JP2018098874A - 駆動システムおよび車両 - Google Patents
駆動システムおよび車両 Download PDFInfo
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- JP2018098874A JP2018098874A JP2016240151A JP2016240151A JP2018098874A JP 2018098874 A JP2018098874 A JP 2018098874A JP 2016240151 A JP2016240151 A JP 2016240151A JP 2016240151 A JP2016240151 A JP 2016240151A JP 2018098874 A JP2018098874 A JP 2018098874A
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- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
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Abstract
Description
A−1.駆動システムの構成:
図1は、本発明の第1実施形態における駆動システム100の電気系統を示す説明図である。駆動システム100は、例えば、車両に搭載される。駆動システム100は、燃料電池スタック(FCスタック)10と、燃料電池用昇圧コンバータ20と、燃料電池用リレー回路30と、インバータ40と、エアコンプレッサMG1と、駆動モータMG2と、バッテリ50と、バッテリ用リレー回路60と、バッテリ用昇圧コンバータ70と、制御装置80と、を備える。
図2は、制御装置80のCPUによって実行される故障時処理を示すフローチャートである。この故障時処理は、駆動システム100の稼働時に所定時間毎に繰り返し実行される。処理が開始されると、制御装置80のCPUは、まず、燃料電池用昇圧コンバータ20に備えられる電流センサ22から受信した電流値ILを取得する(ステップS110)。
以上、詳述したように第1実施形態の駆動システム100では、故障時処理によって、燃料電池用昇圧コンバータ20に備えられる逆流防止用ダイオードDXの短絡故障が検出されたときに、燃料電池電圧Vfがバッテリ電圧Vbより高い場合、エアコンプレッサMG1と駆動モータMG2とを停止して、燃料電池用リレー回路30を遮断する。一方、バッテリ電圧Vbが燃料電池電圧Vf以上である場合には、水素ガスの供給および空気の供給を行うことによって、燃料電池スタック10の発電電圧を高め、その後、燃料電池用リレー回路30を遮断する。このため、駆動システム100によれば、逆流防止用ダイオードDXが短絡故障したときに、バッテリ用昇圧コンバータ70側から燃料電池用昇圧コンバータ20を経て燃料電池スタック10へ電流が逆流することを十分に抑制できる。したがって、第1実施形態の駆動システム100によれば、逆流防止用ダイオードが短絡故障して燃料電池用リレー回路30を遮断する際に、リレーの接点(燃料電池用第1メインリレーFCRBと燃料電池用第2メインリレーFCRG)が溶着することを防止できる。
第2実施例における駆動システムは、第1実施例における駆動システム100と比べて、制御装置80のCPUによって実行される故障時処理が相違するだけであり、その他の構成は、第1実施例における駆動システム100の構成と同一である。同一の構成要素については、図1と同一の符合を付して、以下の説明を行う。
・変形例1:
前記各実施形態および各変形例では、駆動モータMG2およびエアコンプレッサMG1が電動発電機に該当するが、これに換えて、駆動モータMG2およびエアコンプレッサMG1のうちのいずれか一方であってもよい。
前記第1実施形態では、制御装置80は、駆動システム100の電気系統(図1)の構成要素と、駆動システム100のガス系統および冷媒系統の構成要素との双方を制御する構成であった。これに対して、変形例として、電気系統(図1)の構成要素を制御する制御装置80(第1の制御装置)と、ガス系統および冷媒系統の構成要素を制御する第2の制御装置とを個別に用意し、第1の制御装置と第2の制御装置との間で通信を行いながら、停止時処理を実行する構成としてもよい。また、制御装置は、電気系統用のもの、ガス系統および冷媒系統用のものといった区分以外にも、電気系統(図1)の構成要素である燃料電池用昇圧コンバータ20、インバータ40、バッテリ用昇圧コンバータ70等の中で複数に区分する構成等、種々の区分けによって、例えば2つ、3つ、4つ等の2以上の数の制御部を用いる構成としてもよい。さらに、制御装置80の替わりに備えられた別の制御部が、機能の一部として制御装置80の機能を備えていてもよい。
第1実施形態では、燃料電池の電圧を二次電池の電圧に対して相対的に高める電圧制御として、燃料電池スタック10に水素ガスの供給および空気の供給を行うことによって、燃料電池スタック10の発電電圧を高めていた。第2実施形態では、電圧制御として、バッテリ側補機の消費電力を上昇させることを行っていた。これらに対して変形例として、水素ガスの供給および空気の供給を行うことと、バッテリ側補機の消費電力を上昇させることの双方を実行する構成としてもよい。
12…燃料電池用電圧センサ
20…燃料電池用昇圧コンバータ
20a…一次側配線
20b…二次側配線
20c…点
22…電流センサ
30…燃料電池用リレー回路
40…インバータ
50…バッテリ
52…バッテリ用電圧センサ
60…バッテリ用リレー回路
65…配線
70…バッテリ用昇圧コンバータ
70a…一次側配線
70b…二次側配線
80…制御装置
90…高圧補機
90a…水素ポンプ
90b…冷却ポンプ
90c…空調装置(エアコン)
91…昇圧DC/DCコンバータ
95…低圧補機
96…降圧DC/DCコンバータ
100…駆動システム
C1,C2…コンデンサ
Ca…コンデンサ
D1,D2…ダイオード
DX…逆流防止用ダイオード
Da…ダイオード
FCRB…燃料電池用第1メインリレー
FCRG…燃料電池用第2メインリレー
FCRP…燃料電池用プリチャージリレー
IL…電流値
L1…コイル(リアクトル)
La…コイル(リアクトル)
MG1…エアコンプレッサ
MG2…駆動モータ
R…制限抵抗
S1,S2…スイッチング素子
SMRB…バッテリ用第1メインリレー
SMRG…バッテリ用第2メインリレー
SMRP…バッテリ用プリチャージリレー
Sa…スイッチング素子
Vb…バッテリ電圧
Vf…燃料電池電圧
Claims (8)
- 駆動システムであって、
電動発電機を含む駆動装置と、
燃料電池と、
二次電池と、
前記燃料電池と前記駆動装置との間に接続される燃料電池用昇圧コンバータであって、前記燃料電池側へ電流が流れることを防止するダイオードを備える燃料電池用昇圧コンバータと、
前記燃料電池用昇圧コンバータと前記駆動装置との間の配線に接続されるリレーと、
前記二次電池と、前記配線における前記リレーよりも前記駆動装置側の部分との間に接続される二次電池用昇圧コンバータと、
前記燃料電池の電圧を測定する燃料電池用電圧センサと、
前記二次電池の電圧を測定する二次電池用電圧センサと、
制御部と、
を備え、
前記制御部は、
前記ダイオードの短絡故障が検出された場合に、前記二次電池用昇圧コンバータを停止し、
前記二次電池用昇圧コンバータの停止後、前記測定された燃料電池の電圧が前記測定された二次電池の電圧よりも高い場合に、前記リレーを遮断し、
前記二次電池用昇圧コンバータの停止後、前記測定された二次電池の電圧が前記測定された燃料電池の電圧以上である場合に、前記燃料電池の電圧を前記二次電池の電圧に対して相対的に高める電圧制御を実行し、前記リレーを遮断する、駆動システム。 - 請求項1に記載の駆動システムであって、
前記電圧制御は、前記燃料電池へ供給する反応ガス量を増加することによって前記燃料電池の電圧を高める制御である、駆動システム。 - 請求項2に記載の駆動システムであって、
前記制御部は、
前記測定された燃料電池の電圧が前記測定された二次電池の電圧よりも高い場合に前記リレーを遮断する前に、前記電動発電機を停止させる、駆動システム。 - 請求項2または請求項3に記載の駆動システムであって、
前記制御部は、
前記電圧制御を実行後に、前記測定された燃料電池の電圧が前記測定された二次電池の電圧よりも高い場合に、前記電動発電機を停止させ、前記リレーを遮断し、
前記電圧制御を実行後に、前記測定された二次電池の電圧が前記測定された燃料電池の電圧以上の状態が予め定められた時間、継続した場合に、前記電動発電機を停止させることなく、前記リレーを遮断する、駆動システム。 - 請求項1に記載の駆動システムであって、
前記二次電池から給電を受ける電気機器を備え、
前記電圧制御は、前記電気機器の消費電力を上昇させる制御である、駆動システム。 - 請求項5に記載の駆動システムであって、
前記制御部は、
前記測定された燃料電池の電圧が前記測定された二次電池の電圧よりも高い場合に前記リレーを遮断する前に、前記電動発電機を停止させる、駆動システム。 - 請求項5または請求項6に記載の駆動システムであって、
前記制御部は、
前記電圧制御を実行後に、前記測定された燃料電池の電圧が前記測定された二次電池の電圧よりも高い場合に、前記電動発電機を停止させ、前記電気機器の稼働を継続しながら前記リレーを遮断し、
前記電圧制御を実行後に、前記測定された二次電池の電圧が前記測定された燃料電池の電圧以上の状態が予め定められた時間、継続した場合に、前記電動発電機を停止させることなく、前記電気機器の稼働を継続しながら前記リレーを遮断する、駆動システム。 - 請求項1から請求項7までのいずれか一項に記載の駆動システムを備える、車両。
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| DE102017128131B4 (de) | 2025-12-18 |
| DE102017128131A1 (de) | 2018-06-14 |
| CN108232251A (zh) | 2018-06-29 |
| US20180162233A1 (en) | 2018-06-14 |
| DE102017128131A9 (de) | 2018-08-09 |
| JP6500881B2 (ja) | 2019-04-17 |
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