Ok, I did a little bit of research. Anyone care to double check this ?
Here's one for $42 at unit quantity. 1200F, max voltage 2.7V
https://www.digikey.com/product-detail/en/tecate-group/TPLH-2R7-1200SL60X74/2085-TPLH-2R7-1200SL60X74-ND/9930298
Energy is
E = 1/2 CV^2
where E is joules.
Joules to watt hours is
Wh = 0.000278 J (approx)
So,
Wh = 0.000278 * 1/2 * 1200 * 2.7^2
= 1.2 Wh
If that's correct, I'd need about 100 of these to have an operating
energy capacity of around 100Wh. (My original parameter was 150Wh for a
battery, but that included margin to ensure only charging between about
15% and 80%.)
I'll say right now that 100 caps at $40 is a non starter :)
Peri
------ Original Message ------
From: "Peri Hartman" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: 16-Apr-20 7:06:38 AM
Subject: Re[2]: [EVDL] custom battery
I'm looking at supercaps. I appreciate that a few people have suggested this,
though I don't know yet whether it could be done economically.
Peri
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