51results 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.

The invention relates to the technical field of pressure-sensitive adhesives, in particular to a high-temperature-resistant high-impedance pressure-sensitive adhesive, a supporting film and a preparation method of the supporting film. A styrene-butadiene-styrene block copolymer (SBS) is used as a main body material, an acrylic copolymer with high carboxyl content is grafted in a solvent in a thermal initiation mode, the high-temperature-resistant and high-impedance pressure-sensitive adhesive is obtained after the high-temperature-resistant and high-impedance pressure-sensitive adhesive is compounded with tackifying resin, a curing agent and an antioxidant, and after optical-grade PET is coated with the high-temperature-resistant and high-impedance pressure-sensitive adhesive, the high-temperature-resistant and high-impedance pressure-sensitive adhesive is obtained. According to the novel supporting film, the polarity of the SBS main body material is low, the excellent electrical insulation performance is provided, the supporting film body has the characteristic of high impedance, and therefore the requirement for high impedance of the supporting film in a copper bar friction experiment is met; in addition, after the acrylic copolymer with high carboxyl content is grafted, a large number of crosslinking points can be provided, and the overall crosslinking degree is greatly increased after thermocuring, so that the high-temperature modulus of the adhesive layer is improved, and the adhesive layer is endowed with the characteristic of high-temperature deformation resistance.

The invention discloses an optical module which comprises a circuit board, and the circuit board comprises a first metal surface layer, a second metal surface layer and a first metal intermediate layer. The first metal surface layer is provided with golden fingers, the golden fingers are provided with elastic sheets, the golden fingers comprise high-frequency signal golden fingers, and a gap is formed in one side of each golden finger. The first metal middle layer is located below the first metal surface layer, and a first insulation supporting layer is arranged between the first metal middle layer and the first metal surface layer. The first metal intermediate layer in the projection area of the high-frequency signal golden finger does not have the metal layer so as to form a hollow area. The first insulating supporting layer in a projection area on one side of the high-frequency signal golden finger is hollowed out to form a first groove. According to the invention, the hollow area and the first groove increase the impedance of the high-frequency signal golden finger, and reduce the impedance mutation of the high-frequency signal golden finger caused by the connection of the elastic sheet and the high-frequency signal golden finger, thereby guaranteeing the impedance continuity of the high-frequency signal golden finger, and guaranteeing the transmission quality of a high-frequency signal.

The lithium ion secondary battery comprises a positive plate, a negative plate, electrolyte and a diaphragm, the negative plate comprises a negative current collector and a negative active layer arranged on the negative current collector, the negative active layer comprises a first active layer and a second active layer which are arranged on the surface of the negative current collector, and the second active layer is arranged on the surface, far away from the negative current collector, of the first active layer; the first active layer comprises a first negative electrode active material, and the first negative electrode active material comprises first graphite; the second active layer comprises a second negative electrode active material, and the second negative electrode active material comprises silicon carbon; the electrolyte comprises 1, 3, 6-hexane trinitrile, the mass content of the 1, 3, 6-hexane trinitrile in the electrolyte is 0.5 wt%-10wt%, and the battery provided by the invention has a relatively high cycle capacity retention ratio.

The invention discloses a low-temperature electrolyte for a laminated soft-package lithium ion battery, the lithium ion battery and a preparation method of the lithium ion battery. Comprising the following components: 4%-6% of propylene carbonate, 9%-11% of diethyl carbonate, 30%-32% of methyl ethyl carbonate, 24%-26% of ethylene carbonate, 9%-11% of ethyl propionate, 14%-16% of electrolyte salt and 3.6%-4.0% of an additive, according to the low-temperature electrolyte and the lithium ion battery, the solvent and the additive of the electrolyte are optimally combined, so that the obtained electrolyte has the characteristics of high conductivity and low impedance at low temperature, the low-temperature charge-discharge performance of the lithium ion battery can be remarkably improved, in addition, the obtained low-temperature electrolyte and the lithium ion battery have wide application prospects, and the application prospect is wide. And the method is especially suitable for the field with high low-temperature performance requirements.

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 utility model relates to the technical field of intelligent switch cabinets, and discloses an intelligent switch cabinet loop current protection device, which comprises a box body, the bottom of the inner surface of the box body is fixedly connected with an insulating plate, when the current needs to be controlled, for example, the load current is too large, the operation of a first motor is controlled, and the current is read through an electricity measuring module; under the assistance of a fixing plate and a fixing shaft, a first motor drives a rotating rod to rotate, the rotating rod drives a carbon brush head to rotate, at the moment, the carbon brush head rotates at the top of a conductive coil, and due to the fact that resistance values of all areas of the conductive coil are different, the current can be controlled; therefore, the impedance of the power supply line can be automatically increased to reduce the loop current to ensure the normal operation of the device, if the load current is too small, the impedance of the power supply line can be automatically reduced to increase the loop current to ensure the normal operation of the device under the action of the carbon brush head, and the device has the effects of controlling the current and ensuring the normal operation of the device.

The invention discloses an air medium-filled suspended slot line structure, which is an air medium-filled suspended slot line structure based on an MISL platform and is formed by stacking a plurality of layers of metal plates, a self-packaging structure is formed, a slot line structure of a main circuit is arranged on one layer of metal plate inside, and the other layer of metal plate is arranged on the other layer of metal plate inside. And hollow cavities filled with air are formed in the metal plates above and below the slot line structure of the main circuit through partial cutting. According to the invention, a multi-layer metal plate stacking structure is adopted to form a multi-layer self-packaging structure, etching can be carried out on the internal metal plates to form a slot structure, and mediums in the slot structure and above and below the metal plates where the slot structure is located are air, so that dielectric loss caused by a slot line structure designed based on a traditional PCB is thoroughly eliminated, and the reliability of the slot line structure is improved. And therefore, relatively low loss can be realized. Due to the adoption of a self-packaging structure, an electric field is mainly distributed in air in the packaging structure, so that the radiation loss of the slot line can be greatly reduced.

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 invention relates to a biosensor based on a tethered phospholipid bilayer membrane as well as a preparation method and application of the biosensor, and belongs to the technical field of biosensing. The biosensor comprises a solid substrate plated with a gold film on the surface, and a phase-separated hydrophilic and hydrophobic mixed single layer, and a cholesterol molecule Chol-doped single-layer and double-layer alternate active lipid molecule layer. The biosensor based on the tethered phospholipid bilayer membrane has the advantages of high impedance, stable property, mass production and the like. And the method is suitable for various characterization technologies such as electrochemistry, patch clamp, in-situ spectrum and the like. According to the preparation method of the biosensor based on the tethered phospholipid double-layer membrane, the reproducibility of the preparation process is good, the operation process is simple, batch production can be achieved, and the obtained biosensor can be widely applied to research of membrane protein or ion channel protein.

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 present invention belongs to the field of chip testing technology, and discloses a chip testing device. The chip testing device includes a test seat, a pressure cover, a pressure head mechanism and a cleaning mechanism. The test seat has a clamping groove, and the clamping groove is used to install the tested chip; the pressure cover is rotatably connected to the test seat; the pressure head mechanism is rotatably arranged on the pressure cover, and the pressure head mechanism can abut against the top surface of the tested chip. The pressure head mechanism is rotated, and the pressure head mechanism can squeeze the tested chip so that the probe on the test seat pierces the solder ball on the tested chip; the cleaning mechanism is arranged on the test seat, and the cleaning mechanism can clean the probe. The chip testing device provided by the present invention is provided with a cleaning mechanism, and the cleaning mechanism cleans the probe to prevent excessive tin slag from adhering to the probe, making the impedance of the probe too large, thereby improving the test stability.

The utility model discloses an anti-interference communication port module and an electric appliance device, comprising a first connection port, a second connection port, a first switch assembly and a second switch assembly, the first connection port is provided with a first pin, and the second connection port is provided with a second pin. The first connecting port and the second connecting port can be connected with each other, the first pin and the second pin are in conductive contact to realize signal transmission, the input end of the first switch assembly is connected with first equipment, and the output end of the first switch assembly is connected with the first pin; the first switch assembly can form and output a first level signal to the first pin according to a first signal output by first equipment, the input end of the second switch assembly is connected with the second pin, the output end of the second switch assembly is connected with second equipment, and the second switch assembly can form and output a second signal according to the first level signal; the design has good anti-impact and anti-interference capabilities, and the signal transmission performance is stable and reliable.

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.

Provided are an acoustic matching layer material containing a curing reaction product obtained by reacting an epoxy resin (A) having an epoxy equivalent weight of 140 or less with at least one of a curing agent (B-1) which is a monomer or a curing catalyst (B-2), and metal particles (C) having a density of 4.5 g / cm3 or more and less than 10 g / cm3 at 20°C, in which a content of particles (D) having a density of less than 4.5 g / cm3 at 20°C is less than 5% by mass; an acoustic matching sheet; a composition for an acoustic matching layer material; an acoustic wave probe; an acoustic wave measurement apparatus; and a manufacturing method of an acoustic wave probe.

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 invention belongs to the technical field of lithium battery electrolyte, and particularly relates to ultralow-temperature electrolyte suitable for a ternary high-specific-energy soft package lithium ion battery system. The invention provides an ultralow-temperature electrolyte suitable for a ternary high-specific-energy soft package lithium ion battery system. The ultralow-temperature electrolyte comprises a mixed organic solvent, a lithium salt and a functional additive, the mixed organic solvent contains linear carbonic ester with a low freezing point and linear carboxylic ester with a low freezing point; the mixed organic solvent also contains at least one of fluorinated carbonate and fluorinated carboxylic ester. Linear carbonic ester and linear carboxylic ester with low freezing points are adopted as solvents, carbonic ester solvents with high freezing points are replaced or partially replaced, the viscosity of the electrolyte is reduced, the Li < + > desolvation process is adjusted by adding fluorinated carbonic ester and fluorinated carboxylic ester, the oxidation resistance of the electrolyte is improved, and the SEI stability is considered. In addition, the low-temperature performance is improved in the aspects of improving the lithium ion conductivity, constructing a stable SEI film with high ion conductivity, accelerating interface reaction kinetics and the like.

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.

The invention discloses a nano ZIF-8 modified polyurethane film coating and a preparation method thereof, and belongs to the field of high-performance composite film coatings. In the preparation method disclosed by the invention, the growth of ZIF-8 particles is limited by utilizing a low-temperature environment, the dispersion degree of ZIF-8 in PU is improved, the mechanical property of the composite coating is improved by utilizing the mechanical property of an inorganic substance shown by MOF, the crosslinking effect with the PU coating is enhanced by virtue of an organic functional group in the MOF, the combination of the MOF in the PU film coating is improved, and a long-range ordered structure of PU is blocked; according to the method, the use of large-scale instruments and equipment such as electrostatic spinning is avoided, and the method is simple, easy to implement and low in energy consumption. The problems that an existing modified PU film coating is poor in mechanical performance, complex in preparation method and the like in practical application are solved.

The invention provides a PEMEC five-in-one electrode and a preparation method of the PEMEC five-in-one electrode. The method comprises the following steps: performing metal electroplating treatment on a titanium mesh to obtain a catalyst layer framework; preparing anode catalyst layer ink and cathode catalyst layer ink; printing ink is sprayed to one side of the catalyst layer framework through ultrasonic spraying, and an anode catalyst layer and a cathode catalyst layer are formed respectively; covering the surface of the catalyst layer with a Nafion solution to form a Nafion layer; standing and molding to obtain a negative electrode and a positive electrode; and respectively compounding the negative electrode and the positive electrode to the two sides of the proton exchange membrane subjected to hot pressing treatment through hot pressing to obtain the PEMEC five-in-one electrode. According to the preparation method, the PTE electrode is prepared by taking the titanium mesh as a framework in a non-uniform loading manner, and the five-in-one electrode is obtained by combining a proton exchange membrane, so that the problem of waste of noble metal can be solved, and the prepared electrode can be applied to a PEM electrolytic bath and can also be applied to reaction devices with the same structure, such as a PEM fuel cell.

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.

The invention relates to an EMC (Electro Magnetic Compatibility) device capable of improving inductance value, which comprises an upper cover plate, a P-pole flat winding assembly, an N-pole flat winding assembly, a magnetic body and a base, and is characterized in that the P-pole flat winding assembly, the N-pole flat winding assembly and the magnetic body are arranged on the base; the upper cover plate is connected with the base, an inner cavity used for containing the P-pole flat winding assembly, the N-pole flat winding assembly and the magnetic body is formed between the upper cover plate and the base, the P-pole flat winding assembly comprises a first multi-turn copper bar coil, a P-pole input terminal and a P-pole output terminal, the P-pole input terminal and the P-pole output terminal are arranged at the two ends of the first multi-turn copper bar coil respectively, and the N-pole flat winding assembly comprises a second multi-turn copper bar coil. The N-pole input terminal and the N-pole output terminal are arranged at the two ends of the second multi-turn copper bar coil respectively, and the magnetic body penetrates through the first multi-turn copper bar coil and the second multi-turn copper bar coil at the same time. Compared with the prior art, the filter has the advantages of improving the filtering effect, reducing the size and the like.

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.