 통풍구18a: rings 19a, 19b, 19c: vents
21 : 삽입부 22 : 감쇄돌기21: insertion part 22: damping protrusion
25 : 멤브레인막 30 : 차단디스크수단25: membrane membrane 30: blocking disk means
31 : 제1테프론막 33 : 디스크판31: first Teflon film 33: disk plate
33a : 절개부 35 : 제2테프론막33a: cutout 35: second Teflon film
35a : 절개선 40 : 오링35a: incision 40: O-ring
도 1 내지 도 3을 참조하여 본 발명에 따른 배터리 팩용 벤팅 디바이스의 일 실시예를 설명한다.An embodiment of a venting device for a battery pack according to the present invention will be described with reference to FIGS. 1 to 3 .
본 발명에 따른 배터리 팩용 벤팅 디바이스는 하우징수단(10)과, 멤브레인막(25)과, 차단디스크수단(30) 및 오링(40)을 포함한다.A venting device for a battery pack according to the present invention includes a housing means 10, a membrane membrane 25, a blocking disk means 30 and an O-ring 40.
하우징수단(10)은 배터리 팩(미도시)에 장착되어 배터리 팩의 압력차를 해소시키기 위하여 공기를 유입 및 배출시키는 제1통로부(10a)와, 베터리 팩에서 분출되는 가스를 배출시키기 위한 제2통로부(10b)를 제공한다. 이를 위해서 하우징수단(10)은 제1케이스(11)와, 제2케이스(13)와, 캡(18)을 구비한다.The housing means 10 is mounted on a battery pack (not shown) and includes a first passage portion 10a for introducing and discharging air to eliminate the pressure difference between the battery pack and a device for discharging gas ejected from the battery pack. Two passages 10b are provided. To this end, the housing means 10 includes a first case 11, a second case 13, and a cap 18.
제1케이스(11)는 제1통로부(10a)를 형성하기 위하여 배터리 팩의 내부와 연통될 수 있게 일단이 개방되고 공기가 유동될 수 있도록 일측에 개구부(11b)가 형성된다. 그리고 제1케이스(11)의 외주에는 캡(18)의 고리(18a)가 결합되기 위한 턱(11a)이 형성된다.The first case 11 has one end open to communicate with the inside of the battery pack to form the first passage 10a, and an opening 11b is formed on one side to allow air to flow. And, on the outer circumference of the first case 11, a jaw 11a is formed to which the ring 18a of the cap 18 is coupled.
제2케이스(13)는 제2통로부(10b)를 제공한다. 이를 위하여 제2케이스(13)는 내측원통(14)과 지지구(16)를 구비한다. The second case 13 provides a second passage 10b. To this end, the second case 13 includes an inner cylinder 14 and a support 16 .
내측원통(14)은 일단과 타단이 모두 개방되어 일단으로 배터리 팩에서 분출되는 가스가 유입될 수 있도록 제1케이스(10)의 내부에 장착된다. 이때 타단은 제1케이스(10)에서 노출된다. 그래서 내측원통(14)의 일단으로 유입된 가스는 타단으로 배출되어 제2통로부(10b)를 형성한다.The inner cylinder 14 is mounted inside the first case 10 so that both one end and the other end are open so that gas ejected from the battery pack can flow in through one end. At this time, the other end is exposed from the first case (10). Thus, the gas introduced into one end of the inner cylinder 14 is discharged to the other end to form the second passage 10b.
지지구(16)는 차단디스크수단(30)의 일면을 지지할 수 있도록 내측원통(14)의 내부에 결합된다. 이때 지지구(16)는 내측원통(14)의 일단으로 유입된 가스가 통과할 수 있도록 차단디스크수단(30)의 일면을 지지해야 한다. 본 실시예의 경우 지지구(16)는 3개의 발 형태로 내측원통(14)의 내면에 결합된다.The support member 16 is coupled to the inside of the inner cylinder 14 so as to support one surface of the blocking disk means 30 . At this time, the support 16 should support one surface of the blocking disk means 30 so that the gas introduced into one end of the inner cylinder 14 can pass. In this embodiment, the support 16 is coupled to the inner surface of the inner cylinder 14 in the form of three feet.
캡(18)은 외부에서 이물질이 차단디스크수단(30)으로 유입되는 것을 막아주는 한편 가스가 분출되었을 때 분출된 가스를 외부로 배출될 수 있도록 제2통로부(10b)를 형성한다. 이를 위해서 캡(18)은 내측원통(14)의 타단을 막는 한편 복수의 통풍구(19a, 19b, 19c)가 형성된다. 즉 캡(18)은 이물질이 내측원통(14)의 타단으로 유입되어 차단디스크수단(30)에 충격을 가하는 것을 방지하기 위하여 내측원통(14)의 타단에 장착되는 한편, 내측원통(14)의 타단에서 분출되는 가스가 외부로 배출될 수 있도록 통풍구(19a, 19b, 19c)가 형성된다. 그래서 통풍구(19a, 19b, 19c)는 제2통로부(10b)를 형성한다. 통풍구(19a, 19b, 19c)는 가능하면 이물질이 유입되지 않도록 얇고 가는 슬릿 형태로 형성되는 것이 바람직하다. 그리고 캡(18)은 삽입부(21), 감쇄돌기(22)와, 고리(18a)와, 보강대(23)를 구비한다. The cap 18 prevents foreign substances from entering the blocking disk means 30 from the outside and forms a second passage 10b so that the ejected gas can be discharged to the outside when the gas is ejected. To this end, the cap 18 blocks the other end of the inner cylinder 14, while a plurality of vents 19a, 19b, and 19c are formed. That is, the cap 18 is mounted on the other end of the inner cylinder 14 to prevent foreign matter from entering the other end of the inner cylinder 14 and impacting the blocking disk means 30, while the inner cylinder 14 Ventilation holes 19a, 19b, and 19c are formed so that gas ejected from the other end can be discharged to the outside. Thus, the vents 19a, 19b and 19c form the second passage 10b. Ventilation ports 19a, 19b, and 19c are preferably formed in the form of thin and thin slits to prevent inflow of foreign substances, if possible. The cap 18 includes an insertion portion 21, a damping protrusion 22, a ring 18a, and a reinforcing bar 23.
삽입부(21)는 내측원통(14)의 타단으로 삽입되어 차단디스크수단(30)의 타면을 지지한다. The insertion part 21 is inserted into the other end of the inner cylinder 14 to support the other surface of the blocking disk means 30.
감쇄돌기(22)는 캡(18)으로 이물질이 유입되는 것이 차단되지만, 통풍구(19b)로 이물질이 유입될 경우 이물질에 의해 차단디스크수단(30)에 충격이 가해지는 것을 방지하는 역할을 한다. 예를들면 통풍구(19b)로 고압의 물이 유입될 경우 물은 차단디스크수단(30)과 충돌할 수 있다. 이때 통풍구(19c)의 경우 통풍구(19c)의 상부에 캡(18)이 지붕을 형성하여 고압의 물이 통풍구(19c)로 직접 유입되지 않도록 하고, 통풍구(19b)의 경우 삽입부(12)의 상부에 형성되어 물이 유입되더라도 삽입부(12)에 충돌되도록 한다. 그래서 통풍구(19b, 19c)는 가능하면 유입되는 이물질이 직접 차단디스크수단(30)에 충돌하지 않도록 형성된다. 그러나 통풍구(19a)와 같이 이것이 어려운 경우에는 감쇄돌기(22)에 충돌할 수 있도록 감쇄돌기(22)가 통풍구(19a)의 앞에 형성된다. 그래서 통풍구(19a)로 이물질이 유입되면 먼저 감쇄돌기(22)에 충돌한 후 그 유입속도가 감소되어 차단디스크수단(30)으로 떨어지므로 충격을 감소시킬 수 있다.The damping protrusion 22 blocks foreign matter from entering the cap 18, but serves to prevent impact from being applied to the blocking disk means 30 by the foreign matter when foreign matter flows into the vent 19b. For example, when high-pressure water flows into the ventilation hole 19b, the water may collide with the blocking disk means 30. At this time, in the case of the ventilation hole 19c, the cap 18 forms a roof on the upper part of the ventilation hole 19c to prevent high-pressure water from flowing directly into the ventilation hole 19c, and in the case of the ventilation hole 19b, the insertion part 12 It is formed on the top so that even if water flows in, it collides with the insertion part 12. Therefore, the ventilation holes 19b and 19c are formed so that the inflowing foreign matter does not directly collide with the blocking disk means 30, if possible. However, when this is difficult, such as the ventilation hole 19a, the damping protrusion 22 is formed in front of the vent 19a so as to collide with the damping protrusion 22. Therefore, when a foreign substance flows into the ventilation hole 19a, it first collides with the damping protrusion 22, and then the inflow speed is reduced and falls to the blocking disk means 30, thereby reducing the impact.
고리(18a)는 캡(18)이 제1케이스(11)에 고정될 수 있도록 턱(11a)에 걸릴 수 있도록 형성된다. 캡(18)은 고리(18a)가 턱(11a)에 걸리는 한편, 본 실시예의 경우 캡(18)의 고정력을 높이기 위하여 볼트로 제1케이스(11)에 고정된다.The ring 18a is formed to be caught on the jaw 11a so that the cap 18 can be fixed to the first case 11. The cap 18 is fixed to the first case 11 with bolts in order to increase the fixing force of the cap 18 in the case of the present embodiment, while the ring 18a is caught on the jaw 11a.
보강대(23)는 제1케이스(11)의 개구부(11b)에 장착되는 멤브레인막(25)을 보호하는 역할을 한다. 그래서 캡(18)이 제1케이스(11)에 결합될 때 멤브레인막(25)을 감싸도록 형성되며, 이때 멤브레인막(25)으로 공기가 통할 수 있게 형성된다.The reinforcing bar 23 serves to protect the membrane 25 mounted in the opening 11b of the first case 11 . So, when the cap 18 is coupled to the first case 11, it is formed to surround the membrane film 25, and at this time, it is formed to allow air to pass through the membrane film 25.
멤브레인막(25)은 제1케이스(11)의 개구부(11b)에 장착되어 배터리 팩의 내부와 외부의 압력차를 해소하기 위하여 공기가 유동될 수 있다.The membrane film 25 is mounted on the opening 11b of the first case 11 and allows air to flow in order to relieve a pressure difference between the inside and outside of the battery pack.
차단디스크수단(30)은 일면은 지지구(16)로 지지되며 타면은 삽입부(21)로 지지되도록 내측원통(14)의 내부에 장착된다. 이때 차단디스크수단(30)은 내부원통(14)을 씰링시키지만 배터리 팩에서 일정 압력 이상의 가스가 분출되면 분출된 가스를 배출시킬 수 있도록 가스 압력으로 파단될 수 있어야 한다. 이를 위해서 본 실시예의 경우 차단디스크수단(30)은 제1테프론막(31)과, 디스크판(33)과, 제2테프론막(35)을 구비한다. 제1테프론막(31)은 내측원통(14)을 밀폐시킨다. 이때 제1테프론막(31)은 가스가 분출되면 쉽게 찢어질 수 있도록 얇게 형성된다. 디스크판(33)은 서스 등의 얇은 박판으로 형성되어 제1테프론막(31)을 지지하도록 제1테프론막(31)의 일면에 위치한다. 그리고 디스크판(33)은 일정 압력 이상의 가스가 분출되면 파단될 수 있도록 절개부(33a)가 형성된다. 제2테프론막(35)은 제1테프론막(31)의 타면을 보호하도록 제1테프론막(31)의 타면에 위치한다. 그리고 제2테프론막(35)은 가스가 분출되면 파단될 수 있도록 절개선(35a)이 형성된다. 따라서 차단디스크수단(30)은 가스가 분출되지 아니하면 제1테프론막(31)에 의하여 내측원통(14)을 밀폐시키지만 가스가 분출되면 파단되어 가스가 제2통로부(10b)를 통하여 배출될 수 있다.The blocking disk means 30 is mounted inside the inner cylinder 14 so that one side is supported by the support 16 and the other side is supported by the insertion part 21. At this time, the blocking disk means 30 seals the inner cylinder 14, but should be able to be broken by gas pressure so that the ejected gas can be discharged when gas over a certain pressure is ejected from the battery pack. To this end, in the present embodiment, the blocking disk means 30 includes a first Teflon film 31, a disk plate 33, and a second Teflon film 35. The first Teflon film 31 seals the inner cylinder 14 . At this time, the first Teflon film 31 is formed thin so that it can be easily torn when gas is ejected. The disk plate 33 is formed of a thin plate such as Sus and is positioned on one side of the first Teflon film 31 to support the first Teflon film 31 . In addition, the disk plate 33 is formed with a cutout 33a so that it can be broken when gas over a certain pressure is ejected. The second Teflon film 35 is positioned on the other surface of the first Teflon film 31 to protect the other surface of the first Teflon film 31 . In addition, the second Teflon film 35 is formed with an incision 35a so that it can be broken when gas is ejected. Therefore, the blocking disc means 30 seals the inner cylinder 14 by the first Teflon film 31 when the gas is not ejected, but is broken when the gas is ejected so that the gas is discharged through the second passage 10b. can
오링(40)은 하우징수단(10)이 배터리 팩에 장착될 때 수밀을 시킬 수 있도록 외부하우징(11)의 일단에 장착된다.The O-ring 40 is mounted on one end of the outer housing 11 to make the housing means 10 watertight when mounted on the battery pack.
본 실시예의 벤팅 디바이스가 배터리 팩에 장착된 경우, 멤브레인막(25)으로 공기가 유동될 수 있다. 그래서 배터리 팩의 압력이 올라가거나 내려가면 공기가 멤브레인막(25)으로 배출되거나 유입된다. 즉 공기의 브리딩(breathing)이 가능하다. 한편, 이벤트의 발생으로 가스가 분출되면 분출된 가스가 멤브레인막(25)으로 일시에 배출될 수 없으며, 이때에는 내측원통(14)을 통하여 분출된다. 그러면 분출된 가스에 의하여 차단디스크수단(30)이 파단되고, 가스는 통풍구(19a, 19b, 19c)를 통하여 외부로 배출된다.When the venting device of the present embodiment is mounted on the battery pack, air may flow to the membrane 25 . Therefore, when the pressure of the battery pack increases or decreases, air is discharged or introduced into the membrane membrane 25 . That is, breathing of air is possible. On the other hand, when the gas is ejected due to the occurrence of an event, the ejected gas cannot be discharged to the membrane film 25 at once, and is ejected through the inner cylinder 14 at this time. Then, the blocking disk means 30 is broken by the ejected gas, and the gas is discharged to the outside through the vents 19a, 19b, and 19c.
따라서 본 실시예에 의하면 공기의 브리딩(breathing)이 가능할 뿐만 아니라 가스 배출이 가능하다.Therefore, according to this embodiment, not only air breathing (breathing) is possible, but also gas discharge is possible.

Claims (6)

  1. 배터리 팩의 내부와 외부가 연통되는 제1통로부와, 상기 배터리 팩의 내부와 상기 외부가 연통되는 제2통로부가 형성되어 상기 배터리 팩에 장착된 하우징수단과,A housing means mounted on the battery pack having a first passage through which the inside and outside of the battery pack communicate, and a second passage through which the inside and outside of the battery pack communicate, and
    상기 제1통로부에 장착되어 상기 배터리 팩의 내부와 외부의 압력차를 해소하기 위하여 공기가 유동될 수 있는 멤브레인막과,a membrane membrane mounted on the first passage part through which air can flow to eliminate a pressure difference between the inside and outside of the battery pack;
    상기 제2통로부를 폐쇄할 수 있도록 상기 제2통로부에 장착되고 상기 배터리 팩에서 상기 제2통로부로 일정한 압력 이상의 가스가 분출되면 파단되는 차단디스크수단을 포함하는 것을 특징으로 하는 배터리 팩용 벤팅 디바이스.A venting device for a battery pack comprising a blocking disk means mounted on the second passage to close the second passage and broken when gas over a certain pressure is ejected from the battery pack into the second passage.
  2. 제1항에 있어서, 상기 하우징수단은The method of claim 1, wherein the housing means
    상기 배터리 팩과 연통될 수 있도록 일단이 개방되고 상기 멤브레인막이 장착될 수 있도록 개구부가 형성되어 상기 제1통로부를 형성시키는 제1케이스와, 상기 배터리 팩과 연통되도록 일단 및 타단이 개방되고 내부에 상기 차단디스크수단이 장착되는 제2케이스를 구비하여 상기 배터리 팩에 장착되는 하우징과,A first case having one end open to communicate with the battery pack and an opening formed to mount the membrane film to form the first passage, and one end and the other end open to communicate with the battery pack and the inside of the first case. A housing having a second case in which a blocking disk means is mounted and mounted on the battery pack;
    상기 제2케이스를 통하여 상기 제2통로부가 형성되도록 통풍구가 형성되어 상기 하우징에 장착되는 캡을 구비하는 것을 특징으로 하는 배터리 팩용 벤팅 디바이스.The venting device for a battery pack, characterized in that it includes a cap mounted on the housing with a ventilation hole formed therethrough such that the second passage is formed through the second case.
  3. 제2항에 있어서,According to claim 2,
    상기 제2케이스는 상기 배터리 팩에서 분출되는 가스가 유입될 수 있도록 일단이 개방되어 상기 제1케이스의 내부에 장착된 내측원통과, 상기 차단디스크수단의 일면의 일측을 지지할 수 있게 상기 내측원통의 내면에 결합된 지지구를 구비하며,The second case has one end open so that gas ejected from the battery pack can flow in, and the inner cylinder can support an inner cylinder mounted inside the first case and one side of one surface of the blocking disk means. Equipped with a support coupled to the inner surface of,
    상기 캡은 상기 차단디스크수단의 타면의 일측을 지지할 수 있는 삽입부를 구비하는 것을 특징으로 하는 배터리 팩용 벤팅 디바이스.The cap is a venting device for a battery pack, characterized in that it has an insertion portion capable of supporting one side of the other surface of the blocking disk means.
  4. 제3항에 있어서, 상기 차단디스크수단은The method of claim 3, wherein the blocking disk means
    상기 가스가 분출되면 파단될 수 있도록 얇으며 상기 내측원통을 밀폐시키는 제1테프론막과,a first Teflon film that is thin enough to be broken when the gas is ejected and that seals the inner cylinder;
    상기 압력 이상의 가스가 분출되면 파단될 수 있도록 절개되어 상기 제1테프론막의 일면을 지지하는 디스크판과,a disk plate that is cut to support one surface of the first Teflon film so as to be broken when a gas having a pressure higher than the pressure is ejected;
    상기 가스가 분출되면 파단될 수 있도록 절개선이 형성되어 상기 제1테프론막의 타면을 보호하는 제2테프론막을 구비하는 것을 특징으로 하는 배터리 팩용 벤팅 디바이스. The venting device for a battery pack, characterized in that it includes a second Teflon film to protect the other surface of the first Teflon film by forming an incision so as to be broken when the gas is ejected.
  5. 제4항에 있어서,According to claim 4,
    상기 캡은 외부에서 상기 통풍구로 유입된 상기 이물질의 속도를 감소시키기 위하여 상기 통풍구로 유입되는 이물질과 충돌할 수 있도록 상기 내측 원통의 방향으로 돌기된 감쇄돌기를 더 구비하는 것을 특징으로 하는 배터리 팩용 벤팅 디바이스.The cap is venting for a battery pack, characterized in that it further comprises a damping protrusion protruding in the direction of the inner cylinder to collide with the foreign matter flowing into the ventilation hole in order to reduce the speed of the foreign matter flowing into the ventilation hole from the outside. device.
  6. 제5항에 있어서, According to claim 5,
    상기 캡은 상기 제1케이스에 볼트로 고정되며, 상기 개구부에 장착된 멤브레인막을 보호하기 위하여 상기 멤브레인막으로 공기가 통할 수 있게 상기 멤브레인을 감싸는 보강대를 더 구비하는 것을 특징으로 하는 배터리 팩용 벤팅 디바이스.The cap is fixed to the first case with bolts, and further includes a reinforcing bar surrounding the membrane to allow air to flow through the membrane to protect the membrane mounted in the opening. Venting device for a battery pack.
PCT/KR2022/002528 2022-02-21 2022-02-21 Venting device for battery pack WO2023157999A1 (en)

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