Two part cold formed battery terminal
View Patent ↗A method of cold forming a two-part battery terminal and a two-part cold formed battery terminal comprising a cold formed lead or lead alloy slug having a male fastener protruding from a one side of the cold formed slug with a head portion of the fastener rotationally retained and embedded in the battery terminal by cold formed lead or lead alloy.
1. A method of cold forming a finished battery terminal of two different materials comprising:
cold forming a lead or lead alloy slug to form a stop and a chamber with a chamber opening therein;
inserting a male fastener having a head and a shank in the chamber of the slug of material until the shank extends out of the chamber opening in the slug and the head of the fastener is in retained engagement with the shoulder; and
cold forming the slug with the fastener head therein until the fastener head is embedded in the slug of material.
2. The method of claim 1 including the step of cold forming an annular fill-in lip around the chamber opening.
3. The method of claim 2 including the step of cold forming the annular lip radially and laterally into the chamber to encapsulate the fastener head therein.
4. The method of claim 1 including the step of inserting the fastener into the chamber until a fastener end face is beyond a plane extending through an exterior surface of the battery terminal.
5. The method of claim 4 including the step of forming a further chamber with an annular extension extending around an opening into the further chamber.
6. The method of claim 5 including the step of forming a set of concentric acid rings in the annular extension around the offset opening.
7. The method of claim 1 including the step of cold forming an extension for carrying a portion of the chamber and the opening on a top face of the battery terminal and for cold forming an extension for carrying acid rings on a bottom face of the slug.
8. The method of claim 1 wherein the step of placing a male fastener in the opening comprises placing a non-lead or non-lead alloyed metal bolt in the battery terminal.
9. The method of claim 1 including the step of inserting the male fastener comprises placing the male fastener with a protrusion thereon and cold forming the lead or lead slug alloy until the cold formed lead engages the protrusion to prevent rotation of the metal fastener as the metal fastener is secured to an external female connector.