A low-temperature startup control method, device, electronic device, and storage medium

Abstract

The present invention discloses a low-temperature start control method, device, electronic device and storage medium. After receiving a start signal, the ambient temperature of a target vehicle is obtained, and when the ambient temperature is lower than a first preset temperature, a low-temperature start mode is turned on; in the low-temperature start mode, the temperature of the battery stack is obtained, and when the temperature of the battery stack is lower than a second preset temperature, and the temperature difference between the temperature of the battery stack and the ambient temperature is lower than a third preset temperature, a long-term low-temperature start mode is entered; in the low-temperature start mode, according to the temperature of the battery stack, a first preset current value and a first preset voltage value are determined to adjust the current value to the first preset current value, and the air compressor speed and the back pressure valve opening are controlled to make the temperature of the battery stack reach the second preset voltage value; the temperature of the battery stack and the temperature rise rate of the battery stack are monitored to control the start of the target vehicle based on the monitoring content, so as to solve the problem of the incoordination between the water production and the heat generation of the fuel cell when starting at low temperature, so that the fuel cell can be started smoothly, and the efficiency of starting the fuel cell is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to battery control, and in particular to a low-temperature startup control method, device, electronic equipment 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. There are two existing technologies for starting a fuel cell at low temperature: one is to load it with a predetermined current, and the other is to load it with a constant voltage, that is, to keep the voltage output constant and change the current with the temperature.

[0003] However, the method of loading a fuel cell with a predetermined current to start at low temperature may result in a situation where the predetermined current is not reached during the current loading process, i.e., the start-up fails; the method of loading a fuel cell with a constant voltage to start at low temperature may result in frequent changes in the current, and the stack may also produce too much water due to excessive current under low temperature conditions. The above methods have the problem of incoordination between water production and heat generation during the low-temperature start-up of the fuel cell. Summary of the invention

[0004] The present invention provides a low-temperature start-up control method, device, electronic equipment and storage medium, so that a fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is enhanced.

[0005] In a first aspect, the present invention provides a low temperature startup control method, the method comprising:

[0006] When a start signal is received, the ambient temperature of the environment of the target vehicle is obtained, and when the ambient temperature is lower than a first preset temperature threshold, a low temperature start mode is started;

[0007] In the low-temperature start mode, the current stack temperature is obtained, and when the current stack temperature is less than the second preset temperature threshold, and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold, the long-term low-temperature start mode is entered;

[0008] In the low temperature start mode, according to the current stack temperature, a first preset current value and a first preset voltage value are determined, the current value is adjusted to the first preset current value, and the air compressor speed and the back pressure valve opening are controlled so that the stack temperature of the stack reaches a second preset voltage value;

[0009] The stack temperature and the stack temperature rise rate are monitored to control the start-up of the target vehicle based on the stack temperature and the stack temperature rise rate.

[0010] In a second aspect, the present invention provides a low temperature start control device, the device comprising:

[0011] A low-temperature start-up enabling module, configured to obtain the ambient temperature of the environment to which the target vehicle belongs when receiving a start signal, and enable the low-temperature start-up mode when the ambient temperature is lower than a first preset temperature threshold;

[0012] A long-time low-temperature start-up module, configured to obtain the current stack temperature in the low-temperature start-up mode, and enter the long-time low-temperature start-up mode when the current stack temperature is less than a second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than a third preset temperature threshold;

[0013] A low-temperature start-up adjustment module, configured to determine a first preset current value and a first preset voltage value according to the current stack temperature in the low-temperature start-up mode, adjust the current value to the first preset current value, and control the rotational speed of the air compressor and the opening degree of the back-pressure valve, so that the stack temperature of the fuel cell stack reaches the second preset voltage value;

[0014] A vehicle start-up control module, configured to monitor the stack temperature and the stack temperature rise rate, and control the start-up of the target vehicle based on the stack temperature and the stack temperature rise rate.

[0015] In a third aspect, the present invention provides an electronic device for low-temperature start-up control, including:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor, so that the at least one processor can execute the low-temperature start-up control method according to any embodiment of the present invention.

[0019] In a fourth aspect, the present invention provides a computer-readable storage medium, which stores computer instructions for causing a processor to implement the low-temperature start-up control method according to any embodiment of the present invention when executed.

[0020] In a fifth aspect, the present invention provides a computer program product, which includes a computer program that implements the low-temperature start-up control method according to any embodiment of the present invention when executed by a processor.

[0021] The present invention discloses a low-temperature start control method, device, electronic device and storage medium. When a start signal is received, the ambient temperature of the environment to which the target vehicle belongs is obtained, and when the ambient temperature is lower than a first preset temperature threshold, the low-temperature start mode is turned on; in the low-temperature start mode, the current stack temperature is obtained, and when the current stack temperature is lower than a second preset temperature threshold, and the temperature difference between the current stack temperature and the ambient temperature is lower than a third preset temperature threshold, the long-term low-temperature start mode is entered; in the low-temperature start mode, according to the current stack temperature, the first preset current value and the first preset voltage value are determined to adjust the current value to the first preset current value, and the air compressor speed and the back pressure valve opening are controlled so that the stack temperature of the stack reaches the second preset voltage value; the stack temperature and the stack temperature rise rate are monitored to control the start of the target vehicle based on the stack temperature and the stack temperature rise rate. The technical solution disclosed in the present invention solves the problem of the inconsistency between the water production and the calorific value of the fuel cell during low-temperature start-up, and sets three start-up modes: rapid low-temperature start-up, short-term low-temperature start-up and long-term low-temperature start-up. By controlling the reactant supply conditions, the fuel cell can be controlled to operate at a predetermined voltage and current at different temperatures to ensure constant calorific value and water production. The start-up mode is determined by the stack temperature and the stack temperature rise rate until the stack reaches the predetermined temperature and starts successfully, so that the fuel cell can be started smoothly, thereby improving the efficiency of starting the fuel cell and improving the overall performance of the fuel cell.

[0022] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A fuel cell control principle structure diagram provided in Example 1 of the present invention;

[0025] Figure 2 A flowchart of a low temperature startup control method provided in Embodiment 1 of the present invention;

[0026] Figure 3 A flowchart of a low temperature startup control method provided in Embodiment 2 of the present invention;

[0027] Figure 4Flow chart of a low-temperature start control method provided in Embodiment 3 of the present invention;

[0028] Figure 5 Flow chart of a fuel cell low-temperature start control method provided in Embodiment 4 of the present invention;

[0029] Figure 6 Specific flow chart of the fuel cell low-temperature start control method provided in Embodiment 4 of the present invention;

[0030] Figure 7 Structural schematic diagram of a low-temperature start control device provided according to Embodiment 5 of the present invention;

[0031] Figure 8 Structural schematic diagram of an electronic device provided according to Embodiment 6 of the present invention. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] It should be noted that the terms "first preset condition", "second preset condition", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] Embodiment 1

[0035] Before introducing the technical solution, first, the fuel cell control principle structure diagram is described. Refer to Figure 1 . As Figure 1As shown in the figure, the fuel cell control system may include: an air filter, an intake air flow meter, an ambient temperature sensor, an air compressor, a fuel cell stack, a water pump, a back pressure valve, and a DCDC converter. Air can pass through the air filter, enter the air compressor through the intake air flow meter and the ambient temperature sensor. The outlet of the air compressor is connected to the fuel cell stack, and the outlet of the fuel cell stack is connected to the back pressure valve. The water pump is connected to the fuel cell stack for equalizing the temperature of the stack and dissipating heat; the output end of the fuel cell stack is connected to the DCDC converter, and the DCDC converter can perform load control on the fuel cell according to a predetermined voltage or current.

[0036] Figure 2 The figure is a flowchart of a low-temperature start control method provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of the fuel cell during low-temperature start. This method can be executed by a low-temperature start control device in the vehicle. The low-temperature start control device can be implemented in the form of hardware and / or software, and this device is generally integrated in the vehicle. As Figure 2 shown in the figure, this method includes:

[0037] S110. When a start signal is received, obtain the ambient temperature of the environment where the target vehicle is located, and when the ambient temperature is lower than the first preset temperature threshold, turn on the low-temperature start mode.

[0038] In this embodiment, the start signal can be provided by the vehicle's vehicle controller to inform the fuel cell that it needs to perform the power supply function for the vehicle. The target vehicle can be any vehicle, but it must be a vehicle equipped with a fuel cell. The ambient temperature is the temperature of the current environment where the target vehicle is located, which can be obtained by a temperature sensor configured on the vehicle. The first preset temperature threshold is a preset temperature value, for example, it can be -5°C. The low-temperature start mode is relative to the normal-temperature start mode. When the target vehicle is in an environment with a relatively low temperature, the chemical reaction of the fuel cell will slow down, and the charge and discharge efficiency will drop significantly. To solve the problem of low charge and discharge efficiency of the fuel cell during low-temperature start, the target vehicle is configured with a low-temperature start mode so that the target vehicle can start smoothly in a low-temperature environment. Among them, the low-temperature start mode can also include a fast low-temperature start mode, a short-time low-temperature start mode, and a long-time low-temperature start mode.

[0039] Specifically, when it is detected that the fuel cell receives an instruction from the vehicle's vehicle controller to start the fuel cell, the temperature sensor configured on the target vehicle can collect the temperature of the current environment where it is located, and compare the current environment temperature with the first preset temperature threshold. If the current environment temperature is less than the first preset temperature threshold, then turn on the low-temperature start mode to start the target vehicle.

[0040] Exemplarily, when it is detected that the fuel cell receives an instruction from the vehicle's vehicle controller to start the fuel cell, the temperature of the current environment can be collected by a temperature sensor configured on the target vehicle. For example, the temperature of the current environment is -10°C. Assuming that the first preset temperature threshold is -5°C, since the current environmental temperature of -10°C is less than the first preset temperature threshold of -5°C, at this time, it is necessary to start the target vehicle in the low-temperature start mode.

[0041] S120. In the low-temperature start mode, obtain the current stack temperature, and when the current stack temperature is less than the second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold, enter the long-duration low-temperature start mode.

[0042] Among them, the stack temperature is the temperature of the fuel cell stack, which can be obtained by collecting with a stack temperature sensor configured in the fuel cell stack. The second preset temperature threshold is a preset temperature value, for example, it can be -20°C. The third preset temperature threshold is a preset temperature value, for example, it can be 3°C. The long-duration low-temperature start mode means that the current ambient temperature of the target vehicle is low and the stack has been in a low-temperature environment for a long time, and it is necessary to enter the long-duration low-temperature start mode. The specific working content of the long-duration low-temperature start mode is: generate a constant calorific value and water production, determine the voltage and current set values according to the stack temperature, and then realize the start function of the target vehicle according to the set values of the voltage and current.

[0043] Specifically, in the low-temperature start mode, the target vehicle can enter the fast low-temperature start mode, the short-duration low-temperature start mode or the long-duration low-temperature start mode according to different preset conditions. In the low-temperature start mode, the current temperature of the fuel cell stack of the target vehicle is collected by a stack temperature sensor configured in the fuel cell stack, and a temperature difference is obtained by subtracting the current ambient temperature from the obtained current stack temperature. Compare the current stack temperature with the second preset temperature threshold, and compare the temperature difference with the third preset temperature threshold. If the current stack temperature is less than the second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold, then the target vehicle enters the long-duration low-temperature start mode.

[0044] Exemplarily, in the low-temperature start-up mode, the current temperature of the fuel cell stack of the target vehicle is acquired by the stack temperature sensor configured in the fuel cell stack. For example, the current temperature of the stack is -25°C. The difference between the acquired current temperature of the stack and the current ambient temperature is calculated to obtain a temperature difference. For example, the temperature difference is -15°C. Assume that the second preset temperature threshold is -20°C and the third preset temperature threshold is 3°C. Compare the current stack temperature of -25°C with the second preset temperature threshold of -20°C, and compare the temperature difference of -15°C with the third preset temperature threshold of 3°C. It can be seen that when the current stack temperature is lower than the second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold, the target vehicle enters the long-term low-temperature start-up mode at this time.

[0045] S130. In the low-temperature start-up mode, determine a first preset current value and a first preset voltage value according to the current stack temperature, adjust the current value to the first preset current value, and control the rotational speed of the air compressor and the opening of the back pressure valve so that the stack voltage of the fuel cell reaches the second preset voltage value.

[0046] Among them, the first preset current value is a preset current value. For example, it can be 5A. The first preset voltage value is a preset voltage value. For example, it can be 10V. An air compressor is a device used to compress gas. By controlling the rotational speed of the air compressor, the stack voltage of the fuel cell of the target vehicle can be changed. The back pressure valve is a device for controlling pressure. By controlling the opening of the back pressure valve, the stack voltage of the fuel cell of the target vehicle can be changed. By controlling the rotational speed of the air compressor and the opening of the back pressure valve, the voltage of the fuel cell stack can be controlled. The second preset voltage value is a preset voltage value. For example, it can be 15V.

[0047] Specifically, in the low-temperature start-up mode, the target vehicle can determine the first preset current value and the first preset voltage value according to the current stack temperature. At this time, the water pump does not start, air and hydrogen are supplied to the fuel cell of the target vehicle, the current value is adjusted to the first preset current value by the DC converter and acts on the fuel cell; at the same time, by controlling the rotational speed of the air compressor and the opening of the back pressure valve, the fuel cell works in a low-flow high-pressure state until the stack voltage reaches the second preset voltage value.

[0048] S140. Monitor the stack temperature and the stack temperature rise rate to control the start-up of the target vehicle based on the stack temperature and the stack temperature rise rate.

[0049] Among them, the stack temperature rise rate is the speed at which the temperature of the fuel cell stack of the target vehicle rises, which can characterize the speed of the stack temperature rise.

[0050] Specifically, during the low-temperature starting process of the target vehicle, the stack temperature and the stack temperature rise rate are continuously monitored. When the stack temperature and the stack temperature rise rate reach a certain preset condition, the target vehicle can be controlled to switch to other starting modes to execute the starting function.

[0051] The present invention discloses a low-temperature start control method, device, electronic device and storage medium. When a start signal is received, the ambient temperature of the environment to which the target vehicle belongs is obtained, and when the ambient temperature is lower than a first preset temperature threshold, the low-temperature start mode is turned on; in the low-temperature start mode, the current stack temperature is obtained, and when the current stack temperature is lower than a second preset temperature threshold, and the temperature difference between the current stack temperature and the ambient temperature is lower than a third preset temperature threshold, the long-term low-temperature start mode is entered; in the low-temperature start mode, according to the current stack temperature, the first preset current value and the first preset voltage value are determined to adjust the current value to the first preset current value, and the air compressor speed and the back pressure valve opening are controlled so that the stack temperature of the stack reaches the second preset voltage value; the stack temperature and the stack temperature rise rate are monitored to control the start of the target vehicle based on the stack temperature and the stack temperature rise rate. The present invention solves the problem of the inconsistency between the water production and the calorific value of a fuel cell during low-temperature startup. By controlling the reactant supply conditions, the fuel cell can be controlled to operate at a predetermined voltage and current at different temperatures to ensure constant calorific value and water production. The stack temperature and the stack temperature rise rate are used to determine whether to switch the startup mode until the stack reaches the predetermined temperature and starts successfully, so that the fuel cell can be started smoothly, thereby improving the efficiency of starting the fuel cell and enhancing the overall performance of the fuel cell.

[0052] Embodiment 2

[0053] Figure 3 This is a flow chart of a low temperature startup control method provided by the second embodiment of the present invention. The embodiment of the present invention further refines S140 on the basis of the above embodiment, and the embodiment of the present invention can be combined with various optional solutions in one or more of the above embodiments. Figure 3 As shown, the method includes:

[0054] S210: When a start signal is received, the ambient temperature of the environment to which the target vehicle belongs is obtained, and when the ambient temperature is lower than a first preset temperature threshold, a low-temperature start mode is started.

[0055] S220. In the low-temperature start mode, obtain the current battery stack temperature, and enter the long-term low-temperature start mode when the current battery stack temperature is less than the second preset temperature threshold and the temperature difference between the current battery stack temperature and the ambient temperature is less than the third preset temperature threshold.

[0056] S230. In the low-temperature startup mode, determine a first preset current value and a first preset voltage value according to the current stack temperature, adjust the current value to the first preset current value, and control the rotational speed of the air compressor and the opening degree of the backpressure valve so that the stack voltage of the fuel cell stack reaches a second preset voltage value.

[0057] S240. Monitor the stack temperature and the stack temperature rise rate to control the startup of the target vehicle based on the stack temperature and the stack temperature rise rate.

[0058] S250. When the current stack temperature is less than a fourth preset temperature threshold or the temperature difference is less than a fifth preset temperature threshold, enter the short-time low-temperature startup mode; wherein, the short-time low-temperature startup mode corresponds to a constant water production amount.

[0059] Among them, the fourth preset temperature threshold is a preset temperature value, for example, it can be -10°C. The fifth preset temperature threshold is a preset temperature value, for example, it can be 5°C. The short-time low-temperature startup mode means that the current ambient temperature of the target vehicle is low, and the fuel cell stack is only in a low-temperature environment for a short time, and it is necessary to enter the short-time low-temperature startup mode. The short-time low-temperature startup mode corresponds to a constant water production amount.

[0060] Specifically, in the low-temperature startup mode, the target vehicle can enter the fast low-temperature startup mode, the short-time low-temperature startup mode or the long-time low-temperature startup mode according to different preset conditions. In the low-temperature startup mode, the current temperature of the fuel cell stack of the target vehicle is collected by the stack temperature sensor configured in the fuel cell stack, and the obtained current stack temperature is subtracted from the current ambient temperature to obtain a temperature difference. Compare the current stack temperature with the fourth preset temperature threshold, and compare the temperature difference with the fifth preset temperature threshold. If the current stack temperature is less than the fourth preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the fifth preset temperature threshold, then the target vehicle enters the short-time low-temperature startup mode.

[0061] Exemplarily, in the low-temperature startup mode, the current temperature of the fuel cell stack of the target vehicle is collected by the stack temperature sensor configured in the fuel cell stack. For example, the current stack temperature is -15°C and the current ambient temperature is -10°C. The obtained current stack temperature is subtracted from the current ambient temperature to obtain a temperature difference. At this time, the temperature difference is -5°C. Assume that the fourth preset temperature threshold is -10°C and the fifth preset temperature threshold is 5°C. Compare the current stack temperature of -15°C with the fourth preset temperature threshold of -10°C, and compare the temperature difference of -5°C with the fifth preset temperature threshold of 5°C. It can be seen that when the current stack temperature is less than the fourth preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the fifth preset temperature threshold, then the target vehicle enters the short-time low-temperature startup mode at this time.

[0062] S260. Determine the second preset current value according to the current stack temperature, and adjust the water pump to operate at the lowest speed so that the current value is loaded to the second preset current value;

[0063] Among them, the second preset current value is a preset current value. For example, it can be 8A. The water pump is a cooling device installed on the fuel cell stack, which can be used to balance the stack temperature and play a role in heat dissipation.

[0064] Specifically, in the low-temperature start-up mode, the target vehicle can determine the second preset current value according to the current stack temperature. At this time, adjust the water pump to operate at the lowest speed, supply air and hydrogen to the fuel cell of the target vehicle, and the DC converter adjusts the current value of the fuel cell of the target vehicle to the second preset current value.

[0065] S270. Control the speed of the air compressor and the opening of the back pressure valve to reduce the output voltage of the stack, and monitor the stack temperature of the stack;

[0066] On the basis of the above steps, control the speed of the air compressor and the opening of the back pressure valve. Under the allowable conditions of the stack, try to reduce the output voltage of the stack, and continuously monitor the stack temperature of the fuel cell of the target vehicle.

[0067] S280. When the stack temperature is higher than the target preset temperature threshold, enter the fast low-temperature start-up mode;

[0068] Among them, the fast low-temperature start-up mode corresponds to the constant voltage loading mode.

[0069] In this embodiment, the target preset temperature threshold is a preset temperature value different from other preset temperature thresholds. For example, it is 10°C. The fast low-temperature start-up mode means that the current ambient temperature of the target vehicle is low and the target vehicle needs to be started quickly. During the process of reducing the output voltage of the stack, continuously monitor the stack temperature of the fuel cell of the target vehicle. When it is detected that the stack temperature is higher than the target preset temperature threshold, enter the fast low-temperature start-up mode. In the fast low-temperature start-up mode, the fuel cell works in the constant voltage loading mode.

[0070] Furthermore, in the fast low-temperature start-up mode, control the voltage value to be loaded to the second preset voltage value, and control the speed of the air compressor and the opening of the back pressure valve to keep the air stoichiometry ratio at the first ratio so that the current value of the stack reaches the preset limit current.

[0071] Among them, the first ratio is a preset ratio. For example, it can be 1.2. The preset limit current is a preset current value. For example, it can be 200A.

[0072] In actual application, when the long-term low-temperature start mode and the short-term low-temperature start mode are not entered in the low-temperature start mode, the rapid low-temperature start mode is entered according to the preset conditions of the stack temperature. The rapid low-temperature start mode is started in a constant voltage loading mode. At this time, the water pump runs at the lowest speed to supply air and hydrogen to the target vehicle fuel cell. The DC converter loads the working voltage of the fuel cell to the second preset voltage value, and controls the air compressor speed and the back pressure valve opening to keep the air metering ratio at the first ratio, such as 1.2. At this time, as the temperature rises, the stack current will gradually increase until it reaches the preset limit current, such as 200A, and then maintain the preset limit current to operate the fuel cell.

[0073] Optionally, the above method further includes:

[0074] Monitor the stack temperature of the battery stack; when the stack temperature is higher than a sixth preset temperature threshold, the startup is completed; when the current temperature is less than the sixth preset temperature threshold, return to execute monitoring the stack temperature of the battery stack.

[0075] The sixth preset temperature threshold is a preset temperature value, for example, may be 30°C.

[0076] In this embodiment, in the low-temperature start mode, the stack temperature sensor configured on the fuel cell will continuously monitor the temperature of the stack. When the temperature of the stack is higher than the sixth preset temperature threshold, it indicates that the low-temperature start of the target vehicle has been completed; if the temperature of the stack is lower than the sixth preset temperature threshold, it indicates that the low-temperature start is not completed, and it is necessary to continuously monitor the temperature of the fuel cell stack until the stack temperature is detected to be higher than the sixth preset temperature threshold, indicating that the start is completed.

[0077] The present invention discloses a low-temperature start control method, device, electronic device and storage medium. The technical solution disclosed in the present invention solves the problem of the inconsistency between the water production and the calorific value of a fuel cell during low-temperature start-up, and sets three start-up modes: rapid low-temperature start-up, short-term low-temperature start-up and long-term low-temperature start-up. By controlling the reactant supply conditions, the fuel cell can be controlled to operate at a predetermined voltage and current at different temperatures to ensure constant calorific value and water production. The start-up mode is determined by the stack temperature and the stack temperature rise rate until the stack reaches the predetermined temperature and starts successfully, so that the fuel cell can be started smoothly, thereby improving the efficiency of starting the fuel cell and improving the overall performance of the fuel cell.

[0078] Embodiment 3

[0079] Figure 4The flowchart of a low-temperature start control method provided in Embodiment 3 of the present invention. In this embodiment of the present invention, S110 and S120 are further refined on the basis of the above embodiments, and this embodiment of the present invention can be combined with each optional solution in one or more of the above embodiments. As Figure 4 shown, the method includes:

[0080] S310. When a start signal is received, obtain the ambient temperature of the target vehicle, and when the ambient temperature is lower than the first preset temperature threshold, turn on the low-temperature start mode.

[0081] S320. If the ambient temperature is greater than the first preset temperature threshold, start the target vehicle based on the normal-temperature start mode.

[0082] Among them, the normal-temperature start mode means that when the target vehicle is in a normal ambient temperature, the chemical substances in the fuel cell of the target vehicle can react normally, the charge and discharge efficiency is normal, and it can be smoothly started to supply power to the target vehicle.

[0083] Specifically, if the temperature of the current environment collected by the temperature sensor configured on the target vehicle is greater than the first preset temperature threshold, it indicates that the current ambient temperature does not meet the conditions for starting the target vehicle at low temperature, and the normal-temperature start mode can meet the starting function of the target vehicle.

[0084] S330. In the low-temperature start mode, obtain the current stack temperature, and when the current stack temperature is less than the second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold, enter the long-time low-temperature start mode.

[0085] S340. When the stack temperature is greater than the seventh preset temperature threshold and the stack temperature rise rate is greater than the preset rate threshold, enter the short-time low-temperature start mode.

[0086] Among them, the seventh preset temperature threshold is a preset temperature value. For example, it can be 0°C. The preset rate threshold is a preset value. For example, it can be 0.5°C / s.

[0087] In this embodiment, when the target vehicle is running in the low-temperature start mode, the temperature of the stack can be monitored in real time, and the stack temperature rise rate can be calculated in real time. When it is monitored that the stack temperature of the fuel cell of the target vehicle is greater than the seventh preset temperature threshold, and at this time the stack temperature rise rate of the fuel cell of the target vehicle is greater than the preset rate threshold, it can enter the short-time low-temperature start mode.

[0088] Optionally, if the stack temperature is less than the seventh preset temperature threshold or the stack temperature rise rate is less than the preset rate threshold, feedback to perform the operation of monitoring the stack temperature and the stack temperature rise rate until entering the short-time low-temperature start mode.

[0089] In this embodiment, when it is monitored that the stack temperature of the fuel cell of the target vehicle is lower than the seventh preset temperature threshold, or the stack temperature rise rate of the fuel cell of the target vehicle is lower than the preset rate threshold, it is necessary to continuously monitor the temperature of the fuel cell stack and the stack temperature rise rate of the fuel cell of the target vehicle until the stack temperature and the stack temperature rise rate meet the conditions for entering the short-term low-temperature start mode, and then enter the short-term low-temperature start mode.

[0090] S350. In the low-temperature start mode, determine the first preset current value and the first preset voltage value according to the current stack temperature, adjust the current value to the first preset current value, and control the rotational speed of the air compressor and the opening degree of the back pressure valve so that the stack temperature of the stack reaches the second preset voltage value.

[0091] S360. Monitor the stack temperature and the stack temperature rise rate to control the start of the target vehicle based on the stack temperature and the stack temperature rise rate.

[0092] The present invention discloses a low-temperature start control method, device, electronic device and storage medium. When a start signal is received, obtain the ambient temperature of the environment where the target vehicle is located, and when the ambient temperature is lower than the first preset temperature threshold, turn on the low-temperature start mode; if the ambient temperature is greater than the first preset temperature threshold, start the target vehicle based on the normal-temperature start mode; in the low-temperature start mode, obtain the current stack temperature, and when the current stack temperature is lower than the second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold, enter the long-term low-temperature start mode; when the stack temperature is greater than the seventh preset temperature threshold and the stack temperature rise rate is greater than the preset rate threshold, enter the short-term low-temperature start mode; in the low-temperature start mode, determine the first preset current value and the first preset voltage value according to the current stack temperature, adjust the current value to the first preset current value, and control the rotational speed of the air compressor and the opening degree of the back pressure valve so that the stack temperature of the stack reaches the second preset voltage value; monitor the stack temperature and the stack temperature rise rate to control the start of the target vehicle based on the stack temperature and the stack temperature rise rate. The present invention determines whether to switch the start mode through the stack temperature and the stack temperature rise rate until the stack reaches the predetermined temperature and starts successfully, so that the fuel cell can be started smoothly, improving the efficiency of starting the fuel cell and enhancing the overall performance of the fuel cell.

[0093] Embodiment 4

[0094] In the embodiment of the present invention, a specific implementation manner is used to introduce the process of the low-temperature start control method as follows Figure 5As shown. In this embodiment, the low-temperature start mode can be specifically divided into three modes: fast low-temperature start mode, short-time low-temperature start mode, and long-time low-temperature start mode. The entire process of the target vehicle's low-temperature start can be divided into three stages: the first stage, select the start mode as the low-temperature start mode or the normal-temperature start mode according to the ambient temperature; the second stage, select the low-temperature start mode as the fast low-temperature start mode, short-time low-temperature start mode, or long-time low-temperature start mode according to the stack temperature; the third stage, switch the start mode according to the stack temperature and the stack temperature rise rate until the start is completed.

[0095] The embodiment of the present invention provides the flow of a specific low-temperature start control method for a fuel cell. Refer to Figure 6 . When the low-temperature start function of the target vehicle starts, the ambient temperature sensor configured on the target vehicle monitors the current ambient temperature value:

[0096] When the ambient temperature is not lower than the preset temperature T1 (for example, -5°C), enter the normal-temperature start mode and the start is completed; when the ambient temperature is lower than temperature T1, enter the low-temperature start mode.

[0097] If entering the low-temperature start mode, monitor the value of the fuel cell stack temperature sensor of the target vehicle. When the stack temperature is lower than the preset temperature T2 (for example, -20°C), and the difference between the stack temperature and the current environment is less than the preset temperature T3 (for example, 3°C), it means that the ambient temperature of the target vehicle is low and the fuel cell stack of the target vehicle has been in a low-temperature environment for a long time. At this time, enter the long-time low-temperature start mode. The long-time low-temperature start mode works in a way of constant heat generation and water production. The specific working process is as follows: the control device can determine the set values of the voltage and current of the fuel cell according to the stack temperature; the water pump does not start in this mode, air and hydrogen are supplied to the fuel cell, the DC converter inputs and loads current to the fuel cell until the input current of the fuel cell reaches the preset current; control the speed of the air compressor and the opening of the back pressure valve so that the fuel cell works in a low-flow high-pressure state at this time until the stack voltage reaches the preset voltage; monitor the stack temperature and the stack temperature rise rate until the stack temperature is higher than the preset temperature T6 (for example, 0°C), and the temperature rise rate is greater than (for example, 0.5°C / s), then switch to the short-time low-temperature start mode.

[0098] If the fuel cell of the target vehicle does not enter the long-term low-temperature start mode in the low-temperature start mode, it is determined whether the stack temperature is lower than the preset temperature T4 (for example, -10°C), or the difference between the stack temperature and the current environment is less than the preset temperature T5 (for example, 5°C), then the short-term low-temperature start mode is entered. The short-term low-temperature start mode works in a constant water production mode. The specific working process is: the fuel cell determines the current setting value flowing into the fuel cell according to the stack temperature; the water pump runs at the lowest speed to supply air and hydrogen to the fuel cell, and the DC converter loads the input current to the fuel cell to the preset current; the air compressor speed and the back pressure valve opening are controlled. At this time, under the conditions allowed by the stack, the output voltage of the fuel cell stack is reduced as much as possible, and the stack temperature sensor configured in the fuel cell collects the stack temperature and monitors the stack temperature until the stack temperature is higher than the preset temperature T7 (for example, 10°C), and switches to the fast low-temperature start mode.

[0099] When in low-temperature start mode, if neither long-term low-temperature start mode nor short-term low-temperature start mode is entered, the fast low-temperature start mode is entered. The fast low-temperature start mode works in a constant voltage loading manner. The specific working process is: the water pump runs at the lowest speed to supply air and hydrogen to the fuel cell, and the DC converter loads the fuel cell input current to the preset current; the air compressor speed and the back pressure valve opening are controlled to maintain the air metering ratio at a preset ratio, such as 1.2; as the temperature of the fuel cell stack rises, the stack current will gradually increase until it reaches the preset current, such as 200A, and maintain this condition; thereafter, the stack temperature is continuously monitored until the stack temperature is higher than the preset value temperature T8, such as 30°C, at which time the low-temperature start function of the target vehicle is completed.

[0100] The technical solution disclosed in the present invention solves the problem of the inconsistency between the water production and the calorific value of the fuel cell during low-temperature startup, and sets three startup modes: rapid low-temperature startup, short-term low-temperature startup and long-term low-temperature startup. By controlling the reactant supply conditions, the fuel cell can be controlled to operate at a predetermined voltage and current at different temperatures to ensure constant calorific value and water production. The startup mode is determined by the stack temperature and the stack temperature rise rate until the stack reaches the predetermined temperature and starts successfully, so that the fuel cell can be started smoothly, thereby improving the efficiency of starting the fuel cell.

[0101] Embodiment 5

[0102] Figure 7 This is a schematic diagram of the structure of a low-temperature startup control device provided according to Embodiment 5 of the present invention. The device can execute a low-temperature startup control method provided in the embodiment of the present invention. The device includes:

[0103] The low-temperature start-up enabling module 410 is configured to obtain the ambient temperature of the environment to which the target vehicle belongs when receiving a start signal, and enable the low-temperature start-up mode when the ambient temperature is lower than the first preset temperature threshold;

[0104] The long-time low-temperature start-up module 420 is configured to obtain the current stack temperature in the low-temperature start-up mode, and enter the long-time low-temperature start-up mode when the current stack temperature is less than the second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold;

[0105] The low-temperature start-up adjustment module 430 is configured to determine a first preset current value and a first preset voltage value according to the current stack temperature in the low-temperature start-up mode, adjust the current value to the first preset current value, and control the rotational speed of the air compressor and the opening degree of the back pressure valve so that the stack voltage of the stack reaches the second preset voltage value;

[0106] The vehicle start-up control module 440 is configured to monitor the stack temperature and the stack temperature rise rate, and control the start-up of the target vehicle based on the stack temperature and the stack temperature rise rate.

[0107] Based on the above embodiments, the device further includes:

[0108] The short-time low-temperature start-up module is configured to enter the short-time low-temperature start-up mode when the current stack temperature is less than the fourth preset temperature threshold or the temperature difference is less than the fifth preset temperature threshold;

[0109] The short-time low-temperature adjustment module is configured to determine a second preset current value according to the current stack temperature, and adjust the water pump to operate at the lowest rotational speed so that the current value is loaded to the second preset current value;

[0110] The stack temperature monitoring module is configured to control the rotational speed of the air compressor and the opening degree of the back pressure valve to reduce the output voltage of the stack, and monitor the stack temperature of the stack;

[0111] The fast low-temperature start-up module is configured to enter the fast low-temperature start-up mode when the stack temperature is higher than the target preset temperature threshold.

[0112] Based on the above embodiments, the fast low-temperature start-up module further includes a voltage control sub-module, which is specifically configured to control the voltage value to be loaded to the second preset voltage value in the fast low-temperature start-up mode, and control the rotational speed of the air compressor and the opening degree of the back pressure valve to maintain the air-fuel ratio at the first ratio so that the current value of the stack reaches the preset limit current.

[0113] Based on the above embodiments, the voltage control sub-module includes: a stack temperature monitoring unit, a start-up completion unit, and a temperature monitoring return unit.

[0114] The stack temperature monitoring unit is configured to monitor the stack temperature of the stack;

[0115] A startup completion unit, configured to complete startup when the stack temperature is higher than a sixth preset temperature threshold;

[0116] A temperature monitoring return unit, configured to return and execute monitoring of the stack temperature when the current temperature is lower than the sixth preset temperature threshold.

[0117] Based on the above embodiments, the device further includes:

[0118] A short-time low-temperature startup sub-module, configured to enter a short-time low-temperature startup mode when the stack temperature is greater than a seventh preset temperature threshold and the stack temperature rise rate is greater than a preset rate threshold.

[0119] Based on the above embodiments, the device further includes:

[0120] A feedback execution monitoring sub-module, configured to, when the stack temperature is lower than the seventh preset temperature threshold or the stack temperature rise rate is lower than the preset rate threshold, feedback and execute operations of monitoring the stack temperature and the stack temperature rise rate until entering the short-time low-temperature startup mode.

[0121] Based on the above embodiments, the device further includes:

[0122] A normal-temperature startup sub-module, configured to start the target vehicle based on the normal-temperature startup mode if the ambient temperature is greater than a first preset temperature threshold.

[0123] The present invention discloses a low-temperature start control method, device, electronic device and storage medium. When a start signal is received, the ambient temperature of the environment to which the target vehicle belongs is obtained, and when the ambient temperature is lower than a first preset temperature threshold, the low-temperature start mode is turned on; in the low-temperature start mode, the current stack temperature is obtained, and when the current stack temperature is lower than a second preset temperature threshold, and the temperature difference between the current stack temperature and the ambient temperature is lower than a third preset temperature threshold, the long-term low-temperature start mode is entered; in the low-temperature start mode, according to the current stack temperature, the first preset current value and the first preset voltage value are determined to adjust the current value to the first preset current value, and the air compressor speed and the back pressure valve opening are controlled so that the stack temperature of the stack reaches the second preset voltage value; the stack temperature and the stack temperature rise rate are monitored to control the start of the target vehicle based on the stack temperature and the stack temperature rise rate. The present invention solves the problem of the inconsistency between the water production and the calorific value of the fuel cell during low-temperature start-up, and sets three start-up modes: quick low-temperature start-up / short-time low-temperature start-up / long-time low-temperature start-up. By controlling the reactant supply conditions, the fuel cell can be controlled to operate at a predetermined voltage and current at different temperatures to ensure constant calorific value and water production. The start-up mode is determined by the stack temperature and the stack temperature rise rate until the stack reaches the predetermined temperature and starts successfully, so that the fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is improved.

[0124] Embodiment 6

[0125] Figure 8 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0126] like Figure 8As shown, the electronic device 10 includes at least one processor 11 and a memory communicatively connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc. The memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0127] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0128] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the road surface recognition method.

[0129] In some embodiments, the road surface recognition method can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the road surface recognition method described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the road surface recognition method by any other appropriate means (e.g., by means of firmware).

[0130] The various embodiments of the systems and techniques described above in this specification can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems-on-chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be a special-purpose or general-purpose programmable processor that receives data and instructions from, and transmits data and instructions to, a storage system, at least one input device, and at least one output device.

[0131] The computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer programs can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0132] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0133] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, speech input, or tactile input).

[0134] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0135] The computing system can include a client and a server. The client and the server are generally remote from each other and typically interact through a communication network. The relationship between the client and the server is generated by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services. It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein. The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A low-temperature starting control method, characterized in that, Including: When a start signal is received, obtain the ambient temperature of the environment to which the target vehicle belongs, and when the ambient temperature is lower than the first preset temperature threshold, turn on the low-temperature start mode; In the low-temperature start mode, obtain the current stack temperature, and when the current stack temperature is less than the second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than the third preset temperature threshold, enter the long-time low-temperature start mode; In the low-temperature start mode, determine a first preset current value and a first preset voltage value according to the current stack temperature, adjust the current value to the first preset current value, and control the air compressor speed and the back pressure valve opening degree so that the stack voltage of the fuel cell stack reaches the second preset voltage value; Monitor the stack temperature and the stack temperature rise rate to control the start of the target vehicle based on the stack temperature and the stack temperature rise rate; If in the low-temperature start mode, the fuel cell of the target vehicle does not enter the long-time low-temperature start mode, determine whether the current stack temperature is less than the fourth preset temperature threshold, or whether the difference between the current stack temperature and the current environment is less than the fifth preset temperature threshold; When the current stack temperature is less than the fourth preset temperature threshold, or the temperature difference is less than the fifth preset temperature threshold, enter the short-time low-temperature start mode; wherein, the short-time low-temperature start mode corresponds to a constant water production amount; Determine the second preset current value according to the current stack temperature, and adjust the water pump to operate at the lowest speed so that the current value is loaded to the second preset current value; Control the air compressor speed and the back pressure valve opening degree to reduce the output voltage of the fuel cell stack, and monitor the stack temperature of the fuel cell stack; When the stack temperature is higher than the target preset temperature threshold, enter the fast low-temperature start mode; Wherein, the fast low-temperature start mode corresponds to a constant voltage loading mode.

2. The method according to claim 1, characterized in that, Also including: In the fast low-temperature start mode, control the voltage value to be loaded to the second preset voltage value, and control the air compressor speed and the back pressure valve opening degree to keep the air stoichiometry ratio at the first ratio so that the current value of the fuel cell stack reaches the preset limit current.

3. The method according to claim 2, characterized in that Also including: Monitor the stack temperature of the fuel cell stack; When the stack temperature is higher than the sixth preset temperature threshold, the start is completed; When the stack temperature is less than the sixth preset temperature threshold, return to monitor the stack temperature of the fuel cell stack.

4. The method according to claim 1, wherein Also including: When the stack temperature is greater than the seventh preset temperature threshold and the stack temperature rise rate is greater than the preset rate threshold, enter the short-time low-temperature start mode.

5. The method according to claim 4, characterized in that Also including: When the stack temperature is less than the seventh preset temperature threshold, or the stack temperature rise rate is less than the preset rate threshold, feedback to perform the operations of monitoring the stack temperature and the stack temperature rise rate until entering the short-time low-temperature start mode.

6. The method according to claim 1, characterized in that, Also including: If the ambient temperature is greater than the first preset temperature threshold, start the target vehicle based on the normal temperature start mode.

7. A low-temperature start control device, the device includes: A low-temperature start-up enabling module, configured to obtain the ambient temperature of the environment to which the target vehicle belongs when receiving a start signal, and enable a low-temperature start-up mode when the ambient temperature is lower than a first preset temperature threshold; A long-time low-temperature start-up module, configured to obtain the current stack temperature in the low-temperature start-up mode, and enter a long-time low-temperature start-up mode when the current stack temperature is less than a second preset temperature threshold and the temperature difference between the current stack temperature and the ambient temperature is less than a third preset temperature threshold; A low-temperature start-up adjustment module, configured to determine a first preset current value and a first preset voltage value according to the current stack temperature in the low-temperature start-up mode, so as to adjust the current value to the first preset current value, and control the air compressor speed and the back pressure valve opening degree, so that the stack temperature of the fuel cell reaches the second preset voltage value; A vehicle start-up control module, configured to monitor the stack temperature and the stack temperature rise rate, so as to control the start-up of the target vehicle based on the stack temperature and the stack temperature rise rate; A short-time low-temperature start-up module, configured to determine whether the current stack temperature is less than a fourth preset temperature threshold, or whether the difference between the current stack temperature and the current environment is less than a fifth preset temperature threshold if the fuel cell of the target vehicle does not enter the long-time low-temperature start-up mode in the low-temperature start-up mode; Enter a short-time low-temperature start-up mode when the current stack temperature is less than the fourth preset temperature threshold, or the temperature difference is less than the fifth preset temperature threshold; wherein, the short-time low-temperature start-up mode corresponds to a constant water production amount; A short-time low-temperature adjustment module, configured to determine a second preset current value according to the current stack temperature, and adjust the water pump to operate at the lowest speed, so that the current value is loaded to the second preset current value; A stack temperature monitoring module, configured to control the air compressor speed and the back pressure valve opening degree to reduce the output voltage of the stack, and monitor the stack temperature of the fuel cell; A fast low-temperature start-up module, configured to enter a fast low-temperature start-up mode when the stack temperature is higher than a target preset temperature threshold; wherein, the fast low-temperature start-up mode corresponds to a constant voltage loading mode.

8. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, the at least one processor is enabled to execute the low-temperature start-up control method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to execute the low-temperature start-up control method according to any one of claims 1-6 when executed.

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