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The sodium-ion batteries are said to work satisfactorily down to -40 Celsius = -40 Fahrenheit. -20 Celsius just happens to be a temperature for which a retenti
by adrian_b 7mo ago
The sodium-ion batteries are said to work satisfactorily down to -40 Celsius = -40 Fahrenheit.
-20 Celsius just happens to be a temperature for which a retention ratio was specified in the parent article, and not the limit of the operation range.
- nulltrace 7mo agoOperating at -40 is one thing, charging at -40 is another.
- 8note 7mo agoi would have imagined that charging at -40 is easier than operating at -40.
- adrian_b 7mo agoI have no idea how true this is, but the press releases claimed that both most of the capacity is retained down to -40 and that the charging speed is proportionally retain down to -40, and that this is the meaning of the operational range.
- nulltrace 7mo agoRight, good to know.
- Dylan16807 7mo agoWhen you're at a charger you can easily spare the 3-4% of battery capacity it takes to heat the pack by 40C. Less if you use a heat pump.
- pjc50 7mo agoHow many people let their ICE engine block get that cold?
- nottorp 7mo agoFor -40, the anecdote for combustion engines used to be that in Siberia you turn on the car's engine in november and off in march. For -20 though, it can happen each year in 4 season temperate climates and north of that.