Revision as of 00:34, 14 August 2019

General Performance

10A discharge, self-protection circuit inside.
3.7V
3 Ahr
18 minutes of 37W
10W for 1 hour
30 of these give 1 kWhr
45g each, so 1 kWhr weighs 1.5 kg.
At this density, ultra light cars (500 lb total) - will have 30 miles per kwhr.
1kwhr ~ 4MJ - so about 1/10 kg gasoline. Given gas is 20% efficient in cars, we have 1/2 kg equivalent. Tbis gets us to about 240 mpg equivalent.
With 1 kW solar added- that gets us to about 400 mpg equivalent.

Can 18650 cells really discharge at 10A rate? Yes! [1] - Panasonic goes up to 20 amp rate. 6S (6 cell) packs are 22v. 10 of these, if discharged at 20A, give a 200A welder for 6 minutes. See Discharge Rate.

While specs say 250 cycles for 15A discharge - Multiple thousands of cycles are possible when charged to 80% and drained to 30%. - [3]

These appear to be on spec at 3000 mAh - [6].
Cycle life and specs - [7] - 250 cycles to 70% of rated
1000 cycles at 6A discharge rate bottoming at about 60% capacity for 2000 cycles? - [8]. So these last pretty long.

Fantastic forms for recycling old 18650s into DIY Power Walls https://secondlifestorage.com/index.php

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 =Discharge Characteristics=
-*Can 18650 cells really discharge at 10A rate? Yes! [https://batteryuniversity.com/learn/article/discharge_characteristics_li] - Panasonic goes up to 20 amp rate. 6S (6 cell) packs are 22v. 10 of these, if discharged at 20A, give a 200A welder for 6 minutes.
+*Can 18650 cells really discharge at 10A rate? Yes! [https://batteryuniversity.com/learn/article/discharge_characteristics_li] - Panasonic goes up to 20 amp rate. 6S (6 cell) packs are 22v. 10 of these, if discharged at 20A, give a 200A welder for 6 minutes. See [[Discharge Rate]].
 =Specs=