Electrical connection system for vehicle
First Claim
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1. An electrical connection system for a vehicle, comprising:
- a voltage converter including an input terminal connected to a first power supply line to supply a first voltage for converting the first voltage into a second voltage to be output to vehicle-mounted loads through a second power supply line;
a first voltage supplier branched from the first power supply line for supplying the first voltage to each of the vehicle-mounted loads;
fuses provided between the voltage converter and each of the vehicle-mounted loads on the second power supply line;
a switch provided between the voltage converter and the fuses, with a terminal connected to the second power supply line, and with another terminal connected to a ground terminal;
a voltage detector provided between the voltage converter and the fuses for detecting a voltage to be supplied to the second power supply line;
an overvoltage protector configured to turn on the switch to connect the second power supply line to the ground terminal when the overvoltage protector decides an overvoltage to occur on the second power supply line due to occurring a short circuit between the first power supply line and the second power supply line at a vehicle-mounted load, based on a voltage to be detected by the voltage detector.
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Abstract
The electrical connection system includes a power source circuit for outputting a first voltage to operate a first load circuit. The power source circuit includes a conversion circuit for converting the first voltage into a second voltage lower than the first voltage. The system includes a second load circuit operative in response to the second voltage. The system includes a protection circuit for shunting the second load circuit with a threshold voltage between the first voltage and second voltage. The threshold voltage has identical influence on the second load circuit relative to the first voltage.
4 Citations
12 Claims
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1. An electrical connection system for a vehicle, comprising:
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a voltage converter including an input terminal connected to a first power supply line to supply a first voltage for converting the first voltage into a second voltage to be output to vehicle-mounted loads through a second power supply line;
a first voltage supplier branched from the first power supply line for supplying the first voltage to each of the vehicle-mounted loads;
fuses provided between the voltage converter and each of the vehicle-mounted loads on the second power supply line;
a switch provided between the voltage converter and the fuses, with a terminal connected to the second power supply line, and with another terminal connected to a ground terminal;
a voltage detector provided between the voltage converter and the fuses for detecting a voltage to be supplied to the second power supply line;
an overvoltage protector configured to turn on the switch to connect the second power supply line to the ground terminal when the overvoltage protector decides an overvoltage to occur on the second power supply line due to occurring a short circuit between the first power supply line and the second power supply line at a vehicle-mounted load, based on a voltage to be detected by the voltage detector. - View Dependent Claims (3)
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2. An electrical connection system for a vehicle, comprising:
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a voltage converter including an input terminal connected to a first power supply line to supply a first voltage for converting the first voltage into a second voltage to be output to vehicle-mounted loads through a second power supply line;
a first voltage supplier branched from the first power supply line for supplying the first voltage to each of the vehicle-mounted loads;
fuses provided between the voltage converter and each of the second vehicle-mounted loads on the second power supply line;
a switch provided between the voltage converter and the fuses, with a terminal connected to the second power supply line, and with another terminal connected to a ground terminal;
a voltage detector provided between the voltage converter and the fuses for detecting a voltage to be supplied to the second power supply line; and
an overvoltage protector configured to turn on the switch to connect the second power supply line to the ground terminal when the overvoltage protector decides an overvoltage to occur on the second power supply line due to occurring a short circuit between the first power supply line and the second power supply line at a vehicle-mounted load, based on a voltage to be detected by the voltage detector, wherein the second vehicle-mounted loads include electrical control units (ECU) for controlling vehicle-mounted electrical components.
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4. An electrical connection system, comprising:
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a power source circuit for outputting a first voltage to operate a first load circuit, the power source circuit including a conversion circuit for converting the first voltage into a second voltage lower than the first voltage;
a second load circuit operative in response to the second voltage; and
a protection circuit for shunting a current from the second load circuit when a threshold voltage through the second load circuit exceeds the second voltage, wherein the threshold voltage affects the second load circuit in substantially the same was as when the first voltage is applied to the second load circuit. - View Dependent Claims (5, 6, 7, 8)
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9. An electrical connection system for a vehicle, comprising:
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a voltage converter including a first terminal connected to a first power supply line and a second terminal connected to at least one vehicle mounted load via a second supply line, the voltage converter being configured to convert a first voltage from the first supply line into a second voltage for the second power supply line;
a first voltage supplier configured to supply the first voltage to at least one vehicle mounted load, the first voltage supplier being connected to the first power supply line;
at least one fuse disposed on the second power supply line between the voltage converter and the at least one vehicle mounted load; and
a switch with a first terminal connected to the second power supply line between the voltage converter and the at least one fuse, and a second terminal connected to a ground terminal;
wherein when a short circuit occurs between the first power supply line and the second power supply line substantially at the at least one vehicle mounted load, the switch is configured to connect the second power supply line to the ground terminal. - View Dependent Claims (10, 11, 12)
wherein the at least two fuses are disposed between the voltage converter and each of the at least two vehicle mounted loads. -
11. The system of claim 9, wherein the at least one vehicle-mounted load is at least one electrical control unit (ECU) configured to control vehicle-mounted electrical components.
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12. The system of claim 9, wherein the at least one fuse is configured to blow out when the at least fuse is subjected to the first voltage.
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Specification