CN110718707A - Fuel cell cooling medium conductivity monitoring system, monitoring method and vehicle - Google Patents
Fuel cell cooling medium conductivity monitoring system, monitoring method and vehicle Download PDFInfo
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- CN110718707A CN110718707A CN201910950707.1A CN201910950707A CN110718707A CN 110718707 A CN110718707 A CN 110718707A CN 201910950707 A CN201910950707 A CN 201910950707A CN 110718707 A CN110718707 A CN 110718707A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/33—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04559—Voltage of fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04664—Failure or abnormal function
- H01M8/04679—Failure or abnormal function of fuel cell stacks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a system and a method for monitoring conductivity of a cooling medium of a fuel cell and a vehicle, and relates to the technical field of electric vehicles. Wherein, fuel cell cooling medium conductivity monitoring device includes: the fuel cell stack includes a coolant line through which a coolant flows. And the two conductive rods are arranged at the cooling medium pipeline at intervals and used for detecting the voltage of the cooling medium. And the controller is connected with the two conductive rods and used for receiving the voltage value of the cooling medium detected by the conductive rods, monitoring the conductivity of the cooling medium and controlling the vehicle to alarm and/or controlling the fuel cell stack to stop reacting according to the conductivity of the cooling medium. The device and the method for monitoring the conductivity of the cooling medium of the fuel cell avoid the problem of short circuit of a whole vehicle system caused by the conduction of the cooling medium due to the entry of ions into the cooling medium, avoid accidents, and avoid the influence on the service life of the fuel cell stack due to the rise of the temperature gradient in the fuel cell stack.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a system and a method for monitoring conductivity of a cooling medium of a fuel cell and a vehicle.
Background
The problem of energy and environmental protection has become an important factor restricting the sustainable development of China, and the research and development of fuel cells are increasingly paid attention by governments of various countries as one of the selectable approaches for solving the problems of energy and environmental protection. Particularly, hydrogen fuel cells have no pollution because hydrogen energy is a recognized clean energy source and a reactant is water. There is a plan for commercialization of hydrogen fuel cells in each country and each large automobile group. The essence of a hydrogen fuel cell is the process by which hydrogen and oxygen undergo a redox reaction to convert chemical energy into electrical energy. The energy which is not converted into electric energy in the reaction process and the reaction process is emitted in the form of heat, and if the heat generation rate is too high, the temperature gradient in the fuel cell and the stack is increased, thereby having negative influence on the performance of the fuel cell. Automotive fuel cells therefore require sufficiently efficient cooling to maintain optimum operating temperatures while avoiding the creation of temperature gradients within the stack. The stack is therefore typically cooled by forced convection cooling. When the cooling medium flows through the cell stack, ions in the cell stack may permeate into the cooling medium, and the cooling medium conducts electricity along with the increase of the ions, so that the system self-protection stops working, and the cell stack is damaged in severe cases. Therefore, the conductivity of the cooling medium can be monitored in real time, and early warning is very important.
Disclosure of Invention
The invention aims to provide a fuel cell cooling medium conductivity monitoring system, which can prevent the short circuit problem of a whole vehicle system caused by the conduction of a cooling medium and avoid accidents;
another object of the present invention is to prevent the fuel cell self-protection scram problem and avoid the temperature gradient rise in the stack, which affects the life of the stack.
It is yet another object of the present invention to provide a fuel cell cooling medium conductivity monitoring method.
It is a further object of the present invention to provide a vehicle having the above fuel cell cooling medium conductivity monitoring device.
In particular, the present invention provides a fuel cell cooling medium conductivity monitoring device comprising:
a fuel cell stack including a cooling medium line in which a cooling medium flows;
the two conductive rods are arranged at the position of the cooling medium pipeline at intervals, and each conductive rod is in contact with the cooling medium and used for detecting the voltage of the cooling medium;
and the controller is connected with the two conductive rods and used for receiving the voltage value of the cooling medium detected by the conductive rods, monitoring the conductivity of the cooling medium and controlling the vehicle to alarm and/or controlling the fuel cell stack to stop reacting according to the conductivity of the cooling medium.
Optionally, the method further comprises:
a temperature sensor provided at the cooling medium pipe and in contact with the cooling medium, for detecting a temperature of the cooling medium; the temperature sensor is also connected with the controller to transmit the temperature value of the cooling medium to the controller, so that the controller corrects the voltage value according to the temperature value to obtain a corrected voltage value.
Optionally, the method further comprises:
the alarm system is connected with the controller;
the controller is configured to control the alarm system to alarm when the corrected voltage value is larger than a first threshold value so as to prompt a driver that the cooling medium is conductive and corresponding measures need to be taken.
Optionally, the controller is configured to control the fuel cell stack to stop reacting while controlling the alarm system to alarm when the corrected voltage value is greater than a second threshold value, so as to avoid an accident;
wherein the first threshold is less than the second threshold.
Optionally, the alarm system comprises a display screen, an audible alarm and/or a voice announcer.
In particular, the invention also provides a fuel cell cooling medium conductivity monitoring method, which comprises the following steps:
detecting a voltage signal of a cooling medium of a fuel cell stack of a vehicle in real time to obtain a corresponding voltage value;
judging whether the voltage value is larger than a preset threshold value or not;
if the current value is larger than the preset value, the cooling medium is judged to have conductivity, and the vehicle is controlled to give an alarm and/or the fuel cell stack is controlled to stop reaction according to the conductivity of the cooling medium so as to ensure the safety of the vehicle.
Optionally, the voltage signal of the cooling medium is detected, and meanwhile, the temperature signal of the cooling medium is detected, so as to obtain a corresponding temperature value;
correcting the voltage value according to the temperature value;
and comparing and judging the corrected voltage value with the threshold value.
Optionally, the threshold comprises a first threshold;
and judging whether the corrected voltage value is greater than the first threshold value, and controlling an alarm system of the vehicle to give an alarm to prompt a driver that the cooling medium is conductive when the corrected voltage value is greater than the first threshold value, wherein corresponding protective measures are required to be taken to ensure the safety of the vehicle.
Optionally, the threshold further comprises a second threshold, the first threshold being smaller than the second threshold;
and when the corrected voltage value is judged to be larger than the first threshold value, continuously judging whether the corrected voltage value is larger than the second threshold value, and when the corrected voltage value is judged to be larger than the second threshold value, controlling an alarm system of the vehicle to give an alarm and simultaneously controlling the fuel cell stack to stop reacting so as to ensure the safety of the vehicle.
In particular, the invention also provides a vehicle including the fuel cell cooling medium conductivity monitoring device described above.
According to the device and the method for monitoring the conductivity of the cooling medium of the fuel cell, the voltage value of the cooling medium is detected by arranging the conductive rod in the cooling medium, and the conductivity of the cooling medium can be obtained according to the voltage value, so that whether ions permeate into the cooling medium in the fuel cell stack or not is known, corresponding actions are timely performed, the problem that the whole vehicle system is short-circuited due to the fact that the cooling medium conducts electricity when the ions enter the cooling medium is avoided, accidents are avoided, and meanwhile, the problem that the service life of the fuel cell stack is influenced due to the fact that the temperature gradient in the fuel cell stack rises is avoided.
Furthermore, the device for monitoring the conductivity of the cooling medium of the fuel cell is also provided with the temperature sensor, and the resistance of the liquid has strong correlation with the liquid components and the temperature, so that the measurement accuracy can be improved by actually measuring the temperature of the cooling medium and correcting the detected voltage value of the cooling medium.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural view of a fuel cell cooling medium conductivity monitoring apparatus according to an embodiment of the invention;
FIG. 2 is a schematic flow diagram of a fuel cell cooling medium conductivity monitoring method according to an embodiment of the invention;
fig. 3 is a schematic flow diagram of a fuel cell cooling medium conductivity monitoring method according to another embodiment of the invention.
Detailed Description
Fig. 1 is a schematic structural view of a fuel cell cooling medium conductivity monitoring apparatus 100 according to an embodiment of the present invention. The fuel cell cooling medium conductivity monitoring apparatus 100 of the present embodiment may include a fuel cell stack 10, two conductor bars 20, and a controller 30. Wherein. The fuel cell stack 10 may include a cooling medium line 11 through which a cooling medium flows in the cooling medium line 11. Two conductive rods 20 are arranged at intervals at the cooling medium pipeline 11, and each conductive rod 20 is in contact with the cooling medium and is used for detecting the voltage of the cooling medium. The controller 30 is connected with the two conductive rods 20 and is used for receiving the voltage value of the cooling medium detected by the conductive rods 20, monitoring the conductivity of the cooling medium, and controlling the vehicle alarm and/or controlling the fuel cell stack to stop reacting according to the conductivity of the cooling medium.
In the present embodiment, two current-conducting rods 20 are disposed at the coolant pipeline 11 of the fuel cell stack 10, and the coolant pipeline 11 may be a selected section of pipeline, and the length of the pipeline may be determined according to the situation. This conducting rod 20 can detect the voltage of cooling medium, can obtain the electric conductivity of cooling medium according to the voltage value to know whether have the ion to permeate to the cooling medium in the fuel cell stack 10, and then timely make corresponding action (for example, the vehicle reports to the police and/or control the fuel cell stack and stops the reaction), avoid making the cooling medium electrically conductive because of the ion gets into the cooling medium and cause whole car system short circuit problem, avoid the occurence of failure, avoid the temperature gradient in the fuel cell stack 10 to rise simultaneously, influence the life-span of fuel cell stack 10.
The fuel cell cooling medium conductivity monitoring apparatus 100 of the present invention as one specific embodiment of the present invention may further include a temperature sensor 40. The temperature sensor 40 is provided at the cooling medium line 11 and is in contact with the cooling medium for detecting the temperature of the cooling medium. The temperature sensor 40 is also connected to the controller 30 to transmit the temperature value of the cooling medium to the controller 30, so that the controller 30 corrects the voltage value according to the temperature value to obtain a corrected voltage value. Because the resistance of the liquid has strong correlation with the liquid components and the temperature, the measured temperature of the cooling medium is passed through to ensure the measurement accuracy, and the detected voltage value of the cooling medium is corrected, so that the measurement accuracy can be improved.
As a specific embodiment of the present invention, the fuel cell cooling medium conductivity monitoring apparatus 100 of the present invention may further include an alarm system 50. Specifically, the alarm system 50 is connected to the controller 30. The controller 30 is configured to control the warning system 50 to warn the driver when the corrected voltage value is greater than the first threshold value to indicate to the driver that the cooling medium is conductive and that a corresponding action is required. Specifically, the alarm system 50 includes a display screen, an audible alarm, and/or a voice announcer. That is, when the corrected voltage value is greater than the first threshold value, the vehicle interior may display an alarm message on a display screen, where the display screen may be in a form of flashing a warning symbol or in a form of a character and the display screen may indicate to the user that the cooling medium is conductive at that time. In addition, the alarm system 50 may be an audible alarm or a voice announcement. Or a combination of a display screen and speech.
As a specific embodiment of the present invention, the controller 30 is configured to control the fuel cell stack 10 to stop reacting while controlling the alarm system 50 to alarm when the corrected voltage value is greater than the second threshold value, so as to avoid an accident; wherein the first threshold is less than the second threshold. When the corrected voltage value is larger than the second threshold value, the problem that the number of ions in the cooling medium is large, and the whole vehicle cannot be reversed if timely adjustment is not made is solved. Therefore, if the voltage value at this time is greater than the second threshold value, the controller 30 directly controls the alarm system 50 to alarm and controls the fuel cell stack 10 to stop operating. Therefore, the driver is forced to stop the vehicle in time to check the condition of the vehicle, and accidents are prevented.
The temperature correction principle in this embodiment is as follows:
the temperature of the cooling medium is set to 25 ℃, and the voltage values at the two ends of the two conductor bars under different concentrations are detected by changing the ion concentration in the section of the medium, so that the following table is obtained.
TABLE 1 Voltage values at different ion concentrations at 25 ℃ of the medium
| Ion concentration | X1 | X2 | X3 |
| Value of voltage | V1 | V2 | V3 |
The voltage value V2 is set to the first threshold value and V3 is set to the second threshold value.
In consideration of the influence of the temperature on the resistance value of the medium, a correction value equivalent to a voltage at 25 ℃ can be obtained by changing the temperature of the medium according to the formula (1) at the same ion concentration. And finally, checking the table through the medium temperature to obtain a voltage correction value based on the temperature.
a＝/(1-(V25÷VT))÷(T-25)/........(1)
Wherein, a-correction factor; v25-25 deg.C voltage value; VT-voltage value measured when the medium temperature is T; t-medium temperature.
TABLE 2 correction factor equivalent to 25 ℃ voltage value at the same ion concentration
| Temperature of the medium | T1 | T2 | T3 |
| Correction factor | a1 | a2 | a3 |
Fig. 2 is a schematic flow diagram of a fuel cell cooling medium conductivity monitoring method according to an embodiment of the invention. The invention also provides a method for monitoring the conductivity of the cooling medium of the fuel cell as a specific embodiment of the invention. The fuel cell cooling medium conductivity monitoring method may further include:
s10, detecting the voltage signal of the cooling medium of the fuel cell stack of the vehicle in real time to obtain a corresponding voltage value;
s20, judging whether the voltage value is larger than the preset threshold value;
and if the S30 is larger than the preset value, judging that the cooling medium has conductivity, and controlling the vehicle to alarm and/or controlling the fuel cell stack to stop reaction according to the conductivity of the cooling medium so as to ensure the safety of the vehicle.
The method for monitoring the conductivity of the cooling medium of the fuel cell stack 10 in the embodiment obtains the conductivity of the cooling medium by detecting the voltage signal of the cooling medium, and can timely advance the vehicle according to the conductivity of the cooling medium, thereby preventing the short circuit problem of the whole vehicle system caused by the conductivity of the cooling medium and avoiding the occurrence of accidents; while avoiding temperature gradients within the fuel cell stack 10 from rising and affecting the life of the fuel cell stack 10.
Fig. 2 is a schematic flow diagram of a fuel cell cooling medium conductivity monitoring method according to an embodiment of the invention. As a specific example of the present invention, the fuel cell cooling medium conductivity monitoring method of the present embodiment may further include:
f10 detects the voltage signal of the cooling medium and the temperature signal of the cooling medium at the same time to obtain a corresponding temperature value;
f20 correcting the voltage value according to the temperature value;
and comparing and judging the corrected voltage value with a threshold value.
In this embodiment, since the resistance of the liquid has a strong correlation with the liquid components and the temperature, the voltage value is corrected by the actually measured temperature of the cooling medium in order to ensure the measurement accuracy, and the measurement accuracy is improved.
In one particular embodiment, the first and second electrodes, in this embodiment,
f30 determining whether the corrected voltage value is not 0;
if not, the cooling medium is free of ions, and all the steps are normal.
If yes, the ion exists in the cooling medium, and then the next action is carried out.
As a specific embodiment of the present invention, the threshold value includes a first threshold value;
f40, judging whether the corrected voltage value is greater than the first threshold value after judging whether the corrected voltage value is not 0;
f50 when the corrected voltage value is larger than the first threshold value, the alarm system 50 of the vehicle is controlled to give an alarm to prompt the driver that the cooling medium is conductive, and corresponding protective measures are needed to ensure the safety of the vehicle.
Generally, when the corrected voltage value is larger than a first threshold value, it is indicated that a certain amount of ions are contained in the cooling medium, the number of the ions is small at the moment, the influence on a vehicle system is not particularly serious, a driver is only required to be reminded of carrying out maintenance as soon as possible by alarming, and the problem of short circuit of the whole vehicle system caused by the conduction of the cooling medium can be effectively avoided by timely removing faults, so that accidents are avoided.
As a specific embodiment of the present invention, the threshold value further includes a second threshold value;
f60, when it is determined that the corrected voltage value is greater than the first threshold, it is continuously determined whether the corrected voltage value is greater than the second threshold.
And F70, when the corrected voltage value is judged to be larger than the second threshold value, controlling the warning system 50 of the vehicle to give a warning and simultaneously controlling the fuel cell stack 10 to stop reacting so as to ensure the safety of the vehicle.
Obviously, in the present embodiment, the second threshold is greater than the first threshold, and when the corrected voltage value is greater than the second threshold, it indicates that there are more ions in the cooling medium at this time, and a fault may occur at any time, so to ensure system safety, the fuel cell stack 10 is directly controlled to stop working while alarming, so as to perform self-protection and prevent an accident.
As a specific embodiment of the present invention, the present embodiment also provides a vehicle including the above fuel cell cooling medium conductivity monitoring apparatus 100. The vehicle with the fuel cell cooling medium conductivity monitoring device 100 can detect the conductivity of the cooling medium of the Niger battery of the vehicle through the fuel cell cooling medium conductivity monitoring device 100, thereby knowing whether ions permeate into the cooling medium in the fuel cell stack 10 or not, and further timely making corresponding actions, avoiding the problem that the whole vehicle system is short-circuited due to the fact that the cooling medium conducts electricity as the ions enter the cooling medium, avoiding accidents, and simultaneously avoiding the temperature gradient rise in the fuel cell stack 10 and influencing the service life of the fuel cell stack 10.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A fuel cell cooling medium conductivity monitoring device, comprising:
a fuel cell stack including a cooling medium line in which a cooling medium flows;
the two conductive rods are arranged at the position of the cooling medium pipeline at intervals, and each conductive rod is in contact with the cooling medium and used for detecting the voltage of the cooling medium; and
and the controller is connected with the two conductive rods and used for receiving the voltage value of the cooling medium detected by the conductive rods, monitoring the conductivity of the cooling medium and controlling the vehicle to alarm and/or controlling the fuel cell stack to stop reacting according to the conductivity of the cooling medium.
2. The fuel cell cooling medium conductivity monitoring device according to claim 1, further comprising:
a temperature sensor provided at the cooling medium pipe and in contact with the cooling medium, for detecting a temperature of the cooling medium; the temperature sensor is also connected with the controller to transmit the temperature value of the cooling medium to the controller, so that the controller corrects the voltage value according to the temperature value to obtain a corrected voltage value.
3. The fuel cell cooling medium conductivity monitoring device according to claim 2, further comprising:
the alarm system is connected with the controller;
the controller is configured to control the alarm system to alarm when the corrected voltage value is larger than a first threshold value so as to prompt a driver that the cooling medium is conductive and corresponding measures need to be taken.
4. The fuel cell cooling medium conductivity monitoring device according to claim 3,
the controller is configured to control the fuel cell stack to stop reacting while controlling the alarm system to alarm when the corrected voltage value is larger than a second threshold value so as to avoid accidents;
wherein the first threshold is less than the second threshold.
5. The fuel cell cooling medium conductivity monitoring device according to claim 4,
the alarm system comprises a display screen, a sound alarm and/or a voice broadcaster.
6. A fuel cell cooling medium conductivity monitoring method, comprising:
detecting a voltage signal of a cooling medium of a fuel cell stack of a vehicle in real time to obtain a corresponding voltage value;
judging whether the voltage value is larger than a preset threshold value or not;
if the current value is larger than the preset value, the cooling medium is judged to have conductivity, and the vehicle is controlled to give an alarm and/or the fuel cell stack is controlled to stop reaction according to the conductivity of the cooling medium so as to ensure the safety of the vehicle.
7. The fuel cell cooling medium conductivity monitoring method according to claim 6,
detecting a voltage signal of the cooling medium and a temperature signal of the cooling medium at the same time to obtain a corresponding temperature value;
correcting the voltage value according to the temperature value;
and comparing and judging the corrected voltage value with the threshold value.
8. The fuel cell cooling medium conductivity monitoring method according to claim 7,
the threshold comprises a first threshold;
and judging whether the corrected voltage value is greater than the first threshold value, and controlling an alarm system of the vehicle to give an alarm to prompt a driver that the cooling medium is conductive when the corrected voltage value is greater than the first threshold value, wherein corresponding protective measures are required to be taken to ensure the safety of the vehicle.
9. The fuel cell cooling medium conductivity monitoring method according to claim 8,
the threshold values further comprise a second threshold value, the first threshold value being less than the second threshold value;
and when the corrected voltage value is judged to be larger than the first threshold value, continuously judging whether the corrected voltage value is larger than the second threshold value, and when the corrected voltage value is judged to be larger than the second threshold value, controlling an alarm system of the vehicle to give an alarm and simultaneously controlling the fuel cell stack to stop reacting so as to ensure the safety of the vehicle.
10. A vehicle characterized by comprising the fuel cell cooling medium conductivity monitoring device according to any one of claims 1 to 5.
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| CN201910950707.1A CN110718707A (en) | 2019-10-08 | 2019-10-08 | Fuel cell cooling medium conductivity monitoring system, monitoring method and vehicle |
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| CN201910950707.1A CN110718707A (en) | 2019-10-08 | 2019-10-08 | Fuel cell cooling medium conductivity monitoring system, monitoring method and vehicle |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002313377A (en) * | 2001-04-12 | 2002-10-25 | Nissan Motor Co Ltd | Conductivity controlling device of fuel cell system |
| US20030193009A1 (en) * | 2002-04-11 | 2003-10-16 | Dill Norman J. | Fuel cell stack coolant conductivity monitoring circuit |
| CN101267043B (en) * | 2007-03-12 | 2010-09-29 | 通用汽车环球科技运作公司 | Method and apparatus for monitoring fuel cells |
| CN104051759A (en) * | 2013-03-15 | 2014-09-17 | 通用汽车环球科技运作有限责任公司 | Estimating coolant conductivity in a multi-voltage fuel cell system |
| DE102014018307A1 (en) * | 2014-12-10 | 2015-06-18 | Daimler Ag | Device for increasing the electrical insulation resistance |
| CN204720509U (en) * | 2015-05-08 | 2015-10-21 | 郑州宇通客车股份有限公司 | A kind of fuel cell cooling system and use the vehicle of this system |
| CN107870187A (en) * | 2017-12-15 | 2018-04-03 | 杭州遥测物联网技术有限公司 | The drinking water conductivity measuring method and measuring circuit of a kind of low-cost and high-precision |
-
2019
- 2019-10-08 CN CN201910950707.1A patent/CN110718707A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002313377A (en) * | 2001-04-12 | 2002-10-25 | Nissan Motor Co Ltd | Conductivity controlling device of fuel cell system |
| US20030193009A1 (en) * | 2002-04-11 | 2003-10-16 | Dill Norman J. | Fuel cell stack coolant conductivity monitoring circuit |
| CN101267043B (en) * | 2007-03-12 | 2010-09-29 | 通用汽车环球科技运作公司 | Method and apparatus for monitoring fuel cells |
| CN104051759A (en) * | 2013-03-15 | 2014-09-17 | 通用汽车环球科技运作有限责任公司 | Estimating coolant conductivity in a multi-voltage fuel cell system |
| US20140266223A1 (en) * | 2013-03-15 | 2014-09-18 | GM Global Technology Operations LLC | Estimating coolant conductivity in a multi-voltage fuel cell system |
| DE102014018307A1 (en) * | 2014-12-10 | 2015-06-18 | Daimler Ag | Device for increasing the electrical insulation resistance |
| CN204720509U (en) * | 2015-05-08 | 2015-10-21 | 郑州宇通客车股份有限公司 | A kind of fuel cell cooling system and use the vehicle of this system |
| CN107870187A (en) * | 2017-12-15 | 2018-04-03 | 杭州遥测物联网技术有限公司 | The drinking water conductivity measuring method and measuring circuit of a kind of low-cost and high-precision |
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