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Re: Sucessfully Reconditioning an IMA Battery Pack
Originally Posted by S Keith
(Post 269996)
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. Thank you! |
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) |
Re: Sucessfully Reconditioning an IMA Battery Pack
Can someone please tell me where to hook up the wires for my bulb discharger?
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Re: Sucessfully Reconditioning an IMA Battery Pack
Same place you hooked your grid charger.
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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. |
Re: Sucessfully Reconditioning an IMA Battery Pack
Originally Posted by galenlau
(Post 275625)
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. 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. |
Re: Sucessfully Reconditioning an IMA Battery Pack
OK! That's a good point! Will not drain it below 66V again. Thanks for the further suggestions.
I will update my result in several months. |
Re: Sucessfully Reconditioning an IMA Battery Pack
Originally Posted by galenlau
(Post 275627)
OK! That's a good point! Will not drain it below 66V again. Thanks for the further suggestions.
I will update my result in several months. |
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