A hydrogen fuel cell water storage device, hydrogen fuel cell and vehicle

Abstract

This utility model relates to an auxiliary device for fluid circulation and emission treatment in fuel cells, and more particularly to a water storage device for hydrogen fuel cells, a hydrogen fuel cell, and a vehicle. The water storage device includes a water tank with an inlet connected to the battery drain port of the hydrogen fuel cell to receive and store water generated during fuel cell operation. Antifreeze piping is installed inside the water tank, with a heat exchanger connected between its two ends. The heat exchanger and the antifreeze piping form an antifreeze circulation loop, and a circulation pump is installed on the antifreeze circulation loop. A waste heat piping is connected to the heat exchanger, forming a heating circulation loop. The waste heat piping has a heat medium inlet and a heat medium return outlet for connecting to the vehicle's waste heat source. This utility model utilizes the heat exchange between the vehicle's waste heat and the heat transfer medium to heat the water stored in the water tank, preventing the water from freezing at low temperatures or from being unable to be dealt with promptly after freezing.

Description

Technical Field

[0001] This utility model relates to auxiliary devices for fluid circulation and emission treatment in fuel cells, and more particularly to a hydrogen fuel cell water storage device, a hydrogen fuel cell, and a vehicle. Background Technology

[0002] With the development of new energy vehicles, the research and application of hydrogen fuel cells are also gradually increasing. The working principle of hydrogen fuel cells is to convert the chemical energy in hydrogen into electrical energy through electrochemical reaction under the action of a catalyst, so as to provide electric power for the vehicle. When hydrogen fuel cells are working, they generate a large amount of water, which is discharged with the exhaust gas in liquid or gaseous form. In summer or high temperature environments, this water will evaporate quickly, but in winter or low temperature environments, the gaseous water discharged by hydrogen fuel cells will quickly turn into liquid water when it gets cold. Liquid water will freeze quickly when it gets cold. When it freezes inside the vehicle, it will cause internal vehicle malfunctions. When it freezes outside the vehicle, it will cause road icing, endangering the safety of drivers and pedestrians.

[0003] To address the aforementioned issues, Chinese invention patent CN111082109B, authorized on June 1, 2021, discloses a hydrogen fuel cell vehicle exhaust gas water-gas separation emission system and its control method. This system includes a hydrogen-water-gas mixing pipeline and an air-water-gas mixing pipeline, both connected to the exhaust port of the hydrogen fuel cell stack. Both pipelines are connected to a mixing and emission device, which includes a drain tank and an exhaust tank. The drain tank is connected to an exhaust gas drain pipe, and the exhaust tank is connected to an exhaust gas exhaust pipe. Gases in both pipelines can be discharged through the exhaust gas exhaust pipe, and moisture in both pipelines can be discharged through the drain pipe. A drain valve is installed on the drain pipe, and a heater and temperature sensor are integrated within it. When the temperature sensor detects that the temperature inside the drain valve is below the lower limit, the heater starts working, heating the drain valve and the entire drain pipe to ensure that the drain valve does not freeze in low temperatures and can function normally.

[0004] The above solution only heats the drain valve and exhaust drain pipe to prevent freezing. However, in low-temperature weather, the water stored in the drain tank of the mixed exhaust device may also freeze in some scenarios. The heating pipe inside the drain valve cannot heat the water in the drain tank, causing the water to freeze and preventing it from being drained. In addition, when the water in the drain tank freezes, it can easily cause vehicle malfunctions. Utility Model Content

[0005] The purpose of this invention is to provide a water storage device for hydrogen fuel cells, aiming to solve the problem of vehicle malfunctions caused by ice buildup in the drain tank of existing automotive exhaust water-gas separation emission systems. Furthermore, this invention also aims to provide a hydrogen fuel cell and vehicle using the aforementioned water storage device.

[0006] To achieve the above objectives, the hydrogen fuel cell water storage device of this utility model adopts the following technical solution:

[0007] A hydrogen fuel cell water storage device includes a water tank with an inlet for receiving and storing water generated during the operation of the hydrogen fuel cell, connected to the battery drain outlet of the hydrogen fuel cell. An antifreeze pipeline is installed inside the water tank, and a heat exchanger is connected between the two ends of the antifreeze pipeline. The heat exchanger and the antifreeze pipeline form an antifreeze circulation loop. A circulation pump is installed on the antifreeze circulation loop. A waste heat pipeline is also connected to the heat exchanger, forming a heating circulation loop together. The waste heat pipeline has a heat medium inlet and a heat medium return outlet for connecting to a waste heat source from a vehicle.

[0008] Furthermore, the antifreeze pipeline is equipped with heat transfer fins to improve the heat exchange efficiency between the circulating medium in the antifreeze pipeline and the stored water in the water tank.

[0009] Furthermore, the portion of the antifreeze pipeline inside the water storage tank is provided with a bend to increase the heat exchange distance between the antifreeze pipeline and the stored water in the water storage tank.

[0010] Furthermore, the waste heat source is waste heat from the hydrogen fuel cell, and the heat medium inlet and heat medium return port are connected to the water outlet and water inlet of the hydrogen fuel cell, respectively.

[0011] Furthermore, the waste heat source is waste heat from air conditioning water heating, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the air conditioning water heating system, respectively.

[0012] Furthermore, the waste heat source is the waste heat from the motor, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the waste heat from the motor, respectively.

[0013] Furthermore, the outside of the water storage tank is covered with an insulation layer.

[0014] Furthermore, an electric drain valve is connected to the bottom of the water storage tank.

[0015] Beneficial Effects: This utility model's hydrogen fuel cell water storage device is an improved invention. By laying antifreeze pipes inside the water tank and waste heat pipes outside, the heat exchanger is simultaneously connected to both the waste heat pipes and the antifreeze pipes. The heat exchanger and antifreeze pipes form an antifreeze circulation loop. A circulation pump is installed within the antifreeze circulation loop, allowing for adjustments to the flow rate and velocity of the circulating medium according to specific heat exchange requirements. The heat exchanger and waste heat pipes form a heating circulation loop. The heat medium from the vehicle's waste heat source flows into the waste heat pipe through its inlet and circulates back through its return outlet, allowing the heating circulation loop to absorb the vehicle's waste heat source through the heat medium. The system heats up and then exchanges heat with the antifreeze circulation loop. The heat from the heating loop is absorbed by the antifreeze circulation loop, which then transfers the absorbed heat to the water stored in the tank through the antifreeze pipe. This heats the water in the tank, preventing it from freezing at low temperatures, or melting any ice that forms if the tank does freeze. This novel hydrogen fuel cell water storage device utilizes the vehicle's waste heat to heat the water in the tank, saving energy and protecting the environment. It also prevents vehicle malfunctions caused by the water freezing at low temperatures, thus ensuring usability.

[0016] The hydrogen fuel cell of this utility model adopts the following technical solution:

[0017] A hydrogen fuel cell includes a reactor stack and a hydrogen fuel cell water storage device. The water storage device includes a water tank with an inlet for receiving and storing water generated during the operation of the hydrogen fuel cell, connected to the battery drain port of the hydrogen fuel cell. Antifreeze piping is installed inside the water tank, and a heat exchanger is connected between the two ends of the antifreeze piping. The heat exchanger and the antifreeze piping form an antifreeze circulation loop. A circulation pump is installed on the antifreeze circulation loop. A waste heat piping is also connected to the heat exchanger, forming a heating circulation loop together. The waste heat piping has a heat medium inlet and a heat medium return outlet for connecting to a waste heat source from the vehicle.

[0018] Furthermore, the antifreeze pipeline is equipped with heat transfer fins to improve the heat exchange efficiency between the circulating medium in the antifreeze pipeline and the stored water in the water tank.

[0019] Furthermore, the portion of the antifreeze pipeline inside the water storage tank is provided with a bend to increase the heat exchange distance between the antifreeze pipeline and the stored water in the water storage tank.

[0020] Furthermore, the waste heat source is waste heat from the hydrogen fuel cell, and the heat medium inlet and heat medium return port are connected to the water outlet and water inlet of the hydrogen fuel cell, respectively.

[0021] Furthermore, the waste heat source is waste heat from air conditioning water heating, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the air conditioning water heating system, respectively.

[0022] Furthermore, the waste heat source is the waste heat from the motor, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the waste heat from the motor, respectively.

[0023] Furthermore, the outside of the water storage tank is covered with an insulation layer.

[0024] Furthermore, an electric drain valve is connected to the bottom of the water storage tank.

[0025] Beneficial Effects: This utility model's hydrogen fuel cell is an improved invention. By laying antifreeze pipes inside the water storage tank and waste heat pipes outside the tank, the heat exchanger is simultaneously connected to both the waste heat pipes and the antifreeze pipes. The heat exchanger and antifreeze pipes form an antifreeze circulation loop. A circulation pump is installed within the antifreeze circulation loop, allowing for adjustments to the flow rate and velocity of the circulating medium according to specific heat exchange requirements. The heat exchanger and waste heat pipes form a heating circulation loop. The heat medium from the vehicle's waste heat source flows into the waste heat pipe through its inlet and circulates back through its return outlet. This allows the heating circulation loop to absorb the vehicle's waste heat through the heat medium. The heat source heats the water, which then exchanges heat with the antifreeze circulation loop. The heat from the heating loop is absorbed by the antifreeze circulation loop, which in turn transfers the heat to the water stored in the tank through the antifreeze pipes. This heats the water in the tank, preventing it from freezing at low temperatures or melting any ice that forms. The hydrogen fuel cell water storage device utilizes the vehicle's waste heat to heat the water in the tank, saving energy and protecting the environment. It also prevents vehicle malfunctions caused by the water freezing at low temperatures, thus avoiding disruption to vehicle use.

[0026] The vehicle of this utility model adopts the following technical solution:

[0027] The vehicle includes a hydrogen fuel cell, which comprises a reactor stack and a hydrogen fuel cell water storage device. The water storage device includes a water tank with an inlet for receiving and storing water generated during the operation of the hydrogen fuel cell, connected to the battery drain port of the hydrogen fuel cell. Antifreeze piping is installed inside the water tank, and a heat exchanger is connected between the two ends of the antifreeze piping. The heat exchanger and the antifreeze piping form an antifreeze circulation loop. A circulation pump is installed on the antifreeze circulation loop. A waste heat piping is also connected to the heat exchanger, forming a heating circulation loop together. The waste heat piping has a heat medium inlet and a heat medium return outlet for connecting to the vehicle's waste heat source.

[0028] Furthermore, the antifreeze pipeline is equipped with heat transfer fins to improve the heat exchange efficiency between the circulating medium in the antifreeze pipeline and the stored water in the water tank.

[0029] Furthermore, the portion of the antifreeze pipeline inside the water storage tank is provided with a bend to increase the heat exchange distance between the antifreeze pipeline and the stored water in the water storage tank.

[0030] Furthermore, the waste heat source is waste heat from the hydrogen fuel cell, and the heat medium inlet and heat medium return port are connected to the water outlet and water inlet of the hydrogen fuel cell, respectively.

[0031] Furthermore, the waste heat source is waste heat from air conditioning water heating, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the air conditioning water heating system, respectively.

[0032] Furthermore, the waste heat source is the waste heat from the motor, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the waste heat from the motor, respectively.

[0033] Furthermore, the outside of the water storage tank is covered with an insulation layer.

[0034] Furthermore, an electric drain valve is connected to the bottom of the water storage tank.

[0035] Beneficial Effects: This utility model represents an improved invention. By installing antifreeze piping inside the water tank and waste heat piping outside, the heat exchanger is simultaneously connected to both the waste heat piping and the antifreeze piping. The heat exchanger and antifreeze piping form an antifreeze circulation loop, which includes a circulation pump. The flow rate and speed of the circulating medium within the antifreeze circulation loop can be adjusted according to specific heat exchange requirements. The heat exchanger and waste heat piping form a heating circulation loop. The heat medium from the vehicle's waste heat source flows into the waste heat piping through the heat medium inlet and circulates back through the heat medium return port. This allows the heating circulation loop to absorb the vehicle's waste heat through the heat medium. The heat source heats the water, which then exchanges heat with the antifreeze circulation loop. The heat from the heating loop is absorbed by the antifreeze circulation loop, which in turn transfers the heat to the water stored in the tank through the antifreeze pipes. This heats the water in the tank, preventing it from freezing at low temperatures or melting any ice that forms. The hydrogen fuel cell water storage device utilizes the vehicle's waste heat to heat the water in the tank, saving energy and protecting the environment. It also prevents vehicle malfunctions caused by the water freezing at low temperatures, thus avoiding disruption to vehicle use. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the connection structure when the hydrogen fuel cell water storage device of this utility model is connected to the water-gas separation component in one embodiment.

[0037] Figure 2 This is a schematic diagram of the antifreeze pipeline inside the water storage tank in one embodiment of the hydrogen fuel cell water storage device of this utility model.

[0038] In the diagram: 1. Water storage tank; 2. Hydrogen fuel cell; 3. Drain outlet; 4. Water inlet; 5. Antifreeze piping; 6. Heat exchanger; 7. Antifreeze circulation loop; 8. Circulation pump; 9. Waste heat piping; 10. Heat medium inlet; 11. Heat medium return outlet; 12. Heat transfer fins; 13. Bend section; 14. Electric drain valve; 15. Water-gas separation assembly. Detailed Implementation

[0039] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0040] During the application of hydrogen fuel cells, a large amount of water is generated. Existing hydrogen fuel cell vehicles have a drain tank in their exhaust water-gas separation emission system. The water generated by the hydrogen fuel cell can be stored in the drain tank and discharged through it. However, in winter or low-temperature environments, the water in the drain tank is prone to freezing, which can cause vehicle malfunctions. The existing system only heats the exhaust drain pipe to prevent it from freezing, but does not heat the water in the drain tank. As a result, the water in the drain tank freezes at low temperatures and is difficult to discharge. To prevent the water in the drain tank from freezing or becoming abnormally frozen and unable to be discharged, an antifreeze pipeline can be installed inside the drain tank, and a waste heat pipeline connected to the vehicle's waste heat source can be installed outside the drain tank. The antifreeze pipeline and the waste heat pipeline can be combined and exchanged through a heat exchanger. The waste heat of the vehicle can be used to heat the water in the drain tank, preventing the water from freezing or becoming abnormally frozen and allowing it to be discharged by heating and melting the ice. Based on the above utility model concept, this utility model proposes a hydrogen fuel cell water storage device, a hydrogen fuel cell, and a vehicle. By laying antifreeze pipelines inside the water storage tank and waste heat pipelines outside the water storage tank, and installing a heat exchanger, the heat exchanger is connected to both the waste heat pipelines and the antifreeze pipelines. The water in the water storage tank is heated through heat exchange between the waste heat pipelines and the antifreeze pipelines, thus preventing the water in the water storage tank from freezing in low-temperature environments.

[0041] The embodiments of the hydrogen fuel cell water storage device of this utility model are as follows:

[0042] See Figures 1 to 2As a basic embodiment of this utility model, the hydrogen fuel cell water storage device includes a water tank 1. The water tank 1 has an inlet 4 for connecting to the battery drain outlet 3 of the hydrogen fuel cell 2 to receive and store the water generated by the operation of the hydrogen fuel cell 2. An antifreeze pipeline 5 is installed inside the water tank 1. A heat exchanger 6 is connected between the two ends of the antifreeze pipeline 5, forming an antifreeze circulation loop 7. A circulation pump 8 is installed on the antifreeze circulation loop 7, which can adjust the flow rate and volume of the circulating medium in the antifreeze circulation loop 7 according to specific heat exchange requirements. A waste heat pipeline 9 is also connected to the heat exchanger 6, forming a heating circulation loop together with the heat exchanger 6. The waste heat pipeline 9 is equipped with a heat medium inlet 10 and a heat medium return outlet 11 for connecting to the vehicle's waste heat source. The heat medium from the vehicle's waste heat source flows into the waste heat pipe 9 through the heat medium inlet 10 and circulates back through the heat medium return port 11. This allows the heating circulation loop to absorb the vehicle's waste heat source and raise its temperature. Subsequently, it exchanges heat with the antifreeze circulation loop 7. At this time, the heat from the heating circulation loop is absorbed by the antifreeze circulation loop 7, and the heat absorbed by the antifreeze circulation loop 7 is then transferred to the water stored in the water tank 1 through the antifreeze pipe 5. This achieves the heating of the water stored in the water tank 1, preventing the water in the water tank 1 from freezing at low temperatures or, if it freezes abnormally, melting and discharging the ice. The hydrogen fuel cell water storage device of this utility model can use the vehicle's waste heat to heat the water stored in the water tank 1, which is energy-saving and environmentally friendly, and avoids the water stored in the water tank 1 freezing at low temperatures, thus preventing it from affecting use.

[0043] In the basic embodiment, heat exchanger 6 is configured as a plate heat exchanger. The plate heat exchanger has two independent medium flow channels, which respectively form part of the heating circulation loop and part of the antifreeze circulation loop 7. In this embodiment, antifreeze coolant is used as the heat medium in the heating circulation loop, and circulating water is used as the circulating medium in the antifreeze circulation loop 7. The antifreeze coolant has a high boiling point and a low freezing point, and will not easily freeze at low temperatures or boil at high temperatures. The antifreeze coolant in the heating circulation loop can absorb the temperature of the vehicle's waste heat source and raise its own temperature. The heat is then transferred to the circulating water in the antifreeze circulation loop 7, raising its temperature. The heated circulating water then flows along the antifreeze circulation loop 7 to the antifreeze pipe 5 in the water storage tank 1. The heat from the circulating water is then transferred to the stored water in the water storage tank 1 through the antifreeze pipe 5, thus preventing the stored water in the water storage tank 1 from freezing at low temperatures. This invention utilizes the heat from the vehicle's waste heat source and the heat exchange between the heat transfer medium to prevent the water stored in the water storage tank 1 from freezing at low temperatures, thus avoiding vehicle malfunctions. In other embodiments, the heat exchanger 6 can also be any other type of heat exchanger, such as a shell-and-tube heat exchanger, a rotary heat exchanger, or a heat pipe heat exchanger, all of which can achieve heat exchange between the heat medium and the circulating medium.

[0044] In a preferred embodiment of this invention, heat transfer fins 12 are provided on the antifreeze pipe 5 to improve the heat exchange efficiency between the circulating medium in the antifreeze pipe 5 and the stored water in the water tank 1. When the antifreeze coolant, which has absorbed the waste heat of the vehicle, transfers heat to the circulating water through the heat exchanger 6, the temperature of the circulating water rises and flows into the antifreeze pipe 5. Heat exchange between the circulating water in the antifreeze pipe 5 and the stored water in the water tank 1 can be achieved through the antifreeze pipe 5. At this time, the heat transfer fins 12 are provided on the outside of the antifreeze pipe 5, which can further improve the heat transfer rate between the circulating water in the antifreeze pipe 5 and the stored water in the water tank 1, resulting in better antifreeze and defrosting effects. In other embodiments, heat pipes can also be provided on the antifreeze pipe 5 to transfer the heat of the circulating water in the antifreeze pipe 5 to the stored water in the water tank 1. The heat pipes also have a high heat transfer rate, enabling rapid heat transfer.

[0045] In a preferred embodiment of this utility model, the heat transfer fins 12 are arranged along the length of the antifreeze pipe 5 and welded to the antifreeze pipe 5. This arrangement can improve the connection reliability between the heat transfer fins 12 and the antifreeze pipe 5, avoid the heat transfer fins 12 from loosening or falling off and causing failure, and the heat transfer fins 12 can increase the contact area with the stored water in the water tank 1, thereby improving the heat conduction rate. Arranging the heat transfer fins 12 along the length of the antifreeze pipe 5 can enable multiple heat transfer fins 12 to conduct heat together, thereby improving the heat conduction efficiency.

[0046] In a preferred embodiment of this utility model, the antifreeze pipe 5 has a curved section 13 on the portion inside the water storage tank 1 to increase the heat exchange distance between the antifreeze pipe 5 and the stored water in the water storage tank 1. The curved section 13 can extend the flow path of the circulating water in the antifreeze pipe 5 and effectively reduce the flow speed of the circulating water, allowing the circulating water to move slowly and uniformly along the antifreeze pipe 5. This increases the contact time between the circulating water and the pipe wall of the antifreeze pipe 5, thus enabling complete heat conduction of the circulating water in the antifreeze pipe 5 and reducing heat loss. In this embodiment, the curved section 13 is set as a spiral. When the circulating water flows to the spiral curved section, the flow speed will decrease, and the heat conduction time will increase, thereby heating the stored water in the water storage tank 1. In other embodiments, the curved section 13 can also be set as a wave shape or an S-shape. The more bends in the antifreeze pipe 5, the slower the flow speed of the circulating water, and the more complete the heat conduction.

[0047] In a preferred embodiment of this utility model, the waste heat source is the waste heat of the hydrogen fuel cell 2. The heat medium inlet 10 and the heat medium return port 11 are connected to the outlet and inlet of the hydrogen fuel cell 2, respectively. The waste heat generated when the hydrogen fuel cell 2 is working is transferred to the heat medium through the heat medium inlet 10 and the heat medium return port 11 connected to its outlet and inlet. The heat medium is the aforementioned antifreeze coolant. The antifreeze coolant absorbs the waste heat generated when the hydrogen fuel cell 2 is working. At this time, the temperature of the antifreeze coolant can reach 70℃-80℃. Moreover, the antifreeze coolant has a high boiling point and a low freezing point. The antifreeze coolant that has absorbed the waste heat of the hydrogen fuel cell 2 will flow in the heating circulation loop and transfer the heat to the circulating medium in the antifreeze circulation loop 7, which is the aforementioned circulating water. At this time, the temperature of the antifreeze coolant decreases and the temperature of the circulating water increases. Then, the antifreeze coolant flows back along the heat medium return port 11 and absorbs the waste heat of the hydrogen fuel cell 2 again, causing the temperature of the antifreeze coolant to rise again and continue to exchange heat with the circulating water in the antifreeze circulation loop 7. This cycle repeats to complete the heat transfer.

[0048] In a preferred embodiment of this utility model, the waste heat source is the waste heat from the air conditioning water heating system. The heat medium inlet 10 and the heat medium return port 11 are connected to the outlet and inlet of the air conditioning water heating system, respectively. In this embodiment, the antifreeze coolant absorbs the waste heat from the air conditioning water heating system and transfers the heat to the circulating water in the antifreeze circulation loop 7. The heat transfer is completed through repeated cycles. The thawing and antifreezing of the stored water in the water storage tank 1 are achieved through heat exchange, which effectively prevents the stored water in the water storage tank 1 from freezing in winter and low temperature environments.

[0049] In a preferred embodiment of this utility model, the waste heat source is the waste heat of the motor. The heat medium inlet 10 and the heat medium return port 11 are connected to the outlet and inlet of the waste heat of the motor, respectively. In this embodiment, the antifreeze coolant absorbs the waste heat of the motor and transfers the heat to the circulating water in the antifreeze circulation loop 7. The heat transfer is completed through repeated circulation. The thawing and antifreeze of the stored water in the water tank 1 are achieved through heat exchange, which effectively prevents the stored water in the water tank 1 from freezing in winter and low temperature environment, or from heating and melting the ice to discharge it when it freezes abnormally.

[0050] In a preferred embodiment of this utility model, the outer side of the water storage tank 1 is covered with an insulation layer. The insulation layer can concentrate the heat inside the water storage tank 1 and prevent the heat from dissipating quickly. This arrangement can improve the insulation effect of the water storage tank 1.

[0051] In a preferred embodiment of this utility model, an electric drain valve 14 is connected to the bottom of the water storage tank 1. When the electric drain valve 14 is closed, the water storage tank 1 can store a certain amount of water. When the water stored in the water storage tank 1 reaches the maximum amount, the electric drain valve 14 is opened to drain the stored water in the water storage tank 1. Alternatively, the water in the water storage tank 1 can be drained periodically at fixed points.

[0052] The working process of the hydrogen fuel cell water storage device of this utility model is as follows: In winter or low temperature environment, the heat from the vehicle's waste heat source is absorbed by the antifreeze coolant, the temperature of the antifreeze coolant rises and flows along the heating circulation loop, transferring its own heat to the circulating water in the antifreeze circulation pipe. At this time, the temperature of the antifreeze coolant decreases and the temperature of the circulating water rises. Subsequently, the circulating water in the antifreeze circulation pipe flows into the antifreeze pipe 5, and the heat is transferred to the stored water in the water tank 1 through the heat transfer fins 12 on the outside of the antifreeze pipe 5. At this time, the temperature of the circulating water in the antifreeze pipe 5 decreases and the temperature of the stored water in the water tank 1 rises. This cycle repeats, thereby heating the stored water in the water tank 1 and effectively preventing the stored water in the water tank 1 from freezing.

[0053] Embodiments of the hydrogen fuel cell 2 of this utility model:

[0054] The hydrogen fuel cell 2 includes a reactor stack, which is connected to a water-gas separation component 15. The hydrogen fuel cell 2 also includes the aforementioned hydrogen fuel cell water storage device, the specific structure of which will not be described in detail here. The connection between the hydrogen fuel cell water storage device and the hydrogen fuel cell 2 can be achieved by connecting the water storage tank 1 and the water-gas separation component 15. By connecting the water storage tank 1 and the water-gas separation component 15, the water separated by the water-gas separation component 15 can be directly stored in the water storage tank 1. Then, through the heat exchanger 6 in the aforementioned hydrogen fuel cell water storage device, the waste heat pipeline 9 and the antifreeze pipeline 5 work together to exchange heat using the heat generated by the reactor stack reaction. This allows the stored water in the water storage tank 1 to be heated in winter or low-temperature environments, preventing freezing or melting and discharging the ice in case of abnormal freezing.

[0055] The implementation method of the vehicle of this utility model:

[0056] The vehicle includes the aforementioned hydrogen fuel cell 2, which is connected to the aforementioned hydrogen fuel cell water storage device. By cooperating with the hydrogen fuel cell water storage device, the freezing of the water tank 1 in winter or low-temperature environments can be avoided.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A water storage device for a hydrogen fuel cell, comprising a water storage tank having a water inlet for connecting to a cell drain port of a hydrogen fuel cell to receive and store water produced by operation of the hydrogen fuel cell, characterised in that: The water storage tank is equipped with antifreeze pipes, and a heat exchanger is connected between the two ends of the antifreeze pipes. The heat exchanger and the antifreeze pipes are connected to form an antifreeze circulation loop. A circulation pump is installed on the antifreeze circulation loop. A waste heat pipe is also connected to the heat exchanger. The waste heat pipe and the heat exchanger together form a heating circulation loop. The waste heat pipe is equipped with a heat medium inlet and a heat medium return port for connecting the vehicle's waste heat source.

2. The hydrogen fuel cell water storage device of claim 1, wherein: The antifreeze pipeline is equipped with heat transfer fins to improve the heat exchange efficiency between the circulating medium in the antifreeze pipeline and the stored water in the water tank.

3. The hydrogen fuel cell water storage device of claim 2, wherein: The antifreeze pipeline has a curved section inside the water storage tank to increase the heat exchange distance between the antifreeze pipeline and the stored water in the water storage tank.

4. The hydrogen fuel cell water storage device of claim 1 or 2 or 3, wherein: The waste heat source is waste heat from the hydrogen fuel cell, and the heat medium inlet and heat medium return port are connected to the water outlet and water inlet of the hydrogen fuel cell, respectively.

5. The hydrogen fuel cell water storage device of claim 1 or 2 or 3, wherein: The waste heat source is waste heat from air conditioning water heating, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the air conditioning water heating, respectively.

6. The hydrogen fuel cell water storage device of claim 1 or 2 or 3, wherein: The waste heat source is the waste heat from the motor, and the heat medium inlet and heat medium return port are connected to the outlet and inlet of the waste heat from the motor, respectively.

7. The hydrogen fuel cell water storage device of claim 1, wherein: The water storage tank is covered with an insulation layer on the outside.

8. The hydrogen fuel cell water storage device of claim 7, wherein: An electric drain valve is connected to the bottom of the water storage tank.

9. A hydrogen fuel cell comprising a reaction stack, characterised in that: It also includes the hydrogen fuel cell water storage device according to any one of claims 1-8.

10. Vehicle, characterized in that: Including the hydrogen fuel cell described in claim 9.

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