Large current balancing control system of nickel metal hybrid battery

Abstract

The invention discloses a large current balancing control system of a nickel metal hybrid battery. The large current balancing control system of the nickel metal hybrid battery comprises at least two nickel metal hybrid batteries, first contactors, second contactors, a large current discharging resistor, a nickel metal hybrid battery voltage detection module, a singlechip microcomputer controller and a protection device, wherein the at least two nickel metal hybrid batteries are connected in series, the quantity of the first contactors and the second contactors are the same as the quantity of the nickel metal hybrid batteries, the singlechip microcomputer controller acquires the voltage of each nickel metal hybrid battery through the nickel metal hybrid battery voltage detection module, and when the balance degree among the nickel metal hybrid batteries is greater than a set threshold, the nickel metal hybrid 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 nickel metal hybrid 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 battery packs, in particular to a high-current equalization control system for nickel-metal hydride 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 vehicles...

AI Technical Summary

Problems solved by technology

When the capacity of the Ni-MH 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 Ni-MH battery is increased, its volume and heat dissipation will face new challenges. Existing methods for balancing resistance have few methods for balancing large currents

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