2results about How to "Lighten up with" patented technology

The invention discloses ternary precursor preparation ingredient solution filtering equipment, which comprises a filtering kettle body, a feeding pipe, a discharging pipe, an upper cover, a mesh basket and a filtering bag, and further comprises an inner and outer layer separation structure, the inner and outer layer separation structure comprises an inner guide pipe connected with the feeding pipe, the bottom of the inner guide pipe is connected with a sealing element, the sealing element is locked on the upper edge of the mesh basket, and the inner guide pipe is connected with the discharging pipe; a pressing seat is connected below the upper cover, and the horizontal part of the filter bag is pressed and fixed by the sealing piece and the pressing seat; matching rods are arranged on four outer edges of the filter bag, a connecting buckle is arranged in the center of the bottom of the filter bag, the bag body adjusting structure comprises four inner fixing pieces arranged on the inner side of the mesh basket, a matching plate fixedly connected to the connecting buckle is arranged at the bottom of the mesh basket, and a tensioning piece is arranged on the side, away from the connecting buckle, of the matching plate. According to the invention, the filter bag can be uniformly attached to the metal net basket, so that the pressure at each position is balanced, and the phenomenon of pressure misjudgment is not easy to occur.

This application relates to the photovoltaic field. Embodiments of this application provide a back-contact battery, a back-contact tandem battery, and a photovoltaic module. The back-contact battery's grid includes a first grid and a second grid. The first grid is connected to an edge grid line, and the second grid is spaced apart from the edge grid line. The second grid includes at least a first sub-grid, a second sub-grid, and a third sub-grid. Along a second direction, the length of the second sub-grid is greater than the length of the first sub-grid and less than the length of the third sub-grid. The vertical distances L1 between the first sub-grid and the chamfered edge, L2 between the second sub-grid and the chamfered edge, and L3 between the third sub-grid and the second edge are all 0.8mm to 1.2mm. The chamfered edge can disperse stress in the edge region of the battery, improve the battery's mechanical strength, and reduce defect areas. The chamfered edge structure combined with the arrangement of the second grid improves the electrical reliability of the edge region of the back-contact battery, thereby enhancing the photoelectric conversion efficiency of the back-contact battery.