Doctorbass
100 GW
For some of us, the winter season is at our doors and some of us will store theor ebike for few months,
I though that it could be good for you to know some great advices about this and you lithium ion battery.
That mostly concern peoples that store their bike for couples of months for that cold season.
I'm sure that many of us already heard that keeping a battery fully charged will help to keep it's long life and prevent loosing capacity and other dammages. This is particularrly thru with SLA and most of the NiCad battery.
But!.. for the lithium this is something different!!
Lithium cells will not lose the same amount of charge like sla and nicad do.
Here is what is HIGHLY remommanded:
0-Avoid to keep them at 4.20V or 3.7V(LiFePO4) for a long period and in a warm or hot environment!!
1-Store your battery to around 40-50%state of charge (generally it's equivalent to 3.7-3.8V per cells for the normal 4.2V 100%soc lithium for the A123 / LiFePO4 is different and it's 3.05-3.10V
2- Store them in a cold area. Usually around 15 degreeC is perfect but below 25 degreeC and above freezing point.
3-If stored for more than one years.. (it's a rare situation for us i guess...) One a year, fully charge them to 4.2V or 3.7V(for LiFePO4) and then discharge them to their storage voltage mintionned above.
4- Ensure that they will never go below 2.5V during this period.
Here is some references about that: http://www.batteryuniversity.com/parttwo-34.htm
Doc
I though that it could be good for you to know some great advices about this and you lithium ion battery.
That mostly concern peoples that store their bike for couples of months for that cold season.
I'm sure that many of us already heard that keeping a battery fully charged will help to keep it's long life and prevent loosing capacity and other dammages. This is particularrly thru with SLA and most of the NiCad battery.
But!.. for the lithium this is something different!!
Lithium cells will not lose the same amount of charge like sla and nicad do.
Here is what is HIGHLY remommanded:
0-Avoid to keep them at 4.20V or 3.7V(LiFePO4) for a long period and in a warm or hot environment!!
1-Store your battery to around 40-50%state of charge (generally it's equivalent to 3.7-3.8V per cells for the normal 4.2V 100%soc lithium for the A123 / LiFePO4 is different and it's 3.05-3.10V
2- Store them in a cold area. Usually around 15 degreeC is perfect but below 25 degreeC and above freezing point.
3-If stored for more than one years.. (it's a rare situation for us i guess...) One a year, fully charge them to 4.2V or 3.7V(for LiFePO4) and then discharge them to their storage voltage mintionned above.
4- Ensure that they will never go below 2.5V during this period.
Here is some references about that: http://www.batteryuniversity.com/parttwo-34.htm
Doc