Laminated busbar hot-pressing die

Abstract

The utility model discloses a laminated busbar hot-pressing die in the field of laminated busbar production, which comprises an upper die and a lower die, the upper die and the lower die are oppositely arranged, a first limiting block group is arranged on the upper die, and a second limiting block group is arranged on the lower die. The plurality of limiting blocks in the first limiting block group and the plurality of limiting blocks in the second limiting block group are arranged in a step shape; and when the upper die and the lower die are closed, one side of the first limiting block group and one side of the second limiting block group abut against the laminated busbar. According to the laminated busbar hot-pressing die, the problem that the position of a laminated busbar is easy to deviate or deform due to the fact that the limiting precision of an existing laminated busbar hot-pressing die is insufficient in the die assembly process is solved, and the limiting blocks arranged in the step shape can provide more contact points and supporting surfaces; therefore, the position of the laminated busbar in the die assembly process can be more accurately controlled, deviation caused by uneven stress is reduced, excessive die assembly of the upper die and the lower die can be prevented, and damage to the laminated busbar is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of laminated busbar production, in particular to a laminated busbar hot pressing die. Background Art

[0002] With the rapid development of power electronics technology, particularly in high-voltage, high-power converters, the performance requirements for busbars (conductor bars) are increasing. Laminated busbars, with their advantages of low distributed inductance, high electrical safety, small footprint, and low cost, are becoming the mainstream choice in the market. Demand for laminated busbars is particularly increasing in wind power, photovoltaics, and power transmission.

[0003] When manufacturing existing laminated busbars, a single copper busbar is typically hot-pressed using hot-pressing equipment and dies to heat-press multiple layers of copper busbars together to create a single laminated busbar. However, during the clamping process, existing hot-pressing dies for laminated busbars suffer from insufficient positioning accuracy. For example, the shape, size, and arrangement of the positioning structures cannot meet the requirements for positioning the laminated busbars. This can easily lead to positional deviation or deformation of the laminated busbar, compromising product quality and performance.

[0004] The above defects need to be solved urgently. Utility Model Content

[0005] In order to solve the problem that the existing laminated busbar hot pressing mold has insufficient limiting accuracy during the mold closing process, which easily causes the position of the laminated busbar to shift or deform, affecting the quality and performance of the product, the utility model provides a laminated busbar hot pressing mold.

[0006] The technical solution of this utility model is as follows:

[0007] A laminated busbar hot pressing die comprises an upper die and a lower die, wherein the upper die is arranged opposite to the lower die, a first limit block group is provided on the upper die, and a second limit block group is provided on the lower die, wherein the limit blocks in the first limit block group and the limit blocks in the second limit block group are arranged in a stepped manner;

[0008] When the upper mold and the lower mold are closed, one side of the first limit block group and one side of the second limit block group are both in contact with the laminated busbar.

[0009] According to the above-mentioned solution of the present invention, the first limit block group is arranged on the bottom side of the upper mold, and the second limit block group is arranged on the top side of the lower mold.

[0010] According to the above solution of the present invention, the first limit block group and the second limit block group are arranged diagonally.

[0011] According to the above-mentioned solution of the present invention, the first limit block group includes a first outer limit portion and a first inner limit portion arranged side by side, and the second limit block group includes a second outer limit portion and a second inner limit portion arranged side by side;

[0012] When the upper mold and the lower mold are closed, one end of the laminated busbar abuts against the first outer limiting portion and the first inner limiting portion, and the other end of the laminated busbar abuts against the second outer limiting portion and the second inner limiting portion.

[0013] According to the above solution of the present invention, the thickness of the first outer limiting portion is greater than the thickness of the first inner limiting portion, and the thickness of the second outer limiting portion is greater than the thickness of the second inner limiting portion.

[0014] According to the above-mentioned solution of the utility model, the laminated busbar includes a first copper bar, a second copper bar, and a third copper bar stacked in sequence, one end of the first copper bar is arranged on the top of the second outer limiting portion, one end of the second copper bar is arranged on the top of the second inner limiting portion, and the end of the second copper bar is abutted against the side wall of the second outer limiting portion, the third copper bar is arranged on the lower mold, and one end of the third copper bar is abutted against the side wall of the second inner limiting portion.

[0015] According to the utility model of the above solution, the lower mold is further provided with a plurality of positioning posts corresponding to the first copper bar, the second copper bar, and the third copper bar. The plurality of positioning posts are arranged at intervals, and the plurality of positioning posts are respectively in contact with the first copper bar, the second copper bar, and the third copper bar, so that the first copper bar, the second copper bar, and the third copper bar are staggered and stacked.

[0016] According to the above-mentioned solution of the utility model, the first copper bar, the second copper bar, and the third copper bar all include a straight section and a plurality of bent sections, and the plurality of bent sections are arranged at intervals on the side walls of the straight section. The plurality of positioning posts are respectively in contact with the bent section at the end of the first copper bar, the bent section at the end of the second copper bar, and the bent section at the end of the third copper bar.

[0017] According to the above solution of the present invention, the positioning posts are located below the second limiting block group, and the distance between two adjacent positioning posts is equal to the length of the second inner limiting portion.

[0018] According to the above solution of the present invention, the length direction of the positioning column is perpendicular to the length direction of the lower mold.

[0019] The utility model according to the above solution has the following beneficial effects:

[0020] In the above-mentioned laminated busbar hot pressing mold, several limit blocks in the first limit block group and several limit blocks in the second limit block group are arranged in a stepped manner. The limit blocks arranged in a stepped manner can provide more contact points and support surfaces, thereby being able to more accurately control the position of the laminated busbar during the mold closing process, helping to reduce the offset caused by uneven force. At the same time, the first limit block group and the second limit block group cooperate with each other to limit the height direction, which can limit the distance between the upper mold and the lower mold during mold closing, prevent the upper mold and the lower mold from being over-pressed, and avoid damage to the laminated busbar. In addition, the limit blocks arranged in a stepped manner can adapt to the staggered stacked laminated busbars, increase their contact area with the laminated busbars, thereby enhancing the limiting effect and helping to prevent local deformation of the laminated busbar during the mold closing process. In addition, during the mold closing process of the upper mold and the lower mold, the upper mold and the lower mold move synchronously, ensuring that the first limit block group and the second limit block group can act on the laminated busbar simultaneously and evenly, further improving the limiting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 for Figure 1 Enlarged view of part A;

[0023] Figure 3 for Figure 1 Enlarged view of part B;

[0024] Figure 4 It is a cross-sectional view of the utility model;

[0025] Figure 5 for Figure 4 Enlarged view of part C;

[0026] Figure 6 for Figure 4 Enlarged view of part D in the middle;

[0027] Figure 7 This is a disassembled diagram of the utility model;

[0028] Figure 8 Schematic diagram of the structure of the laminated busbar;

[0029] Figure 9 This is a disassembled diagram of the laminated busbar.

[0030] In the figure, 1. upper mold; 11. first limit block group; 111. first outer limit part; 112. first inner limit part; 2. lower mold; 21. second limit block group; 211. second outer limit part; 212. second inner limit part; 3. laminated busbar; 31. first copper busbar; 32. second copper busbar; 33. third copper busbar; 34. straight section; 35. bent section; 36. PET hot pressing film; 4. positioning column. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1 、 Figure 2 As shown, the utility model provides a laminated busbar hot pressing mold, including an upper mold 1 and a lower mold 2. The upper mold 1 and the lower mold 2 are arranged opposite to each other. The upper mold 1 is provided with a first limit block group 11, and the lower mold 2 is provided with a second limit block group 21. The limit blocks in the first limit block group 11 and the limit blocks in the second limit block group 21 are arranged in a stepped manner. The limit blocks arranged in a stepped manner can provide more contact points and support surfaces, thereby being able to more accurately control the position of the laminated busbar 3 during the mold closing process, helping to reduce the offset caused by uneven force. At the same time, the limit blocks arranged in a stepped manner can adapt to the staggered stacked laminated busbars 3, increase their contact area with the laminated busbar 3, thereby enhancing the limiting effect and preventing the laminated busbar 3 from local deformation during the mold closing process. When the upper mold 1 and the lower mold 2 are closed, the upper mold 1 and the lower mold 2 move synchronously, and one side of the first limit block group 11 and one side of the second limit block group 21 are both in contact with the laminated busbar 3, ensuring that the first limit block group 11 and the second limit block group 21 can act on the laminated busbar 3 simultaneously and evenly, further improving the limit accuracy.

[0033] like Figure 1 As shown, in this embodiment, the upper mold 1 and lower mold 2 are each designed as two sets. The two sets of upper molds 1 and the two sets of lower molds 2 operate simultaneously, achieving dual-station operation and improving production efficiency. Of course, in actual design, the number of sets of upper molds 1 and lower molds 2 can be designed according to actual needs. In addition, auxiliary blocks are installed on one side of the upper mold 1 and lower mold 2 to prevent deformation of the upper mold 1 and lower mold 2, thereby extending the service life of the utility model.

[0034] like Figures 3 to 5As shown, in this embodiment, the first limit block group 11 and the second limit block group 21 are arranged on the pressing surface of the upper mold 1 and the lower mold 2. The first limit block group 11 and the second limit block group 21 cooperate with each other to limit the height direction, and can limit the distance between the upper mold 1 and the lower mold 2 when the mold is closed, prevent the upper mold 1 and the lower mold 2 from being pressed too much, and avoid damage to the laminated busbar 3. In addition, the first limit block group 11 is arranged on the bottom side of the upper mold 1, and the second limit block group 21 is arranged on the top side of the lower mold 2. Specifically, the first limit block group 11 and the second limit block group 21 are arranged diagonally. The diagonal layout not only enhances the stability of the layer busbar mold during the mold closing process, but also makes the limiting effect of the first limit block group 11 and the second limit block group 21 more balanced and effective. When the upper mold 1 and the lower mold 2 are closed, the first limit block group 11 abuts against the top side of the laminated busbar 3, and the second limit block group 21 abuts against the bottom side of the laminated busbar 3, thereby limiting the bottom busbar between the upper mold 1 and the lower mold 2, effectively reducing the displacement or deformation of the laminated busbar 3 that may occur under high temperature and high pressure environment, ensuring the accuracy and consistency of the processing process, and at the same time simplifying the structure of the mold, improving production efficiency and reducing maintenance costs.

[0035] like Figures 3 to 5 As shown, in this embodiment, the first limit block group 11 includes a first outer limit portion 111 and a first inner limit portion 112 arranged side by side, and the second limit block group 21 includes a second outer limit portion 211 and a second inner limit portion 212 arranged side by side. When the upper mold 1 and the lower mold 2 are closed, one end of the laminated busbar 3 abuts the first outer limit portion 111 and the first inner limit portion 112, and the other end of the laminated busbar 3 abuts the second outer limit portion 211 and the second inner limit portion 212. This not only greatly enhances the stability of the laminated busbar 3 during processing, but also effectively prevents it from twisting or deflecting in high-temperature and high-pressure environments. In addition, by adjusting the position and size of the limit components, the positioning accuracy of the laminated busbar 3 in the mold can be further ensured, laying a solid foundation for subsequent processing.

[0036] like Figures 3 to 5 As shown, in this embodiment, the thickness of the first outer limiting portion 111 is greater than the thickness of the first inner limiting portion 112, and the thickness of the second outer limiting portion 211 is greater than the thickness of the second inner limiting portion 212. Through the thickness difference between the first outer limiting portion 111 and the first inner limiting portion 112, and the thickness difference between the second outer limiting portion 211 and the second inner limiting portion 212, not only the staggered stacking of the laminated busbars 3 is achieved in the horizontal direction, but also the spacing between the upper mold 1 and the lower mold 2 is limited when the two are closed, providing a stable support structure for the laminated busbar 3, and preventing the busbar from being deformed or damaged due to excessive mold pressure.

[0037] like Figures 3 to 9As shown, in this embodiment, the laminated busbar 3 includes a first copper bar 31, a second copper bar 32, and a third copper bar 33 stacked in sequence. When the upper mold 1 and the lower mold 2 are closed, one end of the first copper bar 31 is set at the top of the second outer limit portion, one end of the second copper bar 32 is set at the top of the second inner limit portion, and the end of the second copper bar 32 abuts the side wall of the second outer limit portion. The third copper bar 33 is set on the lower mold 2, and one end of the third copper bar 33 abuts the side wall of the second inner limit portion. At the same time, the other end of the first copper bar 31 abuts the side wall of the first inner limit portion, the other end of the second copper bar 32 is set at the bottom of the first inner limit portion, and the other end of the second copper bar 32 abuts the first outer limit portion, and the other end of the third copper bar 33 is set at the bottom of the first outer limit portion, thereby performing hot pressing on the laminated busbar 3, thereby bringing the first copper bar 31, the second copper bar 32, and the third copper bar 33 together.

[0038] like Figures 1 to 3 As shown, in this embodiment, the lower mold 2 is further provided with a plurality of positioning posts 4 corresponding to the first copper bar 31, the second copper bar 32, and the third copper bar 33. The three positioning posts 4 are arranged at intervals, and the three positioning posts 4 are respectively in contact with the first copper bar 31, the second copper bar 32, and the third copper bar 33, thereby realizing the horizontal positioning of the first copper bar 31, the second copper bar 32, and the third copper bar 33, so that the first copper bar 31, the second copper bar 32, and the third copper bar 33 are staggered and stacked. Specifically, the first copper busbar 31, the second copper busbar 32, and the third copper busbar 33 each include a straight section 34 and a plurality of bent sections 35. The bent sections 35 are spaced apart on the sidewalls of the straight section 34. The ends of the first copper busbar 31, the second copper busbar 32, and the third copper busbar 33 are each provided with bent sections 35. When the upper mold 1 and the lower mold 2 are closed, the bent sections 35 are located outside the pressing area between the upper mold 1 and the lower mold 2. The plurality of positioning posts 4 respectively abut the bent sections 35 at the ends of the first copper busbar 31, the second copper busbar 32, and the third copper busbar 33. When the laminated busbar 3 is placed on the lower mold 2, the positioning posts 4 can quickly and accurately contact the corresponding copper busbars, allowing the first copper busbar 31, the second copper busbar 32, and the third copper busbar 33 to be quickly placed on the lower mold 2, thereby improving production efficiency. At the same time, the position of the copper busbar is fixed by physical abutment to prevent it from shifting or dislocating during subsequent processing.

[0039] like Figures 1 to 3As shown, in this embodiment, the positioning posts 4 are located below the second limit block group 21. The distance between two adjacent positioning posts 4 is equal to the length of the second inner limit portion, and the distance between two adjacent positioning posts 4 is equal to the length of the first inner limit portion. The positioning posts 4 cooperate with the first inner limit portion and the second inner limit portion to not only ensure the accurate alignment and staggered stacking of the layers of the laminated busbar 3, but also reduce production errors and waste caused by position deviations, achieve precise positioning of the laminated busbar 3, and improve production efficiency. In addition, the length direction of the positioning posts 4 is perpendicular to the length direction of the lower mold 2, so that the positioning posts 4 can directly act on the side of the laminated busbar 3, achieving more accurate horizontal positioning, helping to reduce production errors caused by positioning deviations and improve the overall quality of the product.

[0040] like Figures 7 to 9 As shown, when the present invention is working, the third copper bar 33 is first placed on the lower mold 2, and the curved section of the third copper bar 33 at the end is abutted against the positioning post 4 close to the inner side of the lower mold 2, then the PET hot pressing film 36 is placed on the top of the third copper bar 33, and then the second copper bar 32 is stacked on the top of the third copper bar 33, and the curved section of the second copper bar 32 at the end is abutted against the second positioning post 4 close to the inner side of the lower mold 2, and then the PET hot pressing film 36 is placed on the top of the second copper bar 32, and at the same time, the first copper bar 31 is placed on the top of the second copper bar 32, and the curved section of the first copper bar 31 at the end is abutted against the positioning post 4 close to the outer side of the lower mold 2, finally, the upper mold 1 and the lower mold 2 are closed, and the PET hot pressing film 36 is used to molecularly dissolve and bond the first copper bar 31, the second copper bar 32, and the third copper bar 33 through high-temperature hot pressing to achieve integration into a laminated busbar 3, thereby improving assembly efficiency and reducing installation cost. It should be noted that the PET hot pressing film 36 is arranged in the area where the first copper bar 31 and the second copper bar 32 are stacked and in the area where the second copper bar 32 and the third copper bar 33 are stacked, so as to improve the connection stability among the first copper bar 31, the second copper bar 32 and the third copper bar 33.

[0041] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

[0042] The above is an exemplary description of the present utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the present utility model patent is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present utility model patent, or the concept and technical solution of the present utility model patent are directly applied to other occasions without improvement, they are all within the scope of protection of the present utility model.

Claims

1. A laminated busbar hot pressing die, characterized in that: The mold comprises an upper mold and a lower mold, wherein the upper mold is arranged opposite to the lower mold, a first limit block group is provided on the upper mold, and a second limit block group is provided on the lower mold, wherein the limit blocks in the first limit block group and the limit blocks in the second limit block group are arranged in a stepped shape; When the upper mold and the lower mold are closed, one side of the first limit block group and one side of the second limit block group are both in contact with the laminated busbar.

2. The laminated busbar hot pressing mold according to claim 1, characterized in that: The first limit block group is arranged on a bottom side of the upper mold, and the second limit block group is arranged on a top side of the lower mold.

3. The laminated busbar hot pressing mold according to claim 2, characterized in that: The first limit block group and the second limit block group are arranged diagonally.

4. The laminated busbar hot pressing mold according to claim 1, characterized in that: The first limit block group includes a first outer limit portion and a first inner limit portion arranged side by side, and the second limit block group includes a second outer limit portion and a second inner limit portion arranged side by side; When the upper mold and the lower mold are closed, one end of the laminated busbar abuts against the first outer limiting portion and the first inner limiting portion, and the other end of the laminated busbar abuts against the second outer limiting portion and the second inner limiting portion.

5. The laminated busbar hot pressing die according to claim 4, characterized in that: The thickness of the first outer limiting portion is greater than the thickness of the first inner limiting portion, and the thickness of the second outer limiting portion is greater than the thickness of the second inner limiting portion.

6. The laminated busbar hot pressing die according to claim 5, characterized in that: The laminated busbar includes a first copper bar, a second copper bar, and a third copper bar stacked in sequence, one end of the first copper bar is arranged on the top of the second outer limiting portion, one end of the second copper bar is arranged on the top of the second inner limiting portion, and the end of the second copper bar abuts the side wall of the second outer limiting portion, and the third copper bar is arranged on the lower mold, and one end of the third copper bar abuts the side wall of the second inner limiting portion.

7. The laminated busbar hot pressing die according to claim 6, characterized in that: The lower mold is further provided with a plurality of positioning posts corresponding to the first copper bar, the second copper bar, and the third copper bar. The plurality of positioning posts are arranged at intervals, and the plurality of positioning posts are respectively in contact with the first copper bar, the second copper bar, and the third copper bar, so that the first copper bar, the second copper bar, and the third copper bar are staggered and stacked.

8. The laminated busbar hot pressing die according to claim 7, characterized in that: The first copper bar, the second copper bar, and the third copper bar all include a straight section and a plurality of bent sections. The plurality of bent sections are arranged at intervals on the side walls of the straight section. The plurality of positioning posts are respectively in contact with the bent section at the end of the first copper bar, the bent section at the end of the second copper bar, and the bent section at the end of the third copper bar.

9. The laminated busbar hot pressing die according to claim 7, characterized in that: The positioning posts are located below the second limiting block group, and the distance between two adjacent positioning posts is equal to the length of the second inner limiting portion.

10. The laminated busbar hot pressing die according to claim 7, characterized in that: The length direction of the positioning column is perpendicular to the length direction of the lower mold.

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