METHOD OF DIRECT RESISTANCE WELDING - SELF BRAZING OF ALUMINUM TO MOLYBDENUM PIN

摘要

A direct welding process for joining a current collector to a terminal pin in the construction of electrochemical cells is described. The resistance welding process utilizes increased current combined with an applied force to bond dissimilar metals with a melting temperature differential of preferably more than 500° C. Preferably, the method is used to bond the terminal pin to the cathode current collector. This method of attachment is suitable for either primary or secondary cells, particularly those powering implantable biomedical devices.

主权项

1. A method of creating a direct resistance bond between two dissimilar melting temperature metals, comprising the steps of:
a) providing a first metal; b) providing a second metal, having a higher melting temperature than that of the first metal; c) placing the first and second metals between a negative terminal welding electrode and a positive terminal welding electrode, the negative terminal welding electrode connected to a negative terminal of an electrical power source, the positive terminal welding electrode connected to a positive terminal of the electrical power source; and d) applying an electrical current and a mechanical force to the first and second metals between the negative and positive terminal electrodes to create a bond between the first and second metals.