3 ms·
Lithium ion cannot output enough (low C) to make this feasible (yet). Much more likely using Li-Po cells, which are far more adept at emptying themselves at hig
by CrazyCatDog 6y ago
Lithium ion cannot output enough (low C) to make this feasible (yet). Much more likely using Li-Po cells, which are far more adept at emptying themselves at high load—but thermal runaway (eg insanely hot fires) is all too real with Li-Po, though less so today than say 6 years ago!
- nikda 6y agoFrom Wikipedia: A lithium polymer battery, or more correctly lithium-ion polymer battery (abbreviated as LiPo, LIP, Li-poly, lithium-poly and others), is a rechargeable battery of lithium-ion technology using a polymer electrolyte instead of a liquid electrolyte.
- Robotbeat 6y agoYou’d be surprised. There are some high-C lithium ion cells, but they’re not as easily available as LiPo. If you need to dump your power over 4-10 minutes or longer at peak power, there are lithium ion cells available. Less than 4 minutes, LiPo is still better for now.
- CrazyCatDog 6y agoTotally agree. My use case: 3 seconds max (launch), 3 seconds in-flight would be out of sight— total power on time between charges is well below one minute. I’m tempted to guess that this would be the most efficient way of converting electricity in wing suit applications as well.
- jononor 6y agoThat is more supercapacitor territory than batteries, especially if you do not require long-term energy storage (can accept relatively high self-discharge). The energy recovery systems in Formula 1 racing (KERS) are examples.
- Robotbeat 6y agoWhat’s interesting is that in many cases, LiPos can equal the specific power of supercapacitors!