WO2006046578A1 - 電池外装ケースの傷の検査装置及び検査方法 - Google Patents
電池外装ケースの傷の検査装置及び検査方法 Download PDFInfo
- Publication number
- WO2006046578A1 WO2006046578A1 PCT/JP2005/019629 JP2005019629W WO2006046578A1 WO 2006046578 A1 WO2006046578 A1 WO 2006046578A1 JP 2005019629 W JP2005019629 W JP 2005019629W WO 2006046578 A1 WO2006046578 A1 WO 2006046578A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outer case
- battery outer
- magnetic
- magnetic sensor
- magnetic flux
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 21
- 230000004907 flux Effects 0.000 claims abstract description 33
- 238000012545 processing Methods 0.000 claims abstract description 18
- 238000007689 inspection Methods 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 30
- 239000010959 steel Substances 0.000 description 30
- 230000007246 mechanism Effects 0.000 description 8
- 230000007547 defect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000010409 ironing Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/9026—Arrangements for scanning by moving the material
-
- 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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a cylindrical battery outer case having a magnetic material force, such as a thin steel plate, for example, and automatically inspects the presence or absence of a flaw near the surface and displays the position of the flaw, etc. It relates to the inspection method.
- a thin steel plate subjected to a surface treatment such as nickel plating is used for an outer case.
- Some exterior cases are manufactured by processing a sheet steel material into a cylindrical shape by deep drawing, or another case that manufactures an exterior case by covering the ironing case. In a manufacturing method such as deep drawing, the steel sheet comes into contact with a press die or a tool during the processing, and the thin steel plate undergoes strong deformation and undergoes large deformation.
- a dry cell battery When used for a long period of time, a dry cell battery may leak due to deterioration of the electrolyte, etc. If the liquid leak occurs, it will contaminate and damage electronic equipment powered by the dry cell battery.
- a reverse current may flow through the battery, generating gas and causing the battery to burst.
- the battery outer case is 0. lmn! Since it is a thin steel plate of about 0.2 mm, if there is a flaw in the steel plate, the force at that location also causes liquid leakage and rupture. Therefore, it is necessary to eliminate as much as possible defective products in the outer case of the dry cell with scratches near the surface.
- a magnetic exploration method for inspecting scratches near the surface of a steel sheet.
- This utilizes the phenomenon that the magnetic flux flowing near the surface of the steel sheet bends at the site where there are defects such as cracks and leaks outside the surface force of the steel sheet.
- a magnetic sensor By detecting the leakage portion of the magnetic flux with a magnetic sensor, it is possible to search for a flaw near the surface of the steel plate.
- iron powder may be sprayed and the state of aggregation observed visually.
- Japanese Patent Application Laid-Open No. 56-61645 discloses an apparatus for detecting a magnetic flux leak using a magnetic sensor and searching for a flaw near the surface of a steel plate. As shown in FIG. 7, this apparatus inspects scratches on a steel plate 20 that is a material to be examined. On the upper part of the steel plate 20, a detection mechanism 21 fitted in the guide rod 8 is arranged.
- the detection mechanism 21 has a gate-shaped frame body 4, and both sides thereof have leg portions 4 A and 4 B extending to a position directly above the steel plate 20, and an excitation coil 5 is attached to the center of the frame body 4.
- the detection mechanism 21 is provided with a plurality of magnetic sensors 6 at positions close to the steel plate 20, and the distance between the steel plate 20 and the magnetic sensor 6 is set to 1 mm or less.
- a current is passed through the exciting coil 5 to make the frame 4 an electromagnet.
- the foot 4A is an N pole
- the magnetic flux by this flows into the steel plate 20 from the foot 4A, flows near the surface, and flows into the foot 4B, which is the S pole.
- the magnetic flux is the surface force of the steel plate 20 and the leakage magnetic flux is detected by the magnetic sensor 6.
- the detection signal is processed by a signal processing device (not shown), and the position of the flaw is measured.
- the detection mechanism 21 is guided by the guide rod 8 and moves in the width direction of the steel plate 20, and inspects the scratch while scanning the steel plate 20.
- Patent Document 1 Japanese Patent Laid-Open No. 56-61645
- the method for searching for flaws in a steel sheet that detects leakage magnetic flux is a relatively simple device, but can detect fine flaws near the surface.
- the conventional exploration method based on the detection of leakage magnetic flux has been used exclusively for exploring flaws in, for example, a steel plate on a flat plate as disclosed in Patent Document 1.
- the outer case of the battery is cylindrical, and the distance from the surface of the outer case that is the material to be inspected changes only by moving the magnetic sensor in parallel. Inspection is therefore impossible.
- moving the magnetic sensor along the circumference of the cylindrical outer case complicates the guide mechanism and may cause noise in the detection signal due to the movement of the magnetic sensor.
- An object of the present invention is to detect a flaw existing in the vicinity of the surface of a cylindrical battery outer case made of, for example, a steel plate, which is a magnetic body without such inconvenience.
- an object of the present invention is to accurately inspect a scratch in a cylindrical battery outer case with a simple device. That is, the present invention
- a rotating device that rotates the battery outer case around its cylindrical central axis, a magnetic pole of a magnet placed opposite to the outer side of the battery outer case so as to cause a magnetic flux to flow through the battery outer case, and the battery A magnetic sensor placed close to the outer case, and
- It includes a signal processing device that processes the signal detected by the magnetic sensor and a display device that displays the processed result!
- the inspection apparatus is characterized by this.
- the magnetic sensor is configured to be movable in the axial direction in parallel to the central axis of the cylindrical battery outer case, and the axial direction of the battery outer case A flaw can be detected by scanning the magnetic sensor.
- a plurality of the magnetic sensors can be arranged along the cylindrical battery outer case, and each of the magnetic sensors can detect a flaw.
- the present invention can also be implemented as a method invention.
- a method for inspecting a scratch on a cylindrical battery outer case
- the inspection method is characterized by this.
- FIG. 1 is a schematic diagram of a battery outer case inspection device according to the present invention.
- FIG. 2 is a diagram showing the arrangement of magnetic sensors in the inspection apparatus of the present invention.
- FIG. 3 is an explanatory view showing the flow of magnetic flux in the battery outer case.
- FIG. 4 is a view showing a modified example of the arrangement of the magnetic sensor of the present invention.
- FIG. 5 is a diagram showing a test result of the present invention.
- FIG. 6 is a diagram for explaining leakage magnetic flux.
- FIG. 7 is a view showing a conventional apparatus for searching for scratches on a steel sheet by leakage magnetic flux.
- 1 is a battery outer case
- 2 is a rotating device
- 4 is a frame
- 5 is an exciting coil
- 6 is a magnetic sensor
- 11 is a signal processing device
- 12 is Each display device is shown.
- FIG. 1 is a schematic view showing an outline of an inspection apparatus according to the present invention.
- FIG. 2 is a diagram showing the configuration of the battery outer case and the magnetic sensor according to the present invention
- FIG. 3 is an explanatory diagram showing how magnetic flux flows through the battery outer case.
- FIG. 4 shows a modification of the configuration of the magnetic sensor.
- a battery outer case 1 as a material to be inspected is attached to a shaft 3 of a rotating device 2 such as a motor so as to be rotatable around a cylindrical central axis.
- Shaft 3 is made of a non-magnetic material so that magnetic flux does not flow through it!
- the battery outer case 1 is directly attached to the shaft 3 of the rotating device 2 such as a motor.
- the rotating mechanism of the battery outer case 1 is via a transmission device such as a belt or a friction vehicle. It is also possible to adopt a mechanism that rotates the At the position facing the radial direction of the battery outer case 1, there is a magnet.
- both end portions of the frame body 4 serving as the magnetic poles are placed close to each other, and the exciting coil 5 is attached to the center portion of the frame body 4.
- the entire device is of a vertical type in which both ends of the frame body 4 are positioned upward and the exciting coil 5 is positioned downward, and the rotating device 2 and the frame body 4 are arranged in a frame (not shown). It is fixed.
- an electromagnet is applied as the magnet, a permanent magnet can be adopted instead of the magnet, and in this case, the exciting coil 5 is not necessary.
- a magnetic sensor 6 is disposed at a close position having an interval of, for example, lmm.
- the magnetic sensor 6 is a well-known sensor using a Hall element or the like, and is attached to the detection head 7.
- the detection head 7 is fitted into a guide rod 8 fixed to the frame, and is slid in the axial direction of the battery outer case 1 by an actuator 9. Instead of the actuator 9, it may be moved using a feed screw mechanism.
- the signal detected by the magnetic sensor 6 is input to the signal processing device 11 through the amplifier 10, where necessary processing for extracting a signal corresponding to the flaw is performed and then sent to the display device 13.
- the frame 4 becomes an electromagnet, and N pole and S pole are formed at both ends of the frame 4 placed in the vicinity of the rotating battery outer case 1. Arise. Then, as shown in FIG. 3, the magnetic flux flows from the N pole to the S pole through the battery outer case 1. When using a permanent magnet, place the N pole and S pole facing each other with the battery outer case 1 in between. In FIG. 3, the thickness of the battery outer case 1 is emphasized for easy understanding. The actual thickness is as thin as 0.1 mm to 0.2 mm.
- the magnetic flux passing through the battery outer case 1 mainly flows near the surface thereof, and if there is a flaw such as a defect at this time, the magnetic flux leaks from the surface of the battery outer case 1.
- the leakage magnetic flux can be detected by the magnetic sensor 6 to inspect the presence or absence of scratches.
- scratches can be detected over the entire circumference of the cylindrical battery outer case 1 at the position where the magnetic sensor 6 is placed.
- the measurement inspection by a plurality of rotations is preferable in order to improve the force inspection accuracy that can inspect the entire circumference in one rotation.
- the magnetic sensor 6 When the magnetic sensor 6 is moved in the axial direction of the battery outer case 1 and a scratch is detected at each position, the entire surface of the battery outer case 1 is inspected. Instead of moving one magnetic sensor 6 in the axial direction, a plurality of magnetic sensors 6 are arranged along the battery outer case 1 as shown in the modification of FIG. However, it is also possible to configure so that the flaw is simultaneously detected at that position. According to this, since the magnetic sensor 6 can be moved in the width direction to inspect the entire surface for scratches that need to be repeated, the inspection time is greatly shortened and the battery outer case that is produced in large quantities can be manufactured. It is suitable for equipment that inspects in line. Further, since the magnetic sensor 6 is fixed, no noise is generated due to the movement of the magnetic sensor. Also at this time, the inspection accuracy can be improved by performing measurement and inspection by rotating the battery outer case 1 a plurality of times. In this modification, detection signals from a plurality of magnetic sensors 6 are sent to the signal processing device 11 as multi-channel signals.
- FIG. 5 shows the results when the wound of the battery outer case was inspected using the inspection apparatus of the present invention.
- This is a rotating battery case with a fine scratch
- the signal detected by the magnetic sensor is displayed on the oscilloscope, which is the display device, via the signal processing device.
- the horizontal axis is the time axis.
- the vertical axis represents the signal level. In the inspection result, a sharp peak of the signal level due to surface scratches appears every rotation of the battery outer case, and it can be seen that fine scratches can be detected by the apparatus of the present invention.
- the present invention is designed to inspect a flaw in a cylindrical battery outer case made of, for example, a steel plate, which is a magnetic material, so that magnetic flux is applied to the battery outer case while rotating the battery outer case.
- the leakage magnetic flux is detected by a magnetic sensor placed close to the battery outer case and displayed on the display device.
- the frame body serving as both poles of the magnet is placed vertically so that both ends thereof are on top, but this may be horizontally placed.
- the display device is not limited to an oscilloscope, and it is obvious that various means such as a device that stores and displays digital data on a recording medium can be adopted.
- the battery outer case is rotated around its cylindrical central axis, a magnetic flux is caused to flow through the rotating battery outer case by a magnet, and the magnet is disposed close to the battery outer case.
- the sensor detects the magnetic flux leakage when the battery case is damaged. Since the battery outer case rotates around the central axis, its surface and magnetic Scratches present in the cylindrical battery outer case can be detected stably without changing the distance to the sensor. In addition, since it has a signal processing device and display device that processes and displays the detection signal of the magnetic sensor, it is possible to clearly grasp the position of the flaw.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05805287.9A EP1806577A4 (en) | 2004-10-28 | 2005-10-25 | DEVICE AND METHOD FOR INSPECTING SCRATCHES ON OUTER CELL BODIES |
CN2005800351079A CN101040182B (zh) | 2004-10-28 | 2005-10-25 | 用于检查电池外壳上的微伤的设备和方法 |
US11/718,319 US8035373B2 (en) | 2004-10-28 | 2005-10-25 | Device and method for inspecting scratches on cell external case |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004313824 | 2004-10-28 | ||
JP2004-313824 | 2004-10-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006046578A1 true WO2006046578A1 (ja) | 2006-05-04 |
Family
ID=36227819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/019629 WO2006046578A1 (ja) | 2004-10-28 | 2005-10-25 | 電池外装ケースの傷の検査装置及び検査方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8035373B2 (ja) |
EP (1) | EP1806577A4 (ja) |
KR (1) | KR20070072500A (ja) |
CN (1) | CN101040182B (ja) |
WO (1) | WO2006046578A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5640298B2 (ja) * | 2010-08-27 | 2014-12-17 | Fdk株式会社 | 磁気光学探傷方法及びそれに用いる装置 |
US20140002069A1 (en) * | 2012-06-27 | 2014-01-02 | Kenneth Stoddard | Eddy current probe |
CN114295984A (zh) | 2013-03-14 | 2022-04-08 | 加州理工学院 | 检测电子和电化学能源单元异常 |
WO2017059351A1 (en) | 2015-10-01 | 2017-04-06 | California Institute Of Technology | Systems and methods for monitoring characteristics of energy units |
KR102023739B1 (ko) | 2019-04-17 | 2019-09-20 | 주식회사 엘지화학 | 와전류를 이용한 전지셀 내부의 균열 검사 방법 및 검사 장치 |
US11675086B1 (en) * | 2019-08-20 | 2023-06-13 | Scan Systems, Corp. | Time-of-flight-based apparatus, systems, and methods for measuring tubular goods |
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- 2005-10-25 CN CN2005800351079A patent/CN101040182B/zh not_active Expired - Fee Related
- 2005-10-25 EP EP05805287.9A patent/EP1806577A4/en not_active Withdrawn
- 2005-10-25 KR KR1020077006831A patent/KR20070072500A/ko not_active Application Discontinuation
- 2005-10-25 US US11/718,319 patent/US8035373B2/en not_active Expired - Fee Related
- 2005-10-25 WO PCT/JP2005/019629 patent/WO2006046578A1/ja active Application Filing
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See also references of EP1806577A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN101040182A (zh) | 2007-09-19 |
KR20070072500A (ko) | 2007-07-04 |
EP1806577A4 (en) | 2013-05-29 |
EP1806577A1 (en) | 2007-07-11 |
US8035373B2 (en) | 2011-10-11 |
CN101040182B (zh) | 2010-09-08 |
US20080129287A1 (en) | 2008-06-05 |
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