JP2019205275A - 電源装置 - Google Patents
電源装置 Download PDFInfo
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- 238000005086 pumping Methods 0.000 claims description 63
- 230000006866 deterioration Effects 0.000 claims description 21
- 239000000446 fuel Substances 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 23
- 238000000034 method Methods 0.000 description 23
- 238000010586 diagram Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- B60R16/005—Electro-mechanical devices, e.g. switched
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- H—ELECTRICITY
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- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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Abstract
Description
本発明に係る電源装置は、高圧バッテリと低圧バッテリとを備え、DCDCコンバーターが、高圧バッテリ側の電圧を降圧して低圧バッテリ側に供給する。メインスイッチがオン以外の場合でも、DCDCコンバーターが動作し、高圧バッテリからの電力が補機に供給される。これにより、低圧バッテリの過放電による性能劣化を抑制できる。
以下、本発明の一実施形態について、図面を参照しながら詳細に説明する。
図1に、本実施形態における電源装置10の機能ブロック図を示す。電源装置10は、車両に搭載され、高圧バッテリ11(メインバッテリ)と、高圧バッテリ11より出力電圧が低い低圧バッテリ12(補機バッテリ)とDCDCコンバーター13と、制御部14とを含む。高圧バッテリ11と低圧バッテリ12とはDCDCコンバーター13を介して接続される。DCDCコンバーター13からみて高圧バッテリ11側は高圧電力系であり、電動発電機(MG)20等の高圧系の負荷および発電機、あるいは充電器等が接続される。また、DCDCコンバーター13から見て低圧バッテリ12側は低圧電力系であり、エアコン、オーディオ、電子ミラー、降車サポートシステム等の補機30が接続される。なお、電子ミラーや降車サポートシステムのように、非走行中のメインスイッチがオフの状態であっても動作することが要求され、これらが動作することにより、消費電力が所定値より大きくなる補機30を、特定の補機30とよぶことにする。高圧電力系の電圧は、DCDCコンバーター13によって降圧されて低圧電力系に供給されて低圧バッテリ12の充電を行ったり補機30を駆動したりすることが可能である。また、電源装置10は、車両の各種状態や車両に対して行われた操作を表す情報を車両が備える装備システム40から取得することができる。
本実施形態に係る電源装置10の処理の一例を以下に説明する。図2は、電源装置10の処理を説明するタイムチャートである。
<走行前処理>
図3は、電源装置10の走行前処理を説明するシーケンス図である。期間T0の、ユーザーが乗車しておらず、車両が非走行中で、メインスイッチがオフの状態において、装備システム40は、車両に対する操作が行われた場合にこれを検知できるよう待機している。
図4は、電源装置10の走行中処理を説明するシーケンス図である。
(ステップS201):装備システム40が、メインスイッチのオン操作を検出したことを充放電実行部142に通知する。
図5は、電源装置10の走行後処理を説明するシーケンス図である。
(ステップS301):装備システム40が、メインスイッチのオフ操作を検出したことを充放電実行部142に通知する。
本発明によれば、メインスイッチがオフであっても特定の補機に対して高圧バッテリから電力を汲み出して供給することが可能であるため、特定の補機の消費電力が大きくても低圧バッテリのSOC低下がなく、低圧バッテリの品質低下、寿命短縮を抑制することができる。また、特定の補機を備えない場合に比べて、高圧バッテリから特定の補機に供給される分だけ多く、走行中に高圧バッテリを充電するので、不要な充放電による電力ロスや燃費悪化への影響を抑えることができる。また、PCU等の通電時間等に基づく汲み出し可否の判定により、耐久性の観点からの部品保護を図ることができる。また、管理部は、汲み出し分の電力の高圧バッテリへの充電の所要時間を、充放電実行部とのあいだで、所要エネルギーおよび充放電能力に基づく抽象化された要求、応答によって決定するので、多くの構成部品の個別の制御要素間の特性をマッチングする設計が不要となり、インターフェイスや内部処理の設計、実装が容易である。
11 高圧バッテリ
12 低圧バッテリ
13 DCDCコンバーター
14 制御部
20 電動発電機
30 補機
40 装備システム
141 管理部
142 充放電実行部
Claims (4)
- 車両に搭載される電源装置であって、
高圧バッテリと、
前記高圧バッテリより出力電圧が低く、前記高圧バッテリの出力電力によって充電可能な低圧バッテリと、
前記高圧バッテリおよび前記低圧バッテリの充放電制御を行う制御部とを備え、
前記制御部は、前記車両のメインスイッチがオンでない状態において、消費電力が所定値より大きい間、前記高圧バッテリに、所定の車載機器への電力を供給させる汲み出し制御を行う、電源装置。 - 前記制御部は、前記車両の走行中に、次回の非走行期間に前記汲み出し制御において前記高圧バッテリから前記所定の車載機器に供給されると想定される電力である汲み出し電力に相当する蓄電量分、前記車両が前記所定の車載機器を備えない場合に比べて多く、前記高電圧バッテリに充電させる補充電を行う、請求項1に記載の電源装置。
- 前記制御部は、前記補充電の所要時間を、前記汲み出し電力および前記電源システムの充放電能力、および、走行履歴から推定されるトリップ時間に基づいて決定する、請求項2に記載の電源装置。
- 前記制御部は、前記補充電のための前記高圧バッテリの蓄電量の増加量、前記汲み出し制御における前記高圧バッテリの蓄電量の低下量、および、前記所要時間を、前記汲み出し制御および前記補充電を行わない場合に比べて平均燃費悪化量が所定値以下となるように決定する、請求項3に記載の電源装置。
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