Temperature sensor interface for wireless and wired charging
First Claim
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1. A device for charging a battery unit, comprising:
- a wireless power receiver configured to provide power to charge the battery unit in a wireless charging mode;
a wired charging module configured to provide power to charge the battery unit in a wired charging mode; and
an interface configured to couple to the battery unit and to selectively enable the wireless power receiver to determine a temperature of the battery unit during the wireless charging mode and to selectively enable the wired charging module to provide a bias voltage for determining the temperature of the battery unit during the wired charging mode.
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Abstract
Exemplary embodiments are directed to an electronic device for enabling a temperature of a battery unit to be sensed with a wired power charger or a wireless power. A device may include a wireless power receiver and a wired charging module operably coupled to the wireless power receiver. The device may also include an interface configured to couple to a battery unit and for selectively enabling one of the wireless power receiver and the wired charging module to determine a temperature of the battery unit.
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Citations
25 Claims
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1. A device for charging a battery unit, comprising:
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a wireless power receiver configured to provide power to charge the battery unit in a wireless charging mode; a wired charging module configured to provide power to charge the battery unit in a wired charging mode; and an interface configured to couple to the battery unit and to selectively enable the wireless power receiver to determine a temperature of the battery unit during the wireless charging mode and to selectively enable the wired charging module to provide a bias voltage for determining the temperature of the battery unit during the wired charging mode. - View Dependent Claims (4, 5, 6, 9, 10, 11, 12)
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2. A device for charging a battery unit, comprising:
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a wireless power receiver; a wired charging module operably coupled to the wireless power receiver; and an interface configured to couple to the battery unit and to selectively enable one of the wireless power receiver and the wired charging module to determine a temperature of the battery unit, the interface configured to enable the wired charging module to bias a sensor of the battery unit and determine the temperature of the battery unit if a bias voltage from the wired charging module is greater than or equal to a bias voltage generated by the wireless power receiver. - View Dependent Claims (3)
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7. A device for charging a battery unit, comprising:
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a wireless power receiver; a wired charging module operably coupled to the wireless power receiver; an interface configured to couple to the battery unit and to selectively enable one of the wireless power receiver and the wired charging module to determine a temperature of the battery unit; and a module configured to receive a voltage output from a sensor of the battery unit and comprising an analog-to-digital converter coupled to a microcontroller or a digital comparator circuit to compare the voltage to one or more threshold levels to determine whether a temperature of the battery unit is within an acceptable range, the module further comprising a first switch for coupling a thermistor bias voltage to the analog-to-digital converter and a second switch for coupling a reference voltage to the analog-to-digital converter.
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8. A device for charging a battery unit, comprising:
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a wireless power receiver; a wired charging module operably coupled to the wireless power receiver; and an interface configured to couple to the battery unit and to selectively enable one of the wireless power receiver and the wired charging module to determine a temperature of the battery unit, the wireless power receiver comprising a first plurality of switches to configure a plurality of connections between the wired charging module, wireless power receiver, the interface, and the battery unit and a second plurality of switches to couple an analog-to-digital converter within the wireless power receiver to one of a reference voltage and a thermistor bias voltage.
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13. A method for charging a battery unit, comprising:
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coupling a wireless power receiver to the battery unit via an interface, the wireless power receiver configured to provide power to charge the battery unit in a wireless charging mode; coupling a wired charging module to the battery unit via the interface, the wired charging module configured to provide power to charge the battery unit in a wired charging mode; and selectively enabling the wireless power receiver to determine a temperature of the battery unit via the interface during the wireless charging mode and selectively enabling the wired charging module to provide a bias voltage for determining the temperature of the battery unit via the interface during the wired charging mode. - View Dependent Claims (14, 15, 17, 18, 19, 20, 21)
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16. A method for charging a battery unit, comprising:
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coupling a wireless power receiver to the battery unit via an interface; coupling a wired charging module to the battery unit via the interface; selectively enabling one of the wireless power receiver and the wired charging module to determine a temperature of the battery unit via the interface; comparing a bias voltage generated by the wired charging module to another bias voltage generated by the wireless power receiver; selecting the wired charging module to bias a sensor and sense the temperature of a battery unit prior to conveying power thereto if the bias voltage is greater than or equal to the another bias voltage; and selecting the wireless power receiver to sense the temperature of the battery unit prior to conveying power thereto if the bias voltage is less than the another bias voltage.
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22. A device for charging a battery unit, comprising:
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means for coupling a wireless power receiver to the battery unit via an interface, the wireless power receiver configured to provide power to charge the battery unit in a wireless charging mode; means for coupling a wired charging module to the battery unit via the interface, the wired charging module configured to provide power to charge the battery unit in a wired charging mode; means for selectively enabling the wireless power receiver to determine a temperature of the battery unit via the interface during the wireless charging mode; and means for selectively enabling the wired charging module to provide a bias voltage for determining the temperature of the battery unit via the interface during the wired charging mode. - View Dependent Claims (23, 24, 25)
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Specification