NiCoMn battery calendar life

[cwah]

Hello there,

I've recently come across a post about limn2o4 calendar life:
http://www.pedelecs.co.uk/forum/electric-bicycles/10206-voltage-drop-lifepo4-v-limn2o4.html

It is said that it looses in average 14% of the battery capacity every year. With battery utilisation that will also decrease the total capacity, I believe the battery would loose at least 30-40% of its capacity after 2 years... which mean that it's time to change battery.

I think this is the battery I purchased from Conhismotor:
http://www.conhismotor.com/ProductShow.asp?id=161

And this chemistry is very similar to the NiCoMn from BMSBattery:
http://www.bmsbattery.com/48v/249-48v-10ah-lithium-ion-electric-bicycle-battery-pack.html

These batteries have more Wh/kg than lifepo4. But at what cost? How long does that live? And is limn2o4 = NiCoMn?

I don't know what to trust anymore :lol:
Maybe lipo and lifepo4 are the only reliable batteries now...

 

[neptronix]

Maybe lipo and lifepo4 are the only reliable batteries now...

For our hobby market, i agree.
I have spent a very long time trying to find something better than RC Lipo, prismatic lifepo4, and A123.
All cost / size / cycle life considered.... nothing that we can buy on the open market beats em.

Kinda sucks to have everything so stagnant. Watch what happens when some member here finds a used Volt or Nissan Leaf being parted out on eBay though....

 

[cwah]

There are also the Konion that seems to open some possibilities. Good C, number of lifecycles and wh/kg.

However the calendar life still has to be proved. And I don't know who is selling them (as new) :lol: