Abstract: A battery cell including a membrane electrode assembly, a cathode bipolar plate and an anode bipolar plate. The anode bipolar plate includes a metal layer and a thermally conductive layer. The metal layer is stacked on a side of the membrane electrode assembly that is located farthest away from the cathode bipolar plate. The metal layer has a bottom surface, a top surface, a first side surface and a second side surface. The bottom surface faces the membrane electrode assembly. The thermally conductive layer includes a first cover layer and two second cover layers. The first cover layer covers the top surface of the metal layer. The two second cover layers protrude from two opposite sides of the first cover layer, respectively. The two second cover layers at least partially cover the first side surface and the second side surface of the metal layer, respectively.

Abstract: A close-end fuel cell and an anode bipolar plate thereof are provided. The anode bipolar plate includes an airtight conductive frame and a conductive porous substrate disposed within the airtight conductive frame. In the airtight conductive frame, an edge of a first side has a fuel inlet, and an edge of a second side has a fuel outlet. The conductive porous substrate has at least one flow channel, where a first end of the flow channel communicates with the fuel inlet, a second end of the flow channel communicates with the fuel outlet. The flow channel is provided with a blocking part near the fuel inlet to divide the flow channel into two areas.

Abstract: A rotation speed control circuit for controlling a rotation speed of a fan includes: a rotation speed detector, for generating a rotation speed voltage according to a rotation speed signal corresponding to the rotation speed; a sample and hold element, coupled to the rotation speed detector, for sampling and storing the rotation speed voltage; an error amplifier, coupled to the sample and hold element, for controlling a voltage of a filter capacitor according to the rotation speed voltage and a reference voltage, to adjust an error voltage; and a pulse width modulation signal generator, coupled to the filter capacitor, for generating a pulse width modulation signal according to the error voltage and a triangle wave.

Abstract: A method for driving a two-phase brushless motor is disclosed. The motor includes a rotator with permanent magnetism and a stator including a first coil and a second coil. The method includes activating the two-phase brushless motor, detecting an output voltage of a disabled coil of the first coil and the second coil to generate a detection result, comparing the detection result and a reference voltage to determine a commutation time point between the first coil and the second coil, generating a commutation signal according to the commutation time point, and driving the two-phase brushless motor according to the commutation time point.

Abstract: A rotation speed control circuit for controlling a rotation speed of a fan includes: a rotation speed detector, for generating a rotation speed voltage according to a rotation speed signal corresponding to the rotation speed; a sample and hold element, coupled to the rotation speed detector, for sampling and storing the rotation speed voltage; an error amplifier, coupled to the sample and hold element, for controlling a voltage of a filter capacitor according to the rotation speed voltage and a reference voltage, to adjust an error voltage; and a pulse width modulation signal generator, coupled to the filter capacitor, for generating a pulse width modulation signal according to the error voltage and a triangle wave.

Abstract: A driving method for a motor includes sensing variation of magnetic pole of a rotator of the motor, to generate a magnetic pole sensing signal, determining dead zone of the motor according to the magnetic pole sensing signal, to generate a determination result, and adjusting voltage outputted to a coil of the rotator according to the determination result.

Abstract: A method for driving a two-phase brushless motor is disclosed. The motor includes a rotator with permanent magnetism and a stator including a first coil and a second coil. The method includes activating the two-phase brushless motor, detecting an output voltage of a disabled coil of the first coil and the second coil to generate a detection result, comparing the detection result and a reference voltage to determine a commutation time point between the first coil and the second coil, generating a commutation signal according to the commutation time point, and driving the two-phase brushless motor according to the commutation time point.

Abstract: A driving method for a motor includes sensing variation of magnetic pole of a rotator of the motor, to generate a magnetic pole sensing signal, determining dead zone of the motor according to the magnetic pole sensing signal, to generate a determination result, and adjusting voltage outputted to a coil of the rotator according to the determination result.