dogman said:what can you do if you have to park in the sun?
dogman said:This is the climate where Allcells system might work really good.
wb9k said:Cold is not a problem (meaning damage of risk to the cell) until you get to about -20C (-4F) and you try to charge too fast--this plates Li.
dh
jag said:Hi dh,
Thanks for your good advice. I would like to ask what you consider "charge too fast" at low temp to be?
wb9k said:Cold is not a problem (meaning damage of risk to the cell) until you get to about -20C (-4F) and you try to charge too fast--this plates Li.
dh
To be more specific, I have a 16s pack of 20Ah A123 on my eBike. For overnight charging I use a small 1.8A charger in the garage. Is charging with c/10 all right at -20C? How about -25C or -30C? (If it gets too cold I could bring the bike in, but it is a bit of a hassle to get up the stairs and my wife doesn't like it sitting inside)
Martin (Canada)
friendly1uk said:The oz890 based smart bms has a temp probe. The oz890 chip actually supports two. I don't know how it works, but I suspect currant limitation would work for discharge not just charging. It's not the answer alone, but could be helpful.
It's so easy to forget peoples weather is different to mine. With 105 start temps one could get really silly with both insulation and peltier heat pumps. You need a mini fridge