JP7374327B2 - ビッグデータ基盤の電池検査方法 - Google Patents
ビッグデータ基盤の電池検査方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 41
- 238000007689 inspection Methods 0.000 title claims description 38
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- 239000002184 metal Substances 0.000 claims description 91
- 238000012360 testing method Methods 0.000 claims description 24
- 230000006698 induction Effects 0.000 claims description 19
- 238000004458 analytical method Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- -1 nickel metal hydride Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- H01M10/00—Secondary cells; Manufacture thereof
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- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- 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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/023—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil
- G01N27/025—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil a current being generated within the material by induction
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- 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
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- 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
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- 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
- G01N27/9046—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 by analysing electrical signals
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- H01M50/50—Current conducting connections for cells or batteries
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Description
25個の正常電池金属部と25個の不良電池金属部とに対して本発明のビッグデータ基盤の電池検査方法を適用して検査を行った。
弱溶接された電池10個、過溶接された電池10個及び正常溶接された電池10で、総30個の電池金属部に対して本発明のビッグデータ基盤の電池検査方法を適用して検査を行った。
11 電極タップ
12 電極リード
13 タップリード連結領域
Claims (9)
- 送信コイルに交流電流である入力電流を入力し、前記送信コイルから生成された1次磁場を電池金属部に照射して、前記電池金属部に渦電流を誘導する渦電流誘導段階と、
前記渦電流誘導段階で生成された前記渦電流によって生成された2次磁場を受信コイルに入力し、前記2次磁場によって前記受信コイルに生成された誘導起電力を測定する出力電圧測定段階と、
入力電流値及び出力電圧値に基づいてインピーダンスを算出するインピーダンス算出段階と、
インピーダンス値から実数部と虚数部とを分離して判別関数に入力し、前記判別関数から判別値を出力するインピーダンス分析段階と、
前記インピーダンス分析段階で出力された前記判別値に基づいて、前記電池金属部の状態を判断する状態判断段階と、を含み、
前記渦電流誘導段階で、
前記入力電流は、それぞれ異なる設定周波数を有する複数の部分交流電流を含み、
前記インピーダンス算出段階で、
前記インピーダンスは、前記出力電圧値を前記入力電流値で割ることによって算出され、
前記インピーダンスは、それぞれの前記設定周波数に対応する複数の部分インピーダンスを含み、
前記インピーダンス分析段階で、
前記判別関数は、複数設けられ、
複数の前記判別関数に対するそれぞれの前記判別値は、下記の数式1によって算出される
ビッグデータ基盤の電池検査方法。
- 前記入力電流は、下記の数式2によって算出される、請求項1に記載のビッグデータ基盤の電池検査方法。
- 前記渦電流誘導段階で、
前記送信コイルは、前記送信コイルの長手方向が前記電池金属部の表面に垂直な方向に配された状態で前記電池金属部の表面に前記1次磁場を照射する、請求項1又は2に記載のビッグデータ基盤の電池検査方法。 - 前記出力電圧測定段階で、
前記受信コイルは、前記受信コイルの長手方向が前記電池金属部の表面に垂直な方向になるように配される、請求項1から3のいずれか一項に記載のビッグデータ基盤の電池検査方法。 - 前記判別係数は、複数のサンプル電池金属部から測定されるサンプルインピーダンス値と、前記複数のサンプル電池金属部の状態情報値と、に基づいて算出される、請求項1に記載のビッグデータ基盤の電池検査方法。
- 前記状態情報値は、サンプル電池金属部のΩ抵抗値、溶接厚さ、引張強度のうち少なくとも1つ以上の情報を含む、請求項5に記載のビッグデータ基盤の電池検査方法。
- 前記インピーダンス分析段階で1つの前記電池金属部ごとにm個の判別値が算出され、
前記状態判断段階で、前記m個の判別値のうち少なくとも2つ以上の判別値を同時に考慮して、前記電池金属部の状態を判断する、請求項1、5及び6のいずれか一項に記載のビッグデータ基盤の電池検査方法。 - 前記状態判断段階は、
前記m個の判別値のうち、2個の判別値を選択する判別値選択段階と、
前記判別値選択段階で選択された判別値を各軸とする2次元の判別グラフを出力するグラフ出力段階と、
前記グラフ出力段階で出力された前記判別グラフ上に前記電池金属部の判別値を座標で表示するデータマーキング段階と、を含む、請求項7に記載のビッグデータ基盤の電池検査方法。 - 前記グラフ出力段階で、
前記判別グラフには、前記電池金属部の状態を示す複数の状態領域が表示される、請求項8に記載のビッグデータ基盤の電池検査方法。
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KR1020200022634A KR20210107997A (ko) | 2020-02-25 | 2020-02-25 | 빅데이터 기반 전지 검사 방법 |
KR10-2020-0022634 | 2020-02-25 | ||
PCT/KR2021/000165 WO2021172735A1 (ko) | 2020-02-25 | 2021-01-07 | 빅데이터 기반 전지 검사 방법 |
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KR20230140482A (ko) * | 2022-03-22 | 2023-10-06 | 주식회사 엘지에너지솔루션 | 전지 셀에서의 리튬 석출 검사 장치 및 방법 |
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US20060109003A1 (en) | 2004-10-06 | 2006-05-25 | Ener1 Group, Inc. | Method and apparatus for eddy current-based quality inspection of dry electrode structure |
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US5453689A (en) * | 1991-12-06 | 1995-09-26 | Massachusetts Institute Of Technology | Magnetometer having periodic winding structure and material property estimator |
DE4201502C2 (de) * | 1992-01-21 | 1995-12-14 | Siemens Ag | Verfahren und Anordnung zur elektrischen Wirbelstromprüfung |
US6285185B1 (en) * | 1992-07-22 | 2001-09-04 | U.S. Philips Corporation | Apparatus and method for determining the type of a battery or accumulator by use of magnetic fields |
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US8928316B2 (en) * | 2010-11-16 | 2015-01-06 | Jentek Sensors, Inc. | Method and apparatus for non-destructive evaluation of materials |
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US20060109003A1 (en) | 2004-10-06 | 2006-05-25 | Ener1 Group, Inc. | Method and apparatus for eddy current-based quality inspection of dry electrode structure |
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