Electric batteries, Vol. 7, Pages 39: Methodology for Determining Time-Dependent Lead Battery Failure Prices from Field Data
Batteries doi: 10. 3390/batteries7020039
Authors: Rafael Conradt Frederic Heidinger Kai Peter Birke
The safety requirements in vehicles continuously increase due to more automated functions making use of electronic components. Besides the particular reliability of the parts themselves, a reliable power provide is crucial for a safe overall system. Various architectures for a secure power supply think about the business lead battery as a back-up solution for safety-critical applications. Various ageing mechanisms influence the performance of the battery and have an impact on its dependability. In order to meet the criteria the battery with its specific failure modes intended for use in safety-critical programs, it is necessary to prove this reliability by failure rates. Previous research determine the fixed failure rates of lead batteries using data from teardown analyses to distinguish the battery failure modes but do not include the duration of these batteries examined. On the other hand, lifetime values of battery pack replacements in workshops without knowing the reason for failure were utilized to determine the particular overall time-dependent failure rate. This study presents a method for determining reliability models of lead batteries by investigating individual failing modes. Since batteries are susceptible to ageing, the analysis of lifetime values of different failure modes results in time-dependent failure rates of different magnitudes. The failure rates of the individual failure modes develop with different shapes over time, which allows their own ageing behaviour to be evaluated.