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Electric vehicle battery management system

The electric vehicle battery management system is mainly used for monitoring battery system of electric automobile, including lead-acid batteries, lithium batteries and some other batteries. Based on different working condition of vehicles, it can control the charging and discharging process of battery, to achieve the best performance and the longest service life of battery. Main characteristics (functional benefits) • Data collection module: Collecting total voltage and current of battery group, voltage and current of single battery, temperature of single battery, ambient temperature and some other parameters, for control parameters of the battery group and the whole vehicle. • SOC&SOH estimation module: Estimating the residual capacity and health status of the battery group based on current, voltage, temperature and some other parameters for important parameters to control the whole vehicle. • CAN bus communication module: Realizing communication between the battery group and the whole vehicle through CAN bus and receiving control orders from the whole vehicle controller. • Control module: Control the charging and discharging processes of the battery group and prevent single battery from overcharging/over-discharging. Technological advantages (functional benefits) • All the batteries are managed by one control module. • Ampere hour method is mainly used, so the precision in short period is high but the accumulative error in a long period is obvious. • The same BMS has good performance only for one type of batteries. • Due to large data collection volume and high precision requirement, the traditional method has complex interior circuit poor safety and anti-interference performance. • CAN bus protocol. Application fields Electric vehicle, electric forklift, electric golf carts and so on.

Summary

The electric vehicle battery management system is mainly used for monitoring battery system of electric automobile, including lead-acid batteries, lithium batteries and some other batteries. Based on different working condition of vehicles, it can control the charging and discharging process of battery, to achieve the best performance and the longest service life of battery.

Main characteristics (functional benefits)

• Data collection module: Collecting total voltage and current of battery group, voltage and current of single battery, temperature of single battery, ambient temperature and some other parameters, for control parameters of the battery group and the whole vehicle.

• SOC&SOH estimation module: Estimating the residual capacity and health status of the battery group based on current, voltage, temperature and some other parameters for important parameters to control the whole vehicle.

• CAN bus communication module: Realizing communication between the battery group and the whole vehicle through CAN bus and receiving control orders from the whole vehicle controller.

• Control module: Control the charging and discharging processes of the battery group and prevent single battery from overcharging/over-discharging.

Technological advantages (functional benefits)

 All the batteries are managed by one control module.

 Ampere hour method is mainly used, so the precision in short period is high but the accumulative error in a long period is obvious.

 The same BMS has good performance only for one type of batteries.

 Due to large data collection volume and high precision requirement, the traditional method has complex interior circuit poor safety and anti-interference performance.

 CAN bus protocol.

Application fields

Electric vehicle, electric forklift, electric golf carts and so on.