Need help 07 Ima and battery light
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Enthusiast
Joined: Jan 2016
Posts: 43
From: Trinidad and Tobago
Re: Need help 07 Ima and battery light
just a quick update
the pack have been charging for about 10 hr
and the past 4 hr it has been on 192v 260mA
the pack have been charging for about 10 hr
and the past 4 hr it has been on 192v 260mA
Last edited by Ascension; Jan 10, 2016 at 05:05 AM.
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Joined: Sep 2014
Posts: 5,222
From: Mesa, AZ
Re: Need help 07 Ima and battery light
Good. I would expect you to peak in the 192-195 range. Keep going for the full 24 hrs.
I figured out what happened yesterday.
B7-B1 and B2-B9 were both 15.80V at the end of the discharge test. They barely registered any discharge whatsoever.
The car monitors those 11 voltages as it's charging or discharging. Once the first one hits the upper limit, the car stops charging even if the others are low, otherwise, it could damage the highest one.
The opposite is true. When the first tap hits a low limit on discharge, the car stops discharging even if the others are above the limit.. again to prevent damage of the low voltage sticks. This is what triggers the SoC gauge recalibrations.
When we you car-charged yesterday, the car saw those to subpacks hit the max, so it kept terminating the charge earlier than expected. Very little current got into any of the subpacks as a result, so the discharges went WAY faster than expected.
This long, slow grid charge will ensure that all the subpacks get pumped up to near their 100% SoC.
We may need to look for a means of discharging only the strong subpacks, like with a couple 12V 1157 automotive bulbs. Those are cheap, and you could solder/wire them in series and power them with a subpack. Two in series will pull about 1.3A.
If the 145V discharge shows much better balance, we can probably avoid discharging just those subpacks and do 1-2 more whole-pack discharges.
I figured out what happened yesterday.
B7-B1 and B2-B9 were both 15.80V at the end of the discharge test. They barely registered any discharge whatsoever.
The car monitors those 11 voltages as it's charging or discharging. Once the first one hits the upper limit, the car stops charging even if the others are low, otherwise, it could damage the highest one.
The opposite is true. When the first tap hits a low limit on discharge, the car stops discharging even if the others are above the limit.. again to prevent damage of the low voltage sticks. This is what triggers the SoC gauge recalibrations.
When we you car-charged yesterday, the car saw those to subpacks hit the max, so it kept terminating the charge earlier than expected. Very little current got into any of the subpacks as a result, so the discharges went WAY faster than expected.
This long, slow grid charge will ensure that all the subpacks get pumped up to near their 100% SoC.
We may need to look for a means of discharging only the strong subpacks, like with a couple 12V 1157 automotive bulbs. Those are cheap, and you could solder/wire them in series and power them with a subpack. Two in series will pull about 1.3A.
If the 145V discharge shows much better balance, we can probably avoid discharging just those subpacks and do 1-2 more whole-pack discharges.
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Joined: Sep 2014
Posts: 5,222
From: Mesa, AZ
Re: Need help 07 Ima and battery light
More off-line activity.
Schedule didn't permit the discharge before work, so grid charge ran for 24 hours and car was driven.
Anything to report? How did the car perform?
Steve
Schedule didn't permit the discharge before work, so grid charge ran for 24 hours and car was driven.
Anything to report? How did the car perform?
Steve
Thread Starter
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Enthusiast
Joined: Jan 2016
Posts: 43
From: Trinidad and Tobago
Re: Need help 07 Ima and battery light
Hey Steve now reach home, this mrn the car work great, went to work park up for 6 hours,coming back home in traffic the Ima light came back on the soc keeps recal and no assist and charge light ������
Last edited by Ascension; Jan 11, 2016 at 12:45 PM.
Super Moderator
Joined: Sep 2014
Posts: 5,222
From: Mesa, AZ
Re: Need help 07 Ima and battery light
That distance shouldn't be an issue. I had hoped for somewhat better results - either IMA light and limited function or no IMA light and limited function with frequent recalibrations.
I know it's a hassle, but your tap readings 30 minutes after driving might be telling.
I know it's a hassle, but your tap readings 30 minutes after driving might be telling.
