14results about How to "Achieve self-heating" patented technology

The utility model provides a heating control circuit and an electric two-wheeled vehicle. The heating control circuit comprises a pulse self-heating circuit and a first one-way conduction module. The first end of the pulse self-heating circuit is connected with the first pole of the battery module, the second end of the pulse self-heating circuit is connected with the second pole of the battery module, and the pulse self-heating circuit is used for enabling battery electric energy flowing out of the battery module to reversely flow to the battery module to form pulse current repeatedly entering and exiting the battery module; the input end of the first one-way conduction module is connected with the first end of the pulse self-heating circuit and the first pole of the battery module, and the output end of the first one-way conduction module is used for being connected with the first end of the load circuit; and the first one-way conduction module is used for allowing the pulse self-heating circuit to reversely flow battery electric energy to the capacitive load current and preventing the electric energy of the capacitive load current from flowing to the pulse self-heating circuit, so that the influence of the load circuit on the pulse self-heating circuit is reduced, the loss of the pulse self-heating circuit is reduced, and the heating efficiency of the pulse self-heating circuit is improved.

The present disclosure relates to a battery energy processing device and a vehicle. The device includes: an inverter, an energy storage element and a controller; the controller is used to: in a first preset state, control the inverter to charge and discharge the energy storage element and the battery to realize battery self-heating; in a second preset state, reuse the energy storage element and the inverter to form a voltage adaptation charging module, and control the inverter to charge the battery. In this way, in the first preset state, the energy storage element is used to realize battery self-heating, better maintain the battery temperature, ensure the vehicle driving ability, and the self-heating energy loss is small, the heat transfer is uniform, and the heating efficiency is high. In the second preset state, the battery energy processing device can also reuse the energy storage element and the inverter to form a voltage adaptation charging module, and control the inverter to charge the battery. That is, the battery charging and battery self-heating share a set of battery energy processing devices, realizing the multi-functional reuse of the battery energy processing device, saving component costs and volume space.

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 invention discloses a charging circuit of a battery and an electric vehicle. The charging circuit comprises the battery, a direct current charging interface, a switch tube combination circuit and a heating control contactor. The battery comprises a first part of battery cell and a second part of battery cell which are connected in series through a series 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 conducted and the switch tube combination circuit is configured to be a booster circuit, the switch tube combination circuit is used for charging the battery after boosting the direct current input from the direct current charging interface, and alternately controlling the first part of battery core to discharge and charge the second part of battery core at the same time. Or after the second part of battery cells are discharged, the first part of battery cells are charged. Self-heating of the battery is realized by utilizing internal resistance heating of the battery.

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 present invention provides a low-temperature start method for a water-cooled fuel cell stack based on optimal energy efficiency, which belongs to the technical field of new energy power generation. The minimum temperature required for the self-heating start of the stack, the maximum time limit, and the electronic load current density when the low-temperature start of the stack is successful are set, and the power supply of the electric heating wire is turned on and adjusted to the maximum power; the controlled variables, control variables, and constraints of the external auxiliary multi-constraint predictive controller are determined, and the power of the electric heating wire is adjusted in real time until the temperature of the stack reaches the minimum temperature required for the self-heating start, and the power is turned off; the controlled variables, control variables, and constraints of the self-heating multi-constraint predictive controller are determined, and the electronic load current density is adjusted in real time until the electronic load current density when the low-temperature start of the stack is successful is reached, and the low-temperature start is successful. The present invention controls the low-temperature start time of the stack within a safe range, is safe and reliable, and at the same time maximizes energy utilization, reduces costs, and realizes fast, stable, and energy-efficient water-cooled fuel cell low-temperature start control.

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 present invention relates to a wind speed sensor system and method based on fiber grating, including a pumping light source, a sensing light source, a circulator, a wavelength division multiplexer, a fiber sensing probe and a wavelength demodulation unit, wherein the pumping light source is used to generate pumping light to heat a doped optical fiber with the pumping light, and the sensing light source is used to generate sensing light; the circulator is used to transmit the sensing light and isolate the grating reflection signal; the wavelength division multiplexer is used to multiplex the pumping light and the sensing light into the doped optical fiber; the fiber sensing probe is used to transmit the pumping light to heat the doped optical fiber and sense the wind speed, and reflect the sensing signal and the reference signal; the wavelength demodulator is used to receive the sensing signal and the reference signal, and respectively calculate the center wavelength drift amount affected by the wind speed according to the first center wavelength of the sensing signal and the second center wavelength of the reference signal, and calculate the wind speed of the wind field based on the center wavelength drift amount. The present invention has a simple structure and low manufacturing cost.

The present invention relates to a battery bidirectional pulse charging and self-heating circuit and control method, comprising a charging and discharging circuit driven by a pulse width modulation signal and a charging circuit controlled by a charging control signal; the charging and discharging circuit driven by the pulse width modulation signal charges the battery pack when the pulse width modulation signal is at a high level, and discharges the battery pack when the pulse width modulation signal is at a low level; the charging circuit controlled by the charging control signal is turned off at low temperatures, so that the charging amount and the discharging amount of the battery pack in each pulse width modulation signal cycle are the same, and heat energy is generated inside the battery pack. The present invention can enable the battery pack to realize bidirectional pulse charging, and has the function of heating the battery pack by generating positive and negative pulse currents to the battery pack at low temperatures.

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.

The invention relates to the technical field of vehicles, in particular to a high-voltage charging system and method and an electric automobile, and the system comprises a charging port and a power battery; the electric drive assembly comprises an inverter and a motor, the inverter is connected into a connecting loop of the charging port and the power battery, and the motor is allowed to be connected with the charging port; the control assembly is used for controlling the electric drive assembly to be connected with the charging port in the charging process, and at least one of boosting, current rising and heating in the charging process is achieved through the electric drive assembly. Therefore, the problems that a current electric vehicle charging framework cannot be matched with a charging pile during actual charging, so that the vehicle cannot be charged, a low-voltage charging pile cannot charge a high-voltage vehicle, or when the high-voltage pile charges the low-voltage vehicle, the high-voltage pile is limited by a charging interface, and the maximum charging current cannot be achieved are solved.

The present invention relates to a control method for a battery self-heating system, the control method comprising: obtaining the rotor position of a permanent magnet synchronous motor; selecting at least three control points from preset space voltage vector points, wherein the control points include a space voltage vector closest to the magnetic pole spacing of the motor rotor; and determining multiple phase states of an inverter corresponding to the control points from a preset space voltage vector control table. Based on the control of the space voltage vector, the current circulation inside the three-phase winding of the motor is reduced, the bus current is increased, and thus the battery heating rate is increased.

The utility model relates to a heating device, a power supply system and electric equipment, and the heating device comprises a battery module which comprises a battery pack; the first end of the driving circuit is electrically connected with the battery module; the second end of the driving circuit is connected with the first pole of the battery pack or the second pole of the battery pack in a switchable manner through the switch module, so that the battery module and the driving circuit form a first heating loop; or enabling the battery module and the driving circuit to form a second heating loop; wherein the first heating loop and the second heating loop are used for self-heating of the battery pack. According to the heating device, self-heating can be achieved through the battery module and the driving circuit, an external heating device is not needed, and the heating cost can be reduced.