Secondary battery having safety vent
AssigneeSamsung SDI Co., Ltd.
InventorSangsok Jung
Life of this patent
Estimating the term…
Abstract
A secondary battery has a safety vent, and the safety vent has an asymmetric structure and provides a substantial opening for the battery, instead of having a local crack, to rapidly vent to atmosphere in order to prevent the secondary battery from bursting when the internal pressure of a battery increases excessively or external impact is applied thereto. The secondary battery includes an electrode assembly charging/discharging functions, a can housing the electrode assembly, a cap assembly that includes a cap plate closing up an open part of the can, and a safety vent having an asymmetric track shape that is provided in the cap plate of the cap assembly.
Claims16
A secondary battery, comprising:
- an electrode assembly performing charging and discharging functions;
- a can housing the electrode assembly;
- a cap assembly which includes a cap plate closing up an open side of the can;
- and
- a safety vent having an indented track shape recessed into the cap plate of the cap assembly, the indented track shape having spaced-apart coupling portions asymmetrically oriented about a center line of the track that traverses a shorter width of the cap plate to join together a first arc portion symmetrically aligned at diametrically opposite ends of the track shape with a second arc portion which has a different curvature compared to that of the first arc portion, an entirety of an inner portion defined by the indented track shape being configured to be flat.
A secondary battery, comprising:
- an electrode assembly performing charging and discharging functions;
- a can housing the electrode assembly;
- a cap assembly which includes a cap plate closing an open side of the can, and the cap plate having a pair of shorter sides disposed opposite to each other and a pair of longer sides disposed opposite to each other;
- and
- a safety vent having an indented periphery recessed into the cap plate, the indented periphery comprising first and second arc portions, and spaced-apart coupling portions asymmetrically positioned relative to a center line traversing the longer sides of the cap plate, the coupling portions joining together the first arc portion and the second arc portion disposed to face the first arc portion, said second arc portion having a smaller curvature compared to that of the first arc portion, an entirety of an inner portion defined by the indented periphery of the safety vent being configured to be flat.
Dependencies are inferred from the claim text.