Can the DC stabilized power supply be used as a charger for lithium batteries?

Can the DC stabilized power supply be used as a charger for lithium batteries? The answer is no.

Lithium-ion batteries have higher requirements on chargers. Lithium-ion battery manufacturers should reserve hydrogen-based batteries in the initial charging mode. In theory, the smaller the charging current, the more advantageous the battery is, but it takes too long and is not practical. The low rate charge specified by China's national standard is 0.2C (C is the battery capacity). The battery voltage gradually increases with the charging process. When the battery terminal voltage reaches 4.2V, it is necessary to reserve the power supply and use the lithium battery price to change the constant current charging to constant voltage charging. The continuous charging current with the constant voltage charging process is gradually reduced, and when the reserve power supply lithium battery supplier is reduced to 0.01 C, the charging is considered to be stopped.

Because the lithium-ion battery has a nominal voltage of 3.7V and a charge cut-off voltage of 4.2V, there is a significant difference. Therefore, a constant-voltage power supply cannot be used for a constant-voltage power supply. The current must be too large at first, or the current at the back may be too small. If the voltage of the regulated power supply is low, although the starting current is not large, it will be full of charge; if the adjustment is higher, the battery voltage is too low and the voltage difference is too large to present the charging current during the initial charging phase. Large drawbacks greatly shorten the battery life; if the output voltage accuracy is poor, the voltage exceeds the 4.2V upper limit, it will overcharge, seriously damage the battery.

In addition, the regular charger also has: additional temperature control during the charging process; LED charging status indication; battery abnormal status detection and other additional circuit functions.

Therefore, it is necessary for the DC stabilized power supply to charge the lithium battery through a dedicated constant voltage and constant current control circuit.

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