Methods and Systems for Detecting Battery Presence
First Claim
1. A battery presence detection system of a device, said device being connectable to a battery, a battery detection line of the battery being connected to a battery ground line of the battery via a pull-down resistor, the battery presence detection system comprising:
- a terminal battery detection line configured to be connected to the battery detection line of the battery when the battery is connected to the device;
a terminal ground line configured to be connected to the battery ground line of the battery when the battery is connected to the device;
a terminal capacitance 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 output an indication as to whether the battery is connected to the device based on the presence of the one of the line voltage edge and the line voltage level on the terminal battery detection line.
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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.
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Citations
20 Claims
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1. A battery presence detection system of a device, said device being connectable to a battery, a battery detection line of the battery being connected to a battery ground line of the battery via a pull-down resistor, the battery presence detection system comprising:
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a terminal battery detection line configured to be connected to the battery detection line of the battery when the battery is connected to the device; a terminal ground line configured to be connected to the battery ground line of the battery when the battery is connected to the device; a terminal capacitance 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 output an indication as to whether the battery is connected to the device based on the presence of the one of the line voltage edge and the line voltage level on the terminal battery detection line.
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2. A device including a peripheral presence detection system, comprising:
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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, and to output an indication of whether a peripheral is connected to the device based on the detected presence. - 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 whether a battery is connected to a device, the method comprising:
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applying a line charging pulse signal to a terminal battery detection line connected to a ground line via a pull down resistor and a capacitance while the battery is connected to the device; detecting whether one of a line voltage edge and a line voltage level of a voltage on the terminal battery detection line is present; and determining whether the battery is connected to the device based on the detecting. - View Dependent Claims (18, 19, 20)
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Specification