Dual voltage architecture for automotive electrical systems
First Claim
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1. A dual voltage automotive electrical system, comprising:
- a generator for generating a first nominal voltage on a first voltage bus;
a bi-directional DC/DC converter for converting said first nominal voltage to a second nominal voltage on a second voltage bus, said second nominal voltage being lower than said first nominal voltage; and
a battery, coupled to said first voltage bus and selectably coupled to said second voltage bus, said battery capable of supplying power to loads on both said first voltage bus and said second voltage bus.
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Abstract
A dual voltage automotive electrical system includes a generator for generating a first nominal voltage on a first voltage bus and a bi-directional DC/DC converter for converting the first nominal voltage to a second nominal voltage on a second voltage bus, the second nominal voltage being lower than said first nominal voltage. A battery is coupled to the first voltage bus and selectably coupled to the second voltage bus, and is capable of supplying power to loads on both the first voltage bus and the second voltage bus.
70 Citations
15 Claims
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1. A dual voltage automotive electrical system, comprising:
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a generator for generating a first nominal voltage on a first voltage bus;
a bi-directional DC/DC converter for converting said first nominal voltage to a second nominal voltage on a second voltage bus, said second nominal voltage being lower than said first nominal voltage; and
a battery, coupled to said first voltage bus and selectably coupled to said second voltage bus, said battery capable of supplying power to loads on both said first voltage bus and said second voltage bus. - View Dependent Claims (2, 4, 5, 8)
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- 3. The system of claim 3, further comprising a switching mechanism coupled between said battery and said second voltage bus, wherein said switching mechanism causes said battery to supply power to loads on said second voltage bus whenever the actual voltage on said second voltage bus drops below the voltage on said low voltage tap.
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9. A dual voltage automotive electrical system, comprising:
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a generator for generating a first nominal voltage on a first voltage bus;
a bi-directional DC/DC converter for converting said first nominal voltage to a second nominal voltage on a second voltage bus, said second nominal voltage being lower than said first nominal voltage;
a battery, said battery having a ground terminal, a high voltage terminal coupled to said first voltage bus, and a low voltage tap selectably coupled to said second voltage bus; and
a switching mechanism, coupled between said low voltage tap of said battery and said second voltage bus, said switching mechanism causing said battery to supply power to loads on said second voltage bus whenever the actual voltage on said second voltage bus drops below the voltage on said low voltage tap. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification