Abstract: A battery pack includes at least one battery module and a pair of pack end plates arranged to hold the at least one battery module therebetween in a predetermined direction. Each battery module includes a plurality of battery cells arranged in alignment with each other in the predetermined direction and a pair of module end plates arranged to hold the battery cells therebetween in the predetermined direction. Moreover, the strength of the pack end plates in the predetermined direction is set to be higher than or equal to a minimum required strength to hold the at least one battery module therebetween in a predetermined state where the battery cells of the at least one battery module have deteriorated. The strength of the module end plates of the at least one battery module in the predetermined direction is set to be lower than the strength of the pack end plates.

Abstract: A battery pack includes at least one battery module and a pair of pack end plates arranged to hold the at least one battery module therebetween in a predetermined direction. Each battery module includes a plurality of battery cells arranged in alignment with each other in the predetermined direction and a pair of module end plates arranged to hold the battery cells therebetween in the predetermined direction. Moreover, the strength of the pack end plates in the predetermined direction is set to be higher than or equal to a minimum required strength to hold the at least one battery module therebetween in a predetermined state where the battery cells of the at least one battery module have deteriorated. The strength of the module end plates of the at least one battery module in the predetermined direction is set to be lower than the strength of the pack end plates.

Abstract: An assembled battery comprises: multiple cells 30 each having external terminals including a negative electrode terminal 50 and a positive electrode terminal; a bus bar 40 which connects the external terminal of one of two adjacent cells 30 and that of the other thereof; an electrically-conductive connecting member 70 which connects the external terminal and the bus bar 40 by welding to the external terminal and the bus bar 40; a welding portion 80 welded to the bus bar 40 and the connecting member 70; and a welding portion 82 welded to the external terminal and the connecting member 70. The connecting member 70 comprises an intervening portion 70b connected to the welding portion 80, and a main body portion 70a extending from the intervening portion 70b to the welding portion 82. The intervening portion 70b has a thickness that is smaller than that of the main body portion 70a.

Abstract: An assembled battery comprises: multiple cells 30 each having external terminals including a negative electrode terminal 50 and a positive electrode terminal; a bus bar 40 which connects the external terminal of one of two adjacent cells 30 and that of the other thereof; an electrically-conductive connecting member 70 which connects the external terminal and the bus bar 40 by welding to the external terminal and the bus bar 40; a welding portion 80 welded to the bus bar 40 and the connecting member 70; and a welding portion 82 welded to the external terminal and the connecting member 70. The connecting member 70 comprises an intervening portion 70b connected to the welding portion 80, and a main body portion 70a extending from the intervening portion 70b to the welding portion 82. The intervening portion 70b has a thickness that is smaller than that of the main body portion 70a.

Abstract: An assembled battery comprises: multiple cells 30 each having external terminals including a negative electrode terminal 50 and a positive electrode terminal 60; a bus bar 40 configured to connect the external terminal of one of two adjacent cells 30 to the external terminal of the other of these two adjacent cells 30; a connecting member 70 welded to the external terminal and the bus bar 40 so as to electrically connect the external terminal and the bus bar 40; a welding portion 80 at which the external terminal and the connecting member 70 are welded; and a welding portion 82 at which the bus bar 40 and the connecting member 70 are welded. The external terminal has a region that is at a distance from an outer package as compared with a portion of the connecting member 70 that is adjacent to the welding portion 80.