howto:electro:supercapacitor
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, immobiliser has 3mA idle current)
- Charges to 14.4V (in ~1 minute)
- After sitting for
- 9 hours voltage drops to 12.2V (cranks up)
- 15 hours voltage drops to 11.2V (cranks up)
- 22 hours voltage drops to 10V (cranks up)
- 34 hours voltage drops to 8.2V (cannot crank up)
howto/electro/supercapacitor.txt · Poslední úprava: 2024/04/21 19:35 autor: harvie