2008 e4 batt display shows ~50% but battery measured 13.0V

GEM Forum
42

Is it possible that the DQ stored profiles can get corrupted by a random glitch?

I swear I have seen some character changes when playing with these. I might try loading a profile again and see if a flaky charger goes back to being stable.

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43

I have a spare 72v delta q laying around if you want to try to swap chargers. Also the deltaq PC programmer you can borrow.

I need to get over to Steveā€™s house anyway to update his charger profile

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44

I recall Dave warning me that sometimes certain versions of the firmware upgrades can cause the lithium profiles to be buggy with certain hardware configurations of the chargers. Kind of ā€œstart with lowerst revision when reflashing and if that works, stop, donā€™t go to a higher revisionā€

Also, once you flash one of those firmwares on, you canā€™t run lead acid profiles anymore. And the lithium profiles wonā€™t run on the firmware that the chargers come with.

45

Iā€™d be up for trying another 72V DQ with the lead/gel profiles. Thanks!

46

You can go back to lead, just not Polaris profiles. The Factory Deltaq lead profiles work fine.

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47

I have a DMM logging to a laptop and I can see itā€™s now at 95.6V across the battery.
all are at ~15.9 with one at 16.09.

just 10 minutes later and I see 95.8 and was watching and it was going up slowing, ie not a jump.
95.9V now.

96.5V on the bank and most are at 16.08 with one at 16.18. Itā€™s on Stage 1 so lowish current and I donā€™t know about you but this doesnā€™t look like one battery is really out of whack and causing the charger to go into OV error mode.

Iā€™m thinking this FrankenGEM got a dorked charger as the UC service dorks threw parts at this to sell.

So should I try reprogramming or should I first try ā€˜rebootingā€™ the thing by switching profiles and switching back to 14 again?

97.1V on the pack and all batteries are 16.1 or more and it still wants to keep chargingā€¦
Pulling the plug.

48

I just got back in town. I have to head down towards the beach tomorrow, I can drop off another charger if you want to try that. What profile(s) do you want on there?

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49

Ernie lent me a DQ and I put it into algorithm 6( 100aH Gel ) and connected to my gel battery pack and itā€™s down to stage 2 and still only 84V being put on the pack. Thatā€™s 14V on each battery instead of 16.+ the FrankenGEM has installed.

Now on Stage 1(lowest) and battery pack/charge voltage is up at 86.1V so it is walking up. Monitoring to see if it walks upto 96V(16Vea) like the onboard one does and it has hit 94.3V now so that is similar. Batteries at ~15.8 with one at 16.2V. The external DQ charged without ending with an error, unlike the onboard DQ.

I will try walking through the algorithms on the FrankenGEM Delta-Q and back to #6 and see what happens or maybe try a firmware update and reprogramming the algorithms.

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50

Am I remembering correctly that the tap tap method of changing the DQ profile doesnā€™t work with the PSDM in the loop( ie tapping at the battery pack B+ )? If so, were is the best place to do the tap tapping?

51

FYI, after putting a loaner DQ setup for profile #6 on the gel battery pack and charged it, I then drove it around for 6 miles and I could feel it was dragging on the last run up the ā€œhillā€(slight uphill grade). So I put a KiloWat meter inline with the onboard charger and charged it until it was on stage 1 for a bit, showed ~100W going in and then I looked at the KiloWat meter and it showed only 3.7kWh moved through the setup. they are ~100ah batteries so even at a low 12.6Vea thatā€™s only 75.6V or 7.56kWh.
Since thereā€™s losses in the charger and losses in the conversion at the batteries, even a 20% combined loss would have asked for another 1.5kWh and 30% loss would have asked for an additional 2.5kWh above what went into the battery. So if only 3.7kWh went out the AC outlet, possibly 1.2kWh - 2.2kWh went into the batteries.

I know it would have been better to have static battery voltages but it was late, I needed the vehicle the next morning and all other measurements have shown all the batteries at the same SoC when fully charged and when partially discharged. ie no outliers.

I still have not cycled the onboard charger through itā€™s profiles and back to #6 then test to see if it errors out on these batteries. The loaner did not error out but it did walk up the voltage in stage 1 to over 16.0V each just like the onboard one does before it errors out.