Sunday, December 28, 2014

Battery and charging forward..

I have been busy with work and holiday schedules but made it out to the garage to check on the batteries.
I took some readings after charging and letting the batteries rest for a few weeks, I found that one cell had dropped to nearly zero and the other 49 were at 3.31 +/-.
I managed to work the cell out without full disassembly of the rear pack and install a spare cell that came with the original set of batteries.
I put it on charge and cut the charge off when the cells all read about 3.51. I would have fully charged, but wanted to watch the finish due to no BMS, I will come back to this when I have some time to monitor things.

5 comments:

  1. Jerry,

    Are you going to bottom balance the cells?

    Randy

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  3. I assumed taking them down to 1 volt bottom balanced them. I had planned on bottom balancing this winter, I was going to see if they will run the car before spending time balancing.

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  4. I should have gone back back to your previous post. I disconnect my IOTA DC-DC converter and plug it into 120 vac when I am not going to use it for awhile. I did the same thing as you and ran my pack down once but caught it before the cells went below 3 volts. I didn't plug the DC-DC in to the 120 ac one time and fried a cell in a Ballistic 12 volt battery. It looks like you caught it in time if it only destroyed one cell though.

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  5. I should have gone back back to your previous post. I disconnect my IOTA DC-DC converter and plug it into 120 vac when I am not going to use it for awhile. I did the same thing as you and ran my pack down once but caught it before the cells went below 3 volts. I didn't plug the DC-DC in to the 120 ac one time and fried a cell in a Ballistic 12 volt battery. It looks like you caught it in time if it only destroyed one cell though.

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