A fuel cell stack heat sink

Abstract

The application discloses a fuel cell stack heat dissipation device, which comprises a circular ring-shaped machine disc assembly, a fuel cell stack composed of a plurality of fuel cells, an annular support frame, a cooling pipeline, a circulating cooling system and a battery shell; the plurality of fuel cells are evenly distributed along the circumference with the center of the machine disc assembly as a reference and are slidingly installed on the machine disc assembly; the annular support frame comprises a plurality of support rods which are equidistantly distributed along the inner edge of the hollow circle of the machine disc assembly; each support rod is fixed on the machine disc assembly; the cooling pipeline is spirally wound on the support rods of the annular support frame; the battery shell is sleeved on the outside of the fuel cell stack; the machine disc assembly is fixedly installed on the inner bottom of the battery shell; the circulating cooling system is fixedly installed on the outer wall of the battery shell; the output port of the circulating cooling system is connected with the inlet end of the cooling pipeline; and the output port of the circulating cooling system is connected with the outlet end of the cooling pipeline, so that the heat dissipation effect and the cooling effect of the fuel cell are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery heat dissipation, in particular to a fuel cell stack heat dissipation device. BACKGROUND

[0002] With the wide application of hydrogen fuel cells in the fields of automobiles, distributed power generation, etc., the heat dissipation problem has become a key factor affecting performance and service life. A large amount of heat is generated during the operation of hydrogen fuel cells. If the heat cannot be dissipated in time and effectively, the battery temperature will be too high, which will cause performance degradation, service life shortening and even safety hazards.

[0003] Traditional battery stacks are mostly arranged in a rectangular layout, which has many disadvantages in heat dissipation. On the one hand, the gaps inside the battery stack arranged in a rectangular layout are narrow, the air circulation is not smooth, and the natural convection heat dissipation effect is poor, so that the heat generated by the battery during operation is difficult to dissipate quickly, which easily causes local temperature to be too high, affecting the performance and service life of the battery. On the other hand, in the traditional heat dissipation method, only the outside of the battery stack can be cooled and dissipated. Since the internal structure of the battery stack is compact, the cooling pipe cannot penetrate into the interior, and cannot effectively radiate to the internal area of the battery stack, so that the internal battery cannot be fully cooled, further aggravating the unevenness of the temperature distribution of the battery stack. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a fuel cell stack heat dissipation device, which can improve the heat dissipation effect of the battery and improve the uniformity of the battery temperature distribution.

[0005] In order to achieve the above purpose, the present application discloses a fuel cell stack heat dissipation device, which comprises a circular ring-shaped machine disc assembly, a fuel cell stack, an annular support frame, a cooling pipe, a circulating cooling system and a battery shell.

[0006] The fuel cell stack comprises a plurality of fuel cells; the plurality of fuel cells are uniformly distributed along the circumference with the center of the machine disc assembly as the reference; the bottom of each fuel cell is slidingly installed on the peripheral installation area of the machine disc assembly;

[0007] The annular support frame comprises a plurality of support rods; wherein the plurality of support rods are equally distributed along the inner edge of the hollow circle of the machine disc assembly; the bottom of each support rod is fixed to the inner edge installation area of the hollow circle of the machine disc assembly;

[0008] The cooling pipe is installed inside the fuel cell stack; the cooling pipe is spirally wound on each support rod of the annular support frame;

[0009] The battery shell is sleeved on the outside of the fuel cell stack; the machine disc assembly is fixedly installed on the inner bottom of the battery shell;

[0010] The circulating cooling system is fixedly installed on the outer wall of the battery shell; an output port of the circulating cooling system is connected with the inlet end of the cooling pipeline through an inflow pipeline; and the output port of the circulating cooling system is connected with the outlet end of the cooling pipeline through a backflow pipeline.

[0011] The application discloses a fuel cell stack heat dissipation device, which breaks the limitation of traditional rectangular structure on air flow and cooling by a circular ring-shaped machine disc assembly and a circumferential distribution layout of a fuel cell stack, and improves the heat dissipation and cooling effect. The fuel cells are evenly distributed along the periphery of the machine disc to form an annular array, so that the gap between the fuel cells forms a natural convection channel, and the air flow is enhanced. The annular support frame is fixed at equal intervals on the inner edge of the hollow circle of the machine disc through support rods to form an internal support structure, and the spiral cooling pipeline is wound around the support rods, so that the coolant can flow axially along the support rods in a spiral manner, and deeply enters the internal area of the stack for heat exchange, thereby solving the problem of internal cooling blind area, improving the heat dissipation effect of the fuel cell, and forming a heat dissipation space through the fixed cooperation of the fuel cell shell and the machine disc assembly. In combination with external installation and pipeline connection of a circulating cooling system, the forced circulation of the coolant in the spiral pipeline is realized, and the uniform cooling effect on the whole stack is strengthened.

[0012] As a preferred example, the machine disc assembly comprises a circular ring-shaped machine disc and a plurality of racks.

[0013] The machine disc is fixedly installed in the interior of the battery shell.

[0014] The plurality of racks are evenly distributed on the upper surface of the machine disc along the radial direction with the center of the machine disc as a reference; and the bottom of each fuel cell is fixedly installed on the installation area of the corresponding rack.

[0015] In the above scheme, the fixed installation of the circular ring-shaped machine disc provides a stable support basis for the fuel cell stack. The design that the racks are evenly distributed along the radial direction of the center of the machine disc enables the fuel cells to be arranged in a circumferential direction with the machine disc as the center, thereby avoiding the problem of poor internal air flow caused by the traditional rectangular layout. The installation area on each rack fixes the bottom of the fuel cell at a specific position, which not only ensures the stability of the fuel cell, but also provides space for the subsequent spiral winding of the cooling pipeline and optimization of the heat dissipation path. The radial distribution of the racks further enhances the structural adaptability between the fuel cell stack and the cooling pipeline, so that the heat can be dissipated through radial conduction and circumferential circulation, thereby improving the overall heat dissipation efficiency.

[0016] As a preferred example, the machine disc assembly further comprises a tooth ring and a plurality of gears.

[0017] The tooth ring is rotationally connected to the hollow circular inner edge of the machine disc; each gear is meshingly connected to the tooth ring;

[0018] A plurality of gears are rotationally connected to the hollow circular inner edge of the machine disc; each gear is meshingly connected to the corresponding toothed rack.

[0019] In the above scheme, the linkage structure of the tooth ring and the gear is introduced to realize dynamic adjustment of the fuel cell position, thereby optimizing the cooling path. The tooth ring is rotationally connected to the hollow circular inner edge of the machine disc, so that the tooth ring can rotate around the center of the machine disc, providing a power transmission basis for the overall structure. Each gear is meshingly connected to the tooth ring, converting the rotational motion of the tooth ring into the rotation of the gear, and the meshing connection of the gear and the corresponding toothed rack can convert the rotation of the gear into the radial linear motion of the toothed rack. Through the three-stage transmission relationship of the tooth ring, the gear and the toothed rack, the radial positions of all toothed racks can be adjusted synchronously, thereby driving the fuel cells fixed on the toothed racks to move radially along the machine disc. This linkage mechanism allows the spacing between the fuel cells to be dynamically adjusted according to the heat dissipation requirements, thereby changing the coverage range of the spiral cooling channels formed by the cooling pipes inside the fuel cell stack, and improving the cooling efficiency of the internal area.

[0020] As a preferred example, the fuel cell stack heat dissipation device further comprises a driving mechanism; wherein the driving mechanism comprises a rotating disc, a slide rod, a worm ring tooth, a worm and a first driving motor;

[0021] The top end of the slide rod is fixedly connected to the bottom end of any one of the gears; the bottom end of the slide rod is slidingly connected to the spiral slot opened in the rotating disc;

[0022] The worm ring tooth is fixedly connected to the outer surface of the rotating disc;

[0023] One end of the worm is meshingly connected to the worm ring tooth through a mounting bracket fixed to the inner bottom of the battery housing; the other end of the worm is connected to the first driving motor;

[0024] The first driving motor is fixedly installed on the outer wall of the battery housing and is used to drive the rotation of the worm.

[0025] The linkage driving mechanism realizes dynamic adjustment of the internal structure of the fuel cell stack. The rigid connection between the top end of the slide rod and the bottom end of the gear forms a transmission fulcrum, and the sliding fit between the bottom end and the spiral groove of the rotating disc converts the rotary motion into linear displacement, causing the gear set to produce axial displacement changes. The integrated design of the worm ring teeth and the rotating disc transmits the rotational torque of the worm to the rotating disc, and the rotational speed and direction of the worm are precisely controlled by the first driving motor, which ultimately drives the radial contraction or expansion of the support frame structure. This mechanical linkage mechanism enables the cooling pipeline to change the tightness of the winding with the dynamic adjustment of the fuel cell stack structure, optimizing the contact area between the cooling medium and the battery cells, and simultaneously adjusting the distributed spacing of the fuel cell through the gear and rack system, thereby solving the problem of the traditional fixed structure that cannot adapt to the changing heat dissipation requirements under different working conditions

[0026] As a preferred example, the fuel cell stack heat dissipation device further comprises an adaptive air supply device; wherein the adaptive air supply device comprises a blowing frame, a second driving motor, a blowing fan and a wind guide frame;

[0027] The blowing frame is fixedly installed at the top opening of the battery housing; the outer contour size of the blowing frame is consistent with the size of the top opening;

[0028] The blowing fan is fixedly installed inside the blowing frame, and one end of the blowing fan is connected with the second driving motor;

[0029] The second driving motor is fixedly installed on the outer surface of the top of the blowing frame for driving the blowing fan;

[0030] The wind guide frame is distributed between the cooling pipeline and the blowing frame and is fixedly connected with the inner side wall of the battery housing.

[0031] The above scheme enhances the heat dissipation efficiency of the cooling pipeline inside the battery stack by introducing a forced air supply device and a wind guide structure. The blowing frame and the top opening of the battery housing are installed in size matching to ensure that the air supply device covers the entire heat dissipation area and avoids air leakage. The second driving motor directly drives the blowing fan to produce directional airflow, providing a motive power source for heat dissipation. The wind guide frame is fixed to the inner wall of the battery housing, forming an airflow guiding channel between the cooling pipeline and the blowing frame, and concentrating the airflow generated by the blowing fan to the annular support frame area where the cooling pipeline is located, thereby strengthening the convective heat dissipation effect of the spiral cooling pipeline. This device breaks through the limitations of traditional natural convection heat dissipation by combining forced air supply and flow guide structure, especially improving the air flow in the internal area of the stack, so that the heat exchange efficiency of the cooling pipeline is improved.

[0032] As a preferred example, the wind guide frame adopts a bucket-shaped wind guide frame with a wide top and a narrow bottom.

[0033] The above scheme uses the gradually changing cross-sectional dimension of the air guide frame to accelerate the airflow during the flow process, thereby increasing the flow rate and coverage of the airflow in the cooling pipeline area. The wide top structure can accommodate a large area of airflow from the air guide frame, while the narrow bottom structure can concentrate and direct the airflow through the contraction flow channel, thereby enhancing the penetration of the airflow into the spiral cooling pipeline and avoiding uneven cooling caused by airflow diffusion. In addition, the guide path formed by the bucket-shaped structure can concentrate the airflow in the core heat dissipation area of the fuel cell stack, thereby enhancing the heat exchange efficiency between the cooling pipeline and the air.

[0034] As a preferred example, the top of the air guide frame is provided with a plurality of air inlet holes; wherein the plurality of air inlet holes are uniformly distributed circumferentially with the center of the top of the air guide frame as the reference.

[0035] The above scheme optimizes the introduction mode of external airflow by providing circumferentially uniformly distributed air inlet holes on the top of the air guide frame, thereby improving the heat dissipation efficiency. Specifically, the circumferential uniform distribution of the air inlet holes on the top of the air guide frame with the center as the reference allows the external airflow to enter the air guide frame uniformly from multiple directions, thereby avoiding uneven airflow distribution caused by single-direction air inlet. The circumferential layout of the air inlet holes further ensures that the cooling airflow generated by the air guide fan can uniformly cover the spiral-shaped cooling pipeline below, thereby enhancing the heat dissipation coverage of each region inside the fuel cell stack. In addition, the circumferential uniform distribution design with the center as the reference can form a spatial synergy with the annular layout of the fuel cell stack, thereby reducing the energy loss of the airflow during transportation and improving the overall efficiency of the heat dissipation system.

[0036] As a preferred example, the side wall of the battery shell is provided with a plurality of air outlet holes.

[0037] The above scheme provides a forced convection heat dissipation channel by providing air outlet holes on the side wall of the battery shell. When the hot air generated during the circulation of the cooling pipeline rises, the air flow path formed by the air outlet holes on the side wall can direct the hot air to be discharged outside the shell, thereby avoiding the accumulation of heat in the closed space. This lateral exhaust design can form a synergistic effect with the top air inlet structure, thereby removing the heat inside the battery stack through air flow acceleration, and improving the problem of heat dissipation blind area in the traditional device relying only on natural convection. The distribution density and position of the air outlet holes are optimized to ensure the uniformity of heat dissipation in different regions inside the shell, thereby reducing the risk of local overheating.

[0038] As a preferred example, the machine disc is provided with a plurality of bottom air outlet holes; wherein the plurality of bottom air outlet holes are uniformly distributed circumferentially with the center of the machine disc as the reference.

[0039] The above scheme optimizes the structure design of the machine disc, and sets the bottom air outlet holes in a circumferential uniform distribution on the machine disc to form a bottom heat dissipation channel. Specifically, the circumferential uniform distribution mode with the center of the machine disc as the reference can form a symmetrical layout of the bottom air outlet holes around the circumferential heat dissipation path of the fuel cell stack, ensure that the heat is uniformly discharged from different directions, and avoid the heat dissipation dead angle caused by uneven distribution of the heat dissipation holes in the local area. The opening position of the bottom air outlet hole forms a spatial correspondence relationship with the mounting area of the fuel cell stack, so that the heat generated at the bottom of the stack can be directly discharged outward through the bottom air outlet hole, solving the problem of heat accumulation caused by the bottom closure of the traditional structure. Through the circumferential uniform distribution of the hole structure design, the components such as the annular support frame and the cooling pipeline can also form a three-dimensional heat dissipation channel, and the synergistic effect of the bottom and side heat dissipation paths is strengthened.

[0040] As a preferred example, the fuel cell stack heat dissipation device further comprises a back air frame;

[0041] The inner side surface of the back air frame is arc-shaped.

[0042] The inner side surface of the back air frame is arc-shaped.

[0043] The outer side surface of the back air frame is located at the bottom of the bottom air outlet hole on the machine disc.

[0044] In the above scheme, by setting the back air frame on the lower surface of the machine disc, the arc-shaped structure of the inner side surface of the back air frame is used to guide and diffuse the airflow discharged from the bottom air outlet hole, reducing the local vortex or heat dissipation dead angle caused by the direct downward discharge of the airflow, thereby improving the heat dissipation efficiency of the bottom area. The corresponding position relationship between the outer side surface of the back air frame and the bottom air outlet hole of the machine disc can ensure that after the airflow is discharged from the air outlet hole, a uniform flow path is formed through the arc-shaped inner side surface of the back air frame, avoiding the disordered diffusion of the airflow, and further optimizing the uniformity of the overall temperature distribution inside the stack. The design of the arc-shaped inner side surface changes the direction of the airflow, prolongs the residence time of the airflow in the key heat dissipation area, and enhances the convection heat dissipation effect. The fixed installation mode of the back air frame and the machine disc ensures the stability of the structure, so that it can maintain the flow guiding function in the long-term operation. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0046] Figure 1 A schematic view of the cross-sectional structure of a fuel cell stack heat dissipation device according to an embodiment of the present application is shown in the figure.

[0047] Figure 2A perspective view of a fuel cell stack heat dissipation device according to an embodiment of the present application;

[0048] Figure 3 A perspective view of a fuel cell stack according to an embodiment of the present application;

[0049] Figure 4 A perspective view of a fuel cell stack according to an embodiment of the present application;

[0050] Figure 5 A perspective view of a circulating cooling pipe according to an embodiment of the present application;

[0051] Figure 6 A perspective view of a machine disc assembly according to an embodiment of the present application;

[0052] Figure 7 A perspective view of a machine disc assembly according to an embodiment of the present application;

[0053] Figure 8 A perspective view of a circulating cooling pipe according to an embodiment of the present application; Figure 7 A perspective view of a circulating cooling pipe according to an embodiment of the present application;

[0054] Figure 9 A perspective view of a circulating cooling pipe according to an embodiment of the present application;

[0055] Figure 10 A perspective view of a circulating cooling pipe according to an embodiment of the present application;

[0056] Figure 11 A perspective view of a circulating cooling pipe according to an embodiment of the present application;

[0057] Figure 12 A perspective view of a circulating cooling pipe according to an embodiment of the present application;

[0058] 1, a machine housing; 2, a circulating cooling pipe; 3, a hydrogen fuel cell; 4, a support rod; 5, a machine disc assembly; 6, a circulating cooling device; 7, a blower body; 8, a hopper-shaped air guide frame; 9, a driving mechanism; 10, an air outlet; 11, a connecting block; 51, a machine disc; 52, a bottom air hole; 53, a reverse air guide frame; 54, a rack; 55, a gear ring; 56, a gear; 71, a blower frame; 72, a blower fan; 73, a first motor; 74, an air inlet; 91, a rotating disc; 92, an Archimedes spiral slot; 93, a sliding rod; 94, a worm ring tooth; 95, a connecting frame; 96, a worm; 97, a second motor. DETAILED DESCRIPTION

[0059] In order to make the objects, technical solutions and advantages of the present application clearer, the following will clearly and completely describe the technical solutions in the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall into the scope of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," "having" and "with" and any variations thereof in this specification and in the claims are intended to cover both the inclusive and exclusive cases.

[0061] In the description of the embodiments of the present application, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0062] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification are not necessarily all referring to the same embodiment, or are necessarily mutually exclusive or alternative embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0063] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects.

[0064] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0065] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] In the existing fuel cell manufacturing process, a plurality of fuel cells are placed in a rectangular stacked form to form a fuel cell stack, and then a cooling channel is arranged outside the fuel cell stack to dissipate heat from the fuel cell. However, due to the narrow internal gap of the rectangularly placed battery stack, the air flow is not smooth, resulting in poor heat dissipation effect of the battery itself. It is difficult for the traditional cooling pipe to penetrate into the interior, and it cannot effectively radiate to the internal area of the battery stack, resulting in insufficient cooling of the internal battery, further exacerbating the unevenness of the temperature distribution of the battery stack.

[0067] To solve the technical problems of poor heat dissipation and poor cooling effect of the fuel cell in the prior art, the present embodiment provides a fuel cell stack heat dissipation device, which comprises a circular ring-shaped machine disc assembly, a fuel cell stack, a ring-shaped support frame, a cooling pipe, a circulating cooling system and a battery shell, for improving the heat dissipation effect of the fuel cell stack.

[0068] Specifically, to solve the problem of poor heat dissipation effect caused by the narrow space of the rectangular battery stack in the prior art, the present embodiment provides a ring-shaped fuel cell stack and a machine disc assembly for fixing the position of the ring-shaped fuel cell stack in the fuel cell stack heat dissipation device. Wherein the ring-shaped fuel cell stack comprises a plurality of fuel cells; a plurality of the fuel cells are uniformly distributed along the circumference with the center of the machine disc assembly as the reference; the bottom of each fuel cell is slidingly installed on the peripheral installation area of the machine disc assembly, so as to break the limitation of traditional rectangular structure on air flow and cooling through the circular ring-shaped machine disc assembly and the circumferential distribution layout of the fuel cell stack, and improve the heat dissipation and cooling effect.

[0069] Secondly, in order to achieve uniform cooling inside the fuel cell stack, so as to improve the cooling effect of the fuel cell stack, the embodiment is provided with a ring-shaped support frame and a spiral cooling pipeline inside the fuel cell stack; wherein the ring-shaped support frame comprises a plurality of support rods equidistantly distributed along the inner edge of the hollow circle of the machine disc assembly, and the bottom of each support rod is fixed to the mounting area of the inner edge of the hollow circle of the machine disc assembly to fix the cooling pipeline. The ring-shaped support frame is equidistantly fixed to the inner edge of the hollow circle of the machine disc through the support rods to form an internal support structure, and the spiral cooling pipeline is wound around the support rods, so that the coolant can flow axially along the support rods in a spiral manner to exchange heat in the internal area of the stack, thereby solving the problem of internal cooling blind area and improving the heat dissipation effect of the battery.

[0070] Furthermore, in order to protect the fuel cell stack and the support rods, cooling pipelines and other structures inside the fuel cell stack, the battery housing is sleeved outside the fuel cell stack, and the machine disc assembly is fixedly installed at the inner bottom of the battery housing to form a heat dissipation space, and the external installation and pipeline connection of the circulating cooling system are combined to realize the forced circulation of the coolant in the spiral pipeline and strengthen the uniform cooling effect of the whole stack.

[0071] Finally, the circulating cooling system is fixedly installed on the outer wall of the battery housing; the output port of the circulating cooling system is connected with the inlet end of the cooling pipeline through an inflow pipeline; and the output port of the circulating cooling system is connected with the outlet end of the cooling pipeline through a backflow pipeline, so as to circulate and cool the cooling medium in the cooling pipeline through the circulating cooling system to ensure the cooling effect of the fuel cell.

[0072] In one embodiment of the present embodiment, referring to the device structure diagram shown in Figures 1 to 5 It can be seen that the present embodiment provides a fuel cell stack heat dissipation device comprising a machine disc assembly 5, a fuel cell stack composed of a plurality of fuel cells 3, a ring-shaped support frame composed of a plurality of support rods 4, a cooling pipeline 2, a circulating cooling system 6 and a battery housing 1.

[0073] Referring to the fuel cell stack shown in Figure 2 The fuel cell stack is provided with a cylindrical battery housing 1, and the machine disc assembly 5, the cooling pipeline 2, the fuel cell 3 and the support rod 4 are arranged inside the battery housing 1; and the machine disc assembly 5 is fixedly installed on the lower surface inside the battery housing 1 to fix the components such as the fuel cell 3 and the support rod 4 and improve the safety of the battery. It should be noted that the type of the fuel cell 3 is not limited, and the fuel cell 3 can be a hydrogen fuel cell, a solid oxide fuel cell or other chemical device that directly converts chemical energy of fuel into electrical energy.

[0074] like Figures 1 to 5 As shown in the schematic diagram of the device, the circulating cooling system 6 is fixedly installed on the outer wall of the battery casing 1, and the output port of the circulating cooling system 6 is connected to the inlet end of the cooling pipe 2, and the input port of the circulating cooling system 6 is connected to the outlet end of the cooling pipe 2; through the closed loop formed by the circulating cooling system 6 and the cooling pipe 2, the cooling medium flowing into the cooling pipe 2 is circulated and cooled to improve the cooling effect of the battery.

[0075] like Figures 1 to 5 As shown, several fuel cells 3 are evenly distributed circumferentially around the center of the disk assembly 5, forming a ring-shaped fuel cell stack. A certain gap exists between each pair of adjacent fuel cells 3, so that the cell slot on the outer side of each fuel cell 3 has a wide V-shaped opening, facilitating heat dissipation from the fuel cell stack to the outside, thereby improving the heat dissipation effect of the fuel cell 3. Specifically, to adapt to the heat dissipation requirements of the fuel cell stack, the bottom of each fuel cell 3 is slidably mounted on the outer mounting area of ​​the disk assembly 5. The size of the gap between two adjacent fuel cells 3 is controlled by the inward and outward sliding of the fuel cell 3, thereby controlling the heat dissipation effect of the fuel cell 3.

[0076] like Figures 1 to 5 As shown, in order to solve the technical problem of the inability to uniformly cool the inside of the battery in the prior art, this embodiment has a plurality of support rods 4 fixedly installed on the disk assembly 5 inside the plurality of fuel cells 3, perpendicular to the upper surface of the disk assembly 5. The plurality of support rods 4 are equidistantly distributed along the inner edge of the hollow circle of the disk assembly 5.

[0077] Furthermore, such as Figures 1 to 5 As shown, the cooling pipe 2 is installed inside the fuel cell stack. The cooling pipe 2 is spirally wound around each of the support rods 4 of the annular support frame. Through the spiral winding of the cooling pipe 2 on the support rods 4 and the annular arrangement of the fuel cell 3, the fuel cell is uniformly cooled from the inside to the outside, thereby improving the cooling effect of the fuel cell 3.

[0078] In the embodiment, when the bottom of the fuel cell is slidingly installed in the peripheral installation area of the machine disc assembly, in order to ensure the fixation of the fuel cell and the sliding control of the fuel cell, a circular ring-shaped machine disc, a plurality of racks, a gear ring and a plurality of gears are arranged in the machine disc assembly; the machine disc is fixedly installed in the inside of the battery shell; the plurality of racks are evenly distributed on the upper surface of the machine disc along the radial direction with the center of the machine disc as the reference; the bottom of each fuel cell is fixedly installed in the installation area of the corresponding rack; the gear ring is rotationally connected to the hollow inner edge of the machine disc; each gear is meshingly connected with the gear ring; the plurality of gears are rotationally connected to the hollow inner edge of the machine disc; and each gear is meshingly connected with the corresponding rack.

[0079] In an embodiment of the embodiment, referring to the device cross-sectional perspective view shown in Figure 1 and the machine disc assembly perspective view shown in Figure 6 , the machine disc assembly 5 includes a circular ring-shaped machine disc 51, a rack 54, a gear ring 55 and a gear 56.

[0080] As shown in Figure 1 and Figure 6 , the machine disc 51 is slidingly connected with a plurality of racks 54, and the bottom of each fuel cell 3 is fixedly installed on the rack 54 through a link block 11. The machine disc 51 is rotationally connected with a plurality of gears 56 which are meshingly connected with the plurality of racks 54, and the machine disc 51 is rotationally connected with a gear ring 55 which is meshingly connected with the plurality of gears 56. Among the corresponding connected rack 54 and gear 56, the movement of one rack 54 will drive the rotation of one gear 56, the rotation of one gear 56 will drive the rotation of the gear ring 55, the rotation of the gear ring 55 will drive the rotation of the other plurality of gears 56 through the other plurality of gears 56, and the rotation of the other plurality of gears 56 will drive the movement of the other plurality of racks 54. Through the transmission of the corresponding meshingly connected rack 54 and gear 56, the fuel cell 3 is moved, and then the fuel cell 3 is centrifugally moved or moved towards the center, so as to change the heat dissipation spacing size between each fuel cell 3 and realize the adjustment of the heat dissipation efficiency.

[0081] In the embodiment, in order to control the rotation of the rack and pinion in the machine disc assembly to realize the movement of the fuel cell stack, a driving mechanism is arranged to be connected with the machine disc assembly to drive the rotation of the rack and pinion. The driving mechanism comprises a rotating disc, a slide rod, a worm ring, a worm and a first driving motor. The top end of the slide rod is fixedly connected with the bottom end of any one of the pinions. The bottom end of the slide rod is in sliding connection with a spiral slot formed in the rotating disc. The worm ring is fixedly connected with the outer surface of the rotating disc. One end of the worm is in meshing connection with the worm ring through a mounting frame fixed to the inner bottom of the battery shell. The other end of the worm is connected with the first driving motor. The first driving motor is fixedly installed on the outer wall of the battery shell and is used to drive the rotation of the worm.

[0082] In the embodiment, referring to Figure 7 the provided machine disc sectional view and the provided enlarged schematic view of the three-dimensional structure, the embodiment provides a driving mechanism 9 comprising a rotating disc 91 rotatably connected to the bottom of the machine shell 1, a slide rod 93, a worm ring 94, a connecting frame 95, a worm 96 and a second motor 97. Figure 8

[0083] Referring to Figure 9 the provided schematic view of the three-dimensional structure of the rotating disc, the rotating disc 91 is provided with an Archimedes spiral slot 92.

[0084] As Figures 7 to 9 shown, one end of one rack 54 is fixedly connected with one end of the slide rod 93, and the bottom of the slide rod 93 is in sliding connection with the Archimedes spiral slot 92. The worm ring 94 is installed on the outer portion of the rotating disc 91. The worm 96 in meshing connection with the worm ring 94 is rotatably installed in the machine shell 1 through the connecting frame 95. The second motor 97 is installed on the outer portion of the machine shell 1 and is used to drive the rotation of the worm 96. Under the driving of the second motor 97, a plurality of racks 54 are driven to move towards or away from the center through a series of transmission components to change the heat dissipation spacing between each hydrogen fuel cell 3 and to realize the adjustment of the heat dissipation efficiency.

[0085] Referring to Figures 7 to 9 ​The connection between the driving mechanism 9 and the machine disc assembly 5 is shown. After the second motor 97 is started, the rotating disc 91 is driven to rotate through the worm 96 and the worm ring tooth 94. The Archimedes spiral groove 92 on the rotating disc 91 cooperates with the sliding rod 93 at one end of the rack 54. With the continuous rotation of the rotating disc 91, the sliding rod 93 smoothly slides along the Archimedes spiral groove 92, thereby driving the rack 54 connected thereto to move centripetally or centrifugally, realizing flexible adjustment of the heat dissipation spacing between each fuel cell 3, and further realizing real-time adjustment of the heat dissipation spacing according to the actual working state, greatly enhancing the adaptability of the heat dissipation device, ensuring that the fuel cell stack is always in the best heat dissipation state, and providing strong support for the stability and efficiency of its performance, and providing solid technical support for the wide application of fuel cell technology in various application scenarios.

[0086] In the process of heat dissipation and cooling of the fuel cell through the cooling pipeline and the gap between the fuel cells, in order to better improve the heat dissipation effect and cooling effect of the fuel cell, an adaptive air supply device can be provided in the fuel cell stack heat dissipation device to improve the heat dissipation effect and cooling effect of the battery through the adaptive air supply device. The adaptive air supply device includes a blowing frame, a second driving motor, a blowing fan, and a wind guide frame. The blowing frame is fixedly installed at the top opening of the battery shell. The outer contour size of the blowing frame is consistent with the size of the top opening. The blowing fan is fixedly installed inside the blowing frame, and one end of the blowing fan is connected with the second driving motor. The second driving motor is fixedly installed on the outer surface of the top of the blowing frame and is used to drive the blowing fan. The wind guide frame is distributed between the cooling pipeline and the blowing frame and is fixedly connected with the inner side wall of the battery shell.

[0087] In one embodiment of the present embodiment, a fuel cell stack heat dissipation device is provided, which comprises a battery shell, a circulating cooling pipeline, a fuel cell stack, and a heat dissipation device. Figure 10 The adaptive air supply device, i.e., the blowing machine body 7, is fixedly installed at the top opening of the machine shell 1. In order to ensure that the size of the blowing machine body 7 is adapted to the size of the top opening, the outer contour size of the blowing machine body 7 is consistent with the size of the top opening.

[0088] When the blowing machine body 7 is fixedly installed at the top opening, referring to Figure 1 and Figure 11 The blowing machine body 7 is located above the circulating cooling pipeline 2. The blowing machine body 7 includes a blowing frame 71 installed on the machine shell 1, a blowing fan 72 installed in the blowing frame 71, a first motor 73 installed on the blowing frame 71 to drive the blowing fan 72, and an air inlet hole 74 formed in the blowing frame 71.

[0089] Referring to Figure 11 and Figure 10The machine shell 1 is internally provided with a wide-top-narrow-bottom wind guide frame 8, which is located between the blower body 7 and the circulating cooling pipe 2; wherein the wind guide frame 8 is fixedly connected with the inner side wall of the machine shell 1, so that the air flow generated by the blower fan 72 can be guided downward by the wind guide frame 8, and the inner side of the battery stack can be precisely cooled according to the air flow.

[0090] In the present embodiment, when the fuel cell stack heat dissipation device is provided with an adaptive air blowing device to generate air flow to dissipate heat inside the fuel cell, in order to ensure the circulation of air flow inside and outside the device and improve the heat dissipation efficiency of the battery stack, a plurality of air outlet holes are formed in the inner side wall of the battery shell.

[0091] In one embodiment of the present embodiment, referring to the device structure diagram shown in Figure 2 and Figure 12 , a plurality of air outlet holes 10 are formed in the side edge of the machine shell 1; the lateral air outlet of the plurality of air outlet holes 10 corresponds to the outer side of the annular battery stack, thereby improving the heat dissipation efficiency of the battery stack.

[0092] In one embodiment of the present embodiment, when the downward air flow is realized by the wind guide frame, in order to realize multi-directional heat dissipation, a plurality of bottom air outlet holes are formed in the machine disc of the fuel cell stack heat dissipation device; wherein the plurality of bottom air outlet holes are uniformly distributed along the circumference with the center of the machine disc as the reference, and a reverse air frame is fixedly installed on the lower surface of the machine disc; wherein the inner side of the reverse air frame is arc-shaped; the outer side of the reverse air frame is located at the bottom of the bottom air outlet hole on the machine disc.

[0093] In one embodiment of the present embodiment, referring to the machine disc structure diagram shown in Figures 6 to 7 , a plurality of bottom air holes 52 are formed in the machine disc 51, and a reverse air frame 53 is installed on the lower surface of the machine disc 51; the inner side of the reverse air frame 53 is arc-shaped, and the outer side of the reverse air frame 53 is located at the bottom of the plurality of bottom air holes 52, so as to increase the reverse air effect by the arc-shaped inner side of the reverse air frame 53.

[0094] In the present embodiment, when the wind blows down, part of the wind will blow out from the bottom air hole 52 through the guidance of the reverse air frame 53, realizing the bottom air blowing heat dissipation of the plurality of hydrogen fuel cells 3; another part will realize the air blowing heat dissipation from the inner side to the outer side of the battery stack through the rebound of the arc surface of the reverse air frame 53 and the extrusion of the wind field, so as to realize the multi-directional heat dissipation effect, greatly improve the uniformity of the battery stack heat dissipation, avoid local overheating phenomenon, and provide solid guarantee for the stable and efficient operation of the hydrogen fuel cell.

[0095] Referring to Figures 1 to 12The fuel cell stack heat dissipation device shown in the embodiment provided in the present embodiment, when the fuel cell 3 needs to be cooled, the circulating cooling device 6 is opened to circulate the cooling medium flowing through the circulating cooling pipe 2, and the circulating cooling pipe 2 spirally wound on the support rod 4 cools the fuel cell 3 through the continuously flowing cooling medium inside, providing basic cooling protection for the inside of the battery stack. Start the blower body 7, the first motor 73 drives the blower fan 72 to operate, the external air flows into the air inlet hole 74, is guided to the fuel cell 3 and the circulating cooling pipe 2 through the bucket-shaped air guide frame 8, and is precisely blown to the circulating cooling pipe 2 and the inside of the battery stack, the circulating cooling pipe 2 cooperates with the air guide to realize efficient heat dissipation inside; the air outlet hole 10 on the side of the machine shell 1 quickly discharges the heat emitted from the outside of the battery stack, further improving the heat dissipation efficiency, when the wind blows to the machine disc assembly 5, part of the wind is guided through the air return frame 53, and is blown out from the bottom air hole 52 to dissipate heat at the bottom of the hydrogen fuel cell 3; part of the wind is bounced off the arc surface of the air return frame 53 and is extruded by the air field, and flows from the inside to the outside of the battery stack, forming a multi-directional heat dissipation pattern;

[0096] When the battery stack load changes and the heat dissipation efficiency needs to be adjusted, the second motor 97 is started. The second motor 97 drives the worm 96 to rotate, the worm 96 is engaged with the worm ring teeth 94 on the rotating disc 91, the rotating disc 91 rotates, the Archimedes spiral groove 92 on the rotating disc 91 interacts with the sliding rod 93, drives the connected rack 54 to move, and through the transmission of the gear 56 and the gear ring 55, the multiple racks 54 move synchronously, the heat dissipation distance between the hydrogen fuel cells 3 is changed, the distance is increased at high load to promote air circulation and strengthen heat dissipation; the distance is reduced at low load to maintain appropriate heat dissipation intensity, and the hydrogen fuel cell stack is always in the best heat dissipation state, ensuring stable performance and efficient operation.

[0097] The fuel cell stack heat dissipation device provided in the present embodiment, by arranging a plurality of fuel cells in a ring-shaped battery stack, the outer cell slot is V-shaped and wide, which increases the heat dissipation area, optimizes the air flow path, and facilitates efficient heat dissipation of the battery stack to the outside. At the same time, the ring-shaped battery stack distribution creates space for internal heat dissipation, the circulating cooling pipe installed in the ring-shaped hydrogen fuel cell through the support rod on the machine disc assembly cooperates with the bucket-shaped air guide frame which is wide at the top and narrow at the bottom to accurately guide the air generated by the blower body to the inside of the battery stack, improve the coupling effect of the blower body blowing and the circulating cooling pipe cooling, and realize accurate and efficient cooling of the inside. In addition, the ring-shaped battery stack structure enables the air to be evenly dissipated from the inside to the outside, effectively improving the uniformity of the battery stack temperature distribution, thereby helping to prolong the service life of the battery and ensure stable performance.

[0098] The blower body is driven by the first motor through the blower frame installed on the casing, the built-in blower fan and the air inlet hole, and can stably generate strong wind power. When the wind power blows down, part of the wind is guided from the bottom air hole through the air deflector, and the bottom of the hydrogen fuel cell is blown and cooled; another part of the wind is bounced by the arc surface of the air deflector and extruded by the wind field, and the wind is blown and cooled from the inside to the outside of the battery stack. At the same time, the air outlet hole arranged on the side can blow the wind in the vertical direction horizontally, so that the wind changes in multiple angles in the casing, realizes the blowing and cooling effect of multiple directions, greatly improves the uniformity of the battery stack cooling, avoids the local overheating phenomenon, and provides a solid guarantee for the stable and efficient operation of the hydrogen fuel cell.

[0099] After the second motor is started, the worm and the worm gear drive the rotating disc to rotate. The Archimedes spiral groove on the rotating disc cooperates with the sliding rod at one end of the rack, and the sliding rod slides along the Archimedes spiral groove stably with the continuous rotation of the rotating disc, thereby driving the rack connected thereto to move centripetally or centrifugally, realizing flexible adjustment of the heat dissipation distance between each hydrogen fuel cell, and further realizing real-time adjustment of the heat dissipation distance according to the actual working state, greatly enhancing the adaptability of the heat dissipation device, ensuring that the hydrogen fuel cell stack is always in the best heat dissipation state, and providing a solid technical support for the wide application of hydrogen fuel cell technology in various application scenarios.

[0100] It should be noted that the device embodiments described above are only schematic, and some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. In addition, in the device embodiment provided by the present application, the connection relationship between the modules indicates that there is a fixed connection, a rotating connection or other connection relationship between them. Those skilled in the art can understand and implement without creative labor.

[0101] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. A fuel cell stack heat dissipation device, characterized by comprising: The machine disc assembly, the fuel cell stack, the annular support frame, the cooling pipeline, the circulating cooling system and the battery shell are arranged in a ring shape. The fuel cell stack comprises a plurality of fuel cells, which are uniformly distributed along the circumference of the machine disc assembly with the center of the machine disc assembly as the reference point, and the bottom of each fuel cell is slidingly installed on the peripheral mounting area of the machine disc assembly. The annular support frame comprises a plurality of support rods, which are equidistantly distributed along the inner edge of the hollow circle of the machine disc assembly, and the bottom of each support rod is fixed on the inner edge mounting area of the hollow circle of the machine disc assembly. The cooling pipeline is installed inside the fuel cell stack, and the cooling pipeline is spirally wound on each support rod of the annular support frame. The battery shell is sleeved on the outside of the fuel cell stack, and the machine disc assembly is fixedly installed on the inner bottom of the battery shell. The circulating cooling system is fixedly installed on the outer wall of the battery shell, the output port of the circulating cooling system is connected with the inlet end of the cooling pipeline through an inflow pipeline, and the output port of the circulating cooling system is connected with the outlet end of the cooling pipeline through a return pipeline. The machine disc assembly comprises a machine disc in a ring shape and a plurality of racks, the machine disc is fixedly installed inside the battery shell, the racks are uniformly distributed on the upper surface of the machine disc along the radial direction with the center of the machine disc as the reference point, and the bottom of each fuel cell is fixedly installed on the mounting area of the corresponding rack. The machine disc assembly further comprises a gear ring and a plurality of gears, the gear ring is rotationally connected to the inner edge of the hollow circle of the machine disc, each gear is meshingly connected with the gear ring, a plurality of gears are rotationally connected to the inner edge of the hollow circle of the machine disc, and each gear is meshingly connected with the corresponding rack.

2. A fuel cell stack heat sink according to claim 1, wherein The drive mechanism comprises a rotating disc, a slide rod, a worm ring tooth, a worm and a first drive motor. The top end of the slide rod is fixedly connected with the bottom end of any one of the gears, and the bottom end of the slide rod is slidingly connected with the spiral slot in the rotating disc. The worm ring tooth is fixedly connected with the outer surface of the rotating disc. One end of the worm is meshingly connected with the worm ring tooth through a mounting bracket fixed on the inner bottom of the battery shell, and the other end of the worm is connected with the first drive motor. The first drive motor is fixedly installed on the outer wall of the battery shell and is used for driving the worm to rotate.

3. A fuel cell stack heat sink according to claim 1, wherein The adaptive air supply device comprises a blowing frame, a second drive motor, a blowing fan and a wind guide frame. The blowing frame is fixedly installed at the top opening of the battery shell, and the outer contour size of the blowing frame is consistent with the size of the top opening. The blowing fan is fixedly installed inside the blowing frame, one end of the blowing fan is connected with the second drive motor. The second drive motor is fixedly installed on the outer surface of the top of the blowing frame and is used for driving the blowing fan. The air guide frame is distributed between the cooling pipeline and the air blowing frame and is fixedly connected with the inner side wall of the battery shell.

4. A fuel cell stack heat sink according to claim 3, wherein The air guide frame is in the shape of a bucket with a wide top and a narrow bottom.

5. A fuel cell stack heat sink according to claim 4, wherein The top of the air blowing frame is provided with a plurality of air inlet holes, which are evenly distributed around the center of the top of the air blowing frame.

6. A fuel cell stack heat sink according to claim 1, wherein The side wall of the battery shell is provided with a plurality of air outlet holes.

7. A fuel cell stack heat sink according to claim 1, wherein The bottom of the machine disc is provided with a plurality of bottom air outlet holes, which are evenly distributed around the center of the machine disc.

8. A fuel cell stack heat sink according to any one of claims 1 to 7, wherein It also includes a back air guide frame. The back air guide frame is fixedly installed on the lower surface of the machine disc. The inner side of the back air guide frame is arc-shaped. The outer side of the back air guide frame is located at the bottom of the bottom air outlet hole on the machine disc.

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