US 2025/0233259 A1Published application

Secondary battery

AssigneeSK On Co., Ltd.

InventorsHae Ryong JEON, Soo Min PARK, Hyung Ju PAIK, Hoemin CHEONG, Won Tae HEO, Sun SHIN

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Abstract

A secondary battery includes a case that accommodates an electrode assembly; a cap plate sealing an opening of the case and including a first exhaust hole, and having a first polarity; an insulating member disposed on a lower portion of the cap plate and including a second exhaust hole with a larger diameter than the first exhaust hole, and positioned to correspond to the first exhaust hole; a current collecting member disposed on a lower portion of the insulating member and electrically connected to the electrode assembly, and having a second polarity different from the first polarity; a guide member disposed in a lower portion of the second exhaust hole and electrically connected to the current collecting member; and a short-circuit member including a conductive material and disposed in the guide member to move to come into contact with the cap plate in response to pressure generated within the case.

Claims16

Dependent claims

A secondary battery comprising:

a case structured to accommodate an electrode assembly;
a cap plate configured to seal an opening of the case and including a first exhaust hole to allow a gas to pass through, the cap plate having a first electrical polarity for the second battery;
an insulating member disposed on a lower portion of the cap plate and including a second exhaust hole positioned to correspond to a position of the first exhaust hole to allow the gas to pass through the first and second exhaust holes, the second exhaust hole having a larger diameter than the first exhaust hole;
a current collecting member disposed on a lower portion of the insulating member and electrically connected to the electrode assembly, the current collecting member having a second electrical polarity of the secondary battery that is different from the first electrical polarity;
a guide member disposed in a lower portion of the second exhaust hole and electrically connected to the current collecting member;
and
a short-circuit member including a conductive material and movably disposed in the guide member, the short-circuit member being configured to move upward to come into contact with the cap plate in response to a pressure generated within the case.

4 more elements

A secondary battery comprising:

a case structured to accommodate an electrode assembly;
a cap plate configured to seal an opening of the case and including a first exhaust hole, the cap plate having a first polarity;
an insulating member disposed on a lower portion of the cap plate and including a second exhaust hole positioned to corresponding to a position of the first exhaust hole, the second exhaust hole having a larger diameter than the first exhaust hole;
a current collecting member disposed on a lower portion of the insulating member and electrically connected to the electrode assembly, the current collecting member having a second polarity that is different from the first polarity;
a guide member disposed in a lower portion of the second exhaust hole;
a short-circuit member including a conductive material and movably disposed in the guide member, the short-circuit member being configured to move upward to come into contact with the cap plate in response to a pressure generated within the case;
and
a short-circuit tab including a conductive material and coupled to a lower portion of the short-circuit member, the short-circuit tab being configured to come into contact with the current collecting member when the short-circuit member comes into contact with the cap plate.

5 more elements

Dependencies are inferred from the claim text.