Secondary battery and secondary battery assembly

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 at least one of the first, second and third openings so as to electrically connect between an external device and the bare cell,
• wherein said first opening has no direct physical contact with the second and third openings,
• wherein said second opening has no direct physical contact with the first and third openings,
• wherein said third opening has no direct physical contact with the first and second openings, and
• wherein the distance between the first and second openings is two times greater than from the third opening to an outer surface of the housing, which is most adjacent to the third opening,
• 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 at least one of the first, second, and third openings, and
• wherein the leg portion of the terminal portion is exposed to the outside through the first opening is integrally connected to another leg portion of the terminal portion exposed to the outside through the third opening.

A secondary battery assembly, comprising:

• two secondary batteries, each secondary battery comprising:
• a bare cell;
• a housing surrounding the bare cell;
• an opening formed on any one side of the housing, the opening 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;
• and
• a terminal portion exposed to the outside of the housing through the first and third openings and integrally formed with the first and third openings so as to electrically connect between an external device and the bare cell,
• wherein a connection pin that electrically connects the two secondary batteries by connecting between the terminal portion of each secondary battery,
• wherein said first opening has no direct physical contact with the second and third openings of each secondary battery,
• wherein said second opening has no direct physical contact with the first and third openings of each secondary battery,
• wherein said third opening has no direct physical contact with the first and second openings of each secondary battery, and
• wherein the distance between the first and second openings in each secondary battery is two times greater than from the third opening in each secondary battery to an outer surface of the housing, which is most adjacent to the third opening in each secondary battery.