WO2020180066A1 - Liquid detection sensor for battery pack for electric vehicles - Google Patents

Liquid detection sensor for battery pack for electric vehicles Download PDF

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Publication number
WO2020180066A1
WO2020180066A1 PCT/KR2020/002947 KR2020002947W WO2020180066A1 WO 2020180066 A1 WO2020180066 A1 WO 2020180066A1 KR 2020002947 W KR2020002947 W KR 2020002947W WO 2020180066 A1 WO2020180066 A1 WO 2020180066A1
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WO
WIPO (PCT)
Prior art keywords
terminal
sensing
detection sensor
sensing unit
support
Prior art date
Application number
PCT/KR2020/002947
Other languages
French (fr)
Korean (ko)
Inventor
김훈
Original Assignee
암페놀센싱코리아 유한회사
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Publication of WO2020180066A1 publication Critical patent/WO2020180066A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/242—Mounting arrangements for electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/0007—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm for discrete indicating and measuring
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/0046—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm with a stationary probe, where a liquid specimen is separated from the mean mass and measured
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • 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 liquid detection sensor for a battery pack for an electric vehicle, and more particularly, a battery management system (BMS) by detecting when a liquid rises above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted.
  • BMS battery management system
  • Battery Management System to prevent accidents in which a fire occurs due to a short circuit of a battery cell by the generated liquid. It relates to a liquid detection sensor of a battery pack for an electric vehicle.
  • eco-friendly vehicles such as electric vehicles or hybrid vehicles have a battery pack equipped with a plurality of battery cell modules.
  • the battery pack includes a water-cooled or air-cooled cooler, which serves to maintain a constant temperature by lowering heat generated when the battery is used or charged.
  • the present invention was invented to solve the above problems, and an object of the present invention is to detect when a liquid is filled above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted, and the battery management system (BMS : To provide a liquid detection sensor for battery packs for electric vehicles, which prevents accidents in advance of fire by causing a short circuit of the battery cells by the generated liquid.
  • BMS battery management system
  • the present invention for achieving the above object is a main body consisting of a sensing unit for performing sensing by being fixedly mounted with two terminal units, and a fixed unit formed on one side of the sensing unit to fix the position of the sensing unit; And a terminal part which is fixed to the two wire terminals in parallel, and the tip part is installed spaced apart from the bottom end of the sensing part to an upper part by a predetermined height, and is molded in the sensing part,
  • the sensing unit The sensing unit,
  • the sensing unit is characterized in that it is formed by further forming a blocking wall portion protruding from the center of the bottom plate with the two terminal portions therebetween.
  • the sensing unit is characterized in that a support jaw is formed at both ends of one side of the support unit, and a fitting protrusion is formed at an upper end of the guide hook.
  • the terminal portion includes a coupling piece for fixing and coupling the terminal of the wire and the terminal of the resistance element together, a locking protrusion that is locked to the support jaw of the sensing unit when the terminal is inserted, and a guide when locking the locking protrusion It characterized in that it is composed of a locking hole through which the fitting protrusion of the hook is fixed.
  • the present invention detects when a liquid rises above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted, and informs the battery management system (BMS), whereby the battery cell is shorted by the generated liquid. It provides the effect of preventing fires that may occur in advance.
  • BMS battery management system
  • the present invention solves the problem that the sensor itself malfunctions due to dew or moisture inside the battery pack caused by a temperature difference with the outside.
  • FIG. 1 is a perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention
  • FIG. 2 is an exploded perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention
  • FIG. 3 is a partial cut-away perspective view of the main body according to the present invention.
  • Figure 4 (a) (b) is a detailed configuration diagram of a terminal part in the present invention.
  • Figure 5 (a) (b) is a side cross-sectional view and a front cross-sectional view of the main part of the liquid detection sensor of the present invention
  • FIG. 6 is a bottom perspective view of the main body according to the present invention.
  • FIG. 8 is a block diagram of the liquid detection sensor of the present invention mounted on a base plate of a battery pack.
  • FIG. 1 is a perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention
  • FIG. 2 is an exploded perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention.
  • the liquid detection sensor of the battery pack for an electric vehicle of the present invention As shown, the liquid detection sensor of the battery pack for an electric vehicle of the present invention
  • It includes a body portion 110, a terminal portion 120, an electric wire 130, a resistance element 140, and a molding portion 150.
  • the main body part 110 is formed as a sensing part 111 to perform sensing by fixing two terminal parts 120 and one side of the sensing part 111 to fix the position of the sensing part 111 It includes a fixing portion 113 that makes.
  • the sensing unit 111 includes a mounting groove 112 molded with a resin after the terminal unit 120 is inserted and mounted as shown in FIG. 3, a bottom plate portion 114 formed on the bottom of the mounting groove 112, and , Two support portions 115 supporting each of the two terminal portions 120 vertically installed and inserted at a predetermined interval to the top of the bottom plate portion 114, and the lower bottom plate portion 114 of the support portion 115 A through part 116 which is perforated to pass through the terminal part 120, a guide hook 117 that is installed opposite to the support part 115 to fix the inserted terminal part 120, and the sensing part ( An opening part 118 formed in all directions on the bottom of 111 to allow the inflow and outflow of liquid, and a blocking wall part 119 protruding from the center of the bottom plate part 114 with the two terminal parts 120 interposed therebetween Includes.
  • Support protrusions 115a are formed at both ends of one side of the support part 115 to limit the insertion position of the terminal part 120.
  • a fitting protrusion 117a is formed on the upper end of the guide hook 117 as shown in FIG. 5 to allow the terminal part 120 to be fixed at a limited insertion position.
  • the fixing part 113 is fixed through a fastening screw 161 to the fixing member 160 fixed to the base plate 170 of the battery pack as shown in FIGS. 7 and 8 by having a fastening hole 113a formed therein. It is structured to be.
  • a positioning protrusion 113b is further formed on the bottom surface of the fixing part 113 as shown in FIG. 6 to be configured to hold the position when the fixing member 160 is coupled and fixed.
  • the terminal portion 120 includes a coupling piece 121 for fixing and coupling the terminal of the wire 130 and the terminal of the resistance element 140 together, and the sensing portion 111 when the terminal portion 120 is inserted.
  • the locking protrusion 122 is fixed to the support protrusion 115a of the support 115, and the locking hole 123 through which the locking protrusion 117a of the guide hook 117 is locked when the locking protrusion 122 is locked. ).
  • the terminal of the wire 130 and the resistance element 140 is fixed to the coupling piece 121 by a crimping method.
  • the terminal unit 120 is a mounting groove of the sensing unit 111 as shown in Fig. 5(a) and (b).
  • the tip of the terminal portion 120 is exposed to the lower portion of the bottom plate portion 114, and at the same time, the locking protrusion 122 is supported by the support portion 115. It is stopped at a certain position while being caught on the jaw 115a.
  • the terminal part 120 is the support part 115 and the guide hook 117 It is completely fixed in between.
  • the inside of the mounting groove 122 is molded with an epoxy resin or the like to form the molding part 150, thereby preventing foreign substances from penetrating and maintaining a more rigid fixed state.
  • the terminal portion 120 coupled to the main body portion 110 maintains a state positioned above a predetermined height h from the bottom surface of the sensing portion 111 as shown in FIG. 5.
  • the terminal portion 120 when a liquid is in contact between the two terminal portions 120, that is, when a liquid is filled with a predetermined height (h) or more from the bottom surface, the terminal portion 120 is energized and the total resistance is caused by the resistance elements 140 connected in parallel. The value is lowered and the detection of the liquid is performed.
  • the blocking wall portion 118 is formed protruding in the center of the bottom plate portion 114 with the two terminal portions 120 therebetween.
  • the blocking wall portion 118 blocks it by using a surface tension phenomenon, thereby preventing a malfunction in which the two terminal portions 120 are energized.
  • the terminals of the two wires 130 are arranged on one side of the coupling piece 121 of the terminal unit 120, and the terminals of the resistance element 140 are arranged on the other side.
  • the coupling piece 121 is compressed so that the two terminal portions 120, the wire 130, and the resistance element 140 are coupled as shown in FIG. 4(b).
  • the terminal portion 120 is inserted into the sensing portion 111 of the body portion 110, the mounting groove 112.
  • the terminal portion 120 is inserted into the through hole 116 through the support portion 115 so that the tip portion of the terminal portion 120 is exposed to the lower portion of the bottom plate portion 114, and at the same time, the locking protrusion 122 is the support portion 115 It is stopped at a certain position while being caught on the supporting jaw 115a of.
  • the locking hole 123 of the terminal part 120 is automatically inserted into the fitting protrusion 117a of the sensing part 111 and the guide hook 117, so that the terminal part 120 has the support part 115 and the guide hook 117 It is completely fixed in between.
  • the combined state at this time is configured as shown in the side cross-sectional view (a) and the front cross-sectional view (b) of FIG. 5, and the terminal portion 120 coupled to the body portion 110 is at a predetermined height (h) from the bottom surface of the sensing portion 111 ) It is located in the upper part.
  • the inside of the mounting groove 122 is molded (molding part 150) with an epoxy resin to complete the manufacture of the liquid detection sensor.
  • the liquid detection sensor manufactured in this way is fixedly coupled to the fixing member 160 fixedly installed on the base plate 170 of the battery pack as shown in FIG. 8 through a fastening screw 161 as shown in FIG. 7.
  • the bottom surface of the sensing unit 111 matches the base plate 170 of the battery pack.
  • the liquid detection sensor detects the liquid, and the detected leakage detection signal is transmitted to a battery management system (BMS), not shown, through the electric wire 130.
  • BMS battery management system
  • the generated moisture penetrates through the bottom plate portion 114 of the sensor unit 111. At this time, the generated moisture Due to the surface tension caused by the blocking wall portion 118, it does not pass to the opposite terminal portion 120.
  • the present invention detects and informs the battery management system (BMS) when a liquid rises above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted, This provides an effect of preventing fire that may occur due to short circuit.
  • BMS battery management system
  • the present invention solves the problem that the sensor itself malfunctions due to dew or moisture inside the battery pack caused by a temperature difference with the outside.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
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  • Manufacturing & Machinery (AREA)
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Abstract

The present invention relates to a liquid detection sensor for a battery pack for electric vehicles, which is located in a battery pack in which a plurality of battery cell modules are mounted, and detects when liquid rises from the bottom surface to a certain height or above and notifies a battery management system (BMS) side about the detection, thereby preventing an accident in which a fire breaks out due to a battery cell being short-circuited by generated liquid. The liquid detection sensor comprises: a main body unit (110) including a sensing unit (111) in which two terminal units (120) are fixedly mounted to perform sensing, and a fixing unit (113) formed on one side of the sensing unit (111) to fix the location of the sensing unit (111); and the terminal units (120) fixing a resistance element (140) in parallel to two terminals of a wire (130) and being molded to the sensing unit (111), in which each front end portion thereof is installed to be spaced apart at a certain height (h) upward from a bottom end portion of the sensing unit (111).

Description

전기 차량용 배터리팩의 액체감지센서Liquid detection sensor for electric vehicle battery pack
본 발명은 전기 차량용 배터리팩의 액체감지센서에 관한 것으로, 더욱 상세하게는 다수개의 배터리셀 모듈이 장착된 배터리팩 내부의 위치하여 저면으로부터 일정 높이 이상 액체가 차오르면 이를 감지하여 배터리관리시스템(BMS: Battery Management System) 측으로 알려줌으로써, 발생된 액체에 의해 배터리셀이 쇼트를 일으켜 화재가 발생되는 사고를 미연에 방지하도록 한 전기 차량용 배터리팩의 액체감지센서에 관한 것이다.The present invention relates to a liquid detection sensor for a battery pack for an electric vehicle, and more particularly, a battery management system (BMS) by detecting when a liquid rises above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted. : Battery Management System) to prevent accidents in which a fire occurs due to a short circuit of a battery cell by the generated liquid. It relates to a liquid detection sensor of a battery pack for an electric vehicle.
일반적으로 전기자동차나 하이브리드 자동차와 같은 친환경 차량은 다수개의 배터리셀 모듈이 장착된 배터리팩을 구비한다.In general, eco-friendly vehicles such as electric vehicles or hybrid vehicles have a battery pack equipped with a plurality of battery cell modules.
또한 상기 배터리팩에는 수냉식 또는 공랭식 쿨러를 구비하는데, 상기 쿨러는 배터리의 사용 또는 충전 시 발생되는 열을 낮추어 일정한 온도를 유지하도록 하는 역할을 수행하게 된다.In addition, the battery pack includes a water-cooled or air-cooled cooler, which serves to maintain a constant temperature by lowering heat generated when the battery is used or charged.
그런데, 상기 수냉식 쿨러의 경우, 사용하는 냉각수가 누출되어 배터리셀에서 쇼트(short)가 발생되어 화재로 이어질 수 있는 문제점이 있었다.However, in the case of the water-cooled cooler, there is a problem in that used coolant leaks and a short occurs in the battery cell, which may lead to a fire.
또한, 종래의 배터리팩은 외부와의 온도차에 의해서 발생되는 내부의 이슬 또는 습기가 누수감지센서 자체에 침투하여 센싱 단자 간 쇼트로 인한 오작동이 발생될 소지가 있었다.In addition, in the conventional battery pack, internal dew or moisture generated by a temperature difference with the outside may penetrate into the leak detection sensor itself, causing a malfunction due to a short between sensing terminals.
이러한 오작동은 누수감지센서 하나의 불량으로 인해 배터리팩 전체를 교환해야 되는 심각한 상황이 발생되곤 한다. This malfunction often leads to a serious situation in which the entire battery pack must be replaced due to a failure of one leak detection sensor.
본 발명은 상기한 문제점을 해결하기 위하여 창안된 것으로, 본 발명의 목적은 다수개의 배터리셀 모듈이 장착된 배터리팩 내부의 위치하여 저면으로부터 일정 높이 이상 액체가 차오르면 이를 감지하여 배터리관리시스템(BMS: Battery Management System) 측으로 알려줌으로써, 발생된 액체에 의해 배터리셀이 쇼트를 일으켜 화재가 발생되는 사고를 미연에 방지하도록 한 전기 차량용 배터리팩의 액체감지센서를 제공하는 것에 있다.The present invention was invented to solve the above problems, and an object of the present invention is to detect when a liquid is filled above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted, and the battery management system (BMS : To provide a liquid detection sensor for battery packs for electric vehicles, which prevents accidents in advance of fire by causing a short circuit of the battery cells by the generated liquid.
이와 같은 목적을 달성하기 위한 본 발명은 2개의 단자부가 고정 장착되어 센싱을 수행하는 센싱부와, 상기 센싱부의 일측으로 형성되어 상기 센싱부의 위치를 고정하여 주는 고정부로 이루어진 본체부; 및 2개의 전선 단자에 저항소자를 병렬 고정하고, 선단부가 상기 센싱부의 저면 단부로부터 일정높이 상부로 이격 설치되며 상기 센싱부에 몰딩되는 단자부를 포함하고, The present invention for achieving the above object is a main body consisting of a sensing unit for performing sensing by being fixedly mounted with two terminal units, and a fixed unit formed on one side of the sensing unit to fix the position of the sensing unit; And a terminal part which is fixed to the two wire terminals in parallel, and the tip part is installed spaced apart from the bottom end of the sensing part to an upper part by a predetermined height, and is molded in the sensing part,
상기 센싱부는,The sensing unit,
상기 단자부가 삽입 장착된 후 수지로 몰딩되는 장착홈과, 상기 장착홈의 저면에 형성되는 바닥판부와, 상기 바닥판부의 상단으로 일정간격을 두고 수직 설치되어 삽입되는 2개의 단자부를 각각 지지하는 2개의 지지부와, 상기 지지부의 하부 바닥판부에 천공되어 상기 단자부가 관통되도록 한 관통부와, 상기 지지부에 대향되게 설치되어 삽입되는 단자부를 걸림 고정시켜 주는 가이드후크와, 상기 센싱부의 저면 사방으로 형성되어 액체의 유출입이 가능하도록 한 개방부를 포함하여 된 것을 특징으로 한다.2 supporting a mounting groove molded with resin after the terminal part is inserted and mounted, a bottom plate part formed on the bottom of the mounting groove, and two terminal parts vertically installed and inserted to the top of the bottom plate part at regular intervals And a through-hole through which the terminal is penetrated by being perforated in the lower bottom plate of the support, a guide hook that is installed opposite the support and fixes the inserted terminal, and is formed in all directions of the bottom of the sensing part. It is characterized in that it includes an opening to allow the inflow and outflow of liquid.
또한 본 발명에 따르면 상기 센싱부는 바닥판부의 중앙에 상기 2개의 단자부를 사이에 두고 돌출 형성되는 차단벽부를 더 형성하여 된 것을 특징으로 한다.In addition, according to the present invention, the sensing unit is characterized in that it is formed by further forming a blocking wall portion protruding from the center of the bottom plate with the two terminal portions therebetween.
또한 본 발명에 따르면 상기 센싱부는 상기 지지부의 일측 양단에는 지지턱이 형성되고, 상기 가이드후크의 상단에는 끼움돌기가 형성된 것을 특징으로 한다.In addition, according to the present invention, the sensing unit is characterized in that a support jaw is formed at both ends of one side of the support unit, and a fitting protrusion is formed at an upper end of the guide hook.
또한 본 발명에 따르면 상기 단자부는 전선의 단자와 저항소자의 단자를 함께 고정 결합하는 결합편과, 단자부의 삽입 시 센싱부의 지지부의 지지턱에 걸림 고정되는 걸림돌기와, 상기 걸림돌기의 걸림 고정 시 가이드후크의 끼움돌기가 걸림 고정되는 걸림공으로 구성된 것을 특징으로 한다.In addition, according to the present invention, the terminal portion includes a coupling piece for fixing and coupling the terminal of the wire and the terminal of the resistance element together, a locking protrusion that is locked to the support jaw of the sensing unit when the terminal is inserted, and a guide when locking the locking protrusion It characterized in that it is composed of a locking hole through which the fitting protrusion of the hook is fixed.
이와 같이 본 발명은 다수개의 배터리셀 모듈이 장착된 배터리팩 내부의 위치하여 저면으로부터 일정 높이 이상 액체가 차오르면 이를 감지하여 배터리관리시스템(BMS) 측으로 알려줌으로써, 발생된 액체에 의해 배터리셀이 쇼트되어 발생될 수 있는 화재를 미연에 방지하는 효과를 제공한다.As described above, the present invention detects when a liquid rises above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted, and informs the battery management system (BMS), whereby the battery cell is shorted by the generated liquid. It provides the effect of preventing fires that may occur in advance.
또한 본 발명은 외부와의 온도차에 의해서 발생되는 배터리팩 내부의 이슬 또는 습기에 의해 센서 자체가 오작동하는 문제점을 해결한다.In addition, the present invention solves the problem that the sensor itself malfunctions due to dew or moisture inside the battery pack caused by a temperature difference with the outside.
도 1은 본 발명에 따른 전기 차량용 배터리팩의 액체감지센서의 사시도, 1 is a perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention,
도 2는 본 발명에 따른 전기 차량용 배터리팩의 액체감지센서의 분해 사시도, 2 is an exploded perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention,
도 3은 본 발명에 따른 본체부의 부분 절개 사시도, 3 is a partial cut-away perspective view of the main body according to the present invention,
도 4의 (a)(b)은 본 발명에 단자부의 상세 구성도,Figure 4 (a) (b) is a detailed configuration diagram of a terminal part in the present invention,
도 5의 (a)(b)는 본 발명 액체감지센서의 주요부분의 측단면도 및 정단면도,Figure 5 (a) (b) is a side cross-sectional view and a front cross-sectional view of the main part of the liquid detection sensor of the present invention,
도 6은 본 발명에 따른 본체부의 저면 사시도, 6 is a bottom perspective view of the main body according to the present invention,
도 7는 본 발명 액체감지센서가 고정부재에 체결된 구조,7 is a structure in which the liquid detection sensor of the present invention is fastened to a fixing member,
도 8는 본 발명 액체감지센서가 배터리팩의 베이스 플레이트에 장착된 구성도이다. 8 is a block diagram of the liquid detection sensor of the present invention mounted on a base plate of a battery pack.
이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예를 보다 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 전기 차량용 배터리팩의 액체감지센서의 사시도, 도 2는 본 발명에 따른 전기 차량용 배터리팩의 액체감지센서의 분해 사시도이다. 1 is a perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention, and FIG. 2 is an exploded perspective view of a liquid detection sensor of a battery pack for an electric vehicle according to the present invention.
도시된 바와 같이, 본 발명 전기 차량용 배터리팩의 액체감지센서는, As shown, the liquid detection sensor of the battery pack for an electric vehicle of the present invention,
본체부(110), 단자부(120), 전선(130), 저항소자(140) 및 몰딩부(150)를 포함한다.It includes a body portion 110, a terminal portion 120, an electric wire 130, a resistance element 140, and a molding portion 150.
*상기 본체부(110)는 2개의 단자부(120)가 고정 장착되어 센싱을 수행하는 센싱부(111)와, 상기 센싱부(111)의 일측으로 형성되어 상기 센싱부(111)의 위치를 고정하여 주는 고정부(113)을 포함한다.*The main body part 110 is formed as a sensing part 111 to perform sensing by fixing two terminal parts 120 and one side of the sensing part 111 to fix the position of the sensing part 111 It includes a fixing portion 113 that makes.
상기 센싱부(111)는 도 3에서와 같이 상기 단자부(120)가 삽입 장착된 후 수지로 몰딩되는 장착홈(112)과, 상기 장착홈(112)의 저면에 형성되는 바닥판부(114)와, 상기 바닥판부(114)의 상단으로 일정간격을 두고 수직 설치되어 삽입되는 2개의 단자부(120)를 각각 지지하는 2개의 지지부(115)와, 상기 지지부(115)의 하부 바닥판부(114)에 천공되어 상기 단자부(120)가 관통되도록 한 관통부(116)와, 상기 지지부(115)에 대향되게 설치되어 삽입되는 단자부(120)를 걸림 고정시켜 주는 가이드후크(117)와, 상기 센싱부(111)의 저면 사방으로 형성되어 액체의 유출입이 가능하도록 한 개방부(118)와, 상기 바닥판부(114)의 중앙에 상기 2개의 단자부(120)를 사이에 두고 돌출 형성되는 차단벽부(119)를 포함한다.The sensing unit 111 includes a mounting groove 112 molded with a resin after the terminal unit 120 is inserted and mounted as shown in FIG. 3, a bottom plate portion 114 formed on the bottom of the mounting groove 112, and , Two support portions 115 supporting each of the two terminal portions 120 vertically installed and inserted at a predetermined interval to the top of the bottom plate portion 114, and the lower bottom plate portion 114 of the support portion 115 A through part 116 which is perforated to pass through the terminal part 120, a guide hook 117 that is installed opposite to the support part 115 to fix the inserted terminal part 120, and the sensing part ( An opening part 118 formed in all directions on the bottom of 111 to allow the inflow and outflow of liquid, and a blocking wall part 119 protruding from the center of the bottom plate part 114 with the two terminal parts 120 interposed therebetween Includes.
상기 지지부(115)의 일측 양단에는 지지턱(115a)이 형성되어 상기 단자부(120)의 삽입 위치를 제한할 수 있도록 하여준다. Support protrusions 115a are formed at both ends of one side of the support part 115 to limit the insertion position of the terminal part 120.
상기 가이드후크(117)의 상단에는 도 5에서와 같이 끼움돌기(117a)가 형성되어 상기 단자부(120)가 제한된 삽입 위치에서 고정될 수 있도록 하여준다. A fitting protrusion 117a is formed on the upper end of the guide hook 117 as shown in FIG. 5 to allow the terminal part 120 to be fixed at a limited insertion position.
상기 고정부(113)는 내측으로 체결공(113a)이 형성되어 도 7 및 도 8에서와 같이 배터리팩의 베이스플레이트(170)에 고정되는 고정부재(160)에 체결나사(161)를 통해 고정될 수 있도록 구성된다.The fixing part 113 is fixed through a fastening screw 161 to the fixing member 160 fixed to the base plate 170 of the battery pack as shown in FIGS. 7 and 8 by having a fastening hole 113a formed therein. It is structured to be.
또한 상기 고정부(113)의 저면에는 도 6과 같이 위치돌기(113b)가 더 형성되어 상기 고정부재(160)와의 결합 고정 시 위치를 잡아 줄 수 있도록 구성된다.In addition, a positioning protrusion 113b is further formed on the bottom surface of the fixing part 113 as shown in FIG. 6 to be configured to hold the position when the fixing member 160 is coupled and fixed.
상기 단자부(120)는 도 4에서와 같이 전선(130)의 단자와 저항소자(140)의 단자를 함께 고정 결합하는 결합편(121)과, 단자부(120)의 삽입 시 센싱부(111)의 지지부(115)의 지지턱(115a)에 걸림 고정되는 걸림돌기(122)와, 상기 걸림돌기(122)의 걸림 고정 시 가이드후크(117)의 끼움돌기(117a)가 걸림 고정되는 걸림공(123)으로 구성된다.As shown in FIG. 4, the terminal portion 120 includes a coupling piece 121 for fixing and coupling the terminal of the wire 130 and the terminal of the resistance element 140 together, and the sensing portion 111 when the terminal portion 120 is inserted. The locking protrusion 122 is fixed to the support protrusion 115a of the support 115, and the locking hole 123 through which the locking protrusion 117a of the guide hook 117 is locked when the locking protrusion 122 is locked. ).
또한 상기 단자부(120)에서 전선(130) 단자와 저항소자(140)의 단자는 결합편(121)에 압착공법으로 고정된다.In addition, in the terminal portion 120, the terminal of the wire 130 and the resistance element 140 is fixed to the coupling piece 121 by a crimping method.
여기서 상기 본체부(110)에 상기 단자부(120)가 장착 고정되는 구조를 보다 상세히 살펴보면, 도 5의 (a)(b)에서와 같이 상기 단자부(120)가 센싱부(111)의 장착홈(112)을 통해 지지부(115)를 거쳐 관통공(116)에 삽입되면, 상기 단자부(120)의 선단부는 바닥판부(114)의 하부로 노출되고 동시에 걸림돌기(122)가 지지부(115)의 지지턱(115a)에 걸리면서 일정한 위치에서 정지된다.Here, looking at the structure in which the terminal unit 120 is mounted and fixed to the main body 110 in more detail, the terminal unit 120 is a mounting groove of the sensing unit 111 as shown in Fig. 5(a) and (b). When inserted into the through hole 116 through the support portion 115 through 112, the tip of the terminal portion 120 is exposed to the lower portion of the bottom plate portion 114, and at the same time, the locking protrusion 122 is supported by the support portion 115. It is stopped at a certain position while being caught on the jaw 115a.
이때 상기 단자부(120)의 걸림공(123)이 센싱부(111) 가이드후크(117)의 끼움돌기(117a)에 자동 끼움 되면서 상기 단자부(120)는 상기 지지부(115)와 가이드후크(117) 사이에서 완전하게 고정되게 된다.At this time, while the locking hole 123 of the terminal part 120 is automatically fitted into the fitting protrusion 117a of the sensing part 111 and the guide hook 117, the terminal part 120 is the support part 115 and the guide hook 117 It is completely fixed in between.
그런 다음, 상기 장착홈(122) 내부를 에폭시 수지 등으로 몰딩하여 몰딩부(150)를 형성하여 줌으로써, 외부 이물질이 침투하지 못하게 하고 보다 견고한 고정 상태를 유지하도록 하여주게 된다.Then, the inside of the mounting groove 122 is molded with an epoxy resin or the like to form the molding part 150, thereby preventing foreign substances from penetrating and maintaining a more rigid fixed state.
한편 상기 본체부(110)에 결합된 단자부(120)는 도 5에서와 같이 센싱부(111)의 저면으로부터 일정높이(h) 상부에 위치한 상태를 유지하게 된다.Meanwhile, the terminal portion 120 coupled to the main body portion 110 maintains a state positioned above a predetermined height h from the bottom surface of the sensing portion 111 as shown in FIG. 5.
또한 상기 2개의 단자부(120)는 그 사이에 액체가 접촉되면, 즉 바닥면으로부터 일정높이(h) 이상 액체가 차오르면 상기 단자부(120)가 통전되면서 병렬 연결된 저항소자(140)에 의해 전체 저항값이 낮아지게 되어 액체의 감지를 수행하게 된다.In addition, when a liquid is in contact between the two terminal portions 120, that is, when a liquid is filled with a predetermined height (h) or more from the bottom surface, the terminal portion 120 is energized and the total resistance is caused by the resistance elements 140 connected in parallel. The value is lowered and the detection of the liquid is performed.
또한 상기 차단벽부(118)는 상기 바닥판부(114)의 중앙에 상기 2개의 단자부(120)를 사이에 두고 돌출 형성되어 있다.In addition, the blocking wall portion 118 is formed protruding in the center of the bottom plate portion 114 with the two terminal portions 120 therebetween.
상기 차단벽부(118)는 외부와의 온도차에 의해 배터리팩 내부에서 발생되는 이슬 또는 습기가 센서부(111) 내부로 침투하는 경우, 즉 수분이 센서부(111)의 바닥판부(114)로 침투하는 경우, 상기 차단벽부(118)가 표면장력 현상을 이용하여 이를 차단함으로써 2개의 단자부(120)가 통전되는 오작동을 방지하게 된다.In the case where dew or moisture generated inside the battery pack penetrates into the sensor unit 111 due to a temperature difference with the outside, that is, moisture penetrates into the bottom plate unit 114 of the sensor unit 111 In this case, the blocking wall portion 118 blocks it by using a surface tension phenomenon, thereby preventing a malfunction in which the two terminal portions 120 are energized.
이와 같이 구성된 본 발명 전기 차량용 배터리팩의 액체감지센서의 조립 과정과 작동 및 작용을 이하 설명한다.The assembly process, operation, and operation of the liquid detection sensor of the present invention electric vehicle battery pack configured as described above will be described below.
먼저, 도 4의 (a)와 같이 단자부(120)의 결합편(121)에 2개의 전선(130)의 단자를 일측으로 배치하고, 타측으로 저항소자(140)의 단자를 배치한다.First, as shown in FIG. 4A, the terminals of the two wires 130 are arranged on one side of the coupling piece 121 of the terminal unit 120, and the terminals of the resistance element 140 are arranged on the other side.
그런 다음, 상기 결합편(121)을 압착하여 도 4의 (b)와 같이 2개의 단자부(120)와, 전선(130) 및 저항소자(140)가 결합되도록 하여준다.Then, the coupling piece 121 is compressed so that the two terminal portions 120, the wire 130, and the resistance element 140 are coupled as shown in FIG. 4(b).
그런 다음, 상기 단자부(120)를 본체부(110)의 센싱부(111) 장착홈(112)으로 삽입한다.Then, the terminal portion 120 is inserted into the sensing portion 111 of the body portion 110, the mounting groove 112.
이때 상기 단자부(120)는 지지부(115)를 거쳐 관통공(116)에 삽입되어 상기 단자부(120)의 선단부는 바닥판부(114)의 하부로 노출되고 동시에 걸림돌기(122)가 지지부(115)의 지지턱(115a)에 걸리면서 일정한 위치에서 정지된다.At this time, the terminal portion 120 is inserted into the through hole 116 through the support portion 115 so that the tip portion of the terminal portion 120 is exposed to the lower portion of the bottom plate portion 114, and at the same time, the locking protrusion 122 is the support portion 115 It is stopped at a certain position while being caught on the supporting jaw 115a of.
동시에 상기 단자부(120)의 걸림공(123)이 센싱부(111) 가이드후크(117)의 끼움돌기(117a)에 자동 끼움 되면서 상기 단자부(120)는 상기 지지부(115)와 가이드후크(117) 사이에서 완전하게 고정되게 된다.At the same time, the locking hole 123 of the terminal part 120 is automatically inserted into the fitting protrusion 117a of the sensing part 111 and the guide hook 117, so that the terminal part 120 has the support part 115 and the guide hook 117 It is completely fixed in between.
이때의 결합 상태가 도 5의 측단면도(a) 및 정단면도(b)와 같이 구성되며, 상기 본체부(110)에 결합된 단자부(120)는 센싱부(111)의 저면으로부터 일정높이(h) 상부에 위치한 상태가 된다.The combined state at this time is configured as shown in the side cross-sectional view (a) and the front cross-sectional view (b) of FIG. 5, and the terminal portion 120 coupled to the body portion 110 is at a predetermined height (h) from the bottom surface of the sensing portion 111 ) It is located in the upper part.
이와 같이 센싱부(111)에 단자부(120)의 결합 고정이 완료되면, 상기 장착홈(122) 내부를 에폭시 수지로 몰딩(몰딩부(150))하여 액체감지센서의 제작을 완료한다.When the coupling and fixing of the terminal part 120 to the sensing part 111 is completed, the inside of the mounting groove 122 is molded (molding part 150) with an epoxy resin to complete the manufacture of the liquid detection sensor.
이와 같이 제작된 액체감지센서는 도 8에서와 같이 배터리팩의 베이스 플레이트(170)에 고정 설치되는 고정부재(160)에 도 7과 같이 체결나사(161)를 통해 고정 결합된다.The liquid detection sensor manufactured in this way is fixedly coupled to the fixing member 160 fixedly installed on the base plate 170 of the battery pack as shown in FIG. 8 through a fastening screw 161 as shown in FIG. 7.
이때의 상태가 도 8에서와 같이 센싱부(111)의 저면이 배터리팩의 베이스플레이트(170)와 일치하게 된다.In this state, as shown in FIG. 8, the bottom surface of the sensing unit 111 matches the base plate 170 of the battery pack.
이와 같은 상태에서 누액이 발생되어 소정의 액체가 베이스 플레이트(170) 상부로 점차 차오르게 되고 일정 높이(h)에 다다르면, 상기 누액은 상기 본체부(110)의 개방부(118)를 통해 2개의 단자부(120)의 선단부에 접촉된다.In such a state, when a liquid leak occurs and a predetermined liquid gradually rises to the upper part of the base plate 170 and reaches a certain height h, the leak is caused by the two liquid leakage through the opening part 118 of the main body part 110. It is in contact with the tip of the terminal portion 120.
이때 상기 단자부(120)가 통전되면서 액체감지센서는 액체를 감지하게 되고, 감지된 누액감지신호는 전선(130)을 통해 미 도시된 배터리관리시스템(BMS)로 전송된다.At this time, as the terminal unit 120 is energized, the liquid detection sensor detects the liquid, and the detected leakage detection signal is transmitted to a battery management system (BMS), not shown, through the electric wire 130.
또한 본 발명은 외부와의 온도차에 의해 배터리팩 내부에서 이슬 또는 습기와 같은 수분이 발생되면, 발생된 수분이 센서부(111)의 바닥판부(114)를 타고 침투하게 되는 데, 이때 발생된 수분이 차단벽부(118)에 의한 표면장력에 의해 반대편 단자부(120)로 넘어가지 않게 된다.In addition, in the present invention, when moisture such as dew or moisture is generated inside the battery pack due to a temperature difference with the outside, the generated moisture penetrates through the bottom plate portion 114 of the sensor unit 111. At this time, the generated moisture Due to the surface tension caused by the blocking wall portion 118, it does not pass to the opposite terminal portion 120.
따라서 2개의 단자부(120)가 통전되는 오작동이 방지된다.Accordingly, a malfunction in which the two terminal portions 120 are energized is prevented.
이상에서와 같이 본 발명은 다수개의 배터리셀 모듈이 장착된 배터리팩 내부의 위치하여 저면으로부터 일정 높이 이상 액체가 차오르면 이를 감지하여 배터리관리시스템(BMS) 측으로 알려줌으로써, 발생된 액체에 의해 배터리셀이 쇼트되어 발생될 수 있는 화재를 미연에 방지하는 효과를 제공한다.As described above, the present invention detects and informs the battery management system (BMS) when a liquid rises above a certain height from the bottom by being located inside a battery pack in which a plurality of battery cell modules are mounted, This provides an effect of preventing fire that may occur due to short circuit.
또한 본 발명은 외부와의 온도차에 의해서 발생되는 배터리팩 내부의 이슬 또는 습기에 의해 센서 자체가 오작동하는 문제점을 해결한다.In addition, the present invention solves the problem that the sensor itself malfunctions due to dew or moisture inside the battery pack caused by a temperature difference with the outside.

Claims (4)

  1. 2개의 단자부(120)가 고정 장착되어 센싱을 수행하는 센싱부(111)와, 상기 센싱부(111)의 일측으로 형성되어 상기 센싱부(111)의 위치를 고정하여 주는 고정부(113)로 이루어진 본체부(110); 및 Two terminal parts 120 are fixedly mounted to a sensing part 111 that performs sensing, and a fixed part 113 that is formed on one side of the sensing part 111 to fix the position of the sensing part 111 A main body portion 110 made; And
    2개의 전선(130) 단자에 저항소자(140)를 병렬 고정하고, 선단부가 상기 센싱부(111)의 저면 단부로부터 일정높이(h) 상부로 이격 설치되며 상기 센싱부(111)에 몰딩되는 단자부(120)를 포함하고, The resistance element 140 is fixed to the terminals of the two wires 130 in parallel, and the tip is spaced apart from the bottom end of the sensing unit 111 to a certain height (h) and is molded into the sensing unit 111 Including 120,
    상기 센싱부(111)는,The sensing unit 111,
    상기 단자부(120)가 삽입 장착된 후 수지로 몰딩되는 장착홈(112)과, 상기 장착홈(112)의 저면에 형성되는 바닥판부(114)와, 상기 바닥판부(114)의 상단으로 일정간격을 두고 수직 설치되어 삽입되는 2개의 단자부(120)를 각각 지지하는 2개의 지지부(115)와, 상기 지지부(115)의 하부 바닥판부(114)에 천공되어 상기 단자부(120)가 관통되도록 한 관통부(116)와, 상기 지지부(115)에 대향되게 설치되어 삽입되는 단자부(120)를 걸림 고정시켜 주는 가이드후크(117)와, 상기 센싱부(111)의 저면 사방으로 형성되어 액체의 유출입이 가능하도록 한 개방부(118)를 포함하여 된 것을 특징으로 하는 전기 차량용 배터리팩의 액체감지센서.After the terminal portion 120 is inserted and mounted, a mounting groove 112 molded with resin, a bottom plate portion 114 formed on the bottom surface of the mounting groove 112, and the top of the bottom plate portion 114 at a predetermined interval Two support portions 115 respectively supporting the two terminal portions 120 that are vertically installed and inserted, and a penetration through which the terminal portion 120 is perforated by being perforated in the lower bottom plate portion 114 of the support portion 115 The guide hook 117 is formed in all directions on the bottom surface of the part 116 and the terminal part 120 which is installed and inserted to be opposed to the support part 115, and the sensing part 111 is formed in all directions. Liquid detection sensor of a battery pack for an electric vehicle, characterized in that it comprises an opening (118) to enable.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 센싱부(111)는 바닥판부(114)의 중앙에 상기 2개의 단자부(120)를 사이에 두고 돌출 형성되는 차단벽부(119)를 더 형성하여 된 것을 특징으로 하는 전기 차량용 배터리팩의 액체감지센서.The sensing part 111 is formed by further forming a blocking wall part 119 protruding in the center of the bottom plate part 114 with the two terminal parts 120 interposed therebetween. sensor.
  3. 청구항 1에 있어서,The method according to claim 1,
    상기 센싱부(111)는 상기 지지부(115)의 일측 양단에는 지지턱(115a)이 형성되고, 상기 가이드후크(117)의 상단에는 끼움돌기(117a)가 형성된 것을 특징으로 하는 전기 차량용 배터리팩의 액체감지센서.In the sensing unit 111, a support protrusion 115a is formed at both ends of one side of the support unit 115, and a fitting protrusion 117a is formed at an upper end of the guide hook 117. Liquid detection sensor.
  4. 청구항 1에 있어서,The method according to claim 1,
    상기 단자부(120)는 전선(130)의 단자와 저항소자(140)의 단자를 함께 고정 결합하는 결합편(121)과, 단자부(120)의 삽입 시 센싱부(111)의 지지부(115)의 지지턱(115a)에 걸림 고정되는 걸림돌기(122)와, 상기 걸림돌기(122)의 걸림 고정 시 가이드후크(117)의 끼움돌기(117a)가 걸림 고정되는 걸림공(123)으로 구성된 것을 특징으로 하는 전기 차량용 배터리팩의 액체감지센서.The terminal unit 120 includes a coupling piece 121 that securely couples the terminal of the wire 130 and the terminal of the resistance element 140 together, and the support portion 115 of the sensing unit 111 when the terminal unit 120 is inserted. It is characterized in that it is composed of a locking protrusion 122 that is locked to the support protrusion 115a, and a locking hole 123 through which the fitting protrusion 117a of the guide hook 117 is locked when the locking protrusion 122 is locked. Liquid detection sensor for battery packs for electric vehicles.
PCT/KR2020/002947 2019-03-04 2020-03-02 Liquid detection sensor for battery pack for electric vehicles WO2020180066A1 (en)

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