Lithium iron battery heavy current equalization method based on single-chip microcomputer control

Abstract

The present invention discloses a lithium iron battery heavy current equalization method based on single-chip microcomputer control. The method is characterized in that a set of lithium iron battery system is set and comprises at least two series-wound lithium iron batteries, first and second contactors of which the number is equal to that of the lithium iron batteries, a heavy current discharge resistor, a lithium iron battery voltage detection module, a single-chip microcomputer controller and a protection device; the single-chip microcomputer controller obtains the respective voltages of the lithium iron batteries via the lithium iron battery voltage detection module, when the equalization degree between the lithium iron batteries is greater than a set threshold value, the lithium iron battery having the maximum voltage discharges according to the set time and by the heavy current discharge resistor. The method realizes the purpose of the lithium iron battery concentrated heavy current discharge, enables the equalization speed to be accelerated, and is good in equalization effect, low in cost and simple in structure.

Description

technical field [0001] The invention belongs to the technical field of equalization of lithium battery packs, and in particular relates to a large-current equalization method for iron-lithium batteries based on single-chip microcomputer control. Background technique [0002] The development of fuel vehicles has caused a huge consumption of oil resources, the deepening of the global energy crisis, and at the same time aggravated the harm of the greenhouse effect and air pollution. Most countries, governments and automobile companies in the world generally recognize that energy saving and emission reduction is the future development direction of the automobile industry, and the development of electric vehicles will be the best way to solve this difficulty. Electric vehicles have the advantages of low noise, no exhaust emissions, environmental friendliness, high thermal efficiency, low emissions, recyclable utilization, and improved energy structure. Various automobile manufac...

AI Technical Summary

Problems solved by technology

When the capacity of the iron-lithium battery is relatively large, the discharge current of the discharge resistor will hardly meet the requirements of fast equalization

If the power of the discharge resistor corresponding to each iron-lithium battery is increased, its volume and heat dissipation will face new challenges. Existing methods for balancing resistance have few methods for balancing large currents

Images