SECONDARY BATTERY

Various embodiments of the present invention relate to a secondary battery, and the objective of the present invention is to provide a secondary battery, which has drop-impact resistance, by providingan electrode assembly having a relatively thick inner circumferential tap and a relatively thin outer circumferential tap. To this end, disclosed is a secondary battery, which comprises an electrodeassembly comprising: an anode plate having an inner circumferential tap formed at a wound front end thereof; a separator covering the anode plate; and a cathode plate having an outer circumferential tap formed at a wound distal end thereof. 本发明的各种实施例涉及二次电池，并且本发明的目的是通过提供具有相对厚的内周接线片和相对薄的外周接线片的电极组件来提供具有抗跌落冲击性的二次电池。为此，公开了一种二次电池，其包括电极组件，该电极组件包括：具有形成在其卷绕前端的内周接线片的阳极板；覆盖阳极板的隔板；以及具有形成在其卷绕末端的外周接线片的阴极板。