CN115692777A - Fuel cell automobile and method and device for detecting fault of cylinder valve of hydrogen system of fuel cell automobile - Google Patents
Fuel cell automobile and method and device for detecting fault of cylinder valve of hydrogen system of fuel cell automobile Download PDFInfo
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- CN115692777A CN115692777A CN202110859554.7A CN202110859554A CN115692777A CN 115692777 A CN115692777 A CN 115692777A CN 202110859554 A CN202110859554 A CN 202110859554A CN 115692777 A CN115692777 A CN 115692777A
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Abstract
The invention provides a fuel cell automobile and a method and a device for detecting a fault of a cylinder valve of a hydrogen system of the fuel cell automobile, and belongs to the technical field of new energy automobiles. The method comprises the following steps: (1) Collecting the internal temperature of each hydrogen cylinder in the hydrogen system before hydrogenation
And the internal temperature of each hydrogen cylinder in the hydrogen system after hydrogenation
A is more than or equal to 1 and less than or equal to N, and N is the total number of hydrogen cylinders in the hydrogen system; (2) Calculating the temperature rise amplitude of each hydrogen cylinder in the hydrogen system before and after hydrogenation
(3) Respectively judging the temperature rise range of each hydrogen cylinder if the temperature rise range of the hydrogen cylinder
If the pressure is less than or equal to the first set value, the cylinder valve of the hydrogen cylinder is judged to be in fault and cannot be normally opened. The method can quickly detect the fault hydrogen cylinder without temperature rise effect in the hydrogenation process by judging the temperature rise amplitude of the hydrogen cylinder, can quickly and accurately judge whether the cylinder valve of the hydrogen cylinder in the hydrogen system is in fault, and does not need to change the existing cylinder valve control mode.
Description
Technical Field
The invention relates to a fuel cell automobile and a method and a device for detecting a fault of a cylinder valve of a hydrogen system of the fuel cell automobile, and belongs to the technical field of new energy automobiles.
Background
The fuel cell is a device for directly converting chemical energy of fuel into electric energy, can continuously output the electric energy only by introducing the fuel and oxidant, and has the advantages of high energy conversion rate, cleanness and environmental protection. Fuel cell vehicles have become an important direction for the development of new energy vehicles due to their advantages of high efficiency, zero emission, etc.
The current hydrogen storage mode of the fuel cell vehicle is high-pressure hydrogen cylinder storage, a hydrogen system is installed on the fuel cell vehicle, the hydrogen system is connected with the hydrogen system through pipelines as shown in figure 1, the hydrogen system comprises N hydrogen cylinders, N is larger than or equal to 1, and the N hydrogen cylinders jointly provide hydrogen for the fuel cell. The cylinder valve structure and the cylinder valve mounting structure are respectively shown in figures 2 and 3, the cylinder valve is formed by integrating an electromagnetic valve, a Pressure Release Device (PRD), a temperature sensor and a manual shutoff valve, the electromagnetic valve is operated in an electric mode, and the electromagnetic valve is opened when being powered on and is in an automatic closing state when being powered off and is used for controlling hydrogen supply; the manual shutoff valve is used for manually closing the cylinder valve, and when the manual shutoff valve is closed, the hydrogen cylinder can not supply hydrogen even if the electromagnetic valve is in an open state; a temperature sensor is integrated in the cylinder valve, and the internal temperature of the hydrogen cylinder can be acquired in real time. The control principle of the cylinder valves is shown in fig. 4, all the cylinder valves in the hydrogen system supply power to the same path, and all the cylinder valves are opened or closed simultaneously according to the hydrogen demand of the fuel cell, so that the cylinder valves cannot be controlled independently.
The existing control mode for closing and opening the cylinder valve of the hydrogen system has the following problems: because can't carry out the independent control to the cylinder valve, and the solenoid valve does not have switch feedback signal in the cylinder valve, even the solenoid valve of certain cylinder valve breaks down after the power supply leads to the cylinder valve can't open also can not have the trouble suggestion, simultaneously because other hydrogen gas cylinders can normally supply air, can not influence fuel cell and normally work, consequently operating personnel can't learn to have the cylinder valve to break down, if the trouble exists always, will influence hydrogen system reliability and vehicle and continue to drive the mileage.
At present, some hydrogen cylinder valve state detection methods are also available, for example, in chinese patent application publication No. CN108177527A, a method for detecting a state of a hydrogen cylinder valve of a fuel cell vehicle is disclosed, which first changes a control mode of closing and opening an existing cylinder valve, and realizes that a vehicle controller can independently close or open one path of hydrogen cylinder valve in a fuel cell by a structural mode of high-side driving and low-side driving, and then continues to work by controlling the fuel cell in a period of time before stopping or stopping hydrogen supply, detects one path of hydrogen cylinder valve in the fuel cell, determines a working state of the hydrogen cylinder valve, and sequentially and circularly detects other path of hydrogen cylinder valves of a hydrogen system when the vehicle controller sends an instruction to stop or stop hydrogen supply next time, and determines a state of the cylinder valve. Although the method can realize the detection of the state of the cylinder valve, the control mode of closing and opening the existing cylinder valve needs to be changed, meanwhile, the judgment of the states of all the cylinder valves can be completed only by detecting for many times under a specific scene, and if the last path of hydrogen cylinder valve in the hydrogen system is in fault, the detection cannot be carried out in time.
Disclosure of Invention
The invention aims to provide a fuel cell automobile and a method and a device for detecting the fault of a cylinder valve of a hydrogen system of the fuel cell automobile, which can quickly and accurately judge whether the cylinder valve of a hydrogen cylinder in the hydrogen system has the fault or not without changing the control mode of the existing cylinder valve.
In order to achieve the above object, the present invention provides a method for detecting a cylinder valve failure in a hydrogen system of a fuel cell vehicle, the method comprising the steps of:
(1) The internal temperature of each hydrogen cylinder in the hydrogen system before hydrogenation is acquired by using a temperature sensor integrated with each hydrogen cylinder valve in the hydrogen system
And the internal temperature of each hydrogen cylinder in the hydrogen system after hydrogenation
A is more than or equal to 1 and less than or equal to N, and N is the total number of hydrogen cylinders in the hydrogen system;
(2) Calculating the temperature rise amplitude of each hydrogen cylinder in the hydrogen system before and after hydrogenation
(3) Judging the temperature rise range of each hydrogen cylinder respectively, if the temperature rise range of each hydrogen cylinder
If the pressure is less than or equal to the first set value, the cylinder valve of the hydrogen cylinder is judged to be failed and can not be normally opened.
The method for detecting the fault of the cylinder valve of the hydrogen system of the fuel cell automobile has the beneficial effects that: the method rapidly detects the fault hydrogen cylinder without temperature rise effect (namely the hydrogen cylinder with cylinder valve fault) in the hydrogenation process by judging the temperature rise amplitude of the hydrogen cylinder, and if the temperature rise amplitude of the hydrogen cylinder before and after hydrogenation
If the temperature is less than or equal to the first set value, the temperature rise range of the hydrogen cylinder is too smallIf the temperature rise effect does not occur in the hydrogen cylinder in the hydrogenation process, the cylinder valve of the hydrogen cylinder is judged to be in fault and cannot be normally opened. The method can quickly and accurately judge whether the cylinder valve of the hydrogen cylinder in the hydrogen system is in failure or not, and does not need to change the existing cylinder valve control mode.
Further, in the above method, the value of the first set value ranges from 0 ℃ to 10 ℃.
Further, in the above method, the method further comprises the steps of: if the temperature of the hydrogen cylinder rises
If the difference between the maximum temperature rise amplitude and the temperature rise amplitude of the hydrogen cylinder exceeds a second set value, the cylinder valve of the hydrogen cylinder is judged to be in fault and cannot be normally opened.
The beneficial effects of doing so are: the temperature rise amplitude of each hydrogen cylinder with the temperature rise effect is compared with the maximum temperature rise amplitude of the hydrogen cylinders in the hydrogen system, so that the hydrogen cylinders with the temperature rise effect (namely the temperature rise amplitude) are further replaced
Hydrogen cylinders with a first set value) to screen other hydrogen cylinders with cylinder valve faults, and further improve the accuracy of fault judgment of the cylinder valves of the hydrogen cylinders.
Further, in the above method, the second set value ranges from 5 ℃ to 30 ℃.
The invention also provides a device for detecting the fault of the cylinder valve of the hydrogen system of the fuel cell automobile, which comprises a processor and a memory, wherein the processor executes a computer program stored by the memory so as to realize the fault detection method of the cylinder valve of the hydrogen system of the fuel cell automobile.
The invention also provides a fuel cell automobile which comprises a vehicle body, a hydrogen system and a hydrogen system cylinder valve fault detection device, wherein the hydrogen system cylinder valve fault detection device comprises a processor and a memory, and the processor executes a computer program stored by the memory so as to realize the fuel cell automobile hydrogen system cylinder valve fault detection method.
The fuel cell automobile and the cylinder valve fault detection device of the hydrogen system of the fuel cell automobile have the beneficial effects that: the cylinder valve fault detection device for the hydrogen system of the fuel cell automobile can be used for quickly and accurately judging whether the cylinder valves of all hydrogen cylinders in the hydrogen system have faults or not, the reliability and the safety of the hydrogen system are improved, the existing cylinder valve control mode is not required to be changed, and the method is simple and easy to realize.
Drawings
FIG. 1 is a schematic diagram of a prior art hydrogen system piping connection;
FIG. 2 is a schematic diagram of a prior art cylinder valve configuration;
FIG. 3 is a schematic view of a prior art cylinder valve mounting arrangement;
FIG. 4 is a prior art cylinder valve control schematic for a hydrogen system;
FIG. 5 is a schematic diagram of a hydrogen system cylinder valve failure detection apparatus in an embodiment of the vehicle according to the present invention;
fig. 6 is a flowchart of a method for detecting a cylinder valve fault in a hydrogen system of a fuel cell vehicle in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
The embodiment of the vehicle is as follows:
the fuel cell automobile of the embodiment comprises a vehicle body, a hydrogen system and a hydrogen system cylinder valve fault detection device, wherein the hydrogen system is a hydrogen system in the prior art, the specific structure of the hydrogen system is shown in figures 1-3, and the control principle of the hydrogen system cylinder valve is shown in figure 4. Fig. 5 shows a hydrogen system cylinder valve fault detection device according to this embodiment, which includes a processor and a memory, where the memory stores a computer program operable on the processor, and the processor implements a cylinder valve fault detection method (hereinafter referred to as a cylinder valve fault detection method) of a hydrogen system of a fuel cell vehicle shown in fig. 6 when executing the computer program.
The processor refers to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The memory includes a physical device for storing information, and generally, the information is digitized and stored in a medium using an electric, magnetic, optical or the like method. For example: various memories for storing information by using an electric energy mode, such as a RAM, a ROM and the like; various memories for storing information by magnetic energy, such as hard disk, floppy disk, magnetic tape, magnetic core memory, bubble memory, and U disk; various types of memory, CD or DVD, that store information optically. Of course, there are other ways of memory, such as quantum memory, graphene memory, and so forth. The apparatus comprising the memory, the processor and the computer program is realized by the processor executing corresponding program instructions in the computer, and the processor can be loaded with various operating systems, such as windows operating system, linux system, android, iOS system and the like.
The embodiment provides a cylinder valve fault detection method as shown in fig. 6 based on a temperature rise effect generated in a hydrogen rapid filling process.
Wherein, the temperature rise effect that produces among the quick filling process of hydrogen means: the Joule-Thomson effect of hydrogen is generated when hydrogen enters a hydrogen cylinder from a hydrogen storage cylinder group through a filling device, kinetic energy of high-speed hydrogen is converted into internal energy after the high-speed hydrogen enters the hydrogen cylinder, so that the internal temperature of the hydrogen cylinder is increased in the hydrogenation process, the temperature increase amplitude depends on the hydrogenation rate, and the temperature increase amplitude is generally 10-50 ℃.
The hydrogen system is researched and found based on the temperature rise effect: because the cylinder valves of all the hydrogen cylinders in the hydrogen system are opened or closed simultaneously, when the cylinder valves of all the hydrogen cylinders in the hydrogen system are normal, theoretically, after the fuel cell stops working, the hydrogen consumed by each hydrogen cylinder is consistent, the pressure of the hydrogen left in each hydrogen cylinder is consistent, and the hydrogen pressure of each hydrogen cylinder after hydrogenation is the same, that is, the initial pressure state and the final pressure state of all the hydrogen cylinders in the hydrogen system before and after hydrogenation are consistent, and the temperature rise effect generated in the hydrogenation process of each hydrogen cylinder is the same; if the cylinder valve of a certain hydrogen cylinder cannot be normally opened after the hydrogen is filled, hydrogen in the hydrogen cylinder cannot be consumed at all in the following fuel working process, and the hydrogen cylinder cannot generate a temperature rise effect in the hydrogenation process; if all hydrogen cylinders in the hydrogen system normally work for a period of time, the cylinder valve of a hydrogen cylinder fails in the working process of a fuel cell at a certain time, so that the cylinder valve cannot be normally opened, hydrogen in the failed hydrogen cylinder cannot be consumed in the working process of the fuel cell at the certain time, hydrogen in other normal hydrogen cylinders can be normally consumed, the hydrogen pressure in the failed hydrogen cylinder is obviously higher than that of other normal hydrogen cylinders after the fuel cell stops working, and the temperature rise amplitude of the failed hydrogen cylinder is obviously lower than that of other normal hydrogen cylinders during hydrogenation again.
Based on the research result, the cylinder valve failure detection method of the embodiment is provided, and the method judges which cylinder valve of each hydrogen cylinder in the hydrogen system has a failure and cannot be normally opened by judging the magnitude of the temperature rise of each hydrogen cylinder before and after hydrogenation and comparing the temperature rise of each hydrogen cylinder in the hydrogen system before and after hydrogenation, as shown in fig. 6, the method comprises the following steps:
(1) The temperature sensor integrated with each hydrogen cylinder valve in the hydrogen system is used for collecting the internal temperature of each hydrogen cylinder in the hydrogen system before hydrogenation
And the internal temperature of each hydrogen cylinder in the hydrogen system after hydrogenation
The number of the hydrogen cylinders in the hydrogen system is defined as a, a is more than or equal to 1 and less than or equal to N, and N is the total number of the hydrogen cylinders in the hydrogen system;
(2) Calculating the temperature rise amplitude of each hydrogen cylinder in the hydrogen system before and after hydrogenation
(3) Are respectively paired withJudging the temperature rise amplitude of each hydrogen cylinder, and if the temperature rise amplitude of each hydrogen cylinder is large
(namely the first set value) which indicates that the temperature rise amplitude of the hydrogen cylinder is too small, indicates that the temperature rise effect does not occur in the hydrogen adding process of the hydrogen cylinder, and determines that the cylinder valve of the hydrogen cylinder has a fault and cannot be normally opened;
(4) If the temperature of the hydrogen cylinder rises
Comparing the temperature rise amplitude of the hydrogen cylinder with the maximum temperature rise amplitude of a hydrogen cylinder in a hydrogen system, and if the difference value between the maximum temperature rise amplitude and the temperature rise amplitude of the hydrogen cylinder exceeds 15 ℃ (namely a second set value), indicating that although the hydrogen cylinder has a temperature rise effect in the hydrogenation process, the temperature rise amplitude of the hydrogen cylinder is obviously smaller than the maximum temperature rise amplitude of the hydrogen cylinder in the hydrogen system, indicating that the hydrogen pressure in the hydrogen cylinder before the hydrogenation is obviously larger than the hydrogen pressure of other hydrogen cylinders, indicating that the hydrogen in the hydrogen cylinder is not normally consumed in the previous fuel cell working process, and then determining that the cylinder valve of the hydrogen cylinder has a fault and cannot be normally opened;
(5) And (5) judging the cylinder valve states of all hydrogen cylinders in the hydrogen system according to the step (3) and the step (4) to obtain the numbers of all hydrogen cylinders with cylinder valve faults in the hydrogen system.
In this embodiment, the first set value is 5 ℃ and the second set value is 15 ℃, as another embodiment, the values of the first set value and the second set value can be adjusted according to actual needs, as long as the value range of the first set value is 0 ℃ to 10 ℃ and the value range of the second set value is 5 ℃ to 30 ℃.
In summary, in the cylinder valve failure detection method of this embodiment, firstly, the magnitude of the temperature rise amplitude of the hydrogen cylinder is determined, so as to quickly detect a failed hydrogen cylinder without a temperature rise effect (i.e., a hydrogen cylinder with a cylinder valve failure) in the hydrogenation process, and then the temperature rise amplitude of each hydrogen cylinder with a temperature rise effect is compared with the maximum temperature rise amplitude of the hydrogen cylinder in the hydrogen system, so as to further screen out other hydrogen cylinders with a cylinder valve failure from the hydrogen cylinders with a temperature rise effect, thereby further improving the accuracy of determining a cylinder valve failure of the hydrogen cylinder; the method can quickly and accurately judge whether the cylinder valves of all hydrogen cylinders in the hydrogen system are in fault or not, and does not need to change the existing cylinder valve control mode.
The embodiment of the device is as follows:
the cylinder valve fault detection device of the hydrogen system of the fuel cell automobile in the embodiment is the same as that in the embodiment of the vehicle, and the description is omitted here.
The method comprises the following steps:
the method for detecting the cylinder valve fault of the hydrogen system of the fuel cell vehicle in the embodiment is the same as the method for detecting the cylinder valve fault of the hydrogen system of the fuel cell vehicle in the vehicle embodiment, and the detailed description is omitted here.
Claims (6)
1. A method for detecting the fault of a cylinder valve of a hydrogen system of a fuel cell automobile is characterized by comprising the following steps:
(1) The internal temperature of each hydrogen cylinder in the hydrogen system before hydrogenation is acquired by using a temperature sensor integrated with each hydrogen cylinder valve in the hydrogen system
And the internal temperature of each hydrogen cylinder in the hydrogen system after hydrogenation
A is more than or equal to 1 and less than or equal to N, and N is the total number of hydrogen cylinders in the hydrogen system;
(2) Calculating the temperature rise amplitude of each hydrogen cylinder in the hydrogen system before and after hydrogenation
(3) Respectively judging the temperature rise range of each hydrogen cylinder if the temperature rise range of the hydrogen cylinder
Then the cylinder valve of the hydrogen cylinder is judged to be faulty and can not be normally opened.
2. The method for detecting the fault of the cylinder valve of the hydrogen system of the fuel cell vehicle according to claim 1, wherein the first set value ranges from 0 ℃ to 10 ℃.
3. The method for detecting the cylinder valve fault of the hydrogen system of the fuel cell vehicle as claimed in claim 1 or 2, wherein the method further comprises the steps of: if the temperature of the hydrogen cylinder rises
Comparing the temperature rise amplitude of the hydrogen cylinder with the maximum temperature rise amplitude of the hydrogen cylinder in the hydrogen system, and if the difference value between the maximum temperature rise amplitude and the temperature rise amplitude of the hydrogen cylinder exceeds a second set value, judging that the cylinder valve of the hydrogen cylinder has a fault and cannot be normally opened.
4. The method for detecting the fault of the cylinder valve of the hydrogen system of the fuel cell vehicle as claimed in claim 3, wherein the second set value ranges from 5 ℃ to 30 ℃.
5. A fuel cell vehicle hydrogen system cylinder valve fault detection device, characterized in that the device comprises a processor and a memory, wherein the processor executes a computer program stored by the memory to realize the fuel cell vehicle hydrogen system cylinder valve fault detection method according to any one of claims 1 to 4.
6. A fuel cell automobile comprising a vehicle body, a hydrogen system, and a hydrogen system cylinder valve failure detection device, characterized in that the hydrogen system cylinder valve failure detection device comprises a processor and a memory, the processor executing a computer program stored by the memory to implement the fuel cell automobile hydrogen system cylinder valve failure detection method according to any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859554.7A CN115692777A (en) | 2021-07-28 | 2021-07-28 | Fuel cell automobile and method and device for detecting fault of cylinder valve of hydrogen system of fuel cell automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859554.7A CN115692777A (en) | 2021-07-28 | 2021-07-28 | Fuel cell automobile and method and device for detecting fault of cylinder valve of hydrogen system of fuel cell automobile |
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| CN115692777A true CN115692777A (en) | 2023-02-03 |
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| CN202110859554.7A Pending CN115692777A (en) | 2021-07-28 | 2021-07-28 | Fuel cell automobile and method and device for detecting fault of cylinder valve of hydrogen system of fuel cell automobile |
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| CN (1) | CN115692777A (en) |
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- 2021-07-28 CN CN202110859554.7A patent/CN115692777A/en active Pending
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