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윤상선(Sang Sun Yun),기석철(Seok-Cheol Kee) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
Recently, lithium batteries have been used everywhere. Lithium batteries have the problem of explosion or ignition as opposed to the rechargeable advantage. Therefore, a protection circuit is used for the safety of the battery. One of the typical functions of this BMS(Battery Management System) is capacity and life measurement. The most basic way to measure of the battery is to use the OCV-SOC table. Initially, the only information we can find is temperature and voltage, so we can use the voltage and temperature to predict the state of charge of the battery. However, this prediction only holds when the voltage red from battery is OCV(Open Circuit Voltage). In the case of BMS, since the voltage is not recorded in the OFF state, the calculation is performed assuming that a hour break time is stabilized using the RTC(Real Time Clock). This is an experience gained through several charge and discharge experiments. However, the authors of this paper do not know about the influence of temperature on the change. It is intended to observe the stabilization time by temperature change.