Circuit board structure of jumper copper bar structure with strong heat dissipation capability

Abstract

The utility model discloses a circuit board structure with a jumper copper bar structure with strong heat dissipation capability, which comprises power single boards and copper bars arranged on the power single boards, two ends of each copper bar are respectively welded on contacts of the power single boards, the copper bars are arranged on two different contacts of the same power single board, and the power single boards are connected with the power single boards. Or the copper bar is arranged on the contacts of the adjacent power single boards to connect the adjacent power single boards, and the cross section of the main body part of the copper bar is of a flat structure. The main body part of the copper bar is pressed to form the flat structure, so that the perimeter of the cross section of the main body part of the copper bar is increased under the condition that the cross section area of the main body part of the copper bar is not changed, the contact area between the copper bar and the air is increased, heat can be dissipated through the larger contact area when the copper bar is in contact with the air, and the heat dissipation efficiency is improved. And the heat dissipation effect of the copper bar is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic power equipment, in particular to a circuit board structure with a jumper copper bar structure having strong heat dissipation ability. Background Art

[0002] When the PCB traces of the power single board are limited by the layout of power devices and it is difficult to route the traces, a complete copper bar is selected to replace the PCB traces, thereby saving space on the PCB. Since the copper bar belongs to the power trace, it is prone to heat generation during operation. Because when wiring, the length and diameter of the copper bar are fixed, so Rcu is a fixed value, and its loss Pcu = I 2 *Rcu is also fixed. Therefore, in the prior art, it is difficult to optimize the heat dissipation effect of the copper bar.

[0003] Therefore, the prior art has defects and needs to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a circuit board structure with a jumper copper bar structure having strong heat dissipation ability.

[0005] The technical solution of the utility model is as follows: provide a circuit board structure with a jumper copper bar structure having strong heat dissipation ability, including: a power single board, and a copper bar arranged on the power single board, both ends of the copper bar are respectively welded to the contacts of the power single board, the copper bar is arranged on two different contacts of the same power single board, or the copper bar is arranged on the contacts of adjacent power single boards to connect adjacent power single boards, and the cross-section of the main body part of the copper bar is a flat structure.

[0006] Further, the cross-section of the main body part of the copper bar is oval or rectangular.

[0007] Further, the middle section of the cross-section of the main body part of the copper bar is a straight section, and both ends are arc sections.

[0008] Further, the main body part of the copper bar is formed by stamping.

[0009] Further, the cross-section of the welding parts at both ends of the copper bar is circular.

[0010] By adopting the above scheme, the utility model compresses the main body part of the copper bar to form a flat structure, so that the cross-sectional perimeter of the main body part of the copper bar increases while the cross-sectional area remains unchanged, thereby increasing the contact area between the copper bar and the air. When in contact with the air, heat can be dissipated through a larger contact area, effectively improving the heat dissipation effect of the copper bar. Description of the Drawings

[0011] Figure 1 Schematic diagram of the structure of the copper bar of the present utility model.

[0012] Figure 2 Side view of the copper bar of the present utility model.

[0013] Figure 3 Cross-sectional view of the main body part of the copper bar of the present utility model.

[0014] Figure 4 Schematic diagram of the structure of the unprocessed copper bar.

[0015] Figure 5 Cross-sectional view of the unprocessed copper bar. Specific implementation mode

[0016] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Please refer to Figures 1 to 3 , the present utility model provides a circuit board structure with a jumper copper bar structure having strong heat dissipation ability, including: a power single board, and a copper bar 1 disposed on the power single board, both ends of the copper bar 1 are respectively welded to the contacts of the power single board, the copper bar 1 is disposed on two different contacts of the same power single board, or the copper bar 1 is disposed on the contacts of adjacent power single boards to connect adjacent power single boards, and the cross-section of the main body part 11 of the copper bar 1 is a flat structure.

[0018] The main body part 11 of the copper bar is formed by stamping. The original cylindrical copper bar 1 is stamped, so that the main body part 11 of the copper bar 1 is pressed to form a flat structure, so that the cross-sectional perimeter of the main body part 11 of the copper bar 1 increases while the cross-sectional area remains unchanged, thereby increasing the contact area between the copper bar 1 and the air, facilitating heat dissipation through a larger contact area when contacting the air, and effectively improving the heat dissipation effect of the copper bar 1.

[0019] The cross-section of the main body part 11 of the copper bar 1 is an ellipse or a rectangle, or the middle section of the cross-section of the main body part 11 of the copper bar 1 is a straight line section and both ends are arc surface sections. For the copper bar 1 formed by stamping, its cross-section will form a shape with a flat surface at the stamping part and arc surfaces on both sides due to stamping, or the forming shape of the copper bar 1 after stamping is restricted by a stamping die, so as to ensure that the appearance of the copper bar 1 after stamping meets the requirements and avoid interference with other components during welding and assembly.

[0020] The cross-section of the welding part 12 at both ends of the copper bar 1 is circular, that is, the end welding part 12 is not stamped, so as to ensure that the two end welding parts 12 of the copper bar 1 can be stably and firmly welded to the contacts of the power single board.

[0021] Please refer toFigures 1 to 5 , in the embodiment provided by the present utility model, a copper bar 1 with a diameter of φ4 is used as a jumper on the power single board, and the copper bar 1 is subjected to stamping processing. The cross-section of the copper bar 1 before processing is as Figure 5 shown. Before processing, the cross-sectional area of the copper bar 1 is πr 2 = 3.14 * 2^2 = 12.56 mm 2 , and the cross-sectional perimeter is C 1 = 2πr = 2 * 3.14 * 2 = 12.56 mm. The main body part 11 of the copper bar 1 is stamped, and the cross-section after stamping processing is as Figure 3 shown. The main body part 11 of the copper bar 1 is stamped into a cross-section of 6.71 * 2, and its cross-sectional area is πr 2 + LxW = 3.14 * 1^2 + 4.71 * 2 = 12.56 mm 2 , the cross-sectional area of the processed main body part 11 remains unchanged, while the cross-sectional perimeter is C 2 = 2πr + 2L = 2 * 3.14 * 1 + 2 * 4.71 = 15.7 mm. It can be seen that compared with the cross-sectional perimeter before processing, the cross-sectional perimeter of the main body part 11 of the copper bar 1 after stamping processing increases by ΔC = C 2 - C 1 = 15.7 - 12.56 = 3.14 mm.

[0022] If the total length of the copper bar 1 is 120 mm and the length of the main body part 11 of the stamping processing is L 1 = 100 mm, then the surface area of the main body part 11 of the copper bar 1 stamped into a flat structure increases by ΔS = ΔC * L 1 = 3.14 * 100 = 314 mm 2 . Let the heat dissipation amount per unit area of the copper bar 1 be Q, then the heat dissipation amount after stamping the copper bar 1 increases by about 314Q, and its heat dissipation efficiency is greatly improved.

[0023] In summary, the present utility model forms a flat structure by pressing the main body part of the copper bar, so that the cross-sectional perimeter of the main body part of the copper bar increases while the cross-sectional area remains unchanged, thereby increasing the contact area between the copper bar and the air. When in contact with the air, heat can be dissipated through a larger contact area, effectively improving the heat dissipation effect of the copper bar.

[0024] The above is only a preferred embodiment of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A circuit board structure with a jumper copper strip structure having a strong heat dissipation capability, characterized in that: include: A power board and a copper bar arranged on the power board, wherein both ends of the copper bar are respectively welded to the contacts of the power board, the copper bar is arranged on two different contacts of the same power board, or the copper bar is arranged on the contacts of adjacent power boards to connect adjacent power boards, and the cross-section of the main part of the copper bar is a flat structure.

2. The circuit board structure with a jumper copper bar structure having a strong heat dissipation capability according to claim 1, characterized in that: The cross section of the main body of the copper strip is oval or rectangular.

3. The circuit board structure with a jumper copper bar structure having a strong heat dissipation capability according to claim 1, characterized in that: The middle section of the cross section of the main body of the copper strip is a straight line section, and both ends are arc surface sections.

4. The circuit board structure with a jumper copper bar structure having a strong heat dissipation capability according to claim 1, characterized in that: The main body of the copper strip is formed by stamping.

5. The circuit board structure with a jumper copper bar structure having a strong heat dissipation capability according to claim 1, characterized in that: The cross-section of the welding part at both side ends of the copper strip is circular.

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