Vehicle low-temperature control method and device for whole vehicle, vehicle and storage medium

Abstract

The invention relates to a whole vehicle low-temperature control method and device of a vehicle, the vehicle and a storage medium, and the method comprises the steps that whether the current environment temperature of a fuel cell is smaller than a first preset temperature threshold value or not is judged, and if the current environment temperature is smaller than the first preset temperature threshold value, whether a hydrogen internal combustion engine meets a preset starting condition or not is judged; under the condition that the preset starting condition is met, the hydrogen internal combustion engine is started, the first pipeline is opened, the current environment temperature is increased through tail gas generated by the hydrogen internal combustion engine till the current environment temperature meets the preset starting condition of the fuel cell, the first pipeline is closed, and the second pipeline is opened; and starting the fuel cell, and adjusting the output power of the fuel cell and the output power of the hydrogen internal combustion engine based on the power demand power to meet the power demand of the vehicle. Therefore, the technical problems that in the prior art, when a built-in or external heating device is used for heating the battery, electricity consumption is large, the endurance of the vehicle is affected, it is difficult to guarantee that enough heat is provided for the fuel battery in the cold start process, and the driving experience of a user is affected are solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a vehicle low-temperature control method, device, vehicle, and storage medium. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy, also known as an electrochemical generator. Low-temperature cold starts, a core technical bottleneck facing the commercialization of fuel cell vehicles, pose a systemic threat to the reliability and durability of fuel cells, including material degradation, performance degradation, system failure, and reduced lifespan.

[0003] In related technologies, to cope with the cold start condition of the fuel cell, the battery can be heated by a built-in or external heating device in the fuel cell to avoid low-temperature starting of the fuel cell. However, most devices are electric heating or microwave heating that consumes electricity. On the one hand, this affects the vehicle's endurance. On the other hand, when the power battery energy storage is too low, it is difficult to provide sufficient heat for the cold start process, which urgently needs to be improved. Summary of the Invention

[0004] The present application provides a vehicle low-temperature control method, device, vehicle and storage medium to solve the technical problem in the related art that using built-in or external heating devices to heat the battery consumes a lot of electricity, which not only affects the vehicle's endurance, but also makes it difficult to ensure that sufficient heat is provided to the fuel cell during the cold start process, affecting the user's driving experience.

[0005] A first embodiment of the present application provides a vehicle low-temperature control method for a vehicle, wherein a tail exhaust three-way valve is provided at the tail exhaust of a hydrogen internal combustion engine of the vehicle, wherein when the tail exhaust three-way valve opens a first pipeline, the exhaust gas generated by the hydrogen internal combustion engine is transmitted to a fuel cell, and when the tail exhaust three-way valve opens a second pipeline, the exhaust gas is prohibited from being transmitted to the fuel cell, wherein the method includes the following steps: obtaining a current ambient temperature of the fuel cell; judging whether the current ambient temperature is less than a first preset temperature threshold, and when it is less than the first preset temperature threshold, judging whether the hydrogen internal combustion engine meets a preset start-up condition based on the discharge power of the vehicle's power battery and the power demand power of the vehicle; when the preset start-up condition is met, starting the hydrogen internal combustion engine and opening the first pipeline to use the exhaust gas generated by the hydrogen internal combustion engine to increase the current ambient temperature until the current ambient temperature meets the preset start-up condition of the fuel cell, closing the first pipeline and opening the second pipeline; starting the fuel cell, and adjusting the output power of the fuel cell and the output power of the hydrogen internal combustion engine based on the power demand power to meet the power demand of the vehicle.

[0006] Optionally, in one embodiment of the present application, the judging of whether the hydrogen internal combustion engine meets the preset starting conditions based on the discharge power of the vehicle's power battery and the power demand power of the vehicle includes: judging whether the discharge power is greater than the power demand power of the vehicle; if the discharge power is less than or equal to the power demand power, determining that the hydrogen internal combustion engine meets the preset starting conditions, and starting the hydrogen internal combustion engine; otherwise, maintaining the idle state or shutdown state of the fuel cell, and using the starting power of the power battery to meet the power demand.

[0007] Optionally, in one embodiment of the present application, starting the hydrogen internal combustion engine and opening the first pipeline to use the exhaust gas generated by the hydrogen internal combustion engine to increase the current ambient temperature until the current ambient temperature meets the preset start-up conditions of the fuel cell include: adjusting the output power of the hydrogen internal combustion engine to the power demand power, and opening the first pipeline to use the exhaust gas to increase the current ambient temperature until the current ambient temperature is greater than or equal to a second preset temperature threshold; obtaining the external ambient temperature; and adjusting the opening of the tail exhaust three-way valve in combination with the external ambient temperature to adjust the flow of the first pipeline until the current ambient temperature is greater than or equal to a third preset temperature threshold.

[0008] Optionally, in one embodiment of the present application, starting the fuel cell and adjusting the output power of the fuel cell and the output power of the hydrogen internal combustion engine based on the power demand power includes: starting the fuel cell and determining whether the power demand power is less than a preset power threshold; if it is less than the preset power threshold, shutting down the hydrogen internal combustion engine and adjusting the output power of the fuel cell to meet the power demand.

[0009] Optionally, in one embodiment of the present application, after determining whether the power demand is less than a preset power threshold, it also includes: if it is greater than or equal to the preset power threshold, adjusting the output power of the fuel cell so that the output power is equal to the preset power threshold, and adjusting the power of the hydrogen internal combustion engine based on the output power.

[0010] The second embodiment of the present application provides a vehicle low-temperature control device, wherein a tail exhaust three-way valve is provided at the tail exhaust of the hydrogen internal combustion engine of the vehicle, wherein when the tail exhaust three-way valve opens a first pipeline, the exhaust gas generated by the hydrogen internal combustion engine is transmitted to the fuel cell, and when the tail exhaust three-way valve opens a second pipeline, the exhaust gas is prohibited from being transmitted to the fuel cell, wherein the device includes: an acquisition module for acquiring the current ambient temperature of the fuel cell; a judgment module for judging whether the current ambient temperature is less than a first preset temperature threshold, and when it is less than the first preset temperature threshold, based on the discharge of the vehicle's power battery The power and the power demand power of the vehicle are used to determine whether the hydrogen internal combustion engine meets the preset starting conditions; a first control module is used to start the hydrogen internal combustion engine and open the first pipeline when the preset starting conditions are met, so as to use the exhaust gas generated by the hydrogen internal combustion engine to increase the current ambient temperature until the current ambient temperature meets the preset starting conditions of the fuel cell, and close the first pipeline and open the second pipeline; a second control module is used to start the fuel cell and adjust the output power of the fuel cell and the output power of the hydrogen internal combustion engine based on the power demand power to meet the power demand of the vehicle.

[0011] Optionally, in one embodiment of the present application, the judgment module includes: a judgment unit, used to judge whether the discharge power is greater than the power demand power of the vehicle; a first control unit, used to determine that the hydrogen internal combustion engine meets the preset start-up conditions and start the hydrogen internal combustion engine when the discharge power is less than or equal to the power demand power; otherwise, maintain the idle state or shutdown state of the fuel cell and use the starting power of the power battery to meet the power demand.

[0012] Optionally, in one embodiment of the present application, the first control module includes: an adjustment unit for adjusting the output power of the hydrogen internal combustion engine to the power demand power, and opening the first pipeline to use the exhaust gas to increase the current ambient temperature until the current ambient temperature is greater than or equal to a second preset temperature threshold; an acquisition unit for obtaining the external ambient temperature; and a regulating unit for adjusting the opening of the tail exhaust three-way valve in combination with the external ambient temperature to adjust the flow of the first pipeline until the current ambient temperature is greater than or equal to a third preset temperature threshold.

[0013] Optionally, in one embodiment of the present application, the second control module includes: a starting unit, used to start the fuel cell and determine whether the power demand is less than a preset power threshold; a second control unit, used to shut down the hydrogen internal combustion engine when the power demand is less than the preset power threshold, and adjust the output power of the fuel cell to meet the power demand.

[0014] Optionally, in one embodiment of the present application, the second control module further includes: a third control unit, for adjusting the output power of the fuel cell when the output power is greater than or equal to the preset power threshold so that the output power is equal to the preset power threshold, and adjusting the power of the hydrogen internal combustion engine based on the output power.

[0015] The third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle low-temperature control method as described in the above embodiment.

[0016] The fourth aspect of the present application provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the vehicle low-temperature control method as described in the above embodiment.

[0017] The fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned vehicle low-temperature control method.

[0018] The embodiment of the present application can use the tail exhaust three-way valve set at the tail exhaust of the hydrogen internal combustion engine to increase the ambient temperature of the fuel cell using the exhaust gas discharged by the hydrogen internal combustion engine. After the ambient temperature of the fuel cell reaches the standard, the passage of the tail exhaust three-way valve is promptly adjusted to prevent high temperature from affecting the normal operation of the fuel cell, reduce the cost of the same power level, significantly increase the cold start speed of the hydrogen fuel cell engine, reduce the cold start frequency, and improve the life and reliability of the entire machine. This solves the technical problem in the related art that using built-in or external heating devices to heat the battery consumes a lot of electricity, not only affecting the vehicle's cruising range, but also making it difficult to ensure that sufficient heat is provided to the fuel cell during the cold start process, affecting the user's driving experience.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 This is a flow chart of a vehicle low-temperature control method according to an embodiment of the present application; Figure 2 This is a schematic diagram of the principle of a vehicle low-temperature control method provided according to one embodiment of the present application; Figure 3A schematic diagram showing the relationship between pipeline opening, flow rate, and external ambient temperature according to an embodiment of the present application; Figure 4 This is a flow chart of a vehicle low temperature control method according to one embodiment of the present application; Figure 5 This is a schematic structural diagram of a vehicle low-temperature control device according to an embodiment of the present application; Figure 6 A schematic structural diagram of a vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0022] The following describes the vehicle low temperature control method, device, vehicle and storage medium of the vehicle of the embodiment of the present application with reference to the accompanying drawings. In view of the related art mentioned in the above background technology, the use of built-in or external heating devices to heat the battery consumes a large amount of electricity, which not only affects the vehicle's cruising range, but also makes it difficult to ensure that sufficient heat is provided to the fuel cell during the cold start process, affecting the user's driving experience. The present application provides a vehicle low temperature control method, in which the exhaust gas discharged by the hydrogen internal combustion engine can be used to increase the ambient temperature of the fuel cell by a tail exhaust three-way valve provided at the tail exhaust of the hydrogen internal combustion engine. After the ambient temperature of the fuel cell reaches the standard, the passage of the tail exhaust three-way valve is adjusted in time to avoid high temperature affecting the normal operation of the fuel cell, reduce the cost of the same power level, significantly increase the cold start speed of the hydrogen fuel cell engine, reduce the cold start frequency, and improve the life and reliability of the whole machine. Thus, the related art solves the problem that the use of built-in or external heating devices to heat the battery consumes a large amount of electricity, which not only affects the vehicle's cruising range, but also makes it difficult to ensure that sufficient heat is provided to the fuel cell during the cold start process, affecting the user's driving experience.

[0023] Specifically, Figure 1 A schematic flow chart of a method for controlling low temperature of a vehicle provided in an embodiment of the present application.

[0024] like Figure 1 As shown, the vehicle low-temperature control method of the vehicle is provided with a tail exhaust three-way valve at the tail exhaust of the hydrogen internal combustion engine. When the tail exhaust three-way valve opens the first pipeline, the exhaust gas generated by the hydrogen internal combustion engine is transmitted to the fuel cell. When the tail exhaust three-way valve opens the second pipeline, the exhaust gas is prohibited from being transmitted to the fuel cell. The method includes the following steps: In step S101 , the current ambient temperature of the fuel cell is acquired.

[0025] During the actual implementation process, the embodiments of the present application can collect the current ambient temperature of the fuel cell. There are many collection methods, for example, using a temperature sensor (such as a thermocouple, thermistor, RTD, infrared sensor) to directly measure the air around the engine or the surface temperature of key components; reading the temperature data in the engine control unit through the on-board diagnostic system interface; using an independent data recorder to monitor the ambient temperature for a long time; using a thermodynamic model or machine learning algorithm to predict the current ambient temperature based on the engine operating conditions (such as load, speed, coolant temperature); using an infrared thermal imager to non-contact measure the engine surface temperature distribution to assist in verifying the sensor data, etc. The specific settings can be made according to the actual situation and are not specifically limited here.

[0026] In step S102, it is determined whether the current ambient temperature is less than a first preset temperature threshold, and if it is less than the first preset temperature threshold, it is determined whether the hydrogen internal combustion engine meets the preset starting conditions based on the discharge power of the vehicle's power battery and the vehicle's power demand power.

[0027] Furthermore, the embodiment of the present application can determine whether the current ambient temperature is less than a certain temperature threshold. If it is greater than or equal to the temperature threshold, the embodiment of the present application can determine that the fuel cell can be started normally at this time. At this time, the fuel cell can be started according to the normal temperature energy management strategy.

[0028] If the temperature is lower than the threshold, it indicates that the current ambient temperature is low and needs to be raised. In this case, the embodiment of the present application can determine whether to start the hydrogen internal combustion engine based on the discharge power of the power battery and the power demand of the vehicle, so as to avoid the situation where the fuel cell ambient temperature cannot be effectively raised and the appropriate power cannot be provided in the case of insufficient power.

[0029] The first preset temperature threshold can be set accordingly by those skilled in the art according to actual conditions and is not specifically limited here.

[0030] Optionally, in one embodiment of the present application, whether the hydrogen internal combustion engine meets the preset starting conditions is determined based on the discharge power of the vehicle's power battery and the vehicle's power demand power, including: determining whether the discharge power is greater than the vehicle's power demand power; if the discharge power is less than or equal to the power demand power, determining that the hydrogen internal combustion engine meets the preset starting conditions, and starting the hydrogen internal combustion engine, otherwise, maintaining the fuel cell in an idle state or a shutdown state, and using the starting power of the power battery to meet the power demand.

[0031] It can be understood that when the discharge power is greater than the power demand power, it means that the power battery can bear the power energy consumption of the vehicle. At this time, there is no need to quickly increase the ambient temperature of the fuel cell. The fuel cell engine remains in idle / shutdown state, the hydrogen internal combustion engine remains in idle / shutdown state, and the power demand of the entire vehicle is provided by the power battery.

[0032] When the discharge power is less than or equal to the power demand power, it means that the power battery is insufficient to bear the kinetic energy consumption of the vehicle. At this time, it is necessary to be supported by another power source. At this time, it can be determined that the hydrogen internal combustion engine meets the starting conditions and is started to provide power support while using the exhaust gas of the hydrogen internal combustion engine to increase the ambient temperature.

[0033] In step S103, when the preset start-up conditions are met, the hydrogen internal combustion engine is started and the first pipeline is opened to use the exhaust gas generated by the hydrogen internal combustion engine to increase the current ambient temperature until the current ambient temperature meets the preset start-up conditions of the fuel cell, and the first pipeline is closed and the second pipeline is opened.

[0034] First, the two paths of the exhaust three-way valve are explained.

[0035] like Figure 2 As shown, when the tail exhaust three-way valve opens the first pipeline, the high-temperature exhaust gas generated by the hydrogen internal combustion engine can enter the fuel cell part, heat the ambient temperature around the fuel cell, and then increase the ambient temperature, improve the cold start conditions of the fuel cell, shorten the cold start time, reduce the difficulty of cold start, and improve the life, reliability and environmental adaptability of the fuel cell engine. When the temperature of the fuel cell engine rises to an appropriate value, the tail exhaust three-way valve can close the first pipeline and open the second pipeline to prevent the high-temperature air of the hydrogen internal combustion engine from entering the fuel cell.

[0036] The preset start-up conditions of the fuel cell can be set accordingly according to actual conditions and are not specifically limited here.

[0037] Optionally, in one embodiment of the present application, the hydrogen internal combustion engine is started and the first pipeline is opened to use the exhaust gas generated by the hydrogen internal combustion engine to increase the current ambient temperature until the current ambient temperature meets the preset start-up conditions of the fuel cell, including: adjusting the output power of the hydrogen internal combustion engine to the power demand power, and opening the first pipeline to use the exhaust gas to increase the current ambient temperature until the current ambient temperature is greater than or equal to the second preset temperature threshold; obtaining the external ambient temperature; adjusting the opening of the tail exhaust three-way valve in combination with the external ambient temperature to adjust the flow of the first pipeline until the current ambient temperature is greater than or equal to the third preset temperature threshold.

[0038] After determining that the hydrogen internal combustion engine needs to be started, the embodiment of the present application can use the hydrogen internal combustion engine as the main power source, adjust the output power of the hydrogen internal combustion engine to the power demand, and open the first pipeline to use the exhaust gas to increase the current ambient temperature, and always pay attention to the changes in the current ambient temperature. When the current ambient temperature is greater than another temperature threshold, adjust the opening of the tail exhaust three-way valve to avoid the current ambient temperature being too high. Among them, the relationship between the opening and flow of the first pipeline (pipeline 1) and the external ambient temperature can be as follows: Figure 3 As shown, until the current ambient temperature reaches the target operating temperature, that is, the third preset temperature threshold, the first pipeline can be closed and the second pipeline can be opened.

[0039] Among them, the second preset temperature threshold is greater than the first preset temperature threshold, and the third preset temperature threshold is greater than the second preset temperature threshold. The second preset temperature threshold and the third preset temperature threshold can be set accordingly according to actual conditions and are not specifically limited here.

[0040] In step S104 , the fuel cell is started, and the output power of the fuel cell and the output power of the hydrogen internal combustion engine are adjusted based on the power demand to meet the power demand of the vehicle.

[0041] As a possible implementation method, after the current ambient temperature reaches the target operating temperature, the embodiment of the present application can start the fuel cell and adjust the fuel cell output power and the hydrogen internal combustion engine output power according to the power demand of the vehicle to meet the power demand while saving costs.

[0042] Optionally, in one embodiment of the present application, the fuel cell is started, and the output power of the fuel cell and the output power of the hydrogen internal combustion engine are adjusted based on the power demand power, including: starting the fuel cell and determining whether the power demand power is less than a preset power threshold; if it is less than the preset power threshold, shutting down the hydrogen internal combustion engine and adjusting the output power of the fuel cell to meet the power demand.

[0043] Furthermore, after starting the fuel cell, the embodiment of the present application can determine whether the power demand is less than a certain power threshold. If it is less than the power threshold, the embodiment of the present application can no longer provide power without the hydrogen internal combustion engine. At this time, the output power of the fuel cell is adjusted to meet the power demand of the vehicle. The preset power threshold can be set accordingly by those skilled in the art according to actual conditions, and no specific restrictions are made here.

[0044] Optionally, in one embodiment of the present application, after determining whether the power demand is less than a preset power threshold, it also includes: if it is greater than or equal to the preset power threshold, adjusting the output power of the fuel cell so that the output power is equal to the preset power threshold, and adjusting the power of the hydrogen internal combustion engine based on the output power.

[0045] Furthermore, when the power demand is greater than or equal to a certain power threshold, in the embodiment of the present application, the hydrogen internal combustion engine needs to continue to provide power to meet the power demand.

[0046] Combine Figure 2-Figure 4 As shown, the working principle of the vehicle low temperature control method of the embodiment of the present application is described in detail using an embodiment.

[0047] like Figure 2 As shown, the vehicle of the embodiment of the present application may include three major power sources: a fuel cell, a hydrogen internal combustion engine, and a power battery.

[0048] Among them, by coupling the two major power systems of hydrogen internal combustion engine and fuel cell engine, the system's working efficiency can be comprehensively improved and the system cost can be reduced.

[0049] Due to the reaction mechanism of hydrogen internal combustion engines, the exhaust gas temperature can reach over 500°C, but the normal operating temperature of fuel cell engines is generally required to be below 80°C. Therefore, in the multi-power source vehicle solution, it is necessary to install insulation material between the hydrogen internal combustion engine and the fuel cell engine to prevent heat diffusion from the hydrogen internal combustion engine.

[0050] In the embodiment of the present application, a tail exhaust three-way valve can be set at the tail exhaust of the hydrogen internal combustion engine while setting the thermal insulation material. When the tail exhaust three-way valve opens pipeline 1 (first pipeline), the high-temperature exhaust gas generated by the hydrogen internal combustion engine can enter the fuel cell part, heat the ambient temperature around the fuel cell, and then increase the ambient temperature, improve the cold start conditions of the fuel cell, shorten the cold start time, reduce the difficulty of cold start, and improve the life, reliability and environmental adaptability of the fuel cell engine. When the temperature of the fuel cell engine rises to an appropriate value, the tail exhaust three-way valve can close pipeline 1 and open pipeline 2 (second pipeline) to prevent the high-temperature air of the hydrogen internal combustion engine from entering the fuel cell.

[0051] like Figure 4 As shown, the embodiment of the present application can obtain whether the vehicle receives a power output request. If not, the hydrogen internal combustion engine and the fuel cell engine are kept turned off. If the vehicle has a power output request, the current ambient temperature T1 around the current fuel cell engine is obtained. If the current ambient temperature T1 around the fuel cell engine is greater than or equal to A (a first preset temperature threshold), the normal temperature energy management strategy is started.

[0052] If the current ambient temperature T1 around the fuel cell engine is less than A, the current power battery discharge power (SOC) is obtained, and the power battery discharge power P2 is confirmed based on the power battery discharge power, and the power demand power P1 of the entire vehicle is obtained.

[0053] If P1 < P2, the fuel cell engine remains in idle / shutdown state, the hydrogen internal combustion engine remains in idle / shutdown state, and the power required by the entire vehicle is provided by the power battery.

[0054] If P1≥P2, start the hydrogen internal combustion engine and control the output power of the hydrogen internal combustion engine to P3=P1. The tail exhaust three-way valve opens pipeline 1 and closes pipeline 2. The current ambient temperature T1 around the fuel cell engine is obtained. If the current ambient temperature T1 around the fuel cell engine is <B (the second preset temperature threshold), then continue to open pipeline 1 and close pipeline 2 with the tail exhaust three-way valve.

[0055] If T1≥B, obtain the external ambient temperature T0, such as Figure 3 As shown, according to the external ambient temperature, the opening of the tail exhaust three-way valve is set to adjust the flow through pipeline 1. If the ambient temperature around the fuel cell engine is T1<C, the opening of the tail exhaust three-way valve is continued to be set according to the external ambient temperature to adjust the flow through pipeline 1. (The tail exhaust three-way valve can adjust the flow into pipeline 1 by adjusting the opening. When the temperature of the fuel cell engine is slightly high, the temperature rise of the fuel cell compartment is accurately controlled by flow regulation to prevent the fuel cell compartment from overheating.) If the current ambient temperature around the fuel cell engine is T1≥C (the third preset temperature threshold), the fuel cell compartment reaches the target operating temperature at this time, the tail exhaust three-way valve closes pipeline 1, opens pipeline 2, and starts the fuel cell engine. P1<D, the hydrogen internal combustion engine is shut down, and the output power of the fuel cell engine is controlled to P3=P1. If P1≥D, the output power of the fuel cell engine is controlled to P3=D, and the output power of the hydrogen internal combustion engine is controlled to P4=P1-D.

[0056] In summary, the embodiments of the present application can reduce the system cost of the same power level by coupling the hydrogen internal combustion engine and the fuel cell, effectively utilize the waste heat generated by the hydrogen internal combustion engine to heat the hydrogen fuel cell engine, and achieve efficient utilization of waste heat. At the same time, it can greatly improve the cold start speed of the hydrogen fuel cell engine; effectively reduce the cold start frequency, and improve the life and reliability of the whole machine; increase the minimum cold start temperature of the fuel cell engine, and improve environmental adaptability (the fuel cell engine is affected by its reaction characteristics, and the general cold start temperature cannot be lower than -30°C, but the embodiments of the present application can support operation in -40°C or even lower environmental conditions); the tail exhaust three-way valve can adjust the flow into pipeline 1 by adjusting the opening. When the temperature of the fuel cell engine is slightly high, the temperature rise of the fuel cell compartment can be accurately controlled by flow regulation to prevent the fuel cell compartment from overheating. According to the vehicle low-temperature control method proposed in the embodiment of the present application, the tail exhaust three-way valve provided at the tail exhaust of the hydrogen internal combustion engine can be used to increase the ambient temperature of the fuel cell by using the exhaust gas discharged by the hydrogen internal combustion engine. After the ambient temperature of the fuel cell reaches the standard, the passage of the tail exhaust three-way valve is adjusted in time to avoid high temperature affecting the normal operation of the fuel cell, reduce the cost of the same power level, significantly increase the cold start speed of the hydrogen fuel cell engine, reduce the cold start frequency, and improve the life and reliability of the whole machine. Thus, the technical problem in the related art that using built-in or external heating devices to heat the battery consumes a lot of electricity, not only affects the vehicle's endurance, but also makes it difficult to ensure that sufficient heat is provided to the fuel cell during the cold start process, affecting the user's driving experience is solved.

[0057] Next, the whole vehicle low temperature control device according to the embodiment of the present application will be described with reference to the accompanying drawings.

[0058] Figure 5 It is a block diagram of a vehicle low temperature control device according to an embodiment of the present application.

[0059] like Figure 5 As shown, the vehicle's whole-vehicle low-temperature control device 10 is provided with a tail exhaust three-way valve at the tail exhaust of the hydrogen internal combustion engine. When the tail exhaust three-way valve opens the first pipeline, the exhaust gas generated by the hydrogen internal combustion engine is transmitted to the fuel cell. When the tail exhaust three-way valve opens the second pipeline, the exhaust gas is prohibited from being transmitted to the fuel cell. The device 10 includes: an acquisition module 100, a judgment module 200, a first control module 300 and a second control module 400.

[0060] Specifically, the acquisition module 100 is used to acquire the current ambient temperature of the fuel cell.

[0061] The judgment module 200 is used to judge whether the current ambient temperature is less than a first preset temperature threshold, and if it is less than the first preset temperature threshold, judge whether the hydrogen internal combustion engine meets the preset starting conditions based on the discharge power of the vehicle's power battery and the vehicle's power demand power.

[0062] The first control module 300 is used to start the hydrogen internal combustion engine and open the first pipeline when the preset starting conditions are met, so as to use the exhaust gas generated by the hydrogen internal combustion engine to increase the current ambient temperature until the current ambient temperature meets the preset starting conditions of the fuel cell, and then close the first pipeline and open the second pipeline.

[0063] The second control module 400 is used to start the fuel cell and adjust the output power of the fuel cell and the output power of the hydrogen internal combustion engine based on the power demand to meet the power demand of the vehicle.

[0064] Optionally, in one embodiment of the present application, the judgment module 200 includes: a judgment unit and a first control unit.

[0065] The judging unit is used to judge whether the discharge power is greater than the power requirement of the vehicle.

[0066] The first control unit is used to determine whether the hydrogen internal combustion engine meets the preset starting conditions and start the hydrogen internal combustion engine when the discharge power is less than or equal to the power demand power. Otherwise, the fuel cell is kept in an idle state or a shutdown state, and the power demand is met by using the starting power of the power battery.

[0067] Optionally, in one embodiment of the present application, the first control module 300 includes: an adjustment unit, an acquisition unit, and a regulating unit.

[0068] The adjustment unit is used to adjust the output power of the hydrogen internal combustion engine to the power demand, and open the first pipeline to use the exhaust gas to increase the current ambient temperature until the current ambient temperature is greater than or equal to the second preset temperature threshold.

[0069] The acquisition unit is used to obtain the external environment temperature.

[0070] The regulating unit is used to adjust the opening of the tail exhaust three-way valve in combination with the external ambient temperature to adjust the flow of the first pipeline until the current ambient temperature is greater than or equal to a third preset temperature threshold.

[0071] Optionally, in one embodiment of the present application, the second control module 400 includes: a starting unit and a second control unit.

[0072] The starting unit is used to start the fuel cell and determine whether the power demand is less than a preset power threshold.

[0073] The second control unit is used to shut down the hydrogen internal combustion engine when the power is less than a preset power threshold, and adjust the output power of the fuel cell to meet the power demand.

[0074] Optionally, in one embodiment of the present application, the second control module 400 further includes: a third control unit.

[0075] The third control unit is configured to adjust the output power of the fuel cell when the output power is greater than or equal to a preset power threshold so that the output power is equal to the preset power threshold, and adjust the power of the hydrogen internal combustion engine based on the output power.

[0076] It should be noted that the above explanation of the embodiment of the vehicle low-temperature control method is also applicable to the vehicle low-temperature control device of this embodiment, and will not be repeated here.

[0077] According to the vehicle low-temperature control device proposed in the embodiment of the present application, the tail exhaust three-way valve provided at the tail exhaust of the hydrogen internal combustion engine can be used to increase the ambient temperature of the fuel cell by using the exhaust gas discharged by the hydrogen internal combustion engine. After the ambient temperature of the fuel cell reaches the standard, the passage of the tail exhaust three-way valve is adjusted in time to avoid high temperature affecting the normal operation of the fuel cell, reduce the cost of the same power level, greatly improve the cold start speed of the hydrogen fuel cell engine, reduce the cold start frequency, and improve the life and reliability of the whole machine. Thus, the technical problem in the related art that using built-in or external heating devices to heat the battery consumes a lot of electricity, not only affects the vehicle's endurance, but also makes it difficult to ensure that sufficient heat is provided to the fuel cell during the cold start process, affecting the user's driving experience is solved.

[0078] Figure 6 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include: A memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0079] When the processor 602 executes the program, the vehicle low temperature control method provided in the above embodiment is implemented.

[0080] Furthermore, the vehicle further comprises: The communication interface 603 is used for communication between the memory 601 and the processor 602 .

[0081] The memory 601 is used to store computer programs that can be run on the processor 602 .

[0082] The memory 601 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0083] If the memory 601, processor 602, and communication interface 603 are implemented independently, the communication interface 603, memory 601, and processor 602 can be connected to each other via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be divided into address buses, data buses, control buses, etc. For ease of representation, Figure 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0084] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can communicate with each other through an internal interface.

[0085] The processor 602 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0086] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned vehicle low-temperature control method.

[0087] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the vehicle low-temperature control method provided by an embodiment of the present invention.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0090] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing a custom logical function or process step, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed in a different order than shown or discussed, including performing functions in a substantially simultaneous manner or in a reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0091] The logic and / or steps represented in a flowchart or otherwise described herein, for example, can be considered a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" is any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (not exhaustive) of computer-readable media include: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program can be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing it in other suitable ways as necessary, and then storing it in a computer memory.

[0092] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having logic gate circuits for implementing logical functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field-programmable gate array (FPGA), etc.

[0093] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0094] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0095] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for controlling low temperature of a vehicle, characterized in that: The vehicle is provided with a tail exhaust three-way valve at the tail exhaust of the hydrogen internal combustion engine, wherein when the tail exhaust three-way valve opens a first pipeline, the exhaust gas generated by the hydrogen internal combustion engine is transmitted to the fuel cell, and when the tail exhaust three-way valve opens a second pipeline, the exhaust gas is prohibited from being transmitted to the fuel cell, wherein the method includes the following steps: Obtaining the current ambient temperature of the fuel cell; determining whether the current ambient temperature is less than a first preset temperature threshold, and if the current ambient temperature is less than the first preset temperature threshold, determining whether the hydrogen internal combustion engine meets a preset starting condition based on the discharge power of the vehicle's power battery and the vehicle's power demand; When the preset start-up condition is met, the hydrogen internal combustion engine is started, and the first pipeline is opened to increase the current ambient temperature by utilizing the exhaust gas generated by the hydrogen internal combustion engine until the current ambient temperature meets the preset start-up condition of the fuel cell, and the first pipeline is closed and the second pipeline is opened; The fuel cell is started, and the output power of the fuel cell and the output power of the hydrogen internal combustion engine are adjusted based on the power demand to meet the power demand of the vehicle.

2. The method according to claim 1, characterized in that The determining whether the hydrogen internal combustion engine meets a preset starting condition based on the discharge power of the vehicle's power battery and the vehicle's power demand power includes: determining whether the discharge power is greater than the power requirement of the vehicle; If the discharge power is less than or equal to the power demand power, it is determined that the hydrogen internal combustion engine meets the preset start-up conditions and the hydrogen internal combustion engine is started; otherwise, the fuel cell is kept in an idle state or a shutdown state and the power demand is met by using the starting power of the power battery.

3. The method according to claim 1, characterized in that The starting of the hydrogen internal combustion engine and opening of the first pipeline to increase the current ambient temperature by utilizing the exhaust gas generated by the hydrogen internal combustion engine until the current ambient temperature meets the preset starting condition of the fuel cell includes: adjusting the output power of the hydrogen internal combustion engine to the power demand, and opening the first pipeline to use the exhaust gas to increase the current ambient temperature until the current ambient temperature is greater than or equal to a second preset temperature threshold; Get the external ambient temperature; The opening of the tail exhaust three-way valve is adjusted in combination with the external ambient temperature to adjust the flow of the first pipeline until the current ambient temperature is greater than or equal to a third preset temperature threshold.

4. The method according to claim 1, wherein The starting of the fuel cell and adjusting the output power of the fuel cell and the output power of the hydrogen internal combustion engine based on the power demand power include: Starting the fuel cell and determining whether the power demand is less than a preset power threshold; If it is less than the preset power threshold, the hydrogen internal combustion engine is turned off, and the output power of the fuel cell is adjusted to meet the power demand.

5. The method according to claim 4, characterized in that After determining whether the power demand is less than a preset power threshold, the method further includes: If it is greater than or equal to the preset power threshold, the output power of the fuel cell is adjusted so that the output power is equal to the preset power threshold, and the power of the hydrogen internal combustion engine is adjusted based on the output power.

6. A vehicle low temperature control device, characterized in that: The vehicle is provided with a tail exhaust three-way valve at the tail exhaust of the hydrogen internal combustion engine, wherein when the tail exhaust three-way valve opens a first pipeline, the exhaust gas generated by the hydrogen internal combustion engine is transmitted to the fuel cell, and when the tail exhaust three-way valve opens a second pipeline, the exhaust gas is prohibited from being transmitted to the fuel cell, wherein the device includes: An acquisition module, configured to acquire the current ambient temperature of the fuel cell; a judgment module, configured to judge whether the current ambient temperature is less than a first preset temperature threshold, and if the current ambient temperature is less than the first preset temperature threshold, judge whether the hydrogen internal combustion engine meets a preset starting condition based on the discharge power of the vehicle's power battery and the power demand of the vehicle; a first control module, configured to start the hydrogen internal combustion engine when the preset start-up condition is met, open the first pipeline to increase the current ambient temperature by utilizing the exhaust gas generated by the hydrogen internal combustion engine until the current ambient temperature meets the preset start-up condition of the fuel cell, close the first pipeline, and open the second pipeline; The second control module is configured to start the fuel cell and adjust the output power of the fuel cell and the output power of the hydrogen internal combustion engine based on the power demand to meet the power demand of the vehicle.

7. The device according to claim 6, characterized in that The judgment module includes: a judging unit, configured to judge whether the discharge power is greater than the power requirement of the vehicle; A control unit is used to determine whether the hydrogen internal combustion engine meets the preset starting conditions and start the hydrogen internal combustion engine when the discharge power is less than or equal to the power demand power; otherwise, maintain the idle state or shutdown state of the fuel cell and use the starting power of the power battery to meet the power demand.

8. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle low-temperature control method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the vehicle low-temperature control method as described in any one of claims 1 to 5.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed, it is used to implement the vehicle low temperature control method according to any one of claims 1 to 5.

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