Storage battery surplus energy monitoring method and monitoring device

Abstract

The invention discloses a storage battery surplus energy monitoring method and a monitoring device. The monitoring device comprises the following steps of: constructing a storage battery state space model; utilizing off-line sample data to carry out off-line identification on the state space model of a storage battery, and utilizing a model parameter off-line identification result and on-line sample data to carry out on-line identification on the state space model of the storage battery; constructing a state observer according to a model parameter on-line identification result and a storage battery state space model, and carrying out observation on a storage battery open-circuit voltage; and obtaining the surplus energy of the storage battery according to the corresponding relation of the storage battery open-circuit voltage and the surplus energy of the storage battery. The monitoring method and the monitoring device provided by the invention can carry out monitoring on the surplus energy of the storage battery through a method of the on-line identification model parameter, effectively reduce storage battery time-varying nonlinear characteristic, the influence of measuring errors and noises and the like on a surplus energy monitoring result, improve monitoring accuracy, reduce measuring errors, and strengthen the instantaneity of the monitoring.

Description

technical field [0001] The invention relates to the technical field of storage battery application, in particular to a method and a monitoring device for monitoring the remaining power of a storage battery. Background technique [0002] New energy vehicles represented by electric vehicles are generally considered to be one of the most effective ways to solve current energy and pollution problems, and have attracted widespread attention at home and abroad. It is generally believed that an electric vehicle refers to a vehicle that is powered by a vehicle-mounted power supply, uses a motor to drive the wheels, and meets the requirements of road traffic and safety regulations. Compared with traditional fuel vehicles, electric vehicles have the characteristics of high performance, low energy consumption and low pollution, as well as comprehensive advantages in technology, economy and environment, and their prospects are widely optimistic. In this context, electric vehicle techno...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method and a monitoring device for monitoring the remaining battery power, so as to solve the shortcomings of the monitoring method in the prior art, such as inaccurate monitoring results and poor real-time performance, which are affected by the time-varying nonlinear characteristics of the battery, errors and noise, etc.

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