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Amperex Technology Limited
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3. Discharging
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3.1 Discharging current
The cell shall be discharged at less than the maximum discharge current specified in the Product Specification.
High discharging current may reduce the discharging capacity significantly or cause over-heat. |
3.2 Discharging temperature
The cell shall be discharged within the temperature range specified in the Product Specification. |
3.3 Over-discharging:
It should be noted that the cell would be at an over-discharged state by its self-discharge characteristics in case the cell is not used for long time. In order to prevent over-discharging, the cell shall be charged periodically to maintain between 3.7V and 3.9V.
Over-discharging may causes loss of cell performance, characteristics, or battery functions.
The charger shall be equipped with a device to prevent further discharging exceeding a cut-off voyage specified in the Product Specification.
Also the charger shall be equipped with a device to control the recharging procedures as follows:
The cell battery pack shall start with a low current (0.01C) for 15 - 30 minutes, i.e. pre-charging, before rapid charging starts. The rapid charging shall be started after the individual cell voltage has been reached above 3V within 15 - 30 minutes that can be determined with the use of an appropriate timer for pre-charging.
In case the individual cell v4oltage does not rise to 3V within the pre-charging time, then the charger shall have functions to stop further charging and display the cell/pack is at abnormal state.
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