Mixed rapid estimation method for residual energy of battery

Abstract

The invention relates to a mixed rapid estimation method for the residual energy of a battery. The prior method can not satisfy online detection requirements and has poor precision. The method comprises the following steps: firstly, estimating the initial residual energy of the battery by an open-circuit pressure method; then, alternately using an extended Kalman filtering method and an ampere hour method to estimate the residual energy of the battery; and directly using the extended Kalman filtering method to estimate the residual energy when the residual energy is very low. The method can conveniently and rapidly estimate the residual energy of the battery and has high velocity of convergence and higher estimation precision.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a hybrid fast estimation method for battery remaining power. Background technique [0002] As a backup power source, batteries have been widely used in communications, power systems, military equipment and other fields. Compared with traditional fuel vehicles, electric vehicles can achieve zero emissions, so they are the main development direction of future vehicles. In an electric vehicle, the battery is directly used as an active energy supply component, so its working condition is directly related to the driving safety and operational reliability of the entire vehicle. In order to ensure the good performance of the battery pack in electric vehicles and prolong the service life of the battery pack, it is necessary to know the operating status of the battery in a timely and accurate manner, and manage and control the battery reasonably and effectively. [0003] Accurate estima...

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