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Battery Management System BMS
- Sep 05, 2017 -

Battery Management (BATTERY MANAGEMENT system) is the link between the battery and the user, the main object is two times the battery.

Two times the battery has some disadvantages, such as less storage energy, short life, serial parallel use problems, the use of security, battery power estimation difficulties. Battery performance is very complex, different types of battery characteristics also vary greatly.

Battery Management System (BMS) is mainly to improve the utilization of batteries, to prevent the battery has been charged and discharged, to extend the battery life, monitor the status of the battery. With the development of battery management system, other functions will be added.

In general, electric vehicle battery management system to achieve the following functions: First, the accurate estimation of the power battery load state, that is, the battery residual power, to ensure that the SOC maintained within a reasonable range, to prevent the battery due to overcharge or over the damage, So as to predict at any time how much energy the hybrid electric vehicle storage battery remains or the charge state of the battery.

Secondly, dynamically monitor the working state of the power battery. In the process of battery charging and discharging, the terminal voltage and temperature, charging and discharging current and the total voltage of the battery are collected in real time to prevent the battery from charging or discharging.

At the same time, it can give the battery condition, select the problem battery, keep the reliability and efficiency of the whole battery running, make the realization of the remaining electricity estimation model possible. In addition, to establish the use of each battery history files, in order to further optimize and develop a new type of electricity, chargers, motors, etc. to provide information for off-line analysis system failure to provide a basis.

Finally, to achieve the balance between the single cell, that is, the monomer battery balanced charging, so that each battery in the battery pack to achieve a uniform state. Equalization technology is the key technology of a battery energy management system which is being researched and developed by the world at present.