Balance control method of lithium-ion battery set

Abstract

The invention discloses a balance control method of a lithium-ion battery set. Internal parameters of each single battery of the battery set and an accurately estimated SOC value serve as the reference quantity of a battery set balance control algorithm; the safety problem possibly caused by overcharging and overdischarging of the battery set is resolved through the balance control scheme, the service life of the battery set is prolonged, and the performance of the battery set is improved. Through the balance control method of the lithium-ion battery set, balance control can be carried out on the work state and performance of the lithium-ion battery set, an active balance control method based on the SOC estimation value is built, and the intelligent balance control method of the lithium-ion battery set is designed through the electronic technique and the computer control technology. The implementation of the balance control method of the lithium-ion battery set has great significance for promoting the popularization of lithium-ion batteries, improving the energy storage capacity and the utilization rate of the lithium-ion battery set, and prolonging the cycle life of the lithium-ion battery set, overcomes the defects of a lithium-ion battery set balance control system, and promotes the application and popularization of the new energy electric car technology based on lithium-ion batteries.

Description

technical field [0001] The present invention relates to a control method, and more particularly, to a balance control method of a lithium ion battery pack. Background technique [0002] The new energy industry is a strategic and leading industry of the national economy, which plays a very important role in stimulating economic growth, adjusting the industrial structure, promoting industrial transformation and upgrading, and breaking through the constraints of energy bottlenecks. Since the 1990s, as one of the development directions of the new energy industry, lithium-ion batteries have attracted more and more attention from domestic and foreign researchers, and have made significant research progress. During the 11th Five-Year Plan period, the research and development of lithium-ion batteries for power storage was included in major scientific and technological projects, with a funding intensity of nearly 1 billion yuan. At present, domestic and foreign efforts are devoted t...

AI Technical Summary

Problems solved by technology

[0003] Lithium-ion batteries have the following excellent performance characteristics: high voltage, large specific energy, long cycle life, good safety performance, and small self-discharge. However, due to the modularization of lithium-ion battery packs, safety performance and New problems such as battery cycle life, if these problems are not solved in time, it will restrict the application of lithium-powered battery packs in new energy vehicles

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