Method and device for determining echelon utilization battery energy storage system consistency maintenance index

Abstract

The invention provides a method and a device for determining an echelon utilization battery energy storage system consistency maintenance index. The method and the device relate to the technical field of echelon utilization batteries. The method comprises the steps of: sampling to obtain a battery module to be tested, conducting multiple charge and discharge tests on the battery module to be tested according to preset operating conditions for tests, and recording operating parameters; determining surplus capability of the battery module to be tested after conducting every preset number of charge and discharge tests, determining indexes of each single battery in the battery module to be tested according to the operating parameters, and determining ranges, mean square deviations and dispersion parameters the indexes of the battery module to be tested; determining correlation coefficients of the surplus capability of the battery module and the index ranges to be tested, correlation coefficients of the surplus capability of the battery module to be tested and the index mean square deviations, or correlation coefficients of the surplus capability of the battery module to be tested and the index dispersion; and determining a consistency maintenance index of the battery module to be tested according to the correlation coefficients.

Description

technical field [0001] The present invention relates to the technical field of cascaded utilization batteries, in particular to a method and device for determining the consistency maintenance index of a cascaded utilization battery energy storage system. Background technique [0002] At present, with the over-exploitation of oil resources and people's constant attention to the environment and new energy, electric vehicles have already occupied a certain position in the current market. The electric vehicle converts the electric energy in the battery into the kinetic energy of the vehicle for various movements of the electric vehicle. When the battery capacity drops below 80%, it is generally considered unsuitable for continued use in electric vehicles. At this time, if the battery is eliminated directly, it will cause a waste of resources. At present, in order to avoid this waste of resources, cascade utilization of power batteries in battery energy storage power stations i...

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for determining the consistency maintenance index of the cascade utilization battery energy storage system, so as to solve the problem that it is difficult to accurately determine the maintenance index related to the consistency of the battery energy storage system in the prior art

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