Battery Management System (Battery Management System; BMS) is a system used to manage batteries, and is mainly used in electric vehicles. Its important function is to monitor the battery status, calculate auxiliary data, output data, protect the battery, balance the battery status, etc. The purpose is to improve the utilization of the battery, prevent the battery from being overcharged or overdischarged, and prolong the service life of the battery.

Battery management system for lithium ion batteries/Battery management system and energy management system (Energy Management System; EMS) are both indispensable core systems for electric vehicles. Through BMS, battery information can be transmitted to EMS for vehicle energy management, combined with appropriate control strategies, to achieve the purpose of effective and efficient use of batteries.

Battery management system for electric vehicle

Generally speaking, the battery management system must implement the following functions: First, accurately estimate the battery’s state of charge (StateofCharge; SOC), that is, the remaining battery power, to ensure that the SOC is maintained within a reasonable range, and to predict the driving at any time The status of the remaining power of the electric vehicle battery.

Secondly, it must be able to conduct dynamic monitoring. In the process of battery charging and discharging, the voltage and temperature of each battery in the electric vehicle battery pack are collected in real time to prevent the battery from overcharging or discharging.

In addition, it is necessary to be able to charge each battery in the battery pack on average to achieve a balanced and consistent state. It is also a technology that the current battery management system is working hard to develop to extend the life of the battery block.

Linkage battery management system design

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