45results about How to "Fast cold start" patented technology

The invention provides a low-temperature cold-start fuel cell system. The system comprises a fuel cell system, a low-temperature cold-start heating apparatus, a fuel cell control system and a power utilization terminal. The fuel cell system is connected with the low-temperature cold-start heating apparatus, the fuel cell control system and the power utilization terminal. The fuel cell control system comprises a control board and a control power supply. The system not only can accelerate low-temperature cold start of a fuel cell but also ensures safety use of an electric pile and avoids destruction of a core component, namely, a membrane electrode of the electric pile; and meanwhile, a mode is convenient to operate and control.

The invention relates to a bipolar plate structure of a proton exchange membrane fuel cell, a fuel cell stack and a control method thereof, and belongs to the technical field of proton exchange membrane fuel cells. By use of an air cooling and liquid cooling integration bipolar plate, an auxiliary cooling system is simplified, and the uniformity of temperature distribution in the stack is improved; meanwhile, quick cold starting under a low temperature condition is easy to realize; by introduction of graphene into a bipolar plate material, the conductivity of the bipolar plate can be improved;a runner of a cathode plate flow field adopts a periodical gradual-change section, so that oxygen partial pressure on the surface of a three-phase reaction region can be increased; a porous gas diffusion layer has the gradient dewatering capacity in the gas flowing direction, so that the stability of the fuel cell stack is improved; a cathode reinforcing layer of a porous meshed structure is relatively high in intensity, relatively high in conductivity and excellent in corrosion resistance; the power and the stability of the stack are improved, and the service life of the stack is prolonged.

The invention relates to a system for controlling an engine cooling circulation system; the system comprises a main control unit, a detection mechanism and an actuating mechanism, wherein the main control unit is taken as a control center, and a corresponding program is stored in the main control unit; the detection mechanism is used for detecting vehicle signals and transmitting the detected information into the main control unit connected with a signal output end of the detection mechanism in real time; and the actuating mechanism is used for executing a control command, receiving control signals which are sent out by the main control unit connected with the actuating mechanism and correspondingly controlling the cooling circulation system. The invention also relates to a method for controlling the engine cooling circulation system. The control system and the control method are simple, and can be used for controlling the cooling liquid circulation path according to the different running conditions of an engine, thus guaranteeing the engine to run well and reducing the energy consumption and the emission of the engine; and furthermore, after the engine stops, an electronic auxiliary water pump can be continuously used for cooling the cooling liquid effectively, so that the service life of a booster is prolonged. The system and the method are suitable for various vehicle engines.

The invention provides a rapid assisted positioning method for a GPS (global positioning system) on a portable mobile platform. The method includes the steps: firstly, arranging a WIFI (wireless fidelity) base band and a GSM (global system for mobile communications) base band on the portable mobile platform; secondly, reporting fuzzy position information provided by the WIFI base band and the GSM base band to a fuzzy adaptation layer; screening priority levels by the aid of the fuzzy adaptation layer; and transmitting data to a network satellite database by the aid of a map engine and precisely setting data parameters needed by the GPS after satellite parameter matching to realize rapid assisted positioning with the double base bands. Without increasing hardware cost, cold boot for the GPS is realized, a portable mobile device can be rapidly positioned indoors, and positioning precision is high.

The invention belongs to the field of methanol engine cold start, and discloses a multi-stage injection methanol engine cold start device and method. The device comprises a methanol evaporation and cracking module and a methanol multi-stage injection and ignition module, the methanol evaporation and cracking module comprises a first air inlet passage, a combustion chamber, an evaporation and cracking chamber and an exhaust pipe which are sequentially connected, and the methanol multi-stage injection and ignition module comprises a methanol box, a methanol high-pressure oil rail, a methanol pump, a first-stage methanol injector, a second-stage methanol injector, a sparking plug and a controller. The invention further discloses a multi-stage injection methanol engine cold start method. Methanol cracking gas can be prepared under the condition of low ambient temperature by multi-stage methanol injection and single ignition under the condition of cold start, and the methanol cracking gas and the uncracked methanol gas are introduced into an engine together to realize rapid cold start of the pure methanol engine. The device has the advantages of being high in stability, low in electricity consumption and easy to produce in an industrialized mode.

The invention discloses a fuel cell cold start device and a control method, and belongs to the technical field of automobiles. The device comprises a first circulating pump, a first heat exchanger anda first electric heating mechanism which are sequentially connected through pipelines to form a first circulating loop, and a second circulating pump, a second heat exchanger and a second electric heating mechanism which are sequentially connected through pipelines to form a second circulating loop. The first heat exchanger can heat a power cell, and the second heat exchanger can heat a fuel cell. The device also comprises a system controller and a power motor. The system controller is electrically connected with the fuel cell, the power cell, the first circulating pump, the first electric heating mechanism, the second circulating pump, the second electric heating mechanism and the power motor. Compared with the prior art, under the condition that the temperature of the fuel cell is lowerthan zero DEG C, the fuel cell can work with high output power, the fuel cell is heated, freezing of water generated in the fuel cell is avoided, rapid cold start is achieved, and the performance ofthe whole vehicle is improved.

The invention discloses a hydrogen combustion heater of a fuel cell engine. The hydrogen combustion heater comprises a partition plate, an enhanced heat exchange device and a catalytic reactor, the enhanced heat exchange device and the catalytic reactor are arranged on the two sides of the partition plate respectively, the enhanced heat exchange device comprises a cooling water way, a catalyst covering layer is arranged between the partition plate and the catalytic reactor, and cooling liquid pipe valves and three-way connectors are arranged on the heat exchange device and the catalytic reactor respectively. The method for realizing low-temperature self-starting of the fuel cell engine comprises the following steps that: after receiving a starting signal, the engine self-checks the ambienttemperature; when the environment temperature ranges from -8 DEG C to -3 DEG C, a signal is sent to the cold start electromagnetic valve, and the hydrogen pipeline cold start electromagnetic valve isopened; hydrogen flows into the heater to be mixed with air to generate chemical reaction to generate heat, cooling water is heated, meanwhile, the cooling liquid control valve acts to disconnect theradiator assembly and an inlet of the deionizer branch, and the cooling liquid only flows through the heating device and is heated; and the heated cooling water heats an electric pile of the engine,so that rapid low-temperature cold start of the fuel cell engine is realized.

The invention provides a fluctuation type power input water electrolysis hydrogen production method and device. The method comprises the step of: distributing fluctuation type input power into electrolysis power and heat storage power, wherein the electrolysis power is used for providing electric energy for hydrogen production by electrolyzing water; and the heat storage power is converted into heat energy for providing starting energy for hydrogen production by electrolyzing water, so that the cold starting speed of hydrogen production by electrolyzing water is increased. According to the method, fluctuation type power is distributed into heat storage power, and the heat storage power is converted into heat energy for providing starting energy for hydrogen production by electrolyzing water, so that the cold starting speed of water electrolysis hydrogen production can be remarkably increased, the system cannot be stopped, frequent start and stop of the system caused by fluctuation typepower input are effectively avoided, the concentration change of hydrogen and oxygen cannot be affected, and the yield and quality of hydrogen and continuous and safe production are guaranteed.

The invention discloses a diesel engine and a flame glow plug thereof. The flame glow plug comprises a shell, an oil inlet nozzle, a flame cover, an electromagnetic induction heating element, an electromagnetic induction coil and an electrode; the electrode is arranged at the top end of the shell, and a cavity is formed in the bottom of the electrode; the oil inlet nozzle is fixedly installed on the outer side of the shell and communicates with the top of the cavity; the flame cover is fixedly connected with the bottom end of the shell and provided with a plurality of ventilation holes; the electromagnetic induction heating element is fixedly installed in the cavity, and the bottom end of the electromagnetic induction heating element protrudes out of the shell and extends into the flame cover; a gasification flow guide channel is formed between the shell and the electromagnetic induction heating element and is used for guiding, heating and gasifying diesel oil entering the cavity; theelectromagnetic induction coil is of a spiral structure, is installed in the gasification flow guide channel, is electrically connected with the electrode and is used for forming an electromagnetic field; and a mixed gas cavity is formed in the flame cover. The flame glow plug can guarantee normal cold start of the diesel engine under the extremely cold condition.

The invention relates to a multi-energy-source fuel cell vehicle thermal management system and a control method thereof. The fuel cell vehicle thermal management system comprises a fuel cell subsystem, a storage battery subsystem, a super capacitor subsystem, a heat exchange subsystem and a post-processing subsystem. The control method comprises the steps of detecting the output current and the output power of each energy source, the cooling liquid outlet temperature of each energy source and the heat required by a passenger compartment, and switching the control method of the heat managementsystem among an extremely cold mode, a small cycle, a medium cycle, a large cycle and an extremely hot mode according to the parameters. In each mode, the thermal management system controller realizesthe optimal efficiency of the whole power source part by controlling the flow of the cooling liquid passing through each subsystem, and the quick response of the whole power source part needs to be considered in a low-temperature environment, so that the economy of the fuel cell vehicle and the quick response performance in the low-temperature environment are improved.

The invention provides a quick starting method of a GPS (Global Position System) receiver and a cooperative GPS receiver system. The quick starting method comprises the following steps of: at the initial time of cold start, establishing a cooperative GPS positioning wireless network by a currently started GPS receiver and the other N-1 GPS receivers in a communication range of the currently started GPS receiver; assigning one of the N GPS receivers as a network main control machine; respectively assigning information search parameters for each GPS receiver by the network main control machine, respectively carrying out corresponding information search by each GPS receiver to report the research result to the network main control machine; gathering information by the network main control machine and then sending the gathered information to the GPS receiver in the current cold start; and entering a normal working state by the GPS receiver according to the gathered information. With the adoption of the quick starting method disclosed by the invention, the information searching time of the GPS receivers in a cold start process can be greatly reduced, so as to realize quick cold start.

The invention relates to a rapid cold start system and a rapid cold start method for a fuel cell. The system comprises a controller, and an air subsystem and a hydrogen subsystem which are respectively connected with an electric pile; the air subsystem comprises a back pressure valve, an air filter, an air compressor, an intercooler and an air inlet stop valve, wherein the air filter, the air compressor, the intercooler and the air inlet stop valve are sequentially connected. The air subsystem further comprises an air inlet adjusting valve, the air inlet adjusting valve is connected with the air filter and the air compressor, and the controller controls the air inlet adjusting valve. The method comprises the steps that the controller controls the opening degree of the air inlet adjusting valve, so the excess air coefficient is controlled to reduce the external output efficiency of the fuel cell; meanwhile, the compression ratio of the air compressor is adjusted, and the power consumption of the air compressor is increased to increase the air inlet temperature. Compared with the prior art, the method can achieve the rapid cold starting without auxiliary preheating and the success rate of cold starting.

The invention relates to a control method, device and equipment for engine starting. The method comprises steps as follows: when a starting request is received, current electric quantity of a batteryis acquired; whether the current electric quantity is larger than a first preset electric quantity threshold or not is judged; if the current electric quantity is larger than the first preset electricquantity threshold, temperature of a catalyst is acquired; whether the temperature of the catalyst is smaller than a first preset temperature threshold or not is judged; if the temperature of the catalyst is not smaller than the first preset temperature threshold, the engine is driven to rotate forwards to carry out fuel cut-off starting; if the temperature of the catalyst is smaller than the first preset temperature threshold, a heating tray is preheated; the engine is driven to rotate reversely, and the engine is heated through heat of the heating tray; after the engine is heated, the catalyst is heated; and when the temperature of the catalyst reaches the first preset temperature threshold, the engine is driven to rotate forwards to carry out fuel cut-off starting. According to the control method, device and equipment for the engine starting, fuel consumption and waste gas emission can be reduced, and the starting time can be shortened.

The invention provides a fuel cell heat balance gas-gas-gas three-phase heat exchange system. The system comprises a hydrogen conveying pipeline, a compressed air conveying pipeline, a deionized waterconveying pipeline and a fuel cell stack. The system is characterized by further comprising a heat exchange device which is arranged on the hydrogen conveying pipeline and the compressed air conveying pipeline and can realize heat exchange between the hydrogen conveying pipeline and the compressed air conveying pipeline. The temperature of hydrogen and the temperature of compressed air are detected through the hydrogen temperature sensor and the compressed air temperature sensor; a central processing unit receives and processes the signals to control a heat exchange fan of the heat exchange device, so that the temperature of the compressed air is reduced; a plurality of hydrogen capillary tubes and a plurality of air capillary tubes in the heat exchange device are in large-area contact with the heat exchange fins for heat transfer, so that the heat of the compressed air quickly compensates the temperature of the hydrogen, the temperature difference between the two is rapidly reduced,the normal service life of the battery is ensured, and the battery is not rapidly aged; and deionized water is heated by a compensation heater to realize rapid cold start of the system.

The invention discloses a proton exchange membrane fuel cell system with low-temperature storage and starting functions. The system comprises a galvanic pile of a proton exchange membrane fuel cell. An air inlet and a hydrogen inlet of the galvanic pile are communicated through an air circulating pump and a first electric heating wire by a pipeline, and an air outlet and a hydrogen outlet of the galvanic pile are communicated through a drying agent by a pipeline to form the closed circulation of the air circulating pump, the first electric heating wire, the galvanic pile and the drying agent. A water inlet and a water outlet of the galvanic pile are communicated through a first water pump and a small water tank with a second electric heating wire by a pipeline to form the closed circulation of the small water tank, the first water pump and the galvanic pile. The water inlet and water outlet of the galvanic pile are also communicated through a second water pump and a large water tank with a third electric heating wire by a pipeline to form the closed circulation of the large water tank, the second water pump and the galvanic pile. The top end of the large water tank is connected with the pipeline for controllably communicating with the atmosphere. The system can simultaneously realize the low-temperature storage and rapid low-temperature starting of the galvanic pile of the proton exchange membrane fuel cell, and equipment is simple and easy to operate.

The invention discloses a high-oxygen-content active fuel and a preparation method thereof. The active fuel comprises the following components in part by weight: 2 parts of each of three alcohols of which the carbon atom numbers form an arithmetic progression, 1 part of hydrogen peroxide, 0.2 part of coupling agent, a trace amount of industrial essence and 50 to 100 parts of fuel, wherein the high-oxygen-content active fuel contains 27.5 to 60 weight percent of the hydrogen peroxide; the pH value of the hydrogen peroxide is adjusted to be neutral by a trace amount of sodium tripolyphosphate and sodium hydroxide; and the coupling agent is vinyl silane. The preparation method of the fuel comprises the following steps of: first, stirring the three alcohols in a reaction kettle around which arare earth permanent magnet high-strength magnetic field is arranged in proportion at a high speed; then, adding the hydrogen peroxide into the reaction kettle in proportion and continuously stirringthe mixture at the high speed; next, standing the mixture to separate and remove the unmixed solution; later on, adding the fuel into the mixture and stirring the mixture at a low and medium speed; and finally, standing the mixture and separating the product out. In the product of the invention, the content of reactive oxygen species (ROS) exceeds 18,000 times, the energy conservation rate thereof can reach 10 to 50 percent and the environmental protection effect exceeds the European standard III.

The invention provides a novel fuel cell integrated system. The system comprises a support frame, an electric pile module, a hydrogen auxiliary system, an air auxiliary system and a cooling circulation system, the support frame is of a double-layer frame structure arranged up and down. The electric pile module is arranged on the upper layer of the support frame, the hydrogen auxiliary system, theair auxiliary system and the cooling circulation system are arranged on the lower layer of the support frame, the structure is simple, disassembly and assembly are convenient, the size is small, and the problem that an existing centralized fuel cell system is difficult to disassemble and assemble can be effectively solved.

The invention provides a low-temperature cold-start fuel cell system, comprising a fuel cell system, a low-temperature cold-start heating device, a fuel cell control system, and an electrical terminal; It is connected with the power consumption terminal; the fuel cell control system includes a control board and a control power supply. The system of the present invention can not only accelerate the cold start of the fuel cell at low temperature, but also ensure the safe use of the electric stack, avoid damage to the membrane electrode of the core element of the electric stack, and at the same time, the method is convenient for operation and control.

The invention discloses a plasma electrodeless xenon lamp which comprises a luminous body (11) which is connected to a lamp cap seat (5) through a bulb port (6). The luminous body (11) fixed on a support (10) is connected with a plasma magnetic control body (7). A magnetic control hood (9) covers the luminous body (11). A conductor (8) connected to the plasma magnetic control body (7) is arranged in the magnetic control hood (9). A glass lamp hood (12) fixedly connected to the plasma magnetic control body (7) is arranged outside the magnetic control hood (9). The plasma magnetic control body (7) is connected with a high-frequency plasma driver (3) through the lamp cap seat (5). A power supply input rectifying filtering circuit (17), a correction circuit (16), a high-frequency plasma generating circuit (15) and a power control CPU circuit (14) are sequentially arranged in the high-frequency plasma driver (3). The plasma electrodeless xenon lamp has the advantages of being free of pollution, low in energy consumption, long in service life, high in light efficiency, good in light color and adjustable in light ray.

The invention discloses a high-pressure oil rail assembly of an engine. The high-pressure oil rail assembly of the engine comprises a tubular oil rail. A mounting support and an oil inlet pipe are arranged on the oil rail. At least two pits which are concave inwards and downwards are formed in the side wall of the oil rail. Oil outlets are formed in the bottom surfaces of the pits. Oil sprayers which communicate with the oil outlets are arranged in the pits correspondingly. A heating device which stretches into the oil rail is arranged in the position, located beside each pit, of the side wall of the oil rail. Each heating device comprises a heating shell, wherein a PTC heating body is arranged in the heating shell, and the space between the PTC heating body and the heating shell is filled with a compression body which is formed by folding a metal wire. The high-pressure oil rail assembly of the engine is compact in appearance structure and can be arranged in an engine compartment conveniently; and in addition, the heating speed of fuel oil is high, and rapid starting of the engine in a low-temperature environment can be achieved.

The invention discloses a PEM electric pile with a cold start different-stage preheating mode, and a system. The PEM electric pile is divided into three assemblies by thermal isolation structures, wherein the first assembly comprises a bipolar plate and an MEA assembly; the second assembly comprises end plates, an insulating plate and a collector plate assembly; the third assembly comprises a cooling medium and a pipeline and equipment; the thermal isolation structures comprise a thermal isolation structure arranged on the inner wall of a fuel supply system, a thermal isolation structure arranged on the inner wall of a cooling medium circulation system, and a thermal isolation structure arranged on the inner wall of an oxidizing agent supply system and a thermal insulation plate; the end plates are positioned on the two sides of the electric pile, and inlet-outlet channels of the fuel supply system, the oxidizing agent supply system and cooling medium circulation system are formed in the end plates; the insulating plate is positioned between the end plates and the thermal insulation plate; a groove is formed in one side close to the thermal insulation plate, and the thermal insulation plate is placed in the groove; the thermal insulation plate is positioned in the insulating plate groove for isolating the first assembly and the second assembly; a groove is formed in one side close to the collector plate, and the collector plate is arranged in the groove; and the collector plate is embedded in the insulating plate groove.

The invention discloses a multi-constellation receiver cold start visible satellite searching method. The multi-constellation receiver cold start visible satellite searching method comprises steps that legitimate inference is carried out according to acquired captured visible satellites, and theoretically invisible satellites are eliminated, and therefore a searching range of residual satellites is reduced; four steps adopting different searching orders are designed: a first step of searching an initial satellite group, a second step of searching an edge satellite group, a third step of extending and shrinking the searching, a fourth step of searching the residual satellites. The minimal range of the residual satellites is determined quickly and reasonably, and under conditions with or without shielding, cold start time consumption is effectively reduced.

The invention discloses a passenger car fuel cell thermal management system and method. The thermal management system includes a controller, a fuel cell, an inlet temperature sensor, an outlet temperature sensor, a PTC heater, a warm air core, a first water pump, Electric control three-way valve, deionizer, radiator, second water pump and intercooler; the heat management method includes the heat management process in the shutdown mode of the fuel cell, the heat management process in the cold start mode, and the low power operation The thermal management process in the mode and the thermal management process in the high-power working mode. The invention can make the fuel cell start quickly and avoid the failure of the fuel cell cold start.

The present invention relates to a control method, device and device for starting an engine. The method includes: when a start request is received, obtaining the current power of a battery; judging whether the current power is greater than a first preset power threshold; The current power is greater than the first preset power threshold, and the temperature of the catalyst is obtained; it is judged whether the temperature of the catalyst is less than the first preset temperature threshold; if the temperature of the catalyst is not less than the first preset temperature threshold, The engine is driven to rotate forward for fuel-cut start; if the temperature of the catalyst is lower than the first preset temperature threshold, the heating plate is preheated; the engine is driven to reverse, and the engine is heated by the heat of the heating plate; When the heating of the engine is completed, the catalytic converter is heated; when the temperature of the catalytic converter reaches the first preset temperature threshold, the engine is driven to rotate forward for fuel-cut start; the present invention can reduce fuel consumption and exhaust emission, and shorten the start-up time.

The invention discloses a diesel engine and a flame glow plug thereof. The flame glow plug includes a shell, an oil inlet, a flame cover, an electromagnetic induction heating element, an electromagnetic induction coil, and an electrode; the top of the shell is provided with an electrode, and the bottom is provided with a cavity; the oil inlet is fixedly installed on the outside of the shell, And communicate with the top of the cavity; the flame cover is fixedly connected to the bottom end of the shell, and is provided with a plurality of ventilation holes; the electromagnetic induction heating element is fixedly installed in the cavity, and the bottom end protrudes from the shell and extends into the flame cover ; A gasification guide channel is formed between the shell and the electromagnetic induction heating element, and the gasification guide channel is used to conduct flow guide and heat gasification of the diesel oil entering the cavity; the electromagnetic induction coil has a spiral structure and is installed on the The gasification guide channel is electrically connected with the electrode to form an electromagnetic field; the inside of the flame cover forms a mixed gas chamber. The flame glow plug can ensure the normal cold start of the diesel engine under extremely cold conditions.

The invention relates to a fast low-temperature start-up method for a fuel cell system, which is used to quickly start the fuel cell system when the external temperature is detected to be lower than zero degrees Celsius, comprising the following steps: S1) Open the hydrogen subsystem and feed the fuel cell stack Hydrogen; S2) Start the DCDC controller, and set the first starting current; S3) Open the air subsystem, and feed air into the fuel cell stack; S4) The fuel cell starts to generate electricity, and the output current increases to the first starting current; S5) Continue to load until the fuel cell reaches 50% of the rated output power, and complete fast low-temperature start-up. Compared with the prior art, the present invention has the advantages of simple operation and shortened low-temperature start-up time of the fuel cell system.

The invention belongs to the technical field of energy saving and emission reduction of automobile engines, and discloses an engine control system and an engine control method. The engine control system includes: interconnected oil pan, oil pump, oil cooler, oil filter and oil insulation box, an oil heating device is arranged in the oil insulation box, and the oil insulation box is a hemispherical structure; interconnected The engine, water pump, radiator and cooling water insulation box are equipped with a cooling water heating device in the cooling water insulation box, and an arc-shaped accommodation groove is arranged on the cooling water insulation box. The arc-shaped accommodation groove is used to accommodate the oil insulation box. A gap is sealed between the oil insulation box and the cooling water insulation box; the medium collector is used to accommodate the heat transfer medium and can selectively fill the gap with the heat transfer medium for heat transfer between the cooling water insulation box and the oil insulation box and isolated. The engine control system increases the temperature of engine oil and cooling water and shortens the start-up time to meet the needs of energy saving.

The invention belongs to the field of methanol engine cold start, and discloses a multi-stage injection methanol engine cold start device and method. The device comprises a methanol evaporation and cracking module and a methanol multi-stage injection and ignition module, the methanol evaporation and cracking module comprises a first air inlet passage, a combustion chamber, an evaporation and cracking chamber and an exhaust pipe which are sequentially connected, and the methanol multi-stage injection and ignition module comprises a methanol box, a methanol high-pressure oil rail, a methanol pump, a first-stage methanol injector, a second-stage methanol injector, a sparking plug and a controller. The invention further discloses a multi-stage injection methanol engine cold start method. Methanol cracking gas can be prepared under the condition of low ambient temperature by multi-stage methanol injection and single ignition under the condition of cold start, and the methanol cracking gas and the uncracked methanol gas are introduced into an engine together to realize rapid cold start of the pure methanol engine. The device has the advantages of being high in stability, low in electricity consumption and easy to produce in an industrialized mode.

A navigation satellite signal receiver and a cold start method therefor. The method comprises: receiving navigation message data of a plurality of satellites, performing bit synchronisation on the navigation message data, and storing the bit-synchronised navigation message data; performing frame synchronisation on the navigation message data, and after finishing frame synchronisation, acquiring a TOW and sub-frame number of a current sub-frame; determining a sub-frame number of a previous sub-frame according to the current sub-frame number, if the sub-frame number of the previous sub-frame is 1, 2 or 3, reversely searching navigation message data of the previous sub-frame to obtain partial ephemeris data, and storing same into an ephemeris storage area; continuously receiving the navigation message data, storing ephemeris data in the navigation message data into the ephemeris storage area, after obtaining complete ephemeris data of a first sub-frame, a second sub-frame and a third sub-frame, decoding the ephemeris data, and acquiring all ephemeris parameters; and after acquiring ephemeris parameters of a pre-set number of satellites, starting to perform positioning. The method achieves quick cold start of a navigation satellite signal receiver.