Thursday, January 29, 2015

Everything You wanted to know about Lithium LiFeP04 Batteries

Soon I will start this section but for now I will post some links here as I find them:

Lithium Batteries


CALB info


MSDS Report


Yes other cell chemistries have greater capacity fade at elevated temperatures compared to LiFePO4 but that doesn't mean LiFePO4 is immune.  From another paper:

"Excellent long-term cycling stability was demonstrated for C-
LiFePO4 /graphite prismatic cells with capacity loss of only 14% after
6000 charge–discharge cycles [21], where the cells were cycled at
20◦C and around 1C rate. However, high-temperature cycling sig-
nificantly accelerated capacity fading [22]. Amine et al. reported that there was little capacity fade at 25◦C, but approximately 70% capacity loss at 55◦C after 100 charge–discharge cycles at C/3 rate [22]. The fast fading at high temperatures was found to result from formation and growth of thick interfacial film and concomitant large impedance rise on the graphite anode which was catalyzed
by iron deposition on the graphite anode subsequent to iron disso-
lution from the LiFePO4 cathode."



Cycling degradation



https://www.youtube.com/watch?v=MUg9W4CbZUQ&list=PLwuOmXF4g0NL0JrB-ouTlkr_o6ZtUEf8b&index=4

Inside a Lithium Ion Electric Car Battery Cut Open by EV West

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https://www.youtube.com/watch?v=-x8soJCDJg0&index=13&list=PLwuOmXF4g0NL0JrB-ouTlkr_o6ZtUEf8b


Electric car upgrade part 2 - Batteries and Busbars


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Evolution of electric vehicle battery technology | TÜV SÜD
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EV Basics Calculating Battery Pack Size

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