Title:
METHOD AND SYSTEM FOR ESTIMATING SOC OF HYBRID POWER IN-VEHICLE BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/253693
Kind Code:
A1
Abstract:
A method for estimating the SOC of a hybrid power in-vehicle battery, comprising: determining an SOC use interval of an entire vehicle use interval; in the SOC use interval, using an ampere-hour integral method to calculate a battery SOC; calibrating a battery OCV-SOC curve, selecting a calibration interval on the basis of the gradient of the battery OCV-SOC curve; when the charging/discharging throughput of a battery reaches a set threshold, controlling the SOC use interval of the entire vehicle use interval to be open, selecting a calibration point in the calibration interval, and determining the calibration interval of the SOC; calibrating the SOC via an SOC-OCV, and changing an SOC open interval into an SOC use interval when the SOC is calibrated. The method, by employing a combined scheme of ampere-hour integration and voltage high/low-end calibration, increases the precision in estimating the SOC of a power battery.
Inventors:
FAN HAIMEI (CN)
ZHANG WEI (CN)
LI CHUN (CN)
XIONG JINFENG (CN)
XU MAOWU (CN)
ZHU HENG (CN)
ZHANG JIANLI (CN)
ZHANG WEI (CN)
LI CHUN (CN)
XIONG JINFENG (CN)
XU MAOWU (CN)
ZHU HENG (CN)
ZHANG JIANLI (CN)
Application Number:
PCT/CN2020/121184
Publication Date:
December 23, 2021
Filing Date:
October 15, 2020
Export Citation:
Assignee:
HIGER BUS CO LTD (CN)
International Classes:
G01R31/3828
Foreign References:
| CN109975708A | 2019-07-05 | |||
| CN103344919A | 2013-10-09 | |||
| CN105093127A | 2015-11-25 | |||
| CN103499794A | 2014-01-08 | |||
| CN106501726A | 2017-03-15 | |||
| US20110156713A1 | 2011-06-30 |
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT AND TRADEMARK AGENCY LTD. (CN)
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