JP2021001864A - 開発支援装置、開発支援方法、および状態検知方法 - Google Patents
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Abstract
Description
この構成によれば、SOCの変化量に対する動作電圧の変化量が他の領域よりも相対的に高い高変化量領域のSOC−動作電圧特性が反映された等価回路モデルを用いて、蓄電デバイスの挙動を推定するので、例えば、車両において充放電を頻繁に繰り返すような充電制御が実施されている場合であっても、精度良く蓄電デバイスの挙動を推定できる。更に、高SOC領域における分極電圧の立ち上がり特性を等価回路モデルに反映できるので、充電末期における分極変化に対応した電流、電圧挙動を比較的良く再現できる。
この構成によれば、SOCの変化量に対する動作電圧の変化量が他の領域よりも相対的に高い高変化量領域のSOC−動作電圧特性が反映された等価回路モデルを用いて、蓄電デバイスの挙動を推定するので、例えば、車両において充放電を頻繁に繰り返すような充電制御が実施されている場合であっても、精度良く蓄電デバイスの挙動を推定できる。更に、高SOC領域における分極電圧の立ち上がり特性を等価回路モデルに反映できるので、充電末期における分極変化に対応した電流、電圧挙動を比較的良く再現できる。
この構成によれば、SOCの変化量に対する動作電圧の変化量が他の領域よりも相対的に高い高変化量領域のSOC−動作電圧特性が反映された等価回路モデルを用いて、蓄電デバイスの電池状態を推定するので、例えば、車両において充放電を頻繁に繰り返すような充電制御が実施されている場合であっても、精度良く蓄電デバイスの電池状態を推定できる。更に、高SOC領域における分極電圧の立ち上がり特性を等価回路モデルに反映できるので、充電末期における分極変化に対応した電池状態を比較的良く再現できる。
V(t)=Vdc(t)+Vp(t)+Vo(t)
のように記述することができる。
ここで、電流の時間変動に着目すると、実測電流が制限電流到達後に早期に垂下しているのに対し、自技会モデルでは、一定時間だけ制限電流が流れた後に電流垂下に移行している現象がみられた。実測のように、頻繁な充放電において充電電流が早期に垂下する原因としては、直前の放電分極の影響が考えられる。例えば、充電開始時の電圧を放電分極の減少と充電分極の増加との合成と考えると、充電直前の充電量が少ない場合には、放電分極が小さくなるため、充電開始時の電圧が充電分極の増加の影響を受けやすくなり、早期に電圧上昇となることが想定される。本願のモデル作成では、試験Bで得られたSOC特性をモデルに反映することで、高SOC領域の分極特性を考慮している。すなわち、この特性を基に充電分極の増加をより正確に再現できるように設計したため、電流および積算電流量の時間変動を精度よく再現できたと考えられる。
101 制御部
102 記憶部
103 通信部
104 操作部
105 表示部
200 クライアント装置
201 制御部
202 記憶部
203 通信部
204 操作部
205 表示部
N 通信網
Claims (11)
- 蓄電デバイスの定電流充放電時におけるSOC−動作電圧特性のうち、SOCの変化量に対する動作電圧の変化量が他の領域よりも相対的に高い高変化量領域のSOC−動作電圧特性が反映された等価回路モデルを用いて、前記蓄電デバイスの挙動を推定する推定部と、
該推定部による推定結果を出力する出力部と
を備える開発支援装置。 - 前記等価回路モデルは、
前記蓄電デバイスの直流抵抗成分を模擬する抵抗器と、
第1時定数によって特徴付けられる過渡応答を示す前記蓄電デバイスの第1分極特性を模擬する第1RC並列回路と、
前記第1時定数よりも大きい第2時定数によって特徴付けられる過渡応答を示す前記蓄電デバイスの第2分極特性を模擬する第2RC並列回路と
を含み、
前記第2RC並列回路が備える抵抗素子および容量素子の各値を、前記高変化量領域のSOC−動作電圧特性に基づき設定してある
請求項1に記載の開発支援装置。 - 前記第1RC並列回路が備える抵抗素子および容量素子の各値を、SOCの変化量に対する動作電圧の変化量が他の領域よりも相対的に低い低変化量領域のSOC−動作電圧特性に基づき設定してある
請求項2に記載の開発支援装置。 - 前記第1RC並列回路および前記第2RC並列回路が備える各抵抗素子の値を、充電電圧−分極電圧特性に基づき設定してある
請求項2に記載の開発支援装置。 - 前記等価回路は、前記蓄電デバイスの充電状態に応じた起電力を計算する部分と、開放状態における理論起電力との差分を補正する部分とを含み、
前記推定部は、直前までの充放電バランスに基づき、前記等価回路を構成する素子の値を逐次補正し、前記蓄電デバイスの挙動を推定する
請求項1に記載の開発支援装置。 - 前記推定部は、直前までのSOCの最大値及び最小値の一方又は両方に基づき、前記値を逐次補正する
請求項5に記載の開発支援装置。 - 前記開放状態における理論起電力との差分を補正する部分は、RC並列回路により構成してある
請求項5又は請求項6に記載の開発支援装置。 - 前記推定部は、前記RC並列回路における抵抗素子の抵抗値を補正する
請求項7に記載の開発支援装置。 - コンピュータを用いて、
蓄電デバイスの定電流充放電時におけるSOC−動作電圧特性のうち、SOCの変化量に対する動作電圧の変化量が他の領域よりも相対的に高い高変化量領域のSOC−動作電圧特性が反映された等価回路モデルを用いて、前記蓄電デバイスの挙動を推定し、
前記蓄電デバイスの挙動の推定結果を出力する
開発支援方法。 - コンピュータを用いて、
蓄電デバイスの定電流充放電時におけるSOC−動作電圧特性のうち、SOCの変化量に対する動作電圧の変化量が他の領域よりも相対的に高い高変化量領域のSOC−動作電圧特性が反映された等価回路モデルを用いて、前記蓄電デバイスの実測値から電池状態を推定する
状態検知方法。 - 前記実測値として電流、電圧、温度の一部または全部を入力情報とし、前記等価回路モデルを用いて、前記実測値とモデル計算値とが一致するために必要な電池状態として最適なSOCおよびSOHの一方または両方を推定する
請求項10に記載の状態検知方法。
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JP2018141665A (ja) * | 2017-02-27 | 2018-09-13 | 学校法人立命館 | 電池管理方法、電池管理装置、及びコンピュータプログラム |
JP6893164B2 (ja) * | 2017-11-13 | 2021-06-23 | プライムアースEvエナジー株式会社 | 電池状態測定装置及び電池状態測定方法 |
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JP2005274280A (ja) * | 2004-03-24 | 2005-10-06 | Yuasa Corp | バッテリの状態検知方法 |
JP2010283922A (ja) * | 2009-06-02 | 2010-12-16 | Toyota Motor Corp | 車両の制御装置 |
JP2012247374A (ja) * | 2011-05-31 | 2012-12-13 | Primearth Ev Energy Co Ltd | 二次電池の制御装置 |
JP2017227653A (ja) * | 2013-01-21 | 2017-12-28 | 株式会社豊田自動織機 | 充電率推定装置および充電率推定方法 |
JP2017122622A (ja) * | 2016-01-06 | 2017-07-13 | 株式会社Gsユアサ | 状態推定装置、状態推定方法 |
JP2018009963A (ja) * | 2016-07-15 | 2018-01-18 | 日立化成株式会社 | シミュレーション方法及びシミュレーション装置 |
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