23results about How to "Achieve electrical isolation" patented technology

This invention discloses a circuit board processing method and circuit board processing equipment, comprising: processing a first through hole on a multilayer circuit board, the multilayer circuit board including a first solder mask layer and a second solder mask layer respectively disposed on two adjacent circuit boards, the first solder mask layer and the second solder mask layer being disposed opposite to each other, and the first through hole penetrating the first solder mask layer and the second solder mask layer; performing a desmearing process on the multilayer circuit board to form a first space on the first solder mask layer and a second space on the second solder mask layer; depositing a first metal layer on the inner wall of the first through hole, the first space and the second space; removing the first solder mask layer and the second solder mask layer, and electroplating a second metal layer on the first metal layer on the inner wall of the first through hole to obtain a target circuit board including a target metallized hole, so as to completely remove the low-density first metal layer deposited in the first solder mask layer and the second solder mask layer, so as to achieve complete electrical isolation between the two adjacent circuit boards with the first solder mask layer and the second solder mask layer, and achieve zero residual solder.

A battery thermal runaway multi-stage early warning device and its control method belong to the technical field of lithium ion power battery safety monitoring. In the device, the capacitor displacement sensor adopts a parallel plate capacitor structure to monitor the deformation of the battery cell; the three-layer step temperature sensor is composed of three layers of temperature changing materials arranged in concentric circles, independently outputs step signals of three temperature nodes of 85 DEG C, 135 DEG C and 200 DEG C, and realizes the internal temperature monitoring of the battery; the pressure sensor of the pressure relief valve film monitors the pressure change at the battery pressure relief valve. After the signals of various sensors are collected and processed, they are input into the logic judgment unit, combined with the multi-signal composite judgment to output the three-stage early warning signal, and then driven by the isolation driving unit to drive the corresponding LED indication. The valve adopts triple sensing fusion and pure hardware logic hierarchical judgment, realizes accurate early warning of early, middle and late thermal runaway, has fast response speed, high reliability, compact structure and is suitable for various batteries, and can effectively improve the safety of battery use.

The invention discloses a battery cell connecting bar and a battery module, the battery cell connecting bar comprises a conducting bar and a plurality of connecting sheets, and each connecting sheet comprises a battery cell connecting part, a middle connecting part and a conducting bar connecting part which are connected in sequence; the battery cell connecting part is electrically connected with the battery cell, and the conducting bar connecting part is electrically connected with the conducting bar; the middle connecting part comprises a fusing structure; and the arrangement direction of the connecting sheets is parallel to the extension direction of the conducting bar. According to the technical scheme, in the early stage of thermal runaway of the battery cell, the thermal runaway battery cell can be cut out in time, electrical isolation is achieved, the runaway intensity of the thermal runaway battery cell is reduced, and thermal runaway spreading is avoided.

The utility model discloses a CT self-power-taking protection device, and belongs to the technical field of power relay protection. The device comprises a fault current detection loop, a CT power taking loop and a self-protection module. The fault current detection loop is composed of a phase current detection device, a zero-sequence current synthesis detection device and an over-current fuse device and is used for detecting an inter-phase and zero-sequence over-current fault, and the over-current fuse device is fused when the fault occurs; the CT power taking loop is provided with a rectifier bridge, a CT opening voltage storage capacitor, a high-voltage trigger conduction diode and an output loop, CT opening energy can be obtained through the voltage storage capacitor and the diode, and the output loop drives a trip coil to trip off a circuit breaker to cut off a fault loop; the self-protection module comprises an overvoltage protection loop and an overcurrent protection loop, is composed of a current-limiting resistor, and can clamp and discharge abnormal high voltage and overcurrent in the loop. The device adopts a full-analog circuit design, has the advantages of quick response, high reliability, strong interference resistance and the like, can quickly and accurately act in a complex electromagnetic environment, and effectively guarantees the safety of a power system.

This invention discloses an isolated, fully soft-switching AC-DC-AC converter with primary and secondary side co-multiplexing and a modulation method. The converter includes a front-stage AC-DC converter, an intermediate-stage full-bridge LLC resonant converter, and a rear-stage DC-AC converter. This invention multiplexes the primary-side bridge arm of the full-bridge LLC resonant converter with the output bridge arm of the front-stage AC-DC converter, and the secondary-side bridge arm with the input bridge arm of the rear-stage DC-AC converter, forming an integrated AC-DC-AC converter structure, thereby reducing the number of components. Simultaneously, it employs PWM and phase-shift modulation strategies to control the inductor current of the four-transistor Buck-Boost circuit into a quadrilateral inductor current, thus achieving soft switching of all switching transistors. This topology is suitable for isolated AC conversion scenarios, enabling soft switching of switching devices, electrical isolation, wide-range voltage regulation, and effectively reducing the number of components. It also offers advantages such as high power density, high conversion efficiency, and high reliability.

The present application relates to the technical field of semiconductor, in particular to a deep via hole preparation method and a preparation method of back-illuminated image sensor, comprising the following steps: providing a semiconductor stack structure, the semiconductor stack structure comprising a composite layer and a termination layer, a local stop layer being formed on the composite layer and being close to the termination layer; etching the composite layer to the termination layer and stopping at the local stop layer; removing the local stop layer, etching the composite layer to the termination layer and stopping at the termination layer to form the deep via hole. According to the design position of the deep via hole and the vertical depth of the first etching, the local stop layer is preset in the corresponding area of the composite layer, so that the damage of the lower structure caused by over-etching in the traditional process can be avoided.

The utility model discloses a perovskite battery based on mask technology, the utility model discloses an insulation groove is formed by using nanosecond laser to carve on the top of transparent conductive oxide base, divides the base into a plurality of independent unit area, realizes the electrical isolation between the unit in the assembly, fundamentally avoids the occurrence of crosstalk and short circuit phenomenon. This design not only ensures the independence of each battery unit, improves the overall output efficiency of the assembly, but also provides a reliable electrical separation basis for series design. In addition, the functional layers in the assembly structure are arranged in turn, from the transparent conductive oxide base to the back electrode, the layers are in close contact and each has its own function, through the efficient absorption, transmission and collection of photo-generated carriers, the photoelectric conversion efficiency of the battery is maximized.

This invention proposes a back-gate oxide semiconductor device and its fabrication method. The device uses a natural oxidation method to form the natural oxide layer of the source and drain electrodes, achieving electrical isolation between the source, drain, and metal passivation layer. This eliminates the need for offsets between the source / drain electrodes and the passivation layer, thus enabling size miniaturization. Simultaneously, since offsets are no longer required between the source / drain electrodes and the passivation layer, the metal passivation layer can cover the entire upper surface of the OS channel, thereby capturing more oxygen from the OS material. This generates a large number of oxygen vacancies in the OS channel, increasing the carrier concentration in the contact areas with the source and drain electrodes, resulting in excellent carrier mobility.

This invention provides an IGBT device. A temperature sensor is integrated on one side of the cell region within the IGBT device to monitor the device's actual temperature in real time. Multiple diodes are connected in series within the temperature sensor to amplify the temperature sensing signal, improving measurement accuracy and sensitivity, and enhancing the anti-interference capability of the temperature sensing. Each diode is located on the field oxide layer to achieve electrical isolation. Furthermore, the field oxide layer has a specific size to prevent high-voltage breakdown and enhance device reliability. Each diode also has an N-type doped region and a P-type doped region; the N-type and P-type doped regions are respectively connected to metal plugs for electrode leads. Furthermore, the metal plugs are of a specific size to reduce contact resistance and further enhance device performance.

The utility model belongs to the technical field of engines, and discloses an oil pan assembly which comprises an oil pan body, a heating part and an oil stirring assembly, an oil containing cavity is formed in the oil pan body, and the heating part is located in the oil containing cavity and used for heating engine oil in the oil containing cavity. The oil stirring assembly comprises stirring blades located in the oil containing cavity and a driving part located outside the oil pan body, and an output shaft of the driving part extends into the oil containing cavity and is connected to the stirring blades, so that the driving part can drive the stirring blades to rotate so as to stir engine oil in the oil containing cavity; according to the engine oil preheating device, the heating piece heats engine oil in the oil containing cavity, meanwhile, the output shaft of the driving piece drives the stirring blade to rotate, so that the stirring blade stirs the engine oil in the oil containing cavity, the engine oil in the oil containing cavity is heated more uniformly, the engine oil preheating efficiency is improved, and the engine oil preheating time is shortened.

The utility model discloses a miniature electric heating tube for small household appliances, which comprises a tube body, an end cover is arranged at the open end of the tube body, an insulating support rod is arranged at one end, facing the tube body, of the end cover, an electric heating wire is arranged on the insulating support rod, an insulating filler is arranged in a gap between the electric heating wire and the inner wall of the tube body, and the insulating filler is arranged in the gap between the electric heating wire and the inner wall of the tube body. Two ends of the heating wire are respectively connected with two pins, two through holes are arranged on the end cover, and one ends of the two pins respectively extend out of the two through holes. The electric heating tube has the advantages that the electric heating wire is wound on the insulating supporting rod, electric isolation is achieved, short circuit caused by direct contact between the electric heating wire and the tube body is prevented, and safety is improved. A gap between the heating wire and the inner wall of the tube body is filled with an insulating material, so that the insulating property is enhanced and element wear caused by vibration is reduced. Compared with a traditional miniature electric heating tube, the miniature electric heating tube with the optimized structural design has the advantage that the safety and the stability are effectively improved.

The utility model relates to the technical field of solenoid valve decoders, and discloses a solar wireless valve controller. The utility model aims to solve the technical problems that a wired decoder in the prior art needs to lay a large number of wires, the labor cost is high, the maintenance is complicated, and the solar energy utilization efficiency is low. The system comprises a controller connected with a plurality of electromagnetic valves, the controller is connected with a motor driving module and a wireless communication module, and the motor driving module comprises two motor driving chips RZ7899 so as to realize double-shaft tracking rotation of a solar panel; the wireless communication module comprises a LoRa radio frequency chip; the input end of the power supply module is connected with the solar panel, and the output end of the power supply module is connected with the energy storage battery; the power supply module further comprises a signal processing circuit, and the signal processing circuit comprises two optical couplers. According to the utility model, automatic control and management of the electromagnetic valve are realized. The efficiency and the reliability of the system are improved, the operation cost is reduced, and remarkable economic and social benefits are achieved.

The utility model relates to a motor double-layer splicing type control panel, comprising a low-voltage main control panel, a low-voltage main control panel integrated with a main control circuit, the main control circuit comprising a control chip; a driving circuit formed by a plurality of MOS (Metal Oxide Semiconductor) tubes is integrated on the high-voltage high-current board, the low-voltage main control board and the high-voltage high-current board are arranged at intervals up and down, and a plurality of capacitors are arranged at the edge of one surface, facing the low-voltage main control board, of the high-voltage high-current board. The low-voltage main control board is provided with an avoiding notch matched with the capacitor; one end of each conductive connection female head is connected with the high-voltage high-current board, and the other end of each conductive connection female head extends out of the low-voltage main control board; one end of each conductive connecting pin is connected with the low-voltage main control board, and the other end of each conductive connecting pin is connected with the high-voltage high-current board.

The industrial controller comprises the all-in-one machine and at least one driving board, the all-in-one machine is connected to the driving board through a cable, and the driving board is provided with a wiring terminal used for being connected with an external sensor and a load. The driving board is provided with a modularized output unit and an input signal processing circuit, and the modularized output unit comprises at least one pluggable driving module, so that a man-machine interface and a PLC core function are integrated in the all-in-one machine, an independent PLC module, a special communication module and a complex middle wiring are omitted, the hardware cost is greatly reduced, and the cost is reduced. The relay, the field effect transistor and the silicon controlled rectifier module are installed in a pluggable mode, and replacement efficiency is improved.

The application relates to the field of circuit control technology, in particular to a voltage isolation sampling method and circuit, which comprises the following steps: acquiring a voltage input signal; performing error amplification processing on the voltage input signal to output a characteristic voltage signal; and controlling an arc voltage output by a welding machine according to the characteristic voltage signal, wherein the characteristic voltage signal is in proportional relationship with the arc voltage. The application has the effect of realizing voltage isolation sampling with low cost and simple circuit.

The utility model relates to a kind of three-level main control device, belong to battery energy storage control equipment technical field, including BMS three-level controller, storage unit, clock unit, the communication unit with several kinds of communication interface and the power unit for the power supply of entire device;Storage unit, clock unit and communication unit are all connected to BMS three-level controller.The three-level main control device in the utility model integrates CAN bus interface, 485 interface, Ethernet interface and WIFI / Bluetooth interface and other various communication interfaces, can directly adapt to the access needs of diversified equipment, avoids the data exchange problem caused by communication interface mismatch, improves the communication compatibility and interoperability between equipment.

This disclosure provides a method for fabricating a laser chip. An electrically isolated layer group comprising a first N-type InP layer, a second N-type InP layer, and a first active layer are sequentially grown on a substrate. A second active layer is grown outside a first position of the first active layer. First and second electrically isolated layers and a conductive layer are grown at the interface between the first and second active layers. Second and third P-type InP layers and a contact layer are sequentially grown on the first active layer, the conductive layer, and the second active layer. A second position of the contact layer is etched down to the third P-type InP layer. Both the first and second contact layers are etched down to the first N-type InP layer. A passivation layer is grown and etched down to the first and second contact layers and the first N-type InP layer. Positive and negative electrodes are grown. In this disclosure, the substrate is conductive, avoiding the problem of charge accumulation on the substrate surface leading to internal electric field distortion. The electrically isolated layer group prevents current from flowing from the second N-type InP layer into the substrate. The first N-type InP layer is conductive, enabling the positive and negative electrodes to conduct.

This invention discloses a film capacitor with dual electronic control including a power relay, EMC filtering, and heat dissipation device, belonging to the field of capacitor technology. The film capacitor includes a casing, an EMC filtering component, and a copper busbar assembly. The copper busbar assembly includes a first positive copper busbar and a second positive copper busbar, which connect two separate circuits into a dual electronic control circuit. This allows for more reliable logic control with simplified hardware, resulting in high sensitivity and good coordination for controlling subsequent equipment. After assembly, this capacitor reduces the number of electronic components, saving space. Furthermore, the centralized control logic reduces the number of fault points, making subsequent fault diagnosis easier and reducing energy consumption from redundant components.

The utility model discloses an explosion-proof capacitor with insulation protection, comprising an explosion-proof block, a cover plate and an electric connection assembly, the explosion-proof block is installed in a housing of the capacitor; the cover plate covers the opening of the shell of the capacitor in a sealing manner and is positioned above the explosion-proof block; the electric connection assembly comprises a first metal sheet arranged on the cover plate, a second metal sheet arranged on the explosion-proof block and a conducting rod penetrating through the cover plate and the explosion-proof block, one end of the conducting rod is welded and fixed to the first metal sheet, and the other end of the conducting rod is welded and fixed to the second metal sheet to form an explosion-proof welding spot. The explosion-proof capacitor further comprises an insulating block which is arranged at the bottom of the explosion-proof block and located below the second metal sheet, and the insulating block is used for separating the explosion-proof welding spot from the capacitor core. Therefore, the insulating block is arranged at the bottom of the explosion-proof block, and the insulating block can separate the explosion-proof welding spot from the capacitor core, so that electrical isolation between the explosion-proof welding spot and the capacitor core is realized, and an insulating protection effect is further achieved; in addition, the insulating block can also prevent high temperature from being transmitted to the core from the explosion-proof welding spot and prevent the physical impact of the second metal sheet from influencing the core, so that the effects of thermal isolation and mechanical isolation are achieved.

The invention discloses a rail vehicle battery failure activation method and system based on dynamic minimum impedance, and the method comprises the steps: building a topological structure of an SI-MISO converter synchronously activated by a plurality of batteries, and controlling the SI-MISO converter through a cooperative control strategy based on TDM and phase interleaving; the minimum impedance frequency of the battery is detected through an online broadband impedance detection method, and a failure battery is diagnosed; and in an activation time window corresponding to the target battery to be activated, the SI-MISO converter is switched to a Buck mode, an activation time-varying duty ratio instruction is generated according to the minimum impedance frequency, zero static error tracking of the resonant frequency is realized by using the PR controller, and unity power factor activation current is injected to activate the failed battery. According to the invention, the problems of low detection efficiency and high hardware cost in the operation and maintenance of the existing railway vehicle battery and the problems of poor activation efficiency, poor effect and high safety risk in the traditional activation method are solved.

This invention relates to the field of inertial device technology, specifically to a MEMS inertial device and its fabrication method. The device comprises a lower cover plate, a device layer, and an upper cover plate stacked and bonded sequentially from bottom to top. One of the upper cover plate and the device layer has a surface doped layer, and the other is bonded to the surface doped layer. The upper cover plate and the device layer have the same conductivity type, but the conductivity type is opposite to that of the surface doped layer. This invention forms two back-to-back PN junctions at the bonding interface between the upper cover plate and the device layer. When a positive or negative voltage is applied to the device layer, one of the two PN junctions will always be in a reverse cutoff state, providing insulation and thus achieving electrical isolation between the upper cover plate and the device layer. Simultaneously, by removing the silicon oxide insulating layer at the bonding interface between the upper cover plate and the device layer, the internal stress caused by the difference in thermal expansion coefficients of different materials at the bonding anchor points is reduced, improving key indicators such as the device's temperature drift characteristics and long-term stability.

The application provides a terminal structure and a preparation method thereof and a power device. The terminal structure comprises a drift layer, an equipotential ring, a first insulating layer, a gate switching structure, a second insulating layer and a gate line. The drift layer comprises opposite first and second surfaces, the equipotential ring extends into the drift layer from the first surface, the first insulating layer comprises a first part and a second part and is arranged on the first surface, the gate switching structure is arranged on a side of the first insulating layer away from the drift layer, the orthographic projection of the first part on the first surface does not overlap the orthographic projection of the gate switching structure on the first surface, the orthographic projection of the second part on the first surface is located in the range of the orthographic projection of the gate switching structure on the first surface, and the maximum thickness of the first part is less than the maximum thickness of the second part. The terminal structure can be applied to the power device to improve the withstand voltage performance and reliability of the power device.

This invention discloses a lubrication system device for oilfield pumping units, belonging to the field of lubrication technology. The device includes a lubrication control box and external lubrication pipelines. The lubrication control box houses a two-stage, multi-channel, separately controlled lubrication pump, comprising a rotary lubrication pump and multiple follow-up adjustable piston metering pumps. The rotary lubrication pump drives the piston sleeves of each metering pump in reciprocating motion. Each metering pump has a built-in independent oil volume adjustment mechanism for precisely setting the single-output oil volume at the corresponding lubrication point. Furthermore, each metering pump is directly driven by mechanical power without relying on pipeline back pressure. This invention avoids the pressure loss caused by the passive obstruction of adjustment in traditional distributors, ensuring that both high and low lubrication points receive the required pumping pressure and oil volume. Simultaneously, the metering pumps and rotary pumps maintain mechanical linkage, resulting in reliable operation and high repeatability, making it suitable for long-term continuous operation in oilfields.