Direct-current quick charge converter for new energy automobile

Abstract

A new energy automobile direct current fast charging converter safe and convenient to use is characterized in that a high-voltage input end and a low-voltage input end are arranged on the bottom face of a shell base, the high-voltage input end is located on the front side of the shell base, a first high-voltage switching column and a second high-voltage switching column are arranged in the high-voltage input end, and the low-voltage input end is located on the rear side of the shell base; a first control switching column, a second control switching column and a first end of a grounding binding post are arranged in the low-voltage input end; the shell cover is installed on the shell base, an output end is arranged on the top face of the shell cover and located on the rear side of the shell cover, and a first high-voltage binding post, a second high-voltage binding post, a first control binding post, a second control binding post and a second end of the grounding binding post are arranged in the output end. The product is waterproof and moisture-proof due to ultrasonic welding sealing, so that the insulating capacity is improved; a thermal over-current protection function is provided, so that the product is safer; a red copper silver-plated binding post is adopted to reduce large current impedance and prevent heating.

Description

Technical Field

[0001] The utility model relates to a direct current fast charging converter for new energy vehicles. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional automotive fuels as a power source, integrate advanced technologies in vehicle power control and drive, and have advanced technical principles, new technologies, and new structures. New energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, and other new energy vehicles. Most of the current new energy vehicles are pure electric. Pure electric vehicles are vehicles that use a single battery as a power source for energy storage. They use batteries as a power source for energy storage, and provide electricity to the motor through the battery to drive the motor to run, thereby driving the vehicle. Therefore, sockets are essential for the charging process of pure electric vehicles, and the vehicle needs to be charged regularly.

[0003] The commonly used charging methods for existing new energy vehicles are charging pile charging and portable charger charging. Charging with a charging pile needs to be done at a designated place, while charging with a portable charger can be done at any location. Regardless of the method, a dedicated charging gun is required for charging. ZL202321195835.8 discloses a charging gun adapter for converting electrical signals between a charging gun and a charging gun socket. The charging gun adapter includes a shell and a connecting terminal. The two ends of the shell are respectively provided with a first port for connecting the charging gun and a second port for connecting the charging gun socket. The connecting terminal includes a first end and a second end. The first end and the second end are integrally formed, and a signal pin for transmitting a control signal is convexly provided at the front end of the first end. The first end and the signal pin are both inserted into the first port, and the second end is fixed in the second port.

[0004] The charging gun adapter adopts an integrated connection terminal design in structure. The low-voltage end and the high-voltage end are directly connected and close to each other. Since the voltage and current of new energy vehicles are relatively large, when a lot of heat is generated during long-term charging, the outer shell is very easy to deform, resulting in breakdown between the terminals, causing serious safety accidents. Summary of the invention

[0005] The utility model aims to solve the safety problem caused by the heat generated by the charging gun converter of the new energy vehicle during the charging process.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a new energy vehicle DC fast charging converter, comprising: a shell base, the bottom surface of the shell base is provided with a high-voltage input terminal and a low-voltage input terminal, the high-voltage input terminal is located on the front side of the shell base, and the high-voltage input terminal is provided with a first high-voltage transfer column and a second high-voltage transfer column, the low-voltage input terminal is located on the rear side of the shell base, and the low-voltage input terminal is provided with a first control transfer column, a second control transfer column and a first end of a grounding terminal; a shell cover installed on the shell base, and the top surface of the shell cover is provided with There is an output end, the output end is located on the rear side of the outer shell cover, and the output end is provided with a first high-voltage terminal, a second high-voltage terminal, a first control terminal, a second control terminal and a second end of the grounding terminal; a first connecting aluminum plate and a second connecting aluminum plate are arranged between the outer shell base and the outer shell cover, and the first connecting aluminum plate and the second connecting aluminum plate are provided with positioning pieces on the outside so that the second connecting aluminum plate is spaced and partially staggered and stacked on the top of the first connecting aluminum plate, the lower end of the first high-voltage terminal extends downward and is connected to the rear end of the first connecting aluminum plate, and the lower end of the second high-voltage terminal The end of the first high-voltage transfer column extends downward and is connected to the rear end of the second connecting aluminum plate, the upper end of the first high-voltage transfer column extends upward and is connected to the front end of the first connecting aluminum plate, the upper end of the second high-voltage transfer column extends upward and is connected to the front end of the second connecting aluminum plate, the corresponding positions of the first connecting aluminum plate and the second connecting aluminum plate are provided with openings, a control circuit board is installed on the housing base, the control module is located below the first connecting aluminum plate, the control circuit board has a first connecting hole, a second connecting hole, a third connecting hole, and a fourth connecting hole, the lower end of the first control terminal passes through the opening and is inserted into the first In the connecting hole, the lower end of the second control terminal is inserted into the second connecting hole through the opening, the upper end of the first control adapter terminal is inserted into the third connecting hole, and the upper end of the second control terminal is inserted into the fourth connecting hole, wherein the first control terminal and the first control adapter terminal are interconnected through a first circuit, the first circuit includes a first temperature-controlled switch and a second temperature-controlled switch connected in series, the second temperature-controlled switch is connected in parallel with a chip resistor, the operating temperature of the first temperature-controlled switch is greater than the operating temperature of the second temperature-controlled switch, and the second control terminal and the second control terminal are connected through a second circuit.

[0007] Preferably, the first connection hole and the third connection hole are located on one side of the control circuit board, the second connection hole and the fourth connection hole are located on the other side of the control circuit board, and the grounding terminal passes through the gap between the two sides of the control circuit board.

[0008] Preferably, the control circuit board has a mounting hole, and screws pass through the mounting hole to fix the control circuit board to the housing base.

[0009] Preferably, screws are used to fix the first connecting aluminum plate, the second connecting aluminum plate, and the positioning plate to the housing base.

[0010] Preferably, claw springs are respectively provided in the first connecting hole, the second connecting hole, the third connecting hole and the fourth connecting hole, the first control terminal, the first control adapter terminal, the second control terminal and the second control terminal are respectively connected to the corresponding claw springs, and heat transfer cotton is provided between the control module and the first connecting aluminum plate.

[0011] Preferably, the top ends of the first high-voltage terminal and the second high-voltage terminal are respectively formed of a clamp-like structure by milling grooves through a silver-plated copper column, the outer part of the clamp-like structure of the first high-voltage terminal and the second high-voltage terminal is sleeved with a clamping ring, the inner part of the clamp-like structure of the first high-voltage terminal and the second high-voltage terminal is provided with a core column, and the ends of the core columns of the clamp-like structure of the first high-voltage terminal and the second high-voltage terminal are installed with insulating terminal caps.

[0012] Preferably, the diameters of the first high-voltage adapter column and the second high-voltage adapter column are larger than the diameters of the first control adapter column, the second control adapter column and the grounding terminal, and the diameters of the first high-voltage terminal and the second high-voltage terminal are larger than the diameters of the first control terminal, the second control terminal and the grounding terminal.

[0013] Preferably, the first high-voltage adapter post, the second high-voltage adapter post, the first control adapter post, the second control adapter post, the grounding terminal, the first high-voltage terminal, the second high-voltage terminal, the first control terminal, and the second control terminal are respectively sleeved with rubber rings, and a rubber sleeve is sleeved between the first end and the second end of the grounding terminal.

[0014] Preferably, a transmission pressure rod and a spring are provided between the shell base and the shell cover, and the transmission pressure rod elastically extends out of the top surface of the shell cover.

[0015] Preferably, a sealing ring is provided at the edge of the shell base, and the shell base and the shell cover are connected by a self-locking connecting rod and then sealed by ultrasonic welding.

[0016] Due to the adoption of the above technical scheme, the advantages of the new energy vehicle DC fast charging converter of the utility model include: the second connecting aluminum plate is stacked on top of the first connecting aluminum plate, and a large amount of heat generated when the high-voltage terminal and the high-voltage adapter are subjected to high voltage can be dissipated through the large area of ​​the aluminum plate, and has a very strong heat dissipation performance; the control circuit board is provided with a first temperature control switch and a second temperature control switch. If the charging temperature reaches the operating temperature of the second temperature control switch, the second temperature control switch will be disconnected, so that the charging current of the charging pile is reduced. If the temperature further reaches the operating temperature of the first temperature control switch, the first temperature control switch will be further disconnected, so that the control signal will be disconnected from the charging pile, and the charging process will stop automatically. The circuit design of thermal overcurrent protection has high safety, which ensures the safety of charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 A three-dimensional DC fast charging converter for new energy vehicles according to the utility model Figure 1 ;

[0018] Attached Figure 2 A three-dimensional DC fast charging converter for new energy vehicles according to the utility model Figure 2 ;

[0019] Attached Figure 3 The three-dimensional disassembly of the DC fast charging converter for new energy vehicles according to the utility model Figure 1 ;

[0020] Attached Figure 4 The three-dimensional disassembly of the DC fast charging converter for new energy vehicles according to the utility model Figure 2 ;

[0021] Attached Figure 5 A three-dimensional diagram of a control circuit board of a DC fast charging converter for a new energy vehicle according to the utility model;

[0022] Attached Figure 6 This is a circuit diagram of a control circuit board of a DC fast charging converter for new energy vehicles according to the utility model;

[0023] Attached Figure 7 The figure is a circuit diagram of a control circuit board of a DC fast charging converter for new energy vehicles according to the utility model. Implementation

[0024] Hereinafter, the terms used in the specification will be briefly described, and the embodiments will be described in detail. All terms including descriptive terms or technical terms used herein should be interpreted as having meanings understood by those of ordinary skill in the art. However, these terms may have different meanings according to the intentions of those of ordinary skill in the art, precedents, or the emergence of new technologies.

[0025] In addition, some terms can be selected by the applicant, and in this case, the meaning of the selected terms will be described in detail in the detailed description of the embodiment. Therefore, the terms used herein must be defined based on the meaning of the terms together with the description in the entire specification. In addition, when a component "includes" or "contains" an element, unless there is a specific description to the contrary, the component may also include other elements without excluding other elements. In the following description, terms such as "component" and "module" indicate a unit for processing at least one function or operation, wherein the unit and module can be implemented as hardware or software or by combining hardware and software and implemented.

[0026] Embodiments will now be described more fully with reference to the accompanying drawings. However, embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the embodiments to those of ordinary skill in the art. In the following description, well-known functions or structures are not described in detail because they will obscure the embodiments with unnecessary details, and throughout the specification, the same reference numerals in the drawings represent the same or similar elements.

[0027] Attached Figure 1 A three-dimensional DC fast charging converter for new energy vehicles according to the utility model Figure 1 , attached Figure 2 A three-dimensional DC fast charging converter for new energy vehicles according to the utility model Figure 2 . This is an American standard and Tesla DC fast charging converter, with a current of up to 200A and a voltage of 500V. It includes a shell base 1 and a shell cover 2 installed on the shell base 1. The overall plastic material is flame-retardant, high-voltage resistant and other engineering plastics to meet the US UL standard to improve the safety factor. A sealing ring 18 is provided on the edge of the shell base 1. The shell base 1 and the shell cover 2 are connected by a self-locking connecting rod 19. The overall assembly is sealed by ultrasonic welding. The product is assembled by self-locking (connecting rod), which improves the ability to fall and break. Ultrasonic welding sealing makes it waterproof and moisture-proof and improves insulation ability; a transmission pressure rod 6 and a spring 7 are provided between the shell base 1 and the shell cover 2. The transmission pressure rod 6 elastically extends out of the top surface of the shell cover 2, and a sealing ring 8 is provided around the installation position of the transmission pressure rod 6 to ensure the sealing of the internal circuit.

[0028] Attached Figure 3 The three-dimensional disassembly of the DC fast charging converter for new energy vehicles according to the utility model Figure 1 , attached Figure 4 The three-dimensional disassembly of the DC fast charging converter for new energy vehicles according to the utility model Figure 2The bottom surface of the housing base 1 is provided with a high-voltage input terminal 11 and a low-voltage input terminal 12. The high-voltage input terminal 11 is located at the front side of the housing base 1. The high-voltage input terminal 11 is provided with a first high-voltage transfer column 13 and a second high-voltage transfer column 14. The low-voltage input terminal 12 is located at the rear side of the housing base 1. The low-voltage input terminal 12 is provided with a first end of a first control transfer column 15, a second control transfer column 16 and a grounding terminal 17. The diameters of the first high-voltage transfer column 13 and the second high-voltage transfer column 14 are larger than the diameters of the first control transfer column 15, the second control transfer column 16 and the grounding terminal 17. The first high-voltage transfer column 13, the second high-voltage transfer column 14, the first control transfer column 15, the second control transfer column 16 and the grounding terminal 17 are respectively sleeved with rubber rings 4.

[0029] The top surface of the outer shell cover 2 is provided with an output terminal 21, which is located at the rear side of the outer shell cover 2. The output terminal 21 is provided with a first high-voltage terminal 22, a second high-voltage terminal 23, a first control terminal 24, a second control terminal 25 and the second end of the grounding terminal 17; the diameters of the first high-voltage terminal 22 and the second high-voltage terminal 23 are larger than the diameters of the first control terminal 24, the second control terminal 25 and the grounding terminal 17. A rubber ring 4 is sleeved on the first high-voltage terminal 22, the second high-voltage terminal 23, the first control terminal 24 and the second control terminal 25, respectively, and a rubber sleeve 5 is sleeved between the first end and the second end of the grounding terminal 17. The tops of the first high-voltage terminal 22 and the second high-voltage terminal 23 are respectively formed into a clip-like structure by milling grooves with red copper silver-plated columns. The red copper silver-plated terminal is used to reduce the impedance of large current and prevent heating. The terminal adopts a milling groove to contact with the electric vehicle charging socket in a clip-like manner to reduce the contact resistance and prevent overheating. The clamping structure of the first high-voltage terminal 22 and the second high-voltage terminal 23 is provided with a clamping ring 26 on the outside, and the clamping structure of the first high-voltage terminal 22 and the second high-voltage terminal 23 is provided with a core 27 on the inside. The ends of the core 27 of the clamping structure of the first high-voltage terminal 22 and the second high-voltage terminal 23 are provided with insulating terminal caps 28.

[0030] A first connecting aluminum plate 31 and a second connecting aluminum plate 32 are provided between the housing base 1 and the housing cover 2. Positioning plates 33 are provided on the outside of the first connecting aluminum plate 31 and the second connecting aluminum plate 32 so that the second connecting aluminum plate 32 is stacked on top of the first connecting aluminum plate 31 in an interval and partially staggered manner. Screws 10 fix the first connecting aluminum plate 31, the second connecting aluminum plate 32 and the positioning plates 33 on the housing base 1 from top to bottom. The lower end of the first high-voltage terminal 22 extends downward to connect to the rear end of the first connecting aluminum plate 31, the lower end of the second high-voltage terminal 23 extends downward to connect to the rear end of the second connecting aluminum plate 32, the upper end of the first high-voltage transfer column 13 extends upward to connect to the front end of the first connecting aluminum plate 31, the upper end of the second high-voltage transfer column 14 extends upward to connect to the front end of the second connecting aluminum plate 32, and openings 34 are provided at corresponding positions of the first connecting aluminum plate 31 and the second connecting aluminum plate 32.

[0031] Attached Figure 5 This is a three-dimensional diagram of the control circuit board of the DC fast charging converter for new energy vehicles according to the utility model, attached Figure 6 This is a circuit diagram of the control circuit board of the DC fast charging converter for new energy vehicles according to the utility model, attached Figure 7 The schematic diagram of the circuit of the control circuit board of the DC fast charging converter for new energy vehicles according to the utility model. A control circuit board 35 is installed on the housing base 1, and the control module 35 is located below the first connecting aluminum plate 31. A heat transfer cotton 36 is arranged between the control module 35 and the first connecting aluminum plate 31. The substrate material adopts a single-layer double-sided board of FR-4, the copper foil thickness is 35um, the plate thickness is: 1.5±0.15mm, the surface treatment adopts lead-free tin spraying, the split mode is ROUTE, the solder mask ink adopts lead-free green matte, the text ink is lead-free white, and the temperature resistance is 135°C.

[0032] The control circuit board 35 has a first connecting hole 351, a second connecting hole 352, a third connecting hole 353, and a fourth connecting hole 354. Claw springs 37 are respectively arranged in the first connecting hole 351, the second connecting hole 352, the third connecting hole 353, and the fourth connecting hole 354. The lower end of the first control terminal 24 passes through the opening 34 and is inserted into the first connecting hole 351. The lower end of the second control terminal 25 passes through the opening 34 and is inserted into the second connecting hole 352. The upper end of the first control adapter terminal 15 is inserted into the third connecting hole 353. The upper end of the second control terminal 16 is inserted into the fourth connecting hole 354. The first control terminal 24, the first control adapter terminal 15, the second control terminal 25, and the second control terminal 16 are respectively connected to the corresponding claw springs 37.

[0033] The first connection hole 351 and the third connection hole 353 are located on one side of the control circuit board 35, the second connection hole 352 and the fourth connection hole 354 are located on the other side of the control circuit board 35, and the grounding terminal 17 passes through the gap between the two sides of the control circuit board 35. The control circuit board 35 has a mounting hole 38, and the screw 9 passes through the mounting hole 38 to fix the control circuit board 35 on the housing base 1.

[0034] The first control terminal 24 and the first control adapter terminal 15 are connected to each other through the first line 355. The first line 355 includes a first temperature-controlled switch 357 and a second temperature-controlled switch 358 connected in series. The second temperature-controlled switch 358 is connected in parallel with a chip resistor 359. The working temperature of the first temperature-controlled switch 357 is greater than the working temperature of the second temperature-controlled switch 358. The second control terminal 25 and the second control terminal 16 are connected through the second line 356. During use, if the charging temperature reaches the working temperature of the second temperature-controlled switch 358, the second temperature-controlled switch 358 will be disconnected, and the chip resistor 359 transmits a weakened control signal through the first line 355, so that the charging current of the charging pile is reduced. If the temperature further reaches the working temperature of the first temperature-controlled switch 357, the first temperature-controlled switch 357 will be further disconnected, so that the control signal will be disconnected from the charging pile, and the charging process will automatically stop. On the contrary, when the temperature drops below the operating temperature of the first temperature control switch 357 or the second temperature control switch 358, the first temperature control switch 357 or the second temperature control switch 358 will restore the connection state, and the charging pile will automatically restore the corresponding charging process. The circuit design of thermal overcurrent protection has high safety and ensures the safety of charging.

[0035] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for the purpose of limitation. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. A DC fast charging converter for new energy vehicles, characterized in that: include: A housing base (1), wherein a high-voltage input terminal (11) and a low-voltage input terminal (12) are disposed on a bottom surface of the housing base (1), wherein the high-voltage input terminal (11) is located at the front side of the housing base (1), wherein a first high-voltage transfer column (13) and a second high-voltage transfer column (14) are disposed inside the high-voltage input terminal (11), and wherein a first control transfer column (15), a second control transfer column (16) and a first end of a grounding terminal (17) are disposed inside the low-voltage input terminal (12); A housing cover (2) mounted on the housing base (1), the top surface of the housing cover (2) being provided with an output terminal (21), the output terminal (21) being located at the rear side of the housing cover (2), the output terminal (21) being provided with a first high-voltage terminal (22), a second high-voltage terminal (23), a first control terminal (24), a second control terminal (25) and a second end of a ground terminal (17); A first connecting aluminum plate (31) and a second connecting aluminum plate (32) are arranged between the housing base (1) and the housing cover (2); positioning plates (33) are arranged outside the first connecting aluminum plate (31) and the second connecting aluminum plate (32) so that the second connecting aluminum plate (32) is stacked on top of the first connecting aluminum plate (31) in an interval and partially staggered manner; the lower end of the first high-voltage terminal (22) extends downwardly to be connected to the rear end of the first connecting aluminum plate (31); the lower end of the second high-voltage terminal (23) extends downwardly to be connected to the rear end of the second connecting aluminum plate (31); The rear end of the aluminum plate (32), the upper end of the first high-voltage transfer column (13) extends upward and is connected to the front end of the first connecting aluminum plate (31), the upper end of the second high-voltage transfer column (14) extends upward and is connected to the front end of the second connecting aluminum plate (32), the first connecting aluminum plate (31) and the second connecting aluminum plate (32) are provided with openings (34) at corresponding positions, and a control circuit board (35) is installed on the housing base (1), and the control circuit board (35) is located below the first connecting aluminum plate (31). The plate (35) has a first connection hole (351), a second connection hole (352), a third connection hole (353), and a fourth connection hole (354); the lower end of the first control terminal (24) passes through the opening (34) and is inserted into the first connection hole (351); the lower end of the second control terminal (25) passes through the opening (34) and is inserted into the second connection hole (352); the upper end of the first control adapter column (15) is inserted into the third connection hole (353); and the upper end of the second control adapter column (16) is inserted into the fourth connection hole (354). , wherein the first control terminal (24) and the first control adapter terminal (15) are interconnected via a first circuit (355), the first circuit (355) comprises a first temperature-controlled switch (357) and a second temperature-controlled switch (358) connected in series, the second temperature-controlled switch (358) is connected in parallel with a chip resistor (359), the operating temperature of the first temperature-controlled switch (357) is greater than the operating temperature of the second temperature-controlled switch (358), and the second control terminal (25) and the second control adapter terminal (16) are connected via a second circuit (356).

2. The new energy vehicle DC fast charging converter according to claim 1 is characterized in that: The first connection hole (351) and the third connection hole (353) are located on one side of the control circuit board (35), the second connection hole (352) and the fourth connection hole (354) are located on the other side of the control circuit board (35), and the grounding terminal (17) passes through the gap between the two sides of the control circuit board (35).

3. The new energy vehicle DC fast charging converter according to claim 1 is characterized in that: The control circuit board (35) has a mounting hole (38), and a first screw (9) passes through the mounting hole (38) to fix the control circuit board (35) on the housing base (1).

4. The new energy vehicle DC fast charging converter according to claim 1, characterized in that: The second screw (10) fixes the first connecting aluminum plate (31), the second connecting aluminum plate (32), and the positioning plate (33) onto the housing base (1).

5. The new energy vehicle DC fast charging converter according to claim 1 is characterized in that: The first connection hole (351), the second connection hole (352), the third connection hole (353), and the fourth connection hole (354) are respectively provided with claw springs (37); the first control terminal (24), the first control adapter terminal (15), the second control terminal (25), and the second control adapter terminal (16) are respectively connected to corresponding claw springs (37); and heat transfer cotton (36) is provided between the control circuit board (35) and the first connection aluminum plate (31).

6. The new energy vehicle DC fast charging converter according to claim 1, characterized in that: The tops of the first high-voltage terminal (22) and the second high-voltage terminal (23) are respectively formed of a clamp-like structure by milling a groove through a silver-plated copper column, and the outer part of the clamp-like structure of the first high-voltage terminal (22) and the second high-voltage terminal (23) is provided with a clamping ring (26), and the inner part of the clamp-like structure of the first high-voltage terminal (22) and the second high-voltage terminal (23) is provided with a core column (27), and the end of the core column (27) of the clamp-like structure of the first high-voltage terminal (22) and the second high-voltage terminal (23) is installed with an insulating terminal cap (28).

7. The new energy vehicle DC fast charging converter according to claim 1, characterized in that: The diameters of the first high-voltage adapter post (13) and the second high-voltage adapter post (14) are larger than the diameters of the first control adapter post (15), the second control adapter post (16) and the grounding terminal (17); the diameters of the first high-voltage terminal (22) and the second high-voltage terminal (23) are larger than the diameters of the first control terminal (24), the second control terminal (25) and the grounding terminal (17).

8. The new energy vehicle DC fast charging converter according to claim 1, characterized in that: The first high-voltage transfer post (13), the second high-voltage transfer post (14), the first control transfer post (15), the second control transfer post (16), the grounding terminal (17), the first high-voltage terminal (22), the second high-voltage terminal (23), the first control terminal (24), and the second control terminal (25) are respectively sleeved with rubber rings (4), and a rubber sleeve (5) is sleeved between the first end and the second end of the grounding terminal (17).

9. The new energy vehicle DC fast charging converter according to claim 1, characterized in that: A transmission pressure rod (6) and a spring (7) are provided between the housing base (1) and the housing cover (2), and the transmission pressure rod (6) elastically extends out of the top surface of the housing cover (2).

10. The new energy vehicle DC fast charging converter according to claim 1, characterized in that: The edge of the housing base (1) is provided with a sealing ring (18), and the housing base (1) and the housing cover (2) are connected via a self-locking connecting rod (19) and then ultrasonically welded and sealed.

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