CN216066196U

CN216066196U - Bipolar plate welding jig and welding equipment

Info

Publication number: CN216066196U
Application number: CN202122665864.3U
Authority: CN
Inventors: 王艳波; 刘峰
Original assignee: Datong Xinyan Hydrogen Energy Technology Co ltd
Current assignee: Datong Xinyan Hydrogen Energy Technology Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-03-18
Anticipated expiration: 2031-11-02

Abstract

The embodiment of the utility model provides a bipolar plate welding clamp and welding equipment, and relates to the field of bipolar plate production equipment. The bipolar plate welding clamp provided by the embodiment of the utility model comprises a first clamping plate and a second clamping plate which are oppositely arranged, and a polar plate to be welded is clamped between the first clamping plate and the second clamping plate when in use. One side that first splint are close to the second splint is provided with the boss, and the boss is used for treating the weld part of polar plate to second splint jack-up. The second splint correspond boss department and are provided with the breach, have first portion and the second portion that compresses tightly simultaneously in the breach both sides, first portion and the second portion that compresses tightly are used for respectively will treating welding portion both sides and press to first splint to make two polar plates treat that the quilt jack-up department of weld part can closely be in the same place, thereby avoid appearing rosin joint, the hourglass problem of welding when carrying out laser welding, and then guaranteed the cooling water cavity leakproofness of the bipolar plate of making.

Description

Bipolar plate welding jig and welding equipment

Technical Field

The utility model relates to the technical field of bipolar plate production equipment, in particular to a bipolar plate welding clamp and welding equipment.

Background

The bipolar plate is one of important components in a fuel cell, and is fabricated by welding a cathode plate and an anode plate.

The negative plate and the positive plate are metal plates which are manufactured by stamping and can not be deformed inevitably due to the existence of internal stress. Welding jig among the prior art is pressing from both sides two polar plates tight back, can't guarantee two absolute laminatings of polar plate, and there is the gap in the welding area department of two polar plates, so in welding process, the energy of laser generator input upper polar plate can not conduct to lower floor's polar plate, so appear rosin joint, leak welding phenomenon, and then just can not guarantee the leakproofness in the cooling water cavity of the bipolar plate of making yet.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bipolar plate welding clamp which can solve the technical problems that the cold joint and the leakage joint occur during the welding of the bipolar plate in the prior art, and the sealing performance of a cooling water cavity of the manufactured bipolar plate is poor.

The utility model also aims to provide welding equipment which can solve the technical problems that the phenomena of insufficient soldering and missing soldering occur during the welding of the bipolar plate in the prior art, and the sealing performance of a cooling water cavity of the manufactured bipolar plate is poor.

Embodiments of the utility model may be implemented as follows:

the embodiment of the utility model provides a bipolar plate welding clamp which is used for clamping a polar plate to be welded and comprises a first clamping plate and a second clamping plate which are oppositely arranged, wherein a boss is arranged on one side of the first clamping plate, which is close to the second clamping plate, and the boss is used for jacking a part to be welded of the polar plate to the second clamping plate; the second splint correspond boss department is provided with the breach, the breach is used for supplying a welding to right treat the welding part welds, just the second splint have and are located the first portion and the second portion that compresses tightly of breach both sides compress tightly, first portion that compresses tightly with the second portion that compresses tightly is used for respectively with treat that the welding part both sides press to first splint.

Optionally, the boss has a top surface for abutting against the to-be-welded portion, and the top surface is an upper end surface of the boss.

Optionally, the abutting-against surface is an arc surface, and the arc surface protrudes toward a direction close to the second clamping plate.

Optionally, the abutting surface is a plane.

Optionally, the width of the plane is d1, the width of the part to be welded is d2, and d1 is less than half of d 2.

Optionally, the first compressing portion and the second compressing portion are both protruding structures arranged at the edge of the notch.

Optionally, the bipolar plate welding jig further comprises a pressing member disposed on the second clamping plate, and the pressing member is configured to apply a pressing force directed to the first clamping plate to the first pressing portion and the second pressing portion.

Optionally, the pressing member includes a magnetic member.

Optionally, the bipolar plate welding jig further includes a positioning pin, the first clamping plate is provided with a first positioning hole, the second clamping plate is provided with a second positioning hole, and the positioning pin is simultaneously matched with the first positioning hole and the second positioning hole to position the first clamping plate and the second clamping plate.

The embodiment of the utility model also provides welding equipment. The welding equipment comprises a welding part and the bipolar plate welding clamp, wherein the welding head of the welding part is used for extending into the notch of the second clamping plate so as to weld the parts to be welded of the bipolar plate.

The bipolar plate welding fixture and the welding equipment provided by the embodiment of the utility model have the beneficial effects that:

the bipolar plate welding clamp provided by the embodiment of the utility model is used for clamping a polar plate to be welded and comprises a first clamping plate and a second clamping plate which are oppositely arranged, and the polar plate to be welded is clamped between the first clamping plate and the second clamping plate when in use. One side that first splint are close to the second splint is provided with the boss, and the boss is used for treating the weld part of polar plate to second splint jack-up. The second splint correspond boss department and are provided with the breach, first portion and the second portion that compresses tightly has simultaneously in the breach both sides, first portion and the second portion that compresses tightly are used for respectively will treating the welding part both sides and press to first splint, so treat that the welding part is warp by jack-up department to second splint department, treat that the welding part both sides is to first splint warp, thereby make two polar plates treat that the quilt jack-up department of welding part can closely laminate together, thereby avoid appearing the rosin joint when carrying out laser welding, the problem of leaking welding, and then guaranteed the cooling water cavity leakproofness of the bipolar plate of making.

Embodiments of the present invention also provide a welding apparatus that includes a bipolar plate welding fixture. Because this welding equipment includes foretell bipolar plate welding jig, consequently also have and can avoid appearing rosin joint, leak welding problem, the cooling water cavity of the bipolar plate of making has the advantage that the leakproofness is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an exploded view of a bipolar plate welding jig according to embodiment 1 of the present invention;

fig. 2 is a schematic cross-sectional view of a bipolar plate welding jig according to embodiment 1 of the present invention;

fig. 3 is a schematic cross-sectional view of a bipolar plate welding jig according to embodiment 2 of the present invention;

fig. 4 is a schematic cross-sectional view of a bipolar plate welding jig according to embodiment 3 of the present invention.

Icon: 100-bipolar plate welding jig; 110-a first splint; 111-boss; 112-against the top surface; 113-a first locating hole; 120-a second splint; 121-notch; 122-a first compression section; 123-a second pressing part; 124-second positioning hole; 130-a locating pin; 200-a weld; 21-pole plate; 22-third positioning hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, it should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Example 1

Fig. 1 is an exploded view of a bipolar plate welding fixture 100 provided in this embodiment, and fig. 2 is a cross-sectional view of the bipolar plate welding fixture 100 provided in this embodiment. Referring to fig. 1 and fig. 2, the present embodiment provides a bipolar plate welding fixture 100.

The bipolar plate welding jig 100 is used for clamping a plate 21 to be welded, and comprises a first clamping plate 110 and a second clamping plate 120 which are oppositely arranged, and the plate 21 to be welded is clamped between the first clamping plate 110 and the second clamping plate 120 in use. A boss 111 is disposed on one side of the first clamping plate 110 close to the second clamping plate 120, and the boss 111 is used for jacking the part to be welded of the pole plate 21 towards the second clamping plate 120. The second clamping plate 120 is provided with a notch 121 corresponding to the boss 111, and a first pressing portion 122 and a second pressing portion 123 are arranged on two sides of the notch 121, the first pressing portion 122 and the second pressing portion 123 are respectively used for pressing two sides of the to-be-welded portion to the first clamping plate 110, so that the to-be-welded portion is deformed towards the second clamping plate 120 by the jacking portion, two sides of the to-be-welded portion are deformed towards the first clamping plate 110, and the to-be-jacked portions of the to-be-welded portions of the two polar plates 21 can be tightly attached together, thereby avoiding the problems of insufficient welding and missing welding during laser welding, and further ensuring the sealing performance of a cooling water cavity of the manufactured bipolar plate 21.

The bipolar plate welding jig 100 provided in the present embodiment is further described below:

with reference to fig. 1 and fig. 2, in the present embodiment, the first clamping plate 110 and the second clamping plate 120 are both substantially flat plate-shaped, and the first clamping plate 110 and the second clamping plate 120 are disposed opposite to each other in the thickness direction, so that a clamping area for clamping the electrode plate 21 to be welded is formed between the first clamping plate 110 and the second clamping plate 120, during welding, the two electrode plates 21 are clamped together by the first clamping plate 110 and the second clamping plate 120, and then are welded into a whole by laser, so as to manufacture the bipolar plate 21.

The end face of the first clamping plate 110 close to one side of the second clamping plate 120 is provided with a boss 111, the boss 111 protrudes out of the end face of the first clamping plate 110, the boss 111 corresponds to the part to be welded of the pole plate 21, and therefore the part to be welded of the pole plate 21 is jacked up to the second clamping plate 120. Meanwhile, a notch 121 is formed in the position, corresponding to the boss 111, of the second clamping plate 120, the notch 121 is used for enabling the welding part 200 to weld the part to be welded, the second clamping plate 120 is provided with a first pressing portion 122 and a second pressing portion 123 which are located on two sides of the notch 121, the parts, located on two sides of the boss 111, of the part to be welded are pressed to the first clamping plate 110 through the first pressing portion 122 and the second pressing portion 123 respectively, so that the two pole plates 21 can be tightly attached to the boss 111 in a jacking position, the welding part 200 further extends into the space between the first clamping plate 110 and the second clamping plate 120 from the notch 121, and after the jacking positions of the two pole plates 21 are welded, the welding quality of the welding position can be guaranteed.

Further, the boss 111 may be regarded as a structure protruding in the thickness direction of the first clamping plate 110, and has a top surface 112 for abutting against the portion to be welded, where the top surface 112 is the upper end surface of the boss 111. Optionally, the abutting surface 112 is a cambered surface, and the cambered surface protrudes towards the direction close to the second clamping plate 120, so that at the topmost point of the abutting surface 112, the two pole plates 21 are tightly fitted.

In the present embodiment, the second clamping plate 120 of the bipolar plate welding jig 100 applies pressure to the plate 21 by its own weight, thereby pressing the first compression part 122 and the corresponding portion of the plate 21 at the second compression part 123 toward the first clamping plate 110. It is understood that in other embodiments, a pressing member (not shown) may be additionally provided on the second clamping plate 120, so that a pressing force directed to the first clamping plate 110 is applied to the first pressing portion 122 and the second pressing portion 123 by the pressing member, so that the first pressing portion 122 and the second pressing portion 123 better press the corresponding portion of the pole plate 21 to the first clamping plate, and the combination of the portion jacked up by the boss 111 is ensured to be tight, alternatively, the pressing member may be provided to include a magnetic attraction member, and the magnetic attraction force generated in this way may be used as the pressing force, or other manners, such as providing a clamping member to press the second clamping plate 120 to the first clamping plate 110, etc., may be adopted.

In this embodiment, the bipolar plate welding jig 100 further includes a positioning pin 130, the first clamping plate 110 is provided with a first positioning hole 113, the second clamping plate 120 is provided with a second positioning hole 124, and the positioning pin 130 is simultaneously matched with the first positioning hole 113 and the second positioning hole 124, so as to ensure accurate positioning of the first clamping plate 110 and the second clamping plate 120, and at this time, the notch 121 is disposed opposite to the boss 111. Meanwhile, the pole plate 21 can be correspondingly provided with the third positioning hole 22, and the joint positioning of the first clamping plate 110, the pole plate 21 and the second clamping plate 120 is realized through the matching of the positioning pin 130 with the first positioning hole 113, the second positioning hole 124 and the third positioning hole 22, so that the corresponding accuracy of the part to be welded of the pole plate 21 and the boss 111 is ensured.

The bipolar plate welding fixture 100 provided by the embodiment has at least the following advantages:

an embodiment of the present invention provides a bipolar plate welding jig 100, which can prevent the occurrence of a weld defect by providing a boss 111 on a first clamping plate 110, a notch 121 is arranged on the second clamping plate 120 corresponding to the boss 111, so that the part to be welded of the pole plate 21 is jacked up to the notch 121 through the boss 111, the portions to be welded on both sides of the boss 111 are pressed toward the first clamping plate 110 by the first pressing portion 122 and the second pressing portion 123 of the second clamping plate 120, thus, the parts to be welded of the two pole plates 21 at the boss 111 can be tightly attached together, and then the welding part 200 can be inserted between the first clamping plate 110 and the second clamping plate 120 through the notch 121, thereby welding the portions to be welded at the bosses 111, to weld the two electrode plates 21 as a single body to manufacture the bipolar plate 21, meanwhile, the phenomena of insufficient soldering and missing soldering can be avoided, and the cooling water cavity of the manufactured bipolar plate 21 has good sealing property.

The present embodiment also provides a welding arrangement comprising the bipolar plate welding jig 100 described above, and the welding apparatus further comprises a welding member 200, such that two of the polar plates 21 clamped by the bipolar plate welding jig 100 are welded by the welding member 200 to obtain the bipolar plate 21. Specifically, the weldment 200 is a laser welder.

Example 2

Fig. 3 is a schematic cross-sectional view of a bipolar plate welding fixture 100 provided in this embodiment. Referring to fig. 1 to fig. 3, a bipolar plate welding fixture 100 is also provided in the present embodiment, which is substantially the same as the bipolar plate welding fixture 100 provided in embodiment 1, and the same points are not repeated herein, except that the first pressing portion 122 and the second pressing portion 123 of the bipolar plate welding fixture 100 provided in the present embodiment have different structures.

Specifically, in the bipolar plate welding jig 100 provided in example 1, the second clamping plate 120 is a flat plate, and the first pressing portion 122 and the second pressing portion 123 thereof are flat surfaces located on both sides of the notch 121. In this embodiment, in order to ensure reliable pressing down of the portion to be welded, for the polar plate 21 with a wider portion to be welded, the first pressing portion 122 and the second pressing portion 123 are both protruding structures disposed at the edge of the notch 121, so that the protrusions can be pressed at the welding area, and a tight fitting effect at the portion to be welded is ensured.

Example 3

Fig. 4 is a schematic cross-sectional view of a bipolar plate welding fixture 100 provided in this embodiment. Referring to fig. 1 to 4, the present embodiment also provides a bipolar plate welding fixture 100, which is substantially the same as the bipolar plate welding fixture 100 provided in embodiment 1, and the same points are not repeated herein, except that the structure of the abutting surface 112 of the boss 111 is different.

Specifically, in the bipolar plate welding fixture 100 provided in embodiment 1, the abutting surface 112 of the boss 111 is an arc surface, so that effective and reliable attachment of the portion to be welded can be ensured. In this embodiment, the abutting surface 112 of the boss 111 is configured as a plane, further, in order to ensure that after the plane is jacked up for the to-be-welded portion, the to-be-welded portions of the two pole plates 21 can be tightly adhered together, and the width of the abutting surface 112 is configured as a smaller width, optionally, in this embodiment, the width of the abutting surface 112 is configured as d1, the width of the to-be-welded portion is d2, and the smaller width of the abutting surface 112 is that the width of the abutting surface 112 is half of the d 2.

Specifically, the plate 21 has punched grooves for forming cooling water cavities thereon, and the portion to be welded is a portion between two adjacent punched grooves, and accordingly, the width of the portion to be welded is a distance between the two punched grooves.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A bipolar plate welding clamp is used for clamping a polar plate (21) to be welded, and is characterized in that the bipolar plate welding clamp (100) comprises a first clamping plate (110) and a second clamping plate (120) which are arranged oppositely, a boss (111) is arranged on one side, close to the second clamping plate (120), of the first clamping plate (110), and the boss (111) is used for jacking a part to be welded of the polar plate (21) to the second clamping plate (120); a notch (121) is formed in the position, corresponding to the boss (111), of the second clamping plate (120), the notch (121) is used for welding a welding part (200) to the part to be welded, the second clamping plate (120) is provided with a first pressing part (122) and a second pressing part (123) which are located on two sides of the notch (121), and the first pressing part (122) and the second pressing part (123) are respectively used for pressing two sides of the part to be welded to the first clamping plate (110).

2. The bipolar plate welding jig according to claim 1, wherein the boss (111) has a butting face (112) for butting against the portion to be welded, and the butting face (112) is an upper end face of the boss (111).

3. The bipolar plate welding fixture of claim 2, wherein the abutting surface (112) is an arc surface, and the arc surface protrudes in a direction approaching the second clamping plate (120).

4. A bipolar plate welding fixture as claimed in claim 2, wherein the butting face (112) is planar.

5. A bipolar plate weld jig as claimed in claim 4, wherein the plane has a width d1, the width of the portion to be welded is d2, and d1 is less than half of d 2.

6. The bipolar plate welding fixture of claim 1, wherein the first compression part (122) and the second compression part (123) are each a raised structure disposed at the edge of the notch (121).

7. A bipolar plate welding jig according to claim 1, wherein the bipolar plate welding jig (100) further comprises a pressing member provided to the second clamping plate (120) for applying a pressing force directed toward the first clamping plate (110) to the first and second pressed portions (122, 123).

8. A bipolar plate weld fixture as claimed in claim 7, wherein the compression member includes a magnetically attractive member.

9. The bipolar plate welding jig according to any one of claims 1 to 8, wherein the bipolar plate welding jig (100) further comprises a positioning pin (130), the first clamping plate (110) is provided with a first positioning hole (113), the second clamping plate (120) is provided with a second positioning hole (124), and the positioning pin (130) is simultaneously engaged with the first positioning hole (113) and the second positioning hole (124) to position the first clamping plate (110) and the second clamping plate (120).

10. A welding apparatus, characterized in that it comprises a weld part (200) and a bipolar plate welding fixture (100) according to any one of claims 1 to 9, the weld part of the weld part (200) being intended to protrude from the gap (121) of the second clamping plate (120) for welding the parts to be welded of the bipolar plate (21).