To ensure an opportunity for performing cell balance control for a vehicle battery pack even during vehicle driving without communicating signal with vehicle side.SOLUTION: A battery voltage equalization device 1 for a vehicle battery Bm consisting of a plurality of batteries B connected in series includes: a voltage measurement part 2 for measuring each battery voltage of the battery B; a current measurement part 4 for measuring a charge/discharge current I of the vehicle battery Bm; a cell balance part 7 for equalizing each battery voltage of the battery B; and a control part 8 for controlling voltage equalization through the cell balance part 7 based on a battery voltage measured by the voltage measurement part 2, the control part 8 starts voltage equalization control provided that voltage equalization control is determined necessary based on each battery voltage and the discharge current Id of the vehicle battery Bm measured by the current measurement part 4 is determined stabilized.SELECTED DRAWING: Figure 2
【課題】車両側との信号送受信を行うことなく、車両の走行中においても車載用の組電池に対してセルバランス制御を行う機会を確保する。【解決手段】直列接続された複数の電池Bからなる車載用バッテリBmの電池電圧均等化装置1は、電池Bのそれぞれの電池電圧を計測する電圧計測部2と、車載用バッテリBmの充放電電流Iを計測する電流計測部4と、電池Bのそれぞれの電池電圧を均等化するセルバランス部7と、電圧計測部2が計測する電池電圧に基づいてセルバランス部7を介した電圧均等化制御を行う制御部8と、を備え、制御部8は、それぞれの電池電圧に基づいて電圧均等化制御が必要と判定され、且つ電流計測部4が計測する車載用バッテリBmの放電電流Idが安定したと判定されたことを条件として、電圧均等化制御を開始する。【選択図】図2
BATTERY VOLTAGE EQUALIZATION DEVICE
電池電圧均等化装置
2021-10-11
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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