Undermolded and overmolded fuse joints
A novel fuse joint may be incorporated into a wire harness for use in solar energy installations. The novel fuse joint interfaces an in-line fuse with the middle portion of a wire segment at one end of the fuse, and with a wire end at the other end of the fuse. In this manner the number of connection points required to achieve in-line fuse functionality is decreased, thereby improving safety and conductivity over conventional in-line fuses. The fuse is undermolded, and the undermold is overmolded in situ, thereby yielding a double molded fuse joint. The novel fuse joint may be incorporated into a wire harness with conventional in-line fuses.
1. A fuse joint including:
A) a fuse;
B) a first wire segment having two ends and a middle portion there between, said middle portion attached directly to said fuse at a first connection point;
C) a second wire segment attached directly to said fuse at a second connection point, said second wire segment having two ends and a middle portion there between;
D) an undermolding surrounding said fuse; and
E) an overmolding surrounding said undermolding.
2. The fuse joint of claim 1 wherein said second connection point is positioned on one of said ends.
3. The fuse joint of claim 1 wherein said second connection point is positioned on one of said ends.
4. The fuse joint of claim 1 consisting of exactly two connection points.
5. The fuse joint of claim 1 further comprising a connector directly attached to said second wire segment at a third connection point.
6. The fuse joint of claim 5 consisting of exactly three connection points.
7. A wire harness comprising:
A) a plurality of joints each including two wire segments directly attached to a fuse, each wire segment having two ends and a middle portion, with one of said wire segments attached directly to said fuse at a middle portion;
B) an undermolding surrounding each fuse;
C) an overmolding surrounding each undermolding; and
D) a plurality of connectors upstream from said joints.
8. The wire harness of claim 7 wherein said wire segment is attached directly to a second fuse at an end of said wire segment.
9. The wire harness of claim 8 wherein the total quantity of said connectors equals the total quantity of fuses.
10. The wire harness of claim 7 wherein said wire segments include exposed wire, said undermolding fully encasing said exposed wire.
11. The wire harness of claim 10 wherein said overmolding fully encases said undermold.
12. The wire harness of claim 7 wherein said overmold encases an approximately 5 to 25 mm length of wire segment protruding from said undermold.
13. A method of manufacturing a fuse joint including the steps of:
A) connecting a middle portion of a wire to a fuse;
B) undermolding said fuse to form an undermold encasement; and
C) overmolding said undermold encasement.
14. The method of claim 13 wherein said undermolding is selected from a method selected from the group consisting of injection molding, compression molding, transfer molding, calendaring, extrusion and combinations thereof.
15. The method of claim 14 wherein said undermolding step is performed in situ.
16. The method of claim 13 wherein said overmolding is selected from a method selected from the group consisting of injection molding, compression molding, transfer molding, calendaring, extrusion and combinations thereof.
17. The method of claim 16 wherein said undermolding step is performed in situ.