A battery module, comprising: a base plate ; a plurality of battery cells , having a pair of electrode leads drawn therefrom in the same direction, disposed on the base plate and arranged to form two rows; wherein in case of a pair of battery cells arranged in a same column, electrode leads of the battery cell arranged in the first row and electrode leads of the battery cell arranged in the second row extend in opposite directions; wherein the electrode leads of the battery cell arranged in the first row and the electrode leads of the battery cell arranged in the second row are disposed alternately; a plurality of sockets electrically connected to electrode leads of the battery cells ; and wherein the socket includes: a first support electrically connected to the electrode leads of the battery cell arranged in the first row; and a second support electrically connected to the electrode leads of the battery cell arranged in the second row and electrically insulating from the first support ; and a plurality of connecting bars inserted into a part of the plurality of sockets , wherein one side of a connecting bar is inserted into a first support and another side of a connecting bar is inserted into a second support to electrically connect the first support and the second support , so that the plurality of battery cells are connected in a combined serial and parallel pattern. a base plate ; a plurality of battery cells , having a pair of electrode leads drawn therefrom in the same direction, disposed on the base plate and arranged to form two rows; wherein in case of a pair of battery cells arranged in a same column, electrode leads of the battery cell arranged in the first row and electrode leads of the battery cell arranged in the second row extend in opposite directions; wherein the electrode leads of the battery cell arranged in the first row and the electrode leads of the battery cell arranged in the second row are disposed alternately; a plurality of sockets electrically connected to electrode leads of the battery cells ; and wherein the socket includes: a first support electrically connected to the electrode leads of the battery cell arranged in the first row; and a second support electrically connected to the electrode leads of the battery cell arranged in the second row and electrically insulating from the first support ; and a plurality of connecting bars inserted into a part of the plurality of sockets , wherein one side of a connecting bar is inserted into a first support and another side of a connecting bar is inserted into a second support to electrically connect the first support and the second support , so that the plurality of battery cells are connected in a combined serial and parallel pattern. a first support electrically connected to the electrode leads of the battery cell arranged in the first row; and a second support electrically connected to the electrode leads of the battery cell arranged in the second row and electrically insulating from the first support ; and a plurality of connecting bars inserted into a part of the plurality of sockets , wherein one side of a connecting bar is inserted into a first support and another side of a connecting bar is inserted into a second support to electrically connect the first support and the second support , so that the plurality of battery cells are connected in a combined serial and parallel pattern. <EOS>