Ternary lithium battery heavy current balance control system

Abstract

A ternary lithium battery heavy current balance control system disclosed by the present invention comprises at least two series-wound ternary lithium batteries, first and second contactors of which the numbers are equal to the number of the ternary lithium batteries, a heavy current discharge resistor, a ternary lithium battery voltage detection module, a single-chip microcomputer controller and a protection device. The single-chip microcomputer controller obtains the voltage of the ternary lithium batteries via the ternary lithium battery voltage detection module, and when the balance degree among the ternary lithium batteries is greater than a set threshold value, the ternary lithium battery having the maximum voltage discharges via the heavy current discharge resistor according to the set time. According to the present invention, a single-chip microcomputer is used as a main balance controller to reduce the cost of the system, and the heavy current discharge of the ternary lithium batteries is realized in a contactor matrix manner, thereby improving the balance reliability, and realizing the heavy current discharge. The system is simple to operate, is safe and reliable and is good in balance 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 control system of a ternary lithium battery. 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 el...

AI Technical Summary

Problems solved by technology

When the capacity of the ternary 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 ternary lithium battery is increased, its volume and heat dissipation will face new challenges. There are few existing methods for balancing resistance with large current balancing.

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