Manganic acid lithium battery heavy current equalization method based on FPGA control

Abstract

The invention discloses a manganic acid lithium battery heavy current equalization method based on FPGA control. A manganic acid lithium battery control system is set, the system comprises at least two series manganic acid lithium batteries, first contactors and second contactors which are identical to the manganic acid lithium batteries in quantity, a heavy current discharging resistor, a manganic acid lithium battery voltage detection module, a FPGA controller and a protection device. Each manganic acid lithium battery voltage is acquired by the FPGA controller through the manganic acid lithium battery voltage detection module, when an equalization degree between the manganic acid lithium batteries is greater than a threshold, the largest-voltage manganic acid lithium battery discharges through the heavy current discharging resistor according to the set time. The method is advantaged in that the FPGA is mainly taken as an equalization controller, a control speed is improved; a contactor matrix mode is employed, heavy current discharging of the manganic acid lithium batteries is realized, equalization reliability is improved, and heavy current discharging is realized. The method is advantaged in that operation is simple, the method is safe and reliable, and the equalization effect is good.

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 lithium manganate 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 activ...

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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