CN213692129U - Fuel cell thermostat control system - Google Patents
Fuel cell thermostat control system Download PDFInfo
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- CN213692129U CN213692129U CN202023226556.2U CN202023226556U CN213692129U CN 213692129 U CN213692129 U CN 213692129U CN 202023226556 U CN202023226556 U CN 202023226556U CN 213692129 U CN213692129 U CN 213692129U
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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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Abstract
The utility model discloses a fuel cell thermostat control system, including fuel cell, fuel cell's coolant liquid export communicates with the entry of thermostat, the thermostat is provided with first export and second export, first export communicates with the entry of heater through the pipeline, the second export communicates with the entry of radiator through the pipeline, the export of heater and the export of radiator all communicate with the entry of water pump, the export of water pump with the coolant liquid entry of fuel cell communicates; the fuel cell comprises a radiator, a first temperature sensor, a second temperature sensor and a pressure sensor, wherein the first temperature sensor is arranged at a cooling liquid inlet end of the fuel cell, the second temperature sensor and the pressure sensor are arranged at a cooling liquid outlet end of the fuel cell, and a third temperature sensor is arranged at an outlet end of the radiator. The utility model discloses a fuel cell thermostat control system has improved the temperature stability of intaking of fuel cell system.
Description
Technical Field
The utility model relates to an electrochemistry fuel cell detects technical field, in particular to fuel cell thermostat control system.
Background
A fuel cell is a chemical device that directly converts chemical energy of fuel into electric energy, and is also called an electrochemical generator, and aims to obtain a voltage for practical use. Fuel cells vary in efficiency at different operating temperatures. At low temperatures, fuel cells operate less efficiently. In order to prolong the service life of the fuel cell, the internal temperature of the fuel cell should be as uniform as possible, so that the temperature difference between inlet water and outlet water is required to be less than 10 ℃ in a general fuel cell system. At present, a thermostat is generally adopted to control the on-off of two cooling circulation loops, and the two cooling circulation loops are as follows: the cooling system comprises a large cooling circulation loop and a small cooling circulation loop, wherein the large cooling circulation loop is used for circulating cooling liquid through a radiator; the small cooling circulation loop is a circulation loop in which the cooling liquid does not flow through the radiator. The ball valve is controlled to rotate by the direct current motor, and the size circulation flow proportion of the cooling liquid is further controlled.
Currently, after the vehicle is left to stand for a period of time, the coolant temperature is reduced to ambient temperature. The vehicle is started and the coolant temperature in the small cycle increases with time. When the outlet water temperature of the cooling liquid of the fuel cell reaches the starting temperature of the thermostat, the large circulation is gradually opened. At this time, the temperature of the cooling liquid in the radiator is low. The temperature of the mixed small circulation cooling liquid and the mixed large circulation cooling liquid is lower than that of the mixed large circulation cooling liquid when the large circulation is not started, so that the water inlet temperature of the fuel cell fluctuates and is reduced, and the temperature difference between inlet water and outlet water of the fuel cell system is larger than an allowable value due to the fluctuation value of the cooling liquid under extreme conditions, so that the service life of the cell is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a fuel cell thermostat control system has improved the temperature stability of intaking of fuel cell system.
In order to achieve the above object, the utility model provides a following technical scheme:
a fuel cell thermostat control system comprises a fuel cell, wherein a cooling liquid outlet of the fuel cell is communicated with an inlet of a thermostat, the thermostat is provided with a first outlet and a second outlet, the first outlet is communicated with an inlet of a heater through a pipeline, the second outlet is communicated with an inlet of a radiator through a pipeline, an outlet of the heater and an outlet of the radiator are both communicated with an inlet of a water pump, and an outlet of the water pump is communicated with the cooling liquid inlet of the fuel cell; the fuel cell comprises a radiator, a first temperature sensor, a second temperature sensor and a pressure sensor, wherein the first temperature sensor is arranged at a cooling liquid inlet end of the fuel cell, the second temperature sensor and the pressure sensor are arranged at a cooling liquid outlet end of the fuel cell, and a third temperature sensor is arranged at an outlet end of the radiator.
Optionally, a filter is arranged on a pipeline of the water pump communicated with the fuel cell.
Optionally, the fuel cell system further comprises a bypass branch, the bypass branch is connected in parallel with the filter, a check valve is arranged on the bypass branch, and when the filter is blocked, the check valve is opened, so that the cooling liquid flows from the outlet of the water pump to the fuel cell through the bypass branch.
Optionally, the alarm device is further included, the one-way valve and the alarm device are both in communication connection with the controller, and the controller controls the alarm device to give an alarm when detecting that the one-way valve is opened.
Optionally, the alarm device is a warning light or a buzzer.
Optionally, the heater is a PTC heater.
Optionally, the first temperature sensor, the second temperature sensor, the pressure sensor and the third temperature sensor are all in communication connection with the controller.
According to the above technical scheme, the utility model provides a fuel cell thermostat control system is provided with first temperature sensor through the coolant liquid entry end at fuel cell, and fuel cell's coolant liquid exit end is provided with second temperature sensor and pressure sensor, and the exit end of radiator is provided with third temperature sensor. The outlet water temperature T3 of the large circulation and the outlet water temperature T2 of the fuel cell and the outlet water pressure P1 of the fuel cell are obtained through the sensors, the flow ratio R of the circulation loop is obtained through the P1 and the sizes of the corresponding thermostat under different opening degrees X, the expected temperature target T0 under different opening degrees is obtained, and the controller controls the opening state of the thermostat through the comparison of T0 and Tt. The temperature range of the mixed large and small circulation loops is predicted by monitoring relevant temperature points and predicting the flow distribution proportion, and the control mode of comparing the target temperature with the predicted temperature is adopted, so that the constant temperature of the system inlet water is maintained to the greatest extent, and the stability of the temperature of the fuel cell system inlet water is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fuel cell thermostat control system according to an embodiment of the present invention.
Detailed Description
The utility model discloses a fuel cell thermostat control system has improved the temperature stability of intaking of fuel cell system.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a fuel cell thermostat control system, which includes a fuel cell 1, a coolant outlet of the fuel cell 1 is communicated with an inlet of a thermostat 4, the thermostat 4 is provided with a first outlet and a second outlet, the first outlet is communicated with an inlet of a heater 5 through a pipeline, the second outlet is communicated with an inlet of a radiator 10 through a pipeline, the outlets of the heater 5 and the radiator 10 are communicated with an inlet of a water pump 7, and the outlet of the water pump 7 is communicated with the coolant inlet of the fuel cell 1. The above-mentioned communication is all through the pipeline intercommunication, of course can also be direct connection, do not limit here. The heater 5 and the radiator 10 are arranged in parallel, the circulation of the cooling liquid flowing through the radiator 10 is a large cooling circulation, and the circulation of the cooling liquid flowing through the heater 5 is a small cooling circulation.
Wherein, a first temperature sensor 6 is arranged at the cooling liquid inlet end of the fuel cell 1, a second temperature sensor 2 and a pressure sensor 3 are arranged at the cooling liquid outlet end of the fuel cell 1, and a third temperature sensor 11 is arranged at the outlet end of the radiator 10. The first temperature sensor 6 is used for detecting the water inlet temperature T1 of the fuel cell 1, the second temperature sensor 2 is used for detecting the water outlet temperature T2 of the fuel cell 1, the pressure sensor 3 is used for detecting the water outlet pressure P1 of the fuel cell 1, and the third temperature sensor 11 is used for detecting the water outlet temperature T3 of the cooling large circulation. First temperature sensor 6, second temperature sensor 2, pressure sensor 3, third temperature sensor 11, heater 5, radiator 10, thermostat 4 and water pump 7 all with controller communication connection, the controller is the thermal management controller that this technical field is commonly used, and it is no longer repeated here.
The flow ratio R of the large and small circulation loops is obtained according to the P1, the rotation speed of the water pump 7 and the different opening degrees X of the corresponding thermostat 4, specifically, after the corresponding outlet water pressure P1 and the flow values of the large and small circulation loops under the different rotation speeds of the water pump and the different opening degrees X of the thermostat are tested on a test bed, the corresponding values of the test flow ratio R are obtained, for example, as shown in the following table.
The flow rate ratio R is combined with the temperature T2 and the temperature T3, and the temperature value at the coolant inlet port of the fuel cell 1 is expected, and the expected temperature is T0. The intake water control target temperature of the fuel cell 1 is set to Tt.
T0[x]＝(R(x)*T3+T2)/(1+R(x))
Wherein T0[ x ] is the expected temperature, R (x) is the flow ratio of the large and small circulation loops, T3 is the water outlet temperature of the cooling large circulation, and T2 is the water outlet temperature of the fuel cell 1.
The utility model discloses a fuel cell thermostat control system is provided with first temperature sensor 6 through the coolant liquid entry end at fuel cell 1, and the coolant liquid exit end of fuel cell 1 is provided with second temperature sensor 2 and pressure sensor 3, and the exit end of radiator 10 is provided with third temperature sensor 11. The outlet water temperature T3 of the large circulation and the outlet water temperature T2 of the fuel cell 1 and the outlet water pressure P1 of the fuel cell 1 are obtained through the sensors, the flow ratio R of the circulation loop is obtained through the P1 and the sizes of the P1 corresponding to different opening degrees X of the thermostat 4, the expected temperature target T0 at different opening degrees is obtained, and the controller controls the opening state of the thermostat 4 through the comparison of T0 and Tt. The temperature range of the mixed large and small circulation loops is predicted by monitoring relevant temperature points and predicting the flow distribution proportion, and the control mode of comparing the target temperature with the predicted temperature is adopted, so that the constant temperature of the system inlet water is maintained to the greatest extent, and the stability of the temperature of the fuel cell system inlet water is improved.
Specifically, if the maximum value of T0[ x ] is less than Tt; the thermostat 4 maintains a small circulation loop; if Tt is within the interval T0[ x ], the thermostat 4 is opened to the corresponding opening x of the thermostat 4; if the minimum value of T0[ x ] is greater than Tt, the thermostat 4 opens the large circulation loop.
In order to avoid the accumulation of impurities in the cooling circuit into the fuel cell 1, a filter 8 is provided on a pipe through which the water pump 7 communicates with the fuel cell 1. The filter 8 filters out impurities in the cooling water to avoid affecting the service life of the fuel cell 1.
Further, a bypass branch is further arranged between the inlet end and the outlet end of the filter 8, the bypass branch is connected with the filter 8 in parallel, and a check valve 9 is arranged on the bypass branch. The check valve 9 is opened in the direction from the water pump 7 to the fuel cell 1. The opening threshold of the non-return valve 9 is chosen by the person skilled in the art as desired. By arranging the check valve 9, when the filter 8 is blocked to a certain degree, the check valve 9 is opened, so that the cooling liquid directly flows to the fuel cell 1 from the outlet of the water pump 7 through the bypass branch, and the cooling water does not pass through the filter 8 any more. By arranging the bypass branch, the system can still normally operate under the condition that the filter 8 is blocked.
In a specific embodiment, the utility model discloses a fuel cell thermostat control system still includes alarm device, check valve 9 with alarm device all with controller communication connection, the controller is when detecting that check valve 9 opens, controls alarm device reports to the police, like this for the user knows that filter 8 has blockked up, needs to be changed or the maintenance.
Specifically, the alarm device is a warning lamp or a buzzer. The heater is a PTC heater. The thermostat 4 adopts an electronic thermostat scheme. The ball valve is controlled to rotate by the direct current motor, and the flow proportion of the cooling liquid size circulation loop is further controlled.
The utility model discloses a fuel cell thermostat control system when the vehicle is stood the back and is started, along with time lapse, the cooling system temperature rises, when rising to thermostat 4 can move, the system can control thermostat 4 according to the temperature T1 of intaking that maintains fuel cell 1 near the aperture instruction of Tt and open, after cooling cycle was added to cold water in the radiator like this, can not lead to fuel cell 1's the temperature of intaking to descend too much.
In the description of the present solution, it is to be understood that the terms "upper", "lower", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present solution.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A fuel cell thermostat control system comprises a fuel cell (1), wherein a cooling liquid outlet of the fuel cell (1) is communicated with an inlet of a thermostat (4), the thermostat (4) is provided with a first outlet and a second outlet, the first outlet is communicated with an inlet of a heater (5) through a pipeline, the second outlet is communicated with an inlet of a radiator (10) through a pipeline, an outlet of the heater (5) and an outlet of the radiator (10) are both communicated with an inlet of a water pump (7), and an outlet of the water pump (7) is communicated with the cooling liquid inlet of the fuel cell (1);
the fuel cell system is characterized in that a first temperature sensor (6) is arranged at a cooling liquid inlet end of the fuel cell (1), a second temperature sensor (2) and a pressure sensor (3) are arranged at a cooling liquid outlet end of the fuel cell (1), and a third temperature sensor (11) is arranged at an outlet end of the radiator (10).
2. The fuel cell thermostat control system according to claim 1, characterized in that a filter (8) is provided on a pipe that the water pump (7) communicates with the fuel cell (1).
3. The fuel cell thermostat control system according to claim 2, characterized by further comprising a bypass branch, the bypass branch being connected in parallel with the filter (8), a check valve (9) being provided on the bypass branch, the check valve (9) being opened when the filter (8) is clogged, so that the coolant flows from the outlet of the water pump (7) to the fuel cell (1) through the bypass branch.
4. The fuel cell thermostat control system according to claim 3, characterized by further comprising an alarm device, wherein the check valve (9) and the alarm device are both in communication connection with a controller, and the controller controls the alarm device to alarm when detecting that the check valve (9) is opened.
5. The fuel cell thermostat control system of claim 4 wherein the warning device is a warning light or a buzzer.
6. The fuel cell thermostat control system according to claim 1, characterized in that the heater (5) is a PTC heater.
7. The fuel cell thermostat control system of claim 1, characterized in that the first temperature sensor (6), the second temperature sensor (2), the pressure sensor (3) and the third temperature sensor (11) are all in communication with a controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226556.2U CN213692129U (en) | 2020-12-28 | 2020-12-28 | Fuel cell thermostat control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226556.2U CN213692129U (en) | 2020-12-28 | 2020-12-28 | Fuel cell thermostat control system |
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| CN213692129U true CN213692129U (en) | 2021-07-13 |
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| CN202023226556.2U Active CN213692129U (en) | 2020-12-28 | 2020-12-28 | Fuel cell thermostat control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695916A (en) * | 2022-04-21 | 2022-07-01 | 北京亿华通科技股份有限公司 | Thermostat control method and thermostat control device of liquid cooling system of hydrogen fuel cell |
| CN114864997A (en) * | 2022-05-17 | 2022-08-05 | 太原理工大学 | Cooling system of fuel cell and control method thereof |
| CN115842144A (en) * | 2022-10-27 | 2023-03-24 | 中汽创智科技有限公司 | Fuel cell thermal management test system |
| CN116169317A (en) * | 2022-12-14 | 2023-05-26 | 江苏耀扬新能源科技有限公司 | Fuel cell system based on phase-change cooling medium and application method thereof |
-
2020
- 2020-12-28 CN CN202023226556.2U patent/CN213692129U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695916A (en) * | 2022-04-21 | 2022-07-01 | 北京亿华通科技股份有限公司 | Thermostat control method and thermostat control device of liquid cooling system of hydrogen fuel cell |
| CN114695916B (en) * | 2022-04-21 | 2023-06-16 | 北京亿华通科技股份有限公司 | Thermostat control method and device for liquid cooling system of hydrogen fuel cell |
| CN114864997A (en) * | 2022-05-17 | 2022-08-05 | 太原理工大学 | Cooling system of fuel cell and control method thereof |
| CN114864997B (en) * | 2022-05-17 | 2024-03-19 | 太原理工大学 | Cooling system of fuel cell and control method thereof |
| CN115842144A (en) * | 2022-10-27 | 2023-03-24 | 中汽创智科技有限公司 | Fuel cell thermal management test system |
| CN115842144B (en) * | 2022-10-27 | 2023-09-26 | 中汽创智科技有限公司 | Fuel cell thermal management test system |
| CN116169317A (en) * | 2022-12-14 | 2023-05-26 | 江苏耀扬新能源科技有限公司 | Fuel cell system based on phase-change cooling medium and application method thereof |
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