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Title:
STATE OF CHARGE UPDATE METHOD BASED ON POWER CHARACTERISTIC OF LITHIUM ION BATTERY ELECTROCHEMICAL MODEL
Document Type and Number:
WIPO Patent Application WO/2023/201781
Kind Code:
A1
Abstract:
A state of charge update method based on a power characteristic of a lithium ion battery electrochemical model. The method comprises: S1, acquiring an initial state of charge, and a constant-amplitude electric-current sequence; S2, acquiring initial battery state information, and performing simulation according to a lithium ion battery electrochemical model, so as to obtain a battery port voltage at each moment within a preset time period; S3, according to the battery port voltage and an electric-current sequence amplitude, obtaining a port power corresponding to the initial state of charge; S4, adjusting the initial state of charge and the electric-current sequence amplitude, and repeating steps S1 to S3, so as to obtain a current amplitude-state of charge-port power curved surface; S5, fitting the current amplitude-state of charge-port power curved surface into a plane equation; and S6, acquiring, by using the plane equation, a current amplitude corresponding to a port power and a state of charge, and updating the state of charge according to the current amplitude and the preset time period.

Inventors:
CHEN QIXIN (CN)
CHEN YUANBO (CN)
GU YUXUAN (CN)
GUO HONGYE (CN)
ZHENG KEDI (CN)
LV RUIKE (CN)
Application Number:
PCT/CN2022/091037
Publication Date:
October 26, 2023
Filing Date:
May 05, 2022
Export Citation:
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Assignee:
UNIV TSINGHUA (CN)
International Classes:
G01R31/396; G01R31/367
Foreign References:
CN105911478A2016-08-31
CN113657011A2021-11-16
CN113466723A2021-10-01
CN107066722A2017-08-18
CN112083336A2020-12-15
CN105891724A2016-08-24
Other References:
APURBA, SAKTI ET AL.: "Enhanced representations of lithium-ion batteries in power systems models and their effect on the valuation of energy arbitrage applications", JOURNAL OF POWER SOURCES, vol. 342, 22 December 2016 (2016-12-22), XP029895641, ISSN: 0378-7753, DOI: 10.1016/j.jpowsour.2016.12.063
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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