FPGA control-based high-current balancing method for lead-acid batteries

Abstract

The invention discloses an FPGA control-based high-current balancing method for lead-acid batteries. One set of lead-acid battery control system is arranged. The lead-acid battery control system comprises at least two lead-acid batteries connected in series, first contactors, second contactors, a high-current discharge resistor, a lead-acid battery voltage detection module, an FPGA controller and a protection device, wherein the first contactors and the second contactors are equal to the lead-acid batteries in quantity; the FPGA controller obtains voltage of the lead-acid batteries through the lead-acid battery voltage detection module; and the lead-acid battery with the highest voltage is discharged through the high-current discharge resistor according to set time when the balance degree between the lead-acid batteries is greater than a set threshold. An FPGA is adopted as a main balance controller, so that the cost of the system is reduced. By adopting a contactor matrix mode, high-current discharging of the lead-acid batteries is achieved to improve the balancing reliability and to achieve high-current discharging. The method disclosed by the invention is simple in operation, safe, reliable and good in balancing effect.

Description

technical field [0001] The invention belongs to the technical field of equalization of lead-acid battery packs, in particular to a large-current equalization method for lead-acid batteries based on FPGA 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 actively developing ele...

AI Technical Summary

Problems solved by technology

When the capacity of the lead-acid 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 lead-acid battery is increased, its volume and heat dissipation will face new challenges. Existing methods for balancing resistors rarely have methods for balancing large currents

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