Fuel cell electricity leading device and fuel cell module

Abstract

The invention relates to the technical field of fuel cells, and discloses a fuel cell electricity leading device and a fuel cell module, the fuel cell electricity leading device is used for being connected with a current collection component of the fuel cell module, the fuel cell electricity leading device comprises a flexible wire, an electricity leading rod and a fixing assembly, the current collection component and the flexible wire are both arranged in a shell of the fuel cell module, and the electricity leading rod is arranged in the shell. One end of the flexible wire is connected with the current collection component, the other end of the flexible wire is connected with the electricity leading rod, a through hole corresponding to the electricity leading rod is formed in the shell, the other end of the electricity leading rod penetrates through the through hole and extends out of the shell, the electricity leading rod is sleeved with a detachable fixing assembly, and the fixing assembly is connected with the electricity collection component. The fixing assembly is used for fixing the electricity leading rod and the shell and sealing the through hole. The device has the beneficial effects that the position between the electric conduction rod and the current collection component can be adjusted, and meanwhile, the sealing effect between the electric conduction rod and the shell is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a fuel cell power supply device and a fuel cell module. Background Art

[0002] After the fuel cell generates electricity, it is necessary to connect the generated current to an external conductive structure through a current-leading device. Common current-leading devices generally use a metal rod as the current-leading rod. One end of the metal rod extends to the inside of the fuel cell stack shell to connect to the current collecting component, and the other end passes through a through hole opened on the shell to connect to the external conductive structure, thereby leading out the current generated by the fuel cell.

[0003] In the prior art, the metal rod is rigidly connected to the current collecting component during use, and its position cannot be adjusted after installation. When the metal rod is deformed due to assembly error or high temperature, the lead rod and the through hole are not coaxial, resulting in eccentricity, and the lead rod contacts the shell, resulting in insulation abnormality. In addition, since the position of the lead rod cannot be adjusted, the sealing structure between the lead rod and the shell cannot be adjusted accordingly, and is prone to failure, resulting in reduced performance of the fuel cell or even failure and scrapping. Summary of the invention

[0004] The purpose of the present invention is to provide a fuel cell power-introduction device and a fuel cell module, which are conducive to adjusting the position between the power-introduction rod and the current collecting component, and at the same time, improve the sealing effect between the power-introduction rod and the shell.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a fuel cell power-leading device for connecting to a current collecting component of a fuel cell module, comprising a flexible wire, a power-leading rod, and a fixing assembly. The current collecting component and the flexible wire are both arranged in a shell of the fuel cell module, one end of the flexible wire is connected to the current collecting component, and the other end is connected to the power-leading rod. A through hole corresponding to the power-leading rod is provided on the shell, and the other end of the power-leading rod passes through the through hole and extends to the outside of the shell. The power-leading rod is sleeved with a fixing assembly, and the fixing assembly is used to fix the power-leading rod to the shell and close the through hole.

[0006] Furthermore, the fixing assembly is detachably mounted on the power guide pole.

[0007] Furthermore, the fixing assembly includes a first seal, a second seal and a locking nut, the first seal is sleeved on the lead-in rod, located inside the shell, and abuts against the inner wall of the shell, the second seal and the locking nut are sleeved on the lead-in rod, and located outside the shell, the outer wall of the lead-in rod is provided with an external thread corresponding to the locking nut, and the locking nut fixes the second seal to the outer wall of the shell.

[0008] Furthermore, the first sealing member includes a first metal sheet and a first sealing ring which are sleeved on the lead-in rod, the first metal sheet is connected to the lead-in rod and is arranged close to the flexible wire, the first metal sheet is arranged in abutment with one end face of the first sealing ring, the first sealing ring is slidably connected to the lead-in rod, and the other end face is abutted against the inner wall of the shell.

[0009] Furthermore, the second sealing member includes a second metal sheet and a second sealing ring which are sleeved on the lead-in rod. The second sealing ring is slidably connected to the lead-in rod, and one end face is abutted against the outer wall of the shell. One end face of the second metal sheet is arranged in contact with the other end face of the second sealing ring, and the other end face of the second metal sheet is abutted against the locking nut.

[0010] Furthermore, the lead rod includes an optical axis section and a threaded section, the first sealing member and the second sealing member are sleeved on the optical axis section, and the locking nut is threadedly connected to the threaded section.

[0011] Furthermore, it also includes a receiving block, which is located in the shell and is used to connect the flexible wire and the lead pole. The receiving block is connected to one end of the lead pole located in the shell.

[0012] Furthermore, the receiving block, the flexible wire and the power guide rod are fixed by welding.

[0013] Furthermore, the power guide rod is coaxially arranged with the through hole, and the distance between the outer wall of the power guide rod and the inner wall of the through hole is greater than 25 mm.

[0014] Furthermore, an insulating sleeve is sleeved on one end of the power rod disposed outside the shell, and the bottom of the insulating sleeve is disposed in contact with the fixing assembly.

[0015] The present invention also provides a fuel cell module, comprising any one of the fuel cell power supply devices described above.

[0016] Compared with the prior art, the fuel cell power-inducing device and fuel cell module of the embodiment of the present invention have the following beneficial effects: including a flexible wire, a power-inducing rod, and a fixing assembly, wherein one end of the flexible wire is connected to the current collecting component, and the other end is connected to the power-inducing rod, a through hole corresponding to the power-inducing rod is provided on the shell, and the other end of the power-inducing rod passes through the through hole and extends outside the shell, and a detachable fixing assembly is provided on the outer sleeve of the power-inducing rod for fixing and sealing with the shell. Since a flexible wire is connected between the power-inducing rod and the current collecting component, the position of the power-inducing rod and the current collecting component can be adjusted, and the power-inducing rod and the through hole can always be kept coaxially arranged, thereby avoiding eccentricity of the power-inducing rod and increasing the reliability of insulation. In addition, the fixing assembly is detachably connected to the shell, and the fixing assembly is used to fix the power-inducing rod to the shell and close the through hole, and can be adjusted in position synchronously with the power-inducing rod, thereby improving the sealing effect between the power-inducing rod and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 2 is a schematic diagram of the structure of a fuel cell power introduction device according to an embodiment of the present invention;

[0018] Figure 2 It is an exploded view of the parts of the fuel cell power introduction device according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of a fuel cell module according to an embodiment of the present invention.

[0020] In the figure, 1, shell; 11, through hole; 2, flexible wire; 3, lead rod; 4, fixing assembly; 5, receiving block; 6, insulating sleeve; 31, optical axis section; 32, threaded section; 41, first sealing member; 411, first metal sheet; 412, first sealing ring; 42, second sealing member; 421, second metal sheet; 422, second sealing ring; 43, locking nut; a, current collecting component; b, fuel cell stack. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices and elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0024] like Figure 1 , Figure 2 As shown, a fuel cell power-inducing device of a preferred embodiment of the present invention is used to connect with the current collecting component a of the fuel cell module, including a flexible wire 2, a power-inducing rod 3, and a fixing assembly 4. The current collecting component a and the flexible wire 2 are both arranged in the housing 1 of the fuel cell. The purpose of arranging the current collecting component a in the housing 1 is that in the fuel cell, the current collecting component needs a high-temperature reaction to generate electricity. Therefore, the housing 1 will be sealed and insulated to keep the current collecting component a in a high-temperature environment to prevent loss of temperature from reducing the power generation efficiency of the current collecting component, and also to prevent flammable gas from entering the high-temperature environment and causing an explosion. The flexible wire 2 does not extend out of the housing 1 because the flexible wire has a flexible feature and is not easy to form a seal with the housing 1.

[0025] In order to facilitate the connection between the lead rod 3 and the conductive structure outside the shell 1, and to transmit the electric energy inside the fuel cell to the outside for use, a through hole 11 corresponding to the lead rod 3 is opened on the shell 1, one end of the flexible wire 2 is connected to the current collecting component a, and the other end is connected to the lead rod 3, and the other end of the lead rod 3 passes through the through hole 11 and extends outside the shell 1. Since the lead rod 3 and the current collecting component a are softly connected by the flexible wire 2, the position between the lead rod 3 and the current collecting component a can be adjusted so that the lead rod 3 is located in the center of the through hole 11. In order to facilitate the sealing of the connection between the lead rod 3 and the through hole 11, the lead rod 3 is provided with a fixing component 4 at the inner wall and outer wall of the shell 1 near the through hole 11 for fixing with the shell 1, and the through hole 11 is closed, the inside of the shell 1 is isolated from the external environment, and the sealing effect inside the shell 1 is maintained.

[0026] Furthermore, the fixing assembly 4 is detachably mounted on the power rod 3, so as to facilitate replacement and disassembly of the fixing assembly 4. In some other embodiments, the fixing assembly 4 and the power rod 3 can be welded and fixed based on the actual assembly requirements on the basis of satisfying the above-mentioned sealing conditions.

[0027] Specifically, the flexible wire 2 plays the role of conducting electricity and adjusting the position of the lead rod 3. In some embodiments, the flexible wire 2 is a soft metal cable, which is made of multiple steel wires wrapped around a fiber core, or multiple steel wires wrapped around a steel wire, which can meet the requirements of the fuel cell for conductivity and high temperature resistance. Since the flexible wire 2 is connected to the collector component a, when the position of the lead rod 3 deviates, the position of the lead rod 3 is first adjusted so that the lead rod 3 and the through hole 11 are coaxially arranged. The flexible wire 2 has a certain elasticity and meets the position adjustment requirements. Then, the fixing component 4 is used for fixing and sealing to prevent the lead rod 3 from contacting the housing 1 and reduce the risk of leakage.

[0028] It should be noted that in some embodiments, the current collecting component a can be first fixed to other connecting structures (such as a hard lead-in rod) as needed, and then connected to the flexible conductor 2, and finally the flexible conductor 2 is connected to the lead-in rod 3. In this embodiment, the connection structure can be designed to meet certain specific needs and at the same time achieve the purpose of adjusting the position of the lead-in rod 3.

[0029] Furthermore, in order to improve the stability of the connection between the current collecting component a, the flexible wire 2 and the lead rod 3, the current collecting component a and the flexible wire 2 are fixed by welding, and the flexible wire 2 and the lead rod 3 are also fixed by welding, such as Figure 1 As shown, when the axis between the flexible wire 2 and the lead pole 3 is in a vertical state, the contact area between the flexible wire 2 and the side wall of the lead pole 3 is small, and welding is difficult. Therefore, a receiving block 5 is further included. The receiving block 5 is located in the shell 1 and is used to connect the flexible wire 2 and the lead pole 3. The receiving block 5 is connected to one end of the lead pole 3 located in the shell 1. In order to ensure the welding strength between the receiving block 5 and the lead pole 3, the end surface area of ​​the receiving block 5 connected to the lead pole 3 is larger than the end surface area of ​​the lead pole 3.

[0030] Furthermore, in this embodiment, in order to reduce the risk of leakage caused by eccentric contact between the power rod 3 and the inner wall of the through hole 11, when the power rod 3 and the through hole 11 are coaxially arranged, the distance between the outer wall of the power rod 3 and the inner wall of the through hole 11 is greater than 25 mm.

[0031] Furthermore, in this embodiment, the fixing assembly 4 is used to insulate the conductive rod from the housing 1 and to ensure the sealing effect inside the housing 1 by closing the through hole 11. In order to facilitate the design of the fixing assembly 4 and meet the above functional requirements, refer to Figure 1 , Figure 2 The fixing assembly 4 includes a first seal 41 , a second seal 42 and a locking nut 43 , and the first seal 41 , the second seal 42 and the locking nut 43 are all sleeved on the lead pole 3 .

[0032] Specifically, the first sealing member 41 is sleeved on the lead rod 3 and is located inside the housing 1, and is abutted against the inner wall of the housing 1, and is used to seal the side of the through hole 11 located inside the housing 1. The second sealing member 42 and the locking nut 43 are sleeved on the lead rod 3 and are located outside the housing 1. The outer wall of the lead rod 3 is provided with an external thread corresponding to the locking nut 43. The locking nut 43 fixes the second sealing member 42 to the outer wall of the housing 1. The second sealing member 42 is used to seal the side of the through hole 11 located outside the housing 1. By forming a double seal on the inner and outer sides of the through hole 11, the stability of the overall sealing structure of the housing 1 is improved.

[0033] Furthermore, in order to facilitate the adjustment of the sealing effect of the first seal 41 and the second seal 42 on the through hole 11, the first seal 41 and the second seal 42 are detachably connected to the lead rod 3 through the locking nut 43. When the through hole 11 needs to be closed, the position between the first seal 41 and the shell 1 is fixed, and by tightening the locking nut 43, the second seal 42 moves along the axial direction of the lead rod 3 toward the outer wall of the shell 1, so that the bottom end face of the second seal 42 is in close contact with the outer wall of the shell 1, and the top end face of the first seal 41 is in close contact with the inner wall of the shell 1, thereby closing the through hole 11. The positions of the first seal 41 and the second seal 42 are adjusted synchronously by the locking nut 43 to meet the position adjustment requirements of the lead rod 3.

[0034] Furthermore, in order to facilitate the design of the structures of the first sealing member 41 and the second sealing member 42, facilitate disassembly and assembly, and reduce production costs, in some embodiments, the first sealing member 41 includes a first metal sheet 411 and a first sealing ring 412 sleeved on the lead rod 3. In this embodiment, since the first metal sheet 411 and the first sealing ring 412 are located in the housing 1, in order to facilitate the support of the first sealing ring 412 when the through hole 11 is sealed, the first metal sheet 411 is connected to the lead rod 3 and is arranged close to the flexible wire 2. The first metal sheet 411 and one end face of the first sealing ring 412 are arranged in abutment with each other, and the first sealing ring 412 is slidably connected to the lead rod 3, and the other end face is arranged against the inner wall of the housing 1. That is, the first sealing ring 412 is located between the first metal sheet 411 and the inner wall of the housing 1. In order to ensure the fixed connection strength between the first metal sheet 411 and the lead rod 3, the first metal sheet 411 and the lead rod 3 are fixed by welding.

[0035] Furthermore, in order to facilitate the assembly and fixation of the second sealing member 42 and the lead rod 3, in this embodiment, the second sealing member 42 includes a second metal sheet 421 and a second sealing ring 422 sleeved on the lead rod 3, the second sealing ring 422 is slidably connected to the lead rod 3, and one end face is abutted against the outer wall of the housing 1, one end face of the second metal sheet 421 is arranged in contact with the other end face of the second sealing ring 422, and the other end face of the second metal sheet 421 is abutted against the locking nut 43. That is, the second sealing ring 422 is arranged between the second metal sheet 421 and the outer wall of the housing 1. By tightening the locking nut 43, the lead-in rod 3 moves along the axial direction of the through hole 11 toward the direction of extending out of the shell 1, and the first metal sheet 411 moves synchronously and pushes the first sealing ring 412 to move in the direction of fitting the inner wall of the shell 1. At the same time, the second metal sheet 421 and the second sealing ring 422 both move in the direction of fitting the outer wall of the shell 1. That is, by tightening the locking nut 43, the lead-in rod 3, the first metal sheet 411, the first sealing ring 412, the second metal sheet 421, and the second sealing ring 422 act synchronously to achieve sealing of the through hole 11, which is convenient to adjust and easy to disassemble and assemble.

[0036] Furthermore, in order to ensure the sealing effect between the lead rod 3 and the first sealing ring 412 and the second sealing ring 422, and at the same time, facilitate the threaded connection with the locking nut 43, therefore, in this embodiment, the lead rod 3 includes an optical axis section 31 and a threaded section 32, wherein the first sealing member 41 and the second sealing member 42 are sleeved on the optical axis section 31, and the locking nut 43 is threadedly connected with the threaded section 32. Specifically, the inner diameters of the first sealing ring 412 and the second sealing ring 422 can be equal to the outer diameter of the optical axis section 31, and the optical axis section 31 cooperates with the first sealing ring 412 and the second sealing ring 422 to form a seal. In some other embodiments, in order to save the processing cost of the lead rod 3, the lead rod 3 can directly use a screw to process the optical axis section 31.

[0037] Furthermore, the structure where the first sealing ring 412 and the second sealing ring 422 contact the housing 1 is made of high temperature resistant material (such as fiber cotton), and other structures can be adjusted according to the structural strength and production requirements. For example, in order to achieve internal insulation, an insulating member can be added to the structure of the first sealing ring 412 and the second sealing ring 422, or other fixing members can be added. In this way, the sealing structure of the first sealing ring 412 and the second sealing ring 422 is ensured to be stable while having a good insulation effect.

[0038] Furthermore, since one end of the lead pole 3 outside the housing 1 is connected to the conductive structure, and the lead pole 3 is energized as a whole, in order to reduce the risk of electric shock caused by contact between equipment or workers and the lead pole 3, an insulating sleeve 6 is sleeved on one end of the lead pole 3 outside the housing 1, and the bottom of the insulating sleeve 6 is arranged in contact with the fixing component 4. Furthermore, in order to facilitate wiring when the lead pole 3 is connected to the external conductive structure, the distance from the top of the insulating sleeve 6 to the top of the lead pole 3 is greater than 30 mm, leaving enough wiring space.

[0039] This embodiment also provides a fuel cell module, such as Figure 3 As shown, it includes a current collecting component a, a fuel cell stack b, a shell 1 and a fuel cell power-leading device, wherein the current collecting component a and the fuel cell stack b are located in the shell 1, and the fuel cell power-leading device is connected to the current collecting component a, that is, the flexible wire 2 is connected to the current collecting component a, so as to lead out the power of the current collecting component a. Specifically, the fuel cell stack b has an electric output surface, and the electric output surface of the fuel cell stack b contacts the current collecting component a, so that the electric energy generated by the operation of the fuel cell stack is conducted through the current collecting component, and the conductive effect is good.

[0040] In this embodiment, since the fuel cell power supply device has a flexible structure, the position of the power supply rod 3 can be flexibly adjusted when the power supply rod 3 is sealed with the shell 1, so as to prevent the shell 1 from being deformed due to processing errors or high-temperature reactions of the current collecting components, resulting in the inability to completely seal the through hole 11. If the through hole 11 cannot be completely sealed, a large amount of heat inside the shell 1 will escape, and the temperature conditions for the electrochemical reaction of the fuel cell stack cannot be reached inside the shell 1, which will reduce the power generation efficiency of the entire fuel cell module.

[0041] In summary, the embodiment of the present invention provides a fuel cell power supply device, including a flexible wire 2, a power supply rod 3, and a fixing assembly 4, wherein one end of the flexible wire 2 is connected to the current collecting component a, and the other end is connected to the power supply rod 3, a through hole 11 corresponding to the power supply rod 3 is provided on the shell 1, and the other end of the power supply rod 3 passes through the through hole 11 and extends to the outside of the shell 1, and the power supply rod 3 is provided with a fixing assembly 4 for fixing and sealing with the shell 1. Since the flexible wire 2 is connected between the power supply rod 3 and the current collecting component a, the position of the power supply rod 3 and the current collecting component a can be adjusted, and the power supply rod 3 can always be kept coaxially arranged with the through hole 11, avoiding eccentricity of the power supply rod 3 and increasing the reliability of insulation. In addition, the fixing assembly 4 is detachably connected to the shell 1, and the fixing assembly 4 is used to fix the power supply rod 3 to the shell 1 and close the through hole 11, and can be adjusted synchronously with the power supply rod 3 to improve the sealing effect between the power supply rod 3 and the shell 1.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A fuel cell power supply device, used to connect to a current collecting component of a fuel cell module, characterized in that: It includes a flexible wire, a lead rod, and a fixing assembly. The current collecting component and the flexible wire are both arranged in the shell of the fuel cell module. One end of the flexible wire is connected to the current collecting component, and the other end is connected to the lead rod. A through hole corresponding to the lead rod is opened on the shell, and the other end of the lead rod passes through the through hole and extends to the outside of the shell. The lead rod is sleeved with a fixing assembly, and the fixing assembly is used to fix the lead rod to the shell and close the through hole.

2. The fuel cell power supply device according to claim 1, characterized in that: The fixing assembly includes a first seal, a second seal and a locking nut. The first seal is sleeved on the lead-in rod, located inside the shell, and abuts against the inner wall of the shell. The second seal and the locking nut are sleeved on the lead-in rod and located outside the shell. The outer wall of the lead-in rod is provided with an external thread corresponding to the locking nut. The locking nut fixes the second seal to the outer wall of the shell.

3. The fuel cell power supply device according to claim 2, characterized in that: The first sealing component includes a first metal sheet and a first sealing ring which are sleeved on the lead-in rod. The first metal sheet is connected to the lead-in rod and is arranged close to the flexible wire. The first metal sheet is arranged in abutment with one end face of the first sealing ring. The first sealing ring is slidably connected to the lead-in rod, and the other end face is abutted against the inner wall of the shell.

4. The fuel cell power supply device according to claim 2, characterized in that: The second sealing member includes a second metal sheet and a second sealing ring which are sleeved on the lead-in rod. The second sealing ring is slidably connected to the lead-in rod, and one end face is abutted against the outer wall of the shell. One end face of the second metal sheet is arranged in contact with the other end face of the second sealing ring, and the other end face of the second metal sheet is abutted against the locking nut.

5. The fuel cell power supply device according to claim 2, characterized in that: The lead rod comprises an optical axis section and a threaded section, the first sealing member and the second sealing member are sleeved on the optical axis section, and the locking nut is threadedly connected to the threaded section.

6. The fuel cell power supply device according to claim 1, characterized in that: It also includes a receiving block, which is located in the shell and is used to connect the flexible wire and the lead pole. The receiving block is connected to one end of the lead pole located in the shell.

7. The fuel cell power supply device according to claim 6, characterized in that: The receiving block, the flexible conductor and the lead pole are fixed by welding.

8. The fuel cell power supply device according to claim 1, characterized in that: The power-inducing rod is coaxially arranged with the through hole, and the distance between the outer wall of the power-inducing rod and the inner wall of the through hole is greater than 25 mm.

9. The fuel cell power supply device according to claim 1, characterized in that: An insulating sleeve is sleeved on one end of the lead rod arranged outside the shell, and the bottom of the insulating sleeve is arranged in contact with the fixing assembly.

10. A fuel cell module, characterized in that: It comprises a fuel cell power introduction device as described in any one of claims 1 to 9.

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