Abstract: A rapid shutdown system and a method for controlling the rapid shutdown system are provided. A disturbance is applied to a direct-current side of an inverter in the rapid shutdown system only when the inverter does not meet a starting condition, i.e., before the inverter starts. Once meeting the starting condition, the inverter normally operates. A shutdown device in the rapid shutdown system determines its state by determining whether the electrical signal at its output end meets the preset condition, and switches itself on or off in response to its determination.

Abstract: An inverter and an integrated platform having the same are provided. The inverter includes a cabinet having a cabinet door; an inverter body arranged in the cabinet; and a heat exchanger arranged on an outer side of the cabinet, where the inverter body has an alternating-current side, and the cabinet door is arranged on the alternating-current side or an opposite side of the alternating-current side of the inverter body.

Abstract: Provided are a device for suppressing potential induced degradation and a system. The device includes a rectification circuit, a non-isolated voltage conversion circuit and at least one capacitor. An input terminal of the rectification circuit is connected to an output terminal of a converter, the rectification circuit is configured to rectify an alternating current outputted by the converter into a direct current, the non-isolated voltage conversion circuit is configured to perform voltage conversion on the direct current outputted by the rectification circuit, and the voltage conversion is boost conversion or voltage reverse conversion. The capacitor is connected in parallel with an output terminal of the direct current, and either a positive electrode or a negative electrode of the capacitor is grounded.

Abstract: A rapid shutdown system and a method for controlling the rapid shutdown system are provided. For each of shutdown devices in the rapid shutdown system, an electrical signal disturbance is applied to a direct current bus connected to the shutdown device at least once within each pre-shutdown period of the shutdown device, by an inverter in the rapid shutdown system operating in a mode of limited power output. Then, the shutdown device samples its input parameter and/or output parameter and determines, based on the sampled input parameter and/or the sampled output parameter, whether the electrical signal disturbance applied to the direct current bus meets a preset condition. The shutdown device switches itself on or remains in an ON state in response to a determination result that the electrical-signal disturbance already meets the preset condition.

Abstract: A conversion power supply and an autonomous electric energy replenishment method for an energy storage system are provided. An output terminal of the power supply module is connected to a second side of a first DC-DC converter through an energy storage element. A first side of the first DC-DC converter is connected to battery clusters of the energy storage system through a DC interface of the conversion power supply, so that under control by a conversion power supply controller, in a case that a voltage of a battery cluster is lower than a preset threshold, the first DC-DC converter receives the electric energy on the second side, and transmit the electric energy to the first side of the first DC-DC converter, to realize a electric energy replenishment function for at least one of the battery clusters and prevent battery failure due to over-discharge.

Abstract: A micro inverter having a plurality of independent inputs and a photovoltaic system are provided. The micro inverter includes multiple isolated DC-DC converters and a DC-AC converter. Each isolated DC-DC converter of the isolated DC-DC converters includes an inverter H-bridge, a transformer and a voltage-multiplying rectifier. An input terminal of the inverter H-bridges is configured to connect to a direct-current power supply. A secondary winding of the transformer is connected to an input terminal of the voltage-multiplying rectifier. An output terminal of the voltage-multiplying rectifier is connected to an input terminal of the DC-AC converter. A leakage inductor or an external inductor of the transformer forms series resonance along with a capacitor in the voltage-multiplying rectifier.

Abstract: A plug for a connector and the connector are provided. The plug includes an elastic main body, the elastic main body is provided with multiple through holes for cables to pass through; the plug includes a support body, the support body includes a first support body embedded in a middle part of the elastic main body, the through holes are provided around the first support body, and the support body has a hardness greater than that of the elastic main body. In this application, due to the elastic material characteristics of the elastic main body, when the claw members are squeezed by the first nut to contract and then the claw members force the plug tightly from periphery, the plug can generate a certain deformation to be tightly clamped by the claw members and press the cables from the outside to the middle part.

Abstract: Electrical equipment is provided. The electrical equipment includes a box body, a device, and a sealing member having both an electromagnetic shielding function and a sealing function. The device is detachably fixed on the box body, the sealing member is disposed between the box body and the device, and the base surface of the device can be attached to the installation surface of the box body, such that the sealing member can ensure the sealing installation of the box body and the device, and can also enable the base surface of the device to be closely attached to the installation surface of the box body to ensure the electromagnetic shielding function of conductive contact between the box body and the device.

Abstract: A single-stage multi-path direct current access converter and a control method thereof are provided. The single-stage multi-path direct current access converter includes an AC-side conversion circuit; at least two DC-side conversion circuits; and transformers corresponding to the at least two DC-side conversion circuits. AC sides of the at least two DC-side conversion circuits are respectively connected to primary windings of the corresponding transformers; secondary windings of the transformers are connected in parallel to a first side of the AC-side conversion circuit; each of the at least two DC-side conversion circuits is configured to invert DC power received by the DC-side conversion circuit, or to rectify AC power received by the DC-side conversion circuit; and the AC-side conversion circuit is configured to perform AC frequency conversion.

Abstract: A charging station with multiple plugs and a circuit for the charging station are provided. The circuit comprises a power distribution unit, a control unit, one AC/DC unit and multiple DC/DC units. The AC/DC unit is connected with an input end of each DC/DC unit via a bus; an output end of each DC/DC unit is connected to a corresponding charging plug port via the power distribution unit; and the control unit is configured to detect an output voltage of each of the DC/DC units, and control the power distribution unit to operate according to the output voltage of each of the DC/DC units and a power requirement of a charging plug port, to cause at least one of the DC/DC units to be connected to the charging plug port to achieve power distribution of the charging plug port.

Abstract: A high voltage battery cluster, and an overcurrent protection circuit and a switch box of the high voltage battery cluster are provided. The overcurrent protection circuit includes a first fusing module and a second fusing module. Since a withstand current-time curve of the first fusing module is different from a withstand current-time curve of the second fusing module, in a case that an overcurrent fault occurs in a high voltage battery cluster, one fusing module can cause an open circuit in the high voltage battery cluster prior to another fusing module, thereby preventing the high voltage battery cluster from being broken by a large current when an overcurrent fault occurs in the high voltage battery cluster, thus ensuring an electrical safety of the high voltage battery cluster.

Abstract: Provided are an off-grid start method and system for a new energy power generation system. The method includes: gradually boosting the voltage of a master according to a plurality of preset voltage given values, and slaves determining, by means of measuring a voltage of the load of a system, a target voltage given value used by the master; and the master determining, by means of monitoring an output current of the master itself, that a slave is successfully connected in parallel, and then continuing to boost the output voltage until all the slaves run in parallel. Therefore, according to the solution, no upper-layer synchronous control is required during a black-start process, and no communication between a master and slaves is required.

Abstract: An energy storage system and a switching power supply thereof are provided in the present disclosure. An alternating current AC input terminal of the switching power supply is connected to an AC power source via a protection fuse unit. A direct current DC input terminal of the switching power supply is connected to an energy storage unit in the energy storage system via a protection fuse unit. An output terminal of the switching power supply is connected to a master control unit in the energy storage system and an additional load in the energy storage system. Therefore, the switching power supply can receive electric energy from at least one of the energy storage unit and the AC power source, and supply power to the master control unit and the additional load in the energy storage system.

Abstract: An inverter and a heat radiation structure thereof are provided. The heat radiation structure of the inverter includes a heat radiator for radiating heat from a heating element of the inverter, and a heat radiation fan for air-cooling the heat radiator. The heat radiator includes multiple heat radiation fins able to be air-cooled. The number of the heat radiator is at least two, and two adjacent heat radiators are a first heat radiator and a second heat radiator respectively. The heat radiation fan is provided between the first heat radiator and the second heat radiator, and the heat radiation fan is located on the tops of the heat radiation fins. In the heat radiation structure of the inverter, the heat radiation fan is capable of cooling the first heat radiator and the second heat radiator at the same time.

Abstract: An energy storage apparatus is provided. The energy storage apparatus includes: a support structure, which is provided with at least one support layer in a height direction of the support structure; an energy storage device, an air outlet is defined at the top of the energy storage device, and an air inlet is defined on a sidewall of the energy storage device, where the number of the energy storage device is at least two, the energy storage devices are arranged in at least two layers through the support layer, and the support layer between adjacent layers of energy storage devices is hollowed out or configured in a partitioning manner; and an air guide structure mounted on the energy storage device and in communication with an air inlet of the energy storage device.

Abstract: Provided in the present invention are a battery cluster and an energy storage system, which are applied to the technical field of energy storage. The battery cluster comprises a plurality of battery packs and at least one first fuse, wherein each battery pack is connected to each first fuse in series, so as to form a series branch, and the obtained series branch is connected to a switch box provided with a second fuse. By means of the battery cluster provided in the present invention, at least one first fuse is connected in series in the battery cluster, and the first fuse matches a second fuse in a switch box, so as to realize dual protection; and when the second fuse in the switch box fails, protection can be realized depending on the first fuse, such that the fuse protection reliability is effectively improved, and the safe operation of the battery cluster and the energy storage system is ensured.

Abstract: A start method for a photovoltaic rapid shutdown system, an application apparatus and a system. In the method, an inverter system controls the voltage change of a corresponding direct current bus in a photovoltaic rapid shutdown system; and a photovoltaic module shutdown device performs determination according to a measured output voltage of itself, and controls itself to be turned on when the change characteristic of the voltage of the direct current bus connected to itself satisfies a preset turn-on condition. Therefore, merely by means of a self-contained voltage sampling device, the photovoltaic module shutdown device can determine whether a turn-on signal is received, without additionally providing a corresponding receiving device, thereby reducing hardware cost of the photovoltaic module shutdown device while realizing communication between the photovoltaic module shutdown device and the outside.

Abstract: An energy storage device and a battery cabinet are provided according to the present disclosure. The energy storage device includes a plurality of battery clusters and a high-voltage switch box. A positive input terminal of the high-voltage switch box is connected to positive electrodes of the plurality of battery clusters, a negative input terminal of the high-voltage switch box is connected to negative electrodes of the plurality of battery clusters, and an output terminal of the high-voltage switch box is configured to connect an electrical device. The high-voltage switch box is configured to control the plurality of battery clusters to be electrically connected to/disconnected from the electrical device. The cost of a battery cabinet is reduced in the present disclosure.

Abstract: An inverter, a power unit and a power module applied to the inverter are provided. The power unit includes a first package module, a second package module, and a third package module, each including two switch transistors that are complementary to each other. Since the first package module and the second package module are arranged in one half of the inner space of the power unit, and the third package module is arranged in the other half of the inner space of the power unit, the control terminal of each of the three package modules is arranged on a side of the half for arranging the package module that is away from the other half. Thus, the power unit can adopt a small-sized packaging structure without changing a layout of driver boards, thereby reducing the cost of the power unit and the inverter.