POWER SUPPLY SYSTEM, AND DETERIORATION DIAGNOSTIC METHOD FOR SECONDARY BATTERY

• Main Author: FUMIYA JUN
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2016
• 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; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

PROBLEM TO BE SOLVED: To obtain a power supply system and a deterioration diagnostic method for a secondary battery, capable of accurately and quickly grasping a replacement time for the secondary battery.SOLUTION: A power supply system comprises: a rectification circuit 11 for rectifying output of an AC power supply 50; a step-down power supply 12 for stepping down output of the rectification circuit 11 to a first DC voltage Va to apply the first DC voltage to a load 60; a battery charger 13 for converting the output of the rectification circuit 11 to a second DC voltage Vb lower than the first DC voltage Va to charge a secondary battery 2 with the second DC voltage; a voltage detection unit 14 for measuring a terminal voltage of the secondary battery 2; a current detection unit 15 for measuring charging/discharging current of the secondary battery 2; a control unit 16 for controlling an operation state of the battery charger on the basis of detection values of the voltage detection unit 14 and the current detection unit 15; and an operation display unit 24 for instructing the control unit 16 to perform a life deterioration diagnosis for the secondary battery 2 and displaying a result of the life deterioration diagnosis.SELECTED DRAWING: Figure 1 【課題】二次電池の交換時期を正確且つ迅速に把握することができる電力供給システムおよび二次電池の劣化診断方法を得ること。【解決手段】交流電源５０の出力を整流する整流回路１１と、整流回路１１の出力を第１の直流電圧Ｖａに降圧して負荷６０に印加する降圧電源１２、整流回路１１の出力を第１の直流電圧Ｖａよりも低い第２の直流電圧Ｖｂに変換して二次電池２を充電するバッテリチャージャ１３、二次電池２の端子電圧を計測する電圧検出部１４、二次電池２の充放電電流を計測する電流検出部１５、電圧検出部１４および電流検出部１５の検出値に基づいてバッテリチャージャの動作状態を制御する制御部１６ならびに、制御部１６に二次電池２の寿命劣化診断を指示し、寿命劣化診断の結果を表示する操作表示部２４を備えた。【選択図】図１