Lithium battery is a general name. The lithium-ion battery used in mobile phones has a rated voltage of 3.6V and 3.7V, the end-of-charge voltage is mainly 4.2V and 4.3V, and the protection voltage is low. voltage is mainly 4.2 V and 4.3 V. 3.3 V and 3.2 V.
Relevant knowledge:
1. The minimum discharge termination voltage for lithium-ion batteries is typically: 2.75 V. Lower than this voltage can easily result in a significant decrease in battery capacity or. even disposal.
2. According to Article 1, the production of lithium-ion batteries requires protection circuits to prevent the battery from being over-discharged.
3. The working voltage of the lithium iron phosphate battery is 3.26V, and the low-voltage protection voltage is 2.5V.
Remember that the minimum protection voltage of the protection cardlithium battery is 2.4 volts, so 2.4 volts is the over discharge voltage.
However, in practice, the minimum battery voltage is not placed at 2.4 volts, but at around 3 volts. At the same time, the low battery prompt of mobile phones and other devices has been increased from 10% to 20%, which shows a very important problem, that is, too low battery will cause more serious damage to batteries lithium than we imagined.
I personally believe that most chargers and charge management outputs are equipped with capacitors. When empty, there is a voltage of approximately 5 volts on the capacitor. 2 The lower the battery voltage, the higher the instantaneous high current that can occur when charging is activated. 3Due to the existence of the protection board, this large current may damage the relevant protection components.