Fuel cell, heat dissipation system, heat dissipation control method and application thereof

Abstract

The present application relates to the field of fuel cell heat dissipation technology. A fuel cell, a heat dissipation system, a heat dissipation control method, and their applications are disclosed. The invention comprises a battery stack and a heat dissipation device. The battery stack comprises a plurality of stacked electrode plates. A heat dissipation channel is formed in the battery stack. The heat dissipation device comprises a mixing chamber. The heat dissipation channel is connected to the mixing chamber. The heat dissipation channel and the mixing chamber are filled with a cooling medium. The mixing chamber mixes the cooling medium in the heat dissipation channel with the cooling medium in the mixing chamber for heat exchange. Compared with the prior art, the invention can effectively reduce the overall volume of the fuel cell, improve the convenience and versatility of use, and effectively improve the utilization rate of electric energy without adding additional power-consuming heat dissipation devices.

Description

Technical Field

[0001] The present application relates to the field of fuel cell heat dissipation technology, and more specifically, to a fuel cell, a heat dissipation system, a heat dissipation control method, and applications thereof. Background Art

[0002] The fuel cell system needs to dissipate heat when it is working. Most cooling systems use external radiators, cooling fans and driven water pumps. For example, the driven water pump pumps the coolant into the entire fuel cell system, absorbs the reaction heat of the fuel cell, and then pumps it into the external radiator. The cooling fan is used to dissipate the reaction heat from the coolant, thereby meeting the heat dissipation requirements of the fuel cell system. This type of heat dissipation structure consumes a portion of the fuel cell's electrical energy as a power source to drive the overall cooling system. This also leads to a reduction in the available power generation of the fuel cell, which also leads to a low fuel cell power utilization rate. In order to compensate for this part of the power loss, it is often necessary to increase the size of the plate, resulting in a larger size of the fuel cell itself. In addition, a larger space is required to assemble cooling systems such as cooling fans and water pumps, further increasing the size of the fuel cell and reducing the versatility of fuel cell use. Summary of the Invention

[0003] In order to solve the technical problems of low power utilization and large size of existing fuel cells, the main purpose of this application is to provide a fuel cell, a heat dissipation system, a heat dissipation control method and its application that can effectively improve power utilization and have a smaller size.

[0004] To achieve the above-mentioned invention objectives, this application adopts the following technical solutions:

[0005] According to one aspect of the present application, a fuel cell is provided, comprising a cell stack and a heat dissipation device, wherein the cell stack comprises a plurality of stacked electrode plates, a heat dissipation channel is formed in the cell stack, the heat dissipation device comprises a mixing chamber, the heat dissipation channel is connected to the mixing chamber, the heat dissipation channel and the mixing chamber are filled with a cooling medium, and the mixing chamber mixes the cooling medium in the heat dissipation channel with the cooling medium in the mixing chamber for heat exchange.

[0006] According to one embodiment of the present application, the mixing chamber further comprises a heat exchange wall, the heat exchange wall is attached to the external medium, and the mixing chamber dissipates heat to the external medium through the heat exchange wall.

[0007] According to one embodiment of the present application, a spoiler and / or a flow guide are further provided in the mixing chamber.

[0008] According to one embodiment of the present application, the spoiler includes a flexible component and a stirring component, the flexible component is assembled in the mixing chamber, and the stirring component can swing along the flexible component to drive the cooling medium to flow in the mixing chamber and the heat dissipation channel.

[0009] According to one embodiment of the present application, the guide member is a guide plate, and the guide plate is arranged at an angle in the mixing chamber.

[0010] According to an embodiment of the present application, the mixing chamber is located on a side of the battery stack facing the external medium.

[0011] According to one embodiment of the present application, the mixing chamber is located on the upper side of the battery stack.

[0012] According to one embodiment of the present application, a heat exchange chamber is further included, and the heat exchange chamber is attached to the mixing chamber, and the heat exchange chamber and the mixing chamber can exchange heat.

[0013] According to one embodiment of the present application, the heat exchange cavity includes a liquid inlet, and the external medium can be filled into the heat exchange cavity through the liquid inlet.

[0014] According to another aspect of the present application, a fuel cell heat dissipation system is provided, comprising a fuel cell and a mixing chamber, wherein the fuel cell has a heat dissipation channel, the mixing chamber is connected to the heat dissipation channel, the heat dissipation channel and the mixing chamber are filled with a cooling medium, and the mixing chamber mixes the cooling medium in the heat dissipation channel with the cooling medium in the mixing chamber for heat exchange.

[0015] According to one embodiment of the present application, a heat exchange chamber is further included, and the heat exchange chamber is attached to the mixing chamber, and the heat exchange chamber and the mixing chamber can exchange heat.

[0016] According to one embodiment of the present application, the heat exchange cavity includes a liquid inlet, and the external medium can be filled into the heat exchange cavity through the liquid inlet.

[0017] According to one embodiment of the present application, a control component is further included, and the control component can control the filling volume of the external medium in the heat exchange chamber to change the heat exchange coefficient between the heat exchange chamber and the mixing chamber.

[0018] According to another aspect of the present application, a fuel cell heat dissipation control method is provided, comprising the following steps:

[0019] Start the machine and run the preheating time, and check the fuel cell temperature and compare it with the preset temperature threshold;

[0020] If the temperature of the fuel cell is higher than a preset temperature threshold, the cooling system is activated;

[0021] If the temperature of the fuel cell is lower than a preset temperature threshold, the cooling system is shut down.

[0022] According to one embodiment of the present application, if the temperature of the fuel cell is lower than a preset temperature threshold, shutting down the heat dissipation system includes:

[0023] The preset temperature threshold includes a plurality of preset temperature zones, and the heat dissipation system can control the volume of the external medium entering the heat exchange chamber corresponding to different preset temperature zones.

[0024] According to another aspect of the present application, a fuel cell for a ship is provided, comprising the fuel cell heat dissipation control method.

[0025] As can be seen from the above technical solutions, the advantages and positive effects of the fuel cell, heat dissipation system, heat dissipation control method and their applications of the present application are:

[0026] By arranging a heat dissipation device on one side of the battery stack, connecting it with the heat dissipation channel through a mixing chamber, and mixing the cooling medium in the heat dissipation channel and the cooling medium in the mixing chamber through the mixing chamber, the cooling medium with a higher temperature at the electrode plate can be mixed with the cooling medium with a lower temperature in the mixing chamber. There is no need to rely on external power-consuming heat dissipation devices to circulate the cooling medium in the fuel cell, which effectively improves the power utilization rate of the fuel cell, reduces the volume of the fuel cell, and improves the versatility and convenience of using the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0029] Figure 1 FIG. 1 is a schematic cross-sectional view of an overall structure of a fuel cell according to an exemplary embodiment.

[0030] Figure 2 FIG. 1 is another schematic diagram of the overall structure of a fuel cell according to an exemplary embodiment.

[0031] Figure 3 FIG. 1 is another schematic diagram of the overall structure of a fuel cell according to an exemplary embodiment.

[0032] Figure 4FIG. 1 is another schematic diagram of the overall structure of a fuel cell according to an exemplary embodiment.

[0033] Figure 5 FIG1 is a schematic structural diagram of a heat exchange wall of a fuel cell according to an exemplary embodiment.

[0034] The description of the accompanying drawings is as follows:

[0035] 1. Battery stack; 101. Plate; 102. Heat dissipation channel; 2. Mixing chamber; 201. Heat exchange wall; 3. Cooling medium; 4. Baffle; 401. Flexible component; 402. Stirring component; 5. Flow guide; 6. Heat exchange chamber; 601. Liquid inlet. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] In the prior art, heat dissipation of fuel cells is often achieved by adding an external, power-consuming heat sink to disturb the cooling medium within the fuel cell, thereby improving the cooling medium's circulation efficiency. However, this heat dissipation method consumes a portion of the fuel cell's electrical energy, resulting in reduced fuel cell power utilization. Furthermore, the large number of external heat sinks and the fixed connections between the heat sinks increase the overall fuel cell volume, reducing the fuel cell's versatility in use. Therefore, the present application proposes providing a heat sink on one side of the cell stack 1, communicating with the heat dissipation channel 102 via a mixing chamber 2. The mixing chamber 2 mixes the cooling medium 3 within the heat dissipation channel 102 with the cooling medium 3 within the mixing chamber 2. This allows the higher-temperature cooling medium 3 at the electrode plate 101 to be mixed with the lower-temperature cooling medium 3 within the mixing chamber 2. This eliminates the need for external, power-consuming heat sinks to circulate the cooling medium 3 within the fuel cell, effectively improving the fuel cell's power utilization, reducing the fuel cell's volume, and enhancing the versatility and convenience of fuel cell use.

[0038] refer to Figure 1-5As shown, according to one aspect of the present application, a fuel cell is provided, including a battery stack 1 and a heat dissipation device, the battery stack 1 including a plurality of stacked electrode plates 101, a heat dissipation channel 102 formed in the battery stack 1, the heat dissipation device including a mixing chamber 2, the heat dissipation channel 102 being connected to the mixing chamber 2, the heat dissipation channel 102 and the mixing chamber 2 being filled with a cooling medium 3, and the mixing chamber 2 mixing the cooling medium 3 in the heat dissipation channel 102 with the cooling medium 3 in the mixing chamber 2 for heat exchange.

[0039] As an example, the mixing chamber 2 includes multiple heat dissipation chambers, and the multiple heat dissipation chambers are interconnected. Preferably, they include at least a first heat dissipation chamber, a second heat dissipation chamber and a third heat dissipation chamber. The first heat dissipation chamber and the second heat dissipation chamber are respectively arranged on both sides of the heat dissipation channel 102, and the third heat dissipation chamber is arranged at an angle to the first heat dissipation chamber and the second heat dissipation chamber, thereby increasing the contact area between the heat dissipation channel 102 and the cooling medium 3 in the mixing chamber 2. During heat exchange, the first heat dissipation chamber and the second heat dissipation chamber respectively form heat exchange channels with the heat dissipation channel 102, thereby performing preliminary heat exchange, improving the heat exchange efficiency and realizing rapid heat dissipation.

[0040] The first heat dissipation cavity and the second heat dissipation cavity may be perpendicular to the heat dissipation channel 102 , that is, vertically arranged on both sides of the electrode plate 101 , so as to reduce the flow path of the cooling medium 3 and thereby improve the heat exchange efficiency.

[0041] The fuel cell can be attached to the surface of the device to be powered, so that a heat exchange channel is formed between the first heat dissipation cavity and the second heat dissipation cavity and the device to be powered, thereby quickly transferring the heat of the cooling medium 3 and cooling the cooling medium 3.

[0042] According to one embodiment of the present application, the mixing chamber 2 further comprises a heat exchange wall 201 , wherein the heat exchange wall 201 is attached to the external medium, and the mixing chamber 2 dissipates heat to the external medium through the heat exchange wall 201 .

[0043] The heat exchange wall 201 of the mixing chamber 2 can surround the battery stack 1, so that the cooling medium 3 inside the fuel cell can transfer heat to the external medium through the heat exchange wall 201. Preferably, the heat transfer coefficient of the heat exchange wall 201 is greater than the thermal conductivity coefficient of the cooling medium 3 and the external medium, thereby improving the heat exchange efficiency.

[0044] According to one embodiment of the present application, a spoiler 4 and / or a flow guide 5 are further provided in the mixing chamber 2. The spoiler 4 or the flow guide 5 can increase the disturbance of the cooling medium 3 in the mixing chamber 2, so that the cooling medium 3 with a higher temperature in the heat dissipation channel 102 mixes with the cooling medium 3 with a lower temperature in the mixing chamber 2 during heat exchange. The spoiler 4 or the flow guide 5 increases the disturbance of the mixing process, thereby improving the heat exchange of the cooling medium 3 with a temperature difference.

[0045] As an example, the spoiler 4 or the guide 5 can be configured as a guide plate facing the heat dissipation channel 102 in the mixing chamber 2. The guide plate can be configured as an arc structure or a wavy structure to increase the turbulence of the mixing chamber 2. Multiple guide plates can also be provided, so that the multiple guide plates are arranged at an angle in the mixing chamber 2 to increase the turbulence in the mixing chamber 2 at different angles and directions.

[0046] According to one embodiment of the present application, the spoiler 4 includes a flexible component 401 and a stirring component 402. The flexible component 401 is assembled in the mixing chamber 2, and the stirring component 402 can swing along the flexible component 401 to drive the cooling medium 3 to flow in the mixing chamber 2 and the heat dissipation channel 102. As an example, the flexible component 401 can be provided with a flexible rope body, and the stirring component 402 can be provided with a spherical structure with a certain mass, so that the stirring component 402 with the spherical structure increases disturbance in the mixing chamber 2. During the mixing process of the cooling medium 3, the stirring component 402 can be opposite to the flow direction of the cooling medium 3, thereby increasing the heat exchange mixing efficiency of the cooling medium 3 in the mixing chamber 2.

[0047] Preferably, the density of the stirring member 402 is greater than the density of the coolant, and the stirring member 402 may be configured as a spherical structure.

[0048] It should be noted that the stirring component 402 is fixedly connected to the flexible component 401, and the other end of the flexible component 401 is fixedly assembled on the side wall of the mixing chamber 2. In order to increase the disturbing force of the spoiler 4, the flexible component 401 can be set to a rope structure of different lengths, so that the stirring components 402 can be staggered with each other, thereby increasing the disturbance in different horizontal planes, thereby improving the heat exchange effect.

[0049] When the fuel cell is used in a relatively shaky environment, such as a device driven on the water surface, the stirring component 402 can swing in the opposite direction of the cooling medium 3 due to its large mass inertia, thereby increasing the heat exchange efficiency of the cooling medium 3 with a temperature difference in the mixing chamber 2.

[0050] According to one embodiment of the present application, the mixing chamber 2 is located on the side of the battery stack 1 facing the external medium. The mixing chamber 2 can be arranged on the side facing the external medium, thereby improving the heat exchange effect between the mixing chamber 2 and the external medium, and thus improving the heat exchange effect of the cooling medium 3 in the heat dissipation channel 102.

[0051] According to one embodiment of the present application, the mixing chamber 2 is located on the upper side of the battery stack 1. Due to the temperature difference between the cooling medium 3 in the mixing chamber 2 and the cooling medium 3 in the heat dissipation channel 102, the temperature of the cooling medium 3 in the heat dissipation channel 102 is higher, which will automatically generate an upward flow. The mixing chamber is located on the upper side of the battery stack 1, and can improve the mixing of the cooling medium 3 in the heat dissipation channel 102 and the cooling medium 3 in the mixing chamber, quickly perform heat exchange, and thus improve the heat exchange capacity of the cooling medium 3 in the heat dissipation channel 102.

[0052] According to one embodiment of the present application, it further includes a heat exchange chamber 6, which is attached to the mixing chamber 2, and the heat exchange chamber 6 and the mixing chamber 2 can exchange heat. Preferably, the heat exchange chamber 6 can be wrapped and arranged on the outside of the mixing chamber 2 to increase the heat transfer coefficient of the heat exchange chamber 6. As an example, heat dissipation fins can be added to the heat exchange chamber 6 or a cooling medium 3 with a higher heat transfer coefficient can be filled in the heat exchange chamber 6, thereby forming a heat exchange channel between the heat exchange chamber 6 and the mixing chamber 2, thereby rapidly reducing the temperature of the mixed cooling medium 3 in the mixing chamber 2. Those skilled in the art can adjust the filling ratio of the cooling medium 3 in the heat exchange chamber 6 or the area of ​​the heat-conducting fins according to actual use conditions to meet the requirements of actual use.

[0053] According to one embodiment of the present application, the heat exchange chamber 6 includes a liquid inlet 601, through which an external medium can be filled into the heat exchange chamber 6. As an example, the heat exchange chamber 6 can be filled with a cooling medium 3, so that the cooling medium 3 is filled into the heat exchange chamber 6 through the liquid inlet 601 provided in the heat exchange chamber 6.

[0054] Preferably, a plurality of liquid inlet holes 601 can be provided on the surface of the heat exchange chamber 6, so as to adjust the filling ratio of the cooling medium 3 at different positions and control the heat exchange coefficient between the heat exchange chamber 6 and the mixing chamber 2, thereby avoiding the problem of a reduction in the actual available power of the fuel cell due to the temperature of the cooling medium 3 in the mixing chamber 2 being too low or too high.

[0055] According to another aspect of the present application, a fuel cell heat dissipation system is provided, including a fuel cell and a mixing chamber 2, the fuel cell having a heat dissipation channel 102, the mixing chamber 2 being connected to the heat dissipation channel 102, the heat dissipation channel 102 and the mixing chamber 2 being filled with a cooling medium 3, and the mixing chamber 2 mixing the cooling medium 3 in the heat dissipation channel 102 with the cooling medium 3 in the mixing chamber 2 for heat exchange.

[0056] It should be understood that the mixing chamber 2 and the fuel cell can be separated so that the mixing chamber 2 is connected to the heat dissipation channel 102 of the fuel cell, facilitating heat exchange between the cooling medium 3 in the heat dissipation channel 102 and the cooling medium 3 in the mixing chamber 2.

[0057] The fuel cell can be installed in the fuel cell cooling system, thereby facilitating the removal and installation of the fuel cell or the fuel cell cooling system, thereby increasing the versatility of use of the fuel cell cooling system.

[0058] The mixing chamber 2 not only increases the heat exchange area of ​​the heat dissipation channel 102 within the fuel cell, but also allows the cooling medium 3, which has a temperature difference, to automatically perform heat exchange within the mixing chamber 2. This eliminates the need to increase the flow rate of the cooling medium 3 within the heat dissipation channel 102 within the fuel cell or replace the cooling medium 3 for heat exchange, effectively increasing the available power of the fuel cell.

[0059] Preferably, the mixing chamber 2 can be attached to the external medium and arranged on the upper side of the fuel cell heat dissipation channel 102 , so that the cooling medium 3 with higher heat content can exchange heat in the mixing chamber 2 .

[0060] A spoiler 4 or a guide plate may be provided in the mixing chamber 2 to increase the turbulence of the cooling medium 3 in the mixing chamber 2, thereby achieving the purpose of rapid mixing and heat exchange.

[0061] The spoiler 4 can be set as a flexible component 401 and a stirring component 402, so that the flexible component 401 can be assembled in the mixing chamber 2, so that the movement direction of the stirring component 402 in the mixing chamber 2 is opposite to the flow and heat exchange direction of the cooling medium 3 with a temperature difference or it is stationary in the mixing chamber 2, thereby increasing the disturbance of the cooling medium 3 in the mixing chamber 2.

[0062] As an example, the density of the stirring member 402 should be greater than the density of the cooling medium 3 and may be configured as a spherical structure with a certain mass.

[0063] According to one embodiment of the present application, a heat exchange chamber 6 is further included, and the heat exchange chamber 6 is attached to the mixing chamber 2 , and the heat exchange chamber 6 and the mixing chamber 2 can perform heat exchange.

[0064] According to one embodiment of the present application, the heat exchange chamber 6 includes a liquid inlet 601, through which the external medium can be filled into the heat exchange chamber 6. Preferably, the liquid inlet 601 can be provided in plurality, so that the plurality of liquid inlet holes 601 can be provided at different positions on the surface of the heat exchange chamber 6 and at different intervals relative to the external medium, thereby conveniently adjusting the filling position and ratio of the external medium entering the heat exchange chamber 6 at different positions in the heat exchange chamber 6, thereby conveniently adjusting the heat exchange efficiency between the heat exchange chamber 6 and the mixing chamber 2.

[0065] According to one embodiment of the present application, a control component is further included. The control component (not shown) can control the filling volume of the external medium in the heat exchange chamber 6 to change the heat exchange coefficient between the heat exchange chamber 6 and the mixing chamber 2. The control component can control the opening degree or opening time of the liquid inlet 601, thereby adjusting the filling ratio of the external medium in the mixing chamber 2.

[0066] As an example, when there are multiple liquid inlet holes 601, the opening and closing of the liquid inlet holes 601 at different positions can be controlled, thereby adjusting the heat exchange efficiency between the local heat exchange cavity 6 and the mixing cavity 2, thereby increasing the flexibility and accessibility of use.

[0067] According to another aspect of the present application, a fuel cell heat dissipation control method is provided, comprising the following steps:

[0068] Start the machine and run the preheating time, and check the fuel cell temperature and compare it with the preset temperature threshold;

[0069] If the temperature of the fuel cell is higher than a preset temperature threshold, the cooling system is activated;

[0070] If the temperature of the fuel cell is lower than a preset temperature threshold, the cooling system is shut down.

[0071] According to one embodiment of the present application, if the temperature of the fuel cell is lower than a preset temperature threshold, shutting down the heat dissipation system includes:

[0072] The preset temperature threshold includes a plurality of preset temperature zones, and the heat dissipation system can control the volume of the external medium entering the heat exchange chamber 6 corresponding to different preset temperature zones.

[0073] As an example, the fuel cell operating minimum temperature T1, the external medium temperature point T2, the external medium temperature point T3, the real-time temperature inside the battery stack 1 is set to Tm, and the real-time temperature of the external medium is Tn, where T2 <T3。

[0074] The fuel cell is installed on the surface of the electrical device so that the mixing chamber 2 or the heat exchange chamber 6 is fitted and fixed on the electrical device. A layer of heat dissipation silica gel can be applied between the mixing chamber 2 or the heat exchange chamber 6 and the electrical device to improve the heat conduction efficiency, and then it is fastened to the electrical device with bolts. In this way, the heat of the fuel cell can be transferred to the mixing chamber 2 and / or the heat exchange chamber 6 through the cooling medium 3, and then transferred to the electrical device through the heat dissipation silica gel. Finally, the heat is taken away by the external medium.

[0075] When the fuel cell system is operating, it is first turned on and run for 2 minutes to allow the fuel cell system to warm up and reach the appropriate operating temperature. After two minutes of preheating, the internal temperature Tm of the stack plate 101 is detected. When the internal temperature Tm is less than the minimum operating temperature T1 of the fuel cell, the fuel cell cooling system is shut down and the water inlet is completely closed. The main purpose at this time is to quickly raise the internal temperature of the fuel cell to the appropriate operating temperature.

[0076] When the internal problem Tm of the battery stack exceeds the minimum operating temperature T1 of the battery stack, the cooling system is turned on and the external medium temperature is detected, because the temperature of the external medium determines the speed of heat dissipation of the entire cooling system.

[0077] When the real-time temperature of the external medium is Tn<T2, only 1 / 3 of the heat dissipation channels 102 need to be opened, so that a small amount of the external medium with a lower temperature can pass through the hull heat dissipation channels 102 and take away part of the reaction heat;

[0078] When the temperature of the external medium is between T2 and T3, 2 / 3 of the heat dissipation channels 102 can be opened, and the external medium takes away most of the reaction heat;

[0079] When the temperature of the external medium exceeds T3, all the heat dissipation channels 102 are opened, and the external medium dissipates heat from the stack as quickly as possible.

[0080] After the cooling system has performed heat dissipation work according to different working conditions, the real-time temperature Tm inside the fuel cell stack is detected to see if it is within the appropriate reaction temperature threshold. The appropriate temperature threshold for fuel cell propulsion is determined based on the actual fuel cell usage parameters. If the fuel cell is within the appropriate temperature operating range, it proves that the cooling method of the cooling system is appropriate and the current state can be maintained.

[0081] If the real-time temperature Tm inside the fuel cell stack is in an inappropriate temperature range, the heat dissipation system returns to the upper level to repeat the operation until the real-time temperature Tm inside the fuel cell stack is in a suitable reaction temperature range.

[0082] A fuel cell for a ship comprises the fuel cell, or the fuel cell heat dissipation system, or the fuel cell heat dissipation control method.

[0083] As an example, the fuel cell and its heat dissipation system are mounted on the hull floor, with the mixing chamber 2 attached to the floor and bolted securely. When the fuel cell generates heat through the electrochemical reaction, the cooling medium 3 flows through the electrode plate 101, distributing the heat to the entire cooling medium 3. As the ship sways, the mixing chamber 2 within the fuel cell causes the built-in spoiler 4 to sway side to side, stirring the cooling medium 3 and enhancing heat dissipation throughout the entire cooling medium 3.

[0084] Specifically, the stirring member 402 in the spoiler 4 drives the flexible member 401 to shake within the mixing chamber 2, thereby enhancing the mixed heat exchange between the cooling medium 3 in the heat dissipation passage and the cooling medium 3 in the mixing chamber 2. The heat exchange chamber 6 can be disposed in a portion that contacts the hull and the water, and the amount of water entering the heat exchange chamber 6 can be adjusted through the liquid inlet 601 on the surface of the heat exchange chamber 6.

[0085] The mixing chamber 2 and the hull can be fastened with bolts, and the contact surfaces of the two are made of metal. The hull can take away the heat of the cooling medium 3 in the mixing chamber 2 to the external medium through heat conduction. Since the temperature of the external medium is lower, the chemical heat of the entire fuel cell can be taken away.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0087] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A fuel cell for a ship, characterized in that: The invention comprises a battery stack (1) and a heat dissipation device, wherein the battery stack (1) comprises a plurality of stacked pole plates (101), a heat dissipation channel (102) is formed in the battery stack (1), the heat dissipation channel (102) is communicated with the mixing chamber (2), the heat dissipation channel (102) and the mixing chamber (2) are filled with a cooling medium (3), and the mixing chamber (2) mixes the cooling medium (3) in the heat dissipation channel (102) with the cooling medium (3) in the mixing chamber (2) for heat exchange; the fuel cell is used to be assembled at the bottom plate of a hull, the mixing chamber (2) is attached to the bottom plate of the hull, and the contact surfaces of the mixing chamber (2) and the bottom plate of the hull are both metal; The mixing chamber (2) is further provided with a spoiler (4) and a flow guide (5), the spoiler (4) comprising a flexible component (401) and a stirring component (402), the flexible component (401) being assembled in the mixing chamber (2), the stirring component (402) being able to swing along the flexible component (401) to drive the cooling medium (3) to flow in the mixing chamber (2) and the heat dissipation channel (102), the flow guide (5) being a flow guide plate, and the flow guide plate being arranged at an angle in the mixing chamber (2); the flexible component (401) being a flexible rope body, the stirring component (402) being a spherical structure with a certain mass, the density of the stirring component (402) being greater than the density of the cooling medium, the flexible component (401) being a rope structure of different lengths, so that the stirring components (402) are staggered with each other; The mixing chamber (2) is located on the lower side of the battery stack (1).

2. The fuel cell for a ship according to claim 1, wherein: The mixing chamber (2) further comprises a heat exchange wall (201), wherein the heat exchange wall (201) is attached to the external medium, and the mixing chamber (2) dissipates heat to the external medium through the heat exchange wall (201).

3. The fuel cell for a ship according to claim 1, wherein: The mixing chamber (2) is located on a side of the battery stack (1) facing the external medium.

4. The fuel cell for a ship according to claim 1, wherein: It also includes a heat exchange chamber (6), the heat exchange chamber (6) being attached to the mixing chamber (2), and the heat exchange chamber (6) and the mixing chamber (2) being capable of heat exchange.

5. The fuel cell for a ship according to claim 4, wherein: The heat exchange cavity (6) comprises a liquid inlet hole (601), and external medium can be filled into the heat exchange cavity (6) through the liquid inlet hole (601).

6. A fuel cell cooling system for a ship, characterized in that: The fuel cell for a ship comprises the fuel cell according to any one of claims 1 to 5.

7. The fuel cell heat dissipation system for a ship according to claim 6, wherein: It also includes a heat exchange chamber (6), the heat exchange chamber (6) being attached to the mixing chamber (2), and the heat exchange chamber (6) and the mixing chamber (2) being capable of heat exchange.

8. The fuel cell cooling system for a ship according to claim 7, wherein: The heat exchange cavity (6) comprises a liquid inlet hole (601), and external medium can be filled into the heat exchange cavity (6) through the liquid inlet hole (601).

9. The fuel cell cooling system for a ship according to claim 7, wherein: It also includes a control component, which can control the filling volume of the external medium in the heat exchange chamber (6) to change the heat exchange coefficient between the heat exchange chamber (6) and the mixing chamber (2).

10. A method for controlling heat dissipation of a fuel cell for a ship, implemented by the heat dissipation system for a fuel cell for a ship according to any one of claims 6 to 9, characterized in that: The steps include: Start the machine and run the preheating time, and check the fuel cell temperature and compare it with the preset temperature threshold; If the temperature of the fuel cell is higher than a preset temperature threshold, the cooling system is activated; If the temperature of the fuel cell is lower than a preset temperature threshold, the cooling system is shut down.

11. The method for controlling heat dissipation of a fuel cell for a ship according to claim 10, wherein: The fuel cell for a ship comprises a heat exchange chamber (6), the heat exchange chamber (6) being attached to the mixing chamber (2), and the heat exchange chamber (6) and the mixing chamber (2) being capable of heat exchange; If the temperature of the fuel cell is lower than a preset temperature threshold, the cooling system is shut down, including: The preset temperature threshold includes a plurality of preset temperature zones, and the heat dissipation system can control the volume of the external medium entering the heat exchange chamber (6) corresponding to different preset temperature zones.

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