5results about How to "Achieve self-heating" patented technology

This invention provides a photoresponsive, deformable liquid crystal polyurethane material containing cyanostilbene, its preparation method, and its applications, belonging to the field of intelligent polymer materials technology. This invention introduces cyanostilbene liquid crystal units into a polyurethane system via short-chain spacer groups. Utilizing the characteristics of cyanostilbene under ultraviolet light irradiation (requiring trans / cis isomerization), its photothermal effect, the stability of the cis isomer structure, and the ability of the cis isomer to lower the glass transition temperature of the polymer, as well as the strong coupling effect between the cyanostilbene liquid crystal units and the main chain, a photoresponsive, deformable liquid crystal polyurethane material with high mechanical properties, high processability, high deformation rate, large deformation degree, and strong photostress can be prepared. This photoresponsive, deformable liquid crystal polyurethane material has wide applications in fields such as micro-optically driven robots, artificial muscle flexible actuators, and 4D-printed programmable deformable structures.

The application discloses a pulse current-based crack-free heat treatment method for additive manufacturing of high-temperature alloy, and belongs to the technical field of heat treatment of additive manufacturing of high-temperature alloy. The application aims to solve the technical problem that nickel-based high-temperature alloy manufactured by additive manufacturing is prone to cracking during the heating process of stress relief heat treatment. The application directly heats the workpiece by using pulse current, and the average heating rate of the workpiece is not less than 100 DEG C / s by applying high-density pulse current, so that the superfast heating far exceeding traditional furnace heat treatment is realized, thereby the precipitation of harmful phase at the grain boundary during the heating process is inhibited, and the cracking problem in the stress relief heat treatment process is fundamentally avoided. The method is especially suitable for nickel-based high-temperature alloy such as IN738LC.

The application provides a fuel cell stack temperature estimation method, comprising the following steps: S1. collecting fuel cell system cold start related data; S2. establishing a discretized temperature model of a fuel cell stack; S3. obtaining experimental data, and establishing a water pump and coolant model; S4. identifying model parameters by using an IPSO algorithm; S5. generating an input data sequence, training an LSTM model, and estimating the temperature of the stack; and S6. further reducing the estimation error by using an unscented Kalman filter. The application estimates the temperature of the stack without affecting the operation performance of the stack and the system integration, and has good robustness to environmental temperature changes and current load mutations.

The invention discloses a self-heating type biomass pyrolysis-gasification poly-generation system and method, belongs to the technical field of biomass energy conversion, and aims to reduce energy consumption and improve the reaction rate of pyrolysis carbon gasification. According to the system, the combustor is selected as an external heat source, gasified gas and non-condensable gas generated in the pyrolysis process can be used as fuel of the combustor, heat energy is provided for the rotary kiln reactor and the gasifier reactor, self heat supply of the system is achieved, and energy consumption is remarkably reduced. The material guide plates are obliquely arranged downwards, and the material guide plates in the two rows of material guide plate groups are arranged in a staggered manner in the height direction of the reaction cavity of the gasification furnace, so that a wave-shaped reaction runner is formed in the reaction cavity of the gasification furnace, and the reaction time can be effectively prolonged; meanwhile, the arranged driving mechanism can drive the material guide plate to swing up and down around the hinged part at the upper end of the material guide plate, so that the gasification retention time of the pyrolytic carbon can be controlled, the pyrolytic carbon can be scattered and prevented from caking, the rapid and sufficient reaction of the pyrolytic carbon and the gasifying agent is promoted, and the gasification rate is increased.

The application discloses a charging circuit of a battery and an electric vehicle. The charging circuit comprises a battery, a direct-current charging interface, a switch tube combination circuit and a heating control contactor. The battery comprises a first part of battery cells and a second part of battery cells connected in series through a series connection node. The switch tube combination circuit is connected between the direct-current charging interface and the battery. The heating control contactor is connected between the switch tube combination circuit and the series connection node. When the heating control contactor is turned on and the switch tube combination circuit is configured as a boost circuit, the switch tube combination circuit is used for boosting direct-current power input from the direct-current charging interface to charge the battery, and alternately controls the first part of battery cells to discharge to charge the second part of battery cells or the second part of battery cells to discharge to charge the first part of battery cells. The self-heating of the battery is realized by utilizing the internal resistance heating of the battery.