Notes on charging and discharging lithium batteries

by:CTECHi     2021-07-15

Lithium-ion batteries are already a necessity for people’s lives. They must be used correctly to avoid unnecessary dangers. The precautions for the application of lithium-ion batteries are in addition to the non-rechargeable lithium mentioned above.

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You should also pay attention to the following points in charging:

1. Lithium-ion batteries have different types of 4.1V and 4.2V termination charging, so when charging Note that the 4.1V battery cannot be charged with a 4.2V charger, otherwise there will be a risk of overcharging (the charger IC for 4.1V and 4.2V chargers is different!).

2. When charging the battery, the ambient temperature cannot exceed the temperature range listed in the product characteristics table.

3. Cannot charge in reverse.

4. It is not possible to use a nickel-cadmium battery charger (for three nickel-cadmium batteries) to charge a lithium-ion battery (although the rated voltage is the same, both are 3.6V), but the charging method is different, which is easy to cause Overcharge.

Pay attention to the following points in terms of discharge:

1. The discharge current of lithium-ion batteries cannot exceed the maximum discharge current given in the product characteristics table. When the discharge current is large, a higher temperature (energy loss) will be generated and the discharge time will be reduced. If there is no protective element in the battery, it will overheat and damage the battery.

2. The discharge curve is different at different temperatures, as shown in Figure 5. It can be seen from the figure that the discharge voltage and discharge time are also different at different temperatures. The situation is worst when discharging at -20°C.

The promotion of lithium battery industry chain enterprises, lithium grid (li-b.cn) welcomes contributions.

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