Abstract: A charging apparatus and a charging control method, so that only a small quantity of relays are required when an output voltage range and an output power of a power converter are increased. This effectively reduces circuit costs of the charging apparatus, and effectively simplifies a control procedure for serial connection or parallel connection between a plurality of outputs of the power converter. The apparatus includes a first power converter, a first relay, and a second relay. The first power converter includes a first output end and a second output end. Conduction states of the first relay and the second relay are controlled, to control serial connection or parallel connection between the plurality of output ends of the first power converter.

Abstract: The disclosure discloses a preparation method and application of a non-noble metal single atom catalyst, and belongs to the technical fields of chemistry, chemical engineering and material science. According to the disclosure, cheap raw materials and simple method are used to prepare the single atom catalyst. In essence, metal is anchored on light-absorbing carrier in a single atom form under irradiation to produce the single atom catalyst. In the disclosure, the non-noble metal single atom catalyst is prepared by using a photochemical synthetic route for the first time. The single atom catalyst synthesized in the disclosure is dispersed on the surface of photoactive substance. Using nickel single atom as a co-catalyst in photocatalytic water splitting to produce hydrogen, the cost is low and the catalytic efficiency is greatly improved compared with other types of non-noble metal modified composite photocatalysts.

Abstract: An LLC resonant conversion circuit includes a plurality of harmonic circuits. In each harmonic circuit, a plurality of transformers are electrically connected to each other and are electrically connected to one transformer in another harmonic circuit, so that the harmonic circuits are connected in a crossed manner. In this way, current or voltage of an electrical signal in one harmonic circuit can be distributed to another harmonic circuit. Without adding any component, this achieves the same current value for electrical signals in the harmonic circuits when the harmonic circuits are connected in parallel, and achieves the same voltage value for electrical signals in the harmonic circuits when the harmonic circuits are connected in series. This effectively reduces complexity of a control policy for the entire LLC resonant conversion circuit and also reduces costs of the LLC resonant conversion circuit.

Abstract: The power distribution system includes a plug-in frame, a board located in the plug-in frame, and at least one circuit breaker. The board includes a plurality of slot positions, a position signal acquisition apparatus is disposed on the board, and the position signal acquisition apparatus is configured to acquire an address of any slot position on the board. A first end of each circuit breaker extends into the plug-in frame and is plugged to a slot position on the board, and a second end of the circuit breaker is located at an open end of the plug-in frame. The open end of the plug-in frame is provided with an address code, the address code corresponds to an address of a slot position on the board, and each circuit breaker corresponds to at least one address code.

Abstract: The power distribution system includes a plug-in frame, a board located in the plug-in frame, and at least one circuit breaker. The board includes a plurality of slot positions, a position signal acquisition apparatus is disposed on the board, and the position signal acquisition apparatus is configured to acquire an address of any slot position on the board. A first end of each circuit breaker extends into the plug-in frame and is plugged to a slot position on the board, and a second end of the circuit breaker is located at an open end of the plug-in frame. The open end of the plug-in frame is provided with an address code, the address code corresponds to an address of a slot position on the board, and each circuit breaker corresponds to at least one address code.

Abstract: A search request transmitted by a first mobile terminal may be received. The search request may carry location information of the first mobile terminal, when the first mobile terminal transmits the search request. A corresponding grid number may be obtained, based on the location information. The grid number is configured to identify a preset longitude and latitude range of the earth sphere. Information searching for may be obtained based on the grid number. Information searched out may be transmitted to the first mobile terminal.

Abstract: A search request transmitted by a first mobile terminal may be received. The search request may carry location information of the first mobile terminal, when the first mobile terminal transmits the search request. A corresponding grid number may be obtained, based on the location information. The grid number is configured to identify a preset longitude and latitude range of the earth sphere. Information searching for may be obtained based on the grid number. Information searched out may be transmitted to the first mobile terminal.