73results about How to "Reduced cold start time" patented technology

The invention discloses an Android-based mobile terminal cold-boot method and an Android-based mobile terminal cold-boot device. The method comprises the following steps of: in a fast cold-boot mode, after a power supply of a mobile terminal is cut off, backing data to be saved up to nonvolatile memory equipment in a standby state by using the mobile terminal, and powering the mobile terminal off; and after the mobile terminal is rebooted, recovering the data backed up in the nonvolatile memory equipment to a corresponding physical memory. The method and the device of the invention have the advantages of greatly shortening the cold-boot time of the mobile terminal and enabling the mobile terminal when rebooted to fast recover the data to a state in which the data is before the standby state.

The invention discloses a cold start method for a circulating fluidized bed boiler, sequentially comprising the following steps of: filling the main bed of a hearth with an inert bed material; carrying out a material level test for the bed material on the main bed; carrying out a fluidization test for the bed material on the main bed; lighting an oil gun at a critical fluidized air volume, and starting to heat the bed material; regulating the output of a primary air fan, heating the bed material at a solid bubble air volume, regulating the output of the oil gun, and heating the bed material up; when the temperature of the bed material reaches a coal feeding temperature, regulating the output of the primary air fan, and ensuring a primary air volume that is not lower than the critical fluidized air volume; and feeding coal into the hearth through a coal feeding port, and stopping the oil gun, thus finishing cold start for the combustion side of the boiler. The bed material is heated up in a static bed state through primary air with the solid bubble air volume; the air volume is low, so the cold start consumes low power and low fuel oil, and costs short time, and reasonable particle size distribution of the bed material can be realized; and the cold start method for the circulating fluidized bed boiler disclosed by the invention can ensure the safety of the boiler, reduce cold start time and obviously reduce energy consumption.

The invention relates to a minus 20 DEG C-quick start proton exchange membrane fuel cell system. The minus 20 DEG C-quick start proton exchange membrane fuel cell system comprises a cell system, a control console, an air inlet heating belt, an air inlet valve, an inner circulation switch, a water pump, an outer circulation heat sink, a water tank heater, a hydrogen inlet valve, an outer circulation switch, a water tank heating relay, a tee joint, an air humidifying tank, a humidifying tank switch and a water tank as well as a high-molecular polymer plate arranged between a galvanic pile end cell of the cell system and a galvanic pile end plate and an external direct-current power source connected on an output terminal of the cell system, wherein the control console is used for controlling the connection and disconnection of the external direct-current power source through an external direct-current power source controller. The minus 20 DEG C-quick start proton exchange membrane fuel cell system has the beneficial effects that the cold boot time of the cell can be obviously shortened, and the low-temperature property of the cell is increased; and the structure is simple, auxiliary units are few, the operation is simple, and the reliability is higher.

The invention discloses a satellite positioning method and device and a computer readable storage medium. The satellite positioning method comprises the steps of: obtaining forecast tracks of all thesatellites in a prior visible satellite table at the current moment according to a pre-stored history broadcast ephemeris and the prior visible satellite table; and carrying out positioning operationaccording to the forecast tracks of all the satellites in the prior visible satellite table at the current moment. Through above scheme, the cold starting time of GNNS receivers can be shortened without increasing the cost of the GNSS receivers.

The invention relates to a method for starting a proton exchange membrane fuel cell under a low-temperature state. A mixed gas is introduced to a positive electrode for catalytic pre-heating, a tail gas of the positive electrode is introduced to a negative electrode, so that the mixed gas which does not react generates catalytic reaction in the negative electrode, and the effect of simultaneouslyrising temperatures of the negative electrode and the positive electrode is achieved. The method is improved on the basis of a traditional catalytic cold-starting method, the negative electrode and the positive electrode can simultaneously generate catalytic reaction, heat is provided for the cell, low-temperature starting at -45 DEG C even a lower temperature range can be achieved, fuel can be fully utilized, the starting power consumption of the cell is reduced, and the low-temperature starting time is greatly reduced.

The invention relates to a device for starting a proton exchange membrane fuel cell at a temperature below zero degree, wherein a mixed gas is catalytically preheated at an anode, and tail gas of theanode is introduced into a cathode, so that an unreacted mixed gas is catalytically reacted at the cathode, and the effect of simultaneous heating of the cathode and the anode is realized. The invention is improved on the traditional catalytic cold start device, the cathode and the anode can simultaneously generate catalytic reaction and provide heat to the battery, which can realize low temperature start-up in the temperature range equal to -45 DEG C or below, fuel is fully utilized, the battery start-up power consumption is reduced and the low temperature start-up time is greatly reduced.

The invention provides a method for reducing the time of starting a gasoline engine at low temperature, which relates to the cold-start of the gasoline engine and aims to start the gasoline engine quickly in cold weather, prevent the engine being flooded and achieve environmental protection and energy conservation. The invention is characterized in that when the gasoline engine is started at low temperature, a control unit determines whether water temperature of the engine is lower than a set value or not through a sensor, if so, within a period from the time that the sensor detects a speed signal of the engine to the time that the engine rotates for two turns, the engine rotates and the control unit controls an oil atomizer not to atomize oil, after the engine idly runs for two turns, the oil are atomized, and the temperature of a cylinder is raised through the compression stroke and friction of the previous two turns, so that more gasoline can be evaporated; meanwhile, the control unit controls a spark plug to continuously ignite fire for two times so as to increase the chance of ignition; if not, the ignition and the oil injection directly enter normal oil injection and ignition for starting and enter the normal running state.

The invention provides a proton exchange membrane fuel cell low-temperature cold start box capable of realizing uniform heating and a control method of the proton exchange membrane fuel cell low-temperature cold start box. The proton exchange membrane fuel cell low-temperature cold start box structurally comprises: a proton exchange membrane fuel cell stack supporting box body, two ends of which need to be provided with end plates for fixing and bearing cells; two resistance plates arranged at the bottom of the supporting box body, wherein sliding grooves are formed in one ends of the two resistance plates and used for electrifying and heating the fuel cell stack; a movable electrode with a threaded hole, wherein one end of the movable electrode is supported in the sliding groove of the resistance plate, and the movable electrode is used for being connected with a power supply and can move; and a threaded rod, wherein one end of the threaded rod is connected with the motor, and the threaded rod is rotatable and can move the electrode matched with the threaded rod. The end, close to the pile end cover, of the resistance plate and the electrodes are connected with the two electrodesof the power source respectively to form a loop, and due to the fact that the electrodes are movable, a heating area can be changed. The method has the advantages that the temperature uniformity of the galvanic pile can be realized during cold start of the galvanic pile, and the energy consumption for heating is low.

The invention provides a low-temperature quick starting system and method for a fuel cell stack, and the system comprises a special low-temperature starting small circulation system which is composedof a low-temperature starting water tank, a low-temperature starting water pump, four valves and a heat exchange device, wherein the heat exchange device is connected between an outlet and an inlet ofa fuel cell stack cooling cavity in series. The starting method comprises the following steps: opening a valve I and a valve III, closing a valve II and a valve IV, starting a fuel cell, and activating and purging an electric pile; after completion, closing the valve I and the valve III, opening the valve II and the valve IV, starting the low-temperature starting water pump, starting the low-temperature starting special small circulation system, and entering low-temperature starting; after success, opening the valve I and the valve III, closing the valve II and the valve IV, stopping the low-temperature starting water pump, and performing the normal operation of the electric pile. The invention has the beneficial effects that the starting method is simple, practical and effective, the low-temperature starting time is shortened, the power output of low-temperature starting is improved, no external heating unit or extra energy consumption exists, and no damage is caused to the electricpile.

A partial pressure type oxygen sensor with a ceramic heater structure and a preparation method thereof relate to a partial pressure type oxygen sensor and a preparation method thereof. The invention is intended to solve a technical problem that an existing partial pressure type oxygen sensor has low heat transfer efficiency, a large heater volume, uneven thermal field distribution, and poor resistance to mechanical shock and vibration. The partial pressure type oxygen sensor with the ceramic heater structure in the invention includes a core body and a ceramic heater. The core body is placed ina through hole in the middle of the ceramic heater, a pore between the core body and the ceramic heater is filled with high-temperature sealing glass, and finally, the partial pressure type oxygen sensor with the ceramic heater structure is obtained through sintering molding. The partial pressure type oxygen sensor in the invention can improve mechanical shock resistance strength of the sensor, improve heat conduction efficiency, shorten a cold start time, and improve uniformity of thermal field distribution, has the advantages of high accuracy and high reliability, and can be used for oxygenconcentration detection in environments such as a closed environment and an atmospheric environment.

A heating apparatus for a fuel cell that includes heating units that extend in the stacking direction of a plurality of separators, in contact with upper ends and lower ends of air intake sides of the stacked separators.

The embodiment of the invention relates to the technical field of communication, and provides a satellite signal capturing device and method and a satellite navigation receiver. The method comprises the steps of inputting digital intermediate frequency data of all satellites in a satellite system to be captured into the satellite signal capturing device and processing into detection data and verification data; meanwhile, generating a local pseudo code of any target satellite and processing the local pseudo code into a detection pseudo code and a verification pseudo code; performing parallel detection on the detection data and the detection pseudo code through a detection unit to obtain a code phase maximum value and a Doppler maximum value; enabling a verification unit to verify the code phase maximum value and the Doppler maximum value according to the verification data and the verification pseudo code to obtain a capture result of the target satellite; and finally, uniformly reporting the capturing results of all satellites in the system to a central processing unit, so that the central processing unit tracks the successfully captured satellites. The capturing efficiency is greatly improved, and the cold start time of the system is shortened.

The invention provides a PEMFC cold start system with a nitrogen-doped and hydrogen-doped purging device, and a control method thereof. The system comprises a controller FCU, a PEMFC electric pile, an air system, a nitrogen system, a hydrogen system, a gas purging device, a gas mixing device and a temperature and humidity acquisition device, an anode and a cathode on the PEMFC electric pile are respectively connected with the temperature and humidity acquisition device; and the controller FCU is connected with the temperature and humidity acquisition device, the anode on the PEMFC electric pile is connected with the hydrogen system, the nitrogen system is connected with the hydrogen system, the nitrogen system and the hydrogen system are connected with the air systems, the gas mixing device is arranged on a pipeline between the air systems, and the nitrogen system is connected with the gas heating device. According to the PEMFC cold start system with the nitrogen-doped and hydrogen-doped purging device, and the control method thereof, the heating efficiency is high, the structure arrangement is compact, the PEMFC cold start system is suitable for low-temperature cold start operation in various environments, and the technology is mainly used for fuel cell automobiles.

The invention discloses a water electrolysis hydrogen production system with an electrolyte heating function, which comprises an electrolytic bath, a hydrogen tank and an oxygen tank connected with the electrolytic bath, a heat exchanger connected with the hydrogen tank and the oxygen tank, a cooling water inlet connected with the heat exchanger through a water inlet pipeline, a cooling water outlet connected with the heat exchanger through a water outlet pipeline, and a circulating pump arranged between the electrolytic bath and the heat exchanger, and the system is characterized by further comprising a heater which is respectively connected with the water inlet pipeline and the water outlet pipeline, and a temperature sensor is arranged in the heater. According to the water electrolysis hydrogen production system with the electrolyte heating function, the cold start time of hydrogen production equipment is greatly shortened, the time for producing qualified hydrogen by the hydrogen production equipment is shortened, and the energy consumption of the hydrogen production equipment is reduced.

The invention discloses a fuel cell thermal management system which comprises a cooling liquid circulation main path and a fuel cell connected in series in the cooling liquid circulation main path, and the fuel cell comprises a cell water inlet and a cell water outlet. A main circulating water pump and a first three-way reversing valve are sequentially arranged on the cooling liquid circulating main path in series in the direction from the battery water outlet to the battery water inlet, the first three-way reversing valve is further connected to the battery water inlet through a cold start bypass, and a heating device used for heating cooling liquid is arranged on the cold start bypass. According to the invention, the cold start bypass is arranged, and the heating device is used for heating the cooling liquid, so that the temperature of the fuel cell is rapidly increased, and the cold start time is shortened. The invention also discloses a fuel cell system comprising the fuel cell thermal management system.

A method for synchronizing voltages of a fuel cell vehicle may synchronize the voltages of high voltage components in real time regardless of the completion of vehicle start-up in order to improve performance and control precision within a full range of operable voltages. The method includes a default voltage synchronization step in which, when the fuel cell vehicle starts, the voltages of the high voltage components are corrected based on an offset value, stored in advance in multiple auxiliary controllers for controlling the high voltage components, and the corrected voltages are further corrected according to a default voltage synchronization command of a main controller; and a real-time voltage synchronization step in which, after the default voltage synchronization step, the main controller transmits a target offset value to the auxiliary controllers, and the auxiliary controllers correct the voltages based on the target offset value.

The invention provides an energy storage system and a self-heating method. The energy storage system comprises a first unit, a second unit and a control unit, wherein the first unit comprises a first power conversion system and a first battery system, and the second unit comprises a second power conversion system and a second battery system; and the control unit is used for controlling the first power conversion system and the second power conversion system to perform mutual charging, namely performing mutual charging on the first battery system and the second battery system. By mutually charging the first battery system and the second battery system, the first battery system and the second battery system can be heated by utilizing heating of resistors in the battery systems, so that the temperature of the battery systems can be rapidly increased to a temperature interval suitable for battery operation in a low-temperature state, and the low-temperature starting time of the battery systems is greatly shortened. Compared with the mode of heating the battery through an air conditioner or other external heating equipment, the mode of heating the battery system through mutual charging has the advantages of being high in temperature rise rate, high in heat efficiency, energy-saving and the like.

The embodiment of the invention provides a cold start method and device, electronic equipment and a computer storage medium, wherein the cold start method comprises the steps: receiving an applicationcold start instruction triggered by the version upgrading of an application; according to the instruction, obtaining first initialization task data in a current running version of the application andsecond initialization task data in an installation file for version upgrading; and performing cold start of the application by using the first initialization task data, and after the cold start succeeds, continuing to perform initialization of the application by using the second initialization task data. Through the embodiment of the invention, the cold start time of the application during installation and upgrading is greatly shortened, the running performance of the application during version upgrading is improved, and the use experience of a user is also effectively improved.

The invention provides a fuel cell engine shutdown purging system, a control method thereof and a fuel cell system. The purging system comprises a regulating valve, a hydrogen jet, a water diversion piece, a tail exhaust valve, a three-way valve, a hydrogen circulating device, an air outlet throttle valve and an air inlet throttle valve, an inlet I of the regulating valve is connected with a hydrogen source, an inlet II of the regulating valve is connected with a nitrogen source, an outlet of the regulating valve is connected with an inlet I of the hydrogen jet, an outlet of the hydrogen jet is communicated with an anode inlet of a galvanic pile, and an anode outlet of the galvanic pile is connected with an inlet of the water diversion piece; the outlet of the hydrogen circulating device is connected with the inlet of the three-way valve; the outlet of the three-way valve is connected with the inlet of the hydrogen spraying device; the outlet of the three-way valve is connected with the inlet of the air inlet throttle valve; the outlet of the air inlet throttle valve is connected with the cathode inlet of the electric pile; and an inlet of the air outlet throttle valve is connected with a cathode outlet of the electric pile. The cathode and the anode are purged by the same N2 gas source, so that formation of a hydrogen-oxygen interface is avoided.

The invention discloses a fuel cell low-temperature starting system and a control method, the fuel cell low-temperature starting system comprises a fuel cell stack, a thermal management controller, an air system and a cooling liquid circulation system, the thermal management controller is in communication connection with the air system and the cooling liquid circulation system respectively, and the air system and the cooling liquid circulation system are connected with the fuel cell stack respectively. The air system is connected with the cooling liquid circulating system; the cooling liquid circulating system comprises a water pump, a three-way electromagnetic valve, a phase change heat reservoir, a thermostat, a radiator and a temperature sensor; the air system comprises an air compressor, a three-way electromagnetic valve, an intercooler and a humidifier. Extra energy consumption required by preheating modes such as electric heating or hydrogen catalytic combustion and the like which are usually adopted by the fuel cell during low-temperature starting is avoided, the utilization rate of vehicle-mounted energy of a fuel cell automobile is improved, and the driving range of the fuel cell is prolonged; and meanwhile, the problem of icing of the catalyst layer in the low-temperature starting process is also relieved, and the durability of the membrane electrode of the fuel cell is improved.

The invention relates to an acquisition method for satellite signal carrier wave frequency. The method comprises the following steps: extracting data segments from sampled data of digital IF signals S(n)=Ae and dividing each segment into data blocks, wherein wif represents satellite signal carrier wave angular frequency; determining the phrase compensation sequence of compensation angular frequency wi; processing products of the extracted data segments and a phrase compensation sequence and acquiring the angular frequency of peaks in a frequency spectrum; determining a satellite signal carrier wave angular frequency wif according to a formula that Wif is equal to wpeak minus wi and setting a working frequency of a digital controllable oscillator of a corresponding signal channel of a GPS receiver to complete acquisition of satellite signal carrier wave frequency. The method can reduce the search time for carrier frequency and time for cold start, and can be widely used in satellite receiving systems.

The invention provides a compression combustion type methane engine combustion system which comprises a methane engine, a methane storer, a fuel supply system which provides a gasified methane fuel toa mixer, an igniter supply system which provides a dimethyl ether igniter to the mixer and the mixer which mixes the gasified methane fuel, the dimethyl ether igniter and air in proportion into mixedgas and inputs the mixed gas into the methane engine through an intake manifold. After compression combustion of the dimethyl ether ignite by compression combustion, the compression combustion type methane engine combustion system provided by the invention then ignites the gasified methane fuel, so that a problem that it is hard to cold-start the methane engine can be solved effectively. A nozzleon a conventional air cylinder can be replaced to play a role of granulating the methane fuel, so that the combustion effect and the utilization ratio of the methane fuel in the air cylinder are guaranteed. The invention further provides a control method of the compression combustion type methane engine combustion system.

The invention relates to the technical field of cold start of steam turbines, in particular to a cold start early warning system and method of a steam turbine, a storage medium and electronic equipment. The problems that a system adopted by an existing steam turbine in the prior art is low in intelligence and differentiation degree and has no targeted early warning method and measure are solved. The system comprises a parameter acquisition module for acquiring real-time parameters in the cold start process of the steam turbine, a database module for storing a simulation parameter threshold value, a similar unit parameter threshold value and an operation requirement parameter threshold value, and a judgment module for comparing the real-time parameters with three parameter threshold valuesof the database module at the same time and outputting comparison results, a warning module for giving an alarm to prompt normal or abnormal conditions according to the comparison result, and a suggestion module for suggesting parameter setting when abnormal conditions are prompted. The system is used for parameter monitoring and setting suggestions in the cold start process of the steam turbine,and the effects of shortening the cold start time of the steam turbine and being more intelligent and differentiated are achieved.