EARLY ALERT OF BATTERY THERMAL STATE BASED ON VOLTAGE
First Claim
1. A vehicle comprising:
- a traction battery; and
at least one controller programmed to, monitor a voltage of the traction battery during charging and, in response to the voltage decreasing at a rate greater than a predetermined rate signaling that the voltage is decreasing toward a local minimum that precedes an increase in the voltage indicative of a traction battery temperature increase rate becoming greater than a threshold, output a diagnostic signal.
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Accused Products
Abstract
A battery management controller includes input channels to receive a voltage signal from a battery and output channels to provide diagnostic signals to an operator. The controller is programmed to output a diagnostic signal predictive of a thermal condition in response to the voltage decreasing at a rate greater than a predetermined rate that signals that the voltage is decreasing toward a local minimum that precedes an increase in the voltage indicative of a battery temperature increase rate becoming greater than a threshold. The diagnostic signal may be used to alert the operator of the condition. The controller may be further programmed to issue commands to mitigate the thermal condition based on the diagnostic signal.
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Citations
20 Claims
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1. A vehicle comprising:
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a traction battery; and at least one controller programmed to, monitor a voltage of the traction battery during charging and, in response to the voltage decreasing at a rate greater than a predetermined rate signaling that the voltage is decreasing toward a local minimum that precedes an increase in the voltage indicative of a traction battery temperature increase rate becoming greater than a threshold, output a diagnostic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery controller comprising:
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input channels configured to receive a voltage signal from a battery; output channels configured to provide diagnostic signals; and control logic configured to, in response to the voltage signal decreasing during charging at a rate greater than a predetermined rate signaling that voltage is decreasing toward a local minimum that precedes an increase in voltage indicative of a battery temperature increase rate becoming greater than a threshold, generate a diagnostic signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of monitoring a battery comprising:
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monitoring, by at least one controller, a voltage of the battery during charging; and outputting, by the at least one controller, a diagnostic signal in response to the voltage decreasing at a rate greater than a predetermined rate signaling that the voltage is decreasing toward a local minimum that precedes an increase in the voltage indicative of a battery temperature increase rate becoming greater than a threshold. - View Dependent Claims (18, 19, 20)
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Specification