ELECTRONIC DEVICE AND METHOD FOR CONTROLLING CHARGING CURRENT
First Claim
1. An electronic device comprising:
- a battery terminal for coupling the electronic device to a battery;
a battery temperature terminal for providing a battery temperature signal indicative of a temperature of the battery;
a switch selectively providing bi-directional coupling of a charging input to the battery terminal, a power supply feed line coupling the charging input to at least one module of the electronic device;
a diode providing continuous one way coupling from the battery terminal to the power supply feed line;
a battery charging detector having a charging detect output; and
a controller having a control output coupled to a control switch input of the switch and inputs coupled to both the battery temperature terminal and the charging detect output, wherein in use the controller open circuits the switch in response to both receiving a charging signal from the charging detect output indicating that the battery is being charged and receiving the battery temperature signal indicating that the battery temperature has exceeded a predetermined charge prevention threshold value.
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Accused Products
Abstract
The present invention provides an electronic device comprising a battery terminal (240) for coupling the electronic device (100) to a battery (280), a battery temperature terminal (242) for providing a battery temperature signal indicative of a temperature of the battery, a switch (210) selectively providing bi-directional coupling of a charging input (275) to the battery terminal (240), a power supply feed line ((B+)) coupling the charging input to at least one module (103, 102) of the electronic device (100), a diode (212, 220) providing continuous one way coupling from the battery terminal (240) to the power supply feed line ((B+)), a battery charging detector (235) having charging detect output (237), and a controller (230) having a control output (233) coupled to a control switch input (216) of the switch (210) and inputs coupled to both the battery temperature terminal (242) and the charging detect output (237), wherein in use the controller (230) open circuits the switch (210) in response to both receiving a charging signal from the battery charging detector indicating that the battery is being charged and receiving the battery temperature signal indicating that the battery temperature has exceeded a first predetermined threshold value.
58 Citations
16 Claims
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1. An electronic device comprising:
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a battery terminal for coupling the electronic device to a battery; a battery temperature terminal for providing a battery temperature signal indicative of a temperature of the battery; a switch selectively providing bi-directional coupling of a charging input to the battery terminal, a power supply feed line coupling the charging input to at least one module of the electronic device; a diode providing continuous one way coupling from the battery terminal to the power supply feed line; a battery charging detector having a charging detect output; and a controller having a control output coupled to a control switch input of the switch and inputs coupled to both the battery temperature terminal and the charging detect output, wherein in use the controller open circuits the switch in response to both receiving a charging signal from the charging detect output indicating that the battery is being charged and receiving the battery temperature signal indicating that the battery temperature has exceeded a predetermined charge prevention threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a charging current to a battery in an electronics device having a switch selectively providing bi-directional coupling of a charging input to a battery terminal, the device also having a diode providing continuous one way coupling from the battery terminal to modules of the device, the method comprising:
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opening the switch to an open circuit state in response to determining that both the temperature of the battery has exceeded a predetermined charge prevention threshold value and detecting a charging current is charging the battery; and providing power from the battery to the modules of the device through the diode when the switch is in the open circuit state. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification