Control method and system for over-standard hydrogen concentration in galvanic pile shell and vehicle

Abstract

According to the control method for the standard exceeding of the hydrogen concentration in the fuel cell stack shell and the matched control system, whether the hydrogen concentration exceeds the standard or not is actively diagnosed by detecting the hydrogen concentration in the fuel cell stack shell, and when the hydrogen concentration exceeds the standard, corresponding emergency treatment measures are taken to maintain system operation or normal starting, so that the safety of the fuel cell stack shell is ensured. The problem that the fuel cell is directly shut down or cannot be started when the hydrogen exceeds the standard and is inconvenient for a user to use is solved, and meanwhile, the running safety of a fuel cell system is improved.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell control technology, and further to a control method, system and vehicle for excessive hydrogen concentration in a fuel cell stack casing. Background Art

[0002] When the fuel cell system is shut down or in operation, there is more or less hydrogen at a certain pressure in the anode of the stack. At this time, there will be more or less hydrogen leakage in the stack. The leaked hydrogen enters the stack shell, which may cause local hydrogen accumulation, which is very likely to cause an explosion, especially when the system is in a standby state without being started. At this time, since the air compressor is not running and there is no shell purge gas flowing in the stack shell, there is a high possibility that the concentration in the shell exceeds the standard due to local accumulation of hydrogen. In addition, when the system is approaching the end of the stack life, due to the increase in the amount of leakage from the stack, during the operation of the system, even if there is shell purge gas flowing in the stack shell, there is a possibility that the shell hydrogen concentration exceeds the standard due to local accumulation of leaked hydrogen.

[0003] The existing solution is to set an alarm threshold for the hydrogen concentration in the fuel cell shell. When the system is in operation or on standby, the hydrogen concentration in the fuel cell shell is detected. When the feedback value is equal to or greater than the threshold, the controller directly controls the system to shut down or prevents the system from starting. It does not judge the excessive hydrogen concentration and make corresponding emergency measures. In this case, users are often unable to continue using the system, resulting in a poor user experience. Summary of the invention

[0004] In view of the problems in the prior art that the system is directly shut down or cannot be started after the hydrogen concentration in the fuel cell stack shell exceeds the standard during operation or waiting to be started, and it is impossible to judge the excessive hydrogen concentration and conduct emergency management, the purpose of the present invention is to provide a control method for the excessive hydrogen concentration in the stack shell and a matching control system. Before the fuel cell system waits to be started or during operation, the hydrogen concentration in the fuel cell stack shell is detected to actively diagnose whether the hydrogen concentration exceeds the standard. When the hydrogen concentration exceeds the standard, corresponding emergency treatment measures are taken to maintain system operation or normal startup, thereby avoiding the problem that the fuel cell is directly shut down or cannot be started when the hydrogen concentration exceeds the standard, causing inconvenience in use, improving the safety of the fuel cell system operation, and facilitating user use.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A control method for excessive hydrogen concentration in a fuel cell stack shell, applied to a fuel cell system, comprises the following steps: the control method comprises: when the fuel cell system is in a state of waiting to be started, detecting the hydrogen concentration in the stack shell, wherein when the hydrogen concentration in the stack shell is less than a first hydrogen concentration threshold, the fuel cell system starts and runs normally; when the hydrogen concentration in the stack shell is greater than a second hydrogen concentration threshold, the fuel cell system stops starting and issues a fault alarm; when the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold, the fuel cell system stops starting and issues a fault alarm. The fuel cell system starts and runs normally and detects the hydrogen concentration in the stack shell again after the fuel cell system runs for a preset time; when it is determined that the hydrogen concentration in the stack shell is less than the first hydrogen concentration threshold through the re-detection of the hydrogen concentration in the stack shell, the fuel cell system continues to run; when it is determined that the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold through the re-detection of the hydrogen concentration in the stack shell, the fuel cell system shuts down and issues a fault alarm; the first hydrogen concentration threshold is much lower than the hydrogen low explosion value, and the second hydrogen concentration threshold is slightly lower than the hydrogen low explosion value.

[0007] In some embodiments, the control method further includes: when the fuel cell system is in an operating state, real-time or periodic detection of the hydrogen concentration in the stack shell, wherein when the hydrogen concentration in the stack shell is less than a first hydrogen concentration threshold, the fuel cell system continues to operate; when the hydrogen concentration in the stack shell is greater than a second hydrogen concentration threshold, the fuel cell system shuts down and issues a fault alarm; when the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold, the fuel cell system continues to operate and detects the hydrogen in the stack shell again after the fuel cell system starts to operate for the preset time from the operation process trigger time point. concentration, the operation process triggering time point is the time point when the fuel cell system is in the operation process and it is detected that the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not more than the second hydrogen concentration threshold; when the hydrogen concentration in the stack shell is detected again after the fuel cell system starts to run for the preset time from the operation process triggering time point, and it is determined that the hydrogen concentration in the stack shell is less than the first hydrogen concentration threshold, the fuel cell system continues to operate; when the hydrogen concentration in the stack shell is determined to be not less than the first hydrogen concentration threshold by detecting the hydrogen concentration in the stack shell again, the fuel cell system shuts down and issues a fault alarm.

[0008] In some embodiments, a purging operation is performed on the stack shell when the fuel cell system is normally started and operated and during a preset operation time of the fuel cell system, and / or when the fuel cell system continues to operate and during a preset operation time starting from a trigger time point of the operation process.

[0009] In some embodiments, the preset purge time is 15 minutes.

[0010] In some embodiments, the first hydrogen concentration threshold is 10000 ppm.

[0011] In some embodiments, the second hydrogen concentration threshold is 35000 ppm.

[0012] The present invention also provides a control system for excessive hydrogen concentration in a fuel cell stack shell, using the above-mentioned control method for excessive hydrogen concentration in a fuel cell stack shell, comprising: a fuel cell stack shell and a fuel cell stack arranged in the fuel cell stack shell; the fuel cell stack shell is provided with a purge gas inlet and a purge gas outlet, the purge gas inlet is used for allowing purge gas to enter, and the purge gas outlet is used for allowing purge gas to flow out; a hydrogen concentration sensor, the hydrogen concentration sensor is arranged in the fuel cell stack shell, and is used to detect the hydrogen concentration in the fuel cell stack shell; a controller, the controller is electrically connected to the hydrogen concentration sensor and the fuel cell stack, respectively, the controller is used to judge the relationship between the hydrogen concentration and a first hydrogen concentration threshold value or a second hydrogen concentration threshold value according to the hydrogen concentration detected by the hydrogen concentration sensor, and control the fuel cell system to stop starting and alarm for a fault, start and run normally, continue to run, or shut down and alarm for a fault according to the judgment result.

[0013] In some embodiments, the controller is further configured to control a purging operation on the stack casing.

[0014] The present invention also provides a data processing system, comprising a memory and a processor communicatively connected to the memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program to implement the above-mentioned method for controlling excessive hydrogen concentration in the fuel cell stack shell.

[0015] The present invention also provides a vehicle using the above-mentioned method for controlling excessive hydrogen concentration in a fuel cell stack casing.

[0016] Compared with the prior art, the control method and system for excessive hydrogen concentration in the fuel cell stack housing provided by the present invention have the following beneficial effects:

[0017] 1. The control method for excessive hydrogen concentration in the stack shell provided by the present invention can detect the hydrogen concentration in the stack shell before the fuel cell system is started and diagnose whether the hydrogen concentration exceeds the standard, make corresponding treatment measures according to the diagnosis results, and perform emergency operations in time when the hydrogen concentration exceeds the standard, actively start the purge gas for purge, reduce the hydrogen concentration, ensure that the fuel cell system can be started safely, and improve the safety and stability of the subsequent operation process;

[0018] 2. The control method for excessive hydrogen concentration in the stack shell provided by the present invention can detect the hydrogen concentration in the stack shell during the operation of the fuel cell system and diagnose whether the hydrogen concentration exceeds the standard, and make corresponding treatment measures according to the diagnosis results. When the hydrogen concentration exceeds the standard, emergency operations can be performed in time, and the purge gas can be actively turned on for purge to reduce the hydrogen concentration, so as to ensure that the fuel cell system operates in the optimal state;

[0019] 3. The prior art only relies on a single hydrogen concentration value as the basis for judging whether it exceeds the standard. Once the hydrogen concentration exceeds the standard, the system is immediately shut down. The diagnostic method and control processing are relatively simple. Compared with the single point value as the judgment, the present invention provides two hydrogen concentration thresholds exceeding the standard. The first hydrogen concentration threshold is slightly lower than the minimum concentration value of hydrogen explosion. Its purpose is to ensure that the fuel cell system will not have an explosion accident. The second hydrogen concentration threshold is much lower than the minimum concentration value of hydrogen explosion. Its purpose is to immediately perform a purge process when hydrogen begins to accumulate in the battery stack shell, reduce the hydrogen concentration, maintain the long-term operation of the system, and avoid direct shutdown or inability to start, which causes a poor experience for customers. In the actual application process of the present invention, the hydrogen concentration in the battery stack shell can be monitored in real time. Once it is found that the hydrogen concentration exceeds the first hydrogen concentration threshold, it is immediately purged to avoid the problem of direct shutdown of the system due to excessive hydrogen concentration, thereby improving the user experience.

[0020] 4. The control system provided by the present invention actively detects the hydrogen concentration in the stack shell and performs an excessive diagnosis during the operation of the fuel cell system or before waiting to start. When the hydrogen concentration exceeds the standard, the purge step is started to reduce the hydrogen concentration, so as to achieve safe startup and stable operation of the fuel cell system, reduce the safety risk of hydrogen use, and has extremely high promotion and use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0022] Figure 1 A flow chart of a method for controlling excessive hydrogen concentration in a stack casing when the fuel cell system is in a waiting-to-start state;

[0023] Figure 2 A flow chart of a method for controlling excessive hydrogen concentration in a stack casing when the fuel cell system is in an operating state;

[0024] Figure 3 This is a schematic structural diagram of a control system for excessive hydrogen concentration in a fuel cell stack shell provided by the present invention.

[0025] Description of Figure Numbers:

[0026] 1—Fuel stack shell; 2—Fuel stack; 3—Hydrogen concentration sensor; 4—Air inlet pipe; 5—Air outlet pipe; 6—Hydrogen inlet pipe; 7—Hydrogen outlet pipe. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0028] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0029] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0030] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] Example 1

[0033] The present invention provides a method for controlling excessive hydrogen concentration in a fuel cell stack shell, which is specifically applied when a fuel cell system is in a state of waiting to start or in a state of operation.

[0034] The present invention provides two hydrogen concentration thresholds, wherein the first hydrogen concentration threshold is much lower than the hydrogen low explosion value, and the second hydrogen concentration threshold is slightly lower than the hydrogen low explosion value. It should be noted that the above-mentioned slightly lower means about 5% lower, and much lower means 50% or more lower.

[0035] It is known that the low explosion value of hydrogen is 4.0%, that is, the volume concentration of hydrogen in the air is 4.0%, or 40,000 ppm.

[0036] Preferably, the first hydrogen concentration threshold is 10000 ppm, which is selected based on 25% of the low explosion value of hydrogen. 25% of the low explosion value of hydrogen (40000 ppm) is 1%, ie, 10000 ppm.

[0037] Preferably, the second hydrogen concentration threshold is 35000ppm, which is selected based on the evaluation results under the premise of ensuring the safe operation of the fuel cell. It does not exceed the low explosion value of hydrogen (40000ppm) and can be determined based on actual usage. 35000ppm has a margin of 5000ppm from 40000ppm, which takes into account both safety and the actual operation needs to the greatest extent.

[0038] (1) When the fuel cell system is in the waiting state, such as Figure 1 As shown:

[0039] Detect the hydrogen concentration in the stack shell, where:

[0040] When the hydrogen concentration in the stack shell is less than the first hydrogen concentration threshold, the fuel cell system starts and operates normally.

[0041] When the hydrogen concentration in the stack shell is greater than a second hydrogen concentration threshold, the fuel cell system stops starting and issues a fault alarm.

[0042] When the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold, the fuel cell system starts and operates normally and the hydrogen concentration in the stack shell is detected again after the fuel cell system operates for a preset time.

[0043] The above-mentioned preset running time is preferably 15 minutes, and the specific time can be determined according to the actual running situation.

[0044] Furthermore, when the fuel cell system is started and operated normally and during the preset operation time of the fuel cell system, a purging operation is performed on the stack casing to reduce the hydrogen concentration inside the stack casing.

[0045] Furthermore, the steps after the above-mentioned re-detection of the hydrogen concentration in the stack casing include:

[0046] When the hydrogen concentration in the stack shell is determined to be less than the first hydrogen concentration threshold by detecting the hydrogen concentration in the stack shell again, the fuel cell system continues to operate.

[0047] When the hydrogen concentration in the stack shell is determined to be not less than the first hydrogen concentration threshold by detecting the hydrogen concentration in the stack shell again, the fuel cell system is shut down and a fault alarm is issued.

[0048] (2) When the fuel cell system is in operation, such as Figure 2 As shown:

[0049] Real-time or regular detection of hydrogen concentration in the stack shell, including:

[0050] When the hydrogen concentration in the stack casing is less than the first hydrogen concentration threshold, the fuel cell system continues to operate.

[0051] When the hydrogen concentration in the stack shell is greater than a second hydrogen concentration threshold, the fuel cell system is shut down and a fault alarm is issued.

[0052] When the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold, the fuel cell system continues to operate and the hydrogen concentration in the stack shell is detected again after the fuel cell system has been running for a preset time from the trigger time point of the operation process.

[0053] The above-mentioned operation process triggering time point is the time point when the fuel cell system is in the operation process and it is detected that the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold.

[0054] The above-mentioned preset running time is preferably 15 minutes, and the specific time can be determined according to the actual running situation.

[0055] Furthermore, during the preset time period when the fuel cell system starts to run from the triggering time point of the operation process, a purging operation is performed on the stack shell, and the hydrogen concentration in the stack shell is detected again after the purging operation.

[0056] Furthermore, the above-mentioned fuel cell system continues to operate and the step after the fuel cell system operates for a preset time from the triggering time point of the operation process and detects the hydrogen concentration in the stack casing again includes:

[0057] When it is determined that the hydrogen concentration in the stack shell is less than the first hydrogen concentration threshold, the fuel cell system continues to operate.

[0058] When it is determined that the hydrogen concentration in the stack shell is not less than a first hydrogen concentration threshold, the fuel cell system is shut down and a fault alarm is issued.

[0059] The purging time in the above-mentioned purging operation is 15 minutes, and the purging time can also be adjusted according to the needs in the actual application process. The ultimate goal is to reduce the hydrogen concentration in the stack shell and maintain the stable operation and safe startup of the fuel cell system.

[0060] The above-mentioned purge gas can be a dry inert gas, or it can be the continuous stack shell purge gas generated during the system startup process, that is, the air outside the stack shell is pressurized by the air compressor and cooled by the intercooler before entering the stack shell for purging.

[0061] In the prior art, only a single hydrogen concentration value is relied upon as the basis for judging whether it exceeds the standard. Once the hydrogen concentration exceeds the standard, the system is immediately shut down. The diagnostic method and control processing are relatively simple. Compared with the single point value as the judgment, the present invention provides two hydrogen concentration thresholds exceeding the standard. The second hydrogen concentration threshold is slightly lower than the minimum concentration value of hydrogen explosion. Its purpose is to ensure that the fuel cell system will not have an explosion accident. The first hydrogen concentration threshold is much lower than the minimum concentration value of hydrogen explosion. Its purpose is to immediately perform a purge process when hydrogen begins to accumulate in the stack shell, reduce the hydrogen concentration, maintain the long-term operation of the system, and avoid direct shutdown or inability to start, which causes a poor experience for customers. In actual application, the present invention can monitor the hydrogen concentration in the stack shell in real time. Once it is found that the hydrogen concentration exceeds the first hydrogen concentration threshold, it is immediately purged to avoid the problem of direct shutdown of the system due to excessive hydrogen concentration, thereby improving the user experience.

[0062] The control method provided by the present invention is suitable for real-time detection of the hydrogen concentration in the fuel cell stack shell before the fuel cell system is waiting to start and during operation, and actively diagnoses the phenomenon of exceeding the standard, and takes corresponding treatment measures to achieve safe startup and stable operation of the system.

[0063] Example 2

[0064] Based on Example 1, this example provides a control system for excessive hydrogen concentration in the stack shell. The control system uses the control method for excessive hydrogen concentration in the stack shell provided in Example 1 before the fuel cell system is waiting to start or during operation.

[0065] like Figure 3 As shown, it includes: a fuel cell stack shell 1 and a fuel cell stack 2 arranged in the fuel cell stack shell 1, the fuel cell stack shell 1 is provided with a purge gas inlet and a purge gas outlet, the purge gas inlet is used for allowing purge gas to enter, so as to reduce the hydrogen concentration in the fuel cell stack shell 1, and the excess hydrogen in the fuel cell stack shell 1 flows out through the purge gas outlet along with the purge gas.

[0066] The control system also includes an air intake pipeline 4, an air outlet pipeline 5, a hydrogen intake pipeline 6, a hydrogen outlet pipeline 7 and a hydrogen concentration sensor 3, which are respectively connected to the fuel cell stack 2. The hydrogen concentration sensor 3 is arranged on the fuel cell stack shell 1. Preferably, the hydrogen concentration sensor 3 is arranged inside the fuel cell stack shell 1 for real-time detection or timed detection of the hydrogen concentration inside the fuel cell stack shell 1. There is no limit to the number of hydrogen concentration sensors 3. Arranging multiple hydrogen concentration sensors 3 can greatly improve the accuracy of hydrogen concentration detection and excessive diagnosis.

[0067] The control system is also provided with a controller, which is electrically connected to the hydrogen concentration sensor 3 and the fuel cell stack 2 respectively. The controller receives the hydrogen concentration signal collected by the hydrogen concentration sensor 3, and determines the relationship between the hydrogen concentration and the first hydrogen concentration threshold and the second hydrogen concentration threshold. According to the determination result, the controller controls the fuel cell system to stop starting and issue a fault alarm, or start and run normally, or continue to run, or shut down and issue a fault alarm.

[0068] Preferably, the controller may also control a purging operation to be performed on the stack housing 1 to reduce the hydrogen concentration inside the stack housing 1 .

[0069] Example 3

[0070] Based on Example 1, the present invention also provides a data processing system, including a memory for storing computer programs and a processor communicatively connected to the memory, the processor being used to execute the computer program. The above-mentioned data processing system can implement the above-mentioned control method for excessive hydrogen concentration in the fuel cell stack shell.

[0071] Example 4

[0072] On the basis of the above-mentioned embodiments, the present invention also provides a vehicle, which is equipped with a fuel cell system. The fuel cell system uses the above-mentioned control method for excessive hydrogen concentration in the stack shell and a matching control system. Before the fuel cell system waits to be started and during operation, the hydrogen concentration in the stack shell is detected in real time, and the excessive hydrogen concentration is actively diagnosed. Under the premise of ensuring the safe operation of the fuel cell system, the hydrogen concentration in the shell is reduced by purging gas through the stack shell to maintain system operation or safe start-up. If the purging measures are ineffective, the fuel cell system is forced to shut down.

[0073] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for controlling excessive hydrogen concentration in a stack housing, applied to a fuel cell system, characterized in that: The control method comprises: When the fuel cell system is in a state of waiting to start, the hydrogen concentration in the stack shell is detected, wherein when the hydrogen concentration in the stack shell is less than a first hydrogen concentration threshold, the fuel cell system starts and runs normally; when the hydrogen concentration in the stack shell is greater than a second hydrogen concentration threshold, the fuel cell system stops starting and issues a fault alarm; when the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold, the fuel cell system starts and runs normally and the hydrogen concentration in the stack shell is detected again after the fuel cell system has been running for a preset time; When the hydrogen concentration in the stack shell is determined to be less than the first hydrogen concentration threshold by re-detecting the hydrogen concentration in the stack shell, the fuel cell system continues to operate; when the hydrogen concentration in the stack shell is determined to be not less than the first hydrogen concentration threshold by re-detecting the hydrogen concentration in the stack shell, the fuel cell system shuts down and issues a fault alarm; The first hydrogen concentration threshold is much lower than the low explosion value of hydrogen, and the second hydrogen concentration threshold is slightly lower than the low explosion value of hydrogen.

2. The control method according to claim 1, characterized in that: The control method further comprises: When the fuel cell system is in the state of operation, the hydrogen concentration in the stack shell is detected in real time or periodically, wherein when the hydrogen concentration in the stack shell is less than a first hydrogen concentration threshold, the fuel cell system continues to operate; when the hydrogen concentration in the stack shell is greater than a second hydrogen concentration threshold, the fuel cell system is shut down and a fault alarm is issued; when the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold, the fuel cell system continues to operate and the hydrogen concentration in the stack shell is detected again after the fuel cell system starts to operate for the preset time from the operation process trigger time point, wherein the operation process trigger time point is the time point when the fuel cell system is in the state of operation, when it is detected that the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold and not greater than the second hydrogen concentration threshold; When the hydrogen concentration in the stack shell is detected again after the fuel cell system has been running for the preset time from the trigger time point of the operation process, and it is determined that the hydrogen concentration in the stack shell is less than the first hydrogen concentration threshold, the fuel cell system continues to operate; when the hydrogen concentration in the stack shell is detected again and it is determined that the hydrogen concentration in the stack shell is not less than the first hydrogen concentration threshold, the fuel cell system shuts down and issues a fault alarm.

3. The control method according to claim 1 or 2, characterized in that: The stack shell is purged when the fuel cell system is started and operated normally and during the preset operation time of the fuel cell system, and / or when the fuel cell system continues to operate and during the preset operation time starting from the operation process triggering time point.

4. The control method according to claim 3, characterized in that: The purge time of the purge operation is 15 minutes.

5. The control method according to claim 1, characterized in that: The first hydrogen concentration threshold is 10000 ppm.

6. The control method according to claim 1, characterized in that: The second hydrogen concentration threshold is 35000 ppm.

7. A control system for excessive hydrogen concentration in a fuel cell stack shell, using the control method for excessive hydrogen concentration in a fuel cell stack shell according to any one of claims 1 to 6, characterized in that: include: A battery stack shell and a battery stack arranged in the battery stack shell; The stack housing is provided with a purge gas inlet and a purge gas outlet, the purge gas inlet is used for the purge gas to enter, and the purge gas outlet is used for the purge gas to flow out; A hydrogen concentration sensor, which is disposed in the fuel cell stack housing and is used to detect the hydrogen concentration in the fuel cell stack housing; A controller, wherein the controller is electrically connected to the hydrogen concentration sensor and the fuel cell stack, respectively, and the controller is used to determine the relationship between the hydrogen concentration and a first hydrogen concentration threshold and a second hydrogen concentration threshold according to the hydrogen concentration detected by the hydrogen concentration sensor, and control the fuel cell system to stop starting and issue a fault alarm, start and run normally, continue to run, or shut down and issue a fault alarm according to the determination result.

8. The control system according to claim 7, characterized in that: The controller is also used to control a purging operation on the stack casing.

9. A data processing system, characterized in that: It comprises a memory and a processor which is communicatively connected to the memory, the memory is used to store a computer program, and the processor is used to execute the computer program to implement the method for controlling excessive hydrogen concentration in a fuel cell stack shell as described in any one of claims 1-6.

10. A vehicle, characterized in that: A method for controlling excessive hydrogen concentration in a fuel cell stack shell using any one of claims 1-6.

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