Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - The greatest idea ever, or the worst idea ever? ("Free" BMS)

jakobnev · 10-18-2020, 07:03 PM

NiMH batteries are known to not need balancing even in series packs. Liion and LTO chemistries are known to need balancing.

Here's the idea: Use NiMH batteries in parallel with other batteries to keep them balanced!

When building a Liion pack, use three NiMH cells for each Lithium cell, or two for each LTO cell.

"But NiMH aren't free!"

No, but you get to use their capacity too! The BMS:ing they provide is free!

Stupid crazy - or crazy stupid?

10-18-2020, 07:03 PM	#1 (permalink)
jakobnev Eco-ventor Join Date: Oct 2010 Location: sweden Posts: 1,645 Princess - '92 Mazda MX-3 GS House of Tudor Team Mazda 90 day: 53.54 mpg (US) *Shirubāarō (´ω｀)* - '05 Toyota Prius Executive Team Toyota 90 day: 54.88 mpg (US) Blue Thunder - '20 Hyundai IONIQ Trend PHEV Team Hyundai Plug-in Hybrids 90 day: 194.72 mpg (US) Thanks: 76 Thanked 709 Times in 450 Posts	The greatest idea ever, or the worst idea ever? ("Free" BMS) NiMH batteries are known to not need balancing even in series packs. Liion and LTO chemistries are known to need balancing. Here's the idea: Use NiMH batteries in parallel with other batteries to keep them balanced! When building a Liion pack, use three NiMH cells for each Lithium cell, or two for each LTO cell. "But NiMH aren't free!" No, but you get to use their capacity too! The BMS:ing they provide is free! Stupid crazy - or crazy stupid? __________________ 2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US) 2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)