Back to results
US 8,541,119 B2Granted
Lithium secondary battery and method of controlling short resistance thereof
AssigneeSamsung SDI Co., Ltd.
InventorsJoong-Heon Kim, Cheol-Ho Park, Jin-Uk Lee
Life of this patent
Estimating the term…
Abstract
Provided is a lithium secondary battery including a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a polymer electrolyte composition having a polymer electrolyte, a non-aqueous organic solvent, and a lithium salt. The content of the polymer electrolyte is 9 to 20 wt %, based on the total weight of the polymer electrolyte composition.
Claims8
A method of controlling a short resistance of a secondary battery, comprising:
- measuring an open circuit voltage (VOC) of the secondary battery;
- calculating a short circuit resistance (RSC) using the measured open circuit voltage (VOC);
- calculating a heating value W according to time using the calculated short circuit resistance (RSC);
- calculating a time having the maximum instantaneous heating value, using the change in heating value (W) according to time,
- determining the short circuit resistance (RSC) value at the time having the maximum instantaneous heating value as a critical short resistance;
- and
- adjusting an amount of a polymer electrolyte used in the secondary battery, according to the determined critical short resistance.
4 more elements
Dependencies are inferred from the claim text.