The lithium battery charger is the life of our most common battery charger, and even some people according to it lithium batteries and the same compact shape called "button battery charger", at present for the lithium battery charger charging method there are still a lot of misunderstandings, but today, the engineers of the UE can give you a general introduction to the advantages and disadvantages of lithium battery charger and the ordinary charger can be charged with lithium batteries.
The lithium battery charger is a charger specifically designed for charging lithium batteries, Lithium batteries have higher requirements for chargers, and need to protect the circuit, so lithium battery chargers usually have a high degree of control precision, able to charge lithium batteries with constant current and constant voltage. Lithium battery charger with short circuit, battery polarity reversal, over-current and over-voltage protection, low-power sleep mode when the supply voltage is low, the battery leakage current is very small;
Advantages: high working voltage, small size, light weight, high energy, long life, safe and fast charging, wide range of permissible temperature, small discharge current, no memory effect, no environmental pollution.
Disadvantages: no interchangeability with dry batteries, no fast charging, high internal impedance, large changes in operating voltage, large discharge rate, fast capacity decline, unable to discharge large currents.
Can ordinary chargers charge lithium batteries?
Ordinary chargers can't charge lithium batteries because ordinary battery chargers are usually set to two-stage or three-stage charging mode, and the voltage levels of ordinary batteries and lead-acid batteries are not matched. There are many kinds of lithium batteries, the battery performance and battery protection plate parameters may be different, so lithium batteries are not like ordinary batteries, there is a universal battery charger. Generally speaking, lithium batteries are equipped with a special charger at the factory. In order to protect the lithium battery, you need to use a special charger.
Ordinary charger voltage is too high and current is too large to meet the charging conditions of lithium batteries. 11V lithium battery charging termination voltage should be 12.5V, and the charging current range should be 0.1 to 1.5 times the capacity of lithium batteries, in order to extend the life of the battery, you can generally use 0.1 times better, 0.5 times can be charged quickly.
Li-ion battery charging control is to charge according to a constant current first, then when the battery voltage rises to 4.2V, the voltage will no longer rise, the charger detects the current, if the current is less than a certain value to end the charging. Li-ion batteries are sensitive to overcharging, so the protection circuit is complex. For a single nominal 3.6V battery maximum charging rated voltage of 4.2V, the upper limit of the allowable error is not more than 1%.