Power distribution assembly for direct current charging pile

Abstract

The utility model relates to the technical field of charging piles, in particular to a power distribution assembly for a direct-current charging pile, which comprises a bracket main body, a conversion module in the direct-current charging pile and a direct-current high-voltage contactor, each group of direct-current high-voltage contactors consists of a first contactor connected to the positive pole output end of the conversion module and a second contactor connected to the negative pole output end, and the first contactor and the second contactor are arranged on the first mounting surface of the bracket main body and are correspondingly connected in series to form an annular loop; the annular loop is provided with a plurality of direct-current outlet copper bars, each direct-current outlet copper bar is provided with a first end connected with the annular loop and a second end extending to the second installation face of the support body, and the second end of each direct-current outlet copper bar forms a copper bar wiring area used for wiring of the charging terminal on the second installation face. According to the utility model, the space in the thickness direction of the cabinet is fully utilized, so that the power distribution assembly can realize more compact layout in a limited size.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, and more specifically, to a power distribution component for DC charging piles. Background Technology

[0002] Against the backdrop of global energy transition and increasing environmental awareness, electric vehicles (EVs), with their advantages of zero emissions and low energy consumption, are experiencing an unprecedented wave of adoption. With the rapid increase in the number of EVs, the construction and optimization of charging infrastructure has become a critical issue that urgently needs to be addressed. As one of the core components of an EV charging system, the charging cabinet's charging speed and efficiency directly impact user experience and the promotion and application of EVs. Therefore, increasing the power output of charging cabinets to achieve fast charging has become a research hotspot and development trend in the industry.

[0003] However, as the power of the charging station cabinet increases, the overall size of the cabinet also needs to increase accordingly due to the need to configure more power modules. In practical applications, the installation space for charging cabinets is often strictly limited. At the same time, manufacturers, for cost control reasons, need to minimize the cabinet size as much as possible while ensuring cabinet performance, in order to reduce raw material costs, processing costs, and transportation costs. This results in a significant reduction in the installation space left for the DC output power distribution section.

[0004] The existing power distribution structure wiring method of charging piles usually adopts the traditional planar layout, which cannot make full use of the thickness space of the cabinet. This results in a low power distribution value per unit space. This structural design not only wastes the internal space of the cabinet, but also limits the full utilization of the advantages of high-power cabinets, leading to a decrease in the utilization rate of power modules and failing to meet the high power distribution requirements of electric vehicle fast charging.

[0005] Therefore, how to achieve efficient power distribution within a limited cabinet space and improve the power distribution capacity per unit space has become a technical challenge that urgently needs to be solved in the design of current charging pile cabinets. Utility Model Content

[0006] The purpose of this utility model is to provide a power distribution component for DC charging piles. Through the three-dimensional layout of the two mounting surfaces on the front and back of the bracket body, the DC high-voltage contactor is centrally arranged on the back, and the circuit is connected through a ring circuit design. An independent copper busbar wiring area is formed on the front, thereby making full use of the thickness space of the cabinet and avoiding the wiring structure from occupying too much horizontal or vertical space. This allows the power distribution component to achieve a more compact layout within a limited size, thus solving the technical problem of how to achieve efficient power distribution within a limited cabinet space and improve the power distribution capacity per unit space.

[0007] This utility model is achieved through the following technical solution: a power distribution component for a DC charging pile, the power distribution component includes a support body, the support body having two mounting surfaces, front and back;

[0008] Each of the AD / DC conversion modules in the DC charging pile is equipped with a set of DC high-voltage contactors. Each set of DC high-voltage contactors consists of a first contactor connected to the positive output terminal of the AD / DC conversion module and a second contactor connected to the negative output terminal of the AD / DC conversion module. The first contactor and the second contactor are arranged on the first mounting surface of the bracket body and connected in series to form a loop.

[0009] The annular circuit is provided with a plurality of DC output copper busbars. Each DC output copper busbar has a first end connected to the annular circuit and a second end extending to a second mounting surface of the bracket body. The second end of each DC output copper busbar forms a copper busbar wiring area for wiring the charging terminal on the second mounting surface.

[0010] According to a preferred embodiment, the support body is composed of a first support body and a second support body arranged in parallel at intervals, and the second end of the DC output copper busbar extends to the second mounting surface through the arrangement gap between the first support body and the second support body.

[0011] According to a preferred embodiment, each first contactor is arranged on a first support body, and each second contactor is arranged on a second support body. The DC high voltage contactors located on the same first support body or second support body and adjacent to each other are connected sequentially by bridging copper busbars.

[0012] According to a preferred embodiment, the bridging copper busbar has a first main body region and first ends located at both ends of the first main body region;

[0013] The first end has a first mounting hole adapted to the DC high voltage contactor.

[0014] The first main body area has a plurality of first connection holes spaced apart along its length direction, which are adapted to the first end of the DC output copper busbar.

[0015] According to a preferred embodiment, the ring circuit includes an upper circuit formed on a first support body and a lower circuit formed on a second support body. Both the upper circuit and the lower circuit include a forward section, a transition section, and a return section formed by a DC high-voltage contactor and a bridging copper busbar. The forward section and the return section are arranged in parallel, and the transition section is connected between the forward section and the return section.

[0016] The DC output copper busbar includes a first output copper busbar connected to the outgoing section and a second output copper busbar connected to the return section, with the first output copper busbar and the second output copper busbar arranged alternately.

[0017] According to a preferred embodiment, the first outgoing copper busbar has a second main body region and a second end located at at least one end of the second main body region;

[0018] Wherein, the first outgoing copper busbar is provided with a second connecting hole that is adapted to the first connecting hole at the second end of the first mounting surface;

[0019] The second main body area is composed of an inclined transition section, a parallel transition section and a first vertical transition section connected in sequence. The first end of the inclined transition section is connected to the second end. The parallel transition section is arranged parallel to the first mounting surface. The first vertical transition section is located in the gap between the first support body and the second support body and is perpendicular to the first mounting surface. The end of the first vertical transition section away from the parallel transition section extends to the second mounting surface.

[0020] According to a preferred embodiment, a notch is provided between the inclined transition section and the second end.

[0021] According to a preferred embodiment, the second outgoing copper busbar has a third main body region and a third end located at at least one end of the third main body region;

[0022] The second copper busbar has a third connection hole adapted to the first connection hole on the third end of the first mounting surface.

[0023] The third main body region includes a second vertical transition section, which is located in the gap between the first support body and the second support body and is perpendicular to the first mounting surface. The end of the second vertical transition section away from the third end extends to the second mounting surface.

[0024] According to a preferred embodiment, the bridging copper busbar and the DC output copper busbar are soft copper busbars.

[0025] According to a preferred embodiment, a heat shrink tubing is fitted onto the second main body region of the first outgoing copper busbar and the third main body region of the second outgoing copper busbar.

[0026] The technical solution for a power distribution component for a DC charging pile provided by this utility model has at least the following advantages and beneficial effects:

[0027] (1) This utility model uses a three-dimensional layout of the two mounting surfaces on the front and back of the bracket body to centrally arrange the DC high voltage contactor on the back and achieve circuit connection through a ring circuit design. An independent copper busbar wiring area is formed on the front. Compared with the traditional planar wiring method, it makes full use of the thickness direction space of the cabinet, avoids the wiring structure from occupying too much horizontal or vertical space, and enables the power distribution components to achieve a more compact layout within a limited size.

[0028] (2) The DC output copper busbar extends from the front ring circuit to the back wiring area, which spatially separates the electrical connection between the charging terminal wiring and the internal power module, avoids the complex crossover of the front wiring, improves the wiring convenience and safety, and at the same time frees up the space on the front mounting surface for arranging more contactors or modules.

[0029] (3) By dividing the main body of the bracket into the first and second main bodies that are parallel to each other, the DC output copper busbar is extended by utilizing the longitudinal space between the two brackets to form a three-dimensional layout with vertical and horizontal penetration. Compared with a single bracket, the utilization of the longitudinal space allows the copper busbar to avoid winding in the plane, reducing the size occupied in the horizontal direction, adapting to the space utilization in the thickness direction of the cabinet, and further compressing the overall volume.

[0030] (4) The layered bracket structure enables the layered installation of components such as contactors and bridging copper busbars. Each layer of components is assembled independently and then connected by gap copper busbars, which reduces the installation difficulty, improves production efficiency, and facilitates later maintenance and component replacement.

[0031] (5) By arranging the first contactor and the second contactor on the upper and lower brackets respectively, the positive and negative circuits are separated in the longitudinal space, avoiding the staggered arrangement of positive and negative contactors in the same plane, reducing the electrical spacing requirements between adjacent contactors, so that more contactors can be arranged in a unit area, thereby increasing the total power. Attached Figure Description

[0032] Figure 1 Rear view of the power distribution assembly provided in Embodiment 1 of this utility model;

[0033] Figure 2 This is a schematic diagram of the left side of the support body provided in Embodiment 1 of this utility model;

[0034] Figure 3 This is a schematic diagram of the right side of the support body provided in Embodiment 1 of this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the first outgoing copper busbar provided in Embodiment 2 of this utility model;

[0036] Figure 5 This is a schematic diagram of the structure of the second outgoing copper busbar provided in Embodiment 2 of this utility model;

[0037] Reference numerals: 1-First contactor, 2-Second contactor, 3-First support body, 4-Second support body, 5-Arrangement gap, 6-Bridging copper busbar, 601-First main body area, 602-First end, 603-First mounting hole, 604-First connection hole, 7-First outgoing copper busbar, 701-Second main body area, 702-Second end, 703-Second connection hole, 8-Second outgoing copper busbar, 801-Third main body area, 802-Third end, 803-Third connection hole. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Example 1

[0040] To make full use of the thickness space of the cabinet and achieve a more compact layout within a limited size, this utility model proposes a power distribution component for DC charging piles.

[0041] The power distribution component for the DC charging pile in this embodiment includes a bracket body with two mounting surfaces, a first mounting surface corresponding to the back of the charging pile and a second mounting surface corresponding to the front of the charging pile.

[0042] In this embodiment, each AD / DC conversion module in the DC charging pile is equipped with a set of DC high-voltage contactors. Each set of DC high-voltage contactors consists of a first contactor 1 connected to the positive output terminal of the AD / DC conversion module and a second contactor 2 connected to the negative output terminal of the AD / DC conversion module. The first contactor 1 and the second contactor 2 are both arranged on the first mounting surface of the bracket body and connected in series to form a loop circuit. See details below. Figures 1 to 3 As shown.

[0043] Furthermore, the loop circuit is provided with a number of DC output copper busbars. Each DC output copper busbar has a first end connected to the loop circuit and a second end extending to a second mounting surface of the bracket body. The second end of each DC output copper busbar forms a copper busbar wiring area on the second mounting surface for wiring the charging terminal.

[0044] Specifically, by using the three-dimensional layout of the two mounting surfaces on the front and back of the bracket body, the DC high-voltage contactor is centrally arranged on the back, and the circuit is connected through a ring circuit design. An independent copper busbar wiring area is formed on the front, which can make full use of the thickness space of the cabinet and avoid the wiring structure occupying too much horizontal or vertical space, so that the power distribution components can achieve a more compact layout within a limited size.

[0045] In addition, the DC output copper busbar extends from the front ring circuit to the rear wiring area, which spatially separates the electrical connection of the charging terminal wiring from that of the internal power module, avoids the complex crossover of the front wiring, improves wiring convenience and safety, and frees up space on the front mounting surface for arranging more contactors or modules.

[0046] Example 2

[0047] This embodiment, based on the technical solution provided in Embodiment 1, further explains the structure of the support body:

[0048] In this embodiment, the support body is composed of a first support body 3 and a second support body 4 arranged in parallel at intervals. The second end of the DC output copper busbar extends to the second mounting surface through the arrangement gap 5 between the first support body 3 and the second support body 4.

[0049] This embodiment divides the main support body into two parallel and spaced-apart first and second support bodies 4. The DC output copper busbar is extended through the longitudinal space between the two support layers, forming a three-dimensional layout with vertical and horizontal penetration. Compared with a single-layer support, the utilization of longitudinal space eliminates the need for the copper busbar to meander in the plane, reducing the size occupied in the horizontal direction and adapting to the space utilization in the thickness direction of the cabinet, further compressing the overall volume. In addition, the layered support structure can realize the layered installation of components such as contactors and bridging copper busbars 6. After each layer of components is assembled independently, they are connected by gap copper busbars, which reduces the installation difficulty, improves production efficiency, and facilitates later maintenance and component replacement.

[0050] In some preferred embodiments, each first contactor 1 is arranged on the first support body 3, and each second contactor 2 is arranged on the second support body 4. The DC high voltage contactors located on the same first support body 3 or second support body 4 and adjacent to each other are connected sequentially by bridging copper busbars 6.

[0051] In this embodiment, by arranging the first contactor 1 and the second contactor 2 on the upper and lower brackets respectively, the positive and negative circuits are separated in the vertical space, avoiding the staggered arrangement of positive and negative contactors on the same plane, reducing the electrical spacing requirements between adjacent contactors, and thus allowing more contactors to be arranged in a unit area, thereby increasing the total power.

[0052] In some preferred embodiments, see Figure 4As shown, the bridging copper busbar 6 has a first main body area 601 and first ends 602 located at both ends of the first main body area 601. The first ends 602 are provided with first mounting holes 603 adapted to DC high voltage contactors. The first main body area 601 is provided with a plurality of first connection holes 604 adapted to the first ends of DC output copper busbars at intervals along its length direction.

[0053] In this embodiment, a standardized interface is formed by opening mounting holes adapted to the contactor at the first end 602 of the bridging copper busbar 6 and connecting holes adapted to the outgoing copper busbar in the first main body area 601. This allows for quick and easy fixing of the contactor to the copper busbar and the outgoing copper busbar to the loop circuit through pre-drilled holes, avoiding on-site measurement and custom wiring, thus improving assembly accuracy and efficiency. In addition, multiple connecting holes are spaced along the length of the bridging copper busbar 6, allowing outgoing copper busbars to be led out at different positions according to power distribution requirements. This adapts to the power distribution of multiple charging terminals, enabling flexible configuration of multiple outgoing lines in one circuit, improving the flexibility of power distribution and the adaptability of cabinet space.

[0054] In some preferred embodiments, the annular loop includes an upper loop formed on the first support body 3 and a lower loop formed on the second support body 4, see [reference]. Figure 2 and Figure 3 As shown, A1 to A11 on the first support body are the upper circuits, and A1 to A11 on the second support body are the lower circuits. Both the upper and lower circuits include a forward section, a transition section, and a return section formed by a DC high-voltage contactor and a bridging copper busbar 6. The forward and return sections are arranged in parallel, and the transition section is connected between the forward and return sections. The DC outgoing copper busbar includes a first outgoing copper busbar 7 connected to the forward section and a second outgoing copper busbar 8 connected to the return section. The first outgoing copper busbar 7 and the second outgoing copper busbar 8 are arranged alternately.

[0055] In this embodiment, both the upper and lower circuits include a parallel symmetrical structure with outgoing, transition, and return segments, which ensures that positive and negative currents are evenly distributed between the upper and lower layers, reducing circuit inductance and electromagnetic interference. At the same time, the parallel outgoing and return segments can form a low-impedance path, improving the stability of high-current transmission. In addition, the first outgoing copper busbar 7 and the second outgoing copper busbar 8 are arranged alternately, forming an orderly copper busbar wiring area on the back wiring area, avoiding spatial overlap of positive and negative outgoing copper busbars, reducing wiring difficulty and short-circuit risk, and facilitating cable differentiation during later maintenance.

[0056] In some preferred embodiments, see Figure 4As shown, the first copper busbar 7 has a second main body region 701 and a second end 702 located at at least one end of the second main body region 701. The first copper busbar 7 has a second connecting hole 703 adapted to the first connecting hole 604 on the second end 702 located on the first mounting surface. The second main body region 701 is composed of an inclined transition section, a parallel transition section and a first vertical transition section connected in sequence. The first end of the inclined transition section is connected to the second end 702. The parallel transition section is arranged parallel to the first mounting surface. The first vertical transition section is located in the arrangement gap 5 between the first support body 3 and the second support body 4 and is perpendicular to the first mounting surface. The end of the first vertical transition section away from the parallel transition section extends to the second mounting surface.

[0057] In this embodiment, the first outgoing copper busbar 7 adopts a three-dimensional bending design with an inclined transition section, a parallel transition section, and a vertical transition section. In particular, the vertical transition section passes through the gap between the upper and lower brackets and extends perpendicularly to the mounting surface to the back, transforming the copper busbar from a planar layout to a three-dimensional layout. This fully utilizes the thickness space of the cabinet, enabling the copper busbar to achieve cross-layer connection within limited horizontal and vertical dimensions, significantly reducing the floor area occupied. In addition, the combination of the inclined transition section and the parallel transition section can avoid the bracket body or other components, avoiding interference between the copper busbar and the bracket. The parallel transition section is parallel to the mounting surface, which facilitates the fixed connection of the ring circuit on the front, while the vertical transition section uses the gap to achieve through-layer outgoing lines. The overall structure adapts to the three-dimensional space of the layered brackets, improving the freedom of copper busbar layout.

[0058] In some preferred embodiments, a notch is provided between the inclined transition section and the second end 702.

[0059] In this embodiment, the notch between the inclined transition section and the second end 702 can reduce the material stress at the bend, especially the plastic deformation stress of the soft copper busbar when bending, and avoid fatigue fracture of the copper busbar caused by long-term high current heating; at the same time, the notch can serve as an installation positioning mark to facilitate quick alignment of the copper busbar with the contactor or bridging copper busbar 6.

[0060] In some preferred embodiments, see Figure 5 As shown, the second lead-out copper busbar 8 has a third main body region 801 and a third end 802 located at at least one end of the third main body region 801. The second lead-out copper busbar 8 has a third connecting hole 803 adapted to the first connecting hole 604 on the third end 802 located on the first mounting surface. The third main body region 801 includes a second vertical transition section. The second vertical transition section is located in the arrangement gap 5 between the first support body 3 and the second support body 4 and is perpendicular to the first mounting surface. The end of the second vertical transition section away from the third end 802 extends to the second mounting surface.

[0061] In this embodiment, the second outgoing copper busbar 8 only passes through the layer via a vertical transition section. Compared with the multiple bends of the first outgoing copper busbar 7, the structure is simpler, reducing processing costs and installation time. It is suitable for connection scenarios where the negative circuit does not require complex transitions. The differentiated design of the first outgoing copper busbar 7 forms an efficient cooperation between the positive and negative circuits. In addition, both the positive and negative outgoing copper busbars extend to the second mounting surface on the back through a vertical transition section, so that all charging terminal wiring is concentrated on the same plane, which facilitates unified management and protection of cables and improves the cleanliness and safety of the cabinet.

[0062] In some preferred embodiments, the bridging copper busbar 6 and the DC output copper busbar are made of soft copper busbar.

[0063] This embodiment uses soft copper busbars instead of traditional hard copper busbars. They can be bent arbitrarily according to the bracket gap and the shape of the mounting surface, adapting to complex paths in three-dimensional layouts. This avoids the processing difficulty and size limitations of bending hard copper busbars, further compressing the installation space and improving structural compactness. In addition, soft copper busbars can absorb stress through their own deformation when subjected to high current impacts or cabinet vibrations, reducing the risk of fatigue damage at connection points and improving the reliability and lifespan of power distribution components.

[0064] In some preferred embodiments, heat shrink tubing is fitted onto the second main body region 701 of the first outgoing copper busbar 7 and the third main body region 801 of the second outgoing copper busbar 8.

[0065] This embodiment uses heat shrink tubing to insulate the exposed surface of the copper busbar, especially in confined spaces, preventing short circuits caused by insufficient insulation between adjacent copper busbars or support structures. Simultaneously, the heat shrink tubing can withstand high current heating, improving electrical safety in high-temperature environments. Furthermore, the color of the heat shrink tubing can be customized, facilitating the differentiation between positive and negative circuit copper busbars and improving installation and maintenance efficiency. Additionally, the smooth surface of the heat shrink tubing reduces dust and moisture adhesion, indirectly improving the conductivity and lifespan of the copper busbar.

[0066] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A power distribution component for a DC charging pile, characterized in that, The power distribution assembly includes a support body, which has two mounting surfaces, a front and a back. The AD / DC conversion module in the DC charging pile is equipped with a set of DC high voltage contactors. Each set of DC high voltage contactors consists of a first contactor (1) connected to the positive output terminal of the AD / DC conversion module and a second contactor (2) connected to the negative output terminal of the AD / DC conversion module. The first contactor (1) and the second contactor (2) are arranged on the first mounting surface of the bracket body and connected in series to form a ring circuit. The annular circuit is provided with a plurality of DC output copper busbars. Each DC output copper busbar has a first end connected to the annular circuit and a second end extending to a second mounting surface of the bracket body. The second end of each DC output copper busbar forms a copper busbar wiring area for wiring the charging terminal on the second mounting surface.

2. The power distribution assembly for a DC charging pile as described in claim 1, characterized in that, The main body of the bracket consists of a first bracket body (3) and a second bracket body (4) arranged in parallel at intervals. The second end of the DC output copper busbar extends to the second mounting surface through the arrangement gap (5) between the first bracket body (3) and the second bracket body (4).

3. The power distribution assembly for a DC charging pile as described in claim 2, characterized in that, Each first contactor (1) is arranged on the first support body (3), and each second contactor (2) is arranged on the second support body (4). The DC high voltage contactors located on the same first support body (3) or second support body (4) and adjacent to each other are connected sequentially by bridging copper busbars (6).

4. The power distribution assembly for a DC charging pile as described in claim 3, characterized in that, The bridging copper busbar (6) has a first main body region (601) and first ends (602) located at both ends of the first main body region (601); The first end (602) is provided with a first mounting hole (603) adapted to the DC high voltage contactor; The first main body area (601) is provided with a plurality of first connection holes (604) that are adapted to the first end of the DC output copper busbar along its length direction.

5. The power distribution assembly for a DC charging pile as described in claim 4, characterized in that, The ring circuit includes an upper circuit formed on the first support body (3) and a lower circuit formed on the second support body (4). The upper circuit and the lower circuit each include a forward section, a transition section and a return section formed by a DC high voltage contactor and a bridging copper busbar (6). The forward section and the return section are arranged in parallel, and the transition section is connected between the forward section and the return section. The DC output copper busbar includes a first output copper busbar (7) connected to the outgoing section and a second output copper busbar (8) connected to the return section, with the first output copper busbar (7) and the second output copper busbar (8) arranged at intervals.

6. The power distribution assembly for a DC charging pile as described in claim 5, characterized in that, The first outgoing copper busbar (7) has a second main body region (701) and a second end (702) located at at least one end of the second main body region (701); The first copper busbar (7) has a second connecting hole (703) adapted to the first connecting hole (604) on the second end (702) of the first mounting surface; The second main body area (701) is composed of an inclined transition section, a parallel transition section and a first vertical transition section connected in sequence. The first end of the inclined transition section is connected to the second end (702). The parallel transition section is arranged parallel to the first mounting surface. The first vertical transition section is located in the arrangement gap (5) between the first support body (3) and the second support body (4) and is perpendicular to the first mounting surface. The end of the first vertical transition section away from the parallel transition section extends to the second mounting surface.

7. The power distribution assembly for a DC charging pile as described in claim 6, characterized in that, A gap is provided between the inclined transition section and the second end (702).

8. The power distribution assembly for a DC charging pile as described in claim 6, characterized in that, The second outgoing copper busbar (8) has a third main body region (801) and a third end (802) located at at least one end of the third main body region (801); The second copper busbar (8) has a third connecting hole (803) on the third end (802) of the first mounting surface that is adapted to the first connecting hole (604); The third main body area (801) includes a second vertical transition section, which is located in the arrangement gap (5) between the first support body (3) and the second support body (4) and is perpendicular to the first mounting surface. The end of the second vertical transition section away from the third end (802) extends to the second mounting surface.

9. The power distribution assembly for a DC charging pile as described in claim 8, characterized in that, The bridging copper busbar (6) and the DC output copper busbar are soft copper busbars.

10. The power distribution assembly for a DC charging pile as described in claim 9, characterized in that, Heat shrink tubing is fitted onto the second main body area (701) of the first outgoing copper busbar (7) and the third main body area (801) of the second outgoing copper busbar (8).

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