Energy recapture for an industrial vehicle
First Claim
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1. An energy recapture system comprising:
- a capacitor;
a battery connected to the capacitor in an electrical circuit; and
a controller configured to;
identify a regenerative energy transfer event of a vehicle;
switch the battery out of the electrical circuit in response to identifying the regenerative energy transfer event;
monitor a state of charge of the capacitor during the regenerative energy transfer event, wherein the state of charge of the capacitor is compared with a capacitor charge limit; and
switch the battery into the electrical circuit during the regenerative energy transfer event in response to the state of charge of the capacitor reaching or exceeding the capacitor charge limit.
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Abstract
A system for capturing regenerative energy includes a battery configured to provide power for a traction motor and other operations of a vehicle and a capacitor connected to the battery. An auxiliary motor is configured to operate as a generator during a regenerative energy operation. The system further includes a controller configured to direct the regenerative energy to the capacitor during the regenerative energy operation and discharge the capacitor to provide power to the traction motor or for the other operations of the vehicle.
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Citations
30 Claims
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1. An energy recapture system comprising:
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a capacitor; a battery connected to the capacitor in an electrical circuit; and a controller configured to; identify a regenerative energy transfer event of a vehicle; switch the battery out of the electrical circuit in response to identifying the regenerative energy transfer event; monitor a state of charge of the capacitor during the regenerative energy transfer event, wherein the state of charge of the capacitor is compared with a capacitor charge limit; and switch the battery into the electrical circuit during the regenerative energy transfer event in response to the state of charge of the capacitor reaching or exceeding the capacitor charge limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21)
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11. A system for capturing regenerative energy comprising:
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a battery configured to provide power for a traction motor and other operations of a vehicle; a capacitor connected to the battery; an auxiliary motor configured to operate as a generator during a regenerative energy operation; and a controller configured to; direct the regenerative energy to the capacitor during the regenerative energy operation; monitor a change in battery voltage; adjust a minimum allowable capacitor discharge threshold value according to the change in battery voltage; monitor a supply voltage; and discharge the capacitor to provide power to the traction motor or for the other operations of the vehicle, wherein the capacitor ceases discharging when the supply voltage drops to, or falls below, the adjusted minimum allowable capacitor discharge threshold value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 30)
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22. A system comprising:
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a capacitor; a battery connected to the capacitor in an electrical circuit; means for identifying a regenerative energy transfer event of a vehicle; means for switching the battery out of the electrical circuit in response to identifying the regenerative energy transfer event; means for monitoring a temperature of the capacitor during the regenerative energy transfer event, wherein the temperature of the capacitor is compared with an allowable charging temperature threshold; and means for switching the battery into the electrical circuit during the regenerative energy transfer event in response to the temperature of the capacitor reaching or exceeding the allowable charging temperature threshold. - View Dependent Claims (23, 24)
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25. A method comprising:
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identifying a regenerative energy transfer event of a vehicle, wherein the vehicle comprises a battery connected to a capacitor in an electrical circuit; switching the battery out of the electrical circuit in response to identifying the regenerative energy transfer event; monitoring a state of charge of the capacitor during the regenerative energy transfer event, wherein the state of charge of the capacitor is compared with a capacitor charge limit; and switching the battery into the electrical circuit during the regenerative energy transfer event in response to the state of charge of the capacitor reaching or exceeding the capacitor charge limit. - View Dependent Claims (26, 27, 28, 29)
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Specification