Contents
How much power can a lithium-ion battery hold?
150 watt-hours
A typical lithium-ion battery can store 150 watt-hours of electricity in 1 kilogram of battery. A NiMH (nickel-metal hydride) battery pack can store perhaps 100 watt-hours per kilogram, although 60 to 70 watt-hours might be more typical. A lead-acid battery can store only 25 watt-hours per kilogram.
What are the limits for current and voltage per cell for Li ion batteries?
Most consumer orientated lithium ion batteries charge to a voltage of 4.2 volts per cell and this has a tolerance of around ± 50 mV per cell. Charging beyond this causes stress to the cell and results in oxidation that reduces service life and capacity. It can also cause safety issues as well.
What is the max current of a battery?
Batteries are often specified with a discharge rate in terms of C, where C is the capacity of the battery divided by hours. For example, for a 2Ah battery, C is 2A. If the battery has a maximum discharge rate of 10C, the maximum current is 20 amps.
What should the charge current be on a Li ion battery?
Charge current: The charge current must limited for li-ion batteries. Typically the maximum value is 0.8C, but lower values are more usually set to give some margin. Some faster charging may be possible for some batteries.
What’s the maximum current a battery can charge?
Just because a battery can supply a maximum current of 6A does not mean it can charged with 6A. The maximum charging current of a battery will be mentioned in the datasheet of the battery since it varies based on the battery. Normally it will be 0.5C, meaning half the value of the Ah rating.
What is the nominal voltage of a lithium ion battery?
The nominal voltage rating for all lithium cells will be 3.6V, so you need higher voltage specification you have to combine two or more cells in series to attain it. By default all the lithium ion cells will have a nominal voltage of only ~3.6V.
Is it OK to trickle charge Li ion batteries?
In the fourth and final stage, the constant voltage charging is terminated. Unlike nickel-based batteries, it is not recommended to continue to trickle charge Li-ion batteries, which can cause plating of metallic lithium, a condition that makes the battery unstable. The result can be sudden, automatic and rapid disassembly.