ARM control based high current equalization method for lithium manganese oxide battery

Abstract

The invention discloses an ARM control based high current equalization method for a lithium manganese oxide battery. A lithium manganese oxide battery control system is arranged and comprises at least two lithium manganese oxide cells connected in series, first contactors, second contactors, a high current discharge resistor, a lithium manganese oxide cell voltage detection module, an ARM controller and a protection device, wherein each of the number of the first contactors and the number of the second contactors is equal to the number of the lithium manganese oxide cells. The ARM controller obtains voltage of each lithium manganese oxide cell through the lithium manganese oxide cell voltage detection module, and when the balance degree of the lithium manganese oxide cells is higher than a set threshold value, the lithium manganese oxide cell with the highest voltage is discharged through the high current discharge resistor according to set time. The ARM is taken as the main equalization controller to increase the control speed. High current discharge of the lithium manganese oxide battery is realized in a contactor matrix manner, so that the equalization reliability is improved, and high current discharge is realized. The method is simple to operate, safe and reliable, and the equalization effect is good.

Description

technical field [0001] The invention belongs to the technical field of balancing of lithium battery packs, and particularly relates to a large current balancing method for lithium manganate batteries based on ARM control. Background technique [0002] The development of fuel vehicles has caused huge consumption of oil resources, deepened the global energy crisis, and exacerbated the harm of greenhouse effect and air pollution. Most countries, governments and auto companies in the world generally recognize that energy saving and emission reduction is the development direction of the auto industry in the future, and the development of electric vehicles will be the best way to solve this difficulty. Electric vehicles have the advantages of low noise, no tail gas emissions, environmental friendliness, high thermal efficiency, low emissions, recyclability, and improved energy structure. Various automobile manufacturers are actively developing electric vehicles, and the Chinese g...

AI Technical Summary

Problems solved by technology

When the capacity of the lithium manganese oxide 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 lithium manganese oxide battery is increased, its volume and heat dissipation will face new challenges. There are few existing methods for balancing resistance with large currents.

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