Title:
FAST SCREENING METHOD FOR USED BATTERIES USING CONSTANT-CURRENT IMPULSE RATIO (CCIR) CALIBRATION
Document Type and Number:
WIPO Patent Application WO/2022/165875
Kind Code:
A1
Abstract:
Used batteries are screened based on a measured Constant-Current Impulse Ratio. A used battery is charged using a Constant Current (CC) until a voltage target is reached, and the current integrated to obtain the CC chargeapplied, Qcc. Then the battery continues to be charged using a Constant Voltage (CV) of the voltage target until the charging current falls to a minimum current target. The current is integrated over the CV period to obtain the CV charge applied, Qcv. The measured CCIR is the ratio of Qcc to (Qcc+Qcv). The measured CCIR is input to a calibration curve function to obtain a modeled State of Health (SOH) value. The used battery is sorted for reuse or disposal based on the modeled SOH value. The calibration curve function is obtained by aging new batteries to obtain CCIR and SOH data that are modeled using a neural network.
Inventors:
XU MINJIE (CN)
ZHENG LIYA (CN)
SUN YAOFENG (CN)
ZHENG LIYA (CN)
SUN YAOFENG (CN)
Application Number:
PCT/CN2021/077752
Publication Date:
August 11, 2022
Filing Date:
February 24, 2021
Export Citation:
Assignee:
HONG KONG APPLIED SCIENCE & TECH RESEARCH INST CO LTD (CN)
International Classes:
G01R31/388; G01R31/382; G01R31/392
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Attorney, Agent or Firm:
CHINA TRUER IP (CN)
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