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Due to the fact that UPS lead-acid battery chargers are generally set to a two-stage or three-stage charging mode, the voltage levels of lithium-ion batteries and lead-acid batteries do not match. There are also many types of lithium-ion batteries, and the performance of UPS power supply batteries and battery protection board parameters may vary. Therefore, lithium-ion batteries are not the same as lead-acid batteries, as they have universal battery chargers. Generally speaking, lithium-ion batteries are shipped with a dedicated charger. To protect lithium-ion batteries, a dedicated charger is required.

In order to overcome the large internal resistance of lead-acid, the lead-acid battery charger increases the charging voltage by about 5% during constant current charging. This means that when you choose the same voltage charger to power the lithium-ion battery, the voltage will be slightly higher. Due to the large internal resistance of lead-acid, constant current charging increases the constant voltage voltage during constant current charging to achieve efficiency, which is very unfavorable for lithium-ion batteries.

The internal resistance of lithium-ion batteries is small. For example, 13 series lithium-ion batteries are 48 volts, and the cutoff voltage should be controlled at 54.6 volts, while the constant current cutoff voltage of lead-acid batteries is 57.9 volts, several volts higher. Of course, if the UPS lead-acid battery is improved, it can be used to charge lithium-ion batteries, such as removing the low constant voltage stage circuit and pulse circuit.

The charging control method of lead-acid batteries is completely different from that of lithium-ion batteries, and the voltage may also vary greatly. Do not use them incorrectly. The individual voltage of lead-acid UPS batteries is 2V, and a suitable charger should be selected based on the voltage.

The individual voltage of a lithium-ion battery is 3.63.7V. The 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 if it is less than a certain value, it ends charging. Input voltage: 100-240V, input frequency: 50-60HZ, single battery charging voltage: 4.2V.

A lithium-ion battery charger is a charger specifically designed for charging lithium-ion batteries. Lithium ion batteries have high requirements for chargers and need to protect the circuit. Therefore, lithium-ion battery chargers usually have high control precision and can charge lithium-ion batteries with constant current and voltage. The working selection of the charger should be consistent with the charged pool. If the charger operates in a lithium-ion battery state and charges nickel hydrogen or nickel cadmium batteries, the battery will not be fully charged, which will greatly reduce working time.

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