3results about How to "High conductivity" patented technology

This application discloses a chassis for an on-board charger and the on-board charger itself. The chassis includes a first outer shell and a second outer shell, which together form a receiving space. The first outer shell has a top wall and an annular rim, which extends from the outer edge of the top wall toward the second outer shell to enclose at least a portion of the side wall of the second outer shell. At least one fastener is provided in a first area of ​​the side wall of the second outer shell enclosed by the annular rim. According to the embodiment of this application, the chassis of the on-board charger can provide better shielding against electromagnetic radiation, improving the electromagnetic compatibility of the chassis.

The invention relates to the technical field of carbon material preparation and modification, in particular to a preparation method of conductive carbon black with high specific surface area. The preparation method provided by the invention comprises the following steps: under a protective atmosphere, heating a raw material carbon black to 350-550 DEG C for first heat treatment, then heating to 800-950 DEG C for second heat treatment, and continuously heating to 1300-1600 DEG C for third heat treatment to obtain intermediate carbon black; sequentially carrying out water vapor activation and carbon dioxide activation on the intermediate carbon black to obtain the conductive carbon black with high specific surface area, the temperature of water vapor activation is 850 to 950 DEG C; the activation temperature of the carbon dioxide is 900 to 1000 DEG C. Impurities are removed through gradient heat treatment, a carbon skeleton is rearranged, and then water vapor and CO2 physical activation are utilized to cooperatively regulate and control micropore and mesoporous structures, so that the high specific surface area and the high conductivity are taken into account.

The invention provides a secondary battery and electric equipment. The secondary battery comprises a positive pole piece, a diaphragm and a negative pole piece, the negative pole piece comprises a negative current collector and a negative active layer arranged on at least one side surface of the negative current collector, and the negative active layer comprises a negative active material, a binder and a conductive agent; the negative electrode active material comprises graphite, the binder comprises gel modified styrene-butadiene rubber, the gel of the gel modified styrene-butadiene rubber comprises a polyacrylic acid chain segment, a polyethylene oxide chain segment, a poly (N-isopropylacrylamide) chain segment and a polyvinyl alcohol chain segment, and the effective ion transmission efficiency of the graphite is defined and screened, so that the effective ion transmission efficiency of the graphite is improved. And in combination with the binder, the electrolyte absorption and retention capability of the pole piece can be improved, the ionic conductivity can be improved, the diffusion impedance of ions can be reduced, the dynamics can be improved, and the cycle performance of the secondary battery can be improved.