JP2015226341A - 電源制御装置および電源制御方法 - Google Patents
電源制御装置および電源制御方法 Download PDFInfo
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Abstract
Description
図1は、第1実施形態としての電源装置100の概略構成を示す説明図である。この電源装置100は、例えば、自動車に搭載される電源装置である。本実施形態における自動車は、例えば、ガソリンエンジンを動力源とするガソリン車であり、アイドリングストップと、エンジンが発生するトルクや減速時の回生(回生ブレーキ)による充電と、を実施する。アイドリングストップとは、停車時にエンジンを停止させ、走行を開始する前にエンジンを再始動させることである。
|VBt1−VBt2|≦Vth ・・・(1)
なお、閾値Vthとしては、並列接続によるエネルギーロスとして許容できる電圧の差が適宜設定される。例えば、出力電圧の基準値の1%〜10%の範囲のいずれかの値が設定される。
第2実施形態は、第1実施形態と同じ電源装置100(図1参照)を前提とし、電源制御部84によって実行される並列接続の制御フローを、第1実施形態の並列接続の制御フロー(図2参照)とは異なる制御フローとした場合について説明する。
第3実施形態も、第2実施形態と同様に、第1実施形態と同じ電源装置100(図1参照)を前提とし、電源制御部84によって実行される並列接続の制御フローを、第1実施形態の並列接続の制御フロー(図2参照)とは異なる制御フローとした場合について説明する。
図13は、第4実施形態としての電源装置100Bの概略構成を示す説明図である。この電源装置100Bは、図1の電源装置100の第1バッテリ10と第1の電源ラインPL1との間に接続スイッチ(SWb)72を設けた点が、第1実施形態の電源装置100と異なっており、他の点は同じである。なお、以下では、第1の電源ラインPL1と第2の電源ラインPL2との間の接続スイッチ(SWa)70を「第1の接続スイッチ70」とも呼び、第1バッテリ10と第1の電源ラインPL1との間に接続スイッチ(SWb)72を「第2の接続スイッチ72」とも呼ぶ。
本発明は、本明細書の実施形態や実施例、変形例に限られるものではなく、その趣旨を逸脱しない範囲において種々の構成で実現できる。例えば、発明の概要の欄に記載した各形態中の技術的特徴に対応する実施形態、実施例、変形例中の技術的特徴は、先述の課題の一部又は全部を解決するために、あるいは、先述の効果の一部又は全部を達成するために、適宜、差し替えや、組み合わせを行うことができる。その技術的特徴が本明細書中に必須なものとして説明されていなければ、適宜、削除できる。例えば、以下のものが例示される。
20…第2バッテリ
30…オルタネータ
40…スタータ
50…第1補機群
60…第2補機群
70…接続スイッチ
72…接続スイッチ
74…保護スイッチ
80…制御装置
82…Alt制御部
84…電源制御部
100…電源装置
100B…電源装置
VBt1…第1バッテリ電圧
VBt2…第2バッテリ電圧
PL1…第1の電源ライン
PL2…第2の電源ライン
Vth…閾値
Claims (7)
- 複数の蓄電池と、前記複数の蓄電池への充電を行なう発電機とを含む電源装置において、前記複数の蓄電池の並列接続を制御する電源制御装置であって、
前記複数の蓄電池の出力電圧の比較を行なう電圧比較部と、
a)前記電圧比較部において比較の対象とされた複数の蓄電池のうち最も低い出力電圧の蓄電池に対する前記発電機からの給電による充電処理と、b)前記電圧比較部において比較の対象とされた複数の蓄電装置のうち最も高い出力電圧の蓄電池から、前記最も高い出力電圧の蓄電池に接続される負荷回路への放電処理と、のいずれか一方による電圧調整を行なう電圧調整部と、
前記電圧調整部による前記電圧調整の結果、前記複数の蓄電池の互いの出力電圧の差が予め定めた閾値以下となった場合に、前記並列接続を行なう接続処理部と、
を備えることを特徴とする電源制御装置。 - 請求項1に記載の電源制御装置であって、
前記複数の蓄電地は、それぞれに独立して設けられた接続スイッチを介して前記発電機に並列に接続されるとともに、前記接続スイッチを介して互いに並列に接続される構造、もしくは、前記複数の蓄電地は、前記複数の蓄電地のうち一つの蓄電地は前記発電機に並列に直接接続され、他の蓄電地はそれぞれに設けられた接続スイッチを介して前記発電機に並列に接続されるとともに、前記接続スイッチを介して互いに並列に接続される構造であることを特徴とする電源制御装置。 - 請求項1または請求項2に記載の電源制御装置であって、
前記並列接続の実行要求があった場合に、前記電圧比較部が前記複数の蓄電池の出力電圧の比較を行い、前記電圧調整部が前記比較の結果に基づいて前記電圧調整を行い、前記接続処理部が前記電圧調整の結果に基づいて前記並列接続を行なうことを特徴とする電源制御装置。 - 請求項1から請求項3のいずれか一項に記載の電源制御装置であって、
前記電圧調整部は、前記発電機が発電している状態においては前記充電処理による前記電圧調整を行い、前記発電機が発電していない状態においては前記放電処理による前記電圧調整を行なうことを特徴とする電源制御装置。 - 請求項4に記載の電源制御装置であって、
前記複数の蓄電池は、前記発電機に直結される第1の蓄電池と、接続スイッチを介して前記第1の蓄電池に並列接続される第2の蓄電池とを含み、
前記電圧調整部は、
前記第1の蓄電池の出力電圧が前記第2の蓄電池の出力電圧よりも低い場合には、前記発電機が発電している状態において前記第1の蓄電池の前記充電処理による前記電圧調整を行い、
前記第1の蓄電池の出力電圧が前記第2の蓄電池の出力電圧よりも高い場合には、前記発電機が発電していない状態において前記第1の蓄電池の前記放電処理による前記電圧調整を行ない、
前記接続処理部は、
前記第1の蓄電池と前記第2の蓄電池の互いの出力電圧の差が前記閾値以下となった場合に、前記接続スイッチを閉じることにより前記第1の蓄電池と前記第2の蓄電池との並列接続を行なう
ことを特徴とする電源制御装置。 - 請求項5に記載の電源制御装置であって、
前記電圧調整部は、
前記第1の蓄電池の出力電圧が前記第2の蓄電地の出力電圧よりも低い場合において、前記発電機が発電していない状態であったときには前記発電機を発電している状態に変更して前記第1の蓄電池の前記充電処理による前記電圧調整を行い、
前記第1の蓄電池の出力電圧が前記第2の出力電圧よりも高い場合において、前記発電機が発電している状態であった際には前記発電機を発電している状態に変更して前記第1の蓄電池の前記放電処理による前記電圧調整を行なう
ことを特徴とする電源制御装置。 - 複数の蓄電池と、前記複数の蓄電池への充電を行なう発電機と、を有する電源装置において、前記複数の蓄電池の並列接続を制御する電源制御方法であって、
前記複数の蓄電池の出力電圧の比較を行なう工程と、
a)前記比較において比較の対象とされた複数の蓄電装置のうち最も低い出力電圧の蓄電池に対する前記発電機からの給電による充電処理と、b)前記比較において比較の対象とされた複数の蓄電装置のうち最も高い出力電圧の蓄電池から、前記最も高い出力電圧の蓄電池に接続される負荷回路への放電と、のいずれか一方による電圧調整を行なう工程と、
前記電圧調整の結果、前記複数の蓄電池の互いの出力電圧の差が予め定めた閾値以下となった場合に、前記並列接続を行なう工程と、
を備えることを特徴とする電源制御方法。
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