CN211374657U - Hydrogen leakage monitoring system for fuel cell vehicle - Google Patents
Hydrogen leakage monitoring system for fuel cell vehicle Download PDFInfo
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- CN211374657U CN211374657U CN201920481345.1U CN201920481345U CN211374657U CN 211374657 U CN211374657 U CN 211374657U CN 201920481345 U CN201920481345 U CN 201920481345U CN 211374657 U CN211374657 U CN 211374657U
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Abstract
The utility model discloses a hydrogen leakage monitoring system for fuel cell car. The system comprises a processor and a sensor module; the processor comprises a main control module, a communication module, an alarm module, a first signal conditioning module and a second signal conditioning module; the output end of the sensor module is connected with the input end of the first signal conditioning module, and the output end of the first signal conditioning module is connected with the first input end of the main control module; the first output end and the second output end of the main control module are respectively connected with the second signal conditioning module and the alarm module; the first output end and the second output end of the alarm module are respectively connected with the sound alarm unit and the light alarm unit. The utility model discloses have high warning function in advance, can effectively remind driver and crew in the system's trouble that the very first time emergency treatment hydrogen leaked.
Description
Technical Field
The utility model belongs to the technical field of the instrument for the car, more specifically relates to a hydrogen leakage monitoring system for fuel cell car.
Background
Hydrogen energy is a clean energy source and has safety problems of flammability, explosiveness, hydrogen brittleness and the like. However, these safety hazards all occur under certain environmental conditions, and the hazard of hydrogen can be avoided by controlling the necessary conditions during use. Typically, hydrogen has a density of only 7% of air, and has greater buoyancy, diffusivity, and rapid volatility than gasoline, propane, and natural gas. High-concentration hydrogen is difficult to accumulate in the air, and if leakage occurs, the hydrogen can be rapidly diffused, and particularly in an open environment, the hydrogen can easily and rapidly escape, and the hydrogen is not easy to disperse because the hydrogen is retained in the air after gasoline is volatilized.
Many standards and specifications are established at home and abroad aiming at fuel cell automobiles, wherein more than 65% of the contents are regulations aiming at safety, and the hydrogen safety of the fuel cell automobiles mainly refers to the safety of a vehicle-mounted hydrogen system in the operation process of the fuel cell automobiles, and mainly comprises the safety of a high-voltage hydrogen supply system, a fuel cell power generation system and the like. At present, in order to ensure the safety of a vehicle-mounted hydrogen system, various enterprises mainly perform prevention and control in the aspects of material selection, hydrogen leakage monitoring, electrostatic protection, explosion prevention, flame retardance and the like.
A plurality of hydrogen leakage sensors are arranged at the positions, easy to gather and leak, of a hydrogen storage bottle opening, a passenger cabin and a fuel cell engine system of the hydrogen fuel cell vehicle for detecting the hydrogen concentration, but most of common detectors do not have an alarm function, cannot determine the hydrogen concentration range during leakage, and cannot prompt a vehicle owner to take measures in the early stage of leakage.
SUMMERY OF THE UTILITY MODEL
To the above defect or the improvement demand of prior art, the utility model provides a hydrogen leakage monitoring system for fuel cell car, its aim at solve ordinary detector and do not possess alarming function mostly, hydrogen concentration scope when can't confirm leaking can't remind the car owner to take the technical problem of measure promptly in leaking early.
To achieve the above object, according to one aspect of the present invention, there is provided a hydrogen leakage monitoring system for a fuel cell vehicle, comprising: a processor, a sensor module;
the processor includes: the alarm device comprises a main control module, a communication module, an alarm module, a first signal conditioning module and a second signal conditioning module;
the output end of the sensor module is connected with the input end of the first signal conditioning module, and the output end of the first signal conditioning module is connected with the first input end of the main control module;
the first output end and the second output end of the main control module are respectively connected with the second signal conditioning module and the alarm module; the second signal conditioning module is used for outputting an analog quantity signal and/or a digital quantity signal; a first output end and a second output end of the alarm module are respectively connected with the sound alarm unit and the light alarm unit;
the main control module is interactively connected with the communication module;
the main control module is preset with a limit range of hydrogen concentration.
The communication module is connected with the upper computer in an interactive mode; the communication module is in serial communication connection with the main control module in a CAN communication mode.
Preferably, the processor further comprises a power supply module, an output end of the power supply module is connected with the second input end of the main control module, and the input voltage of the power supply module is 9-36V.
Preferably, the power module is a voltage stabilization chip.
Preferably, the light alarm unit comprises a yellow alarm and a red alarm.
Preferably, the processor further includes a memory chip and a clock chip interactively connected to the main control module, respectively.
Preferably, the processor further includes an alarm module and a digital IO module respectively connected to the second output terminal and the third output terminal of the main control module.
Preferably, the processor further includes a digital IO module, and the third output terminal of the main control module is connected to the input terminal of the digital IO module.
Further, the upper computer is one of a whole vehicle controller, a fuel cell engine controller or a hydrogen system management controller.
Further, the sensor module is a hydrogen concentration sensor for detecting a hydrogen concentration in the air.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
(1) because the utility model provides a hydrogen leakage monitoring system for fuel cell car, including audible alarm unit and light alarm unit, have very high warning function in advance, can effectively remind driver and crew member promptly to handle the system's trouble that hydrogen leaked in the very first time. Furthermore, the utility model discloses can also launch alarm module according to different leakage circumstances under through predetermineeing different limit ranges to sound and light effect suggestion danger degree of difference make the user can take different emergency measures, safe and reliable to the circumstances of difference.
(2) Because traditional hydrogen leakage module output is mostly the analog quantity on the market, and there is the electromagnetism operating mode complicacy in the automobile body, and the analog quantity output is easily disturbed, the utility model discloses a wrong report alarm problem that is used for the hydrogen leakage monitoring device of fuel cell car CAN adopt CAN bus output or digital quantity PWM form output CAN effectively overcome and solve the interference and bring effectively reduces the emergence of the urgent shutdown phenomenon of hydrogen fuel cell engine.
(3) The utility model discloses monitoring system's treater reservation has a plurality of interfaces (analog quantity signal interface, digital quantity signal interface, CAN communication interface, IO interface), and the controller that CAN compatible different grade type if: data reading and transmission needs of VCU (vehicle control unit), FCU (hydrogen fuel cell engine controller), HCU (hydrogen system management controller).
Drawings
Fig. 1 is a schematic view of the operation of a hydrogen leakage monitoring system for a fuel cell vehicle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The utility model provides a hydrogen leakage monitoring system for fuel cell car, include: a processor, a sensor module;
the processor includes: the alarm device comprises a main control module, a communication module, an alarm module, a first signal conditioning module and a second signal conditioning module;
the output end of the sensor module is connected with the input end of the first signal conditioning module, and the output end of the first signal conditioning module is connected with the first input end of the main control module;
the first output end and the second output end of the main control module are respectively connected with the second signal conditioning module and the alarm module; the second signal conditioning module is used for outputting an analog quantity signal and/or a digital quantity signal; a first output end and a second output end of the alarm module are respectively connected with the sound alarm unit and the light alarm unit;
the main control module is interactively connected with the communication module;
the main control module is preset with a limit range of hydrogen concentration.
The main control module is a Micro Control Unit (MCU), the first limit range of the preset hydrogen concentration in the main control module is that the volume fraction of hydrogen in the air is more than or equal to 0.4% and less than 1%, the second limit range is that the volume fraction of hydrogen in the air is more than or equal to 1% and less than 2%, and the third limit range is that the volume fraction of hydrogen in the air is more than or equal to 2%.
The sensor module may be a hydrogen concentration sensor for detecting a hydrogen concentration in the air, which converts the hydrogen concentration value, i.e., a volume fraction of hydrogen in the air, into a weak electrical signal for output. The main control module can obtain the hydrogen concentration value read by the hydrogen concentration sensor, and then starts the sound alarm unit and the light alarm unit in the alarm unit according to the preset limit ranges of different hydrogen concentrations, so that the alarm unit can generate different sounds and light effects to prompt the danger degree according to different hydrogen concentration values.
The first signal conditioning module conditions and amplifies weak electric signals of the hydrogen concentration value, so that the MCU is convenient to identify and read the concentration value.
The second signal conditioning module amplifies the hydrogen concentration value read by the MCU into a standard voltage signal or current signal through the signal conditioning circuit to output analog quantity or outputs digital quantity in a PWM pulse wave form after passing through the second signal conditioning module. The analog/digital signal outputs may also be output simultaneously,
because the utility model provides a monitoring system includes audible alarm unit and light alarm unit, has very high warning function in advance, can effectively remind driver and crew in the system's trouble that the very first time emergency treatment hydrogen leaked.
Furthermore, the utility model discloses can also launch alarm module according to different leakage circumstances under through the hydrogen concentration limit range of predetermined difference to sound and the light effect suggestion danger degree of difference make the user can take different emergency measures, safe and reliable to the circumstances of difference.
The processor also comprises a power supply module, wherein the output end of the power supply module is connected with the second input end of the main control module, and the input voltage of the power supply module is 9-36V. The power supply module is a voltage stabilizing chip which can be an LM2596HVS-5.0 chip or an LM2596HVS-3.3 chip, and the output voltage of the power supply module is 3.3V or 5.0V respectively.
The power supply of the traditional hydrogen leakage module is mostly 12V or 5V power supply, if a 24V power supply system used by a commercial vehicle is very troublesome, a 24V to 12V or 24V to 5V power supply needs to be added externally, and the cost is additionally increased. The power module usually converts a 12V or 24V power supply into 5V power supply, and then converts the 5V power supply into 3.3V power supply through LM1117-3.3, so as to realize the diversification of the power supply of the hardware circuit board chip.
The utility model discloses a wide voltage range's power module (linear steady voltage chip), the 24V electrical power generating system of the 12V electrical power generating system and the commercial car that make it can compatible passenger car make the platform more unified and convenient.
The monitoring system light alarm unit comprises a yellow alarm and a red alarm, and different colors can be used for distinguishing different levels of danger degrees.
The processor also comprises a digital IO module, and the third output end of the main control module is connected with the input end of the digital IO module.
The digital IO module is used for shutting off other relevant accessories such as bottleneck valve of hydrogen system under the emergency condition, further sets up and allies oneself with alarm module, opens automatically when the hydrogen volume fraction that leaks reaches 2%, if open the fan, reduces the hydrogen concentration of gathering in the automobile body to safe level, and it is more convenient to use, safety.
The analog quantity signal output by the second signal conditioning module is one of a first voltage range of 0-5V, a second voltage range of 0-10V or a first current signal of 4-20 mA; the voltage amplitude of the digital quantity signal output by the second signal conditioning module is one of 5V, 12V or 24V. The output ranges of various currents or voltages are compatible with a plurality of platforms of passenger vehicles or commercial vehicles.
The processor also comprises a memory chip and a clock chip which are respectively and interactively connected with the main control module, and the memory chip and the clock chip are used for storing data and programs by the MCU.
The monitoring system also comprises an upper computer which is interactively connected with the communication module; wherein, the communication module is connected with the main control module in a CAN communication mode in a serial communication manner.
The upper computer is one of a whole vehicle controller, a fuel cell engine controller or a hydrogen system management controller.
And selecting analog or digital data for connection according to the type of the data received by the upper computer, and sending the value to a cab instrument for display after the upper computer receives the data information through analysis.
As shown in fig. 1, the utility model discloses monitoring system is applied to hydrogen concentration monitoring's specific working process as follows:
the sensor module collects hydrogen concentration data and outputs the hydrogen concentration data to the first signal conditioning module, and the first signal conditioning module conducts signal conditioning filtering on voltage or current signals output by the sensor module and then outputs the voltage or current signals to the main control module.
The main control module, namely the MCU identifies a signal and reads the hydrogen concentration value and then outputs the hydrogen concentration value to the second conditioning module, the second conditioning module amplifies the hydrogen concentration value into a standard voltage signal or current signal through the signal conditioning circuit and then respectively selects and outputs an analog quantity signal and/or a digital quantity signal according to the data type readable by the upper computer;
the main control module reads the hydrogen concentration value, and a first limit range is preset in the main control module, wherein the volume fraction of the hydrogen in the air is greater than or equal to 0.4% and less than 1%, a second limit range is greater than or equal to 1% and less than 2%, and a third limit range is greater than or equal to 2%.
When the main control module judges that the volume fraction of the hydrogen is within a first limit range, starting a light alarm unit in an alarm module, namely connecting the light alarm unit to an upper computer in a serial communication mode through a communication module, displaying information as primary leakage, and enabling a yellow light in a yellow alarm to flash;
when the main control module judges that the volume fraction of the hydrogen is within the second limit range, the light alarm unit and the sound alarm unit are started at the same time, information is displayed as secondary leakage, a yellow lamp in the yellow alarm is made to flash, and the buzzer sounds;
when the main control module judges that the volume fraction of the hydrogen is within a third limit range, a light alarm unit and a sound alarm unit are started at the same time, information is displayed as three-level leakage, a red light in a red alarm is enabled to flash, and a buzzer sounds;
when the main control module detects that the sensor has a fault, the information displays a dense transmission fault, so that the sensor gives an alarm when the sensor has a fault.
The main control module can further set a fourth limit range or more limit ranges as required, and the main control module is matched with various different concentration threshold values, so that the information carried by the alarm signal is more accurate, and a user can judge the leakage condition in time more conveniently. The acousto-optic signal alarm information is clear, low in cost and easy to realize.
The specific different alarm modes for different hydrogen leakage amounts are shown in the following table 1.
TABLE 1 different alarm modes for different hydrogen leakage rates
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A hydrogen leak monitoring system for a fuel cell vehicle, comprising: a processor, a sensor module;
the processor includes: the alarm device comprises a main control module, a communication module, an alarm module, a first signal conditioning module and a second signal conditioning module;
the output end of the sensor module is connected with the input end of the first signal conditioning module, and the output end of the first signal conditioning module is connected with the first input end of the main control module;
the first output end and the second output end of the main control module are respectively connected with the second signal conditioning module and the alarm module; the second signal conditioning module is used for outputting an analog quantity signal and/or a digital quantity signal; a first output end and a second output end of the alarm module are respectively connected with the sound alarm unit and the light alarm unit;
the main control module is interactively connected with the communication module;
the main control module is preset with a limit range of hydrogen concentration.
2. The hydrogen leakage monitoring system for a fuel cell vehicle according to claim 1, further comprising an upper computer, the communication module being interconnected with the upper computer; the communication module is in serial communication connection with the main control module in a CAN communication mode.
3. The hydrogen leakage monitoring system for the fuel cell vehicle as claimed in claim 1, wherein the processor further comprises a power module, an output end of the power module is connected to the second input end of the main control module, and an input voltage of the power module is 9V to 36V.
4. The hydrogen leakage monitoring system for a fuel cell vehicle according to claim 3, wherein the power supply module is a voltage stabilization chip.
5. The hydrogen leak monitoring system for a fuel cell vehicle according to claim 1, wherein the light alarm unit includes a yellow alarm and a red alarm.
6. The hydrogen leakage monitoring system for a fuel cell vehicle according to claim 1, wherein the processor further comprises a memory chip and a clock chip respectively interconnected with the main control module.
7. The hydrogen leakage monitoring system for a fuel cell vehicle of claim 1, wherein the processor further comprises a digital IO module, and the third output terminal of the main control module is connected to the input terminal of the digital IO module.
8. The hydrogen leakage monitoring system for a fuel cell vehicle according to claim 2, wherein the host computer is one of a vehicle controller, a fuel cell engine controller, or a hydrogen system management controller.
9. A hydrogen leakage monitoring system for a fuel cell vehicle according to claim 1, wherein the sensor module is a hydrogen concentration sensor for detecting a hydrogen concentration in air.
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| CN201920481345.1U CN211374657U (en) | 2019-04-11 | 2019-04-11 | Hydrogen leakage monitoring system for fuel cell vehicle |
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| CN201920481345.1U CN211374657U (en) | 2019-04-11 | 2019-04-11 | Hydrogen leakage monitoring system for fuel cell vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114361508A (en) * | 2021-12-15 | 2022-04-15 | 山东科技大学 | Controller of vehicle-mounted hydrogen system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114361508A (en) * | 2021-12-15 | 2022-04-15 | 山东科技大学 | Controller of vehicle-mounted hydrogen system |
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Effective date of registration: 20210323 Address after: 266000 Room 516, building 4, 187 Jinshui Road, Licang District, Qingdao City, Shandong Province Patentee after: Haizhuo power (Qingdao) Energy Technology Co.,Ltd. Address before: Room 03, Shang 06, 1-2 / F, commercial building 1, Vanke Jiayuan phase I, No.12, Guanggu 1st Road, Donghu New Technology Development Zone, Wuhan, Hubei 430000 Patentee before: Wuhan Zhiwei Automobile Technology Co.,Ltd. |
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