JP5496612B2 - 電池の充放電可能電流演算方法及び電源装置並びにこれを備える車両 - Google Patents
電池の充放電可能電流演算方法及び電源装置並びにこれを備える車両 Download PDFInfo
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Description
(電源装置100)
(電池の充放電可能電流演算方法)
(ステップS1 抵抗値算出)
(ステップS2 抵抗値分割)
(ステップS3 検出電圧Vnと設定電圧Vxとの比較)
(ステップS4−1 化学的抵抗値Rpの補正)
(ステップS4−2 化学的抵抗値Rpの補正)
(ステップS5 過去の充放電履歴に基づく電圧変動Vhの演算)
(ステップS6 補正後の物理的抵抗値Ro_now、化学的抵抗値Rp_nowの演算)
(ステップS7 開放電圧Voの推定)
(ステップS8 推定時間t2における使用可能電流I_targetの算出)
(I−Vプロットの直線性)
(充放電可能電流値)
10…残容量検出装置
11…メモリ
12…電圧検出部
14…温度検出部
16…電流検出部
17…温度センサ
18…演算部
19…通信処理部
20…電池ユニット
22…二次電池
30…接続機器通信端子
93…モータ
94…発電機
95…DC/ACインバータ
96…エンジン
EV、HV…車両
ED…接続機器
Claims (11)
- 電池の充放電において使用可能な最大電流値を、電池の電流、電圧、温度の少なくともいずれかに基づいて推定する充放電可能電流演算方法であって、
所定の時間における平均電流値(I1,I2)と平均電圧(V1,V2)に基づいて、抵抗値(R)を演算する工程と、
演算された抵抗値(R)を、物理的な抵抗値(Ro)と化学的な抵抗値(Rp)に分割する工程と、
過去から現在までのパルス放電又は充電時間(t1)に基づいて、化学的な抵抗値(Rp)を補正する工程と、
過去の充放電履歴による電圧変動(Vh)を求める工程と、
検出された電池温度及び電池の残容量(SOC)から、物理的な抵抗値(Ro)を補正する工程と、
各抵抗値(Ro,Rp)と電流(I)、電圧(V)、電圧変動(Vh)から、電池の開放電圧(Vo)を推定する工程と、
特定の時間(t2)における使用可能最大電流(I_target)を予測するため、複数の設定電流(Ia-Ix)における電池の開放電圧(Vo)を補正する工程と、
前記補正された物理的な抵抗値(Ro)、化学的な抵抗値(Rp)、電池の開放電圧(Vo)に基づいて、複数の設定電流(Ia-Ix)における、到達予測電圧(Va-Vx)を求める工程と、
前記設定電流(Ia-Ix)ならびに到達予測電圧(Va-Vx)に基づいて、電池の電流−電圧曲線を作成し、各温度における上下限電圧(Vmax,Vmin)における上下限電流(Imax,Imin)を求め、上限電流(Imax)を充電における使用可能最大電流(I_target)とし、下限電流(Imin)を放電における使用可能最大電流(I_target)とする工程と、
を含むことを特徴とする電池の充放電可能電流演算方法。 - 請求項1に記載の電池の充放電可能電流演算方法であって、さらに
特定の時間(t2)における使用可能最大電流(I_target)を予測するため、推定時間(t2)、又は現在までのパルス時間と推定時間の和(t1+t2)に基づいて化学的な抵抗値(Rp)を補正し、さらに複数の設定電流(Ia-Ix)における電池の残容量(SOCa-SOCn)及び電池の温度に基づいて、物理的な抵抗値(Ro)を補正する工程と、
を含むことを特徴とする電池の充放電可能電流演算方法。 - 請求項1又は2に記載の電池の充放電可能電流演算方法であって、
前記抵抗値(R)が、過去に求めた抵抗値(Rold)と現在求めた抵抗値(Rnow)の重み付け平均値であること特徴とする電池の充放電可能電流演算方法。 - 請求項1から3のいずれか一に記載の電池の充放電可能電流演算方法であって、
前記電圧変動(Vh)が、所定の回数の過去の充放電パルス時の時間補正された化学的な抵抗値(Rp)、電流(I)ならびに該充放電パルス終了後時間に依存する係数の積の総和となることを特徴とする電池の充放電可能電流演算方法。 - 請求項1から4のいずれか一に記載の電池の充放電可能電流演算方法であって、
前記下限電圧(Vmin)を、電池の電流−電圧曲線の直線性を維持可能な電圧に設定することを特徴とする電池の充放電可能電流演算方法。 - 請求項1から5のいずれか一に記載の電池の充放電可能電流演算方法であって、
前記下限電圧(Vmin)が、電池の電流−電圧曲線の直線性を維持できない低い電圧に設定されたとき、前記到達予測電圧(Va-Vx)を補正することを特徴とする電池の充放電可能電流演算方法。 - 請求項6に記載の電池の充放電可能電流演算方法であって、
前記到達予測電圧(Va-Vx)を補正するため、前記到達予測電圧(Va-Vx)と直線性を維持可能な下限電圧(Vmin)との差、比率に基づいて補正することを特徴とする電池の充放電可能電流演算方法。 - 請求項7に記載の電池の充放電可能電流演算方法であって、
前記下限電圧(Vmin)との差、比率に基づいて、電圧を補正し、又は化学的な抵抗値(Rp)、物理的な抵抗値(Ro)を補正し、再度到達予測電圧(Va~Vx)を求めることを特徴とする電池の充放電可能電流演算方法。 - 請求項1から8のいずれか一に記載の電池の充放電可能電流演算方法であって、
測定された電圧(V)が設定電圧(Vx)以下の場合、化学的な抵抗値(Rp)を補正することを特徴とする電池の充放電可能電流演算方法。 - 請求項1から9のいずれか一に記載の電池の充放電可能電流演算方法であって、
前記電池がリチウムイオン二次電池であることを特徴とする電池の充放電可能電流演算方法。 - 請求項1から10のいずれか一に記載の電池の充放電可能電流演算方法であって、さらに、
推定された充放電可能電流値を、情報処理系を持つ接続機器に送信する工程
を含むことを特徴とする電池の充放電可能電流演算方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009258442A JP5496612B2 (ja) | 2009-11-11 | 2009-11-11 | 電池の充放電可能電流演算方法及び電源装置並びにこれを備える車両 |
EP10014388.2A EP2323238A3 (en) | 2009-11-11 | 2010-11-08 | Available charging/discharging current calculation method and power supply device |
US12/942,254 US9071072B2 (en) | 2009-11-11 | 2010-11-09 | Available charging/discharging current calculation method and power supply device |
CN201010546228.2A CN102064571B (zh) | 2009-11-11 | 2010-11-10 | 电池的可充放电电流运算方法和电源装置以及配备该电源装置的车辆 |
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JP2009258442A JP5496612B2 (ja) | 2009-11-11 | 2009-11-11 | 電池の充放電可能電流演算方法及び電源装置並びにこれを備える車両 |
Publications (2)
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JP2011103748A JP2011103748A (ja) | 2011-05-26 |
JP5496612B2 true JP5496612B2 (ja) | 2014-05-21 |
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US9071072B2 (en) | 2015-06-30 |
US20110109273A1 (en) | 2011-05-12 |
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