Abstract: A lithium secondary battery based on one embodiment of the disclosed technology comprises an exterior member; and electrode cells disposed within the exterior member and each comprising a cathode, an anode, and a separator disposed between the cathode and the anode. Cathode tabs are disposed on a first side of the cathode. Anode tabs are disposed on a second side of the anode that is different from the first side. The cathode tabs and the anode tabs are formed asymmetrically on different sides.

Abstract: An electrode structure for a secondary battery includes a current collector, a first active material layer formed on at least one surface of the current collector, a second active material layer on the first active material layer, and a conductive intermediate layer interposed between the first active material layer and the second active material layer. The conductive intermediate layer has a resistance lower than each resistance of the first active material layer and the second active material layer. A lithium secondary battery including the electrode structure is provided.

Abstract: Provided is a tray capable of receiving batteries having various sizes. The tray includes a housing provided with a receiving portion for receiving a secondary battery. It also includes a blocking portion coupled to the housing to cross the receiving portion for adjusting the size of the receiving portion.

Abstract: Provided is a tray capable of receiving batteries having various sizes. The tray includes a housing provided with a receiving portion for receiving a secondary battery. It also includes a blocking portion coupled to the housing to cross the receiving portion for adjusting the size of the receiving portion.