Marine lithium battery health management system based on multi-level temperature monitoring and internal resistance measurement and calculation

Abstract

The invention discloses a marine lithium battery health management system based on multi-level temperature monitoring and internal resistance measurement and calculation, and the system is characterized in that the system comprises slave system modules disposed in each battery pack, and each slave module communicates with a main system module; the slave system template is composed of an analog front end, an equalization circuit, a communication circuit, a protection drive circuit, a processing unit and a power supply unit. Wherein the analog front end is used for acquiring voltage, current andtemperature of a single body; the processing unit is used for estimating the state of charge of the battery, controlling monomer balance and measuring and calculating the internal resistance of the battery; the equalization circuit is used for controlling discharge equalization of the single batteries; the protection driving circuit is connected with the processing unit and is used for charging and discharging protection of the battery; and the power supply unit is used for supplying power to the system. Through a two-stage distributed architecture between the master control system and the slave control system, the dynamic balance control of the lithium battery of the whole BMS system is realized.

Description

technical field [0001] The invention relates to a marine lithium battery health management system for multi-level temperature monitoring and internal resistance measurement, belonging to the technical field of batteries. Background technique [0002] As the main carrier of economic globalization, the shipping industry has made great contributions to worldwide economic and trade. However, the current navigation of ships mainly relying on marine diesel engines has exacerbated resource depletion and ecological deterioration. Green ships have become the direction of future ship development. As a pure electric ship with lithium iron phosphate battery as the sole power source, the technical status of the lithium battery pack has an extremely important impact on the normal operation of the ship. If the crew can grasp the actual working conditions of the lithium battery pack in real time, and use this as a basis to realize the scientific use and reasonable maintenance of the lithi...

AI Technical Summary

Problems solved by technology

However, the reliability of the current marine lithium battery module detection device is low. When it comes to large-scale analog transmission, the rate is low and the real-time performance is poor.

In addition, the collection of temperature cannot meet the relevant regulations of the classification society, and the purpose of measuring the temperature of the whole cell cannot be achieved; the existing charge and discharge protection measures do not consider the rate of change of temperature rise; Lithium-ion battery state-of-health (SOH) estimation is also insufficient

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