BUS BAR FOR BATTERY PACK AND BATTERY PACK

摘要

PROBLEM TO BE SOLVED: To suppress occurrence of a gap among a connection bus bar, positive electrode terminals and negative electrode terminals.SOLUTION: A connection bus bar 27 comprises: a pair of first connection portions 31 provided to first end portions 27a; a pair of second connection portions 32 provided to second end portions 27b; and a coupling portion 33 coupling the first end portions 27a and the second end portions 27b. Each of the pair of first connection portions 31 and the pair of second connection portions 32 comprises: a protrusion portion protruding toward each of the positive electrode terminals 22 and the negative electrode terminals 23; and a connection opening portion provided on a leading end portion of the protrusion portion. The protrusion portions are joined to the positive electrode terminals 22 and the negative electrode terminals 23 by thin wall portions being subjected to welding such as laser welding in a state that the connection openings are caused to face the positive electrode terminals 22 and the negative electrode terminals 23 and surfaces of curved surface portions are brought into contact with the positive electrode terminals 22 and the negative electrode terminals 23.