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.

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 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.

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 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.

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.

In a card connector for connecting a card, a cover is engaged with an insulator holding a conductive contact and is movable with respect to the insulator for bringing the card into contact with the contact. The cover has a card receiving portion for receiving the card and first and second card holding portions extending from the card receiving portion to hold opposite side edges of the card in cooperation with the card receiving portion. The first card receiving portion has an end piece extending in an inclined position with respect to the card receiving portion. Therefore, the end piece is contacted with one edge of the card on connecting the card but is faced to and spaced from a principal surface of the card which is adjacent to the one edge.

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 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.