JP2004320877A - Power device for drive unit and automobile equipped with the same, and control method of power device - Google Patents

Power device for drive unit and automobile equipped with the same, and control method of power device Download PDF

Info

Publication number
JP2004320877A
JP2004320877A JP2003110451A JP2003110451A JP2004320877A JP 2004320877 A JP2004320877 A JP 2004320877A JP 2003110451 A JP2003110451 A JP 2003110451A JP 2003110451 A JP2003110451 A JP 2003110451A JP 2004320877 A JP2004320877 A JP 2004320877A
Authority
JP
Japan
Prior art keywords
power
voltage
auxiliary
low
output voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003110451A
Other languages
Japanese (ja)
Inventor
Koichiro Muta
浩一郎 牟田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2003110451A priority Critical patent/JP2004320877A/en
Publication of JP2004320877A publication Critical patent/JP2004320877A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

<P>PROBLEM TO BE SOLVED: To feed power that corresponds to the power consumption of an auxiliary machine to an auxiliary machine system, and to suppress the overcharge and the overdischarge of a capacitor device of the auxiliary machine system. <P>SOLUTION: When a low-voltage battery of the auxiliary machine system is in a favorable state and the power consumption Ph of the auxiliary machine is small, an output voltage Vout of a DC-DC converter that feeds power to the auxiliary machine system from a high-voltage power system through voltage conversion is set to be a low voltage VLow (step S140), and when the low-voltage battery of the auxiliary machine system is not in the favorable state and the power consumption Ph of the auxiliary machine is large, the output voltage Vout of the DC-DC converter is set to be a high voltage VHi (step S150). As a result, the power corresponding to the power consumption Ph of the auxiliary machine can be fed to the auxiliary machine system, and power corresponding to the state of the low-voltage battery can be fed to the auxiliary machine system, thus suppressing the overcharge and the overdischarge of the low-voltage battery. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、駆動装置用の電力装置およびこれを備える自動車並びに電力装置の制御方法に関する。
【０００２】
【従来の技術】
従来、この種の駆動装置用の電力装置としては、車両の走行用の駆動力を得る主バッテリから補機に電力を供給する補機バッテリにＤＣ／ＤＣコンバータにより直流電力を供給する際に補機バッテリの温度に基づいて補機バッテリの充電電圧を可変とするものが提案されている（例えば、特許文献１参照）。この装置では、補機バッテリの温度変化に対して充電電圧を可変とすることにより、補機バッテリの過充電や充電不足を解消しようとしている。
【０００３】
【特許文献１】
特開平７−１０７６１９号公報（図３）
【０００４】
【発明が解決しようとする課題】
しかしながら、こうした電力装置では、補機バッテリの温度変化に対応することができるものの、補機の消費電力の変化に対応することができない場合がある。例えば、補機バッテリの温度変化がないときにはその温度に応じた充電電圧に固定されるから、補機の消費電力が少ないときには補機バッテリが過充電される場合が生じる。
【０００５】
本発明の駆動装置用の電力装置および電力装置の制御方法は、補機の消費電力に応じた電力が補機系に供給されるようにすることを目的の一つとする。また、本発明の駆動装置用の電力装置および電力装置の制御方法は、補機系の蓄電装置などの過充電や過放電を抑止することを目的の一つとする。
【０００６】
【課題を解決するための手段およびその作用・効果】
本発明の駆動装置用の電力装置およびこれを備える自動車並びに電力装置の制御方法は、上述の目的の少なくとも一部を達成するために以下の手段を採った。
【０００７】
本発明の駆動装置用の電力装置は、
駆動装置に用いられる電力装置であって、
充放電が可能で装置の駆動用の電力を供給可能な高圧系の駆動用蓄電手段と、
充放電が可能で装置を含むシステムの補機類に電力を供給可能な低圧系の補機用蓄電手段と、
前記高圧系の電力を低圧に変換して前記低圧系に供給する電圧変換供給手段と、
前記補機類の消費電力を推定する補機電力推定手段と、
該推定された補機類の消費電力に基づいて前記電圧変換供給手段における前記低圧系への出力電圧を制御する出力電圧制御手段と、
を備えることを要旨とする。
【０００８】
この本発明の駆動装置用の電力装置では、補機類の消費電力を推定し、この推定した補機類の消費電力に基づいて駆動用の電力を供給する駆動用蓄電手段を含む高圧系の電力を低圧に変換して補機類に電力を供給する補機用蓄電手段を含む低圧系に供給する際の低圧系への出力電圧を制御する。したがって、補機類の消費電力に応じた電力を低圧系に供給することができる。ここで、「電力変換供給手段」としては、例えば直流−直流コンバータなどを用いることができる。また、「補機電力推定手段」としては、補機類に電力を供給する低圧系に電流計と電圧計とを取り付けて電流と電圧とを検出して演算により消費電力を推定するものや各補機の駆動状態に基づいて消費電力を推定するものなどを挙げることができる。
【０００９】
こうした本発明の駆動装置用の電力装置において、前記出力電圧制御手段は、前記推定された補機類の消費電力の大小に対応して前記出力電圧が大小するよう前記電圧変換供給手段を制御する手段であるものとすることもできる。この場合、前記出力電圧制御手段は、前記推定された補機類の消費電力が所定電力以上のときには前記出力電圧が第１の電圧となるよう前記電圧変換供給手段を制御し、前記推定された補機類の消費電力が前記所定電力未満のときには前記出力電圧が前記第１の電圧より低い第２の電圧となるよう前記電圧変換供給手段を制御する手段であるものとすることもできる。こうすれば、簡易な制御で補機類の消費電力に応じた電力を低圧系に供給することができる。
【００１０】
また、本発明の駆動装置用の電力装置において、前記補機用蓄電手段の状態を検出する状態検出手段を備え、前記出力電圧制御手段は前記状態検出手段により検出された補機用蓄電手段の状態に基づいて前記電圧変換供給手段における前記低圧系の出力電圧を制御する手段であるものとすることもできる。こうすれば、補機用蓄電手段の状態に応じた電力を低圧系に供給することができる。この結果、補機用蓄電手段の過充電や過放電を抑止することができる。
【００１１】
この補機用蓄電手段の状態に基づいて低圧系への出力電圧を制御する態様の本発明の駆動装置用の電力装置において、前記出力電圧制御手段は、前記検出された補機用蓄電手段の状態の良否に対応して前記電圧変換供給手段における前記低圧系の出力電圧が小大するよう該電圧変換供給手段を制御する手段であるものとすることもできる。この場合、前記出力電圧制御手段は、前記検出された補機用蓄電手段の状態が良好でないときには前記出力電圧が第１の電圧となるよう前記電圧変換供給手段を制御し、前記検出された補機用蓄電手段の状態が良好なときには前記出力電圧が前記第１の電圧より低い第２の電圧となるよう前記電圧変換供給手段を制御する手段であるものとすることもできる。こうすれば、補機用蓄電手段の状態の良否に応じた電力を低圧系に供給することができる。この結果、補機用蓄電手段の過充電や過放電を抑止することができる。
【００１２】
また、補機用蓄電手段の状態に基づいて低圧系への出力電圧を制御する態様の本発明の駆動装置用の電力装置において、前記状態検出手段は前記補機用蓄電手段の温度を検出する手段であり、前記出力電圧制御手段は前記検出された補機用蓄電手段の温度の高低に対応して前記出力電圧が小大するよう前記電圧変換供給手段を制御する手段であるものとすることもできる。こうすれば、補機用蓄電手段の温度に応じた電力を低圧系に供給することができ、補機用蓄電手段の過充電や過放電を抑止することができる。
【００１３】
さらに、補機用蓄電手段の状態に基づいて低圧系への出力電圧を制御する態様の本発明の駆動装置用の電力装置において、前記状態検出手段は前記補機用蓄電手段の端子間電圧を検出する手段であり、前記出力電圧制御手段は前記検出された補機用蓄電手段の端子間電圧の大小に対応して前記出力電圧が小大するよう前記電圧変換供給手段を制御する手段であるものとすることもできる。こうすれば、補機用蓄電手段の端子間電圧に応じた電力を低圧系に供給することができ、補機用蓄電手段の過充電や過放電を抑止することができる。
【００１４】
あるいは、補機用蓄電手段の状態に基づいて低圧系への出力電圧を制御する態様の本発明の駆動装置用の電力装置において、前記状態検出手段は前記補機用蓄電手段の蓄電残量を検出する手段であり、前記出力電圧制御手段は前記検出された補機用蓄電手段の蓄電残量の大小に対応して前記出力電圧が小大するよう前記電圧変換供給手段を制御する手段であるものとすることもできる。こうすれば、補機用蓄電手段の蓄電残量に応じた電力を低圧系に供給することができ、補機用蓄電手段の過充電や過放電を抑止することができる。
【００１５】
本発明の駆動装置用の電力装置において、前記駆動装置は燃料の消費を伴って発電する発電手段を備え、前記駆動用蓄電手段は前記発電手段の発電電力を用いて充電される手段であるものとすることもできる。ここで、発電手段としては、内燃機関とこの内燃機関の出力軸に機械的に接続された発電機とから構成されるものや、燃料電池などを挙げることができる。
【００１６】
本発明の自動車は、上述のいずれかの態様の本発明の駆動装置用の電力装置、即ち、基本的には、駆動装置に用いられる電力装置であって、充放電が可能で装置の駆動用の電力を供給可能な高圧系の駆動用蓄電手段と、充放電が可能で装置を含むシステムの補機類に電力を供給可能な低圧系の補機用蓄電手段と、前記高圧系の電力を低圧に変換して前記低圧系に供給する電圧変換供給手段と、前記補機類の消費電力を推定する補機電力推定手段と、該推定された補機類の消費電力に基づいて前記電圧変換供給手段における前記低圧系への出力電圧を制御する出力電圧制御手段と、を備える駆動装置用の電力装置を搭載し、前記駆動装置からの駆動力を用いて走行することを要旨とする。
【００１７】
この本発明の自動車では、上述のいずれかの態様の本発明の駆動装置用の電力装置を搭載するから、本発明の駆動装置用の電力装置が奏する効果、例えば、補機類の消費電力に応じた電力を低圧系に供給することができる効果や補機用蓄電手段の状態に応じた電力を低圧系に供給することができる効果などと同様な効果を奏することができる。
【００１８】
本発明の電力装置の制御方法は、
充放電が可能で駆動装置の駆動用の電力を供給可能な高圧系の駆動用蓄電手段と、充放電が可能で前記駆動装置を含むシステムの補機類に電力を供給可能な低圧系の補機用蓄電手段と、前記高圧系の電力を低圧に変換して前記低圧系に供給する電圧変換供給手段と、を備える電力装置の制御方法であって、
（ａ）前記補機類の消費電力を推定し、
（ｂ）該推定された補機類の消費電力の大小に対応して前記電圧変換供給手段における前記低圧系への出力電圧が大小するよう該電圧変換供給手段を制御する
ことを要旨とする。
【００１９】
この本発明の電力装置の制御方法によれば、補機類の消費電力を推定し、この推定した補機類の消費電力の大小に対応して駆動用の電力を供給する駆動用蓄電手段を含む高圧系の電力を低圧に変換して補機類に電力を供給する補機用蓄電手段を含む低圧系に供給する際の低圧系への出力電圧が大小するよう電圧変換供給手段を制御するから、補機類の消費電力に応じた電力を低圧系に供給することができる。
【００２０】
こうした本発明の電力装置の制御方法において、前記ステップ（ｂ）の前に前記補機用蓄電手段の状態を検出するステップを備え、前記ステップ（ｂ）は前記検出された補機用蓄電手段の状態の良否に対応して前記電圧変換供給手段における前記低圧系の出力電圧が小大するよう該電圧変換供給手段を制御するものとすることもできる。こうすれば、補機用蓄電手段の状態に応じた電力を低圧系に供給することができる。この結果、補機用蓄電手段の過充電や過放電を抑止することができる。
【００２１】
【発明の実施の形態】
次に、本発明の実施の形態を実施例を用いて説明する。図１は、本発明の一実施例である電力装置４０を搭載したハイブリッド自動車２０の構成の概略を示す構成図である。実施例のハイブリッド自動車２０は、図示するように、ガソリンにより駆動するエンジン２２と、このエンジン２２のクランクシャフトに接続された遊星歯車機構３０と、遊星歯車機構３０に動力を入出力する発電可能なモータＭＧ１と、遊星歯車機構３０とデファレンシャルギヤ３８を介して駆動輪３９ａ，３９ｂに接続された駆動軸に動力を入出力する発電可能なモータＭＧ２と、インバータ３２，３４を介してモータＭＧ１，ＭＧ２と電力のやりとりを行なう高圧バッテリ４２と、車両に搭載された複数の補機６０ａ，６０ｂに電力を供給可能な低圧バッテリ５０と、高圧バッテリ４２が接続された高圧系の電力ラインと低圧バッテリ５０が接続された低圧系の電力ラインとに接続され高圧系の電力を低圧に変換して低圧系に供給するＤＣ／ＤＣコンバータ５８と、主としてＤＣ／ＤＣコンバータ５８を制御する電子制御ユニット７０とを備える。実施例のハイブリッド自動車２０は、図示しないが、エンジン２２の運転を制御するエンジン用電子制御ユニットやモータＭＧ１，ＭＧ２を駆動制御するモータ用電子制御ユニット，車両全体をコントロールするハイブリッド用電子制御ユニットなども備えるが、本発明の中核をなさないため、その図示および説明は省略する。
【００２２】
電子制御ユニット７０は、ＣＰＵ７２を中心とするマイクロプロセッサとして構成されており、ＣＰＵ７２の他に処理プログラムを記憶するＲＯＭ７４と、データを一時的に記憶するＲＡＭ７６と、図示しない入出力ポートおよび通信ポートとを備える。電子制御ユニット７０には、低圧バッテリ５０の出力端子に取り付けられた電圧センサ５２および電圧センサ５４からの低圧バッテリ５０の端子間電圧Ｖｂおよび充放電電流Ｉｂ，低圧バッテリ５０に取り付けられた温度センサ５６からの低圧バッテリ５０の温度Ｔｂ，補機６０ａ，６０ｂに電力を供給する電力ラインに取り付けられた電圧センサ６２および電流センサ６４からの供給電圧Ｖｈおよび供給電流Ｉｈ，ＤＣ／ＤＣコンバータ５８内に取り付けられた図示しない電圧センサや電流センサからの電圧や電流などが入力ポートを介して入力されている。また、電子制御ユニット７０からは、ＤＣ／ＤＣコンバータ５８へのスイッチング制御信号などが出力ポートを介して出力されている。また、電子制御ユニット７０は、前述したハイブリッド用電子制御ユニットなどと通信ポートを介して接続されており、各種制御信号やデータのやりとりを行なっている。
【００２３】
こうして構成された実施例のハイブリッド自動車２０では、電力装置４０としては図１に一点鎖線で示す範囲、即ち、高圧バッテリ４２と低圧バッテリ５０とＤＣ／ＤＣコンバータ５８と電子制御ユニット７０とセンサ群５２〜５６，６２，６４によって構成されている。なお、駆動装置としては、エンジン２２や遊星歯車機構３０，モータＭＧ１，モータＭＧ２などによって構成されており、エンジン２２からの動力や高圧バッテリ４２からの電力により走行用の駆動力を得ている。
【００２４】
次に、実施例の電力装置４０における動作、特にＤＣ／ＤＣコンバータ５８の出力電圧を設定する動作について説明する。図２は、電子制御ユニット７０により実行される電圧制御ルーチンの一例を示すフローチャートである。このルーチンは、所定時間毎（例えば、２０ｍｓｅｃ毎）に繰り返し実行される。
【００２５】
この電圧制御ルーチンが実行されると、実施例の電子制御ユニット７０のＣＰＵ７２は、まず、低圧バッテリ５０の状態を反映する要素として温度センサ５６からの低圧バッテリ５０の温度Ｔｂや電圧センサ５２からの低圧バッテリ５０の端子間電圧Ｖｂ，低圧バッテリ５０の残容量（ＳＯＣ）などを入力する（ステップＳ１００）。ここで、低圧バッテリ５０の残容量（ＳＯＣ）の入力は、実施例では、電子制御ユニット７０により実行される図示しない残容量計算ルーチンにより充放電電流Ｉｂを積算することに基づいて計算されＲＡＭ７６の所定領域に記憶された残容量（ＳＯＣ）を読み込むことにより行なわれる。
【００２６】
そして、入力した低圧バッテリ５０の状態を反映する要素により低圧バッテリ５０の状態が良好であるか否かを判定する（ステップＳ１１０）。この処理では、例えば、低圧バッテリ５０の温度Ｔｂが所定温度（例えば０℃や５℃，１０℃など）より高いか否かによる低圧バッテリ５０の良否の判定や、低圧バッテリ５０の端子間電圧Ｖｂが所定電圧（例えば、低圧バッテリ５０の定格電圧より若干低い電圧など）より高いか否かによる低圧バッテリ５０の良否の判定、残容量（ＳＯＣ）が所定値（例えば８０％や８５％，９０％など）より高いか否かによる低圧バッテリ５０の良否の判定などにより行なうことができる。この場合、温度Ｔｂが所定温度より高いときや端子間電圧Ｖｂが所定電圧より高いとき，残容量（ＳＯＣ）が所定値より高いときが低圧バッテリ５０が良好な状態に相当する。
【００２７】
低圧バッテリ５０が良好な状態であると判定されると、補機６０ａ，６０ｂにより消費される補機消費電力Ｐｈを入力する（ステップＳ１２０）。ここで、補機消費電力Ｐｈの入力は、実施例では、電圧センサ６２からの供給電圧Ｖｈと電流センサ６４からの供給電流Ｉｈとを入力すると共に入力した供給電圧Ｖｈと供給電流Ｉｈとの積を計算することにより行なうことができる。
【００２８】
そして、補機消費電力Ｐｈを閾値Ｐｒｅｆと比較する（ステップＳ１３０）。ここで、閾値Ｐｒｅｆは、低圧系への電力供給の増減を判定するものとして設定されており、補機６０ａ，６０ｂの各々の最大消費電力の和の５０％や６０％などのように補機６０ａ，６０ｂの各々の最大消費電力や低圧バッテリ５０の容量などにより定めることができる。
【００２９】
補機消費電力Ｐｈが閾値Ｐｒｅｆ未満のときには、補機６０ａ，６０ｂの消費電力は少ないと判断し、ＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを低めの低電圧ＶＬｏｗに設定して（ステップＳ１４０）、本ルーチンを終了する。ここで、低電圧ＶＬｏｗとしては、例えば低圧バッテリ５０の定格電圧より若干低い電圧などを用いることができる。こうしてＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを設定すると、電子制御ユニット７０は、ＤＣ／ＤＣコンバータ５８からの出力電圧Ｖｏｕｔが低電圧ＶＬｏｗとなるようＤＣ／ＤＣコンバータ５８のスイッチング素子のスイッチングを制御する。このように低圧系が低電圧ＶＬｏｗとされても、低圧バッテリ５０は良好な状態であり、補機６０ａ，６０ｂの消費電力は少ないから、補機６０ａ，６０ｂへの電力供給は十分に行なうことができる。しかも、低圧系を低電圧ＶＬｏｗとすることにより、低圧バッテリ５０の過充電を抑止することができる。なお、低圧バッテリ５０の残容量（ＳＯＣ）が低くなって低圧バッテリ５０が良好な状態ではないものとなったり、補機６０ａ，６０ｂの消費電力が多くなったときには、繰り返し実行される本ルーチンのステップＳ１１０やＳ１３０の処理により、次に説明するようにＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔに高電圧ＶＨｉが設定されるから、低圧バッテリ５０が過放電されるのを抑止することができる。
【００３０】
ステップＳ１１０で低圧バッテリ５０が良好な状態ではないと判断されたり、ステップＳ１３０で補機消費電力Ｐｈが閾値Ｐｒｅｆ以上と判定されて補機６０ａ，６０ｂの消費電力は少なくないと判断されたときには、ＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを高めの高電圧ＶＨｉに設定して（ステップＳ１５０）、本ルーチンを終了する。ここで、高電圧ＶＨｉとしては、例えば低圧バッテリ５０の定格電圧やそれより若干高い電圧などを用いることができる。このようにＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを高電圧ＶＨｉとすることにより、低圧バッテリ５０を充電して良好な状態としたり、補機６０ａ，６０ｂの消費電力に見合う電力を供給することができる。なお、充電により低圧バッテリ５０が良好な状態となったり、補機６０ａ，６０ｂの消費電力が少なくなったときには、繰り返し実行される本ルーチンによりＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔは低電圧ＶＬｏｗに設定されるから、低圧バッテリ５０が過充電されるのを抑止することができる。
【００３１】
以上説明した実施例の電力装置４０によれば、補機消費電力Ｐｈが少ないときにはＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔに低電圧ＶＬｏｗを設定し、補機消費電力Ｐｈが多いときにはＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔに高電圧ＶＨｉを設定するから、補機消費電力Ｐｈに応じた電力を低圧系に供給することができる。しかも、低圧バッテリ５０の状態の良否に応じてＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを低電圧ＶＬｏｗや高電圧ＶＨｉに切り替えるから、低圧バッテリ５０の状態に応じた電力を低圧系に供給することができる。この結果、低圧バッテリ５０の過充電や過放電を抑止することができる。
【００３２】
実施例の電力装置４０では、補機消費電力Ｐｈや低圧バッテリ５０の状態の良否に応じてＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを低電圧ＶＬｏｗと高電圧ＶＨｉの２段に切り替えるものとしたが、補機消費電力Ｐｈや低圧バッテリ５０の状態の良否に応じて３段以上にＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを切り替えるものとしてもよい。
【００３３】
実施例の電力装置４０では、補機消費電力Ｐｈや低圧バッテリ５０の状態の良否に応じてＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを切り替えるものとしたが、低圧バッテリ５０の状態の良否に拘わらず、補機消費電力Ｐｈに応じてＤＣ／ＤＣコンバータ５８の出力電圧Ｖｏｕｔを切り替えるものとしてもよい。
【００３４】
実施例の電力装置４０では、低圧バッテリ５０の温度Ｔｂや端子間電圧Ｖｂ，残容量（ＳＯＣ）により低圧バッテリ５０の状態の良否を判定するものとしたが、温度Ｔｂや端子間電圧Ｖｂ，残容量（ＳＯＣ）のいずれか一つだけにより低圧バッテリ５０の状態の良否を判定したり、温度Ｔｂや端子間電圧Ｖｂ，残容量（ＳＯＣ）のいずれか二つにより低圧バッテリ５０の状態の良否を判定したり、温度Ｔｂや端子間電圧Ｖｂ，残容量（ＳＯＣ）以外の要素を用いて低圧バッテリ５０の状態の良否を判定するものとしてもよい。
【００３５】
実施例の電力装置４０では、エンジン２２や遊星歯車機構３０，モータＭＧ１，モータＭＧ２などによって構成された駆動装置の電力装置として適用したが、燃料の消費を伴って発電して高圧バッテリ４２を充電可能であれば如何なる駆動装置の電力装置にも適用することができる。例えば、エンジンとこのエンジンのクランクシャフトに直接接続されて発電する発電機と走行用のモータとを備える駆動装置やエンジンとこのエンジンのクランクシャフトに接続されたロータおよび駆動軸に接続されたロータを有する対回転子電動機と走行用のモータとを備える駆動装置、燃料電池と走行用のモータとを備える駆動装置など、種々の駆動装置の電力装置として適用することができる。
【００３６】
また、実施例の電力装置４０では、ハイブリッド自動車２０に搭載するものとしたが、ハイブリッド自動車２０以外の自動車や列車などの車両に搭載するものとしてもよく、車両以外の船舶や航空機などの移動体に搭載するものとしてもよく、建設機械などの移動しない機器に搭載するものとしてもよい。
【００３７】
以上、本発明の実施の形態について実施例を用いて説明したが、本発明はこうした実施例に何等限定されるものではなく、本発明の要旨を逸脱しない範囲内において、種々なる形態で実施し得ることは勿論である。
【図面の簡単な説明】
【図１】本発明の一実施例である電力装置４０を搭載したハイブリッド自動車２０の構成の概略を示す構成図である。
【図２】実施例の電子制御ユニット７０により実行される電圧制御ルーチンの一例を示すフローチャートである。
【符号の説明】
２０ ハイブリッド自動車、２２ エンジン、３０ 遊星歯車機構、３２，３４ インバータ、３８ デファレンシャルギヤ、３９ａ，３９ｂ 駆動輪、４０電力装置、４２ 高圧バッテリ、５０ 低圧バッテリ、５２ 電圧センサ、５４ 電圧センサ、５６ 温度センサ、５８ ＤＣ／ＤＣコンバータ、６０ａ，６０ｂ 補機、６２ 電圧センサ、６４ 電流センサ、７０ 電子制御ユニット、７２ ＣＰＵ、７４ ＲＯＭ、７６ ＲＡＭ、ＭＧ１，ＭＧ２ モータ。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power device for a drive device, an automobile including the same, and a control method of the power device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a power device for a drive device of this type has been used when a DC / DC converter supplies DC power to an auxiliary battery that supplies power to an auxiliary device from a main battery that obtains driving force for driving the vehicle. There has been proposed a device in which the charging voltage of an auxiliary battery is made variable based on the temperature of the auxiliary battery (for example, see Patent Document 1). This device attempts to eliminate overcharging and insufficient charging of the auxiliary battery by making the charging voltage variable with respect to the temperature change of the auxiliary battery.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 7-107719 (FIG. 3)
[0004]
[Problems to be solved by the invention]
However, although such a power device can cope with a change in the temperature of the auxiliary battery, it may not be able to cope with a change in the power consumption of the auxiliary device. For example, when there is no change in the temperature of the auxiliary battery, the charging voltage is fixed to the temperature according to the temperature. Therefore, when the power consumption of the auxiliary machine is small, the auxiliary battery may be overcharged.
[0005]
An object of the power device for a drive device and the control method of the power device of the present invention is to supply power corresponding to power consumption of an auxiliary device to an auxiliary device system. Another object of the present invention is to suppress overcharging and overdischarging of an auxiliary power storage device and the like in a power device for a driving device and a control method of the power device according to the present invention.
[0006]
[Means for Solving the Problems and Their Functions and Effects]
In order to achieve at least a part of the above-described object, a power device for a drive device, a vehicle including the power device, and a control method of the power device according to the present invention employ the following means.
[0007]
The power device for a drive device of the present invention is:
A power device used for a driving device,
A high-voltage drive power storage means capable of charging and discharging and supplying power for driving the device,
Low-voltage auxiliary power storage means capable of supplying power to auxiliary equipment of a system including a device that can be charged and discharged,
Voltage conversion supply means for converting the power of the high voltage system to a low voltage and supplying the low voltage system with the low voltage;
Auxiliary equipment power estimation means for estimating power consumption of the auxiliary equipment,
Output voltage control means for controlling an output voltage to the low-voltage system in the voltage conversion supply means based on the estimated power consumption of the accessories,
The gist is to provide
[0008]
In the power device for a driving device according to the present invention, the power consumption of the auxiliary devices is estimated, and the high-voltage system including the driving power storage means for supplying the driving power based on the estimated power consumption of the auxiliary devices is provided. An output voltage to the low-voltage system when the power is converted to a low voltage and supplied to a low-voltage system including an auxiliary power storage unit that supplies the auxiliary equipment with power is controlled. Therefore, power according to the power consumption of the auxiliary equipment can be supplied to the low-voltage system. Here, as the “power conversion supply unit”, for example, a DC-DC converter can be used. The “auxiliary equipment power estimating means” includes an ammeter and a voltmeter attached to a low-voltage system that supplies power to auxiliary equipment, and detects current and voltage, and estimates power consumption by calculation. One that estimates the power consumption based on the driving state of the auxiliary machine can be used.
[0009]
In such a power device for a driving device of the present invention, the output voltage control means controls the voltage conversion supply means so that the output voltage increases or decreases in accordance with the estimated power consumption of the auxiliary equipment. It can also be a means. In this case, the output voltage control means controls the voltage conversion supply means so that the output voltage becomes the first voltage when the estimated power consumption of the auxiliary devices is equal to or more than a predetermined power, and When the power consumption of the accessories is less than the predetermined power, the power conversion control means may be a means for controlling the voltage conversion supply means so that the output voltage becomes a second voltage lower than the first voltage. This makes it possible to supply power corresponding to the power consumption of the auxiliary devices to the low-voltage system with simple control.
[0010]
Further, in the power device for a driving device of the present invention, the power storage device for the auxiliary device further includes a state detection unit that detects a state of the storage unit for the auxiliary device, wherein the output voltage control unit includes It may be a means for controlling an output voltage of the low voltage system in the voltage conversion supply means based on a state. With this configuration, it is possible to supply power to the low-voltage system according to the state of the auxiliary device power storage unit. As a result, overcharging and overdischarging of the auxiliary power storage means can be suppressed.
[0011]
In the power device for a driving device according to the aspect of the present invention, wherein the output voltage to the low-voltage system is controlled based on the state of the auxiliary device power storage device, the output voltage control device includes It may be a means for controlling the voltage conversion supply means so that the output voltage of the low voltage system in the voltage conversion supply means is increased or decreased in accordance with the state of the state. In this case, the output voltage control means controls the voltage conversion supply means so that the output voltage becomes the first voltage when the state of the detected auxiliary power storage means is not good, and When the state of the electric power storage means is good, the means for controlling the voltage conversion supply means may be such that the output voltage becomes a second voltage lower than the first voltage. With this configuration, it is possible to supply power to the low-voltage system according to the state of the condition of the auxiliary device power storage means. As a result, overcharging and overdischarging of the auxiliary power storage means can be suppressed.
[0012]
Further, in the power device for a driving device according to the aspect of the present invention, wherein the output voltage to the low-voltage system is controlled based on a state of the auxiliary device power storage device, the state detection device detects a temperature of the auxiliary device power storage device. Means, wherein the output voltage control means is means for controlling the voltage conversion supply means so as to increase or decrease the output voltage in accordance with the detected temperature of the auxiliary power storage means. You can also. This makes it possible to supply electric power corresponding to the temperature of the auxiliary device power storage means to the low-voltage system, thereby suppressing overcharge and overdischarge of the auxiliary device power storage device.
[0013]
Further, in the power device for a driving device according to the aspect of the present invention, wherein the output voltage to the low-voltage system is controlled based on the state of the auxiliary equipment power storage means, the state detection means detects a voltage between terminals of the auxiliary power storage means. The output voltage control means is means for controlling the voltage conversion supply means so that the output voltage is increased or decreased in accordance with the detected magnitude of the terminal voltage of the auxiliary power storage means. It can also be. This makes it possible to supply power to the low-voltage system in accordance with the voltage between terminals of the auxiliary device power storage means, and to suppress overcharge and overdischarge of the auxiliary device power storage means.
[0014]
Alternatively, in the power device for a driving device according to the aspect of the present invention, wherein the output voltage to the low-voltage system is controlled based on a state of the auxiliary device power storage unit, the state detection unit detects a remaining power amount of the auxiliary device power storage unit. The output voltage control means is means for controlling the voltage conversion supply means so that the output voltage is increased or decreased in accordance with the detected remaining amount of power of the auxiliary power storage means. It can also be. This makes it possible to supply power to the low-voltage system in accordance with the remaining amount of power stored in the auxiliary device power storage means, thereby suppressing overcharge and overdischarge of the auxiliary device power storage means.
[0015]
In the power device for a driving device according to the present invention, the driving device includes a power generation unit that generates power with consumption of fuel, and the driving power storage unit is a unit that is charged using the power generated by the power generation unit. It can also be. Here, examples of the power generation unit include a unit including an internal combustion engine and a generator mechanically connected to an output shaft of the internal combustion engine, a fuel cell, and the like.
[0016]
The automobile of the present invention is a power device for the drive device of the present invention according to any one of the above-described embodiments, that is, a power device basically used for the drive device, which is capable of charging and discharging and driving the device. A high-voltage driving power storage means capable of supplying power, a low-voltage auxiliary power storage means capable of charging and discharging and supplying power to auxiliary equipment of a system including the device, and the high-voltage power. Voltage conversion supply means for converting the voltage to low voltage and supplying the low-voltage system to the low-voltage system; auxiliary power estimation means for estimating the power consumption of the auxiliary equipment; and the voltage conversion based on the estimated power consumption of the auxiliary equipment. A power device for a driving device including an output voltage control device for controlling an output voltage to the low-voltage system in the supply device is mounted, and the vehicle travels using driving force from the driving device.
[0017]
In the vehicle of the present invention, since the power device for the drive device of the present invention is mounted on any one of the above-described embodiments, the effects of the power device for the drive device of the present invention, for example, the power consumption of auxiliary equipment are reduced. The same effects as the effect of supplying the corresponding power to the low-voltage system and the effect of supplying the power corresponding to the state of the auxiliary power storage means to the low-voltage system can be obtained.
[0018]
The power device control method according to the present invention includes:
A high-voltage drive power storage means capable of charging / discharging and supplying power for driving the drive device, and a low-voltage system power supply means capable of charging / discharging and supplying power to auxiliary equipment of a system including the drive device. Power storage means, and a voltage conversion supply means for converting the power of the high voltage system to a low voltage and supplying it to the low voltage system,
(A) estimating the power consumption of the auxiliary equipment;
(B) The gist of the present invention is to control the voltage conversion / supply unit so that the output voltage to the low-voltage system in the voltage conversion / supply unit increases or decreases according to the estimated power consumption of the auxiliary devices.
[0019]
According to the power device control method of the present invention, the power storage means for estimating the power consumption of the auxiliary equipment and supplying the driving power corresponding to the estimated power consumption of the auxiliary equipment is provided. The voltage conversion / supply means is controlled so that the output voltage to the low-voltage system when supplying to the low-voltage system including the auxiliary power storage means for converting the power of the high-voltage system including the low-voltage power to the low-voltage and supplying power to the auxiliary equipment is increased or decreased. Therefore, power corresponding to the power consumption of the accessories can be supplied to the low-voltage system.
[0020]
In the control method of the power device according to the present invention, a step of detecting a state of the auxiliary equipment power storage means is provided before the step (b), and the step (b) is performed by the detected auxiliary power storage means. The voltage conversion / supply unit may be controlled so that the output voltage of the low-voltage system in the voltage conversion / supply unit increases or decreases according to the state of the state. With this configuration, it is possible to supply power to the low-voltage system according to the state of the auxiliary device power storage unit. As a result, overcharging and overdischarging of the auxiliary power storage means can be suppressed.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described using examples. FIG. 1 is a configuration diagram schematically showing the configuration of a hybrid vehicle 20 equipped with a power device 40 according to one embodiment of the present invention. As shown in the figure, the hybrid vehicle 20 according to the embodiment has an engine 22 driven by gasoline, a planetary gear mechanism 30 connected to a crankshaft of the engine 22, and a power generator that inputs and outputs power to and from the planetary gear mechanism 30. A motor MG1, a motor MG2 capable of generating and outputting power to and from a drive shaft connected to drive wheels 39a and 39b via a planetary gear mechanism 30 and a differential gear 38, and motors MG1 and MG2 via inverters 32 and 34 High-voltage battery 42 that exchanges power with low-voltage battery 50, a low-voltage battery 50 that can supply power to a plurality of accessories 60a and 60b mounted on the vehicle, a high-voltage power line to which high-voltage battery 42 is connected, and a low-voltage battery 50. Is connected to the low-voltage power line connected to the low-voltage system and converts the high-voltage power to low-voltage and supplies it to the low-voltage system It includes a C / DC converter 58, and an electronic control unit 70 that mainly controls the DC / DC converter 58. Although not shown, the hybrid vehicle 20 of the embodiment includes an engine electronic control unit that controls the operation of the engine 22, an electronic control unit for a motor that drives and controls the motors MG1 and MG2, an electronic control unit for a hybrid that controls the entire vehicle, and the like. However, since they do not form the core of the present invention, their illustration and description are omitted.
[0022]
The electronic control unit 70 is configured as a microprocessor having a CPU 72 as a main component. In addition to the CPU 72, a ROM 74 for storing a processing program, a RAM 76 for temporarily storing data, an input / output port and a communication port (not shown) Is provided. The electronic control unit 70 includes a voltage sensor 52 attached to the output terminal of the low-voltage battery 50 and a terminal-to-terminal voltage Vb and a charge / discharge current Ib of the low-voltage battery 50 from the voltage sensor 54, and a temperature sensor 56 attached to the low-voltage battery 50. The temperature Tb of the low-voltage battery 50, the supply voltage Vh and the supply current Ih from the voltage sensor 62 and the current sensor 64 attached to the power line that supplies electric power to the auxiliary devices 60a and 60b, and the DC / DC converter 58 A voltage or current from a voltage sensor or a current sensor (not shown) is input via an input port. The electronic control unit 70 outputs a switching control signal to the DC / DC converter 58 through an output port. The electronic control unit 70 is connected to the above-described electronic control unit for a hybrid via a communication port, and exchanges various control signals and data.
[0023]
In the hybrid vehicle 20 of the embodiment configured as described above, the power device 40 has a range indicated by a chain line in FIG. 1, that is, a high-voltage battery 42, a low-voltage battery 50, a DC / DC converter 58, an electronic control unit 70, and a sensor group 52. 56, 62, and 64. The driving device includes the engine 22, the planetary gear mechanism 30, the motor MG 1, the motor MG 2, and the like, and obtains a driving force for traveling by power from the engine 22 and electric power from the high-voltage battery 42.
[0024]
Next, an operation of the power device 40 of the embodiment, particularly an operation of setting the output voltage of the DC / DC converter 58 will be described. FIG. 2 is a flowchart illustrating an example of a voltage control routine executed by the electronic control unit 70. This routine is repeatedly executed every predetermined time (for example, every 20 msec).
[0025]
When this voltage control routine is executed, the CPU 72 of the electronic control unit 70 according to the embodiment first determines the temperature Tb of the low-voltage battery 50 from the temperature sensor 56 and the temperature Tb from the voltage sensor 52 as elements reflecting the state of the low-voltage battery 50. The terminal voltage Vb of the low-voltage battery 50, the remaining capacity (SOC) of the low-voltage battery 50, and the like are input (step S100). Here, the input of the remaining capacity (SOC) of the low-voltage battery 50 is calculated based on the integration of the charge / discharge current Ib by a remaining capacity calculation routine (not shown) executed by the electronic control unit 70 in the embodiment, and is input to the RAM 76. This is performed by reading the remaining capacity (SOC) stored in the predetermined area.
[0026]
Then, it is determined whether or not the state of the low-voltage battery 50 is good based on the element reflecting the input state of the low-voltage battery 50 (step S110). In this process, for example, whether the low-voltage battery 50 is good or not is determined based on whether the temperature Tb of the low-voltage battery 50 is higher than a predetermined temperature (for example, 0 ° C., 5 ° C., 10 ° C., etc.), and the terminal voltage Vb Of the low-voltage battery 50 based on whether the voltage is higher than a predetermined voltage (for example, a voltage slightly lower than the rated voltage of the low-voltage battery 50), and the remaining capacity (SOC) is determined to be a predetermined value (for example, 80%, 85%, 90%). Etc.) by determining whether the low-voltage battery 50 is good or not based on whether it is higher or not. In this case, when the temperature Tb is higher than the predetermined temperature, when the terminal voltage Vb is higher than the predetermined voltage, and when the remaining capacity (SOC) is higher than the predetermined value, the low-voltage battery 50 corresponds to a good state.
[0027]
When it is determined that the low-voltage battery 50 is in a good state, the auxiliary device power consumption Ph consumed by the auxiliary devices 60a and 60b is input (step S120). In this embodiment, the input of the auxiliary power consumption Ph is, in the embodiment, a supply voltage Vh from the voltage sensor 62 and a supply current Ih from the current sensor 64 and a product of the input supply voltage Vh and the supply current Ih. Is calculated.
[0028]
Then, the auxiliary power consumption Ph is compared with the threshold value Pref (step S130). Here, the threshold value Pref is set to determine whether the power supply to the low-voltage system is increased or decreased, and the auxiliary equipment 60a, 60b, such as 50% or 60% of the sum of the maximum power consumption of each of the auxiliary equipment 60a, 60b. It can be determined by the maximum power consumption of each of 60a and 60b, the capacity of low-voltage battery 50, and the like.
[0029]
When the auxiliary device power consumption Ph is less than the threshold value Pref, it is determined that the power consumption of the auxiliary devices 60a and 60b is small, and the output voltage Vout of the DC / DC converter 58 is set to a lower low voltage VLow (step S140). This routine ends. Here, as the low voltage VLow, for example, a voltage slightly lower than the rated voltage of the low-voltage battery 50 can be used. When the output voltage Vout of the DC / DC converter 58 is set in this manner, the electronic control unit 70 controls the switching of the switching element of the DC / DC converter 58 so that the output voltage Vout from the DC / DC converter 58 becomes the low voltage VLow. . Even if the low-voltage system is set to the low voltage VLow, the low-voltage battery 50 is in a good state and the power consumption of the auxiliary devices 60a and 60b is small. Therefore, it is necessary to sufficiently supply power to the auxiliary devices 60a and 60b. Can be. In addition, by setting the low-voltage system to the low voltage VLow, overcharging of the low-voltage battery 50 can be suppressed. When the remaining capacity (SOC) of the low-voltage battery 50 becomes low and the low-voltage battery 50 is not in a good state, or when the power consumption of the auxiliary devices 60a and 60b increases, the routine of this routine that is repeatedly executed is executed. By the processing of steps S110 and S130, the high voltage VHi is set to the output voltage Vout of the DC / DC converter 58 as described below, so that the low-voltage battery 50 can be prevented from being over-discharged.
[0030]
If it is determined in step S110 that the low-voltage battery 50 is not in a good state, or if it is determined in step S130 that the auxiliary device power consumption Ph is equal to or greater than the threshold Pref and the power consumption of the auxiliary devices 60a and 60b is not low, The output voltage Vout of the DC / DC converter 58 is set to a higher high voltage VHi (step S150), and this routine ends. Here, as the high voltage VHi, for example, the rated voltage of the low-voltage battery 50 or a voltage slightly higher than the rated voltage can be used. By setting the output voltage Vout of the DC / DC converter 58 to the high voltage VHi in this manner, the low-voltage battery 50 can be charged to be in a good state, and power corresponding to the power consumption of the auxiliary devices 60a and 60b can be supplied. it can. When the low-voltage battery 50 is brought into a good state by charging or the power consumption of the auxiliary devices 60a and 60b is reduced, the output voltage Vout of the DC / DC converter 58 is reduced to the low voltage VLow by this routine that is repeatedly executed. Since the setting is made, overcharging of the low-voltage battery 50 can be suppressed.
[0031]
According to the power device 40 of the embodiment described above, the low voltage VLow is set to the output voltage Vout of the DC / DC converter 58 when the auxiliary power consumption Ph is low, and the DC / DC converter is used when the auxiliary power consumption Ph is high. Since the high voltage VHi is set to the output voltage Vout at 58, it is possible to supply power corresponding to the auxiliary machine power consumption Ph to the low voltage system. In addition, since the output voltage Vout of the DC / DC converter 58 is switched to the low voltage VLow or the high voltage VHi according to the state of the low-voltage battery 50, power corresponding to the state of the low-voltage battery 50 can be supplied to the low-voltage system. it can. As a result, overcharging and overdischarging of the low-voltage battery 50 can be suppressed.
[0032]
In the power device 40 of the embodiment, the output voltage Vout of the DC / DC converter 58 is switched to two stages of the low voltage VLow and the high voltage VHi according to the auxiliary power consumption Ph and the state of the low-voltage battery 50. Alternatively, the output voltage Vout of the DC / DC converter 58 may be switched to three or more stages in accordance with the auxiliary power consumption Ph and the state of the low-voltage battery 50.
[0033]
In the power device 40 of the embodiment, the output voltage Vout of the DC / DC converter 58 is switched according to the auxiliary power consumption Ph and the state of the low-voltage battery 50, but regardless of the state of the low-voltage battery 50. Alternatively, the output voltage Vout of the DC / DC converter 58 may be switched according to the auxiliary power consumption Ph.
[0034]
In the power device 40 of the embodiment, the quality of the low-voltage battery 50 is determined based on the temperature Tb of the low-voltage battery 50, the inter-terminal voltage Vb, and the remaining capacity (SOC). The state of the low-voltage battery 50 is determined based on only one of the capacities (SOC), and the state of the low-voltage battery 50 is determined based on any two of the temperature Tb, the terminal voltage Vb, and the remaining capacity (SOC). The determination may be made or the state of the low-voltage battery 50 may be determined using factors other than the temperature Tb, the terminal voltage Vb, and the remaining capacity (SOC).
[0035]
In the power device 40 of the embodiment, the power device is applied as a power device of a driving device including the engine 22, the planetary gear mechanism 30, the motor MG1, the motor MG2, and the like. If possible, the present invention can be applied to a power device of any driving device. For example, a drive device including an engine, a generator connected directly to a crankshaft of the engine, and a generator for running, and a motor connected to the engine, a rotor connected to a crankshaft of the engine, and a rotor connected to a drive shaft. The present invention can be applied as a power device of various drive devices, such as a drive device including a rotor motor and a travel motor, and a drive device including a fuel cell and a travel motor.
[0036]
Further, in the power device 40 of the embodiment, the power device 40 is mounted on the hybrid vehicle 20. However, the power device 40 may be mounted on a vehicle such as an automobile or a train other than the hybrid vehicle 20, or may be mounted on a vehicle other than the vehicle such as a ship or an aircraft. It may be mounted on a non-moving device such as a construction machine.
[0037]
As described above, the embodiments of the present invention have been described using the examples. However, the present invention is not limited to these examples, and may be implemented in various forms without departing from the gist of the present invention. Obviously you can get it.
[Brief description of the drawings]
FIG. 1 is a configuration diagram schematically showing a configuration of a hybrid vehicle 20 equipped with a power device 40 according to one embodiment of the present invention.
FIG. 2 is a flowchart illustrating an example of a voltage control routine executed by an electronic control unit 70 according to the embodiment.
[Explanation of symbols]
Reference Signs List 20 hybrid vehicle, 22 engine, 30 planetary gear mechanism, 32, 34 inverter, 38 differential gear, 39a, 39b drive wheel, 40 power device, 42 high voltage battery, 50 low voltage battery, 52 voltage sensor, 54 voltage sensor, 56 temperature sensor , 58 DC / DC converter, 60a, 60b accessories, 62 voltage sensor, 64 current sensor, 70 electronic control unit, 72 CPU, 74 ROM, 76 RAM, MG1, MG2 motor.

Claims (14)

駆動装置に用いられる電力装置であって、
充放電が可能で装置の駆動用の電力を供給可能な高圧系の駆動用蓄電手段と、
充放電が可能で装置を含むシステムの補機類に電力を供給可能な低圧系の補機用蓄電手段と、
前記高圧系の電力を低圧に変換して前記低圧系に供給する電圧変換供給手段と、
前記補機類の消費電力を推定する補機電力推定手段と、
該推定された補機類の消費電力に基づいて前記電圧変換供給手段における前記低圧系への出力電圧を制御する出力電圧制御手段と、
を備える駆動装置用の電力装置。A power device used for a driving device,
A high-voltage drive power storage means capable of charging and discharging and supplying power for driving the device,
Low-voltage auxiliary power storage means capable of supplying power to auxiliary equipment of a system including a device that can be charged and discharged,
Voltage conversion supply means for converting the power of the high voltage system to a low voltage and supplying the low voltage system with the low voltage;
Auxiliary equipment power estimation means for estimating power consumption of the auxiliary equipment,
Output voltage control means for controlling an output voltage to the low-voltage system in the voltage conversion supply means based on the estimated power consumption of the accessories,
A power device for a drive device comprising: 前記出力電圧制御手段は、前記推定された補機類の消費電力の大小に対応して前記出力電圧が大小するよう前記電圧変換供給手段を制御する手段である請求項１記載の駆動装置用の電力装置。2. The drive device according to claim 1, wherein the output voltage control unit is a unit that controls the voltage conversion supply unit so that the output voltage increases or decreases according to the estimated power consumption of the auxiliary devices. 3. Power equipment. 前記出力電圧制御手段は、前記推定された補機類の消費電力が所定電力以上のときには前記出力電圧が第１の電圧となるよう前記電圧変換供給手段を制御し、前記推定された補機類の消費電力が前記所定電力未満のときには前記出力電圧が前記第１の電圧より低い第２の電圧となるよう前記電圧変換供給手段を制御する手段である請求項２記載の駆動装置用の電力装置。The output voltage control means controls the voltage conversion supply means so that the output voltage becomes the first voltage when the estimated power consumption of the auxiliary equipment is equal to or more than a predetermined power, and 3. The power device for a driving device according to claim 2, wherein the power conversion device controls the voltage conversion supply unit such that the output voltage becomes a second voltage lower than the first voltage when the power consumption of the power supply is less than the predetermined power. . 請求項１ないし３いずれか記載の駆動装置用の電力装置であって、
前記補機用蓄電手段の状態を検出する状態検出手段を備え、
前記出力電圧制御手段は、前記状態検出手段により検出された補機用蓄電手段の状態に基づいて前記電圧変換供給手段における前記低圧系の出力電圧を制御する手段である
駆動装置用の電力装置。A power device for a driving device according to any one of claims 1 to 3,
State detecting means for detecting a state of the auxiliary equipment power storage means,
The power device for a drive device, wherein the output voltage control means is means for controlling an output voltage of the low voltage system in the voltage conversion supply means based on a state of the auxiliary power storage means detected by the state detection means. 前記出力電圧制御手段は、前記検出された補機用蓄電手段の状態の良否に対応して前記電圧変換供給手段における前記低圧系の出力電圧が小大するよう該電圧変換供給手段を制御する手段である請求項４記載の駆動装置用の電力装置。The output voltage control means controls the voltage conversion supply means such that the output voltage of the low voltage system in the voltage conversion supply means is increased or decreased in accordance with the detected state of the auxiliary equipment power storage means. The power device for a driving device according to claim 4, wherein 前記出力電圧制御手段は、前記検出された補機用蓄電手段の状態が良好でないときには前記出力電圧が第１の電圧となるよう前記電圧変換供給手段を制御し、前記検出された補機用蓄電手段の状態が良好なときには前記出力電圧が前記第１の電圧より低い第２の電圧となるよう前記電圧変換供給手段を制御する手段である請求項５記載の駆動装置用の電力装置。The output voltage control means controls the voltage conversion supply means so that the output voltage becomes the first voltage when the state of the detected auxiliary power storage means is not good, and the detected auxiliary power storage means 6. The power device for a driving device according to claim 5, wherein the power conversion means controls the voltage conversion supply means so that the output voltage becomes a second voltage lower than the first voltage when the state of the means is good. 請求項４ないし６いずれか記載の駆動装置用の電力装置であって、
前記状態検出手段は、前記補機用蓄電手段の温度を検出する手段であり、
前記出力電圧制御手段は、前記検出された補機用蓄電手段の温度の高低に対応して前記出力電圧が小大するよう前記電圧変換供給手段を制御する手段である
駆動装置用の電力装置。A power device for a driving device according to any one of claims 4 to 6, wherein
The state detection means is means for detecting the temperature of the auxiliary power storage means,
The power device for a driving device, wherein the output voltage control means is means for controlling the voltage conversion supply means so as to increase or decrease the output voltage in accordance with the detected temperature of the auxiliary power storage means. 請求項４ないし７いずれか記載の駆動装置用の電力装置であって、
前記状態検出手段は、前記補機用蓄電手段の端子間電圧を検出する手段であり、
前記出力電圧制御手段は、前記検出された補機用蓄電手段の端子間電圧の大小に対応して前記出力電圧が小大するよう前記電圧変換供給手段を制御する手段である
駆動装置用の電力装置。A power device for a driving device according to any one of claims 4 to 7,
The state detection means is means for detecting a voltage between terminals of the auxiliary power storage means,
The output voltage control means is means for controlling the voltage conversion supply means so as to increase or decrease the output voltage in accordance with the detected voltage between terminals of the auxiliary power storage means. apparatus. 請求項４ないし８いずれか記載の駆動装置用の電力装置であって、
前記状態検出手段は、前記補機用蓄電手段の蓄電残量を検出する手段であり、
前記出力電圧制御手段は、前記検出された補機用蓄電手段の蓄電残量の大小に対応して前記出力電圧が小大するよう前記電圧変換供給手段を制御する手段である
駆動装置用の電力装置。A power device for a driving device according to any one of claims 4 to 8,
The state detection unit is a unit that detects a remaining power amount of the auxiliary device power storage unit,
The output voltage control means is means for controlling the voltage conversion supply means so as to increase or decrease the output voltage in accordance with the detected amount of remaining charge of the auxiliary power storage means. apparatus. 請求項１ないし９いずれか記載の駆動装置用の電力装置であって、
前記駆動装置は、燃料の消費を伴って発電する発電手段を備え、
前記駆動用蓄電手段は、前記発電手段の発電電力を用いて充電される手段である
駆動装置用の電力装置。A power device for a driving device according to any one of claims 1 to 9,
The drive device includes a power generation unit that generates power with consumption of fuel,
The power device for a driving device, wherein the driving power storage unit is a unit that is charged by using power generated by the power generation unit. 前記電力変換供給手段は、直流−直流コンバータである請求項１ないし１０いずれか記載の駆動装置用の電力装置。The power device for a driving device according to claim 1, wherein the power conversion supply unit is a DC-DC converter. 請求項１ないし１１いずれか記載の駆動装置用の電力装置を搭載し、前記駆動装置からの駆動力を用いて走行する自動車。An automobile equipped with the power device for a driving device according to any one of claims 1 to 11, and traveling using driving force from the driving device. 充放電が可能で駆動装置の駆動用の電力を供給可能な高圧系の駆動用蓄電手段と、充放電が可能で前記駆動装置を含むシステムの補機類に電力を供給可能な低圧系の補機用蓄電手段と、前記高圧系の電力を低圧に変換して前記低圧系に供給する電圧変換供給手段と、を備える電力装置の制御方法であって、
（ａ）前記補機類の消費電力を推定し、
（ｂ）該推定された補機類の消費電力の大小に対応して前記電圧変換供給手段における前記低圧系への出力電圧が大小するよう該電圧変換供給手段を制御する
電力装置の制御方法。A high-voltage drive power storage means capable of charging / discharging and supplying power for driving the drive device, and a low-voltage system power supply means capable of charging / discharging and supplying power to auxiliary equipment of a system including the drive device. Power storage means, and a voltage conversion supply means for converting the power of the high voltage system to a low voltage and supplying it to the low voltage system,
(A) estimating the power consumption of the auxiliary equipment;
(B) A control method of a power device for controlling the voltage conversion supply means so that the output voltage to the low voltage system in the voltage conversion supply means is increased or decreased in accordance with the estimated power consumption of the auxiliary equipment. 請求項１３記載の電力装置の制御方法であって、
前記ステップ（ｂ）の前に、前記補機用蓄電手段の状態を検出するステップを備え、
前記ステップ（ｂ）は、前記検出された補機用蓄電手段の状態の良否に対応して前記電圧変換供給手段における前記低圧系の出力電圧が小大するよう該電圧変換供給手段を制御する
電力装置の制御方法。It is a control method of the electric power device of Claim 13, Comprising:
Before the step (b), a step of detecting a state of the auxiliary power storage means;
The step (b) includes controlling power to control the voltage conversion / supply unit so that the output voltage of the low-voltage system in the voltage conversion / supply unit increases or decreases according to the detected state of the auxiliary device power storage unit. How to control the device.
JP2003110451A 2003-04-15 2003-04-15 Power device for drive unit and automobile equipped with the same, and control method of power device Pending JP2004320877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003110451A JP2004320877A (en) 2003-04-15 2003-04-15 Power device for drive unit and automobile equipped with the same, and control method of power device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003110451A JP2004320877A (en) 2003-04-15 2003-04-15 Power device for drive unit and automobile equipped with the same, and control method of power device

Publications (1)

Publication Number Publication Date
JP2004320877A true JP2004320877A (en) 2004-11-11

Family

ID=33471307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003110451A Pending JP2004320877A (en) 2003-04-15 2003-04-15 Power device for drive unit and automobile equipped with the same, and control method of power device

Country Status (1)

Country Link
JP (1) JP2004320877A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230102A (en) * 2005-02-17 2006-08-31 Toyota Motor Corp Power supply device, automobile equipped therewith, and control method thereof
WO2007057757A1 (en) * 2005-11-21 2007-05-24 Toyota Jidosha Kabushiki Kaisha Power supply controller
JP2007159248A (en) * 2005-12-02 2007-06-21 Panasonic Ev Energy Co Ltd Controller for secondary battery and input control method of secondary battery
JP2007159247A (en) * 2005-12-02 2007-06-21 Panasonic Ev Energy Co Ltd Controller for secondary battery and method for controlling output of secondary battery
WO2007138801A1 (en) * 2006-05-25 2007-12-06 Toyota Jidosha Kabushiki Kaisha Variable valve-actuating device, control method for the device, and vehicle carrying the device
JP2008154397A (en) * 2006-12-19 2008-07-03 Nissan Motor Co Ltd Power controller
JP2008245402A (en) * 2007-03-27 2008-10-09 Nissan Motor Co Ltd Supply voltage controller
WO2008149964A1 (en) * 2007-06-06 2008-12-11 Toyota Jidosha Kabushiki Kaisha Power supply unit of vehicle
JP2010172135A (en) * 2009-01-23 2010-08-05 Nissan Motor Co Ltd Charging controller for vehicle and charging control method for vehicle
JP2010226776A (en) * 2009-03-19 2010-10-07 Nissan Motor Co Ltd Device and method for controlling power supply circuit
JP2011031870A (en) * 2009-07-30 2011-02-17 Kia Motors Corp Variable voltage control method for hybrid car
JP2011230670A (en) * 2010-04-28 2011-11-17 Honda Motor Co Ltd Electric vehicle
JP2012111267A (en) * 2010-11-19 2012-06-14 Mitsubishi Heavy Ind Ltd Vehicle and its engine starting method
WO2012127659A1 (en) * 2011-03-23 2012-09-27 株式会社ユニバンス Electric automobile, and electric power source device for electric automobile
JP2014045633A (en) * 2012-08-29 2014-03-13 Nissan Motor Co Ltd Controller for dc-dc converter
CN104092365A (en) * 2010-12-29 2014-10-08 上海汽车集团股份有限公司 Enabling control method of direct-current high-voltage and low-voltage converter and voltage outputting control method
JP2015061442A (en) * 2013-09-19 2015-03-30 株式会社オートネットワーク技術研究所 Transformer device
JP2015077042A (en) * 2013-10-11 2015-04-20 富士重工業株式会社 Electric vehicle
JP2017030509A (en) * 2015-07-31 2017-02-09 トヨタ自動車株式会社 Power supply control apparatus
JP2017100638A (en) * 2015-12-04 2017-06-08 いすゞ自動車株式会社 Hybrid vehicle and control method therefor
CN112706614A (en) * 2020-12-21 2021-04-27 北京百度网讯科技有限公司 Power supply control apparatus for vehicle and vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05244704A (en) * 1992-02-26 1993-09-21 Honda Motor Co Ltd Auxiliary power supply for motor vehicle
JPH07107619A (en) * 1993-09-29 1995-04-21 Nippondenso Co Ltd Auxiliary battery charger for electric automobile
JPH07111735A (en) * 1993-10-07 1995-04-25 Nippondenso Co Ltd Auxiliary unit battery charging system for electric motor vehicle
JP2001320807A (en) * 2000-05-02 2001-11-16 Toyota Motor Corp Vehicle, power supply system controlling device, method of controlling power supply system and vehicle controlling method on starting
JP2002374602A (en) * 2001-06-14 2002-12-26 Yazaki Corp Power supply unit for vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05244704A (en) * 1992-02-26 1993-09-21 Honda Motor Co Ltd Auxiliary power supply for motor vehicle
JPH07107619A (en) * 1993-09-29 1995-04-21 Nippondenso Co Ltd Auxiliary battery charger for electric automobile
JPH07111735A (en) * 1993-10-07 1995-04-25 Nippondenso Co Ltd Auxiliary unit battery charging system for electric motor vehicle
JP2001320807A (en) * 2000-05-02 2001-11-16 Toyota Motor Corp Vehicle, power supply system controlling device, method of controlling power supply system and vehicle controlling method on starting
JP2002374602A (en) * 2001-06-14 2002-12-26 Yazaki Corp Power supply unit for vehicle

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230102A (en) * 2005-02-17 2006-08-31 Toyota Motor Corp Power supply device, automobile equipped therewith, and control method thereof
JP4609106B2 (en) * 2005-02-17 2011-01-12 トヨタ自動車株式会社 Power supply device, automobile equipped with the same, and control method of power supply device
WO2007057757A1 (en) * 2005-11-21 2007-05-24 Toyota Jidosha Kabushiki Kaisha Power supply controller
JP4527048B2 (en) * 2005-12-02 2010-08-18 パナソニックＥｖエナジー株式会社 Secondary battery control device and secondary battery input control method
JP2007159248A (en) * 2005-12-02 2007-06-21 Panasonic Ev Energy Co Ltd Controller for secondary battery and input control method of secondary battery
JP2007159247A (en) * 2005-12-02 2007-06-21 Panasonic Ev Energy Co Ltd Controller for secondary battery and method for controlling output of secondary battery
JP4527047B2 (en) * 2005-12-02 2010-08-18 パナソニックＥｖエナジー株式会社 Secondary battery control device and secondary battery output control method
US7765964B2 (en) 2006-05-25 2010-08-03 Toyota Jidosha Kabushiki Kaisha Variable valve operating device, control method of variable valve operating device, and vehicle equipped with variable valve operating device
EP2020493A4 (en) * 2006-05-25 2017-12-27 Toyota Jidosha Kabushiki Kaisha Variable valve-actuating device, control method for the device, and vehicle carrying the device
WO2007138801A1 (en) * 2006-05-25 2007-12-06 Toyota Jidosha Kabushiki Kaisha Variable valve-actuating device, control method for the device, and vehicle carrying the device
JP2008154397A (en) * 2006-12-19 2008-07-03 Nissan Motor Co Ltd Power controller
JP2008245402A (en) * 2007-03-27 2008-10-09 Nissan Motor Co Ltd Supply voltage controller
WO2008149964A1 (en) * 2007-06-06 2008-12-11 Toyota Jidosha Kabushiki Kaisha Power supply unit of vehicle
US8143859B2 (en) 2007-06-06 2012-03-27 Toyota Jidosha Kabushiki Kaisha Power supply apparatus for vehicle
JP2010172135A (en) * 2009-01-23 2010-08-05 Nissan Motor Co Ltd Charging controller for vehicle and charging control method for vehicle
JP2010226776A (en) * 2009-03-19 2010-10-07 Nissan Motor Co Ltd Device and method for controlling power supply circuit
JP2011031870A (en) * 2009-07-30 2011-02-17 Kia Motors Corp Variable voltage control method for hybrid car
CN101987623A (en) * 2009-07-30 2011-03-23 起亚自动车株式会社 Variable voltage control system and method for hybrid vehicle
JP2011230670A (en) * 2010-04-28 2011-11-17 Honda Motor Co Ltd Electric vehicle
JP2012111267A (en) * 2010-11-19 2012-06-14 Mitsubishi Heavy Ind Ltd Vehicle and its engine starting method
CN104092365A (en) * 2010-12-29 2014-10-08 上海汽车集团股份有限公司 Enabling control method of direct-current high-voltage and low-voltage converter and voltage outputting control method
WO2012127659A1 (en) * 2011-03-23 2012-09-27 株式会社ユニバンス Electric automobile, and electric power source device for electric automobile
JP2014045633A (en) * 2012-08-29 2014-03-13 Nissan Motor Co Ltd Controller for dc-dc converter
JP2015061442A (en) * 2013-09-19 2015-03-30 株式会社オートネットワーク技術研究所 Transformer device
US9623754B2 (en) 2013-10-11 2017-04-18 Fuji Jukogyo Kabushiki Kaisha Electric vehicle
JP2015077042A (en) * 2013-10-11 2015-04-20 富士重工業株式会社 Electric vehicle
JP2017030509A (en) * 2015-07-31 2017-02-09 トヨタ自動車株式会社 Power supply control apparatus
CN106394276A (en) * 2015-07-31 2017-02-15 丰田自动车株式会社 Power supply control system
US9969294B2 (en) 2015-07-31 2018-05-15 Toyota Jidosha Kabushiki Kaisha Power supply control system
CN106394276B (en) * 2015-07-31 2019-01-15 丰田自动车株式会社 Power control system
JP2017100638A (en) * 2015-12-04 2017-06-08 いすゞ自動車株式会社 Hybrid vehicle and control method therefor
CN112706614A (en) * 2020-12-21 2021-04-27 北京百度网讯科技有限公司 Power supply control apparatus for vehicle and vehicle

Similar Documents

Publication Publication Date Title
EP2343211B1 (en) Electric power source system for electrically driven vehicle and its control method
JP2004320877A (en) Power device for drive unit and automobile equipped with the same, and control method of power device
US8571734B2 (en) Power supply system for electrically powered vehicle and method for controlling the same
EP2343210B1 (en) Power supply system for electric vehicle and control method for the same
EP2353920B1 (en) Electrically driven vehicle and electrically driven vehicle control method
US8583307B2 (en) Power supply system for electrically powered vehicle and method for controlling the same
JP5348312B2 (en) vehicle
US10668812B2 (en) Power supply system
JP2008220080A (en) Electric vehicle, charged state estimating method, and computer-readable storage medium recording program for making computer excute charged state estimating method
CN103813928A (en) Battery processing device, vehicle, battery processing method, and battery processing program
JP5796457B2 (en) Battery system and battery system control method
JP6344336B2 (en) Battery system
US11230183B2 (en) Vehicle drive system
JP5783129B2 (en) Electric vehicle
US8200384B2 (en) Electric apparatus and method of controlling the same
US11635470B2 (en) Secondary battery system and SOC estimation method for secondary battery
US10158246B2 (en) Energy storage device, transport apparatus, and control method
JP2017126502A (en) Power storage device, transportation device and control method
JP2010136553A (en) Power supply system and electric vehicle loaded therewith
JP6879136B2 (en) Charge / discharge control device for secondary batteries
KR20170025605A (en) Power conversion control method of for using high voltage vehicle
JP2009290984A (en) Charge/discharge controller for vehicle battery
JP7332287B2 (en) Automotive electrical system
JP2005033898A (en) Power supply of vehicle
JP3772875B2 (en) Control device for hybrid vehicle

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060213

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20061121

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070119

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070724

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070904

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20080318