Obviously it's a different NiMH cell/pack but some results are worth to mention here as well. Many of you have probably seen it, the hybridinterfaces test with OEM packs for PHEV application. Namely, they charge upto 4x of them in parallel (<4kWh for driving) via hacked Zivan charger (formely Pb profile). Even with <0.15C charging they ran into potential thermal/issues at the end of the cycle (T2,T3); so not only proper cooling but some additional safety circuits are necessary (diodes, timer, .. as proposed in your thread also). So, yours 350mA CC looks much safer anyway, most importantely with regard the issue of possible build up of internal pressure in combination with elevated ambient temp and bad charging wiring/design could result in quite dangerous situations.
Thanks to Mike & Peter for documenting their charging setups based on MeanWell LED supplies, surely it could be adapted to Prius as well; hybridinterfaces level: 238.7VDC by 5x ~48V or rather
*Mike/Peter's approach: 4x ~47.6V CV + 1x CC 3V to 48V
suitable CC led supply ~500mA (still bellow 0.1C):
PLC-30-48 Current&V adj.
There has been one "exploded" PHEV Prius using Zivan already and it's not pretty, basically the car is a write-off because of the violantly released toxic stuff everywhere. However, the install seemed as pretty unsafe to begin with, so can't blame the Zivan only, pumping in summer almost 0.5C (+ 2 OEM packs) without proper cooling and robust tight down of these packs looks rather foolish in retrospective..
OEM pack based PHEV charging
charger timer circuit/ideas
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Btw. Mike charged subpacks 300mA upto 8.47V for full equalization (~14hrs), which translates into 237.16V for the Prius OEM pack
*
http://www.99mpg.com/Projectcars/mimapackwhack/
