Intelligent charger for zinc-nickel battery and battery pack

Abstract

The invention provides an intelligent charger for a zinc-nickel battery and a battery pack. The charger comprises a control unit, a charging switch unit, a direct-current voltage stabilizing unit, anauxiliary power supply unit and a storage battery. The charging switch unit is electrically connected with the direct-current voltage stabilizing unit; the charging switch unit, the auxiliary power supply unit, the storage battery and the control unit are all electrically connected; and an output voltage of the direct-current voltage stabilizing unit is regulated by the charging switch unit to provide a required voltage for the storage battery, the control unit is used for controlling charging and discharging of the storage battery, and the auxiliary power supply unit is used for providing a power supply for the control unit. Advantages of a high charging speed, high efficiency and a low battery temperature rise are achieved.

Description

technical field [0001] The invention relates to the technical field of chargers, in particular to an intelligent charger for zinc-nickel batteries and battery packs. Background technique [0002] Zinc-nickel batteries are composed of zinc electrodes and nickel electrodes, and have the superior performance of the extremely high capacity of the zinc anode of the zinc-silver battery and the long life of the nickel cathode of the cadmium-nickel battery. In terms of performance, zinc-nickel secondary batteries have the advantages of large capacity, high specific energy, good safety, high working voltage, no memory effect, excellent low temperature performance, high current and fast charge and discharge, etc. The environment does not produce pollution, which belongs to "green battery". [0003] Zinc-nickel batteries are generally charged in the constant current to constant voltage mode. During the constant voltage charging stage, the current gradually decreases until it reaches t...

AI Technical Summary

Problems solved by technology

[0003] Zinc-nickel batteries are generally charged in the constant current to constant voltage mode. During the constant voltage charging stage, the current gradually decreases until it reaches the cut-off current and stops charging. However, as the service life of the battery increases, the electrolyte inside the battery will be redistributed. consumption, the internal resistance of the battery will increase, the charging polarization will increase, the charging efficiency will decrease, and the gas generated by the positive electrode will increase. During the constant voltage charging process, due to the temperature rise of the battery, the voltage drops, and the charging current increases, the current cannot continue to drop to the control point of the cut-off current, which will cause the battery to overcharge.

[0004] Due to the simple structure of the traditional battery charger, the charging control is realized by analog control, so the charging method is single, and the charging method cannot be adjusted according to the state of charge of the battery, and there is no function of monitoring and protecting the charging process of the battery, which cannot meet Battery Charging in Unattended Locations

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