Plug-in vehicle power supply system attenuation evaluation method and system

By redefining the median voltage Vmid and calculating the stretching voltage Vforce, a lifetime prediction model was established, which solved the accuracy problem of power system degradation assessment for plug-in vehicles and realized quantitative prediction of the power system lifetime for plug-in vehicles.

CN116720252BActive Publication Date: 2026-07-14ZHENGZHOU YUTONG BUS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU YUTONG BUS CO LTD
Filing Date
2022-10-08
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technologies cannot accurately assess the degradation of plug-in vehicle power systems, especially the issues of reduced output power capacity and frequent voltage limit breaches caused by increased internal resistance, which affect the vehicle power system. There is a lack of effective online assessment methods.

Method used

By redefining the median voltage Vmid, the stretch voltage Vforce is calculated as the sum of the product of the voltage distance abs(Vmid-Vi) and the voltage ratio ratioi. A lifetime prediction model is then established, and this model is used to predict the remaining service life of the power system of plug-in vehicles.

Benefits of technology

It enables quantitative prediction of the lifespan of plug-in vehicle power systems, providing a new and highly reliable evaluation metric that solves the problem of inaccurate assessment of the degradation of plug-in vehicle power systems.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application belongs to the technical field of new energy electric vehicle battery life, and particularly relates to a plug-in vehicle power supply system attenuation evaluation method and system. i The corresponding proportion ratio i , find the voltage point with the largest proportion from the voltage points, and record the voltage point as the median voltage V mid , and then calculate the stretching voltage V force of the vehicle power supply system; 2) input the stretching voltage V force into the established life prediction model of the power supply system to output the predicted remaining use time of the power supply system. The application defines the stretching voltage V force , which is a brand-new and high-reliability evaluation index of the use life of the plug-in vehicle power supply system. The stretching voltage V force is input into the established life prediction model, the remaining use time is output through the calculation of the model, and therefore the quantitative prediction of the life of the plug-in vehicle power supply system is realized, and the problem that the attenuation of the plug-in vehicle power supply system cannot be accurately evaluated is solved.
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