6results about How to "Stable electrical contact" patented technology

The invention provides an electrical parameter measuring device and method for a rock and soil sample. The device comprises a device base, a horizontal holder assembly, a pressure assembly, an AB power supply electrode assembly, a top end M and N spring electrode assembly, a lateral MN probe electrode assembly and an electrical parameter measuring module. Two horizontal clamp assemblies are symmetrically arranged on the left side and the right side of the device base, pressure assemblies are installed on the horizontal clamp assemblies and abut against the AB power supply electrode set, the top end M and N spring electrode assemblies are installed at the two ends of the middle of the device base and stretch across the device base, and the lateral MN probe electrode assembly is installed on the rear side of the device base. And the electrical parameter measuring module is connected with an electrode column on the device base. The technical problems that in a traditional method, clamping force is difficult to control, contact is poor, current distribution is uneven, the process is opaque, data cannot be post-processed and the like are solved, and universalization, high precision and repeatable measurement of rock and soil samples are achieved.

The application discloses a low-friction laminated lubricating structure for an electrical contact component and a preparation method thereof, relates to the technical field of lubricating material preparation, and comprises the following steps: preparing a GNs ethanol dispersion solution and a PFPE ethanol solution; preparing a substrate; and performing composite coating and polishing forming to prepare a GNs bottom layer and a PFPE top layer. The low-friction laminated lubricating structure for the electrical contact component and the preparation method thereof are adopted, a composite process of synchronous spin coating and polishing is adopted, a GNs solid lubricating bottom layer and a PFPE fluid lubricating top layer are sequentially constructed on the surface of the component, the synergistic lubricating effect of the two layers is realized, and the friction and wear are greatly reduced while the stable electrical contact performance is maintained.

The present application relates to the technical field of sodium ion battery negative electrode material, and specifically to modified hard carbon negative electrode material and its preparation method and application, the present application takes biomass waste oil tea shell as raw material, adopts sulfuric acid and phosphoric acid as dopant, carries out porosification and activation, obtains P, S double atom doping pre-carbonization porous carbon material after carbonization, takes tetraethyl orthosilicate as raw material to prepare nano SiO2 microspheres under catalysis, carries out carbonization after blending nano SiO2 microspheres and P, S double atom doping pre-carbonization porous carbon material, obtains modified hard carbon negative electrode material through pyrolysis reaction with magnesium powder at the same time of carbonization, the element doping in modified hard carbon negative electrode material provides more active sites for sodium ion storage, improves the theoretical capacity and conductivity of the material, and the nanoscale silicon powder reduces the pulverization phenomenon caused by volume expansion when silicon is used as the negative electrode material of sodium ion battery due to the special size effect, reduces the attenuation of battery capacity.

The invention discloses a method and system for testing electrodes of a flow battery, and the method comprises the following steps: S100: arranging a reference electrode and a plurality of sensing electrodes in or on the surface of a target electrode of the flow battery, the plurality of sensing electrodes being distributed in an array; an electric connecting lead of the sensing electrode and the reference electrode is led to the outside through a sealing structure on the side surface of the flow battery and is connected to multi-channel electrochemical measurement equipment; s200, carrying out charging and discharging operation on the flow battery, and synchronously collecting potential signals of each sensing electrode and the reference electrode; s300, according to the spatial position coordinates of the sensing electrodes on the target electrode, spatial interpolation processing is conducted on the signals collected in the step S200, and a spatial distribution diagram reflecting the operation state of the target electrode is generated. The technical scheme of the invention aims to further improve the test precision of the electrode performance.

This utility model discloses a high-heat-dissipation carbon brush holder for automotive generators, comprising a bearing plate, a heat-conducting plate, and a centrifugal impeller. The centrifugal impeller is rotatably mounted inside the heat-conducting plate, which is fixedly mounted on the bottom surface of the bearing plate. The heat-conducting plate has several heat-dissipating fins on its surface, with the top surfaces of the fins adhered to the bottom surface of the bearing plate. Several sleeves are fixedly mounted on the surface of the bearing plate, each sleeve having a carbon brush slidably fitted inside, and an elastic ring fitted onto the surface of the carbon brush. The surface of the bearing plate has air inlets and ventilation slots to guide airflow into the surface of the centrifugal impeller. The outer edges of the air inlets and sleeves have conical bevel structures, and the ventilation slots are evenly distributed circumferentially. The bearing plate and heat-conducting plate are made of metal with an insulating layer on their surfaces. This structure achieves efficient heat dissipation, adaptive adjustment, and electrical isolation during carbon brush operation, significantly improving the stability and reliability of the carbon brush holder under high-temperature and high-speed environments.

This utility model discloses an assembly platform for integrated coil winding and insulation testing, including a base plate. The top of the base plate is equipped with a power mechanism for providing power to the integrated coil winding, a fixing mechanism for fixing the integrated coil, a feeding mechanism for providing materials required for winding the integrated coil, and a transfer mechanism for transporting the wound integrated coil. The surface of the transfer mechanism is equipped with a detection mechanism for performing insulation testing on the surface of the integrated coil. This utility model achieves automatic adaptation of the coil's inner diameter by setting up an infrared ranging sensor and a dynamic feedback mechanism with a spring, combined with the fine-tuning function of a first electric slide rail. Compared with traditional clamp replacement methods, it can reduce specification switching time and eliminate axial offset errors caused by manual assembly.