1results about How to "Increase friction factor" patented technology

The utility model relates to battery technical field, concretely relates to a double -layer sealing nut fastening cylindrical battery core. The utility model provides a double -layer sealing nut fastening cylindrical battery core, including the casing, the one end of casing is provided with through -hole, the one end of stud passes through the through -hole, and the stud is equipped with first sealing ring, the nut is equipped with second sealing ring in, and the nut can be connected with stud thread, the wedge washer is connected in the stud outside, along the axial direction of battery core, the wedge washer sets up between the nut and casing, and the wedge washer includes upper washer and lower washer, and the combined surface of upper washer, lower washer is provided with the wedge tooth that can adapt respectively, along the axial direction of battery core, the insulating washer sets up between the wedge washer and casing. The utility model can strengthen the structure stability after nut fastening, need not adopt laser welding to carry out fusion welding to the nut and stud, and the double -layer sealing ring inside and outside the casing can effectively guarantee the battery core sealing effect.