JP5026287B2 - ハイブリッド電気自動車用バッテリーの最大出力推定方法 - Google Patents
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Description
本発明は、ハイブリッド電気自動車(HEV)用バッテリーの最大出力を推定する方法に関するものであって、より詳しくは、車両に搭載されるバッテリーの最大出力に影響を及ぼす様々な環境変数による最大出力を正確に推定してバッテリーの利用率を向上させ、またバッテリーの過充電及び過放電を防止するようにするハイブリッド電気自動車用バッテリーの最大出力推定方法に関する。
電気自動車は駆動燃料として一般に2次電池のリチウム‐イオン電池を用いており、上記電池から出力される電源により動力発生装置を駆動させ、これを動力伝達装置を通じて駆動ホイールに伝達して駆動ホイールを回転させることで、自動車を駆動させる。
本発明は、前述した従来技術の問題点を解決する。
Powermax= F(SOC, temp, accumulated discharge Ah)
= F(SOC, temp) × F(accumulated discharge Ah)
F(SOC, temp) = F(temp)5 × SOC5 + F(temp)4 × SOC4 + F(temp)3 × SOC3 + F(temp)2 × SOC2 + F(temp)1 × SOC + F(temp)0,
上記式において、F(temp) = D2 × temp2 + D1 × temp1 + D0(D0 〜 D2は、定数)
F(accumulated discharge Ah) = C5k5 + C4k4 + C3k3 + C2k2 + C1k + C0(C5〜C0は、定数)(kは、[0,300000]の範囲にあり、関数に入力値として入力される場合、[−1,1]の範囲の値に変わって入力される)
Powermax = {F(temp)5 × SOC5 + F(temp)4 × SOC4 + F(temp)3 × SOC3 + F(temp)2 × SOC2 + F(temp)1 × SOC + F(temp)0} × (C5k5 + C4k4 + C3k3 + C2k2 + C1k + C0)
以下、添付図面を参照して本発明の好適な実施形態を説明する。以下の本発明の説明においては、本発明の対象を不明確にしないとき、組み込まれる公知の機能及び構成に対する詳細な説明は省略する。
[数1]
Powermax = F(SOC, temp, accumulated discharge Ah)
= F(SOC, temp) × F(accumulated discharge Ah)
[数2]
F(SOC, temp) = F(temp)5 × SOC5 + F(temp)4 × SOC4 + F(temp)3 × SOC3 + F(temp)2 × SOC2 + F(temp)1 × SOC1 + F(temp)0
[数3]
F(temp) = D2 × temp2 + D1 × temp1 + D0(D0 〜 D2は、定数)
[数4]
F(accumulated discharge Ah) = C5k5 + C4k4 + C3k3 + C2k2 + C1k + C0 (C5 〜 C0は、定数)
F(accumulated discharge Ah) = −16.3986k5 + 15.0026k4 + 13.307k3 − 8.38698k2 − 7.96289k + 82.3028
[数5]
Powermax = { F(temp)5 × SOC5 + F(temp)4 × SOC4 + F(temp)3 × SOC3 + F(temp)2 × SOC2 + F(temp)1 × SOC + F(temp)0} × C5k5 + C4k4 + C3k3 + C2k2 + C1k + C0
本発明者らは本発明のバッテリー出力推定方法の正確性を検証するための実験を行い、図5及び図6に示したような結果を得た。
上記のように、本発明によると、ハイブリッド電気自動車に装着されるバッテリーの出力に影響を及ぼすSOC、温度、自動車の走行の際にバッテリーの容量が放電されることによる出力の退化率を全て考慮して、バッテリーの出力を予め正確に推定することで、バッテリーの利用率を向上させバッテリーの過充電及び過放電を防止することができる。
Claims (4)
- ハイブリッド電気自動車用バッテリーの最大出力推定方法であって、
上記自動車が運行できる複数のバッテリー充電状態(SOC)及び複数の温度(temp)に応じたバッテリーの最大出力を抽出してその相関関係を算出する段階と、
上記自動車の走行の際にバッテリーの累積放電容量(accumulated discharge Ah)に応じたバッテリーの最大出力の退化率を抽出して両者の相関関係を算出する段階と、
上記それぞれの段階を通じて得られる相関関係に基づいて、バッテリーの最大出力(Powermax)を次の関数を通じて推定する段階とを含むことを特徴とするハイブリッド電気自動車用バッテリーの最大出力推定方法。
Powermax = F(SOC, temp, accumulated discharge Ah)
= F(SOC, temp) × F(accumulated discharge Ah)
上記式において、F(SOC, temp)は複数のバッテリー充電状態(SOC)及び複数の温度(temp)に応じたバッテリーの最大出力を抽出して算出された相関関係に基づいた関数であり、F(accumulated discharge Ah)はバッテリーの累積放電容量(accumulated discharge Ah)に応じたバッテリーの最大出力の退化率を抽出して算出された相関関係に基づいた関数であって、F(accumulated discharge Ah) = C5k5 + C4k4 + C3k3 + C2k2 + C1k + C0で表され、上記式において、C5 〜 C0は定数であり、kは、 [0,300000]の範囲にあるバッテリーの累積放電容量が[−1,1]の範囲の値に変わった値である。 - 上記関数においてF(SOC, temp)は、次の関係式を通じて計算されることを特徴とする請求項1に記載のハイブリッド電気自動車用バッテリーの最大出力推定方法。
F(SOC, temp) = F(temp)5 × SOC5 + F(temp)4 × SOC4 + F(temp)3 × SOC3 + F(temp)2 × SOC2 + F(temp)1 × SOC + F(temp)0,
上記式において、F(temp)0、F(temp)1、F(temp)2、F(temp)3、F(temp)4及びF(temp)5は、温度に関する関数であって、各々のF(temp)は下記のような式で表される。
F(temp)= D2 × temp2 + D1 × temp1 + D0(D0〜D2は定数) - 上記バッテリーの放電容量に応じた出力の退化率は、次の式により表されることを特徴とする請求項1または請求項2に記載のハイブリッド電気自動車用バッテリーの最大出力推定方法。
F(accumulated discharge Ah) = − 16.3986k5 + 15.0026k4 + 13.307k3 − 8.38698k2 − 7.96289k + 82.3028 - 上記推定された最大出力値をバッテリー管理システム(BMS)を介して上記ハイブリッド電気自動車の車両制御装置に伝達してバッテリーの充放電出力を制御する段階をさらに含むことを特徴とする請求項3に記載のハイブリッド電気自動車用バッテリーの最大出力推定方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050018037A KR100863888B1 (ko) | 2005-03-04 | 2005-03-04 | 하이브리드 전기 자동차용 배터리의 최대 출력 추정 방법 |
KR10-2005-0018037 | 2005-03-04 | ||
PCT/KR2006/000731 WO2006107140A1 (en) | 2005-03-04 | 2006-03-03 | Method of estimating available power for hev battery pack |
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WO2009067810A1 (en) * | 2007-11-30 | 2009-06-04 | Advanced Lithium Power Inc. | Apparatus, method and memory for improving the performance and charging of hybrid electric vehicles |
JP2013502687A (ja) * | 2009-08-21 | 2013-01-24 | マヒンドラ レバ エレクトリック ビークルズ プライベート リミテッド | エネルギ貯蔵システムの予備エネルギの算定及び使用 |
JP5201190B2 (ja) | 2010-10-08 | 2013-06-05 | 三菱自動車工業株式会社 | ハイブリット車のクラッチ制御装置 |
JP5736821B2 (ja) * | 2011-02-15 | 2015-06-17 | トヨタ自動車株式会社 | ハイブリッド自動車 |
JP5696547B2 (ja) * | 2011-03-22 | 2015-04-08 | トヨタ自動車株式会社 | 二次電池の制御装置 |
KR101329915B1 (ko) * | 2011-10-28 | 2013-11-14 | 현대오트론 주식회사 | 하이브리드 전기 자동차용 배터리의 주행 중 최대 출력파워 예측 방법 및 장치 |
CN104685367B (zh) * | 2012-11-29 | 2017-09-08 | 株式会社Lg化学 | 用于估计包括混合正极材料的二次电池的功率的设备和方法 |
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KR20060096820A (ko) | 2006-09-13 |
EP1861891B1 (en) | 2014-08-13 |
TWI336968B (en) | 2011-02-01 |
CN101133514A (zh) | 2008-02-27 |
US20060206276A1 (en) | 2006-09-14 |
EP1861891A4 (en) | 2011-11-23 |
JP2008532472A (ja) | 2008-08-14 |
EP1861891A1 (en) | 2007-12-05 |
WO2006107140A1 (en) | 2006-10-12 |
CN101133514B (zh) | 2010-07-21 |
US7518375B2 (en) | 2009-04-14 |
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KR100863888B1 (ko) | 2008-10-15 |
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