DC charging pile power supply structure with isolation transformer

Abstract

This utility model discloses a DC charging pile power supply structure with an isolation transformer. The structure includes a fixed frame, a heat dissipation grid, a cable hole, a telescopic copper busbar, and an isolation transformer. The fixed frame is fixed to the outer surface of the isolation transformer. The heat dissipation grid and the isolation transformer are integrated. The cable hole connects the cable to the isolation transformer. The telescopic copper busbar connects the isolation transformer and the charging pile rectifier. The telescopic copper busbar includes a copper busbar, an insulating sleeve, and a mounting plate. The insulating sleeve is fitted onto the outer surface of the copper busbar, and the copper busbar moves and engages with the surface of the mounting plate. The insulating sleeve provides telescopic protection for the copper busbar. During the translation process, the extended copper busbar remains in close contact with the main copper busbar, achieving adaptive adjustment through sliding contact. This ensures that the rectifier connection end can flexibly match the rectifier's installation distance. This structural design effectively avoids stress concentration or plastic deformation of the copper busbar due to installation deviations, improving the reliability and mechanical stability of the electrical connection.

Description

Technical Field

[0001] This utility model belongs to the field of transformers, and more specifically, it relates to the power supply structure of a DC charging pile with an isolation transformer. Background Technology

[0002] The DC charging pile power supply structure with isolation transformer achieves electrical isolation between input and output through a built-in high-frequency isolation transformer, effectively suppressing DC components and improving safety and anti-interference capabilities.

[0003] During the alignment and installation of the isolation transformer and the charging pile, if there is any misalignment between the two, the copper busbars of the rigid connection are more likely to bear additional mechanical stress. This stress concentration phenomenon can easily cause plastic deformation of the copper busbars, thereby affecting the reliability of the electrical connection, and may even cause safety hazards such as increased contact resistance and local overheating. Utility Model Content

[0004] To solve the aforementioned technical problems, the purpose and effectiveness of the DC charging pile power supply structure of the isolation transformer of this utility model are achieved by the following specific technical means: Its structure includes a fixing frame, a heat dissipation grid, a cable hole, a telescopic copper busbar, and an isolation transformer. The fixing frame is fixed to the outer surface of the isolation transformer. The heat dissipation grid and the isolation transformer are an integrated structure. The cable hole connects the cable into the isolation transformer. The telescopic copper busbar connects the isolation transformer and the charging pile rectifier. The telescopic copper busbar includes a copper busbar, an insulating sleeve, and a mounting plate. The insulating sleeve is fitted onto the outer surface of the copper busbar, and the copper busbar is located on the surface of the mounting plate for movable cooperation. The insulating sleeve provides telescopic protection for the copper busbar.

[0005] As a further improvement of this utility model, the copper busbar includes a transformer connection end, a protrusion, a spring, a limiting port, an extension copper busbar, a rectifier connection end, a limiting block, a main copper busbar, and a groove. The transformer connection end and the main copper busbar are an integrated structure. The protrusion and the groove cooperate to move. The spring is installed between the limiting block and the main copper busbar. The limiting port is located on the mounting plate for locking. The rectifier connection end and the extension copper busbar are an integrated structure. The main copper busbar is fixed to the surface of the mounting plate. The cooperation between the protrusion and the groove allows the extension copper busbar to continuously adhere to the main copper busbar when it moves.

[0006] As a further improvement of this utility model, the mounting plate includes a stop block, a base plate, and a limiting strip. The stop block and the limiting strip are an integrated structure. The stop block and the limiting strip are fixed to the surface of the base plate. The stop block limits the extension copper busbar and prevents it from coming out.

[0007] As a further improvement of this utility model, the contact surface between the main copper busbar and the extended copper busbar is coated with a silver-nickel alloy. The elasticity of the spring itself assists the extended copper busbar in adapting to the connection distance of the rectifier. The transformer connection end and the rectifier connection end are blade plugs. The round holes provided at the transformer connection end and the rectifier connection end facilitate snap-fit ​​connection and fixation with the equipment.

[0008] As a further improvement of this utility model, the insulating sleeve is made of heat-shrinkable silicone rubber that wraps around the entire copper busbar. The middle section of the insulating sleeve is stacked and changes with the expansion and contraction of the copper busbar. The mounting plate is fixed to the surface of the isolation transformer to provide support.

[0009] As a further improvement of this utility model, the spring is provided in two symmetrical structures, the extended copper busbar moves in close contact with the surface of the main copper busbar, the groove and the extended copper busbar are integrated structures, and the limiting port assists the whole to move on the limiting strip.

[0010] Compared with the prior art, the present invention has the following beneficial effects: Firstly, the extended copper busbar remains in close contact with the main copper busbar during the translation process, and adaptive adjustment is achieved through sliding contact. This ensures that the rectifier connection end can flexibly match the installation distance of the rectifier. This structural design effectively avoids stress concentration or plastic deformation of the copper busbar caused by installation deviation, and improves the reliability and mechanical stability of the electrical connection.

[0011] Secondly, the contact surface between the extension copper busbar and the main copper busbar is coated with a highly conductive silver-nickel alloy, which maintains low contact resistance during the extension and contraction adjustment process and reduces contact impedance fluctuations caused by relative displacement. This material selection not only enhances wear resistance and oxidation resistance, but also ensures stable electrical performance during dynamic connection, thereby improving the overall system's energy efficiency and long-term reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the DC charging pile power supply structure of the isolation transformer of this utility model.

[0013] Figure 2 This is a schematic diagram of the telescopic copper busbar of this utility model.

[0014] Figure 3 This is a schematic diagram of the internal structure of the copper busbar of this utility model.

[0015] Figure 4 This is a schematic diagram of the mounting plate of this utility model.

[0016] Figure 5 This is a schematic diagram of the structure of the copper busbar of this utility model.

[0017] In the diagram: Fixing frame-1, heat dissipation grid-2, cable hole-3, telescopic copper busbar-4, isolation transformer-5, copper busbar-41, insulating sleeve-42, mounting plate-43, transformer connection end-11, protrusion-12, spring-13, limit port-14, extension copper busbar-15, rectifier connection end-16, limit block-17, main copper busbar-18, groove-19, stop block-31, base plate-32, limit strip-33. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: As attached Figure 1 To be continued Figure 5 As shown: This utility model provides a DC charging pile power supply structure with an isolation transformer. The structure includes a fixing frame 1, a heat dissipation grid 2, a cable hole 3, a telescopic copper busbar 4, and an isolation transformer 5. The fixing frame 1 is fixed to the outer surface of the isolation transformer 5. The heat dissipation grid 2 and the isolation transformer 5 are an integrated structure. The cable hole 3 connects the cable to the isolation transformer 5. The telescopic copper busbar 4 connects the isolation transformer 5 and the charging pile rectifier. The telescopic copper busbar 4 includes a copper busbar 41, an insulating sleeve 42, and a mounting plate 43. The insulating sleeve 42 is fitted onto the outer surface of the copper busbar 41. The copper busbar 41 moves and engages with the surface of the mounting plate 43. The insulating sleeve 42 provides telescopic protection for the copper busbar 41. The fixing frame 1 assists in the fixed installation of the isolation transformer 5.

[0019] The copper busbar 41 includes a transformer connection end 11, a protrusion 12, a spring 13, a limiting port 14, an extension copper busbar 15, a rectifier connection end 16, a limiting block 17, a main copper busbar 18, and a groove 19. The transformer connection end 11 and the main copper busbar 18 are integrated. The protrusion 12 and the groove 19 cooperate to move. The spring 13 is installed between the limiting block 17 and the main copper busbar 18. The limiting port 14 is located on the mounting plate 43 for locking. The rectifier connection end 16 and the extension copper busbar 15 are integrated. The main copper busbar 18 is fixed to the surface of the mounting plate 43. The cooperation of the protrusion 12 and the groove 19 allows the extension copper busbar 15 to continuously adhere to the main copper busbar 18 when it moves. The spring 13 is arranged in a cross configuration, making it easier to return to its original position under pressure.

[0020] The mounting plate 43 includes a stop block 31, a base plate 32, and a limiting strip 33. The stop block 31 and the limiting strip 33 are an integrated structure. The stop block 31 and the limiting strip 33 are fixed to the surface of the base plate 32. The stop block 31 limits the extension copper busbar 15 to prevent it from coming out. The stop block 31 and the limiting strip 33 are a cross-shaped structure.

[0021] The contact surfaces of the main copper busbar 18 and the extension copper busbar 15 are coated with a silver-nickel alloy. The elasticity of the spring 13 helps the extension copper busbar 15 to adapt to the connection distance of the rectifier. The transformer connection end 11 and the rectifier connection end 16 are blade plugs. The round holes provided on the transformer connection end 11 and the rectifier connection end 16 facilitate their snap-fit ​​connection and fixation with the equipment. The extension copper busbar 15 is fitted onto the outer surface of the main copper busbar 18.

[0022] The insulating sleeve 42 is made of heat-shrinkable silicone rubber that wraps around the copper busbar 41. The middle section of the insulating sleeve 42 is stacked and changes with the expansion and contraction of the copper busbar 41. The mounting plate 43 is fixed to the surface of the isolation transformer 5 and serves as a support. The connection between the insulating sleeve 42 and the copper busbar 41 is locally heated by a hot air gun to form a tight wrap.

[0023] Among them, there are two springs 13 with a symmetrical structure, the extension copper busbar 15 moves in close contact with the surface of the main copper busbar 18, the groove 19 and the extension copper busbar 15 are integrated, the limiting port 14 assists the whole to move on the limiting strip 33, and the base plate 32 assists the copper busbar 41 to move smoothly.

[0024] The specific usage and function of this embodiment are as follows: In this utility model, when the isolation transformer 5 is installed in alignment with the charging pile, the electrical connection is achieved through the telescopic copper busbar 4. Specifically, the copper busbar 41 is fixedly connected to the isolation transformer 5, while the rectifier connection end 16 is connected to the rectifier through the extension copper busbar 15. When there is a distance deviation at the connection end, the extension copper busbar 15 can move along the groove 19 on the protrusion 12. During this process, the limiting block 17 exerts a squeezing effect on the spring 13, and the limiting port 14 slides along the limiting strip 33, thereby ensuring that the rectifier connection end 16 can adaptively adjust the connection distance with the rectifier. While achieving distance compensation, this mechanism completely maintains the electrical connection function between the main copper busbar 18 and the extension copper busbar 15 without being affected.

[0025] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A DC charging pile power supply structure with an isolation transformer, comprising a fixing frame (1), a heat dissipation grid (2), a cable hole (3), a telescopic copper busbar (4), and an isolation transformer (5). The fixing frame (1) is fixed to the outer surface of the isolation transformer (5). The heat dissipation grid (2) and the isolation transformer (5) are integrated. The cable hole (3) connects the cable to the isolation transformer (5). The telescopic copper busbar (4) connects the isolation transformer (5) and the charging pile rectifier. The structure is characterized by: The telescopic copper busbar (4) includes a copper busbar (41), an insulating sleeve (42), and a mounting plate (43). The insulating sleeve (42) is fitted on the outer surface of the copper busbar (41), and the copper busbar (41) is located on the surface of the mounting plate (43) for movement and cooperation.

2. The DC charging pile power supply structure of the isolation transformer according to claim 1, characterized in that: The copper busbar (41) includes a transformer connection end (11), a protrusion (12), a spring (13), a limiting port (14), an extension copper busbar (15), a rectifier connection end (16), a limiting block (17), a main copper busbar (18), and a groove (19). The transformer connection end (11) and the main copper busbar (18) are an integrated structure. The protrusion (12) and the groove (19) move together. The spring (13) is installed between the limiting block (17) and the main copper busbar (18). The limiting port (14) is located on the mounting plate (43) for locking. The rectifier connection end (16) and the extension copper busbar (15) are an integrated structure. The main copper busbar (18) is fixed to the surface of the mounting plate (43).

3. The DC charging pile power supply structure of the isolation transformer according to claim 1, characterized in that: The mounting plate (43) includes a stop block (31), a base plate (32), and a limiting strip (33). The stop block (31) and the limiting strip (33) are an integrated structure, and the stop block (31) and the limiting strip (33) are fixed to the surface of the base plate (32).

4. The DC charging pile power supply structure of the isolation transformer according to claim 2, characterized in that: The contact surfaces of the main copper busbar (18) and the extension copper busbar (15) are coated with silver-nickel alloy. The elasticity of the spring (13) itself assists the extension copper busbar (15) in adapting to the connection distance of the rectifier. The transformer connection end (11) and the rectifier connection end (16) are blade plugs.

5. The DC charging pile power supply structure of the isolation transformer according to claim 1, characterized in that: The insulating sleeve (42) is made of heat-shrinkable silicone rubber that wraps around the entire copper busbar (41). The middle section of the insulating sleeve (42) is stacked and changes along with the expansion and contraction of the copper busbar (41).

6. The DC charging pile power supply structure of the isolation transformer according to claim 2, characterized in that: The spring (13) has two springs and is symmetrical. The extended copper busbar (15) moves in close contact with the surface of the main copper busbar (18). The groove (19) and the extended copper busbar (15) are an integrated structure.

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