Quote:
Originally Posted by dcb
so pony up for lithium, but might need to spend energy on heating the pack (engine coolant?) and efficiency takes a dive at roughly 80% SOC (save the rest for regen I recon). 0.95 * 0.95 efficient at best, fairly constant power input for charging so not hard to optimize, driving demands (and if the engine is on or not) will determine actual discharge efficiency.
I looked up a discharge curve for lithium, higher currents do not have a huge effect on capacity like lead, but some energy might be lost in the additional voltage drop (like 7% or so?).
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Good summary. In very cold weather, the pack will be preheated while charging, but is otherwise heated and cooled by cabin air exhaust, the batteries being happiest in the same conditions as humans.