Battery Management System

Battery management system can be used in electric vehicles, electric motorbikes, underwater vehicles and so on. In general, the battery management system should achieve the following functions:

(1) Accurate Estimation of SOC:

Estimate accurately the State of Charge (SOC) of the power battery pack, that is, the remaining battery power, ensure that SOC is maintained within a reasonable range, prevent from damaging to the battery itself due to overcharge or over-discharge, and display the power energy remaining in the hybrid electric vehicle battery at any time, that refers to the charging state of the energy storage battery.

(2) Dynamic Monitoring:

In the process of battery charging and discharging, the terminal voltage and temperature of each battery, charging and discharging current and total voltage of battery pack are collected in real time to prevent from over charging or over discharging. At the same time, it also can show the status of batteries, select the batteries with problems, maintain the reliability and efficiency of the whole battery operation, and make the realization of residual power estimation model possible. In addition, the historical files of each battery should be established to provide information for further optimization and development of new types of electricity, chargers and motors, and to provide basis for off-line analysis of system faults.

The charging and discharging process of batteries usually utilize current sensors with higher accuracy and better stability for real-time detection. Generally, according to the different front-end currents of BMS, the corresponding sensor ranges are chosen to approach. Taking 400A as an example, the open-loop principle is usually adopted. JCE400-ASS current sensors which can withstand low temperature, high temperature and strong earthquake are adopted by domestic and foreign manufacturers. The characteristics of high precision and fast response time should be satisfied when selecting sensors.

(3) Balance Among Batteries:

The single battery is charged equally, so that all batteries in the battery pack are in a state of equilibrium and consistency. Balance technology is a key technology of battery energy management system of all.

FIC, as being a design manufacturer for over 40 years, has profound capability to design and produce battery management system for your project. If you have such design request for your fly car electronic products, please send us the technical document and contact us today.