Abstract: A bearing ring of a rolling bearing may include ring sections, connecting pieces, and bolts. The bearing ring sections may be assembled in an annular shape, and each bearing ring section may include a connecting portion located on an axial end face of the bearing ring section and adjacent to a circumferential end face of the bearing ring section, and a fixing hole located on the connecting portion. Each connecting piece may comprise multiple through holes. When the bearing ring sections are assembled, each connecting piece is arranged on adjacent connecting portions of two adjacent bearing ring sections, such that the through holes of the connecting piece respectively correspond to the fixing holes. Each bolt may be inserted into the through hole of each connecting piece and the corresponding fixing hole of each bearing ring section to connect the bearing ring sections to each other.

Abstract: Disclosed are a method and apparatus for subzero start-up of a fuel cell. The method for the subzero start-up of the fuel cell includes: introducing a gas containing hydrogen having a mass percentage of 5% to 100% to a hydrogen electrode and an air electrode of the fuel cell (2) under a condition of minus 50° C. to 0° C.; applying a current or a voltage to the fuel cell (2), and utilizing ohmic heat generation, reaction heat, and concentration overpotential heat generation of the fuel cell (2) to raise the fuel cell (2) to a required temperature or to cause the fuel cell (2) to reach to a set time, so as to implement the subzero start-up of the fuel cell.

Abstract: Disclosed are a method and apparatus for subzero start-up of a fuel cell. The method for the subzero start-up of the fuel cell includes: introducing a gas containing hydrogen having a mass percentage of 5% to 100% to a hydrogen electrode and an air electrode of the fuel cell (2) under a condition of minus 50° C. to 0° C.; applying a current or a voltage to the fuel cell (2), and utilizing ohmic heat generation, reaction heat, and concentration overpotential heat generation of the fuel cell (2) to raise the fuel cell (2) to a required temperature or to cause the fuel cell (2) to reach to a set time, so as to implement the subzero start-up of the fuel cell.