Method and apparatus for measuring a parameter of a vehicle electrical system
First Claim
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1. A method for determining cable resistance of wiring of an electrical system of a vehicle which includes a battery, a load, and a first cable connecting a first side of the battery to a first side of the load, and a second cable connecting a second side of the battery to a second side of the load, comprising:
- coupling a first Kelvin connector to the first side of the load of the vehicle, the first Kelvin connector having a first connector and a second connector;
coupling a second Kelvin connector to the second side of the load of the vehicle, the second Kelvin connector having a third connector and a fourth connector;
coupling a first voltage sensor connector to the first side of the battery of the vehicle;
coupling a second voltage sensor connector to the second side of the battery of the vehicle;
applying a forcing function between the first connector of the first Kelvin connector and the third connector of the second Kelvin connector;
measuring a first parameter of the electrical system between the second connector of the first Kelvin connector and the second voltage sensor connector in response to the applied forcing function;
measuring a second parameter of the electrical system between the first voltage sensor connector and the second voltage sensor connector in response to the applied forcing function;
measuring a third parameter of the electrical system between the fourth connector of the second Kelvin connector and the second voltage sensor connector in response to the applied forcing function;
measuring a fourth parameter of the electrical system between the first voltage sensor connector and the second voltage sensor connector in response to the applied forcing function;
determining the cable resistance of the first cable as a function of the first parameter and the second parameter; and
determining the cable resistance of the second cable as a function of the third parameter and the fourth parameter.
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Abstract
An apparatus for measuring electrical parameters for an electrical system measures a first and second parameters of the electrical system between connections to the electrical system. A processor determines a third electrical parameter of the electrical system as a function of the first parameter and the second parameter.
439 Citations
24 Claims
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1. A method for determining cable resistance of wiring of an electrical system of a vehicle which includes a battery, a load, and a first cable connecting a first side of the battery to a first side of the load, and a second cable connecting a second side of the battery to a second side of the load, comprising:
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coupling a first Kelvin connector to the first side of the load of the vehicle, the first Kelvin connector having a first connector and a second connector; coupling a second Kelvin connector to the second side of the load of the vehicle, the second Kelvin connector having a third connector and a fourth connector; coupling a first voltage sensor connector to the first side of the battery of the vehicle; coupling a second voltage sensor connector to the second side of the battery of the vehicle; applying a forcing function between the first connector of the first Kelvin connector and the third connector of the second Kelvin connector; measuring a first parameter of the electrical system between the second connector of the first Kelvin connector and the second voltage sensor connector in response to the applied forcing function; measuring a second parameter of the electrical system between the first voltage sensor connector and the second voltage sensor connector in response to the applied forcing function; measuring a third parameter of the electrical system between the fourth connector of the second Kelvin connector and the second voltage sensor connector in response to the applied forcing function; measuring a fourth parameter of the electrical system between the first voltage sensor connector and the second voltage sensor connector in response to the applied forcing function; determining the cable resistance of the first cable as a function of the first parameter and the second parameter; and determining the cable resistance of the second cable as a function of the third parameter and the fourth parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 20, 21, 22, 23, 24)
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13. An apparatus for determining cable resistance of wiring of an electrical system of a vehicle which includes a battery, a load, and a first cable connecting a first side of the battery to a first side of the load, and a second cable connecting a second side of the battery to a second side of the load, comprising:
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a first Kelvin connector to couple the first side of the load, the first Kelvin connector having a first connector and a second connector; a second Kelvin connector to couple the second side of the load, the second Kelvin connector having a third connector and a fourth connector; a first voltage sensor connector to couple the first side of the battery; a second voltage sensor connector to couple to the second side of the battery; and measurement circuitry configured to measure a first parameter of the electrical system between the second connector of the first Kelvin connector and the second voltage sensor connector in response to the applied forcing function, measure a second parameter of the electrical system between the first voltage sensor connector and the second voltage sensor connector in response to the applied forcing function, measure a third parameter of the electrical system between the fourth connector of the second Kelvin connector and the second voltage sensor connector in response to the applied forcing function, measure a fourth parameter of the electrical system between the first voltage sensor connector and the second voltage sensor connector in response to the applied forcing function, and responsively determine the cable resistance of the first cable as a function of the first parameter and the second parameter, and determine the cable resistance of the second cable as a function of the third parameter and the fourth parameter. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification