Method for correcting electric quantity calculation of battery pack

Abstract

The invention discloses a method for correcting electric quantity calculation of a battery pack. A circuit control system comprises an MCU correction module, a multipath comparator circuit, an NAND gate control circuit, a coulometer module, a battery pack protection module and a battery pack, wherein the battery pack protection module comprises the functions of balancing, over-discharging, over-charging, short-circuit protection and the like; the coulometer module is mainly used for calculating the electric quantity flowing through a sampling resistor of the protection module; the multipath comparator circuit is mainly used for awakening the MUC module when the protection module starts the balancing function and controlling the NAND gate control circuit when the balancing function is completely started to shunt charge current of a balancing circuit, so that one part of charge current does not flow through the sampling resistor of the coulometer module; and the MCU module is mainly used for correcting more electric quantity, consumed by a discharging resistor in the balancing circuit, calculated by a coulometer when the battery pack protection module starts the balancing function. According to the method for correcting the electric quantity calculation of the battery pack, the estimation accuracy of the electric quantity of batteries can be greatly improved, so that the electric quantity of the batteries can be fully developed and utilized.

Description

technical field [0001] The invention relates to the application field of multi-section battery packs, in particular to a method for correcting battery pack power calculation. Background technique [0002] With the continuous development of science and technology, people are using batteries more and more widely, such as portable devices such as field mobile batteries, mobile chargers, camcorders and digital cameras. Moreover, during the use of batteries, people often combine single-cell batteries into battery packs of various volumes and capacities to meet the long-term running needs of machines or equipment. People are also eager to know the remaining power of the battery pack. In order to estimate the use time of the machine or equipment. [0003] At present, there are mainly two methods to measure battery power in the application of battery products, which are mainly divided into voltage method and coulomb counting method. The voltage method is mainly to estimate the rem...

AI Technical Summary

Problems solved by technology

The voltage method is mainly to estimate the remaining capacity of the battery based on the voltage of the battery. This method has poor accuracy and cannot cope with the sudden increase and decrease of the battery voltage. It has gradually withdrawn from the market.

Images