iMiEV charging, J1772 testing

Mitsubishi EV Interest Group
nuggetgalore
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Re: iMiEV charging, J1772 testing

Post by nuggetgalore »

mark_hetho wrote:
Wed, 01 Jul 2020, 07:01
Wow, we can blame the 12V battery for a lot of ills apparently!

Once the charging session starts, the DC-DC converter should keep the voltage up, but I suppose without enough voltage the car can't quite get to that point.
Yes, you are probably correct.
When starting the car, the auxiliary battery gets boosted quickly from the traction battery,(allowing the system to run) but the handshake process to make sure the charging is safe (waterpump,fan, (AC?)) might draw too much out of a weak 12V battery. Could even be a contributing factor in damaging the charger(relays not closing firmly or chattering on /off). Just speculation of course,but good reason to have a sound auxiliary.

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