Fusible link busbar for starter and alternator with dual battery application

1. An electrical coupling for transferring power between a pair of batteries, an alternator, and a starter in a vehicle, the electrical coupling comprising:

a housing including at least one busbar retainer; and

a busbar having a first conductive portion, a second conductive portion spaced from the first conductive portion, and a fuse portion connecting the first and second conductive portions, the first conductive portion having at least two spaced apart junctions and the second conductive portion having at least one junction;

wherein the busbar is sized and configured to fit in the housing and engage the at least one busbar retainer in at least first position and a second position in which the busbar is rotated relative to the first position by a prescribed angle about an axis that is perpendicular to an imaginary plane defined by the junctions.

2. The electrical coupling of claim 1 , wherein the axis intercepts a polygon having a corners defined by the junctions.

3. The electrical coupling of claim 2 , wherein the polygon is a square.

4. The electrical coupling of claim 1 , wherein the first portion of the busbar has two arms joined at an intersection and angled relative to one another.

5. The electrical coupling of claim 4 , wherein the fuse portion extends from the intersection and is angled acutely relative to each of the two arms.

6. The electrical coupling of claim 4 , wherein each arm has a distal end opposite the intersection, and wherein the fuse portion extends from the distal end of one of the two arms and is generally parallel with the other of the two arms.

7. The electrical coupling of claim 4 , wherein each arm has a distal end opposite the intersection, and

wherein the least two junctions of first conductive portion include a first junction at the intersection, a second junction at the distal end of one of the arms, and a third junction at the distal end of the other of the arms.

8. The electrical junction of claim 1 , wherein the busbar is shaped like one of a letter U, a letter Z, an arrow, and a plus-sign.

9. An electrical system for a vehicle comprising:

an electric junction including a busbar defining a first conductive portion having at least two spaced apart first junctions, a second conductive portion spaced from the first conductive portion and defining at least one second junction, and a fuse portion joining the first conductive portion to the second conductive portion;

at least one battery coupled to one of the first junctions; and

an alternator coupled to the second junction and operable to charge the at least one battery via the electric junction.

10. The electrical system of claim 9 , wherein the electric junction is spaced apart from terminals of the at least one battery.

11. The electrical system of claim 9 , wherein the at least one battery includes a first battery and a second battery spaced apart from the first battery, the first and second batteries coupled to separate first junctions.

12. The electrical system of claim 11 , wherein the electric junction is approximately midway between the first and second batteries.

13. The electrical system of claim 11 , wherein a first terminal of the first battery is coupled to the busbar by a first wire and a second terminal of the second battery is coupled to the busbar by a second wire, and wherein the first wire is approximately equal in length to the second wire.

14. The electrical system of claim 11 , wherein the at least two first junctions include at least three first junctions,

wherein the electrical system further comprising a starter, and

wherein the starter and first and second batteries are coupled to separate first junctions.

15. An electrical system for a vehicle comprising:

a first battery;

a second battery spaced from the first battery;

an electric junction disposed between the first and second batteries;

a first wire coupling the first battery to the electric junction;

a second wire coupling the second battery to the second junction, the second wire of substantially equal length as the first wire;

an alternator, coupled to the electric junction and operable to recharge the first and second batteries via the first and second wires; and

a starter coupled to the electric junction and operable to draw power from the first and second batteries via the first and second wires.

16. The electrical system of claim 15 , wherein the electric junction includes a busbar having a first conductive portion, a second conductive portion spaced from the first conductive portion, and a fuse portion connecting the first and second conductive portions, the first conductive portion having three spaced apart first junctions and the second conductive portion having one second junction.

17. The electrical system of claim 16 , wherein the first and second batteries and the starter are coupled to separate first junctions, and wherein the alternator is coupled to the second junction.

18. The electrical system of claim 16 , further comprising a housing including at least one busbar retainer; and

wherein the busbar is sized and configured to fit in the housing and engage the at least one busbar retainer in at least a first position and a second position in which the busbar is rotated relative to the first position by a prescribed angle about an axis that is perpendicular to an imaginary plane defined by the junctions.

19. The electrical system of claim 16 , wherein the first portion of the busbar has two arms orthogonal to one another and joined at an intersection, and wherein the fuse portion extends from the intersection and is angled acutely relative to each of the two arms.

20. The electrical system of claim 16 , wherein the first and second junctions are arranged at corners of an, imaginary square.