Automatic supply system for cooling liquid of fuel cell system

Abstract

The utility model relates to the technical field of fuel cell systems, and provides an automatic cooling liquid supply system for a fuel cell system, which comprises a main water tank, a mixed tail gas discharge pipe is fixedly connected to the outer surface of the front end of the main water tank, and a water-gas separator is fixedly connected to the outer surface of one end of the mixed tail gas discharge pipe. When the fuel cell system runs, mixed tail gas is connected to the water-gas separator through the mixed tail gas discharge pipe, separated vaporous water is directly introduced into the atmosphere, liquid water flows to the main water replenishing tank, and high-concentration ethylene glycol is contained in the auxiliary water replenishing tank. Outlets of the main water replenishing tank and the auxiliary water replenishing tank are connected to the three-way connector and then converged into the mixed water replenishing tank, and an outlet of the mixed water replenishing tank is connected to a cooling liquid inlet of the main water tank of the fuel cell system, so that liquid waste water generated during operation of a fuel cell can be utilized to prepare cooling liquid suitable for working of the fuel cell system; and the resource utilization rate of the fuel cell system is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery coolant, and in particular to an automatic coolant replenishing system for a fuel cell system. Background Art

[0002] Energy shortage has always been the biggest dilemma faced by various industries. As the main energy source of traditional industrialized industries, oil plays an extremely important role in production and life. The power energy of automobiles is petroleum products, but with the gradual increase in the number of cars, the demand for crude oil has gradually increased. In addition, the existence of energy shortage has brought an impact on the future development of the automobile industry. The research and development of new energy vehicles reduces the automobile industry's dependence on traditional energy and uses electric energy to replace traditional fuel energy. At the same time, the use of other renewable resources can properly solve the problem of automobile exhaust emissions, reduce the utilization rate of non-renewable resources, effectively solve my country's energy use crisis, and promote the sustainable development of the national economy.

[0003] A fuel cell system is a complex electrochemical device. During operation, its internal components generate a large amount of heat, which needs to be removed to an external heat dissipation system through coolant for cooling. In order to meet the application requirements of low-temperature environments, the coolant in the fuel cell system is usually made of a mixture of 50% ethylene glycol and 50% deionized water, which has a low freezing point.

[0004] As the operating time of the fuel cell system increases, the coolant may evaporate naturally, causing the water level in its water tank to decrease. At this time, the coolant needs to be replenished in time to ensure the normal operation of the fuel cell system. When the fuel cell system is running, hydrogen and oxygen undergo an electrochemical reaction to generate a large amount of liquid water at its cathode, which is usually discharged directly into the atmosphere through tailpipe management, damaging the atmospheric environment and causing environmental pollution events such as photochemical smog, haze weather, and acid rain. Moreover, since the concentration height of automobile exhaust pollutants coincides with the human breathing height, it affects people's respiratory health. Utility Model Content

[0005] The utility model proposes an automatic coolant replenishment system for a fuel cell system, which aims to solve the problem that the tail water of the fuel cell is directly discharged into the atmosphere by the tail water management, causing environmental pollution and energy waste. The fuel cell tail water is mixed with high-concentration ethylene glycol to prepare a solution, thereby realizing automatic replenishment of the coolant of the fuel cell system.

[0006] The technical solution of the utility model is as follows:

[0007] A fuel cell system coolant automatic replenishing system.

[0008] In one embodiment of the present utility model, a main water tank is included, and a mixed exhaust gas discharge pipe is fixedly connected to the outer surface of the front end of the main water tank;

[0009] The outer surface of one end of the mixed tail gas discharge pipe is fixedly connected to a water-gas separator, and the outer wall of the water-gas separator is fixedly connected to a first water inlet pipe;

[0010] The outer surface of one end of the No. 1 water inlet pipe is fixedly connected to the main water supply tank, and the outer wall of the main water supply tank is fixedly connected to the No. 2 water inlet pipe;

[0011] The outer surface of one end of the No. 2 water inlet pipe is fixedly connected to a mixed water supply tank, and the outer wall of the mixed water supply tank is fixedly connected to an ethylene glycol pipe;

[0012] The outer surface of one end of the ethylene glycol pipe is fixedly connected to a secondary water supply tank, and the outer wall of the mixed water supply tank is fixedly provided with a mixed liquid pipe.

[0013] In one embodiment of the present invention, a liquid level sensor is detachably connected to the outer surface of the upper end of the main water tank, and a liquid level sensing wire is fixedly connected to the outer surface of the upper end of the liquid level sensor.

[0014] In one embodiment of the present invention, the outer surface of one end of the liquid level sensor line is fixedly connected to a battery system, and the outer surface of the front end of the battery system is fixedly connected to a water pump control line.

[0015] In one embodiment of the present invention, the front end outer surface of the main water tank is fixedly connected to an exhaust gas discharge port, the upper end outer surface of the main water tank is fixedly connected to a mixed liquid inlet, and the upper end outer surface of the main water tank is fixedly connected to a liquid injection port.

[0016] In one embodiment of the present invention, an outer surface of the upper end of the liquid injection port is fixedly connected to a liquid injection tube, and an outer wall of the liquid injection tube is fixedly connected to a movable latch.

[0017] In one embodiment of the present invention, a filter screen is fixedly connected to the inner wall of the liquid injection tube, and a liquid injection top cover is movably sleeved on the outer surface of the upper end of the liquid injection tube;

[0018] The outer surface of the lower end of the liquid injection top cover is fixedly connected with a movable connecting bolt, and the outer wall of the liquid injection top cover is fixedly connected with a clamping strip.

[0019] In one embodiment of the present invention, the outer wall of the mixing water supply tank is fixedly connected to a mixed liquid control pump, the outer wall of the mixing water supply tank is fixedly connected to a No. 2 water inlet, and the outer wall of the mixing water supply tank is fixedly connected to an ethylene glycol inlet.

[0020] In one embodiment of the present invention, an ethylene glycol injection cap is movably connected to the outer surface of the upper end of the auxiliary water supply tank, and an ethylene glycol control pump is fixedly connected to the outer wall of the auxiliary water supply tank.

[0021] Furthermore, the utility model provides a fuel cell system coolant automatic replenishment system including the above-mentioned one, characterized in that the outer wall of the main water replenishment tank is fixedly connected to a liquid inlet pump, and the outer surface of the upper end of the main water replenishment tank is fixedly connected to an exhaust pipe.

[0022] The working principle and beneficial effects of the utility model are as follows:

[0023] 1. In the present invention, a main water tank is provided to replenish coolant for the fuel cell system. When the fuel cell system is in operation, the mixed exhaust gas is connected to the water-gas separator through the mixed exhaust gas discharge pipe. The separated gaseous water is directly introduced into the atmosphere, and the liquid water flows to the main water supply tank. The auxiliary water supply tank is filled with high-concentration ethylene glycol. The outlets of the main and auxiliary water supply tanks are connected to a three-way joint and then merged into the mixed water supply tank. The outlet of the mixed water supply tank is connected to the coolant inlet of the main water tank of the fuel cell system, so that the liquid wastewater generated during the operation of the fuel cell can be utilized to make coolant suitable for the operation of the fuel cell system, which will effectively improve the resource utilization rate of the fuel cell system, while improving the system reliability and reducing the difficulty of personnel maintenance.

[0024] 2. In the present invention, the liquid level sensing line and the liquid level sensor cooperate with each other to transmit the water level height of each water tank to the battery system. The battery system then determines whether to turn on the corresponding intelligent water pump based on the corresponding water level height, making the fuel cell system coolant automatic replenishment system more intelligent, greatly improving its practicality and efficiency.

[0025] 3. In the present invention, the movable latch and the card strip cooperate with each other so that when the main water tank needs to be filled with liquid, it is only necessary to press the bottom end of the movable latch to open the liquid filling cover. After the liquid filling is completed, the liquid filling cover is closed and the card strip is embedded in the movable latch to fix it. The operation is simple, fast and effectively reduces the time required for filling the main water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0027] Figure 1 This is a diagram of the energy pipeline structure of an automatic coolant replenishment system for a fuel cell system according to an embodiment of the present utility model;

[0028] Figure 2 This is a control circuit structure diagram of a fuel cell system coolant automatic replenishment system in an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the overall structure of a main water tank in an automatic coolant replenishment system for a fuel cell system according to an embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of the exploded structure of a liquid filling top cover in an automatic coolant replenishing system for a fuel cell system according to an embodiment of the present utility model;

[0031] Figure 5 This is an overall structural diagram of a mixing water supply tank in an automatic coolant supply system for a fuel cell system according to an embodiment of the present utility model;

[0032] Figure 6 This is a schematic diagram of the exploded structure of important components in an automatic coolant replenishment system for a fuel cell system according to an embodiment of the present utility model.

[0033] Figure markings: 1. Main water tank; 2. Mixed exhaust emission pipe; 3. Water-gas separator; 4. No. 1 water inlet pipe; 5. Auxiliary water supply tank; 6. Main water supply tank; 7. No. 2 water inlet pipe; 8. Ethylene glycol pipe; 9. Mixed water supply tank; 10. Mixed liquid pipe; 11. Battery system; 12. Liquid level sensor line; 13. Water pump control line; 14. Exhaust gas emission port; 15. Liquid level sensor; 16. Mixed liquid inlet; 17. Liquid filling port; 18. Liquid filling pipe; 19. Movable latch; 20. Filter; 21. Liquid filling top cover; 22. Movable connecting bolt; 23. Clip; 24. Mixed liquid control pump; 25. No. 2 water inlet; 26. Ethylene glycol inlet; 27. Ethylene glycol injection cover; 28. Ethylene glycol control pump; 29. ​​Liquid inlet pump; 30. Seepage pipe; 31. Exhaust pipe; 32. Connecting ring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Reference Figure 1-6 FIG. 1 is a schematic structural diagram of an automatic coolant replenishing system for a fuel cell system according to an embodiment of the present invention.

[0040] In this embodiment, a fuel cell system coolant automatic replenishment system includes a main water tank 1, the front end outer surface of the main water tank 1 is fixedly connected to a mixed exhaust gas emission pipe 2, the outer surface of one end of the mixed exhaust gas emission pipe 2 is fixedly connected to a water-gas separator 3, the outer wall of the water-gas separator 3 is fixedly connected to a No. 1 water inlet pipe 4, the outer surface of one end of the No. 1 water inlet pipe 4 is fixedly connected to a main water replenishment tank 6, the outer wall of the main water replenishment tank 6 is fixedly connected to a No. 2 water inlet pipe 7, the outer surface of one end of the No. 2 water inlet pipe 7 is fixedly connected to a mixed water replenishment tank 9, the outer wall of the mixed water replenishment tank 9 is fixedly connected to an ethylene glycol pipe 8, the outer surface of one end of the ethylene glycol pipe 8 is fixedly connected to an auxiliary water replenishment tank 5, and the outer wall of the mixed water replenishment tank 9 is fixedly connected to a mixed liquid pipe 10.

[0041] It should be noted that the main water tank 1 is used to replenish coolant to the fuel cell system. When the fuel cell system is running, the mixed exhaust gas is connected to the water-gas separator 3 through the mixed exhaust gas exhaust pipe 2. The separated gaseous water is directly released into the atmosphere, and the liquid water flows to the main water supply tank 6. The auxiliary water supply tank 5 is filled with high-concentration ethylene glycol. The outlets of the main water supply tank 6 and the auxiliary water supply tank 5 are connected to the three-way joint and then merge into the mixed water supply tank 9. The outlet of the mixed water supply tank 9 is connected to the coolant inlet of the main water tank 1 of the fuel cell system.

[0042] In this embodiment, Figure 2 As shown, a liquid level sensor 15 is detachably connected to the outer surface of the upper end of the main water tank 1, a liquid level sensor line 12 is fixedly connected to the outer surface of the upper end of the liquid level sensor 15, a battery system 11 is fixedly connected to the outer surface of one end of the liquid level sensor line 12, and a water pump control line 13 is fixedly connected to the outer surface of the front end of the battery system 11.

[0043] It should be noted that the liquid level sensing line 12 can transmit the water level of each water tank to the battery system 11 respectively, and then control the corresponding smart water pump to be turned on and off through the corresponding water pump control line 13 according to the water level.

[0044] In this embodiment, Figure 3 As shown, the front end outer surface of the main water tank 1 is fixedly connected with an exhaust gas discharge port 14, the upper end outer surface of the main water tank 1 is fixedly connected with a mixed liquid inlet 16, and the upper end outer surface of the main water tank 1 is fixedly connected with a liquid injection port 17.

[0045] It should be noted that the tail gas can be discharged into the water-gas separator 3 through the tail gas discharge port 14 , and liquid can be injected into the main water tank 1 through the liquid injection port 17 .

[0046] In this embodiment, Figure 4 As shown, the outer surface of the upper end of the liquid injection port 17 is fixedly connected to a liquid injection tube 18, the outer wall of the liquid injection tube 18 is fixedly connected to a movable clamping bolt 19, the inner wall of the liquid injection tube 18 is fixedly connected to a filter screen 20, the outer surface of the upper end of the liquid injection tube 18 is movably connected to a liquid injection top cover 21, the outer surface of the lower end of the liquid injection top cover 21 is fixedly connected to a movable connecting bolt 22, and the outer wall of the liquid injection top cover 21 is fixedly connected to a clamping strip 23.

[0047] It should be noted that the liquid filling cover 21 can be opened and closed by snapping the clamping strip 23 into the movable clamping bolt 19 , which makes it convenient to add liquid to the main water tank 1 .

[0048] In this embodiment, Figure 5 As shown, the outer wall of the mixing water supply tank 9 is fixedly connected to a mixed liquid control pump 24, the outer wall of the mixing water supply tank 9 is fixedly connected to a No. 2 water inlet 25, and the outer wall of the mixing water supply tank 9 is fixedly connected to an ethylene glycol inlet 26.

[0049] It should be noted that the mixed liquid control pump 24 can be used to control the mixed water tank 9 to transmit the mixed liquid to the main water tank 1.

[0050] In this embodiment, Figure 6 As shown, the outer surface of the upper end of the auxiliary water supply tank 5 is movably connected to the ethylene glycol injection cap 27, the outer wall of the auxiliary water supply tank 5 is fixedly connected to the ethylene glycol control pump 28, the outer wall of the main water supply tank 6 is fixedly connected to the liquid inlet pump 29, the outer surface of the upper end of the main water supply tank 6 is fixedly connected to the seepage pipe 30, the outer surface of the upper end of the water-gas separator 3 is fixedly connected to the exhaust pipe 31, and the outer wall of the water-gas separator 3 is fixedly connected to the connecting ring 32.

[0051] It should be noted that the seepage pipe 30 can be used to discharge excess liquid water into the atmosphere when the main water supply tank 6 is full of liquid water, and the exhaust pipe 31 can transfer gaseous water in the mixed exhaust gas into the air.

[0052] Therefore, the fuel cell system coolant automatic replenishment system proposed in the present invention can utilize the liquid wastewater generated during the operation of the fuel cell to produce coolant suitable for the operation of the fuel cell system, which will effectively improve the resource utilization rate of the fuel cell system, while improving the system reliability and reducing the difficulty of personnel maintenance.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached figures. Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] 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 quantity of the indicated technical features.

[0055] Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly specified and limited.

[0057] For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.

[0059] Furthermore, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the description of the present invention, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" 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 exemplary expressions of the above terms do not necessarily refer to the same embodiment or example.

[0061] Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

[0063] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A fuel cell system coolant automatic replenishment system, comprising a main water tank, a mixed exhaust gas exhaust pipe is fixedly connected to the outer surface of the front end of the main water tank, a water-gas separator is fixedly connected to the outer surface of one end of the mixed exhaust gas exhaust pipe, a No. 1 water inlet pipe is fixedly connected to the outer wall of the water-gas separator, a main water replenishment tank is fixedly connected to the outer surface of one end of the No. 1 water inlet pipe, a No. 2 water inlet pipe is fixedly connected to the outer surface of the main water replenishment tank, a No. 2 water inlet pipe is fixedly connected to the outer surface of one end of the No. 2 water inlet pipe, a mixed water replenishment tank is fixedly connected to the outer wall of the mixed water replenishment tank, an ethylene glycol pipe is fixedly connected to the outer surface of one end of the ethylene glycol pipe, and a secondary water replenishment tank is fixedly connected to the outer wall of the mixed water replenishment tank. A mixed liquid pipe is fixedly connected to the outer wall of the mixed water replenishment tank.

2. The fuel cell system coolant automatic replenishment system according to claim 1, characterized in that: The outer surface of the upper end of the main water tank is detachably connected with a liquid level sensor, and the outer surface of the upper end of the liquid level sensor is fixedly connected with a liquid level sensing line.

3. The fuel cell system coolant automatic replenishment system according to claim 2, characterized in that: The outer surface of one end of the liquid level sensor line is fixedly connected to a battery system, and the outer surface of the front end of the battery system is fixedly connected to a water pump control line.

4. The fuel cell system coolant automatic replenishment system according to claim 1, characterized in that: The front end outer surface of the main water tank is fixedly connected with an exhaust gas discharge port, the upper end outer surface of the main water tank is fixedly connected with a mixed liquid inlet, and the upper end outer surface of the main water tank is fixedly connected with a liquid injection port.

5. The fuel cell system coolant automatic replenishment system according to claim 4, characterized in that: The outer surface of the upper end of the liquid injection port is fixedly connected with a liquid injection tube, and the outer wall of the liquid injection tube is fixedly connected with a movable clamping bolt.

6. The fuel cell system coolant automatic replenishment system according to claim 4, characterized in that: The inner wall of the liquid injection tube is fixedly connected with a filter screen, the outer surface of the upper end of the liquid injection tube is movably sleeved with a liquid injection top cover, the outer surface of the lower end of the liquid injection top cover is fixedly connected with a movable connecting bolt, and the outer wall of the liquid injection top cover is fixedly connected with a clamping strip.

7. The fuel cell system coolant automatic replenishment system according to claim 1, characterized in that: The outer wall of the mixing water replenishment tank is fixedly connected with a mixed liquid control pump, the outer wall of the mixing water replenishment tank is fixedly connected with a No. 2 water inlet, and the outer wall of the mixing water replenishment tank is fixedly connected with an ethylene glycol inlet.

8. The fuel cell system coolant automatic replenishment system according to claim 1, characterized in that: An ethylene glycol injection cap is movably connected to the outer surface of the upper end of the auxiliary water supply tank, and an ethylene glycol control pump is fixedly connected to the outer wall of the auxiliary water supply tank.

9. The fuel cell system coolant automatic replenishment system according to claim 1, characterized in that: The outer wall of the main water supply tank is fixedly connected with a liquid inlet pump, and the outer surface of the upper end of the main water supply tank is fixedly connected with a seepage pipe.

10. The fuel cell system coolant automatic replenishment system as claimed in claim 1, characterized in that: The outer surface of the upper end of the water-gas separator is fixedly connected with an exhaust pipe, and the outer wall of the water-gas separator is fixedly connected with a connecting ring.

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