Abstract
In order to identify functional safety property of battery management system, safety integrity level of BMS research is performed by average frequency of a dangerous failure of the safety function. The result shows that: currently, functional safety has been research at home and abroad, through evaluation system of road vehicle and electrical, electronic, programmable electronic safety-related systems. So, safety integrity level could be analyzed quantitatively by a functional relation, which is established among tolerable hazard frequency, demand rate on safety-related protection system, dangerous failure of average frequency and safety integrity level. Based on tolerable hazard frequency and the demand rate on safety-related protection system, safety integrity level of a BMS is evaluated as level II.
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