Abstract: This disclosure provides an energy storage apparatus, an energy storage apparatus control method, and a photovoltaic system. The energy storage apparatus includes: a plurality of battery clusters, a plurality of conversion units, a start unit, and a controller. The controller includes a plurality of control units. The start unit is configured to: after receiving a start signal, control a control switch in at least one battery cluster to close, to start a control unit corresponding to the battery cluster. The control unit is configured to: determine, based on a state of the control switch in the battery cluster, whether a black start mode is on; and when determining that the black start mode is on, control a DC-DC converter in the corresponding conversion unit to release electric energy stored in a battery pack in the corresponding battery cluster, to energize a direct current bus.

Abstract: A battery management system is provided in this application, which includes a monitoring module and a sampling module. The sampling module performs sampling on an operating parameter of a direct current converter to obtain target sampling information, and sends the target sampling information to the monitoring module. The monitoring module receives the target sampling information sent by the sampling module, and sends the target sampling information to a central monitoring unit, so that the central monitoring unit determines target charge power for charging an energy storage battery by a power conversion system PCS; and receives a first control instruction sent by the central monitoring unit, and controls the direct current converter to adjust charge power for charging the energy storage battery by the power conversion system PCS to the target charge power.

Abstract: Some embodiments include a first electronic device that automatically sends a first search request and a second search request. The first search request is used in a search for an electronic device having a first projection receiving capability related to a first projection protocol, and the second search request is used in a search for an electronic device having a second projection receiving capability related to a second projection protocol. In some embodiments the first electronic device receives a first feedback message or a second feedback message, or any combination thereof, from a second electronic device, and the first electronic device automatically displays, in response to the first feedback message, the second feedback message, the first identity related to the second electronic device.

Abstract: In accordance with an embodiment, an energy storage system includes energy storage container that a temperature control system, a battery cluster, and a controller. The controller determines a specified temperature of the temperature control system corresponding to a maximum difference between an available capacity of the battery cluster and a power consumption of the temperature control system as a target temperature. The determination of the specified temperature is based on: a correspondence between the available capacity of the battery cluster and a plurality of different specified temperatures in a specified temperature set of the temperature control system, and a correspondence between the power consumption of the temperature control system and the plurality of different specified temperatures in the specified temperature set of the temperature control system. The temperature control system is configured to adjust a temperature inside the energy storage container to the target temperature.

Abstract: An energy storage system is provided, where the energy storage system may include an energy storage module and a power conversion module. The energy storage module may be configured to generate a target waveform signal on the direct current bus when receiving a black start signal. In this case, the power conversion module may be configured to: detect the target waveform signal on the direct current bus, and turn on based on the target waveform signal. When the power conversion module cannot receive a power-on instruction of an energy management system, the power conversion module may also actively turn on when detecting the target waveform signal on the direct current bus, to implement a black startup. This features low costs and higher applicability.

Abstract: An energy storage system, to improve operating efficiency and system reliability that exist when a component in the energy storage system is faulty, and avoid a waste of resources. The energy storage system includes a plurality of energy storage branches, at least one switch unit, and a control circuit. Each of the energy storage branches includes a first bus, a string-level converter, and a battery string that are sequentially connected in series, a plurality of balancing converters, and a shared bus. The battery string includes a plurality of battery units connected in series, and each of the battery units includes one battery pack. The battery pack is connected to an input side of one corresponding balancing converter, and output sides of the plurality of balancing converters are separately connected to the shared bus.

Abstract: An energy storage system and a method for controlling the energy storage system, includes a plurality of energy storage units. The energy storage unit includes a plurality of battery cells, a plurality of balancing units, a voltage conversion unit, a first switch, a second switch, and a control unit. The control unit is configured to detect fault cases of the plurality of battery cells, and control open and closed states of the first switch and the second switch. According to the application, it can be ensured that each energy storage unit in the energy storage system can continuously work when a battery cell is faulty and when state of charge balance between battery cells is implemented, thereby greatly improving reliability of the energy storage system with low costs.

Abstract: A data transmission method and a device are provided. When determining that the first network element and the second network element is disconnected, the first network element stores identification information of the last frame of data and connection status information that are transmitted before the connection is disconnected. When determining a condition for re-communication is meet, the first network element generates a third key based on a first key and a second key, where the first key is a key used to transmit the last frame of data, and the second key includes a key used by the first network element and the second network element to transmit each of j frames of data before the last frame of data. The first network element communicates with the second network element based on the third key, identification information of an ith frame of data, and the connection status information.

Abstract: A display picture synchronization method includes a source device that sends a first picture frame and a first specified display time corresponding to the first picture frame to each of the sink devices. If each of the sink devices successfully receives the first picture frame and determines that the first picture frame is capable of being displayed based on the first specified display time, each of the devices for performing picture frame synchronization display displays the first picture frame based on the first specified display time. Each of the devices for performing picture frame synchronization display does not display the first picture frame if a first sink device in the sink devices fails to receive the first picture frame or successfully receives the first picture frame but determines that the first picture frame is incapable of being displayed based on the first specified display time.

Abstract: In an embodiment a screen projection method includes determining, by a project end, to-be-projected data when a screen projection function is enabled, obtaining, by the project end, first data permission of the project end for the to-be-projected data and second data permission of a receive end for the to-be-projected data when the to-be-projected data is media data and projecting, by the project end, the to-be-projected data onto the receive end in a screen mirroring manner when the first data permission is higher than the second data permission or projecting, by the project end, the to-be-projected data onto the receive end in a digital living network alliance manner when the first data permission is lower than the second data permission.

Abstract: A linkage protection system includes an inverter, an anti-potential-induced degradation (PID) apparatus, and an insulation-monitoring apparatus. The anti-PID apparatus is configured to inject a voltage into an input end or an output end of the inverter, to increase or decrease a voltage-to-earth of a photovoltaic system. The insulation-monitoring apparatus is configured to inject an insulation-monitoring voltage into a direct current (DC) side or an alternating current (AC) side of the inverter. The anti-PID apparatus and the insulation-monitoring apparatus directly or indirectly communicate with each other, to learn of information about whether a peer apparatus is operating, and perform linkage control. The anti-PID apparatus and the insulation-monitoring apparatus operate in different time periods.

Abstract: Some embodiments include a first electronic device that automatically sends a first search request and a second search request. The first search request is used in a search for an electronic device having a first projection receiving capability related to a first projection protocol, and the second search request is used in a search for an electronic device having a second projection receiving capability related to a second projection protocol. In some embodiments the first electronic device receives a first feedback message or a second feedback message, or any combination thereof, from a second electronic device, and the first electronic device automatically displays, in response to the first feedback message, the second feedback message, the first identity related to the second electronic device.

Abstract: An energy storage system includes at least one battery rack and a controller. Each battery rack includes a direct current/direct current (DC/DC) converter and a plurality of battery units. The plurality of battery units is connected in series to the DC/DC converter, so that the battery rack can obtain charging power or output discharging power by using the DC/DC converter. Each battery unit includes a cell and an optimizer, and the optimizer of each battery unit is configured to perform bypass or series connection control on the cell in the same battery unit. The controller is connected to each battery unit, and the controller is configured to, when detecting that a fault occurs in a battery unit, control an optimizer of the faulty battery unit to bypass a cell in the faulty battery unit.

Abstract: Embodiments of this disclosure provide an energy storage system and a control method thereof. The energy storage system includes: a cabinet; an energy storage device, a first sensing apparatus, and configured to sense a concentration of flammable gas in the cabinet; a ventilation apparatus, disposed on the cabinet, where the ventilation apparatus is configured to exhaust the flammable gas from the cabinet; and a controller, communicatively coupled to the first sensing apparatus and the ventilation apparatus, and configured to: receive first sensing information indicating the concentration of the flammable gas from the first sensing apparatus, and generate, based on the first sensing information, a signal for controlling the ventilation apparatus.

Abstract: A projection method and system to control at least two of the following: projection content, a projection device, and projection time. The projection method includes: obtaining a projection condition that includes at least two of the following: a projection content condition, a projection device condition, and a projection time condition; receiving a projection instruction used to request to project, to a destination electronic device, multimedia content currently displayed by a source electronic device. The projection instruction includes projection information and if the projection information satisfies the projection condition, the projection method performs projection playback based on a uniform resource locator of the projection content in the projection information.

Abstract: An inflatable equipment with a starting power supply is disclosed, which belongs to the technical field of inflatable equipments. The inflatable equipment with a starting power supply includes a housing; a battery pack, fixedly provided in the housing, and the housing is fixedly provided with a connection interface electrically connected to the battery pack; and an inflator pump module, fixedly provided in the housing. Herein the inflator pump module is electrically connected to the battery pack, the housing is opened with an air inlet, an input end of the inflator pump module is connected to the air inlet, the housing is fixedly provided with an inflatable interface, and the inflatable interface is connected to an output end of the inflator pump module. The inflatable equipment has a compact and small structure, which is easy to be stored and carried, thereby improving user's experience.

Abstract: Aspects of the disclosure provide a method for fabricating a semiconductor device having an first stack of alternating insulating layers and sacrificial word line layers arranged over a substrate, the first stack including a core region and a staircase region. The method can include forming a first dielectric trench in the core region of the first stack, forming a second dielectric trench that is adjacent to and connected with the first dielectric trench in the staircase region of the first stack, and forming dummy channel structures extending through the first stack where the dummy channel structures are spaced apart from the second dielectric trench.