POWER STORAGE SYSTEM

• Main Authors: SUGII HIROMASA, OCHI MAKOTO, SAKATANI TOSHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PERFORMING OPERATIONS; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

PROBLEM TO BE SOLVED: To provide a technique for judging the state of a lead battery on the basis of the discharge current of a power storage part, in a power storage system in which the lead battery is connected in parallel to the power storage part.SOLUTION: The power storage system for supplying power to the load of a vehicle includes: a power supply unit which includes the lead battery and the power storage part connected in parallel to the lead battery; a measurement part which measures a current value flowing from the power storage part to the vehicle load; and a judgment part to judge the state of the lead battery. The judgment part acquires the current value of a discharge current flowing from the power storage part to the vehicle load through the measurement part, and judges the deterioration of the lead battery on the basis of the acquired current value in the power storage part. 【課題】鉛バッテリと蓄電部を並列に接続する蓄電システムにおいて、蓄電部の放電電流に基づいて鉛バッテリの状態を判定する技術を提供する。【解決手段】蓄電システムは、車両の負荷に電力を供給する蓄電システムであって、鉛バッテリと、鉛バッテリに並列に接続される蓄電部と、を含む電源部と、蓄電部から車両の負荷へ流れる電流値を測定する計測部と、鉛バッテリの状態を判定する判定部と、を備える。判定部は、計測部を介して蓄電部から車両の負荷へ流れる放電電流の電流値を取得すると共に、取得する蓄電部の電流値に基づいて鉛バッテリの劣化を判定する。【選択図】図３