JP7344435B2 - 車両駆動装置 - Google Patents
車両駆動装置 Download PDFInfo
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- JP7344435B2 JP7344435B2 JP2019103841A JP2019103841A JP7344435B2 JP 7344435 B2 JP7344435 B2 JP 7344435B2 JP 2019103841 A JP2019103841 A JP 2019103841A JP 2019103841 A JP2019103841 A JP 2019103841A JP 7344435 B2 JP7344435 B2 JP 7344435B2
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- battery
- capacitor
- coil
- voltage
- switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
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- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Description
このように構成された本発明によれば、キャパシタの電荷を、充電回路を介してバッテリへ放出することにより、バッテリを充電することができる。このとき、例えば、キャパシタに外部電源から充電電力を供給することにより、実質的に、外部電源によりバッテリと電源用キャパシタを同時に充電することができる。
このように構成された本発明によれば、バッテリの電荷を、充電回路を介してキャパシタへ放出することにより、キャパシタを充電することができる。
このように構成された本発明によれば、バッテリにより電源用キャパシタを充電する場合、バッテリと電源用キャパシタの合計電圧を増加させることができる。よって、合計電圧が外部電源の下限電圧より低い場合、合計電圧を昇圧することにより、外部充電可能とすることができる。
図5は外部充電処理の処理フロー、図6は外部充電処理内の充電前情報処理の処理フロー、図7は外部充電処理内の充電処理の処理フローである。図8は外部充電時における電流及び電圧の変位を示すタイムチャート、図9は外部充電時の各ステージにおける電気スイッチの開閉位置及び電流の流れを示す図である。
図10はキャパシタ充電処理の処理フロー、図11はキャパシタ充電処理時における電流及び電圧の変位を示すタイムチャート、図12はキャパシタ充電処理時の各ステージにおける電気スイッチの開閉位置及び電流の流れを示す図である。
本実施形態によれば、車両1に搭載された車両駆動装置10であって、充電式のバッテリ18及びキャパシタ22が直列接続されている電源3と、バッテリ18の電圧が提供される主駆動モータ16(第1の車両駆動モータ)と、バッテリ18とキャパシタ22の合計電圧(Vin)が提供される副駆動モータ20(第2の車両駆動モータ)と、電源3に接続された充電回路19と、充電回路19を介して電源3の充放電を制御する制御回路24と、を備え、充電回路19は、コイル19a(第1のコイル)と、コイル19b(第2のコイル)と、コイル19a及びコイル19bを磁気的に結合する鉄心19cと、コイル19aとキャパシタ22を電気的に接続及び切断するためのスイッチSW1(第1のスイッチ)と、コイル19bとバッテリ18を電気的に接続及び切断するためのスイッチSW2(第2のスイッチ)と、を備え、制御回路24は、スイッチSW1及びスイッチSW2を操作して、バッテリ18とキャパシタ22の充放電を制御するように構成されている。
3 電源
10 車両駆動装置
16 主駆動モータ(第1の車両駆動モータ)
17 外部電源
18 バッテリ
18a バッテリセル
19 充電回路
19a コイル(第1のコイル)
19b コイル(第2のコイル)
19c 鉄心
19A 第1直列回路
19B 第2直列回路
20 副駆動モータ(第2の車両駆動モータ)
22 キャパシタ
24 制御回路
28 電気負荷
G 車体アース
N0,N1 接続点
SWbatt,SWcap スイッチ
SW1,SW2 スイッチ(第1、第2のスイッチ)
Claims (6)
- 車両に搭載された車両駆動装置であって、
充電式のバッテリ及びキャパシタが直列接続されている電源であって、前記バッテリの正極端子と前記キャパシタの負極端子とが接続され、且つ前記バッテリが複数のバッテリセルの直列接続からなる前記電源と、
前記バッテリの電圧が提供される第1の車両駆動モータと、
前記バッテリと前記キャパシタの合計電圧が提供される第2の車両駆動モータと、
前記電源に接続された充電回路と、
前記充電回路を介して前記電源の充放電を制御する制御回路と、を備え、
前記車両駆動装置は、
前記キャパシタの正極端子に接続され第1のインバータを介して前記第2の車両駆動モータに電力を供給する第1の電力ラインと、
前記バッテリの正極端子に接続され第2のインバータを介して前記第1の車両駆動モータに電力を供給する第2の電力ラインと、
前記バッテリの正極端子とは異なる電圧を供給するように前記複数のバッテリセルのうち特定のバッテリセルの正極端子に接続され、前記車両の車載電気機器に直流電力を供給する第3の電力ラインと、を更に備えており、
前記充電回路は、第1のコイルと、第2のコイルと、前記第1のコイル及び前記第2のコイルを磁気的に結合する鉄心と、前記第1のコイルと前記キャパシタを電気的に接続及び切断するための第1のスイッチと、前記第2のコイルと前記バッテリを電気的に接続及び切断するための第2のスイッチと、を備え、
前記制御回路は、前記第1のスイッチ及び前記第2のスイッチを操作して、前記バッテリと前記キャパシタの充放電を制御するように構成されている、車両駆動装置。 - 前記キャパシタの定格電圧は、前記バッテリの定格電圧よりも大きい、請求項1に記載の車両駆動装置。
- 前記第1のコイルと前記第1のスイッチの第1直列回路が、前記キャパシタと並列接続され、
前記第2のコイルと前記第2のスイッチの第2直列回路が、前記バッテリと並列接続され、
前記第1直列回路と前記第2直列回路は、接続点において直列接続されており、
前記接続点は、前記バッテリの正極端子に接続されている、請求項1又は2に記載の車両駆動装置。 - 前記制御回路は、
前記第1のスイッチを閉状態にすると共に前記第2のスイッチを開状態にして、前記キャパシタに蓄えられているエネルギーの一部を前記第1のコイルに蓄える第1段階と、
前記第1のスイッチを開状態にすると共に前記第2のスイッチを閉状態にして、前記第1のコイルに蓄えられたエネルギーを、前記鉄心及び前記第2のコイルを介して前記バッテリに向けて放出して前記バッテリを充電する第2段階と、
を複数回繰返すように前記充電回路を制御する、請求項3に記載の車両駆動装置。 - 前記制御回路は、
前記第1のスイッチを開状態にすると共に前記第2のスイッチを閉状態にして、前記バッテリに蓄えられているエネルギーの一部を前記第2のコイルに蓄える第3段階と、
前記第1のスイッチを閉状態にすると共に前記第2のスイッチを開状態にして、前記第2のコイルに蓄えられたエネルギーを、前記第1のコイルを介して前記キャパシタに向けて放出して前記キャパシタを充電する第4段階と、
を複数回繰返すように前記充電回路を制御する、請求項3又は4に記載の車両駆動装置。 - 前記キャパシタは、蓄積可能な電荷が、前記バッテリに蓄積可能な電荷よりも少なく構成されている、請求項1~5のいずれか1項に記載の車両駆動装置。
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