Thermal management system and fuel cell engine with same

Abstract

The utility model provides a thermal management system and a fuel cell engine with the same. The main heat exchange loop comprises a filtering device, a water pump and an electric pile structure which are connected in sequence; the intercooling loop is connected with the electric pile structure in parallel, and the intercooling loop comprises a heating device and an intercooler which are connected in sequence; the outlet loop comprises a first pipeline and a three-way valve arranged on the first pipeline, a liquid inlet of the three-way valve is communicated with a cooling liquid outlet of the electric pile structure, and a liquid outlet of the three-way valve is communicated with the filtering device; the branch heat exchange loop comprises a second pipeline and a heat exchanger arranged on the second pipeline, the inlet end of the second pipeline is communicated with the cooling liquid outlet, and the outlet end of the second pipeline is communicated with the filtering device; the filtering device is communicated with an outlet of a radiator of the fuel cell engine, and a liquid supplementing opening of the filtering device is communicated with an expansion water tank of the fuel cell engine. The thermal management system solves the problems that the thermal management system in the prior art is large in overall size and large in maintenance difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell engines, and in particular to a thermal management system and a fuel cell engine having the same. Background Art

[0002] Currently, the thermal management system of a fuel cell engine maintains the temperature of the fuel cell stack and its auxiliary components within a certain range through a cooling circuit. Simultaneously, the intercooler ensures that the air intake temperature on the stack meets the required level, thereby ensuring normal and efficient system operation. Therefore, the thermal management system plays a crucial role in the proper operation and lifespan of a fuel cell engine, and is one of the core technologies in the integrated design and development of fuel cell engines.

[0003] However, in the prior art, multiple pipelines are usually used in the thermal management system to process the coolant, which not only increases the difficulty of maintaining the thermal management system, but also causes the overall size of the thermal management system to be larger. Utility Model Content

[0004] The main purpose of the utility model is to provide a thermal management system and a fuel cell engine having the same, so as to solve the problems of the thermal management system in the prior art being large in overall volume and difficult to maintain.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a thermal management system is provided, comprising: a main heat exchange circuit, comprising a filtering device, a water pump and a fuel cell stack structure connected in sequence; an intercooling circuit, arranged in parallel with the fuel cell stack structure, the intercooling circuit comprising a heating device and an intercooler connected in sequence; an outlet circuit, comprising a first pipeline and a three-way valve arranged on the first pipeline, the liquid inlet of the three-way valve is connected to the coolant outlet of the fuel cell stack structure, and one liquid outlet of the three-way valve is connected to the filtering device; a branch heat exchange circuit, comprising a second pipeline and a heat exchanger arranged on the second pipeline, the inlet end of the second pipeline is connected to the coolant outlet, and the outlet end of the second pipeline is connected to the filtering device; wherein the filtering device is connected to the outlet of the radiator of the fuel cell engine, and the liquid replenishing port of the filtering device is connected to the expansion water tank of the fuel cell engine.

[0006] Furthermore, the heating device is a PTC heater.

[0007] Furthermore, the heat exchanger is a hydrogen heat exchanger, and the flow direction of the coolant in the second pipeline is arranged opposite to the flow direction of the hydrogen in the hydrogen heat exchanger.

[0008] Furthermore, the water pump is connected to the coolant inlet of the fuel cell stack structure.

[0009] Furthermore, the exhaust port of the fuel cell stack structure is connected to the expansion water tank of the fuel cell engine.

[0010] Furthermore, the main heat exchange circuit also includes a third pipeline, and the water pump is arranged on the third pipeline; the filtering device includes: a casing, having multiple coolant inlets, a coolant discharge outlet and a liquid filling port, at least one coolant inlet is connected to a liquid outlet of the three-way valve, at least one coolant inlet is connected to the outlet end of the second pipeline, at least one coolant inlet is connected to the coolant outlet of the radiator, and the coolant discharge outlet is connected to the third pipeline; a filter core is arranged in the casing.

[0011] Furthermore, the multiple cooling liquid inlets include a first cooling liquid inlet, a second cooling liquid inlet and a third cooling liquid inlet, and the casing includes: a casing body; a first channel, a first end of the first channel is the first cooling liquid inlet, the second end of the first channel is connected to the inner cavity of the casing body, and the first cooling liquid inlet is connected to the outlet of the radiator; a second channel, a first end of the second channel is the cooling liquid discharge outlet, and the second end of the second channel is connected to the inner cavity of the casing body; a third channel, a first end of the third channel is the second cooling liquid inlet, the second end of the third channel is connected to the inner cavity of the casing body, and the second cooling liquid inlet is connected to a liquid outlet of the three-way valve; a fourth channel is arranged on the third channel, a first end of the fourth channel is the third cooling liquid inlet, the second end of the fourth channel is connected to the third channel, and the third cooling liquid inlet is connected to the outlet end of the second pipeline; a fifth channel is arranged on the third channel, a first end of the fifth channel is the fluid replenishment port, and the second end of the fifth channel is connected to the third channel.

[0012] Furthermore, the first channel and the second channel are respectively located on two sides of the housing body, and the third channel is located between the first channel and the second channel.

[0013] Furthermore, the casing body has a drainage hole, which is located at the bottom of the casing body. The filtering device also includes: a drain valve, which is arranged at the drainage hole to control the on-off state of the drainage hole.

[0014] According to another aspect of the present invention, a fuel cell engine is provided, comprising the above-mentioned thermal management system.

[0015] Applying the technical solution of the present invention, the thermal management system includes a main heat exchange circuit, an intercooling circuit, an outlet circuit and a branch heat exchange circuit. Among them, the main heat exchange circuit includes a filter device, a water pump and a stack structure connected in sequence. The intercooling circuit is arranged in parallel with the stack structure, and the intercooling circuit includes a heating device and an intercooler connected in sequence. The outlet circuit includes a first pipeline and a three-way valve arranged on the first pipeline, the liquid inlet of the three-way valve is connected to the coolant outlet of the stack structure, and one liquid outlet of the three-way valve is connected to the filter device. The branch heat exchange circuit includes a second pipeline and a heat exchanger arranged on the second pipeline, the inlet end of the second pipeline is connected to the coolant outlet, and the outlet end of the second pipeline is connected to the filter device. Among them, the filter device is connected to the outlet of the radiator of the fuel cell engine, and the refill port of the filter device is connected to the expansion water tank of the fuel cell engine. In this way, the filter device is connected to the outlet of the radiator of the fuel cell engine, one liquid outlet of the three-way valve and the outlet end of the second pipeline, and the liquid replenishing port of the filter device is connected to the expansion water tank of the fuel cell engine to realize the integrated design of the filter device, that is, the filter device can be connected to the outlets of multiple components for coolant interaction to reduce the number of pipelines, thereby solving the problem of large overall volume and difficult maintenance of the thermal management system in the prior art, reducing the overall occupied volume of the thermal management system, and reducing the maintenance difficulty of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of an embodiment of a thermal management system according to the present utility model is shown;

[0018] Figure 2 Shown Figure 1 Schematic diagram of the three-dimensional structure of the casing of the filtering device of the thermal management system.

[0019] The above drawings include the following reference numerals:

[0020] 10. Main heat exchange circuit; 20. Filter device; 21. Casing; 211. Coolant discharge port; 212. Fluid filling port; 213. First coolant inlet; 214. Second coolant inlet; 215. Third coolant inlet; 216. Casing body; 217. First channel; 218. Second channel; 219. Third channel; 2110. Fourth channel; 2111. Fifth channel; 30. Water pump; 40. Stack structure; 41. Coolant outlet; 42. Coolant inlet; 43. Exhaust port; 50. Heating device; 60. Intercooler; 70. First pipeline; 80. Three-way valve; 90. Second pipeline; 100. Heat exchanger; 110. Radiator; 120. Expansion tank; 140. Third pipeline. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0023] In the present invention, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0024] In order to solve the problems of large overall volume and high maintenance difficulty of thermal management systems in the prior art, the present application provides a thermal management system and a fuel cell engine having the same.

[0025] like Figure 1 and Figure 2As shown, the thermal management system includes a main heat exchange circuit 10, an intercooling circuit, an outlet circuit, and a branch heat exchange circuit. The main heat exchange circuit 10 includes a filter device 20, a water pump 30, and a fuel cell stack structure 40 connected in sequence. The intercooling circuit is arranged in parallel with the fuel cell stack structure 40 and includes a heating device 50 and an intercooler 60 connected in sequence. The outlet circuit includes a first pipeline 70 and a three-way valve 80 arranged on the first pipeline 70. The liquid inlet of the three-way valve 80 is connected to the coolant outlet 41 of the fuel cell stack structure 40, and one of the liquid outlets of the three-way valve 80 is connected to the filter device 20. The branch heat exchange circuit includes a second pipeline 90 and a heat exchanger 100 arranged on the second pipeline 90. The inlet end of the second pipeline 90 is connected to the coolant outlet 41, and the outlet end of the second pipeline 90 is connected to the filter device 20. The filter device 20 is connected to the outlet of the fuel cell engine radiator 110, and the liquid replenishment port 212 of the filter device 20 is connected to the expansion tank 120 of the fuel cell engine.

[0026] By applying the technical solution of this embodiment, the filter device 20 is connected to the outlet of the radiator 110 of the fuel cell engine, one liquid outlet of the three-way valve 80 and the outlet end of the second pipeline 90, and the liquid replenishing port 212 of the filter device 20 is connected to the expansion water tank 120 of the fuel cell engine to realize the integrated design of the filter device 20, that is, the filter device 20 can be connected to the outlets of multiple components for coolant interaction, so as to reduce the number of pipelines, thereby solving the problem of large overall volume and high maintenance difficulty of the thermal management system in the prior art, reducing the overall occupied volume of the thermal management system, and reducing the maintenance difficulty of the staff.

[0027] In this embodiment, the coolant is diverted from the coolant outlet 41 of the fuel cell stack structure 40 to the heat exchanger 100 to ensure the cooling effect of the coolant on the hydrogen in the heat exchanger 100; the coolant is diverted from the coolant inlet of the fuel cell stack structure 40 to the intercooler 60 to ensure the humidifier inlet temperature.

[0028] In this embodiment, the flow direction of the air in the intercooler 60 is opposite to the flow direction of the hydrogen in the intercooling circuit to improve the heat dissipation effect.

[0029] In this embodiment, the heating device 50 is a PTC heater. Thus, the above arrangement makes the structure of the heating device 50 simpler, easier to manufacture and implement, and reduces the manufacturing cost and difficulty of the heating device 50.

[0030] In this embodiment, the heat exchanger 100 is a hydrogen heat exchanger, and the flow direction of the coolant in the second pipe 90 is opposite to the flow direction of the hydrogen in the hydrogen heat exchanger. In this way, by having the coolant flow direction opposite to the flow direction of the hydrogen in the hydrogen heat exchanger, a better heating effect is achieved.

[0031] In this embodiment, the hydrogen heat exchanger takes water from the coolant outlet 41 of the fuel cell stack structure 40 to ensure that the heating temperature is sufficient.

[0032] like Figure 1 As shown, the water pump 30 is connected to the coolant inlet 42 of the stack structure 40. Thus, in the main heat exchange loop 10, the coolant discharged from the outlet of the radiator 110 passes through the filter device 20 and the water pump 30 before entering the coolant inlet 42. By placing the water pump 30 in front, the pressure difference requirement for the hydrogen-water countercurrent is met.

[0033] like Figure 1 As shown, the exhaust port 43 of the fuel cell stack structure 40 is in communication with the expansion water tank 120 of the fuel cell engine.

[0034] Optionally, the exhaust pipe of the radiator 110 is connected to the expansion water tank 120 , and the deionization tank is connected in series to the exhaust pipe of the radiator 110 .

[0035] like Figure 1 As shown, the main heat exchange circuit 10 also includes a third pipeline 140, and the water pump 30 is arranged on the third pipeline 140. The filter device 20 includes a housing 21 and a filter core. The housing 21 has multiple coolant inlets, a coolant outlet 211, and a liquid replenishing port 212. At least one coolant inlet is connected to a liquid outlet of the three-way valve 80, at least one coolant inlet is connected to the outlet end of the second pipeline 90, and at least one coolant inlet is connected to the coolant outlet of the radiator 110. The coolant outlet 211 is connected to the third pipeline 140. The filter core is arranged in the housing 21. In this way, the above-mentioned arrangement improves the integrated reliability of the filter device 20 to ensure that the filter device 20 can operate normally.

[0036] like Figure 2As shown, the multiple coolant inlets include a first coolant inlet 213, a second coolant inlet 214, and a third coolant inlet 215. The housing 21 includes a housing body 216, a first channel 217, a second channel 218, a third channel 219, a fourth channel 2110, and a fifth channel 2111. The first end of the first channel 217 serves as the first coolant inlet 213, and the second end of the first channel 217 communicates with the inner cavity of the housing body 216. The first coolant inlet 213 communicates with the outlet of the radiator 110. The first end of the second channel 218 serves as the coolant outlet 211, and the second end of the second channel 218 communicates with the inner cavity of the housing body 216. The first end of the third channel 219 serves as the second coolant inlet 214, and the second end of the third channel 219 communicates with the inner cavity of the housing body 216. The second coolant inlet 214 communicates with an outlet of the three-way valve 80. The fourth channel 2110 is disposed on the third channel 219. The first end of the fourth channel 2110 serves as the third coolant inlet 215, and the second end of the fourth channel 2110 communicates with the third channel 219. The third coolant inlet 215 communicates with the outlet of the second pipeline 90. A fifth channel 2111 is disposed on the third channel 219. The first end of the fifth channel 2111 serves as the fluid inlet 212, and the second end of the fifth channel 2111 communicates with the third channel 219. This arrangement further enhances the integrated reliability of the filter device 20 and simplifies the structure of the housing 21, making it easier to manufacture and implement, thereby reducing the cost and difficulty of manufacturing the housing 21.

[0037] In this embodiment, the structure of the filter core can be reasonably designed to filter the coolant at a specific inlet.

[0038] In this embodiment, the filter device 20 is detachable. Specifically, the housing body 216 and the first channel 217 are detachable and can be connected by bolts to facilitate filter replacement.

[0039] like Figure 2 As shown, the first channel 217 and the second channel 218 are respectively located on both sides of the housing body 216, and the third channel 219 is located between the first channel 217 and the second channel 218. In this way, the above arrangement makes the arrangement positions of the first channel 217, the second channel 218 and the third channel 219 more compact, further improving the integration level of the filter device 20.

[0040] In this embodiment, the fourth channel 2110 and the fifth channel 2111 are arranged at intervals along the circumference of the third channel 219 .

[0041] Optionally, the housing body 216 has a drain hole located at the bottom of the housing body 216, and the filter device 20 further includes a drain valve. The drain valve is disposed at the drain hole to control the on / off state of the drain hole. Thus, providing the drain valve at the lowest point of the housing body 216 allows for both coolant discharge and coolant refill.

[0042] In this embodiment, the filter device 20 is a particle filter.

[0043] Optionally, the thermal management system also includes an electronic control unit, which controls the flow and temperature of the thermal management system by monitoring the temperature of the coolant entering and leaving the stack to adjust the three-way valve opening, the duty cycle and number of operations of the radiator fan, and the speed of the water pump.

[0044] The present application also provides a fuel cell engine (not shown) comprising the above-mentioned thermal management system.

[0045] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0046] The thermal management system includes a main heat exchange circuit, an intercooling circuit, an outlet circuit and a branch heat exchange circuit. The main heat exchange circuit includes a filter device, a water pump and a stack structure connected in sequence. The intercooling circuit is arranged in parallel with the stack structure, and the intercooling circuit includes a heating device and an intercooler connected in sequence. The outlet circuit includes a first pipeline and a three-way valve arranged on the first pipeline, the liquid inlet of the three-way valve is connected to the coolant outlet of the stack structure, and one of the liquid outlets of the three-way valve is connected to the filter device. The branch heat exchange circuit includes a second pipeline and a heat exchanger arranged on the second pipeline, the inlet end of the second pipeline is connected to the coolant outlet, and the outlet end of the second pipeline is connected to the filter device. The filter device is connected to the outlet of the radiator of the fuel cell engine, and the refill port of the filter device is connected to the expansion water tank of the fuel cell engine. In this way, the filter device is connected to the outlet of the radiator of the fuel cell engine, one liquid outlet of the three-way valve and the outlet end of the second pipeline, and the liquid replenishing port of the filter device is connected to the expansion water tank of the fuel cell engine to realize the integrated design of the filter device, that is, the filter device can be connected to the outlets of multiple components for coolant interaction to reduce the number of pipelines, thereby solving the problem of large overall volume and difficult maintenance of the thermal management system in the prior art, reducing the overall occupied volume of the thermal management system, and reducing the maintenance difficulty of the staff.

[0047] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0049] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A thermal management system, characterized in that: include: A main heat exchange circuit (10) includes a filter device (20), a water pump (30), and a stack structure (40) connected in sequence; An intercooling circuit is arranged in parallel with the stack structure (40), and the intercooling circuit includes a heating device (50) and an intercooler (60) connected in sequence; An outlet circuit comprises a first pipeline (70) and a three-way valve (80) arranged on the first pipeline (70), wherein a liquid inlet of the three-way valve (80) is communicated with a coolant outlet (41) of the stack structure (40), and a liquid outlet of the three-way valve (80) is communicated with the filter device (20); a branch heat exchange circuit, comprising a second pipeline (90) and a heat exchanger (100) arranged on the second pipeline (90), wherein the inlet end of the second pipeline (90) is connected to the coolant outlet (41), and the outlet end of the second pipeline (90) is connected to the filter device (20); The filter device (20) is connected to the outlet of the radiator (110) of the fuel cell engine, and the liquid replenishing port (212) of the filter device (20) is connected to the expansion water tank (120) of the fuel cell engine.

2. The thermal management system according to claim 1, characterized in that The heating device (50) is a PTC heater.

3. The thermal management system according to claim 1, wherein: The heat exchanger (100) is a hydrogen heat exchanger, and the flow direction of the coolant in the second pipeline (90) is arranged opposite to the flow direction of the hydrogen in the hydrogen heat exchanger.

4. The thermal management system according to claim 1, wherein: The water pump (30) is in communication with a coolant inlet (42) of the fuel cell stack structure (40).

5. The thermal management system according to claim 1, wherein: The exhaust port (43) of the fuel cell stack structure (40) is in communication with the expansion water tank (120) of the fuel cell engine.

6. The thermal management system according to claim 1, wherein: The main heat exchange circuit (10) further includes a third pipeline (140), and the water pump (30) is arranged on the third pipeline (140); the filtering device (20) includes: The housing (21) has a plurality of coolant inlets, a coolant outlet (211) and the liquid replenishing port (212), at least one of the coolant inlets is connected to a liquid outlet of the three-way valve (80), at least one of the coolant inlets is connected to the outlet end of the second pipeline (90), at least one of the coolant inlets is connected to the coolant outlet of the radiator (110), and the coolant outlet (211) is connected to the third pipeline (140); The filter core is arranged in the casing (21).

7. The thermal management system according to claim 6, characterized in that: The plurality of coolant inlets include a first coolant inlet (213), a second coolant inlet (214), and a third coolant inlet (215), and the housing (21) includes: Housing body (216); a first channel (217), wherein a first end of the first channel (217) is the first coolant inlet (213), a second end of the first channel (217) is in communication with the inner cavity of the housing body (216), and the first coolant inlet (213) is in communication with the outlet of the radiator (110); a second channel (218), wherein a first end of the second channel (218) is the coolant outlet (211), and a second end of the second channel (218) is in communication with the inner cavity of the housing body (216); a third channel (219), wherein a first end of the third channel (219) is the second coolant inlet (214), a second end of the third channel (219) is in communication with the inner cavity of the housing body (216), and the second coolant inlet (214) is in communication with a liquid outlet of the three-way valve (80); a fourth channel (2110) disposed on the third channel (219), wherein a first end of the fourth channel (2110) is the third coolant inlet (215), a second end of the fourth channel (2110) is in communication with the third channel (219), and the third coolant inlet (215) is in communication with the outlet end of the second pipeline (90); The fifth channel (2111) is provided on the third channel (219), the first end of the fifth channel (2111) is the fluid infusion port (212), and the second end of the fifth channel (2111) is connected to the third channel (219).

8. The thermal management system according to claim 7, characterized in that: The first channel (217) and the second channel (218) are respectively located on two sides of the housing body (216), and the third channel (219) is located between the first channel (217) and the second channel (218).

9. The thermal management system according to claim 7, wherein: The housing body (216) has a drainage hole, and the drainage hole is located at the bottom of the housing body (216). The filtering device (20) further includes: A drain valve is provided at the drain hole to control the on / off state of the drain hole.

10. A fuel cell engine, characterized in that: A thermal management system comprising the thermal management system according to any one of claims 1 to 9.

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