Abstract: Embodiments of this application disclose a power supply method, a control method, a power source, and a detection apparatus, to improve power supply efficiency of a power supply system. The method in the embodiments of this application includes: converting a voltage input into a power source into a first voltage, and supplying power to an energy-consuming component based on the first voltage; obtaining status information obtained after the energy-consuming component is powered on, where the status information includes identification information of the energy-consuming component or current working status information of the energy-consuming component; determining a second voltage based on the status information; and converting the voltage input into the power source into the second voltage, and supplying power to the energy-consuming component based on the second voltage.

Abstract: An energy efficiency control method and apparatus are provided. The method, implemented by a communications device comprising a primary power supply, a secondary power supply, and a control apparatus, includes: obtaining a current load rate of the primary power supply and a load power of the secondary power supply; determining, based on the obtained current load rate and the load power, a target output voltage of the primary power supply and a target input voltage of the secondary power supply that satisfy an energy efficiency requirement of the communications device, wherein energy efficiency of the communications device is related to the energy efficiency of the primary power supply and the energy efficiency of the secondary power supply; and controlling the primary power supply to output the target output voltage, and controlling an input voltage of the secondary power supply to be the target input voltage.

Abstract: Embodiments of this application disclose a power supply method, a control method, a power source, and a detection apparatus, to improve power supply efficiency of a power supply system. The method in the embodiments of this application includes: converting a voltage input into a power source into a first voltage, and supplying power to an energy-consuming component based on the first voltage; obtaining status information obtained after the energy-consuming component is powered on, where the status information includes identification information of the energy-consuming component or current working status information of the energy-consuming component; determining a second voltage based on the status information; and converting the voltage input into the power source into the second voltage, and supplying power to the energy-consuming component based on the second voltage.

Abstract: This application provides a cabinet. The cabinet includes a cabinet body. A first-stage temperature control component configured to control a temperature of the cabinet body is disposed on the cabinet body, and at least one temperature control capacity expansion interface that may be used to connect a second-stage temperature control component and the cabinet body is disposed on the cabinet body, so that the second-stage temperature control component is disposed on the cabinet body in an expandable manner. The cabinet provided in this application can avoid a waste of a temperature control component, expand a heat dissipation capability of the cabinet, and resolve an existing problem that the temperature control component is wasted and the heat dissipation capability of the cabinet cannot meet an upgrade requirement due to replacement of the temperature control component when the heat dissipation capability of the cabinet is insufficient.

Abstract: An energy efficiency control method, where the method is applied to a communications device; the communications device comprises a primary power supply, a secondary power supply, and a control apparatus; and the method includes: obtaining a current load rate of the primary power supply and a load power of the secondary power supply; determining, based on the current load rate of the primary power supply and the load power of the secondary power supply, a target output voltage of the primary power supply and a target input voltage of the secondary power supply that satisfy an energy efficiency requirement of the communications device, where energy efficiency of the communications device is related to the energy efficiency of the primary power supply and the energy efficiency of the secondary power supply; and controlling the primary power supply to output the target output voltage, and controlling an input voltage of the secondary power supply to be the target input voltage.

Abstract: A charging pile system comprising a system input bus, charging pile circuit groups, a controller, a power allocation unit, and charging terminals. The power allocation unit comprises a first switch group, a second switch group, and a third switch group. The first switch group comprises first switching devices, the second switch group comprises second switching devices, and the third switch group comprises third switching devices. The first switching devices are coupled to respective output ends of the charging pile circuit groups so as to configure at least two idle charging pile circuit groups to be coupled either in series or in parallel to provide a first output. Each of the second switch group and the third switch group is configured to couple an input end of any of the charging terminals in series or in parallel to provide a second output to the charging pile circuit groups.

Abstract: A charging pile system includes a system input bus, a plurality of charging pile circuit groups, a power allocation unit, and a plurality of charging terminals that correspond to the plurality of charging pile circuit groups. The system input bus is connected to input ends of the plurality of charging pile circuit groups, and output ends of the charging pile circuit groups are connected to input ends of the charging terminals using the power allocation unit. The power allocation unit includes a first switch group, a second switch group, a third switch group, and a controller, and each switch group includes a plurality of switching devices.

Abstract: A system and method for supplying hydrogen gas, and a hydrogen fuel cell system are provided to solve inconvenience caused by the requirement for replacing a hydrogen storage container during hydrogen gas supplement. The system for supplying hydrogen gas includes a hydrogen storage unit, a hydrogen conveying unit and a charging device connected to the hydrogen storage unit, where the charging device includes a charging opening matched with a hydrogen gas infusing unit. It may be noted that according to the solution provided by the embodiments of the present disclosure, when hydrogen gas needs to be supplemented, an external infusing device may be used to infuse hydrogen gas to the hydrogen storage container in the hydrogen storage unit through the charging opening, which avoids replacement of the hydrogen storage container during an entire infusing process, and makes an intensive hydrogen gas supplement process more convenient and faster.

Abstract: The present application provides a heterojunction nano material, a negative pole piece of a lithium ion battery, and a lithium ion battery, where the heterojunction nano material includes a MoO3 nanobelt and a metal oxide in the alloy lithium intercalation mechanism coated on the surface of the MoO3 nanobelt. The negative pole piece of the lithium ion battery uses the heterojunction nano material as an active material, and the lithium ion battery using the negative pole piece of the lithium ion battery has a large reversible specific capacity and a high cycle stability.