A flexible board welding positioning fixture

Abstract

This application discloses a positioning fixture for flexible busbar welding, comprising a base plate, a first positioning module, a second positioning module, and a third positioning module. The first and second positioning modules, through sliding positioning blocks and grooves, provide adjustable positioning of the flexible busbar from the left and rear sides respectively, offering strong versatility. The third positioning module is located on the front side of the base plate and includes a third positioning groove formed in the base plate, a third positioning plate that can be placed into the groove, and clamping components for pressing the flexible busbar onto the positioning plate. By first pressing the flexible busbar onto the positioning plate and then placing it entirely into the positioning groove, precise positioning of the front side of the flexible busbar is achieved. This invention solves the problems of unstable positioning and poor adaptability in flexible busbar welding through multi-directional collaborative positioning, significantly improving welding accuracy and yield.

Description

Technical Field

[0001] This application relates to the field of electronic component welding fixture technology, and in particular to a flexible busbar welding positioning fixture. Background Technology

[0002] Flexible copper busbars, also known as flexible copper busbars, are highly conductive connectors made of multiple layers of thin copper sheets. They are flexible and bendable, and are widely used in high-current operating scenarios such as new energy vehicles, power storage systems, frequency converters, and rail transit to connect high-power devices such as battery modules, drive modules, and capacitors.

[0003] In the termination process of flexible copper busbars, it is often necessary to solder them to terminals, copper substrates, or the pins of power electronic components (such as laser soldering or brazing) to form a robust, low-resistance connection. Currently, this soldering process mainly faces the following challenges:

[0004] (1) The soft copper busbar itself has a certain weight and rigidity, and it is easy to shift or spring up during placement. When it is fixed manually using general-purpose clamps (such as flat-nose pliers or simple clamping blocks), it is difficult to ensure that it fits tightly with the welding surface, which can easily lead to inaccurate welding position, increased connection resistance, and even local overheating due to poor contact when a large current passes through, posing a serious safety hazard.

[0005] (2) The soft copper busbars used in different models and specifications of electrical products vary significantly in width, length and welding angle. Existing positioning fixtures are mostly rigid designs, dedicated to a single product, and lack effective adjustment mechanisms. When the product is changed, new fixtures must be customized, resulting in high production costs and long preparation cycles, which cannot meet the needs of flexible production.

[0006] (3) Welding of soft copper busbars usually requires a high heat input. Existing fixtures are mostly solid metal structures, which act as huge heat sinks during welding. A large amount of heat is absorbed by the fixture, which may cause the solder to cool too quickly and form a cold weld, affecting the welding quality. On the other hand, the high temperature may also be conducted through the fixture to the non-welded areas of the soft copper busbar, causing aging or damage to its insulation layer (if any). In addition, welding spatter and slag are easy to accumulate on the surface of the fixture, which is difficult to clean and affects the subsequent positioning accuracy. Utility Model Content

[0007] The purpose of this application is to provide a positioning fixture that can provide stable, accurate and adjustable positioning for soft copper busbars, while effectively improving the welding thermal environment and ensuring welding quality.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] A flexible busbar welding positioning fixture includes a base plate; a first positioning module disposed on the base plate for positioning the left side of the flexible busbar; a second positioning module disposed on the base plate for positioning the rear side of the flexible busbar; and a third positioning module disposed on the front side of the base plate. The third positioning module includes a third positioning groove formed in the base plate, a third positioning plate that can be placed in the third positioning groove, and a clamping member for pressing the flexible busbar onto the third positioning plate. The base plate has a clearance portion at the bottom corresponding to the third positioning groove.

[0010] Furthermore, the first positioning module includes a first positioning block, a first sliding groove, and a first locking member. The first sliding groove is opened along the length direction of the base plate, and the first positioning block is slidably disposed in the first sliding groove and locked in position by the first locking member.

[0011] Furthermore, the second positioning module includes a second positioning block, a second sliding groove, and a second locking member. The second sliding groove is opened along the width direction of the base plate, and the second positioning block is slidably disposed in the second sliding groove and locked in position by the second locking member.

[0012] Furthermore, the second positioning module also includes an auxiliary positioning block, which is arranged side by side with the second positioning block and is slidably locked in the second groove.

[0013] Furthermore, a scale is provided on the base plate.

[0014] Furthermore, the base plate is made of aluminum.

[0015] The beneficial effects of this application are as follows:

[0016] (1) This application establishes a stable positioning reference by setting up a first positioning module, a second positioning module, and a third positioning module to perform three-dimensional positioning of the soft copper busbar from three directions: left, rear, and front. In particular, the third positioning module firmly presses the soft copper busbar onto the third positioning plate with clamping components and then places it into the third positioning groove as a whole, effectively overcoming the tendency of the soft copper busbar to spring and shift due to its own rigidity, and ensuring a tight fit between the soft copper busbar and the welding surface. This multi-degree-of-freedom limiting structure fundamentally avoids problems such as inaccurate welding and misaligned welding caused by inaccurate positioning, significantly improving the electrical connection reliability and mechanical strength of the welded joint, and meeting the stringent requirements for connection quality in high-current application scenarios.

[0017] (2) Both the first positioning module and the second positioning module of this application adopt the adjustment of sliding groove and slider, so that the position of the first positioning block and the second positioning block can be flexibly and accurately adjusted according to the size of different specifications of soft copper busbars. This modular and adjustable setting allows a set of fixtures to adapt to products with different lengths, widths and welding positions, which greatly improves the versatility of the fixtures. When the product is changed, there is no need to re-make the mold and manufacture the entire set of fixtures. Only the positioning blocks need to be simply adjusted, which significantly reduces the production cost and shortens the production preparation cycle. It is particularly suitable for flexible production mode with small batches and multiple varieties. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a flexible busbar welding positioning fixture clamping a flexible busbar according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of a flexible busbar welding positioning fixture provided in an embodiment of this application when the flexible busbar is not clamped;

[0020] Figure 3 This is a schematic diagram of the bottom structure of a flexible busbar welding positioning fixture that holds the flexible busbar in one embodiment of this application;

[0021] Figure 4 A top view of a flexible busbar welding positioning fixture clamping a flexible busbar according to an embodiment of this application;

[0022] Explanation of reference numerals in the attached figures:

[0023] Q, Soft stack;

[0024] 1. Base plate; 2. First positioning module; 3. Second positioning module; 4. Third positioning module; 5. Scale;

[0025] 41. Third positioning groove; 42. Third positioning plate; 43. Clamping component; 44. Clearance part;

[0026] 21. First positioning block; 22. First slide groove; 23. First locking element;

[0027] 31. Second positioning block; 32. Second slide groove; 33. Second locking element; 34. Auxiliary positioning block; Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0030] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0031] like Figures 1 to 4 As shown, a flexible busbar Q welding positioning fixture includes a base plate 1; a first positioning module 2, disposed on the base plate 1, for positioning the left side of the flexible busbar Q; a second positioning module 3, disposed on the base plate 1, for positioning the rear side of the flexible busbar Q; and a third positioning module 4, disposed on the front side of the base plate 1. The third positioning module 4 includes a third positioning groove 41 formed on the base plate 1, a third positioning plate 42 that can be placed in the third positioning groove 41, and a clamping member 43 for pressing the flexible busbar Q onto the third positioning plate 42. The bottom of the base plate 1 corresponding to the third positioning groove 41 is provided with a clearance portion 44, which is provided to facilitate the placement and removal of the third positioning plate 42.

[0032] In one embodiment, the first positioning module 2 includes a first positioning block 21, a first sliding groove 22, and a first locking member 23. The first sliding groove 22 is formed along the length direction of the base plate 1. The first positioning block 21 is slidably disposed in the first sliding groove 22 and locked in position by the first locking member 23. The first positioning module 2 realizes flexible, precise positioning and rapid adaptation of the fixture for soft racks Q of different sizes in the length direction.

[0033] In one embodiment, the second positioning module 3 includes a second positioning block 31, a second slide groove 32, and a second locking member 33. The second slide groove 32 is formed along the width direction of the base plate 1. The second positioning block 31 is slidably disposed in the second slide groove 32 and locked in position by the second locking member 33. The second positioning module 3 realizes reliable positioning of the soft strip Q by the fixture in the width direction, and its position is adjustable to adapt to different welding position requirements.

[0034] In one embodiment, the second positioning module 3 further includes an auxiliary positioning block 34, which is arranged side by side with the second positioning block 31 and is slidably locked in the second groove 32. By providing additional support points, warping or displacement of the long soft busbar Q during positioning and welding is effectively prevented, thus enhancing positioning stability.

[0035] In one embodiment, a scale 5 is provided on the base plate 1. This provides an intuitive visual reference for the rapid and precise adjustment of the positioning blocks, significantly improving the efficiency and accuracy of changeover adjustments.

[0036] In one embodiment, the base plate 1 is made of aluminum. While ensuring the overall structural rigidity and durability of the fixture, it also has the combined advantages of being lightweight, corrosion-resistant, and easy to process.

[0037] The working principle of this application is as follows:

[0038] First, the fixture is pre-adjusted according to the specific dimensions (length and width) of the soft copper busbar to be welded.

[0039] Adjust the first positioning module 2, loosen the first locking member 23, and slide the first positioning block 21 along the length of the base plate 1 to the desired position. At this time, the inner (right) side of the first positioning block 21 determines the positioning reference on the left side of the soft copper busbar. After adjustment, tighten the first locking member 23.

[0040] Adjust the second positioning module 3. Similarly, loosen the second locking member 33 and slide the second positioning block 31 (and the auxiliary positioning block 34 as needed) along the width direction of the base plate 1 to the desired position. The front sides of these positioning blocks together form the positioning reference for the rear side of the soft copper busbar. After adjustment, tighten the corresponding locking members.

[0041] During this stage, the scale 5 on the base plate 1 provides an intuitive dimensional reference for quick and accurate adjustments, greatly improving the efficiency of changeover adjustments.

[0042] Then, the third positioning plate 42 is removed from the third positioning slot 41 and used as an independent operating platform.

[0043] Place the soft copper arrangement on the upper surface of the third positioning plate 42.

[0044] The clamping element 43 (e.g., a clip) is used to firmly press the front end of the soft copper busbar onto the third positioning plate 42. This step ensures that the soft copper busbar will not shift relative to the third positioning plate 42 during subsequent operations and welding.

[0045] Then, the "third positioning plate 42 and soft copper busbar" assembly, which has already been pressed into the soft copper busbar, is precisely embedded as a whole into the third positioning groove 41 of the base plate 1. At this point, the front position of the soft copper busbar is completely determined by the precise fit between the third positioning plate 42 and the third positioning groove 41.

[0046] Finally, with the "front side" fixed, push the left side of the soft copper busbar towards and tightly against the pre-adjusted first positioning block 21. At the same time, push the rear side of the soft copper busbar towards and tightly against the pre-adjusted second positioning block 31 (and auxiliary positioning block 34). At this point, the soft copper busbar is fully constrained in the horizontal plane through both left and rear directions, and its final welding position is precisely locked.

[0047] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A flexible strip welding positioning fixture, characterized in that: include Base plate; The first positioning module is set on the base plate and is used to position the left side of the soft board; The second positioning module is installed on the base plate and is used to position the rear side of the flexible board. The third positioning module is disposed on the front side of the base plate; the third positioning module includes a third positioning groove formed on the base plate, a third positioning plate that can be placed in the third positioning groove, and a clamping member for pressing the soft strip onto the third positioning plate; the bottom of the base plate is provided with a clearance portion corresponding to the bottom of the third positioning groove.

2. The flexible busbar welding positioning fixture according to claim 1, characterized in that: The first positioning module includes a first positioning block, a first sliding groove, and a first locking member. The first sliding groove is opened along the length direction of the base plate. The first positioning block is slidably disposed in the first sliding groove and locked in position by the first locking member.

3. The flexible busbar welding positioning fixture according to claim 1, characterized in that: The second positioning module includes a second positioning block, a second sliding groove, and a second locking member. The second sliding groove is opened along the width direction of the base plate, and the second positioning block is slidably disposed in the second sliding groove and locked in position by the second locking member.

4. The flexible busbar welding positioning fixture according to claim 3, characterized in that: The second positioning module further includes an auxiliary positioning block, which is arranged side by side with the second positioning block and is slidably locked in the second groove.

5. A flexible busbar welding positioning fixture according to claim 1, characterized in that: A ruler is provided on the base plate.

6. A flexible busbar welding positioning fixture according to claim 1, characterized in that: The base plate is made of aluminum.

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