Apparatus and method for estimating power of secondary blended comprising blended cathode material

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United States of America Patent

PATENT NO 9389278
APP PUB NO 20150051855A1
SERIAL NO

14531365

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Abstract

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Disclosed is an apparatus and method for estimating a power of a secondary battery comprising a blended cathode material. The apparatus according to the present invention estimates a power of a secondary battery comprising a blended cathode material in which at least a first cathode material and a second cathode material are blended, the apparatus comprising a discharging means for discharging the secondary battery under conditions of a plurality of discharge rates (c-rate) different from each other, a sensor means for measuring a plurality of discharge termination voltages (Vf) corresponding to the conditions of the plurality of discharge rates, and a control means for approximating a correlation between the plurality of discharge rates and the plurality of discharge termination voltages by a two-dimensional linear equation, calculating a maximum discharge rate (Cmax) of the secondary battery corresponding to a minimum discharge voltage (Vmin) using the linear equation, and estimating a maximum power (Pmax) of the secondary battery from the calculated maximum discharge rate.

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Patent Owner(s)

  • LG CHEM, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cha, Sun-Young Daejeon, KR 27 292
Joe, Won-Tae Daejeon, KR 45 398

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