Why do lithium batteries fail prematurely? What can be done to improve reliability?

[Fumesucker]

Doesn't start with a bang and the speaker isn't particularly inspiring but gets down to nitty gritty on the how and why of lithium cells for you geeky types.

You know who you are.

Some Q/A and practical type advice start at about 1:03:00 or so.

[rafeh1]

1. i built myself an ebike and sell lithium batteries

i built myself an ebike and sell lithium batteries. The main issue i have had is bad BMS (Battery management system). Replace bms battery is fine.

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[Fumesucker]

2. Welcome to DU!

I also have built my own ebike and battery..

My bike with old battery

http://www.democraticunderground.com/1207230

My current battery.

http://www.democraticunderground.com/?com=view_post&forum=1127&pid=60203

BMS is a major headache for small EVs, I don't use one but I charge with a balancing charger and I use a CellLog8S to keep track of cell voltages while I ride. My range is enough that I don't come close to using my entire available charge on my normal ride.

[hunter]

3. God, I hate batteries, almost as much as I hate internal combustion engines and fuel cells.

I'm actually discouraged by the fact that 3 billion plus years of life (at least) did not spit out an animal with batteries and electric muscles.

It seems my future high-tech utopian motorcycle is powered by sugar water fueled "muscles."