A lithium battery management system

Abstract

The invention discloses a lithium battery management system. The lithium battery management system comprises a lithium battery pack module, a main control module, a voltage sampling module, a currentsampling module, a temperature sampling module, a protective circuit, a supply circuit, a battery SOC (state of charge) estimating module, a battery equalization module, a data displaying module, a communication separation module and the like. Through the current sampling module, primary road current is converted to be a voltage signal and sent to the battery SOC estimating module. According to the preset compensation factor and rated capacity, the value of SOC is obtained, the more accurate SOC value can be obtained by conducting Kalman filtering, and the SOC value is displayed through the data displaying module. By adopting the certain SOC calculation circuit structure, the accuracy of data sampling is improve, and meanwhile, the lithium battery management system is simple in structure,low in cost, and easy to achieve large-scale production.

Description

technical field [0001] The invention relates to the field of lithium battery management systems, in particular to a lithium battery management system. Background technique [0002] The lithium battery management system BMS is mainly used to ensure the safety of the battery during charging, discharging and storage, increase the effective capacity of the battery, improve the utilization rate of the battery, and provide users with various parameters of the battery intuitively. The main management objects of BMS are secondary batteries. Different secondary batteries have some defects due to different battery structural characteristics, such as harsh operating temperature requirements, short service life, and low capacity. As a new type of secondary battery today, lithium batteries have obvious advantages in capacity, terminal voltage, and energy density compared with traditional lead-acid batteries and nickel-metal hydride batteries. However, due to its small size, more batteri...

AI Technical Summary

Problems solved by technology

However, due to its small size, more batteries are required for series-parallel connection to form a large-capacity battery pack, resulting in a complex battery management structure, insufficient sampling accuracy, and high cost, making it difficult to promote on a large scale.

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