Battery full cut-off current

What is a cut-off voltage in a battery?

In batteries, the cut-off (final) voltage is the prescribed lower-limit voltage at which battery discharge is considered complete. The cut-off voltage is usually chosen so that the maximum useful capacity of the battery is achieved.

What happens when a battery reaches full charge?

When the battery reaches its full charge cut-off voltage, constant voltage mode takes over, and there is a drop in the charging current. The charging current keeps coming down until it reaches below 0.05C. The battery reaches full charge voltage some time after the CV mode starts (as soon as one of the cells reaches its full charge voltage).

What is the difference between charging voltage and cut-off voltage?

Charging Voltage: This is the voltage applied to the battery during the charging process. For lithium-ion batteries, the charging voltage typically peaks at around 4.2V. Cut-off Voltage: The cut-off voltage is the minimum voltage at which the battery is allowed to discharge during charging. Going below this voltage can damage the battery.

Do batteries have a cutoff value?

Batteries themselves have no cutoff values, managing circuitry around them has. Please edit your question its a little confusing, you can draw a battery to near zero volts if you continue drawing current out of it. Which will kill the battery Lithium, lithium ion (Li+) and lithium polymer (LiPo) batteries all have different characteristics.

How to calculate full charge cut off limit for a 12V battery?

Formula for calculating full charge cut off limit is: Battery voltage rating + 20%, for example 20% of 12V is 2.4, so 12 + 2.4 = 14.4V is the full charge cut off voltage for a 12V battery To know the battery back up time the following formula can be used, which gives you the approximate battery back up time. Backup = 0.7 (Ah / Load Current)

What is the difference between nominal voltage and cut-off voltage?

Nominal Voltage (V) – The reported or reference voltage of the battery, also sometimes thought of as the “normal” voltage of the battery. Cut-off Voltage – The minimum allowable voltage. It is this voltage that generally defines the “empty” state of the battery.