Electrode assembly for lithium ion secondary battery and lithium ion secondary battery using the same
AssigneeSamsung SDI Co., Ltd.
InventorsJae Min, Won Han, Jin Kim
Life of this patent
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Abstract
A lithium ion secondary battery and a jelly-roll type electrode assembly in a lithium ion secondary battery including a can and a cap assembly together with the electrode assembly. The electrode assembly is made up of two electrodes; a ceramic separator coating on at least one surface among the four surfaces of the two electrode plates and located between the two opposing electrodes; and porous polymer resin separation films placed between the electrode plates at certain locations where the plates are bent to relatively small radii of curvature and outward from an innermost portion of a core, and/or at terminal ends of the electrode plates, respectively.
Claims23
A jelly-roll type electrode assembly in a lithium ion secondary battery including a can and a cap assembly together with the electrode assembly, the electrode assembly comprising:
- two electrodes;
- a ceramic separator formed on at least one surface among the four surfaces of the two electrodes and disposed between the two opposing electrodes;
- and
- porous separation films interposed at portions of the electrodes which have relatively small radii of curvature in the vicinity of an innermost portion of a core of the electrode assembly, between the two opposing electrodes, respectively.
A jelly-roll type electrode assembly in a lithium ion secondary battery including a can and a cap assembly together with the electrode assembly, the electrode assembly comprising:
- two electrodes:
- a ceramic separator formed on at least one surface among the four surfaces of the two electrodes and interposed between the two opposing electrodes;
- and
- porous separation films interposed at portions of the electrodes which have relatively small radii of curvature near an innermost portion of a core of the electrode assembly, between the two opposing electrodes, respectively, and extending toward the core beyond a terminal portion of each of the electrodes including between portions having a minimum radius of curvature and the innermost portion of the core.
A lithium ion secondary battery including a jelly-roll type electrode assembly, a can and a cap assembly, comprising:
- two electrodes;
- a ceramic separator formed on at least one surface of the two electrodes and interposed between the two opposing electrodes;
- and
- porous separation films interposed at portions of the electrodes which have relatively small radii of curvature near an innermost portion of a core of the electrode assembly, between the two opposing electrodes, respectively.
An electrode assembly in a lithium ion battery, comprising:
- two opposing electrodes facing one another;
- an active portion formed on each electrode between the two electrodes;
- a ceramic separator formed on a surface of at least one of the electrodes so as to be between the two electrodes;
- and
- a porous separation film between the two electrodes at a bent portion of the facing electrodes to prevent exfoliation of the active portion and the ceramic separator.
Dependencies are inferred from the claim text.