Abstract: A battery pack includes a battery body, a housing, and a heat sink. The housing surrounds a part of the surface of the battery body. The heat sink is disposed on the housing. A bottom surface of the heat sink abuts against a bus board disposed on the upper end of the battery body, and the heat sink is in thermal contact with a module electrode at the upper end of the battery body. In the battery pack provided by the present application, heat dissipation around the battery body could be achieved, heat generated by a tab or heat conducted by the battery body to the tab could also be guided outwards, so that all-round heat dissipation around the battery pack is achieved. The battery pack provided by the present application is suitable for the unmanned aerial vehicle and meets the high heat dissipation requirement.

Abstract: The present application provides a battery including a lower case, a battery cell, a conductive member, an upper cover and a conductor terminal; the lower case is provided with an accommodating cavity with an opening, the battery cell is disposed within the accommodating cavity, the conductive member is electrically connected with the battery cell, the upper cover is covered on the lower case and seals the opening, the upper cover is provided with a through hole, and the conductive member passes through the through hole and extends out of the accommodating cavity; the conductor terminal is detachably disposed on the conductive member; the conductor terminal includes a connection portion and an extension portion, which are located at two ends of the conductor terminal, respectively, the connection portion is inserted into the through hole, and the extension portion extends in a direction away from the upper cover.

Abstract: The present application provides a battery cell assembly and a battery pack. The battery cell assembly includes a bracket and several battery cell modules which are electrically connected with one another, where the bracket is arranged between two adjacent battery cell modules, the battery cell module comprises a plurality of single battery cells which is arranged side by side, and the plurality of single battery cells is electrically connected with one another. The present application provides a battery cell assembly and a battery pack, which can replace a lead-acid battery and meet the use requirements of supplying power to an automobile start-stop system.

Abstract: A drive circuit with a zero-crossing detection function, and a zero-crossing detection method. The drive circuit comprises: a power switch transistor, a pull-up drive transistor, a first pull-down drive transistor and a second pull-down drive transistor. When an inductor starts to discharge, the first pull-down current and the second pull-down current jointly pull down a gate terminal of the power switch transistor, such that the power switch transistor is in a cut-off state; after a set time, the first pull-down current is turned off; and when the inductor ends discharging, a parasitic capacitance of the power switch transistor couples with the drop signal, and when the drop signal is detected, the pull-up current pulls up the gate terminal of the power switch transistor, such that the power switch transistor is in a turn-on state.

Abstract: A drive circuit with a zero-crossing detection function, and a zero-crossing detection method. The drive circuit comprises: a power switch transistor, a pull-up drive transistor, a first pull-down drive transistor and a second pull-down drive transistor. When an inductor starts to discharge, the first pull-down current and the second pull-down current jointly pull down a gate terminal of the power switch transistor, such that the power switch transistor is in a cut-off state; after a set time, the first pull-down current is turned off; and when the inductor ends discharging, a parasitic capacitance of the power switch transistor couples with the drop signal, and when the drop signal is detected, the pull-up current pulls up the gate terminal of the power switch transistor, such that the power switch transistor is in a turn-on state.