Patent ID: 11923567
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A battery cell for evaluating an internal short circuit, comprising:
a first electrode including a metal current collector, a first electrode mixture layer partially disposed on one or both surfaces of the metal current collector, and a first electrode tab, wherein:
the first electrode includes a coated part region, in which the first electrode mixture layer is disposed on the one or both surfaces of the metal current collector,
the first electrode tab protrudes in one direction in the coated part region,
the first electrode mixture layer is not disposed on the first electrode tab, and
the first electrode includes a non-coated part region, on which the first electrode mixture layer is not disposed;
a first sub-separator configured to cover the non-coated part region of the first electrode and be formed to have an area greater than an area of the non-coated part region;
a first short circuit electrode configured to be formed at a location corresponding to the non-coated part region of the first electrode and be formed to be protruded in one direction in the coated part region of the first electrode;
a main separator configured to be interposed between the first electrode and a second electrode to cover the coated part region of the first electrode and a coated part region of the second electrode;
a second short circuit electrode configured to be formed at a location corresponding to the non-coated part region of the first electrode and be formed to be protruded in one direction in the coated part region of the second electrode;
a second sub-separator configured to cover the non-coated part region of the second electrode and be formed to have an area greater than that of the non-coated part region; and
the second electrode including an another metal current collector, a second electrode mixture layer disposed on one or both surfaces of the another metal current collector, and the second electrode tab, wherein:
the second electrode includes the coated part region, in which the second electrode mixture layer is disposed on the one or both surfaces of the another metal current collector,
the second electrode tab, which protrudes in one direction in the coated part region,
the second electrode mixture layer is not disposed on the second electrode tab, and
the second electrode includes a non-coated part region, on which the second electrode mixture layer is not disposed,
wherein the first and second sub-separators are removable sub-separators configured to be removed or partially taken out of the battery cell, thereby inducing an internal short circuit state of the battery cell by connecting the first and second short circuit electrodes.