Frozen LiFePO4 Cells and Charging

[Frank]

Frozen LiFePO4 cells and charging.

It is said among the manufacturers not to charge the cells below 32 F.
Why? Is it another hold over from the Lead Acid issues of the past?

So far no one has tested this issue. Why?

So what do you all think? Or know?

Pete

[LeadFoot]

The solvent which the electrolyte (a lithium salt) is dissolved in is composed of two or more carbonate esters with freezing points that vary from as high as ~35C (ethyl carbonate) to as low as ~3C (dimethyl carbonate). Needless to say, once the solvent freezes the lithium salt comes out of solution and the cell won't accept charge.