Sucessfully Reconditioning an IMA Battery Pack
#91
Re: Sucessfully Reconditioning an IMA Battery Pack
You could have purchased one for about $140 that's literally 16 times better than the one you purchased, and it would give meaningful data. Testing a stick at 0.7A doesn't tell you anything.
At least you've established that you're fine with having it fail.
When I said your setup is laughable, I truly meant it. Alligator clips are horribly unreliable and can completely defeat NiMH delta V termination and frequently cause false positives meaning you'll never get it fully charged. You have alligator clips on alligator clips.
Since you purchased the SkyRC, you should have received a temp probe. Set temperature cut off at 45°C. Strap the temp probe onto the hottest cell.
At least you've established that you're fine with having it fail.
When I said your setup is laughable, I truly meant it. Alligator clips are horribly unreliable and can completely defeat NiMH delta V termination and frequently cause false positives meaning you'll never get it fully charged. You have alligator clips on alligator clips.
Since you purchased the SkyRC, you should have received a temp probe. Set temperature cut off at 45°C. Strap the temp probe onto the hottest cell.
Thank you!
#92
Re: Sucessfully Reconditioning an IMA Battery Pack
Hi guys could you please help me as I'm confused now
I have Honda civic 2007 and trying to recycle cells which are in my opinion in not as bad state
each double pack (12cells) holds between 14.8-15.8v (middle ones the least)
Now I can't take them apart to split doubles as I don't have a way to solder them back so have to charge each double pack
I've set initial numbers to
charge @5A
discharge @ 1A
cut off V @ ?
timer to 148min
cut off peak @ 5mV
capacity @ 11000mah
Could you please confirm those values and tell me what should be cut off V as I'm not sure, I believe 1Vxeach cell so 12V would be too low ?
should I then set it to 14,5V ?
Should I adjust any other values ?
Also should I just connect them to ends on plus and minus or any other way ? (I'm using imax b6)
I have Honda civic 2007 and trying to recycle cells which are in my opinion in not as bad state
each double pack (12cells) holds between 14.8-15.8v (middle ones the least)
Now I can't take them apart to split doubles as I don't have a way to solder them back so have to charge each double pack
I've set initial numbers to
charge @5A
discharge @ 1A
cut off V @ ?
timer to 148min
cut off peak @ 5mV
capacity @ 11000mah
Could you please confirm those values and tell me what should be cut off V as I'm not sure, I believe 1Vxeach cell so 12V would be too low ?
should I then set it to 14,5V ?
Should I adjust any other values ?
Also should I just connect them to ends on plus and minus or any other way ? (I'm using imax b6)
#95
Re: Sucessfully Reconditioning an IMA Battery Pack
Hi S. Keith, I would like to say thank you for providing lots of knowledge about the IMA battery. It helped me successfully recondition my bad IMA battery.
Here is the story:
I bought a second-hand honda civic hyrid 2007 last year. After driving for 1.5 years, the IMA light was on. I tried many times of 12V reset but the IMA light came back soon. Then I looked for many possible options and decided to go for the DIY grid charging solution.
I did learn a lot about circuit knowledge before but I forget most of it. I started to learn everything about IMA battery and found the EVF here is the best place for me. I viewed the discussion about IMA publised from 2013 to 2022, and found your ideas are really helpful.
Here are what I did for my IMA battery :
I removed the IMA battery out off the car.
DIY a grid charger, and charged the battery 24 hours to full at 186V.
Used 40w + 60w bulbs in parallel to discharge the battery to 8.5V
Charged it for 24 hours to full at 190V.
Discharged it to 180V, and installed back to the car.
I justed finished it, and drived it for about 60KM. Of course the IMA light was off. The battery is much better than before. It never droped lower than 6 bars, so no recalibration during the driving. I can tell that the charing (when braking/sliding) is far more efficient than before. Today is the first day after the reconditioning. I am very happy with it, but will keep testing in the coming weeks.
Thanks again.
And I also would like to thank EVF, and anyone contributing to EVF.
Here is the story:
I bought a second-hand honda civic hyrid 2007 last year. After driving for 1.5 years, the IMA light was on. I tried many times of 12V reset but the IMA light came back soon. Then I looked for many possible options and decided to go for the DIY grid charging solution.
I did learn a lot about circuit knowledge before but I forget most of it. I started to learn everything about IMA battery and found the EVF here is the best place for me. I viewed the discussion about IMA publised from 2013 to 2022, and found your ideas are really helpful.
Here are what I did for my IMA battery :
I removed the IMA battery out off the car.
DIY a grid charger, and charged the battery 24 hours to full at 186V.
Used 40w + 60w bulbs in parallel to discharge the battery to 8.5V
Charged it for 24 hours to full at 190V.
Discharged it to 180V, and installed back to the car.
I justed finished it, and drived it for about 60KM. Of course the IMA light was off. The battery is much better than before. It never droped lower than 6 bars, so no recalibration during the driving. I can tell that the charing (when braking/sliding) is far more efficient than before. Today is the first day after the reconditioning. I am very happy with it, but will keep testing in the coming weeks.
Thanks again.
And I also would like to thank EVF, and anyone contributing to EVF.
#96
Re: Sucessfully Reconditioning an IMA Battery Pack
Hi S. Keith, I would like to say thank you for providing lots of knowledge about the IMA battery. It helped me successfully recondition my bad IMA battery.
Here is the story:
I bought a second-hand honda civic hyrid 2007 last year. After driving for 1.5 years, the IMA light was on. I tried many times of 12V reset but the IMA light came back soon. Then I looked for many possible options and decided to go for the DIY grid charging solution.
I did learn a lot about circuit knowledge before but I forget most of it. I started to learn everything about IMA battery and found the EVF here is the best place for me. I viewed the discussion about IMA publised from 2013 to 2022, and found your ideas are really helpful.
Here are what I did for my IMA battery :
I removed the IMA battery out off the car.
DIY a grid charger, and charged the battery 24 hours to full at 186V.
Used 40w + 60w bulbs in parallel to discharge the battery to 8.5V
Charged it for 24 hours to full at 190V.
Discharged it to 180V, and installed back to the car.
I justed finished it, and drived it for about 60KM. Of course the IMA light was off. The battery is much better than before. It never droped lower than 6 bars, so no recalibration during the driving. I can tell that the charing (when braking/sliding) is far more efficient than before. Today is the first day after the reconditioning. I am very happy with it, but will keep testing in the coming weeks.
Thanks again.
And I also would like to thank EVF, and anyone contributing to EVF.
Here is the story:
I bought a second-hand honda civic hyrid 2007 last year. After driving for 1.5 years, the IMA light was on. I tried many times of 12V reset but the IMA light came back soon. Then I looked for many possible options and decided to go for the DIY grid charging solution.
I did learn a lot about circuit knowledge before but I forget most of it. I started to learn everything about IMA battery and found the EVF here is the best place for me. I viewed the discussion about IMA publised from 2013 to 2022, and found your ideas are really helpful.
Here are what I did for my IMA battery :
I removed the IMA battery out off the car.
DIY a grid charger, and charged the battery 24 hours to full at 186V.
Used 40w + 60w bulbs in parallel to discharge the battery to 8.5V
Charged it for 24 hours to full at 190V.
Discharged it to 180V, and installed back to the car.
I justed finished it, and drived it for about 60KM. Of course the IMA light was off. The battery is much better than before. It never droped lower than 6 bars, so no recalibration during the driving. I can tell that the charing (when braking/sliding) is far more efficient than before. Today is the first day after the reconditioning. I am very happy with it, but will keep testing in the coming weeks.
Thanks again.
And I also would like to thank EVF, and anyone contributing to EVF.
I've been where you are. Hopefully in your case, it holds out. My initial results were spectacular, but about 9 months later, the whole pack went south.
In the future avoid discharges below 66V. They really don't buy you anything, and deep discharges can push a marginal cell into full failure rendering the pack unusable.
#98
Re: Sucessfully Reconditioning an IMA Battery Pack
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