Title:
METHOD AND SYSTEM FOR ESTIMATING EQUILIBRIUM STATE OF BATTERY PACK OF NEW ENERGY VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/088591
Kind Code:
A1
Abstract:
Provided are a method and system for estimating an equilibrium state of a battery pack of a new energy vehicle. The method comprises: obtaining an actual battery cell voltage difference measured for the battery pack of the new energy vehicle, and obtaining one or more working condition parameters of working conditions for measuring the actual battery cell voltage difference (S202), wherein the actual battery cell voltage difference is the difference between the maximum battery cell voltage and the minimum battery power voltage in the battery pack; determining an expected battery cell voltage difference according to a model based on the one or more working condition parameters (S204); determining a compensated battery cell voltage difference according to the actual battery cell voltage difference and the expected battery cell voltage difference (S206); and estimating the equilibrium state of the battery pack of the new energy vehicle according to the compensated battery cell voltage difference (S208).
Inventors:
ZHANG YIZHEN (CN)
SHANG JIN (CN)
ZHANG XIONG (CN)
XU YONGGANG (CN)
SHANG JIN (CN)
ZHANG XIONG (CN)
XU YONGGANG (CN)
Application Number:
PCT/CN2021/081745
Publication Date:
May 05, 2022
Filing Date:
March 19, 2021
Export Citation:
Assignee:
GUANGZHOU AUTOMOBILE GROUP CO (CN)
International Classes:
H02J7/00
Foreign References:
| CN103779938A | 2014-05-07 | |||
| CN111049153A | 2020-04-21 | |||
| CN111469713A | 2020-07-31 | |||
| CN101262138A | 2008-09-10 | |||
| US10416238B2 | 2019-09-17 | |||
| CN110293881A | 2019-10-01 | |||
| US10059217B2 | 2018-08-28 |
Attorney, Agent or Firm:
SHENZHEN RONDA PATENT AND TRADEMARK LAW OFFICE (CN)
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