Abstract: A cooling apparatus, comprising a mainboard and a cooling fan, where the novel cooling apparatus comprises: a heat sink, provided on the mainboard and affixed to one end of a vent of the cooling fan. The heat sink comprises: a groove, used for accommodating a heat-generating component provided on the mainboard; cooling fins, distributed within the heat sink and arranged on two sides of the groove. A venting and cooling channel is constituted between the interior of the heat sink and the vent of the cooling fan. The beneficial effect of the technical solution is such that, with other heat-generating components placed in the heat sink, the space in the heat sink is fully utilized, the fan is utilized to cool the heat sink and the heat-generating components therein, thus increasing the utilization rate of the fan, increasing the cooling efficiency, and effectively utilizing space.

Abstract: The present invention relates to a charging system based on wireless communication comprising: a mobile terminal, configured to transmit a control instruction and receive the query data matching user's selection according to the user's selection; a charging system, configured to receive the control instruction and charge a rechargeable battery pack according to the control instruction; a wireless communication, configured to interact with data between the mobile terminal and the charging system; wherein, the mobile terminal comprises: a query unit, configured to receive the query data inputted by the user and read the query data stored in a memory unit and matching the query according to the query data. User may get a charging curve and/or a remaining charging time according to the acquisition data. After charging completes, the mobile terminal will send a control instruction to stop charging so as to save energy and protect the battery.

Abstract: A charger system for battery starting current test, comprising: a battery equivalent circuit comprising a battery internal resistance R0 and an electromotive force E connected in series, two ends of the battery equivalent circuit are connected to a first signal and a second signal, respectively; a signal drive circuit, comprising a first DC output signal and a second DC output signal, and a first load circuit and a second load circuit configured between the first DC output signal and the second DC output signal, each load circuit is connected to the battery equivalent circuit and controlled by a first drive signal and a second drive signal; an intermediate resistor R28, configured between the signal drive circuit and the battery equivalent circuit. This invention uses the above technical solution to test the internal resistance of the battery, and find out the CCA value of the battery via the internal resistance correspondingly.

Abstract: The present invention relates to an inverter device. Regard to the problem in the traditional convert device that the user is difficult to obtain the information shown on the display panel in time; the state of the inverter can not be switched remotely after the user leaves; discharging or early switching-off caused by missing battery information; and the draught fan can only be at the state of ‘full-speed-start’ or switch-off, the invention provides an inverter device, it is configured with an extensible flexible wire to fix the display panel of the inverter to the place the user wants to for getting the information of the inverter in time; by virtue of wireless transmission, user can control the state of the inverter remotely; by adding a test module to the inverter device, it avoids the waste of electricity which is caused by the discharging of the battery-to-convert and switching off.

Abstract: The present invention relates to a charging system based on wireless communication comprising: a mobile terminal, configured to transmit a control instruction and receive the query data matching user's selection according to the user's selection; a charging system, configured to receive the control instruction and charge a rechargeable battery pack according to the control instruction; a wireless communication, configured to interact with data between the mobile terminal and the charging system; wherein, the mobile terminal comprises: a query unit, configured to receive the query data inputted by the user and read the query data stored in a memory unit and matching the query according to the query data. User may get a charging curve and/or a remaining charging time according to the acquisition data. After charging completes, the mobile terminal will send a control instruction to stop charging so as to save energy and protect the battery.

Abstract: An inverter circuit includes a DC-AC inverter, a sampling circuit, a voltage-current conversion circuit, an isolation circuit and an electronic starter switch. The sampling circuit includes a first and a second diode connected in parallel and opposite in polarity. A forward voltage drop at the first diode blocks the conductance of a first transistor of the voltage-current conversion circuit when there is no load, and a forward voltage drop at the second diode turns on the first transistor when there is a load. The connection of the first and second diodes to a second AC output terminal of the DC-AC inverter nearly has no impact on the AC output of the inverter circuit. These enable the inverter circuit to have low power consumption when there is no load and to be immediately activated upon connection of a load, thereby achieving detection of a load smaller than 0.1 W.

Abstract: The present invention discloses a switch control system and its method for a USB charger, wherein the switch control system controls the on-off status of the charging circuit according to whether a charging load is connected or not. The switch control system comprises a first switch and an on-off control unit of the first switch. The first switch connects to a charging power and a converter; the on-off control unit of the first switch connects to the USB output interface and the first switch to control the on-off status of the first switch according to whether the charging load is connected or not. The switch control system and the method for the USB charger disclosed by the present invention realize automatic switching on and off of the USB operating circuit when a load is connected to or removed from the USB output interface.

Abstract: The present invention discloses a compact converter including a compact casing having an air inlet defined thereon, a printed circuit board supported within the compact casing at a position between a top and a bottom wall of the compact casing to form an upper air channel between the printed circuit board and the top wall of the compact casing and a lower air channel between the printed circuit board and the bottom wall of the compact casing, wherein the lower air channel is communicating with the upper channel; a cooling fan is electrically mounted on the printed circuit board at a position aligning with the air inlet for drawing exterior air through the air inlet to the lower air channel to create an air circulation between the lower air channel and the upper air channel, so as to cool down the printed circuit board.