Robert, The Nissan Leaf has an up-to 400V battery pack (nominal 96 x 3.7V = 355V but in practice it is always above 370V unless you are down to the last 30%) The pack is well-contained in a metal shell that is bolted under the car with 10 bolts (17mm head) plus a few 10mm bolts and more 10mm bolts in the plastic belly pan, you only need to remove the front most one of 3 to access the HV cable (2 round power pins) and the OBD and contactor control plug. The contactors in the battery box can be engaged by simply putting 12V on the correct pins on that plug which has standard 0.1 inch "header" style pins and then the internal HV is connected to the HV plug. There are 3 contactors, well documented in the service manuals, one pre-charge and two in the + and - main power busbar. So, it is rather trivial to access that port and get power in/out of the Leaf battery that way, although I am still wondering that even though it is not specified, has anyone ever tried to send ~300V DC into the J1772 plug to check if the Leaf would accept that as charging power? I still need to spend more quality time with the service manuals and possibly take the inverter apart to see if that is a feasible way to get DC solar power directly into the Leaf's pack in an even easier way.
Note that with the direct connect method on the HV plug at the pack, you will not have any protection from over-charge unless you also run a program like LeafSpy that fetches the BMS data and you implement a shut-off once the cell voltages go over approx 4.1 Volts or wherever you decide is your preferred end of charge. The Leaf BMS itself reports a charge level of 4.1V per cell as approx 90% charged. I have recently taken 4 Leaf packs apart and re-assembled 2 of them in a different configuration, to be able to give my neighbors a "new" pack with 2015 "Lizard" cells combined with their old 2011 BMS so their car would not complain about a BMS that it not recognised (which is what I got when I bolted the pack directly into their vehicle, so I had to move the old BMS over - and also retrieve the BMS that my own Leaf was paired to, so now both cars are happy again with seeing their "own" BMS, even though the cells still have found a new home... I also have a US Electricar S10 which has a nominal 312V pack but can use and charge up to about 394V which is the same 90% level of the 96 series cells Leaf pack, that is also the reason I dis-assembled two Leaf packs - those will go into that US Electricar truck and the battery terminals will be easily accessible below the tilt bed and battery box cover, I might even consider an exposed AMP connector to easily plug into the pack. That again does not give protection unless connected downstream from the contactors and those contactors are under control of a BMS to drop them at a max charge level. These are just two of the EVs that I am familiar with and know how to get into for HV DC. 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. -----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Robert Bruninga via EV Sent: Friday, July 15, 2016 7:32 PM To: Electric Vehicle Discussion List Subject: [EVDL] EV's for Armagedon Just curious if we can develop a list of EV's that have some kind of access to the HV battery terminals for a DC trickle charge when all one has is DC solar at up to 500 volts DC and no access to the grid. I know the PRIUS HV battery termnals are easy to get to and easy to trickle charge (and blow up the battery if y ou over do it). I know the THINK-CITY is impossible to get to. All the contactors are inside the sealed battery box which is 700 lbs and is stuck up inside the bottom of the car. Termianls are easy to get to but since the inaccessible contactors are inside the box, you simply cannot get to charge the battery. Hummh... maybe you can fool the BMS and force the contactors to close? Im curious about other production EV's. Im not talking about casual or even hobby charging. I am talking about DESPIRATION charging from a HV series solar DC source when there is no other way to get transportation. How about a LEAF, or a VOLT? ImIev? Bob -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160715/8a64 5691/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) _______________________________________________ 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)
