Patent · US Active

Apparatus and method for estimating parameter of secondary battery

US9097773B2 · kind B2 · utility

5Cited by

3References

23Claims

0Family size

Assignee

LG CHEM, LTD. · KR

Inventors

Won-Tae Joe · Daejeon, KR
Geun Chang Chung · Daejeon, KR
Sun-Young Cha · Daejeon, KR

Key dates

Filing date	Oct 29, 2014
Grant date	Aug 4, 2015
Priority date	—
Expiry date	Oct 29, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Disclosed is an apparatus and method for estimating a parameter of a secondary battery. The apparatus includes a sensor configured to measure an open circuit voltage (OCVm) of the secondary battery at a first depth of discharge (DOD′), the open circuit voltage (OCVm) corresponding to a difference between a predetermined original cathode voltage (Vc,o) at the first depth of discharge (DOD′) and an anode voltage (Va), and a control unit configured to calculate an anode voltage (Va) from the original cathode voltage (Vc,o) and the open circuit voltage (OCVm), determining that the original anode voltage (Va,o) is identical to the anode voltage (Va), determining a second depth of discharge (DOD″) corresponding to the original anode voltage (Va,o), and determining capacity degradation (Δcapa) of the secondary battery according to a difference between the first depth of discharge (DOD′) and the second depth of discharge (DOD″).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.