Fuel cell stack cooling system

Abstract

The present invention discloses a heat dissipation system for a fuel cell stack, comprising an outer dust cover, a fuel cell stack and a heat dissipation system arranged inside the outer dust cover; a first heat dissipation through hole and a second heat dissipation through hole are arranged in the heat dissipation system, and the clean gas after cooling is discharged from various directions through the first heat dissipation through hole and the second heat dissipation through hole, so as to effectively and quickly cool down the fuel cell stack in all directions and in all positions in all directions, from top to bottom and from front to back. The heat dissipation system for a fuel cell stack provided by the present invention can realize timely and effective cooling wind heat dissipation of the fuel cell stack in all directions without using a heat dissipation fan, and has a good heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cooling systems, and in particular to a cooling system for a fuel cell stack. Background Art

[0002] A battery stack refers to a battery stack composed of multiple fuel cells, the purpose of which is to obtain a voltage for practical applications. The key to a battery stack is the materials and manufacturing technology that make up the battery stack. The materials must have sufficient chemical and thermal stability, and the electrochemical performance must meet the requirements, and the volume and weight must be minimized. The technical principle of a fuel cell stack is to use steam reforming to convert methanol and hydrogen carried in water into H2, and the chemical energy in H2 is converted into electrical energy by chemical means. The so-called steam reforming method is to mix methanol fuel with water vapor and enter the reformer. Under the action of appropriate temperature and catalyst, a reforming reaction occurs to produce hydrogen. A methanol reforming fuel cell is a high-temperature fuel cell. Its normal operating temperature is 160℃-180℃. When the fuel cell is working normally, hydrogen and oxygen undergo an electrochemical reaction inside the stack to generate electricity, and a large amount of heat is released at the same time.

[0003] Prolonged heating of the fuel cell stack will lead to reduced safety performance and shortened battery life, causing power limitation or emergency shutdown of the fuel cell system. Therefore, it is necessary to promptly discharge excess heat from the fuel cell stack through heat dissipation equipment, and further maintain the temperature within the optimal temperature range of the stack reaction.

[0004] Existing fuel cell stacks generally use cooling fans for heat dissipation. Using cooling fans as the cooling system of fuel cell stacks has the following defects: (1) The cooling fan is bulky and occupies a large area. If it is necessary to provide timely and effective heat dissipation to the fuel cell stack in all directions, it is often necessary to set up multiple cooling fans at different positions. Otherwise, the cooling fan at a single position or direction can only achieve a limited cooling effect, and the overall cooling effect needs to be greatly enhanced; (2) The blades of the cooling fan are prone to dust absorption and accumulation after long-term use. After dust accumulation, the wind force of the cooling fan will be greatly reduced. On the one hand, the reduced wind force will also greatly reduce the cooling effect of the fuel cell stack, and a new cooling fan needs to be replaced. The fan is inconvenient to disassemble and replace, which increases the cost. If it is not replaced in time, it may even cause the fuel cell system to limit power or emergency shutdown. On the other hand, the cooling fan that accumulates dust may also produce wind with dust. While blowing air to dissipate heat, the dust will be blown toward the fuel cell stack, posing a hidden danger to the safety performance of the fuel cell stack or even causing damage. (3) Existing fuel cell stacks are generally installed in a relatively closed environment with limited space. Therefore, even if multiple cooling fans are installed, in hot weather, the heat dissipation speed of the fuel cell stack is still slow due to the limited space in the relatively closed environment. At this time, the fuel cell stack needs to be designed with a cooling device with better heat dissipation effect in hot weather. Summary of the invention

[0005] In view of this, the present invention proposes a fuel cell stack heat dissipation system.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A fuel cell stack heat dissipation system comprises an outer dust cover, a fuel cell stack and a heat dissipation system arranged inside the outer dust cover; the heat dissipation system comprises a first heat dissipation main pipe, a first heat dissipation branch pipe, a second heat dissipation main pipe, a second heat dissipation branch pipe, a first transition pipe, a second transition pipe, a first coolant pipe, a second coolant pipe, a first air intake pipe, a second air intake pipe and a coolant supply device;

[0008] The front end and the rear end of the fuel cell stack are respectively provided with a plurality of first heat dissipation main pipes, the upper end and the lower end between each two adjacent first heat dissipation main pipes are respectively provided with a first transition pipe, and the upper and lower first transition pipes are connected to each other with a plurality of first heat dissipation branch pipes; the upper end and the lower end of the fuel cell stack are respectively provided with a plurality of second heat dissipation main pipes, the front end and the rear end between each two adjacent second heat dissipation main pipes are respectively provided with a second transition pipe, and the front end and the rear end second transition pipes are connected to each other with a plurality of second heat dissipation branch pipes; the inner side end surface of each of the first heat dissipation main pipes is connected to the second transition pipe, and the lower end surfaces on both sides of each of the second heat dissipation main pipes are connected to the first transition pipe;

[0009] The interior of each of the first heat dissipation main pipes is divided from top to bottom into a first heat dissipation sub-chamber, a first heat dissipation main chamber, and a first heat dissipation sub-chamber by a partition; all first heat dissipation main chambers and first heat dissipation sub-chambers are connected to the first air intake pipe; the interiors of all second heat dissipation main pipes are connected to the second air intake pipe; the air intake pipe ends of the first air intake pipe and the second air intake pipe are respectively provided with dustproof box components;

[0010] All first heat dissipation main pipes, first transition pipes and first heat dissipation branch pipes are provided with first cooling liquid pipes; all second heat dissipation main pipes, second transition pipes and second heat dissipation branch pipes are provided with second cooling liquid pipes; both ends of the first cooling liquid pipe extend out of the first heat dissipation main pipe, and the extended ends are connected to the first cooling liquid collection chamber of the cooling liquid supply device; both ends of the second cooling liquid pipe extend out of the second heat dissipation main pipe, and the extended ends are connected to the second cooling liquid collection chamber of the cooling liquid supply device; the inner side walls of the first heat dissipation main pipe and the first heat dissipation branch pipe corresponding to the position of the first heat dissipation main cavity are respectively penetrated with a plurality of first cooling holes; the lower side walls of the second heat dissipation branch pipe are respectively penetrated with a plurality of second cooling holes.

[0011] Furthermore, the coolant supply device includes a supply chamber body, a first coolant collection chamber fixed in the supply chamber body, a second coolant collection chamber fixed in the first coolant collection chamber, and a cooling fan arranged on the upper wall of the supply chamber body; the top height of the second coolant collection chamber is higher than the top height of the first coolant collection chamber.

[0012] Furthermore, a certain distance is left between the outer wall of the first coolant collection chamber and the inner wall of the supply chamber body; and a plurality of protrusions are radially connected on the outer circumferential side surface of the second coolant collection chamber.

[0013] Further, a serpentine first cooling liquid pipe is provided inside the first cooling main pipe, the first transition pipe and the first cooling branch pipe at the front end; another serpentine first cooling liquid pipe is provided inside the first cooling main pipe, the first transition pipe and the first cooling branch pipe at the rear end; both ends of the two serpentine first cooling liquid pipes extend out of the first cooling main pipe, and the extended ends of the two serpentine first cooling liquid pipes are connected to the upper end and the lower end of the first cooling liquid collecting chamber through pipelines respectively;

[0014] A serpentine second coolant pipe is provided inside the second heat dissipation main pipe, the second transition pipe and the second heat dissipation branch pipe at the upper end; another serpentine second coolant pipe is provided inside the second heat dissipation main pipe, the second transition pipe and the second heat dissipation branch pipe at the lower end; both ends of the two serpentine second coolant pipes extend out of the second heat dissipation main pipe, and the extended ends of the two serpentine second coolant pipes are connected to the upper end and the lower end of the second coolant collection chamber through pipes respectively; driving pumps are provided on the pipes connected to the serpentine first coolant pipe and the serpentine second coolant pipe respectively.

[0015] Furthermore, the intake pipe ends of the first intake pipe and the second intake pipe are provided with a driving pump;

[0016] The dustproof box assembly includes a dustproof box body, a dust collecting trough arranged in the dustproof box body, and a plurality of dustproof combination plates arranged in the dust collecting trough; the plurality of dustproof combination plates are distributed at a certain interval in the dust collecting trough along the air intake direction; the dustproof combination plate includes a first dustproof mesh plate and a second dustproof mesh plate; the second dustproof mesh plate and the first dustproof mesh plate are arranged in sequence along the air intake direction; first slide grooves are provided at the inner ends of both sides of the dust collecting trough, and first slide bars are provided at the outer ends of both sides of the first dustproof mesh plate, and the first slide bars are slidably arranged in the first slide grooves; the top end of the first dustproof mesh plate extends out of the top plate of the dustproof box body; the second dustproof mesh plate is an arc-shaped dustproof mesh plate, and a plurality of protruding blocks are provided on the end surface of the arc-shaped dustproof mesh plate facing the first dustproof mesh plate, and the plurality of protruding blocks are in contact with the first dustproof mesh plate.

[0017] Furthermore, the arc-shaped dustproof mesh plate is an elastic arc-shaped mesh plate; when a plurality of protruding blocks are in contact with the first dustproof mesh plate, the elastic arc-shaped mesh plate is in an elastically compressed state.

[0018] Further, the inner ends of both sides of the dust collecting groove are provided with second slide grooves, the outer ends of both sides of the first dustproof screen are provided with second slide bars, and the second slide bars are embedded in the second slide grooves; the bottom end of the dust collecting groove is embedded with a first magnet block corresponding to the position of the second slide bar, and the bottom end of the second slide bar is fixed with a second magnet block, and the first magnet block and the second magnet block are magnetically attracted to each other;

[0019] A third magnet block is fixedly disposed on both sides of the top of the first slide bar, and a fourth magnet block is embedded in the top plate of the dustproof box body corresponding to the position of the third magnet block, and the third magnet block and the fourth magnet block are magnetically attracted to each other.

[0020] Furthermore, the top height of the second dustproof mesh plate is flush with the top height of the dust collecting slot, and the top height of the dust collecting slot is flush with the top height of the inner wall of the dustproof box; the top height of the first dustproof mesh plate is flush with the outer wall height of the top plate of the dustproof box; and a handle is provided on the first dustproof mesh plate;

[0021] A limiting groove is arranged on the inner bottom wall of the dustproof box body; a limiting protrusion is arranged on the outer bottom wall of the dust collecting groove; and the limiting protrusion is matched and embedded in the limiting groove.

[0022] Furthermore, the outer dust cover is a square air-permeable dust-proof net; the outer dust cover has accommodating through holes corresponding to the positions of each pipeline;

[0023] The bottom end of the supply chamber body and the bottom end of the outer dust cover are located at the same horizontal plane;

[0024] The fuel cell stack is provided with a stack connecting plate, and the fuel cell stack is threadedly connected with the connecting plate on the outer dust cover through the connecting plate.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The fuel cell stack cooling system can achieve timely and effective heat dissipation of the fuel cell stack in all directions without using a cooling fan, and the heat dissipation effect is very good;

[0027] (2) The fuel cell stack heat dissipation system prevents dust from entering the fuel cell stack during the heat dissipation process, and more thoroughly solves the problem of dust adhesion to the fuel cell stack. After long-term use, the heat dissipation effect of the fuel cell stack can be stably maintained, avoiding safety hazards caused by dust adhesion;

[0028] (3) In hot weather, even if the fuel cell stack is installed in a relatively closed space, the fuel cell stack cooling system can still achieve rapid heat dissipation and cooling of the fuel cell stack and quickly discharge excess heat because the heat dissipation wind in all directions is cold wind;

[0029] (4) The fuel cell stack heat dissipation system has a good heat dissipation effect, a novel structure, an ingenious design, and the installation and connection of each structure itself and between the structures are not complicated, and it has good promotion and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0032] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention when the outer dust cover is not installed;

[0033] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention when the outer dust cover is not installed;

[0034] Figure 5It is a schematic diagram of the three-dimensional structure of the present invention when the outer dust cover is not installed;

[0035] Figure 6 A schematic diagram of the three-dimensional structure of the whole of the present invention when the outer dust cover is not installed;

[0036] Figure 7 It is a front view of the whole of the present invention when the outer dust cover is not installed;

[0037] Figure 8 for Figure 7 AA section view in the figure;

[0038] Fig. 9 for Figure 7 BB section view in the figure;

[0039] Fig.10 It is a top view of the whole of the present invention without the outer dust cover installed;

[0040] Fig.11 for Fig.10 CC section view in the figure;

[0041] Fig.12 for Fig.10 DD section view;

[0042] Fig.13 for Fig.10 EE section view in the figure;

[0043] Fig.14 for Fig.13 The enlarged view of the F part in the figure;

[0044] Fig.15 It is a top view of the whole of the present invention when the outer dust cover and the dustproof box top plate are not installed;

[0045] Fig.16 for Fig.15 The enlarged view of the G section in the figure;

[0046] Fig.17 It is a schematic diagram of the exploded structure of the cooling liquid supply device of the present invention;

[0047] Fig.18 It is a schematic diagram of the exploded structure of the coolant supply device of the present invention.

[0048] In the figure: 1. outer dust cover; 2. fuel cell stack; 3. stack connecting plate; 4. first heat dissipation main pipe; 5. first heat dissipation branch pipe; 6. second heat dissipation main pipe; 7. second heat dissipation branch pipe; 8. first transition pipe; 9. second transition pipe; 10. first coolant pipe; 11. second coolant pipe; 12. first air intake pipe; 13. second air intake pipe; 14. partition; 15. first heat dissipation sub-chamber; 16. first heat dissipation main chamber; 17. dustproof box; 18. dust collecting trough; 19. first dustproof mesh plate; 20. second dustproof mesh plate; 21. first slide bar; 22. third magnet block; 23. second slide bar; 24. protruding block; 25. handle; 26. pipeline; 27. first heat dissipation hole; 28. second heat dissipation hole; 29. ​​supply chamber body; 30. first coolant collection chamber; 31. second coolant collection chamber; 32. cooling fan; 33. protruding part. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0050] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Example:

[0053] like Figure 1-Figure 18 As shown, a fuel cell stack heat dissipation system, a fuel cell stack heat dissipation system, includes an outer dust cover 1, and a fuel cell stack 2 and a heat dissipation system arranged inside the outer dust cover 1.

[0054] The outer dust cover 1 is a square air-permeable dust-proof net; the outer dust cover 1 has accommodating through holes corresponding to the positions of each pipeline 26. The fuel cell stack 2 is provided with a stack connecting plate 3, and the fuel cell stack 2 is threadedly connected to the connecting plate on the outer dust cover 1 through the connecting plate.

[0055] The heat dissipation system includes a first heat dissipation main pipe 4, a first heat dissipation branch pipe 5, a second heat dissipation main pipe 6, a second heat dissipation branch pipe 7, a first transition pipe 8, a second transition pipe 9, a first coolant pipe 10, a second coolant pipe 11, a first air intake pipe 12, a second air intake pipe 13 and a coolant supply device.

[0056] A plurality of first heat dissipation main pipes 4 are respectively provided at the front end and the rear end of the fuel cell stack 2, a first transition pipe 8 is respectively provided at the upper end and the lower end between every two adjacent first heat dissipation main pipes 4, and a plurality of first heat dissipation branch pipes 5 are connected between the upper and lower first transition pipes 8.

[0057] A plurality of second heat dissipation main pipes 6 are respectively provided at the upper and lower ends of the fuel cell stack 2, and a second transition pipe 9 is respectively provided at the front and rear ends between every two adjacent second heat dissipation main pipes 6, and a plurality of second heat dissipation branch pipes 7 are connected between the front and rear second transition pipes 9; the inner end surface of each first heat dissipation main pipe 4 is connected to the second transition pipe 9, and the lower end surfaces on both sides of each second heat dissipation main pipe 6 are connected to the first transition pipe 8.

[0058] The interior of each first heat dissipation main pipe 4 is divided into a first heat dissipation sub-chamber 15, a first heat dissipation main chamber 16, and a first heat dissipation sub-chamber 15 from top to bottom by a partition 14; the first heat dissipation main chamber 16 covers the battery stack area. All first heat dissipation main chambers 16 and first heat dissipation sub-chambers 15 are connected to the first air intake pipe 12; the interiors of all second heat dissipation main pipes 6 are connected to the second air intake pipe 13.

[0059] A driving pump is provided at the air inlet end of the first air inlet pipe 12 and the second air inlet pipe 13. A dustproof box assembly is provided at the air inlet end of the first air inlet pipe 12 and the second air inlet pipe 13 respectively.

[0060] The dustproof box assembly includes a dustproof box body 17, a dust collecting groove 18 arranged in the dustproof box body 17, and a plurality of dustproof assembly plates arranged in the dust collecting groove 18. The plurality of dustproof assembly plates are distributed in the dust collecting groove 18 at a certain interval along the air intake direction.

[0061] The dustproof composite plate includes a first dustproof mesh plate 19 and a second dustproof mesh plate 20; the second dustproof mesh plate 20 and the first dustproof mesh plate 19 are arranged in sequence along the air intake direction. A first slide groove is provided at the inner ends of both sides of the dust collecting groove 18, and a first slide bar 21 is provided at the outer ends of both sides of the first dustproof mesh plate 19, and the first slide bar 21 is slidably arranged in the first slide groove; the top of the first dustproof mesh plate extends out of the top plate of the dustproof box body 17. A third magnet block 22 is fixedly provided on both sides of the top of the first slide bar 21, and a fourth magnet block is embedded in the top plate of the dustproof box body 17 corresponding to the position of the third magnet block 22, and the third magnet block 22 and the fourth magnet block are magnetically attracted to each other.

[0062] The inner ends of both sides of the dust collecting trough 18 are provided with second slide grooves, and the outer ends of both sides of the first dustproof mesh plate 19 are provided with second slide bars 23, and the second slide bars 23 are embedded in the second slide grooves. The second dustproof mesh plate 20 is an arc-shaped dustproof mesh plate, and the arc-shaped dustproof mesh plate is an elastic arc-shaped mesh plate. A plurality of protruding blocks 24 are provided on the end surface of the elastic arc-shaped mesh plate facing the first dustproof mesh plate 19, and a plurality of protruding blocks 24 are in contact with the first dustproof mesh plate 19. When a plurality of protruding blocks 24 are in contact with the first dustproof mesh plate 19, the elastic arc-shaped mesh plate is in an elastically compressed state. A first magnet block is embedded at the bottom end of the dust collecting trough 18 corresponding to the position of the second slide bar 23, and a second magnet block is fixed at the bottom end of the second slide bar 23, and the first magnet block and the second magnet block are magnetically attracted to each other.

[0063] The top of the second dustproof screen 20 is flush with the top of the dust collecting groove 18, and the top of the dust collecting groove 18 is flush with the top of the inner wall of the dustproof box 17; the top of the first dustproof screen 19 is flush with the outer wall of the top plate of the dustproof box 17. A handle 25 is provided on the first dustproof screen 19 to facilitate the removal of the dustproof screen.

[0064] A limiting groove is provided on the inner bottom wall of the dustproof box body 17; a limiting protrusion is provided on the outer bottom wall of the dust collecting groove 18; and the limiting protrusion is matched and embedded in the limiting groove.

[0065] A serpentine first cooling liquid pipe 10 is provided inside the front first cooling main pipe 4, the first transition pipe 8 and the first cooling branch pipe 5; another serpentine first cooling liquid pipe 10 is provided inside the rear first cooling main pipe 4, the first transition pipe 8 and the first cooling branch pipe 5. Both ends of the two serpentine first cooling liquid pipes 10 extend out of the first cooling main pipe 4, and the extended ends of the two serpentine first cooling liquid pipes 10 are connected to the upper end and the lower end of the first cooling liquid collection chamber 30 through the pipeline 26 respectively.

[0066] A serpentine second cooling liquid pipe 11 is provided inside the upper second cooling main pipe 6, the second transition pipe 9 and the second cooling branch pipe 7; another serpentine second cooling liquid pipe 11 is provided inside the lower second cooling main pipe 6, the second transition pipe 9 and the second cooling branch pipe 7. Both ends of the two serpentine second cooling liquid pipes 11 extend out of the second cooling main pipe 6, and the extended ends of the two serpentine second cooling liquid pipes 11 are connected to the upper end and the lower end of the second cooling liquid collection chamber 31 through the pipeline 26 respectively.

[0067] The pipelines 26 connected to the serpentine first coolant pipe 10 and the serpentine second coolant pipe 11 are respectively provided with driving pumps.

[0068] A plurality of first heat dissipation holes 27 are respectively provided on the inner side walls of the first heat dissipation main pipe 4 and the first heat dissipation branch pipe 5 corresponding to the position of the first heat dissipation main cavity 16. A plurality of second heat dissipation holes 28 are respectively provided on the lower side walls of the second heat dissipation branch pipe 7, and the second heat dissipation holes 28 at both side ends extend out of the fuel cell stack 2 to facilitate heat dissipation in the upper and lower directions of the fuel cell stack 2.

[0069] The coolant supply device includes a supply chamber body 29, a first coolant collection chamber 30 fixed in the supply chamber body 29, a second coolant collection chamber 31 fixed in the first coolant collection chamber 30, and a cooling fan 32 arranged on the upper wall of the supply chamber body 29; the top height of the second coolant collection chamber 31 is higher than the top height of the first coolant collection chamber 30.

[0070] A certain distance is left between the outer wall of the first coolant collection chamber 30 and the inner wall of the supply chamber body 29 ; the outer circumferential side surface of the second coolant collection chamber 31 is radially connected and provided with a plurality of protrusions 33 .

[0071] The bottom end of the supply chamber body 29 and the bottom end of the outer dust cover 1 are located at the same horizontal plane.

[0072] The beneficial effects of the present invention are:

[0073] The fuel cell stack 2 is entirely in the outer dust cover 1, which prevents dust from the external environment from entering the fuel cell stack 2, and the outer dust cover 1 can still ventilate and discharge excess heat; the panels of the outer dust cover 1 can be disassembled from each other to facilitate the placement of the fuel cell stack 2 and the overall installation of the outer dust cover 1;

[0074] The two driving pumps are turned on and the coolant in the first coolant collection chamber 30 enters the first coolant pipe 10 through the pipe 26; the coolant in the second coolant collection chamber 31 enters the second coolant pipe 11 through the pipe 26;

[0075] The outside air enters the dustproof box assembly from the first air inlet pipe 12, and passes through a plurality of second dustproof mesh plates 20 and a first dustproof mesh plate 19 in sequence, so that dust is trapped and adsorbed on the plurality of second dustproof mesh plates 20 and the first dustproof mesh plates 19, and the outside air is purified to obtain clean air;

[0076] Similarly, the outside air enters the dustproof box assembly from the second air inlet pipe 13, and passes through the plurality of second dustproof mesh plates 20 and the first dustproof mesh plates 19 in sequence, so that the dust is trapped and adsorbed on the plurality of second dustproof mesh plates 20 and the first dustproof mesh plates 19, and the outside air is purified to obtain clean air;

[0077] When too much dust accumulates on the first dustproof mesh plate 19, the first dustproof mesh plate 19 can be directly pulled out by the handle 25. During the pulling-out process, the first dustproof mesh plate 19 continuously rubs against the protruding block 24 on the second dustproof mesh plate 20, and the dust on the first dustproof mesh plate 19 and the second dustproof mesh plate 20 is bounced off, and the dust falls into the dust collecting groove 18. To a certain extent, the dust collecting groove 18 can also be removed and poured out; the second dustproof mesh plate 20 is made of an elastic metal plate, so that there is an elastic pressing force between the first dustproof mesh plate 19 and the protruding block 24, which is very conducive to the dust being bounced off when rubbing against each other;

[0078] The clean gas in the first air inlet pipe 12 is divided into two paths. One path enters the first heat dissipation main cavity 16. After being cooled by the coolant in the first coolant pipe 10 in the first heat dissipation main cavity 16, the clean gas temperature is reduced and becomes cooling wind, which is discharged from the first heat dissipation hole 27, thereby realizing rapid heat dissipation of the front and rear ends of the fuel cell stack 2; the other path enters the first heat dissipation sub-cavity 15, and then enters the second heat dissipation branch pipe 7. After being cooled by the coolant in the second coolant pipe 11 in the second heat dissipation branch pipe 7, the clean gas temperature is reduced and becomes cooling wind, which is discharged from the second heat dissipation hole 28, thereby realizing rapid convection heat dissipation of the upper and lower ends of the fuel cell stack 2;

[0079] The clean gas in the second air inlet pipe 13 is divided into one path and enters the first heat dissipation branch pipe 5. After being cooled by the coolant in the first coolant pipe 10 in the first heat dissipation branch pipe 5, the clean gas temperature is reduced and becomes cooling air, which is discharged from the first heat dissipation hole 27, further realizing rapid heat dissipation at the front and rear ends of the fuel cell stack 2.

[0080] The first heat dissipation hole 27 and the second heat dissipation hole 28 both blow out clean gas after cooling, so that even in hot weather and when the installation space of the fuel cell stack 2 is limited, the fuel cell stack 2 can be quickly and effectively cooled, and the design is exquisite;

[0081] The coolant that has undergone heat exchange with the clean gas enters the first coolant collection chamber 30 through the first coolant pipe 10 and the pipe 26; the coolant that has undergone heat exchange with the clean gas enters the second coolant collection chamber 31 through the second coolant pipe 11 and the pipe 26; on the one hand, the cooling fan 32 cools down and dissipates heat to the first coolant collection chamber 30 and the second coolant collection chamber 31 at the same time, and the cooling wind cools down and dissipates heat not only to the upper end and the surrounding wall of the first coolant collection chamber 30, but also to the upper end and the surrounding wall of the first coolant collection chamber 30; on the other hand, the protrusion 33 extends radially into the first coolant collection chamber 30, so that the heat of the coolant in the first coolant collection chamber 30 and the coolant in the second coolant collection chamber 31 are exchanged with each other, and the two are cooled down quickly and evenly;

[0082] The reason for adopting the cooling air cooling methods of the front and rear ends and the upper and lower ends for cooling the fuel cell stack 2 is that: on the one hand, the fuel cell stack 2 can be effectively and quickly cooled in all directions and at all positions in the upper and lower front and back directions; on the other hand, the cooling air outlet directions in different directions can also quickly spray the excess heat around the fuel cell stack 2 to the outside of the outer dust cover 1, so as to avoid the accumulation of excess heat around the fuel cell stack 2 in a certain direction.

[0083] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fuel cell stack cooling system, characterized in that: The invention comprises an outer dust cover (1), a fuel cell stack (2) arranged inside the outer dust cover (1), and a heat dissipation system; the heat dissipation system comprises a first heat dissipation main pipe (4), a first heat dissipation branch pipe (5), a second heat dissipation main pipe (6), a second heat dissipation branch pipe (7), a first transition pipe (8), a second transition pipe (9), a first coolant pipe (10), a second coolant pipe (11), a first air intake pipe (12), a second air intake pipe (13), and a coolant supply device; The front end and the rear end of the fuel cell stack (2) are respectively provided with a plurality of first heat dissipation main pipes (4); the upper end and the lower end between each two adjacent first heat dissipation main pipes (4) are respectively provided with a first transition pipe (8); and the upper and lower first transition pipes (8) are connected to each other with a plurality of first heat dissipation branch pipes (5); the upper end and the lower end of the fuel cell stack (2) are respectively provided with a plurality of second heat dissipation main pipes (6); the front end and the rear end between each two adjacent second heat dissipation main pipes (6) are respectively provided with a second transition pipe (9); and the front and rear second transition pipes (9) are connected to each other with a plurality of second heat dissipation branch pipes (7); the inner side end surface of each first heat dissipation main pipe (4) is connected to the second transition pipe (9); and the lower end surfaces on both sides of each second heat dissipation main pipe (6) are connected to the first transition pipe (8); The interior of each of the first heat dissipation main pipes (4) is divided from top to bottom into a first heat dissipation sub-chamber (15), a first heat dissipation main chamber (16), and a first heat dissipation sub-chamber (15) by a partition plate (14); all first heat dissipation main chambers (16) and first heat dissipation sub-chambers (15) are connected to the first air intake pipe (12); the interiors of all second heat dissipation main pipes (6) are connected to the second air intake pipe (13); and dustproof box components are provided at the air intake pipe ends of the first air intake pipe (12) and the second air intake pipe (13); All first heat dissipation main pipes (4), first transition pipes (8) and first heat dissipation branch pipes (5) are provided with first cooling liquid pipes (10); all second heat dissipation main pipes (6), second transition pipes (9) and second heat dissipation branch pipes (7) are provided with second cooling liquid pipes (11); both ends of the first cooling liquid pipe (10) extend out of the first heat dissipation main pipe (4), and the extended ends are connected to a first cooling liquid collection chamber (30) of a cooling liquid supply device; both ends of the second cooling liquid pipe (11) extend out of the second heat dissipation main pipe (6), and the extended ends are connected to a second cooling liquid collection chamber (31) of a cooling liquid supply device; a plurality of first cooling holes (27) are respectively provided through the inner side walls of the first heat dissipation main pipe (4) and the first heat dissipation branch pipe (5) at positions corresponding to the first heat dissipation main cavity (16); and a plurality of second cooling holes (28) are respectively provided through the lower side walls of the second heat dissipation branch pipe (7).

2. The fuel cell stack cooling system according to claim 1, characterized in that: The cooling liquid supply device comprises a supply chamber body (29), a first cooling liquid collection chamber (30) fixedly arranged in the supply chamber body (29), a second cooling liquid collection chamber (31) sleeved and fixedly arranged in the first cooling liquid collection chamber (30), and a cooling fan (32) arranged on the upper wall of the supply chamber body (29); the top height of the second cooling liquid collection chamber (31) is higher than the top height of the first cooling liquid collection chamber (30).

3. The fuel cell stack cooling system according to claim 2, characterized in that: A certain distance is left between the outer wall of the first cooling liquid collecting chamber (30) and the inner wall of the supply chamber body (29); and a plurality of protrusions (33) are radially connected to the outer circumferential side surface of the second cooling liquid collecting chamber (31).

4. The fuel cell stack cooling system according to claim 3, characterized in that: A serpentine first cooling liquid pipe (10) is provided inside the first cooling main pipe (4), the first transition pipe (8) and the first cooling branch pipe (5) at the front end; another serpentine first cooling liquid pipe (10) is provided inside the first cooling main pipe (4), the first transition pipe (8) and the first cooling branch pipe (5) at the rear end; both ends of the two serpentine first cooling liquid pipes (10) extend out of the first cooling main pipe (4), and the extended ends of the two serpentine first cooling liquid pipes (10) are connected to the upper end and the lower end of the first cooling liquid collecting chamber (30) through pipes (26) respectively; A serpentine second cooling liquid pipe (11) is provided inside the second cooling main pipe (6), the second transition pipe (9) and the second cooling branch pipe (7) at the upper end; another serpentine second cooling liquid pipe (11) is provided inside the second cooling main pipe (6), the second transition pipe (9) and the second cooling branch pipe (7) at the lower end; both ends of the two serpentine second cooling liquid pipes (11) extend out of the second cooling main pipe (6), and the extended ends of the two serpentine second cooling liquid pipes (11) are connected to the upper end and the lower end of the second cooling liquid collecting chamber (31) through pipes (26) respectively; and driving pumps are provided on the pipes (26) connected to the serpentine first cooling liquid pipe (10) and the serpentine second cooling liquid pipe (11).

5. The fuel cell stack cooling system according to claim 1, characterized in that: The intake pipe ends of the first intake pipe (12) and the second intake pipe (13) are provided with a driving pump; The dustproof box assembly comprises a dustproof box body (17), a dust collecting groove (18) arranged in the dustproof box body (17), and a plurality of dustproof assembly plates arranged in the dust collecting groove (18); the plurality of dustproof assembly plates are distributed in the dust collecting groove (18) at a certain interval along the air intake direction; the dustproof assembly plates comprise a first dustproof mesh plate (19) and a second dustproof mesh plate (20); the second dustproof mesh plate (20) and the first dustproof mesh plate (19) are arranged in sequence along the air intake direction; the dust collecting groove (18) A first slide groove is provided at the inner ends of both sides, and a first slide bar (21) is provided at the outer ends of both sides of the first dustproof mesh plate (19), and the first slide bar (21) is slidably arranged in the first slide groove; the top end of the first dustproof mesh plate extends out of the top plate of the dustproof box body (17); the second dustproof mesh plate (20) is an arc-shaped dustproof mesh plate, and a plurality of protruding blocks (24) are provided on the end surface of the arc-shaped dustproof mesh plate facing the first dustproof mesh plate (19), and the plurality of protruding blocks (24) are in contact with the first dustproof mesh plate (19).

6. The fuel cell stack cooling system according to claim 5, characterized in that: The arc-shaped dustproof mesh plate is an elastic arc-shaped mesh plate; when a plurality of protruding blocks (24) are in contact with the first dustproof mesh plate (19), the elastic arc-shaped mesh plate is in an elastically compressed state.

7. The fuel cell stack cooling system according to claim 6, characterized in that: The inner ends of both sides of the dust collecting groove (18) are provided with second slide grooves, and the outer ends of both sides of the first dustproof screen plate (19) are provided with second slide bars (23), and the second slide bars (23) are embedded in the second slide grooves; the bottom end of the dust collecting groove (18) is embedded with a first magnet block corresponding to the position of the second slide bar (23), and the bottom end of the second slide bar (23) is fixed with a second magnet block, and the first magnet block and the second magnet block are magnetically attracted to each other; A third magnet block (22) is fixedly provided on both sides of the top of the first slide bar (21), and a fourth magnet block is embedded in the top plate of the dustproof box (17) at a position corresponding to the third magnet block (22), and the third magnet block (22) and the fourth magnet block are magnetically attracted to each other.

8. The fuel cell stack cooling system according to claim 7, characterized in that: The top height of the second dustproof mesh plate (20) is flush with the top height of the dust collecting groove (18), and the top height of the dust collecting groove (18) is flush with the top height of the inner wall of the dustproof box (17); the top height of the first dustproof mesh plate (19) is flush with the outer wall height of the top plate of the dustproof box (17); the first dustproof mesh plate (19) is provided with a handle (25); The inner bottom wall of the dustproof box body (17) is provided with a limiting groove; the outer bottom wall of the dust collecting groove (18) is provided with a limiting protrusion; the limiting protrusion is matched and embedded in the limiting groove.

9. The fuel cell stack cooling system according to any one of claims 1 to 8, characterized in that: The outer dust cover (1) is a square air-permeable dust-proof net; the outer dust cover (1) has accommodating through holes corresponding to the positions of each pipeline (26); The bottom end of the supply chamber body (29) and the bottom end of the outer dust cover (1) are located on the same horizontal plane; The fuel cell stack (2) is provided with a stack connecting plate (3), and the fuel cell stack (2) is threadedly connected to a connecting plate on the outer dust cover (1) via the connecting plate.

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