Lead-acid battery high-current balance FPGA control system

Abstract

The invention discloses a lead-acid battery high-current balance FPGA control system. The system comprises at least two lead-acid batteries in series connection, first contactors and second contactors with same number as the lead-acid batteries, a high-current discharge resistor, a lead-acid battery voltage detection module, an FPGA controller and a protection device. The FPGA controller obtains the voltage of each lead-acid battery through the lead-acid battery voltage detection module; and if the balance degree between the lead-acid batteries is greater than a set threshold, the lead-acid battery with the highest voltage is discharged by the high-current discharge resistor according to the set time. According to the system, by adopting the FPGA as the main balance controller, the system cost is lowered. Through a contactor matrix way, high-current discharge of the lead-acid battery is realized so as to improve the balance reliability and realize high-current discharge. The system has the advantages of simple structure, convenience in operation, safety and reliability and good balance effect.

Description

technical field [0001] The invention belongs to the technical field of equalization of lead-acid battery packs, in particular to an FPGA control system for high-current equalization of lead-acid batteries. 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 ...

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 systems that use resistance balancing rarely have large current balancing systems

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