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Title:
MULTI-INNOVATION RECURSIVE BAYESIAN ALGORITHM-BASED BATTERY MODEL PARAMETER IDENTIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/105104
Kind Code:
A1
Abstract:
A multi-innovation recursive Bayesian algorithm-based battery model parameter identification method, comprising the following steps: step 1) measuring terminal voltage and load current data of a lithium ion battery within a certain period of time by means of an intermittent constant current discharge method, and determining an OCV-SOC functional relationship thereof by means of a polynomial fitting method; step 2) determining a dual-polarized equivalent circuit model of the lithium ion battery, and establishing a system equation that represents the relationship between a battery parameter identification vector and system output; and step 3), establishing an identification process of a multi-innovation recursive Bayesian algorithm. According to the method, an ARX model for parameter identification of the lithium ion battery is established, the innovation correction technology is used to correct results at a previous moment, and innovation length parameters are introduced on the basis of the multi-innovation identification method, which overcomes the influence of bad data on parameter estimation and improves the parameter estimation accuracy. It may be seen from the parameter identification results that the present method has high identification accuracy and has engineering value.

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Inventors:
LI JUNHONG (CN)
LI LEI (CN)
GU JUPING (CN)
HUA LIANG (CN)
LIU HUIXIA (CN)
YANG YI (CN)
LI ZHENG (CN)
JIANG ZEYU (CN)
Application Number:
PCT/CN2021/089498
Publication Date:
May 27, 2022
Filing Date:
April 25, 2021
Export Citation:
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Assignee:
UNIV NANTONG (CN)
International Classes:
G01R31/367; G06N7/00
Foreign References:
CN112526348A2021-03-19
CN110286332A2019-09-27
CN108647434A2018-10-12
CN110378571A2019-10-25
CN107844627A2018-03-27
CN109669132A2019-04-23
CN110275113A2019-09-24
CN111098755A2020-05-05
US20140210418A12014-07-31
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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