I saw a burned-out Leaf in a tow yard and asked what caused the interior fire (The contents of the motor bay are fine, so if anyone is interested in a 2011 Leaf motor, inverter, front suspension, brake controller, ..., then let me know! The front bumper and radiators and lights are gone.)
It had an after-market secondary battery pack added in the trunk, probably by a hobbyist or someone building a prototype. There was a 97 wire loom coming out of the Leaf battery pack that fed into the auxiliary pack in the trunk, plus two high voltage/high current wires for the power. The auxiliary pack consisted of 18650 style cells in a wooden box in the trunk. The maker of this FrankenLeaf apparently wanted to avoid a BMS for the aux pack and thus wired all the Aux cells in parallel to the Leaf's 96 cell series string. My strong suspicion is that the failure occurred due to the Leaf BMS not being capable to balance the difference in self-discharge between the 18650 cells, because good quality cells have low discharge, but cheap/faulty cells might have high self-discharge and a large variation from cell to cell. The result of imbalance is that cells get over-charged or -discharged although the Leaf BMS should protect from that, but other causes of failure may be a cell shorting, causing the attached Leaf's module to dump all its energy into that failure, or an auxiliary charger that was not under control of the Leaf's BMS, so it could continue to charge until the car caught on fire.... Anybody know who was the owner of this black 2011 Leaf with auxiliary battery pack, the fire probably happened in north Sunnyvale, California? Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info http://www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20161014/9982ecd9/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
