Method and device for correcting state of charge (SOC) of battery of electric vehicle

A battery state of charge, electric vehicle technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problem of inaccurate battery state of charge estimation, and achieve the goal of improving SOC estimation accuracy, ensuring accuracy, and reducing interference Effect

Inactive Publication Date: 2017-08-18
中凯智控科技(洛阳)有限公司
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method and device for correcting the battery state of charge of an electric vehicle to solve the problem of inaccurate estimation of the state of charge of the battery when the state of charge of the battery is at a plateau

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for correcting state of charge (SOC) of battery of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the embodiments of the present invention are not limited thereto.

[0029] Embodiment of the method for correcting the state of charge of the electric vehicle battery of the present invention:

[0030] Such as figure 1 Shown is the flow chart of the method of the present invention.

[0031] First, build the correction library. Under different temperature conditions, the lithium-ion battery is charged and discharged with different charge-discharge ratios, and the correction function relationship between the battery state of charge value and the charge-discharge voltage value at different temperatures and different charge ratios is obtained. For each A calibration function relationship is used for curve fitting to obtain multiple charge-discharge vo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method and a device for correcting the state of charge (SOC) of a battery of an electric vehicle. Through a large number of experiments, correction relation curves for states of charge of the battery under different temperature and different charging and discharging rates and voltage values can be obtained, and the correction function relations form a correction library; as for a battery in a state of charge platform stage, with the correction library as a reference, a period of time with steady charging and discharging rates is selected, the current relation curve in the period of time and a correction relation curve in the correction library under the current temperature are evaluated, and the state of charge of a lithium ion battery is corrected according to the correction evaluation result. The SOC estimation accuracy of the SOC of the battery in the platform stage can be effectively improved, the safety of the battery use is improved, the service life of the battery is prolonged, and the problem that when the SOC of the battery is in the platform stage in the prior art, the correction precision for the SOC of the battery is not high can be solved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a method and a device for correcting the state of charge of an electric vehicle battery. Background technique [0002] The battery state of charge (State Of Charge, SOC) reflects the remaining capacity of the battery. It is an important parameter used to describe the capacity that can be charged and discharged during the use of the battery. It is also the most intuitive parameter for customers to understand the working status of the battery. Due to the complex chemical reaction of the battery charging and discharging process, the harsh operating conditions and serious interference, it is necessary to perform real-time parameter estimation, management and control of the battery SOC in actual use to ensure the safety of the application and prolong its service life. Therefore, the estimation and correction of the battery SOC It is the core technology of the bat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 周祥王文武吕少锋田云芳
Owner 中凯智控科技(洛阳)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap