62results about How to "Achieve electrical insulation" patented technology

The invention relates to a method for preparing a transparent and insulating graphene composite heat-conducting film. According to the method, the heat-conducting film is prepared through the compositing of nanocellulose, graphene and boron nitride. Through filtration drying of nanocellulose dispersion liquid, a nanocellulose film is obtained, the nanocellulose film is immersed in graphene oxide solution, the obtained film is immersed in the nanocellulose dispersion liquid, and a nanocellulose - graphene oxide composite film is obtained by repeating the two-step operations many times, the composite film is placed in a solution to be restored, and a nanocellulose-graphene film is obtained. Mixed solution of the nanocellulose and boron nitride is prepared through an ultrasonic mixing method. The obtained film is immersed in the mixed solution of the cellulose and boron nitride, and a nanocellulose - graphene - boron nitride heat-conducting film is obtained. The film has superhigh anisotropy and is suitable for horizontal heat dissipation of a modern electronic device. The film is good in transparency. Since an outer layer is a mixed film of boron nitride and cellulose, an electric insulation effect can be achieved, and requirements of special electronic devices are met.

The present invention discloses one kind of sealing device for 6x10<-8> Pa aultra high vacuum circular planar magnetically controlled sputtering target. The sealing device includes one water cooling cavity with soft iron and magnetic steel, one water cooling cavity sealing flange with metal O-ring, one water inlet pipe and one water outlet pipe welded to the water cooling cavity sealing flange, one target supporting seat with one electrode insulating layer and two groups of O-rings, one installing flange welded to the target supporting seat and other parts. The present invention can ensure vacuum degree as high as 6x10<-8> Pa.

The invention provides a plasma sealing structure for a discharge chamber of an annular magnetic steel ring cutting field ion thruster. The plasma sealing structure comprises a ceramic ring, a shielding cover and a Z-shaped sealing ring; peripheral equipment comprises a grid assembly, an anode, an insulation supporting assembly and a supporting ring of the ion thruster, and the anode is of a stepped cylinder structure and comprises a large-diameter cylinder and a small-diameter cylinder; the shielding cover is installed on the outer wall of the upper end of the small-diameter cylinder of the anode, the ceramic ring is located below the shielding cover and fixed to the end face between the large-diameter cylinder and the small-diameter cylinder of the anode, and the shielding cover shieldspart of the end face of the ceramic ring and the inner wall face of the ceramic ring to realize shielding and realize electric insulation between the anode and the grid assembly; and the horizontal end face of one side of the Z-shaped sealing ring is fixed to the bottom face of the grid assembly, and the horizontal end face of the other side is compressed at the top end of the ceramic ring to complete plasma sealing of the discharge chamber. The problems of electric insulation between the grid assembly and the anode of the ion thruster in a long-term plasma environment and plasma sealing of the discharge chamber are solved.

The invention discloses a multi-tab battery. The multi-tab battery comprises a battery cell assembly, a shell assembly, a pole assembly and insulating parts. The battery cell assembly comprises a positive plate and a negative plate; the positive plate comprises a positive substrate and a plurality of positive tabs; the negative plate comprises a negative substrate and a plurality of negative tabs; the positive tabs and the negative tabs extend outwards from the same end of the battery cell assembly along the radial direction to two opposite sides of the battery cell assembly and then are bent towards the other end along the axial direction; the shell assembly comprises a shell, the shell comprises a bottom wall and a side wall extending upwards from the periphery of the bottom wall, and a positive electrode hole and a negative electrode hole which are oppositely distributed are formed in the side wall; the pole assembly comprises a positive pole penetrating through the positive hole and connected with the positive tabs and a negative pole penetrating through the negative hole and connected with the negative tabs; and the insulating parts are arranged between the shell and the battery cell assembly and between the shell and the pole assembly. According to the multi-tab battery disclosed by the invention, the utilization rate of the shell space, the high-rate charge-discharge performance of the multi-tab battery and the use safety can be effectively improved.

The invention provides a fingerprint identification chip packaging structure and a packaging method. The packaging method comprises the steps that a substrate is provided; an induction chip is coupled at the surface of the substrate, the induction chip is provided with a first surface and a second surface which is opposite to the first surface, the first surface of the induction chip comprises induction areas, and the second surface of the induction chip is arranged at the surface of the substrate; and a plastic packaging layer is formed at the surfaces of the substrate and the partial induction chip, and the plastic packaging layer is exposed out of the induction areas. Sensitivity of the packaging structure of a fingerprint identification chip is enhanced, the packaging technology is simplified and manufacturing cost is reduced.

The invention relates to an electric vehicle battery pack electrical structure capable of achieving rapid charging. The electric vehicle battery pack electrical structure comprises a battery unit, a charging switch unit, a discharging switch unit, a direct-current bus unit, a vehicle-mounted charging unit and a direct-current rapid charging interface. Three charging switches and four discharging switches are all electrical switches. The electric vehicle battery pack electrical structure is characterized in that the battery unit is provided with two battery modules, the vehicle-mounted chargingunit is provided with two vehicle-mounted charging interfaces, and the direct-current bus unit is provided with two sets of direct-current buses; the discharging switches are turned off and the charging switches are turned on, thus the two battery modules are in series connection, and rapid charging is conducted through the direct-current rapid charging interface; the charging switches are turnedoff and the discharging switches are turned on, thus the two battery modules are discrete, and the two sets of direct-current buses conduct discharging independently (or in a common-ground mode or parallelly); and after a vehicle is parked, all the discharging switches and the charging switches are turned off, and the two battery modules can be charged slowly through the two vehicle-mounted charging interfaces. The electric vehicle battery pack electrical structure has the advantages of 1, series high-voltage rapid charging and discrete low-voltage safety discharging, and 2, electric energy redundancy and power supply redundancy, convenient driving of redundancy, and active equalization.

The invention discloses a method for the thermal control multilayer coating of an induction type magnetometer. The method includes manufacturing a polyimide bottom film, manufacturing multiple layers,pasting a black carburization film outside the multiple layers, installing grounding wires on the multiple layers, installing and fixing the polyimide bottom film, installing the multiple layers, performing insulation processing between adjacent multiple layers, and connecting the grounding wires of the multiple layers. According to the invention, the problem that a traditional method is difficult to carry out coating on a multilayer heat insulation material of a dendritic structure is solved, and the effect that the thermal control multilayer coating meets the requirements of heat insulation, insulation and equipotential of the induction type magnetometer product is achieved.

The invention discloses a combined screw. The combined screw is used for fixing a chip on a heat radiating base; one side surface of the chip is provided with a heat radiating sheet which is attached with the heat radiating base, and the chip is provided with a fixing hole penetrating through the heat radiating sheet. The combined screw comprises a head part, a rod part and an insulation layer, wherein the insulation layer is arranged on the outer wall of one end, near the head part, of the rod part in a coating manner. When the combined screw penetrates through the fixing hole to fix the chip on the heat radiating base, the insulation layer is positioned between the heat radiating sheet and the rod part. The combined screw has the beneficial effects that by adopting the structure of the insulation layer arranged on the outer wall of one end, near the head part, of the rod part in a coating manner, the electric insulation between the combined screw and the heat radiating sheet is realized, and a longer creepage distance is realized; the structure is simple; when the chip is assembled with a thread connection method, the operation is easy and convenient, and the automatic production is favorably realized.

The invention provides a thermoelectric generation device for a vehicle. The device comprises a box arranged on an exhaust pipeline of the vehicle, multiple hollow pipes arranged in the box in parallel, and a thermoelectric device arranged on the pipes in a sleeved mode and of an annular structure, wherein the box is provided with an air inlet and an air outlet, tail gas from an engine flows into the air inlet and is exhausted from the air outlet, and the distribution direction of the pipes is vertical to the airflow direction in the box. The thermoelectric generation device is simple in structure, compact in size and high in heat utilization rate, the structure of the bottom of the vehicle is kept as much as possible, and waste heat of the tail gas of the vehicle can be converted into electricity more effectively.

The invention discloses a high-density self-insulating flexible microneedle electrode and a preparation method thereof. An existing flexible cerebral cortex electrode has the problems of low stimulation and recording spatial resolution and incapability of being implanted into the cortex. In addition, the existing hesitant electrode or similar hesitant electrode also has the problems of complex preparation process and high cost. The flexible microneedle electrode comprises a lower insulating layer, an SU-8 boss arranged on the lower insulating layer, and metal conductive pads, metal wires and a flexible microneedle electrode array which are arranged on the SU-8 boss. The longitudinal sections of different positions of the SU-8 boss are inverted trapezoidal. The plurality of metal conductive pads, the plurality of metal wires and the flexible microneedle electrode array are all arranged on the SU-8 boss. By using the microneedle structure, the electrode points of the microneedle electrode array can penetrate into the tissue to realize stimulation and recording with high temporal-spatial resolution. The preparation method has the advantages of simple preparation process and low cost, and also has excellent mechanical matching performance.

The invention belongs to the technical field of motors, and relates to an electrical insulation sealing structure of an oil-cooled permanent magnet motor and an assembly method. The electrical insulation sealing structure comprises two compression nuts (1), a metal flat gasket (2), a positioning backing plate (3), a slotted lead terminal (4), a positioning insulator (5), an O-shaped rubber ring (6) and an inner insulator (7). The electrical insulation sealing structure of the oil-cooled permanent magnet motor is applicable to a stator oil immersed high-speed permanent magnet motor, and the motor adopting the structure has the advantages of simple shell structure, small volume, light weight and good stator cooling effect; and the electrical insulation structure of the oil-cooled permanent magnet motor has a function of preventing a lead terminal from rotating, not only can realize the electrical insulation of a stator lead-out wire and the shell, but also can realize the good sealing ofcooling oil in a stator inner cavity.