6results about How to "Reduce voltage requirements" patented technology

The invention discloses a high-frequency rectification output series-parallel dynamic thermal switching circuit and a switching method in the technical field of switching circuits, and the circuit comprises at least two groups of transformers, a full-bridge rectification unit and a change-over switch, each group of transformer is provided with a primary winding and at least two secondary windings, the number of the full-bridge rectification units is the same as that of the secondary windings in each group of transformers, the secondary windings in each group of transformers are mutually independent, each secondary winding is electrically connected to each full-bridge rectification unit, and a change-over switch is arranged between at least one secondary winding in each group of transformers and the full-bridge rectification unit; all the full-bridge rectification units are electrically connected through the change-over switches, series-parallel connection switching among all the full-bridge rectification units is achieved, under the condition that output current and voltage are not interrupted, series-parallel connection switching of an output loop is achieved, meanwhile, the voltage withstanding requirement of an output capacitor is lowered, the service life of the capacitor is prolonged, and cost is reduced.

The utility model discloses a boost circuit and a photovoltaic inverter. The boost circuit comprises a switch module, a voltage clamping module and a PWM generator. The switch module comprises a first power switch tube and a second power switch tube which are connected to the positive end and the negative end of a direct current bus and are connected in series, and the voltage clamping module is connected to the positive end and the negative end of the direct current bus and is connected in series with a first resistor and a TVS array diode. The grid electrode of the first power switch tube is connected between the TVS array diode and the first resistor through a third resistor, a third transient suppression diode is connected in parallel between the collector electrode of the second power switch tube and the grid electrode of the first power switch tube, and a second resistor is connected in parallel between the collector electrode of the second power switch tube and the third resistor; the PWM generator is connected with the grid electrode of the second power switch tube and used for generating PWM pulses to drive the first power switch tube and / or the second power switch tube to be switched on and switched off, the voltage withstanding requirement of the power switch tubes can be effectively reduced through the booster circuit, and then the conversion cost of the booster circuit is reduced.

The embodiment of the invention provides a battery device, a power utilization device and an energy storage device. The performance of the battery device can be effectively improved. The battery device includes: a first battery cell set including at least one first battery cell; a second battery cell set including at least one second battery cell; the on-off device is used for switching working modes of the first battery monomer set and the second battery monomer set; wherein in the first direction, at least part of the first battery monomers and at least part of the second battery monomers are alternately arranged, the at least one second battery monomer is arranged between the at least one first battery monomer connected with the same confluence component, and / or the at least one second battery monomer is arranged between the at least one second battery monomer connected with the same confluence component. And the at least one first battery monomer is arranged between the at least one second battery monomer connected with the same confluence component.

The embodiment of the invention discloses an optical communication device for a deep sea environment. According to one specific embodiment, the optical communication device for the deep sea environment comprises a conical lens, a main reflector, a second reflector, a detector target surface, a lens mounting support and a connecting support, and the lens mounting support comprises a first lens mounting groove, a second lens mounting groove and at least one connecting column. At least one connecting column is connected between the first lens mounting groove and the second lens mounting groove; the main reflecting mirror is fixed in the first lens mounting groove, the conical lens is fixed in the second lens mounting groove, and the central points of the main reflecting mirror and the conical lens are on the central axis of the lens mounting bracket; the second reflecting mirror is fixed on at least one connecting column through a connecting bracket; and the detector target surface is fixed on one of the at least one connecting column. According to the embodiment, not only can the daylighting rate be ensured, but also the pressure-resistant requirement is reduced, the size and the weight of equipment are effectively reduced, and the manufacturing cost is reduced.

The application relates to a battery equalization method and device, a battery management system, equipment and a storage medium. The device is applied to a battery pack comprising a plurality of battery monomers connected in series, and the device comprises a transformer, an isolation switch and a control unit. The primary winding of the transformer is connected with a total positive electrode and a total negative electrode of the battery pack, the secondary winding of the transformer comprises a plurality of secondary windings, and the plurality of secondary windings are connected with the plurality of battery monomers in the battery pack one by one. The isolation switch assembly corresponds to the plurality of battery monomers in the battery pack one by one, and each isolation switch assembly is connected in series between the corresponding battery monomer and the secondary winding. The control unit is connected with the battery monomer and the isolation switch assembly to detect the voltage signal of each battery monomer and control the isolation switch assembly to be closed according to the voltage signal, so that the transformer balances the energy among the battery monomers in the battery pack. The application solves the problems of high cost, high complexity and slow equalization speed of the battery equalization function of the BMS system.

The utility model relates to a kind of branch waxing machine of all body hair can be removed, including power supply component, shell, U-shaped aluminium clamp, pI heating film, wax bottle, bottle cap and gyro wheel, shell has mounting groove, wax bottle is located in mounting groove, U-shaped aluminium clamp is from lower to upper sleeve set in the outer periphery of wax bottle, pI heating film is attached in the outer peripheral surface of U-shaped aluminium clamp, bottle cap is sleeve set in the upper of wax bottle, bottle cap upper surface is formed with accommodating groove, gyro wheel is rotatably connected in accommodating groove, power supply component is used to power supply pI heating film, power supply component is connected by USB interface, mini, safer to use, by miniaturization integrated design, compared with traditional branch waxing machine (110V / 220V power supply) reduce the volume of whole, so that branch waxing machine can be used for small part depilation.