Hi I found these seemingly amazing 2200 mAh hybrid "capacitors" on Alibaba, called "BTcap 21700 Flash Charge Battery"
Does anyone have an opinions or experience with them? They'd be perfect for my solar-powered project that needs to output a few hundred watts for about a minute. Normally to do that you'd need a few hundred watt hours of battery to get the rate something near 1C. With these guys I just need 2 or 3 of them!
They have a continuous discharge rate of 60 A which is about 30C. Standard charge and discharge are great too at 22 A = 10C.
ESR is really small (11 mOhm), cycle life is huge (30k fast, 50k standard). Their self-discharge is even minimal compared to regular EDLC supercapacitors (see graphs). The voltage range (2.5 V to 4.2 V) is not too far off regular BMS kits.
So... what am I missing? What's the catch? Google can't find me anyone talking about them. Thanks!
4.2v5300f Super Capacitor Lithium Ion Hybrid Capacitor Battery-21700 Battery Pack - Buy 4.2v 2200mah Super Capacitor Battery 4.2v 7900f Large Capacity And High Current Super Capacitor Battery fast High Rate Charge And Discharge Super Capacitor Batter
4.2v5300f Super Capacitor Lithium Ion Hybrid Capacitor Battery-21700 Battery Pack - Buy 4.2v 2200mah Super Capacitor Battery 4.2v 7900f Large Capacity And High Current Super Capacitor Battery fast High Rate Charge And Discharge Super Capacitor Battery Product on Alibaba.com
www.alibaba.com
Does anyone have an opinions or experience with them? They'd be perfect for my solar-powered project that needs to output a few hundred watts for about a minute. Normally to do that you'd need a few hundred watt hours of battery to get the rate something near 1C. With these guys I just need 2 or 3 of them!
They have a continuous discharge rate of 60 A which is about 30C. Standard charge and discharge are great too at 22 A = 10C.
ESR is really small (11 mOhm), cycle life is huge (30k fast, 50k standard). Their self-discharge is even minimal compared to regular EDLC supercapacitors (see graphs). The voltage range (2.5 V to 4.2 V) is not too far off regular BMS kits.
So... what am I missing? What's the catch? Google can't find me anyone talking about them. Thanks!