JP7484870B2 - 組電池の劣化診断装置、及び組電池の劣化診断方法 - Google Patents
組電池の劣化診断装置、及び組電池の劣化診断方法 Download PDFInfo
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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]
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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Description
上記のように、放電終了電圧が放電下限電圧(放電をこれ以上継続すると過放電に至ることを示す下限電圧)に基づいて設定されることで、組電池の診断中におけるセルの劣化を抑制しやすくなる。放電終了電圧は、放電下限電圧と一致するように設定されてもよいし、放電下限電圧よりも少し高く設定されてもよい。
Claims (10)
- 組電池に含まれる複数のセルの各々の放電を実行し、放電中に各セルの電圧を測定しながら、所定の放電終了タイミングになると放電を終了する放電部と、
前記複数のセルの少なくとも1つについて放電開始電圧から所定の放電終了電圧までの電圧の推移を示す電圧データを用いて、前記組電池の劣化度合いを推定する推定部と、
を含み、
前記放電部は、前記複数のセルのいずれかのセルの電圧が前記放電終了電圧に達すると、そのセルの前記電圧データと、前記複数のセルの各々の放電開始時の電圧とを用いて前記放電終了タイミングを決定する、組電池の劣化診断装置。 - 前記放電部は、前記複数のセルのうち放電中に最も早く電圧が前記放電終了電圧に達したセルである対象セルの放電開始時の電圧が、前記複数のセルの各々の放電開始時の電圧のうち最も大きい電圧である最大セル電圧に該当するか否かを判断し、
前記対象セルの放電開始時の電圧が前記最大セル電圧に該当しないと判断された場合には、前記放電部は、前記対象セルの放電を前記最大セル電圧から開始したと仮定した場合に前記対象セルの電圧が前記放電終了電圧に達するタイミングを、前記放電終了タイミングとして決定し、
前記対象セルの放電開始時の電圧が前記最大セル電圧に該当すると判断された場合には、前記対象セルの電圧が前記放電終了電圧に達した後、前記放電部が放電を即時終了する、請求項1に記載の組電池の劣化診断装置。 - 前記放電部は、前記複数のセルのうち放電中に最も早く電圧が前記放電終了電圧に達したセルである対象セルの放電を所定の電圧から開始したと仮定した場合に、前記対象セルの電圧が前記放電終了電圧に達するタイミングを、前記放電終了タイミングとして決定する、請求項1に記載の組電池の劣化診断装置。
- 前記放電終了電圧は、前記複数のセルに共通の放電下限電圧に基づいて設定される、請求項1~3のいずれか一項に記載の組電池の劣化診断装置。
- 前記組電池に含まれる全てのセルは直列に接続されており、
前記放電部は、前記複数のセルの各々の放電中の電流値を一定に保つ、請求項1~4のいずれか一項に記載の組電池の劣化診断装置。 - 前記組電池は、車両に搭載された電力負荷に電力を供給するように構成され、
前記放電部は、前記電力負荷を制御することにより前記放電を実行する、請求項1~5のいずれか一項に記載の組電池の劣化診断装置。 - 組電池に含まれる複数のセルの各々の電圧を測定しながら各セルの放電を実行することと、
放電中に前記複数のセルのいずれかのセルの電圧が所定の放電終了電圧に達すると、そのセルの放電開始電圧から前記放電終了電圧までの電圧の推移を示す電圧データと、前記複数のセルの各々の放電開始時の電圧とに基づいて放電終了タイミングを決定することと、
前記放電終了タイミングになると前記放電を終了することと、
放電中に取得された前記複数のセルの少なくとも1つの電圧データを用いて前記組電池の劣化度合いを推定することと、
を含む、組電池の劣化診断方法。 - 前記放電は、前記組電池が車両に搭載された状態で実行され、
前記組電池の初期状態の満充電容量は5kWh以下である、請求項7に記載の組電池の劣化診断方法。 - 前記複数のセルのうち放電中に最も早く電圧が前記放電終了電圧に達したセルである対象セルの放電開始時の電圧が、前記複数のセルの各々の放電開始時の電圧のうち最も大きい電圧である最大セル電圧に該当するか否かを判断することと、
前記対象セルの放電開始時の電圧が前記最大セル電圧に該当しないと判断された場合には、前記対象セルの放電を前記最大セル電圧から開始したと仮定した場合に前記対象セルの電圧が前記放電終了電圧に達するタイミングを、前記放電終了タイミングとして決定することと、
前記対象セルの放電開始時の電圧が前記最大セル電圧に該当すると判断された場合には、前記対象セルの電圧が前記放電終了電圧に達した後、放電を即時終了することと、
をさらに含む、請求項7に記載の組電池の劣化診断方法。 - 前記複数のセルのうち放電中に最も早く電圧が前記放電終了電圧に達したセルである対象セルの放電を所定の電圧から開始したと仮定した場合に、前記対象セルの電圧が前記放電終了電圧に達するタイミングを、前記放電終了タイミングとして決定することをさらに含む、請求項7に記載の組電池の劣化診断方法。
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US17/893,321 US20230137917A1 (en) | 2021-11-01 | 2022-08-23 | Deterioration diagnosis apparatus of assembled battery and deterioration diagnosis method of assembled battery |
CN202211034239.1A CN116068445A (zh) | 2021-11-01 | 2022-08-26 | 电池组的劣化诊断装置及电池组的劣化诊断方法 |
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Citations (4)
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JP2010273413A (ja) | 2009-05-20 | 2010-12-02 | Nissan Motor Co Ltd | 組電池の制御装置 |
JP2013110891A (ja) | 2011-11-22 | 2013-06-06 | Toyota Motor Corp | 車載バッテリの診断装置 |
JP2019113414A (ja) | 2017-12-22 | 2019-07-11 | 三菱自動車工業株式会社 | 二次電池の劣化度合測定装置 |
JP2020038812A (ja) | 2018-09-05 | 2020-03-12 | 株式会社Gsユアサ | 二次電池の再利用方法、管理装置、及びコンピュータプログラム |
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JP2010273413A (ja) | 2009-05-20 | 2010-12-02 | Nissan Motor Co Ltd | 組電池の制御装置 |
JP2013110891A (ja) | 2011-11-22 | 2013-06-06 | Toyota Motor Corp | 車載バッテリの診断装置 |
JP2019113414A (ja) | 2017-12-22 | 2019-07-11 | 三菱自動車工業株式会社 | 二次電池の劣化度合測定装置 |
JP2020038812A (ja) | 2018-09-05 | 2020-03-12 | 株式会社Gsユアサ | 二次電池の再利用方法、管理装置、及びコンピュータプログラム |
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