Tag: Battery Charger

Ni Cad batteries can be charged at high current rates because it allows short charge time. But, it has difficulty in operations such as excessive internal heating degrades the batteries and can cause gas venting to the outside atmosphere. Because cell voltage is not necessarily indicative of the charge state of the battery , schemes based on monitoring cell voltage […]

All of the necessary circuitry to optimally control the charge and hold cycle for sealed lead acid battery can be implemented using  UC2906 series of battery charger controllers.  These integrated circuits monitor and control both the output voltage and current of the charger through three separate charge states; a high current bulk-charge state, a controlled over-charge, and a precision float-charge, […]

More efficient lead acid battery charger can be implemented using switch mode circuit. A switch mode for lead acid battery charger can be constructed using bq24105 battery charger controller. The bq24105 was originally designed to charge single-, two- or three-cell Li-ion and Li-polymer battery packs. Its features doesn’t include the control for lead acid battery charger termination. Here we add […]

This battery charger circuit use a flyback converter topology, and implements a current-limited power supply to charge lead-acid batteries.  Here is the schematic diagram of the charger circuit: The flyback transformer provide isolation and voltage input range flexibility, event at supply voltage lower that the battery voltage. Monitoring the charging current is done by sensing the output using MAX471 current […]

The Battery Charger Circuit This lead acid battery charger circuit design is very simple and smart.  I call it a smart battery charger design because it uses only few components to support many features.  Here is the schematic diagram of the circuit: This circuit is suitable for a general purpose lead acid battery charger, or for a charger modul that […]

A constant-current/constant-voltage linear charger for single-cell lithium-ion (li-ion) can be constructed using only a tiny battery charger controller chip EUP8054 and a few passive components. This tiny integrated circuit chip is suitable for various portable devices. This controller chip is also compatible with USB power specification, ideal for charging the battery when the device is plugged to USB port. Here […]

This charger circuit is suitable for lead-acid battery, including flooded, gel, and AGM types. The automatic term means that this charger will stop charging automatically when the battery voltage reach a certain pint, indicating that the battery has been fully charged, and charging will be restarted if the battery voltage falls below that threshold. A LED indicator is provided to […]