CONTROLLING BATTERY CHARGING BASED ON CURRENT, VOLTAGE AND TEMPERATURE
First Claim
1. A method for charging a battery, wherein the battery is a lithium-ion battery, the method comprising:
- monitoring a current through the battery;
monitoring a voltage of the battery;
monitoring a temperature of the battery;
inferring electrode lithium surface concentrations for the battery from the monitored current, voltage and temperature; and
applying the charging current and/or the charging voltage in a manner that maintains the inferred electrode lithium surface concentrations for the battery within set limits.
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Accused Products
Abstract
Some embodiments of the present invention provide a system that charges a lithium-ion battery. During operation, the system monitors: a current through the battery, a voltage of the battery, and a temperature of the battery. Next, the system uses the monitored current, voltage and temperature to control a charging process for the battery. In some embodiments, controlling the charging process involves: inferring electrode lithium surface concentrations for the battery from the monitored current, voltage and temperature; and applying the charging current and/or the charging voltage in a manner that maintains the inferred electrode lithium surface concentrations for the battery within set limits.
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Citations
32 Claims
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1. A method for charging a battery, wherein the battery is a lithium-ion battery, the method comprising:
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monitoring a current through the battery; monitoring a voltage of the battery; monitoring a temperature of the battery; inferring electrode lithium surface concentrations for the battery from the monitored current, voltage and temperature; and applying the charging current and/or the charging voltage in a manner that maintains the inferred electrode lithium surface concentrations for the battery within set limits. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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2. (canceled)
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3. (canceled)
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15. A battery with a charging mechanism, comprising:
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the battery; a voltage sensor configured to monitor a voltage of the battery; a current sensor configured to monitor a current through the battery; a temperature sensor configured to monitor a temperature of the battery; a charging source configured to apply a charging current and/or a charging voltage to the battery; and a controller configured to receive inputs from the voltage sensor, the current sensor and the temperature sensor, and to send a control signal to the charging source; wherein the controller is configured to, infer electrode lithium surface concentrations for the battery from the monitored current, voltage and temperature, and apply the charging current and/or the charging voltage in a manner that maintains the inferred electrode lithium surface concentrations for the battery within set limits. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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16. (canceled)
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17. (canceled)
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26. A charging mechanism for a battery, comprising:
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a voltage sensor configured to monitor a voltage of the battery; a current sensor configured to monitor a current through the battery; a temperature sensor configured to monitor a temperature of the battery; a charging source configured to apply a charging current and/or a charging voltage to the battery; and a controller configured to receive inputs from the voltage sensor, the current sensor and the temperature sensor, and to send a control signal to the charging source; wherein the controller is configured to, infer electrode lithium surface concentrations for the battery from the monitored current, voltage and temperature, and apply the charging current and/or the charging voltage in a manner that maintains the inferred electrode lithium surface concentrations for the battery within set limits. - View Dependent Claims (28, 29, 30, 31, 32)
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27. (canceled)
Specification