JP7051775B2 - 燃料電池システム、燃料電池システムの制御方法、およびプログラム - Google Patents
燃料電池システム、燃料電池システムの制御方法、およびプログラム Download PDFInfo
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Description
(1):この発明の一態様に係る燃料電池システムは、燃料電池と、前記燃料電池により発電された電力を蓄電する蓄電装置と、少なくとも前記燃料電池の発電制御を行う制御装置と、を備えた燃料電池システムであって、前記制御装置は、前記蓄電装置の充電率を取得し、前記蓄電装置に蓄電された電力が外部の機器に給電される場合、前記燃料電池を発電させて前記蓄電装置の充電率を上昇させる第1制御と、前記燃料電池の発電電力を前記第1制御よりも制限して前記蓄電装置の充電率を低下させる第2制御とを実行し、前記外部の機器から要求される電力需要が所定電力よりも大きくなり、または、前記外部の機器から要求される電力需要が前記所定電力よりも大きい状態が所定時間以上継続した切換条件が満たされた場合、前記切換条件が満たされる以前に比して、前記第1制御を行っている場合に前記燃料電池に発電させる発電電力を大きくするものである。
以下、図面を参照し、本発明の燃料電池システム、燃料電池システムの制御方法、およびプログラムの第1実施形態について説明する。以下の説明において、電動車両1は、燃料電池において発電された電力を走行用の電力として用いる燃料電池車両であるものとする。
図1は、燃料電池システム10の構成の一例を示す図である。燃料電池システム10は、例えば、電動車両1に搭載されるシステムである。燃料電池システム10は、定置型のシステムであってもよい。電動車両1は、燃料電池において発電された電力を走行用の電力として用いる燃料電池車両である。燃料電池システム10は、少なくとも、モータ12と、駆動輪14と、ブレーキ装置16と、車両センサ20と、変換器32と、BTVCU(Battery Voltage Control Unit)34と、バッテリシステム(蓄電装置)40と、制御装置50と、充電口60と、FC(Fuel Cell:燃料電池)ユニット100とを備える。燃料電池システム10は、給電装置210を含んでもよい。
図2は、第1実施形態に係るFCユニット100の構成の一例を示す図である。
図3は、車両走行時において、FCユニット100に要求されるFC要求電力が比較的小さい場合のバッテリ42のSOCおよびFCユニット100から出力される電力(「FC出力」)の一例を示すグラフである。図3に示す例では、FCユニット100は、バッテリ42のSOCの初期値が第1閾値X1未満である場合には、バッテリ42のSOCを上昇させるように、FCユニット100からバッテリ42に電力を出力する。この場合、FCユニット100は、例えば、発電効率が最大となる発電電力を発電し、発電された電力をバッテリ42に出力する。
以下、第1実施形態に係る燃料電池システム10の制御コンピュータである制御装置50における一連の処理の流れについてフローチャートを用いて説明する。図6は、制御装置50により実行される処理の流れの一例を示すフローチャートである。図6に示すフローチャートは、例えば、バッテリシステム40が充電口60を介して給電装置210に接続された場合に実行される。
以下、第2実施形態について説明する。第2実施形態は、第1実施形態と比較すると、
給電装置の機能によって、バッテリ42だけでなく、車両の外部に設けられた外部バッテリを用いて、電動機器への給電を行う点で処理内容が異なる。以下、この相違点を中心に説明する。
Claims (4)
- 燃料電池と、
前記燃料電池により発電された電力を蓄電する蓄電装置と、
少なくとも前記燃料電池の発電制御を行う制御装置と、を備えた燃料電池システムであって、
前記制御装置は、前記蓄電装置の充電率を取得し、
前記蓄電装置に蓄電された電力が外部の機器に給電される場合、前記燃料電池を、前記燃料電池の発電効率が高くなる第1発電電力で発電させて前記蓄電装置の充電率を上昇させることと、前記燃料電池の発電電力を前記第1発電電力よりも制限して前記蓄電装置の充電率を低下させることと、を繰り返し実行し、
前記外部の機器から要求される電力需要が所定電力よりも大きい状態が所定時間以上継続した切換条件が満たされた場合、前記燃料電池を、前記第1発電電力よりも大きい第2発電電力で発電させて前記蓄電装置の充電率を上昇させることと、前記燃料電池の発電電力を前記第2発電電力よりも制限して前記蓄電装置の充電率を低下させることと、を繰り返し実行する、
燃料電池システム。 - 前記制御装置は、前記切換条件が満たされる以前には、発電効率が最大となる発電電力を前記燃料電池に発電させる、
請求項1記載の燃料電池システム。 - 燃料電池と、
前記燃料電池により発電された電力を蓄電する蓄電装置と、
を備える燃料電池システムの制御装置が、
少なくとも前記燃料電池の発電制御を行い、
前記蓄電装置の充電率を取得し、
前記蓄電装置に蓄電された電力が外部の機器に給電される場合、前記燃料電池を、前記燃料電池の発電効率が高くなる第1発電電力で発電させて前記蓄電装置の充電率を上昇させることと、前記燃料電池の発電電力を前記第1発電電力よりも制限して前記蓄電装置の充電率を低下させることと、を繰り返し実行し、
前記外部の機器から要求される電力需要が所定電力よりも大きい状態が所定時間以上継続した切換条件が満たされた場合、前記燃料電池を、前記第1発電電力よりも大きい第2発電電力で発電させて前記蓄電装置の充電率を上昇させることと、前記燃料電池の発電電力を前記第2発電電力よりも制限して前記蓄電装置の充電率を低下させることと、を繰り返し実行する、
燃料電池システムの制御方法。 - 燃料電池と、
前記燃料電池により発電された電力を蓄電する蓄電装置と、
を備える燃料電池システムの制御コンピュータに、
少なくとも前記燃料電池の発電制御を行う処理と、
前記蓄電装置の充電率を取得する処理と、
前記蓄電装置に蓄電された電力が外部の機器に給電される場合、前記燃料電池を、前記燃料電池の発電効率が高くなる第1発電電力で発電させて前記蓄電装置の充電率を上昇させることと、前記燃料電池の発電電力を前記第1発電電力よりも制限して前記蓄電装置の充電率を低下させることと、を繰り返し実行する処理と、
前記外部の機器から要求される電力需要が所定電力よりも大きい状態が所定時間以上継続した切換条件が満たされた場合、前記燃料電池を、前記第1発電電力よりも大きい第2発電電力で発電させて前記蓄電装置の充電率を上昇させることと、前記燃料電池の発電電力を前記第2発電電力よりも制限して前記蓄電装置の充電率を低下させることと、を繰り返し実行する処理と、
を実行させるプログラム。
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