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WO2018182387A1 - System for inspecting leak of secondary battery - Google Patents

System for inspecting leak of secondary battery Download PDF

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Publication number
WO2018182387A1
WO2018182387A1 PCT/KR2018/003872 KR2018003872W WO2018182387A1 WO 2018182387 A1 WO2018182387 A1 WO 2018182387A1 KR 2018003872 W KR2018003872 W KR 2018003872W WO 2018182387 A1 WO2018182387 A1 WO 2018182387A1
Authority
WO
WIPO (PCT)
Prior art keywords
secondary battery
unit
leak
stage
leak inspection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2018/003872
Other languages
French (fr)
Korean (ko)
Inventor
윤진국
신종훈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ets Co Ltd
Original Assignee
Ets Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ets Co Ltd filed Critical Ets Co Ltd
Publication of WO2018182387A1 publication Critical patent/WO2018182387A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
    • 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
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • 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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • 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

Definitions

  • the present invention relates to a secondary battery, and more particularly, to a leak inspection system of a secondary battery for inspecting the leak of a secondary battery sealed with a pouch.
  • a chemical cell is composed of a pair of electrodes and an electrolyte of a positive electrode and a negative electrode, and the amount of energy that can be stored varies depending on the material of the electrode and the electrolyte.
  • Secondary batteries are applied to various technical fields throughout the industry. For example, secondary batteries are used as energy sources for advanced electronic devices such as wireless mobile devices, and air pollution of existing gasoline and diesel internal combustion engines using fossil fuels. It is also attracting attention as an energy source for hybrid electric vehicles, which is being proposed as a solution for this.
  • Secondary batteries are manufactured in various ways depending on the shape of the case housing the electrode assembly, and typical shapes include cylindrical, rectangular, and pouch types.
  • the cylindrical secondary battery uses a cylindrical aluminum can
  • the rectangular secondary battery uses a rectangular aluminum can
  • the pouch type secondary battery is sealed with a pouch in which a thin aluminum laminate film made of aluminum is used as a pack. It is relatively light in weight and excellent in stability and is widely used in recent years.
  • a configuration of a pouch-type secondary battery includes a stack, which is an electrode assembly formed by interposing a separator, which is a separator between a negative electrode and a positive electrode, and an aluminum-laminated film by sealing the stack therein.
  • the pouch is formed, and one end is connected to the stack, and the other end is exposed to the outside of the pouch and is composed of a plate-shaped negative electrode tab for inducing current to the outside.
  • a secondary battery is generally completed by injecting an electrolyte into a pouch containing a battery cell composed of a negative electrode, a positive electrode and a separator interposed therebetween, and then sealing it.
  • the secondary battery thus manufactured is operated in such a way that ions are generated from the electrolyte injected between the negative electrode and the positive electrode and move between the electrodes, thereby generating electromotive force, and thereby charging and discharging.
  • the secondary battery has a sealed structure that can prevent the loss of the electrolyte solution affecting the charge and discharge capacity, and prevent the leakage of the electrolyte solution in consideration of the occurrence of internal pressure.
  • the electrolyte leaks due to poor leakage of the case in such a secondary battery, it is treated as a defective product. Therefore, leakage test is performed in the manufacturing process line, and the welding part of the cap plate welded to the case is usually X-ray or The inspection will be carried out by visual confirmation.
  • An object of the present invention is to solve the above problems, by measuring the distance to the plate surface of the secondary battery under atmospheric pressure and under vacuum and calculating the deviation, the electrolyte at the corresponding position when the calculated deviation is greater than the predetermined reference value
  • the present invention provides a leak inspection system for a secondary battery that can significantly improve the reliability of inspection for electrolyte leakage by judging that there is a leak.
  • a leak inspection system of a secondary battery 10 comprising: a loading unit 100 for sequentially loading a secondary battery 10 so that a plate surface faces upwards;
  • the leakage inspection unit 200 receives the secondary battery 10 from the loading unit 100 and measures the distance change with respect to the plate surface of the secondary battery 10 in a preset vacuum state to inspect the leakage of the secondary battery 10. )Wow;
  • the leak inspection system of the secondary battery 10 may further include a sorting unit 400 that sorts and discharges the secondary battery 10 inspected as defective in the leak inspection unit 200.
  • the leak inspection unit 200 may further include an identification display unit for displaying a mark for identification on the surface of the secondary battery 10 inspected as defective.
  • the leak inspection unit 200 includes a stage unit 220 that receives and supports the secondary battery 10 from the loading unit 100 and moves up and down;
  • An upper housing 210 installed at an upper side of the stage unit 220 to seal an inspection space S including the secondary battery 10 by an ascending operation of the stage unit 220;
  • the inspection space S which is coupled to at least one of the upper housing 210 and the stage unit 220 and sealed by the close contact between the upper housing 210 and the stage unit 220, is preset at atmospheric pressure.
  • the distance measuring unit 230 installed in the upper housing 210 and moved in parallel with the upper surface of the stage 220 to measure the distance to the plate surface of the secondary battery 10 supported by the stage 220.
  • the secondary battery 10 may include a controller for determining that there is a leak.
  • the distance measuring unit 230 may include at least one displacement sensor unit 231 installed outside the upper surface of the upper housing 210, and the displacement sensor unit 231 parallel to the upper surface of the stage unit 220. Movement guide portions 232 and 233 for guiding movement may be included.
  • At least a portion of the upper surface of the upper housing 210 may be made of a material that can transmit light.
  • the leak inspection system of the secondary battery measures the distance to the plate surface of the secondary battery under atmospheric pressure and under vacuum, calculates the deviation, and when the calculated deviation is larger than a predetermined reference value, the electrolyte leaks from the corresponding position.
  • the leak inspection system of the secondary battery according to the present invention by mounting an ultra-precision odor sensor in the exhaust pipe for converting the inspection space into a vacuum state, whether the electrolyte leaks through the strength and odor component of the substance in the inspection space and There is an advantage to measuring the degree of leakage.
  • the leak test system of the secondary battery according to the present invention whether the leak of the secondary battery in two stages through the leak test using the change in the distance of the plate surface of the secondary battery according to the pressure difference, and the leak test using the odor sensor As a result, the inspection of the electrolyte leakage of the secondary battery of the inspection can be precisely performed.
  • FIG. 1 is a perspective view showing an example of a secondary battery to be inspected in the leak inspection system of a secondary battery according to the present invention.
  • FIG. 2 is a sectional view taken along the line II-II in FIG. 1.
  • FIG. 3 is a plan view showing the arrangement of a leak inspection system of a secondary battery according to the present invention.
  • 4A and 4B are sectional views showing the leak inspection portion of the leak inspection system of FIG.
  • FIG. 5 is a plan view showing the leak inspection unit of FIGS. 4A and 4B.
  • FIG. 5 is a plan view showing the leak inspection unit of FIGS. 4A and 4B.
  • the leak inspection system of the secondary battery according to the present invention is a system for inspecting the leak of the secondary battery 10, as shown in FIGS. 3 to 5.
  • the first electrode sheet 13 and the second electrode sheet 14 are in contact with each other.
  • the pouches are alternately stacked to seal the secondary battery cell 20, in which the separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14, and the secondary battery cell 20 impregnated in the electrolyte. And (11).
  • the first electrode sheet 13 and the second electrode sheet 14 are stacked alternately with each other and separated by the separator 12 therebetween, respectively, to form a positive electrode and a negative electrode of the secondary battery 10.
  • the member may be formed of a metal sheet according to the electrode characteristics.
  • the separator 12 is a member interposed between the first electrode sheet 13 and the second electrode sheet 14, and preferably has a material having high wettability to the electrolyte and high chemical resistance.
  • the separator 12 may have various materials according to materials of the first electrode sheet 13 and the second electrode sheet 14 constituting the secondary battery 10, physical properties of the electrolyte, and the like.
  • the pouch 11 may be a member for sealing the secondary battery cell 20 impregnated with the electrolyte and may have various materials depending on the material of the first electrode sheet 13 and the second electrode sheet 14 and the properties of the electrolyte. have.
  • the pouch 11 is sealed after the electrolyte is injected by the electrolyte injection device according to the present invention in a state in which the secondary battery cell 20 is inserted and the upper side is opened and the remaining part is sealed.
  • the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other, and the first electrode sheet ( 13) and a secondary battery cell 20 in which the separator 12 is positioned between the second electrode sheet 14 and a pouch 11 for sealing the secondary battery cell 20 impregnated with the electrolyte, and includes a plate-shaped structure.
  • the leakage inspection unit 200 receives the secondary battery 10 from the loading unit 100 and measures the distance change with respect to the plate surface of the secondary battery 10 in a preset vacuum state to inspect the leakage of the secondary battery 10.
  • an unloading unit 300 for unloading the secondary battery 10 inspected as good quality in the leak inspection unit 200.
  • the loading unit 100 may be configured in a variety of configurations in which the secondary battery 10 is sequentially loaded so that the plate surface faces upward.
  • the loading unit 100 may be configured as a conveyor belt that supports and transports the secondary battery 10, but is not limited thereto.
  • the loading unit 100 may load the secondary battery 10 mounted on the tray 30.
  • the tray 30 may have various configurations in which the secondary battery 10 is seated so that the plate surface of the secondary battery 10 faces upward.
  • the tray 30, the wheel portion 31 may be installed on one side or the bottom in order to move the tray 30 by the rotation.
  • the tray 30 may be moved according to rotation to the wheel part 31 by an external force by a pusher or the like while being spaced apart from the support surface.
  • the leak inspection unit 200 receives the secondary battery 10 from the loading unit 100 and measures the distance change with respect to the plate surface of the secondary battery 10 in a preset vacuum state to leak the secondary battery 10.
  • Various configurations are possible with the configuration to check.
  • the leak inspection unit 200 may be installed at one side of the loading unit 100 to receive the secondary battery 10 loaded through the loading unit 100.
  • the leak inspection system preferably includes a plurality of leak inspection units 200 to perform leak inspection on the plurality of secondary batteries 10 at the same time.
  • the leak inspection unit 200 includes a stage unit 220 that receives and supports the secondary battery 10 from the loading unit 100 and moves up and down;
  • An upper housing 210 installed at an upper side of the stage unit 220 to seal an inspection space S including the secondary battery 10 by an ascending operation of the stage unit 220;
  • the inspection space S coupled to at least one of the upper housing 210 and the stage unit 220 and closed by close contact with the upper housing 210 and the stage unit 220 may be pressurized under a predetermined vacuum pressure at atmospheric pressure.
  • a pressure control unit for lowering A distance measuring unit 230 installed in the upper housing 210 and moving in parallel with the upper surface of the stage unit 220 to measure the distance to the plate surface of the secondary battery 10 supported by the stage unit 220;
  • the distance to the plate surface of the secondary battery 10 supported by the stage measuring unit 230 by the distance measuring unit 230 is set in advance by comparing the first measuring distance measured under atmospheric pressure with the second measuring distance measured under vacuum pressure.
  • the secondary battery 10 may include a controller that is determined to be defective due to leakage.
  • the stage unit 220 is supported by receiving the secondary battery 10 from the loading unit 100 and can be configured in various configurations to move up and down.
  • the stage unit 220 is mounted with the secondary battery 10 seated so that the plate surface of the secondary battery 10 faces upward and the loading unit 100 by the wheel part 31. It may be a plate supporting the bottom surface of the tray 30 moved from).
  • the stage unit 220 may be combined with a lifting unit (not shown) for moving the stage unit 220 in the vertical direction.
  • the lifting unit is configured to move the stage unit 220 up and down, and various configurations such as a linear moving device are possible.
  • the stage unit 220 may be configured to form a sealed inner inspection space (S) in close contact with the edge end of the upper housing 210 to be described later.
  • S sealed inner inspection space
  • the upper housing 210 is installed on the upper side of the stage 220, the configuration to seal the inspection space (S) including the secondary battery 10 by the lifting operation of the stage 220 is possible in various configurations. Do.
  • the upper housing 210 may have a rectangular parallelepiped shape in a state in which the upper housing 210 is combined with the stage 220 to form an internal space of the rectangular parallelepiped together with the stage 220.
  • the upper housing 210 may be fixedly installed above the stage unit 220.
  • the upper housing 210 may be opened at the lower side to be coupled to the stage 220 moved upward.
  • the upper housing 210 may further include an O-ring for closing the coupling area with the stage unit 220 along the lower opening.
  • the pressure control unit is coupled to at least one of the upper housing 210 and the stage unit 220 to preset the inspection space (S) sealed by the close contact of the upper housing 210 and the stage unit 220 at a predetermined pressure.
  • Various configurations are possible as the configuration for lowering the pressure under vacuum pressure.
  • the pressure control unit may be connected to at least one of the upper housing 210 and the stage unit 220, for example, an exhaust pipe 241 connected to one or more exhaust ports formed in the upper housing 210, and connected to an exhaust pipe 241. It may include a vacuum pump 245 for converting the space (S) between the atmospheric pressure and the predetermined vacuum pressure.
  • the exhaust pipe 241 has an upper housing 210 for converting the pressure of the internal space S between the atmospheric pressure and the preset vacuum pressure in a state where the stage 220 is moved upward and the inspection space S is closed. And at least one of the stage unit 220, for example, one or more exhaust ports formed in the upper housing 210.
  • the exhaust pipe 241 is coupled to at least one of the upper housing 210 and the stage unit 220 to close the inspection space (S) closed by the close contact between the upper housing 210 and the stage unit 220.
  • the pressure can be dropped from atmospheric pressure to a predetermined vacuum pressure.
  • the vacuum pump 245 is connected to the exhaust pipe 241 to convert the inspection space (S) between the atmospheric pressure and the predetermined vacuum pressure in consideration of forming a predetermined vacuum pressure can be selected appropriate vacuum pump have.
  • the exhaust pipe 241 may be provided with a vacuum valve 250 for maintaining a constant internal pressure of the inspection space (S).
  • a conversion from vacuum pressure to atmospheric pressure is required, and gas injection for injecting gas such as air and inert gas into the test space S is performed. It may further include a portion (not shown).
  • the gas injection unit may be configured to inject a gas such as air or inert gas into the inspection space S before the stage unit 220 is separated from the upper housing 210.
  • the distance measuring unit 230 is installed in the upper housing 210 and moved in parallel with the upper surface of the stage 220 to measure the distance to the plate surface of the secondary battery 10 supported by the stage 220.
  • Various configurations are possible with the configuration.
  • the distance measuring unit 230 may include at least one displacement sensor unit 231 installed outside the upper surface of the upper housing 210 and a displacement sensor unit 231 parallel to the upper surface of the stage unit 220. Movement guide parts 232 and 233 for guiding the movement, and a driving unit (not shown) for driving the movement of the displacement sensor unit 231.
  • the displacement sensor unit 231 is configured to measure the distance to the plate surface of the secondary battery 10 supported on the upper surface of the stage unit 220.
  • the displacement sensor unit 231 may be a laser displacement sensor, but is not limited thereto.
  • the displacement sensor unit 231 may move in one of the X and Y axes and measure a distance from the plurality of measurement points to the secondary battery 10.
  • the height profile of the whole plate surface of the secondary battery 10 may be obtained through the distance data measured at the plurality of measurement points.
  • the distance measuring unit 230 preferably includes a plurality of displacement sensor units 231.
  • At least a portion of the upper surface of the upper housing 210 may be composed of a glass plate 212 having a predetermined thickness.
  • the plate 212 may have a planar shape corresponding to the opening 211 formed on the upper surface of the upper housing 210, and may be installed in the opening 211.
  • the movement guide parts 232 and 233 are installed outside the upper surface of the upper housing 210, and the X-axis movement guide 232 for guiding the X-axis movement of the displacement sensor unit 231, and the upper housing 210. It may be installed on the outside of the upper surface of the) may include a Y-axis movement guide 233 for guiding the movement in the Y-axis direction of the displacement sensor unit 231.
  • the controller may measure the distance to the plate surface of the secondary battery 10 supported by the stage unit 220 by the distance measuring unit 230 and the first measurement distance measured under atmospheric pressure and the second measurement distance measured under vacuum pressure. In comparison, when there is a portion where a deviation occurs over a preset range, it may be determined that there is a leak in the secondary battery 10.
  • the controller compares the first measurement distance and the second measurement distance measured at the plurality of measurement points, calculates an area range formed by a portion where a deviation occurs over a preset range, and sets the reference area to which the corresponding area is preset If it exceeds, it can be judged as bad.
  • the leak inspection unit 200 may further include an identification display unit for displaying a mark for identification on the surface of the secondary battery 10 inspected as defective.
  • the identification display unit may be configured in various ways by displaying a mark for identification on the surface of the secondary battery determined as defective in the control unit.
  • the identification display unit may be a marking apparatus or a taping apparatus for displaying a laser mark or a taping label that can be identified with the naked eye, or the like as a defect marker, but is not limited thereto.
  • the leak inspection unit 200 may further include an odor measuring sensor that can measure the odor component and odor intensity of the air in the inspection space (S).
  • the odor measuring sensor is configured to measure the odor component and the odor intensity of the air in the test space (S) in order to check whether the secondary battery 10 has a variety of configurations.
  • the odor sensor may be installed in the flow path of the exhaust pipe 241 to measure the smell of the air in the process of evacuating the inside of the inspection space (S) by the pressure control unit.
  • the exhaust pipe 241 may further include a secondary valve (not shown) for odor measurement in the odor sensor.
  • the present invention can more accurately check whether the leak of the secondary battery 10 and the degree of leakage through the primary inspection through the distance measuring unit 230 and the secondary inspection through the odor sensor.
  • the unloading unit 300 may be configured in a variety of configurations to unload the secondary battery 10 inspected as a good product in the leak inspection unit 200.
  • the unloading unit 300 may be configured as a conveyor belt for receiving the secondary battery 10 or the tray 30 on which the secondary battery 10 is seated on the leak inspection unit 200 and discharging them to the outside. It is not limited to this.
  • the leak inspection system of the secondary battery 10 may further include a sorting unit 400 for selecting and discharging the secondary battery 10 inspected as defective in the leak inspecting unit 200.
  • the sorting unit 400 may be configured in a variety of configurations in which the secondary battery 10 determined as defective is sorted and discharged.
  • the sorting unit 400 may be configured as a conveyor belt for supporting and transporting the secondary battery 10 or the tray 30, but is not limited thereto.
  • the sorting unit 400 receives the secondary battery 10 that is determined to be defective from the leak inspection unit 200 directly or receives the secondary battery 10 that is determined to be defective from the unloading unit 300 and discharges it to the outside. can do.
  • the upper housing 210 has been described as being coupled / separated by the movement of the stage unit 220 in a fixed state, but the upper housing 210 and the stage unit 220 are moved relative to each other. Of course, all may be moved or only the upper housing 210 may be moved.

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

Abstract

The present invention relates to a secondary battery and, more particularly, to a system for inspecting a leak of a secondary battery, which inspects a leak of a secondary battery sealed with a pouch. Disclosed is a system for inspecting a leak of a secondary battery which comprises: a secondary batter cell (20) of a plate-like structure, in which a first electrode sheet (13) and a second electrode sheet (14) are stacked alternately and a separator (12) is positioned between the first electrode sheet (13) and the second electrode sheet (14); and a pouch (11) for sealing the secondary battery cell (20) impregnated in an electrolyte, the system for inspecting a leak of a secondary battery (10) comprising: a loading unit (100) for sequentially loading the secondary battery (10) so that a plate surface of the secondary battery (10) faces upward; a leak inspection unit (200) for checking a leak of the secondary battery (10) by measuring a change in a distance from a loading surface of the secondary battery (10) to the plate surface in a predetermined vacuum state after receiving the secondary battery (10) from the loading unit (100); and an unloading unit (300) for unloading a secondary battery (10) which is inspected to be in good condition by the leak inspection unit (200).

Description

이차전지의 리크검사시스템Leak Inspection System of Secondary Battery

본 발명은 이차전지에 관한 것으로서, 보다 상세하게는 파우치로 밀봉된 이차전지의 리크를 검사하는 이차전지의 리크검사시스템에 관한 것이다.The present invention relates to a secondary battery, and more particularly, to a leak inspection system of a secondary battery for inspecting the leak of a secondary battery sealed with a pouch.

일반적으로 화학전지는 양전극과 음전극의 전극 한쌍과 전해질로 구성되어 있는 전지로서, 전극과 전해질을 구성하는 물질에 따라 저장할 수 있는 에너지의 양이 달라진다. In general, a chemical cell is composed of a pair of electrodes and an electrolyte of a positive electrode and a negative electrode, and the amount of energy that can be stored varies depending on the material of the electrode and the electrolyte.

이러한 화학전지는 충전반응이 매우 느려서 1회 방전 용도로만 쓰이는 일차전지와, 반복적인 충방전을 통해 재사용이 가능한 이차전지로 구분된다.These chemical cells are classified into a primary battery used only for one-time discharge because of a very slow charging reaction, and a secondary battery that can be reused through repeated charging and discharging.

이차전지는 산업 전반에 걸쳐 다양한 기술분야에 적용되고 있으며, 일예로 와이어리스 모바일 기기와 같은 첨단 전자기기의 에너지원으로 사용되고 있을 뿐만 아니라 화석연료를 사용하는 기존의 가솔린 및 디젤 내연기관의 대기오염 등을 해결하기 위한 방안으로 제시되고 있는 하이브리드 전기자동차 등의 에너지원으로도 주목받고 있다.Secondary batteries are applied to various technical fields throughout the industry. For example, secondary batteries are used as energy sources for advanced electronic devices such as wireless mobile devices, and air pollution of existing gasoline and diesel internal combustion engines using fossil fuels. It is also attracting attention as an energy source for hybrid electric vehicles, which is being proposed as a solution for this.

이차전지는 전극 조립체를 수용하고 있는 케이스의 형상에 따라 여러 가지로 제조되고 있는데, 대표적인 형상으로 원통형, 각형, 파우치형 등이 있다.Secondary batteries are manufactured in various ways depending on the shape of the case housing the electrode assembly, and typical shapes include cylindrical, rectangular, and pouch types.

통상적으로 원통형 이차전지는 원통형 알루미늄캔을 사용하고, 각형 이차전지는 각형의 알루미늄캔을 사용하며, 파우치형 이차전지는 알루미늄 등의 소재로 된 박판의 알루미늄 라미네이트 필름을 팩 형태로 한 파우치로 밀봉한 것으로 상대적으로 경량이면서 안정성이 우수하여 근래 들어 널리 사용되고 있다.In general, the cylindrical secondary battery uses a cylindrical aluminum can, the rectangular secondary battery uses a rectangular aluminum can, and the pouch type secondary battery is sealed with a pouch in which a thin aluminum laminate film made of aluminum is used as a pack. It is relatively light in weight and excellent in stability and is widely used in recent years.

예로서, 파우치형 이차전지의 구성을 살펴보면, 음전극과 양전극 사이에 분리막인 세퍼레이터(separator)를 개재시켜 이루어진 전극조립체인 스택(stack)과, 이 스택을 내부에 밀봉 수용하는 것으로 알루미늄-라미네이트 필름으로 이루어진 파우치 그리고, 상기 스택에 일단이 연결되고 타단은 파우치의 외부로 노출되어 외부로 전류를 유도하기 위한 판상의 음양극용 전극탭으로 구성된다.For example, a configuration of a pouch-type secondary battery includes a stack, which is an electrode assembly formed by interposing a separator, which is a separator between a negative electrode and a positive electrode, and an aluminum-laminated film by sealing the stack therein. The pouch is formed, and one end is connected to the stack, and the other end is exposed to the outside of the pouch and is composed of a plate-shaped negative electrode tab for inducing current to the outside.

한편 이차전지는, 음전극, 양전극 및 그 사이에 개재되는 분리막으로 구성되는 전지셀이 수용된 파우치 내부에 전해액을 주입한 후 밀봉함으로써 완성됨이 일반적이다.On the other hand, a secondary battery is generally completed by injecting an electrolyte into a pouch containing a battery cell composed of a negative electrode, a positive electrode and a separator interposed therebetween, and then sealing it.

이렇게 제조되는 이차전지는, 음전극 및 양전극의 사이에 주입된 전해액으로부터 이온이 발생하여 전극 간에 이동하므로 기전력을 발생시키고, 그 작용에 의해 충ㆍ방전이 이루어지도록 하는 방식으로 운영된다.The secondary battery thus manufactured is operated in such a way that ions are generated from the electrolyte injected between the negative electrode and the positive electrode and move between the electrodes, thereby generating electromotive force, and thereby charging and discharging.

따라서, 이차전지는 충ㆍ방전 용량에 영향을 미치는 전해액의 손실을 방지하고, 또 내압 발생을 고려하여 전해액의 누출을 방지할 수 있는 밀폐형의 구조를 갖는다.Therefore, the secondary battery has a sealed structure that can prevent the loss of the electrolyte solution affecting the charge and discharge capacity, and prevent the leakage of the electrolyte solution in consideration of the occurrence of internal pressure.

이러한 이차전지에서 케이스의 기밀 불량에 의해 전해액이 누출되는 경우에는 제품의 불량으로 처리되기 때문에 제조공정 라인에서 누액 검사를 수행하게 되며, 보통 케이스에 용접되어 있는 캡 플레이트의 용접부위를 X-ray 혹은 육안으로 확인하는 방법으로 검사를 실시하게 된다.If the electrolyte leaks due to poor leakage of the case in such a secondary battery, it is treated as a defective product. Therefore, leakage test is performed in the manufacturing process line, and the welding part of the cap plate welded to the case is usually X-ray or The inspection will be carried out by visual confirmation.

그러나, X-ray 검사의 경우 공정 및 설비가 복잡하여 실현성이 떨어지고, 육안 검사는 신뢰성이 낮은 문제점이 있다.However, in the case of X-ray inspection, the process and the facilities are complicated and the practicality is low, and the visual inspection has a problem of low reliability.

본 발명의 목적은 상기와 같은 문제점을 해결하기 위하여, 대기압 하 및 진공 상태 하에서 2차 전지의 판면에 대한 거리를 측정하고 그 편차를 계산하여 계산된 편차가 미리 설정된 기준값보다 큰 경우 해당위치에서 전해액의 누출이 있는 것으로 판단함으로써 전해액 누출에 대한 검사의 신뢰성을 크게 향상시킬 수 있는 이차전지의 리크검사시스템을 제공하는 데 있다.An object of the present invention is to solve the above problems, by measuring the distance to the plate surface of the secondary battery under atmospheric pressure and under vacuum and calculating the deviation, the electrolyte at the corresponding position when the calculated deviation is greater than the predetermined reference value The present invention provides a leak inspection system for a secondary battery that can significantly improve the reliability of inspection for electrolyte leakage by judging that there is a leak.

본 발명은 상기와 같은 본 발명의 목적을 달성하기 위하여 창출된 것으로서, 본 발명은, 제1전극시트(13) 및 제2전극시트(14)가 서로 번갈아가면서 적층되며 상기 제1전극시트(13) 및 제2전극시트(14) 사이에 분리막(12)이 위치되는 이차전지셀(20)과, 전해액에 함침된 이차전지셀(20)을 밀봉하는 파우치(11)를 포함하며 판형구조를 가지는 이차전지(10)의 리크검사시스템으로서, 이차전지(10)를 판면이 상측을 향하도록 순차적으로 로딩하는 로딩부(100)와; 상기 로딩부(100)로부터 이차전지(10)를 공급받아 미리 설정된 진공압 상태에서 상기 이차전지(10)의 판면에 대한 거리변화를 측정하여 이차전지(10)의 리크를 검사하는 리크검사부(200)와; 상기 리크검사부(200)에서 양품으로 검사된 이차전지(10)를 언로딩하는 언로딩부(300)를 포함하는 것을 특징으로 하는 이차전지(10)의 리크검사시스템을 개시한다.The present invention was created to achieve the object of the present invention as described above, the present invention, the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other and the first electrode sheet 13 And a pouch 11 for sealing the secondary battery cell 20 in which the separator 12 is positioned between the second electrode sheet 14 and the secondary battery cell 20 impregnated with the electrolyte, and having a plate-like structure. A leak inspection system of a secondary battery 10, comprising: a loading unit 100 for sequentially loading a secondary battery 10 so that a plate surface faces upwards; The leakage inspection unit 200 receives the secondary battery 10 from the loading unit 100 and measures the distance change with respect to the plate surface of the secondary battery 10 in a preset vacuum state to inspect the leakage of the secondary battery 10. )Wow; Disclosed is a leak inspection system of a secondary battery 10, which includes an unloading unit 300 for unloading a secondary battery 10 inspected as a good product in the leak inspection unit 200.

상기 이차전지(10)의 리크검사시스템은, 상기 리크검사부(200)에서 불량으로 검사된 이차전지(10)를 선별하여 배출하는 선별부(400)를 추가로 포함할 수 있다.The leak inspection system of the secondary battery 10 may further include a sorting unit 400 that sorts and discharges the secondary battery 10 inspected as defective in the leak inspection unit 200.

상기 리크검사부(200)는, 불량으로 검사된 이차전지(10)의 표면에 식별을 위한 표식을 표시하는 식별표시부를 추가로 포함할 수 있다.The leak inspection unit 200 may further include an identification display unit for displaying a mark for identification on the surface of the secondary battery 10 inspected as defective.

상기 리크검사부(200)는, 상기 로딩부(100)로부터 이차전지(10)를 공급받아 지지하며 상하로 이동가능한 스테이지부(220)와; 상기 스테이지부(220)의 상측에 설치되어 상기 스테이지부(220)의 상승동작에 의하여 상기 이차전지(10)를 포함하는 검사공간(S)을 밀폐되는 상부하우징(210)과; 상기 상부하우징(210) 및 상기 스테이지부(220) 중 적어도 어느 하나에 결합되어 상기 상부하우징(210) 및 상기 스테이지부(220)의 밀착에 의하여 밀폐된 상기 검사공간(S)을 대기압에서 미리 설정된 진공압 하로 압력을 강하시키는 압력제어부와; 상기 상부하우징(210)에 설치되어 상기 스테이지부(220)의 상면과 평행하게 이동되어 상기 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 측정하는 거리측정부(230)와; 상기 거리측정부(230)에 의하여 상기 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 대기압 하에서 측정된 제1측정거리와 진공압 하에서 측정된 제2측정거리를 비교하여 미리 설정된 범위 이상으로 편차가 발생된 부분이 존재하는 경우 이차전지(10)에 리크가 있어 불량으로 판단하는 제어부를 포함할 수 있다.The leak inspection unit 200 includes a stage unit 220 that receives and supports the secondary battery 10 from the loading unit 100 and moves up and down; An upper housing 210 installed at an upper side of the stage unit 220 to seal an inspection space S including the secondary battery 10 by an ascending operation of the stage unit 220; The inspection space S, which is coupled to at least one of the upper housing 210 and the stage unit 220 and sealed by the close contact between the upper housing 210 and the stage unit 220, is preset at atmospheric pressure. A pressure control unit for dropping pressure under vacuum pressure; The distance measuring unit 230 installed in the upper housing 210 and moved in parallel with the upper surface of the stage 220 to measure the distance to the plate surface of the secondary battery 10 supported by the stage 220. Wow; By comparing the distance to the plate surface of the secondary battery 10 supported by the stage unit 220 by the distance measuring unit 230, the first measurement distance measured under atmospheric pressure and the second measurement distance measured under vacuum pressure If there is a portion in which a deviation occurs over a preset range, the secondary battery 10 may include a controller for determining that there is a leak.

상기 거리측정부(230)는, 상기 상부하우징(210)의 상면외측에 설치되는 하나 이상의 변위센서부(231)와, 상기 스테이지부(220)의 상면과 평행한 상기 변위센서부(231)의 이동을 가이드하는 이동가이드부(232, 233)를 포할 수 있다.The distance measuring unit 230 may include at least one displacement sensor unit 231 installed outside the upper surface of the upper housing 210, and the displacement sensor unit 231 parallel to the upper surface of the stage unit 220. Movement guide portions 232 and 233 for guiding movement may be included.

상기 상부하우징(210)의 상면의 적어도 일부는 광이 투과 가능한 재질로 이루어질 수 있다.At least a portion of the upper surface of the upper housing 210 may be made of a material that can transmit light.

본 발명에 따른 이차전지의 리크검사시스템은, 대기압 하 및 진공 상태 하에서 2차 전지의 판면에 대한 거리를 측정하고 그 편차를 계산하여 계산된 편차가 미리 설정된 기준값보다 큰 경우 해당위치에서 전해액의 누출이 있는 것으로 판단함으로써 전해액 누출에 대한 검사의 신뢰성을 크게 향상시킬 수 있는 이점이 있다.The leak inspection system of the secondary battery according to the present invention measures the distance to the plate surface of the secondary battery under atmospheric pressure and under vacuum, calculates the deviation, and when the calculated deviation is larger than a predetermined reference value, the electrolyte leaks from the corresponding position. By judging that there is an advantage that can greatly improve the reliability of the inspection for electrolyte leakage.

또한 본 발명에 따른 이차전지의 리크검사시스템은, 검사공간을 진공 상태로 변환하기 위한 배기관에 초정밀 냄새 감지 센서를 장착하여 검사공간에 있는 물질의 냄새의 강도 및 냄새 성분을 통해 전해액의 누출여부 및 누출정도를 측정할 수 있는 이점이 있다.In addition, the leak inspection system of the secondary battery according to the present invention, by mounting an ultra-precision odor sensor in the exhaust pipe for converting the inspection space into a vacuum state, whether the electrolyte leaks through the strength and odor component of the substance in the inspection space and There is an advantage to measuring the degree of leakage.

즉, 본 발명에 따른 이차전지의 리크검사시스템은, 압력차에 따른 이차전지의 판면의 거리변화를 이용하는 리크검사와, 냄새 감지 센서를 이용하는 리크검사를 통해 2단계에 걸쳐 이차전지의 리크여부를 검사하므로 검사의 이차전지의 전해액 누출에 대한 검사를 정밀하게 수행할 수 있다.That is, the leak test system of the secondary battery according to the present invention, whether the leak of the secondary battery in two stages through the leak test using the change in the distance of the plate surface of the secondary battery according to the pressure difference, and the leak test using the odor sensor As a result, the inspection of the electrolyte leakage of the secondary battery of the inspection can be precisely performed.

도 1은, 본 발명에 따른 이차전지의 리크검사시스템의 검사대상인 이차전지의 일예를 보여주는 사시도이다.1 is a perspective view showing an example of a secondary battery to be inspected in the leak inspection system of a secondary battery according to the present invention.

도 2는, 도 1에서 Ⅱ-Ⅱ방향의 단면도이다.FIG. 2 is a sectional view taken along the line II-II in FIG. 1.

도 3은, 본 발명에 따른 이차전지의 리크검사시스템의 배치를 보여주는 평면도이다.3 is a plan view showing the arrangement of a leak inspection system of a secondary battery according to the present invention.

도 4a 및 도4b는, 도 3의 리크검사시스템 중 리크검사부를 보여주는 단면도이다.4A and 4B are sectional views showing the leak inspection portion of the leak inspection system of FIG.

도 5는, 도 4a 및 도 4b의 리크검사부를 보여주는 평면도이다.FIG. 5 is a plan view showing the leak inspection unit of FIGS. 4A and 4B. FIG.

이하 본 발명에 따른 이차전지의 리크검사시스템에 관하여 첨부된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, a leak inspection system of a secondary battery according to the present invention will be described with reference to the accompanying drawings.

본 발명에 따른 이차전지의 리크검사시스템은, 도 3 내지 도 5에 도시된 바와 같이, 이차전지(10)의 리크를 검사하는 시스템이다.The leak inspection system of the secondary battery according to the present invention is a system for inspecting the leak of the secondary battery 10, as shown in FIGS. 3 to 5.

여기서 본 발명에 따른 이차전지의 리크검사시스템에 의하여 검사되는 이차전지(10)는, 도 1 및 도 2에 도시된 바와 같이, 제1전극시트(13) 및 제2전극시트(14)가 서로 번갈아가면서 적층되며 제1전극시트(13) 및 제2전극시트(14) 사이에 분리막(12)이 위치되는 이차전지셀(20)과, 전해질에 함침된 이차전지셀(20)을 밀봉하는 파우치(11)를 포함한다.Here, in the secondary battery 10 inspected by the leak inspection system of the secondary battery according to the present invention, as shown in FIGS. 1 and 2, the first electrode sheet 13 and the second electrode sheet 14 are in contact with each other. The pouches are alternately stacked to seal the secondary battery cell 20, in which the separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14, and the secondary battery cell 20 impregnated in the electrolyte. And (11).

상기 제1전극시트(13) 및 제2전극시트(14)는, 서로 번갈아가면서 적층되며 그 사이에 분리막(12)에 의하여 분리되는 전극들로서, 각각 이차전지(10)의 양극 및 음극을 형성하는 부재로서 전극 특성에 따라서 금속시트로 형성될 수 있다.The first electrode sheet 13 and the second electrode sheet 14 are stacked alternately with each other and separated by the separator 12 therebetween, respectively, to form a positive electrode and a negative electrode of the secondary battery 10. The member may be formed of a metal sheet according to the electrode characteristics.

상기 분리막(12)은, 제1전극시트(13) 및 제2전극시트(14) 사이에 개재되는 부재로서, 전해질에 대한 높은 젖음성과 높은 내화학성을 가지는 재질을 가짐이 바람직하다.The separator 12 is a member interposed between the first electrode sheet 13 and the second electrode sheet 14, and preferably has a material having high wettability to the electrolyte and high chemical resistance.

상기 분리막(12)은, 이차전지(10)를 구성하는 제1전극시트(13) 및 제2전극시트(14)의 재질, 전해질의 물성 등에 따라서 다양한 재질을 가질 수 있다.The separator 12 may have various materials according to materials of the first electrode sheet 13 and the second electrode sheet 14 constituting the secondary battery 10, physical properties of the electrolyte, and the like.

상기 파우치(11)는, 전해질에 함침된 이차전지셀(20)을 밀봉하는 부재로서 제1전극시트(13) 및 제2전극시트(14)의 재질, 전해질의 물성 등에 따라서 다양한 재질을 가질 수 있다.The pouch 11 may be a member for sealing the secondary battery cell 20 impregnated with the electrolyte and may have various materials depending on the material of the first electrode sheet 13 and the second electrode sheet 14 and the properties of the electrolyte. have.

한편 상기 파우치(11)는, 이차전지셀(20)이 삽입되며 상측이 개방되고 나머지 부분을 밀봉된 상태에서 후술하는 본 발명에 따른 전해질 주입장치에 의하여 전해질이 주입된 후 밀봉된다.On the other hand, the pouch 11 is sealed after the electrolyte is injected by the electrolyte injection device according to the present invention in a state in which the secondary battery cell 20 is inserted and the upper side is opened and the remaining part is sealed.

본 발명에 따른 이차전지의 리크검사시스템은, 도 3 내지 도 5에 도시된 바와 같이, 제1전극시트(13) 및 제2전극시트(14)가 서로 번갈아가면서 적층되며 상기 제1전극시트(13) 및 제2전극시트(14) 사이에 분리막(12)이 위치되는 이차전지셀(20)과, 전해액에 함침된 이차전지셀(20)을 밀봉하는 파우치(11)를 포함하며 판형구조를 가지는 이차전지(10)의 리크검사시스템으로서, 이차전지(10)를 판면이 상측을 향하도록 순차적으로 로딩하는 로딩부(100)와; 로딩부(100)로부터 이차전지(10)를 공급받아 미리 설정된 진공압 상태에서 상기 이차전지(10)의 판면에 대한 거리변화를 측정하여 이차전지(10)의 리크를 검사하는 리크검사부(200)와; 리크검사부(200)에서 양품으로 검사된 이차전지(10)를 언로딩하는 언로딩부(300)를 포함한다.In the leak test system of the secondary battery according to the present invention, as shown in FIGS. 3 to 5, the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other, and the first electrode sheet ( 13) and a secondary battery cell 20 in which the separator 12 is positioned between the second electrode sheet 14 and a pouch 11 for sealing the secondary battery cell 20 impregnated with the electrolyte, and includes a plate-shaped structure. A leak inspection system of a secondary battery 10 having a, the loading unit 100 for sequentially loading the secondary battery 10 so that the plate surface facing upward; The leakage inspection unit 200 receives the secondary battery 10 from the loading unit 100 and measures the distance change with respect to the plate surface of the secondary battery 10 in a preset vacuum state to inspect the leakage of the secondary battery 10. Wow; And an unloading unit 300 for unloading the secondary battery 10 inspected as good quality in the leak inspection unit 200.

상기 로딩부(100)는, 이차전지(10)를 판면이 상측을 향하도록 순차적으로 로딩하는 구성으로 다양한 구성이 가능하다.The loading unit 100 may be configured in a variety of configurations in which the secondary battery 10 is sequentially loaded so that the plate surface faces upward.

예로서, 상기 로딩부(100)는, 이차전지(10)를 지지하며 이송하는 컨베이어벨트로 구성될 수 있으나 이에 한정되는 것은 아니다.For example, the loading unit 100 may be configured as a conveyor belt that supports and transports the secondary battery 10, but is not limited thereto.

이때, 상기 로딩부(100)는, 트레이(30)에 안착된 상태의 이차전지(10)를 로딩할 수 있다. In this case, the loading unit 100 may load the secondary battery 10 mounted on the tray 30.

상기 트레이(30)는, 이차전지(10)의 판면이 상측을 향하도록 이차전지(10)가 안착되는 구성으로 다양한 구성이 가능하다.The tray 30 may have various configurations in which the secondary battery 10 is seated so that the plate surface of the secondary battery 10 faces upward.

상기 트레이(30)는, 회전에 의한 트레이(30)의 이동을 위하여 바퀴부(31)가 일측 또는 저면에 설치될 수 있다.The tray 30, the wheel portion 31 may be installed on one side or the bottom in order to move the tray 30 by the rotation.

상기 트레이(30)는, 지지면에서 이격된 상태로 푸셔(Pusher) 등에 의한 외력에 의한 바퀴부(31)에 회전에 따라 이동될 수 있다.The tray 30 may be moved according to rotation to the wheel part 31 by an external force by a pusher or the like while being spaced apart from the support surface.

상기 리크검사부(200)는, 로딩부(100)로부터 이차전지(10)를 공급받아 미리 설정된 진공압 상태에서 상기 이차전지(10)의 판면에 대한 거리변화를 측정하여 이차전지(10)의 리크를 검사하는 구성으로 다양한 구성이 가능하다.The leak inspection unit 200 receives the secondary battery 10 from the loading unit 100 and measures the distance change with respect to the plate surface of the secondary battery 10 in a preset vacuum state to leak the secondary battery 10. Various configurations are possible with the configuration to check.

상기 리크검사부(200)는, 도 3에 도시된 바와 같이, 로딩부(100)를 통해 로딩되는 이차전지(10)를 공급받기 위하여 로딩부(100)의 일측에 설치될 수 있다.As shown in FIG. 3, the leak inspection unit 200 may be installed at one side of the loading unit 100 to receive the secondary battery 10 loaded through the loading unit 100.

이때, 상기 리크검사시스템은, 동시에 다수의 이차전지(10)에 대한 리크검사를 수행하기 위하여 복수의 리크검사부(200)를 포함함이 바람직하다.In this case, the leak inspection system preferably includes a plurality of leak inspection units 200 to perform leak inspection on the plurality of secondary batteries 10 at the same time.

구체적으로, 상기 리크검사부(200)는, 로딩부(100)로부터 이차전지(10)를 공급받아 지지하며 상하로 이동가능한 스테이지부(220)와; 스테이지부(220)의 상측에 설치되어 스테이지부(220)의 상승동작에 의하여 이차전지(10)를 포함하는 검사공간(S)을 밀폐하는 상부하우징(210)과; 상부하우징(210) 및 스테이지부(220) 중 적어도 어느 하나에 결합되어 상부하우징(210) 및 스테이지부(220)의 밀착에 의하여 밀폐된 검사공간(S)을 대기압에서 미리 설정된 진공압 하로 압력을 강하시키는 압력제어부와; 상부하우징(210)에 설치되어 스테이지부(220)의 상면과 평행하게 이동되어 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 측정하는 거리측정부(230)와; 거리측정부(230)에 의하여 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 대기압 하에서 측정된 제1측정거리와 진공압 하에서 측정된 제2측정거리를 비교하여 미리 설정된 범위 이상으로 편차가 발생된 부분이 존재하는 경우 이차전지(10)에 리크가 있어 불량으로 판단하는 제어부를 포함할 수 있다.In detail, the leak inspection unit 200 includes a stage unit 220 that receives and supports the secondary battery 10 from the loading unit 100 and moves up and down; An upper housing 210 installed at an upper side of the stage unit 220 to seal an inspection space S including the secondary battery 10 by an ascending operation of the stage unit 220; The inspection space S coupled to at least one of the upper housing 210 and the stage unit 220 and closed by close contact with the upper housing 210 and the stage unit 220 may be pressurized under a predetermined vacuum pressure at atmospheric pressure. A pressure control unit for lowering; A distance measuring unit 230 installed in the upper housing 210 and moving in parallel with the upper surface of the stage unit 220 to measure the distance to the plate surface of the secondary battery 10 supported by the stage unit 220; The distance to the plate surface of the secondary battery 10 supported by the stage measuring unit 230 by the distance measuring unit 230 is set in advance by comparing the first measuring distance measured under atmospheric pressure with the second measuring distance measured under vacuum pressure. When there is a portion in which deviation occurs over the range, the secondary battery 10 may include a controller that is determined to be defective due to leakage.

상기 스테이지부(220)는, 로딩부(100)로부터 이차전지(10)를 공급받아 지지하며 상하로 이동가능한 구성으로 다양한 구성이 가능하다.The stage unit 220 is supported by receiving the secondary battery 10 from the loading unit 100 and can be configured in various configurations to move up and down.

예로서, 상기 스테이지부(220)는, 도 4a에 도시된 바와 같이, 이차전지(10)의 판면이 상측을 향햐도록 이차전지(10)가 안착되며 바퀴부(31)에 의해 로딩부(100)로 부터 이동된 트레이(30)의 저면을 지지하는 플레이트일 수 있다.For example, as shown in FIG. 4A, the stage unit 220 is mounted with the secondary battery 10 seated so that the plate surface of the secondary battery 10 faces upward and the loading unit 100 by the wheel part 31. It may be a plate supporting the bottom surface of the tray 30 moved from).

상기 스테이지부(220)는, 스테이지부(220)를 상하방향으로 이동시키기 위한 승강부(미도시)와 결합될 수 있다.The stage unit 220 may be combined with a lifting unit (not shown) for moving the stage unit 220 in the vertical direction.

상기 승강부는, 스테이지부(220)를 상하로 이동시키는 구성으로서 선형이동장치 등 다양한 구성이 가능하다.The lifting unit is configured to move the stage unit 220 up and down, and various configurations such as a linear moving device are possible.

상기 스테이지부(220)는, 후술하는 상부하우징(210)의 가장자리 끝단부와 밀착되어 밀폐된 내부 검사공간(S)을 형성하는 구성할 수 있다.The stage unit 220 may be configured to form a sealed inner inspection space (S) in close contact with the edge end of the upper housing 210 to be described later.

상기 상부하우징(210)은, 스테이지부(220)의 상측에 설치되어 스테이지부(220)의 상승동작에 의하여 이차전지(10)를 포함하는 검사공간(S)을 밀폐하는 구성으로 다양한 구성이 가능하다.The upper housing 210 is installed on the upper side of the stage 220, the configuration to seal the inspection space (S) including the secondary battery 10 by the lifting operation of the stage 220 is possible in various configurations. Do.

상기 상부하우징(210)은, 스테이지부(220)과 함께 직육면체의 내부공간을 형성할 수 있도록 스테이지부(220)과 결합된 상태에서 전체 형상이 직육면체 형상을 가질 수 있다.The upper housing 210 may have a rectangular parallelepiped shape in a state in which the upper housing 210 is combined with the stage 220 to form an internal space of the rectangular parallelepiped together with the stage 220.

상기 상부하우징(210)은, 스테이지부(220)의 상측에 고정설치될 수 있다.The upper housing 210 may be fixedly installed above the stage unit 220.

상기 상부하우징(210)은, 상방으로 이동된 스테이지부(220)와 결합되기 위하여 하측이 개구될 수 있다.The upper housing 210 may be opened at the lower side to be coupled to the stage 220 moved upward.

상기 상부하우징(210)은, 하측의 개구를 따라 스테이지부(220)와의 결합영역을 밀폐하기 위한 오링(O-ring)을 더 포함할 수 있다.The upper housing 210 may further include an O-ring for closing the coupling area with the stage unit 220 along the lower opening.

상기 압력제어부는, 상부하우징(210) 및 스테이지부(220) 중 적어도 어느 하나에 결합되어 상부하우징(210) 및 스테이지부(220)의 밀착에 의하여 밀폐된 검사공간(S)을 대기압에서 미리 설정된 진공압 하로 압력을 강하시키는 구성으로서 다양한 구성이 가능하다.The pressure control unit is coupled to at least one of the upper housing 210 and the stage unit 220 to preset the inspection space (S) sealed by the close contact of the upper housing 210 and the stage unit 220 at a predetermined pressure. Various configurations are possible as the configuration for lowering the pressure under vacuum pressure.

상기 압력제어부는, 상부하우징(210) 및 스테이지부(220) 중 적어도 하나, 예를 들면 상부하우징(210)에 형성된 하나 이상의 배기구에 연결되는 배기관(241)과, 배기관(241)과 연결되어 내부공간(S)을 대기압 및 미리 설정된 진공압 사이로 변환하기 위한 진공펌프(245)를 포함할 수 있다.The pressure control unit may be connected to at least one of the upper housing 210 and the stage unit 220, for example, an exhaust pipe 241 connected to one or more exhaust ports formed in the upper housing 210, and connected to an exhaust pipe 241. It may include a vacuum pump 245 for converting the space (S) between the atmospheric pressure and the predetermined vacuum pressure.

상기 배기관(241)은, 스테이지부(220)가 상측으로 이동되어 검사공간(S)이 밀폐된 상태에서 대기압 및 미리 설정된 진공압 사이에서 내부공간(S)의 압력을 변환시키기 위하여 상부하우징(210) 및 스테이지부(220) 중 적어도 하나, 예를 들면 상부하우징(210)에 형성된 하나 이상의 배기구에 연결되는 구성으로서 다양한 구성이 가능하다.The exhaust pipe 241 has an upper housing 210 for converting the pressure of the internal space S between the atmospheric pressure and the preset vacuum pressure in a state where the stage 220 is moved upward and the inspection space S is closed. And at least one of the stage unit 220, for example, one or more exhaust ports formed in the upper housing 210.

즉, 상기 배기관(241)은, 상부하우징(210) 및 스테이지부(220) 중 적어도 어느 하나에 결합되어 상부하우징(210) 및 스테이지부(220)의 밀착에 의하여 밀폐된 검사공간(S)을 대기압에서 미리 설정된 진공압 하로 압력을 강하시킬 수 있다.That is, the exhaust pipe 241 is coupled to at least one of the upper housing 210 and the stage unit 220 to close the inspection space (S) closed by the close contact between the upper housing 210 and the stage unit 220. The pressure can be dropped from atmospheric pressure to a predetermined vacuum pressure.

상기 진공펌프(245)는, 배기관(241)과 연결되어 검사공간(S)을 대기압 및 미리 설정된 진공압 사이로 변환하기 위한 구성으로서 미리 설정된 진공압을 형성하는 것을 고려하여 적절한 진공펌프가 선택될 수 있다.The vacuum pump 245 is connected to the exhaust pipe 241 to convert the inspection space (S) between the atmospheric pressure and the predetermined vacuum pressure in consideration of forming a predetermined vacuum pressure can be selected appropriate vacuum pump have.

그리고 상기 배기관(241)에는 검사공간(S)의 내부압을 일정하게 유지하기 위한 진공밸브(250)가 설치될 수 있다.In addition, the exhaust pipe 241 may be provided with a vacuum valve 250 for maintaining a constant internal pressure of the inspection space (S).

한편 리크검사 후 상부하우징(210) 및 스테이지부(220)를 분리하기 위해서는 진공압에서 다시 대기압으로의 변환이 필요한 바, 공기, 비활성기체 등의 가스를 검사공간(S)에 주입하기 위한 가스주입부(미도시)를 추가로 포함할 수 있다.Meanwhile, in order to separate the upper housing 210 and the stage 220 after the leak test, a conversion from vacuum pressure to atmospheric pressure is required, and gas injection for injecting gas such as air and inert gas into the test space S is performed. It may further include a portion (not shown).

상기 가스주입부는, 상부하우징(210)으로부터 스테이지부(220)의 분리 전에 공기, 비활성기체 등의 가스를 검사공간(S)에 주입하기 위한 구성으로서 다양한 구성이 가능하다.The gas injection unit may be configured to inject a gas such as air or inert gas into the inspection space S before the stage unit 220 is separated from the upper housing 210.

상기 거리측정부(230)는, 상부하우징(210)에 설치되어 스테이지부(220)의 상면과 평행하게 이동되어 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 측정하는 구성으로 다양한 구성이 가능하다.The distance measuring unit 230 is installed in the upper housing 210 and moved in parallel with the upper surface of the stage 220 to measure the distance to the plate surface of the secondary battery 10 supported by the stage 220. Various configurations are possible with the configuration.

예로서, 상기 거리측정부(230)는, 상부하우징(210)의 상면외측에 설치되는 하나 이상의 변위센서부(231)와, 스테이지부(220)의 상면과 평행한 변위센서부(231)의 이동을 가이드하는 이동가이드부(232, 233)와, 변위센서부(231)의 이동을 구동하는 구동부(미도시)를 포함할 수 있다.For example, the distance measuring unit 230 may include at least one displacement sensor unit 231 installed outside the upper surface of the upper housing 210 and a displacement sensor unit 231 parallel to the upper surface of the stage unit 220. Movement guide parts 232 and 233 for guiding the movement, and a driving unit (not shown) for driving the movement of the displacement sensor unit 231.

상기 변위센서부(231)는, 스테이지부(220) 상면에 지지된 이차전지(10)의 판면까지의 거리를 측정하는 구성으로, 예로서, 레이저변위센서일 수 있으나 이에 한정되는 것은 아니다.The displacement sensor unit 231 is configured to measure the distance to the plate surface of the secondary battery 10 supported on the upper surface of the stage unit 220. For example, the displacement sensor unit 231 may be a laser displacement sensor, but is not limited thereto.

상기 변위센서부(231)는, X축 및 Y축 중 어느 하나의 방향으로 이동하며 복수의 측정지점들에서 이차전지(10)까지의 거리를 측정할 수 있다.The displacement sensor unit 231 may move in one of the X and Y axes and measure a distance from the plurality of measurement points to the secondary battery 10.

복수의 측정지점들에서 측정된 거리데이터들을 통해 이차전지(10)의 판면 전체에 대한 높이프로파일이 얻어질 수 있다.The height profile of the whole plate surface of the secondary battery 10 may be obtained through the distance data measured at the plurality of measurement points.

상기 거리측정부(230)는, 복수의 변위센서부(231)들을 포함함이 바람직하다.The distance measuring unit 230 preferably includes a plurality of displacement sensor units 231.

이때, 상기 변위센서부(231)가 상부하우징(210)의 상면외측에 설치되므로, 상부하우징(210)의 상면의 적어도 일부는 광이 투과 가능한 재질로 이루어짐이 바람직하다.At this time, since the displacement sensor unit 231 is installed outside the upper surface of the upper housing 210, at least a portion of the upper surface of the upper housing 210 is preferably made of a material that can transmit light.

예로서, 상기 상부하우징(210)의 상면의 적어도 일부는 일정한 두께를 가지는 유리재질의 플레이트(212)로 구성될 수 있다.For example, at least a portion of the upper surface of the upper housing 210 may be composed of a glass plate 212 having a predetermined thickness.

구체적으로, 상기 플레이트(212)은, 상부하우징(210)의 상면에 형성된 개구(211)와 대응되는 평면형상으로 이루어져 개구(211)에 설치될 수 있다.In detail, the plate 212 may have a planar shape corresponding to the opening 211 formed on the upper surface of the upper housing 210, and may be installed in the opening 211.

상기 이동가이드부(232, 233)는, 상부하우징(210)의 상면외측에 설치되어 변위센서부(231)의 X축 방향이동을 가이드하기 위한 X축이동가이드(232)와, 상부하우징(210)의 상면외측에 설치되어 변위센서부(231)의 Y축 방향이동을 가이드하기 위한 Y축이동가이드(233)를 포함할 수 있다.The movement guide parts 232 and 233 are installed outside the upper surface of the upper housing 210, and the X-axis movement guide 232 for guiding the X-axis movement of the displacement sensor unit 231, and the upper housing 210. It may be installed on the outside of the upper surface of the) may include a Y-axis movement guide 233 for guiding the movement in the Y-axis direction of the displacement sensor unit 231.

상기 제어부는, 거리측정부(230)에 의하여 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 대기압 하에서 측정된 제1측정거리와 진공압 하에서 측정된 제2측정거리를 비교하여 미리 설정된 범위 이상으로 편차가 발생된 부분이 존재하는 경우 이차전지(10)에 리크가 있는 불량으로 판단할 수 있다.The controller may measure the distance to the plate surface of the secondary battery 10 supported by the stage unit 220 by the distance measuring unit 230 and the first measurement distance measured under atmospheric pressure and the second measurement distance measured under vacuum pressure. In comparison, when there is a portion where a deviation occurs over a preset range, it may be determined that there is a leak in the secondary battery 10.

이때, 상기 제어부는, 복수의 측정지점들에서 측정된 제1측정거리와 제2측정거리를 비교하여 미리 설정된 범위 이상으로 편차가 발생된 부분이 이루는 면적범위를 계산하여 해당 면적이 미리 설정된 기준면적을 초과하는 경우 불량으로 판단할 수 있다.In this case, the controller compares the first measurement distance and the second measurement distance measured at the plurality of measurement points, calculates an area range formed by a portion where a deviation occurs over a preset range, and sets the reference area to which the corresponding area is preset If it exceeds, it can be judged as bad.

한편, 상기 리크검사부(200)는, 불량으로 검사된 이차전지(10)의 표면에 식별을 위한 표식을 표시하는 식별표시부를 추가로 포함할 수 있다.On the other hand, the leak inspection unit 200 may further include an identification display unit for displaying a mark for identification on the surface of the secondary battery 10 inspected as defective.

상기 식별표시부는, 제어부에서 불량으로 판정된 이차전지의 표면에 식별을 위한 표식을 표시하는 구성으로 다양한 구성이 가능하다.The identification display unit may be configured in various ways by displaying a mark for identification on the surface of the secondary battery determined as defective in the control unit.

예로서, 상기 식별표시부는, 육안 등으로 식별가능한 레이저마크 또는 테이핑라벨을 불량표식으로서 표시하기 위한 마킹장치 또는 테이핑장치일 수 있으나 이에 한정되는 것은 아니다.For example, the identification display unit may be a marking apparatus or a taping apparatus for displaying a laser mark or a taping label that can be identified with the naked eye, or the like as a defect marker, but is not limited thereto.

또한, 상기 리크검사부(200)는, 검사공간(S) 내부의 공기의 냄새성분 및 냄새강도를 측정할 수 있는 냄새측정센서를 더 포함할 수 있다.In addition, the leak inspection unit 200 may further include an odor measuring sensor that can measure the odor component and odor intensity of the air in the inspection space (S).

상기 냄새측정센서는, 이차전지(10)의 리크여부를 검사하기 위하여 검사공간(S) 내부의 공기의 냄새성분 및 냄새강도를 측정하는 구성으로 다양한 구성이 가능하다.The odor measuring sensor is configured to measure the odor component and the odor intensity of the air in the test space (S) in order to check whether the secondary battery 10 has a variety of configurations.

상기 냄새측정센서는, 압력제어부에 의하여 검사공간(S) 내부에서 배기되는 과정에서 공기의 냄새를 측정하기 위하여 배기관(241)의 유로에 설치될 수 있다.The odor sensor may be installed in the flow path of the exhaust pipe 241 to measure the smell of the air in the process of evacuating the inside of the inspection space (S) by the pressure control unit.

상기 배기관(241)에는 진공밸브(250) 이외에 냄새측정센서에서의 냄새측정을 위한 2차밸브(미도시)가 더 설치될 수 있다.In addition to the vacuum valve 250, the exhaust pipe 241 may further include a secondary valve (not shown) for odor measurement in the odor sensor.

본 발명은 거리측정부(230)를 통한 1차검사와 냄새측정센서를 통한 2차검사를 통해 이차전지(10)의 리크여부 및 리크정도를 보다 정밀하게 검사할 수 있다.The present invention can more accurately check whether the leak of the secondary battery 10 and the degree of leakage through the primary inspection through the distance measuring unit 230 and the secondary inspection through the odor sensor.

상기 언로딩부(300)는, 리크검사부(200)에서 양품으로 검사된 이차전지(10)를 언로딩하는 구성으로 다양한 구성이 가능하다.The unloading unit 300 may be configured in a variety of configurations to unload the secondary battery 10 inspected as a good product in the leak inspection unit 200.

상기 언로딩부(300)는, 리크검사부(200)에서 검사가 완료된 이차전지(10) 또는 이차전지(10)가 안착된 트레이(30)를 공급받아 외부로 배출하는 컨베이어벨트로 구성될 수 있으나, 이에 한정되는 것은 아니다.The unloading unit 300 may be configured as a conveyor belt for receiving the secondary battery 10 or the tray 30 on which the secondary battery 10 is seated on the leak inspection unit 200 and discharging them to the outside. It is not limited to this.

이때, 상기 이차전지(10)의 리크검사시스템은, 리크검사부(200)에서 불량으로 검사된 이차전지(10)를 선별하여 배출하는 선별부(400)를 추가로 포함할 수 있다.At this time, the leak inspection system of the secondary battery 10 may further include a sorting unit 400 for selecting and discharging the secondary battery 10 inspected as defective in the leak inspecting unit 200.

상기 선별부(400)는, 불량으로 판정된 이차전지(10)가 선별되어 배출되는 구성으로 다양한 구성이 가능하다.The sorting unit 400 may be configured in a variety of configurations in which the secondary battery 10 determined as defective is sorted and discharged.

예로서, 상기 선별부(400)는, 이차전지(10) 또는 트레이(30)를 지지하여 이송하는 컨베이어벨트로 구성될 수 있으나 이에 한정되는 것은 아니다.For example, the sorting unit 400 may be configured as a conveyor belt for supporting and transporting the secondary battery 10 or the tray 30, but is not limited thereto.

상기 선별부(400)는, 리크검사부(200)로부터 불량으로 판정된 이차전지(10)를 바로 공급받거나 또는 언로딩부(300)에서 불량으로 판정된 이차전지(10)를 공급받아 외부로 배출할 수 있다.The sorting unit 400 receives the secondary battery 10 that is determined to be defective from the leak inspection unit 200 directly or receives the secondary battery 10 that is determined to be defective from the unloading unit 300 and discharges it to the outside. can do.

한편 본 발명의 실시예에서는, 상부하우징(210)은, 고정된 상태로 스테이지부(220)의 이동에 의하여 결합/분리되는 것으로 설명하였으나, 상대이동으로써 상부하우징(210) 및 스테이지부(220) 모두 이동되거나 상부하우징(210) 만 이동될 수도 있음은 물론이다.Meanwhile, in the exemplary embodiment of the present invention, the upper housing 210 has been described as being coupled / separated by the movement of the stage unit 220 in a fixed state, but the upper housing 210 and the stage unit 220 are moved relative to each other. Of course, all may be moved or only the upper housing 210 may be moved.

이상은 본 발명에 의해 구현될 수 있는 바람직한 실시예의 일부에 관하여 설명한 것에 불과하므로, 주지된 바와 같이 본 발명의 범위는 위의 실시예에 한정되어 해석되어서는 안 될 것이며, 위에서 설명된 본 발명의 기술적 사상과 그 근본을 함께하는 기술적 사상은 모두 본 발명의 범위에 포함된다고 할 것이다.Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

Claims (5)

제1전극시트(13) 및 제2전극시트(14)가 서로 번갈아가면서 적층되며 상기 제1전극시트(13) 및 제2전극시트(14) 사이에 분리막(12)이 위치되는 이차전지셀(20)과, 전해액에 함침된 이차전지셀(20)을 밀봉하는 파우치(11)를 포함하며 판형구조를 가지는 이차전지(10)의 리크검사시스템으로서,The secondary battery cell in which the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other and the separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14 ( 20) and a pouch 11 for sealing a secondary battery cell 20 impregnated with an electrolyte and having a plate-like structure, the leak inspection system of the secondary battery 10, 이차전지(10)를 판면이 상측을 향하도록 순차적으로 로딩하는 로딩부(100)와;A loading unit 100 for sequentially loading the secondary battery 10 so that the plate surface faces upward; 상기 로딩부(100)로부터 이차전지(10)를 공급받아 미리 설정된 진공압 상태에서 상기 이차전지(10)의 판면에 대한 거리변화를 측정하여 이차전지(10)의 리크를 검사하는 리크검사부(200)와;The leakage inspection unit 200 receives the secondary battery 10 from the loading unit 100 and measures the distance change with respect to the plate surface of the secondary battery 10 in a preset vacuum state to inspect the leakage of the secondary battery 10. )Wow; 상기 리크검사부(200)에서 양품으로 검사된 이차전지(10)를 언로딩하는 언로딩부(300)를 포함하는 것을 특징으로 하는 이차전지(10)의 리크검사시스템.Leak inspection system of the secondary battery (10), characterized in that it comprises an unloading unit (300) for unloading the secondary battery (10) inspected as good in the leak inspection unit (200). 청구항 1에 있어서,The method according to claim 1, 상기 이차전지(10)의 리크검사시스템은,The leak inspection system of the secondary battery 10, 상기 리크검사부(200)에서 불량으로 검사된 이차전지(10)를 선별하여 배출하는 선별부(400)를 추가로 포함하는 것을 특징으로 하는 이차전지(10)의 리크검사시스템.Leak inspection system of the secondary battery 10, characterized in that it further comprises a sorting unit 400 for selecting and discharging the secondary battery 10 inspected as defective in the leak inspection unit (200). 청구항 1에 있어서The method according to claim 1 상기 리크검사부(200)는, 불량으로 검사된 이차전지(10)의 표면에 식별을 위한 표식을 표시하는 식별표시부를 추가로 포함하는 것을 특징으로 하는 이차전지(10)의 리크검사시스템.The leak inspection unit 200, the leakage inspection system of the secondary battery 10, characterized in that it further comprises an identification display for displaying a mark for identification on the surface of the secondary battery (10) inspected as defective. 청구항 1에 있어서,The method according to claim 1, 상기 리크검사부(200)는, The leak inspection unit 200, 상기 로딩부(100)로부터 이차전지(10)를 공급받아 지지하며 상하로 이동가능한 스테이지부(220)와;A stage unit 220 which receives and supports the secondary battery 10 from the loading unit 100 and moves up and down; 상기 스테이지부(220)의 상측에 설치되어 상기 스테이지부(220)의 상승동작에 의하여 상기 이차전지(10)를 포함하는 검사공간(S)을 밀폐하는 상부하우징(210)과;An upper housing 210 installed at an upper side of the stage 220 to seal an inspection space S including the secondary battery 10 by an upward movement of the stage 220; 상기 상부하우징(210) 및 상기 스테이지부(220) 중 적어도 어느 하나에 결합되어 상기 상부하우징(210) 및 상기 스테이지부(220)의 밀착에 의하여 밀폐된 상기 검사공간(S)을 대기압에서 미리 설정된 진공압 하로 압력을 강하시키는 압력제어부와;The inspection space S, which is coupled to at least one of the upper housing 210 and the stage unit 220 and sealed by the close contact between the upper housing 210 and the stage unit 220, is preset at atmospheric pressure. A pressure control unit for dropping pressure under vacuum pressure; 상기 상부하우징(210)에 설치되어 상기 스테이지부(220)의 상면과 평행하게 이동되어 상기 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 측정하는 거리측정부(230)와;The distance measuring unit 230 installed in the upper housing 210 and moved in parallel with the upper surface of the stage 220 to measure the distance to the plate surface of the secondary battery 10 supported by the stage 220. Wow; 상기 거리측정부(230)에 의하여 상기 스테이지부(220)에 지지된 이차전지(10)의 판면에 대한 거리를 대기압 하에서 측정된 제1측정거리와 진공압 하에서 측정된 제2측정거리를 비교하여 미리 설정된 범위 이상으로 편차가 발생된 부분이 존재하는 경우 이차전지(10)에 리크가 있어 불량으로 판단하는 제어부를 포함하는 것을 특징으로 하는 이차전지(10)의 리크검사시스템.By comparing the distance to the plate surface of the secondary battery 10 supported by the stage unit 220 by the distance measuring unit 230, the first measurement distance measured under atmospheric pressure and the second measurement distance measured under vacuum pressure Leak inspection system of a secondary battery (10), characterized in that it comprises a control unit for determining that there is a leak in the secondary battery (10) when there is a portion in which deviation occurs over a predetermined range. 청구항 4에 있어서,The method according to claim 4, 상기 거리측정부(230)는,The distance measuring unit 230, 상기 상부하우징(210)의 상면외측에 설치되는 하나 이상의 변위센서부(231)와, At least one displacement sensor unit 231 installed outside the upper surface of the upper housing 210; 상기 스테이지부(220)의 상면과 평행한 상기 변위센서부(231)의 이동을 가이드하는 이동가이드부(232, 233)를 포함하며,It includes a movement guide part (232, 233) for guiding the movement of the displacement sensor unit 231 parallel to the upper surface of the stage 220, 상기 상부하우징(210)의 상면의 적어도 일부는 광이 투과 가능한 재질로 이루어지는 것을 특징으로 하는 리크검사시스템. Leak inspection system, characterized in that at least a portion of the upper surface of the upper housing 210 made of a material that can transmit light.
PCT/KR2018/003872 2017-03-31 2018-04-02 System for inspecting leak of secondary battery Ceased WO2018182387A1 (en)

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