CN209830710U - Full-automatic welding clamp for bipolar plate of hydrogen fuel cell - Google Patents
Full-automatic welding clamp for bipolar plate of hydrogen fuel cell Download PDFInfo
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- CN209830710U CN209830710U CN201920055117.8U CN201920055117U CN209830710U CN 209830710 U CN209830710 U CN 209830710U CN 201920055117 U CN201920055117 U CN 201920055117U CN 209830710 U CN209830710 U CN 209830710U
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Abstract
The utility model discloses a full-automatic welding fixture for a bipolar plate of a hydrogen fuel cell, which comprises a lower fixture, an upper permanent magnet and a lower permanent magnet; the upper permanent magnet is arranged in the upper clamp, the lower permanent magnet is arranged in the lower clamp, two connecting holes are formed in the side edge of the upper clamp, two positioning pins are arranged on the lower surface of the upper clamp in each closed frame of the profiling pressing plate, the profiling pressing plate is adsorbed on the upper clamp through the upper permanent magnet, and the lower clamp is fixedly arranged on the workbench through screws; the utility model discloses an improvement to bipolar plate welding jig's automation and to the heat altered shape and the unstable improvement of pressure that influence its precision utilize the natural suction effect of permanent magnet, make it have than the saving of the better absorption effort of electro-magnet and the energy to can not produce heat altered shape, the precision that makes processing can not change the performance of product because of being heated in batch production, improved production efficiency in full automated production, reduced manufacturing cost.
Description
Technical Field
The utility model relates to a bipolar plate welding technology field, specificly a hydrogen fuel cell bipolar plate full-automatic welding jig.
Background
A fuel cell is a power generation device that directly converts chemical energy of fuel into electric energy, and is also called an electrochemical generator. It is a fourth power generation technology following hydroelectric power generation, thermal power generation and atomic power generation. The bipolar plate is a core part of the fuel cell, and fuel hydrogen and oxygen are respectively introduced from an inlet, distributed to the bipolar plate of each single cell through a gas main channel of the galvanic pile, uniformly distributed to an electrode through the diversion of the bipolar plate, and contacted with a catalyst through an electrode support body to carry out electrochemical reaction; the bipolar plate is formed by welding the anode plate and the cathode plate in a combined manner, and the thickness of the anode plate and the cathode plate is only 0.1cm, so that the requirements on a welding machine and a clamp are extremely high, and the design of the clamp directly influences the welding quality and efficiency.
At present, use the most common centre gripping of electro-magnet in bipolar plate's welding jig, this kind of centre gripping mode is in the in-process of industrialization continuous production because the continuous inflow of electric current makes solenoid send more heat energy, heat energy makes bipolar plate's surface production heat altered shape through the transmission, thereby the precision that makes the product can not reach the design demand in the production of industrialization, consequently, how to improve bipolar plate fuel cell welded anchor clamps, make bipolar plate welding adapt to automatic production and the batch production of industrialization, it is because external heat production and adsorption affinity do not enough lead to the reduction of product welding quality to be the utility model discloses the problem that needs to solve.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problem, the utility model aims to provide a full-automatic welding jig of hydrogen fuel cell bipolar plate has solved following technical problem:
1) the adsorption force of the magnetic force on the profiling pressing plate is increased through the natural suction effect of the permanent magnet;
2) the position of the profiling pressing plate on the hydroxyl plate is accurately positioned under the action of the multi-point positioning pins and the positioning holes;
3) the position coincidence degree of the two unipolar plates is higher through fine adjustment of the pneumatic electromagnetic valve;
4) and the permanent magnet is used for avoiding the thermal deformation of the unipolar plate caused by the heat generated in batch production.
The purpose of the utility model can be realized by the following technical scheme:
a full-automatic welding clamp for a bipolar plate of a hydrogen fuel cell comprises a lower clamp, an upper permanent magnet and a lower permanent magnet; the upper permanent magnet is arranged in the upper clamp, the lower permanent magnet is arranged in the lower clamp, two connecting holes are formed in the side edge of the upper clamp, two positioning pins are arranged on the lower surface of the upper clamp in each closed frame of the profiling pressing plate, the profiling pressing plate is adsorbed on the upper clamp through the upper permanent magnet, and the lower clamp is fixedly arranged on the workbench through screws;
pulse switches for controlling the magnetic force of the upper permanent magnet and the lower permanent magnet are respectively arranged on the upper clamp and the lower clamp, a copying plate is arranged on the upper surface of the lower clamp, a welding groove is formed in a circuit welded by the bipolar plate by the copying plate, and the track of the welding groove corresponds to the welding line of the copying pressing plate;
the profiling plate is provided with two first positioning columns at intervals on a long edge at the edge of the welding groove, the first positioning columns are opposite to the second pneumatic valve and the third pneumatic valve, two second positioning columns are arranged at intervals on a short edge at the edge of the welding groove, and the second positioning columns are opposite to the first pneumatic valve.
As a further scheme of the utility model, be provided with a plurality of clamp plate locating holes on the profile modeling clamp plate, the clamp plate locating hole is provided with two in every seals the frame to the position of clamp plate locating hole is corresponding with the position of locating pin, and the outside of clamp plate locating hole is provided with in profile modeling clamp plate edge inboard and is used for the welded weld line.
As a further scheme of the utility model, first pneumatic valve is installed at the border position of the lower anchor clamps relative with the second reference column, and first pneumatic valve afterbody passes through the trachea and is connected to on the compressor, and first pneumatic valve front end fixed mounting is in the open slot, and first locating piece is installed to first pneumatic valve foremost, and first locating piece can be in the open slot level micromotion.
As a further aspect of the present invention, the second pneumatic valve is installed at the edge position of the lower clamp relative to the first positioning post, the tail of the second pneumatic valve is connected to the compressor through the air pipe, the front end of the second pneumatic valve is fixedly installed in the open slot, the second positioning block is installed at the foremost end of the second pneumatic valve, and the second positioning block can be horizontally moved in the open slot.
As a further aspect of the present invention, the third pneumatic valve is installed at the edge position of the lower clamp relative to the first positioning post, the tail of the third pneumatic valve is connected to the compressor through the air pipe, the front end of the third pneumatic valve is fixedly installed in the open slot, the third positioning block is installed at the foremost end of the third pneumatic valve, and the third positioning block can be horizontally moved in the open slot.
As a further scheme of the utility model, the locating pin connects in the closure at profile modeling clamp plate both ends the ear parallel with the limit of last anchor clamps, and the locating pin sets up at profile modeling clamp plate mid portion diagonal.
As a further aspect of the present invention, the lower fixture is provided with a positioning hole at a corresponding position of the positioning pin on the upper fixture.
As a further aspect of the present invention, the height of the height less than or equal to the positioning pin of the first positioning column and the second positioning column is greater than the thickness of the bipolar plate.
As a further aspect of the present invention, the open slot is provided with two at first reference column opposite direction positions, the open slot is provided with one at second reference column opposite direction positions, and the open slot is between the edge of the lower fixture and the position between the welding grooves.
As a further scheme of the utility model, go up anchor clamps and lower anchor clamps and go up first reference column and second reference column relevant position and be provided with first locating hole and second locating hole.
The utility model has the advantages that:
1. this full-automatic welding jig of hydrogen fuel cell bipolar plate is through last anchor clamps and lower anchor clamps through the permanent magnetic action of lower permanent magnet and last permanent magnet with the profile modeling clamp plate through the magnetic force effect adsorption and the shielding of magnetic force put down, the magnetic force of permanent magnet has been utilized to this kind of mode, the distribution only need can control the magnetic force of permanent magnet through pulse signal, greatly reduced the consumption of electric power, and the adsorption affinity of permanent magnet is more than the twice of solenoid, the clamping action that makes anchor clamps in accurate welding operation is more reliable, the magnetic force of permanent magnet does not produce heat, can not lead to the heat altered shape in the welding of millimeter level bipolar plate, fine protection welded product.
2. The first pneumatic valve, the second pneumatic valve and the third pneumatic valve control the positioning block to move towards the first positioning column and the second positioning column through the air pressure action and the first positioning column and the second positioning column, so that two hydrogen-oxygen unipolar plates placed on the lower clamp are well positioned before being clamped by the clamp, the thin unipolar plates are not extruded and deformed by the micro-movement, the welding positions of the unipolar plates can be more accurate by fine adjustment, and the qualification rate of products is higher; the positioning pin and the positioning hole, the first positioning column and the first positioning hole, and the second positioning column and the second positioning hole are completely matched with and position the welding positions of the bipolar plate and the copying pressing plate at different positions through all the holes and the pins, so that the welding positions are accurate and correct.
3. The utility model discloses an improvement to bipolar plate welding jig's automation and to the heat altered shape and the unstable improvement of pressure that influence its precision utilize the natural suction effect of permanent magnet, make it have than the saving of the better absorption effort of electro-magnet and the energy to can not produce heat altered shape, the precision that makes processing can not change the performance of product because of being heated in batch production, improved production efficiency in full automated production, reduced manufacturing cost.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is the overall structure schematic diagram of the middle and lower clamp of the present invention.
Fig. 2 is a schematic view of the top view structure of the lower clamp of the present invention.
Fig. 3 is a schematic view of the three-dimensional structure of the lower surface of the middle and upper clamp of the present invention.
Fig. 4 is a side partial sectional view of the lower clamp of the present invention.
Fig. 5 is a side partial sectional view of the upper clamp of the present invention.
Fig. 6 is a schematic structural view of the middle profiling pressing plate of the present invention.
Reference numerals: the upper permanent magnet 1, the lower fixture 2, the profile plate 21, the first positioning column 211, the first positioning hole 2111, the second positioning column 212, the second positioning hole 2121, the first pneumatic valve 22, the first positioning block 221, the second pneumatic valve 23, the second positioning block 231, the third pneumatic valve 24, the open slot 25, the third positioning block 241, the upper fixture 3, the connecting hole 31, the positioning pin 32, the positioning hole 321, the profile pressing plate 4, the pressing plate positioning hole 41, the welding line 42, the lower permanent magnet 5, the workbench 6 and the welding groove 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-6, the present invention relates to a full-automatic welding fixture for bipolar plates of hydrogen fuel cells, which comprises a lower fixture 2, an upper fixture 3, an upper permanent magnet 1 and a lower permanent magnet 5; the upper permanent magnet 1 is arranged in the upper clamp 3, the lower permanent magnet 5 is arranged in the lower clamp 2, two connecting holes 31 are formed in the side edge of the upper clamp 3, two positioning pins 32 are arranged on the lower surface of the upper clamp 3 in each closed frame of the copying press plate 4, the copying press plate 4 is adsorbed on the upper clamp 3 through the upper permanent magnet 1, and the lower clamp 2 is fixedly arranged on the workbench 6 through screws;
pulse switches for controlling the magnetic force of the upper permanent magnet 1 and the lower permanent magnet 5 are respectively arranged on the upper clamp 3 and the lower clamp 2, a profiling plate 21 is arranged on the upper surface of the lower clamp 2, a welding groove 7 is formed in a bipolar plate welding line of the profiling plate 21, and the track of the welding groove 7 corresponds to a welding line 42 of the profiling pressing plate 4;
the profile plate 21 is provided with two first positioning columns 211 on one long edge of the welding groove 7 at intervals, the first positioning columns 211 are opposite to the second air-operated valve 23 and the third air-operated valve 24, the profile plate 21 is provided with two second positioning columns 212 on one short edge of the welding groove 7 at intervals, and the second positioning columns 212 are opposite to the first air-operated valves 22.
The profiling pressing plate 4 is provided with a plurality of pressing plate positioning holes 41, two pressing plate positioning holes 41 are arranged in each closed frame, the positions of the pressing plate positioning holes 41 correspond to the positions of the positioning pins 32, welding lines 42 used for welding are arranged on the outer sides of the pressing plate positioning holes 41 and on the inner side of the edge of the profiling pressing plate 4, the profiling pressing plate 4 is made of metal materials with magnetic force adsorption, and laser welding is carried out in the welding lines 42 through tracks. Go up anchor clamps 3 and lower anchor clamps 2 through the permanent magnetic action of lower permanent magnet 5 and last permanent magnet 1 with the profile modeling clamp plate 4 through the magnetic force effect adsorption and the shielding of magnetic force put down, the magnetic force of permanent magnet has been utilized to this kind of mode, the distribution only need can control the magnetic force of permanent magnet through pulse signal, greatly reduced the consumption of electric power, and the adsorption affinity of permanent magnet is more than the twice of solenoid, the clamping action that makes anchor clamps in accurate welding operation is more reliable, the magnetic force of permanent magnet does not produce heat, can not lead to the heat altered shape in the welding of millimeter level's bipolar plate, fine protection welded product.
The first pneumatic valve 22 is installed at the edge position of the lower fixture 2 opposite to the second positioning column 212, the tail part of the first pneumatic valve 22 is connected to the compressor through an air pipe, the front end of the first pneumatic valve 22 is fixedly installed in the open slot 25, the first positioning block 221 is installed at the foremost end of the first pneumatic valve 22, and the first positioning block 221 can move horizontally and slightly in the open slot 25.
The second pneumatic valve 23 is installed at an edge position of the lower clamp 2 opposite to the first positioning post 211, a tail portion of the second pneumatic valve 23 is connected to the compressor through a pneumatic pipe, a front end of the second pneumatic valve 23 is fixedly installed in the open slot 25, a second positioning block 231 is installed at a foremost end of the second pneumatic valve 23, and the second positioning block 231 can move slightly in the open slot 25 horizontally.
The third pneumatic valve 24 is installed at the edge position of the lower fixture 2 opposite to the first positioning column 211, the tail of the third pneumatic valve 24 is connected to the compressor through a pneumatic pipe, the front end of the third pneumatic valve 24 is fixedly installed in the opening groove 25, the foremost end of the third pneumatic valve 24 is installed with a third positioning block 241, and the third positioning block 241 can move horizontally and slightly in the opening groove 25. The first pneumatic valve 22, the second pneumatic valve 23 and the third pneumatic valve 24 control the positioning blocks to move towards the first positioning column 211 and the second positioning column 212 through the air pressure action and the first positioning column 211 and the second positioning column 212, so that two hydrogen-oxygen unipolar plates placed on the lower fixture 2 are well positioned before being clamped by the fixture, the thin unipolar plates cannot be extruded and deformed due to micro-movement, the welding positions of the unipolar plates can be more accurately adjusted through micro-adjustment, and the qualification rate of products is higher.
The positioning pins 32 are parallel to the edges of the upper clamp 3 in the closed connecting lugs at the two ends of the profiling pressing plate 4, and the positioning pins 32 are arranged on the diagonal line of the middle part of the profiling pressing plate 4.
The lower clamp 2 is provided with a positioning hole 321 at a corresponding position of the positioning pin 32 on the upper clamp 3.
The heights of the first positioning column 211 and the second positioning column 212 are less than or equal to the height of the positioning pin 32, and the heights of the first positioning column 211 and the second positioning column 212 are greater than the thickness of the bipolar plate.
Two open grooves 25 are arranged at the opposite positions of the first positioning columns 211, one open groove is arranged at the opposite position of the second positioning columns 212, and the open groove 25 is arranged between the edge of the lower fixture 2 and the welding groove 7.
The upper clamp 3 is provided with a first positioning hole 2111 and a second positioning hole 2121 at positions corresponding to the first positioning column 211 and the second positioning column 212 on the lower clamp 2. The positioning pins 32, the positioning holes 321, the first positioning posts 211, the first positioning holes 2111, and the second positioning posts 212, the second positioning holes 2121 are completely matched with all the holes and pins at different positions to position the welding positions of the bipolar plate and the copying pressure plate, so that the welding positions are accurate.
The working mode of the full-automatic welding clamp for the bipolar plate of the hydrogen fuel cell comprises the following steps:
sequentially placing an oxygen unipolar plate and a hydrogen unipolar plate above the profile plate 21, wherein the oxygen unipolar plate and the hydrogen unipolar plate are placed on one side of the welding groove 7 of the first positioning column 211 and the second positioning column 212;
step two, the second pneumatic valve 23, the second positioning block 231 and the third pneumatic valve 24 are simultaneously started, the first positioning block 221 is respectively pushed to slightly move towards the second positioning column 212, the second positioning block 231 and the third positioning block 241 slightly move towards the first positioning column 211, and the position of the hydrogen-oxygen unipolar plate is adjusted;
step three, the upper clamp 3 horizontally moves towards the upper part of the lower clamp 2 through a telescopic cylinder, the upper clamp 3 is positioned above the hydrogen-oxygen unipolar plate through a photoelectric sensing switch, the upper clamp 3 is attached to the surface of the lower clamp 2 through a lifting pneumatic cylinder, at the moment, the first positioning column 211 is inserted into the first positioning hole 2111, the second positioning column 212 is inserted into the second positioning hole 2121, and the positioning pin 32 is inserted into the positioning hole 321;
starting an electric pulse switch, restoring the magnetic force of a lower permanent magnet 5 in a lower clamp 2, shielding the magnetic force of an upper permanent magnet 1 in an upper clamp 3, compacting a profiling pressure plate 4 on the hydrogen-oxygen unipolar plate, and moving the upper clamp 3 back to the original point;
and step five, when the hydroxyl plate is welded into a bipolar plate by laser, the upper clamp 3 is attached to the surface of the copying press plate 4 through horizontal and lifting actions, an electric pulse switch is started, the upper permanent magnet 1 in the upper clamp 3 recovers magnetic force, the lower permanent magnet 5 in the lower clamp 2 shields the magnetic force, and the upper clamp 3 adsorbs the copying press plate 4 to return to the original point position.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.
Claims (9)
1. A full-automatic welding clamp for a bipolar plate of a hydrogen fuel cell comprises a lower clamp (2) and an upper clamp (3), and is characterized by further comprising an upper permanent magnet (1) and a lower permanent magnet (5); the upper permanent magnet (1) is mounted inside the upper clamp (3), the lower permanent magnet (5) is mounted inside the lower clamp (2), two connecting holes (31) are formed in the side edge of the upper clamp (3), two positioning pins (32) are arranged on the lower surface of the upper clamp (3) in each closed frame of the profiling pressing plate (4), the profiling pressing plate (4) is adsorbed on the upper clamp (3) through the upper permanent magnet (1), and the lower clamp (2) is fixedly mounted on the workbench (6) through screws;
pulse switches for controlling the magnetic force of the upper permanent magnet (1) and the lower permanent magnet (5) are respectively arranged on the upper clamp (3) and the lower clamp (2), a profiling plate (21) is arranged on the upper surface of the lower clamp (2), a welding groove (7) is formed in the profiling plate (21) on a bipolar plate welding line, and the track of the welding groove (7) corresponds to a welding line (42) of the profiling pressing plate (4);
two first positioning columns (211) are arranged on one long edge of the welding groove (7) of the profile plate (21) at intervals, the first positioning columns (211) are opposite to the second pneumatic valve (23) and the third pneumatic valve (24), two second positioning columns (212) are arranged on one short edge of the welding groove (7) of the profile plate (21) at intervals, and the second positioning columns (212) are opposite to the first pneumatic valve (22);
the profiling pressing plate (4) is provided with a plurality of pressing plate positioning holes (41), two pressing plate positioning holes (41) are formed in each closed frame, the positions of the pressing plate positioning holes (41) correspond to the positions of the positioning pins (32), and welding lines (42) for welding are arranged on the outer sides of the pressing plate positioning holes (41) and on the inner side of the edge of the profiling pressing plate (4).
2. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell as claimed in claim 1, wherein the first pneumatic valve (22) is installed at the edge position of the lower fixture (2) opposite to the second positioning column (212), the tail part of the first pneumatic valve (22) is connected to the compressor through a gas pipe, the front end of the first pneumatic valve (22) is fixedly installed in the open slot (25), the foremost end of the first pneumatic valve (22) is provided with the first positioning block (221), and the first positioning block (221) can horizontally move slightly in the open slot (25).
3. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell according to claim 1, wherein the second pneumatic valve (23) is installed at an edge position of the lower fixture (2) opposite to the first positioning post (211), a tail part of the second pneumatic valve (23) is connected to a compressor through a gas pipe, a front end of the second pneumatic valve (23) is fixedly installed in the open slot (25), a second positioning block (231) is installed at the foremost end of the second pneumatic valve (23), and the second positioning block (231) can move slightly horizontally in the open slot (25).
4. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell according to claim 1, wherein the third pneumatic valve (24) is installed at an edge position of the lower fixture (2) opposite to the first positioning post (211), a tail part of the third pneumatic valve (24) is connected to a compressor through a gas pipe, a front end of the third pneumatic valve (24) is fixedly installed in the open slot (25), a third positioning block (241) is installed at the foremost end of the third pneumatic valve (24), and the third positioning block (241) can move slightly horizontally in the open slot (25).
5. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell as claimed in claim 1, wherein the positioning pins (32) are parallel to the edges of the upper fixture (3) in the closed connecting lugs at the two ends of the profiling pressing plate (4), and the positioning pins (32) are arranged diagonally in the middle part of the profiling pressing plate (4).
6. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell as claimed in claim 1, wherein the lower fixture (2) is provided with positioning holes (321) at corresponding positions of the positioning pins (32) on the upper fixture (3).
7. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell as claimed in claim 1, wherein the height of the first positioning column (211) and the second positioning column (212) is less than or equal to the height of the positioning pin (32), and the height of the first positioning column (211) and the second positioning column (212) is greater than the thickness of the bipolar plate.
8. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell as claimed in claim 2, wherein two open grooves (25) are arranged at opposite positions of the first positioning column (211), one open groove is arranged at opposite positions of the second positioning column (212), and the open groove (25) is arranged between the edge of the lower fixture (2) and the welding groove (7).
9. The full-automatic welding fixture for the bipolar plate of the hydrogen fuel cell as claimed in claim 1, wherein the upper fixture (3) and the lower fixture (2) are provided with a first positioning hole (2111) and a second positioning hole (2121) at positions corresponding to the first positioning column (211) and the second positioning column (212).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920055117.8U CN209830710U (en) | 2019-01-14 | 2019-01-14 | Full-automatic welding clamp for bipolar plate of hydrogen fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920055117.8U CN209830710U (en) | 2019-01-14 | 2019-01-14 | Full-automatic welding clamp for bipolar plate of hydrogen fuel cell |
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| Publication Number | Publication Date |
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| CN209830710U true CN209830710U (en) | 2019-12-24 |
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| CN201920055117.8U Active CN209830710U (en) | 2019-01-14 | 2019-01-14 | Full-automatic welding clamp for bipolar plate of hydrogen fuel cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109623245A (en) * | 2019-01-14 | 2019-04-16 | 安徽明天氢能科技股份有限公司 | A kind of hydrogen fuel cell bipolar plates full automatic welding welding fixture |
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2019
- 2019-01-14 CN CN201920055117.8U patent/CN209830710U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109623245A (en) * | 2019-01-14 | 2019-04-16 | 安徽明天氢能科技股份有限公司 | A kind of hydrogen fuel cell bipolar plates full automatic welding welding fixture |
| CN109623245B (en) * | 2019-01-14 | 2024-02-09 | 安徽明天氢能科技股份有限公司 | Full-automatic welding fixture for bipolar plate of hydrogen fuel cell |
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