Patent ID: 7588858
Filing Date: 2009-09-15
Classification: B23K,H01M,Y02E,Y02P,Y10T

Abstract:
1. A method of manufacturing a weldment, the method comprising: providing a pedestal to support two or more objects being welded, the pedestal having a plurality of layers stacked on top of each other, the plurality of layers including (a) a support layer having an upper support surface and made of a refractory metal with a melting point higher than melting points of the two or more objects being welded, (b) a heat release layer with thermal conductivity higher than that of the support layer, and (c) an adherence layer spacing the support layer from the heat release layer; providing a lithium-ion secondary battery cell having an aluminum-laminate film coating and a solid polymer electrolyte, the secondary battery cell capable of charging and discharging electricity; connecting a plate electrode to the secondary battery cell to conduct electricity during charging and discharging; and welding metal plates to the electrode by performing electric resistance welding by pressing a welding rod, the metal plates having a melting point higher than that of the electrode or which are thicker than the electrode and have the same melting point, wherein,