charger for all battery types
The charger circuit described is designed to accommodate various battery types, with a specific focus on lithium batteries. The core components include the LM317T voltage regulator, which is utilized for its ability to provide a stable output voltage necessary for charging lithium cells. The ICL7665 integrated circuit serves as a supervisory device, monitoring the voltage levels to prevent overvoltage and undervoltage conditions that could potentially damage the battery or reduce its lifespan.
The charging process is initiated with a constant current of 60 mA, which is optimal for AA lithium cells. This current ensures that the batteries are charged efficiently without overheating. The circuit is designed to automatically terminate the charging process once the cells reach a cutoff voltage of 2.4 V. This cutoff is critical, as exceeding this voltage can lead to safety hazards, including battery swelling or leakage.
In terms of the schematic design, the LM317T is configured in a standard voltage regulator setup, with resistors determining the output voltage. The ICL7665 is integrated into the circuit to provide feedback to the microprocessor, allowing for real-time monitoring of the battery's voltage status. The microprocessor can then control the charging process, ensuring that the current remains constant until the cutoff voltage is achieved.
Additional components may include capacitors for filtering and stabilization, as well as protection diodes to prevent reverse polarity connections. The overall design emphasizes safety, efficiency, and adaptability, making it suitable for a wide range of lithium battery charging applications.Charger for All Battery Types power supply. Go to that page to read the explanation about above power supply related circuit diagram. This Lithium batterychargercircuitis dedicatedto chargelithiumbatteries. Ituses 2chips, voltage regulatorLM317TandICL7665warnsmicroprocessors( Ps)ofovervoltageand undervolta geconditions. Charging is completed with a constant current of 60 ma for Aa cells to a cutoff voltage of 2. 4 V per cell, at which point the charge should be terminated. The. 🔗 External reference
Related Circuits
This circuit can be utilized as a replacement for the single current-limiting resistor typically found in low-cost battery chargers. The alternative presented here is advantageous because it prevents the premature failure of nickel-cadmium (NiCd) batteries, which often occur after...
Few years back, I had been working on a project for solar auto lighting. The light will turn on when the solar panel voltage drop below a set point indicating that it is dark. The detection is done by...
A touch-sensing circuit maintains the high-voltage generator in an off state until contact is made with the fence wire. When something touches the fence sensing circuit wire, it activates the high-voltage generator, which delivers a series of 500-microsecond pulses...
The circuit is designed to drive an external load. A fault condition in the external load circuit could feed excessive current or voltage back into the line drive circuit. If excessive voltage appears from the load, the two zener...
Plasma Globes were invented by Nikola Tesla before 1892. Glass-enclosed Tesla coil terminals containing low-pressure gases were part of his effort to develop a new lighting source not covered by Edison patents. The same device became an art object...
Desulfation is the process of reversing sulfation that occurs in a lead-acid battery over time. Desulfation partially restores the battery's ability to hold a charge, which is diminished due to sulfation. Desulfation is a critical maintenance procedure for lead-acid batteries,...