38results about How to "Improve current resistance" patented technology

The invention provides an electrode assembly, an electrophysiological catheter and an electrophysiological system. The electrode assembly comprises an electrode main body, a sub-electrode assembly and an electric transmission line, wherein the sub-electrode assembly and the electric transmission line are arranged on the electrode main body; the electric transmission line comprises a plurality of ablation lines; the sub-electrode assembly comprises a plurality of first ablation electrodes and a plurality of second ablation electrodes; each ablation line comprises a transmission main line, a first transmission branch line and a second transmission branch line; the first ablation electrodes and the second ablation electrodes are electrically connected with the output ends of the corresponding first transmission branch lines and the output ends of the corresponding second transmission branch lines respectively; and the input ends of the first transmission branch lines and the input ends of the second transmission branch lines are intersected at the transmission main lines. The transmission branch lines of different ablation electrodes are arranged in a parallel manner, so that the resistance value of the ablation lines is reduced, the current resistance of the ablation lines is improved, meanwhile, the ablation boundary of the catheter is also improved, and the ablation depth is increased.

The present invention discloses a controllable rectification comprising an inverter (10), a control panel (20) and a drive panel (30). The inverter (10) may comprise three switch element groups connected in parallel. Each switch element group may comprise at least two switch elements connected in parallel. Each switch element may comprise an upper bridge-arm switch and a lower bridge-arm. The control panel (20) may generate a PWM waveform. The drive panel (30) may generate a drive voltage according to the PWM waveform to drive the upper bridge-arm switch and the lower bridge-arm switch of each switch element to conduct or break respectively, and to make the upper bridge-arms of the same switch element group to conduct or break simultaneously, and to make the lower bridge-arms of the same switch element group to conduct or break simultaneously. The present invention further discloses an electric motor comprising the same.

The invention provides a manufacturing method of an integrally molded inductor, and belongs to the technical field of inductance elements. The method comprises the steps of winding a copper wire into a coil and electrically connecting the coil and an electrode pin; mixing a magnetic-conducting material with liquid silicone gel evenly at the mass ratio of 100:(2-15) to form a filler and carrying out heat preservation on the filler under the condition that the temperature is 70-80 DEG C for 0.2-1 hour; and putting the coil connected with the electrode pin into a mold, filling the mold with the filler and carrying out integral stamping to form the integrally molded inductor. The manufacturing method is simple; and the technological process is saved. Furthermore, the invention further provides the integrally molded inductor manufactured by the manufacturing method. The current resistance of the integrally molded inductor is significantly improved; the inductor is stable in structure; the magnetic loss can be reduced; and the noise at work can be reduced.

The invention discloses a cylindrical lithium ion battery having an internal heat dissipation and tab fixing structure, and a preparation method thereof. The lithium ion battery is characterized in that the structure of the battery includes a steel shell (1), a cover cap (2), positive plates (3), diaphragms (4), negative plates (5), an electrolyte (6), an insulating layer (7) and a conducting layer (9); and a negative tab (8) of the battery can form a soldering point (10) after spot bottom welding. The contact of the tab and a shell bottom can be significantly improved by fixing the tab through a conductive adhesive, so that current resistance capabilities can be enhanced, and the lithium ion battery is suitable for large power application batteries; risks of tab dropping caused by violentvibration can be solved through the fixation of the conductive adhesive; and through the insulating layer and the conducting layer, the heat generated during large current discharging of the batterycan be rapidly dissipated.

The invention belongs to the field of power supplies, and provides a stabilized switching power supply. A switching type DC-DC voltage stabilizer power source is formed by independent electronic elements, a wide-input voltage range is provided, the work state of an overall circuit is automatically adjusted according to input voltage, the output voltage is stable and can be set by adjusting element parameters, and the output current is determined by the input end and a circuit element. A large current element can be selected to improve the current resistance of the circuit, and the feedback link of the circuit is simple and reliable in design. As no integrated chip is used, the situation that when the voltage of a circuit of an integrated chip is used, the current parameters are basically fixed is avoided.

The invention discloses a terminal structure which is integrally formed by punching and comprises a hollow terminal head which is formed on a side wall with a butt seam and provided with a butting portion recessed toward the interior of a hollow terminal, a hollowed-out position is arranged on a side wall opposite to the butting portion and provided with an elastic limiting piece, a root of the elastic limiting piece is fixedly connected with an edge of the hollowed-out position, and the other end of the elastic limiting piece extends toward the interior of the hollow terminal in a suspended manner. The butting portion and the elastic limiting piece are simultaneously arranged on the head of the hollow terminal, so that the requirement of close contact of a plug and the terminal is met, plug in-and-out force is more stable when the plug is plugged in and out, and poor contact is avoided. In addition, contact area of the plug and the terminal is increased, so that heat concentration is eased while larger current can be resisted with no heat generated, and the service life of the terminal is effectively prolonged.

The invention relates to a high-frequency absorptive film of a capacitor. Four layers of films are wound coaxially to form a capacitor core; the film comprises a first metallized film, a second metallized film, a third metallized film and a fourth metallized film sequentially from inside to outside; the first metallized film is a two-side metallized film; the third metallized film is a single-side metallized film; the second metallized film and the fourth metallized film are optical films. According to the high-frequency absorptive film of the capacitor disclosed by the invention, the volume of the capacitor is smaller than that of a capacitor which is formed from a conventional winding structure in a winding manner at the presence of the same voltage-tolerant strength; in addition, the current tolerance of the capacitor is increased, the high-frequency impact tolerance is also increased a lot, and the practical use requirements are satisfied.

The invention discloses a wave-cut remaining edge type thin-film capacitor, which comprises a capacitor core 1 and a capacitor body 2. The capacitor core 1 is composed of four parts which are two layers of parallel thin-film dielectric 3, a metal coating electrode 4 located on the thin-film dielectric 3, a metal spraying layer on the surface of the metal coating electrode 4 and a lead 5 welded on the metal spraying layer. The right side of the metal coating electrode 4 and the right side of the thin-film dielectric 3 are both of a wave-shaped structure formed in a wave-cut manner. A remaining edge 6 is disposed between the right side of the metal coating electrode 4 and the right side of the thin-film dielectric 3. The invention has the beneficial effects of enhanced current resistance, low loss, safety and environmental protection, simple structure and high practicality.

The invention provides a large-power wire-wound plate type inductor. The large-power wire-wound plate type inductor comprises a magnetic core and a coil wound on the magnetic core; two mounting pins are arranged at the bottom surfaces of the magnetic core at interval, two ends of the coil are electrically connected with two mounting pins, and a ring slot is arranged around the magnetic core; the coil is wound on the magnetic core and arranged in the ring slot; the coil comprises two conductors; two conductors are wound on the magnetic core in parallel; two ends of each conductor are electrically connected each of two mounting pins. The ring slot is arranged around the magnetic core to hold the coil, thereby guaranteeing that the coil is stably arranged on the magnetic core, and the impactresistance of the manufactured inductor is improved; two conductors are wound on the magnetic core in parallel to form the coil, the DC resistance can be reduced, the current resistance is greatly improved under the same volume, and then the miniaturization and the large power are realized.

The invention relates to a SMD type PTC thermistor preparation method, and belongs to the field of electronic component preparation. The preparation method comprises: mixing BaTiO3, SrCO3, MnO2, Y2O3, SiO2 and graphite to prepare a spare material, and carrying out ball milling by using a 200 kg mill ball, wherein the ball milling media uses agate balls; pre-burning, wherein the pre-burning process uses a tunnel furnace; granulating, carrying out pressing molding after completing the granulating, and sintering by using a bell furnace; and finally welding an electrode by using a reflux welding manner to prepare the thermistor. According to the present invention, through the process improvement, the small size sheet-like surface adhesion type ceramic overcurrent protection element is prepared, such that the area of the circuit board is substantially reduced, the assembly process is simplified, and the circuit density is improved; and by adding the graphite, the micro-pores are formed in the ceramic so as to increase current resistant of the ceramic sheet.

The invention discloses a high current resistance vehicle power off switch. The high current resistance vehicle power off switch comprises a casing body, a movable contact assembly and a static contact assembly, wherein the movable contact assembly and the static contact assembly are arranged in the casing body. The high current resistance vehicle power off switch further comprises a rotating shaft assembly which controls the movable contact assembly move up and down. The movable contact assembly comprises a copper plate and a pair of silver contact which is arranged on the copper plate. The static contact assembly comprises two wiring terminals. Each wiring terminal is provided on a silver contact. The diameter of each silver contact is between 9 and 10mm. The high current resistance vehicle power off switch provided by the invention has the advantages of high structural strength and great tightness, can meet harsh environment requirements, can withstand high current and high voltage, can meet the performance requirement of power on and off of a vehicle, and can be widely used in the field of the resistance vehicle power off switch.

The invention discloses a thin film capacitor, which comprises a capacitor core, at least one first metal shell, at least one second metal shell, a first connecting sheet and a second connecting sheet, the first metal shell and the second metal shell are spliced together through an insulator to jointly define an accommodating cavity; the first metal shell is provided with a first leading-out terminal, and the second metal shell is provided with a second leading-out terminal; the first connecting sheet is connected with the capacitor core and the first metal shell; the second connecting sheet is connected with the capacitor core and the second metal shell; the capacitor core, the first connecting sheet and the second connecting sheet are arranged in the accommodating cavity and are sealed through pouring sealant; therefore, the capacitor has better heat dissipation capability while the current resistance capability is improved, and the thermal resistance of the product is greatly reduced.

The invention belongs to the field of power supplies, and provides a stabilized switching power supply. A switching type DC-DC voltage stabilizer power source is formed by independent electronic elements, a wide-input voltage range is provided, the work state of an overall circuit is automatically adjusted according to input voltage, the output voltage is stable and can be set by adjusting element parameters, and the output current is determined by the input end and a circuit element. A large current element can be selected to improve the current resistance of the circuit, and the feedback link of the circuit is simple and reliable in design. As no integrated chip is used, the situation that when the voltage of a circuit of an integrated chip is used, the current parameters are basically fixed is avoided.

The invention discloses a welding technology for pure nickel and nickel plated brass material laminated solder paste. The welding technology comprises the following steps of producing a special pure nickel and nickel plated brass material laminated screen board for printing; performing bidrectional printing on nickel sheets or copper cladding nickel sheets by applying a nickel sheet printing fixture; laminating and aligning two nickel sheets with the copper cladding nickel sheets, and allowing the error of the two nickel sheets and the copper cladding nickel sheets after laminating to be smaller than a set tolerance standard; loading and fixing the laminated nickel sheet and copper cladding nickel sheet by using a permanent magnet solder pallet carrier; adjusting the welding temperature, and performing reflow soldering by using a mesh belt solder pallet or a rail solder pallet; and performing heat-sink cooling on the nickel sheet printing fixture by using a high-speed cooling fan, andchecking the quality of laminated and welding nickel sheet products. The welding technology for the pure nickel and nickel plated brass material laminated solder paste can improve the current resistance of the nickel sheets and ensure the welding quality and has wider use range of products; in particular to the design of a lithium battery pack, the manufacturing cost is greatly reduced, and equipment investment is reduced; and in addition, the development speed of new products is high, the investment is low and the quality reliability is higher.

The invention provides a flip LED chip and a production method thereof. The flip LED chip comprises: a substrate, an epitaxial layer which is located on the substrate and comprises an N-type semiconductor layer, an active layer and a P-type semiconductor layer which are stacked in sequence, a metal reflecting layer, an insulating reflecting layer and a welding metal layer, wherein an N-type groove for exposing the N-type semiconductor layer is formed in the epitaxial layer; the metal reflecting layer is located on the P-type semiconductor layer and provided with a plurality of metal layer through holes, and the P-type semiconductor layer is exposed out of the metal layer through holes; the insulating reflecting layer is positioned on the metal reflecting layer, fills the metal layer through hole and covers the side wall of the N-type groove so that the insulating reflecting layer is in contact with the P-type semiconductor layer; and the welding metal layer is positioned on the insulating reflecting layer and comprises an N-type welding metal layer and a P-type welding metal layer. The metal layer through holes are formed in the metal reflecting layer so that the insulating reflecting layer is in contact with the P-type semiconductor layer, and the contact capacity of the metal reflecting layer and the P-type semiconductor layer is improved.

The invention relates to a multipoint plug (1) for electrically connecting metallic strip conductors (21, 22) arranged on both sides of a circuit board (11) comprising a base body (2) provided with mutually opposite flexible contacts (3, 3a, 3b, 3c) which are longitudinally arranged in such a way that the front face of the circuit board (11) is insertable between said contacts (3, 3a, 3b, 3c), thereby producing electric contact thereof with the strip conductors (21, 22). The opposite contacts (3, 3a, 3b, 3c) are electrically insulated with respect to each other inside the base body (2). The aim of the invention is to develop a small-sized multipoint plug which exhibits as high electric strength as possible. For this purpose, a recess (24) is shaped between opposite contacts (3, 3a, 3b, 3c) in a longitudinal direction of the base body. When the circuit board (11) is inserted, said recess encompasses the frontal face thereof in such a way that an extended creepage distance is formed between opposite contacts (for instance, 3a, 3b).

The invention belongs to the field of precision current sensing elements and particularly relates to a structure of a multi-layer structured precision current sensing element with a radiating layer, and a manufacturing method for the structure. The multi-layer structured precision current sensing element comprises at least one layer of resistor body, two layers of radiating sheets, electrodes, an insulation heat conduction adhesive layer, via holes and a protection layer, wherein an insulation slit is formed between the radiating sheets; the insulation heat conduction adhesive layer is arranged between one metal layer and another metal layer; the electrodes are arranged on two sides of a product; the electrodes are connected with the resistor body and the radiating sheets; a via hole is formed in each electrode; and the via holes are connected with the resistor body and the radiating sheets. In the manufacturing method, the thick resistor body is decomposed into a plurality of thin resistor bodies; the thin resistor bodies are subjected to resistance modification, and alloy sheets are connected in parallel with one another; each resistor body is at least provided with one radiating sheet for radiation, so the radiating property of the product is enhanced greatly; furthermore, a layer of protection layer is covered on the outer layer of the multi-layer structured precision current sensing element. The precision current sensing element is high in practicability.

The invention discloses a transformer structure with effects of bearing large current and dissipating heat. The transformer structure includes a circuit board, a current bearing plate, a transformer core, two wire windings and two plate windings. A rectifying and filtering circuit is disposed on the circuit board and includes at least a filtering inductor, a filtering capacitor and a rectifying switch. The filtering inductor is composed of a deflector on the circuit board and an inductor core placed on the deflector. The current bearing plate is stacked on the circuit board and is electricallyconnected to the rectifying and filtering circuit. The transformer core is disposed on the circuit board. The two plate windings are made of electrode plate materials. At least one round of iron coreis wound around the transformer and fixed on the circuit board. The plate windings are electrically connected to the deflector and the current bearing plate to jointly bear the current flowing through the transformer structure.

The invention relates to a metallized film capacitor and a metal layer spraying and heat treatment method thereof, the metallized film capacitor comprises a capacitor core, and the metallized film capacitor is characterized in that the capacitor core is of a round core type or a flat core type and is formed by winding at least one polypropylene film, and a plurality of metal layers are respectively sprayed at the upper end and the lower end of the capacitor core after the capacitor core is wound; wherein a plurality of evaporation aluminum layers are distributed on the surface of the polypropylene film, metal thickening layers are arranged on the evaporation aluminum layers, and reserved edges are arranged between the adjacent evaporation aluminum layers. And a plurality of different materials are adopted to spray the plurality of metal layers, so that the end face over-current capability and the heat dissipation capability of the capacitor product are effectively improved. Through cooperation of heat treatment and a hot pressing clamp, it can be effectively guaranteed that the temperature difference inside and outside the capacitor core is small, it is guaranteed that internal tension of the wound capacitor core is fully released, uniformity of internal tension of a polypropylene film is guaranteed, the application range is wide, and practicability is high.

The invention relates to the technical field of cooling fan controller assemblies, especially to a structure of a high-power brushless cooling fan power module. The reverse-connection-preventing structure for of the high-power brushless cooling fan power module effectively improves the current resistance of a system, saves a certain space, has a function of preventing reverse connection of a powersupply, improves heat dissipation efficiency, enhances the safety performance of a motor, is suitable for various motors in the automobile industry, ingenious in electronic and mechanical structure cooperation and easy to achieve, and presents good prospects.

The invention provides a low-thickness current-resistant SiC PIN diode and a manufacturing method thereof. The diode is characterized in that the lower side surface of an N-type heavily-doped semiconductor transmission layer is connected to the upper side surface of an N-type ohmic electrode; the lower side surface of an N-type intrinsic layer is connected to the upper side surface of the N-type heavily-doped semiconductor transmission layer; the lower side surface of a P-type heavily-doped diamond transmission layer is connected to the upper side surface of the N-type intrinsic layer; and the lower side surface of a P-type ohmic electrode is connected to the upper side surface of a P-type heavily-doped diamond transmission layer. Thus, the thickness of the diode is reduced, and current-withstanding capability is increased by four times.