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Liquid cooling for batteries wouldn't be worth it in earbuds, but it probably would in an electric car.
Which is why battery packs in Tesla cars are liquid-cooled.
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> If we can manage to recycle something worth $50, surely we can recycle something that is more valuable. That doesn't follow. Lead-acid car batteries are profitable to recycle because of the chemistry costs, not the unit cost of the battery. So, what are the costs of recycling these batteries? (Note that the answer is in terms of $/pound.) How does that compare to the cost of using new materials? (Again, the answer…
Lithium is worth a lot more than lead so unless there is significant reason to think otherwise they are probably worth recycling.
That doesn't tell us anything about the relatve costs of production and recycling lithium that was used in batteries, which happens to be the relevant question.
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Just as with gasoline-powered vehicles, I would like to have the choice of many different options.
Well, for energy storage and conversion in gasoline powered cars you only have option. Gasoline stored in a tank and combusted in an Otto cycle engine. I don't think that people's driving behaviour is divergent enough to support multiple battery chemistries in the long run.
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Generally given a battery chemistry and manufacturing technology, the charge rates and discharge rates are given in units of "C" which means it allows 1A charge/discharge per Ah capacity of the battery. For instance, the lipoly batteries I got for my combat robot last year were 20C discharge, and 1C charge, and had a capacity of 1800mAh. This means I can discharge at 36A, charge at 1.8A. While true, the charge rate d…
I wouldn't be so sure about it scaling directly even within the same chemistry. Batteries can be manufactured for different purposes. I've seen 10C, 20C and even 40C discharge rates in lithium ion polymer batteries. But the charging rate usually stays under 2C. Personally I don't really care too much about charging rates. My battery powered vehicle would be parked overnight. But I do like acceleration. And that's whe…
To be honest, I'm too worried about discharge rates, since we use them in combat robots, which are designed to last 3 minutes (which ends up being 20C continuous discharge rate). If you consider that you want at least 2 minutes of "full throttle" power over the course of a charge of the batteries, the capacity of them must be enough that the maximum current would be 30C, otherwise the batteries would be dead from just the hot rodding. Being that you're driving more than the 2 minutes of full throttle, I'd suspect that any batteries with enough capacity for an hour drive would have enough discharge rate to support what you needed to do.