3results about How to "Improve resistance performance" patented technology

The utility model relates to the technical field of resistors, in particular to an electronic equipment resistor suitable for a wide temperature range. The resistor comprises a resistor body, supporting assemblies are movably connected to the positions, close to the two ends, of the bottom of the resistor body, and protection assemblies are arranged between the outer wall of the resistor body and the two supporting assemblies. Through collaborative design of the protection assembly and the supporting assembly, the reliability problem of a traditional winding resistor in a wide-temperature and vibration environment is solved. The protection assembly adopts an alloy spiral ring to wind a resistor body, a gap is reserved to buffer thermal expansion and cold contraction, and material oxidation and resistance drift are inhibited; the spiral structure and the gap form an elastic buffer space, vibration energy is absorbed, and welding spot stress concentration is avoided. The supporting assembly is movably connected with the bottom of the body through an L-shaped honeycomb supporting plate, disperses vibration stress, adapts to size changes and is in flexible connection with the end in cooperation with fine adjustment of screws, and structural stability is guaranteed.

The utility model discloses coil winding wire groove machining and welding integrated equipment which comprises a machine body, a groove machining device and a welding device arranged on one side of the groove machining device are arranged on the machine body, and the groove machining device comprises a groove clamping assembly used for clamping a wire to facilitate groove machining. The tool assembly is erected above the groove clamping assembly and used for conducting groove machining on the wire, and the welding device comprises a first welding clamping piece and a second welding clamping piece which are used for clamping the wire with the two groove faces attached to each other so as to facilitate welding. The integrated equipment disclosed by the utility model is tight in procedure connection, reduces the degree of manual intervention, and accurately guarantees the groove processing precision and the groove surface alignment stability, thereby greatly improving the processing efficiency and the welding quality of a winding wire, enhancing the consistency of the welding quality of a coil winding, improving the resistance performance of a coil, and reducing the production cost. And finally, a continuous and efficient production mode is achieved.

This invention relates to a single-particle positive electrode active material capable of exhibiting optimal battery performance, and also to a positive electrode and a lithium secondary battery comprising the positive electrode active material. The positive electrode active material comprises a lithium composite transition metal oxide having the composition shown in Formula 1 as described in this specification and being a single-particle form consisting of 10 or fewer primary particles, wherein the D0 of the primary particles obtained from SEM images... v,50 The particle size is 2.2 μm to 3.7 μm, and the proportion of small particles according to Equation 1 as described in this specification is 5% to 10%.