CHARGE CONTROL CIRCUIT
First Claim
1. A charge control circuit for battery charging, comprising:
- a resistance module, wherein the resistance module comprises a power supply, a first resistance, and a thermistor, the resistance of the thermistor varies with a temperature of a battery being charged, the power supply provides an external voltage to the charge control circuit;
a voltage comparing module connected to the resistance module, wherein the voltage comparing module compares the voltage of the thermistor with an upper limit voltage and a lower limit voltage to determine whether the temperature of the battery is in a charge temperature range, and wherein the upper limit voltage corresponds to one of a lower limit charge temperature or a upper limit charge temperature of the battery, and the lower limit voltage corresponds to another one of the lower limit charge temperature or the upper limit charge temperature of the battery;
if the voltage comparing module determines the voltage of the thermistor is out of the range between the upper limit voltage and the lower limit voltage, that is to say, the temperature of the battery is out of the temperature range, the comparing module outputs a control signal; and
a charge control module, wherein the charge control module stops charging the battery according to the control signal.
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Accused Products
Abstract
A charge control circuit includes a resistance module, a voltage comparing module, and a charge control module. The resistance module includes a thermistor, and the resistance of the thermistor varies according to the temperature of a battery. The voltage comparing module is connected to the resistance module. The voltage comparing module compares the voltage of the thermistor with upper and lower voltage limits to determine whether the temperature of the battery is in the charge temperature range. If the voltage comparing module determines the voltage of the thermistor is outside the allowed range, the comparing module outputs a control signal to control the charge control module to stop charging the battery.
14 Citations
10 Claims
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1. A charge control circuit for battery charging, comprising:
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a resistance module, wherein the resistance module comprises a power supply, a first resistance, and a thermistor, the resistance of the thermistor varies with a temperature of a battery being charged, the power supply provides an external voltage to the charge control circuit; a voltage comparing module connected to the resistance module, wherein the voltage comparing module compares the voltage of the thermistor with an upper limit voltage and a lower limit voltage to determine whether the temperature of the battery is in a charge temperature range, and wherein the upper limit voltage corresponds to one of a lower limit charge temperature or a upper limit charge temperature of the battery, and the lower limit voltage corresponds to another one of the lower limit charge temperature or the upper limit charge temperature of the battery;
if the voltage comparing module determines the voltage of the thermistor is out of the range between the upper limit voltage and the lower limit voltage, that is to say, the temperature of the battery is out of the temperature range, the comparing module outputs a control signal; anda charge control module, wherein the charge control module stops charging the battery according to the control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification