DSP control based large current balancing method of lead-acid battery

Abstract

The invention discloses a DSP control based large current balancing method of a lead-acid battery. A lead-acid battery control system is arranged and comprises at least two lead-acid batteries, first contactors, second contactors, a large current discharge resistor, a lead-acid battery voltage detection module, a DSP controller and a protection device, wherein the lead-acid batteries are connected in series, the number of the lead-acid batteries is equal to the numbers of the first contactors and the second contactors, the DSP controller acquires the voltage of each lead-acid battery through the lead-acid battery voltage detection module, and when the balance degree among the lead-acid batteries is larger than a set threshold value, the lead-acid battery with maximum voltage is discharged by the large current discharge resistor according to set time. A DSP is taken as a main balance controller, and the system cost is reduced; with the adoption of a contactor matrix mode, large current discharge of the lead-acid battery is achieved so as to improve the balance reliability and achieve large current discharge; and the method disclosed by the invention is simple to operate, is safe and reliable and is high in balancing effect.

Description

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

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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