Lithium battery protection board balanced charging method

Power lithium battery with groups, each section lithium battery take charge over voltage, discharge under voltage, over current, short circuit protection, in order to realize the whole charging process battery equalizing charge, with one section introduces a lithium battery protection chip for any number of series group including equalization charging of lithium battery protection function of battery protection board design.The simulation results and industrial application prove that the protection plate protection function is perfect, stable work, high cost performance, equalizing charge error is less than 50 mv.

Commonly used equalization charging technology including constant shunt resistance balanced charge, on and off shunt resistance equilibrium, average battery charging voltage equilibrium charging type, switch capacitance equalizing charge, step-down converter equalization charging and inductance equalizing charge, etc.Groups of series rechargeable lithium-ion batteries, battery equalizing charge should guarantee every day, or in use process will influence the whole performance and life of the battery.While the existing single section lithium battery protection chip contains no equalizing charge control function, multiple class lithium battery protection chip equalization charging control function need external CPU;Through and protect the chip serial communication (e.g., I2C bus), increased the complexity of the protection circuit and the design difficulty, reduces the efficiency and reliability of the system, increases the power consumption.

Power group use lithium battery, charging the lithium batteries are required over voltage, discharge under voltage, over current, short circuit protection, in order to realize the whole battery equalization charging in the process of charging problem, with one section introduces a lithium battery protection chip for any number of series group including equalization charging of lithium battery protection function of battery protection board design.The simulation results and industrial application prove that the protection plate protection function is perfect, stable work, high cost performance, equalizing charge error is less than 50 mv.

Lithium battery pack protection board equilibrium principle of charging structure

Single section, number of lithium battery protection chip based on lithium battery cell, used in series, respectively to the section that corresponds to a single lithium-ion battery state of charge and discharge, over current, short circuit protection.The system in the charging protection at the same time, through the protection chip control discharge branch switch on and off to achieve equalization charging device, which is different from the traditional approach in the charger end realize equilibrium, reduce the cost of the lithium battery charger design application.

The page contains the contents of the machine translation.