JP7556313B2 - 電動車両および電動車両の充電制御方法 - Google Patents
電動車両および電動車両の充電制御方法 Download PDFInfo
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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
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- B60L2240/00—Control parameters of input or output; Target parameters
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Description
バッテリ10の端子間電圧VBは、バッテリ10の温度等によって変動する。たとえば、バッテリ10の充電時、バッテリ10の端子間電圧VBは、温度の低下に伴い増大する傾向がある。このため、最大出力電圧Vcがバッテリ電圧VBuより高く、昇圧コンバータ20を用いないでバッテリ10を充電しているとき、温度等の影響により端子間電圧VBが、マップから算出したバッテリ電圧VBuより高くなると、最大出力電圧Vcが端子間電圧VBより低くなり、充電が行われない可能性がある。また、バッテリ10の経年変化等により、バッテリ電圧VBuの算出精度が低下した場合、最大出力電圧Vcがバッテリ電圧VBuより高く、昇圧コンバータ20を用いないでバッテリ10を充電しているとき、最大出力電圧Vcが端子間電圧VBより低くなり、充電が行われない可能性がある。変形例1では、昇圧コンバータ20を用いないでバッテリ10を充電している際に、最大出力電圧Vcが端子間電圧VBより低くなっても、バッテリ10の充電を可能とする。
昇圧コンバータ20を使用してバッテリ10の充電を実行すると、昇圧コンバータ20の損失により充電効率が悪化する。このため、ユーザが設定した、充電量(Ah)あるいは充電完了SOCになるまで、昇圧コンバータ20を用いてバッテリ10の充電を継続した場合、充電時間が長くなる可能性がある。この場合、充電料が、充電時間によって課金される場合、充電量に対する充電料の単価が高額になる。変形例2では、充電料の単価が高額になることを抑制可能とする。
バッテリ10の端子間電圧VBは、バッテリ10の温度等によって変動する。最大出力電圧Vcがバッテリ電圧VBuより高く、昇圧コンバータ20を使用しないでバッテリ10を充電しているとき、端子間電圧VBが変動して、最大出力電圧Vcが端子間電圧VBより低くなると、充電が行われない、あるいは昇圧コンバータ20を用いた充電が開始され、当初予定していた充電時間が延びる等、充電が不安定になる可能性がある。また、バッテリ10の温度状態等によりバッテリ電圧VBuの算出精度が低下し、算出したバッテリ電圧VBuが実際のバッテリの充電終了時の端子間電圧より小さくなった場合、昇圧コンバータ20を用いないでバッテリ10を充電しているとき、最大出力電圧Vcが端子間電圧VBより低くなる可能性が高くなり、充電が行われない、あるいは昇圧コンバータ20を用いた充電が開始され、当初予定していた充電時間が延びる等、充電が不安定になる可能性がある。変形例3では、安定的に充電を行える機会を拡大する。
Claims (5)
- 外部電源から充電可能な蓄電装置を備えた電動車両であって、
前記外部電源から供給される電力を昇圧して前記蓄電装置へ供給する昇圧装置と、
前記外部電源から供給される電力を、前記昇圧装置を迂回して、前記蓄電装置へ供給するバイパス経路と、
前記蓄電装置の充電を制御する制御装置と、を備え、
前記制御装置は、
前記外部電源から供給される電力の最大電圧が、前記蓄電装置の充電終了時の端子間電圧より低い場合、
前記最大電圧と前記充電終了時の端子間電圧との差が第1所定値以上のときは、前記昇圧装置を用いて前記蓄電装置を充電し、
前記差が前記第1所定値よりも小さいときは、前記バイパス経路を用いて前記蓄電装置を充電し、
前記最大電圧が前記充電終了時の端子間電圧より高い場合、前記バイパス経路を用いて前記蓄電装置を充電するよう構成されている、電動車両。 - 前記制御装置は、前記バイパス経路を用いて前記蓄電装置を充電しているときに、前記最大電圧が前記蓄電装置の端子間電圧より低くなった場合、前記昇圧装置を用いて前記蓄電装置の充電を実行するよう構成されている、請求項1に記載の電動車両。
- 前記外部電源は直流電力を供給する外部充電設備であり、
前記外部充電設備から供給される直流電力を前記昇圧装置に供給する経路と、前記外部充電設備から供給される直流電力を前記バイパス経路に供給する経路とに切り換える充電リレーを備え、
前記制御装置は、
前記外部充電設備から受信した情報に基づいて、前記外部電源から供給される電力の最大電圧を取得する出力電圧取得部と、
前記蓄電装置の充電終了時のSOCに基づいて、前記充電終了時の端子間電圧を算出する上限電圧演算部と、
前記最大電圧と前記充電終了時の端子間電圧の大きさを比較する比較部と、
前記比較部の比較結果に応じて、前記充電リレーを切り換える切換部と、を備える、請求項1に記載の電動車両。 - 電動車両の充電制御方法であって、
前記電動車両は、
外部電源から充電可能な蓄電装置と、
前記外部電源から供給される電力を昇圧して前記蓄電装置へ供給する昇圧装置と、
前記外部電源から供給される電力を、前記昇圧装置を迂回して、前記蓄電装置へ供給するバイパス経路とを備え、
前記充電制御方法は、
前記外部電源から供給される電力の最大電圧と前記蓄電装置の充電終了時の端子間電圧とを比較するステップと、
前記最大電圧が前記充電終了時の端子間電圧より低く、かつ前記最大電圧と前記充電終了時の端子間電圧との差が第1所定値以上であるとき、前記昇圧装置で昇圧して前記蓄電装置を充電するステップと、
前記最大電圧が前記充電終了時の端子間電圧より低く、かつ前記差が前記第1所定値よりも小さいとき、前記バイパス経路を用いて前記蓄電装置を充電するステップと、
前記最大電圧が前記充電終了時の端子間電圧より高いとき、前記バイパス経路を用いて前記蓄電装置を充電するステップと、を含む、電動車両の充電制御方法。 - 前記蓄電装置の充電終了時のSOCに基づいて、前記充電終了時の端子間電圧を算出するステップを、含む、請求項4に記載の電動車両の充電制御方法。
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JP2021041589A JP7556313B2 (ja) | 2021-03-15 | 2021-03-15 | 電動車両および電動車両の充電制御方法 |
US17/692,178 US20220289058A1 (en) | 2021-03-15 | 2022-03-11 | Electrically powered vehicle and method of controlling charging of electrically powered vehicle |
CN202210243923.4A CN115071457A (zh) | 2021-03-15 | 2022-03-14 | 电动车辆和电动车辆的充电控制方法 |
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US20200361323A1 (en) | 2019-05-17 | 2020-11-19 | Hyundai Motor Company | Multi-input charging system and method using motor driving system |
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