A charging pile power supply structure with excellent heat dissipation performance

Abstract

The application discloses a charging pile power supply structure with excellent heat dissipation performance and belongs to the field of charging pile heat dissipation. The charging pile power supply structure with excellent heat dissipation performance comprises a charging pile body, a power supply shell is arranged in the charging pile body, characterized in that an intermediate water cooling assembly is arranged in the power supply shell, a mounting shell is arranged on the side wall of the charging pile body, and a circulating pump is arranged in the mounting shell. The M-shaped water cooling flow channel is provided, turbulence protrusions are equidistantly arranged in the M-shaped water cooling flow channel, and the sawtooth vortex grooves of the bottom wall of the flow channel are matched, so that the heat dissipation efficiency and the scale prevention capability are doubled. The M-shaped shape and the turbulence protrusions can break the fluid laminar state and thin the heat exchange boundary layer, the continuous shear force generated by the micro vortex is utilized by the sawtooth vortex grooves, the solid particles are effectively prevented from adhering to the wall surface and the scale is prevented from accumulating at the bending part and the back water surface of the protrusions, and the heat balance of the high-power power supply module during full-load operation is ensured.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology for charging piles, and in particular to a power supply structure for charging piles with excellent heat dissipation performance. Background Technology

[0002] With the popularization of DC fast charging technology, power modules for high-power charging piles of 60kW and above have become the mainstream in the market. The power devices integrated inside, such as IGBT modules and high-frequency transformers, generate a huge amount of heat when running at full load, which puts extremely high demands on the reliability of the heat dissipation system. At present, such power modules generally adopt liquid cooling heat dissipation solutions. By installing cold plates on the side of power devices, and using a circulating pump to drive the coolant to flow in the internal flow channel to remove heat, the existing flow channel structure mostly adopts a simple straight line or U-shaped reciprocating design, and uses aluminum alloy plates that are machined and then sealed by bolt fastening.

[0003] However, existing heat dissipation structures still have significant drawbacks in high-performance application scenarios: First, the simple flow channel design results in the fluid being mostly in a laminar flow state inside, with a thick heat exchange boundary layer, making it difficult to meet the heat exchange efficiency requirements for high-density heat dissipation; Second, scale tends to adhere to the flow channel walls during long-term circulation, and tiny metal debris generated by system wear in the medium is very likely to accumulate in narrow or bent parts of the flow channel. Existing passive filters lack self-cleaning capabilities, and once clogged, they will cause a sharp increase in pressure loss or even overheating and damage to the module, thus affecting the stable operation of the charging pile power module in outdoor environments. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art mentioned above, and to propose a charging pile power supply structure with excellent heat dissipation performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A power supply structure for a charging pile with excellent heat dissipation performance includes a charging pile body, and a power supply housing is installed inside the charging pile body. The power supply housing is characterized in that an intermediate water cooling assembly is installed inside the power supply housing, an mounting shell is installed on the side wall of the charging pile body, a circulation pump is installed inside the mounting shell, and an outlet pipe and an inlet pipe are respectively connected to the two sides between the circulation pump and the intermediate water cooling assembly. The intermediate water-cooling assembly has a water-cooling channel inside, and turbulence protrusions are installed inside the water-cooling channel.

[0006] Preferably, heat dissipation devices are installed at both the upper and lower ends of the intermediate water-cooling assembly, and a stacked busbar is installed on the side wall of the power supply housing.

[0007] Preferably, the water-cooled flow channel is "M" shaped, and its two sides are connected to the water outlet pipe and the water inlet pipe, respectively. The turbulent protrusions are evenly distributed inside the water-cooled flow channel.

[0008] Preferably, the bottom wall of the water-cooled flow channel is provided with a transverse groove, the depth of which gradually increases towards the bend of the water-cooled flow channel, and the inner wall of the transverse groove is provided with a vortex groove, which is serrated in shape, with the tips of the vortex groove pointing downstream of the water flow.

[0009] Preferably, the outlet pipe has an internal flow channel, which includes a constant diameter section and tapering sections at both ends of the constant diameter section. The inner diameter of the constant diameter section remains consistent along the axial direction, and the inner diameter of the tapering sections decreases uniformly from the constant diameter section towards the edge of the pipe. A lower-level filter screen is installed on the side of the internal flow channel away from the circulating pump. A rotating rod is rotatably connected to the axis of the lower-level filter screen, and a turbine is installed on the surface of the rotating rod. A support member is installed on the inner wall of the internal flow channel, and the rotating rod is rotatably connected inside the support member.

[0010] Preferably, the surface of the outlet pipe is connected to a connecting pipe, and the outlet pipe is connected to the interior of the circulation pump through the connecting pipe. The inner wall of the connecting pipe is provided with a snap-fit ​​groove, and a snap-fit ​​ring is snapped into the inside of the snap-fit ​​groove. An upper-level filter screen is snapped into the surface of the snap-fit ​​ring, and the upper-level filter screen is disposed inside the snap-fit ​​groove.

[0011] Preferably, a collection box is snapped into the inside of the snap-fit ​​groove, the top of the collection box has a groove, the top of the groove is fitted with a downwardly inclined baffle, and the upper filter screen is attached to the surface of the collection box.

[0012] Preferably, the rotating rod and the upper filter screen are coaxially arranged, the rotating rod passes through both ends of the upper filter screen, and a guide groove is provided inside the right end of the rotating rod. The guide groove is shaped like a flared mouth with its inner diameter gradually increasing to the right. A through hole is provided inside the guide groove. A cross arm is connected to the surface of the rotating rod, and a flow groove is provided inside the cross arm. The flow groove is connected to the inside of the guide groove through the through hole.

[0013] Preferably, the surface of the cross arm is provided with a nozzle, and a brush is connected to the surface of the cross arm. The brush and the nozzle are arranged on the same side, and the brush is attached to the surface of the upper filter screen.

[0014] Preferably, the rear end of the charging pile body is provided with a ventilation opening, and the rear end of the charging pile body is rotatably connected with a protective door.

[0015] Compared with the prior art, the present invention provides a charging pile power supply structure with excellent heat dissipation performance, and has the following beneficial effects: 1. This charging pile power structure with excellent heat dissipation performance achieves a dual improvement in heat dissipation efficiency and scale prevention by setting an M-shaped water-cooling channel and equidistantly arranged turbulent protrusions inside it, combined with the sawtooth vortex grooves on the bottom wall of the channel. The M-shaped shape and turbulent protrusions can break the laminar flow state of the fluid and thin the heat exchange boundary layer, while the sawtooth vortex grooves utilize the continuous shear force generated by micro vortices to effectively prevent solid particles from adhering to the wall surface and scale from accumulating at bends and on the back water surface of the protrusions, ensuring the thermal balance of the high-power power module when running at full load.

[0016] 2. The charging pile power structure with excellent heat dissipation utilizes a turbine to capture water flow energy to drive the rotating rod to rotate, enabling the brush to work in tandem with the high-pressure jet generated by the guide groove and centrifugal pressurization. This allows for the immediate stripping and flushing of impurities from the upper filter screen, avoiding the risk of increased pressure loss and leakage caused by clogging of traditional filters.

[0017] 3. The charging pile power structure with excellent heat dissipation adopts an expanded internal flow channel structure with tapered ends and constant diameter in the middle, combined with a collection box with a one-way baffle below. This optimizes the pressure balance and impurity collection inside the flow channel. The expanded diameter section design effectively recovers static pressure, offsets the local pressure loss caused by the installation of internal devices, and maintains the high throughput of the system. The still water zone formed by the collection box ensures that fallen impurities are unidirectionally intercepted and not rolled up again, reducing the system maintenance frequency and the mechanical wear of the circulation pump. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a charging pile power supply structure with excellent heat dissipation performance proposed in this invention. Figure 2 This is a schematic diagram of the internal structure of a charging pile power supply structure with excellent heat dissipation performance proposed in this invention. Figure 3 This is a top cross-sectional view of a charging pile power supply structure with excellent heat dissipation performance proposed in this invention. Figure 4 This is a top-view cross-sectional view of the intermediate water-cooling assembly of a charging pile power supply structure with excellent heat dissipation performance proposed in this invention. Figure 5 This is a schematic diagram of the internal structure of the intermediate water-cooling assembly of a charging pile power supply structure with excellent heat dissipation performance proposed in this invention. Figure 6 This invention proposes a charging pile power supply structure with excellent heat dissipation performance. Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the internal structure of the water outlet pipe of a charging pile power supply structure with excellent heat dissipation performance proposed in this invention. Figure 8This is a schematic diagram of the upper-level filter screen after disassembly, which is part of the power supply structure for a charging pile with excellent heat dissipation performance proposed in this invention. Figure 9 This invention proposes a charging pile power supply structure with excellent heat dissipation performance. Figure 7 Enlarged structural diagram at point B.

[0019] In the diagram: 1. Charging pile body; 2. Power supply housing; 31. Intermediate water-cooling assembly; 32. Heat dissipation device; 33. Stacked busbar; 41. Mounting shell; 42. Circulation pump; 43. Water outlet pipe; 44. Water inlet pipe; 45. Water-cooling channel; 46. Turbulent flow protrusion; 47. Transverse groove; 48. Vortex channel; 501. Inner flow channel; 502. Lower stage filter screen; 503. Rotating rod; 504. Turbine; 505. Support component; 506. Connecting pipe; 507. Snap-fit ​​groove; 508. Collection box; 509. Snap-fit ​​ring; 510. Upper stage filter screen; 511. Guide groove; 512. Through hole; 513. Cross arm; 514. Flow groove; 515. Nozzle; 516. Brush; 61. Ventilation port; 62. Protective door. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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. Therefore, they should not be construed as limitations on this invention.

[0022] Reference Figures 1-9 A power supply structure for a charging pile with excellent heat dissipation performance includes a charging pile body 1, and a power supply housing 2 installed inside the charging pile body 1. The power supply housing 2 is characterized by having an intermediate water-cooling assembly 31 installed inside. A mounting shell 41 is installed on the side wall of the charging pile body 1, and a circulation pump 42 is installed inside the mounting shell 41. The circulation pump 42 is a shielded centrifugal pump, and its bearing material is ceramic or graphite. This is used to maintain a pressure output sufficient to overcome the pressure loss of the M-shaped flow channel while avoiding mechanical wear caused by tiny particles in the coolant, ensuring long-term stable operation of the system. An outlet pipe 43 and an inlet pipe 44 are respectively connected to the two sides between the circulation pump 42 and the intermediate water-cooling assembly 31. A water-cooling flow channel 45 is opened inside the intermediate water-cooling assembly 31, and turbulent flow protrusions 46 are installed inside the water-cooling flow channel 45.

[0023] Reference Figures 2-3 The upper and lower ends of the intermediate water-cooling assembly 31 are equipped with heat dissipation devices 32, the side wall of the power supply housing 2 is equipped with a stacked busbar 33, the rear end of the charging pile body 1 is provided with a ventilation opening 61, and the rear end of the charging pile body 1 is rotatably connected with a protective door 62.

[0024] Reference Figures 2-6 The water-cooled flow channel 45 is shaped like an "M". The two sides of the water-cooled flow channel 45 are connected to the water outlet pipe 43 and the water inlet pipe 44 respectively. Turbulent protrusions 46 are distributed at equal intervals inside the water-cooled flow channel 45.

[0025] The bottom wall of the water-cooled channel 45 is provided with transverse grooves 47. The depth of the transverse grooves 47 gradually increases towards the bend of the water-cooled channel 45. The inner wall of the transverse grooves 47 is provided with vortex grooves 48. The vortex grooves 48 are set in a sawtooth shape, with the tips of the vortex grooves 48 pointing downstream of the water flow. The sawtooth-shaped vortex grooves 48 form a biomimetic anti-adhesion structure. The micro secondary vortices induced by the tips of the teeth generate continuous shear force, pushing the micro particles away from the wall surface. Combined with the groove depth adjusted with the flow velocity, a strengthened self-flushing effect is achieved in dead corner areas such as the bend of the channel and the back surface of the turbulent protrusion 46.

[0026] Reference Figure 4 , Figure 7 , Figure 8 and Figure 9 The outlet pipe 43 has an internal flow channel 501, which includes a constant diameter section and tapering sections at both ends of the constant diameter section. The inner diameter of the constant diameter section is consistent along the axial direction, and the inner diameter of the tapering section decreases uniformly from the constant diameter section to the edge of the pipe. The expansion section design of the internal flow channel 501 achieves static pressure increase by reducing the flow velocity, in order to compensate for the local pressure loss caused by the turbine 504 installed in the flow channel. A lower-level filter screen 502 is installed on the side of the internal flow channel 501 away from the circulating pump 42. A rotating rod 503 is rotatably connected to the axis of the lower-level filter screen 502. A turbine 504 is installed on the surface of the rotating rod 503. A support member 505 is installed on the inner wall of the internal flow channel 501, and the rotating rod 503 is rotatably connected to the inside of the support member 505.

[0027] The surface of the outlet pipe 43 is connected to a connecting pipe 506. The outlet pipe 43 is connected to the interior of the circulating pump 42 through the connecting pipe 506. The inner wall of the connecting pipe 506 is provided with a snap-fit ​​groove 507. A snap-fit ​​ring 509 is snapped into the inside of the snap-fit ​​groove 507. An upper-level filter screen 510 is snapped into the surface of the snap-fit ​​ring 509. The upper-level filter screen 510 is located inside the snap-fit ​​groove 507.

[0028] The collection box 508 is snapped into the inside of the snap-fit ​​groove 507. The top of the collection box 508 has a groove, and a downwardly inclined baffle is installed on the top of the groove. The upper filter screen 510 is attached to the surface of the collection box 508. The baffle extends downwardly at an inclination, forming a unidirectional still water zone inside the collection box 508 to prevent impurities that have settled into the box from being re-rolled out by the turbulence of the main flow field.

[0029] Reference Figures 8-9 The rotating rod 503 and the upper filter screen 510 are coaxially arranged. The rotating rod 503 passes through both ends of the upper filter screen 510. A guide groove 511 is provided inside the right end of the rotating rod 503. The guide groove 511 is shaped like a flared mouth with its inner diameter gradually increasing to the right. It is used to capture the fluid dynamic pressure in the main flow field and guide it into the internal channel of the rotating rod 503. A through hole 512 is provided inside the guide groove 511. A cross arm 513 is connected to the surface of the rotating rod 503. A flow groove 514 is provided inside the cross arm 513. The flow groove 514 is connected to the inside of the guide groove 511 through the through hole 512.

[0030] The surface of the horizontal arm 513 is provided with a nozzle 515, and a brush 516 is connected to the surface of the horizontal arm 513. The brush 516 and the nozzle 515 are arranged on the same side. The brush 516 is attached to the surface of the upper filter screen 510. The inner diameter of the nozzle 515 is smaller than that of the guide groove 511. Combined with the centrifugal force generated by the rotation of the horizontal arm, a high-speed jet of water is generated at the nozzle 515. With the physical sweeping of the brush 516, the surface of the upper filter screen 510 is cleaned in a coordinated manner and impurities are removed in an instant.

[0031] In this invention, when the charging pile is operating at full load and high power, the internal power devices generate a large amount of heat. At this time, the circulation pump 42 is activated, driving the coolant to continuously pump into the M-shaped water-cooling channel 45 inside the intermediate water-cooling assembly 31 through the outlet pipe 43. The coolant then flows back and forth within the water-cooling channel 45, absorbing the heat transferred from the heat dissipation device 32. During this flow, the water encounters turbulent protrusions 46 distributed at equal intervals, disrupting the originally stable laminar flow state and forming sufficient turbulence. This significantly reduces the thickness of the fluid heat exchange boundary layer, significantly improving heat exchange efficiency. Simultaneously, the coolant flows through the bottom wall of the water-cooling channel 45... When the transverse groove 47 is used, the vortex groove 48 is designed with a sawtooth shape with the tip pointing downstream of the water flow. This induces tiny secondary vortices on the flow channel wall. The micro vortex effect generates continuous shear force, which not only pushes the solid microparticles in the large flow field away from the wall and keeps them in a suspended state, but also destroys the physical adhesion conditions of the initial scale crystals. Combined with the design of the transverse groove 47 with the gradually increasing depth towards the bend of the water-cooled flow channel 45, a strengthened self-flushing effect is achieved at the bend where the flow velocity is prone to sudden changes and dead angles of flow. This greatly reduces the risk of scale and blockage at the bend of the water-cooled flow channel 45 and the back surface of the turbulent protrusion 46, and completes an efficient and scale-proof heat exchange process.

[0032] After heat exchange, the high-temperature coolant, carrying any possible minute impurities or flaking scale, flows into the outlet pipe 43 and enters the inner flow channel 501. Because the inner flow channel 501 has tapered sections at both ends and a constant-diameter section in the middle, the coolant's velocity smoothly decreases while its static pressure increases as it passes through the tapered section and enters the constant-diameter large cavity. This effectively avoids pressure loss caused by sudden changes in the inner diameter due to the turbine 504, and allows for initial interception through the upper filter screen 510 at a low flow rate. Subsequently, the stable liquid flow impacts the turbine 504 mounted on the surface of the rotating rod 503, driving the turbine 504 to rotate. The turbine 504 then drives the rotating rod 503 to rotate stably within the support member 505. The rotation of the rotating rod 503 directly drives the horizontal arm 513 and brush 516 connected to its end to rotate and sweep against the surface of the upper filter screen 510, physically scraping away the adhering material. The scale particles or metal debris on the surface of the upper filter screen 510 are removed. During this rotational cleaning, because the guide groove 511 at the right end of the rotating rod 503 is shaped like a trumpet and faces the main flow field, some coolant is directly introduced into the guide groove 511 and pressed into the flow groove 514 in the cross arm 513 through the through hole 512. Finally, it is sprayed out from the nozzle 515 set on the same side as the brush 516. Since the inner diameter of the nozzle 515 is smaller than that of the guide groove 511, the water flow velocity sprayed from the nozzle 515 is faster. Therefore, the water flow sprayed out at this time can work with the brush 516 to clean the upper filter screen 510, ensuring that the impurities removed by the brush 516 are instantly removed from the surface of the filter screen, maintaining the high flow rate and low pressure loss of the entire system water circuit.

[0033] The debris and impurities that have been removed by the above cleaning process settle and move downwards under the combined action of the coolant and their own gravity. At this time, the solid particles washed down naturally fall into the collection box 508 below. Since a downward-sloping baffle is installed in the groove at the top of the collection box 508, the baffle forms a one-way physical interception barrier, so that the impurity particles that fall into the collection box 508 are in a still water zone and cannot be rolled up again under the disturbance of the local turbulence of the main flow field in the pipeline, thereby avoiding the risk of secondary circulation of impurities and accumulation in the coolant channel.

[0034] At this point, the free solid particles are intercepted by the lower-level filter 502 and the upper-level filter 510, while the clean coolant is discharged back into the water-cooling channel 45 through the connecting pipe 506, starting the next round of efficient heat dissipation cycle.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A power supply structure for a charging pile with excellent heat dissipation performance, comprising a charging pile body (1), wherein a power supply housing (2) is installed inside the charging pile body (1), characterized in that, The power supply housing (2) is equipped with an intermediate water cooling assembly (31), and the charging pile body (1) is equipped with an installation shell (41) on its side wall. The installation shell (41) is equipped with a circulation pump (42), and the circulation pump (42) and the intermediate water cooling assembly (31) are respectively connected to the outlet pipe (43) and the inlet pipe (44). The intermediate water-cooling assembly (31) has a water-cooling channel (45) inside, and turbulent protrusions (46) are installed inside the water-cooling channel (45).

2. The charging pile power supply structure with excellent heat dissipation performance according to claim 1, characterized in that, The upper and lower ends of the intermediate water-cooling assembly (31) are equipped with heat dissipation devices (32), and the side wall of the power supply housing (2) is equipped with a stacked busbar (33).

3. The charging pile power supply structure with excellent heat dissipation performance according to claim 1, characterized in that, The water-cooled flow channel (45) is in the shape of an "M". The two sides of the water-cooled flow channel (45) are connected to the water outlet pipe (43) and the water inlet pipe (44) respectively. The turbulent protrusions (46) are distributed at equal intervals inside the water-cooled flow channel (45).

4. The charging pile power supply structure with excellent heat dissipation performance according to claim 1, characterized in that, The bottom wall of the water-cooled channel (45) is provided with a transverse groove (47). The depth of the transverse groove (47) gradually increases as it bends toward the water-cooled channel (45). The inner wall of the transverse groove (47) is provided with a vortex groove (48). The vortex groove (48) is set in a sawtooth shape, and the tip of the vortex groove (48) points to the downstream of the water flow.

5. The charging pile power supply structure with excellent heat dissipation performance according to claim 1, characterized in that, The outlet pipe (43) has an internal flow channel (501) inside. The internal flow channel (501) includes a constant diameter section and a tapered section at both ends of the constant diameter section. The inner diameter of the constant diameter section is consistent along the axial direction. The inner diameter of the tapered section decreases uniformly from the constant diameter section to the edge of the pipe. A lower-level filter screen (502) is installed on the side of the internal flow channel (501) away from the circulating pump (42). A rotating rod (503) is rotatably connected at the axis of the lower-level filter screen (502). A turbine (504) is installed on the surface of the rotating rod (503). A support member (505) is installed on the inner wall of the internal flow channel (501). The rotating rod (503) is rotatably connected inside the support member (505).

6. The charging pile power supply structure with excellent heat dissipation performance according to claim 5, characterized in that, The surface of the outlet pipe (43) is connected to a connecting pipe (506). The outlet pipe (43) is connected to the inside of the circulating pump (42) through the connecting pipe (506). The inner wall of the connecting pipe (506) is provided with a snap-fit ​​groove (507). A snap-fit ​​ring (509) is snapped into the inside of the snap-fit ​​groove (507). An upper-level filter screen (510) is snapped into the surface of the snap-fit ​​ring (509). The upper-level filter screen (510) is located inside the snap-fit ​​groove (507).

7. The charging pile power supply structure with excellent heat dissipation performance according to claim 6, characterized in that, The collection box (508) is snapped into the inside of the snap-fit ​​groove (507). The top of the collection box (508) has a groove, and a downwardly inclined baffle is installed on the top of the groove. The upper filter screen (510) is attached to the surface of the collection box (508).

8. The charging pile power supply structure with excellent heat dissipation performance according to claim 7, characterized in that, The rotating rod (503) and the upper filter screen (510) are coaxially arranged. The rotating rod (503) passes through both ends of the upper filter screen (510). A guide groove (511) is provided inside the right end of the rotating rod (503). The guide groove (511) is shaped like a flared mouth with its inner diameter gradually increasing to the right. A through hole (512) is provided inside the guide groove (511). A cross arm (513) is connected to the surface of the rotating rod (503). A flow groove (514) is provided inside the cross arm (513). The flow groove (514) is connected to the inside of the guide groove (511) through the through hole (512).

9. The charging pile power supply structure with excellent heat dissipation performance according to claim 8, characterized in that, The surface of the cross arm (513) is provided with a nozzle (515), and a brush (516) is connected to the surface of the cross arm (513). The brush (516) and the nozzle (515) are arranged on the same side, and the brush (516) is attached to the surface of the upper filter screen (510).

10. The charging pile power supply structure with excellent heat dissipation performance according to claim 1, characterized in that, The rear end of the charging pile body (1) is provided with a ventilation opening (61), and the rear end of the charging pile body (1) is rotatably connected with a protective door (62).

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