What is over-discharge? What are impacts on cell performance?
If a cell’s voltage reaches a designed value, that means the battery has dischargethe stored capacity, but still the discharge action is continual, over-discharge will cause. Commonly the end voltage can be identified through discharge current, for example the end voltage is set at 1.0V/cell as discharged at 0.2C-2C, and 0.8V/cellat 3C or more, e.g. 5C or 10C. Overdischarge may cause disaster, especially atheavy current or repeated overdicharge. Commonly overdischarge can make cell inner pressure raise, and the reversibility of activity materials both in positive and negative will be damaged. Even by charge only part can recover and the capacity isreduced obviously.
