KR20010011231A - Test device for leaking used in secondary battery and method for making secondary battery utilizing the same - Google Patents

Test device for leaking used in secondary battery and method for making secondary battery utilizing the same Download PDF

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Publication number
KR20010011231A
KR20010011231A KR1019990030502A KR19990030502A KR20010011231A KR 20010011231 A KR20010011231 A KR 20010011231A KR 1019990030502 A KR1019990030502 A KR 1019990030502A KR 19990030502 A KR19990030502 A KR 19990030502A KR 20010011231 A KR20010011231 A KR 20010011231A
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South Korea
Prior art keywords
case
secondary battery
electrolyte
gas
injection hole
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KR1019990030502A
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Korean (ko)
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KR100537603B1 (en
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남상권
전광열
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김순택
삼성에스디아이 주식회사
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Priority to KR10-1999-0030502A priority Critical patent/KR100537603B1/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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285—Testing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • 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
    • H01M10/4228—Leak testing of cells or batteries
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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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)
  • Secondary Cells (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE: A leak inspecting apparatus and a manufacturing method of a secondary battery using the same are provided to inspect a sealing state of a welded case before injecting an electrolyte thereinto. CONSTITUTION: A vacuum nozzle(12) is mounted to an injection hole(8a) for an electrolyte which is formed at a case having an electrode portion therein. A vacuum pump(16) is mounted to a pipe which is connected to the vacuum nozzle(12). A He gas sensor(20) and a control valve(18) are mounted to the pipe. A hood(22) is provided to surround the case and the vacuum nozzle(12). A He gas supply means(26) injects He gas into the hood(22). By the He gas sensor(20), the leakage of He gas is sensed while exhausting an air in the case through the electrolyte injection hole(8a). The electrolyte injection hole(8a) is sealed after injecting the electrolyte in the case therethrough.

Description

이차전지의 리크 검사장치 및 그를 이용한 이차전지의 제조방법{Test device for leaking used in secondary battery and method for making secondary battery utilizing the same}Leak Test Apparatus for Secondary Battery and Manufacturing Method of Secondary Battery Using Same {Test device for leaking used in secondary battery and method for making secondary battery utilizing the same}

본 발명은 케이스를 용접한 후 전해액을 주입하기 전 공정으로, 케이스의 밀봉 상태를 검사하는 이차전지의 리크 검사장치 및 그를 이용하여 이차전지를 제조하는 방법에 관한 것이다.The present invention relates to a leak inspection apparatus of a secondary battery for inspecting a sealed state of a case and a method of manufacturing a secondary battery using the same after the case is welded and before the electrolyte is injected.

이차전지는 재충전이 가능하고 소형 및 대용량화가 가능한 것으로, 대표적으로는 니켈수소(Ni-MH)전지와 리튬(Li)전지 및 리튬이온(Li-ion)전지가 사용되고 있으며, 외관상으로는 원통형과 각형 전지로 구분되고 있다.Rechargeable batteries can be recharged, miniaturized and large-capacity. Representatively, nickel-hydrogen (Ni-MH) batteries, lithium (Li) batteries, and lithium-ion (Li-ion) batteries are used. It is divided into battery.

그 중에서 각형 이차전지는 통상 정극과 세퍼레이터 및 부극을 함께 권취한 후 압착하여서 된 전극부를 캔 내부에 수납하고, 그 캔의 상부에 안전 밴트(vent)와 전해액 주입구가 형성된 캡 플레이트를 용접하며, 상기 전해액 주입구를 통해 전해액을 주입한 후 밀봉하여 제조되어진다.Among them, the rectangular secondary battery usually winds the positive electrode, the separator, and the negative electrode together, stores the compressed electrode in the can, and welds a cap plate having a safety vent and an electrolyte injection hole formed thereon. After the electrolyte is injected through the electrolyte inlet, it is manufactured by sealing.

캡 플레이트는 전극부의 정극 혹은 부극과 연결된 인출 단자를 포함하며, 상기 전극부 중에서 나머지 부극 혹은 정극은 캔과 직접 접촉하거나 탭을 통하여 연결되어진다.The cap plate includes a lead terminal connected to the positive electrode or the negative electrode of the electrode part, and the remaining negative electrode or the positive electrode of the electrode part is directly in contact with the can or connected through a tab.

이렇게 구성된 종래의 이차전지는 정극과 부극의 사이에 주입된 전해액으로부터 이온이 발생하여 전극간에 이동하므로 기전력을 발생시키고, 그 작용에 의해 충·방전이 이루어지도록 한다.In the conventional secondary battery configured as described above, since ions are generated from the electrolyte injected between the positive electrode and the negative electrode and move between the electrodes, electromotive force is generated, and charging and discharging are performed by the action thereof.

따라서 종래의 이차전지는 충·방전 용량에 영향을 미치는 전해액의 손실을 방지하기 위해, 또한 내압 발생을 고려하여 기본적으로 밀폐 형성되는바, 케이스의 실링 불량에 의해 전해액이 누출될 때에는 제품 불량으로 처리되어진다.Therefore, the conventional secondary battery is basically sealed in order to prevent loss of the electrolyte solution affecting the charge and discharge capacity, and also in consideration of occurrence of internal pressure, and when the electrolyte leaks due to a poor sealing of the case, it is treated as a product defect. It is done.

이러한 점을 고려하여 종래에는 전극부가 수납된 캔의 개구에 캡 플레이트를 용접한 후 그 용접부를 X-ray 혹은 육안 검사하게 되는데, 이때 X-ray 검사는 공정 및 설비가 복잡하여 실현성이 부족하고, 육안 검사는 신뢰성이 떨어지는 문제점이 있다.In consideration of this point, conventionally, the cap plate is welded to the opening of the can in which the electrode part is received, and then the welded part is x-rayed or visually inspected. In this case, the x-ray inspection is complicated due to a complicated process and equipment, and thus lacks practicality Visual inspection has a problem of low reliability.

앞서 설명한 종래 기술의 문제점을 해결하기 위한 것으로서, 본 발명은 케이스의 실링 상태를 용이하고 정확하게 검사할 수 있도록 한 이차전지의 리크 검사장치 및 그 장치를 이용한 이차전지의 제조방법을 제공함에 목적을 두고 있다.In order to solve the problems of the prior art described above, an object of the present invention is to provide a leak inspection apparatus of a secondary battery and a method of manufacturing a secondary battery using the device to facilitate and accurately inspect the sealing state of the case. have.

이를 위하여 본 발명에서는 전극부가 수납된 후 용접 결합된 케이스를 He 가스 분위기의 후드 내부에 배치하고, 상기 케이스의 전해액 주입구에 진공 노즐을 연결하며, 상기 노즐에서 인출된 파이프에 진공 펌프를 연결하여 케이스 내부의 공기를 배기하고, 이때 상기 파이프에 He 가스센서를 설치하여서 He 가스의 누출 여부를 측정하므로 케이스의 실링 상태를 검사하는 장치를 제안한다.To this end, in the present invention, the case in which the electrode unit is housed and welded is disposed inside the hood of the He gas atmosphere, a vacuum nozzle is connected to the electrolyte injection hole of the case, and a vacuum pump is connected to the pipe drawn from the nozzle. Since the air is exhausted and He gas sensor is installed in the pipe to measure the leakage of He gas, an apparatus for checking the sealing state of the case is proposed.

또 본 발명에서는 전극부가 수납된 캔의 개구에 캡 플레이트를 용접한 후, 상기 장치를 이용하여 케이스의 주변에 He 가스 분위기를 형성하고, 상기 케이스를 진공 배기하면서 He 가스의 누출 여부를 측정하므로 케이스의 실링 상태를 검사하며, 그 후 케이스의 전해액 주입구를 통해 전해액을 주입하고 밀봉하므로 제조할 수 있다.In the present invention, after the cap plate is welded to the opening of the can housed with the electrode portion, using the apparatus to form a He gas atmosphere around the case, while evacuating the case to measure whether or not the leak of He gas It is possible to manufacture the sealing state of the test, after which the electrolyte is injected and sealed through the electrolyte injection hole of the case.

도 1은 본 발명에 의한 이차전지의 리크 검사장치를 보인 구성도.1 is a block diagram showing a leak inspection apparatus of a secondary battery according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

2-이차전지 4-캔2-secondary battery 4-can

8-캡 플레이트 8a-전해액 주입구8-cap plate 8a-electrolyte inlet

12-진공 노즐 14-파이프12-vacuum nozzle 14-pipe

16-진공 펌프 18-조절 밸브16-vacuum pump 18-regulating valve

20-He 가스센서 22-후드20-He gas sensor 22-hood

26-He 가스 공급수단26-He gas supply

이하, 본 발명을 실현하기 위한 바람직한 실시 예를 첨부 도면에 의거하여 설명한다.Hereinafter, preferred embodiments for realizing the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명에 의한 이차전지의 리크 검사장치 전체 구성을 보여주고 있다.1 shows the overall configuration of a leak inspection apparatus of a secondary battery according to the present invention.

도면에서와 같이 본 발명은 각형 구조를 갖는 이차전지에 대하여 설명하고 있으며, 특히 정극 활물질로 리튬-천이금속산화물을 사용하고 부극 활물질로 탄소 및 탄소복합체를 사용하며, 유기용매에 리튬염을 녹인 전해액을 사용하는 리튬이차전지(2)에 대하여 설명하기로 한다.As shown in the drawings, the present invention describes a secondary battery having a rectangular structure, and in particular, a lithium-transition metal oxide is used as the positive electrode active material, carbon and a carbon composite material are used as the negative electrode active material, and an electrolyte solution in which lithium salt is dissolved in an organic solvent. It will be described with respect to the lithium secondary battery (2) using.

이차전지(2)는 캔(4)의 내부에 전극부(6)를 수납하고, 그 캔(4)의 개구에 캡 플레이트(8)를 용접하므로 외장 케이스를 구성하게 되며, 전해액을 주입하기 전의 상태를 보여주고 있다. 이렇게 형성된 이차전지(2)는 트레이, 컨베이어 혹은 작업대(10)에 배치되며, 도시하지 않은 구동수단에 의해 승, 하강될 수 있다.The secondary battery 2 houses the electrode portion 6 inside the can 4 and welds the cap plate 8 to the opening of the can 4 to form an exterior case, and before the electrolyte is injected. It is showing the status. The secondary battery 2 thus formed is disposed on the tray, the conveyor or the work table 10, and may be lifted and lowered by a driving means not shown.

이차전지(2)의 캡 플레이트(8)에는 전해액 주입구(8a)가 형성되어 있으며, 여기에는 케이스 내부 공기를 배기하기 위한 진공 노즐(12)이 연결되어 밀착 설치되어진다. 진공 노즐(12)은 자체 구동수단을 구비하여 승, 하강될 수 있다.An electrolyte injection hole 8a is formed in the cap plate 8 of the secondary battery 2, and a vacuum nozzle 12 for exhausting air inside the case is connected and installed in close contact with the cap plate 8. The vacuum nozzle 12 may be raised and lowered by having a self-driving means.

진공 노즐(12)은 파이프(14)를 통하여 진공 펌프(16)에 연결되므로, 상기 진공 펌프(16)의 작동에 의해 케이스 내부를 진공 분위기로 만든다. 이러한 진공 공정을 제어하기 위해 파이프(14)에는 조절 밸브(18)가 설치되어 있으며, 아울러 파이프 상에는 He 가스센서(20)가 설치되어 있다.Since the vacuum nozzle 12 is connected to the vacuum pump 16 through the pipe 14, the operation of the vacuum pump 16 makes the inside of the case into a vacuum atmosphere. In order to control such a vacuum process, the control valve 18 is provided in the pipe 14, and the He gas sensor 20 is provided on the pipe.

진공 노즐(12)이 연결된 이차전지(2)의 주변에는 He 가스 분위기를 만들어, 상기 진공 펌프(16)의 작동에 의해 케이스 내부를 진공 배기할 때, 상기 He 가스가 케이스 내부로 유입 및 배기되는 것을 상기 He 가스센서(20)를 통하여 측정하므로 상기 케이스의 실링 상태를 검사하는 것이다.A He gas atmosphere is created around the secondary battery 2 to which the vacuum nozzle 12 is connected, and when the vacuum is evacuated inside the case by the operation of the vacuum pump 16, the He gas flows into and out of the case. Since it is measured through the He gas sensor 20 is to check the sealing state of the case.

이를 위하여 진공 노즐(12)을 포함하는 이차전지(2)의 주변에는 후드(22)가 설치되며, 그 후드(22)에는 He 가스 노즐(24)이 설치되어진다. He 가스 노즐(24)은 He 가스 공급수단(26)으로부터 공급된 He 가스를 후드(22)의 내부로 분사하게 된다.To this end, a hood 22 is installed around the secondary battery 2 including the vacuum nozzle 12, and a He gas nozzle 24 is installed at the hood 22. The He gas nozzle 24 injects the He gas supplied from the He gas supply means 26 into the hood 22.

He 가스는 공기 보다 가벼우므로 후드(22)는 아래쪽이 개방되어 있어도 무방하다. 또 상기 후드(22)는 별도의 구동수단에 의해 승, 하강될 수 있으며, 여기에 진공 노즐(12)을 일체로 설치하므로 함께 승, 하강되게 구성할 수 있다.Since He gas is lighter than air, the hood 22 may be open at the bottom. In addition, the hood 22 may be raised and lowered by a separate driving means, and since the vacuum nozzle 12 is integrally installed here, the hood 22 may be configured to be raised and lowered together.

이와 같이 구성된 이차전지의 리크 검사장치에 의거하여, 본 발명은 캔의 내부에 전극부를 수납하고 그 캔의 내구에 캡 플레이트를 용접 결합한 후, 이렇게 용접된 케이스를 He 가스 분위기의 후드(22) 내부에 배치하고, 상기 케이스의 전해액 주입구(8a)에 진공 노즐(12)을 연결하며, 상기 노즐(12)에 연결된 진공 펌프(16)를 작동시켜 케이스 내부의 공기를 배기한다. 이때 배기 파이프(14)에 설치된 He 가스센서(20)를 통하여 He 가스의 누출 여부를 측정하여 궁극적으로 케이스의 리크 상태 즉, 캔과 캡 플레이트의 용접 상태를 검사하게 된다.Based on the leak inspection apparatus of the secondary battery configured as described above, the present invention accommodates the electrode portion inside the can and welds the cap plate to the end of the can, and then the welded case is placed inside the hood 22 of the He gas atmosphere. The vacuum nozzle 12 is connected to the electrolyte injection hole 8a of the case, and the vacuum pump 16 connected to the nozzle 12 is operated to exhaust the air inside the case. At this time, the He gas sensor 20 installed in the exhaust pipe 14 measures whether the leak of He gas ultimately examines the leak state of the case, that is, the welding state of the can and the cap plate.

케이스의 리크 검사가 완료된 이차전지는 도시하지 않은 컨베이어에 의해 다음 공정으로 이송되고, 캡 플레이트(8)의 전해액 주입구(8a)를 통해 전해액을 주입한 후, 플러그를 막아 밀봉하므로 완제품으로 제조되어진다.After the leak test of the case is completed, the secondary battery is transferred to the next process by a conveyor (not shown), and after the electrolyte is injected through the electrolyte injection hole 8a of the cap plate 8, the plug is sealed to seal the finished product. .

이상에서 설명한 구성 및 작용을 통하여 알 수 있는 바와 같이, 본 발명은 He 가스 분위기에 전해액이 주입되기 전 상태의 이차전지를 투입하고, 전해액 주입구를 통해 상기 이차전지의 내부를 진공 배기하면서 He 가스의 리크를 센싱하므로, 간단한 장치를 이용해 이차전지의 실링 상태 및 리크 검사를 용이하게 실시하는 효과를 얻을 수 있다.As can be seen through the configuration and operation described above, the present invention is a secondary battery of the state before the electrolyte is injected into the He gas atmosphere, and the exhaust of the He gas while evacuating the inside of the secondary battery through the electrolyte injection port Since the leak is sensed, it is possible to easily perform the sealing state and the leak inspection of the secondary battery using a simple device.

또한 본 발명에 의하면 이차전지의 리크 검사 시간이 단축되므로 제조 작업성과 생산성을 향상시키는 효과를 얻을 수 있다.In addition, according to the present invention, since the leak inspection time of the secondary battery is shortened, an effect of improving manufacturing workability and productivity can be obtained.

Claims (2)

전극부가 수납된 케이스의 내부로 전해액을 주입하기 전에 그 내부의 밀봉 상태를 검사함에 있어서, 상기 케이스에 형성된 전해액 주입구에 설치되는 진공 노즐과, 상기 노즐에 연결된 파이프에 설치되는 진공 펌프와, 상기 파이프 상에 설치되는 He 가스센서 및 조절 밸브와, 상기 케이스와 진공 노즐을 감싸도록 설치되는 후드와, 상기 후드의 내부로 He 가스를 주입하는 He 공급수단을 포함하는 이차전지의 리크 검사장치.In the inspection of the sealing state therein before injecting the electrolyte into the case in which the electrode part is housed, a vacuum nozzle provided in the electrolyte injection hole formed in the case, a vacuum pump provided in the pipe connected to the nozzle, and the pipe And a He gas sensor and a control valve installed on the cover, a hood installed to surround the case and the vacuum nozzle, and a He supply means for injecting He gas into the hood. 캔의 내부에 전극부를 수납하고 그 개구에 캡 플레이트를 용접하는 단계와; 이렇게 형성된 케이스를 He 가스 분위기에 투입하고, 상기 캡 플레이트에 형성된 전해액 주입구를 통해 케이스 내부의 공기를 배기하면서 He 가스의 누출여부를 측정하므로 리크 여부를 검사하는 단계와; 상기 전해액 주입구를 통해 케이스의 내부에 전해액을 주입하고 밀봉하는 단계를 포함하는 이차전지의 제조방법.Accommodating the electrode portion in the can and welding the cap plate to the opening; Injecting the case thus formed into a He gas atmosphere, and evacuating the air in the case through the electrolyte injection hole formed in the cap plate, thereby checking whether the He gas leaks, thereby checking for leakage; The method of manufacturing a secondary battery comprising the step of injecting and sealing the electrolyte into the interior of the case through the electrolyte injection hole.
KR10-1999-0030502A 1999-07-27 1999-07-27 Test device for leaking used in secondary battery and method for making secondary battery utilizing the same KR100537603B1 (en)

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