Difference between lithium battery charger and lead-acid charger

These two types of chargers cannot be mixed, or the battery will be directly scrapped. Because the charging modes of the lithium battery charger and the lead-acid battery charger are different. Lithium ion battery is charged with constant current and constant voltage, and lead-acid is charged in three stages.

The charging control of lithium-ion battery is to charge according to the safe current first, and then when the battery voltage rises to 4.2V, the voltage will not rise. The charger detects the current, and the charging is completed assuming that the current is less than a certain value. Lithium battery is overcharged and flexible, so the protection circuit is messy. The maximum charging rated voltage of a single nominal 3.6V lithium ion battery is 4.2V, and the allowable upper limit of fault is not more than 1%.

For lead-acid batteries, the charging current of ambition is pulse type. Pulse charging is the best way to use the pulse DC charging with 50-60Hz mains power supply which is directly rectified and unfiltered. Because the self discharge rate of lead-acid batteries is relatively large, the safe and stable voltage charging method is generally used when power frequency charging is selected.

The charger suitable for lithium-ion battery adopts constant current and constant voltage. Because the internal resistance of lithium battery is small, the constant current shall be ensured in the design standard of charger. No matter what low power the lithium battery lacks, it can only output nominal power during charging, which is the limit of constant current; The lead-acid battery is not so delicate. The electric vehicle is equipped with an appropriate charger. It can use pulse charging, three-stage charging, constant current constant voltage trickle charging.

Lithium ion batteries have high requirements for chargers and need to protect circuits. Therefore, lithium ion battery chargers usually have high control precision and can charge lithium ion batteries at constant current and constant voltage; The lead-acid battery charger has a wide range of charging voltage and battery capacity, anti overcharge of electric saturation, automatic short-circuit protection, high safety factor, small heat, high efficiency, and no damage to the battery.

The lithium-ion battery charger charges the lithium-ion battery in the state of nickel hydrogen or nickel cadmium battery, and the battery will not be fully charged, greatly reducing the working time; If the charger charges the lithium-ion battery in the state of nickel battery, the lithium-ion battery will overcharge and seriously affect the service life of the battery; The lead-acid battery charger is not afraid of short circuit and wrong connection, short circuit, overload and overcurrent. It is fully automatic reverse connection protection, with high safety factor and low thermal efficiency. It fully protects the normal use of the battery and will not be damaged due to the quality problem of the charger.

Lithium ion battery charger is a charger specially used to charge lithium ion batteries; The lead-acid battery charger can be used for charging 12V / 1ah-28ah batteries and batteries of motorcycles, electric vehicles and automobiles. It is specially designed for small lead-acid batteries.

The charging control of lithium-ion battery is to charge according to the constant current first, and then when the battery voltage rises to 4.2V, the voltage will not rise. The charger detects the current, and ends the charging if the current is less than a certain value. Lithium battery is sensitive to overcharge, so the protection circuit is complex. The maximum charging rated voltage of a single nominal 3.6V battery is 4.2V, and the upper limit of allowable error is not more than 1%.

The ideal charging current of lead-acid battery is pulse type. Pulse charging is the best pulse DC charging which is directly rectified and unfiltered by the 50-60Hz power supply. Since the self discharge rate of lead-acid battery is relatively large, the constant voltage charging mode is generally used when power frequency charging is adopted.

The lead-acid battery charger organically combines the high-frequency switching power supply technology with the embedded microcomputer control technology, and uses the intelligent dynamic adjustment technology to optimize the charging characteristic curve and effectively extend the service life of the battery. It adopts four stages of constant current / W stage / constant voltage / small constant current charging mode, which is characterized by high charging efficiency, high reliability, simple operation, light weight and small volume.