Patent ID: 9246145
Filing Date: 2016-01-26
CPC Classification: H01M,Y02E,Y10T

Claim Text:
1. A combined battery, comprising: first and second units, each including a plurality of flat-type cells, each flat-type cell having a positive electrode tab and a negative electrode tab, wherein the flat-type cells have two major surfaces and a thickness, wherein in each of the first and second units, the plurality of flat-type cells are laminated by stacking the flat-type cells in a lamination direction substantially perpendicular to the major surfaces and electrically connected to one another at a respective welding part that connects a positive electrode tab of a first flat-type cell to a negative electrode tab of a second flat-type cell, and portions of the positive electrode tab of the first flat-type cell and the negative electrode tab of the second flat-type cell that are electrically connected to one another by the welding part are offset from a negative electrode tab of the first flat-type cell, a positive electrode tab of the second flat-type cell, and a positive electrode tab and a negative electrode tab of every other flat-type cell in each unit when viewed down into the lamination direction, and wherein the first and second units are further electrically connected to one another in series with a unit welding part connecting a positive electrode tab of a flat-type cell in one of the first and second units and a negative electrode tab of a flat-type cell in the other of the first and second units, and portions of the positive electrode tab of the flat-type cell in the one of the first and second units and the negative electrode tab of the flat-type cell in the other of the first and second units that are electrically connected to one another by the unit welding part are offset from a negative electrode tab of the flat-type cell in the one of the first and second units, a positive electrode tab of the flat-type cell in the other of the first and second units, and a positive electrode tab and a negative electrode tab of every other flat-type cell in the first and second units, when viewed down into the lamination direction.