VEHICLE POWER SUPPLY DEVICE

• Main Authors: TOMONAGA DAIKI, TANIYAMA KOICHI, MOTOHASHI TOSHIYUKI, SASAMOTO KAZUTAKA, ABE YUTA, KIKUCHI YOSHIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 04.07.2024
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; PERFORMING OPERATIONS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

To detect the occurrence of abnormal current while the vehicle is stopped.SOLUTION: A monitoring unit 31 of a vehicle power supply device 1 turns off a relay 41 to disconnect a battery 20 from a charge/discharge path 5 when the voltage of the battery 20 deviates from the range between an upper limit value Vu and a lower limit value Vl. A threshold setting unit 32 sets an upper limit value Vu and a lower limit value Vl from among an upper limit value Vvu and a lower limit value Vvl, which are set based on the usable voltage range according to the characteristics of the battery 20, and an upper limit value Vtu and a lower limit value Vtl, which are set based on the amount of voltage fluctuation caused by the occurrence of an abnormal current according to a temperature T of the battery 20.SELECTED DRAWING: Figure 1 【課題】車両の停止中に、異常電流の発生を検出する。【解決手段】車両電源装置１の監視部３１は、バッテリ２０の電圧が、上限値Ｖuおよび下限値Ｖlの間の範囲を逸脱する場合に、リレー４１をオフにして、バッテリ２０を充放電経路５から遮断する。閾値設定部３２は、バッテリ２０の特性に応じた使用可能な電圧範囲に基づいて設定される上限値Ｖvuおよび下限値Ｖvlと、バッテリ２０の温度Ｔに応じた異常電流の発生による電圧変動量に基づいて設定される上限値Ｖtuおよび下限値Ｖtlの中から、上限値Ｖuおよび下限値Ｖlを設定する。【選択図】図１