21results about How to "High impedance" patented technology

A headset antenna and a connector for the same are provided. The headset antenna includes an audio signal line, an antenna and a high impedance element in specified application frequency ranges. The audio signal line is adapted for transmitting an audio signal and the antenna is adapted for receiving an RF signal. The high impedance element is disposed on a transmission path of the audio signal and generates a high impedance at a specified frequency band of the RF signal, so that the audio signal line is equivalent to an open circuit and the antenna obtains a better receiving capability.

This invention proposes a lithium-ion battery electrolyte and its application. The electrolyte comprises at least the following components: a fluorinated solvent, including 2,2-difluoroethyl acetate, fluoroethylene carbonate, and 2,2-difluoroethyl ethyl carbonate; a lithium salt, including a first lithium salt comprising lithium hexafluorophosphate; and an additive, including a first additive comprising lithium difluorobis(oxalato)phosphate. The lithium-ion battery electrolyte and its application proposed in this invention can improve the electrolyte's high-voltage resistance and kinetic performance, reduce battery impedance, and enhance the battery's fast-charging performance and high-temperature cycle stability.

The invention discloses a parallel module communication technology based on a serial port bus, and belongs to the technical field of communication. According to the real-time serial port bus, a plurality of independent modules are connected in parallel and communicate and interact with a host, firstly, the modules are made to know own allocated IDs through hardware automatic address allocation, and then the host determines the types and basic information of the modules at the corresponding positions through initial interactive communication; through a polling technology based on time slices, sequential data interaction between a host and a plurality of modules is realized, and meanwhile, high real-time performance is realized through a module preemption communication technology. The system is simple in structure, high in module independence, high in communication real-time performance, clear and easy to use in control logic, and suitable for being used as a short-distance universal parallel application technology of a serial port bus.

The application provides a display panel and a display device; the display panel comprises a test terminal, a first electric connecting piece, a switching part and a second electric connecting piece; the first electric connecting piece comprises electrically connected first and second transmission parts; one end of the second transmission part away from the first transmission part is electrically connected with the test terminal; the switching part is electrically connected with one end of the first transmission part away from the second transmission part; the second electric connecting piece is electrically connected with one end of the switching part away from the first electric connecting piece; the second electric connecting piece and the first electric connecting piece are arranged in different layers; the surface impedance of the first transmission part is greater than that of the second transmission part, which is equivalent to increasing the impedance of the first transmission part, reducing the current when transmitted to the position of the via hole, and avoiding the technical problem of wire breakage caused by explosion of the wires in the switching area.

This invention discloses a fluorine-containing cathode material, its preparation method, and its application. The fluorine-containing cathode material includes a bulk material and a fluorine-containing lithium cobalt compound coated on the bulk material. The chemical formula of the fluorine-containing cathode material is Li. 1+x (Ni (1‑c‑d) Co d Mn c ) 1‑b‑e M b M′ e F y O 2‑y In this invention, the fluoride in the fluorinated coating layer reacts with lithium in the bulk material of the fluorinated cathode material to form a fluorinated cobalt lithium compound. Since the conductivity of the fluorinated compound is very low, coating with the fluorinated cobalt lithium compound significantly increases the impedance of the fluorinated cathode material in the battery, increasing the battery's internal resistance and sacrificing battery capacity. By simultaneously coating with the fluorinated coating layer and replenishing lithium, the conductivity of the fluorinated cathode material is significantly improved, thereby achieving the goal of increasing the capacity of the fluorinated cathode material and improving cycle performance.

The application provides a driving auxiliary source and a power converter, and belongs to the technical field of power electronics. The driving auxiliary source is used for supplying power to a power circuit. The driving auxiliary source comprises: a flyback transformer unit comprising a primary winding and a plurality of secondary windings, the flyback transformer unit being used for outputting the voltage of the primary winding through the plurality of secondary windings after voltage transformation, the plurality of secondary windings comprising M first secondary windings and one second secondary winding, and the interference noise generated by each first switch tube in the power circuit being transmitted to the primary winding through the corresponding first secondary winding; and a flyback control unit connected to a branch in which the primary winding is located and used for controlling the voltage of the primary winding. The parasitic capacitance between the primary winding and at least part of the M first secondary windings is less than a first value, or the impedance on the branch in which the primary winding is located is greater than a second value, so that the ability of the driving auxiliary source to cope with the noise interference of the power circuit is improved, and the stability of the driving auxiliary source is ensured.

The invention relates to the field of lithium iron phosphate, in particular to a composite solid electrolyte synergistically modified lithium iron phosphate positive electrode material and a preparation method thereof. The preparation method is used for solving the problems that existing lithium iron phosphate is poor in electronic conductivity, high in interface impedance and poor and low in interface stability. The lithium iron phosphate positive electrode material synergistically modified by the composite solid electrolyte comprises COF / neodymium-doped lithium titanium aluminum phosphate modified lithium iron phosphate, acetylene carbon black, polyethylene glycol and N-methyl pyrrolidone, according to the preparation method, firstly, lithium iron phosphate is prepared, neodymium ions are doped in the process of preparing lithium titanium aluminum phosphate to serve as a first modification layer, cyanophenothiazine COF is synthesized to serve as a second modification layer, two layers of solid electrolyte are modified on the surface of the lithium iron phosphate to achieve a synergistic effect to form a protective film, and formation of lithium dendrites can be effectively reduced; the interface stability and the cycle performance of the material are remarkably improved, and the safety of the battery is enhanced.

This invention discloses a series resonant wireless charging system with a long cable. The transmitting end assembly includes an AC-DC converter connected to a power source, a transmitting MCU, and an inverter. The transmitting MCU is connected to the AC-DC converter and the inverter via wires. The inverter includes an electric field communication feedback circuit module. The transmitting MCU is connected to the electric field communication feedback circuit module via power control signal lines and data signal lines. The electric field communication feedback circuit module is connected to a feedback electrode plate via wires. The receiving end assembly includes a wireless charging receiving coil, a rectifier, a receiving MCU, and a feedback electrode plate. The rectifier is connected to a battery via wires. The receiving MCU has a control signal line connected to the rectifier via a wire between the rectifier and the battery. The inverter is connected to a transmitting adjustable capacitor via wires. The transmitting adjustable capacitor is connected to an EMI suppression inductor via wires. The EMI suppression inductor is connected to the wireless charging transmitting coil via an AC cable.

The invention discloses a TENG power supply management circuit, and the circuit comprises a TENG module which is used for converting mechanical energy into electric energy; the input end of the Bennet voltage doubling circuit module is electrically connected with the output end of the TENG module, and the Bennet voltage doubling circuit module is used for accumulating charges generated by the TENG module and boosting voltage; the input end of the GDT module is electrically connected with the output end of the Bennet voltage doubling circuit module, and the output end of the GDT module is used for being connected with a load; and the GDT module is configured to be converted from a high impedance state to a low impedance state when voltages at two ends of the GDT module reach breakdown voltages, so that energy stored in the TENG module and the Bennet voltage doubling circuit module is released to a load in a pulse form. The TENG power supply management circuit realizes reliable collection and utilization of tiny electric energy in the environment.

The embodiment of the utility model discloses an antenna assembly and electronic equipment, and a waveguide device is arranged in a protective shell, so that the waveguide device is protected and fixed by using the protective shell. Therefore, the connector is connected with the grounding part through the protective shell, so that the waveguide structure and the protective shell form a first electrical path. The first radiator and the protective shell form a first radiation unit, the second radiator and the protective shell form a second radiation unit, and the protective shell is used for receiving and transmitting electromagnetic signals. Therefore, metal breakpoints are prevented from being formed on the protective shell, and the mechanical strength of the protective shell and the signal gain of the antenna assembly are improved. And meanwhile, the manufacturing cost of the protective shell is reduced. And on the other hand, the impedance of the second radiation unit is improved by utilizing the coupling gap between the grounding part and the second radiation body, so that when the antenna assembly is in different working frequency bands, the waveguide device and the radio frequency circuit still have better impedance characteristics, and the working bandwidth of the antenna assembly is improved.

This invention discloses an electrolyte for use under high cutoff voltage conditions and its preparation method, relating to the field of battery electrolyte materials technology. This electrolyte, through extraction using a reference electrolyte solution, can specifically extract electrochemically active molecular components from anthocyanins, allowing them to preferentially adsorb onto the negatively charged positive electrode surface under high cutoff voltage conditions via electrostatic interactions. This not only interrupts the chain reaction but also directly anchors lattice oxygen, inhibiting lattice oxygen release at its source. It achieves a synergistic effect of a dual protection mechanism of "dynamic removal and static anchoring." Furthermore, high-speed centrifugation avoids increased ion transport impedance. This electrolyte significantly inhibits chain reactions under high cutoff voltage conditions, effectively preventing the formation of excessively thick or high-impedance interface layers, ensuring the battery's capacity and cycle capacity retention under high cutoff voltage conditions, making it suitable for large-scale application in lithium batteries under high cutoff voltage conditions.

This invention provides a non-contact, adjustable alternating magnetic field-eddy current coupled laser shock strengthening device and method for improving hydrogen embrittlement resistance. The device includes a laser shock strengthening unit, a magnetic field generating unit, a driving unit, and a position adjustment unit. The magnetic field generating unit has alternating N and S pole permanent magnets, which are driven to rotate by the driving unit. This induces an alternating magnetic field and closed eddy currents within the metal workpiece. The magnetic field strength, eddy current density, and temperature rise are synergistically controlled by adjusting the air gap and rotation speed. This invention couples a multi-directional alternating electromagnetic field during laser shock, promoting the activation of multiple slip systems and dislocation dispinning, improving the surface microstructure uniformity and residual compressive stress distribution, effectively inhibiting hydrogen intrusion and enrichment, delaying the initiation and propagation of hydrogen-induced cracks, and improving the workpiece's resistance to hydrogen embrittlement. The device has no contact electrodes and is suitable for complex curved surfaces and large-area workpieces.

This invention provides a card edge connector for inserting an electronic card, including an insulating body, conductive terminals, and a terminal protector. The insulating body has an elongated slot and sidewalls on both sides of the slot's elongation. The conductive terminals are arranged on the sidewalls and include a contact portion exposed to the slot, a head extending upward from the contact portion, a connecting portion extending downward from the contact portion, and a solder portion extending from the connecting portion out of the insulating body. The terminal protector shields the heads of the conductive terminals and guides the electronic card into the slot. The conductive terminals have an inner side facing the slot and an outer side opposite to the inner side. Viewed perpendicular to the sidewalls, the contact portion includes an arcuate segment extending outward from the inner side of the connecting portion, and the head includes a retaining segment extending obliquely outward from the arcuate segment. A concave bend is provided at the connection between the arcuate segment and the retaining segment. The concave bend provides clearance space for the terminal protector, which helps to shorten the length of the conductive terminal head, thereby increasing impedance and reducing the impact of the stub effect on high-frequency transmission.

The utility model discloses a high impedance dry type transformer with short circuit protection, comprising a cabinet and a three-phase dry type high impedance transformer arranged in the cabinet, one side of the three-phase dry type high impedance transformer is provided with a breaker input short circuit protection switch, the cabinet wall of the cabinet is provided with a temperature controller and a breaker, and the cabinet wall of the cabinet is provided with a short circuit protection switch. The temperature controller is provided with an overtemperature trip switch, the overtemperature trip switch of the temperature controller is electrically connected with the circuit breaker, and the circuit breaker input short circuit protection switch is electrically connected with the temperature controller and the circuit breaker respectively. According to the three-phase dry-type high-impedance transformer, high-impedance design is combined with the dry-type transformer, so that the impedance of the dry-type transformer is increased, short-circuit current can be limited, impact on a system is reduced, safety and environmental protection performance are improved, and a circuit breaker input short-circuit protection switch is arranged on one side of the three-phase dry-type high-impedance transformer, so that the safety of the dry-type transformer is improved. And over-current and short-circuit protection of the transformer can be realized by combining the temperature controller and the short-circuiting device, the response speed is high, and the protection effect is good.

A continuously variable differential gear comprising: a pair of rotating bevel gears engaged with one another via a pinion gear, each of the bevel gears including a first operating surface; an actuator, opposing ends thereof having a pair of interconnected fluid reservoirs, the actuator comprising a pair of secondary operating surfaces; the pair of rotating gears and the pinion gear being housed within the actuator such that the first operating surfaces of the bevel gears and the secondary operating surfaces of the actuator are cooperatively engaged, wherein relative rotation between the pair of bevel gears imparts a linear motion to the actuator thereby varying the pressure between the pair of interconnected fluid reservoirs to resist the linear motion of the actuator and thereby variably dampen relative motion of the bevel gears to each other.

The application discloses an electrolyte, a positive electrode, a lithium ion battery and a vehicle. The electrolyte comprises a lithium salt, an organic solvent and an additive, and the additive comprises a first additive, the first additive is a dicyano cyclic ether compound, and a structural formula of the dicyano cyclic ether compound is as follows: wherein n, x, y and z are each independent positive integers, and 1<=n<=3, 0<=x<=5, 0<=y<=5 and 0<=z<=5; R1 is selected from one of a hydrogen atom, a halogen atom, a C1-C5 alkyl group, a C2-C5 unsaturated alkyl group, a C6-C 10 aryl group or a C7-C 10 alkylaryl group; and the hydrogen atom in the C1-C5 alkyl group, the C2-C5 unsaturated alkyl group, the C6-C 10 aryl group or the C7-C 10 alkylaryl group can be partially or totally substituted by a substituent. The electrolyte disclosed by the application has a small impedance growth at low temperature, is beneficial to improve the low-temperature discharge performance of the lithium ion battery, can preferentially form a stable interface protection film on the surface of the positive electrode, and improves the battery capacity, cycle life and the like of the battery at high voltage.

The present application relates to a kind of preparation methods of modified graphene oxide polyurethane composite, modified graphene oxide polyurethane composite prepared using the method and its application.The preparation method of the present application includes: graphene oxide is reacted with 4-(trifluoromethoxy) phenyl isocyanate to obtain modified graphene oxide;Toluene group-2,4-diisocyanate end-capped poly (propylene glycol), adipic acid dihydrazide is mixed with four hydrogen bond monomers, to obtain polyurethane base material;Modified graphene oxide is added to polyurethane base material and mixed uniformly, to prepare modified graphene oxide polyurethane material.By the method of the present application, functionalized graphene polymer composite anticorrosive material with self-repairing, strong mechanical properties can be prepared.The preparation method of the present application is simple, and the modified graphene oxide polyurethane composite prepared has higher self-repairing anticorrosive efficiency.

The application discloses an SST solid-state transformer magnetic core and a preparation method thereof. The SST solid-state transformer magnetic core comprises an iron-based nanocrystalline strip substrate, and the front and back surfaces of the iron-based nanocrystalline strip substrate are provided with dense SiO2 insulation coating layers, and the thickness of the SiO2 insulation coating layers is 0.2-1.4 microns. The iron-based nanocrystalline magnetic core has low-frequency magnetic properties, and meanwhile, the full-frequency performance of the magnetic core after cutting can be stably controlled.

The application discloses a kind of lithium salt / organic phosphorus compound double-shell coated graphite materials and preparation method.It presents core-shell structure, the core of composite material is artificial graphite, shell is inorganic lithium salt layer and organic phosphorus compound layer in turn from inside to outside.Lithium salt is deposited on the surface of artificial graphite by electrochemical deposition after adding oxidized artificial graphite into inorganic lithium salt, filtration, carbonization, and inorganic lithium salt coated artificial graphite material is obtained;After adding into organic phosphorus salt compound, it is uniformly dispersed, spray drying, and lithium salt / organic phosphorus compound double-shell coated artificial graphite composite material is obtained.The composite material uses inorganic lithium salt coating to reduce material surface defects, can prevent solvent co-embedding, improve the first efficiency of material, prolong cycle life;And outer layer is coated with organic phosphorus compound, when battery appears thermal runaway, impedance increases, prevents thermal runaway, and improves safety performance.

This invention relates to the field of conductive materials, and more specifically, to an MXene-Ti3C2T x The preparation method, composite material, and application of the conductive agent include the following steps: Ti3AlC2 MAX phase ceramic powder is added to an etching solution and reacted at 0–60°C for 5–48 hours. The mixture is washed with water until neutral, centrifuged, and a slurry is obtained. A polar organic solvent is added to the slurry, and the mixture is ultrasonically treated to obtain a suspension. The suspension is freeze-dried to obtain the conductive agent. This conductive agent utilizes metallic conductive two-dimensional MXene to directly construct a conductive framework, combining the functions of conductive support and interface regulation. The MXene sheets not only provide electron transport but also improve the interfacial compatibility between the silicon anode and the solid electrolyte through their flexibility and surface functional groups, suppressing interfacial cracking and side reactions.

The application belongs to the technical field of cold zinc spraying coating and specifically provides a long-acting corrosion-resistant graphene modified cold zinc spraying coating and a preparation method thereof. The long-acting corrosion-resistant graphene modified cold zinc spraying coating comprises a resin liquid and modified zinc powder dispersed in the resin liquid. The resin liquid comprises water-based polyurethane, graphene, phytic acid cross-linked kaolin sol and water. The modified zinc powder comprises zinc powder and phosphate coated on the surface of the zinc powder. The cold zinc spraying coating prepared by the application has the advantages of high bonding force with a substrate and good corrosion resistance.