33results about How to "Increase the number of series" patented technology

The invention mainly relates to an electrical device of photovoltaic power generation. A scheme in which multistage photovoltaic cell strings and multistage voltage conversion circuits served as power optimizers are used in each photovoltaic assembly is adopted. Any stage voltage conversion circuit can execute independent maximum power point tracking calculation to one corresponding cell string individually so as to ensure stabilization of whole solar power generation system output power. Each power optimizer comprises one communication circuit which is used to form a communication carrier wave on a transmission line so that the power optimizer can send communication information to the outside world.

The invention relates to an electric automobile rapid charging system and method. The electric automobile rapid charging system comprises a power battery pack, a battery management system, a charginginterface, a charging positive electrode relay, a charging negative electrode relay and a structure conversion relay set. Through combination of closing states and disconnecting states of a pluralityof structure conversion relays in the structure conversion relay set, the series-parallel connection structures of battery units in the power battery pack are changed, the battery management system controls switching of the closing states and the disconnecting states of the charging positive electrode relay, the charging negative electrode relay and all the structure conversion relays the structure conversion relay set according to the upper limit of the charging voltage; and by changing the series-parallel connection structures of the power battery pack, on the premise that the charging current is not increased, the charging power is effectively improved, the charging time is shortened, meanwhile, the service life of the lithium ion battery is prolonged, the safety of the lithium ion battery is improved, the risk of early aging or overheating, caused by large-current charging, of the lithium ion battery is reduced, and safe and rapid charging of the power battery pack is realized.

The invention discloses a voltage detecting circuit for multiple serial batteries, comprising an operational amplifier, a first resistor, a second resistor, an insulated gate field-effect transistor and a voltmeter. The same-phase input end of the operational amplifier is used as a low potential detecting input end, the invert-phase input end of the operational amplifier is respectively connected with the source electrode of the insulated gate field-effect transistor and one end of the first resistor, the other end of the first resistor is used as a high potential detecting input end, the output end of the operational amplifier is connected with the grid electrode of the insulated gate field-effect transistor, the drain electrode of the insulated gate field-effect transistor is grounded through the second resistor, and the input end of the voltmeter is connected to the drain electrode of the insulated gate field-effect transistor and the contact of the second resistor. The voltage detecting circuit can be used for detecting the voltage of each electric core in tens to hundreds of serial battery packs and has the advantages of high detecting precision, low cost, low power consumption and the like.

The invention discloses a method for preparing cyclohexanol and cyclohexanone based on a multi-layer guide cylinder bubbling reactor. The method comprises the following steps: in a multi-layer guide cylinder bubbling reactor, oxidizing cyclohexane with an oxygen-containing gas to generate a cyclohexyl hydroperoxide-containing oxidation liquid, extracting an oxidation liquid with a strong base solution so as to obtain a cyclohexyl hydroperoxide-containing alkali water phase and a cyclohexane organic phase, performing a decomposition reaction on the cyclohexyl hydroperoxide-containing alkali water phase in the presence of a high-melting point solvent, performing sedimentation separation on a decomposition liquid, distilling the cyclohexane organic phase so as to obtain a mixture of cyclohexanol and cyclohexanone, and feeding back the extracted cyclohexane solution to the cyclohexane oxidation reaction process. By adopting the method, the oxidation selectivity and the reaction efficiencyof the cyclohexane can be greatly improved, and the cyclohexane distillation energy consumption can be reduced.

An electronic cleaner capable of improving the purifying rate of oil fume, waste gas and dioxin comprises saw-disc-structured negative plates each with a saw-tooth brim and a cylindrical positive plate; and the saw disk-shaped negative plates are distributed in the center of the cylindrical positive plate in a transplacement series connection structure. According to the electronic cleaner, an automatic detection device and an electric power system of a self-cleaning device are in parallel connection. The electronic cleaner also adopts the technical scheme that negative plates and the positive plates are comprised, the negative plates or the positive plates adopt a honeycomb structure, and the plates adopting a cylindrical structure enclose the honeycomb structured plates in the center. The electronic cleaner can also adopt the technical scheme that negative plates and positive plates are comprised, the negative plates or the positive plates adopt a honeycomb structure, and the flat structured plates are arranged at the position opposite to the honeycomb structured plates.

The invention discloses a 160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine, and relates to a combined cycle steam turbine. The problems that when a combinedcycle steam turbine adopts a rotating partition plate or seat cylinder valve mode, the occupied space is large, the shafting is too long, grade arrangement is influenced, and the unit efficiency is low are solved. A high-pressure cylinder is located between a front bearing box and a middle bearing box, a steam exhaust side claw of the high-pressure cylinder is supported on the front bearing box,a steam inlet side claw of the high-pressure cylinder is supported on the middle bearing box, and a steam inlet side claw of a middle-pressure cylinder is supported on the middle bearing box; and seventeen grades of fixed blade rings are installed in the high-pressure cylinder, twenty seven grades of movable blades are installed on a high-pressure rotor, twenty seven grades of assembling fixed blades are installed on the fixed blade rings, the tops of movable blades of the fixed blade rings are coated with abrasion-resistant coatings, plate bodies of the fixed blades are coated with abrasion-resistant coatings, first ten grades of blade tips of the high-pressure rotor adopt a brush steam sealing mode, and the high-pressure rotor and the fixed blade plate bodies are sealed by adopting the mode of inlaying steam sealing sheets into the rotor. The 160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine is applied to a 160-MW-grade axial steam exhaust and condensate extraction type steam turbine.

The invention provides an intelligent photovoltaic module and a photovoltaic power generation system. The parameters are detected through a detection control unit and on-off of the switch in a switchunit is controlled when the parameters meet the preset switching condition so that a voltage limiting circuit arranged at both ends of a corresponding battery substring or at both ends of a battery module is switched on or off, and thus a power optimizer can be substituted to realize the voltage adjustment. The maximum series number of the components of the strings can be enhanced and the problemof high cost due to the use of the power optimizer can be avoided.

The invention mainly relates to a power optimizer. The power optimizer is used for performing voltage conversion on a one-stage or multi-stage photovoltaic cell string, and includes one-stage or multi-stage BUCK circuits, wherein first and second input ends of any one stage of BUCK circuit are respectively coupled with an anode end and a cathode end of the corresponding one-stage photovoltaic cell string; and an output capacitor of any one stage of BUCK circuit is connected between a first output node and a second output node of the any one stage of BUCK circuit, so that the output voltage of the single-stage photovoltaic cell string is provided between a first output node and a second output node of a single-stage BUCK circuit, or the total output voltage for the multi-stage photovoltaic cell string is formed between the first output node of the first first-stage BUCK circuit and the second output node of the last last-stage BUCK circuit in the multi-stage BUCK circuits.

The invention provides an intelligent photovoltaic module and a photovoltaic power generation system. Parameters of the intelligent photovoltaic module are detected through a detection control unit, and when the parameters meet a preset switching condition, on-off of each switch in the switch unit is controlled to change a connection relationship between battery sub-strings in the battery unit soas to replace a power optimizer to realize adjustment of the voltage of the intelligent photovoltaic module; and the problem of high cost caused by the adoption of the power optimizer is avoided whilethe maximum number of components connected in series of the string is increased.

The invention discloses a method for preparing cyclohexanol and cyclohexanone based on a multilayer draft tube bubbling reactor. The method is to oxidize cyclohexane with an oxygen-containing gas in the multilayer draft tube bubbling reactor to generate Containing the oxidized solution of cyclohexyl hydroperoxide, then extracting the oxidized solution with a strong alkali solution to obtain an alkaline aqueous phase containing cyclohexyl hydroperoxide and an organic phase of cyclohexane, the alkaline aqueous phase containing cyclohexyl hydroperoxide at high The decomposition reaction is carried out in the presence of a boiling point solvent. After the decomposition liquid is settled and separated, the organic phase is distilled to obtain a mixture of cyclohexanol and cyclohexanone, and the extracted cyclohexane solution is returned to the cyclohexane oxidation reaction process; this method can greatly improve the cyclohexanol Alkoxylation selectivity and reaction efficiency reduce energy consumption for cyclohexane distillation.

The invention relates to the technical field of water pumps, in particular to an efficient submersible pump. The efficient submersible pump comprises a first parent, second parents, daughters, an endcover, a motor, a motor sealing box and a controller; the motor is used for providing power to the first parent; the first parent is used for transferring power of the motor to two daughters connectedwith the first parent and the second parents; one ends of the second parents are connected with the first parent, and the other ends of the second parents are connected with the end cover; two sidesof the second parents are connected with the daughters; two adjacent second parents are serially connected through clamping groove structures and couplings; at least two second parents are provided; the daughters are used for absorbing external water into the first parent and the second parents; and a water outlet pipe is arranged on the first parent. The serial connecting number of the second parents can be increased through a clamping mode to increase the length of the submersible pump, so that the use environment of synchronously pumping water in multiple pits of a pond is met, and the pumped water quantity can be increased.

The invention provides an intelligent photovoltaic module and a photovoltaic power generation system. The parameters are detected through a detection control unit and on-off of the switch in a switchunit is controlled when the parameters meet the preset switching condition so that a voltage limiting circuit arranged at both ends of a corresponding battery substring or at both ends of a battery module is switched on or off, and thus a power optimizer can be substituted to realize the voltage adjustment. The maximum series number of the components of the strings can be enhanced and the problemof high cost due to the use of the power optimizer can be avoided.

The invention discloses a method for preparing cyclohexanol and cyclohexanone based on a multi-layer annular flow guide cylinder bubbling reactor. The method comprises the following steps: in a multi-layer annular flow guide cylinder bubbling reactor, oxidizing cyclohexane with an oxygen-containing gas to generate a cyclohexyl hydroperoxide-containing oxidation liquid, extracting an oxidation liquid with a strong base solution so as to obtain a cyclohexyl hydroperoxide-containing alkali water phase and a cyclohexane organic phase, performing a decomposition reaction on the cyclohexyl hydroperoxide-containing alkali water phase in the presence of a high-melting point solvent, performing sedimentation separation on a decomposition liquid, distilling the cyclohexane organic phase so as to obtain a mixture of cyclohexanol and cyclohexanone, and feeding back the extracted cyclohexane solution to the cyclohexane oxidation reaction process. By adopting the method, the oxidation selectivity and the reaction efficiency of the cyclohexane can be greatly improved, and the cyclohexane distillation energy consumption can be reduced.

The invention relates to a fast charging system and method for an electric vehicle. The system includes a power battery pack, a battery management system, a charging interface, a positive charging relay, a negative charging relay, and a structure conversion relay group. Multiple structures in the relay group are changed through the structure The combination of closed and disconnected states of the conversion relay changes the series-parallel structure of the battery cells in the power battery pack, and the battery management system controls the closing, closing, Disconnect state toggle. By changing the series-parallel structure of the power battery pack, the charging power can be effectively increased without increasing the charging current, the charging time is shortened, the life and safety of the lithium-ion battery are improved, and the lithium-ion battery is reduced due to high current charging. Therefore, the risk of premature aging or overheating phenomenon is caused, and the safe and fast charging of the power battery pack is realized.

The smart photovoltaic module and the photovoltaic power generation system provided by the present invention detect the parameters of the smart photovoltaic module through the detection control unit, and when the parameters meet the preset switching conditions, control the on-off of each switch in the switch unit, and change each switch in the battery unit. The connection relationship between battery substrings can replace the power optimizer to adjust its own voltage; while increasing the maximum number of components in series in the string, it avoids the problem of high cost caused by the use of power optimizers.

The invention discloses a semiconductor opening switch (SOS)-based ultra-wide spectrum pulse generator with 100 kHz pulse frequency, and belongs to the technical field of pulse power. The pulse generator comprises a charging power supply, a primary low-voltage quick pulse generation unit, a magnetic saturation linear transformer, a pumping capacitor, an SOS and a load in sequence. A plurality of primary low-voltage quick pulse generation units are uniformly arranged at the periphery of each single module and thus the primary current output capacity is increased. A trigger controls the on and off of a metal oxide semiconductor field effect transistor (MOSFET) to generate scores of ns to hundreds of ns pulse with a repeated frequency of 100kHz. The magnetic saturation linear transformer is formed by connecting a plurality of single modules in series. On one hand, the output voltage can be increased by increasing the series number of the single module; on the other hand, after the transformer core is saturated, the secondary side is a coaxial squirrel cage structure, the inductance of a reversed pump is reduced, the time of a reversed current pump can be shortened, an SOS quickly cuts off current, and a high-voltage ultra-wide spectrum pulse is generated in the load. A mismatching charging mode from a primary energy storage large capacitance to a secondary pump small capacitance is used to obtain a high voltage on a pumping capacitor; and on the other hand, under the same target voltage, the series number of the single module is reduced, the inductance of the reversed pump is reduced, and 100kHz ultra-wide spectrum pulse generation is promoted.

The invention discloses a voltage detecting circuit for multiple serial batteries, comprising an operational amplifier, a first resistor, a second resistor, an insulated gate field-effect transistor and a voltmeter. The same-phase input end of the operational amplifier is used as a low potential detecting input end, the invert-phase input end of the operational amplifier is respectively connectedwith the source electrode of the insulated gate field-effect transistor and one end of the first resistor, the other end of the first resistor is used as a high potential detecting input end, the output end of the operational amplifier is connected with the grid electrode of the insulated gate field-effect transistor, the drain electrode of the insulated gate field-effect transistor is grounded through the second resistor, and the input end of the voltmeter is connected to the drain electrode of the insulated gate field-effect transistor and the contact of the second resistor. The voltage detecting circuit can be used for detecting the voltage of each electric core in tens to hundreds of serial battery packs and has the advantages of high detecting precision, low cost, low power consumption and the like.

The invention mainly relates to an electrical device of photovoltaic power generation. A scheme in which multistage photovoltaic cell strings and multistage voltage conversion circuits served as power optimizers are used in each photovoltaic assembly is adopted. Any stage voltage conversion circuit can execute independent maximum power point tracking calculation to one corresponding cell string individually so as to ensure stabilization of whole solar power generation system output power. Each power optimizer comprises one communication circuit which is used to form a communication carrier wave on a transmission line so that the power optimizer can send communication information to the outside world.

The invention provides an assembly voltage limiting method, an application device and system thereof. According to the method, by detecting the parameters of a photovoltaic cell string, whether the parameters of the photovoltaic cell string meet a voltage limiting enabling condition or a voltage limiting releasing condition is judged; if the parameters of the photovoltaic cell string meet the voltage limiting enabling condition, at least one photovoltaic cell in the photovoltaic cell string is controlled to work in a voltage limiting mode, so that the voltage of the photovoltaic cell string isreduced, the number of photovoltaic modules connected in series can be increased while it is guaranteed that the highest voltage of the system does not exceed the corresponding requirement, and the system cost is reduced; and if the parameters of the photovoltaic cell string meet the voltage limiting release condition, the photovoltaic cells working in the voltage limiting mode are controlled torecover normal output, so that the output voltage of the photovoltaic cell string is improved so as to improve the DC voltage utilization rate and the DC / AC capacity ratio of the photovoltaic system.