Abstract: An anti-shading photovoltaic cell assembly and methods for making and using same. The assembly includes a cell layer with N cell strings connected in series. Each of the cell strings comprises M cell modules connected in series, and each of the cell modules comprises P solar cells connected in parallel. Each of the solar cells has a light-receiving surface, a rear surface, and a plurality of sides located between the light-receiving surface and the rear surface. The plurality of sides include a first side and an opposite second side. The first sides of the P solar cells in each of the cell modules are connected through a first solder ribbon, and the second sides of the P solar cells in each of the cell modules are connected through a second solder ribbon. Whereby, the light-receiving areas on front and back surfaces of the assembly are increased.

Abstract: An oil-mist-free and high-speed electric spindle of the present invention includes a shell, a stator and a rotator. Using a bearing provided on a bearing providing position of the shell, the stator and the rotor are separated by a gap and freely rotatably supported on the shell. A labyrinth sealing structure, which covers the bearing providing position, is provided on an outside of the bearing providing position. The labyrinth sealing structure has a channel which opens to an atmosphere. And a through-hole is provided on the shell, wherein one end of the through-hole opens to the shelter, and the other end of the through-hole is connected with the channel of the labyrinth sealing structure. And the bearing providing position is filled with a lubricating grease which is a total synthesis grease of polyurea that is mainly composed of a base oil and contains a nanometer anti-wear additive.

Abstract: An oil-mist-free and high-speed electric spindle is provided by the present invention, which is capable of avoiding an environmental pollution caused by oil mist, avoiding harming the physical health of an employee, and saving energy. The oil-mist-free and high-speed electric spindle of the present invention includes a shell, a stator and a rotator. Using a bearing provided on a bearing providing position of the shell, the stator and the rotor are separated by a gap and freely rotatably supported on the shell. A labyrinth sealing structure, which covers the bearing providing position, is provided on an outside of the bearing providing position. The labyrinth sealing structure has a channel which opens to an atmosphere. And a through-hole is provided on the shell, wherein one end of the through-hole opens to the shelter, and the other end of the through-hole is connected with the channel of the labyrinth sealing structure.