Patent Information

Abstract

Abstract: This invention designed for charging a 3.7V battery 1. It employs a constant current charging method. Here's a breakdown of the circuit's components: LM317 voltage regulator 2 that ensures a steady and adjustable voltage supply to the charging system; 10k Resistors 3 are employed in the feedback loop of the LM317 and play a key role in determining the charging current; TL431 4 acts as a precise voltage reference, effectively setting the voltage at which the battery will be charged; BD140 transistor 5 functions as a switch, regulating the flow of charging current; D1, D2, D3, D4 diodes 6 are used for voltage reduction and to safeguard the LED[ 330 Resistor is to limits the current flowing through the LED 7. The LED 7 illuminates when the charging process 8 is active, providing a visual indicator 9.

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