Fuel cell vehicle starting thermal management control method and device and vehicle

Abstract

The invention provides a fuel cell vehicle starting thermal management control method and device and a vehicle. According to the method, when the temperature of cooling liquid is lower than a first temperature threshold value and the environment temperature is lower than a second temperature threshold value, a heater in a vehicle warm air circulation loop is controlled to heat warm air circulation water according to first heating power; a first water pump in a vehicle warm air circulation loop is controlled to circulate the heated warm air circulation water to a pipeline corresponding to the hydrogen circulation pump according to a preset rotating speed; when the temperature of the cooling liquid is larger than a third temperature threshold value, the heater is controlled to heat warm air circulating water according to second heating power; when the temperature of the cooling liquid is larger than a fourth temperature threshold value, the heater is controlled to stop heating the warm air circulating water; according to the method, before the vehicle is started, the hydrogen circulating pump is heated through heat in the vehicle warm air circulating loop, so that the heating duration of the hydrogen circulating pump is shortened, and the vehicle starting success rate in the extremely cold environment is increased.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell vehicle startup control, and in particular to a fuel cell vehicle startup thermal management control method, equipment and vehicle. Background Art

[0002] A fuel cell vehicle is a vehicle that uses electricity generated by a hydrogen fuel cell as its main power source. A hydrogen fuel cell uses hydrogen as fuel to undergo an electrochemical reaction with oxygen in the air to generate electricity. In this process, the water generated by the electrochemical reaction will seep from the cathode of the fuel cell to the anode. In fact, during vehicle driving and parking, a certain amount of moisture needs to be maintained inside the hydrogen fuel cell, which will cause residual moisture in the hydrogen circulation pump. In extremely cold environments, when a fuel cell vehicle is left for a long time after operation, the moisture left inside the hydrogen circulation pump will freeze, causing the hydrogen circulation pump to operate abnormally when the vehicle is started again, resulting in insufficient hydrogen supply to the fuel cell, and in severe cases, making it difficult to start the vehicle.

[0003] In order to solve the above problems, in the prior art, a heating device is usually arranged outside the hydrogen circulation pump, and the hydrogen circulation pump is heated by the heating device to solve the icing problem. However, the heating process takes a certain amount of time, which makes it difficult to meet the demand for timely use of the vehicle, and there is a problem of low vehicle start-up success rate. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a fuel cell vehicle startup thermal management control method, device and vehicle. The method can use the heat in the vehicle's warm air circulation loop to heat the hydrogen circulation pump before the vehicle starts, thereby reducing the heating time of the hydrogen circulation pump and improving the vehicle startup success rate in extremely cold environments.

[0005] In a first aspect, an embodiment of the present invention provides a method for controlling thermal management of starting a fuel cell vehicle, wherein the fuel cell vehicle at least comprises: a fuel cell system and a vehicle heating circulation circuit; a cooling circuit in the fuel cell system is connected to the vehicle heating circulation circuit via a three-way valve; a hydrogen circulation pipeline in the fuel cell system is connected to the vehicle heating circulation circuit via a built-in hydrogen circulation pump;

[0006] The method includes:

[0007] After the fuel cell vehicle receives the start command, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0008] If the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, after the main valve of the three-way valve is controlled to be closed, the heater in the vehicle's warm air circulation loop is controlled to heat the warm air circulation water according to the first heating power, and the first water pump in the vehicle's warm air circulation loop is controlled to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump at a preset speed;

[0009] After the fuel cell system is controlled to start up, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0010] When the coolant temperature is greater than a fourth temperature threshold, the heater is controlled to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0011] In one embodiment, after controlling the heater to heat the warm air circulating water according to the second heating power, the method further includes:

[0012] The second water pump in the cooling circuit is controlled to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

[0013] In one embodiment, the method further comprises:

[0014] If the coolant temperature is lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the main valve of the three-way valve is controlled to open, so that the cooling circuit is connected to the vehicle heating circulation circuit;

[0015] The fuel cell system is controlled to start up, and the second water pump in the cooling circuit is controlled to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

[0016] In one embodiment, the method further comprises:

[0017] If the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the main valve of the three-way valve is controlled to close, so that the cooling circuit is disconnected from the vehicle heating circulation circuit; and the fuel cell system is controlled to start up.

[0018] In one embodiment, the three-way valve includes: a first three-way valve and a second three-way valve; a bypass valve of the first three-way valve is connected to a bypass valve of the second three-way valve, one end of the main valve of the first three-way valve and the main valve of the second three-way valve are both connected to a cooling circuit; the other ends of the main valve of the first three-way valve and the main valve of the second three-way valve are both connected to a vehicle heating circulation circuit;

[0019] After the fuel cell vehicle receives the start-up instruction, after the step of respectively acquiring the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle, the method further includes:

[0020] If the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state;

[0021] Controlling a heater in a warm air circulation loop of the vehicle to heat warm air circulation water according to a first heating power, and controlling a first water pump in the warm air circulation loop of the vehicle to circulate the heated warm air circulation water to a pipeline corresponding to a hydrogen circulation pump according to a preset speed;

[0022] After the fuel cell system is controlled to start up, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0023] When the coolant temperature is greater than a fourth temperature threshold, the heater is controlled to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0024] In one embodiment, after controlling the heater to stop heating the warm air circulating water, the method further includes:

[0025] The bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in a closed state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in an open state.

[0026] In one embodiment, the method further comprises:

[0027] If the coolant temperature is lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold; the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in a closed state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in an open state;

[0028] The fuel cell system is controlled to start up, and the second water pump in the cooling circuit is controlled to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

[0029] In one embodiment, the method further comprises:

[0030] If the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state;

[0031] Control the fuel cell system to start up.

[0032] In a second aspect, an embodiment of the present invention further provides a fuel cell vehicle startup thermal management control device, wherein the fuel cell vehicle at least comprises: a fuel cell system and a vehicle heating circulation circuit; the cooling circuit in the fuel cell system is connected to the vehicle heating circulation circuit via a three-way valve; the hydrogen circulation pipeline in the fuel cell system is connected to the vehicle heating circulation circuit via a built-in hydrogen circulation pump;

[0033] The equipment includes:

[0034] A first control module, configured to obtain the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle after the fuel cell vehicle receives a start command;

[0035] A second control module is used for controlling the heater in the vehicle warm air circulation loop to heat the warm air circulation water according to the first heating power after the main valve of the three-way valve is closed if the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, and controlling the first water pump in the vehicle warm air circulation loop to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed;

[0036] A third control module is used to control the fuel cell system to obtain the coolant temperature in real time after starting up; when the coolant temperature is greater than a third temperature threshold, control the heater to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0037] The fourth control module is used to control the heater to stop heating the warm air circulating water when the coolant temperature is greater than a fourth temperature threshold; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0038] In a third aspect, an embodiment of the present invention further provides a vehicle, which, during a startup thermal management control process, adopts the startup thermal management control method for a fuel cell vehicle mentioned in the first aspect.

[0039] In a fourth aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the steps of the fuel cell vehicle startup thermal management control method provided in the first aspect.

[0040] In a fifth aspect, an embodiment of the present invention further provides a storage medium storing computer executable instructions. When the computer executable instructions are called and executed by a processor, the computer executable instructions prompt the processor to implement the steps of the fuel cell vehicle startup thermal management control method provided in the first aspect.

[0041] An embodiment of the present invention provides a fuel cell vehicle startup thermal management control method, device and vehicle, wherein the fuel cell vehicle at least includes: a fuel cell system and a vehicle warm air circulation loop; the cooling loop in the fuel cell system is connected to the vehicle warm air circulation loop via a three-way valve; the hydrogen circulation pipeline in the fuel cell system is connected to the vehicle warm air circulation loop via a built-in hydrogen circulation pump. After the fuel cell vehicle receives the start command, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are obtained respectively; if the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, after the main valve of the three-way valve is closed, the heater in the vehicle's warm air circulation circuit is controlled to heat the warm air circulation water according to the first heating power, and the first water pump in the vehicle's warm air circulation circuit is controlled to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to the preset speed; after the fuel cell system is controlled to start up, the coolant temperature is obtained in real time; when the coolant temperature is greater than the third temperature threshold, the heater is controlled to heat the warm air circulation water according to the second heating power; wherein the second heating power is less than the first heating power; the third temperature threshold is greater than the first temperature threshold; when the coolant temperature is greater than the fourth temperature threshold, the heater is controlled to stop heating the warm air circulation water; wherein the fourth temperature threshold is greater than the third temperature threshold. This method can use the heat in the vehicle's warm air circulation circuit to heat the hydrogen circulation pump before the vehicle is started, thereby reducing the heating time of the hydrogen circulation pump and improving the vehicle startup success rate in an extremely cold environment.

[0042] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A flowchart of a first fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0046] Figure 2 A schematic diagram of a thermal cycle structure of a first fuel cell vehicle provided by an embodiment of the present invention;

[0047] Figure 3 A flowchart of a second fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0048] Figure 4 A flowchart of a third fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0049] Figure 5 A flowchart of a fourth fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0050] Figure 6 A schematic diagram of a thermal cycle structure of a second fuel cell vehicle provided by an embodiment of the present invention;

[0051] Figure 7 A flowchart of a fifth fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0052] Figure 8 A flowchart of a sixth fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0053] Fig. 9 A flowchart of a seventh fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0054] Fig.10 A flowchart of an eighth fuel cell vehicle startup thermal management control method provided by an embodiment of the present invention;

[0055] Fig.11 A flow chart of thermal management control of a hydrogen circulation pump during a thermal management control method for starting a fuel cell vehicle provided by an embodiment of the present invention;

[0056] Fig.12 A schematic diagram of the structure of a fuel cell vehicle startup thermal management control device provided by an embodiment of the present invention;

[0057] Fig.13 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0058] icon:

[0059] 1210 - first control module; 1220 - second control module; 1230 - third control module; 1240 - fourth control module;

[0060] 101 - processor; 102 - memory; 103 - bus; 104 - communication interface. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] A fuel cell vehicle is a vehicle that uses electricity generated by a hydrogen fuel cell as its main power source. A hydrogen fuel cell uses hydrogen as fuel to undergo an electrochemical reaction with oxygen in the air to generate electricity. In this process, the water generated by the electrochemical reaction will seep from the cathode of the fuel cell to the anode. In fact, during vehicle driving and parking, a certain amount of moisture needs to be maintained inside the hydrogen fuel cell, which will cause residual moisture in the hydrogen circulation pump. In extremely cold environments, when a fuel cell vehicle is left for a long time after operation, the moisture left inside the hydrogen circulation pump will freeze, causing the hydrogen circulation pump to operate abnormally when the vehicle is started again, resulting in insufficient hydrogen supply to the fuel cell, and in severe cases, making it difficult to start the vehicle.

[0063] In view of the above problems, in the prior art, a heating device is usually arranged outside the hydrogen circulation pump, and the hydrogen circulation pump is heated by the heating device to solve the icing problem. However, the heating process takes a certain amount of time, which makes it difficult to meet the demand for timely use of the vehicle, and there is a problem of low vehicle startup success rate. Based on this, the present invention provides a fuel cell vehicle startup thermal management control method, device and vehicle. The method can use the heat in the vehicle warm air circulation loop to heat the hydrogen circulation pump before the vehicle starts, thereby reducing the heating time of the hydrogen circulation pump and improving the vehicle startup success rate in extremely cold environments.

[0064] To facilitate understanding of this embodiment, a fuel cell vehicle startup thermal management control method disclosed in an embodiment of the present invention is first described in detail. Figure 1 As shown, including:

[0065] Step S101 , after receiving a start-up instruction, the fuel cell vehicle obtains the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle respectively.

[0066] Step S102, if the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, after the main valve of the three-way valve is controlled to be closed, the heater in the vehicle warm air circulation loop is controlled to heat the warm air circulation water according to the first heating power, and the first water pump in the vehicle warm air circulation loop is controlled to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed;

[0067] Step S103, after the fuel cell system is powered on, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0068] Step S104, when the coolant temperature is greater than a fourth temperature threshold, controlling the heater to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0069] The start-up process of a fuel cell vehicle is triggered by a start command, which can be generated by the driver executing key start, button start, or network remote start. When the fuel cell vehicle receives the start command, it indicates that the vehicle is about to enter the start-up process. At this time, relevant temperature parameters are needed to determine whether the vehicle is in an extremely cold state. Figure 2 As shown, the fuel cell vehicle at least includes: a fuel cell system and a vehicle warm air circulation loop; the cooling loop in the fuel cell system is connected to the vehicle warm air circulation loop through a three-way valve; the hydrogen circulation pipeline in the fuel cell system is connected to the vehicle warm air circulation loop through a built-in hydrogen circulation pump. The cooling loop of the fuel cell obtains the coolant temperature through a built-in temperature sensor; and the ambient temperature of the fuel cell vehicle can be obtained by a temperature sensor set outside the vehicle, for example, the sensor can be set near the cooling fan of the cooling loop.

[0070] After obtaining the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle, the two temperatures are compared respectively. When the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, the fuel cell vehicle is considered to be in an extremely cold state. At this time, the main valve of the three-way valve is closed to separate the vehicle's warm air circulation circuit from the cooling circuit, and the warm air circulation water is controlled by the heater in the vehicle's warm air circulation circuit to heat the hydrogen circulation pump.

[0071] Specifically, the hydrogen circulation pump is arranged in the hydrogen circulation pipeline of the fuel cell system, and is also in contact with the vehicle warm air circulation loop. The ventilation path in the hydrogen circulation pump circulates hydrogen, and hydrogen can circulate in the hydrogen circulation pipeline driven by the hydrogen circulation pump. The vehicle warm air circulation loop is arranged in the heat dissipation path in the hydrogen circulation pump, and the heat exchange medium in the heat dissipation path is the same as that of the vehicle warm air circulation loop, and can be set to water. After the heater of the vehicle warm air circulation loop heats the warm air circulation water, the heat in the warm air circulation water is transferred to the hydrogen circulation pump through the water pump arranged in the loop, thereby heating the hydrogen circulation pump. At this time, the heater heats the warm air circulation water according to the first heating power, and usually the first heating power is the rated power of the heater.

[0072] After heating the hydrogen circulation pump, the fuel cell system is controlled to execute the startup process. The heat generated by the fuel cell during the power generation process is dissipated through the cooling water circuit, and the coolant temperature at this time will gradually rise. When the coolant temperature is greater than the third temperature threshold, it indicates that the heating demand for the hydrogen circulation pump can be met under the action of the heater, and the heating power of the heater can be reduced at this time. Specifically, the heater is controlled to heat the warm air circulating water according to the second heating power, and the second heating power is less than the first heating power. It is worth mentioning that the third temperature threshold is greater than the first temperature threshold.

[0073] Although the vehicle's warm air circulation circuit has reduced power, it still heats the hydrogen circulation pump, and the coolant temperature in the cooling circuit continues to rise. When the coolant temperature is greater than the fourth temperature threshold, the coolant temperature can fully meet the normal operation of the hydrogen circulation pump at the current ambient temperature. At this time, after the heater is controlled to stop heating the warm air circulation water, the hydrogen circulation pump can work normally at the current extremely cold temperature. It is worth mentioning that the fourth temperature threshold is greater than the third temperature threshold.

[0074] In one embodiment, Figure 3 The second fuel cell vehicle startup thermal management control method shown includes:

[0075] Step S301, after the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0076] Step S302, if the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, after the main valve of the three-way valve is controlled to be closed, the heater in the vehicle warm air circulation loop is controlled to heat the warm air circulation water according to the first heating power, and the first water pump in the vehicle warm air circulation loop is controlled to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed;

[0077] Step S303, after the fuel cell system is powered on, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0078] Step S304, controlling the second water pump in the cooling circuit to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed;

[0079] Step S305, when the coolant temperature is greater than a fourth temperature threshold, controlling the heater to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0080] The heat generated by the fuel cell during the power generation process is dissipated through the cooling water circuit, and the coolant temperature at this time will gradually rise. When the coolant temperature is greater than the third temperature threshold, it indicates that the heating demand for the hydrogen circulation pump can be met under the action of the heater. Since the coolant in the cooling circuit receives heat when the fuel cell is performing the power generation process, this heat can also be used to heat the hydrogen circulation pump. Therefore, by controlling the second water pump in the cooling circuit, the coolant is circulated to the pipeline corresponding to the hydrogen circulation pump at a preset speed, so that the vehicle warm air circulation circuit and the cooling circuit can jointly heat the hydrogen circulation pump.

[0081] In one embodiment, Figure 4 The third fuel cell vehicle startup thermal management control method shown includes:

[0082] Step S401, after the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0083] Step S402, if the coolant temperature is lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the main valve of the three-way valve is controlled to open so that the cooling circuit is connected to the vehicle heating circulation circuit;

[0084] Step S403, controlling the fuel cell system to start up, and controlling the second water pump in the cooling circuit to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

[0085] After obtaining the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle, the two temperatures are compared respectively. When the coolant temperature is lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the fuel cell vehicle is considered to be in a relatively cold state. At this time, the main valve of the three-way valve is controlled to open, so that the cooling circuit and the vehicle's warm air circulation circuit are interconnected. The fuel cell system is then controlled to start up, and the heat generated by the fuel cell during the power generation process is dissipated through the cooling water circuit. At this time, the coolant temperature will gradually rise and be used to heat the hydrogen circulation pump.

[0086] In one embodiment, Figure 5 The fourth fuel cell vehicle startup thermal management control method shown includes:

[0087] Step S501, after the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0088] Step S502, if the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the main valve of the three-way valve is controlled to close, so that the cooling circuit is disconnected from the vehicle heating circulation circuit; and the fuel cell system is controlled to start up.

[0089] When the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the fuel cell vehicle is considered to be in a normal temperature state, and the main valve of the three-way valve is closed, so that the cooling circuit is disconnected from the vehicle's warm air circulation circuit. At this time, the hydrogen circulation pump does not need to be heated additionally, so the vehicle's warm air circulation circuit does not need to perform heating-related processes, and the fuel cell system is started normally.

[0090] In one embodiment, Figure 6 From the schematic diagram of the heat cycle structure of the second fuel cell vehicle shown, it can be seen that the three-way valve includes: a first three-way valve and a second three-way valve; the bypass valve of the first three-way valve is connected to the bypass valve of the second three-way valve, and one end of the main valve of the first three-way valve and the main valve of the second three-way valve are both connected to the cooling circuit; the other ends of the main valve of the first three-way valve and the main valve of the second three-way valve are both connected to the vehicle heating circulation circuit. On this basis, the fuel cell vehicle startup thermal management control method is as follows Figure 7 As shown, including:

[0091] Step S701, after the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0092] Step S702, if the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state;

[0093] Step S703, controlling the heater in the vehicle warm air circulation loop to heat the warm air circulation water according to the first heating power, and controlling the first water pump in the vehicle warm air circulation loop to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed;

[0094] Step S704, after the fuel cell system is powered on, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0095] Step S705, when the coolant temperature is greater than a fourth temperature threshold, controlling the heater to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0096] When the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, the vehicle heating circulation circuit needs to be separated from the cooling circuit. At this time, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are controlled to be in an open state, so that the two are interconnected; and the main valve of the first three-way valve and the main valve of the second three-way valve are controlled to be in a closed state, so that the two three-way valves are separated from the cooling circuit.

[0097] In one embodiment, Figure 8 The sixth fuel cell vehicle startup thermal management control method shown includes:

[0098] Step S801, after the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0099] Step S802: if the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state;

[0100] Step S803, controlling the heater in the vehicle warm air circulation loop to heat the warm air circulation water according to the first heating power, and controlling the first water pump in the vehicle warm air circulation loop to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed;

[0101] Step S804, after the fuel cell system is powered on, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0102] Step S805, respectively controlling the bypass valve of the first three-way valve and the bypass valve of the second three-way valve to be in a closed state, and respectively controlling the main valve of the first three-way valve and the main valve of the second three-way valve to be in an open state;

[0103] Step S806, when the coolant temperature is greater than a fourth temperature threshold, control the heater to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0104] The heat generated by the fuel cell during the power generation process is dissipated through the cooling water circuit, and the coolant temperature at this time will gradually rise. When the coolant temperature is greater than the third temperature threshold, it indicates that the heating demand for the hydrogen circulation pump can be met under the action of the heater. Since the coolant in the cooling circuit receives heat when the fuel cell is performing the power generation process, this heat can also be used to heat the hydrogen circulation pump. Therefore, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in a closed state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in an open state, so that the vehicle warm air circulation circuit is connected with the cooling circuit, so that the vehicle warm air circulation circuit and the cooling circuit can heat the hydrogen circulation pump together.

[0105] In one embodiment, Fig. 9 The seventh fuel cell vehicle startup thermal management control method shown includes:

[0106] Step S901, after the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0107] Step S902, if the coolant temperature is lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold; the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in a closed state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in an open state;

[0108] Step S903, controlling the fuel cell system to start up, and controlling the second water pump in the cooling circuit to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

[0109] After obtaining the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle, the two temperatures are compared respectively. When the coolant temperature is lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, it is considered that the fuel cell vehicle is in a relatively cold state. At this time, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are controlled to be in a closed state, and the main valve of the first three-way valve and the main valve of the second three-way valve are controlled to be in an open state, so that the cooling circuit and the vehicle warm air circulation circuit are interconnected. The fuel cell system is then controlled to start up, and the heat generated by the fuel cell during the power generation process is dissipated through the cooling water circuit. At this time, the coolant temperature will gradually rise and be used to heat the hydrogen circulation pump.

[0110] In one embodiment, Fig.10 The eighth fuel cell vehicle startup thermal management control method shown includes:

[0111] Step S1001, after the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained;

[0112] Step S1002, if the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state;

[0113] Step S1003, controlling the fuel cell system to start up.

[0114] When the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the fuel cell vehicle is considered to be in a normal temperature state. At this time, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state, so that the cooling circuit is disconnected from the vehicle's warm air circulation circuit. At this time, the hydrogen circulation pump does not need to be additionally heated, so the vehicle's warm air circulation circuit does not need to perform heating-related processes, and the fuel cell system is normally started.

[0115] like Fig.11 It can be seen from the thermal management control flow chart of the hydrogen circulation pump during the thermal management control method for starting a fuel cell vehicle that when the hydrogen fuel cell vehicle is turned on, the ambient temperature and the fuel cell coolant temperature are first judged;

[0116] If the ambient temperature and the fuel cell coolant temperature are both greater than 0°C, the main valve of the three-way valve of the circulating water circuit that provides warm air for the vehicle is closed, the hydrogen circulation pump does not need additional heating, and the fuel cell system enters the normal startup process;

[0117] If the ambient temperature is less than 0°C and the fuel cell coolant temperature is greater than 0°C, the main valve of the three-way valve of the circulating water circuit that provides warm air for the vehicle opens, the fuel cell coolant is heated by the hydrogen circulation pump, and the fuel cell system enters the normal startup process;

[0118] If the ambient temperature and the fuel cell coolant temperature are both less than 0°C, the main valve of the three-way valve of the circulating water circuit that provides warm air for the vehicle is closed, the driver's warm air circulating water circuit is heated by the hydrogen circulating pump, and the fuel cell system enters the normal startup process. When the fuel cell coolant temperature is greater than the third threshold, the output power of the warm air circulating water circuit heater is reduced, and the warm air circulating water circuit and the fuel cell coolant are heated by the hydrogen circulating pump at the same time; when the fuel cell coolant temperature is greater than the fourth threshold, the warm air circulating water circuit heater stops heating, and the fuel cell coolant is heated by the hydrogen circulating pump.

[0119] It can be seen that the above-mentioned fuel cell vehicle startup thermal management control method provided by the embodiment of the present invention can use the heat in the vehicle's warm air circulation loop to heat the hydrogen circulation pump before the vehicle starts, thereby reducing the heating time of the hydrogen circulation pump and improving the vehicle startup success rate in extremely cold environments.

[0120] For the fuel cell vehicle startup thermal management control method provided in the above embodiment, an embodiment of the present invention provides a fuel cell vehicle startup thermal management control device, wherein the fuel cell vehicle at least comprises: a fuel cell system and a vehicle warm air circulation loop; the cooling loop in the fuel cell system is connected to the vehicle warm air circulation loop through a three-way valve; the hydrogen circulation pipeline in the fuel cell system is connected to the vehicle warm air circulation loop through a built-in hydrogen circulation pump;

[0121] The device Fig.12 As shown, including:

[0122] The first control module 1210 is used to obtain the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle after the fuel cell vehicle receives the start command;

[0123] The second control module 1220 is used for controlling the heater in the vehicle warm air circulation loop to heat the warm air circulation water according to the first heating power after the main valve of the three-way valve is closed if the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, and controlling the first water pump in the vehicle warm air circulation loop to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed;

[0124] The third control module 1230 is used to control the fuel cell system to obtain the coolant temperature in real time after starting up; when the coolant temperature is greater than a third temperature threshold, control the heater to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold;

[0125] The fourth control module 1240 is used to control the heater to stop heating the warm air circulating water when the coolant temperature is greater than a fourth temperature threshold; wherein the fourth temperature threshold is greater than the third temperature threshold.

[0126] The fuel cell vehicle startup thermal management control device provided in an embodiment of the present invention can use the heat in the vehicle's warm air circulation loop to heat the hydrogen circulation pump before the vehicle starts, thereby reducing the heating time of the hydrogen circulation pump and improving the vehicle startup success rate in extremely cold environments.

[0127] The fuel cell vehicle startup thermal management control method and device provided in the embodiment of the present invention has the same implementation principle and technical effects as those in the aforementioned fuel cell vehicle startup thermal management control method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference can be made to the corresponding contents in the aforementioned fuel cell vehicle startup thermal management control method embodiment.

[0128] This embodiment also provides a vehicle, which, during the startup thermal management control process, adopts the fuel cell vehicle startup thermal management control method mentioned in the above embodiment.

[0129] This embodiment also provides an electronic device. The structural diagram of the electronic device is as follows: Fig.13 As shown, the device includes a processor 101 and a memory 102; wherein the memory 102 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor to implement the steps of the above-mentioned fuel cell vehicle startup thermal management control method.

[0130] Fig.13 The electronic device shown further includes a bus 103 and a communication interface 104 , and the processor 101 , the communication interface 104 and the memory 102 are connected via the bus 103 .

[0131] The memory 102 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The bus 103 may be an ISA bus, a PCI bus, or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.13Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0132] The communication interface 104 is used to connect to at least one user terminal and other network units through a network interface, and send the encapsulated IPv4 message or IPv4 message to the user terminal through the network interface.

[0133] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 101. The above processor 101 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present disclosure can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present disclosure can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102 and completes the steps of the method of the above embodiment in combination with its hardware.

[0134] An embodiment of the present invention further provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the fuel cell vehicle startup thermal management control method in the aforementioned embodiment are executed.

[0135] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0136] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0137] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0138] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present invention can essentially or in other words, the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0139] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A fuel cell vehicle startup thermal management control method, characterized in that: The fuel cell vehicle at least comprises: a fuel cell system and a vehicle heating circulation circuit; the cooling circuit in the fuel cell system is connected to the vehicle heating circulation circuit via a three-way valve; the hydrogen circulation pipeline in the fuel cell system is connected to the vehicle heating circulation circuit via a built-in hydrogen circulation pump; The method comprises: After the fuel cell vehicle receives the start-up instruction, the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle are respectively obtained; If the coolant temperature is lower than the first temperature threshold and the ambient temperature is lower than the second temperature threshold, after controlling the main valve of the three-way valve to close, controlling the heater in the vehicle warm air circulation loop to heat the warm air circulation water according to the first heating power, and controlling the first water pump in the vehicle warm air circulation loop to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed; After the fuel cell system is controlled to start up, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold; When the coolant temperature is greater than a fourth temperature threshold, the heater is controlled to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

2. The fuel cell vehicle startup thermal management control method according to claim 1, characterized in that: After controlling the heater to heat the warm air circulating water according to the second heating power, the method further includes: The second water pump in the cooling circuit is controlled to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

3. The fuel cell vehicle startup thermal management control method according to claim 1, characterized in that: The method further comprises: If the coolant temperature is lower than a first temperature threshold and the ambient temperature is not lower than a second temperature threshold, the main valve of the three-way valve is controlled to open so that the cooling circuit is connected to the vehicle warm air circulation circuit; The fuel cell system is controlled to start up, and the second water pump in the cooling circuit is controlled to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

4. The fuel cell vehicle startup thermal management control method according to claim 1, characterized in that: The method further comprises: If the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the main valve of the three-way valve is controlled to close, so that the cooling circuit is disconnected from the vehicle warm air circulation circuit; and the fuel cell system is controlled to start up.

5. The fuel cell vehicle startup thermal management control method according to claim 1, characterized in that: The three-way valve comprises: a first three-way valve and a second three-way valve; a bypass valve of the first three-way valve is connected to a bypass valve of the second three-way valve, one end of the main valve of the first three-way valve and the main valve of the second three-way valve are both connected to the cooling circuit; the other ends of the main valve of the first three-way valve and the main valve of the second three-way valve are both connected to the vehicle heating circulation circuit; After the fuel cell vehicle receives the start-up instruction, after the step of respectively acquiring the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle, the method further includes: If the coolant temperature is lower than a first temperature threshold and the ambient temperature is lower than a second temperature threshold, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state; Controlling the heater in the vehicle warm air circulation loop to heat warm air circulation water according to a first heating power, and controlling the first water pump in the vehicle warm air circulation loop to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed; After the fuel cell system is controlled to start up, the coolant temperature is obtained in real time; when the coolant temperature is greater than a third temperature threshold, the heater is controlled to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold; When the coolant temperature is greater than a fourth temperature threshold, the heater is controlled to stop heating the warm air circulating water; wherein the fourth temperature threshold is greater than the third temperature threshold.

6. The fuel cell vehicle startup thermal management control method according to claim 5, characterized in that: After controlling the heater to stop heating the warm air circulating water, the method further includes: The bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in a closed state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in an open state.

7. The fuel cell vehicle startup thermal management control method according to claim 5, characterized in that: The method further comprises: If the coolant temperature is lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold; the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in a closed state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in an open state; The fuel cell system is controlled to start up, and the second water pump in the cooling circuit is controlled to circulate the coolant to the pipeline corresponding to the hydrogen circulation pump at a preset speed.

8. The fuel cell vehicle startup thermal management control method according to claim 5, characterized in that: The method further comprises: If the coolant temperature is not lower than the first temperature threshold and the ambient temperature is not lower than the second temperature threshold, the bypass valve of the first three-way valve and the bypass valve of the second three-way valve are respectively controlled to be in an open state, and the main valve of the first three-way valve and the main valve of the second three-way valve are respectively controlled to be in a closed state; The fuel cell system is controlled to start up.

9. A fuel cell vehicle startup thermal management control device, characterized in that: The fuel cell vehicle at least comprises: a fuel cell system and a vehicle heating circulation circuit; the cooling circuit in the fuel cell system is connected to the vehicle heating circulation circuit via a three-way valve; the hydrogen circulation pipeline in the fuel cell system is connected to the vehicle heating circulation circuit via a built-in hydrogen circulation pump; The device comprises: A first control module, configured to obtain the coolant temperature of the cooling circuit and the ambient temperature of the fuel cell vehicle after the fuel cell vehicle receives a start command; A second control module is used for controlling the heater in the vehicle warm air circulation loop to heat warm air circulation water according to a first heating power after controlling the main valve of the three-way valve to be closed if the coolant temperature is lower than a first temperature threshold and the ambient temperature is lower than a second temperature threshold, and controlling the first water pump in the vehicle warm air circulation loop to circulate the heated warm air circulation water to the pipeline corresponding to the hydrogen circulation pump according to a preset speed; A third control module is used to control the fuel cell system to obtain the coolant temperature in real time after starting up; when the coolant temperature is greater than a third temperature threshold, control the heater to heat the warm air circulating water according to a second heating power; wherein the second heating power is less than the first heating power; and the third temperature threshold is greater than the first temperature threshold; The fourth control module is used to control the heater to stop heating the warm air circulating water when the coolant temperature is greater than a fourth temperature threshold; wherein the fourth temperature threshold is greater than the third temperature threshold.

10. A vehicle, characterized in that: During the startup thermal management control process of the vehicle, the startup thermal management control method for a fuel cell vehicle according to any one of claims 1 to 8 is adopted.

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