Ternary lithium battery large current balance FPGA control system

Abstract

The invention discloses a ternary lithium battery large current balance field programmable gate array (FPGA) control system which comprises at least two serially connected ternary lithium batteries, a first contact, a second contact, a large-current discharge resistor, a ternary lithium battery voltage detection module, an FPGA controller and a protection device, wherein the FPGA controller is used for acquiring voltages of different ternary lithium batteries through the ternary lithium battery voltage detection module; when the balance degree of the ternary lithium batteries is greater than a set threshold, the power of the ternary lithium battery with the maximum voltage is discharged through the large-current discharge resistor according to a set time. As an FPGA is adopted as a main balance controller of the system, the control speed can be increased. Due to the adoption of a contact matrix mode, large-current discharge of the ternary lithium batteries can be achieved, the balance reliability can be improved, and large-current discharge can be achieved. The system is simple in structure, convenient to operate, safe and reliable and good in balance effect.

Description

technical field [0001] The invention belongs to the technical field of equalization of lithium battery packs, in particular to an FPGA control system for large current equalization of ternary 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 elec...

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. Existing systems that use resistance balancing rarely have large current balancing systems

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