Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An identification method for the second-order rc equivalent model of power lithium battery

An equivalent model and identification method technology, applied in the field of effective model identification, can solve problems such as simple structure

Active Publication Date: 2016-02-03
QINGDAO VECCON ELECTRIC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first-order RC model can better reflect the dynamic and static characteristics of the battery; considering the temperature, current, and internal resistance differences during charging and discharging, it can accurately simulate the charging and discharging behavior of the battery, but its structure is relatively simple

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
  • An identification method for the second-order rc equivalent model of power lithium battery
  • An identification method for the second-order rc equivalent model of power lithium battery
  • An identification method for the second-order rc equivalent model of power lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] The first step is to use ITECH’s discharge equipment to conduct a discharge test on a single cell of the power lithium battery, and record the voltage and current values ​​during the discharge process every 1 second. Through the battery performance test, it can be seen that the normal voltage of the battery is 2.800V to 4.245V, and the capacity is 2.4208Ah (Ampere hours). The discharge process is divided into 10 times, and the current value is used to discharge 10 times. The discharge capacity of each discharge is 0.24208Ah, and the pause time is 20 minutes after each discharge. The specific scheme is shown in Table 1, and Table 1 is the discharge experiment information table. According to the experimental test data, the discharge data with SOC of 0.8 is intercepted to determine the charge and discharge current i L , battery working voltage U ...

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 discloses an identification method of a second order resistance and capacitance (RC) equivalent model of a power lithium battery based on a second order RC model. The identification method of the second rate RC equivalent model of the power lithium battery includes the steps of confirmation of an identification equation of the second order RC equivalent model, acquisition of identification data, calculation of battery ohm internal resistance and identification of the least square method. By means of the identification of the second order RC equivalent model of the power lithium battery, the dynamic and static performances of the battery can be reflected well; on one hand, the RC equivalent model has more precise characterization electrical parameters, the dynamic behavior of charging and discharging of the battery can be simulated scientifically and precisely in consideration of temperature, current and internal resistance difference in the process of charging and discharging; on the other hand, the order of the model is two, no complicated mathematical calculation is needed, and thus a computer can process the model conveniently. Therefore, a mathematical model is established by using the second order RC equivalent model, the state of charge (SOC) of the battery can be evaluated scientifically and precisely, and the identification method of the second rate RC equivalent model of the power lithium battery can be widely used in the research and application of the power lithium battery.

Description

technical field [0001] The invention belongs to the field of electric vehicle battery management, and relates to an identification method for a second-order RC equivalent model of a power lithium battery. Background technique [0002] With the increasingly prominent energy and environmental protection issues, electric vehicles are highly valued by countries all over the world for their advantages of zero emission and low noise. As one of the key technologies for the development of electric vehicles, the battery management system The key to optimization, and accurate estimation of the battery's state of charge SOC (State of Charge) is the premise and key to the good operation of the power lithium battery management system. The nonlinear characteristics of power lithium batteries make it difficult for many filtering methods to obtain scientific and accurate estimation results. Therefore, it is necessary to establish a suitable mathematical model to characterize the external ch...

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 Patents(China)
IPC IPC(8): G01R31/36
Inventor 侯恩广乔昕李小伟刘广敏李杨崔立志贺冬梅
Owner QINGDAO VECCON ELECTRIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com