There are two types of lead-acid batteries and lithium batteries on the market today, and these two types of chargers cannot be mixed, or the batteries will be directly scrapped. Because the charging mode of lithium battery charger and lead-acid battery charger is not the same. Lithium battery is constant current and constant voltage charging, lead-acid is a three-stage charging.
Lithium battery charging control is first in accordance with the steady current charging, and then when the battery voltage rises to 4.2V voltage will no longer rise, the charger to detect the current, assuming that the current is less than a certain value to finish charging. The lithium battery is active to overcharge, so the protection circuit is messy. For a single nominal 3.6V lithium battery maximum charge voltage rating of 4.2V, the upper limit of the promised fault is not more than 1%.
Lead-acid batteries, the aspirational charging current is pulsed, pulse charging to the mains 50-60HZ power supply we use direct rectification without filtering the best pulsating DC charging, because the self-discharge rate of lead-acid batteries is relatively large, the choice of industrial frequency charging, generally with a stable voltage charging method.
1. Li-ion battery charger adapted to the implementation of constant current and constant voltage, because of the small internal resistance of lithium, the standard in the design of the charger to ensure constant current in the first place, regardless of the lack of lithium to what low power, charging can only output nominal, which is the limit of constant current; and lead-acid batteries are not so delicate, electric vehicles with the car with the appropriate charger, it can use pulse charging, divided into three sections, constant current and constant voltage trickle charging.
2. Li-ion battery has higher requirements for the charger and needs protection circuit, so Li-ion battery chargers usually have high control precision and can charge Li-ion battery with constant current and voltage; lead-acid battery charger has wide range of charging voltage and battery capacity, power saturation anti-overcharge, short-circuit automatic protection, high safety factor, small heat, high efficiency and no damage to the battery.
3. Li-ion battery charger in the state of nickel-metal hydride or nickel-cadmium batteries to charge lithium batteries, the battery will not be fully charged greatly shorten the working time; if the charger in the state of nickel batteries to charge lithium batteries, lithium batteries will be overcharged seriously affect the service life of the battery; lead-acid battery charger is not afraid of short circuit and misconnection, short circuit, overload, overcurrent, automatic reverse protection, a very high safety factor, low thermal efficiency, and Fully protect the normal use of the battery, not damaged by the quality of the charger.
4. Li-ion battery charger is specially used to charge lithium-ion batteries; lead-acid battery charger can be used for motorcycle, electric car, car 12V/1Ah-28Ah battery, battery charging, is designed for small lead-acid battery charger.
The advantages and disadvantages of lithium and lead-acid batteries are as follows
Cycle life: lithium battery 1200-2000 times, lead-acid battery 500-900 times.
Specific energy: 150W-h/kg for lithium-ion batteries and 40W-h/kg for lead-acid batteries.
Volume: the volume of lithium battery is 2/3 of the volume of lead-acid battery.
Weight: lithium battery is light, only 1/3 to 1/4 of lead-acid battery.
Price: lithium battery is higher, price of 24V/10Ah: 750 to 1200 RMB, lead-acid battery is lower, price of 24V/12Ah: 200 to 300 RMB.
Charging and protection: lithium-ion battery protection costs are high and messy, lead-acid battery protection costs are low briefly provided by the open circuit.
The above is the difference between lithium battery chargers and lead-acid battery chargers and the advantages and disadvantages of lithium and lead-acid batteries. Therefore, in the matter of charging the battery, we must choose a special charger to the corresponding battery's charging, to avoid mixing with each other, out of line safety hazards or accidents.
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