Heavy-current equalization DSP control system for lithium ferric batteries

Abstract

The invention discloses a heavy-current equalization DSP control system for lithium ferric batteries. The heavy-current equalization DSP control system comprises at least two lithium ferric batteries connected in series, first contactors, second contactors, a heavy-current discharge resistor, a lithium ferric battery voltage detection module, a DSP controller and a protection device, wherein the number of the lithium ferric batteries is equal to that of the first contactors and that of the second contactors; the DSP controller acquires the voltage of each lithium ferric battery through the lithium ferric battery voltage detection module, and when the balance degree between the lithium ferric batteries is larger than the set threshold value, the lithium ferric battery with the highest voltage is discharged through the heavy-current discharge resistor according to the set time. The DSP, as the main equalization controller, improves the control speed and stability; the contactor matrix mode is adopted to realize heavy-current discharge of the lithium ferric batteries, so that the equalization reliability is improved, and heavy-current discharge is realized; meanwhile, the heavy-current equalization DSP control system is simple to operate, safe and reliable and excellent in equalization effect.

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 DSP control system for iron-lithium 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 ...

AI Technical Summary

Problems solved by technology

When the capacity of the iron-lithium 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 iron-lithium battery is increased, its volume and heat dissipation will face new challenges. Existing control systems that use resistance balancing rarely have high-current balancing control systems

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