PROBLEM TO BE SOLVED: To appropriately detect an overcurrent abnormality produced in a battery, when a current not to be desired to make electric conduction in the battery is different depending on battery charge/discharge and a temperature.SOLUTION: An overcurrent abnormality detection device 1 includes: a current detection unit 9 which detects a current flowing through a battery 2; a temperature detection unit 10 which detects the temperature of the battery 2; a threshold setting unit 121 which sets a threshold Ith according to a temperature detected by the temperature detection unit 10 while the battery 2 is being charged or according to a temperature detected by the temperature detection unit 10 while the battery 2 is being discharged; and an overcurrent abnormality detection unit 122 which detects the occurrence of the overcurrent abnormality in the battery 2 when the current, detected by the current detection unit 9, becomes the threshold Ith or larger.SELECTED DRAWING: Figure 1
【課題】電池の充放電や温度によって電池に通電させたくない電流が異なる場合でも、電池に発生する過電流異常を適切に検出する。【解決手段】電池2に流れる電流を検出する電流検出部9と、電池2の温度を検出する温度検出部10と、電池2の充電中に温度検出部10により検出される温度に応じて、又は、電池2の放電中に温度検出部10により検出される温度に応じて、閾値Ithを設定する閾値設定部121と、電流検出部9により検出される電流が閾値Ith以上になると、電池2に過電流異常が発生していることを検出する過電流異常検出部122とを備えて過電流異常検出装置1を構成する。【選択図】図1
OVERCURRENT ABNORMALITY DETECTION DEVICE AND OVERCURRENT ABNORMALITY DETECTION METHOD
過電流異常検出装置及び過電流異常検出方法
2016-05-16
Patent
Electronic Resource
Japanese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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