JoeS
Site Moderator
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Joined: Thu Dec 15, 2011 5:47 am
Location: Silicon Valley, California

Re: Problem Charging but it isn't the battery

Sun Aug 18, 2019 7:18 pm

Hi ajsykes07. Presume you're aware of the 'timeout' or pause in charging that the i-MiEV performs randomly. It can initiate at any time after the start of charging and it lasts anywhere between six minutes and about 20 minutes. After this pause, the charging resumes. and the only identified conflict has been with a dual-port ChargePoint public EVSE where the two ports share a common power line, in which case the i-MiEV inexplicably continues charging but at a 1.1kW rate instead of the usual ~3kW.

We haven't determined what triggers this timeout and it's speculated that the reason for it is to measure voltage sag when charging is supended to see if perhaps it's excessive and might be caused by a defective cell. No other EVs do this to our knowledge. Unplugging the car and plugging it back in overrides this timeout and the car continues charging normally.

All EVSEs (except for the specific dual-port ChargePoint) allow the car to resume charging properly after it concludes this 'timeout'. We have numerous references and screenshots of this peculiarity scattered throughout this website.

Could this be your problem, or might it be something else? Have you waited sufficient time (up to 20 minutes) to see if charging resumes by itself?
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

ajsykes07
Posts: 2
Joined: Sun Aug 18, 2019 3:35 pm

Re: Problem Charging but it isn't the battery

Sat Aug 24, 2019 1:23 pm

Hello there. I am familiar with the "timeout" during charging, I've noticed that ever since I got my Juicebox pro two years ago and have been able to see charging session graphs. I've determined this isn't what I'm experiencing though. If I don't catch the issue and manually override it, via the remote or by unplugging and plugging in again, it will sit all night without charging.

DBMandrake
Posts: 156
Joined: Mon Mar 20, 2017 4:57 am
Location: Scotland

Re: Problem Charging but it isn't the battery

Fri Aug 30, 2019 11:09 am

ajsykes07 wrote:Hello there. I am familiar with the "timeout" during charging, I've noticed that ever since I got my Juicebox pro two years ago and have been able to see charging session graphs. I've determined this isn't what I'm experiencing though. If I don't catch the issue and manually override it, via the remote or by unplugging and plugging in again, it will sit all night without charging.

When you say it only happens with Level 2 charging do you mean it doesn't happen with Chademo, or it doesn't happen with Level 1 (110v) charging ?

Level 2 charging operates at 230-240v AC, and these cars seem to abort charging (or fail to start) if the AC voltage goes over about 247 volts.

Here in the UK the AC voltage is typically 230-240 volts, however the specs allow it to range from 216 to 253 volts, so it can be quite a problem here!

I discovered this during bad weather last winter where our AC voltage was up to 248 volts and the car would not charge. The symptom is the EVSE clicks on, the fan on the back of the car does its usual run for a few seconds, the charge light on the dashboard flashes for a few seconds but instead of then going solid red it aborts and the EVSE drops out again.

If the car is already charging and the voltage increases it will abort charging and will not start again even if the voltage drops to a more acceptable level later - you have to unplug it and plug it in again. As the AC voltage can rise a bit into the late evening as the load diminishes (including the diminishing load from the car as the charge starts tapering) this means a charge session could abort randomly some time after it started due to changes in AC load and supply at the property.

So have a look at your charging session graphs and (assuming they report voltage) see if there is any correlation between high voltage and aborted charging.

If you have access to a MUT-III read the fault codes for the OBD (onboard charger) ECU soon after the problem occurs - charge sessions aborted due to high AC voltage record a fault code, and it's likely that charge sessions aborted for other reasons will as well...
- Simon

EV: 2011 Peugeot Ion
ICE: 1997 Citroen Xantia V6

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