BATTERY SYSTEM BI-STABLE RELAY CONTROL
First Claim
1. A battery system, comprising:
- a first battery configured to be coupled to an electrical system, wherein the first battery comprises a first battery chemistry;
a second battery coupled in parallel with the first battery and configured to be selectively coupled to the electrical system via a bi-stable relay, wherein the second battery comprises a second battery chemistry that has a higher coulombic efficiency than the first battery chemistry, and the bi-stable relay is configured to couple the second battery to the electrical system during regenerative braking to enable the second battery to capture a majority of power generated during regenerative braking, and the bi-stable relay is configured to maintain a coupling of the second battery to the electrical system when a vehicle transitions from a key-on position to a key-off position.
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Accused Products
Abstract
A 12 volt automotive battery system includes a first battery coupled to an electrical system, and the first battery includes a first battery chemistry. Further, the 12 volt automotive battery system includes a second battery coupled in parallel with the first battery and selectively coupled to the electrical system via a bi-stable relay. The second battery includes a second battery chemistry that has a higher coulombic efficiency than the first battery chemistry. Additionally, the bi-stable relay couples the second battery to the electrical system during regenerative braking to enable the second battery to capture a majority of the power generated during regenerative braking. Furthermore, the bi-stable relay maintains a coupling of the second battery to the electrical system when the vehicle transitions from a key-on position to a key-off position.
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Citations
24 Claims
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1. A battery system, comprising:
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a first battery configured to be coupled to an electrical system, wherein the first battery comprises a first battery chemistry; a second battery coupled in parallel with the first battery and configured to be selectively coupled to the electrical system via a bi-stable relay, wherein the second battery comprises a second battery chemistry that has a higher coulombic efficiency than the first battery chemistry, and the bi-stable relay is configured to couple the second battery to the electrical system during regenerative braking to enable the second battery to capture a majority of power generated during regenerative braking, and the bi-stable relay is configured to maintain a coupling of the second battery to the electrical system when a vehicle transitions from a key-on position to a key-off position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An automotive battery system, comprising:
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a first battery configured to be coupled to an electrical system, wherein the first battery comprises a first battery chemistry; a second battery coupled in parallel with the first battery and configured to be selectively coupled to the electrical system via a bi-stable relay, wherein the second battery comprises a second battery chemistry that has a higher coulombic efficiency than the first battery chemistry, and the bi-stable relay is configured to couple the second battery to the electrical system during regenerative braking to enable the second battery to capture a majority of power generated during regenerative braking, and the bi-stable relay is configured to maintain the second battery decoupled from the electrical system while starting an engine when a first voltage of the first battery is greater than a second voltage of the second battery. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A 12 volt automotive battery system, comprising:
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a first battery configured to be selectively coupled to an electrical system via a bi-stable relay, wherein the first battery comprises a first battery chemistry; and a second battery coupled in parallel with the first battery and configured to be coupled to the electrical system, wherein the second battery comprises a second battery chemistry that has a higher coulombic efficiency than the first battery chemistry; wherein the bi-stable relay is configured to disconnect the first battery during regenerative braking to enable the second battery to be charged at a voltage higher than a maximum charging voltage of the first battery. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification