Vehicle and method for charging vehicle batteries
First Claim
Patent Images
1. An automotive vehicle comprising:
- a traction battery;
an auxiliary battery having an energy storage capacity less than the traction battery; and
at least one controller configured to, in response to available energy for auxiliary battery charging during non-maximum traction battery charge periods being less than an amount of energy needed to charge the auxiliary battery to a target voltage, cause a specified charge current to be provided to the auxiliary battery during the non-maximum charge periods such that traction battery charging is completed before auxiliary battery charging is completed.
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Abstract
An automotive vehicle includes a traction battery, an auxiliary battery and at least one controller. The at least one controller may be configured to cause a specified charge current to be provided to the traction battery and to cause another specified charge current to be provided to the auxiliary battery if the current being provided to the traction battery is increasing or decreasing.
18 Citations
11 Claims
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1. An automotive vehicle comprising:
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a traction battery; an auxiliary battery having an energy storage capacity less than the traction battery; and at least one controller configured to, in response to available energy for auxiliary battery charging during non-maximum traction battery charge periods being less than an amount of energy needed to charge the auxiliary battery to a target voltage, cause a specified charge current to be provided to the auxiliary battery during the non-maximum charge periods such that traction battery charging is completed before auxiliary battery charging is completed. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
in response to available energy for +12V battery charging being less than an amount of energy needed to charge a +12V battery to a target voltage, providing current to the +12V battery, during non-maximum charge periods, having a magnitude equal to a difference between a current limit and magnitude of charge current provided to a traction battery during the non-maximum charge periods to complete traction battery charging before +12V battery charging. - View Dependent Claims (6, 7, 8)
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9. A power system for a vehicle comprising:
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a traction battery; an auxiliary battery having an energy storage capacity less than the traction battery; and a battery charger having a current limit and configured to, in response to available energy for auxiliary battery charging during non-maximum traction battery charge periods being less than an amount of energy needed to charge the auxiliary battery to a target voltage, provide a specified charge current to the auxiliary battery having a magnitude equal to a difference between the current limit and a magnitude of current provided to the traction battery during the non-maximum charge periods such that traction battery charging is completed before auxiliary battery charging is completed. - View Dependent Claims (10, 11)
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Specification