65results about How to "No risk of short circuit" patented technology

The invention discloses a fingerprint sensor encapsulation method. The fingerprint sensor encapsulation method includes the following steps that: a substrate with a groove is manufactured, and at least one metal bar which adjoins or is adjacent to the groove is manufactured on the surface of the substrate; a fingerprint sensor is fixed in the groove, and pins of the fingerprint sensor are connected onto gold finger pads on the surface of the substrate through leads based on lead bonding; lead bonding portions on the surface of the substrate are encapsulated with an insulation material, wherein the lead bonding portions include the gold finger pads, the pins of the fingerprint sensor and the leads. The embodiment of the invention also provides a corresponding fingerprint sensor encapsulation structure. According to the technical scheme of the invention, a metal frame is not required to be installed in a surface-mount manner, and therefore, production process is simplified, and the encapsulation structure is simpler and more reliable; and the gold finger pads and the metal bars are formed through etching when the substrate is machined, and therefore, risks of short-circuiting can be avoided, and reliability can be greatly improved.

The invention discloses a vehicle-mounted wireless heating device which comprises a vehicle-mounted wireless charging cup seat and a vehicle-mounted wireless charging cup. The vehicle-mounted wireless charging cup seat comprises a base, a primary side induction coil, a single chip computer controlled circuit, a temperature sensor, a pressure sensor, an indicating light and a fixed support. The vehicle-mounted charging cup comprises a cup with a sleeve, a cup cover with radiating holes, a sub side induction coil and a heater. The vehicle-mounted cup seat is powered by a storage battery, the cup is placed on the cup seat through the fixed support, energy is transmitted to a sub side receiving coil in an inductive coupling mode, the sub side receiving coil transmits the energy to the heater to heat, and the circuit is cut off automatically when the water is heated to a preset temperature threshold. Due to the fact that the water in the cup is heated in an inductive coupling mode, the efficiency of energy transmission is high. Due to the fact that the cup is not connected with the power supply directly, the risk of short circuit is avoided and the heating device is safe to use. Due to the fact that the fixed support and the cup cover are disposed on the heating device, water does not overflow when the vehicle runs, and the heating device is convenient to use.

The invention relates to a motor drive system, in particular to an impedance type five bridge-arm converter dual-motor drive system and a control method thereof. The system consists of a five bridge-arm converter, an impedance link, a power supply side direct current bus power switching device, a power supply and a permanent magnet alternating current motor; and by controlling the five bridge-arm converter to drive two motors by adopting a simple and easily implemented decoupling algorithm, and by controlling the voltage of a direct current bus of the converter through the cooperation of the power supply side direct current bus power switching device, the impedance link and a power switching device of the five bridge-arm converter, the system can realize a speed expansion operation at a speed higher than a rated speed of the motors, and can also realize an energy feedback process from the motors to a power supply. The system has the advantages that: no short-circuit risk of 'direct connection' between two power switching devices of the same bridge arm of the converter exists; the cost of the converter is saved by using one converter independently to drive two motors; and the voltage of a power supply side direct current bus can be controllably raised, which contributes to solving the problem of 'weak magnetic speed expansion' of the permanent magnet alternating current motor.

Provided is a lithium secondary battery with three-dimensional network porous bodies as current collectors in which the internal resistance does not increase even after repeated charging and discharging. A lithium secondary battery including a positive electrode and a negative electrode each having as a current collector a three-dimensional network porous body, the positive electrode and the negative electrode being formed by filling at least an active material into pores of the three-dimensional network porous bodies, wherein the three-dimensional network porous body for the positive electrode is a three-dimensional network aluminum porous body having a hardness of 1.2 GPa or less, and the three-dimensional network porous body for the negative electrode is a three-dimensional network copper porous body having a hardness of 2.6 GPa or less.

The invention provides an integrated energy supply product. The product integrates a III-V thin film solar battery and an all-solid-state thin film lithium battery; the positive electrode of the solarbattery is connected with the positive electrode current collector of the lithium battery; the negative electrode of the solar battery is connected with the current collector of the negative electrode Li of the lithium battery; and the positive electrode current collector and negative electrode current collector of the lithium battery are connected with a load through wires. The invention also provides a preparation method of the energy supply product and a device for preparing the energy supply product. The device comprises a glove box; and a magnetron sputtering coating device, a vacuum evaporation device and a hot pressing device are integrated in the glove box. According to the energy supply product of the invention, the III-V thin film solar battery is adopted; the III-V thin film solar battery is provided with a light-weight flexible substrate; the overall thickness of the solar battery is smaller than 200 micrometers; the weight-to-area ratio of the solar battery is 300 g / m<2>and is much smaller than the weight-area ratio of a crystalline silicon battery; the all-solid-state thin film lithium battery is adopted, and is provided with a flexible substrate; the thickness of the entire energy supply product is smaller than 1 mm; and the energy supply product is flexible, light-weight and easy to carry.

A circuit board (1) is provided comprising a plurality of insulating layers, at least one ground layer and at least one layer comprising signal traces. The circuit board comprises at least a first conductive via (17) and a second conductive via (17). The first conductive via and the second conductive via penetrate through at least a first insulating layer of the plurality of insulating layers and are connected to a signal trace. The first conductive via and the second conductive via are arranged adjacent each other. At least in the first insulating layer the first conductive via and the second conductive via are separated in a first direction of separation (R) by a first adjustment portion comprising a dielectric material property different from the first insulating layer.

The invention discloses an electric connector and a manufacturing method thereof. The method is characterized by comprising the following steps: arranging a baffle frame at the outer periphery of each terminal on an electric conduction plate after the terminals are fixed on the whole electric conduction plate; pouring liquids or pasty insulation materials in a space defined by the electric conduction plate and the baffle frame; and finally removing the redundant part on the electric conduction plate, so that the electric conduction plate forms a plurality of isolated electric conduction blocks which are in one-to-one correspondence with the terminals. Through the manufacturing method, not only can the insertion force problem brought by the assembling method be avoided, but also the problem of bending difficulty of a material strip brought by the mode of insert-molding can be solved; the intensity required by the electric connector can be ensured by the electric conduction plate selected in the manufacturing method, at the same time, the thickness can be reduced, thus the thickness of the manufactured electric connector is smaller, which accords with the development trend of an ultrathin electric connector, and the mode that all the terminals are fixed into a mutually-conducted integrity and the integrity is then separated into isolated individuals ensures that short circuit hazard can not happen among the terminals.

The invention discloses a test fixture and test equipment for a connector interface. The test fixture comprises a connector matching plug, a circuit board and a hybrid test interface. The connector matching plug is provided with a probe, and can be connected with the connector interface in an inserted manner through the probe. Signal wires in one-to-one connection with probes corresponding to to-be-tested pins of the connector interface are laid on the circuit board, and test signals of the to-be-tested pins can be led out through the signal wires. The circuit board is also provided with hybrid test interfaces which are connected with the signal wires one by one; the hybrid test interfaces can be connected with different test devices in a one-to-one matching manner through different test interfaces of the hybrid test interfaces, each test device can directly detect a test signal for detection, the test process is relatively simple, the test difficulty is relatively low especially for aconnector interface with a very small distance between pins, and a short-circuit risk does not exist; moreover, the test fixture provided by the invention can be applied to different test devices fortesting, and is relatively wide in application.

A surface acoustic wave device which hardly causes short- circuit between mounting electrodes in mounting of an elastic surface wave element, even devised to be miniaturized, and facilitates checking the formation of fillets of a conductive bond in mounting, thus reducing the cost, with the element being mounted on a board and sealed with a resin-sealing layer. The surface acoustic wave device 1 has a surface acoustic wave element 3, which is mounted on a multilayer board 2 by the face down method using bumps 19a, 19b and sealed with a resin-sealing layer 4. Electrode lands 16, 17 on the upper side 2a of the multilayer board 2 connected to the bumps 19a, 19b are connected to inner electrodes 22, 23 via electrodes 20a, 20b, and the inner electrodes 22, 23 are electrically connected to mounting electrodes 24, 25 on the lower side of the board 2 and to end-face wiring electrodes 26, 27.

The invention provides a plastic molding power inductance element and a manufacturing method thereof. The plastic molding power inductance element comprises a conductor, a magnetic core and a magneticplastic packaging layer, wherein the conductor comprises a base part subjected to insulation treatment, a side edge enclosing part subjected to insulation treatment and an electrode part which are integrally formed, the base part and the side edge enclosing part are assembled together with the magnetic core in a gapless fit manner, and the magnetic plastic packaging layer wraps the conductor andthe magnetic core in a gapless manner. According to the invention, the method is used for manufacturing the plastic molding power inductance element; the plastic packaging layer completely wraps the prefabricated magnetic core and the part, except the electrodes, of the conductor and is of an integrally-formed structure, so that leakage flux is small; and when the equivalent magnetic conductivityreaches more than 60, the equivalent saturation magnetic flux density can reach more than 0.55 T, the space utilization rate is high, and the design of a miniaturized inductor is facilitated.

The invention relates to the technical field of field distribution detection, on-line debugging and fault diagnosis of a Ka frequency band circuit, in particular to a magnetic coupling near field probe. A Ka frequency band base plate integrated magnetic coupling near field probe comprises a first circuit base plate, a second circuit base plate, a first metal structure element, a second metal structure element and a connector. The probe has the advantages that the magnetic coupling probe based on double-layer metal medium base plates is adopted, a PCB (printed circuit board) process is adopted for being matched with simple machining process manufacturing, the manufacturing is simple, the cost is low, the size is small, and the transmission performance is good. The probe does not need plastic sleeve protection, the direct handheld operation can be realized, a special test frame is not needed, and the short circuit danger is avoided. The probe is suitable for being used for Ka frequency band circuit magnetic field measurement, the demand on the space is small, the adaptability is high, and the data measurement is more stable.

The invention discloses an intelligent temperature-control mattress. The intelligent temperature-control mattress comprises a mattress body and a main engine, wherein the mattress body is provided with a ventilation layer, a lining layer, a temperature control layer, a filling layer and an anti-slip layer in sequence from top to bottom; a water circulation pipe is laid in the temperature control layer; the temperature control layer is provided with a sleep monitor and a first temperature sensor; the main engine comprises a water tank assembly, a control panel, a heat dissipation opening, a water feeding opening and a liquid crystal display screen arranged on the control panel; the water tank assembly comprises a water tank, a semiconductor cooler, a fan, a water feeding opening of a watertank, a second temperature sensor, a water pump, a self-operated electric control temperature adjusting valve and a stirring part. The intelligent temperature-control mattress disclosed by the invention has the advantages that the semiconductor cooler can meet the requirements of heating and cooling the mattress at the same time, and is simple in structure and good in safety.

Provided is a lithium secondary battery using three-dimensional, mesh-like porous bodies as collectors, and wherein internal resistance does not increase even after repeated charging and discharging. The lithium secondary battery, wherein the positive electrode and negative electrode use the three-dimensional, mesh-like porous bodies as collectors and are configured by at least an active substance being filled into the pores of the three-dimensional, mesh-like porous bodies, is characterized by the three-dimensional, mesh-like porous body for the positive electrode being a three-dimensional, mesh-like aluminum porous body having a hardness of no more than 1.2 GPa, and the three-dimensional, mesh-like porous body for the negative electrode being a three-dimensional, mesh-like copper porous body having a hardness of no more than 2.6 GPa.

The invention provides an LED display screen and a preparation method thereof. The LED display screen comprises a printed circuit board and multiple LED lamp beads fixed on the printed circuit board and in array distribution; a gap is reserved between adjacent LED lamp beads; and villi are arranged in the gap. By flocking in the gap between adjacent LED lamp beads of a lamp bead circuit board of asmall-space LED display screen to replace traditional mask, the contrast ratio of the LED display screen is increased, the production cost is lowered, and the using reliability of the LED display screen is improved.

The invention provides a novel self-rotating large-current MAG (Magnetic) welding composite nozzle welding gun for removing slag and a slag removing method thereof. The invention aims at solving the slag removal difficulty of the welding gun in large-current MAG welding process and further optimizing a nozzle structure. The invention mainly comprises a welding gun structure which can remove welding spattering slag in a composite nozzle in a self-rotating way as well as a self-rotating slag-removing method of the welding gun. The welding gun structure and the self-rotating slag-removing method are suitable for thickwire large-current MAG welding.

The invention provides a non-contact type cable voltage measuring sensor, comprising: a housing, an insulating member, a detecting electrode, an electric field measuring module, a signal demodulationand communication circuit and an aviation socket, wherein the insulating member is fixed at a groove in the housing; the detecting electrode is fixed on the upper surface of the insulating member, istightly connected with the insulating member, and is used for generating induced charge; the electric field measuring module is fixed inside the housing, is electrically connected with the detecting electrode through an electrode lead, and is used for measuring the electric field strength; the signal demodulation and communication circuit is fixed inside the housing, is electrically connected withthe electric field measuring module through a wire, and is used for analyzing and calculating electric field signals and converting the same into voltage signals; the aviation socket is mounted on the side wall of the housing, is electrically connected with the signal demodulation and communication circuit through wire, and is used for providing a power supply for the electric field measuring module and the signal demodulation and communication circuit and providing an interface for signal output.

The invention discloses a cooling power source control system for exciting power cabinets. The cooling power source control system for the exciting power cabinets comprises the power cabinets, an excitation regulator control cabinet and power supplies and the power supplies comprise the working power supply and the emergency power supply; each power cabinet comprises a plurality of working fans, a plurality of standby fans and a power-down alarming circuit; the working power supply is connected with the working fans after being connected with a voltage relay K20, a breaker Q11 and a relay K11 and the standby power supply is connected with the standby fans after being connected with a voltage relay K21, a breaker Q12 and a relay K12; the power-down alarming circuit is connected with the excitation regulator control cabinet. The cooling power source control system for the exciting power cabinets guarantees that when the main power supply breaks down, the power supply of the cooling fan is rapidly switched to the emergency power supply or the working fan is switched to one standby fan for work, frequent switching caused by shaking of the power supplies is avoided, and the hidden danger that due to instability of the power supplies, the working power supply and the emergency power supply compete with each other in the process of frequent switching of the working power supply and the emergency power supply and a short circuit of the working power supply and the emergency power supply is generated is eradicated.

The invention discloses a metal-graphite medium-temperature energy storage battery and a preparation method thereof, and the metal-graphite medium-temperature energy storage battery is characterized in that the metal-graphite medium-temperature energy storage battery comprises a positive electrode, a negative electrode and an electrolyte; a gasket is arranged between the positive electrode and thenegative electrode; the electrolyte is arranged in the gasket, and the positive electrode is a graphite material; the electrolyte is YAlCl4 of saturated YCl, wherein Y is Li, Na or K; the negative electrode is an X|XCl2 solid-phase composite electrode, wherein X is a metal with the electronegativity being higher than the electronegativity of Al. The operation temperature of the battery is 100-200DEG C, the cycle life exceeds 10000 times, and the balance voltage is about 1-1.7 V.

The invention provides an application of a mixture of a carbon material and an ionic bromide in a battery positive electrode active material of an aqueous electrolyte. The invention also provides an aqueous zinc-bromine double-ion battery which comprises a positive electrode active material, a negative electrode active material and an electrolyte, wherein the positive electrode active material comprises a mixture of a carbon material and an ionic bromide. The electrolyte comprises a saturated ZnCl2 aqueous solution. The battery provided by the invention has relatively long cycle life and operation stability. The deposition and dissolution processes of the metal Zn negative electrode active material in the saturated ZnCl2 hydrate adopted by the invention are very efficient and reversible, and dendritic crystal growth risks are avoided, and therefore the negative electrode side has good operation stability. The battery disclosed by the invention is high in safety and environment-friendly. The battery disclosed by the invention is low in cost and relatively high in energy density.

The invention discloses a device that can be combined into a web winder (1) to separate a web. A cutting section (106) of a separating section (100) extends over the width of the web and is fixedly orvibratingly driven relative to the axis of rotation of a contact roller (8), and a holding section (130, 140) is rotatably arranged about the axis of rotation. An operating section (102, 104, 105) places the cutting section in the retaining section, whereby the cutting section is not in contact with the web. The cutting section is moved across the axis of rotation of the device such that the cutting segment squeezes the web for separation. A sensor system (160) is used to detect at least one state of the separation section. The web winder winds the web onto the winding shaft by means of a contact roll and a pressing element. The pressing element presses the winding shaft against the contact roller so that the web is wound on the winding shaft around the circumference of the contact roller. The winder uses the device to separate the web and monitor the position of the cutting section. The invention also relates to a method for operating a winder.

According to the on-missile ignition circuit and method for the underwater missile, power supply starting of a lithium battery can be achieved, a three-section type ignition protection strategy is adopted to guarantee the ignition safety of an engine, and the three-section type ignition protection strategy is adopted to guarantee the ignition safety of the engine. The bare drain end of the control line does not cause the risk of short circuit. After power supply of the lithium battery is started through the relay, the voltage of the activation + and the voltage of the activation-are cancelled, due to the attribute of the relay, under the condition that the two terminals of the activation + and the activation-do not supply power, the two terminals are not electrically connected with an internal circuit, and the risk of short circuit cannot be caused when the two terminals are placed in a water environment; the mistaken ignition phenomenon of the engine can be prevented. Due to the fact that a three-section type ignition protection strategy is adopted, that is, the MCU is powered on firstly, then the ignition switch circuit is started through the MCU, and then the ignition output protection circuit is started, the engine can be started for ignition, and the ignition safety is guaranteed.

The invention relates to a switching device (18) and to a method for terminating a braking process of a three-phase AC motor (1). In order to reduce the waiting time between the end of a braking process of an AC motor and possible restarting of the motor in the case of the AC motor (1), the invention proposes that the braking process of the AC motor (1) is performed by means of a first and second thyristor (5, 6), wherein, during the braking process of the AC motor (1), in a first step the first thyristor (5) is actuated in such a way that a braking current (20) is fed to the AC motor (1), and therefore a torque which brakes the AC motor (1) is produced, and in a second step the second thyristor (6) is actuated in such a way that, when the first thyristor (5) is quenched, the braking current (20) is taken on by the second thyristor (6) and the braking torque is maintained, wherein the two steps are repeated during the braking process, wherein the second step is suppressed during the braking process after a last actuation of the first thyristor (5).

The invention discloses a gas medium based temperature-controlled and voltage-controlled lithium battery formation device, which comprises a gas container, a sealing system, a gas supply system, a temperature and pressure control system and a power system. By using gas as a flowing medium, the temperature-controlled and voltage-controlled lithium battery formation device can avoid pollution and distortion of lithium batteries, has no risk of short circuit, and can ensure uniform pressure inside lithium batteries in the process of formation and improve the performance of lithium batteries. Because various non-corrosive gases can be used, the device has good convenience. In addition, the functions of electrochemical detection and package leak detection can be added during formation.

The invention discloses an ultra-thin dot matrix display device and a production method thereof. The ultra-thin dot matrix display device comprises a PCB (Printed Circuit Board), an SMD (Surface Mount Device) LED (Light Emitting Diode) and a display cover shell, wherein the surface of the display cover shell is provided with uniform light pieces; the SMD LED is pasted on the PCB; and the display cover shell is fixedly connected with the PCB. The production method of the ultra-thin dot matrix display device comprises performing wiring on a control circuit and a dot matrix display LED circuit which are arranged on the PCB; pasting the SMD LED at a corresponding position on the PCB; buckling the display cover shell at a corresponding position on the PCB; and performing fixation and connection. According to the ultra-thin dot matrix display device and the production method of the ultra-thin dot matrix display device, the thickness of the ultra-thin dot matrix display device can be reduced to below 3mm; the production process is simple; the working efficiency is high; the production costs are low; the quality of products is stable and reliable; and particularly all components which are arranged on the PCB are capable of achieving single sided pasting without the need for insulation protection processing and capable of being directly pasted on a base board of a call box for usage.

The invention provides a switch, an on-load phase-change switch and an online phase-change control device. The switch comprises a first moving contact assembly, a second moving contact assembly, a first slide slot, a second slide slot, a first main contact group, a second main contact group, a first auxiliary contact group and a second auxiliary contact group; the first moving contact assembly and the second moving contact assembly are respectively arranged in the first slide slot and the second slide slot in a slide mode; the first moving contact assembly and the second moving contact assembly respectively control the switch-on or the switch-off of the contact groups distributed at two sides of the first slide slot and the second slide slot through sliding in the first slide slot and the second slide slot. The switch, the on-load phase-change switch and the online phase-change control device provided by the invention are advantaged by long service life, stable performance and successful on-load phase-change. Failed on-load phase-change resulted from load resistance, capacitance and sensibility changes of power electronic instruments such as thyristors is avoided by using a mechanical structure.

The invention relates to a heating container (2) for a transportable device (1) intended for reheating food, said heating container (2) comprising a base (3) and a side wall (6) extending up from the base (3). The base (3) includes an inner surface (4) intended to receive food and an outer surface (5) provided with at least two screen-printed resistive tracks (7a, 7b), namely a first screen-printed resistive track (7a) and a second screen-printed resistive track (7b), each screen-printed resistive track (7a, 7b) having two connection ends (9a, 9b, 9c, 9d) which are each connected to an electrical contact pad (8a, 8b, 8c, 8d) used to supply said track with power. According to the invention, the screen-printed resistive tracks (7a, 7b) are stacked on top of one another and separated by an electrically insulating layer (10).

The invention discloses a probe package structure of a human body pressure measuring sensor. The probe package structure comprises a wire, a protection tube, a micro PCB (printed circuit board), a pressure chip and a transition wire, wherein the wire is powered on by the pressure chip and is used for signal transmission; the protection tube is provided with a groove, one end of the protection tube is in sealing communication with a plastic conduit, and the other end is a closed end; the micro PCB is placed in the groove, and a signal output end of the micro PCB is connected with the wire; the pressure chip is placed in the groove, and a sensing surface of the pressure chip is perpendicular to the opening direction of the groove; the transition wire is connected with the pressure chip and the micro PCB; a gap between the pressure chip and the protection tube is filled with protective glue; the surface of the pressure chip is filled with the protective glue; and a low stress medium is filled between the pressure chip and the micro PCB. The chip in the invention is minimally subjected to external stress, thereby ensuring minimum fluctuation of the output value of a packaged sensor and minimum time drift, avoiding the risk of short circuit, improving the stability of test value of the pressure chip, and thus effectively improving the accuracy of pressure monitoring.

The invention aims at providing a safe electric kettle with high safety. The safe electric kettle includes a base and a kettle body, and the top face of the base and the bottom face of the kettle bodyare provided with mutually matched power interfaces; the safe electric kettle is characterized in that the bottom of the kettle body is provided with a groove surrounding the kettle body, and an opening of the groove is upward. When water drops exist on the kettle body due to water pouring or vapor coagulating, under the effect of gravity, the water drops can flow downwards into the groove alongthe kettle body and then are stored in the groove, therefore, the water drops cannot continue to flow downwards to the bottom face of the kettle body and the top face of the base, and in this way, thebottom face of the kettle body and the top face of the base can maintain dry, so that risks of short circuits resulting from water do not exist at the power interfaces. The safe electric kettle solves not only potential safety hazards caused by vapor coagulating but also the water overflowing problem of the kettle body during water pouring, and therefore the safe electric kettle is safer to use.

The invention discloses a soft-packed cell electrode lug cutting die. The soft-packed cell electrode lug cutting die comprises an upper die and a lower die, the upper die comprises an upper die seat,an upper fixed plate made of non-metallic materials is arranged below the upper die seat, two main punching-shearing mechanisms used for cutting the soft-packed cell electrode lug are arranged below the upper fixed plate, and the two main punching-shearing mechanisms are arranged symmetrically left and right on the center axis of the die. The lower die comprises a lower die seat, a lower fixed plate made of non-metallic materials is arranged below the lower die seat, two lower templates used for placing the soft-packed cell are fixedly arranged above the lower fixed plate, and the two lower template are arranged symmetrically left and right on the center axis of the die, and the locations of the two lower template correspond to the two main punching-shearing mechanisms separately. The soft-packed cell electrode lug cutting die can cut electrode lugs at the two ends of the soft-packed cell simultaneously at a time, it is ensured that the cell cannot have short circuit risk, high precision and great consistency of the electrode lugs after punching is ensured, and the machining efficiency is greatly improved by machining the electrode lugs of the soft-packed cell by the die.