Cooling system for fuel cell and method for controlling cooling system

Abstract

The invention discloses a cooling system for a fuel cell and a control method of the cooling system, and the cooling system comprises: a material storage box for storing a heat exchange medium; the first medium flow path is communicated with the material storage box and is also suitable for being communicated with a cell inlet of the fuel cell, and the first medium flow path is provided with a driving pump; the second medium flow path is communicated with the material storage box and is also suitable for being communicated with a cell outlet of the fuel cell, and the second medium flow path is provided with a pressure regulating valve; and the bypass flow path is connected between the first medium flow path and the second medium flow path and is provided with a flow regulating valve. Therefore, the pressure in the cooling system can be controlled by controlling the opening degree of the flow regulating valve on the bypass flow path, controlling the flow of the heat exchange medium flowing into the fuel cell and controlling the pressure regulating valve on the second medium flow path, so that the flow and the pressure in the cooling system are controlled together.

Description

Technical Field

[0001] The present invention relates to the field of heat exchange, and in particular to a cooling system for a fuel cell and a control method of the cooling system. Background Art

[0002] In the related art, the cooling system of the hydrogen fuel cell system test bench exchanges heat for the fuel cell to test the cooling performance requirements of the fuel cell under different power conditions. However, the existing cooling system can only adjust the flow rate alone, and the pressure changes with the characteristic curve of the pump in the cooling system, and it is impossible to achieve simultaneous control of the flow rate and pressure in the cooling system. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a cooling system for a fuel cell, in which the flow rate and pressure of a heat exchange medium in the cooling system can be controlled simultaneously.

[0004] The present invention further proposes a control method for a cooling system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cooling system for a fuel cell according to the present invention comprises: a material storage box, a first medium flow path, a second medium flow path and a bypass flow path. The material storage box is used to store a heat exchange medium; the first medium flow path is connected to the material storage box and is also suitable for connecting to the battery inlet of the fuel cell, and the first medium flow path is provided with a driving pump; the second medium flow path is connected to the material storage box and is also suitable for connecting to the battery outlet of the fuel cell, and the second medium flow path is provided with a pressure regulating valve; the bypass flow path is connected between the first medium flow path and the second medium flow path and is provided with a flow regulating valve.

[0007] According to the cooling system for fuel cells of the present invention, the flow rate of the heat exchange medium flowing into the fuel cell is controlled by controlling the opening of the flow regulating valve on the bypass flow path, and the pressure in the cooling system can be controlled by controlling the pressure regulating valve on the second medium flow path, thereby realizing the control of both the flow rate and the pressure in the cooling system.

[0008] In some embodiments of the present invention, the first medium flow path has a first medium inlet and a first medium outlet, the first medium inlet is connected to the material storage box, the first medium outlet is suitable for connecting to the battery inlet, and the connection between the bypass flow path and the first medium flow path is located between the first medium inlet and the first medium outlet.

[0009] In some embodiments of the present invention, the first medium flow path is provided with a flow meter, and in the flow direction of the heat exchange medium in the first medium flow path, the connection between the bypass flow path and the first medium flow path is located on the upstream side of the flow meter.

[0010] In some embodiments of the present invention, the second medium flow path has a second medium inlet and a second medium outlet, the second medium inlet is suitable for communicating with the battery outlet, the second medium outlet is communicated with the material storage box, and the connection between the bypass flow path and the second medium flow path is located between the second medium inlet and the second medium outlet.

[0011] In some embodiments of the present invention, in the flow direction of the heat exchange medium in the second medium flow path, the connection between the bypass flow path and the second medium flow path is located at the downstream side of the pressure regulating valve.

[0012] In some embodiments of the present invention, the cooling system for a fuel cell further includes: a heat exchanger, wherein the heat exchanger is disposed in the first medium flow path.

[0013] In some embodiments of the present invention, the cooling system for a fuel cell further includes: a third medium flow path, the third medium flow path is connected to the material storage box and is also suitable for connecting to a medium source, the third medium flow path is provided with a medium replenishing solenoid valve, the material storage box has a plurality of liquid level gauges arranged at different heights, and the medium replenishing solenoid valve is configured to open or close according to the detection information of the liquid level gauge.

[0014] In some embodiments of the present invention, the cooling system for a fuel cell further includes: a medium discharge flow path, the medium discharge flow path is connected to the material storage box and is provided with a medium discharge solenoid valve.

[0015] In some embodiments of the present invention, the pressure regulating valve and / or the flow regulating valve is configured as a V-type ball valve.

[0016] According to the control method for a cooling system for a fuel cell of the present invention, the cooling system comprises a material storage box, a first medium flow path, a second medium flow path and a bypass flow path, the material storage box is used to store a heat exchange medium, the first medium flow path is communicated with the material storage box and is also suitable for communicating with a battery inlet of the fuel cell, the first medium flow path is provided with a driving pump, the second medium flow path is communicated with the material storage box and is also suitable for communicating with a battery outlet of the fuel cell, the second medium flow path is provided with a pressure regulating valve, the bypass flow path is connected between the first medium flow path and the second medium flow path and is provided with a flow regulating valve, and the control method comprises the following steps:

[0017] Before the fuel cell is operated, the driving pump is controlled to be turned on and the pressure regulating valve is controlled to be turned on, so that the heat exchange medium flows into the first medium flow path, the fuel cell and the second medium flow path, and then the driving pump is controlled to be turned off;

[0018] When the fuel cell is running, the driving pump is controlled to start, and the opening of the pressure regulating valve and / or the flow regulating valve is controlled and adjusted to adjust the pressure in the cooling system and / or the flow of the heat exchange medium in the cooling system.

[0019] 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

[0020] 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:

[0021] Figure 1 is a schematic diagram of a cooling system according to an embodiment of the present invention;

[0022] Figure 2 is a flow chart of a control method according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Material storage box 1;

[0025] First medium flow path 2; first pressure transmitter 201; driving pump 3;

[0026] Second medium flow path 4; second one-way valve 41; pressure regulating valve 5;

[0027] Bypass flow path 8; flow regulating valve 9;

[0028] First medium inlet 10; first medium outlet 11; flow meter 12;

[0029] Second medium inlet 13; second medium outlet 14;

[0030] Heat exchanger 15;

[0031] The third medium flow path 16; the first one-way valve 161; the filter 162; the second pressure transmitter 163;

[0032] Medium source 17; medium replenishing solenoid valve 18;

[0033] Liquid level gauge 19; Pressure relief valve 20;

[0034] Medium discharge flow path 21; medium discharge solenoid valve 22; medium discharge port 23;

[0035] Medium inlet ball valve 24; medium outlet ball valve 25. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] like Figure 1As shown, the cooling system for a fuel cell according to an embodiment of the present invention comprises: a material storage box 1, a first medium flow path 2, a second medium flow path 4 and a bypass flow path 8. The material storage box 1 is used to store heat exchange medium; the first medium flow path 2 is connected to the material storage box 1 and is also suitable for connecting to the battery inlet of the fuel cell, and the first medium flow path 2 is provided with a driving pump 3; the second medium flow path 4 is connected to the material storage box 1 and is also suitable for connecting to the battery outlet of the fuel cell, and the second medium flow path 4 is provided with a pressure regulating valve 5; the bypass flow path 8 is connected between the first medium flow path 2 and the second medium flow path 4 and is provided with a flow regulating valve 9.

[0041] The material storage box 1 is used to store heat exchange medium, which can be a liquid heat exchange medium or a gaseous heat exchange medium. The first medium flow path 2 is connected to the material storage box 1, and the first medium flow path 2 is also suitable for connecting to the battery inlet of the fuel cell, for example: one end of the first medium flow path 2 is connected to the material storage box 1, and the other end of the first medium flow path 2 is connected to the battery inlet. The first medium flow path 2 is provided with a driving pump 3, which is used to drive the heat exchange medium to flow in the cooling system when working, and can pump the heat exchange medium in the material storage box 1 into the first medium flow path 2.

[0042] The second medium flow path 4 is connected to the material storage box 1, and the second medium flow path 4 is also suitable for being connected to the battery outlet of the fuel cell, for example: one end of the second medium flow path 4 is connected to the material storage box 1 and the other end of the second medium flow path 4 is suitable for being connected to the battery outlet. The second medium flow path 4 is provided with a pressure regulating valve 5. By adjusting the opening of the pressure regulating valve 5, the speed at which the heat exchange medium in the fuel cell flows out of the fuel cell can be controlled, thereby achieving the effect of regulating the pressure in the cooling system. For example: when the pressure in the cooling system needs to be reduced, the pressure regulating valve 5 is adjusted to increase the opening, the flow rate of the heat exchange medium flowing out of the fuel cell per unit time increases, and the pressure in the cooling system decreases accordingly. When the pressure in the cooling system needs to be increased, the pressure regulating valve 5 is adjusted to decrease the opening, the flow rate of the heat exchange medium flowing out of the fuel cell per unit time decreases, and the pressure in the cooling system increases accordingly, so as to achieve the regulation of the pressure in the cooling system.

[0043] The bypass flow path 8 is connected between the first medium flow path 2 and the second medium flow path 4, and the bypass flow path 8 is suitable for connecting the first medium flow path 2 and the second medium flow path 4, and the bypass flow path 8 is provided with a flow regulating valve 9. By adjusting the opening of the flow regulating valve 9, the flow rate of the heat exchange medium flowing into the fuel cell can be controlled. When it is necessary to increase the flow rate of the heat exchange medium flowing into the fuel cell, the opening of the flow regulating valve 9 is reduced, the flow rate of the heat exchange medium entering the bypass flow path 8 is reduced, and the flow rate of the heat exchange medium flowing into the fuel cell increases accordingly. When it is necessary to reduce the flow rate of the heat exchange medium flowing into the fuel cell, the opening of the flow regulating valve 9 is increased, the flow rate of the heat exchange medium entering the bypass flow path 8 is increased, and the flow rate of the heat exchange medium flowing into the fuel cell is reduced accordingly, so as to achieve the regulation of the flow rate. Then the flow rate and pressure of the cooling system are regulated.

[0044] Specifically, when the cooling system exchanges heat with the fuel cell, the pump 3 is driven to work, and the heat exchange medium in the material storage box 1 is pumped into the first medium flow path 2, and the opening of the flow regulating valve 9 on the bypass flow path 8 is adjusted. After the flow regulating valve 9 is opened, a part of the heat exchange medium flows into the second medium flow path 4 through the bypass flow path 8, and the other part of the heat exchange medium flows into the fuel cell through the battery inlet along the first medium flow path 2. The heat exchange medium flowing into the fuel cell exchanges heat with the fuel cell and flows into the second medium flow path 4 from the battery outlet. The heat exchange medium flowing into the second medium flow path 4 flows into the material storage box 1 along the second medium flow path 4, and the entire heat exchange cycle is realized. When it is necessary to adjust the pressure of the cooling system, the pressure in the cooling system is adjusted by adjusting the opening of the pressure regulating valve 5. When it is necessary to adjust the flow of the heat exchange medium flowing into the fuel cell, the flow of the heat exchange medium flowing into the fuel cell can be adjusted by adjusting the opening of the flow regulating valve.

[0045] Therefore, through the cooling system of the embodiment of the present invention, by controlling the opening of the flow regulating valve 9 on the bypass flow path 8, the flow rate of the heat exchange medium flowing into the fuel cell is controlled, and by controlling the opening of the pressure regulating valve 5 on the second medium flow path 4, the pressure in the cooling system can be controlled, thereby realizing the control of the flow and pressure in the cooling system, so that the cooling system meets the cooling performance requirements of the fuel cell under different power conditions.

[0046] In some embodiments of the present invention, Figure 1 As shown, the first medium flow path 2 has a first medium inlet 10 and a first medium outlet 11, the first medium inlet 10 is connected to the material storage box 1, the first medium outlet 11 is suitable for connecting to the battery inlet, and the connection between the bypass flow path 8 and the first medium flow path 2 is located between the first medium inlet 10 and the first medium outlet 11.

[0047] Among them, the first medium inlet 10 is connected to the material storage box 1, and the first medium outlet 11 is suitable for connecting to the battery inlet, so that the first medium flow path 2 connects the material storage box 1 and the battery inlet. The heat exchange medium in the material storage box 1 flows into the first medium flow path 2 from the first medium inlet 10, and then flows into the battery inlet through the first medium outlet 11. The heat exchange medium flows into the fuel cell through the battery inlet and exchanges heat with the fuel cell. The connection between the bypass flow path 8 and the first medium flow path 2 is located between the first medium inlet 10 and the first medium outlet 11, so as to achieve the effect of diverting the heat exchange medium during the flow of the first medium flow path 2, thereby achieving the regulation of the flow rate.

[0048] In some embodiments of the present invention, Figure 1 As shown, the first medium flow path 2 may be provided with a flow meter 12 , and in the flow direction of the heat exchange medium in the first medium flow path 2 , the connection between the bypass flow path 8 and the first medium flow path 2 is located on the upstream side of the flow meter 12 .

[0049] The flow meter 12 is a meter used to measure the total amount of fluid in a selected time interval, in other words, a meter used to measure the fluid flow rate. Figure 1 As shown, the flow direction of the heat exchange medium in the first medium flow path 2 is from left to right. In the flow direction of the heat exchange medium in the first medium flow path 2, the connection between the bypass flow path 8 and the first medium flow path 2 is located on the upstream side of the flow meter 12, that is, Figure 1 As shown, the connection between the bypass flow path 8 and the first medium flow path 2 is located on the left side of the flow meter 12. By setting the flow meter 12, the flow rate of the heat exchange medium flowing into the fuel cell can be accurately detected so that the cooling system can meet the cooling performance requirements of the fuel cell under different power conditions.

[0050] In some embodiments of the present invention, Figure 1 As shown, the second medium flow path 4 has a second medium inlet 13 and a second medium outlet 14, the second medium inlet 13 is suitable for communicating with the battery outlet, the second medium outlet 14 is connected to the material storage box 1, and the connection between the bypass flow path 8 and the second medium flow path 4 is located between the second medium inlet 13 and the second medium outlet 14.

[0051] Among them, the second medium flow path inlet 13 is connected to the battery outlet of the fuel cell, and the second medium outlet 14 is connected to the material storage box 1. After the heat exchange medium exchanges heat with the fuel cell, it flows into the second medium flow path 4 through the battery outlet of the fuel cell, and finally flows back to the material storage box 1. The connection between the bypass flow path 8 and the second medium flow path 4 is located between the second medium inlet 13 and the second medium outlet 14, which can ensure that the heat exchange medium flowing out of the bypass flow path 8 flows into the second medium flow path 4.

[0052] In some embodiments of the present invention, Figure 1As shown, in the flow direction of the heat exchange medium in the second medium flow path 4 , the connection between the bypass flow path 8 and the second medium flow path 4 is located on the downstream side of the pressure regulating valve 5 .

[0053] Among them, Figure 1 As shown, the flow direction of the heat exchange medium in the second medium flow path 4 is from right to left. In the flow direction of the heat exchange medium in the second medium flow path 4, the connection between the bypass flow path 8 and the second medium flow path 4 is located on the downstream side of the pressure regulating valve 5, that is, the connection between the bypass flow path 8 and the second medium flow path 4 is located on the left side of the pressure regulating valve 5. By making the connection between the bypass flow path 8 and the second medium flow path 4 located on the downstream side of the pressure regulating valve 5, the heat exchange medium flowing out of the bypass flow path 8 does not flow through the pressure regulating valve 5, but directly flows into the material storage box 1 along the second medium flow path 4.

[0054] In some embodiments of the present invention, Figure 1 As shown, the cooling system may further include: a heat exchanger 15 , and the heat exchanger 15 is arranged in the first medium flow path 2 .

[0055] Among them, the heat exchanger 15 has a heat exchange function. When the heat exchange medium in the first medium flow path 2 flows through the heat exchanger 15, the heat exchange medium can exchange heat with the heat exchanger 15, thereby increasing or decreasing the temperature of the heat exchange medium. The temperature of the heat exchange medium can be adjusted to an appropriate range before the heat exchange medium flows into the fuel cell, so that the temperature of the heat exchange medium meets the use requirements.

[0056] In some embodiments of the present invention, Figure 1 As shown, the second medium flow path 4 may also be provided with a second one-way valve 41 , which may unidirectionally conduct the second medium flow path 4 to prevent the heat exchange medium in the second medium flow path 4 from flowing back to the fuel cell and the bypass flow path 8 .

[0057] In some embodiments of the present invention, Figure 1 As shown, the first medium flow path 2 may also be provided with a first pressure transmitter 201 , and the first pressure transmitter 201 may detect the pressure in the first medium flow path 2 .

[0058] In some embodiments of the present invention, Figure 1 As shown, the cooling system may further include: a third medium flow path 16, the third medium flow path 16 is connected to the material storage box 1 and is also suitable for connecting to the medium source 17, the third medium flow path 16 is provided with a medium replenishing solenoid valve 18, the material storage box 1 has a plurality of liquid level gauges 19 arranged at different heights, and the medium replenishing solenoid valve 18 is configured to open or close according to the detection information of the liquid level gauge 19.

[0059] Among them, the third medium flow path 16 is connected to the material storage box 1, and the third medium flow path 16 is also suitable for connecting with the medium source 17. The medium source 17 is a device that stores heat exchange medium. The third medium flow path 16 is connected between the medium source 17 and the material storage box 1. The heat exchange medium at the medium source 17 can flow from the medium source 17 through the third medium flow path 16 and then flow into the material storage box 1, which is used to replenish the heat exchange medium in the material storage box 1. The third medium flow path 16 can be provided with a medium replenishment solenoid valve 18. The material storage box 1 has a plurality of liquid level gauges 19 set at different heights. The liquid level gauges 19 can be set to 2, 3, 4, etc. The present application takes the setting of 3 liquid level gauges 19 as an example for explanation. The medium replenishment solenoid valve 18 is configured to be opened or closed according to the detection information of the liquid level gauge 19.

[0060] Specifically, when the liquid level meter 19 detects that the liquid level of the heat exchange medium in the material storage tank 1 is lower than the first liquid level, the medium replenishing solenoid valve 18 is controlled to open, and the heat exchange medium at the medium source 17 flows into the material storage tank 1 along the third medium flow path 16 to replenish the heat exchange medium in the material storage tank 1, thereby achieving the effect of automatically replenishing the heat exchange medium in the material storage tank 1. When the liquid level meter 19 detects that the liquid level of the heat exchange medium in the material storage tank 1 reaches the second liquid level, the medium replenishing solenoid valve 18 is controlled to close, and at this time, the heat exchange medium at the medium source 17 cannot flow into the material storage tank 1 along the third medium flow path 16. It should be noted that the height of the second liquid level is higher than the height of the first liquid level.

[0061] In some embodiments of the present invention, Figure 1 As shown, the third medium flow path 16 can also be provided with a medium inlet ball valve 24, which can be a manual ball valve. When it is necessary to replenish the heat exchange medium into the material storage box 1, the medium inlet ball valve 24 is manually adjusted to open so that the heat exchange medium at the medium source 17 can flow into the third medium flow path 16.

[0062] In some embodiments of the present invention, Figure 1 As shown, the third medium flow path 16 may also be provided with a first one-way valve 161 , which may unidirectionally conduct the third medium flow path 16 to prevent the heat exchange medium in the third medium flow path 16 from flowing back to the medium source 17 .

[0063] In some embodiments of the present invention, Figure 1 As shown, the third medium flow path 16 can also be provided with a filter 162. The filter 162 has a filtering function. When the heat exchange medium flows along the third medium flow path 16 toward the material storage box 1, when the heat exchange medium flows through the filter 162, the filter 162 can filter the heat exchange medium, thereby improving the cleanliness of the heat exchange medium flowing into the material storage box 1.

[0064] In some embodiments of the present invention, Figure 1As shown, the third medium flow path 16 may also be provided with a second pressure transmitter 163 , and the second pressure transmitter 163 may detect the pressure in the third medium flow path 16 .

[0065] In some embodiments of the present invention, Figure 1 As shown, the cooling system may further include: a medium discharge flow path 21 , which is in communication with the material storage box 1 and is provided with a medium discharge solenoid valve 22 .

[0066] The medium discharge flow path 21 has a medium discharge port 23, the medium discharge flow path 21 is connected to the material storage box 1, and the medium discharge flow path 21 is provided with a medium discharge solenoid valve 22. When the cooling system needs to be repaired, the medium discharge solenoid valve 22 is controlled to open, and the heat exchange medium in the medium storage box 1 flows out of the medium discharge port 23 through the medium discharge flow path 21, so that the heat exchange medium in the cooling system is discharged from the cooling system, which is convenient for subsequent maintenance and other operations.

[0067] In some embodiments of the present invention, Figure 1 As shown, the medium discharge flow path 21 can also be provided with a medium outlet ball valve 25, and the medium outlet ball valve 25 can be a manual ball valve. When the heat exchange medium in the cooling system needs to be discharged from the cooling system, the medium outlet ball valve 25 is manually adjusted to open, so that the heat exchange medium in the medium storage box 1 flows out of the medium discharge port 23 through the medium discharge flow path 21.

[0068] In some embodiments of the present invention, Figure 1 As shown, the substance storage tank 1 may be provided with a pressure relief valve 20 .

[0069] Among them, a pressure relief valve 20 can be provided on the material storage box 1, and the pressure relief valve 20 is configured to ensure that the pressure of the heat exchange medium in the material storage box 1 is within the safety standard. When the internal pressure of the material storage box 1 is higher than the standard pressure value, the pressure relief valve 20 is controlled to open to release the pressure, so that the material storage box 1 is depressurized and the internal pressure of the material storage box 1 is reduced, thereby reducing the risk of explosion of the cooling system.

[0070] In some embodiments of the present invention, the pressure regulating valve 5 and / or the flow regulating valve 9 are configured as V-type ball valves.

[0071] It can also be understood that the pressure regulating valve 5 or the flow regulating valve 9 is constructed as a V-shaped ball valve, or the pressure regulating valve 5 and the flow regulating valve 9 are both constructed as V-shaped ball valves. The V-shaped ball valve specifically has a V-shaped edge of the valve core, and there is a V-shaped opening on the ball. As the ball rotates, the flow rate can be adjusted by changing the area of ​​the middle opening. By constructing the pressure regulating valve 5 and / or the flow regulating valve 9 as a V-shaped ball valve, the manufacturing cost of the pressure regulating valve 5 and the flow regulating valve 9 can be reduced, the structure of the pressure regulating valve 5 and the flow regulating valve 9 can be simplified, and the working reliability of the pressure regulating valve 5 and the flow regulating valve 9 can be improved.

[0072] like Figure 2 As shown, according to the control method of the cooling system for the fuel cell according to an embodiment of the present invention, the cooling system is the cooling system in the above embodiment, the cooling system includes a material storage box, a first medium flow path, a second medium flow path and a bypass flow path, the material storage box is used to store heat exchange medium, the first medium flow path is connected to the material storage box and is also suitable for connecting to the battery inlet of the fuel cell, the first medium flow path is provided with a driving pump, the second medium flow path is connected to the material storage box and is also suitable for connecting to the battery outlet of the fuel cell, the second medium flow path is provided with a pressure regulating valve, and the bypass flow path is connected between the first medium flow path and the second medium flow path and is provided with a flow regulating valve.

[0073] The control method according to an embodiment of the present invention comprises the following steps:

[0074] S100, before the fuel cell is operated, the driving pump is controlled to be turned on and the pressure regulating valve is opened, so that the heat exchange medium flows into the first medium flow path, the fuel cell and the second medium flow path, and then the driving pump is controlled to be turned off.

[0075] Before the fuel cell is operated, the driving pump and the pressure regulating valve are turned on. The driving pump is used as a power source to push the heat exchange medium through the first medium flow path, the fuel cell, the second medium flow path, and the material storage box, and then flows back to the driving pump inlet to complete the heat exchange medium filling. The heat exchange medium fills the first medium flow path and the second medium flow path respectively, and the driving pump stops running. When the fuel cell needs to be operated, the heat exchange medium that has been filled in the cooling system can be used for heat exchange immediately, thereby improving the heat exchange efficiency of the cooling system.

[0076] S200, when the fuel cell is running, the driving pump is controlled to start, and the opening of the pressure regulating valve and / or the flow regulating valve is controlled to adjust the pressure in the cooling system and / or the flow of the heat exchange medium in the cooling system.

[0077] When the fuel cell is running, the driving pump starts, and the filled heat exchange medium circulates under the driving action of the driving pump. The filled heat exchange medium exchanges heat with the fuel cell and takes away the heat of the fuel cell stack reaction. During the circulation process, the heat exchange medium takes away the heat of the fuel cell stack reaction, and the temperature of the heat exchange medium will rise. This part of the heat is taken away by the heat exchanger of the cooling system, and the flow rate of the newly flowing heat exchange medium in the cooling system is adjusted in real time according to the inlet temperature of the heat exchange medium in the cooling system.

[0078] Specifically, the cooling system is suitable for heat exchange with the fuel cell. Before the fuel cell is operated, the driving pump is controlled to be turned on and the pressure regulating valve is controlled to be turned on, so that the heat exchange medium flows into the first medium flow path, the fuel cell and the second medium flow path, and then the driving pump is controlled to be turned off to complete the filling of the heat exchange medium. When the fuel cell is in operation, the driving pump is controlled to work and the heat exchange medium in the material storage box is pumped into the first medium flow path. When the flow of the heat exchange medium in the cooling system needs to be adjusted, the opening of the flow regulating valve on the bypass flow path is adjusted. After the flow regulating valve is opened, a part of the heat exchange medium flows into the second medium flow path through the bypass flow path, and another part of the heat exchange medium flows into the fuel cell through the battery inlet along the first medium flow path. The heat exchange medium flowing into the fuel cell exchanges heat with the fuel cell and flows into the second medium flow path from the battery outlet. The heat exchange medium flowing into the second medium flow path flows into the material storage box along the second medium flow path to realize the entire heat exchange cycle. When the pressure of the cooling system needs to be adjusted, the pressure in the cooling system is adjusted by adjusting the opening of the pressure regulating valve. When the flow of the heat exchange medium flowing into the fuel cell needs to be adjusted, the flow of the heat exchange medium flowing into the fuel cell can be adjusted by adjusting the opening of the flow regulating valve.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. 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 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0080] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cooling system for a fuel cell, characterized in that: include: A material storage box (1), wherein the material storage box (1) is used to store a heat exchange medium; A first medium flow path (2), the first medium flow path (2) being in communication with the material storage box (1) and also being adapted to be in communication with a cell inlet (6) of the fuel cell, the first medium flow path (2) being provided with a driving pump (3); a second medium flow path (4), the second medium flow path (4) being in communication with the material storage box (1) and also being adapted to be in communication with a cell outlet (7) of the fuel cell, the second medium flow path (4) being provided with a pressure regulating valve (5); A bypass flow path (8), the bypass flow path (8) is connected between the first medium flow path (2) and the second medium flow path (4) and is provided with a flow regulating valve (9).

2. The cooling system for a fuel cell according to claim 1, characterized in that: The first medium flow path (2) has a first medium inlet (10) and a first medium outlet (11), the first medium inlet (10) is connected to the material storage box (1), the first medium outlet (11) is suitable for connecting to the battery inlet (6), and the connection between the bypass flow path (8) and the first medium flow path (2) is located between the first medium inlet (10) and the first medium outlet (11).

3. The cooling system for a fuel cell according to claim 2, characterized in that: The first medium flow path (2) is provided with a flow meter (12), and in the flow direction of the heat exchange medium in the first medium flow path (2), the connection between the bypass flow path (8) and the first medium flow path (2) is located on the upstream side of the flow meter (12).

4. The cooling system for a fuel cell according to claim 1, characterized in that: The second medium flow path (4) has a second medium inlet (13) and a second medium outlet (14), the second medium inlet (13) is suitable for communicating with the battery outlet (7), the second medium outlet (14) is connected to the material storage box (1), and the connection between the bypass flow path (8) and the second medium flow path (4) is located between the second medium inlet (13) and the second medium outlet (14).

5. The cooling system for a fuel cell according to claim 4, characterized in that: In the flow direction of the heat exchange medium in the second medium flow path (4), the connection point between the bypass flow path (8) and the second medium flow path (4) is located on the downstream side of the pressure regulating valve (5).

6. The cooling system for a fuel cell according to claim 1, characterized in that: Also includes: A heat exchanger (15), wherein the heat exchanger (15) is arranged in the first medium flow path (2).

7. The cooling system for a fuel cell according to claim 1, characterized in that: The invention also comprises: a third medium flow path (16), the third medium flow path (16) being connected to the material storage box (1) and also being suitable for being connected to a medium source (17), the third medium flow path (16) being provided with a medium replenishing solenoid valve (18), the material storage box (1) having a plurality of liquid level gauges (19) arranged at different heights, the medium replenishing solenoid valve (18) being configured to be opened or closed according to detection information of the liquid level gauge (19).

8. The cooling system for a fuel cell according to claim 1, characterized in that: Also includes: A medium discharge flow path (21), the medium discharge flow path (21) is communicated with the material storage box (1) and is provided with a medium discharge solenoid valve (22).

9. A cooling system for a fuel cell according to any one of claims 1 to 8, characterized in that: The pressure regulating valve (5) and / or the flow regulating valve (9) are configured as V-shaped ball valves.

10. A control method for a cooling system of a fuel cell, characterized in that: The cooling system comprises a material storage box, a first medium flow path, a second medium flow path and a bypass flow path, the material storage box is used to store a heat exchange medium, the first medium flow path is communicated with the material storage box and is also suitable for communicating with a battery inlet of the fuel cell, the first medium flow path is provided with a driving pump, the second medium flow path is communicated with the material storage box and is also suitable for communicating with a battery outlet of the fuel cell, the second medium flow path is provided with a pressure regulating valve, the bypass flow path is connected between the first medium flow path and the second medium flow path and is provided with a flow regulating valve, and the control method comprises the following steps: Before the fuel cell is operated, the driving pump is controlled to be turned on and the pressure regulating valve is controlled to be turned on, so that the heat exchange medium flows into the first medium flow path, the fuel cell and the second medium flow path, and then the driving pump is controlled to be turned off; When the fuel cell is running, the driving pump is controlled to start, and the opening of the pressure regulating valve and / or the flow regulating valve is controlled and adjusted to adjust the pressure in the cooling system and / or the flow of the heat exchange medium in the cooling system.

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