Electric pile heat dissipation system, control method and vehicle

Abstract

The invention discloses a galvanic pile heat dissipation system, a control method and a vehicle, the galvanic pile heat dissipation system comprises a galvanic pile heat dissipation assembly, a liquid cooling cavity is formed in a radiator, the liquid cooling cavity is connected in series in a circulating water path, a heat exchanger is installed in the liquid cooling cavity, and a heat exchange flow path is formed in the heat exchanger; the first side water cavity is communicated between the waste water path and a water inlet of the heat exchange flow path and is provided with a first water valve and a first liquid level sensor, and the second side water cavity is communicated with a water outlet of the heat exchange flow path and is provided with a second water valve and a second liquid level sensor; the second temperature sensor is used for detecting the environment temperature, and the controller is suitable for controlling the first water valve and the second water valve according to the detection result. According to the galvanic pile heat dissipation system, the heat dissipation effect of the galvanic pile heat dissipation assembly is improved, waste water in the heat exchanger is used for cooling the cooling liquid, energy can be saved, and the use cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and in particular to a stack cooling system, a control method and a vehicle. Background Art

[0002] As an important direction of future new energy vehicles, hydrogen fuel cell vehicles have been increasingly valued by major vehicle manufacturers around the world. Mainstream vehicle manufacturers have continuously increased their research on the technology of hydrogen fuel cell vehicles. With the development of hydrogen fuel vehicles, the power of the matched hydrogen fuel engine is getting larger and larger, and the heat dissipation amount also increases synchronously. At present, the cooling systems of hydrogen fuel cell engines in vehicles mostly adopt one or more cooling modules to meet the heat dissipation requirements of hydrogen fuel cells, with poor heat dissipation effect and low energy efficiency, leaving room for improvement. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a stack cooling system with good heat dissipation effect, which can save energy and reduce the use cost.

[0004] The stack cooling system according to an embodiment of the present invention includes: a circulating water circuit, the circulating water circuit is connected to a stack and a first temperature sensor; a stack heat dissipation assembly, the stack heat dissipation assembly includes a radiator and a heat exchanger, a liquid cooling cavity is formed in the radiator, the liquid cooling cavity is connected in series to the circulating water circuit, the heat exchanger is installed in the liquid cooling cavity, and a heat exchange flow path is formed in the heat exchanger; a water collection tank and a waste water circuit, the water collection tank has a first side water cavity and a second side water cavity, the first side water cavity is communicated between the waste water circuit and the water inlet of the heat exchange flow path and is provided with a first water valve and a first liquid level sensor, the second side water cavity is communicated with the water outlet of the heat exchange flow path and is provided with a second water valve and a second liquid level sensor; a second temperature sensor and a controller, the second temperature sensor is used to detect the ambient temperature, and the controller is adapted to control the first water valve and the second water valve respectively according to the detection results of the second temperature sensor, the first liquid level sensor, the second liquid level sensor and the first temperature sensor.

[0005] The stack cooling system according to an embodiment of the present invention improves the heat dissipation effect of the stack heat dissipation assembly by arranging a heat exchanger in the liquid cooling cavity of the radiator and using the waste water in the heat exchanger to cool the coolant. Moreover, using the waste water in the heat exchanger to cool the coolant can save energy and reduce the use cost, with better use effect and wider application range.

[0006] For the stack cooling system according to some embodiments of the present invention, a first water pump is provided between the first side water chamber and the water inlet; and / or, a drain pipe is connected to the outlet end of the second side water chamber, and a second water pump is provided in the drain pipe; wherein, the controller is electrically connected to the first water pump and the second water pump respectively for controlling the opening or closing of the first water pump and the second water pump.

[0007] For the stack cooling system according to some embodiments of the present invention, an atomizing nozzle is provided at the water outlet end of the drain pipe.

[0008] For the stack cooling system according to some embodiments of the present invention, the radiator includes a first water chamber, a main body portion and a second water chamber. The first water chamber and the second water chamber are respectively installed at both ends of the main body portion. The radiator is provided with a coolant inlet and a coolant outlet respectively communicating with the liquid cooling chamber. The coolant inlet is provided in the first water chamber, the coolant outlet is provided in the second water chamber, and the first water chamber and the second water chamber are communicated through a flow channel in the main body portion. The heat exchanger is located in the first water chamber or the second water chamber.

[0009] For the stack cooling system according to some embodiments of the present invention, the heat exchanger is located in the second water chamber, and the distance between the coolant outlet and the water outlet is less than the distance between the coolant outlet and the water inlet.

[0010] For the stack cooling system according to some embodiments of the present invention, the heat exchanger is configured as a column, and the water inlet and the water outlet are respectively provided at both ends of the heat exchanger, and the water outlet is located at one end of the heat exchanger close to the coolant outlet.

[0011] For the stack cooling system according to some embodiments of the present invention, it further includes: a fan, which is disposed opposite to the radiator.

[0012] The present invention also proposes a control method for a stack cooling system.

[0013] For the control method of the stack cooling system according to an embodiment of the present invention, it is applicable to the stack cooling system described in any one of the above, and a first water pump is provided between the first side water chamber and the water inlet. The control method includes:

[0014] Obtain the ambient temperature;

[0015] When the ambient temperature is greater than a first set temperature, obtain the first liquid level of the first side water chamber;

[0016] When the first liquid level is less than a first maximum set liquid level and greater than a first minimum set liquid level, obtain the temperature of the coolant in the circulating water path;

[0017] When the temperature of the coolant is greater than the set opening temperature, control the first water valve and the first water pump to open.

[0018] The control method of the stack cooling system according to some embodiments of the present invention further includes:

[0019] When the ambient temperature is less than or equal to the first set temperature or the first liquid level is greater than the first maximum set liquid level, control both the first water valve and the second water valve to open;

[0020] When the first liquid level is less than the first minimum set liquid level, control the first water pump between the first side water chamber and the water inlet not to work.

[0021] For the control method of the stack cooling system according to some embodiments of the present invention, a second water pump is provided at the outlet end of the second side water chamber, and the control method further includes:

[0022] Obtain the second liquid level of the second side water chamber;

[0023] When the second liquid level is greater than the second maximum set liquid level, control both the first water valve and the second water valve to open;

[0024] When the second liquid level is greater than the second minimum set liquid level, control the second water pump to open.

[0025] The present invention also proposes a vehicle.

[0026] The vehicle according to the embodiment of the present invention is provided with the stack cooling system described in any one of the above.

[0027] The advantages of the control method of the stack cooling system, the vehicle and the above-mentioned stack cooling system over the prior art are the same and will not be elaborated here.

[0028] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0030] Figure 1 is a schematic structural diagram of a stack cooling system according to an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

[0032] Figure 3 is a schematic structural diagram of a radiator according to an embodiment of the present invention;

[0033] Figure 4 is a schematic structural view of a water collection tank according to an embodiment of the present invention;

[0034] Figure 5 is a flowchart of a control method for a fuel cell stack cooling system according to an embodiment of the present invention Figure 1 ;

[0035] Figure 6 is a flowchart of a control method for a fuel cell stack cooling system according to an embodiment of the present invention Figure 2 ;

[0036] Figure 7 is a flowchart of a control method for a fuel cell stack cooling system according to an embodiment of the present invention Figure 3 ;

[0037] Figure 8 is a flowchart of a control method for a fuel cell stack cooling system according to an embodiment of the present invention Figure 4 .

[0038] Reference numerals:

[0039] Fuel cell stack cooling system 100,

[0040] Radiator 1, first water chamber 11, coolant inlet 111, main body 12, second water chamber 13, coolant outlet 131,

[0041] Heat exchanger 2, water inlet 21, water outlet 22,

[0042] Circulation water path 3, first temperature sensor 31, waste water path 4, fuel cell stack 5, waste water outlet 51, water collection tank 6, first side water chamber 61, first water valve 611, first liquid level sensor 612, second side water chamber 62, second water valve 621, second liquid level sensor 622, fan 7, first water pump 8, drain pipe 9, atomizing nozzle 91, second water pump 92. Detailed description of the specific embodiments

[0043] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] Next, refer to Figures 1-8 to describe the stack cooling system 100 according to an embodiment of the present invention, which has good heat dissipation effect, can save energy, and reduce the use cost.

[0047] As Figures 1-8 shown, the stack cooling system 100 according to an embodiment of the present invention includes: a circulation water path 3, a stack heat dissipation component, a water collection tank 6, a waste water path 4, a second temperature sensor, and a controller.

[0048] The circulation water path 3 is connected to a stack 5 and a first temperature sensor 31. The stack heat dissipation component includes a radiator 1 and a heat exchanger 2. A liquid cooling cavity is formed in the radiator 1, and the liquid cooling cavity is connected in series to the circulation water path 3. The heat exchanger 2 is installed in the liquid cooling cavity, and a heat exchange flow path is formed in the heat exchanger 2. The water collection tank 6 has a first side water cavity 61 and a second side water cavity 62. The first side water cavity 61 is communicated between the waste water path 4 and the water inlet 21 of the heat exchange flow path and is provided with a first water valve 611 and a first liquid level sensor 612. The second side water cavity 62 is communicated with the water outlet 22 of the heat exchange flow path and is provided with a second water valve 621 and a second liquid level sensor 622. The second temperature sensor is used to detect the ambient temperature, and the controller is adapted to control the first water valve 611 and the second water valve 621 respectively according to the detection results of the second temperature sensor, the first liquid level sensor 612, the second liquid level sensor 622, and the first temperature sensor 31.

[0049] Specifically, the fuel cell cooling assembly is provided with a radiator 1 and a heat exchanger 2. The radiator 1 is used to cool the fuel cell 5. A liquid cooling chamber is formed inside the radiator 1, and the coolant can flow through the liquid cooling chamber, thereby achieving the cooling effect. Moreover, the liquid cooling chamber is connected in series to the circulation water path 3, that is, the coolant can enter the liquid cooling chamber through the circulation water path 3, flow through the liquid cooling chamber and then be discharged into the circulation water path 3. The circulation water path 3 is connected to the fuel cell 5. After absorbing heat in the fuel cell 5, the coolant enters the radiator 1 through the circulation water path 3, cools down in the liquid cooling chamber of the radiator 1 and then can continue to flow into the circulation water path 3 to cool the fuel cell 5 through the circulation water path 3, ensuring the stable operation of the fuel cell 5.

[0050] Furthermore, the heat exchanger 2 is installed in the liquid cooling chamber. The heat exchanger 2 can exchange heat with the coolant in the liquid cooling chamber to further reduce the temperature of the coolant and ensure the cooling effect of the coolant on the fuel cell 5. A heat exchange flow path is formed inside the heat exchanger 2. The heat exchange flow path is provided with a water inlet 21 and a water outlet 22. And the fuel cell cooling system 100 is provided with a water collection tank 6. The water collection tank 6 is provided with a first side water chamber 61 and a second side water chamber 62. The first side water chamber 61 is communicated between the water inlet 21 and the waste water path 4 of the fuel cell cooling system 100. The second side water chamber 62 is communicated with the water outlet 22. That is, the water inlet 21 and the waste water path 4 of the fuel cell cooling system 100 are communicated through the first side water chamber 61. The waste water generated by the reaction of the fuel cell 5 flows through the waste water path 4 into the first side water chamber 61, and then flows through the first side water chamber 61 into the water inlet 21, and enters the heat exchanger 2 through the water inlet 21. After the heat exchanger 2 exchanges heat with the coolant in the liquid cooling chamber, it is discharged into the second side water chamber 62 through the water outlet 22, thereby recycling the waste water generated by the reaction of the fuel cell 5. While improving the heat dissipation effect of the radiator 1, it can save energy, reduce the use cost of the radiator 1. And the first side water chamber 61 is provided with a first water valve 611, and the second side water chamber 62 is provided with a second water valve 621, which can respectively control the opening and closing of the first side water chamber 61 and the second side water chamber 62 when needed to meet more usage requirements.

[0051] Moreover, the fuel cell stack cooling system 100 is provided with a second temperature sensor and a controller. The second temperature sensor can be set as an ambient temperature sensor, that is, the second temperature sensor can be used to detect the ambient temperature of the fuel cell stack cooling system 100. The first side water chamber 61 is provided with a first liquid level sensor 612, and the first liquid level sensor 612 can be used to detect the liquid level height in the first side water chamber 61. The second side water chamber 62 is provided with a second liquid level sensor 622, and the second liquid level sensor 622 can be used to detect the liquid level height in the second side water chamber 62. The circulating water path 3 is further provided with a first temperature sensor 31. The first temperature sensor 31 can be set as a coolant temperature sensor and can be used to detect the temperature of the coolant in the circulating water path 3. The controller is electrically connected to the first water valve 611 and the second water valve. The controller can control the first water valve 611 and the second water valve 621 respectively according to the detection results of the second temperature sensor, the first liquid level sensor 612, the second liquid level sensor 622 and the first temperature sensor 31, that is, the controller can open or close the first water valve 611 and the second water valve 621 respectively according to the detection results, and further can control the opening state of the water collecting tank 6 according to different requirements, with better use effect and extended service life.

[0052] Among them, the heat exchanger 2 is integrally installed in the liquid cooling cavity of the radiator 1, so that the heat exchanger 2 does not need to occupy too much installation space outside the radiator 1, reducing the overall space occupation of the fuel cell stack cooling component, realizing the compact integrated setting of the fuel cell stack cooling component, and being more convenient to install.

[0053] According to the fuel cell stack cooling system 100 of the embodiment of the present invention, by arranging the heat exchanger 2 in the liquid cooling cavity of the radiator 1, the waste water in the heat exchanger 2 is used to cool the coolant, thereby improving the heat dissipation effect of the fuel cell stack cooling component, and using the waste water in the heat exchanger 2 to cool the coolant can save energy, reduce the use cost, have better use effect and wider application range.

[0054] In some embodiments, a first water pump 8 is provided between the first side water chamber 61 and the water inlet 21; and / or, the outlet end of the second side water chamber 62 is connected to a drainage pipeline 9, and a second water pump 92 is provided in the drainage pipeline 9, that is, a first water pump 8 is provided between the first side water chamber 61 and the water inlet 21. At the same time, the outlet end of the second side water chamber 62 is connected to a drainage pipeline 9, and a second water pump 92 is provided in the drainage pipeline 9. It is also possible that only a first water pump 8 is provided between the first side water chamber 61 and the water inlet 21, or only the outlet end of the second side water chamber 62 is connected to a drainage pipeline 9, and a second water pump 92 is provided in the drainage pipeline 9. Among them, the controller is electrically connected to the first water pump 8 and the second water pump 92 respectively for controlling the opening or closing of the first water pump 8 and the second water pump 92.

[0055] Specifically, such as Figure 1As shown, in this embodiment, a first water pump 8 is provided between the first side water chamber 61 and the water inlet 21, and a drain pipe 9 is connected to the outlet end of the second side water chamber 62. A second water pump 92 is provided in the drain pipe 9. The first water pump 8 is arranged between the first side water chamber 61 and the water inlet 21. When the coolant dissipates heat, the first water valve 611 of the first side water chamber 61 is opened, and then the waste water is discharged into the waste water channel 4, and is transported to the water inlet 21 by the first water pump 8, and then enters the heat exchanger 2 for heat exchange, ensuring that the waste water can flow into the heat exchanger 2 in time and improving the heat exchange effect. At the same time, the outlet end of the second side water chamber 62 is connected to the drain pipe 9, and the waste water in the second side water chamber 62 can be discharged to the outside through the drain pipe 9. The second water pump 92 provided in the drain pipe 9 can accelerate the discharge speed of the waste water, save the drainage time, and improve the drainage efficiency. The controller is electrically connected to the first water pump 8 and the second water pump 92 respectively, and can control the first water pump 8 and the second water pump 92 to be turned on or off according to the detection results of the second temperature sensor, the first liquid level sensor 612, the second liquid level sensor 622 and the first temperature sensor 31, so as to meet the operation requirements of each state of the fuel cell cooling system 100.

[0056] In some embodiments, a spray nozzle 91 is provided at the water outlet end of the drain pipe 9.

[0057] Specifically, as Figure 1 shown, a spray nozzle 91 is provided at the water outlet end of the drain pipe 9. The outlet end of the second side water chamber 62 is connected to the drain pipe 9. The waste water in the second side water chamber 62 can be discharged to the second water pump 92 through the drain pipe 9, and a spray nozzle 91 is provided downstream of the second water pump 92. The spray nozzle 91 is provided in multiple numbers. The waste water is pressurized by the second water pump 92 and then transported to the multiple spray nozzles 91, and then can be atomized by the multiple spray nozzles 91 respectively, improving the atomization efficiency. The atomized waste water can be discharged to the outside, avoiding the liquid freezing when the outside temperature is relatively low and causing traffic accidents, etc., and improving the use safety.

[0058] In some embodiments, the radiator 1 includes a first water chamber 11, a main body portion 12 and a second water chamber 13. The first water chamber 11 and the second water chamber 13 are respectively installed at both ends of the main body portion 12. The radiator 1 is provided with a coolant inlet 111 and a coolant outlet 131 respectively communicating with the liquid cooling chamber. The coolant inlet 111 is provided in the first water chamber 11, the coolant outlet 131 is provided in the second water chamber 13, and the first water chamber 11 and the second water chamber 13 are communicated through the flow channel in the main body portion 12. The heat exchanger 2 is located in the first water chamber 11 or the second water chamber 13.

[0059] Specifically, the radiator 1 is provided with a first water chamber 11, a main body portion 12, and a second water chamber 13. The coolant can flow between the first water chamber 11, the main body portion 12, and the second water chamber 13. The first water chamber 11 and the second water chamber 13 are respectively installed at both ends of the main body portion 12, that is, the coolant can flow through the main body portion 12 from the end of the radiator 1 and then flow out from the end of the radiator 1, so as to maximize the heat dissipation area and improve the heat dissipation effect.

[0060] Furthermore, the radiator 1 is provided with a coolant inlet 111 and a coolant outlet 131 respectively communicating with the liquid cooling cavity. The coolant can enter the liquid cooling cavity through the coolant inlet 111, and after flowing in the liquid cooling cavity, it is discharged from the radiator 1 through the coolant outlet 131 communicating with the liquid cooling cavity. The coolant inlet 111 and the coolant outlet 131 are respectively connected to the circulation water path 3 of the fuel cell stack cooling system 100. After absorbing heat in the fuel cell stack 5, the coolant enters the radiator 1 through the coolant inlet 111 connected to the circulation water path 3, and then flows through the coolant outlet 131 to the circulation water path 3, so as to cool the fuel cell stack 5 through the circulation water path 3 and ensure the stable operation of the fuel cell stack 5.

[0061] The first water chamber 11 is provided with a coolant inlet 111, the second water chamber 13 is provided with a coolant outlet 131, and a flow channel is provided in the main body portion 12. The coolant can flow in the flow channel. The coolant enters the first water chamber 11 through the coolant inlet 111, flows through the first water chamber 11 to the flow channel in the main body portion 12, and then dissipates heat. Then it flows through the main body portion 12 to the second water chamber 13. A heat exchanger 2 is provided in the second water chamber 13, and the heat exchanger 2 further exchanges heat with the coolant in the second water chamber 13. Subsequently, the coolant flows through the coolant outlet 131 provided in the second water chamber 13 to the circulation water path 3 to complete the heat dissipation of the coolant.

[0062] In some embodiments, the main body portion 12 is configured as a rectangle, and the coolant inlet 111 and the coolant outlet 131 are diagonally distributed on both sides of the main body portion 12.

[0063] Specifically, such as Figure 3As shown in the figure, the radiator 1 is provided with a main body portion 12. The first water chamber 11 and the second water chamber 13 are arranged at both ends of the radiator 1. The main body portion 12 is set as a rectangle, and the first water chamber 11 and the second water chamber 13 are arranged along the width direction of the main body portion 12. The coolant inlet 111 is arranged in the first water chamber 11, and the coolant outlet 131 is arranged in the second water chamber 13. And the first water chamber 11 and the second water chamber 13 are arranged at both ends of the radiator 1, that is, the coolant inlet 111 and the coolant outlet 131 are arranged on the wide sides of the main body portion 12. At the same time, the coolant inlet 111 and the coolant outlet 131 are diagonally distributed on both sides of the main body portion 12, so that the distance between the coolant inlet 111 and the coolant outlet 131 is the farthest. The coolant enters the first water chamber 11 from the coolant inlet 111 and is discharged from the radiator 1 through the coolant outlet 131 of the second water chamber 13. Setting the distance between the coolant inlet 111 and the coolant outlet 131 to be the largest can extend the flow path length of the coolant in the main body portion 12, and then make the coolant dissipate heat more thoroughly and improve the heat dissipation effect.

[0064] In some embodiments, the heat exchanger 2 is located in the second water chamber 13, and the distance between the coolant outlet 131 and the water outlet 22 is less than the distance between the coolant outlet 131 and the water inlet 21.

[0065] Specifically, as Figure 3 shown, the heat exchanger 2 is arranged in the second water chamber 13, that is, after the coolant flows through the first water chamber 11 to the main body portion 12 for heat dissipation and then enters the second water chamber 13, it exchanges heat with the heat exchanger 2 further to improve the heat exchange effect. And the distance between the coolant outlet 131 and the water outlet 22 is less than the distance between the coolant outlet 131 and the water inlet 21, that is, the distance between the coolant outlet 131 and the water inlet 21 is larger, so that the heat exchange area between the heat exchanger 2 and the coolant is larger, and then the heat exchange effect is improved, so that the temperature of the coolant is as low as possible when it is discharged from the radiator 1 to improve the cooling effect of the coolant.

[0066] In some embodiments, the heat exchanger 2 is configured as a columnar shape, and the water inlet 21 and the water outlet 22 are respectively arranged at both ends of the heat exchanger 2, and the water outlet 22 is located at one end of the heat exchanger 2 close to the coolant outlet 131.

[0067] Specifically, as Figure 2 shown, the heat exchanger 2 is arranged in the second water chamber 13, and the heat exchanger 2 is set as a columnar structure. In this embodiment, the heat exchanger 2 is set as a cylindrical shape. In actual use, it can also be set as other columnar structures. Setting the heat exchanger 2 as a cylindrical shape can make the contact between the heat exchanger 2 and the coolant more uniform, and then make the heat exchange effect between the heat exchanger 2 and the coolant better. And setting the heat exchanger 2 as a cylindrical shape can reduce the resistance of the waste water flowing through the heat exchanger 2 and facilitate the flow of the waste water in the heat exchanger 2.

[0068] Further, the water inlet 21 and the water outlet 22 are arranged at both ends of the heat exchanger 2. Waste water enters the heat exchanger 2 through the water inlet 21, and after heat exchange with the coolant, it is discharged from the heat exchanger 2 through the water outlet 22. The water outlet 22 is arranged at one end of the heat exchanger 2 close to the coolant outlet 131, so that the distance between the coolant outlet 131 and the water inlet 21 is relatively large. As a result, the heat exchange area between the heat exchanger 2 and the coolant is relatively large, improving the heat exchange effect, and making the temperature of the coolant as low as possible when it is discharged from the radiator 1, so as to improve the cooling effect of the coolant.

[0069] In some embodiments, the stack cooling system 100 further includes: a fan 7.

[0070] Specifically, as Figure 1 shown, the fan 7 is arranged opposite to the radiator 1. The stack cooling system 100 is provided with the fan 7, and the fan 7 is arranged opposite to the radiator 1, that is, the fan 7 can dissipate heat from the radiator 1, thereby improving the heat dissipation effect of the coolant. Moreover, the cooled coolant then flows through the circulation water path 3 to the stack 5, so that the temperature of the stack 5 is maintained within the normal range, ensuring safe operation.

[0071] In some embodiments, the coolant outlet 131, the water inlet 21 and the water outlet 22 are all open on the same side of the second water chamber 13.

[0072] Specifically, as Figure 2 shown, the coolant outlet 131, the water inlet 21 and the water outlet 22 are all open on the same side of the second water chamber 13, and the coolant inlet 111 provided in the first water chamber 11 is also arranged on the same side as the coolant outlet 131, the water inlet 21 and the water outlet 22. When the radiator 1 is installed, the pipes can be connected to the radiator 1 from the same side, avoiding situations such as pipe bending, which may cause the coolant waste water, etc. not to flow, resulting in system failures, etc.

[0073] In some embodiments, the first water chamber 11 and the second water chamber 13 are respectively located at the upper and lower ends of the main body portion 12.

[0074] Specifically, as Figure 3 shown, the first water chamber 11 and the second water chamber 13 are arranged at both ends of the main body portion 12, and the first water chamber 11 and the second water chamber 13 are located at the upper and lower ends of the main body portion 12. The first water chamber 11 is arranged at the upper end of the main body portion 12, and the second water chamber 13 is arranged at the lower end of the main body portion 12. The coolant enters the main body portion 12 from the first water chamber 11 and then is discharged from the radiator 1 through the second water chamber 13. Arranging the first water chamber 11 and the second water chamber 13 at the upper and lower ends of the main body portion 12 enables the coolant to flow from the upper end of the main body portion 12 to the lower end of the main body portion 12. Under the action of gravity, it is convenient for the coolant to flow, thereby reducing the flow resistance and saving the energy required for the coolant to circulate in the flow channel, and further saving the use cost.

[0075] The present invention also provides a control method for the stack cooling system 100.

[0076] The control method for the stack cooling system 100 according to the embodiments of the present invention is applicable to the stack cooling system 100 in any of the above, and a first water pump 8 is provided between the first-side water chamber 61 and the water inlet 21. The control method includes, as Figure 6 shown:

[0077] A100. Obtain the ambient temperature;

[0078] A200. When the ambient temperature is greater than the first set temperature, obtain the first liquid level of the first-side water chamber 61;

[0079] A300. When the first liquid level is less than the first maximum set liquid level and greater than the first minimum set liquid level, obtain the temperature of the coolant in the circulation water path 3;

[0080] A400. When the temperature of the coolant is greater than the set opening temperature, control the first water valve 611 and the first water pump 8 to open.

[0081] Specifically, the stack cooling system 100 is provided with a second temperature sensor, which can detect the ambient temperature around the stack cooling system 100, and the ambient temperature is provided with a first set temperature. In this embodiment, the first set temperature is set to 0 °C. A first liquid level sensor 612 is provided in the first-side water chamber 61. When the ambient temperature is greater than the first set temperature, the first liquid level sensor 612 can detect the liquid level height in the first-side water chamber 61, and then obtain the first liquid level in the first-side water chamber 61. The first-side water chamber 61 is provided with a first maximum set liquid level and a first minimum set liquid level. When the first liquid level obtained by the first liquid level sensor 612 is less than the first maximum set liquid level and greater than the first minimum set liquid level, the temperature of the coolant in the circulation water path 3 can be obtained through the first temperature sensor 31 provided in the circulation water path 3.

[0082] Furthermore, the stack 5 is provided with a thermostat, and the thermostat is provided with an opening temperature. When the temperature of the coolant is greater than the opening temperature set by the thermostat, the controller can control the first water valve 611 to open, and can control the first water pump 8 between the first-side water chamber 61 and the water inlet 21 to open, so that the first water pump 8 operates to transport the waste water in the first-side water chamber 61 to the water inlet 21, and then flows to the heat exchanger 2. The heat exchanger 2 exchanges heat with the coolant in the liquid cooling chamber to reduce the temperature of the coolant.

[0083] The control method of the stack cooling system 100 according to an embodiment of the present invention improves the heat dissipation effect of the stack heat dissipation assembly by arranging a heat exchanger 2 in the liquid cooling cavity of the radiator 1 and using the waste water in the heat exchanger 2 to cool the coolant. Moreover, using the waste water in the heat exchanger 2 to cool the coolant can save energy, reduce the usage cost, have a better usage effect, and a wider application range. At the same time, controlling the opening state of the water collecting tank 6 according to different requirements has a better usage effect and prolongs the service life.

[0084] In some embodiments, as Figure 7 shown, the control method of the stack cooling system 100 further includes:

[0085] A500. When the ambient temperature is less than or equal to the first set temperature or the first liquid level is greater than the first maximum set liquid level, control both the first water valve 611 and the second water valve 621 to open;

[0086] A600. When the first liquid level is less than the first minimum set liquid level, control the first water pump 8 between the first side water cavity 61 and the water inlet 21 not to work.

[0087] Specifically, when the ambient temperature is less than or equal to the first set temperature, the controller can control both the first water valve 611 and the second water valve 621 to open. That is, when the ambient temperature is less than or equal to 0°C, the first water valve 611 and the second water valve 621 open, so that the waste water stored in the first side water cavity 61 and the second side water cavity 62 can be discharged to the outside, avoiding the freezing of the waste water in the first side water cavity 61 and the second side water cavity 62 due to too low temperature and prolonging the service life of the water collecting tank 6.

[0088] Furthermore, the first liquid level sensor 612 can detect the liquid level height in the first side water cavity 61, and then obtain the first liquid level in the first side water cavity 61. When the first liquid level is less than the first minimum set liquid level, the controller can control the first water pump 8 between the first side water cavity 61 and the water inlet 21 not to work, and at this time the first water valve 611 is closed. That is, the waste water in the first side water cavity 61 does not meet the waste water volume for heat exchange with the coolant in the liquid cooling cavity, and then the first water pump 8 can be controlled not to work to save energy.

[0089] In some embodiments, as Figure 8 shown, for the control method of the stack cooling system 100, a second water pump 92 is provided at the outlet end of the second side water cavity 62, and the control method further includes:

[0090] A700. Obtain the second liquid level of the second side water cavity 62;

[0091] A800. When the second liquid level is greater than the second maximum set liquid level, control both the first water valve 611 and the second water valve 621 to open;

[0092] A900: When the second liquid level is greater than the second minimum set liquid level, the second water pump 92 is controlled to start.

[0093] Specifically, a second liquid level sensor 622 is provided in the second side water chamber 62, and the second liquid level sensor 622 can detect the liquid level height in the second side water chamber 62, and then obtain the second liquid level in the second side water chamber 62, when a second maximum set liquid level and a second minimum set liquid level are set in the second side water chamber 62.

[0094] Furthermore, when the second liquid level is greater than the second maximum set liquid level, the controller can control the first water valve 611 and the second water valve 621 to open, that is, when the wastewater storage capacity in the second side water chamber 62 is large, a certain amount of wastewater needs to be discharged to the outside, and then the first water valve 611 and the second water valve 621 can be opened by the controller to discharge the wastewater to the outside.

[0095] And when the second liquid level is greater than the second minimum set liquid level, the controller can control the second water pump 92 at the outlet end of the second side water chamber 62 to open. At this time, the second water valve 621 is also opened, and the wastewater in the second side water chamber 62 is pressurized by the second water pump 92 and transported to the multiple atomizing nozzles 91 for atomization, and then the atomized wastewater is discharged to the outside.

[0096] In actual use, it can be applied to the following situations: when the coolant temperature measured by the first temperature sensor 31 is higher than the opening temperature of the stack thermostat, the controller controls the first water pump 8 to transport the waste water to the heat exchanger 2 for heat exchange to cool the heat of the coolant; when the coolant temperature is lower than the opening temperature, the first water pump 8 stops working.

[0097] When the vehicle is climbing a hill or other working conditions, the fuel cell engine is under heavy load, resulting in large heat dissipation. The controller increases the speed of the first water pump 8 based on the temperature information fed back by the first temperature sensor 31, and then uses the waste water to remove more heat from the coolant, ensuring that the fuel cell engine operates normally and does not overheat.

[0098] When the ambient temperature is lower than 0°C, the first water valve 611 and the second water valve 621 are opened to drain the waste water in the first side water chamber 61 and the second side water chamber 62 to prevent the temperature from being too low and ice from forming inside the stack cooling system 100, thereby damaging components.

[0099] The first liquid level sensor 612 and the second liquid level sensor 622 can collect the liquid level information in the first side water chamber 61 and the second side water chamber 62 respectively. When the liquid levels in the first side water chamber 61 and the second side water chamber 62 are higher than the set maximum liquid level, the first water pump 8 and the second water pump 92 work to pump the wastewater out of the water collecting tank 2 and then atomize the wastewater through the second water pump 92 and the atomizing nozzle 91 and discharge it to the outside.

[0100] The present invention also provides a vehicle.

[0101] The vehicle according to an embodiment of the present invention is provided with the fuel cell stack cooling system 100 of any one of the above.

[0102] The vehicle according to an embodiment of the present invention is provided with a fuel cell stack cooling system 100, and the fuel cell stack cooling system 100 cools the coolant by arranging a heat exchanger 2 in the liquid cooling cavity of the radiator 1, thereby improving the heat dissipation effect of the fuel cell stack cooling component. Moreover, cooling the coolant by using the waste water in the heat exchanger 2 can save energy, reduce the use cost, have a better use effect and a wider application range.

[0103] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stack heat dissipation system, characterized in that, Comprising: A circulating water path, which is connected to a stack and a first temperature sensor; A stack heat dissipation assembly, which includes a radiator and a heat exchanger. A liquid cooling cavity is formed in the radiator, and the liquid cooling cavity is connected in series in the circulating water path. The heat exchanger is installed in the liquid cooling cavity, and a heat exchange flow path is formed in the heat exchanger; A water collecting tank and a waste water path. The water collecting tank has a first side water cavity and a second side water cavity. The first side water cavity is communicated between the waste water path and the water inlet of the heat exchange flow path, and is provided with a first water valve and a first liquid level sensor. The second side water cavity is communicated with the water outlet of the heat exchange flow path and is provided with a second water valve and a second liquid level sensor; A second temperature sensor and a controller. The second temperature sensor is used to detect the ambient temperature, and the controller is adapted to control the first water valve and the second water valve respectively according to the detection results of the second temperature sensor, the first liquid level sensor, the second liquid level sensor and the first temperature sensor.

2. The stack heat dissipation system according to claim 1, characterized in that, A first water pump is provided between the first side water cavity and the water inlet; And / or, a drain pipe is connected to the outlet end of the second side water cavity, and a second water pump is provided in the drain pipe; Wherein, the controller is electrically connected to the first water pump and the second water pump respectively to control the opening or closing of the first water pump and the second water pump.

3. The stack heat dissipation system according to claim 2, characterized in that, An atomizing nozzle is provided at the water outlet end of the drain pipe.

4. The stack heat dissipation system according to any one of claims 1-3, characterized in that, The radiator includes a first water chamber, a main body part and a second water chamber. The first water chamber and the second water chamber are respectively installed at both ends of the main body part. The radiator is provided with a coolant inlet and a coolant outlet respectively communicated with the liquid cooling cavity. The coolant inlet is arranged in the first water chamber, the coolant outlet is arranged in the second water chamber, and the first water chamber and the second water chamber are communicated through a flow path in the main body part. The heat exchanger is located in the first water chamber or the second water chamber.

5. The stack heat dissipation system according to claim 4, characterized in that, The heat exchanger is located in the second water chamber, and the distance between the coolant outlet and the water outlet is less than the distance between the coolant outlet and the water inlet.

6. The stack heat dissipation system according to claim 4, characterized in that, The heat exchanger is configured as a column, and the water inlet and the water outlet are respectively arranged at both ends of the heat exchanger, and the water outlet is located at one end of the heat exchanger close to the coolant outlet.

7. The stack heat dissipation system according to claim 1, characterized in that, Further comprising: A fan, which is arranged opposite to the radiator.

8. A control method for a stack heat dissipation system, characterized in that, Applicable to the stack heat dissipation system according to any one of claims 1-7, and a first water pump is provided between the first side water cavity and the water inlet. The control method includes: Obtaining the ambient temperature; When the ambient temperature is greater than a first set temperature, obtaining the first liquid level of the first side water cavity; When the first liquid level is less than a first maximum set liquid level and greater than a first minimum set liquid level, obtaining the temperature of the coolant in the circulating water path; When the temperature of the coolant is greater than a set opening temperature, controlling the first water valve and the first water pump to open.

9. The control method for a stack heat dissipation system according to claim 8, characterized in that, Further comprising: When the ambient temperature is less than or equal to the first set temperature or the first liquid level is greater than the first maximum set liquid level, controlling both the first water valve and the second water valve to open; When the first liquid level is lower than the first minimum set liquid level, control the first water pump between the first side water chamber and the water inlet to stop working.

10. The control method for a stack heat dissipation system according to claim 8, characterized in that, A second water pump is provided at the outlet end of the second side water chamber, and the control method further includes: Obtain the second liquid level of the second side water chamber; When the second liquid level is higher than the second maximum set liquid level, control both the first water valve and the second water valve to open; When the second liquid level is higher than the second minimum set liquid level, control the second water pump to start.

11. A vehicle, characterized in that, An electric stack heat dissipation system according to any one of claims 1-7 is provided.

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