66results about How to "Improve flow capacity" patented technology

The invention relates to the technical field of new energy, and discloses a battery and a battery pack, the battery comprises: a shell, the shell contains a Ti element, and the mass of the Ti element accounts for more than or equal to 60% of the total mass of the shell; the pole column is arranged on the shell; the battery cell comprises a battery cell body and tabs, the tabs comprise a positive tab and a negative tab, one of the positive tab and the negative tab is electrically connected with the pole, and the other one of the positive tab and the negative tab is electrically connected with the shell; the ratio of the mass of the Ti element of the shell to the total mass of the shell is a, the conductivity of the shell is b, and the lead-out size of the tab from the cell body is c; a. C / b is greater than or equal to 99 and less than or equal to 3650. According to the battery provided by the invention, the relationship among a, b and c is comprehensively controlled, so that the light weight of the shell is realized, the over-current capability of the battery can be met, the battery is prevented from generating relatively large temperature rise, and the condition that the safety performance of the battery is poor is prevented.

The invention belongs to the technical field of high-voltage electric appliance material preparation, and particularly relates to a zinc oxide resistor disc and a preparation method and application thereof. The preparation method comprises the following steps: (1) pre-sintering zinc oxide powder; (2) mixing the zinc oxide powder obtained in the step (1), an auxiliary agent and a dispersion liquid, and carrying out ball milling to obtain slurry; the particle size D50 of the slurry is 0.8-1.2 [mu] m, and the dispersity is greater than or equal to 95%; (3) performing spray drying and granulation on the slurry to obtain granulation powder; (4) carrying out molding and first sintering on the granulated powder to obtain a resistor disc semi-finished product; the first sintering adopts sectional sintering; and (5) forming an electrode layer on at least one surface of the resistor disc semi-finished product by adopting a vacuum sputtering and / or electrophoretic deposition process, and performing secondary sintering and annealing. The contact resistance of the zinc oxide resistor disc is less than or equal to 5m omega; and after 1000 hours of aging in a 85 DEG C + 85% RH environment, the leakage current increase is less than or equal to 2 [mu] A, and the performance degradation rate is less than or equal to 5%.

This disclosure provides a dust collection device and cleaning equipment, belonging to the field of cleaning equipment. The dust collection device includes a dust cup, a cyclone separator, a shielding member, and a drive motor. The cyclone separator is disposed within the dust cup and has a dust discharge side and a clean air discharge side arranged opposite each other along the axial direction of the cyclone separator. The cyclone separator includes multiple cyclone cones, each of which has an exhaust passage communicating with its interior and facing the clean air discharge side. The shielding member is rotatably disposed on the clean air discharge side of the cyclone separator and configured to selectively close at least a portion of the exhaust passage during rotation. The drive motor is disposed on the dust discharge side of the cyclone separator and is drively connected to the shielding member to drive the shielding member to rotate. The dust collection device and cleaning equipment provided by this disclosure can balance separation performance, flow capacity, structural compactness, and switching reliability.

The present application relates to the technical field of plunger pump, in particular to a variable stroke double cavity plunger pump, which comprises a shell and a driving motor, two delivery pipes are arranged in the shell, two groups of crankshaft assemblies are arranged on the output shaft of the driving motor, the shell is connected with the corresponding delivery pipe through the crankshaft assembly, and a first one-way valve and a second one-way valve are symmetrically arranged in the delivery pipe along the axis of the crankshaft assembly; the one-way valve comprises a reset assembly, a sealing assembly and a clamping assembly arranged in sequence from top to bottom, the sealing of the sealing assembly is realized by the elastic extension of the reset assembly and the adhesion of the clamping assembly; the sealing assembly on the first one-way valve is provided with a first negative pressure assembly, the sealing assembly on the second one-way valve is provided with a second negative pressure assembly, and the first negative pressure assembly and the second negative pressure assembly are oppositely arranged; by arranging the negative pressure disc and the connecting pipe, the stress area of the sealing ball under the negative pressure condition is increased, the opening speed is accelerated, and the fluid passing efficiency is improved.

A high-performance clamping piece type auxiliary switch belongs to the technical field of auxiliary switches. The front mounting plate, the front cover plate, the plurality of same base plate units, the rear cover plate and the rear mounting plate are sequentially connected through long countersunk screws, the driving shaft simultaneously penetrates through the middle parts of the front mounting plate, the front cover plate, the base plate units, the rear cover plate and the rear mounting plate, and each base plate unit comprises an upper base plate and a lower base plate which are the same; each substrate is provided with two movable contact pieces, two static contact pieces and a shaft gasket, a magnetic block mounting groove is formed in the middle of each substrate, a magnetic block is arranged in the magnetic block mounting groove of the upper substrate of each substrate unit, and the four movable contact pieces and the two shaft gaskets of each substrate unit are riveted together through brass rivets. According to the utility model, the through-current capability and the on-off instant stability of the contact can be effectively improved, the magnetic blow-out function and the 360-degree time sequence switching capability are high-efficiency, and the accurate indication function is also realized.

This utility model proposes a cylindrical secondary battery, including a positive electrode current collector and a negative electrode current collector. The positive electrode current collector includes a disk body and a tail body. The disk body is provided with multiple positive electrode welding areas. The area of ​​the disk body is S1, and the sum of the areas of the multiple positive electrode welding areas is S2. 100 12%S1≤S 100 ≤24%S1; The negative electrode current collector is provided with multiple negative electrode welding areas, and each negative electrode welding area is provided with multiple negative electrode solder marks. The area of ​​the negative electrode current collector is S2, and the sum of the areas of the multiple negative electrode welding areas is S. 200 Among them, 10%S²≤S 200 ≤20%S2. This utility model, by setting a positive electrode welding area and a positive electrode solder mark on the positive electrode current collector, and setting a negative electrode welding area and a negative electrode solder mark on the negative electrode current collector, and by reasonably setting the area of ​​the positive electrode welding area and the negative electrode welding area, can take into account the battery's overcurrent capacity as well as the battery's processing quality and processing efficiency, thereby effectively improving the overall performance of the battery.

The application belongs to a valve structure, and aims at the technical problem that the existing electromagnetic valve for satellites is difficult to balance in response speed, power consumption, weight, environmental adaptability and long-term reliability, and provides a special medium axial flow self-locking electromagnetic valve for satellites, which adopts open coil, close coil and permanent magnet cooperation to drive the axial movement of armature, and keeps the valve open or closed after power off, so as to reduce the continuous power consumption and improve the reliability in satellite application. The axial flow fluid channel is formed through the internal channel of the framework, the peripheral channel of the armature and the internal channel of the valve seat assembly, so as to reduce the flow resistance and improve the medium flow capacity. The valve core and the valve seat assembly sealing surface are coaxially matched, the pre-tightening and buffering effect of the elastic member are beneficial to improve the sealing stability, reduce the impact wear and prolong the service life.

This invention discloses a method for evaluating the multi-dimensional coupling aerodynamic performance of a modal selector valve and an engine, belonging to the field of aero-engines. The steps are as follows: establishing a three-dimensional model of the modal selector valve; simulating the model to obtain its flow performance; establishing a computational model of the modal selector valve and calculating the total pressure after the valve; integrating a high-fidelity characteristic calculation model of the component with a zero-dimensional model of the entire engine; inputting the engine's design point performance parameters and performing design point calculations; given the engine control law and the engine's non-design point operating conditions, performing calculations; determining the convergence of the computational model; obtaining the engine characteristic diagram and aerodynamic performance under arbitrary operating conditions, thus obtaining the aerodynamic performance results considering the overall coupling effect of the modal selector valve and the engine. This invention solves the problems in existing technologies where the calculation accuracy of the overall performance calculation code for variable cycle engines cannot meet the design requirements of variable cycle engines, and the coupling of various engine components is poor.

The application provides a battery device, an electric device and an energy storage device. The battery device comprises a box body and a soft package battery cell. The box body comprises a support plate and a frame. A plurality of soft package battery cells are stacked in a first direction. The soft package battery cell comprises a first surface and a second surface, a plurality of first surfaces are oppositely arranged along the first direction, and the support plate is oppositely arranged with a plurality of second surfaces along a second direction. The soft package battery cell comprises a packaging bag, an electrode assembly, an electrode terminal and a first insulating piece, the electrode assembly is provided with a tab portion at the end thereof along a third direction, the electrode terminal is welded with the tab portion and forms a first connecting portion, the area of the first connecting portion is 20mm 2 to 60mm 2 , the first insulating piece surrounds the electrode terminal and is arranged between the electrode terminal and the packaging bag, the first insulating piece is sealingly connected with the packaging bag and forms a second connecting portion, and the minimum distance between the first connecting portion and the second connecting portion along the third direction is 2mm-7mm.

The application belongs to the technical field of batteries, and discloses a battery cover plate and a battery. The battery cover plate comprises a cover plate body and a pole module. The cover plate body comprises a mounting plate body, an extension plate body and a protection plate body. The two sides of the mounting plate body are provided with inclined extension plate bodies. The low end of the extension plate body is connected with the mounting plate body, and the high end is connected with the protection plate body which is parallel to the mounting plate body. The junction and the middle part of the mounting plate body and the extension plate body are provided with protection bosses. The installation part is formed between the adjacent protection bosses. The protection boss is a hollow boss structure. The pole module is insulatedly connected in the installation part and on the extension plate body. The part of the pole module which is located outside the cover plate body is lower than the protection plate body. By making the part outside the pole module lower than the protection plate body, the space outside is reduced to improve the battery module assembly rate, and the damage caused by knocking is avoided. The space inside the protection boss and below the extension plate body is utilized to increase the volume of the pole group to improve the battery capacity. The multi-pole structure effectively improves the overcurrent capacity.

The invention provides a design method and system for a high-gradient power transmission line lightning arrester. The design method comprises the steps that the minimum through-flow capacity needed by the lightning arrester is calculated according to the voltage grade of a power transmission line and the lightning environment where the power transmission line is located; calculating a through-current capability margin when the high-gradient zinc oxide resistor disc independently forms a resistor disc core body by taking the minimum through-current capacity as a constraint, and further determining the composition of the lightning arrester resistor disc; designing an internal mechanical structure of the lightning arrester on the basis of determining the composition of the resistor disc of the lightning arrester; and designing an insulation height and a creepage distance, and determining the umbrella skirt structure of the lightning arrester. The lightning arrester resistor disc composition designed by the application gives consideration to the characteristics of high gradient and large through-flow of the lightning arrester, the designed internal mechanical structure reduces the internal contact resistance of the lightning arrester body and improves the overall through-flow capability, heat dissipation effect and sealing performance, and the designed lightning arrester umbrella skirt structure reduces the size of the lightning arrester and reduces the cost. And high reliability, large through-flow capacity and excellent external insulation performance are realized.

The utility model discloses a universal connecting device for preventing a lead from loosening. The universal connecting device comprises a shell main body, a universal main clamp, a top block, a fixed block, a first screw, a second screw, a lead half frame, a bottom cover, a spring and the like. A universal main clamp is mounted in the shell main body, two grooves are formed in the universal main clamp, a first limiting groove and a second limiting groove are formed in each groove, two fixing blocks are mounted through the first limiting groove, and two ejection blocks are slidably connected through the second limiting groove; a lower shell and an upper shell are installed on the front side wall and the rear side wall of the shell body correspondingly, and a spring is arranged between the top block and the fixing block. Through the above structure, the lead loosening prevention device can effectively prevent the lead from loosening, has good versatility and overcurrent capability, is suitable for connection of leads of various specifications, is convenient to install and maintain, is compact and reasonable in structure, and can prolong the service life.

The present disclosure relates to a connector structure and an electronic device. The connector structure comprises a sleeve assembly, a movable assembly partially contained in the sleeve assembly and movable along the extension direction of the sleeve assembly, a first elastic member contained in the sleeve assembly and sleeved outside the movable assembly, and one end of the first elastic member connected to the bottom wall of the sleeve assembly. When the movable assembly moves towards the bottom wall of the sleeve assembly, the other end of the first elastic member contacts the movable assembly, so that the movable assembly is tilted to make the side wall of the movable assembly contact the side wall of the sleeve assembly, forming a first flow path of the connector structure. The embodiment of the present disclosure can reduce the possibility of instantaneous disconnection of the connector structure and improve the stability of the flow of the connector structure.

The utility model relates to the technical field of lithium ion batteries, in particular to a battery cover plate and a battery monomer. The battery cover plate comprises a pole, a cover plate body and a connecting piece, the pole comprises a first step part, a second step part, a third step part and a fourth step part of which the cross sectional areas are sequentially reduced; the second step part and the third step part penetrate through the through hole of the cover plate body, and the fourth step part is welded with the hole wall of the welding hole of the connecting piece; the cover plate body is limited between the first step part and the connecting piece; the cross sections of the first step part, the second step part, the third step part and the fourth step part are elliptical or waist-shaped; the cross section area of the fourth step part is not less than 6mm < 2 >. According to the battery cover plate and the battery monomer, the problems that the over-current requirement and the strength requirement cannot be met due to the fact that most of the pole columns of the existing battery cover plate are circular, and the performance of the battery is easily damaged due to riveting vibration due to the fact that the pole columns are connected with the riveting blocks in a riveting manner are solved.

The utility model belongs to the technical field of batteries, and discloses a leading-out bar, a battery module and a battery pack, the leading-out bar is of an integrally formed structure, the leading-out bar comprises a first main body and a second main body, one end of the first main body is provided with a first connecting part, one end of the second main body is provided with a second connecting part, and the second connecting part and the first connecting part are fixed in a lap joint mode. The second main body and the first main body are made of different conductive metal materials, so that the production cost of the leading-out bar can be reduced, and the overcurrent capability of the leading-out bar can be improved.

The invention discloses a silicon carbide diode structure, a chip structure and a preparation method thereof. Each of the diode structure and the chip structure comprises a cathode metal and an N + type silicon carbide substrate above the cathode metal, and a first N-type silicon carbide epitaxial layer, a second N-type silicon carbide epitaxial layer and a P + type shielding region are sequentially arranged above the N + type silicon carbide substrate; one end, far away from the N + type silicon carbide substrate, of the second N-type silicon carbide epitaxial layer is provided with a longitudinal step groove, the longitudinal step groove penetrates through the second N-type silicon carbide epitaxial layer and a part of the first N-type silicon carbide epitaxial layer, and the side wall and the bottom of the step groove are coated by anode metal. The chip structure further comprises a plurality of cellular structures which are provided with the layers and are different in structure. According to the invention, under the condition of not increasing the area of an active region chip, the Schottky contact area can be obviously increased, the conduction loss of the device is reduced, and the anti-surge capability of the device is improved.

The utility model belongs to the technical field of battery production, and provides a single battery, a battery device and a power utilization device.The single battery comprises a shell, an electrode assembly, an electrode terminal and an adapter, and the shell is provided with a containing cavity; the electrode assembly is accommodated in the accommodating cavity, and the electrode assembly is provided with a tab; the electrode terminals are connected to the shell, and the electrode terminals and the tabs are arranged at intervals in the first direction; the adapter comprises a first adapter part and a second adapter part which are connected with each other, in the second direction, the first adapter part is opposite to and electrically connected with the tab, and the second adapter part is opposite to and electrically connected with the electrode terminal; along the second direction, the first switching part is provided with a first sub-part which is arranged opposite to the tab and is electrically connected with the tab, and the thickness of the first sub-part is smaller than that of other parts on the first switching part; the second direction is perpendicular to the first direction. The utility model aims to improve the over-current capability of the adapter so as to improve the performance of the battery monomer.

A design method of a universal antenna array plane calibration module adopts a specific DA chip to provide a local oscillator signal, performs amplification, frequency conversion and filtering in an integrated radio frequency SIP channel, designs a parallel straight-through path in a mixer link, is switched by a radio frequency switch, and selects different calibration module working modes according to the requirements of different array planes; during array plane emission, two working modes are realized, and a signal is directly generated or an up-conversion signal is generated; during array plane receiving, two working modes, namely direct sampling of signals or down-conversion sampling of the signals, are realized.

The utility model provides a battery cell, a battery cell module and a battery pack, and relates to the field of battery cell structures. A plurality of limiting parts are sequentially formed on the battery cell along the first direction, and the cross section of each limiting part is elliptical, so that the cross section area of the pole is effectively increased (compared with an existing cylindrical pole), the overcurrent capacity of the pole is effectively improved, and the use requirement of the battery cell can be met; in addition, the areas of the cross sections of the plurality of limiting parts are reduced one by one along the first direction, so that a step structure is formed on the post terminal; furthermore, the pole of the battery cell is fixed by being welded with the welding block, the rest components in the cover plate assembly can be fixed between the pole and the welding block by being matched with the structure corresponding to the step structure of the pole, and furthermore, the pole lug is welded with the bottom end surface of the welding block.

The utility model relates to the technical field of semiconductor devices, and discloses a power semiconductor device, which comprises a substrate, a chip, a power pin, a first signal pin and a second signal pin, the chip is arranged on the substrate and is electrically connected with the power pin, the first signal pin and the second signal pin; the first signal pin and the power pin are arranged on the same side surface of the substrate; the second signal pin and the power pin are arranged on different side surfaces of the substrate. The first signal pins and the power pins are arranged on the same side surface of the substrate, so that the length of a signal transmission path can be reduced, signal delay and interference are reduced, and the efficiency and reliability of signal transmission are improved. The second signal pin and the power pin are arranged on different side surfaces of the substrate, so that a multi-pin design can be realized, the welding stability of the power semiconductor device is improved, and the through-current capability and the high-power tolerance capability of the device are improved.

The invention belongs to the field of power semiconductors, and particularly relates to an asymmetric GCT chip which comprises a P + transparent emission anode, an N-base region, a P base region, a P + base region and an N + emission region partially embedded in the P + base region, or an N'buffer layer is arranged between the P + transparent emitting anode region and the N-base region; the center of the N + emitter region is provided with a groove, and the groove is filled with a cathode metal layer and is led out. According to the asymmetric GCT chip provided by the invention, a comb structure with a groove is adopted, under the same chip size, the effective area of a cathode is increased, the doping concentration of a P + base region below an N + emitter region is reduced, the opening performance of the chip is improved, the junction depth of a J3 junction is basically kept unchanged, and the turn-off capability is not reduced while the through-current capability is improved.

The invention discloses an energy storage device, and relates to the technical field of energy storage. The energy storage device comprises a connecting row, a battery pack, a BMS board and an inverter, the connecting row is electrically connected with a battery cell of the battery pack, the BMS board and a circuit board positive electrode of the inverter, or the connecting row is electrically connected with the battery cell of the battery pack, the BMS board and a circuit board negative electrode of the inverter. The internal circuit connection of the portable energy storage device can be simplified, the number of used wire harnesses is reduced, the internal resistance of the system is reduced, and the electrical connection reliability is improved.

The utility model discloses a control system for realizing drainage by tidal liquid level difference, including storage and discharge control room, the inside one side of storage and discharge control room is provided with filter assembly, and one end of filter assembly is connected with control component no.

The utility model discloses a battery assembly, and relates to the technical field of battery design. The battery assembly comprises a protection plate, at least one adapter plate, at least one first battery cell and at least one second battery cell, the first battery cell and the second battery cell are arranged at an interval, and a tab of the first battery cell is electrically connected with a first connection area of the protection plate. The adapter plate is provided with a first plug-in terminal and a second plug-in terminal which are arranged at an interval, a tab of the second battery cell is matched with the first plug-in terminal in a plug-in manner and is electrically connected with the first plug-in terminal, a third plug-in terminal is arranged in the second connecting area of the protection plate, and the third plug-in terminal is matched with the second plug-in terminal in a plug-in manner and is electrically connected with the second plug-in terminal. And the tab of the second battery cell is electrically connected with the protection plate through the adapter plate. According to the scheme, the problem that the through-current capability of the adapter plate of the current battery assembly is relatively weak can be solved.

The utility model discloses a kind of lead structures of capacitor, including lead body, the lead body includes connecting section and lead-out section, the lead-out section is connected with the connecting section, and it extends along its own axial direction;The end of the connecting section is connected with the end of the lead-out section, the other end of the connecting section is peripherally extended around the center of the lead-out section, and is surrounded in the periphery of the lead-out section.A kind of capacitor, including core element and the lead structure of the capacitor described, the connecting section is electrically connected with the core element.The lead structure is electrically connected with the end surface of capacitor by connecting section, since the connecting section of lead body is peripherally extended around the center of lead-out section, and is surrounded in the periphery of the lead-out section, so that the contact area of lead structure and capacitor increases, reduces the risk of lead drop;At the same time, effectively reduce contact resistance, reduce heat loss when current transmission, enhance overcurrent capacity.

The invention provides a method for constructing a simulation model of an on-load voltage regulation tap switch of a distribution transformer, and relates to the technical field of on-load voltage regulation of the distribution transformer, and the method comprises the steps: constructing a simulation model of the distribution transformer; the on-load voltage regulation tap switch is constructed; the protection circuit is constructed; constructing the voltage regulator and the control switch; constructing a time switch control module; constructing a control module of the on-load voltage regulation tap switch; and constructing a measurement display module. Through verification of a simulation model, the technical problems in the prior art that arc light exists during voltage regulation of a traditional mechanical on-load voltage regulation transformer, oil pollution is easy to generate, the failure rate is high, the voltage regulation flexibility is low, and the response speed is low can be solved.

A multilayer varistor and a method of manufacturing the same are disclosed. The method of manufacturing the multilayer varistor includes providing an initial multilayer structure, sintering the initial multilayer structure to form a sintered multilayer structure, fabricating the sintered multilayer structure into a multilayer stack structure including an insulating carrier, a plurality of first inner conductive layers disposed in the insulating carrier, and a plurality of second inner conductive layers disposed in the insulating carrier, and the plurality of first inner conductive layers and the plurality of second inner conductive layers are alternately arranged, and forming an outer electrode structure to partially cover the multilayer stack structure, the outer electrode structure including a first outer electrode layer electrically contacting the plurality of first inner conductive layers and a second outer electrode layer electrically contacting the plurality of second inner conductive layers, and the first outer electrode layer and the second outer electrode layer cover a first side end portion and a second side end portion of the multilayer stack structure, respectively.

The invention discloses a busbar and a converter, and belongs to the field of converters. The busbar comprises a bottom plate; the at least two first connecting ends are arranged on the bottom plate, and the at least two first connecting ends are used for being connected with the multiple bridge arms in a one-to-one correspondence mode; and the second connecting end is arranged on the bottom plate and is used for being connected with an external circuit. According to the busbar, the common end of the power device of the converter is connected through the busbar, wiring can be simplified, the through-current capability is effectively improved, large-area copper laying is not needed, and the heat dissipation capability of a circuit board, the power density of the converter and the capacity utilization rate of the power device in a converter circuit are improved.

The invention provides an RC-IGBT device structure and a manufacturing method thereof, the RC-IGBT device structure comprises a wafer, the bottom of the wafer is provided with a back metal layer, an FRD cathode and a collector electrode, the top of the wafer is provided with a cellular region, and the cellular region comprises a front metal layer, a P-Body region, a carrier storage layer, a Trench gate structure, an N-source region, a P-type deep groove region and the like. A P-Body region of an IGBT is multiplexed as an FRD anode, a P-type deep groove region penetrating into an N drift region is designed, and the layout that the back N + / P + width is accurately matched with half of the size of a front cell Pitch is matched, so that the through-current path is shortened, the conduction voltage and loss are reduced, the voltage resistance and through-current capability are improved, and meanwhile, the chip area is reduced. The RC-IGBT structure solves the problems of low cell density, large area and high loss of an existing RC-IGBT, meets the requirements of a power system for small size, high power density, low loss and high efficiency, and has remarkable technical innovation and application value.

The utility model provides a submersible slurry pump with a streamline non-clogging spiral impeller, which is characterized in that a bearing assembly (2) is fixed at the output end of a motor (1), a pump body fixing plate (3) and an impeller rear partition plate (4) are sequentially mounted on the lower end surface of the bearing assembly (2), and a spiral volute (5) is mounted on the pump body fixing plate (3); the streamline non-clogging spiral impeller (6) is installed at the output shaft end of the motor (1) through a threaded hole of a hub of the streamline non-clogging spiral impeller (6), the water outlet elbow flange (10) is connected with a water outlet flange of the spiral volute (5), the upper end of the pressing and fixing assembly makes contact with the top of the motor (1), and the lower end of the pressing and fixing assembly is fixed to the lower end face of the spiral volute (5) through a bolt. The submersible slurry pump has high overflowing capacity, meanwhile, the pressing and fixing assembly is adopted, the motor (1) is cooled, the shell of the motor (1) is prevented from being eroded, and the whole submersible slurry pump is simple in structure and easy to manufacture and maintain.