Semi-active partial parallel battery architecture for an automotive vehicle systems and methods
First Claim
1. An automotive battery system, comprising:
- a lead-acid battery electrically coupled to a first bus, wherein the lead-acid battery is configured to supply first electrical power to a starter via the first bus to cold crank an internal combustion engine of a vehicle;
a lithium-ion battery electrically coupled to a second bus, wherein the lithium-ion battery is configured to;
capture and store electrical energy generated by a regenerative braking system when the vehicle brakes; and
supply second electrical power to the second bus using the electrical energy captured from the regenerative braking system; and
a DC/DC converter electrically coupled between the first bus and the second bus, wherein the DC/DC converter is configured to control division of the second electrical power into;
a first portion of the second electrical power supplied to an electrical system via the second bus; and
a second portion of the second electrical power supplied to the first bus-to charge the lead-acid battery.
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Accused Products
Abstract
An automotive battery system that includes a lead-acid battery electrically coupled to a first bus, in which the lead-acid battery supplies electrical power to a starter via the first bus to cold crank an internal combustion engine of a vehicle; a lithium-ion battery electrically coupled to a second bus, in which the lithium-ion battery captures and stores electrical energy generated by a regenerative braking system when the vehicle brakes and supplies electrical power to the second bus using the electrical energy captured from the regenerative braking system such that a first portion of the second electrical power is supplied to an electrical system; and a DC/DC converter electrically coupled between the first bus and the second bus, in which the DC/DC converter controls supply of a second portion of the second electrical power to charge the lead-acid battery.
37 Citations
23 Claims
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1. An automotive battery system, comprising:
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a lead-acid battery electrically coupled to a first bus, wherein the lead-acid battery is configured to supply first electrical power to a starter via the first bus to cold crank an internal combustion engine of a vehicle; a lithium-ion battery electrically coupled to a second bus, wherein the lithium-ion battery is configured to; capture and store electrical energy generated by a regenerative braking system when the vehicle brakes; and supply second electrical power to the second bus using the electrical energy captured from the regenerative braking system; and a DC/DC converter electrically coupled between the first bus and the second bus, wherein the DC/DC converter is configured to control division of the second electrical power into; a first portion of the second electrical power supplied to an electrical system via the second bus; and a second portion of the second electrical power supplied to the first bus-to charge the lead-acid battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for operating a battery system, comprising:
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cold cranking, using a starter, an internal combustion engine when a vehicle is transitioned from key off to key on, wherein a first battery of the battery system supplies first electrical power to the starter to cold crank the internal combustion engine; converting, using a regenerative braking system, mechanical energy from motion of the vehicle into electrical energy; capturing, using a second battery of the battery system, the electrical energy generated by the regenerative braking system; outputting second electrical power from the second battery using the electrical energy generated by the regenerative braking system; and controlling dividing, using a DC/DC converter, the second electrical power into; a first portion of the second electrical power supplied to an electrical system of the vehicle; and a second portion of the second electrical power used to charge the first battery. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A tangible, non-transitory, computer-readable medium that stores instructions executable by at least one processor in a vehicle, wherein the instructions comprise instructions to:
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instruct, using the at least one processor, a battery system of the vehicle to disconnect a first battery from a starter of the vehicle to enable a second battery to supply first electrical power to the starter by itself to cold crank an internal combustion engine when the vehicle transitions from key off to key on; determine, using the at least one processor, whether a state of charge of the first battery is greater than a first threshold; instruct, using the at least one processor, an alternator of the vehicle to convert first mechanical energy from the internal combustion engine into first electrical energy when the state of charge of the first battery is not greater than the first threshold such that at least a portion of second electrical power output by the alternator is used to charge the first battery above the first threshold; and instruct, using the at least one processor, the battery system to control division of third electrical power output from the first battery between a first portion used to charge the second battery and a second portion used to power an electrical system of the vehicle when the state of charge of the first battery is greater than the first threshold. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification