1. Charging

The safe working voltage range of lithium battery is 2.8~4.2V, lower or higher than this voltage range, the lithium ions in the battery become very unstable, and even cause accidents. In order to ensure that the battery is in a safe range, a special charger is required. These chargers automatically adjust the charging method according to the current state of the battery.

2. Activate

Before the lithium charger starts charging, it will supply the battery with a small current, and at the same time detect the battery voltage change, and gradually increase the current until the set value. This process can be regarded as an activation or test charge.

3. Constant current and variable voltage charging

The charger charges the battery with a constant current. As the battery voltage increases, the charger increases the charging voltage at the same time to speed up the charging speed.

4. Variable current and constant voltage charging

When the battery reaches the 4.2V cut-off voltage, the battery only charges about 70% (not full) at this time. At this time, the charger continues to charge the battery with a constant voltage and a gradually decreasing current, until the value is less than 0.1A and the battery voltage continues to rise when the battery voltage continues to rise before stopping charging.

The correct charging method of lithium battery

The correct charging method of polymer lithium battery

1. When charging the polymer lithium battery, the charger is recommended to choose the original manufacturer’s special charger, otherwise it will affect or damage the polymer lithium battery.

2. It is recommended to charge the lithium polymer battery in slow charging mode. Try to avoid fast charging. Repeated charging and discharging will also affect the life of the polymer lithium battery.

3. If the mobile phone is not used for more than 7 days, the polymer lithium battery should be fully charged before use. The polymer lithium battery has self-discharge.

4. The charging time of polymer lithium battery is not as long as possible. For ordinary chargers, when the polymer lithium battery is fully charged, the charging should be stopped immediately, otherwise the polymer lithium battery will affect the battery performance due to heat or overheating.

5. After the polymer lithium battery is charged, try to avoid leaving it on the charger for more than 10 hours. If it is not used for a long time, the mobile phone and the polymer lithium battery should be separated.

Precautions for correct charging of lithium batteries

1. Avoid charging at too high temperature

If the lithium battery is used in an environment higher than the specified operating temperature, that is, 35°C or higher, the battery’s power will continue to decrease, that is, the battery’s power supply time will not be as long as usual. If you have to charge the device at such a temperature, the damage to the battery will be even greater. Even if the battery is stored in a hot environment, it will inevitably cause corresponding damage to the quality of the battery. Therefore, keeping the operating temperature as suitable as possible is a good way to extend the life of the lithium battery.

2. Avoid charging at too low temperature

If you use the lithium battery in a low temperature environment, that is, below 4°C, you will also find that the battery life is reduced. The original lithium battery of some mobile phones cannot even be charged in a low temperature environment. But don’t worry too much. This is only a temporary situation, which is different from the use in a high-temperature environment. Once the temperature rises, the molecules in the battery will be heated, and they will immediately return to the previous power.

3. Frequent use

Life is movement. To give full play to the effectiveness of lithium-ion batteries, you need to use it frequently to keep the electrons in the lithium battery in a flowing state. If you don’t use the lithium battery often, please remember to complete a charging cycle for the lithium battery every month and do a battery calibration, that is, deep discharge and deep charge once.