Fuel cell engine control method and device, fuel cell vehicle and medium

Abstract

The invention discloses a fuel cell engine control method and device, a fuel cell vehicle and a medium. The method comprises the following steps: acquiring an engine state signal, inlet water temperature and outlet water temperature of a fuel cell engine, and determining that the fuel cell engine is in a low-temperature starting state or a normal-temperature starting state; when the fuel cell engine is in a low-temperature starting state or a normal-temperature starting state, detecting a first monomer voltage corresponding to the fuel cell stack by adopting a fuel cell voltage inspection module, and determining whether the fuel cell stack has a starting antipole fault or not according to the first monomer voltage and a multi-stage starting antipole threshold value; and when it is determined that the fuel cell stack does not have the start-up antipole fault, controlling the fuel cell engine to enter a normal operation state, and determining whether the fuel cell stack has the operation antipole fault according to the detected second monomer voltage and the multi-stage operation antipole threshold corresponding to the fuel cell stack. According to the invention, multi-level classification processing of the antipole fault of the fuel cell engine is realized.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a fuel cell engine control method, device, fuel cell vehicle, and medium. Background Technology

[0002] Fuel cell vehicles (FCVs) are electric vehicles that use onboard fuel cell devices to generate electricity. Their core technology involves directly generating electricity through a hydrogen-oxygen electrochemical reaction to drive an electric motor, and they feature zero emissions and high efficiency.

[0003] Reverse polarity in fuel cell stacks can impact fuel cell vehicles in terms of performance degradation, material damage, and safety hazards. Reverse polarity refers to the phenomenon where, during stack operation, insufficient supply of reactant gas (usually hydrogen at the anode) causes the voltage of a single cell to drop below zero volts, while the anode potential exceeds that of the cathode. Generally, fuel cell stacks can withstand slight reverse polarity, but this resistance varies under different ambient temperatures. When the reverse polarity voltage reaches 4V to 5V, it can lead to stack failure or damage in the fuel cell engine, and even pose safety hazards. Summary of the Invention

[0004] This invention provides a fuel cell engine control method, device, fuel cell vehicle, and medium to solve the problem that current fuel cell engines cannot be controlled differently for reverse polarity faults under different conditions, thus failing to guarantee fuel cell performance and avoid safety hazards.

[0005] According to one aspect of the present invention, a fuel cell engine control method is provided, the fuel cell engine control method comprising:

[0006] The engine status signal, inlet water temperature and outlet water temperature of the fuel cell engine are acquired, and the fuel cell engine is determined to be in low temperature start-up state or normal temperature start-up state based on the engine status signal, inlet water temperature and outlet water temperature.

[0007] When the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state, the fuel cell voltage inspection module is used to detect the first cell voltage of the fuel cell stack, and the start-up reverse polarity fault is determined based on the first cell voltage and the multi-level start-up reverse polarity threshold.

[0008] Once it is determined that there is no reverse polarity fault during startup of the fuel cell stack, the fuel cell engine is controlled to enter normal operation. Based on the detected second cell voltage and multi-level reverse polarity threshold of the fuel cell stack, it is determined whether there is a reverse polarity fault during operation of the fuel cell stack.

[0009] Optionally, the fuel cell engine is determined to be in a low-temperature start-up state or a normal-temperature start-up state based on the engine status signal, inlet water temperature, and outlet water temperature, including:

[0010] The status of the fuel cell engine is determined based on the engine status signal, indicating whether it is in standby or start-up mode.

[0011] When the fuel cell engine is in standby or start-up mode, if the inlet water temperature is greater than the first temperature threshold and the outlet water temperature is greater than the second temperature threshold, then the fuel cell engine is determined to be in normal temperature start-up mode.

[0012] If the inlet water temperature is less than or equal to the first temperature threshold and the outlet water temperature is less than or equal to the second temperature threshold, then the fuel cell engine is determined to be in a low-temperature start-up state.

[0013] If the inlet water temperature is less than or equal to the first temperature threshold, or the outlet water temperature is less than or equal to the second temperature threshold, then the fuel cell engine is determined to be in a low-temperature start-up state.

[0014] Optionally, the multi-level power-on reverse polarity threshold includes a first-level low-temperature power-on reverse polarity threshold, a second-level low-temperature power-on reverse polarity threshold, and a third-level low-temperature power-on reverse polarity threshold;

[0015] Determining whether a fuel cell stack has a start-up reverse polarity fault based on the first cell voltage and the multi-stage start-up reverse polarity threshold includes:

[0016] If the voltage of the first cell is greater than the low-temperature first-stage start-up reverse polarity threshold, then it is determined that there is no start-up reverse polarity fault in the fuel cell stack.

[0017] If the voltage of the first cell is less than or equal to the low-temperature first-stage reverse polarity threshold and the voltage of the first cell is greater than the low-temperature second-stage reverse polarity threshold, then it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated.

[0018] If the voltage of the first cell is less than or equal to the low-temperature second-stage start-up reverse polarity threshold, and the voltage of the first cell is greater than the low-temperature third-stage start-up reverse polarity threshold, then it is determined that there is a start-up reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to shut down.

[0019] If the voltage of the first cell is less than or equal to the low-temperature third stage start-up reverse polarity threshold, it is determined that there is a start-up reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to stop abruptly.

[0020] Optionally, the multi-level power-on reverse polarity threshold includes a first-level power-on reverse polarity threshold at room temperature, a second-level power-on reverse polarity threshold at room temperature, and a third-level power-on reverse polarity threshold at room temperature.

[0021] Determining whether a fuel cell stack has a start-up reverse polarity fault based on the first cell voltage and the multi-stage start-up reverse polarity threshold includes:

[0022] If the voltage of the first cell is greater than the first-stage reverse polarity threshold at room temperature, then it is determined that there is no reverse polarity fault during startup in the fuel cell stack.

[0023] If the voltage of the first cell is less than or equal to the first-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the second-stage reverse polarity threshold at room temperature, then it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated.

[0024] If the voltage of the first cell is less than or equal to the second-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the third-stage reverse polarity threshold at room temperature, then it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is shut down.

[0025] If the voltage of the first cell is less than or equal to the third stage reverse polarity threshold at room temperature, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to stop abruptly.

[0026] Optionally, the fuel cell engine control method also includes:

[0027] Upon receiving a power-on reverse polarity warning command, the voltage of the corresponding individual cell in the fuel cell stack is increased, wherein the increased individual cell voltage is higher than the first individual cell voltage.

[0028] Optionally, the multi-level operating reversal threshold includes a first-level operating reversal threshold, a second-level operating reversal threshold, and a third-level operating reversal threshold;

[0029] Based on the detected second cell voltage and multi-stage reverse polarity threshold of the fuel cell stack, determine whether the fuel cell stack has a reverse polarity fault, including:

[0030] If the voltage of the second cell is greater than the first-stage reverse polarity threshold, the fuel cell engine will continue to operate in normal mode.

[0031] If the voltage of the second cell is less than or equal to the first-stage reverse polarity threshold and the voltage of the second cell is greater than the second-stage reverse polarity threshold, then it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated.

[0032] If the voltage of the second cell is less than or equal to the second-stage reverse polarity threshold and the voltage of the second cell is greater than the third-stage reverse polarity threshold, then the power of the fuel cell engine is limited.

[0033] If the voltage of the second cell is less than or equal to the third-stage reverse polarity threshold, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is shut down.

[0034] Optionally, the multi-level power-on reversal threshold includes a low-temperature first-level power-on reversal threshold, a low-temperature second-level power-on reversal threshold, a low-temperature third-level power-on reversal threshold, a normal-temperature first-level power-on reversal threshold, a normal-temperature second-level power-on reversal threshold, and a normal-temperature third-level power-on reversal threshold.

[0035] The low-temperature first-stage power-on reverse polarity threshold is lower than the normal-temperature first-stage power-on reverse polarity threshold.

[0036] The low-temperature second-stage start-up reverse polarity threshold is less than the normal-temperature second-stage start-up reverse polarity threshold;

[0037] The low-temperature third-stage startup reverse polarity threshold is less than the normal-temperature third-stage startup reverse polarity threshold.

[0038] According to another aspect of the present invention, a fuel cell engine control device is provided, the fuel cell engine control device comprising:

[0039] The start-up status determination module is used to acquire the engine status signal, inlet water temperature and outlet water temperature of the fuel cell engine, and determine whether the fuel cell engine is in a low temperature start-up state or a normal temperature start-up state based on the engine status signal, inlet water temperature and outlet water temperature.

[0040] The start-up reverse polarity fault determination module is used to detect the first cell voltage of the fuel cell stack when the fuel cell engine is in a low temperature start-up state or a normal temperature start-up state, and determine whether there is a start-up reverse polarity fault in the fuel cell stack based on the first cell voltage and the multi-level start-up reverse polarity threshold.

[0041] The reverse polarity fault determination module is used to control the fuel cell engine to enter normal operation when it is determined that there is no reverse polarity fault during startup of the fuel cell stack, and to determine whether there is a reverse polarity fault in the fuel cell stack based on the detected second cell voltage and multi-level reverse polarity threshold.

[0042] According to another aspect of the present invention, a fuel cell vehicle is provided, the fuel cell vehicle including a fuel cell engine;

[0043] Fuel cell vehicles also include:

[0044] At least one processor; and,

[0045] A memory that is communicatively connected to at least one processor; wherein,

[0046] The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to execute the fuel cell engine control method of any embodiment of the present invention.

[0047] According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to execute and implement the fuel cell engine control method of any embodiment of the present invention.

[0048] The technical solution of this invention acquires the engine status signal, inlet water temperature, and outlet water temperature of the fuel cell engine. Based on these signals, it determines whether the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state, thus differentiating between low-temperature and normal-temperature start-up reverse polarity fault handling and enriching the reverse polarity fault handling scenarios. When the fuel cell engine is in either a low-temperature or normal-temperature start-up state, a fuel cell voltage monitoring module detects the first cell voltage corresponding to the fuel cell stack. Based on the first cell voltage and multi-level start-up reverse polarity thresholds, it determines whether the fuel cell stack has a start-up reverse polarity fault, enabling multi-level classification and processing at different start-up fault levels to protect the fuel cell engine and avoid damage risks. When it is determined that the fuel cell stack does not have a start-up reverse polarity fault, the fuel cell engine is controlled to enter a normal operating state. Based on the detected second cell voltage and multi-level operating reverse polarity thresholds, it determines whether the fuel cell stack has an operating reverse polarity fault. To achieve comprehensive protection of the fuel cell engine, reverse polarity fault handling under normal operating conditions is also considered, and frequent engine start-up and shutdown causing performance degradation is avoided.

[0049] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a flowchart of a fuel cell engine control method provided according to an embodiment of the present invention;

[0052] Figure 2 This is a flowchart of a fuel cell engine control method provided according to an embodiment of the present invention;

[0053] Figure 3 This is a schematic diagram of the structure of a fuel cell engine control device according to an embodiment of the present invention;

[0054] Figure 4 This is a schematic diagram of the structure of a fuel cell vehicle that implements the fuel cell engine control method of the present invention. Detailed Implementation

[0055] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0056] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] Figure 1 This invention provides a flowchart of a fuel cell engine control method. This embodiment is applicable to distinguishing and confirming reverse polarity faults in fuel cell engines operating at normal temperature, low temperature, and normal conditions. This fuel cell engine control method can be executed by a fuel cell engine control device, which can be implemented in hardware and / or software and can be configured in a fuel cell vehicle. Figure 1 As shown, the fuel cell engine control method includes:

[0058] S110: Obtain the engine status signal, inlet water temperature and outlet water temperature of the fuel cell engine, and determine whether the fuel cell engine is in low temperature start-up state or normal temperature start-up state based on the engine status signal, inlet water temperature and outlet water temperature.

[0059] To provide comprehensive protection for fuel cell engines, it is necessary to consider whether the fuel cell engine is operating at low temperature or normal temperature. The reverse polarity resistance of the fuel cell stack differs depending on whether the fuel cell engine is operating at low temperature or normal temperature. This will enable the protection of the fuel cell stack, maintain its stability and efficiency, and avoid potential safety hazards.

[0060] As can be seen, when considering whether the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state, it is first necessary to collect the engine status signal of the fuel cell engine. The engine status signal is used to determine whether the fuel cell engine is in a standby state or a start-up state. Since the inlet water temperature and outlet water temperature are considered to be the same when the fuel cell engine is in a standby state or a start-up state, the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state based on the inlet water temperature and outlet water temperature.

[0061] The fuel cell engine is determined to be in a low-temperature start-up state or a normal-temperature start-up state based on the inlet and outlet water temperatures. The inlet and outlet water temperatures of the fuel cell engine can be collected in real time using existing data acquisition methods, and this embodiment does not impose any restrictions on this.

[0062] In this embodiment, the inlet water temperature and outlet water temperature must meet certain conditions to distinguish whether the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state. Specifically, when the fuel cell engine is in a standby state or a start-up state, if the inlet water temperature is greater than the first temperature threshold and the outlet water temperature is greater than the second temperature threshold, then it is determined that the fuel cell engine is in a normal-temperature start-up state, and then fault protection is performed by reversing the polarity when the fuel cell engine is in a normal-temperature start-up state.

[0063] Furthermore, when the fuel cell engine is in standby or start-up mode, if the inlet water temperature is less than or equal to the first temperature threshold and the outlet water temperature is less than or equal to the second temperature threshold, or if the inlet water temperature is less than or equal to the first temperature threshold or the outlet water temperature is less than or equal to the second temperature threshold, then the fuel cell engine is determined to be in a low-temperature start-up state, and fault protection is performed by reversing the polarity when the fuel cell engine is in a low-temperature start-up state.

[0064] The first temperature threshold can be selected and set according to the inlet water temperature to distinguish the start-up status of the fuel cell engine, and the second temperature threshold can be selected and set according to the outlet water temperature to distinguish the start-up status of the fuel cell engine. In this embodiment, the specific values ​​of the first temperature threshold and the second temperature threshold are not specially limited.

[0065] Optionally, to ensure the accuracy of judging the inlet and outlet water temperatures, additional inlet and outlet water temperature deviation values ​​can be set, thereby achieving accurate differentiation between the fuel cell engine operating at low temperatures and operating at normal temperatures. Furthermore, the relationship between the inlet water temperature and the first temperature threshold and the inlet water temperature deviation value, as well as the relationship between the outlet water temperature and the second temperature threshold and the outlet water temperature deviation value, are determined.

[0066] For example, considering the deviation between the first temperature threshold t1 and the second temperature threshold t2, when the fuel cell engine is in standby or start-up state, if the inlet water temperature T FCin Greater than the first temperature threshold t1, i.e., T FCin >t1±δin, where δin is the inlet water temperature deviation value, and the outlet water temperature T FCout Greater than the second temperature threshold t2, i.e., T FCout If > t2±δout, where δout is the outlet water temperature deviation value, then the fuel cell engine is determined to be in normal temperature start-up state.

[0067] Similarly, when the fuel cell engine is in standby or start-up mode, if the inlet water temperature T... FCin Less than or equal to the first temperature threshold t1, i.e., T FCin ≤t1±δin, and outlet water temperature T FCout Less than or equal to the second temperature threshold t2, i.e., T FCout ≤t2±δout, or, inlet water temperature T FCin Less than or equal to the first temperature threshold t1, i.e., T FCin ≤t1±δin, or outlet water temperature T FCout Less than or equal to the second temperature threshold t2, i.e., T FCout If ≤t2±δout, then the fuel cell engine is determined to be in a low-temperature start-up state.

[0068] Based on the above embodiments, when the fuel cell engine is in standby or start-up state, the relevant hardware of the fuel cell (such as the voltage inspection module below) needs to be tested to ensure that there are no hardware faults before it can be started.

[0069] S120. When the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state, the fuel cell voltage inspection module is used to detect the first cell voltage corresponding to the fuel cell stack, and the start-up reverse polarity fault is determined based on the first cell voltage and the multi-level start-up reverse polarity threshold.

[0070] Among them, the Cell Voltage Monitor (CVM) module is the core monitoring device of the fuel cell system. It is mainly used to collect real-time voltage data of individual fuel cell stack cells to ensure the stable operation of the fuel cell system.

[0071] The first cell voltage is obtained in real time by the fuel cell voltage monitoring module when the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state. That is, the corresponding first cell voltage can be detected in real time when the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state. The first cell voltage is the minimum value of the fuel cell cell voltage at this time.

[0072] In this embodiment, when the fuel cell engine is in a low-temperature start-up state, the fuel cell engine uses a low-temperature start-up threshold for fault protection. The multi-level start-up reverse polarity thresholds of the fuel cell stack corresponding to the low-temperature start-up state are the first low-temperature start-up reverse polarity threshold, the second low-temperature start-up reverse polarity threshold, and the third low-temperature start-up reverse polarity threshold. The first low-temperature start-up reverse polarity threshold is greater than the second low-temperature start-up reverse polarity threshold, and the second low-temperature start-up reverse polarity threshold is greater than the third low-temperature start-up reverse polarity threshold. Thus, warning, normal shutdown, and emergency shutdown are processed through different start-up reverse polarity thresholds.

[0073] Specifically, if the voltage of the first cell is greater than the low-temperature first-stage reverse polarity threshold, it is determined that there is no reverse polarity fault in the fuel cell stack; if the voltage of the first cell is less than or equal to the low-temperature first-stage reverse polarity threshold and is greater than the low-temperature second-stage reverse polarity threshold, it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated; if the voltage of the first cell is less than or equal to the low-temperature second-stage reverse polarity threshold and is greater than the low-temperature third-stage reverse polarity threshold, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is shut down; if the voltage of the first cell is less than or equal to the low-temperature third-stage reverse polarity threshold, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is stopped abruptly.

[0074] Furthermore, when the fuel cell engine is in a normal temperature start-up state, the fuel cell engine uses a normal temperature start-up threshold for fault protection. The multi-level start-up reverse polarity thresholds of the fuel cell stack corresponding to the normal temperature start-up state are the first level normal temperature start-up reverse polarity threshold, the second level normal temperature start-up reverse polarity threshold, and the third level normal temperature start-up reverse polarity threshold. Among them, the first level normal temperature start-up reverse polarity threshold is greater than the second level normal temperature start-up reverse polarity threshold, and the second level normal temperature start-up reverse polarity threshold is greater than the third level normal temperature start-up reverse polarity threshold. Thus, warning, normal shutdown, and emergency shutdown are handled through different start-up reverse polarity thresholds.

[0075] Specifically, if the voltage of the first cell is greater than the first-stage reverse polarity threshold at room temperature, it is determined that there is no reverse polarity fault in the fuel cell stack. If the voltage of the first cell is less than or equal to the first-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the second-stage reverse polarity threshold at room temperature, it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated. If the voltage of the first cell is less than or equal to the second-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the third-stage reverse polarity threshold at room temperature, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is shut down. If the voltage of the first cell is less than or equal to the third-stage reverse polarity threshold at room temperature, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is stopped abruptly.

[0076] Based on the above, upon receiving a reverse polarity warning command upon startup, the voltage of the corresponding individual cell in the fuel cell stack is increased, wherein the increased individual cell voltage is higher than the first individual cell voltage. It is understood that the methods for increasing the voltage of the corresponding individual cell in the fuel cell stack can include, but are not limited to, opening the drain valve, increasing the hydrogen pressure, or increasing the hydrogen pump speed; this embodiment does not impose any limitations on these methods.

[0077] It should also be noted that the reverse polarity fault thresholds differ under different power-on states. Specifically, the multi-level reverse polarity thresholds include the low-temperature first-level reverse polarity threshold, the low-temperature second-level reverse polarity threshold, the low-temperature third-level reverse polarity threshold, the normal-temperature first-level reverse polarity threshold, the normal-temperature second-level reverse polarity threshold, and the normal-temperature third-level reverse polarity threshold. The reverse polarity thresholds under normal-temperature power-on states are all greater than those under low-temperature power-on states. That is, the low-temperature first-level reverse polarity threshold is less than the normal-temperature first-level reverse polarity threshold, the low-temperature second-level reverse polarity threshold is less than the normal-temperature second-level reverse polarity threshold, and the low-temperature third-level reverse polarity threshold is less than the normal-temperature third-level reverse polarity threshold.

[0078] S130. When it is determined that there is no reverse polarity fault during startup of the fuel cell stack, the fuel cell engine is controlled to enter the normal operation state, and the reverse polarity fault during operation of the fuel cell stack is determined based on the second cell voltage and multi-level reverse polarity threshold of the fuel cell stack obtained by detection.

[0079] Specifically, when the fuel cell engine is in a low-temperature start-up state, if the voltage of the first cell is greater than the low-temperature first-stage start-up reverse polarity threshold, and when the fuel cell engine is in a normal-temperature start-up state, if the voltage of the first cell is greater than the normal-temperature first-stage start-up reverse polarity threshold, it can be determined that there is no start-up reverse polarity fault in the fuel cell stack, thereby controlling the fuel cell engine to enter a normal operating state.

[0080] On the other hand, when the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state, if it is determined that there is a start-up reverse polarity fault in the fuel cell stack and a start-up reverse polarity warning command is generated, the voltage of the corresponding individual cell in the fuel cell stack can be increased. Furthermore, the fuel cell engine can be controlled to enter a normal operating state.

[0081] Based on the above, after the fuel cell engine is in normal operating condition, regardless of whether the environment is normal or low temperature, the operating state threshold is used for fault protection. The multi-level operating reverse polarity thresholds of the fuel cell stack corresponding to the normal operating condition of the fuel cell engine are the first-level operating reverse polarity threshold, the second-level operating reverse polarity threshold, and the third-level operating reverse polarity threshold. Among them, the first-level operating reverse polarity threshold is greater than the second-level operating reverse polarity threshold, and the second-level operating reverse polarity threshold is greater than the third-level operating reverse polarity threshold. Since the engine is in normal operating condition, in order not to affect the normal operation of the whole vehicle or the engine and reduce fault reports, when the voltage of the second cell is less than or equal to the second-level operating reverse polarity threshold, power reduction processing is performed. That is, warning, power limitation, and normal shutdown are performed through different operating reverse polarity thresholds.

[0082] The second cell voltage is obtained in real time by the fuel cell voltage monitoring module when the fuel cell engine is in normal operation. That is, the corresponding second cell voltage can be detected in real time when the fuel cell engine is in normal operation. The second cell voltage is the minimum value of the fuel cell cell voltage at this time.

[0083] Specifically, if the voltage of the second cell is greater than the first-stage reverse polarity threshold, the fuel cell engine is controlled to continue operating in normal mode; if the voltage of the second cell is less than or equal to the first-stage reverse polarity threshold and greater than the second-stage reverse polarity threshold, a reverse polarity fault is determined to exist in the fuel cell stack, and a reverse polarity warning command is generated; if the voltage of the second cell is less than or equal to the second-stage reverse polarity threshold and greater than the third-stage reverse polarity threshold, the fuel cell engine is controlled to limit power; if the voltage of the second cell is less than or equal to the third-stage reverse polarity threshold, a reverse polarity fault is determined to exist in the fuel cell stack, and the fuel cell engine is controlled to shut down.

[0084] Similarly, upon receiving a reverse polarity warning command, the voltage of the corresponding individual cell in the fuel cell stack is increased, wherein the increased individual cell voltage is higher than the second individual cell voltage. It is known that the methods for increasing the voltage of the corresponding individual cell in the fuel cell stack can include, but are not limited to, opening a drain valve, increasing hydrogen pressure, or increasing the hydrogen pump speed; this embodiment does not impose any limitations on these methods.

[0085] The technical solution of this invention acquires the engine status signal, inlet water temperature, and outlet water temperature of the fuel cell engine, and determines whether the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state based on the engine status signal, inlet water temperature, and outlet water temperature. When the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state, a fuel cell voltage monitoring module detects the first cell voltage corresponding to the fuel cell stack, and determines whether the fuel cell stack has a start-up reverse polarity fault based on the first cell voltage and multi-level start-up reverse polarity thresholds. When it is determined that the fuel cell stack does not have a start-up reverse polarity fault, the fuel cell engine is controlled to enter a normal operating state, and the second cell voltage corresponding to the fuel cell stack and multi-level operating reverse polarity thresholds are used to determine whether the fuel cell stack has an operating reverse polarity fault. This invention solves the problem that currently, there is no way to provide different control methods for reverse polarity faults under different states, thus failing to guarantee fuel cell performance and avoid safety hazards. It achieves multi-level classification and processing of reverse polarity faults in the fuel cell engine under normal-temperature start-up state, low-temperature start-up state, and normal operating state, so as to provide different processing methods for different reverse polarity faults. At the same time, it protects the fuel cell engine, avoids the risk of damage, and avoids the performance degradation caused by frequent start-up and shutdown of the fuel cell engine.

[0086] Based on the same inventive concept Figure 2 This is a flowchart of a fuel cell engine control method provided by an embodiment of the present invention. Based on the above embodiments, this embodiment distinguishes and confirms reverse polarity faults in the fuel cell engine under normal temperature start-up, low temperature start-up, and normal operation conditions, providing an optional implementation method. For example... Figure 2 As shown, the fuel cell engine control method includes:

[0087] S210: Obtain the engine status signal, inlet water temperature, and outlet water temperature of the fuel cell engine.

[0088] S211. Determine whether the fuel cell engine is in standby or start-up state based on the engine status signal.

[0089] S220. When the fuel cell engine is in standby or start-up state, determine whether the inlet water temperature is greater than the first temperature threshold and whether the outlet water temperature is greater than the second temperature threshold. If yes, proceed to step S230; otherwise, proceed to step S240.

[0090] S230, confirm that the fuel cell engine is in a low-temperature start-up state.

[0091] Specifically, when the fuel cell engine is running, and the inlet water temperature is not greater than the first temperature threshold, or the outlet water temperature is not greater than the second temperature threshold, or the inlet water temperature is not greater than the first temperature threshold and the outlet water temperature is not greater than the second temperature threshold, then the fuel cell engine is considered to be in a low-temperature running state.

[0092] S231. The voltage of the first cell corresponding to the fuel cell stack is detected by the fuel cell voltage inspection module.

[0093] S232. Determine whether the voltage of the first cell is greater than the low temperature first stage power-on reverse polarity threshold. If yes, proceed to step S250; otherwise, proceed to step S233.

[0094] Specifically, if the voltage of the first cell is greater than the low-temperature first-stage start-up reverse polarity threshold, the fuel cell engine is controlled to enter normal operation. If the voltage of the first cell is not greater than the low-temperature first-stage start-up reverse polarity threshold, step S233 is executed to further determine whether the voltage of the first cell is greater than the low-temperature second-stage start-up reverse polarity threshold.

[0095] S233. Determine whether the voltage of the first cell is greater than the low-temperature second stage power-on reverse polarity threshold. If yes, proceed to step S234; otherwise, proceed to step S235.

[0096] S234. Determine that there is a reverse polarity fault during startup of the fuel cell stack and generate a reverse polarity warning command during startup.

[0097] Specifically, if the voltage of the first cell is not greater than the low-temperature first-stage reverse polarity threshold and the voltage of the first cell is greater than the low-temperature second-stage reverse polarity threshold, then the fuel cell stack is determined to have a reverse polarity fault and a reverse polarity warning command is generated.

[0098] Furthermore, upon receiving the reverse polarity warning command, the voltage of the corresponding individual cell in the fuel cell stack is increased, and then the fuel cell engine is controlled to enter normal operation, i.e., step S250 and subsequent steps are executed.

[0099] S235. Determine whether the voltage of the first cell is greater than the low-temperature third stage power-on reverse polarity threshold. If yes, proceed to step S260; otherwise, proceed to step S236.

[0100] Specifically, when the voltage of the first cell is greater than the low-temperature third-stage start-up reverse electrode threshold, the fuel cell engine is shut down, i.e., step S260 is executed.

[0101] S236. Determine that the fuel cell stack has a reverse polarity fault during startup and control the fuel cell engine to stop urgently.

[0102] Specifically, if the voltage of the first cell is not greater than the low-temperature third-stage start-up reverse polarity threshold, it is determined that there is a start-up reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to stop urgently, and then the fuel cell engine is controlled to shut down, i.e., step S260 is executed.

[0103] S240. Confirm that the fuel cell engine is in a normal temperature start-up state.

[0104] Specifically, when the fuel cell engine is running, and the inlet water temperature is greater than the first temperature threshold and the outlet water temperature is greater than the second temperature threshold, the fuel cell engine is considered to be running at normal temperature.

[0105] S241. The voltage of the first cell corresponding to the fuel cell stack is detected by the fuel cell voltage inspection module.

[0106] S242. Determine whether the voltage of the first cell is greater than the first-stage reverse polarity threshold at room temperature. If yes, proceed to step S250; otherwise, proceed to step S243.

[0107] Specifically, if the voltage of the first cell is greater than the first-stage reverse polarity threshold at room temperature, the fuel cell engine is controlled to enter normal operation. If the voltage of the first cell is not greater than the first-stage reverse polarity threshold at room temperature, step S243 is executed to further determine whether the voltage of the first cell is greater than the second-stage reverse polarity threshold at room temperature.

[0108] S243. Determine whether the voltage of the first cell is greater than the reverse polarity threshold of the second stage at room temperature. If yes, proceed to step S244; otherwise, proceed to step S245.

[0109] S244. Determine that there is a reverse polarity fault during startup of the fuel cell stack and generate a reverse polarity warning command.

[0110] Specifically, if the voltage of the first cell is not greater than the first-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the second-stage reverse polarity threshold at room temperature, then the fuel cell stack is determined to have a reverse polarity fault, and a reverse polarity warning command is generated.

[0111] Furthermore, upon receiving the reverse polarity warning command, the voltage of the corresponding individual cell in the fuel cell stack is increased, and then the fuel cell engine is controlled to enter normal operation, i.e., step S250 and subsequent steps are executed.

[0112] S245. Determine whether the voltage of the first cell is greater than the reverse polarity threshold of the third stage at room temperature. If yes, proceed to step S260; otherwise, proceed to step S246.

[0113] Specifically, when the voltage of the first cell is greater than the third-stage reverse polarity threshold at room temperature, the fuel cell engine is shut down, i.e., step S260 is executed.

[0114] S246. Determine that the fuel cell stack has a reverse polarity fault during startup and control the fuel cell engine to stop urgently.

[0115] Specifically, if the voltage of the first cell is not greater than the third-stage reverse polarity threshold at room temperature, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to stop urgently, and then the fuel cell engine is controlled to shut down, i.e., step S260 is executed.

[0116] S250: Control the fuel cell engine to enter normal operation and detect the voltage of the second cell corresponding to the fuel cell stack.

[0117] S251. Determine whether the voltage of the second cell is greater than the first-stage reverse polarity threshold. If yes, proceed to step S250; otherwise, proceed to step S252.

[0118] Specifically, if the voltage of the second cell is greater than the first-stage reverse polarity threshold, the fuel cell engine is controlled to continue to operate normally, i.e., step S250 and subsequent steps are executed; if the voltage of the second cell is not greater than the first-stage reverse polarity threshold, step S252 is executed to further determine whether the voltage of the second cell is greater than the second-stage reverse polarity threshold.

[0119] S252. Determine whether the voltage of the second cell is greater than the second-stage reverse polarity threshold. If yes, proceed to step S253; otherwise, proceed to step S254.

[0120] Specifically, if the voltage of the second cell is not greater than the second-stage reverse polarity threshold, then step S254 is executed to further determine whether the voltage of the second cell is greater than the third-stage reverse polarity threshold.

[0121] S253. Determine that the fuel cell stack has an operating reverse polarity fault and generate an operating reverse polarity warning command.

[0122] Specifically, when the voltage of the second cell is greater than the second-stage reverse polarity threshold, it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated. Further, after receiving the start-up reverse polarity warning command, the voltage of the corresponding cell in the fuel cell stack is increased, and then the fuel cell engine is controlled to enter the normal operation state, that is, step S250 and subsequent steps are executed.

[0123] S254. Determine whether the voltage of the second cell is greater than the third-stage reverse polarity threshold. If yes, proceed to step S255; otherwise, proceed to step S260.

[0124] S255, Control the power limit of the fuel cell engine.

[0125] Among them, controlling the power limit of the fuel cell engine is an increase in power limiting measures. By limiting the power, the number of times the fuel cell engine is shut down is reduced, ensuring that the fuel cell engine does not stop suddenly while running. This avoids performance degradation caused by frequent engine start-ups and shutdowns, reduces maintenance costs, ensures battery performance, extends lifespan, and guarantees safe operation.

[0126] Specifically, if the voltage of the second cell is greater than the reverse polarity threshold of the third stage operation, the power of the fuel cell engine is limited, and then the fuel cell engine is controlled to enter the normal operation state, that is, step S250 and subsequent steps are executed.

[0127] S260, Controls the shutdown of the fuel cell engine.

[0128] Specifically, if the voltage of the second cell is not greater than the reverse polarity threshold of the third stage operation, the fuel cell engine will be shut down.

[0129] Based on the same inventive concept Figure 3 This is a schematic diagram of a fuel cell engine control device provided in an embodiment of the present invention. Figure 3 As shown, the fuel cell engine control unit includes:

[0130] The start-up status determination module 310 is used to acquire the engine status signal, inlet water temperature and outlet water temperature of the fuel cell engine, and determine whether the fuel cell engine is in a low temperature start-up state or a normal temperature start-up state based on the engine status signal, inlet water temperature and outlet water temperature.

[0131] The start-up reverse polarity fault determination module 320 is used to perform the following actions when the fuel cell engine is in a low temperature start-up state or a normal temperature start-up state: using the fuel cell voltage inspection module to detect the first cell voltage corresponding to the fuel cell stack, and determining whether there is a start-up reverse polarity fault in the fuel cell stack based on the first cell voltage and the multi-level start-up reverse polarity threshold.

[0132] The reverse polarity fault determination module 330 is used to control the fuel cell engine to enter normal operation when it is determined that there is no reverse polarity fault during startup of the fuel cell stack, and to determine whether there is a reverse polarity fault in the fuel cell stack based on the detected second cell voltage and multi-level reverse polarity threshold.

[0133] Optionally, the fuel cell engine can be set to either a low-temperature start-up state or a normal-temperature start-up state based on engine status signals, inlet water temperature, and outlet water temperature. This can be specifically used for:

[0134] The status of the fuel cell engine is determined based on the engine status signal, indicating whether it is in standby or start-up mode.

[0135] When the fuel cell engine is in standby or start-up mode, if the inlet water temperature is greater than the first temperature threshold and the outlet water temperature is greater than the second temperature threshold, then the fuel cell engine is determined to be in normal temperature start-up mode.

[0136] If the inlet water temperature is less than or equal to the first temperature threshold and the outlet water temperature is less than or equal to the second temperature threshold, then the fuel cell engine is determined to be in a low-temperature start-up state.

[0137] If the inlet water temperature is less than or equal to the first temperature threshold, or the outlet water temperature is less than or equal to the second temperature threshold, then the fuel cell engine is determined to be in a low-temperature start-up state.

[0138] Optionally, the multi-level power-on reverse polarity threshold includes a first-level low-temperature power-on reverse polarity threshold, a second-level low-temperature power-on reverse polarity threshold, and a third-level low-temperature power-on reverse polarity threshold;

[0139] The presence of a startup reverse polarity fault in the fuel cell stack is determined based on the first cell voltage and the multi-stage startup reverse polarity threshold. Specifically, this is used for:

[0140] If the voltage of the first cell is greater than the low-temperature first-stage start-up reverse polarity threshold, then it is determined that there is no start-up reverse polarity fault in the fuel cell stack.

[0141] If the voltage of the first cell is less than or equal to the low-temperature first-stage reverse polarity threshold and the voltage of the first cell is greater than the low-temperature second-stage reverse polarity threshold, then it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated.

[0142] If the voltage of the first cell is less than or equal to the low-temperature second-stage start-up reverse polarity threshold, and the voltage of the first cell is greater than the low-temperature third-stage start-up reverse polarity threshold, then it is determined that there is a start-up reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to shut down.

[0143] If the voltage of the first cell is less than or equal to the low-temperature third stage start-up reverse polarity threshold, it is determined that there is a start-up reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to stop abruptly.

[0144] Optionally, the multi-level power-on reverse polarity threshold includes a first-level power-on reverse polarity threshold at room temperature, a second-level power-on reverse polarity threshold at room temperature, and a third-level power-on reverse polarity threshold at room temperature.

[0145] The presence of a startup reverse polarity fault in the fuel cell stack is determined based on the first cell voltage and the multi-stage startup reverse polarity threshold. Specifically, this is used for:

[0146] If the voltage of the first cell is greater than the first-stage reverse polarity threshold at room temperature, then it is determined that there is no reverse polarity fault during startup in the fuel cell stack.

[0147] If the voltage of the first cell is less than or equal to the first-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the second-stage reverse polarity threshold at room temperature, then it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated.

[0148] If the voltage of the first cell is less than or equal to the second-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the third-stage reverse polarity threshold at room temperature, then it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is shut down.

[0149] If the voltage of the first cell is less than or equal to the third stage reverse polarity threshold at room temperature, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is controlled to stop abruptly.

[0150] Optionally, the fuel cell engine control unit also includes:

[0151] The single-cell voltage enhancement module is used to increase the voltage of the corresponding single cell in the fuel cell stack after receiving a power-on reverse polarity warning command, wherein the enhanced single-cell voltage is higher than the first single-cell voltage.

[0152] Optionally, the multi-level operating reversal threshold includes a first-level operating reversal threshold, a second-level operating reversal threshold, and a third-level operating reversal threshold;

[0153] Based on the detected second cell voltage and multi-stage reverse polarity threshold of the fuel cell stack, it is determined whether a reverse polarity fault exists in the fuel cell stack. Specifically, this is used for:

[0154] If the voltage of the second cell is greater than the first-stage reverse polarity threshold, the fuel cell engine will continue to operate in normal mode.

[0155] If the voltage of the second cell is less than or equal to the first-stage reverse polarity threshold and the voltage of the second cell is greater than the second-stage reverse polarity threshold, then it is determined that there is a reverse polarity fault in the fuel cell stack, and a reverse polarity warning command is generated.

[0156] If the voltage of the second cell is less than or equal to the second-stage reverse polarity threshold and the voltage of the second cell is greater than the third-stage reverse polarity threshold, then the power of the fuel cell engine is limited.

[0157] If the voltage of the second cell is less than or equal to the third-stage reverse polarity threshold, it is determined that there is a reverse polarity fault in the fuel cell stack, and the fuel cell engine is shut down.

[0158] Optionally, the multi-level power-on reversal threshold includes a low-temperature first-level power-on reversal threshold, a low-temperature second-level power-on reversal threshold, a low-temperature third-level power-on reversal threshold, a normal-temperature first-level power-on reversal threshold, a normal-temperature second-level power-on reversal threshold, and a normal-temperature third-level power-on reversal threshold.

[0159] The low-temperature first-stage power-on reverse polarity threshold is lower than the normal-temperature first-stage power-on reverse polarity threshold.

[0160] The low-temperature second-stage start-up reverse polarity threshold is less than the normal-temperature second-stage start-up reverse polarity threshold;

[0161] The low-temperature third-stage startup reverse polarity threshold is less than the normal-temperature third-stage startup reverse polarity threshold.

[0162] The fuel cell engine control device provided in the embodiments of the present invention can execute the fuel cell engine control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the fuel cell engine control method.

[0163] Based on the same inventive concept, embodiments of the present invention provide a fuel cell vehicle, which includes a fuel cell engine. Figure 4 A schematic diagram of the structure of a fuel cell vehicle 410 that can be used to implement embodiments of the present invention is shown, such as... Figure 4 As shown, the fuel cell vehicle 410 also includes at least one processor 411 and a memory, such as a read-only memory (ROM 412) or a random access memory (RAM 413), communicatively connected to the at least one processor 411. The memory stores computer programs executable by the at least one processor. The processor 411 can perform various appropriate actions and processes based on the computer program stored in the ROM 412 or loaded from storage unit 418 into the RAM 413. The RAM 413 can also store various programs and data required for the operation of the fuel cell vehicle 410. The processor 411, ROM 412, and RAM 413 are interconnected via a bus 414. An I / O (input / output) interface 415 is also connected to the bus 414.

[0164] Multiple components in the fuel cell vehicle 410 are connected to the I / O interface 415, including: an input unit 416, such as a keyboard, mouse, etc.; an output unit 417, such as various types of displays, speakers, etc.; a storage unit 418, such as a disk, optical disk, etc.; and a communication unit 419, such as a network card, modem, wireless transceiver, etc. The communication unit 419 allows the fuel cell vehicle 410 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0165] Processor 411 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 411 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 411 performs the various methods and processes described above, such as fuel cell engine control methods.

[0166] In some embodiments, the fuel cell engine control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 418. In some embodiments, part or all of the computer program may be loaded into and / or installed on the fuel cell vehicle 410 via ROM 412 and / or communication unit 419. When the computer program is loaded into RAM 413 and executed by processor 411, one or more steps of the fuel cell engine control method described above may be performed. Alternatively, in other embodiments, processor 411 may be configured to perform the fuel cell engine control method by any other suitable means (e.g., by means of firmware).

[0167] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0168] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0169] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0170] To provide interaction with the user, the systems and technologies described herein can be implemented in a fuel cell vehicle 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 pointing device (e.g., a mouse or trackball) through which the user provides input to the fuel cell vehicle. Other types of devices can also be used to provide interaction with the user; for example, 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 sound input, voice input, or tactile input).

[0171] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0172] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created 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 cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0173] 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 described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0174] The specific embodiments described above do not constitute a limitation on the scope of protection of this 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 this invention should be included within the scope of protection of this invention.

Claims

1. A fuel cell engine control method, characterized in that, include: The engine status signal, inlet water temperature, and outlet water temperature of the fuel cell engine are acquired, and the fuel cell engine is determined to be in a low-temperature start-up state or a normal-temperature start-up state based on the engine status signal, the inlet water temperature, and the outlet water temperature. When the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state, the fuel cell voltage inspection module is used to detect the first cell voltage corresponding to the fuel cell stack, and the fuel cell stack is determined to have a start-up reverse polarity fault based on the first cell voltage and the multi-level start-up reverse polarity threshold. When it is determined that the fuel cell stack does not have a reverse polarity fault during startup, the fuel cell engine is controlled to enter a normal operating state, and the presence of a reverse polarity fault in the fuel cell stack is determined based on the detected second cell voltage and multi-level reverse polarity threshold.

2. The fuel cell engine control method according to claim 1, characterized in that, Determining whether the fuel cell engine is in a low-temperature start-up state or a normal-temperature start-up state based on the engine status signal, the inlet water temperature, and the outlet water temperature includes: The fuel cell engine is determined to be in standby or start-up state based on the engine status signal. When the fuel cell engine is in standby or start-up state, if the inlet water temperature is greater than a first temperature threshold and the outlet water temperature is greater than a second temperature threshold, then the fuel cell engine is determined to be in a normal temperature start-up state. If the inlet water temperature is less than or equal to the first temperature threshold and the outlet water temperature is less than or equal to the second temperature threshold, then the fuel cell engine is determined to be in a low-temperature start-up state. If the inlet water temperature is less than or equal to the first temperature threshold, or the outlet water temperature is less than or equal to the second temperature threshold, then the fuel cell engine is determined to be in a low-temperature start-up state.

3. The fuel cell engine control method according to claim 1, characterized in that, The multi-level power-on reversal threshold includes a first-level low-temperature power-on reversal threshold, a second-level low-temperature power-on reversal threshold, and a third-level low-temperature power-on reversal threshold; Determining whether the fuel cell stack has a start-up reverse polarity fault based on the first individual cell voltage and the multi-level start-up reverse polarity threshold includes: If the voltage of the first cell is greater than the low-temperature first-stage start-up reverse polarity threshold, then it is determined that the fuel cell stack does not have a start-up reverse polarity fault. If the voltage of the first cell is less than or equal to the low-temperature first-stage reverse polarity threshold and the voltage of the first cell is greater than the low-temperature second-stage reverse polarity threshold, then it is determined that the fuel cell stack has a reverse polarity fault and a reverse polarity warning command is generated. If the voltage of the first cell is less than or equal to the low-temperature second-stage start-up reverse polarity threshold, and the voltage of the first cell is greater than the low-temperature third-stage start-up reverse polarity threshold, then it is determined that the fuel cell stack has a start-up reverse polarity fault, and the fuel cell engine is controlled to shut down. If the voltage of the first cell is less than or equal to the low-temperature third-stage reverse polarity threshold, then it is determined that the fuel cell stack has a reverse polarity fault, and the fuel cell engine is controlled to stop abruptly.

4. The fuel cell engine control method according to claim 1, characterized in that, The multi-level power-on reverse polarity threshold includes a first-level power-on reverse polarity threshold at room temperature, a second-level power-on reverse polarity threshold at room temperature, and a third-level power-on reverse polarity threshold at room temperature; Determining whether the fuel cell stack has a start-up reverse polarity fault based on the first individual cell voltage and the multi-level start-up reverse polarity threshold includes: If the voltage of the first cell is greater than the first-stage reverse polarity threshold at room temperature, then it is determined that the fuel cell stack does not have a reverse polarity fault. If the voltage of the first cell is less than or equal to the first-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the second-stage reverse polarity threshold at room temperature, then it is determined that the fuel cell stack has a reverse polarity fault and a reverse polarity warning command is generated. If the voltage of the first cell is less than or equal to the second-stage reverse polarity threshold at room temperature, and the voltage of the first cell is greater than the third-stage reverse polarity threshold at room temperature, then it is determined that the fuel cell stack has a reverse polarity fault at startup, and the fuel cell engine is controlled to shut down. If the voltage of the first cell is less than or equal to the normal temperature third-stage start-up reverse polarity threshold, then it is determined that the fuel cell stack has a start-up reverse polarity fault, and the fuel cell engine is controlled to stop abruptly.

5. The fuel cell engine control method according to any one of claims 3 or 4, characterized in that, The fuel cell engine control method further includes: Upon receiving the reverse polarity warning command, the voltage of the corresponding individual cell in the fuel cell stack is increased, wherein the increased individual cell voltage is higher than the first individual cell voltage.

6. The fuel cell engine control method according to claim 1, characterized in that, The multi-level operating reversal threshold includes a first-level operating reversal threshold, a second-level operating reversal threshold, and a third-level operating reversal threshold; Based on the detected second cell voltage and multi-stage reverse polarity threshold of the fuel cell stack, determine whether the fuel cell stack has a reverse polarity fault, including: If the voltage of the second cell is greater than the first stage reverse polarity threshold, the fuel cell engine is controlled to continue operating in the normal operating state. If the voltage of the second cell is less than or equal to the first stage reverse polarity threshold, and the voltage of the second cell is greater than the second stage reverse polarity threshold, then it is determined that the fuel cell stack has a reverse polarity fault, and a reverse polarity warning command is generated. If the voltage of the second cell is less than or equal to the second stage reverse polarity threshold, and the voltage of the second cell is greater than the third stage reverse polarity threshold, then the power of the fuel cell engine is limited. If the voltage of the second cell is less than or equal to the third-stage reverse polarity threshold, then the fuel cell stack is determined to have a reverse polarity fault, and the fuel cell engine is shut down.

7. The fuel cell engine control method according to claim 1, characterized in that, The multi-level power-on reversal threshold includes a low-temperature first-level power-on reversal threshold, a low-temperature second-level power-on reversal threshold, a low-temperature third-level power-on reversal threshold, a normal-temperature first-level power-on reversal threshold, a normal-temperature second-level power-on reversal threshold, and a normal-temperature third-level power-on reversal threshold; The low-temperature first-stage power-on reverse polarity threshold is less than the normal-temperature first-stage power-on reverse polarity threshold; The low-temperature second-stage power-on reverse polarity threshold is less than the normal-temperature second-stage power-on reverse polarity threshold; The low-temperature third-stage power-on reverse polarity threshold is less than the normal-temperature third-stage power-on reverse polarity threshold.

8. A fuel cell engine control device, characterized in that, include: The start-up status determination module is used to acquire the engine status signal, inlet water temperature and outlet water temperature of the fuel cell engine, and determine whether the fuel cell engine is in a low temperature start-up state or a normal temperature start-up state based on the engine status signal, the inlet water temperature and the outlet water temperature. The start-up reverse polarity fault determination module is used to perform the following actions when the fuel cell engine is in a low temperature start-up state or a normal temperature start-up state: using the fuel cell voltage inspection module to detect the first cell voltage corresponding to the fuel cell stack, and determining whether the fuel cell stack has a start-up reverse polarity fault based on the first cell voltage and the multi-level start-up reverse polarity threshold. The reverse polarity fault determination module is used to control the fuel cell engine to enter normal operation when it is determined that there is no reverse polarity fault during startup of the fuel cell stack, and to determine whether there is a reverse polarity fault in the fuel cell stack based on the detected second cell voltage and multi-level reverse polarity threshold.

9. A fuel cell vehicle, characterized in that, The fuel cell vehicle includes a fuel cell engine; The fuel cell vehicle also includes: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the fuel cell engine control method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the fuel cell engine control method according to any one of claims 1-7.

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