Nickel-metal hydride battery large-current equalization method based on ARM control

Abstract

The invention discloses a nickel-metal hydride battery large-current equalization method based on ARM control. The method is characterized in that a nickel-metal hydride battery control system is set, the nickel-metal hydride battery control system comprises at least two serially-connected nickel-metal hydride batteries, first contactors, second contactors, a large-current discharge resistor, a nickel-metal hydride battery voltage detecting module, an ARM controller and a protecting device, and each nickel-metal hydride battery corresponds to one first contactor and one second contactor; the ARM controller acquires the voltage of each nickel-metal hydride battery through the nickel-metal hydride battery detecting module, and the nickel-metal hydride battery with the largest voltage is discharged through the large-current discharge resistor according to set time when the equalization degree among the nickel-metal hydride batteries is larger than a set threshold. The nickel-metal hydride battery large-current equalization method has the advantages that the ARM controller is used as the main equalization controller, and control stability and quickness are increased; large-current discharge of the nickel-metal hydride batteries is achieved by a contactor matrix manner so as to increase equalization reliability; the method is simple to operate, safe and reliable, and good in equalization effect.

Description

technical field [0001] The invention belongs to the technical field of equalization of nickel-hydrogen battery packs, and in particular relates to a large-current equalization method for nickel-hydrogen batteries based on ARM 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 manufacturers are ...

AI Technical Summary

Problems solved by technology

When the capacity of the Ni-MH 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 Ni-MH battery is increased, its volume and heat dissipation will face new challenges. Existing methods for balancing resistance have few methods for balancing large currents

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