howto:electro:supercapacitor
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Supercapacitor experiments
Greencap 16V 83F (6x 2.7V 500F)
Each cap can handle 2.7V long term, 2.85V short term. Balancer starts discharging overcharged caps through 1 ohm power resistor once they overshoot 2.8 - 2.85 V.
Self discharge current is expected to stabilize at relatively low value after 100 hours of being charged.
- Absorbtion current (initial)
- Leakage current (constant)
Replacing lead acid battery with supercapacitor
- UPS (replaced 12V 7Ah)
- There is some inefficiency in conversion from 12VDC to 220VAC
- UPS stops discharging at 10.2V (under load, which might translate to ~11V with no load)
- 8W LED was running for over 5 minutes
- 100W incadescent bulb was running for 30 seconds
- Piaggio scooter (replaced 12V 10Ah AGM)
- Charges to 14.4V (in ~1 minute)
- After sitting for 9 hours voltage drops to 12.2V (cranks up)
- After sitting for 15 hours voltage drops to 11.2V (cranks up)
- After sitting for 22 hours voltage drops to 10V
- At 8V (cannot crank up)
howto/electro/supercapacitor.1713632780.txt.gz · Poslední úprava: 2024/04/20 19:06 autor: harvie