WO2022215879A1 - 전극셀 검사장치 및 검사방법 - Google Patents
전극셀 검사장치 및 검사방법 Download PDFInfo
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- WO2022215879A1 WO2022215879A1 PCT/KR2022/003471 KR2022003471W WO2022215879A1 WO 2022215879 A1 WO2022215879 A1 WO 2022215879A1 KR 2022003471 W KR2022003471 W KR 2022003471W WO 2022215879 A1 WO2022215879 A1 WO 2022215879A1
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- Prior art keywords
- electrode cell
- tabs
- temperature
- taps
- target point
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- 238000000034 method Methods 0.000 title claims description 31
- 238000009826 distribution Methods 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000007689 inspection Methods 0.000 claims description 49
- 230000002950 deficient Effects 0.000 claims description 30
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 235000014676 Phragmites communis Nutrition 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- 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
- H01M10/42—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
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/026—Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
-
- 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
- G01R31/54—Testing for continuity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to an electrode cell inspection apparatus and an inspection method, and more particularly, to an inspection apparatus and inspection method for inspecting whether a partial disconnection occurs in a tab of an electrode cell.
- lithium secondary batteries such as lithium ion batteries and lithium ion polymer batteries having advantages such as high energy density, discharge voltage, and output stability.
- the secondary battery may be classified according to the structure of the electrode cell having the anode/separator/cathode structure.
- the stack type is a structure in which a separator is interposed between electrodes cut to a predetermined size, and is sequentially stacked
- the winding type is a structure in which a separator is simultaneously wound and stacked with a separator interposed between uncut electrodes.
- a lead is bonded to a plurality of tabs connected to a plurality of electrodes. Accordingly, the plurality of electrodes may be electrically connected to the external terminal through the lead.
- the tab may be partially disconnected.
- a partial disconnection may occur in the tab during the process of forming the tab by processing the uncoated portion of the current collector, or the partial disconnection may occur in the tab during the process of bonding leads to a plurality of tabs.
- a defect such as a low voltage may be caused in the electrode cell.
- An object of the present invention is to provide an electrode cell inspection apparatus and an inspection method capable of quickly and accurately inspecting whether or not partial disconnection of a plurality of tabs occurs.
- An electrode cell inspection apparatus includes a plurality of electrodes stacked with a separator therebetween, a plurality of tabs connected to the plurality of electrodes, and an electrode cell including a lead bonded to the plurality of tabs. can be inspected
- the electrode cell inspection apparatus may include: a heater for heating the lead; and a thermal sensor sensing a temperature distribution of the plurality of tabs heated by heat conducted from the lead.
- the electrode cell inspection apparatus may further include a controller communicating with the thermal sensor.
- the controller may be configured to determine whether a temperature difference between two different points of at least one of the plurality of taps is outside a preset range, or a temperature difference between two different points of at least one of the plurality of taps and a temperature difference between two different points of another tap of the plurality of taps. When the difference in temperature is out of a preset range, the electrode cell may be determined to be defective.
- the electrode cell inspection apparatus may include an output interface for outputting a failure signal when the controller determines that the electrode cell is defective; Alternatively, when the controller determines that the electrode cell is defective, it may further include at least one of an unloader that recovers the electrode cell from the manufacturing line.
- the thermal sensor may include a first thermal sensor and a second thermal sensor that are disposed to face each other with the non-bonding portions of the plurality of tabs interposed therebetween.
- the heater may include a pair of contact bodies in contact with the lead and at least one of which is heated to a preset temperature.
- Electrode cell inspection apparatus a heater for heating the lead; And it may include a pair of thermal sensors for sensing the temperature of the target point of the plurality of tabs heated by the heat conducted from the lead.
- the electrode cell inspection apparatus may further include a controller communicating with the thermal sensor.
- the controller may be configured to determine whether a temperature of at least one of the target points of the plurality of taps is out of a preset range, or a difference between a temperature of a target point of some of the plurality of taps and a temperature of a target point of some other taps is preset. If it is out of the range, the electrode cell may be determined to be defective.
- the electrode cell inspection method comprises an electrode cell comprising a plurality of electrodes stacked with a separator interposed therebetween, a plurality of tabs connected to the plurality of electrodes, and leads bonded to the plurality of tabs. can be inspected
- the electrode cell inspection method may include a heating step of heating the lead; a sensing step of sensing a temperature distribution of the plurality of tabs heated by heat conducted from the leads; and determining whether the electrode cell is defective based on the temperature distribution of the plurality of taps.
- a temperature difference between two different points of at least one of the plurality of taps is out of a preset range, or a temperature difference between two different points of at least one of the plurality of taps is different from two different points of the tap.
- the electrode cell may be determined to be defective.
- An electrode cell inspection method a heating step of heating the lead; a sensing step of sensing a temperature of a target point of the plurality of tabs heated by heat conducted from the lead; and a determination step of determining whether the electrode cell is defective based on the temperature of the target point of the plurality of tabs.
- the temperature of the target point of at least one of the plurality of taps is out of a preset range, or the difference between the temperature of the target point of some of the plurality of taps and the temperature of the target point of some other taps is determined. If it is out of the set range, the electrode cell may be determined to be defective.
- the quality control of the electrode cell may be facilitated by determining the corresponding electrode cell as defective.
- FIG. 1 is a schematic diagram of an electrode cell inspection apparatus according to an embodiment of the present invention.
- FIG. 2 is a side view illustrating the periphery of the electrode tab and the electrode lead shown in FIG. 1 .
- FIG. 3 is a view for explaining the operation of the electrode cell inspection apparatus according to an embodiment of the present invention.
- FIG. 4 is a control block diagram of an electrode cell inspection apparatus according to an embodiment of the present invention.
- FIG. 5 is a flowchart of an electrode cell inspection method according to an embodiment of the present invention.
- FIG. 6 is a flowchart of an electrode cell inspection method according to another embodiment of the present invention.
- FIG. 1 is a schematic view of an electrode cell inspection apparatus according to an embodiment of the present invention
- FIG. 2 is a side view illustrating the periphery of the electrode tab and the electrode lead shown in FIG. 1 .
- the electrode cell inspection apparatus (hereinafter, 'inspection apparatus') according to an embodiment of the present invention may inspect whether a partial disconnection occurs in the tab 20 of the electrode cell 10 .
- the electrode cell 10 includes a plurality of electrodes 11 stacked with a separator 12 interposed therebetween, a plurality of tabs 20 connected to the plurality of electrodes 11 , and a plurality of tabs 20 . It may include a bonded lead 30 .
- the plurality of electrodes 11 may include an anode and a cathode alternately stacked with the separator 12 interposed therebetween.
- the tab 20 connected to the positive electrode may be the positive electrode tab 20a
- the tab 20 connected to the negative electrode may be the negative electrode tab 20b
- the positive electrode tab 20a and the negative electrode tab 20b may protrude in opposite directions with respect to the electrode cell 10 .
- the lead 30 bonded to the plurality of positive electrode tabs 20a may be the positive electrode lead 30a
- the lead 30 bonded to the plurality of negative electrode tabs 20b may be the negative electrode lead 30b.
- Each tab 20 may include a non-junction part 21 connected to the electrode 11 and spaced apart from each other, and a junction part 22 extending from the non-junction part 21 and joined to each other.
- At least a portion of the non-bonding portion 21 of the plurality of tabs 20 may be closer to each other toward the bonding portion 22 .
- Extension 22 may include an outer end of tab 20 .
- the lead 30 may be bonded to the bonding portion 22 .
- a portion including the inner end of the lead 30 may be bonded to the abutment 22 , and the other portion including the outer end of the lead 30 may protrude outward than the plurality of tabs 20 .
- the inspection apparatus can quickly and accurately inspect whether a partial disconnection occurs in the plurality of tabs 20 of the electrode cell 10 .
- the inspection device includes a heater 110 for heating the lead 30 and a thermal sensor 120 for detecting a temperature distribution of a plurality of tabs 20 heated by heat conducted from the lead 30 .
- a heater 110 for heating the lead 30
- a thermal sensor 120 for detecting a temperature distribution of a plurality of tabs 20 heated by heat conducted from the lead 30 . may include.
- the heater 110 may heat each lead 30 .
- the heater 110 heating the anode lead 30a may be the first heater 110a
- the heater 110 heating the cathode lead 30b may be the second heater 110b.
- the heater 110 may include a pair of contact bodies 111 in contact with the leads 30 .
- the pair of contact bodies 111 may be in contact with both surfaces of the lead 30 .
- the pair of contact bodies 111 may be included in a gripper that grips the lead 30 .
- the contact body 111 located on the lower side of the lead 30 supports the bottom surface of the lead 30 , and the contact body 111 located on the upper side of the lead 30 descends toward the lead 30 to lead the lead 30 . (30) can be in contact with the upper surface.
- At least one of the pair of contact bodies 111 may be heated to a preset temperature by induction heating or the like. Accordingly, the lead 30 can be quickly heated by the contact body 111 heated to a high temperature in contact with the lead 30 . In addition, since the lead 30 is fixed between the pair of contact bodies 111 , the lead 30 can be stably heated.
- the pair of contact bodies 111 may be disposed to face each other with the outer end of the lead 30 interposed therebetween.
- the pair of contact bodies 111 may be spaced apart from the plurality of tabs 20 in the length direction of the lead. Accordingly, it is possible to prevent the risk that the plurality of tabs 20 may be directly heated by the heater 110 to be thermally damaged.
- the thermal sensor 120 may be disposed on both sides of the plurality of tabs 20 in the width direction.
- the thermal sensor 120 may detect a temperature distribution in the longitudinal direction of the corners 23 of the plurality of tabs 20 .
- the thermal sensor 120 includes a plurality of tabs 20, more specifically, a first thermal sensor and a second thermal sensor disposed to face each other with a non-junction part 21 of the plurality of tabs interposed therebetween. can do. Accordingly, the thermal sensor 120 may detect a temperature distribution in the longitudinal direction of both edges 23 of the plurality of tabs 20 . In more detail, the thermal sensor 120 may detect a temperature distribution in the longitudinal direction of both sides of the edge 23 in the width direction of the non-bonding portion 21 of the plurality of tabs 20 .
- the thermal sensors 120 located on both sides of the plurality of positive electrode tabs 20a may be positive side thermal sensors 120a, and the thermal sensors 120 located on both sides of the plurality of negative electrode tabs 20b are negative side thermal sensors. It may be a thermal sensor 120b.
- each thermal sensor 120 may be an infrared camera. Therefore, even when the electrode cell 10 is stored in a pouch (not shown), it is possible to sense the temperature distribution in the longitudinal direction of the edges 23 of the plurality of tabs 20 .
- each heat sensor 120 is not limited thereto, and it is of course possible to sense the temperature distribution in another way.
- FIG. 3 is a view for explaining the operation of the electrode cell inspection apparatus according to an embodiment of the present invention.
- Heat of the heater 110 is thermally conducted to the plurality of tabs 20 through the leads 30 . Due to this heat conduction, a temperature distribution is generated in both edges 23 of each tab 20 , in which the portion closer to the lead 30 has a higher temperature and the farther away from the lead 30, the lower the temperature. In addition, when a sufficient time elapses after the heater 110 heats the lid 30 , the temperature distribution of both edges 23 of each tab 20 may be uniform.
- the temperature difference between the first point P located on the side of the lead 30 and the second point P2 located on the opposite side of the lead 30 with respect to the disconnection (C) is that the disconnection (C) does not occur. It is very large compared to the case where it is not.
- the temperature difference between the first point P1 and the second point P2 may be 10 degrees Celsius or more.
- the disconnection C of the tab 20 may be determined whether the disconnection C of the tab 20 occurs based on the temperature difference between the tabs 20 .
- the temperature difference of the edge 23 may mean a maximum value among the temperature differences between points that are consecutively adjacent to each other at a predetermined interval along the edge 23 .
- the one tap 20 may determine that the disconnection C has occurred.
- the normal temperature difference range may be set differently depending on the temperature of the heater 110 .
- the difference is If it is larger than the set normal range, it may be determined that the disconnection (C) has occurred in the some tabs 20 .
- the thermal sensor 120 detects the temperature of the target point P3 on the edge 23 to determine whether the disconnection C of the tab 20 occurs.
- the target point P3 is as close to the electrode 11 as possible among the corners 23 .
- the target point P3 may be a point where the tab 20 and the electrode 11 are connected.
- the thermal sensor 120 may be configured to detect only the temperature of the target point P3 instead of detecting the temperature distribution of the edge 23 of the tab 20 .
- the one tap 20 may determine that the disconnection C has occurred.
- the normal temperature range may be set differently depending on the temperature of the heater 110 .
- whether the tab 20 is disconnected may be determined by comparing the temperature of the target point P3 between the plurality of tabs 20 .
- the difference when the relatively low temperature sensed at the target point P3 of some tabs 20 and the relatively high temperature sensed at the target point P3 of some other tabs 20 are compared, the difference When is greater than the preset normal range, it may be determined that the disconnection (C) has occurred in some of the tabs 20 .
- FIG. 4 is a control block diagram of an electrode cell inspection apparatus according to an embodiment of the present invention.
- the inspection apparatus may further include a controller 100 .
- the controller 100 may include at least one processor.
- the controller 100 may communicate with each thermal sensor 120 to determine whether a disconnection C of each tap 120 occurs. In addition, when the disconnection C occurs in any one of the plurality of tabs 20 included in the one electrode cell 10 , the controller 100 may determine that the one electrode cell 10 is defective.
- the inspection device may further include at least one of the output interface 130 and the unloader 140 .
- the inspection apparatus may further include at least one of the output interface 130 and the unloader 140 .
- the output interface 130 may be configured to output information related to the operation of the inspection device.
- the output interface 130 may include a display or speaker.
- the controller 100 may output a failure signal through the output interface 130 .
- the unloader 140 may be configured to selectively recover the electrode cell 10 from a manufacturing line (not shown).
- the unloader 140 may be a gripper that grips and collects the electrode cell 10 .
- the controller 100 may control the unloader 140 to collect the electrode cell 10 determined to be defective from the manufacturing line. Accordingly, quality control of the manufactured electrode cells 10 may be facilitated.
- FIG. 5 is a flowchart of an electrode cell inspection method according to an embodiment of the present invention.
- the electrode cell inspection method (hereinafter, 'inspection method') according to the present embodiment may include a heating step (S10), a sensing step (S20), and a determination step (S30).
- the heater 110 may heat the lead 30 of the electrode cell 10 .
- the first heater 110a may heat the anode lead 30a
- the second heater 110b may heat the cathode lead 30b.
- the controller 100 heats at least one of the pair of contact bodies 111 included in the heater 110 to a preset temperature, and moves the pair of contact bodies 111 to control the movement of the lead 20 . can be contacted on both sides of the
- the thermal sensor 120 may measure a temperature distribution of the plurality of tabs 20 .
- the thermal sensor 120 may measure the temperature distribution in the longitudinal direction of both edges 23 of the plurality of tabs 20 .
- the thermal sensor 120 may measure the temperature distribution of both edges 23 of the non-junction part 21 .
- the temperature distribution data sensed by the thermal sensor 120 may be transmitted to the controller 100 .
- the positive-side thermal sensor 120a may measure the temperature distribution in the longitudinal direction of both edges 23 of the plurality of positive electrode tabs 20a, and the negative-side thermal sensor 120b includes the plurality of negative electrode tabs 20b. ) can measure the temperature distribution in the longitudinal direction of both edges 23 .
- the controller 100 may determine whether the electrode cell 10 is defective based on the temperature distribution of the plurality of tabs 20 .
- the controller 100 may determine the electrode cell 10 as defective.
- the controller 100 may determine the electrode cell 10 as defective when the temperature difference between two different points of at least one of the plurality of tabs 20 is out of a preset range, that is, a normal temperature difference range.
- the controller 100 may determine the electrode cell 10 as defective when the temperature difference on at least one edge 23 of the plurality of tabs 20 is out of a preset range.
- the controller 100 may set a temperature difference between two different points of the some tabs 20 among the plurality of tabs 20 and a temperature difference between two different points of the other some tabs 20 within a preset range, that is, a normal range. If it is out of , the electrode cell 10 may be determined to be defective. When the difference between the temperature difference on the edge 23 of some of the tabs 20 and the temperature difference on the edge 23 of some of the tabs 20 among the plurality of tabs 20 is out of the preset range, the controller 100 determines the electrode cell (10) can be judged as defective.
- the one electrode cell 10 may move along the manufacturing line and a subsequent process may be performed (S40).
- the unloader 140 may collect the one electrode cell 10 from the manufacturing line ( S50 ).
- FIG. 6 is a flowchart of an electrode cell inspection method according to another embodiment of the present invention.
- the thermal sensor 120 may measure the temperature of the target point P3 of the plurality of tabs 20 .
- the target point P3 may be a point adjacent to the electrode 11 on the edge 23 of each tab 20 .
- the positive side thermal sensor 120a may measure the temperature of the target point P3 on both edges 23 of the plurality of positive electrode tabs 20a
- the negative side thermal sensor 120b has a plurality of The temperature of the target point P3 on both edges 23 of the negative electrode tab 20b may be measured.
- the controller 100 may determine whether the electrode cell 10 is defective based on the temperature of the target point P3 of the plurality of tabs 20 .
- the controller 100 may determine the electrode cell 10 as defective.
- the controller 100 may determine that the electrode cell 10 is defective when the temperature of at least one of the target points P3 of the plurality of tabs 20 is out of a preset range, that is, a normal temperature range.
- the controller 100 may set the temperature difference between the temperature of the target point P3 of some of the tabs 20 and the temperature of the target point P3 of some of the tabs 20 among the plurality of tabs 20 in a preset range, that is, If it is out of the normal range, the electrode cell 10 may be determined to be defective.
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Abstract
Description
Claims (11)
- 분리막을 사이에 두고 적층된 복수개의 전극과, 상기 복수개의 전극에 연결된 복수개의 탭과, 상기 복수개의 탭에 접합된 리드를 포함하는 전극셀의 검사 장치에 있어서,상기 리드를 가열하는 히터; 및상기 리드로부터 전도되는 열에 의해 가열되는 상기 복수개의 탭의 온도 분포를 감지하는 열감지 센서를 포함하는 전극셀 검사장치.
- 제 1 항에 있어서,상기 열감지 센서와 통신하는 컨트롤러를 더 포함하고,상기 컨트롤러는,상기 복수개의 탭 중 적어도 하나의 서로 다른 두 지점간의 온도차가 기설정된 범위를 벗어나거나, 상기 복수개의 탭 중 일부 탭의 서로 다른 두 지점간의 온도차와 다른 일부 탭의 서로 다른 두 지점간의 온도차 사이의 차이가 기설정된 범위를 벗어나면, 상기 전극셀을 불량 판정하는 전극셀 검사장치.
- 제 2 항에 있어서,상기 컨트롤러에서 상기 전극셀을 불량 판정하면 불량발생 신호를 출력하는 출력 인터페이스; 또는상기 컨트롤러에서 상기 전극셀을 불량 판정하면 상기 전극셀을 제조 라인에서 회수하는 언로더 중 적어도 하나를 더 포함하는 전극셀 검사장치.
- 제 1 항에 있어서,상기 열감지 센서는,상기 복수개의 탭의 비접합부를 사이에 두고 서로 마주보게 배치되는 제1열감지 센서 및 제2열감지 센서를 포함하는 전극셀 검사장치.
- 제 1 항에 있어서,상기 히터는,상기 리드에 접하며 적어도 하나가 기설정된 온도로 가열되는 한 쌍의 접촉 바디를 포함하는 전극셀 검사장치.
- 분리막을 사이에 두고 적층된 복수개의 전극과, 상기 복수개의 전극에 연결된 복수개의 탭과, 상기 복수개의 탭에 접합된 리드를 포함하는 전극셀의 검사 장치에 있어서,상기 리드를 가열하는 히터; 및상기 리드로부터 전도되는 열에 의해 가열되는 상기 복수개의 탭의 타겟 지점의 온도를 감지하는 열감지 센서를 포함하는 전극셀 검사장치.
- 제 6 항에 있어서,상기 열감지 센서와 통신하는 컨트롤러를 더 포함하고,상기 컨트롤러는,상기 복수개의 탭의 타겟 지점 중 적어도 하나의 온도가 기설정된 범위를 벗어나거나, 상기 복수개의 탭 중 일부 탭의 타겟 지점의 온도와 다른 일부 탭의 타겟 지점의 온도의 차이가 기설정된 범위를 벗어나면, 상기 전극셀을 불량 판정하는 전극셀 검사장치.
- 분리막을 사이에 두고 적층된 복수개의 전극과, 상기 복수개의 전극에 연결된 복수개의 탭과, 상기 복수개의 탭에 접합된 리드를 포함하는 전극셀의 검사 방법에 있어서,상기 리드를 가열하는 히팅 단계;상기 리드로부터 전도되는 열에 의해 가열되는 상기 복수개의 탭의 온도 분포를 감지하는 센싱 단계; 및상기 복수개의 탭의 온도 분포에 기초하여 상기 전극셀을 불량 여부를 판정하는 판정 단계를 포함하는 전극셀 검사 방법.
- 제 8 항에 있어서,상기 판정 단계에서,상기 복수개의 탭 중 적어도 하나의 서로 다른 두 지점간의 온도차가 기설정된 범위를 벗어나거나, 상기 복수개의 탭 중 일부 탭의 서로 다른 두 지점간의 온도차와 다른 일부 탭의 서로 다른 두 지점간의 온도차의 차이가 기설정된 범위를 벗어나면, 상기 전극셀을 불량 판정하는 전극셀 검사방법.
- 분리막을 사이에 두고 적층된 복수개의 전극과, 상기 복수개의 전극에 연결된 복수개의 탭과, 상기 복수개의 탭에 접합된 리드를 포함하는 전극셀의 검사 방법에 있어서,상기 리드를 가열하는 히팅 단계;상기 리드로부터 전도되는 열에 의해 가열되는 상기 복수개의 탭의 타겟 지점의 온도를 감지하는 센싱 단계; 및상기 복수개의 탭의 타겟 지점의 온도에 기초하여 상기 전극셀의 불량 여부를 판정하는 판정 단계를 포함하는 전극셀 검사 방법.
- 제 10 항에 있어서,상기 판정 단계에서,상기 복수개의 탭 중 적어도 하나의 타겟 지점의 온도가 기설정된 범위를 벗어나거나, 상기 복수개의 탭 중 일부 탭의 타겟 지점의 온도와 다른 일부 탭의 타겟 지점의 온도의 차이가 기설정된 범위를 벗어나면, 상기 전극셀을 불량 판정하는 전극셀 검사방법.
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