Packaging device for fuel cell stack

Abstract

The invention relates to the technical field of electric pile packaging, and particularly discloses a packaging device for a fuel cell electric pile, and the device comprises a packaging shell, a front end plate, a blind end plate, a tool bottom plate, a positioning backer, a positioning column, a spring device and a pressure head, the positioning backer is designed into a first backer strip and a second backer strip in a sectional mode, and packaging is completed through disassembly in actual operation; the whole packaging device adopts integrated stacking, two reactor cores can be pressed and packaged at the same time, the packaging precision is guaranteed while the assembling efficiency is improved, the packaging process is more flexible due to the sectional design of the positioning backer, and the high requirement for the pressing head is reduced.

Description

Technical Field

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

[0002] With the country's strong support for the development of new energy, fuel cells are widely used in the automotive field, which has the advantages of high efficiency and zero emissions. However, in actual operation, fuel cell engines need to face complex road conditions, so there are high requirements for the vibration and impact resistance of the stack, and thus there are high requirements for the packaging and protection of the stack.

[0003] The existing battery stack packaging technology generally involves pressing the battery stack to a target pressure on a press, fixing it with straps or bolts, and then placing it in a shell for packaging. There is also an integrated packaging method in which the battery stack is directly pressed to a target pressure and then directly put on a shell for packaging.

[0004] The technology of fixing with bolts or straps and then encapsulating with a shell has low space utilization and low stacking efficiency. The existing integrated stacking methods are mostly for the packaging of a single battery stack. When this technology is applied to the packaging of a dual stack, due to the high requirements for assembly accuracy and the limited space between the dual stacks, the requirements for the tooling design of the dual stack integrated packaging are higher. In addition, during the shell packaging process, the press opening height may be required to be high, increasing the cost of the press. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a packaging device for a fuel cell stack, which uses an integrated packaging method to press-package the stack, thereby solving the problems of low stacking efficiency caused by bolts or straps and low space utilization caused by dual stack packaging. The packaging using this device is easy but has high precision.

[0006] The present invention adopts the following technical solutions:

[0007] A packaging device for a fuel cell stack, the device comprising a packaging shell, a front end plate, a blind end plate, a tooling bottom plate, a positioning backer, a positioning column, a pressure head and a stack core to be packaged,

[0008] The stack cores to be packaged are arranged in two and arranged side by side, the packaging shell is arranged as a cavity in which the cores can be placed, the top of the packaging shell is provided with an opening matching the pressure column of the pressure head, one end of the two cores is fixedly connected to the front end plate, and the other ends of the cores of the two cores are respectively fixedly connected to the blind end plates, two blind end plates are provided, the front end plate is arranged on the tooling bottom plate, the positioning backing is closely arranged on the outside of the core, and the positioning column is closely arranged between the two cores.

[0009] The two fuel cell cores share a common front end plate and use blind end plates respectively to ensure the stability of the core. The core is fixed in place by setting positioning backrests and positioning columns to facilitate the downward packaging of the packaging shell.

[0010] Furthermore, there are 8 positioning backers and 4 positioning columns. The positioning backers are evenly arranged around the two side-by-side cores, and the positioning columns are arranged in pairs between the two cores.

[0011] The front end plate is provided with a first card slot fixed with the positioning backer and a second card slot fixed with the positioning column, the first card slot is provided with 8, the second card slot is provided with 4, the two blind end plates are provided with a third card slot, the third card slot is provided with 8 in total and fixed with the positioning backer,

[0012] The positioning backrest and the positioning column are tightly fixed around and between the core through the slots, which can ensure the stability of the core to a greater extent.

[0013] Further, the positioning backing includes a first backing bar and a second backing bar, the first backing bar and the second backing bar are detachably connected, the first backing bar is arranged at the upper half of the core, and the second backing bar is arranged at the lower half of the core.

[0014] The second backrest bar is configured as an H-shaped structure, and is provided with a first column and a second column, the first column cooperates with the first slot, the second column is provided with a base, a second opening is provided on the base and is fixedly connected to the tooling bottom plate by bolts, and the first backrest bar cooperates with the third slot.

[0015] Furthermore, a spring device is provided on the blind end plate, and a plurality of spring devices are provided. The setting of the spring can compensate for the stress relaxation generated in the core during actual operation and reduce the attenuation of the loading force. The position of the spring device corresponds to the downward pressing position of the pressure column of the pressure head.

[0016] Furthermore, at the connection between the first backing bar and the second backing bar, the first backing bar is provided with a protruding structure, and the second backing bar is provided with a groove, and the groove is provided with a smooth arc structure. Such a configuration can prevent the connection between the first backing bar and the second backing bar of the positioning backing from being excessively uneven due to tolerance differences, thereby preventing a jamming phenomenon from occurring during the packaging process.

[0017] Preferably, a first opening is provided at the connection between the first backing bar and the second backing bar, and a detachable connection is achieved by bolts.

[0018] Furthermore, the packaging shell and the top of the pressure head are provided with openings corresponding to the positioning posts, which are used to extract the positioning posts after packaging is completed.

[0019] The present invention provides a packaging device for a fuel cell stack, which fixes the core in position by arranging a positioning backrest and a positioning column, and the positioning backrest is split into two parts. By disassembling it during the packaging process, the problem of being unable to continue packaging downwards due to the pressure column of the pressure head being not long enough can be avoided. In actual operation, the first backrest bar is installed first for packaging. When the pressure head is not long enough to continue pressing down, the second backrest bar is installed and the first backrest bar is removed to continue packaging, thereby reducing the opening height requirement for the pressure head press.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. The packaging device for a fuel cell stack provided by the present invention positions and fixes the stack core by designing a positioning backer and a positioning column. Different from the traditional fixing by bolts or straps, it can make full use of space, has higher efficiency and better fixing effect;

[0022] 2. The packaging device for a fuel cell stack provided by the present invention can package a double stack in an integrated manner, and directly cover the packaging shell after the stack core is pressed to the target pressure;

[0023] 3. The present invention provides a packaging device for a fuel cell stack, which splits the positioning backrest into two parts and can be flexibly disassembled during the packaging process to avoid the inability to continue pressing down due to the pressure head and pressure column being not long enough, thereby reducing the requirements for the pressure head and the press and ensuring the packaging accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a packaging device for a fuel cell stack provided by the present invention;

[0025] Figure 2 A schematic diagram of the front end plate structure of a packaging device for a fuel cell stack provided by the present invention;

[0026] Figure 3 A schematic structural diagram of a positioning backer for a packaging device for a fuel cell stack provided by the present invention.

[0027] Figure 4 A packaging process diagram of a packaging device for a fuel cell stack provided by the present invention;

[0028] Figure 5 A packaging process diagram of a packaging device for a fuel cell stack provided by the present invention;

[0029] Explanation of reference numerals: 1. core; 2. front end plate; 3. blind end plate; 4. spring device; 5. packaging shell; 6. tooling bottom plate; 7. pressure head; 8. positioning backrest; 9. positioning column; 21. first slot; 22. second slot; 31. third slot; 81. first backrest bar; 82. second backrest bar; 811. first opening; 821. second opening; 812. protrusion structure; 822. groove; 823. first column; 824. second column. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] Combination Figure 1-Figure 2 As shown, the present invention discloses a packaging device for a fuel cell stack, which specifically includes: a stack core 1, a front end plate 2, a blind end plate 3, a spring device 4, a packaging shell 5, a tooling bottom plate 6, a pressure head 7, a positioning backer 8 and a positioning column 9,

[0033] The number of the stack cores 1 to be packaged is set to two and arranged side by side, the packaging shell 5 is set to be a cavity in which the core can be placed, the top of the packaging shell 5 is provided with an opening matching the pressure head 7, one end of the two cores 1 is fixedly connected to the front end plate 2, and the other ends of the cores of the two cores are respectively fixedly connected to the blind end plates 3, and two blind end plates 3 are provided. The front end plate 2 is set on the tooling bottom plate 6, the positioning backing 8 is closely set on the outside of the core 1, and the positioning column 9 is closely set between the two cores 1. The spring device 4 is set on the two blind end plates 3, and each blind end plate 3 is provided with three spring devices 4. The position of the spring device 4 corresponds to the position of the pressure column of the pressure head 7 when it is working. The packaging shell 5 and the top of the pressure head 7 are both provided with openings corresponding to the positioning columns 9.

[0034] Among them, there are 8 positioning supports 8 and 4 positioning columns 9. The positioning supports 8 are evenly arranged around the two side-by-side cores 1, and the positioning columns 9 are arranged in pairs between the two cores 1.

[0035] The front end plate 2 is provided with a first card slot 21 that cooperates with the positioning backer 8 and a second card slot 22 that cooperates with the positioning column 9. The first card slot 21 is provided with 8, and the second card slot 22 is provided with 4. The two blind end plates 3 are provided with a third card slot 31. The third card slot 31 is provided with 8 and cooperates with the positioning backer 8. The first card slot 21 and the third card slot 31 can achieve tight fixation of the positioning backer 8 and the core 1.

[0036] The positioning backrest 8 includes a first backrest bar 81 and a second backrest bar 82, the first backrest bar 81 and the second backrest bar 82 are connected by bolts through a first opening 811, the first backrest bar 81 is arranged on the upper half of the outer side of the core 1, the second backrest bar 82 is arranged on the lower half of the outer side of the core 1, the second backrest bar 82 is arranged in an H-shaped structure, the second backrest bar 82 is provided with a first column 823 and a second column 824, the first column 823 cooperates with the first slot 21, the second column 824 is provided with a base, the base is provided with a second opening 821 fixedly connected to the tooling bottom plate 6 by bolts, the first backrest bar 81 cooperates with the third slot 31,

[0037] Combination Figure 3 As shown, at the connection between the first backing bar 81 and the second backing bar 82, the first backing bar 81 is provided with a protrusion structure 812, and the second backing bar is provided with a groove 822. The groove 822 is provided with a smooth arc structure, which can prevent the connection between the first backing bar and the second backing bar of the positioning backing from being too smooth due to tolerance differences, thereby preventing a jamming phenomenon from occurring during the packaging process.

[0038] When actually packaging, first assemble, set the core on the front end plate, install the blind end plate and spring device on the other side of the core, then fix the positioning column through the second slot, fix the first backing bar through the third slot, place the packaging shell on top, and the pressure column of the pressure head contacts the spring device to press the core and the packaging shell downward; when the pressing position reaches Figure 4 At this time, since the length of the first backing bar is not enough, the second backing bar is connected to the first backing bar through the first opening, the first column of the second backing bar is fixed to the first slot, and the second column is fixed to the tooling bottom plate through the second opening by bolts to complete the installation of the second backing bar, and then continue to press down and package; when the pressure column of the pressure head is not long enough, that is, the pressing position reaches Figure 5 When the first backing bar is removed, the length of the positioning backing becomes shorter, and the downward pressure can be continued until the packaging shell and the core are completely packaged. Finally, the packaging shell and the front end plate are fastened, the positioning column is pulled out from the top of the packaging shell and the second backing bar is removed.

[0039] In summary, the packaging device for a fuel cell stack provided by the present invention adopts an integrated packaging method to press and package two stack cores at the same time. During the assembly process, a positioning structure of a positioning backrest and a positioning column is adopted to ensure the packaging accuracy, and the positioning backrest is arranged into a two-section design, which can be flexibly disassembled according to the situation during the packaging process, which can solve the problem that the pressure column of the pressure head is not long enough, thereby saving the press space of the pressure head, and a smooth transition structure is adopted between the first backrest bar and the second backrest bar to solve the problem of easy jamming of the bipolar plate caused by the segmented design, thereby improving the consistency of the stacking.

[0040] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A packaging device for a fuel cell stack, characterized in that: The device includes a packaging shell, a front end plate, a blind end plate, a tooling bottom plate, a positioning backing, a positioning column and a pressure head. The number of cores of the fuel cell stack is set to two and they are arranged side by side, the packaging shell is set to be a cavity in which the core can be placed, the top of the packaging shell is provided with an opening matching the pressure column of the pressure head, one end of the two cores is fixedly connected to the front end plate, and the other ends of the cores of the two cores are respectively fixedly connected to the blind end plates, there are two blind end plates, the front end plate is set on the tooling bottom plate, the positioning backing is closely set on the outside of the core, and the positioning column is closely set between the two cores.

2. A packaging device for a fuel cell stack according to claim 1, characterized in that: There are 8 positioning backrests and 4 positioning columns. The positioning backrests are evenly arranged around two side-by-side cores, and the positioning columns are arranged in pairs between the two cores.

3. A packaging device for a fuel cell stack according to claim 2, characterized in that: The front end plate is provided with a first card slot matched with the positioning backer and a second card slot matched with the positioning column, wherein eight first card slots are provided and four second card slots are provided.

4. A packaging device for a fuel cell stack according to claim 3, characterized in that: The positioning backrest includes a first backrest bar and a second backrest bar, the first backrest bar is detachably connected to the second backrest bar, the first backrest bar is arranged at the upper part of the outer side of the core, and the second backrest bar is arranged at the lower part of the outer side of the core.

5. A packaging device for a fuel cell stack according to claim 4, characterized in that: The second backrest bar is configured as an H-shaped structure, and the second backrest bar is provided with a first column and a second column, the first column cooperates with the first slot, and the second column is provided with a base, and the base is provided with a second opening fixedly connected to the tooling bottom plate through bolts.

6. A packaging device for a fuel cell stack according to claim 5, characterized in that: The blind end plate is provided with a third clamping slot for cooperating with the first backing bar to fix the first backing bar, and there are 8 third clamping slots.

7. A packaging device for a fuel cell stack according to any one of claims 1 to 6, characterized in that: The blind end plate is provided with a spring device, and a plurality of spring devices are provided. The position of the spring device corresponds to the downward pressing position of the pressure column of the pressure head.

8. The packaging structure for a fuel cell stack according to claim 6, characterized in that: At the connection between the first backing bar and the second backing bar, the first backing bar is provided with a convex structure, and the second backing bar is provided with a groove, the convex structure and the groove are cooperatively arranged, and the groove is arranged as a smooth arc structure.

9. A packaging structure for a fuel cell stack according to claim 8, characterized in that: A first opening is provided at the connection between the first backing bar and the second backing bar, and a detachable connection is achieved by bolts.

10. A packaging structure for a fuel cell stack according to claim 9, characterized in that: The packaging shell and the top of the pressure head are provided with openings corresponding to the positioning posts for extracting the positioning posts.

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