33results about How to "Reduce voltage drop" patented technology

The invention provides an electrolyte, an electrochemical device and an electronic device, the electrolyte comprises lithium difluorophosphate, a dinitrile compound and diethyl carbonate, based on the total mass of the electrolyte, the mass percentage content of the dinitrile compound is A%, the mass percentage content of the diethyl carbonate is B%, 10 < = A + B < = 24, and 0.8 < = A < = 3. The electrolyte comprising the lithium difluorophosphate, the dinitrile compound and the diethyl carbonate is adopted, the value of A + B is regulated and controlled, and the value of A is within the range, so that the high-temperature storage performance, the high-temperature cycle performance, the low-temperature discharge performance and the safety performance of the electrochemical device can be improved.

The invention relates to a composite heat insulation felt of basalt fiber cloth reinforced basalt fiber felt for a fireproof cable and a preparation method and application of the composite heat insulation felt, and relates to the technical field of fireproof heat insulation materials, the preparation method comprises the following steps: pretreating basalt fibers to obtain first basalt fibers; the basalt fiber cloth is clamped between the two lapping layers of the first basalt fibers, then needling, cutting and rolling are conducted, and the basalt fiber cloth reinforced basalt fiber needled felt is obtained; and adding the basalt fiber cloth reinforced basalt fiber needled felt into a silicon dioxide sol precursor hydrolysate, and carrying out dipping treatment to obtain the basalt fiber cloth reinforced basalt fiber needled felt composite silicon dioxide sol. The basalt fiber cloth reinforced basalt fiber felt composite heat insulation felt for the fireproof cable provided by the invention has the characteristics of high tensile strength, moisture resistance, water resistance, low high thermal conductivity coefficient, no cracking at high temperature, no pulverization and the like.

The invention relates to the technical field of lithium ion battery positive electrode materials, and particularly discloses a transition metal layered structure lithium ion battery positive electrode material modification method, which comprises the following steps: mixing a transition metal lithium ion battery positive electrode material suspension and a peroxide radical-containing aqueous solution, and fully stirring to react; and carrying out heat treatment on the reacted product to obtain the modified transition metal layered structure lithium ion battery positive electrode material. Controllable construction of a spinel / rock salt phase protective layer on the surface of the positive electrode of the transition metal oxide lithium ion battery is realized, meanwhile, a Li / O double-vacancy defect structure is introduced, and surface byproducts such as lithium carbonate on the surface of the positive electrode material of the lithium ion battery can be eliminated; the coulombic efficiency of the lithium ion positive electrode material during first charge and discharge is effectively improved, the voltage drop is reduced, the capacity retention ratio is improved, and meanwhile, the gas production problem in the lithium ion battery cycle process is effectively reduced.

The invention provides a voltage drop compensation method and a related device, and the method comprises the steps: receiving a feedback signal from a calculation chip, the feedback signal being used for representing that the calculation chip starts to execute a target calculation program; obtaining current output delay of the power management chip; obtaining a running state of the target calculation program; when the running state of the target calculation program is a target state, a current output signal is sent to a power management chip, and the target state is used for representing that the time interval between the current time point and the target time point is equal to the current output delay; the target time point refers to the time point when the calculation chip executes the high-power-consumption calculation task next time to generate the voltage drop. Therefore, when the calculation chip executes a high-power-consumption calculation task next time to generate the voltage drop, the generated large voltage drop can be compensated through the output peak current, and operation faults of the chip are avoided.

The invention discloses a semiconductor device and a manufacturing method thereof, relates to the technical field of semiconductors, and aims to solve the problem of signal line congestion caused by device miniaturization. The semiconductor device includes a substrate, a first layer semiconductor structure, a second layer semiconductor structure, a first contact structure, and a second contact structure. The second layer of semiconductor structures are arranged above the first layer of semiconductor structures at intervals along the thickness direction of the substrate. The first contact structure is disposed within the substrate. The first contact structure comprises a first contact part which is in electrical contact with a first source / drain region included in the transistor in the first layer of semiconductor structure, and a second contact part which is in electrical contact with the first gate stack structure. The second contact structure is arranged on the side, away from the first layer of semiconductor structure, of the second layer of semiconductor structure. And the second contact structure comprises a third contact part which is electrically contacted with a second source / drain region included in the transistor in the second layer of semiconductor structure, and a fourth contact part which is electrically contacted with the second gate stack structure.

The utility model discloses a grid for a storage battery of a golf cart. Belongs to the technical field of golf cart storage batteries. The storage battery mainly solves the problem that the service life of the storage battery is shortened due to premature corrosion of a grid in the use process of the conventional storage battery of the golf cart. The grid for the storage battery of the golf cart is mainly characterized by comprising an upper frame, a vertical frame, a lower frame, longitudinal ribs, transverse ribs and tabs, the number of the longitudinal ribs is larger than that of the transverse ribs. The sectional area of the longitudinal ribs is larger than that of the transverse ribs. The grid for the storage battery of the golf cart has the characteristics of improving the strength of the grid, improving the conductivity of the grid, improving the corrosion resistance of the grid and prolonging the service life of the storage battery of the golf cart, and is mainly used for the storage battery of the golf cart.

In order to solve the deficiency of 1,3-propanesultone as an additive, the application provides a lithium battery electrolyte and a lithium battery. The electrolyte comprises an organic solvent, a lithium salt and an additive, and the additive comprises a thiophene compound as shown in general formula (I), wherein R1 is a non-hydrogen group, R2-R3 are H or an organic group, and at least one of R1-R3 is a halogen-substituted or unsubstituted pinacol borate group. The thiophene compound in the electrolyte of the application can replace 1,3-propanesultone, and can participate in the film formation of the positive and negative electrodes, improve the electrode kinetic and thermodynamic properties, reduce the impedance of the interface film, reduce the gas production during battery formation and storage, improve the voltage drop of the battery during full charge storage, and improve the stability of the electrolyte.

The invention relates to a high-efficiency power supply circuit which is characterized by comprising an input rectification module which is arranged by adopting a bridge type rectification circuit structure and is used for converting input alternating current into direct current, the output end of the input rectification module is connected with an APFC booster circuit, the output end of the APFC booster circuit is connected with a resonance circuit, and the resonance circuit is connected with an output end of the input rectification module. The LLC resonant circuit is used for improving voltage conversion efficiency and reducing switching loss through a soft switching function, an output end of the LLC resonant circuit is connected with a synchronous rectification circuit, and the synchronous rectification circuit is used for rectifying output of the LLC resonant circuit and providing rectified direct current for a subsequent load or a battery for charging.

The embodiment of the present application provides a kind of line voltage regulating equipment.The equipment includes: control device, and multiple voltage regulating devices and multiple monitoring devices arranged in different line sections of distribution line;Specifically, each monitoring device is used to collect the real-time line data of the line section, and is sent to control device;Control device includes data analysis module, adjustment instruction generation module and first communication module;Each voltage regulating device is used to adjust the line parameter of the line section according to the received adjustment instruction, to realize the voltage optimization of line section.Through this line voltage regulating equipment, the voltage stability of each section of line can be realized, while local adjustment and network optimization are considered, and the flexibility and reliability of distribution network are improved.

The present invention relates to the technical field of lithium battery material preparation, specifically a layered lithium-rich positive electrode material, a preparation method and a lithium-ion battery regulated by Fe / Mg doping. The present invention prepares a multi-element doped lithium-rich layered positive electrode material by co-doping Fe and Mg on the basis of a cobalt-free lithium-rich layered positive electrode material having an R-3m space group structure to partially replace Mn and Li in a transition metal layer. In the positive electrode material prepared by the present invention, the doping of the Fe element can reduce the covalency between the transition metal and oxygen, thereby suppressing the irreversible oxygen loss of the first cycle, and the Mg element replacing lithium can reduce the Li / Ni mixing, and can support the layered structure. The introduction of the two elements Fe and Mg stabilizes the structure of the material, improves the cycle performance and rate performance of the material, and significantly alleviates the voltage drop of LNMO, thereby improving the overall electrochemical performance of the material.

The utility model discloses a three-phase LLC resonant converter. The converter is composed of a first-phase LLC resonant converter, a second-phase LLC resonant converter and a third-phase LLC resonant converter which are connected in sequence. And the input end of the first-phase LLC resonant converter is connected in series with the input ends of the second-phase LLC resonant converter and the third-phase LLC resonant converter to form a common input end. The output end of the first-phase LLC resonant converter, the output end of the second-phase LLC resonant converter and the output end of the third-phase LLC resonant converter are connected in parallel to form a common output end. The phase difference between any two resonant converters in the three-phase LLC resonant converter is 120 degrees. And the first-phase LLC resonant converter, the second-phase LLC resonant converter and the third-phase LLC resonant converter share one magnetic integrated transformer. Each of the first-phase LLC resonant converter, the second-phase LLC resonant converter and the third-phase LLC resonant converter is provided with two resonant circuits. According to the invention, the conduction loss of the three-phase LLC resonant converter can be reduced.

The invention relates to the technical field of motors and control, in particular to a stator power supply method of a long stator linear motor, which effectively reduces partial voltage of winding leakage reactance by subdividing a segmented winding into a winding branch A and a winding branch B and combining'pre-switching-on 'and'delayed switching-off' of uncovered segments of a vehicle. In addition, through star-shaped connection of center end points of winding branches A and B and adoption of a double-path power supply for power supply, at least two adjacent branches are ensured to be supplied with power at any time. The output transformer is arranged for the single frequency converter, the two secondary sides of the transformer share the same primary side excitation transformer, and dynamic load balancing is achieved. For doubly-fed linear motor control, a power supply adopts a variable control mode. According to the method, under the technical condition that the step changing control frequency and the power supply interval are kept basically unchanged, under the set winding voltage withstanding level, stator power supply section division is more effectively regulated and controlled, higher rotor counter electromotive force can be overcome for operation, and then the maximum operation speed of a vehicle is increased.

The present application discloses a display panel and a manufacturing method thereof, and a display device, wherein the display panel comprises: a substrate; a plurality of sub-pixels, arranged on the substrate; a pixel defining layer, arranged on the substrate, the pixel defining layer is used to define the positions of the plurality of sub-pixels; an isolation column, arranged on the pixel defining layer, the isolation structure is used to isolate the plurality of sub-pixels, the isolation column comprises a first insulating layer, a conductive layer, and a second insulating layer stacked in sequence, the cathode layers of two adjacent sub-pixels are connected through the conductive layer; a cathode auxiliary layer, arranged on the second insulating layer, the cathode auxiliary layer is connected to the conductive layer through a via hole on the second insulating layer. In the above manner, the resistance on the cathode layer can be reduced, thereby reducing the voltage drop, and thus improving the picture quality of the display panel.

The invention discloses a flexible LED lamp strip with a novel linking technology and a using method, and relates to the technical field of LED lamp strips, the flexible LED lamp strip comprises a controller shell, the controller shell is rotatably connected with a shell cover, a power supply module is arranged in the controller shell, a control panel is arranged in the controller shell, and the shell cover is rotatably connected with the controller shell. The control panel is connected with the power supply module through an electric wire, the control panel is connected with at least two connecting terminals used for controlling signal output, and at least two circuit boards are clamped and placed on the side, close to the shell cover, of the controller shell through fixing plates on the two sides. And each connecting terminal is inserted into the interface of each circuit board. Power is supplied through the 24V bus, a set of 24V-to-5V voltage reduction module is arranged per meter, voltage drop can be remarkably reduced, it is ensured that each lamp bead can obtain stable 5V voltage, and the problem that the brightness of the lamp bead at the tail end is reduced or the lamp bead cannot work normally due to insufficient voltage is solved.

The utility model provides an aluminum electrolysis cell steel-copper-aluminum composite cathode conductive structure which comprises a cathode carbon block, a cathode steel conductive piece, a carbon steel connecting piece and a cathode copper conductive piece, a first mounting groove is formed in the cathode carbon block, and the cathode steel conductive piece is arranged in the first mounting groove and electrically connected with the cathode carbon block through the carbon steel connecting piece; a second mounting groove is formed in the cathode steel conductive piece, the cathode copper conductive piece is arranged in the second mounting groove and is electrically connected with the cathode steel conductive piece, the copper-aluminum connecting piece comprises a copper part and an aluminum part which are compounded together, the copper part is electrically connected with the copper-aluminum connecting piece, and the aluminum part is used for being electrically connected with a cathode aluminum bus. When the steel-copper-aluminum composite cathode conductive structure of the aluminum electrolysis cell is used, compared with the prior art, the voltage drop generated when current passes through a copper-steel interface, the cathode conductive steel bar and the steel-aluminum explosion block is omitted, so that the voltage drop of the cathode conductive structure is greatly reduced, and invalid energy consumption is reduced.

The present invention discloses a step-down circuit, a backup power module, a server, a step-down charging method and a device. It relates to the field of power supply technology. A bootstrap boost circuit is combined with a first switch tube. When the power supply voltage of the server mainboard is loaded to the second end of the first switch tube, since the voltage of the bootstrap voltage output end of the current bootstrap boost circuit is 0V, the first switch tube is disconnected. At this time, the first switch tube is used to prevent backflow. On the basis of the first switch tube preventing backflow to the first capacitor from overcurrent, a bootstrap boost circuit is added. At the second moment of hot plugging, the level signal given by the output end of the control module and the bootstrap technology are used to increase the output voltage of the circuit, and the output bootstrap voltage is used as the driving voltage of the first switch tube to drive and control the conduction of the first switch tube. The driveability of the output voltage is improved, and the conduction of the first switch tube is driven by a sufficiently high driving voltage, while also improving the maintenance operability of the backup power module.

The application relates to the technical field of voltage compensation control, in particular to a power distribution line dynamic compensation adjustment method for preventing voltage fluctuation. The method comprises the following steps: acquiring voltage deviation degrees and reactive power variation synchronization degrees between each trunk node and each compensation point at each moment; acquiring limit coefficients of each trunk node, and dividing an alternating current power grid area into reactive power compensation coverage sub-areas dominated by each compensation point; calculating line losses of trunk lines in each reactive power compensation coverage sub-area, and acquiring multi-time scale estimation information; acquiring compensation parameters of reactive power compensation devices in each reactive power compensation coverage sub-area, and then correcting compensation capacities of the reactive power compensation devices to dynamically compensate the power distribution line. The application aims to reduce active power loss and voltage drop and improve overall power quality.

The invention discloses a fast charging station space-time pricing method, device and system, and a storage medium. The method comprises the following steps: constructing a fast charging load space-time distribution model based on vehicle owner preference; according to the fast charging load space-time distribution model, a fast charging station space-time pricing model oriented to transformer area balance is obtained; and iteratively solving the time-space pricing model of the fast charging station by using a multi-objective optimization algorithm SPEA2. By adopting the technical scheme of the invention, the problem that the voltage of the terminal power grid node is obviously reduced during peak load is solved, and the voltage supporting capability of the fast-charging electric vehicle is effectively exerted.

A display device and an electronic device are disclosed. The display device includes a substrate, a transistor on the substrate, a scan line connected to the transistor, a first electrode above the scan line, a light-emitting stack above the first electrode, a second electrode above the light-emitting stack, and an auxiliary line located on a different layer from the scan line and connected to the scan line.

The invention discloses a packaging structure corresponding to wafer back power supply of a chip of 2nm and below 2nm. According to the scheme, an adapter plate is arranged on a substrate, and a first chip with the thickness of 2nm and below 2nm is inversely arranged on the basis of the adapter plate, so that smaller packaging height and smaller physical size are realized. Through the vertical metal blocks and the transverse metal blocks, the sectional area of current transmission is increased, the resistance is reduced, and the current transmission efficiency is improved. The vertical metal blocks and the transverse metal blocks serve as conductive channels and also serve as heat conduction paths, the heat conduction and dissipation capacity is effectively improved, and stable operation of the chip is guaranteed. Through the arrangement of the flip first chip, wafer back power supply is realized, the power supply path is shortened, the IR voltage drop is reduced, and the power supply efficiency is improved. And the vertical metal block is flush with the back surface of the first chip, so that the length of a current transmission path is reduced, the energy loss and electromagnetic interference are reduced, the electrical performance is improved, the uniformity of current distribution is ensured, and the resistance is further reduced.

The invention relates to a zero-electrode-distance packed bed electric flocculation oil-water separation device and application. The device is composed of a solar panel, a storage battery, a direct-current power supply, a magnetic stirrer, a reactor, an iron support, a waste aluminum ring-pull can, a conductive metal net, an insulating material lining and an alligator clip. By constructing a cathode with a special structure and a connection mode thereof, the distance between the cathode and the anode of the electric flocculation is infinitely shortened to zero, so that the voltage required by the electric flocculation and the electric flocculation time are reduced, and the effective reduction of energy consumption and the effective removal of chemical oxygen demand (COD) are realized; in addition, the extremely small electrode distance is beneficial to charge transmission and reduction of ohmic drop of an electric flocculation system, and the reaction rate of electric flocculation is improved; the device can be introduced into an electric flocculation wastewater treatment process so as to improve the utilization rate of wastewater resources. The effect of the electric flocculation reaction can be effectively improved, and a new thought is provided for application and development of the electric flocculation process.

This application discloses a driving substrate and a display panel. In this embodiment, the output electrode is used to electrically connect to a light-emitting device. The active layer includes a semiconductor portion, a first conductive portion, and a second conductive portion. The first conductive portion is connected to the side of the semiconductor portion near the output electrode, and the second conductive portion is connected to the side of the semiconductor portion away from the output electrode. The first conductive portion is connected to the output electrode, and the surface resistivity of the first conductive portion is less than that of the second conductive portion. A gate is disposed overlapping the semiconductor portion. An input electrode is connected to the second conductive portion. The input electrode, output electrode, active layer, and gate are used to form a thin-film transistor. In this application embodiment, because the surface resistivity of the first conductive portion is less than that of the second conductive portion, the voltage drop of the active layer near the output electrode is reduced, thereby reducing the influence of hot carriers on the threshold voltage.

Provided are a motor, and a stator and an electric device thereof are provided. The stator includes a stator iron core and a stator winding provided at the stator iron core. The stator iron core has a plurality of winding slots formed in an inner wall thereof. The stator winding includes a conductor inserted in the plurality of winding slots. The stator winding includes a plurality of phase windings, and each of the plurality of phase windings includes a first branch and a second branch.

Stretchable display device. The stretchable display device disclosed herein may include: a lower substrate; a plurality of first substrates, which are arranged on the lower substrate and define a plurality of sub-pixels, a plurality of second substrates, which connect adjacent first substrates among the plurality of first substrates; a plurality of inorganic insulating layers, which are arranged on the plurality of first substrates; an organic insulating layer, which is arranged on the plurality of first substrates in a manner covering the top surface and the side surface of the plurality of inorganic insulating layers; a plurality of first connecting lines, which are arranged on the organic insulating layers on the plurality of first substrates and on the second substrates extending along the first direction among the plurality of second substrates; a plurality of second connecting lines, which are arranged between the plurality of inorganic insulating layers and the organic insulating layers on the plurality of first substrates and on the second substrates extending along the second direction different from the first direction among the plurality of second substrates; and a step relief layer, which is arranged between the plurality of second connecting lines and the plurality of inorganic insulating layers.

The invention provides a light-emitting substrate and a display panel, a driving backboard of the light-emitting substrate is covered with a whole heat dissipation conductive layer, the heat dissipation conductive layer comprises a main body part and an extension part, the main body part is provided with an opening at a position corresponding to a light-emitting device, and the extension part extends into the opening from the main body part and covers at least part of a first electrode. The heat dissipation conductive layer is arranged on the light-emitting device, so that heat generated when the light-emitting device works can be dissipated through the heat dissipation conductive layer, the heat dissipation conductive layer covers the whole surface, the heat dissipation area can be increased, heat dissipation is more uniform, the heat dissipation performance is improved, and the problem that the service life of an existing Micro LED displayer is seriously affected due to the fact that the temperature is high when the existing Micro LED displayer works is solved.

The invention discloses an electrolyte purity maintaining assembly applied to a stainless steel cold acid line, purifying equipment and a using method of the purifying equipment, and aims to solve the problem of high power consumption caused by electrolyte impurity accumulation and circulation dead angles. The device comprises an electrolyte purity maintaining assembly and an electrolyte purifying device. The maintaining assembly comprises a storage tank and a circulating structure arranged in the storage tank; the circulating structure is composed of a liquid outlet cylinder, an impeller, a connecting pipe I and a connecting pipe II, the connecting pipe I and the connecting pipe II are distributed up and down, the impeller is driven by a magnetic coupling driving mechanism to rotate, and tank bottom fluid dead corners and electrolytic mud deposition are eliminated through negative pressure suction. According to the purification equipment, a driving motor is matched with an inner / outer gear ring and a gear set to drive an annular liquid pipe to perform circumferential rotation and axial lifting; the fluid boundary layer on the surface of the filter screen is destroyed by utilizing mechanical micro-amplitude vibration generated by a hemispherical block matching structure and a pulse generation structure formed by a closed ring and a communicating pipe so as to peel off viscous impurities.

This application relates to an electrochemical device and an electronic device. Specifically, this application provides an electrochemical device comprising a negative electrode and an electrolyte. The negative electrode comprises: a negative electrode current collector; a base coating comprising a volume-expanding resin and formed on at least one surface of the negative electrode current collector; and a negative electrode active material layer comprising a negative electrode active material and formed on the base coating; and the electrolyte comprising propyl propionate. This design not only significantly improves the safety performance of the electrochemical device under thermal runaway but also effectively reduces its voltage drop during low-temperature storage.

A power supply control circuit allows power to be supplied to a load from a power supply, such as a sub-battery, for a longer period of time in a case where a main power supply fails. A power supply control circuit (1) is provided with: a first circuit (2) that connects a main battery (52) and a sub-battery (53) via a DC / DC converter (20); a second circuit (3) that connects the main battery (52) and the load (54); and a third circuit (4) that connects the sub-battery (53) and the load (54) via the semiconductor switch (32). When a failure occurs in the main battery (52), the semiconductor switch (32) is turned on to supply power from the sub-battery (53) to the load (54), and a forward direction of a parasitic diode (32a) of the semiconductor switch (32) is a direction from the load (54) to the sub-battery (53). In addition, the DC / DC converter (20) boosts the voltage from the main battery (53), and supplies the boosted voltage to the sub battery (53).

The invention belongs to the field of lithium battery core testing, and discloses a discharging circuit for suppressing a current peak by utilizing the Miller effect of an MOS (Metal Oxide Semiconductor) transistor, which comprises a booster circuit, a rectifying circuit, a filter circuit, a discharging loop and a tested circuit, the booster circuit is used for amplifying the input voltage and outputting the amplified input voltage to the rectifying circuit; the rectifying circuit is used for converting the alternating current signal output by the booster circuit into a positive signal and outputting the positive signal; the filter circuit is used for smoothing and filtering the signal output by the rectifying circuit; and the discharge loop is used for increasing the discharge speed of the tested circuit and inhibiting the current peak generated at the discharge moment based on the Miller effect of the MOS tube. According to the invention, the Miller effect of the MOS tube is utilized to suppress the current peak generated at the moment of discharging, and the output voltage precision and the discharging speed are not influenced, so that the peak current generated by the internal and external capacitors in the discharging loop at the moment of discharging becomes smaller.

The utility model provides a connector for a bond strap. The connector comprises a sheath body, an adaptive sheath, a copper bar, a sheath terminal, a flexible connection structure and a protective shell. A plurality of sheath bodies are connected; the adaptive sheaths are arranged at the two ends of the sheath body, and the adaptive sheaths are connected with the sheath body through elastic hooking structures; the adaptive sheath comprises a plug-in buckle; the copper bars are arranged in the sheath body, so that the fixing stability of the copper bars is ensured; the sheath terminal is connected with the copper bar through an adaptive sheath. The flexible connection structures are connected with the adjacent sheath bodies, and the sheath bodies can be bent according to outer diameters of different wire diameters so as to be suitable for different wire harness main bodies; a flexible connection structure is adopted, the connector can be bent according to the outer diameters of different wire diameters, and the bent connector can be perfectly matched with the wire harness main body. The protective shells are arranged on the two sides of the protective sleeve body. The sheath body is in butt joint with a plurality of plug-in buckles, so that the requirements of different numbers of branch wire harnesses are met, and the co-pressing phenomenon of a plurality of strands of wires can be effectively avoided.