Circuit having bus bars and junction box containing the circuit
First Claim
1. An electrical circuit having two bus bars welded to each other at a weld, wherein a first one of said two bus bars is formed of a material having an electrical conductivity selected from (a) in the range of from about 10 to about 60% and (b) not less than about 60% and the second of said two bus bars is formed of a material having an electrical conductivity of not less than about 60%, and wherein at least one of said bus bars is tin-plated and at said weld said bus bars are joined through a tin-plating layer.
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Accused Products
Abstract
An electrical circuit for use in an electrical junction box of a vehicle, has two bus bars welded to each other at a weld. A first one of the bus bars is formed of a material having an electrical conductivity selected from (a) in the range of from about 10 to about 60% and (b) not less than about 60%, and the second of the two bus bars is formed of a material having an electrical conductivity of not less than about 60%. At least one of the bus bars is tin-plated and at the weld the bus bars are joined through a tin-plating layer. Appropriate selection of the bus bar material in view of current loads is achieved, and good welding results.
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Citations
21 Claims
- 1. An electrical circuit having two bus bars welded to each other at a weld, wherein a first one of said two bus bars is formed of a material having an electrical conductivity selected from (a) in the range of from about 10 to about 60% and (b) not less than about 60% and the second of said two bus bars is formed of a material having an electrical conductivity of not less than about 60%, and wherein at least one of said bus bars is tin-plated and at said weld said bus bars are joined through a tin-plating layer.
- 8. An electrical junction box containing an electrical circuit having two bus bars welded to each other at a weld, wherein a first one of said two bus bars is formed of a material having an electrical conductivity selected from (a) in the range of from about 10 to about 60% and (b) not less than about 60% and the second of said two bus bars is formed of a material having an electrical conductivity of not less than about 60%, and wherein at least one of said bus bars is tin-plated and at said weld said bus bars are joined through a tin-plating layer.
- 11. An electrical circuit having two bus bars welded to each other at a weld, wherein a first one of said two bus bars is formed of brass without tin-plating and the second one of said two bus bars is formed of a material selected from tinplated brass and brass without tin-plating.
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15. An electrical junction box containing an electrical circuit having two bus bars welded to each other at a weld, wherein a first one of said two bus bars is formed of brass without tin-plating and the second one of said two bus bars is formed of a material selected from tin-plated brass and brass without tin-plating.
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18. A method of making an electrical circuit comprising the step of welding together two bus bars by resistance welding so as to join the two bus bars at a weld, wherein a first one of said two bus bars is formed of a material having an electrical conductivity selected from (a) in the range of from about 10 to about 60% and (b) not less than about 60% and the second of said two bus bars is formed of a material having an electrical conductivity of not less than about 60%, and wherein at least one of said bus bars is tin-plated and at said weld said bus bars are joined through a tin-plating layer.
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19. A method of making an electrical circuit comprising the step of welding together two bus bars by resistance welding so as to join the two bus bars at a weld, wherein a first one of said two bus bars is formed of brass without tin-plating and the second one of said two bus bars is formed of a material selected from tinplated brass and brass without tin-plating.
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20. An electrical junction box for a vehicle having a casing and mounted within said casing a first circuit module adapted to be connected to at least one electrical connector in use of said electrical junction box and a second circuit module selected from
(i) a fuse module adapted to be connected to electrical fuses in use of said electrical junction box, (ii) a relay module adapted to be connected to electrical relays in use of said electrical junction box, and (iii) a combined fuse and relay module adapted to be connected to electrical fuses and electrical relays in use of said electrical junction box, each of said first and second circuit modules having at least one bus bar and an insulating body carrying said at least one bus bar, two of said bus bars, respectively on first and second circuit modules, being welded to each other at a weld to form electrical connection between said first and second circuit modules, wherein a first one of said two bus bars is formed of a material having an electrical conductivity selected from (a) in the range of from about 10 to about 60% and (b) not less than about 60% and the second of said two bus bars is formed of a material having an electrical conductivity of not less than about 60%, and wherein at least one of said bus bars is tin-plated and at said weld said bus bars are joined through a tin-plating layer.
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21. An electrical junction box for a vehicle having a casing and mounted within said casing a first circuit module adapted to be connected to at least one electrical connector in use of said electrical junction box and a second circuit module selected from
(i) a fuse module adapted to be connected to electrical fuses in use of said electrical junction box, (ii) a relay module adapted to be connected to electrical relays in use of said electrical junction box, and (iii) a combined fuse and relay module adapted to be connected to electrical fuses and electrical relays in use of said electrical junction box, each of said first and second circuit modules having at least one bus bar and an insulating body carrying said at least one bus bar, two of said bus bars, respectively on first and second circuit modules, being welded to each other at a weld to form electrical connection between said first and second circuit modules, wherein a first one of said two bus bars is formed of brass without tinplating and the second one of said two bus bars is formed of a material selected from tin-plated brass and brass without tin-plating.
Specification