One of my problems with the setup that I have is that the Contactor is for both driving and Battery Charging, so, the Contactor ends up being ON almost all of the time. The Mini BMS Modules that are on these batteries, work by breaking a loop circuit. Any time the voltage is above 3.6V or below 2.75V they will open their control circuit and all the BMS' control loops are in one big series string, so that any cell not being happy will cause the contactor to turn OFF, which will turn off the charger or the load. As you can see with this set up, when charging or driving, we have the same contactor sipping power.
One solution of course, would be to have the charging circuit separate from the Load Circuit and I could even have the foot peddle engage and disengage the main contactor, but I still have to deal with charging and since the chargers are not on board, I have to deal with switching the DC input current. I have some transistors ( fets) that I may play with as Cor van de Water suggested for the charger. The head board that comes with this set up seems to be changing with each new revision. I have not had a lot of luck figureing out from the web site, all the little details and how to make a contactor for charging and a contactor for driving be powered from the same board. thanks for all your input. -- Steve Clunn Merging the best of the past with the best of the future. www.Greenshedconversions.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140917/26eb5325/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
