Large current balancing control system of lithium ferrous battery

Abstract

The invention discloses a large current balancing control system of a lithium ferrous battery. The large current balancing control system of the lithium ferrous battery comprises at least two lithium ion batteries, first contactors, second contactors, a large current discharging resistor, a lithium ferrous battery voltage detection module, a singlechip microcomputer controller and a protection device, wherein the at least two lithium ferrous batteries are connected in series, the quantity of the first contactors and the second contactors are the same as the quantity of the lithium ferrous batteries, the singlechip microcomputer controller acquires the voltage of each lithium ferrous battery through the lithium ferrous battery voltage detection module, and when the balance degree among the lithium ferrous batteries is greater than a set threshold, the lithium ferrous battery with the maximum voltage is discharged by the large current discharging resistor according to a set time. In the large current balancing control system, a singlechip microcomputer is taken as a main balancing controller, and the system cost is reduced; with the adoption of a contactor matrix, large current discharging of the lithium ferrous battery is achieved, the balancing reliability can be improved, and the large current discharging is achieved; and the system is simple to operate, is safe and reliability and is high in balancing effect.

Description

technical field [0001] The invention belongs to the technical field of equalization of lithium battery packs, in particular to a large-current equalization 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 electric vehicle...

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 methods for balancing resistance have few methods for balancing large currents

Images