Abstract: A secondary battery according to one embodiment of the present disclosure may includes an electrode assembly a first battery case that houses the electrode assembly and a second battery case that houses the first battery. The second battery case may be formed to have a different color from that of the first battery case.

Abstract: The present invention relates to an electrode and a method for manufacturing the electrode, and more particularly, to an electrode capable of preventing a bending phenomenon of an electrode active material coating or a delamination or cracking phenomenon of an electrode active material from occurring and a method for manufacturing the electrode. The electrode according to the present invention includes a base collector made of a metal material and a unit electrode attached to the base collector, wherein the unit electrode includes a unit collector made of a metal material and having a size less than that of the base collector and an electrode active material applied on one surface of the unit collector.

Abstract: A battery module includes a plurality of first battery modules and a plurality of second battery modules; a battery case that houses the battery modules and includes a plurality of cross beams for partitioning between the plurality of first battery modules and between the plurality of second battery modules; a plurality of first slave BMSs positioned at one side of the plurality of first battery modules facing the plurality of second battery modules; a plurality of second slave BMSs that are positioned at one side of the plurality of second battery modules facing the plurality of first battery modules; a plurality of first reflected wave absorbers arranged on one side of the plurality of first battery modules facing the plurality of second battery modules; and a plurality of second reflected wave absorbers arranged on one side of the plurality of second battery modules facing the plurality of first battery modules.