A lithium battery management system

Abstract

The invention discloses a lithium battery management system integrating information collection, data communication, and power balance functions, the system includes a battery pack controller and a plurality of cell controllers, the input port of each cell controller is connected with a cell, the plurality of cell controllers are connected in series to form a battery pack at the output terminal thereof, the output terminal of the battery pack is connected with the output terminal of the battery pack controller, and the input terminal of the battery pack controller is connected with an electricity utilization load or a charging device. The power topology of the cell controllers adopts a bidirectional DC-DC converter for realizing charging or discharging of cells; the cell controllers and thebattery pack controller communicate through power signal composite modulation communication. The invention can realize multiple functions such as information collection, data communication, battery electric energy active balance, battery pack protection, and historical information storage, and has the advantages of low communication cost, simple maintenance, wiring harness saving, compact structure and convenient secondary use of the battery.

Description

Technical field [0001] The invention belongs to the technical field of battery management, and specifically relates to a lithium battery management system that integrates the functions of information collection, data communication, and power balance. Background technique [0002] Lithium-ion power batteries have been widely used in all aspects of life and production, whether it is common electric vehicles, electric tools, and electric bicycles in daily life, or emerging technologies such as new energy power generation, smart grids, lithium-ion power The battery is an important part of it, providing energy for the system or storing excess energy. [0003] In the field of high-power applications, compared with other types of energy storage batteries, lithium-ion batteries have the advantages of high energy and power density, long cycle life, and environmental protection; compared with nickel-hydrogen batteries, their cell voltage is about three times higher. The power density is abo...

AI Technical Summary

Problems solved by technology

[0007] In view of the above, the present invention provides a lithium battery management system that integrates the functions of information collection, data communication, and electric energy balance, which can solve the problems of complex design and wiring of traditional battery management systems

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