JP2015153656A - 電池システム - Google Patents
電池システム Download PDFInfo
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- JP2015153656A JP2015153656A JP2014027562A JP2014027562A JP2015153656A JP 2015153656 A JP2015153656 A JP 2015153656A JP 2014027562 A JP2014027562 A JP 2014027562A JP 2014027562 A JP2014027562 A JP 2014027562A JP 2015153656 A JP2015153656 A JP 2015153656A
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
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- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
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- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
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- B60L2240/00—Control parameters of input or output; Target parameters
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
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- Electric Propulsion And Braking For Vehicles (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
好ましくは、電池容量補正部は、予め定められた水分浸入量と容量劣化量との関係に基づいて、水分浸入量推定部で推定された水分浸入量に対応する容量劣化量を求め、容量劣化量に基づいて電池容量推定部で推定された電池容量を補正する。
好ましくは、電池システムは、補正された電池容量が閾値以下の場合に、電池の入出力制限値を変更する制御部をさらに備える。
好ましくは、電池システムは、補正された電池容量が閾値以下の場合に、電池容量が少ない状態であることを表わす情報を通知する通知部をさらに備える。
以下、この発明の実施の形態について図面を参照して詳しく説明する。なお、図中同一
符号は同一または相当部分を示し、説明は繰返さない。
図1は、この発明の実施の形態1に従う電池システムが搭載された車両の構成を説明するブロック図である。
SMRと、充放電部19と、エンジンENGと、制御装置15とを備える。
二次電池を含む。電池200は、直流電圧をPCU20へ供給するとともに、PCU20
からの直流電圧によって充電される。
される。センサ出力17には、アクセルペダルに配置された位置センサによって検出され
るアクセル踏込み量に応じたアクセル開度や、車輪速度センサ出力等が含まれる。制御装置15は、入力されたこれらのセンサ出力に基づき、ハイブリッド車両に関する種々の制
御を統括的に行なう。
機械的に連結される。そして、ハイブリッド車両の走行状況に応じて、動力分割機構を介
して上記3者の間で駆動力の配分および結合が行なわれ、その結果として駆動輪が駆動さ
れる。
るが、モータジェネレータMG1が、主として発電機として動作し、モータジェネレータMG2が、主として電動機として動作する。
として用いられる。このとき、モータジェネレータMG1は、電池200からの電力の供
給を受けて電動機として駆動し、クランク軸を回転させエンジンを始動する。
を介して伝達されたエンジンの駆動力によって回転されて発電する。
MG1の発電した電力の少なくともいずれか一方によって駆動される。モータジェネレータMG2の駆動力は、差動ギヤ等を介して駆動軸に伝達される。これにより、モータジェネレータMG2は、エンジンをアシストして車両を走行させたり、自己の駆動力のみによ
って車両を走行させたりする。
動されて発電機として動作する。このとき、モータジェネレータMG2により発電された
回生電力は、PCU20を介して電池200に充電される。
らの制御指示に従って、電池200からの直流電圧を昇圧するとともに、その昇圧した直
流電圧を交流電圧に変換して、動力出力装置30に含まれるモータジェネレータMG1,
MG2を駆動制御する。
15からの制御指示に従って、モータジェネレータMG1,MG2の発電した交流電圧を
直流電圧に変換して電池200を充電する。
ちのPCU20を制御する部分とによって、モータジェネレータMG1,MG2を駆動制
御する電源装置が構成される。
G1,MG2にそれぞれ対応するモータ駆動装置131,132と、コンバータ/インバータ制御部140とを含む。この実施の形態では、交流モータであるモータジェネレータ
MG1,MG2が駆動制御されるので、モータ駆動装置131,132はインバータで構
成される。以下では、モータ駆動装置131,132をインバータ131,132と称する。
したモータジェネレータMG1,MG2への要求トルクを決定する。さらに、制御装置1
5は、モータジェネレータMG1,MG2の動作状態に応じて、最適なモータ動作電圧を
算出する。
らの直流電圧VBとに基づいて、モータ動作電圧Vmの電圧指令値VmrおよびモータジェネレータMG1,MG2でのトルク指令値Trefを生成する。電圧指令値Vmrおよびトルク指令値Trefは、コンバータ/インバータ制御部140へ与えられる。
て、コンバータ110の動作を制御するコンバータ制御信号Scnvを生成する。また、
コンバータ/インバータ制御部140は、制御装置15からのトルク指令値Trefに従
って、インバータ131,132の動作をそれぞれ制御するインバータ制御信号Spwm
1,Spwm2を生成する。
電池容量推定部52は、 電池200の使用履歴に関する情報に基づいて、電池容量を推定する。
電池容量補正部54は、水分浸入量推定部53で推定された水分浸入量に基づいて、電池容量推定部52で推定された電池容量を補正する。
ステップS101において、電池容量推定部52は、電池情報記憶部51内の電池の使用履歴に関する情報に基づいて、電池容量Cを推定する。より、具体的には、電池容量推定部52は、以下の式に従って、電池容量Cを推定する。
C=C0×y …(2)
ただし、aは、電池200の使用条件によって定まる劣化係数、tuは電池200の使用累積時間、yは容量維持率、C0は電池200の初期容量である。
ただし、Σは、TBを変化させて総和をとることを意味する。
ステップS103において、電池容量補正部54は、水分浸入量推定部53で推定された水分浸入量IW(t)に基づいて、電池容量推定部52で推定された電池容量Cを補正する。より、具体的には、電池容量補正部54は、図7に示すような予め定められた水分浸入量IWと容量劣化量Dとの関係に基づいて、水分浸入量推定部53で推定された水分浸入量IWに対応する容量劣化量Dを求める。図7の例では、水分浸入量IWと傾きk(定数)との乗算値が容量劣化量Dであることが定められている。電池容量補正部54は、電池容量推定部52で推定された電池容量Cから容量劣化量Dを減算することによって、補正された電池容量E(E=C−D)を算出する。
図8は、実施の形態2の制御装置(ECU)115の構成を表わす図である。
通知部155は、補正された電池容量が閾値以下の場合に、電池容量が小さい状態であることを表わす情報を表示装置156に表示する。
図9のフローチャートが、図2のフローチャートと相違する点は、ステップS105およびステップS106に代えて、ステップS205およびステップS206を備える点である。
Claims (6)
- 電池と、
前記電池の使用履歴に関する情報に基づいて、電池容量を推定する電池容量推定部と、
前記電池内への水分浸入量を推定する水分浸入量推定部と、
前記推定された水分浸入量に基づいて、前記推定された電池容量を補正する電池容量補正部とを備えた、電池システム。 - 前記水分浸入量推定部は、前記電池の温度履歴に基づいて、前記電池内への水分浸入量を推定する、請求項1記載の電池システム。
- 前記水分浸入量推定部は、前記電池の使用履歴に関する情報に基づいて、前記電池が使用された各温度に対する、前記電池内に浸入する水分の浸入速度と前記電池の使用時間を求め、
前記水分浸入量推定部は、前記水分の浸入速度と前記電池の使用時間との積を、前記電池が使用されたすべての温度について算出し、前記算出した積の総和を前記水分浸入量として推定する、請求項2記載の電池システム。 - 前記電池容量補正部は、予め定められた水分浸入量と容量劣化量との関係に基づいて、前記水分浸入量推定部で推定された水分浸入量に対応する容量劣化量を求め、前記容量劣化量に基づいて前記電池容量推定部で推定された電池容量を補正する、請求項1記載の電池システム。
- 前記補正された電池容量が閾値以下の場合に、前記電池の入出力制限値を変更する制御部をさらに備えた、請求項1記載の電池システム。
- 前記補正された電池容量が閾値以下の場合に、前記電池容量が少ない状態であることを表わす情報を通知する通知部をさらに備えた、請求項1記載の電池システム。
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