Intelligent vehicular lithium battery charger

Abstract

The invention discloses an intelligent vehicular lithium battery charger. The intelligent vehicular lithium battery charger comprises a starting unit, a measurement unit, a calculation unit, a control unit and an output unit and is characterized in that the starting unit comprises a soft starting circuit, a rectifying and filtering circuit, a power factor compensation circuit, a resonant switching circuit and an auxiliary power supply circuit; the measurement unit comprises a charge state detection circuit, a voltage and current sampling circuit and a temperature acquisition circuit; the calculation unit comprises a micro-processor and an LCD (Liquid Crystal Display); the control unit comprises a PWM (Pulse-Width Modulation) controller and a keystroke input circuit; and the output unit comprises the rectifying and filtering circuit and an anti-reverse output circuit. A feedback control system is adopted in the charging system; therefore, over-current, over-voltage and over-heat phenomena in the charging process can be effectively avoided; simultaneously, instant charging voltage and current can be given by the micro-processor according to battery parameters provided by a battery manufacturer; an optimized charging scheme is realized; the charging equilibrium is good; and thus, the service life of a battery is prolonged easily.

Description

Technical field [0001] The invention relates to the technical field of charging management, in particular to an intelligent lithium battery vehicle-mounted charger. Background technique [0002] Since its invention, lithium batteries have the advantages of high single-cell working voltage, small size, light weight, high energy density, long cycle life, low self-discharge current, no memory effect, no pollution and high cost performance. In recent years, with the continuous expansion of the application field of lithium batteries, the output is also developing rapidly, and it has become a high-tech product of great significance in the 21st century. Since the discharge curve of lithium batteries is very flat and can produce stable power during the entire discharge period of the battery, lithium batteries have become the first choice for vehicle power batteries. However, as the endurance of electric vehicles continues to expand, the capacity of lithium batteries has been increased a...

AI Technical Summary

Problems solved by technology

However, with the continuous expansion of the battery life of electric vehicles, the capacity of lithium batteries has been increased as much as possible; at the same time, the disadvantages of lithium batteries are also very obvious, that is, they are relatively "delicate" and have strict requirements on temperature, current and voltage, so different types Lithium batteries with different capacities often need different chargers for matching. If the battery chargers are not well matched, unsafe phenomena such as overcharging and overheating will occur, which will affect the normal use of the battery and shorten the life of the battery. If you are not careful, there will be It may lead to battery damage, scrapping, or even burning, explosion and other dangers, resulting in serious loss of life and property

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