Electrical structure of European standard 420kW high-power charger

Abstract

The European standard 420kW high-power charger electrical structure comprises a charger cabinet body, and a charging module bin assembly, a charger gun wire booster, a high-voltage electrical inlet wire integration unit, a PDU and control unit integration assembly, a cabinet door air inlet side protection unit and a cabinet door air outlet side protection unit are arranged in the charger cabinet body. The high-voltage electrical inlet wire integration unit comprises a circuit breaker connected with an inlet wire cable, the circuit breaker is connected with an alternating current filter, the output end of the alternating current filter is connected with two alternating current contactors, each alternating current contactor is connected with a respective current transformer, and the output end of each current transformer is connected to the alternating current inlet wire side of the charging module; wherein the circuit breaker and the AC filter are integrated on the vertical mounting plate, and the AC contactor and the current transformer are integrated on the bottom mounting plate. The utility model meets the requirement of heavy-duty anticorrosion grade, and considers the influence of seawater corrosive environment during marine transportation. And the grounding copper bar is arranged outside, thereby facilitating wiring.

Description

Technical Field

[0001] The utility model relates to a European standard charger, in particular to an electrical structure of a European standard 420kW high-power charger. Background Art

[0002] As a high-power DC charger for overseas markets, the European standard 420kW charger needs to comply with IEC and EN electric vehicle charging standards. When in use, the charger needs to be placed outdoors to provide fast charging for electric buses, mining trucks, commercial vehicles, construction machinery, etc.

[0003] 1. Some traditional European standard high-power chargers have high output power, but low cabinet fan efficiency and poor heat dissipation, which will cause serious heating inside the charger, reduce the power of the charging module, and even shorten the life of the components of the charging module.

[0004] 2. The high-voltage incoming lines of some traditional European standard chargers have many electrical components and limited installation space, resulting in a messy layout of high-voltage components and inconvenient installation and maintenance of electrical copper busbars.

[0005] 3. The PDU unit and electrical control unit of some traditional European standard chargers are set separately. There is no way to pre-install them uniformly during production operation, and the production efficiency is low.

[0006] 4. The charging gun cables of some traditional European standard high-power chargers are heavy, and people need to hold the charging gun with both hands during charging, which is laborious and inconvenient.

[0007] 5. Some traditional European standard high-power chargers have poor dust-proof performance because the dust-proof cotton on the air inlet side is made of polyurethane, which affects the life of the charging module. Utility Model Content

[0008] The technical problem to be solved by the utility model is: to provide an electrical structure of a European standard 420kW high-power charger in view of the defects of the prior art.

[0009] The technical solution of the utility model is specifically as follows:

[0010] An electrical structure of a European standard 420kW high-power charger, including a charger cabinet, in which a charging module compartment assembly, a charger gun line booster, a high-voltage electrical incoming line integrated unit, a PDU and control unit integrated assembly, a cabinet door air inlet side protection unit, and a cabinet door air outlet side protection unit are arranged;

[0011] The high-voltage electrical incoming line integrated unit includes: a circuit breaker connected to the incoming cable, the circuit breaker is connected to the AC filter, the output ends of the AC filter are respectively connected to two AC contactors, each AC contactor is connected to its own current transformer, and the output end of each current transformer is connected to the AC incoming line side of the charging module; wherein the circuit breaker and the AC filter are integrated into the vertical mounting plate, and the AC contactor and the current transformer are integrated into the bottom mounting plate.

[0012] A charging module is installed and fixed in the charging module compartment assembly; a sealing plate is arranged around the charging module compartment assembly so that a completely closed cavity is formed inside the sealing plate, and the charging module is arranged in the cavity surrounded by the sealing plate.

[0013] A centrifugal fan is arranged outside the charging module, and the center of the centrifugal fan is aligned with the center of the charging module. The centrifugal fan is arranged on the protective unit on the air outlet side of the cabinet door.

[0014] The incoming cable enters the cabinet from the bottom and is connected to the circuit breaker, and then is connected to the AC filter through the first transfer copper busbar. A surge protector is installed on the side. The AC filter outlet copper busbar is fixed to the bottom mounting plate through an insulator, and enters two AC contactors respectively through the second transfer copper busbar. The current transformer is set on the outlet side of the AC contactor, and the copper busbar on the outlet side of the AC contactor forms a high and low position difference.

[0015] The PDU and control unit integrated assembly includes a PDU unit and a control unit, and all components on the PDU unit and the control unit are integrated into a whole installation plate.

[0016] The air inlet side protection unit of the cabinet door includes a left cabinet door, and a louver structure is arranged on the inner side of the left cabinet door, and the louver structure is composed of a Z-shaped louver arrangement and combination; a double-layer dust-proof cotton structure is respectively installed above and below behind the louver structure, and each double-layer dust-proof cotton structure includes: a first layer of dust-proof cotton limiter, a first layer of dust-proof cotton, a second layer of dust-proof cotton limiter and a second layer of dust-proof cotton, wherein the first layer of dust-proof cotton is installed in the first layer of dust-proof cotton limiter, and the second layer of dust-proof cotton is installed in the second layer of dust-proof cotton limiter; a double-layer dust-proof cotton structure flow channel is welded at the lower end of the double-layer dust-proof structure, the bottom of the double-layer dust-proof cotton structure flow channel is inclined, a waist hole is arranged in the louver structure, and the bottom of the double-layer dust-proof cotton structure flow channel is connected with the waist hole.

[0017] The first layer of dustproof cotton limiting piece and the second layer of dustproof cotton limiting piece are both sheet metal, and the two are fixed as a whole by welding, and a dust collection groove is arranged between the first layer of dustproof cotton and the second layer of dustproof cotton.

[0018] The double-layer dustproof cotton structure is fixed to the shutter structure by buckles.

[0019] The double-layer dust-proof cotton structure flow channel is arranged at the bottom of the first layer of dust-proof cotton limiter and the second layer of dust-proof cotton limiter, and drainage holes are opened on the bottom sheet metal of the first layer of dust-proof cotton limiter and the second layer of dust-proof cotton limiter, and the double-layer dust-proof cotton structure flow channel is arranged below the drainage hole, and the double-layer dust-proof cotton structure flow channel is welded to the louver structure, and the double-layer dust-proof cotton structure flow channel and the louver structure are welded as one.

[0020] Each Z-shaped louver comprises a Z-shaped louver body, which is formed into a Z shape by a first louver, a second louver and a third louver, wherein both sides of the second louver are provided with ear plate folds, the ear plate folds are arranged perpendicular to the second louver, and the ear plate folds on each side are fixed to the protective frame on the corresponding side by rivets;

[0021] The end of the third blade in each Z-shaped louver body is provided with a bending edge, an angle is provided between the bending edge and the third blade, and a through hole is provided on the bending edge, and the first blade in another Z-shaped louver is inserted into the through hole.

[0022] The beneficial effects of the utility model are as follows: the overall anti-corrosion level of the European standard 420kW charger cabinet meets the requirements of heavy anti-corrosion level, taking into account the impact of seawater corrosive environment during marine transportation. And a grounding copper bus is set outside to facilitate wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the front view of the utility model;

[0024] Figure 2 It is a rear view of the utility model;

[0025] Figure 3 It is a top view of the utility model;

[0026] Figure 4 It is the electrical schematic diagram of the high-voltage electrical incoming line integrated unit;

[0027] Figure 5 This is the main view of the high-voltage electrical incoming line integrated unit;

[0028] Figure 6 It is a side view of the high-voltage electrical incoming line integrated unit;

[0029] Figure 7 It is a top view of the high-voltage electrical incoming line integrated unit;

[0030] Figure 8 It is a structural diagram of the integrated components of the PDU and control unit;

[0031] Fig. 9 It is a side view of the protection unit on the air inlet side of the cabinet door;

[0032] Fig.10It is a cross-sectional view of the protection unit on the air inlet side of the cabinet door;

[0033] Fig.11 A side view of the louver structure. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, an electrical structure of a European standard 420kW high-power charger includes a charger cabinet 1, in which a charging module compartment assembly 2, a charger gun line booster 3, a high-voltage electrical incoming line integrated unit 4, a PDU and control unit integrated assembly 5, a cabinet door air inlet side protection unit 6 and a cabinet door air outlet side protection unit 7 are arranged.

[0036] The charger cabinet 1 consists of a cabinet frame, a front door, and left and right side doors. It is an important component of the charging pile, providing internal component installation and fixation for the charging pile and external protection against rain, snow, and dust. The cabinet frame of the charger cabinet 1 is welded as a whole with 2.0 thick hot-dip galvanized plates, and the surface is sprayed with two coats of plastic powder. The length, depth, and height dimensions of the charger are: 850*950*1950mm; an 8mm thick copper busbar is welded on the back of the cabinet, and a 2-M8 thread is set to facilitate external grounding for customers. It can achieve high corrosion and salt spray resistance, effectively extend the outdoor service life of the charger, and facilitate customers to ground the outside of the cabinet to ensure personal safety.

[0037] The charging module compartment assembly 2 is the core component of the charger, and it has the function of converting electric energy. A charging module is installed and fixed in the charging module compartment assembly 2. A partition plate 21 is arranged around the charging module compartment assembly 2, so that a completely closed cavity is formed inside the partition plate 21, reducing the module gap. A charging module 22 is arranged in the cavity surrounded by the partition plate 21. The charging module 22 adopts a 30kW charging module, which is placed vertically and arranged in 3 rows and 5 columns. The gap between adjacent charging modules 22 is 2mm, and the rest of the part can be formed into a completely closed cavity with a protective sealing plate.

[0038] Furthermore, a centrifugal fan 71 is provided outside the charging module 22, and the center of the centrifugal fan 71 is aligned with the center of the charging module, which can effectively improve the working efficiency of the centrifugal fan, increase the heat dissipation inside the charger, and increase the service life of the charging module. The centrifugal fan 71 is provided on the air outlet side protection unit 7 of the cabinet door.

[0039] Furthermore, a blocking partition 23 is provided at the bottom of the charging module compartment assembly 2, and the blocking partition prevents moving objects from entering the interior of the charging module.

[0040] The charger gun line booster 3 is a suspension balancer with a customized spring and self-locking device inside. It mainly solves the problem that the gun line is too heavy when people lift the charging gun, improves the comfort of people during the charging process, and increases the convenience of charging operation. The charger gun line booster 3 is located at the top of both sides of the charger. The booster is fixed to the outside of the cabinet with 4 M8 screws. A protective shell cover 31 is set on the outside, and the A and B gun logos are silk-screened respectively. The protective shell cover 31 and the cabinet are sealed with sealant all around. The lower part of the protective shell cover 31 is provided with a guide wheel 32 and a gun line locking piece 33, which solves the problem that the gun line is too heavy when people lift the charging gun during charging, and improves the comfort of people during charging.

[0041] like Figure 4 , Figure 5 As shown, the high-voltage electrical incoming line integrated unit 4 is composed of a circuit breaker 41, an AC filter 42, an AC contactor 43, a current transformer 44, a copper bus, a surge protector, etc., which provides AC input and metering functions for the charger. Its electrical principle is as follows Figure 4 As shown, the incoming cable is connected to the AC filter 42 through the circuit breaker 41, and the output ends of the AC filter 42 are respectively connected to two AC contactors 43, each AC contactor 43 is connected to its own current transformer 44, and the output end of each current transformer 44 is connected to the AC incoming side 45 of the charging module. The above electrical principles are prior art and will not be repeated here.

[0042] In the present utility model, the components of the high-voltage electrical incoming line integrated unit 4 are divided into two parts: ① The circuit breaker 41 and the AC filter 42 are integrated into the vertical mounting plate 46. The specific scheme is: the incoming cable is connected to the circuit breaker 41 after entering the cabinet from the bottom, and then connected to the AC filter 42 through the first transfer copper bar 47, and a surge protector is set on the side. ② The AC contactor 43 and the current transformer 44 are integrated into the bottom mounting plate 48. The specific scheme is: the AC filter 42 outlet copper bar is fixed to the bottom mounting plate 48 through an insulator, and enters the two AC contactors 43 respectively through the second transfer copper bar 49. The current transformer 44 is set on the outlet side of the AC contactor 43, and the copper bar on the outlet side of the AC contactor 43 forms a high and low position difference, which is convenient for connecting the AC line of the charging module. The two integrated mounting plates can realize offline modular pre-installation respectively, and then be installed in the charging cabinet respectively, which improves production efficiency, facilitates workers' operation, and facilitates on-site after-sales maintenance, disassembly and replacement of components.

[0043] like Figure 8As shown, the PDU and control unit integrated component 5 includes a PDU unit 51 and a control unit 52, which provide control and high-voltage DC output functions for the charger. The utility model integrates all components on the PDU unit 51 and the control unit 52 into a whole mounting plate, with the PDU unit 51 on the upper part and the control unit 52 and the AC and DC meters on the lower part. They can be pre-installed offline and then installed as a whole, which is convenient for production operations. In this way, the upper part of the PDU unit is connected to the DC line of the charging module, and the lower part is connected to the charging gun line, and a gun line locking structure is provided inside to prevent it from being pulled off during the charging process. A protective partition is provided on the outside of the PDU and control unit integrated component.

[0044] like Fig. 9 , Fig.10 , Fig.11 As shown, the cabinet door air inlet side protection unit 6 is composed of a left cabinet door 61, an S-shaped waterproof shutter, filter cotton, etc., which plays a role in heat dissipation and IP protection for the charging module inside the charger.

[0045] The cabinet door air inlet side protection unit 6 comprises a left cabinet door 61 , and a shutter structure 62 is arranged on the inner side of the left cabinet door 61 . The shutter structure 62 is composed of an arrangement and combination of Z-shaped shutter blades 63 .

[0046] A double-layer dust-proof cotton structure 611 is respectively installed above and below the back of the louver structure 62, and each double-layer dust-proof cotton structure 611 includes: a first-layer dust-proof cotton limiter 64, a first-layer dust-proof cotton 65, a second-layer dust-proof cotton limiter 67, and a second-layer dust-proof cotton 68, wherein the first-layer dust-proof cotton 65 is installed in the first-layer dust-proof cotton limiter 64, and the second-layer dust-proof cotton 68 is installed in the second-layer dust-proof cotton limiter 67, and the first-layer dust-proof cotton limiter 64 and the second-layer dust-proof cotton limiter 67 are both sheet metal, and the two are fixed as a whole by welding, and there is a gap between the first-layer dust-proof cotton 65 and the second-layer dust-proof cotton 68, namely, a dust falling groove 66, to achieve the purpose of dustproof and waterproof.

[0047] It should be noted that the first layer dustproof cotton limiter 64 and the second layer dustproof cotton limiter 67 are formed of a groove structure by sheet metal, including upper, lower, left and right limits, so that the dustproof cotton can be located in the dustproof limiter.

[0048] Furthermore, the double-layer dust-proof cotton structure 611 is fixed to the louver structure 62 by means of a buckle 612 , thereby achieving the purpose of fixing the double-layer dust-proof cotton structure 11 .

[0049] A double-layer dustproof cotton structure flow channel 69 is welded at the lower end of the double-layer dustproof structure 611. The bottom of the double-layer dustproof cotton structure flow channel 69 is inclined. A waist hole is set in the louver structure 62. The bottom of the double-layer dustproof cotton structure flow channel 69 is connected to the waist hole.

[0050] Better, the double-layer dust-proof cotton structure flow channel 69 is arranged at the bottom of the first layer of dust-proof cotton limiter 64 and the second layer of dust-proof cotton limiter 67, and drainage holes are opened on the bottom sheet metal of the first layer of dust-proof cotton limiter 64 and the second layer of dust-proof cotton limiter 67, and the double-layer dust-proof cotton structure flow channel 69 is arranged below the drainage holes, and the double-layer dust-proof cotton structure flow channel 69 is welded to the louver structure 62, and the double-layer dust-proof cotton structure flow channel 69 and the louver structure 62 are welded as one, and a waist hole is opened on the louver structure 62 at the connection between the two, so that the water in the double-layer dust-proof cotton structure flow channel 69 can be discharged into the louver structure 62, and then discharged to the outside of the cabinet.

[0051] Furthermore, a louver structure 62 is installed on the inner side of the cabinet door. The louver structure 62 is composed of an arrangement and combination of Z-shaped louvers 63. There is a degree of overlap between the Z-shaped louvers 63. The two Z-shaped louvers 63 form an inner buckle structure, which can prevent larger dust and impurities from entering the interior of the charging pile, and can also achieve the purpose of waterproofing. The louver structure 62 is fixed to the cabinet door by bolting with bolts and nuts.

[0052] like Figure 5 As shown, each Z-type louver 63 includes a Z-type louver body, which is composed of a first blade 631, a second blade 632 and a third blade 633 to form a Z shape, wherein ear plate folds 635 are provided on both sides of the second blade 632, the ear plate folds 635 are arranged perpendicular to the second blade 632, and the ear plate folds 635 on each side are fixed to the protective frame on the corresponding side by rivets 636.

[0053] Furthermore, a bending edge 634 is provided at the end of the third blade 633 in each Z-shaped louver body, and an angle of 105° is provided between the bending edge 634 and the third blade 633, and a through hole is provided on the bending edge 634, and the first blade in another Z-shaped louver is inserted into the through hole, so that two adjacent Z-shaped louvers overlap with each other.

[0054] Preferably, the overlap between the third blade of the preceding Z-shaped louver and the first blade of the succeeding Z-shaped louver is 15 mm.

[0055] Thus, a Z-shaped louver structure of the charging pile is formed: each Z-shaped louver blade 63 is arranged in combination, and there is overlap between the adjacent Z-shaped louver blades 63 after the arrangement and combination, ensuring that the overlap between the upper and lower assembled Z-shaped louver blades 63 is 15mm, and the ear plate folding edges 635 on both sides of each Z-shaped louver blade 63 are assembled with the protective frame and fixed by rivets 636, and two rivets 636 on one side are fixed to ensure fastening and structural strength. In the thus formed Z-shaped louver structure, each two Z-shaped louver blades 63 form an inner buckle, and from the outside of the louver, the other side of the louver cannot be directly seen. The inner buckle structure of the louver blade prevents impurities, dust and water in the outside from directly entering the interior of the charging pile; at the same time, light cannot directly penetrate into the interior of the charging pile, avoiding direct sunlight on the electronic components and charging modules inside the charging pile, and avoiding failures of the electronic components and charging modules.

[0056] The operating environment of high-power charging piles is relatively harsh, and the particle sizes of dust and impurities are irregular and of varying sizes, so it is best to use a graded approach for protection. For charging piles, the protective structures of charging piles are mostly assembled on the cabinet doors. First, the first layer of protection is to design a hexagonal hole structure on the left cabinet door 61 to prevent large particles of dust and impurities from entering the interior of the charging pile. Secondly, the second layer of protection is to design a louver structure 62 on the inside of the left cabinet door 61. The louver structure 62 is used as the second layer of protection because the Z-shaped louver blades 63 of the louver structure 62 overlap each other, and the two Z-shaped louvers form an inward buckle structure, which can prevent larger dust and impurities from entering the interior of the charging pile. Finally, the third layer of protection is to design a double-layer dustproof cotton structure on the rear side of the louver structure 62 to prevent small dust, impurities and dust from entering the interior of the charging pile, so as to avoid a great impact on the charging module and electronic components inside the charging pile, and affect the performance of these components.

[0057] Regarding the waterproof performance of the high-power charging pile, first, a flow channel structure is added to the louver structure 62. Part of the water that comes in through the hexagonal holes of the cabinet door will be blocked on the outside due to the inner buckle structure of the louver structure 62. The water between the hexagonal holes of the cabinet door and the louver structure will flow to the bottom along the louver, flow out through the flow channel structure of the louver structure 62 itself, and then flow out through the hexagonal holes at the bottom of the cabinet door. Second, a double-layer dust-proof cotton structure flow channel 69 is provided at the bottom of the double-layer dust-proof cotton structure 611. Part of the water that passes through the louver structure 62 will be blocked on the outside due to the first layer of dust-proof cotton 65. This part of the water will flow into the double-layer dust-proof cotton structure flow channel 69 through the hole at the bottom of the first layer of dust-proof cotton limiter 64, and then be discharged into the louver structure, and flow out through the flow channel at the bottom of the louver structure. A small amount of water that passes through the first layer of dustproof cotton 65 is blocked on the outside by the second layer of dustproof cotton 68. This part of water will flow through the gap between the double layers of dustproof cotton (dust-falling groove 66) into the double-layer dustproof cotton structure flow channel 69, be discharged into the louver structure 62, and flow out through the flow channel at the bottom of the louver structure. Finally, a very small amount of water can pass through the second layer of dustproof cotton 68, and the water that passes through the second layer of dustproof cotton 68 flows into the double-layer dustproof cotton structure flow channel 69, be discharged into the louver structure 62, and flow out through the flow channel at the bottom of the louver structure 62.

[0058] The cabinet door air outlet side protection unit 7 includes a right cabinet door 72, on which a centrifugal fan 71 is arranged, which plays a role in heat dissipation and IP protection for the charging module inside the charger. Among them, the cabinet door air outlet side protection unit 7 is provided with four 280-type centrifugal fans 71, and is equipped with an air guide ring. An air outlet is provided on the right cabinet door 72. The air outlet is an S11 hexagonal hole, and a 10-mesh dust-proof steel mesh is welded inside. In addition, polyurethane dust-proof cotton is arranged to effectively increase its protection performance. In order to ensure the elimination of turbulence, the four 280-type centrifugal fans are completely isolated and closed. Each centrifugal fan adopts a 60° inclined guide air duct, which can effectively improve the dust filtering and waterproof performance on the air outlet side and increase the service life of the charging module. It can effectively improve the heat dissipation of the charging module and increase the service life of the charging module.

[0059] The overall anti-corrosion level of the European standard 420kW charger cabinet meets the requirements of heavy anti-corrosion level, taking into account the impact of seawater corrosive environment during sea transportation. And the grounding copper bus is set outside for easy wiring.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A European standard 420kW high-power charger electrical structure, characterized by: The charger cabinet (1) comprises a charging module compartment assembly (2), a charging machine gun line booster (3), a high-voltage electrical incoming line integrated unit (4), a PDU and control unit integrated assembly (5), a cabinet door air inlet side protection unit (6) and a cabinet door air outlet side protection unit (7) arranged in the charging cabinet (1); The high-voltage electrical incoming line integrated unit (4) comprises: a circuit breaker (41) connected to an incoming line cable, the circuit breaker (41) connected to an AC filter (42), the output end of the AC filter (42) respectively connected to two AC contactors (43), each AC contactor (43) connected to its own current transformer (44), and the output end of each current transformer (44) connected to an AC incoming line side (45) of a charging module; wherein the circuit breaker (41) and the AC filter (42) are integrated into a vertical mounting plate (46), and the AC contactor (43) and the current transformer (44) are integrated into a bottom mounting plate (48).

2. The electrical structure of a European standard 420kW high-power charger according to claim 1 is characterized by: A charging module is fixedly installed in the charging module compartment assembly (2); a sealing plate (21) is arranged around the charging module compartment assembly (2), so that a completely closed cavity is formed inside the sealing plate (21); and a charging module (22) is arranged in the cavity surrounded by the sealing plate (21).

3. The electrical structure of a European standard 420kW high-power charger according to claim 2 is characterized in that: A centrifugal fan (71) is arranged outside the charging module (22), and the center of the centrifugal fan (71) is aligned with the center of the charging module. The centrifugal fan (71) is arranged on the air outlet side protection unit (7) of the cabinet door.

4. The electrical structure of a European standard 420kW high-power charger according to claim 1 is characterized in that: The incoming cable enters from the bottom of the cabinet and is connected to the circuit breaker (41), and then connected to the AC filter (42) through the first transfer copper bar (47), and a surge protector is arranged on the side; The outlet copper bar of the AC filter (42) is fixed to the bottom mounting plate (48) via an insulator, and respectively enters two AC contactors (43) through a second transfer copper bar (49). The current transformer (44) is arranged on the outlet side of the AC contactor (43), and the copper bar on the outlet side of the AC contactor (43) forms a high and low position difference.

5. The electrical structure of a European standard 420kW high-power charger according to claim 1 is characterized by: The PDU and control unit integrated assembly (5) comprises a PDU unit (51) and a control unit (52), and all components on the PDU unit (51) and the control unit (52) are integrated into a whole installation board.

6. The electrical structure of a European standard 420kW high-power charger according to claim 1 is characterized by: The cabinet door air inlet side protection unit (6) comprises a left cabinet door (61), a shutter structure (62) is arranged on the inner side of the left cabinet door (61), and the shutter structure (62) is composed of a Z-shaped shutter blade (63) arranged in combination; a double-layer dustproof cotton structure (611) is respectively arranged above and below the back of the shutter structure (62), and each double-layer dustproof cotton structure (611) comprises: a first layer dustproof cotton stopper (64), a first layer dustproof cotton (65), and a second layer dustproof cotton stopper (67 ) and a second layer of dust-proof cotton (68), wherein the first layer of dust-proof cotton (65) is mounted in the first layer of dust-proof cotton limiting piece (64), and the second layer of dust-proof cotton (68) is mounted in the second layer of dust-proof cotton limiting piece (67); a double-layer dust-proof cotton structure flow channel (69) is welded at the lower end of the double-layer dust-proof cotton structure (611), the bottom of the double-layer dust-proof cotton structure flow channel (69) is inclined, a waist hole is provided in the louver structure (62), and the bottom of the double-layer dust-proof cotton structure flow channel (69) is connected to the waist hole.

7. The electrical structure of a European standard 420kW high-power charger according to claim 6, characterized in that: The first layer of dustproof cotton limiting piece (64) and the second layer of dustproof cotton limiting piece (67) are both made of sheet metal, and the two are fixed together by welding, and a dust collection groove (66) is provided between the first layer of dustproof cotton (65) and the second layer of dustproof cotton (68).

8. The electrical structure of a European standard 420kW high-power charger according to claim 6 is characterized by: The double-layer dustproof cotton structure (611) is fixed to the shutter structure (62) via a buckle (612).

9. The electrical structure of a European standard 420kW high-power charger according to claim 6, characterized in that: The double-layer dust-proof cotton structure flow channel (69) is arranged at the bottom of the first-layer dust-proof cotton limiter (64) and the second-layer dust-proof cotton limiter (67); a drainage hole is opened on the sheet metal at the bottom of the first-layer dust-proof cotton limiter (64) and the second-layer dust-proof cotton limiter (67); the double-layer dust-proof cotton structure flow channel (69) is arranged below the drainage hole; the double-layer dust-proof cotton structure flow channel (69) is welded to the louver structure (62); and the double-layer dust-proof cotton structure flow channel (69) and the louver structure (62) are welded together.

10. The electrical structure of a European standard 420kW high-power charger according to claim 6, characterized in that: Each Z-shaped louver (63) comprises a Z-shaped louver body, wherein the Z-shaped louver body is composed of a first blade (631), a second blade (632) and a third blade (633) to form a Z shape, wherein both sides of the second blade (632) are provided with ear plate folding edges (635), the ear plate folding edges (635) are arranged perpendicular to the second blade (632), and the ear plate folding edges (635) on each side are fixed to the protective frame on the corresponding side by rivets (636); A bending edge (634) is provided at the end of the third blade (633) in each Z-shaped louver body, an angle is provided between the bending edge (634) and the third blade (633), and a through hole is provided on the bending edge (634), and the first blade in another Z-shaped louver is inserted into the through hole.

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