Abstract: A coaxial electric connector includes primarily a dielectric shell and a housing unit which is in an arc shape. The dielectric shell is formed by extrusion formation based on the housing unit and defines an annular space, with a predetermined wall being formed with two fixing sections to define the arc according to the housing unit. Besides, a bottom of the dielectric shell is a dielectric base and an interior of the dielectric shell contains additionally a conductor, a position of which is fixed by the dielectric base. A conductor pin on the conductor, whereas, is extended outward from the dielectric base. Through wrapping of the dielectric shell, the housing unit increases roundness of the entire housing and decreases scratching on a surface of metal part, which occurs when manufacturing the products, thereby improving a yield rate and a service life of the products.

Abstract: A secondary battery end cap assembly is extruded integrally, is provided on a cap plate and corresponds to a first perforation and a second perforation of the cap plate. The first perforation corresponds to a gas seal part of the end cap assembly and a side of the gas seal part is extended with a safety valve corresponding to the second perforation to release gas pressure, preventing the battery from being overly recharged that an interior of the battery is too hot and pressure increases, allowing the battery to explode to cause danger. The safety valve is made by a non-metallic material. Hence, a secondary battery end cap assembly is extruded integrally to effectively reduce manufacturing time and improve production efficiency. Furthermore, as the safety valve is penetrated and embedded by extruding a non-metallic material, gas tightness is enhanced without being unriveted and welding problems.