Battery pack power control method suitable for railway passenger car

Abstract

The invention provides a battery pack power control method suitable for a railway passenger car. The method includes the following steps that a two-dimensional power table of the maximum permitted power, the temperature and the SOC is established; battery state information is acquired; the maximum permitted power value of batteries is acquired through a table lookup method; the needed power value of the railway passenger car in a next working condition is calculated according to a current working condition; the maximum permitted power value acquired through the table lookup method is compared with the needed power value, and the small value is acquired and serves as a target power value; the current power value is smoothened so as to be close to the target power value; the power value is calculated and sent to a motor controller. According to the battery pack power control method in the scheme, through the real-time, regular and online current state of a lithium battery pack and in combination with the current real-time power and the needed power of the railway passenger car, the power value capable of being input and output in real time of the power lithium batteries is calculated and transmitted to a TCU of the railway passenger car so as to be controlled, the requirement for the operating power of the railway passenger car is met, the safety of the power lithium batteries can be effectively guaranteed, the service life of the batteries can be prolonged, and the performance of the railway passenger car can be improved.

Description

technical field [0001] The invention relates to a battery pack power control method suitable for rail passenger vehicles. Background technique [0002] The existing battery input and output power control strategy method is based on the pure electric vehicle working conditions, according to the battery characteristics, combined with the battery temperature and SOC and other states to calculate the maximum input and output power value of the battery pack, and control the motor to perform power input and output according to the maximum power value. However, the operating conditions of rail passenger cars such as subways are completely different from those of pure electric vehicles. The distance between stations of rail passenger cars is short, and they are charged at each station, and the charging time is very short. Therefore, the existing power input and output control The strategic plan is only applicable to the general pure electric vehicle plan, and is not suitable for us...

AI Technical Summary

Problems solved by technology

However, the operating conditions of rail passenger cars such as subways are completely different from those of pure electric vehicles. The distance between stations of rail passenger cars is short, and they are charged at each station, and the charging time is very short. Therefore, the existing power input and output control The strategic plan is only applicable to the general pure electric vehicle plan, and is not suitable for use on rail cars with special working conditions

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