Gas-liquid separator, fuel cell vehicle and control method of gas-liquid separator

Abstract

The present invention provides a gas-liquid separator, a fuel cell vehicle and a control method for the gas-liquid separator. The gas-liquid separator is used for a fuel cell vehicle. The fuel cell vehicle includes a battery stack. The gas-liquid separator includes a liquid collecting portion, a first liquid drain port, a second liquid drain port, a first liquid drain assembly and a second liquid drain assembly. The liquid collecting portion is located at the bottom of the gas-liquid separator, the first liquid drain port is located at the bottom of the liquid collecting portion, and the second liquid drain port is located at the side of the liquid collecting portion. The first liquid drain assembly is connected to the first liquid drain port and can control the opening or closing of the first liquid drain port. The second liquid drain assembly is connected to the second liquid drain port and can control the opening or closing of the second liquid drain port. The gas-liquid separator provided by the present invention can prevent the first liquid drain port and the second liquid drain port from being blocked, so that the first liquid drain port and the second liquid drain port can be drained more smoothly when the fuel cell vehicle is used again, thereby enabling the fuel cell vehicle to start smoothly at low temperatures.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell vehicles, and in particular to a gas-liquid separator, a fuel cell vehicle and a control method for the gas-liquid separator. Background Art

[0002] At present, when the battery stack of a fuel cell vehicle generates electricity, water is generated in the battery stack, and due to the concentration difference, part of the water is discharged to the anode through the electrolyte membrane. When the anode discharges water, part of the hydrogen is also discharged along with the water. After the water and hydrogen are discharged, they will enter the gas-liquid separator. After the water and hydrogen are separated in the enterprise separator, the water is discharged and the hydrogen circulates to the anode.

[0003] In the related art, in order to drain the water in the gas-liquid separator smoothly, the drain port of the gas-liquid separator is usually set at the bottom of the gas-liquid separator. However, due to the presence of water vapor in the gas-liquid separator, a certain amount of water will still form in the gas-liquid separator after the battery stack stops reacting. If it is at a relatively low temperature outdoors, this part of water will be frozen and block the drain port at the bottom of the gas-liquid separator. When the fuel cell vehicle is used again, the drain port cannot drain water normally, causing the fuel cell vehicle to be unable to start at low temperatures. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present invention provides a gas-liquid separator.

[0006] A second aspect of the present invention provides a control method for a gas-liquid separator.

[0007] A third aspect of the present invention provides a fuel cell vehicle.

[0008] In view of this, a first aspect of the present invention provides a gas-liquid separator, which is used for a fuel cell vehicle. The fuel cell vehicle includes a battery stack, and the gas-liquid separator includes a liquid collecting portion, a first liquid drain port, a second liquid drain port, a first liquid drain assembly and a second liquid drain assembly; the liquid collecting portion is located at the bottom of the gas-liquid separator, the first liquid drain port is located at the bottom of the liquid collecting portion, and the second liquid drain port is located at the side of the liquid collecting portion; the first liquid drain assembly is connected to the first liquid drain port and can control the opening or closing of the first liquid drain port; the second liquid drain assembly is connected to the second liquid drain port and can control the opening or closing of the second liquid drain port.

[0009] In the gas-liquid separator provided by the present invention, the first drain port is located at the bottom of the liquid collecting part, and the second drain port is located at the side of the first drain port, so that the position of the second drain port is higher than the position of the first drain port. The first drain assembly is connected to the first drain port, and can control the opening or closing of the first drain port, thereby realizing the control of the first drain port, so that the first drain port can be opened or closed according to the need of draining. The second drain assembly is connected to the second drain port, and can control the opening or closing of the second drain port, thereby realizing the control of the second drain port, so that the second drain port can be opened or closed according to the need of draining.

[0010] When the fuel cell vehicle generates electricity, a reaction occurs in the battery stack. The liquid in the battery stack can enter the liquid collecting part and can be discharged through the first liquid drain port or the second liquid drain port. After the reaction in the battery stack stops, the fuel cell vehicle stops generating electricity. At this time, the second liquid drain port is closed and the first liquid drain port is opened. The liquid in the liquid collecting part will be discharged from the first liquid drain port, thereby preventing liquid accumulation in the liquid collecting part. Even if the ambient temperature of the gas-liquid separator is low, it will not cause ice to form in the liquid collecting part, thereby preventing the first liquid drain port and the second liquid drain port from being blocked. When the fuel cell vehicle is used again, the first liquid drain port and the second liquid drain port can drain more smoothly, thereby enabling the fuel cell vehicle to start smoothly at low temperatures.

[0011] Furthermore, since the second drain port is arranged at the side of the liquid collecting part, even if the first drain port and the second drain port are closed, the condensed liquid generated by condensation accumulates in the liquid collecting part, and this part of the liquid is not easy to block the second drain port after freezing. When the fuel cell vehicle is used again, the liquid can be drained through the second drain port, so that the fuel cell vehicle can be started more smoothly at low temperatures. After restarting again, the warm liquid enters the liquid collecting part and melts the ice, so that the first drain port can be opened again.

[0012] When the fuel cell vehicle generates electricity, the first drain port and the second drain port can also be opened at the same time, so that the liquid in the liquid storage chamber can be discharged more when the fuel cell vehicle generates electricity. Even after the reaction in the battery stack stops, the condensed liquid in the liquid collection part will not exceed the second drain port, so the second drain port will not be blocked by ice. When the fuel cell vehicle is used again, the liquid can be drained through the second drain port, so that the fuel cell vehicle can be started more smoothly at low temperatures.

[0013] Specifically, when the fuel cell vehicle generates electricity, liquid can be discharged through the first liquid discharge port, through the second liquid discharge port, or through both the first liquid discharge port and the second liquid discharge port. When the fuel cell vehicle stops generating electricity, the second liquid discharge port is closed, and the first liquid discharge port is closed after a preset delay, so that the liquid collection part can discharge more liquid, and prevent the liquid in the liquid collection part from clogging the second liquid discharge port due to ice.

[0014] In addition, the gas-liquid separator in the above technical solution provided by the present invention may also have the following additional technical features:

[0015] In a technical solution of the present invention, the first liquid discharge assembly includes a first liquid discharge pipeline and a first control valve; the first liquid discharge pipeline is connected to the first liquid discharge port; and the first control valve is arranged on the first liquid discharge pipeline.

[0016] In this technical solution, the first liquid discharge assembly includes a first liquid discharge pipeline and a first control valve. The first control valve can control the conduction or disconnection of the first liquid discharge pipe, thereby realizing control over the first liquid discharge port.

[0017] In a technical solution of the present invention, the gas-liquid separator also includes a control module, which is electrically connected to the first control valve and is used to control the first control valve to close after a preset delay when the battery stack stops reacting.

[0018] In this technical solution, the gas-liquid separator also includes a control module, which is electrically connected to the first control valve and is used to control the first control valve to delay closing for a preset period of time when the battery stack stops reacting. The liquid in the liquid collecting part will continue to be discharged from the first drain port, thereby preventing liquid accumulation in the liquid collecting part. Even if the ambient temperature of the gas-liquid separator is low, it will not cause ice to form in the liquid collecting part, thereby preventing the first drain port and the second drain port from being blocked. When the fuel cell vehicle is used again, the first drain port and the second drain port can be drained more smoothly, thereby allowing the fuel cell vehicle to start smoothly at low temperatures.

[0019] In a technical solution of the present invention, the second liquid discharge assembly includes a second liquid discharge pipeline and a second control valve; the second liquid discharge pipeline is connected to the second liquid discharge port; and the second control valve is arranged on the second liquid discharge pipeline.

[0020] In this technical solution, the second liquid discharge assembly includes a second liquid discharge pipeline and a second control valve. The second control valve can control the conduction or disconnection of the second liquid discharge pipe, thereby realizing control over the second liquid discharge port.

[0021] In a technical solution of the present invention, the distance between the first liquid discharge port and the second liquid discharge port in the vertical direction is greater than or equal to 20 mm and less than or equal to 30 mm.

[0022] In this technical solution, the vertical distance between the first drain port and the second drain port is 20 mm to 30 mm, so that there is a certain volume below the second drain port. Even after the first drain port and the second drain port are closed, the condensed liquid generated by condensation accumulates in the liquid collecting part. This part of the liquid is not easy to block the second drain port after freezing. When the fuel cell vehicle is used again, the liquid can be drained through the second drain port, thereby enabling the fuel cell vehicle to start more smoothly at low temperatures.

[0023] In a technical solution of the present invention, the gas-liquid separator further includes an air inlet and an air inlet pipeline, one end of the air inlet pipeline is connected to the air inlet, and the other end is used to connect to the battery stack.

[0024] In this technical solution, the gas-liquid separator also includes an air intake pipeline, through which the liquid and gas generated by the battery stack can be transported to the liquid collecting part, so that the liquid and gas can be separated in the liquid collecting part. While draining the liquid, the separated gas can be reused, thereby improving the power generation efficiency of the fuel cell vehicle.

[0025] In one technical solution of the present invention, the gas-liquid separator also includes an air outlet, which is higher than the second liquid discharge port. The gas-liquid separator also includes an exhaust pipeline, one end of which is connected to the air outlet, and the other end is used to connect to the fuel supply pipeline.

[0026] In this technical solution, the fuel cell vehicle also includes a fuel supply pipeline, and the gas-liquid separator also includes an exhaust pipeline, so that the gas separated in the liquid collecting part can be transported to the fuel supply pipeline through the exhaust pipeline, thereby realizing the secondary utilization of the gas, avoiding gas waste, and thereby improving the power generation efficiency of the fuel cell vehicle.

[0027] Since the air outlet is higher than the second liquid discharge port, the liquid in the liquid collecting portion can be prevented from flowing back into the fuel supply pipeline from the air outlet, thereby further improving the smoothness of liquid discharge.

[0028] In a technical solution of the present invention, the gas-liquid separator further includes a discharge pipeline, and the first liquid discharge assembly and the second liquid discharge assembly are both connected to the discharge pipeline.

[0029] In this technical solution, the gas-liquid separator also includes a discharge pipeline, and the liquid discharged from the first liquid discharge port and the second liquid discharge port is discharged into the air through the discharge pipeline, thereby realizing the discharge of the liquid.

[0030] In a technical solution of the present invention, the inner wall of the liquid collecting portion is inclined from the circumferential direction toward the first liquid discharge port.

[0031] In this technical solution, the inner wall of the liquid collecting part is inclined from the circumferential direction to the first drainage port, so that the liquid in the liquid collecting part is more concentrated on the first drainage port. After the battery stack stops reacting, the first drainage port can discharge more liquid from the liquid collecting part, thereby making the delayed drainage of the liquid collecting part more thorough and preventing the second drainage port from being blocked by liquid freezing.

[0032] A second aspect of the present invention provides a control method for a gas-liquid separator, which is used to control a gas-liquid separator such as any of the above-mentioned technical solutions. The control method for the gas-liquid separator includes: based on the battery stack being in a reaction state, controlling the second drainage component to open; based on the battery stack stopping reaction, controlling the first drainage component to open; after the first drainage component is opened for a preset period of time, controlling the first drainage component to close.

[0033] The control method of the gas-liquid separator provided by the present invention is that when the fuel cell vehicle generates electricity, a reaction occurs in the battery stack, and the liquid in the battery stack enters the liquid collecting part and can be discharged through the first liquid discharge port, or through the second liquid discharge port. After the reaction in the battery stack stops, the fuel cell vehicle stops generating electricity. At this time, the second liquid discharge port is closed and the first liquid discharge port is opened, and the liquid in the liquid collecting part is discharged from the first liquid discharge port, thereby preventing liquid from accumulating in the liquid collecting part. Even if the ambient temperature of the gas-liquid separator is low, it will not cause ice in the liquid collecting part, preventing the first liquid discharge port and the second liquid discharge port from being blocked. When the fuel cell vehicle is used again, the first liquid discharge port and the second liquid discharge port are discharged more smoothly, thereby enabling the fuel cell vehicle to start smoothly at low temperatures.

[0034] In addition, the control method of the gas-liquid separator in the above technical solution provided by the present invention may also have the following additional technical features:

[0035] In a technical solution of the present invention, the control method of the gas-liquid separator further includes: based on the battery stack being in a reaction state, controlling the first liquid discharge assembly to close.

[0036] In this technical solution, when the battery stack is in a reaction state, the first liquid draining assembly is controlled to be closed, and liquid is drained through the second liquid draining assembly, thereby simplifying the control logic of the gas-liquid separator and reducing the control difficulty of the gas-liquid separator.

[0037] In one technical solution of the present invention, after controlling the first liquid drainage component to close based on the battery stack being in a reaction state, the control method of the gas-liquid separator also includes: detecting the liquid level in the liquid collecting part; when the liquid level in the liquid collecting part is greater than or equal to a preset liquid level, controlling the first liquid drainage component to open; when the liquid level in the liquid collecting part is less than the preset liquid level, detecting the liquid level in the liquid collecting part again.

[0038] In this technical solution, when the battery stack is in a reaction state and the first drainage component is closed, the liquid level in the liquid collecting part is detected. If the liquid level is higher than the preset liquid level, the first drainage component is controlled to open, so that the first drainage component and the second drainage component drain the liquid at the same time, thereby speeding up the drainage speed and preventing the liquid from accumulating in the liquid collecting part and flowing back into the battery stack from the air outlet, thereby improving the drainage effect of the liquid collecting part.

[0039] In a technical solution of the present invention, the position of the second liquid discharge port is not lower than a preset liquid level.

[0040] In this technical solution, the position of the second drain port is not lower than the preset liquid level, so that the liquid in the gas-liquid separator can be discharged more quickly when it exceeds the second drain port, preventing the second drain port from being blocked by freezing of the liquid in the gas-liquid separator. The gas-liquid separator has at least one drain port for draining, and the liquid collecting part of the gas-liquid separator can drain more smoothly even in a frozen state, thereby improving the low-temperature starting performance of the gas-liquid separator.

[0041] In a technical solution of the present invention, the preset duration is greater than or equal to 15 seconds and less than or equal to 30 seconds.

[0042] In this technical solution, the preset time length is 15 seconds to 30 seconds, which allows the liquid in the drainage chamber to be discharged more thoroughly while preventing the first drainage port from being opened too long to cause fuel leakage.

[0043] In one technical solution of the present invention, based on the battery stack being in a reaction state, controlling the second drainage assembly to open includes: based on the battery stack being in a reaction state and the liquid in the liquid collecting part being in a frozen state, controlling the second drainage assembly to open, so as to drain liquid and / or exhaust gas through the second drainage assembly.

[0044] In this technical solution, the liquid in the liquid collecting part is in a frozen state, and this part of the liquid is not easy to block the second liquid discharge port after freezing. When the fuel cell vehicle is in use, the liquid can be discharged through the second liquid discharge port, so that the fuel cell vehicle can be started more smoothly at low temperatures. After restarting, the warm liquid enters the liquid collecting part to melt the ice, so that the first liquid discharge port can be opened again.

[0045] The third aspect of the present invention provides a fuel cell vehicle, which includes a gas-liquid separator as in any of the above-mentioned technical solutions; and / or the fuel cell vehicle adopts a control method for a gas-liquid separator as in any of the above-mentioned technical solutions to control the gas-liquid separator as in any of the above-mentioned technical solutions, so that the fuel cell vehicle has all the beneficial effects of the gas-liquid separator of any of the above-mentioned technical solutions and the control method of the gas-liquid separator of any of the above-mentioned technical solutions.

[0046] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0048] Figure 1 A schematic structural diagram of a gas-liquid separator according to an embodiment of the present invention is shown;

[0049] Figure 2 A flow chart showing a method for controlling a gas-liquid separator according to an embodiment of the present invention is shown;

[0050] Figure 3 A flow chart showing a method for controlling a gas-liquid separator according to another embodiment of the present invention;

[0051] Figure 4 A flow chart showing a method for controlling a gas-liquid separator according to another embodiment of the present invention is shown;

[0052] Figure 5 A flow chart of a method for controlling a gas-liquid separator according to yet another embodiment of the present invention is shown.

[0053] in, Figure 1 The corresponding relationship between the reference numerals and component names in the figure is:

[0054] 100 liquid collecting part, 120 first liquid discharge port, 130 second liquid discharge port, 200 first liquid discharge assembly, 210 first liquid discharge pipeline, 220 first control valve, 300 second liquid discharge assembly, 310 second liquid discharge pipeline, 320 second control valve, 400 air intake pipeline, 500 exhaust pipeline, 600 discharge pipeline. DETAILED DESCRIPTION

[0055] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0056] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0057] Refer to the following Figures 1 to 5 A gas-liquid separator, a fuel cell vehicle, and a control method of the gas-liquid separator according to some embodiments of the present invention are described.

[0058] In one embodiment of the present invention, Figure 1As shown, a gas-liquid separator is provided, and the gas-liquid separator is used for a fuel cell vehicle. The fuel cell vehicle includes a battery stack, and the gas-liquid separator includes a liquid collecting portion 100, a first liquid drain port 120, a second liquid drain port 130, a first liquid drain component 200 and a second liquid drain component 300; the liquid collecting portion 100 is located at the bottom of the gas-liquid separator, the first liquid drain port 120 is located at the bottom of the liquid collecting portion 100, and the second liquid drain port 130 is located at the side of the liquid collecting portion 100; the first liquid drain component 200 is connected to the first liquid drain port 120, and can control the opening or closing of the first liquid drain port 120; the second liquid drain component 300 is connected to the second liquid drain port 130, and can control the opening or closing of the second liquid drain port 130.

[0059] In this embodiment, the first drain port 120 is located at the bottom of the liquid collecting part 100, and the second drain port 130 is located at the side of the first drain port 120, so that the position of the second drain port 130 is higher than the position of the first drain port 120. The first drain assembly 200 is connected to the first drain port 120, and can control the opening or closing of the first drain port 120, thereby realizing the control of the first drain port 120, so that the first drain port 120 can be opened or closed according to the need of drainage. The second drain assembly 300 is connected to the second drain port 130, and can control the opening or closing of the second drain port 130, thereby realizing the control of the second drain port 130, so that the second drain port 130 can be opened or closed according to the need of drainage.

[0060] When the fuel cell vehicle generates electricity, a reaction occurs in the battery stack. The liquid in the battery stack enters the liquid collecting part 100 and can be discharged through the first liquid drain port 120 or the second liquid drain port 130. After the reaction stops in the battery stack, the fuel cell vehicle stops generating electricity. At this time, the second liquid drain port 130 is closed and the first liquid drain port 120 is opened. The liquid in the liquid collecting part 100 will be discharged from the first liquid drain port 120, thereby preventing liquid from accumulating in the liquid collecting part 100. Even if the ambient temperature of the gas-liquid separator is low, it will not cause ice to form in the liquid collecting part 100, thereby preventing the first liquid drain port 120 and the second liquid drain port 130 from being blocked. When the fuel cell vehicle is used again, the first liquid drain port 120 and the second liquid drain port 130 can be drained more smoothly, thereby enabling the fuel cell vehicle to start smoothly at low temperatures.

[0061] Furthermore, since the second drain port 130 is disposed on the side of the liquid collecting part 100, even if the first drain port 120 and the second drain port 130 are closed, the condensed liquid generated by condensation accumulates in the liquid collecting part 100, and this part of the liquid is not easy to block the second drain port 130 after freezing. When the fuel cell vehicle is used again, the liquid can be drained through the second drain port 130, so that the fuel cell vehicle can be started more smoothly at low temperatures. After restarting, the warm liquid enters the liquid collecting part 100 to melt the ice, so that the first drain port 120 can be opened again.

[0062] When the fuel cell vehicle generates electricity, the first drain port 120 and the second drain port 130 may be opened at the same time, so that the liquid in the liquid storage chamber can be discharged more when the fuel cell vehicle generates electricity. Even after the reaction in the battery stack stops, the condensed liquid in the liquid collection part 100 will not exceed the second drain port 130, so the second drain port 130 will not be blocked by ice. When the fuel cell vehicle is used again, the liquid can be drained through the second drain port 130, so that the fuel cell vehicle can be started more smoothly at low temperatures.

[0063] Specifically, when the fuel cell vehicle generates electricity, liquid can be discharged through the first liquid discharge port 120, through the second liquid discharge port 130, or through both the first liquid discharge port 120 and the second liquid discharge port 130. When the fuel cell vehicle stops generating electricity, the second liquid discharge port 130 is closed, and the first liquid discharge port 120 is closed after a preset delay, so that the liquid collecting part 100 can discharge more liquid, and prevent the liquid in the liquid collecting part 100 from clogging the second liquid discharge port 130 due to freezing.

[0064] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0065] like Figure 1 As shown, the first liquid discharge assembly 200 includes a first liquid discharge pipeline 210 and a first control valve 220 ; the first liquid discharge pipeline 210 is connected to the first liquid discharge port 120 ; and the first control valve 220 is disposed on the first liquid discharge pipeline 210 .

[0066] In this embodiment, the first liquid discharge assembly 200 includes a first liquid discharge pipeline 210 and a first control valve 220 . The first control valve 220 can control the connection or disconnection of the first liquid discharge pipe, thereby achieving control over the first liquid discharge port 120 .

[0067] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0068] The gas-liquid separator also includes a control module, which is electrically connected to the first control valve 220 and is used to control the first control valve 220 to delay closing for a preset time when the battery stack stops reacting.

[0069] In this embodiment, the gas-liquid separator also includes a control module, which is electrically connected to the first control valve 220 and is used to control the first control valve 220 to delay closing for a preset period of time when the battery stack stops reacting. The liquid in the liquid collecting part 100 will continue to be discharged from the first drain port 120, thereby preventing liquid accumulation in the liquid collecting part 100. Even if the ambient temperature of the gas-liquid separator is low, it will not cause ice to form in the liquid collecting part 100, thereby preventing the first drain port 120 and the second drain port 130 from being blocked. When the fuel cell vehicle is used again, the first drain port 120 and the second drain port 130 can drain more smoothly, thereby allowing the fuel cell vehicle to start smoothly at low temperatures.

[0070] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0071] like Figure 1 As shown, the second liquid discharge assembly 300 includes a second liquid discharge pipeline 310 and a second control valve 320 ; the second liquid discharge pipeline 310 is connected to the second liquid discharge port 130 ; and the second control valve 320 is disposed on the second liquid discharge pipeline 310 .

[0072] In this embodiment, the second liquid discharge assembly 300 includes a second liquid discharge pipeline 310 and a second control valve 320 . The second control valve 320 can control the connection or disconnection of the second liquid discharge pipe, thereby achieving control over the second liquid discharge port 130 .

[0073] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0074] like Figure 1 As shown, the distance between the first liquid discharge port 120 and the second liquid discharge port 130 in the vertical direction is greater than or equal to 20 mm and less than or equal to 30 mm.

[0075] In this embodiment, the vertical distance between the first drain port 120 and the second drain port 130 is 20 mm to 30 mm, so that there is a certain volume below the second drain port 130. Even after the first drain port 120 and the second drain port 130 are closed, the condensed liquid generated by condensation accumulates in the liquid collecting part 100. This part of the liquid is not easy to block the second drain port 130 after freezing. When the fuel cell vehicle is used again, the liquid can be drained through the second drain port 130, so that the fuel cell vehicle can be started more smoothly at low temperatures.

[0076] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0077] like Figure 1 As shown, the gas-liquid separator also includes an air inlet and an air inlet pipeline 400, one end of the air inlet pipeline 400 is connected to the air inlet, and the other end is used to connect to the battery stack.

[0078] In this embodiment, the gas-liquid separator also includes an air intake pipeline 400, and the liquid and gas generated by the battery stack can be transported to the liquid collecting part 100 through the air intake pipeline 400, so that the liquid and gas can be separated in the liquid collecting part 100. While draining the liquid, the separated gas can be reused, thereby improving the power generation efficiency of the fuel cell vehicle.

[0079] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0080] like Figure 1 As shown, the fuel cell vehicle also includes a fuel supply pipeline, and the liquid collecting part 100 also includes an outlet and an exhaust pipeline 500, the outlet is higher than the second liquid discharge port 130, one end of the exhaust pipeline 500 is connected to the outlet, and the other end is used to connect to the fuel supply pipeline.

[0081] In this embodiment, the fuel cell vehicle also includes a fuel supply pipeline, and the gas-liquid separator also includes an exhaust pipeline 500, so that the gas separated in the liquid collecting part 100 can be transported to the fuel supply pipeline through the exhaust pipeline 500, thereby realizing the secondary utilization of the gas, avoiding gas waste, and thereby improving the power generation efficiency of the fuel cell vehicle.

[0082] Since the gas outlet is higher than the second liquid drain port 130 , the liquid in the liquid collecting portion 100 can be prevented from flowing back into the fuel supply pipeline from the gas outlet, thereby further improving the smoothness of liquid drainage.

[0083] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0084] like Figure 1 As shown, the gas-liquid separator further includes a discharge pipeline 600 , and the first liquid discharge assembly 200 and the second liquid discharge assembly 300 are both connected to the discharge pipeline 600 .

[0085] In this embodiment, the gas-liquid separator further includes a discharge pipeline 600 , and the liquid discharged from the first liquid discharge port 120 and the second liquid discharge port 130 is discharged into the air through the discharge pipeline 600 , thereby achieving the discharge of the liquid.

[0086] In one embodiment of the present invention, a gas-liquid separator is provided. In addition to the technical features of the above-mentioned embodiment, this embodiment further includes the following technical features.

[0087] like Figure 1 As shown, the inner wall of the liquid collecting portion 100 is inclined from the circumferential direction toward the first liquid discharge port 120 .

[0088] In this embodiment, the inner wall of the liquid collection part 100 is inclined from the circumferential direction to the first drain port 120, so that the liquid in the liquid collection part 100 is more concentrated to the first drain port 120. After the battery stack stops reacting, the first drain port 120 can discharge more liquid from the liquid collection part 100, thereby making the delayed drainage of the liquid collection part 100 more thorough, preventing the second drain port 130 from being blocked by liquid freezing.

[0089] In one embodiment of the present invention, Figure 2 As shown, a control method for a gas-liquid separator is provided. The control method for a gas-liquid separator is used to control a gas-liquid separator as in any of the above embodiments. The control method for a gas-liquid separator includes:

[0090] Step 202, based on the battery stack being in a reaction state, controlling the second drain assembly to open;

[0091] Step 204, based on the battery stack stopping reaction, controlling the first drain assembly to open;

[0092] Step 206 , after the first liquid discharge component is turned on for a preset time period, the first liquid discharge component is controlled to be turned off.

[0093] In this embodiment, when the fuel cell vehicle generates electricity, a reaction occurs in the battery stack, and the liquid in the battery stack can be discharged through the first drain port or the second drain port after entering the liquid collecting part. After the reaction in the battery stack stops, the fuel cell vehicle stops generating electricity. At this time, the second drain port is closed and the first drain port is opened, and the liquid in the liquid collecting part is discharged from the first drain port, thereby preventing liquid from accumulating in the liquid collecting part. Even if the ambient temperature of the gas-liquid separator is low, it will not cause ice to form in the liquid collecting part, thereby preventing the first drain port and the second drain port from being blocked. When the fuel cell vehicle is used again, the first drain port and the second drain port are drained more smoothly, thereby enabling the fuel cell vehicle to start smoothly at low temperatures.

[0094] In one embodiment of the present invention, Figure 3 As shown, a control method for a gas-liquid separator is provided, and the control method for the gas-liquid separator also includes:

[0095] Step 302, based on the battery stack being in a reaction state, controlling the second drain assembly to open;

[0096] Step 304, based on the battery stack being in a reaction state, controlling the first drain assembly to close;

[0097] Step 306, based on the battery stack stopping reaction, controlling the first drain assembly to open;

[0098] Step 308: After the first liquid discharge component is turned on for a preset time, the first liquid discharge component is controlled to be turned off.

[0099] In this embodiment, when the battery stack is in a reaction state, the first liquid draining assembly is controlled to be closed, and liquid is drained through the second liquid draining assembly, thereby simplifying the control logic of the gas-liquid separator and reducing the control difficulty of the gas-liquid separator.

[0100] In one embodiment of the present invention, Figure 4 As shown, a control method for a gas-liquid separator is provided, and the control method for the gas-liquid separator also includes:

[0101] Step 402, based on the battery stack being in a reaction state, controlling the second drain assembly to open;

[0102] Step 404, based on the battery stack being in a reaction state, controlling the first drain assembly to close;

[0103] Step 406, detecting the liquid level in the liquid collecting portion;

[0104] Step 408, determining whether the liquid level in the liquid collecting portion is greater than or equal to a preset liquid level;

[0105] Step 410, when the liquid level in the liquid collecting part is greater than or equal to the preset liquid level, control the first liquid discharge assembly to open; when the liquid level in the liquid collecting part is less than the preset liquid level, detect the liquid level in the liquid collecting part again;

[0106] Step 412, based on the battery stack stopping reaction, controlling the first drain assembly to open;

[0107] Step 414, after the first liquid discharge component is turned on for a preset time, the first liquid discharge component is controlled to be turned off.

[0108] In this embodiment, when the battery stack is in a reaction state and the first drainage component is closed, the liquid level in the liquid collecting part is detected. If the liquid level is higher than the preset liquid level, the first drainage component is controlled to open, so that the first drainage component and the second drainage component drain the liquid at the same time, thereby speeding up the drainage speed and preventing the liquid from accumulating in the liquid collecting part and flowing back into the battery stack from the air outlet, thereby improving the drainage effect of the liquid collecting part.

[0109] In one embodiment of the present invention, the position of the second liquid discharge port is not lower than a preset liquid level.

[0110] In this embodiment, the position of the second drain port is not lower than the preset liquid level, so that the liquid in the gas-liquid separator can be discharged more quickly when it exceeds the second drain port, preventing the second drain port from being blocked by freezing of the liquid in the gas-liquid separator, so that the gas-liquid separator has at least one drain port for draining, and the liquid collecting part of the gas-liquid separator can drain more smoothly even in a frozen state, thereby improving the low-temperature starting performance of the gas-liquid separator.

[0111] In one embodiment of the present invention, the preset duration is greater than or equal to 15 seconds and less than or equal to 30 seconds.

[0112] In this embodiment, the preset time length is 15 seconds to 30 seconds, so that the liquid in the drainage chamber can be discharged more thoroughly, while preventing the first drainage port from being opened for too long to cause fuel leakage.

[0113] In one embodiment of the present invention, Figure 5 As shown, a control method for a gas-liquid separator is provided, and the control method for the gas-liquid separator includes:

[0114] Step 502, based on the battery stack being in a reaction state and the liquid in the liquid collecting portion being in a frozen state, controlling the second liquid draining assembly to open, so as to drain liquid and / or exhaust gas through the second liquid draining assembly;

[0115] Step 504, based on the battery stack stopping reaction, controlling the first drain assembly to open;

[0116] Step 506: After the first liquid discharge component is turned on for a preset time, the first liquid discharge component is controlled to be turned off.

[0117] In this embodiment, the liquid in the liquid collecting part is in a frozen state, and this part of the liquid is not easy to block the second liquid discharge port after freezing. When the fuel cell vehicle is used, the liquid can be discharged through the second liquid discharge port, so that the fuel cell vehicle can be started more smoothly at low temperatures. After restarting, the warm liquid enters the liquid collecting part to melt the ice, so that the first liquid discharge port can be opened again.

[0118] In one embodiment of the present invention, the present invention provides a fuel cell vehicle, which includes a gas-liquid separator as in any of the above embodiments; and / or the fuel cell vehicle adopts a control method for a gas-liquid separator as in any of the above embodiments to control a gas-liquid separator as in any of the above embodiments, so that the fuel cell vehicle has all the beneficial effects of the gas-liquid separator of any of the above embodiments and the control method of the gas-liquid separator of any of the above embodiments.

[0119] In the claims, specification and drawings of the present invention, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, which is only for the purpose of more conveniently describing the present invention and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limiting the present invention; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0120] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas-liquid separator, characterized in that: The gas-liquid separator is used for a fuel cell vehicle, the fuel cell vehicle includes a battery stack, and the gas-liquid separator includes: A liquid collecting portion, located at the bottom of the gas-liquid separator; a first liquid discharge port, the first liquid discharge port being located at the bottom of the liquid collecting portion; a second liquid discharge port, the second liquid discharge port being located at a side of the liquid collecting portion; a first liquid discharge component, the first liquid discharge component is connected to the first liquid discharge port and can control the opening or closing of the first liquid discharge port; a second liquid discharge component, the second liquid discharge component being connected to the second liquid discharge port and capable of controlling the opening or closing of the second liquid discharge port; The inner wall of the liquid collecting portion is inclined from the circumferential direction toward the first liquid discharge port; Wherein, the first liquid discharge port and the second liquid discharge port can be opened at the same time; The first drainage assembly comprises: a first liquid discharge pipeline, the first liquid discharge pipeline being connected to the first liquid discharge port; a first control valve, the first control valve being arranged on the first liquid discharge pipeline; The gas-liquid separator also includes: A control module, the control module is electrically connected to the first control valve, and based on the battery stack being in a reaction state, the control module controls the first drain assembly to be closed, and the control module controls the second drain assembly to be opened; based on the battery stack stopping the reaction, the control module controls the first drain assembly to be opened; The second drainage assembly comprises: a second liquid discharge pipeline, the second liquid discharge pipeline being connected to the second liquid discharge port; A second control valve, wherein the second control valve is arranged on the second liquid discharge pipeline.

2. The gas-liquid separator according to claim 1, characterized in that: The control module is also used to control the first control valve to close after a preset delay time when the battery stack stops reacting.

3. The gas-liquid separator according to claim 1, characterized in that: A distance between the first liquid discharge port and the second liquid discharge port in a vertical direction is greater than or equal to 20 mm and less than or equal to 30 mm.

4. The gas-liquid separator according to any one of claims 1 to 3, characterized in that: Also includes: Air intake; An air intake pipeline, one end of which is connected to the air intake port, and the other end of which is used to connect to the battery stack.

5. The gas-liquid separator according to any one of claims 1 to 3, characterized in that: Also includes: an air outlet, wherein the air outlet is higher than the second liquid discharge outlet; An exhaust pipeline, one end of which is connected to the air outlet, and the other end of which is used to connect to a fuel supply pipeline.

6. The gas-liquid separator according to any one of claims 1 to 3, characterized in that: Also includes: A discharge pipeline, wherein the first liquid discharge component and the second liquid discharge component are both connected to the discharge pipeline.

7. A method for controlling a gas-liquid separator, characterized in that: The control method of the gas-liquid separator is used to control the gas-liquid separator according to any one of claims 1 to 6, and the control method of the gas-liquid separator comprises: Based on the battery stack being in a reaction state, controlling the second drain assembly to open; Based on the battery stack stopping reaction, controlling the first drain assembly to open; After the first liquid discharge component is turned on for a preset time, the first liquid discharge component is controlled to be turned off.

8. The control method of the gas-liquid separator according to claim 7, characterized in that: Also includes: Based on the battery stack being in a reaction state, the first drain assembly is controlled to be closed.

9. The control method of the gas-liquid separator according to claim 8, characterized in that: After controlling the first liquid drain assembly to be closed based on the battery stack being in a reaction state, the control method of the gas-liquid separator further includes: detecting the liquid level in the liquid collecting portion; When the liquid level in the liquid collecting portion is greater than or equal to a preset liquid level, controlling the first liquid discharge assembly to open; When the liquid level in the liquid collecting portion is lower than the preset liquid level, the liquid level in the liquid collecting portion is detected again.

10. The control method of the gas-liquid separator according to any one of claims 7 to 9, characterized in that: The preset duration is greater than or equal to 15 seconds and less than or equal to 30 seconds.

11. The control method of a gas-liquid separator according to any one of claims 7 to 9, characterized in that: Based on the battery stack being in a reaction state, controlling the second drain assembly to open includes: Based on the fact that the battery stack is in a reaction state and the liquid in the liquid collecting portion is in a frozen state, the second drain assembly is controlled to open so as to drain liquid and / or exhaust gas through the second drain assembly.

12. A fuel cell vehicle, characterized in that: The fuel cell vehicle comprises a gas-liquid separator as claimed in any one of claims 1 to 6; and / or The fuel cell vehicle uses the gas-liquid separator control method according to any one of claims 7 to 11 to control the gas-liquid separator according to any one of claims 1 to 6.

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