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)
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:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
G01R31/396; G01R31/367
Foreign References:
CN105911478A | 2016-08-31 | |||
CN113657011A | 2021-11-16 | |||
CN113466723A | 2021-10-01 | |||
CN107066722A | 2017-08-18 | |||
CN112083336A | 2020-12-15 | |||
CN105891724A | 2016-08-24 |
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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