Electrode assembly having enhanced safety and lithium secondary battery comprising same
AssigneeLG Energy Solution, Ltd.
InventorHye Ran Jung
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Abstract
An electrode assembly of the present invention comprises a cathode active material layer, a cathode current collector, a separator, an anode current collector, and an anode active material layer, which are stacked in order, wherein the current collectors have a plurality of through-holes formed to allow communication between the upper surface and the lower surface of the current collector. The electrode assembly of the present invention has the effect of preventing a rapid temperature increase if an internal short caused by damage to the separator occurs.
Claims11
An electrode assembly comprising a positive electrode active material layer, a positive electrode current collector, a separator, a negative electrode current collector, and a negative electrode active material layer sequentially stacked in an order listed,
- wherein the positive and negative current collectors include a plurality of through holes, and each of the through holes perforates through the positive and negative current collectors from an upper surface to a lower surface of the positive and negative current collectors,
- wherein a part of a positive electrode mixture of the positive electrode active material layer or a negative electrode mixture of the negative electrode active material layer is filled in a part of an inside of the through hole, and
- wherein a thickness of the positive electrode mixture or the negative electrode mixture in the through hole is 1% to 50% of a thickness of the current collector.
Dependencies are inferred from the claim text.