Rechargeable battery
AssigneeSamsung SDI Co., Ltd.
InventorsSae-Weon Roh, Sung-Ho Song, Jung-Hyun Park
Life of this patent
Estimating the term…
Abstract
A rechargeable battery includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, a can in which the electrode assembly is accommodated, the can including an opening at one side, the opening being hermetically sealed by a cap plate, and a top plate on the cap plate. The top plate includes a first welding unit and a second welding unit that are coupled to the cap plate, and a third welding unit that is between the first welding unit and the second welding unit. The first welding unit is connected to the cap plate and includes first through third welding points. The first through third welding points collectively forming a triangular shape.
Claims15
A rechargeable battery, comprising:
- an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate;
- a can in which the electrode assembly is accommodated, the can including an opening at one side, the opening being hermetically sealed by a cap plate;
- a top plate on the cap plate, the top plate having a rectangular shape including two short sides and two long sides;
- and
- a lead plate on the top plate,
- wherein:
- the top plate includes:
- a first welding unit and a second welding unit at which an nickel or nickel alloy surface of the top plate is ultrasonically welded to an aluminum or aluminum alloy surface of the cap plate, the first welding unit and the second welding unit being at opposite end areas of the top plate, and
- a third welding unit, the third welding unit being an area of the top plate between the first welding unit and the second welding unit to which the lead plate is welded, and
- the first welding unit includes first through third welding points at which the nickel or nickel alloy surface of the top plate is ultrasonically welded to the aluminum or aluminum alloy surface of the cap plate, the first through third welding points collectively forming an equilateral triangular shape in which the first, second, and third welding points are respectively spaced apart from each other by a same first distance, at least one of the first, second, and third welding points being spaced apart from an adjacent short side of the top plate by a second distance that is one-half of the first distance.
A rechargeable battery, comprising:
- an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate;
- a can in which the electrode assembly is accommodated, the can including an opening at one side, the opening being hermetically sealed by a cap plate;
- a top plate on the cap plate, the top plate having a rectangular shape including two short sides and two long sides;
- and
- a lead plate on the top plate, and
- wherein:
- the top plate includes:
- a first welding unit and a second welding unit at which an nickel or nickel alloy surface of the top plate is ultrasonically welded to an aluminum or aluminum alloy surface of the cap plate, the first welding unit and the second welding unit being at opposite end areas of the top plate, and
- a third welding unit, the third welding unit being an area of the top plate between the first welding unit and the second welding unit at which the lead plate is welded to the top plate,
- the first welding unit includes first through third welding points at which the nickel or nickel alloy surface of the top plate is ultrasonically welded to the aluminum or aluminum alloy surface of the cap plate, the first through third welding points collectively forming an equilateral triangular shape in which the first, second, and third welding points are respectively spaced apart from each other by a same first distance, at least one of the first, second, and third welding points being spaced apart from an adjacent short side of the top plate by a second distance that is one-half of the first distance,
- the second welding unit is coupled to the cap plate and includes fourth through sixth welding points, the fourth through sixth welding points collectively forming an equilateral triangular shape in which the fourth, fifth, and sixth welding points are respectively spaced apart from each other by the first distance, at least one of the fourth, fifth, and sixth welding points being spaced apart from an opposite adjacent short side of the top plate by the second distance.
Dependencies are inferred from the claim text.