Limit voltage circuit using light emitting diodes as thermal-loss reducing impedances, especially for matching a saturation voltage of rechargeable cells during charging

摘要

A variable resistance limit voltage circuit system for application to various types of circuit uses light emitting diodes as impedances to limit thermal losses as well as to provide display functions. The system is particularly suitable for use in a charging circuit for a rechargeable cell, ensuring fully saturated charging of the rechargeable cell while preventing the rechargeable cell from being damaged by overcharging, reducing thermal loss in the limit voltage circuit, and providing a light emitting display of charging status as required.