Abstract: A method and device for controlling a charging station, and a charging station system. The charging station includes multiple charging positions each comprising a charging pile and a parking space corresponding to the charging pile. The method includes: obtaining in real time first information comprising usage status information and daily usage information of the charging piles and occupancy status information of the parking spaces, the usage status information is information about whether the charging piles being currently in use, and the daily usage information is information about a quantity of charging piles used in a predetermined time period of each day; and determining parking information according to the first information, the parking information comprises a quantity of first available parking spaces used for fuel vehicles and a quantity of second available parking spaces used for electric vehicles.

Abstract: An isolated bidirectional converter and a method for controlling the same are provided. A primary winding or a secondary winding of a transformer module in the isolated bidirectional converter is connected in parallel with a first branch includes a first inductor and a first current sensor that arc connected in series, A current flowing through the first inductor is acquired by the first current sensor, and is proportional to a current flowing through a magnetizing inductor of the winding. Therefore, the current is controlled by modifying a duty cycle of a switch transistor on a bridge arm in the circuit, so that a. direct current component of a current flowing through the winding is modified indirectly, thereby avoiding magnetic bias on the magnetizing to inductor of the transformer module, and preventing the transformer module from being saturated.

Abstract: An isolated power converter and a hydrogen production system are provided. An electrical connection structure in the isolated power converter includes N secondary winding output bus bars, N rectifier circuit input bus bars, and a positive-negative bus bar, where N is greater than or equal to 1. A secondary winding may include M tapping points, and the secondary winding output bus bar and the rectifier circuit input bus bar that correspond to the secondary winding each include M copper bars that are insulated and stacked. The M tapping points of the secondary winding overlap the M copper bars of the secondary winding output bus bar at input ends of the M copper bars, respectively. The positive-negative bus bar includes two copper bars that are insulated and stacked.

Abstract: A capacitor structure and a power converter are provided. The capacitor structure includes a parallel cell combination, and the parallel cell combination includes a plurality of cells and a plurality of current collectors. In the parallel cell combination: the cells are connected in parallel, and the poles connected in parallel are respectively connected with other devices through corresponding confluence points. Same poles of two adjacent cells are connected through a corresponding current collector, and the current-carrying specifications of each current collector is lower than the current-carrying requirements of a confluence point of a corresponding pole. That is to say, a conductor that implements the parallel connection of the cells is no longer a whole copper plate, but the individual current collectors, thus realizing the reduction of the cost of the conductor material.

Abstract: A capacitor structure and a power convertor are provided by the present disclosure. The capacitor structure includes a housing and at least one core arranged inside the housing, and two electrodes of the capacitor structure are respectively led out from two ends of the housing. Thus, the pole piece required in a case that electrodes are led from the same end of the housing is omitted, thereby saving material cost. Besides, the housing and the core are respectively hollow structures, and the internal heat of the capacitor structure can be ventilated and dissipated through the corresponding hollow part, thereby improving the heat dissipation performance of the capacitor structure. In addition, by arranging the fin heat dissipation teeth on the housing, the heat dissipation area can be increased to further improve the heat dissipation efficiency.

Abstract: A photovoltaic power generation system and a method for controlling power balance are provided. The system includes at least two photovoltaic arrays, at least one power balance circuit and a power converter. Each of input ports of the power balance circuit is connected with at least one photovoltaic array, and an output port of the power balance circuit is connected with the power converter. The power balance circuit performs power transfer based on a difference between output powers of the two photovoltaic arrays to control a difference between powers of two output terminals of the power balance circuit to be within a preset range.

Abstract: An IGBT module, a conductor installing structure for the IGBT module and an inverter are provided. The conductor installing structure for the IGBT module includes a substrate, a conductor and an insulation sleeve sleeved on the conductor and insulatedly isolating the conductor from the substrate. In the conductor installing structure for the IGBT module according to the present disclosure, by using the insulation sleeve sleeved on the conductor to insulatedly isolating the conductor from the substrate, the comparative tracking index of the IGBT module is improved, thereby improving the creepage distance of the IGBT module. In addition, compared with conventional technologies of spraying insulation varnish or insulation paste, the insulating property of the insulation sleeve can be better detected and guaranteed, and the bounding between the insulation sleeve and the substrate can be better enhanced, improving the insulation reliability.

Abstract: A method and a device for acquiring a charging electricity amount, and an electronic device are provided. When a controller determines based on at least operation state information of an external electric meter that the external electric meter is in a fault state, the first amount of electricity, outputted by the charging pile when the external electric meter is in the fault state, can be calculated based on at least first electric energy output data of the charging pile acquired by the charging module of the charging pile when the external electric meter is in the fault state. That is, the amount of electricity consumed by the charging pile can be calculated even when the external electric meter is in the fault state, so that the controller to calculates the cost based on the amount of electricity consumed by the charging pile.

Abstract: A charging pile, and a device, system and method for testing a charging pile are provided. An inner side of a port of one of the gun bases is connected to an inner side of the same port of the other of the gun bases. An outer side of each port of each gun base connected to a port of a charging gun connected to the gun base, so that the two charging guns are connected. In addition, one of the two charging guns operates in the forward output state and serves as tested gun to be tested. The other of the two charging guns operates in the reverse conversion state and serves as a testing gun to test the tested gun. The gun base controller saves and exports the communication data on the communication bus between the two charging guns.

Abstract: A device for producing hydrogen by water electrolysis, which includes a protective shell and an electrolytic bath provided in the protective shell, and a power supply cable and a pipeline are provided on the electrolytic bath, and both the power supply cable and the pipeline are coupled to the outside of the protective shell. In the device for producing hydrogen by water electrolysis provided by the present application, a protective shell is provided outside the electrolytic bath to avoid the exposed design of the electrolytic bath, that is, the device for producing hydrogen by water electrolysis can thus be installed indoors or outdoors, thereby improving the versatility of the device for producing hydrogen by water electrolysis.

Abstract: An inverter circuit control method and a device thereof are provided. In the control method, after determining a DC bus voltage and an output leakage current of a target inverter circuit, a modulation harmonic wave to be injected into a SPWM signal is adjusted according to the DC bus voltage or the output leakage current if it is determined according to the DC bus voltage that the target inverter circuit satisfies a preset modulation condition, such that total harmonic distortion of a current of the target inverter circuit is within a preset range. The DC bus voltage and the output leakage current of the target inverter circuit are used as references for adjusting the modulation harmonic wave, ensuring total harmonic distortion of the current of the target inverter circuit to be within a preset range.

Abstract: A liquid-cooling heat dissipation device and a power module are provided. The liquid-cooling heat dissipation device includes a housing and a flow passage arranged inside the housing. A device mounting position for mounting a heating device is provided in the housing, the device mounting position includes a first mounting position and a second mounting position, the first mounting position is arranged on a first wall surface of the flow passage, and the second mounting position is arranged on a second wall surface of the flow passage.

Abstract: An energy storage system and a control method thereof in the field of energy storage are provided. The system includes: an energy storage battery, a first bidirectional DC/DC circuit, a DC bus, a DC/AC circuit, a first controllable switch, and a second controllable switch. The energy storage battery is connected to a device side of the first bidirectional DC/DC circuit via the first controllable switch; a bus side of the first bidirectional DC/DC circuit is connected to the DC bus; the DC bus is connected to a public power grid via the DC/AC circuit; the second controllable switch has a first end connected to a chargeable vehicle, and a second end connected to the device side of the first bidirectional DC/DC circuit; and at most one of the first controllable switch and the second controllable switch is in a closed state at the same time.

Abstract: A case heat dissipation structure is provided, which includes a case, a heat exchange assembly and a fan assembly. The case has a first heat dissipation chamber and a second heat dissipation chamber that are communicated with each other, and multiple heat sources are mounted in the first heat dissipation chamber and the second heat dissipation chamber, a liquid inlet for cooling liquid to flow in and a liquid outlet for cooling liquid to flow out are provided on the case. The heat exchange assembly is mounted in the first heat dissipation chamber, the heat exchange assembly comprises a heat exchanger, which is arranged between the liquid inlet and the liquid outlet. The fan assembly is mounted in the first heat dissipation chamber or the second heat dissipation chamber, and is used for driving the air in the first heat dissipation chamber and the second heat dissipation chamber to circulate mutually in operation.

Abstract: A flying capacitor-type NPC three-level topology, comprising: two half-busbar capacitors and at least one bridge arm. The bridge arm comprises: a flying capacitor, two inner transistor units, two outer transistor units, and two clamping diodes, wherein the capacitance of the flying capacitor is greater than a specific value. Since the flying capacitor has a clamping effect on the two inner transistor units and the capacitance of the flying capacitor is large, voltage fluctuations of the flying capacitor would not cause overvoltage of switching transistors no matter what type of short circuit fault occurs, thereby preventing the switching transistor units from being damaged due to overvoltage and further improving the security of a circuit.

Abstract: A detection device, and a method for inspecting a relay, and a charging pile are provided. The detection device includes a detection module and an isolation output module, The detection module includes a first signal input terminal for connecting to an output side of a relay and a second signal input terminal for connecting to a neutral wire. A signal output terminal of the detection module is configured to connect to a control end of the isolation output module. The detection module is configured to output a control signal based on an on-off state of the relay. A signal output terminal of the isolation output module is configured to connect to a fault identification device. The isolation output module is configured to output a to detection signal with a duty cycle corresponding to the control signal, to inform the fault identification device to detect whether the relay is stuck.

Abstract: A power cabinet, which includes a cabinet body and an electric reactor, a power unit and a switch arranged in the interior of the cabinet body. In the interior of the cabinet body of the power cabinet, the electric reactor is arranged close to a first side in the interior of the cabinet body, and the power unit and the switch are arranged on a second side in the interior of the cabinet body, opposite to the first side. Moreover, these electric reactor, the power unit and the switch are all located in a lower space. In addition, in the power cabinet, the electric reactor and power unit dissipate heat in different chambers from the switch dissipates heat.

Abstract: A three-level Boost circuit is provided. The three-level Boost circuit includes: an input capacitor, an inductor, a first switch, a second switch, a first freewheeling diode, a second freewheeling diode, a flying capacitor, a balance capacitor, a charging diode, a clamp diode, a discharging diode and an output series capacitor bank.

Abstract: The present application discloses a power cabinet, which is designed as a form of cabinet. All devices in the power cabinet are categorized into two types, and the two types of devices can have their own heat-dissipation channels or share a same heat-dissipation channel, which has a compact overall structure and high heat-dissipation efficiency compared with an air duct layout solution in the conventional technology.