Samsung Sdi Co., Inc.

Masanori Kogure

Sang-Won Byun

Yong-Sam Kim

Dae-Won Han

Zin Min Park

Sung-Bae Kim

Byung-Kyu Ahn

Ki-Ho Kim

Ji-Hyoung Yoon

Seok-Joon Yoon

Sangsok Jung

Sungjae Cho

Kyung-Joon Kim

There is a provided a secondary battery capable of preventing unloading and rotating caused by possible vibration or shock by increasing a coupling force among the vent plate, the insulator, and the cap-down that compose the cap assembly of the secondary battery. To increase the coupling force among the vent plate, the insulator, and the cap-down, protrusions and corresponding grooves or holes, and grooves with step areas may be formed. Alternatively, a plurality of insulators may be formed in a divided form. A secondary battery with a reliable cap assembly can be implemented through such a structural change.

Secondary battery having an insulator with protrusions

A secondary battery has a depression having a thickness less than that of other portions of the periphery of a cap plate or a can. The depression includes a rupture section having a smallest thickness in the depression and further includes wrinkles between the rupture section and the periphery of the depression. Furthermore, the secondary battery is manufactured by a method including: a first coining step of forming the thickness of some portions of the cap plate or the can to be less than that of other peripheral portions thereof; a second coining step of forming wrinkles on the periphery of some portions where the first coining has been performed; and a third coining step of forming a rupture section having the smallest thickness in the depression on an inner side of the wrinkles.

Secondary battery and its method of manufacture

A rechargeable battery that prevents a concentration of stress on a coupling portion of a lead tab and a cap assembly at a time of bending the lead tab so as to not damage the coupling portion includes: an electrode assembly having a first electrode, a second electrode, and a separator interposed between the first and second electrodes; a case to receive the electrode assembly and having an open top portion; a cap assembly arranged on the top portion of the case; a lead tab having one end affixed to the cap assembly to electrically connect the cap assembly to the first electrode; and a stopper fixed to the cap assembly and having one end arranged on the lead tab, the stopper allowing a portion of the lead tab contacting the one end of the stopper to be bent when the lead tab is bent.

Battery module and its method of manufacture

A rechargeable battery includes: an electrode group including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; a case housing the electrode group; a cap-up electrically connected with the electrode group and combined with the case; a vent plate installed below the cap-up and having a notch; and a heterogeneous metallic member installed between the cap-up and the vent plate and made of a clad metal, whereby the stability and outputting of the rechargeable battery can be improved.

Rechargeable battery

A rechargeable battery includes an electrode array for generating current, a case for containing the electrode array and a cap electrically connected to the electrode array through the case. The rechargeable battery also includes a current interruption device having a connection to electrically connect the electrode array and the cap assembly and a magnet proximate the connection of the current interruption device for forming a magnetic field at the connection.

A rechargeable battery including an electrode assembly, a case, a cap assembly, and a core. The electrode assembly includes an anode, a cathode, and a separator interposed between the anode and the cathode. The case has a space for housing the electrode assembly. The cap assembly is connected to the case and electrically connected to the electrode assembly. The core is disposed inside the electrode assembly, and has a distance between the exterior and the center thereof at one end in a length direction that is greater than a distance between the exterior and the center thereof at the center in the length direction.

Growing community of inventors

Suwon-si, South Korea

Masanori Kogure