Abstract: A charger adapted to charge either one of a first battery pack and a second battery pack. The first battery pack and the second battery pack have respectively a first interface and a second interface being substantially different from each other. The charger includes a housing having a receiving area in which the first battery pack and the second battery pack can be selectively received in such a way that the first battery pack is accommodated in a first region and the second battery pack is accommodated in a second region. The receiving area is at least partially defined by the first region partially overlapping the second region. The charger according to the invention is adapted to charge more than one type of battery pack, which saves cost and space needed for two separate chargers.

Abstract: A battery module contains a casing, a cell frame received within and connected to the casing, a first connector mounted to the cell frame; a second connector mounted to the cell frame; and a plurality of sub-modules installed in the cell frame. Each of the plurality of sub-modules includes a plurality of battery cells. Each of the plurality of sub-modules further contains a positive output terminal and a negative output terminal that are connected to the first connector or the second connector. A plurality of interconnecting features allows the battery module to detachably connect to an adjacent battery module of a same type to form a scalable battery system. Similar battery modules can be stacked to form a battery system with additional capacity, without the need to modify the internal structure or circuit connection of the individual battery module.

Abstract: A vacuum cleaner includes a main body and a vacuum head connected to the main body through an air hose. The main body includes a main motor and a main impeller driven by the main motor. The vacuum head includes an auxiliary motor connected to the auxiliary impeller and configured to drive the auxiliary impeller. Both the main impeller and the auxiliary impeller are in the duct of the vacuum cleaner. The vacuum uses two smaller power motors to combine the vacuuming effect of the high power motor. This not only reduces costs, improves overall efficiency, but also reduces noise.

Abstract: A pouch battery contains a pouch, an electrode material and a safety protection device. The electrode material is located in the pouch. The safety protection device is configured to generate an action based on a change in gas pressure within the pouch. In this way, even if the pouch battery is abnormal, its internal circuit can be cut off in time to avoid providing power to external devices while being under abnormal conditions.

Abstract: A brushless motor includes a stator (26) having six slots (30), and a rotor having two poles. The rotor is adapted to rotate with respect to the stator. By adopting a 6-slots-2-poles structure, the brushless motor effectively reduces operational noise due to iron loss and unbalanced pull. As a result, the working life of the motor can be improved.

Abstract: A blower is provided, which comprises a housing, a blowpipe coupled to the housing, a motor located within the housing, and blades driven by the motor to generate air flow. The blower also comprises a motion sensor. The motion sensor is adapted to control the operation of the motor in response to changes in position or angle of the blower. The motion sensor can determine the angle between the blower and the horizontal plane, thereby intelligently determining whether the user wants to carry the blower by hand and wants to perform air blowing, and controls the operation of the motor accordingly.

Abstract: Electric tool system and method of operating the same. One electric tool system includes a first electric tool and a second electric tool. A method of operating the electric tool system includes providing a first battery for the first electric tool and a second battery for the second electric tool. The method further includes designating the first battery as a master, and designating the second battery as a slave. The method further includes configuring the first electric tool to a first operating mode, detecting a first operating parameter by the master, and transmitting a first signal from the master to the slave based on the first operating parameter detected by the master. The method further includes the slave receiving the first signal from the master and enabling operation of the second electric tool.

Abstract: A battery pack containing a frame; and two or more battery cells installed to the frame. The two or more battery cells are interconnected by a configurable connector which is configured to enable electrical connections between the two or more battery cells. The configurable connector is adapted to be configured in a first status or a second status. In the first status, the two or more battery cells are electrically connected, and in the second status, the two or more battery cells are not electrically connected. The battery pack is not fully operational without the terminal holder inserted, therefore before it is delivered to the end user the energy loss due to self-discharging during storage and shipping can be minimized.

Abstract: A portable power supply assembly for power tool, the power supply operated on AC mains having a mains input comprises an AC-to-DC converter coupled between the mains input and a rechargeable battery unit, a DC-to-DC converter, wherein the rechargeable battery unit couples to an input of the DC-to-DC converter, a power inverter for converting direct current (DC) into alternating current (AC), a housing for enclosing the AC-to-DC converter, the rechargeable battery unit, the DC-to-DC converter and the power inverter, an AC outlet disposed on the housing.

Abstract: A battery pack includes a housing and a plurality of battery units inside the housing. The battery pack further includes a USB Type-C interface disposed on the housing. Since many power supply devices that support the USB Type-C interface exist on the market, it is only convenient to use any such power supply device to charge the battery pack of the power tool in the present invention without considering any mechanical structure of the battery.