| 摘要 |
There is provided a secondary battery, in which a contact portion is formed on a bottom retainer to make contact with a bottom of a case, thus performing a tension function. The secondary battery includes an electrode assembly having a first electrode, a second electrode, and a separator interposed between the first and second electrodes. A case is configured to accommodate the electrode assembly therein, with an opening formed in a top of the case. A cap plate is configured to close the opening of the case. A bottom retainer is disposed on a bottom in the case. The bottom retainer includes a support portion to support the electrode assembly, and at least one contact portion to make contact with the bottom of the case. This configuration renders the contact portion to absorb external shocks, thus increasing durability, in addition to enhancing the safety of the secondary battery. |
