4results about How to "Small capacity attenuation" patented technology

This utility model discloses a dual-battery charging and discharging circuit, including: a control module, a first switch module, a second switch module, a first battery, and a second battery; the control module is connected to the first battery and the second battery respectively, and is used to detect the voltage of the first battery and the second battery; the control module is also connected to the first switch module and the second switch module respectively, and is used to control the conduction and cutoff of the first switch module and the second switch module according to the voltage difference between the first battery and the second battery, so as to realize the switching of charging and discharging modes. In the discharging mode, the high-voltage battery is given priority to be powered or the batteries are connected in parallel to be powered; in the charging mode, the low-voltage battery is given priority to be charged or the batteries are connected in parallel to be charged.

The application relates to a polyionic liquid binder suitable for vulcanized polyacrylonitrile and a preparation method and application thereof, which is obtained by carrying out an alkylation reaction and a polymerization reaction on bromo-n-butane and 1-vinylimidazole, and then carrying out an anion exchange reaction on lithium bis(trifluoromethylsulfonyl) imide and sodium anthraquinone-2-sulfonate. The polyionic liquid binder can anchor polysulfide on the polymer chain through the electrostatic interaction between the lone pair electrons in the molecular chain and the polysulfide, effectively inhibits the shuttle effect, contains a quinoid structure which can act as a redox medium to accelerate the electron transfer process and improve the interface kinetic performance of the SPAN positive electrode, has excellent bonding performance and mechanical strength, can significantly improve the structural integrity and electronic conduction continuity of the electrode in the cycle process, and prolongs the cycle life of the electrode. The obtained binder can be widely applied to SPAN-based positive electrodes of lithium ion batteries and provides effective technical support for solving key problems such as volume expansion and poor conductivity of SPAN materials.

The utility model provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a box body, single batteries and a heat exchange part, the single batteries and the heat exchange part are both located in the containing cavity, the heat exchange part comprises a heat exchange plate and a bottom plate, a heat exchange channel is formed between the heat exchange plate and the bottom plate, and the heat exchange channel comprises a first heat exchange channel located in a first area and a second heat exchange channel located in a second area; the cross sectional area of at least part of the first heat exchange channels is different from that of the second heat exchange channels, the heat exchange piece further comprises protruding parts, and the protruding parts are located on the first heat exchange channels and connected with at least one of the heat exchange plate and the bottom plate. The cross sectional areas of the first heat exchange channel and the second heat exchange channel are different, and the flows of the heat exchange medium in the first area and the second area are different, so that different heat management can be realized for the battery monomers with different temperatures, the temperature difference between the battery monomers is reduced, the temperature balance of the battery monomers is improved, and the stability of the battery device is improved.