Secondary batteries with wider temperature range?

[geekEE]

I've been looking at small (something like 18650 size) lithium-ion batteries for a portable application. However, these batteries typically don't want to be charged above a temperature of 45C or discharged above 60C. Does anyone know of a source of other types of batteries that can safely tolerate somewhat higher temperatures (maybe charging around 55-60C and discharging at 70-75C)?
Thanks in advance,
Glenn

 

[VEBill]

I've been pretty deep into primary (non-rechargeable) lithium cells, but not secondary cells (except, like everyone, 18650 cells in consumer grade flashlights, gadgets, etc.). In spite of this, I used my strong Google-Fu to find one example to get you started.

Saft MP & Small VL

"Operating temperature for standard cells: -20°C to +60°C for charge, -50°C to +60°C for discharge. Specific high temperature cells with operating temperature up to + 125°C"

It's not likely to be the optimum solution, but perhaps it'll help you to find what you're looking for. Good luck.

 

[geekEE]

Wow, Saft has a Lithium cell that charges at a temperature of 125C? That sounds terrifying! I'll check them out. Thanks! Apparently my Google-Fu is weak.