Why can’t lithium batteries be charged below 0 °C?

SOLiCORE Q8.6. [can you charge lithium below freezing · lithium low temperature charging] Below freezing, lithium plates onto the anode as metal instead of intercalating, permanently raising internal resistance and risking internal shorts. A competent BMS blocks it. It matters in Australia more than most vendors admit, TMR requires roadside cabinets to hold a minimum 0 °C with a thermostatic heater for exactly this reason.