LiON Batteries + Heat - Lifetime

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BuddyNorth

New member
Joined
Jan 27, 2017
Messages
2
Hi Guys.

I have been watching several of you on Youtube for a while now.
I stumbled on this older video regarding how heat, voltageand charge cycle times impact onbattery life and thought some of you might find it interesting.

The presenter isProfessor Jeff Dahn.

I wont pretend that I understood much of the technical details but there was enough general info to be quite interesting.


Cheers

BN


And due to form rules preventing spam here is the YouTube link


if you dont trust the link google : Professor Jeff Dahn WIN seminar

it should be the first hit.
 

hbpowerwall

Administrator
Joined
Oct 7, 2016
Messages
1,977
Nice work around :0 yes seen that three times over and still don't understand it all..lol
 

BuddyNorth

New member
Joined
Jan 27, 2017
Messages
2
hbpowerwall said:
Nice work around :0 yes seen that three times over and still don't understand it all..lol

Yeah the short version is -

* Don't charge to much voltage - 4.1v per cellmax - less ( ~3.9v )is preferred
* keep your cells as cool as practically possible

just watched another video regarding Tesla Model 3 and its battery pack.
Apparently they recommend a 70~80% charge most of the time to help battery life.

When the Tesla packs go to 100% charge there is a bunch of Voodoo that has to happen to balance the cells.
 

Korishan

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Jan 7, 2017
Messages
6,522
LOL a bunch of VooDoo :p That about sums up Tesla ;)
 

3nergE

Member
Joined
Dec 3, 2016
Messages
97
Watched this lecture a few years ago, its quite good, but really just alludes to the anomalous materials in upcoming generations of batteries (that we now use)

Again, keep in mind that most lappy batteries cycle cells hundreds of times to 100% dod at 40c+ and still perform admirably after years of cycles. Laptops are pretty much worst case, and consider the extremely low input and output currents and low ceiling voltage of most of our rigs, I cant see it being a problem for us getting 10 years out of our rigs regardless of summer temps.

Given the large capacities of some powerwalls in the diy arena, 20 years might be more likely.

Its far more likely the cells around in the future will prompt upgrades due to performance and capacity advantages. At least for those rigs that are up-gradable (coughs). Ive done close to 500kWh from my little 6kWh bank with little noticeable reduction in capacity.

Power on Baby!
 
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