# US 2014/0193675 A1 · Secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193675 A1 - Document ID: US20140193675A1 - Status: Published application - Kind: A1 - Application number: 13/802,019 - Filed: 2013-03-13 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Robert Bosch GmbH; Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd.; Robert Bosch GmbH - Inventors: Dukjung KIM - Web page: https://patentgrep.com/patent/US20140193675A1 ## CPC - H01M 50/578: in response to pressure - H01M 50/627: Filling ports - H01M 50/3425: {in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member} - H01M 50/55: on the same side of the cell - H01M 2200/103: Fuse - H01M 2200/20: Pressure-sensitive devices - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A secondary battery including an electrode assembly; first and second collector plates connected to respective first and second electrodes of the electrode assembly; a case accommodating the electrode assembly, the first collector plate, and the second collector plate; a cap plate sealing an opening of the case; a first electrode terminal electrically connected to the first collector plate and passing through the cap plate; a second electrode terminal electrically connected to the second collector plate and passing through the cap plate; and a short-circuit member electrically connected to the first collector plate and passing through the cap plate, the short-circuit member including a duct part in communication with an inside of the case; and a deformable part covering a top portion of the duct part and being deformable by a gas pressure inside the case to electrically connect the first electrode to the second electrode. ## Claims ### Claim 1 A secondary battery comprising: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a first collector plate connected to the first electrode; a second collector plate connected to the second electrode; a case accommodating the electrode assembly, the first collector plate, and the second collector plate; a cap plate sealing an opening of the case; a first electrode terminal electrically connected to the first collector plate and passing through the cap plate; a second electrode terminal electrically connected to the second collector plate and passing through the cap plate; and a short-circuit member electrically connected to the first collector plate and passing through the cap plate, the short-circuit member comprising: a duct part in communication with an inside of the case; and a deformable part covering a top portion of the duct part and being deformable by a gas pressure inside the case to electrically connect the first electrode to the second electrode. ### Claim 2 (depends on 1) The secondary battery of claim 1, wherein the short-circuit member is arranged adjacent to the second electrode terminal and between the first electrode terminal and the second electrode terminal. ### Claim 3 (depends on 1) The secondary battery of claim 1, wherein the deformable part is a round part that is convexly formed toward the inside of the case and is inverted toward an outside of the case when the deformable part is deformed. ### Claim 4 (depends on 1) The secondary battery of claim 1, wherein the cap plate is electrically insulated from the first electrode terminal, the second electrode terminal, and the short-circuit member. ### Claim 5 (depends on 1) The secondary battery of claim 1, wherein the first collector plate includes a first connection part connected to the first electrode and having a fuse part, and a first extension part bent and extending from a top portion of the first connection part, the first extension part extending parallel with the cap plate to an end adjacent to the second collector plate. ### Claim 6 (depends on 5) The secondary battery of claim 5, wherein the fuse part is adjacent to a corner portion at which the first extension part is bent from the first connection part, and is melted when an overcurrent flows. ### Claim 7 (depends on 5) The secondary battery of claim 5, wherein the first extension part includes a first electrode terminal hole receiving the first electrode terminal, a coupling hole receiving the short-circuit member, a vent hole at a location corresponding to a safety vent of the cap plate, and an electrolyte injection hole at a location corresponding to an electrolyte injection part of the cap plate, and wherein the vent hole and the electrolyte injection hole are between the first electrode terminal hole and the coupling hole. ### Claim 8 (depends on 7) The secondary battery of claim 7, wherein the coupling hole is adjacent to the end of the first extension part. ### Claim 9 (depends on 1) The secondary battery of claim 1, further comprising a fastening terminal fastened to the second electrode terminal, wherein the fastening terminal includes a short-circuit extension part extending over an upper side of the deformable part. ### Claim 10 (depends on 9) The secondary battery of claim 9, wherein, when the deformable part is deformed, it makes contact with a bottom surface of the short-circuit extension part. ### Claim 11 (depends on 9) The secondary battery of claim 9, further comprising an upper insulation member between the fastening terminal and the cap plate, the upper insulation member including a first receiving groove receiving the fastening terminal, and a second receiving groove receiving the short-circuit member protruding to an outside of the cap plate. ### Claim 12 (depends on 1) The secondary battery of claim 1, further comprising a lower insulation member between the cap plate and each of the first collector plate and the second collector plate, wherein the lower insulation member has penetration holes formed at positions corresponding to the short-circuit member and a first electrode terminal hole, a safety vent, an electrolyte injection part, and a second electrode terminal hole, which are formed in the cap plate. ### Claim 13 (depends on 1) The secondary battery of claim 1, further comprising a fastening terminal fastened to the first electrode terminal, and an upper insulation member between the fastening terminal and the cap plate.