A busbar cutting unit (30) for cutting a bridge portion (16a) of a busbar plate having a plurality of busbars (17) coupled to each other with the bridge portion so that the busbars serve as electric circuits respectively, includes an attachment portion to which the busbar plate Is attached, a reception portion (38) that receives bridge pieces formed by cutting the bridge portion of the busbar plate when the bridge portion of the busbar plate is pressed down toward the attachment portion, and a welding portion (37) that Is made of an electrical insulation material and is welded to the bridge pieces received in the reception portion.
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