Any suggestions? Module replacement, round two

“The Equalizer” from Nexpowerenergy is designed for Lithium batteries, which are balanced from below (at lowest functional voltage) where NiMH are balanced from above at highest possible voltage at a ~1/4 amp.

Also charging to 9.6v is way too high... You probably overcooked the modules that are now running hot.

As always, the first round of module replacement tends to get the pack to last the longest and future rounds of module replacement get a shorter rebuild time. If you can afford to get a lithium pack before they sell out in less than a week definitely do so: https://projectlithium.com/?ref=9qLPw

Otherwise pull the pack and we'll walk you through load testing, self discharge testing, etc. Also if you can find a thermal camera you can find which modules are over-heating soon as you pull the pack out.

 

Hi There, I need to order some battery modules, do you have recommendation of good sellers? Thanks.

 

Professor Joe always has the best modules! He teaches hybrid & electric cars at his local college and regularly spends $20K for the latest in lab grade battery testing equipment. He's on his 3rd system now. His modules are $35 and they almost always end up being the strongest module in the pack. So make sure to not use two of them in same block: https://2ndlifebattery.com/contact-us/

 

Where does he sell his old systems at?

 

Pretty sure he's perpetually looking for a buyer... Most people don't want to invest that much... Give him a call or text or email... He'd love to hear from you.

 

Is it possible to cycle two modules connected in series? A single bus bar on one side, and the positive and negative leads from the charger on the corresponding ends on the other side of the two modules? Would this work?

 

Yes... That's how the pros often do it with tens of thousands in equipment.

 

Thanks for the response.

 

Sounds like your pack is almost perfect. I'd recommend you test it in the car.

 

I also did a discharge curve voltage vs elapsed time. some modules discharge faster than others. When pair two modules, it may be good idea to have sum of two voltage from the paired vs. elapsed time similar for all pair. It needs a computer program for this calculation.