Power battery life detection method and device

Abstract

The embodiment of the invention discloses a power battery life detection method and device, and relates to the technical field of a power battery. The method comprises the steps that a dynamic average is obtained according to driving condition data so that the simplified condition data of the driving condition data are obtained; a power battery discharge strategy is confirmed according to the current change data in the simplified conditions; constant current charging is repeatedly performed on the power battery on an electric automobile for multiple times, and discharging is performed according to the power battery discharge strategy; and if the current capacity of the power battery is attenuated to a percentage, which is less than a preset percentage, of the initial rated capacity of the power battery the cycling charge and discharge process, the number of cycles of charge and discharge of the power battery is confirmed and the number of cycles acts as the cycle life of the power battery. Problems of inaccurate detection results and poor experiment effectiveness when the power battery life is detected by a present constant current charge and discharge experiment mode without considering the actual driving conditions can be solved.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method and device for detecting the service life of a power battery. Background technique [0002] Under the urgent needs of economic globalization and social energy conservation and emission reduction, the focus of the development of the world's automobile industry is shifting. At present, the development of new energy vehicles with the characteristics of environmental protection and energy saving has become a consensus in the automotive field, and electric vehicles are a common technology in this direction of development. An electric vehicle is a vehicle powered by a power battery. As an important part of an electric vehicle, the performance of the power battery will directly affect the development and application prospects of the electric vehicle. At present, the life of a power battery is an important performance indicator of a power battery, and it is generally be...

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for detecting the service life of a power battery to solve the inaccurate test results of detecting the life of a power battery through a constant current charging and discharging experiment method that does not consider the actual driving conditions, and the effectiveness of the experiment is relatively low. bad question

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