At present, there are two kinds of lead-acid batteries and lithium-ion batteries on the market, and these two types of chargers cannot be mixed, otherwise the battery will be directly scrapped. Because the charging mode of lithium battery charger and lead-acid battery charger is not the same. Lithium-ion batteries are constant current and constant voltage charging, and lead-acid is three-stage charging. The following is an explanation of the difference between lithium-ion battery chargers and lead-acid chargers by lithium-ion battery manufacturers.
Lithium-ion battery charging is a constant current charge, and then when the battery voltage rises to 4.2V, the voltage will no longer rise, the charger will detect the current, assuming that the current is less than the set value and end charging. Lithium batteries are sensitive to overcharge, so charging protection circuits are required. For a single-cell nominal 3.6V lithium-ion battery, the maximum charging rated voltage is 4.2V, and the maximum fault limit is not more than 1%.
The charging current of the lead-acid battery charger is pulse type, pulse charging to the mains 50-60HZ power supply we use directly rectified without filtering pulsating DC charging is the best, because the self-discharge rate of lead-acid battery is relatively large, when choosing power frequency charging, generally use constant voltage charging method.
1. The charger of the lithium-ion battery implements constant current and constant voltage, because the internal resistance of lithium battery is small, and the standard of designing the charger first ensures constant current, no matter what low power the lithium battery lacks, only the nominal output can be output when charging, which is the limitation of constant current; The lead-acid battery is not so delicate, the electric car has an adapted charger with the car, it can use pulse charging, three-stage, constant current constant voltage trickle charging.
2. Lithium-ion batteries have high requirements for chargers and protect circuits, so lithium-ion battery chargers usually have high control precision, and can charge lithium-ion batteries with constant current and constant voltage; Lead-acid battery charger has a wide range of charging voltage and battery capacity, power saturation and overcharge prevention, short circuit automatic protection, high safety factor, small heat, high efficiency, and no damage to the battery.
3. The lithium-ion battery charger charges the lithium-ion battery in the state of nickel-metal hydride or nickel-cadmium battery, and the battery will not be fully charged to greatly shorten the working time; If the charger charges the lithium-ion battery in the state of the nickel battery, the lithium-ion battery will overcharge and seriously affect the service life of the battery; Lead-acid battery charger is not afraid of short circuit and wrong connection, short circuit, overload, overcurrent, automatic reverse polarity protection, extremely high safety factor, low thermal efficiency, fully protect the normal use of the battery, not damaged due to the quality of the charger.
4. Li-ion battery charger is a charger specially used to charge lithium-ion batteries; Lead-acid battery charger can be used for motorcycles, electric vehicles, car 12V/1Ah-28Ah battery, battery charging, is designed for small lead-acid battery charger.