POWER SUPPLY SYSTEM

• Main Author: FUMIYA JUN
• Format: Patent
• Language: English; Japanese
• Published: 12.01.2017
• 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 provide a power supply system capable of properly suppressing progress in lifetime deterioration of a secondary battery.SOLUTION: A power supply system comprises: a rectification circuit 11 which rectifies output of an AC power source 50; a control power supply 12 which steps down output of the rectification circuit 11 to a first DC voltage Va and applies the voltage to a control load 18; a battery charger 13 which converts the output of the rectification circuit 11 into a second DC voltage Vb lower than the first DC voltage Va and charges a secondary battery 2; a voltage detection part 14 which detects a terminal voltage across the secondary battery 2; and a control part 16 which determines abnormality of the secondary battery 2 in steps on the basis of a detection value of the voltage detection part 14 and a calculated value of a temperature calculation part 21a, and determines abnormality of the secondary battery 2 in steps using at least one of an ambient temperature, a lifetime deterioration diagnostic result of the secondary battery 2, and a use cumulative time of the secondary battery 2.SELECTED DRAWING: Figure 1 【課題】二次電池の寿命劣化の進行を適切に抑制することができる電力供給システムを得ること。【解決手段】交流電源５０の出力を整流する整流回路１１、整流回路１１の出力を第１の直流電圧Ｖａに降圧して制御負荷１８に印加する制御電源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の端子電圧を検出する電圧検出部１４、ならびに、電圧検出部１４の検出値および温度算出部２１ａの算出値に基づいて二次電池２の異常を段階的に判定し、外気温度、二次電池２の寿命劣化診断結果および二次電池２の使用累積時間のうちの少なくとも一つを用いて二次電池２の異常を段階的に判定する際の閾値を変更する制御部１６を備えた。【選択図】図１