Lithium ion secondary battery
AssigneeSamsung SDI Co., Ltd.
InventorSangseok Jung
Life of this patent
Estimating the term…
Abstract
A lithium ion secondary battery in which at least one step portion is formed on an upper surface of a cap plate, and at least one step portion is formed on a lower or first surface of a battery part opposite to the upper or first surface of the cap plate so that the at least two step portions are complementary. The complementary step portions of the cap plate of the bare cell and the battery part provided at an upper part of the cap plate result in easy coupling of the battery part to the bare cell and stable maintenance of the coupling between the battery part and the bare cell. The coupling structure results in greater ease in performing subsequent manufacturing processes and protects the bare cells coupled to the battery part from dislodging.
Claims17
A lithium ion secondary battery comprising:
- an electrode assembly including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode;
- a can to house the electrode assembly;
- a cap assembly that includes a cap plate and an electrode terminal insulated from the cap plate and is coupled to the can to close an open part of the can;
- and
- a cap cover coupled to the cap assembly, the cap cover comprising:
- a plate body that has at least one through hole and a step portion formed on a first surface of the plate body;
- a first lead plate that is formed on the first surface of the plate body opposite the cap plate and is connected to the electrode terminal;
- a second lead plate that is formed on a second surface of the plate body and is connected to external terminals, and
- a connecting conductor that extends through the through hole to connect the first lead plate and the second lead plate,
- wherein step portions are oppositely formed on a surface of the cap cover and on a first surface of the cap plate and are engaged with each other.
A lithium ion secondary battery, comprising:
- at least one cap assembly, which includes a cap plate connectable to at least one bare cell;
- and
- a battery part connectable to the at least one cap assembly, the battery part comprising:
- a plate body that has at least one through hole and a step portion formed on a first surface of the plate body;
- a first lead plate that is formed on the first surface of the plate body opposite the cap plate and is connected to the electrode terminal;
- a second lead plate that is formed on a second surface of the plate body and is connected to external terminals, and
- a connecting conductor that extends through the through hole to connect the first lead plate and the second lead plate,
- wherein the at least one cap assembly has at least one fixing rib and/or at least one groove formed on the cap plate, and the battery part has a corresponding structure for each of the at least one cap assemblies to engage the at least one fixing rib and/or the at least one groove formed on the cap plate.
Dependencies are inferred from the claim text.