A thermal management system for a hydrogen fuel cell system test platform

Abstract

The utility model provides a kind of heat management system for hydrogen fuel cell system test platform, including circulating pump, multiple parallelly arranged heat exchanger downstream of circulating pump;Connected with the cooling backflow line and heat exchange backflow line of heat exchanger;Cooling backflow line includes being connected with cooling liquid output line and cooling liquid backflow line;Cooling liquid output line is provided with first flow regulating valve and first temperature sensor;Cooling liquid backflow line is provided with second flow regulating valve and second temperature sensor;Cooling liquid output line is provided with first regulating valve;Heat exchange backflow line includes heat exchange liquid output line and heat exchange liquid backflow line, and heat exchange liquid backflow line is provided with first switch valve.Combination multiple parallel heat exchanger with multistage temperature sensor and pressure stabilizing device, high-precision temperature control to fuel cell test platform is realized, with the advantages of improving temperature control precision, enhancing system response speed, improving multi-working condition test stability.

Description

Technical Field

[0001] This utility model relates to the field of thermal management system technology, and more specifically, to a thermal management system for a hydrogen fuel cell system testing platform. Background Technology

[0002] Hydrogen fuel cell systems are complex nonlinear systems with multiple dimensions and high parameter sensitivity. Hardware-in-the-loop (HIL) simulation testing can comprehensively evaluate their performance and ensure their safety and reliability in applications.

[0003] However, hydrogen fuel cells are complex systems involving physicochemical processes, characterized by multiple inputs and outputs, strong nonlinearity, and coupling, making virtual simulation testing models highly complex and challenging. To study the nature and operating characteristics of hydrogen fuel cells, it is necessary to establish a fuel cell system model based on the fuel cell reaction mechanism and the structure of each subsystem and accessory.

[0004] However, the physicochemical processes of hydrogen fuel cells are complex, requiring consideration of multiple processes such as hydrogen and oxygen transport, electrode reactions, and electrolyte transport. Furthermore, the performance of hydrogen fuel cells is affected by many factors, including temperature, humidity, and gas flow rate. Temperature control is achieved through a thermal management system. How to achieve precise temperature control to ensure the hydrogen fuel cell system model operates at the optimal temperature at all times, thereby guaranteeing the model's effectiveness and improving the accuracy of simulation calculations, is a pressing issue that needs to be addressed. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a thermal management system for a hydrogen fuel cell system testing platform to solve the above problems.

[0006] The present invention adopts the following solution:

[0007] This application provides a thermal management system for a hydrogen fuel cell system test platform, including a circulation pump; multiple heat exchangers connected in parallel downstream of the circulation pump; a cooling return pipeline connected to the heat exchangers; and a heat exchange return pipeline connected to the heat exchangers.

[0008] The cooling return pipeline includes a coolant output pipeline connected to the first outlet of the heat exchanger, and a coolant return pipeline connected to the coolant output pipeline and to the first inlet of the heat exchanger. A first flow regulating valve and a first temperature sensor are provided on the coolant output pipeline. A second flow regulating valve and a second temperature sensor are provided on the coolant return pipeline. A first regulating valve is provided on the coolant output pipeline and is positioned upstream of the first flow regulating valve. The heat exchange return pipeline includes a heat exchange liquid output pipeline connected to the second outlet of the heat exchanger, and a heat exchange liquid return pipeline connected to the heat exchange liquid output pipeline and to the second inlet of the heat exchanger via a refrigeration device. A first switching valve is provided on the heat exchange liquid return pipeline upstream of the second inlet of each heat exchanger.

[0009] Furthermore, a branch line is provided between the coolant output line and the coolant return line, through which the coolant flows from the coolant output line to the coolant return line, and a valve is provided on the branch line.

[0010] Furthermore, a heater is provided between the circulating pump and the heat exchanger.

[0011] Furthermore, a flow meter is installed on the coolant return pipeline.

[0012] Furthermore, a third temperature sensor is installed on the heat exchange fluid output pipeline; a fourth temperature sensor is installed on the heat exchange fluid return pipeline; and a second regulating valve is installed on the heat exchange fluid return pipeline.

[0013] Furthermore, pressure transmitters are installed on the coolant output pipeline, the coolant return pipeline, and the heat exchanger return pipeline.

[0014] Furthermore, a filter is installed upstream of the circulating pump.

[0015] Furthermore, a fifth temperature sensor is installed upstream of the circulating pump; and a sixth temperature sensor is installed downstream of the heater.

[0016] Furthermore, a closed immersion tank is provided upstream of the circulating pump; the immersion tank is provided with an inlet pipe, and a second switch valve is provided on the inlet pipe; a drain pipe is provided downstream of the immersion tank.

[0017] Furthermore, a purging circuit is connected to the immersion tank.

[0018] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0019] This application provides a thermal management system for a hydrogen fuel cell system test platform. By combining multiple parallel heat exchangers with multi-stage temperature sensors and a voltage regulator, it achieves high-precision temperature control of the fuel cell test platform, which has the advantages of improving temperature control accuracy, enhancing system response speed, and improving the stability of multi-condition testing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a thermal management system for a hydrogen fuel cell system testing platform according to an embodiment of the present invention;

[0022] Icons: Circulating pump 1, Heat exchanger 2, Coolant output line 3, Coolant return line 4, First flow regulating valve 5, First temperature sensor 6, Second flow regulating valve 7, Second temperature sensor 8, First regulating valve 9, Heat exchanger output line 10, Heat exchanger return line 11, Third temperature sensor 12, Fourth temperature sensor 13, Second regulating valve 14, Fifth temperature sensor 15, Sixth temperature sensor 16, Branch line 17, Valve 18, Heater 19, Pressure transmitter 20, Filter 21, Flow meter 22, Immersion tank 23, Inlet line 24, Second switching valve 25, Drain line 26, Purge circuit 27, First switching valve 28. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Example

[0025] Combination Figure 1 As shown, this embodiment provides a thermal management system for a hydrogen fuel cell system test platform. Specifically, it includes a circulation pump 1, and three heat exchangers 2 connected in parallel downstream of the circulation pump 1; a cooling return pipeline connected to the heat exchangers 2; and a heat exchange return pipeline connected to the heat exchangers 2.

[0026] In this embodiment, the heat exchanger 2 is a plate heat exchanger 2, and the multiple heat exchangers 2 arranged in parallel greatly improve the heat exchange efficiency; the cooling return pipeline includes a coolant output pipeline 3 connected to the first liquid outlet of the heat exchanger 2, and a coolant return pipeline 4 connected to the coolant output pipeline 3 and the first liquid inlet of the heat exchanger 2; the coolant output pipeline 3 is used to output the coolant after heat exchange and cooling by the heat exchanger 2 to cool the system or other equipment, thereby ensuring that the system is at the optimal operating temperature; the coolant return pipeline 4 is used to transport the coolant after cooling the system or other equipment to the heat exchanger 2 for heat exchange and cooling, thus forming a cooling return pipeline.

[0027] The coolant output pipeline 3 is equipped with a first flow regulating valve 5 and a first temperature sensor 6; the coolant return pipeline 4 is equipped with a second flow regulating valve 7 and a second temperature sensor 8; the coolant output pipeline 3 is equipped with a first regulating valve 9, which is located upstream of the first flow regulating valve 5.

[0028] The heat exchange return pipeline includes a heat exchange liquid output pipeline 10 connected to the second liquid outlet of the heat exchanger 2, and a heat exchange liquid return pipeline 11 connected to the heat exchange liquid output pipeline 10 via a refrigeration device and connected to the second liquid inlet of the heat exchanger 2. Each heat exchange liquid return pipeline 11 is equipped with a first switching valve 28 located upstream of the second liquid inlet of each heat exchanger 2. A third temperature sensor 12 is installed on the heat exchange liquid output pipeline 10; a fourth temperature sensor 13 is installed on the heat exchange liquid return pipeline 11; and a second regulating valve 14 is installed on the heat exchange liquid return pipeline 11.

[0029] A fifth temperature sensor 15 is installed upstream of the circulating pump 1; a sixth temperature sensor 16 is installed downstream of the heater 19.

[0030] The regulating valves are mainly used to control the stability of liquid output and input, and can also function as on / off valves. The three first regulating valves 9 can independently control the three parallel coolant output lines 3. That is, during low-power operation, one or two coolant output lines 3 can be opened to meet the temperature requirements; during high-power operation, all coolant output lines 3 can be opened to meet the high-flow cooling demand. The first flow regulating valve 5 allows for precise flow adjustment, and temperature sensors monitor the output and input temperatures and feed them back to the control system. The second flow regulating valve 7 adjusts the reflux ratio based on temperature sensor data, forming a closed-loop control. This avoids large temperature fluctuations in the system, ensuring the system operates at the optimal temperature, thereby guaranteeing the accuracy of the test data for the hydrogen fuel cell system obtained from the test platform. Real-time closed-loop regulation of coolant flow and temperature, along with a pressure stabilizing device to ensure the stability of the regulation process, and the coordination between the refrigeration equipment and the heat exchange loop, improves the overall heat exchange efficiency, providing a reliable thermal environment for high-precision simulation testing.

[0031] Furthermore, in this embodiment, a branch 17 is provided between the coolant output pipeline 3 and the coolant return pipeline 4, allowing the coolant to flow from the coolant output pipeline 3 to the coolant return pipeline 4. A valve 18 is installed on the branch 17, which can be a switch valve or a third flow regulating valve. Through real-time feedback from a temperature sensor, when the coolant parameters do not meet the fuel cell stack requirements, mechanical circulation adjustment can be performed through this branch 17 until the coolant parameters stabilize before being fed back into the fuel cell stack.

[0032] In this embodiment, a heater 19 is provided between the circulating pump 1 and the heat exchanger 2 to heat the coolant, ensuring that the system operates at its optimal temperature during startup in low-temperature environments. Pressure transmitters 20 are installed on the coolant output line 3, the coolant return line 4, and the heat exchanger return line 11 to monitor the pressure difference before and after the pump. A filter 21 is installed upstream of the circulating pump 1 to prevent foreign objects from damaging the heat exchanger 2.

[0033] Furthermore, a flow meter 22 is installed on the coolant return pipeline 4 to monitor the flow rate in real time, preventing the pump from running dry and the heat exchanger from burning out. A closed immersion tank 23 is also installed upstream of the circulating pump 1, allowing the equipment to be immersed in the immersion tank 23 for cooling. The immersion tank 23 is equipped with an inlet pipeline 24, on which a second switch valve 25 is installed to replenish the coolant. A drain pipeline 26 is installed downstream of the immersion tank 23, which can be opened to drain the system water during maintenance of the circulating pipeline or for winter freeze protection.

[0034] Furthermore, the immersion tank 23 is connected to a purging circuit 27, which allows the residual working fluid in the pipeline to be swept back into the immersion tank 23 using clean gas (nitrogen or dry compressed air), facilitating cleaning.

[0035] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A thermal management system for a hydrogen fuel cell system test platform, comprising a circulation pump (1); characterized in that, It also includes multiple heat exchangers (2) arranged in parallel downstream of the circulating pump (1); a cooling return pipeline connected to the heat exchanger (2); and a heat exchange return pipeline connected to the heat exchanger (2); The cooling return pipeline includes a cooling liquid output pipeline (3) connected to the first outlet of the heat exchanger (2), and a cooling liquid return pipeline (4) connected to the cooling liquid output pipeline (3) and to the first inlet of the heat exchanger (2); a first flow regulating valve (5) and a first temperature sensor (6) are provided on the cooling liquid output pipeline (3); a second flow regulating valve (7) and a second temperature sensor (8) are provided on the cooling liquid return pipeline (4); the cooling liquid output pipeline (3) The heat exchanger (2) is provided with a first regulating valve (9) and is located upstream of the first flow regulating valve (5); the heat exchanger return pipeline includes a heat exchange liquid output pipeline (10) connected to the second liquid outlet of the heat exchanger (2) and a heat exchange liquid return pipeline (11) connected to the heat exchange liquid output pipeline (10) through a refrigeration device and connected to the second liquid inlet of the heat exchanger (2). A first switching valve (28) is provided on the heat exchange liquid return pipeline (11) located upstream of the second liquid inlet of each heat exchanger (2).

2. The thermal management system for a hydrogen fuel cell system test platform according to claim 1, characterized in that, A branch (17) is provided between the coolant output pipe (3) and the coolant return pipe (4), which flows from the coolant output pipe (3) to the coolant return pipe (4), and a valve (18) is provided on the branch (17).

3. The thermal management system for a hydrogen fuel cell system test platform according to claim 1 or 2, characterized in that, A heater (19) is provided between the circulating pump (1) and the heat exchanger (2).

4. The thermal management system for a hydrogen fuel cell system test platform according to claim 1 or 2, characterized in that, A flow meter (22) is installed on the coolant return pipe (4).

5. The thermal management system for a hydrogen fuel cell system test platform according to claim 1 or 2, characterized in that, A third temperature sensor (12) is installed on the heat exchange fluid output pipeline (10); a fourth temperature sensor (13) is installed on the heat exchange fluid return pipeline (11); and a second regulating valve (14) is installed on the heat exchange fluid return pipeline (11).

6. The thermal management system for a hydrogen fuel cell system test platform according to claim 1 or 2, characterized in that, Pressure transmitters (20) are installed on the coolant output pipeline (3), the coolant return pipeline (4), and the heat exchanger return pipeline (11).

7. The thermal management system for a hydrogen fuel cell system test platform according to claim 1 or 2, characterized in that, A filter (21) is installed upstream of the circulating pump (1).

8. The thermal management system for a hydrogen fuel cell system test platform according to claim 3, characterized in that, A fifth temperature sensor (15) is provided upstream of the circulating pump (1); a sixth temperature sensor (16) is provided downstream of the heater (19).

9. The thermal management system for a hydrogen fuel cell system test platform according to claim 1 or 2, characterized in that, An enclosed immersion tank (23) is provided upstream of the circulating pump (1); the immersion tank (23) is provided with an inlet pipe (24), and a second switch valve (25) is provided on the inlet pipe (24); a drain pipe (26) is provided downstream of the immersion tank (23).

10. The thermal management system for a hydrogen fuel cell system test platform according to claim 9, characterized in that, The immersion tank (23) is connected to a purging circuit (27).

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