Method for revitalizing and increasing lithium ion battery capacity
First Claim
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1. A method for operating a lithium-ion battery comprising:
- in response to a loss of battery charge capacity greater than a predetermined loss, discharging, by a controller, the battery to a predetermined voltage less than a voltage associated with zero state of charge such that relative degrees of lithiation associated with positive and negative electrodes of the battery change for at least one state of charge resulting in an increase in the battery charge capacity.
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Abstract
A hybrid or electric vehicle includes a lithium-ion battery and a controller. The controller is programmed to discharge the battery through an electrical load to a predetermined voltage less than a voltage associated with zero state of charge such that relative degrees of lithiation associated with the electrodes of the battery change for at least one state of charge resulting in an increase in battery maximum capacity. The controller may be on-board or off-board of the vehicle. The electrical load may be part of the vehicle or external to the vehicle.
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Citations
20 Claims
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1. A method for operating a lithium-ion battery comprising:
in response to a loss of battery charge capacity greater than a predetermined loss, discharging, by a controller, the battery to a predetermined voltage less than a voltage associated with zero state of charge such that relative degrees of lithiation associated with positive and negative electrodes of the battery change for at least one state of charge resulting in an increase in the battery charge capacity. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle comprising:
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a battery including a plurality of lithium-ion cells with associated positive and negative electrodes; and at least one controller programmed to discharge the battery through an electrical load to a predetermined voltage less than a voltage associated with zero state of charge such that relative degrees of lithiation associated with the electrodes of the battery change for at least one state of charge resulting in an increase in battery maximum capacity. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. An apparatus for operating a lithium-ion battery comprising:
at least one controller programmed to connect an electrical load to the battery and discharge the battery to a predetermined voltage less than a voltage associated with zero state of charge such that relative degrees of lithiation associated with positive and negative electrodes of the battery change for at least one state of charge resulting in an increase in battery maximum capacity. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
Specification