Battery SOP online estimation method based on pool algorithm

Abstract

The invention discloses a battery SOP online estimation method based on a pool algorithm and solves problems that in the prior art, battery power state estimation is not reliable, and peak power and continuous power switching is not smooth. The method comprises steps of S1, reading a current SOC value, the highest cell temperature and the lowest cell temperature of a battery; S2, inquiring an SOC-Temp-SOP map, and determining peak power and continuous power; S3, calculating according to the peak power, the continuous power and the required duration to obtain the rated pool size and differencebetween the real-time power and the continuous power; S4, calculating according to a difference value to obtain the size of an available pool; and S5, calculating to obtain output power according to the continuous power and the size of the available pool, and returning to the step S1. The method is advantaged in that dynamic characteristics of the battery are considered, a current state and a battery power state in a future period of time can be accurately estimated according to the real-time power quick response, and the power changes stably according to the rated speed so that jerking feeling of a driver is avoided.

Description

technical field [0001] The invention relates to the field of battery management, in particular to a battery SOP online estimation method based on a pool algorithm. Background technique [0002] New energy vehicles have the advantages of low noise, low urban exhaust emissions, simple operation, and strong sense of acceleration, and are gradually accepted by people. SOP estimation is one of the key technologies of battery management. It is used to determine the upper limit output power and upper limit input power of the battery. Unreasonable value estimation will directly affect the acceleration and comfort of the vehicle, which will easily cause battery overcharge, overdischarge, and reduce battery life. . [0003] The main methods for estimating SOP in enterprises today include: querying the SOC-Temp-SOP map by reading SOC and temperature values ​​to obtain peak power and continuous power, and then switching between peak power and continuous power according to the power usa...

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the problems of unreliable battery power state estimation and unsmooth switching between peak power and continuous power in the prior art; it provides an online battery SOP estimation method based on a pool algorithm, and the power estimation is fast and accurate, and the switching between peak power and continuous power changes smooth

Images