Polymer batteries are also a type of lithium-ion battery, but compared with liquid lithium-ion batteries (Li-ion), they have many obvious advantages such as higher energy density, smaller size, thinner profile, lighter weight, higher safety, and lower cost, making them a new type of battery.
The charging current and charging voltage of polymer lithium-ion batteries must not exceed the following standards. Exceeding the specified values may damage the charging and discharging performance, mechanical properties and safety of the battery cell, and may even lead to overheating and leakage.
Polymer lithium-ion battery chargers must be able to perform constant current and constant voltage charging;
The charging current of a single battery cell must be below 1C5A during charging;
The charging temperature range is 0~+45℃;
The voltage during charging must not exceed 4.23V.
The charging and discharging processes for polymer lithium-ion batteries and liquid lithium-ion batteries are essentially the same. There are two main methods: constant voltage charging and constant current charging, which can also be used interchangeably. In constant current charging, as the capacity of the lithium-ion battery increases over time, the battery's internal resistance also increases, making charging slower. At this point, don't assume charging is complete; it still needs to continue for a period of slow charging.
Typically, polymer lithium-ion battery manufacturers use a constant current charging method followed by a constant voltage current charging method. The current, voltage, and battery level all change over time, ensuring the battery can be fully charged quickly.
