Supercharge Your Innovation With Domain-Expert AI Agents!

Online real-time identification method for parameters of battery equivalent circuit model

A technology of equivalent circuit model and identification method, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of offline identification limitations, difficult battery model parameters, and no good method for online identification

Active Publication Date: 2020-07-17
枣庄职业学院
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery is a complex electrochemical-physical system with strong nonlinear and time-varying characteristics, which makes it extremely difficult to obtain the model parameters of the battery
Since the characteristics of the battery are affected by many factors such as temperature, battery state of charge (SOC) and battery life state (SOH), the offline identification method is subject to many restrictions and is only suitable for specific applications.
At present, there is no good method on how to construct real-time and online identification of battery model parameters applicable to any condition and any connection mode

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
  • Online real-time identification method for parameters of battery equivalent circuit model
  • Online real-time identification method for parameters of battery equivalent circuit model
  • Online real-time identification method for parameters of battery equivalent circuit model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment discloses a method for online real-time identification of parameters of a battery equivalent circuit model. The method includes the following steps:

[0057] S01), establish the second-order equivalent circuit model of the battery, the second-order equivalent circuit model of the battery includes a series resistance R, the first RC module and the second RC module, and the first RC module includes a parallel resistance R p1 , capacitance C p1 , the second RC block consists of resistors R in parallel p2 , capacitance C p2;

[0058] S02), the second-order equivalent circuit model of the battery can be expressed by formula 1-3:

[0059] U=U o +RI+U p1 + U p2 (1),

[0060]

[0061]

[0062] Where U is the terminal voltage of the battery, I is the current, U o is the open circuit voltage, R is the ohmic internal resistance, C pi , R pi i=1,2 are polarization capacitance and polarization internal resistance respectively;

[0063] S03), formul...

Embodiment 2

[0096] This embodiment discloses another method of identifying κ through parameter identification, and further obtaining the parameters of the second-order equivalent circuit model of the battery. The specific process is:

[0097] b1), the voltage and current are sampled N times, and the matrix is ​​constructed: Indicates the data obtained for each sampling;

[0098] b2), construct matrix: Y=[y(3) y(4) ... y(N)] T , Y represents the measured terminal voltage of the battery;

[0099] b3), solve the equation to obtain the value of κ: κ=(Φ T Φ) -1 Φ T Y;

[0100] b4), calculate U according to formula 7 o , R, a i , b i and c i , i=1, 2;

[0101] b5), calculate C according to formula 5 pi and R pi , i=1,2.

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 online real-time identification method for parameters of a battery equivalent model. The method comprises the steps of firstly establishing a second-order equivalent circuitmodel of the battery, then describing the second-order equivalent circuit model of the battery by utilizing a formula, then converting the formula into a differential method, and then obtaining parameters of the second-order equivalent circuit model of the battery through a parameter identification algorithm. According to the method, the second-order equivalent circuit model parameters of the battery can be identified online in real time, so that various state estimations of the battery can be realized, and the states of the battery include but are not limited to SOC, SOP (power state) and SOH. According to the method, the second-order equivalent circuit model parameters of any type of batteries can be identified, and the types of the batteries include but are not limited to disposable batteries, lead-acid batteries, lithium polymer batteries and the like.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to an online real-time identification method for parameters of a battery equivalent circuit model. Background technique [0002] The appearance of batteries has greatly promoted the popularization, practicality and lightness of electronic equipment. In order to analyze the characteristics of the battery under certain conditions, it is necessary to simulate and analyze the battery according to the battery model. The battery is a complex electrochemical-physical system with strong nonlinear and time-varying characteristics, which makes it extremely difficult to obtain the model parameters of the battery. Since the characteristics of the battery are affected by many factors such as temperature, battery state of charge (SOC) and battery state of life (SOH), the offline identification method is subject to many limitations and is only suitable for specific applications. At present, the...

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
IPC IPC(8): G01R31/388G01R31/392G01R31/367G01R31/396
CPCG01R31/388G01R31/392G01R31/367G01R31/396Y02E60/10
Inventor 王璐那娜王正君张永华李秋莹于洋
Owner 枣庄职业学院
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com