To detect an abnormality of a power unit due to a factor except an abnormality of equalization processing.SOLUTION: A power unit 40 performs equalization processing for equalizing a charge amount of a battery cell 13 of a battery pack 10 if necessary in a processing period T1, and does not perform the equalization processing in an idle period T2. An abnormality diagnostic apparatus 50 has a period detection unit 51, an increase amount detection unit 52 and a diagnostic unit 53. The period detection unit 51 detects at least one of the processing period and the idle period in an evaluation period which is the period from a predetermined point of time to diagnostic timing. The increase amount detection unit 52 detects a variation increase amount ΔZ which is a value obtained by subtracting a predetermined reference value from a variation value Z showing variation of the charge amount of the battery cell 13 in the diagnostic timing. The diagnostic unit 53 diagnoses that the power unit 40 is abnormal on condition that an evaluation value E which becomes larger as the processing period is long, or becomes smaller as the idle period is long is larger than a first threshold, and the variation increase amount ΔZ is larger than a second threshold.SELECTED DRAWING: Figure 1
【課題】均等化処理の異常以外の要因による電源装置の異常を、発見できるようにする。【解決手段】電源装置40は、処理期間T1には、必要に応じて組電池10の電池セル13の充電量を均等化する均等化処理を行い、休止期間T2には均等化処理を行わない。異常診断装置50は、期間検出部51と増加量検出部52と診断部53とを有する。期間検出部51は、所定時点から診断タイミングまでの期間である評価期間内における処理期間及び休止期間の少なくとも一方を検出する。増加量検出部52は、診断タイミングにおける電池セル13の充電量のバラツキを示すバラツキ値Zから、所定の基準値を減算した値であるバラツキ増加量ΔZを検出する。診断部53は、処理期間が長いほど大きくなる、又は休止期間が長いほど小さくなる評価値Eが、第1閾値よりも大きく、且つバラツキ増加量ΔZが第2閾値よりも大きいことを条件に、電源装置40を異常と診断する。【選択図】図1
ABNORMALITY DIAGNOSTIC APPARATUS OF POWER UNIT
電源装置の異常診断装置
2020-09-03
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 / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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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