Circuit and system and method for controlling battery
First Claim
1. A battery control circuit for balancing a battery, comprising:
- a controller, generating a control signal according to a voltage difference of the battery;
a balancing device; and
a switch, coupled between the battery and the balancing device, being opened or closed according to the control signal,wherein if the voltage difference is greater than a threshold value, the switch is closed and the balancing device draws a load current from the battery, and if the voltage difference is smaller than or equal to the threshold value, the switch is opened and the balancing device is not capable of drawing any current;
wherein the controller comprises;
a Zener diode, having a cathode and an anode coupled to a ground voltage; and
an OR gate, having two input ends coupled to the cathode of the Zener diode and an output end coupled to the switch, wherein the output end is configured to output the control signal.
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Accused Products
Abstract
A battery control circuit for balancing a battery includes a voltage detector, a controller, a balancing device, and a switch. The voltage detector is configured to detect a voltage difference of the battery so as to generate a detecting signal. The controller is configured to generate a control signal according to the detecting signal. The switch is coupled between the battery and the balancing device, and is opened or closed according to the control signal, wherein if the voltage difference is greater than a threshold value, the switch is closed and the balancing device draws a load current from the battery, and if the voltage difference is smaller than or equal to the threshold value, the switch is opened and the balancing device is not capable of drawing any current.
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Citations
15 Claims
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1. A battery control circuit for balancing a battery, comprising:
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a controller, generating a control signal according to a voltage difference of the battery; a balancing device; and a switch, coupled between the battery and the balancing device, being opened or closed according to the control signal, wherein if the voltage difference is greater than a threshold value, the switch is closed and the balancing device draws a load current from the battery, and if the voltage difference is smaller than or equal to the threshold value, the switch is opened and the balancing device is not capable of drawing any current; wherein the controller comprises; a Zener diode, having a cathode and an anode coupled to a ground voltage; and an OR gate, having two input ends coupled to the cathode of the Zener diode and an output end coupled to the switch, wherein the output end is configured to output the control signal. - View Dependent Claims (2, 3, 4, 5)
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6. A battery control system, comprising:
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a battery, having a voltage difference; a controller, generating a control signal according to the voltage difference of the battery; a balancing device; and a switch, coupled between the battery and the balancing device, being opened or closed according to the control signal, wherein if the voltage difference is greater than a threshold value, the switch is closed and the balancing device draws a load current from the battery, and if the voltage difference is smaller than or equal to the threshold value, the switch is opened and the balancing device is not capable of drawing any current; wherein the controller comprises; a Zener diode, having a cathode and an anode coupled to a ground voltage; and an OR gate, having two input ends coupled to the cathode of the Zener diode and an output end coupled to the switch, wherein the output end is configured to output the control signal. - View Dependent Claims (7, 8, 9, 10)
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11. A battery control method for balancing a battery, comprising the steps of:
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generating a control signal according to a voltage difference of the battery; drawing a load current from the battery by a balancing device if the voltage difference is greater than a threshold value; and not drawing current from the battery by the balancing device if the voltage difference is smaller than or equal to the threshold value; wherein the steps of drawing or not drawing a load current from the battery by a balancing device is performed by a switch and the balancing device, the control signal is generated by a controller, and wherein the controller comprises; a Zener diode, having a cathode and an anode coupled to a ground voltage; and an OR gate, having two input ends coupled to the cathode of the Zener diode and an output end coupled to the switch, wherein the output end is configured to output the control signal. - View Dependent Claims (12, 13, 14, 15)
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Specification