# US 2014/0154560 A1 · Secondary battery and secondary battery assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154560 A1 - Document ID: US20140154560A1 - Status: Published application - Kind: A1 - Application number: 13/838,928 - Filed: 2013-03-15 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Kwang-Soo Bae - Web page: https://patentgrep.com/patent/US20140154560A1 ## CPC - H01M 50/503: characterised by the shape of the interconnectors - H01M 50/296: characterised by terminals of battery packs (terminals of batteries H01M50/543) - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - 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 and a secondary battery assembly are provided. The secondary battery includes a bare cell, a housing, an opening and a terminal portion. The housing surrounds the bare cell. The opening is formed any one side of the housing, and includes a first opening, a second opening and a third opening formed adjacent to any one of the first and second openings. The terminal portion has at least one portion exposed to the outside of the housing through the opening so as to electrically connect between an external device and the bare cell. Accordingly, the two secondary batteries can be used by being easily connected to each other. ## Claims ### Claim 1 A secondary battery, comprising: a bare cell; a housing surrounding the bare cell; an opening formed on any one side of the housing, said opening including a first opening, a second opening and a third opening, said third opening is formed adjacent to any one of the first and second openings; and a terminal portion having at least one portion exposed to the outside of the housing through the opening so as to electrically connect between an external device and the bare cell. ### Claim 2 (depends on 1) The secondary battery of claim 1, wherein the third opening is positioned adjacent to the first opening. ### Claim 3 (depends on 2) The secondary battery of claim 2, wherein the terminal portion includes: a first terminal portion exposed to the outside through the first and third openings, and integrally formed with the first and third openings; and a second terminal portion exposed to the outside through the second opening. ### Claim 4 (depends on 2) The secondary battery of claim 2, wherein a long side of long and short sides of the third opening is formed to make an angle with a long side of long and short sides of the first opening. ### Claim 5 (depends on 2) The secondary battery of claim 2, wherein the first and third openings are formed perpendicular to each other. ### Claim 6 (depends on 5) The secondary battery of claim 5, wherein the first and third openings are placed to form a cross shape, T-shape or L-shape. ### Claim 7 (depends on 1) The secondary battery of claim 1, wherein the first and second openings are positioned in parallel to each other. ### Claim 8 (depends on 1) The secondary battery of claim 1, wherein the distance between the first and second openings is two times greater than that from the third opening to an outer surface of the housing, which is most adjacent to the third opening. ### Claim 9 (depends on 2) The secondary battery of claim 2, wherein the opening further includes a fourth opening formed adjacent to the second opening of the first and second openings. ### Claim 10 (depends on 1) The secondary battery of claim 1, wherein the terminal portion includes a main body portion positioned inside the housing, and a leg portion extended from the main body portion so as to be exposed to the outside through the opening. ### Claim 11 (depends on 10) The secondary battery of claim 10, wherein the leg portion of the terminal portion exposed to the outside through the first opening is integrally connected to the leg portion of the terminal portion exposed to the outside through the third opening. ### Claim 12 (depends on 10) The secondary battery of claim 10, wherein the terminal portion further includes a connection portion electrically connecting the main body portion and the bare cell to each other. ### Claim 13 (depends on 10) The secondary battery of claim 10, wherein the leg portion has a holding groove formed therein. ### Claim 14 (depends on 10) The secondary battery of claim 10, wherein the leg portion has a pair of extending portions bent to have elasticity. ### Claim 15 A secondary battery assembly, comprising: two secondary batteries each including a bare cell; a housing surrounding the bare cell; an opening formed on any one side of the housing having a first opening, a second opening and a third opening, said third opening formed adjacent to any one of the first and second openings; a terminal portion having at least one portion exposed to the outside of the housing through the opening so as to electrically connect between an external device and the bare cell; and a connection pin electrically connecting between the two secondary batteries by connecting between the terminal portions. ### Claim 16 (depends on 15) The secondary battery assembly of claim 15, wherein the two secondary batteries are positioned so that the openings are adjacent to each other. ### Claim 17 (depends on 15) The secondary battery assembly of claim 15, wherein the distance between the first and second openings is two times greater than that from the third opening to an outer surface of the housing, which is most adjacent to the third opening. ### Claim 18 (depends on 15) The secondary battery assembly of claim 15, wherein the third opening of any one of the two secondary batteries is formed adjacent to the first opening, and the third opening of the other of the two secondary batteries is formed adjacent to the second opening. ### Claim 19 (depends on 18) The secondary battery assembly of claim 18, wherein the connection pin electrically connects the terminal portion positioned in the second opening of any one of the two secondary batteries to the terminal portion positioned in the first opening of the other of the two secondary batteries. ### Claim 20 (depends on 15) The secondary battery assembly of claim 15, wherein the first, second and third openings each have a rectangular and the first and third openings are placed forming a cross shape, T-shape or L-shape.