JPWO2015151848A1 - 二次電池状態検出装置および二次電池状態検出方法 - Google Patents
二次電池状態検出装置および二次電池状態検出方法 Download PDFInfo
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Abstract
Description
このような構成によれば、二次電池が交換されたことを正確に検出することができる。
このような構成によれば、劣化した二次電池が同種の新品の二次電池に交換されたことを正確に判定することができる。
このような構成によれば、異なる種類の二次電池にドライバによって交換されたことを正確に判定することができる。
このような構成によれば、素子値を消去することで、新たな二次電池の等価回路に置き換え、交換された二次電池の状態を正確に検出することができる。
このような構成によれば、使用履歴を消去することで、新たな二次電池を正確に制御することができる。
このような構成によれば、温度およびSOCの値に拘わらず、交換の有無を正確に判定することができる。
このような方法によれば、二次電池が交換されたことを正確に検出することができる。
図1は、本発明の実施形態に係る二次電池状態検出装置を有する車両の電源系統を示す図である。この図において、二次電池状態検出装置1は、制御部10、電圧センサ11、電流センサ12、温度センサ13、および、放電回路15を主要な構成要素としており、二次電池14の状態を検出する。ここで、制御部10は、電圧センサ11、電流センサ12、および、温度センサ13からの出力を参照し、二次電池14の状態を検出する。電圧センサ11は、二次電池14の端子電圧を検出し、制御部10に通知する。電流センサ12は、二次電池14に流れる電流を検出し、制御部10に通知する。温度センサ13は、二次電池14自体または周囲の環境温度を検出し、制御部10に通知する。放電回路15は、例えば、直列接続された半導体スイッチと抵抗素子等によって構成され、制御部10によって半導体スイッチがオン/オフ制御されることにより二次電池14を間欠的に放電させる。
つぎに、図を参照して、本発明の実施形態の動作原理について説明する。本実施形態では、図3に示す構成を有する二次電池14の等価回路を学習処理によって求める。そして、学習処理が実行される毎に、新たに求めた素子値と、過去に求めた素子値とを比較し、素子値が不連続に変化した場合には、二次電池14が交換されたと判定する。
以上の実施形態は一例であって、本発明が上述したような場合のみに限定されるものでないことはいうまでもない。例えば、以上の実施形態では、反応抵抗Rctおよび電気二重層容量Cを別々に使用して二次電池14の交換を判定するようにしたが、例えば、以下の式(1)によって得られた値Kと、閾値とを比較することで二次電池14の交換の有無を判定するようにしてもよい。なお、W1,W2,W3は重み係数であり、同種または異種に拘わらず二次電池14が交換されたときに、Kの変化が最大になるように設定される。
10 制御部
10a CPU(学習手段、判定手段、消去手段)
10b ROM
10c RAM(記憶装置)
10d 通信部
10e I/F
11 電圧センサ
12 電流センサ
13 温度センサ
14 二次電池
15 放電回路
16 オルタネータ
17 エンジン
18 スタータモータ
19 負荷
Claims (7)
- 車両に搭載される二次電池の状態を検出する二次電池状態検出装置において、
前記二次電池の電圧および電流に基づいて、前記二次電池の等価回路の素子値を学習する学習手段と、
前記学習手段による異なるタイミングの学習によって得られた素子値を比較し、少なくとも1の素子値が所定の閾値以上変化している場合に、前記二次電池が交換されたと判定する判定手段と、
を有することを特徴とする二次電池状態検出装置。 - 前記判定手段は、前記等価回路を構成する電気二重層容量が所定の閾値以上変化し、反応抵抗の変化が所定の閾値以下の場合には、劣化度の異なる同種の二次電池へ交換されたと判定することを特徴とする請求項1に記載の二次電池状態検出装置。
- 前記判定手段は、前記等価回路を構成する反応抵抗が所定の閾値以上変化している場合には、異なる種類の二次電池に交換されたと判定することを特徴とする請求項1または2に記載の二次電池状態検出装置。
- 前記判定手段によって前記二次電池が交換されたと判定された場合には、過去に学習して記憶装置に記憶されている前記等価回路の素子値を消去する消去手段を有することを特徴とする請求項1乃至3のいずれか1項に記載の二次電池状態検出装置。
- 前記消去手段は、前記判定手段によって前記二次電池が交換されたと判定された場合には、前記記憶装置に記憶されている前記二次電池の使用の履歴を示す情報を消去することを特徴とする請求項4に記載の二次電池状態検出装置。
- 前記等価回路の素子値は、基準温度および基準SOCにおける素子値になるように補正されていることを特徴とする請求項1乃至5のいずれか1項に記載の二次電池状態検出装置。
- 車両に搭載される二次電池の状態を検出する二次電池状態検出方法において、
前記二次電池に電圧および電流に基づいて、前記二次電池の等価回路の素子値を学習する学習ステップと、
前記学習ステップにおける異なるタイミングの学習によって得られた素子値を比較し、少なくとも1の素子値が所定の閾値以上変化している場合に、前記二次電池が交換されたと判定する判定ステップと、
を有することを特徴とする二次電池状態検出方法。
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PCT/JP2015/058389 WO2015151848A1 (ja) | 2014-04-01 | 2015-03-19 | 二次電池状態検出装置および二次電池状態検出方法 |
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US10229534B2 (en) * | 2017-01-10 | 2019-03-12 | Ditto Technologies, Inc. | Modeling of a user's face |
US10173548B2 (en) * | 2017-05-30 | 2019-01-08 | GM Global Technology Operations LLC | Method for determining characteristics of battery segments for operating a battery pack with modules of different chemical makeup field |
US10855095B2 (en) | 2017-10-12 | 2020-12-01 | Infineon Technologies Ag | Battery impedance detection using voltage and current measurements |
US20190111800A1 (en) * | 2017-10-16 | 2019-04-18 | Neapco Intellectual Property Holdings, Llc | High coverage battery usage monitor |
JP6911747B2 (ja) * | 2017-12-25 | 2021-07-28 | トヨタ自動車株式会社 | 電池情報処理装置、電池製造支援装置、組電池、電池情報処理方法、及び組電池の製造方法 |
TW201939419A (zh) * | 2018-03-02 | 2019-10-01 | 光陽工業股份有限公司 | 供電裝置交換方法及其銷售端行動裝置 |
JP7072414B2 (ja) * | 2018-03-20 | 2022-05-20 | 古河電気工業株式会社 | 充電可能電池状態検出装置および充電可能電池状態検出方法 |
CN111919330A (zh) * | 2018-03-27 | 2020-11-10 | 住友电气工业株式会社 | 电池监测方法、电池监测装置和电池监测系统 |
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JP6422481B2 (ja) | 2018-11-14 |
CN106133994B (zh) | 2019-06-18 |
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