Methods and systems for detecting battery presence
First Claim
Patent Images
1. A battery presence detection circuit inside a device connectable to a battery, the battery presence detection circuit comprising:
- a terminal battery detection line configured to be connected to the battery when the battery is connected to the device;
a terminal ground line configured to be connected to the battery when the battery is connected to the device;
a terminal capacitance connected between the terminal battery detection line and the terminal ground line;
a pulse generator configured to generate a line charging pulse signal applied to the terminal battery detection line; and
a detector configured to detect a presence of one of a line voltage edge and a line voltage level on the terminal battery detection line, and to output an indication as to whether the battery is connected to the device, based on whether the one of the line voltage edge and the line voltage level is present on the terminal battery detection line in response to the line charging pulse signal.
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Abstract
A device has a battery presence detection system. A line charging pulse signal is applied to a terminal battery detection line, which is connected when the battery is present to a ground line via a resistor and a capacitance. A detector determines whether the battery is connected to the mobile terminal based on detecting whether a line voltage edge or a line voltage level on the terminal battery detection line is present.
14 Citations
20 Claims
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1. A battery presence detection circuit inside a device connectable to a battery, the battery presence detection circuit comprising:
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a terminal battery detection line configured to be connected to the battery when the battery is connected to the device; a terminal ground line configured to be connected to the battery when the battery is connected to the device; a terminal capacitance connected between the terminal battery detection line and the terminal ground line; a pulse generator configured to generate a line charging pulse signal applied to the terminal battery detection line; and a detector configured to detect a presence of one of a line voltage edge and a line voltage level on the terminal battery detection line, and to output an indication as to whether the battery is connected to the device, based on whether the one of the line voltage edge and the line voltage level is present on the terminal battery detection line in response to the line charging pulse signal.
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2. A device, comprising:
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a peripheral presence detection system inside the device, including; a terminal communication line; a terminal ground line; and a detector configured to detect a presence of one of a line voltage edge and a line voltage level on the terminal communication line occurring in response to a line charging pulse signal applied by the device to the terminal communication line, and to output an indication of whether a peripheral is connected to the device based on the detected presence, wherein the terminal communication line and the terminal ground line are connectable to corresponding lines of the peripheral. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for detecting by a device whether a battery is connected to the device, the method comprising:
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applying by the device a line charging pulse signal to a terminal battery detection line detecting whether one of a line voltage edge and a line voltage level of a voltage on the terminal battery detection line occurs on the terminal battery detection line in response to the line charging pulse; and determining whether the battery is connected to the device based on the detecting, wherein the terminal battery detection line is connected to a ground line via a pull down resistor and a capacitance while the battery is connected to the device. - View Dependent Claims (18, 19, 20)
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Specification