POWER SUPPLY SYSTEM FOR VEHICLE

• Main Authors: DAIHI YUTO, OYAMA KAZUYA, OGUMA HIROKAZU
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2019
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

To provide a power supply system for vehicle comprising two batteries and a voltage converter, capable of reducing loss on the voltage converter and allowing a vehicle to perform a high output travel.SOLUTION: A power supply system comprises: a first drive motor Mr; a second drive motor Mf; a first power line 21 to which a first inverter 3r and a first battery B1 are connected; a second power line 22 to which a second inverter 3f and a second battery B2 are connected; a voltage converter 4 for converting a voltage between the first and second power lines 21, 22; and an ECU for controlling charging/discharging of the first and second batteries B1, B2 by operating the first and second inverters 3r, 3f and voltage converter 4. The ECU discharges insufficient power obtained by subtracting an output of the first battery B1 from a total demand power from the second battery B2 to the second power line 22 when the total demand power is larger than a first output possible power of the first battery B1.SELECTED DRAWING: Figure 5 【課題】２つのバッテリと電圧変換器とを備えた車両の電源システムにおいて、電圧変換器における損失を低減しながら高出力走行を行うことができるものを提供すること。【解決手段】電源システムは、第１駆動モータＭｒと、第２駆動モータＭｆと、第１インバータ３ｒ及び第１バッテリＢ１が接続された第１電力線２１と、第２インバータ３ｆ及び第２バッテリＢ２が接続された第２電力線２２と、第１電力線２１と第２電力線２２との間で電圧を変換する電圧変換器４と、第１及び第２インバータ３ｒ，３ｆ並びに電圧変換器４を操作し第１及び第２バッテリＢ１，Ｂ２の充放電を制御するＥＣＵと、を備える。ＥＣＵは、総要求電力が第１バッテリＢ１の第１出力可能電力より大きい場合には、総要求電力から第１バッテリＢ１の出力分を除いた不足電力を第２バッテリＢ２から第２電力線２２へ放電させる。【選択図】図５