STRUCTURE OF BATTERY UNIT

摘要

A battery unit is provided which includes a battery made of a stack of a plurality of cells each of which is equipped with electrode tabs serving as a positive terminal and a negative terminal. The electrode tabs are broken down into first electrode tabs and second electrode tabs. The first electrode tabs are the electrode tabs of every adjacent two of the cells which are joined together through a weld. The second electrode tabs are the electrode tabs of the cells each of which is joined to a bus bar through a weld without being connected to any of the electrode tabs. The first and second electrode tabs each have a bent portion which lies between a body of the cell and the weld and works as a vibration absorber to ensure the stability in forming the weld during a welding operation.

主权项

1. A battery unit comprising:
a battery which includes a stack of a plurality of laminated-type cells each of which is equipped with electrode tabs serving as a positive terminal and a negative terminal, respectively, each of the electrode tabs having a base end leading to a body of a corresponding one of the cells; first electrode tabs that are the electrode tabs of every adjacent two of the cells which have portions laid on one another and joined together through a weld, each of the first electrode tabs including a first bent portion which continues from the base end of the first electrode tab and approaches close to another of the adjacent two cells, the first bent portion of each of the first electrode tabs lying between the base end and the weld of the first electrode tab; and second electrode tabs that are the electrode tabs of the cells each of which has a portion joined to a bus bar through a weld without being connected to any of the electrode tabs, each of the second electrode tabs including a second bent portion which continues from the base end of the second electrode tab and lies between the base end and the weld of the second electrode tab.