Abstract: A power tool includes a power tool body. The power tool body is configured to be adapted to at least a first battery pack having a first nominal voltage and a first output terminal set and a second battery pack having a second nominal voltage and a second output terminal set, where the first nominal voltage is different from the second nominal voltage. The power tool body includes a first input terminal set configured to be selectively electrically connected to one of the first output terminal set and the second output terminal set to supply power to the power tool body.

Abstract: A power tool includes a power tool body. The power tool body is configured to be adapted to at least a first battery pack having a first nominal voltage and a first output terminal set and a second battery pack having a second nominal voltage and a second output terminal set, where the first nominal voltage is different from the second nominal voltage. The power tool body includes a first input terminal set configured to be selectively electrically connected to one of the first output terminal set and the second output terminal set to supply power to the power tool body.

Abstract: A portable lighting device includes a lighting assembly, a switch assembly, a control module, a power supply, a power recognition circuit, and a power conversion circuit. The control module is configured to control the lighting assembly to light up according to an indication of the switch assembly. The power supply is used for supplying power to the lighting assembly and includes a battery pack and an external power supply. The power conversion circuit is used for converting a power of the power supply into a power output adapted to the lighting assembly and the control module. The power recognition circuit is configured to selectively output the power of the battery pack or the power of the external power supply to the power conversion circuit.

Abstract: A portable lighting device includes a lighting assembly, a switch assembly, a control module, a power supply, a power recognition circuit, and a power conversion circuit. The control module is configured to control the lighting assembly to light up according to an indication of the switch assembly. The power supply is used for supplying power to the lighting assembly and includes a battery pack and an external power supply. The power conversion circuit is used for converting a power of the power supply into a power output adapted to the lighting assembly and the control module. The power recognition circuit is configured to selectively output the power of the battery pack or the power of the external power supply to the power conversion circuit.

Abstract: A boost power conversion circuit includes an inductor, a first switch module, a second switch module, a first unilateral conduction component, a second unilateral conduction component, a flying capacitor, an upper bus capacitor, a lower bus capacitor, and a third unilateral conduction component. The power supply, the inductor, the first switch module, and the second switch module are connected in series to form a loop. The first unilateral conduction component, the second unilateral conduction component, the upper bus capacitor and the lower bus capacitor are connected in series. The flying capacitor is electrically connected between a reverse cut-off end of the first unilateral conduction component and a forward conduction end of the second unilateral conduction component. The third unilateral conduction component is configured to clamp a voltage stress of the second switch module to a lower-bus voltage.

Abstract: A boost power conversion circuit includes an inductor, a first switch module, a second switch module, a first unilateral conduction component, a second unilateral conduction component, a flying capacitor, an upper bus capacitor, a lower bus capacitor, and a third unilateral conduction component. The power supply, the inductor, the first switch module, and the second switch module are connected in series to form a loop. The first unilateral conduction component, the second unilateral conduction component, the upper bus capacitor and the lower bus capacitor are connected in series. The flying capacitor is electrically connected between a reverse cut-off end of the first unilateral conduction component and a forward conduction end of the second unilateral conduction component. The third unilateral conduction component is configured to clamp a voltage stress of the second switch module to a lower-bus voltage.

Abstract: A curved surface forming device for an adjustable segmented mold board with square rams, consisting of an upper group and a lower group of adjustable molds (4) whose height can be adjusted, and a loading mechanism. The adjustable molds (4) are arranged in the loading mechanism and at least one group of adjustable molds (4) can move up and down under the drive of the loading mechanism. The upper group and the lower group of the adjustable molds (4) are respectively provided with M×N and (M?1)×(N?1) square rams (1) capable of swinging. The upper and the lower square rams (1) are arranged in an interlaced manner in both transverse and longitudinal directions. The square rams (1) are composed of a square plate (a) and the sphere (b) with the pressure imposition surface being a plane or a curved surface. The curved surface forming device can eliminate the crumpling and deformation generated in the board punching, reduce dents and improve processing quality.

Abstract: A curved surface forming device for an adjustable segmented mold board with square rams, consisting of an upper group and a lower group of adjustable molds (4) whose height can be adjusted, and a loading mechanism. The adjustable molds (4) are arranged in the loading mechanism and at least one group of adjustable molds (4) can move up and down under the drive of the loading mechanism. The upper group and the lower group of the adjustable molds (4) are respectively provided with M×N and (M?1)×(N?1) square rams (1) capable of swinging. The upper and the lower square rams (1) are arranged in an interlaced manner in both transverse and longitudinal directions. The square rams (1) are composed of a square plate (a) and the sphere (b) with the pressure imposition surface being a plane or a curved surface. The curved surface forming device can eliminate the crumpling and deformation generated in the board punching, reduce dents and improve processing quality.