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Why are lead-acid batteries and lithium battery chargers not compatible? At present, there are two types of chargers on the market: lead-acid batteries and lithium batteries. These two types of chargers cannot be mixed, otherwise the batteries will be directly scrapped. Can lithium battery chargers be compatible with lead-acid chargers. The answer is simple, definitely not possible. Do not mix chargers for lead-acid and lithium batteries. The charger should be designed specifically for the vehicle, and the type of battery should be matched with the charger.

Why are lead-acid batteries and lithium battery chargers not compatible?

If the voltage is the same, lithium batteries can be charged with lead-acid batteries, but lead-acid batteries cannot be charged with lithium batteries because lithium batteries have higher safety requirements. The charging control method of lead-acid batteries is completely different from that of lithium batteries, and the voltage may also vary greatly. Do not use them incorrectly.

The individual voltage of lead-acid batteries is 2V (common specifications for battery packs include 6V, 12V, 24V, etc.), and a suitable charger needs to be selected based on the voltage.

The individual voltage of a lithium battery is 3.6-3.7V. The charging control is to first charge it with a constant current, and then when the battery voltage rises to 4.2V, the voltage no longer rises. The charger detects the current and ends charging if it is less than a certain value. Input voltage: 100-240V, input frequency: 50-60HZ, single battery charging voltage: 4.2V.

Lithium ion battery charger is a charger specifically designed to charge lithium-ion batteries. Lithium ion batteries have high requirements for chargers and need to protect circuits, so lithium-ion battery chargers usually have high control precision and can perform constant current and constant voltage charging on lithium-ion batteries.

1. The voltage of a regular lead-acid battery charger is too high. Taking a 36V charger as an example, the lowest charging voltage for a lead-acid battery charger is 41.4v-44.xV. Lithium batteries must not exceed 42.5V, otherwise the battery will end its life prematurely or explode.

2. The constant current and constant voltage charging characteristics of lithium-ion batteries only require a two-stage charging device. Lead acid three-stage charging is not suitable for lithium-ion batteries.

3. Fast charging stations on the street are absolutely not allowed to charge lithium batteries, only suitable for lead-acid batteries.

4. Lead acid charging causes overcharging of lithium batteries. The internal protection board of lithium batteries will strike.

Summary: In theory, there is no problem with direct current relative charging. But if the performance data of the battery is poor, it is different. So we need to be rigorous. Simply put, charging lead-acid batteries with lithium batteries will result in undercharging. Lead acid charging and lithium charging can lead to overcharging.

Reasons why lithium battery chargers cannot charge lead-acid batteries

It is generally not recommended to use it this way. Although a charger without pulse function can theoretically charge the battery, it may still harm the battery. Although the battery has a protection board that can provide protection during overcharging or overdischarging, if the overcharge protection voltage is frequently triggered during charging, the output voltage setting of this charger will be incorrect.

Due to the fact that lead-acid battery chargers are generally set to two-stage or three-stage charging modes, the voltage levels of lithium batteries and lead-acid batteries are not matched. There are also many types of lithium batteries, and their performance and protection board parameters may vary. Therefore, lithium batteries do not have universal battery chargers like lead-acid batteries. Generally speaking, batteries are equipped with a dedicated charger when they leave the factory. To protect the battery, a dedicated charger is required.

Lithium battery:

Lithium battery charging control is to first charge according to a constant current, and then when the battery voltage rises to 4.2V, the voltage no longer rises. The charger detects the current and ends charging if the current is less than a certain value. Lithium batteries are sensitive to overcharging, so the protection circuit is complex. The maximum charging rated voltage for a single battery with a nominal voltage of 3.6V is 4.2V, with an allowable error limit of no more than 1%.

Lead acid battery:

The ideal charging current for lead-acid batteries is pulse charging. Pulse charging is best achieved by directly rectifying the 50-60Hz mains power supply without filtering the pulsating DC charging (this is based on the practice of simple circuit and low cost). Due to the high self discharge rate of lead-acid batteries, constant voltage charging is generally used when using power frequency charging.

Lead acid batteries and lithium battery chargers cannot be mixed. Lead acid battery chargers use three-stage charging, which has excellent quality, good performance, high charging saturation, and can improve the service life of batteries. Lithium ion battery charger is a charger specifically designed to charge lithium-ion batteries. Lithium ion batteries have high requirements for chargers and need to protect circuits, so lithium-ion battery chargers usually have high control precision.

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