Title:
ULTRASONIC GUIDED WAVE IN-SITU DETECTION METHOD FOR STATE OF CHARGE OF SOFT PACKAGE LITHIUM-ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/078196
Kind Code:
A1
Abstract:
An ultrasonic guided wave in-situ detection method for the state of charge (SOC) of a soft package lithium-ion battery. Two circular piezoelectric plates (2) are symmetrically adhered to the surface of a lithium-ion battery (3) at a certain distance by using a coupling agent, an arbitrary wave function generator (5) is controlled to generate a five-cycle sinusoidal signal modulated by a Hanning window, the circular piezoelectric plate (2) located on the left side of the surface of the battery (3) is excited, an ultrasonic guided wave is generated inside the battery and is received by the circular piezoelectric plate (2) located on the right side of the surface of the battery (3). The received guided wave signal is processed to extract a time-domain feature parameter (transit time) of a guided wave. The detection of the SOC of the soft package lithium-ion battery is implemented according to a correspondence between the guided wave feature parameter (transit time) and the SOC. The lithium-ion battery (3) is detected by using a group of circular piezoelectric plates (2) in a one-excitation and one-reception mode, thereby implementing in-situ detection of the SOC of the soft package lithium-ion battery (3) without recording external parameters such as current and voltage.
Inventors:
LYU YAN (CN)
ZHANG LIANGHENG (CN)
SONG GUORONG (CN)
GAO JIE (CN)
HE CUNFU (CN)
WU BIN (CN)
ZHANG LIANGHENG (CN)
SONG GUORONG (CN)
GAO JIE (CN)
HE CUNFU (CN)
WU BIN (CN)
Application Number:
PCT/CN2022/128499
Publication Date:
May 11, 2023
Filing Date:
October 31, 2022
Export Citation:
Assignee:
UNIV BEIJING TECHNOLOGY (CN)
International Classes:
G01N29/07; G01R31/387; G01R31/367
Foreign References:
| CN114200326A | 2022-03-18 | |||
| CN113189506A | 2021-07-30 | |||
| CN108872868A | 2018-11-23 | |||
| CN109565089A | 2019-04-02 | |||
| CN106680730A | 2017-05-17 | |||
| CN106772063A | 2017-05-31 | |||
| CN111880107A | 2020-11-03 | |||
| CN103411567A | 2013-11-27 | |||
| US20160223498A1 | 2016-08-04 | |||
| US20120304771A1 | 2012-12-06 |
Attorney, Agent or Firm:
BEIJING SIHAI TIANDA INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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