| Accelerated Life Testings(ALTs) and Acceleration Modeling of Battery Disconnecting Systems(BDS) | ||||
| Author | Sung-Min Kim
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| Co-Author(s) | Kwang-Min Lee; Jeong-Hwan Cho
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| Abstract | The accelerated life tests(ALTs) of battery disconnecting systems(BDS) under high temperature were investigated. In the field, the main failure mechanisms of current sensor, busbar, pre-charge resistor and ev-relay that are parts of a battery disconnection systems(BDS) are instant short circuit, contact resistor, instant change rate of operating time of being caused by vibrations of electric vehicle(EV) and generation of heat. The acceleration modeling of Arrhenius equation related to temperature and accelerated life testings (ALTs) of BDS under high temperature were carried out. For battery disconnecting systems (BDS), testing conditions of the same failure-mechanism were adopted in according to accelerated stress and accelerated life testings & acceleration factors were developed. The accelerated life testings were carried out at 85 °C, 105 °C. A Minitab program was used to calculate an acceleration factor and estimate three parameters of a life test model and at normal conditions average life of BDS was calculated. To improve the reliability of BDS, inadequate capacitors were replaced by accurate capacitors for adjusting time constant of the BDS.
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| Keywords | ALTs(accelerated life testings), Acceleration model, Acceleration factor(AF), Reliability, Modeling, Life testings, Arrhenius equation, BDS(battery disconnecting system), EV (electric vehicle) | |||
| Article #: 19183 | ||||
August 5-7, 2013 - Honolulu, Hawaii, U.S.A. |