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CN-122026181-A - Built-in resistor structure of new energy electric car charging seat

CN122026181ACN 122026181 ACN122026181 ACN 122026181ACN-122026181-A

Abstract

The invention relates to the technical field of new energy automobile charging, in particular to a built-in resistor structure of a new energy electric car charging seat, which comprises a PP terminal, a CP terminal, a PE terminal, a PCB bracket and PCBFR plates, wherein the PE terminal is connected with the PCBFR plates through conductive elastic sheets. The invention has the advantages of internally arranging the resistor component, effectively saving the space of a charging area, facilitating compact layout of peripheral components, avoiding the resistor from being exposed to the outside, preventing connection looseness and performance attenuation caused by the influence of environmental factors, improving signal transmission stability, realizing the assembly in one step by an integrated design, reducing the later maintenance difficulty and cost by a detachable fixing mode, flexibly selecting the resistance and the power of the resistor, adapting to the AC/DC charging seats with different specifications and meeting the national standard requirements.

Inventors

  • JU XINJIAN
  • CHEN HAO

Assignees

  • 常州柯特瓦电子股份有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. A built-in resistor structure of a new energy electric car charging seat is characterized by comprising a PP terminal (1), a CP terminal (2), a PE terminal (3), a PCB support (4) and a PCBFR plate (5), wherein the PP terminal (1), the CP terminal (2) and the PE terminal (3) are of cylindrical structures and are made of copper alloy materials and are subjected to nickel plating silver plating, the PCB support (4) is provided with a PP terminal hole (41) used for penetrating the PP terminal (1), a CP terminal hole (42) penetrating the CP terminal (2), a PE terminal hole (43) penetrating the PE terminal (3), a sliding groove (44), at least two fixing holes (45) and a welding spot accommodating groove (46), the PCBFR plate (5) is provided with a PP penetrating hole (51) used for penetrating the PP terminal (1), a CP penetrating the CP terminal (52), a PE penetrating the PE terminal (3) and a PP signal leading-out hole (54), a CP signal leading-out hole (55), an integrated resistor (56), a protection circuit (57) and an electric signal (58), and the PE terminal (53) are further provided with a conductive spring plate (58), and the conductive plate (4) is connected with the electric car.
  2. 2. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein an electromagnetic shielding layer is attached to the surface of the PCBFR board (5), the electromagnetic shielding layer is made of copper foil, and an adaptation through hole is formed in the PP penetrating hole (51), the CP penetrating hole (52), the PE penetrating hole (53), the PP signal leading-out hole (54) and the CP signal leading-out hole (55) of the PCBFR board (5), and the edge of the electromagnetic shielding layer is tightly attached to the inner side wall of the PCB support (4).
  3. 3. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein an elastic buffer component (6) is annularly arranged on the outer side wall of the PCB support (4), the elastic buffer component (6) comprises a component support and arc-shaped rubber buffer pads uniformly distributed on the outer side of the component support, the component support and the outer side wall of the PCB support (4) are integrally formed, and the outer surface of each arc-shaped rubber buffer pad is of an arc-shaped structure.
  4. 4. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein a temperature sensing module (7) is embedded at a position, close to the integrated resistor (56), on the PCBFR board (5), and the temperature sensing module (7) is electrically connected with a protection circuit structure (57) of the PCBFR board (5) through a temperature measurement data transmission pin.
  5. 5. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein the exposed end (14) of the PP terminal (1), the exposed end (24) of the CP terminal (2) and the exposed end (34) of the PE terminal (3) are respectively sleeved with a silicone rubber waterproof sealing sleeve, and the silicone rubber waterproof sealing sleeve is made of silicone rubber and is in interference fit with a through hole of a charging seat shell.
  6. 6. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein a polyimide high temperature resistant insulating pad is laid in a welding spot accommodating groove (46) of the PCB support (4), is made of polyimide, and covers a welding spot area of the PCBFR board (5).
  7. 7. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein the integrated resistor (56) is a chip resistor, the resistance range is 100 Ω -10kΩ, the power range is 0.25W-2W, and the integrated resistor (56) is fixed on the PCBFR board (5) through a reflow soldering process.
  8. 8. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein the gap between the PP terminal (1) and the PP through hole (51) of the PCBFR plate (5) and the gap between the CP terminal (2) and the CP through hole (52) of the PCBFR plate (5) are filled with high-temperature soldering tin, and the thickness of the soldering tin layer is 0.5-1mm.
  9. 9. The built-in resistor structure of the new energy electric car charging seat according to claim 1, wherein an installation guiding convex strip (47) is arranged on the inner side of a sliding groove (44) of the PCB support (4), a board body guiding groove (59) matched with the installation guiding convex strip (47) is formed on the edge of the PCBFR board (5), and the installation guiding convex strip (47) is in sliding fit with the board body guiding groove (59).
  10. 10. The built-in resistor structure of the new energy electric car charging seat according to any one of claims 1-9, characterized in that an internal thread is arranged in a fixing hole (45) of the PCB support (4), and is fixedly connected with an inner cavity of the charging seat through a fixing bolt, and a flat washer and an elastic washer are arranged between the head of the fixing bolt and the fixing hole (45).

Description

Built-in resistor structure of new energy electric car charging seat Technical Field The invention relates to the technical field of new energy automobile charging, in particular to a built-in resistor structure of a new energy electric car charging seat. Background With the promotion of new energy automobile popularity, charging system is as the core supporting facility of new energy automobile, and its security and stability directly influence user's use experience and vehicle operation safety. The charging seat is used as a key component for connecting the charging system with the vehicle, and has accurate signal identification, fault detection and safety protection capability. In the prior art, the resistor element of the charging stand of the new energy automobile is usually installed externally, that is, the resistor is connected by a wire and then fixed on the outside of the charging stand shell or in the peripheral wire harness. The external structure has the defects of large space occupation, inconvenience for compact layout of peripheral components of the charging seat, particularly outstanding space limitation problem of a small new energy automobile, poor stability, easy influence of vibration, temperature change, dust and water vapor on the external resistor when the external resistor is exposed in the external environment of the automobile for a long time, loose resistor connection, performance attenuation or short circuit, misjudgment of charging signals, even potential safety hazard, low installation efficiency, independent wiring, fixing and protection treatment of the external resistor, increased production and assembly procedures, increased later maintenance difficulty and cost, high signal interference risk, long distance between the external resistor and an internal conductive terminal and a signal wire of the charging seat, easy interference of peripheral electromagnetic signals on a connecting wire, and unstable transmission of resistance detection signals. Meanwhile, even if a part of charging seats try to embed resistors in the prior art, the electric connection between the resistors and terminals is simply realized, the problems of vibration impact, electromagnetic interference, temperature and humidity change, water resistance, moisture resistance and the like of the charging environment in the running process of a vehicle are not considered, the built-in components are still easy to fall off of welding spots, signal distortion, overheat damage of components and the like, and the development requirements of the high reliability and the high safety of the charging system of the new energy automobile cannot be met. Disclosure of Invention The invention aims to solve the technical problems of large space occupation, poor stability, low installation efficiency and high signal interference of an external structure of a new energy electric car charging seat resistor in the prior art, and solves the problems of no protection, easy failure and low assembly precision of a simple built-in resistor structure. The technical scheme includes that the built-in resistor structure of the new energy electric car charging seat comprises a PP terminal, a CP terminal, a PE terminal, a PCB support and PCBFR plates, wherein the PP terminal, the CP terminal and the PE terminal are of cylindrical structures and are made of copper alloy materials and are subjected to nickel plating and silver plating, the PCB support is provided with a PP terminal hole used for penetrating the PP terminal, a CP terminal hole penetrating the CP terminal and a PE terminal hole penetrating the PE terminal, a chute, at least two fixing holes and welding spot accommodating grooves are further formed in the PCB support, the PCBFR plates are provided with PP penetrating holes used for penetrating the PP terminal, CP penetrating holes penetrating the CP terminal, PE penetrating holes penetrating the PE terminal, PP signal leading-out holes, CP signal leading-out holes, integrated resistors, a protection circuit structure and conductive elastic pieces, and the PE terminals are further provided with the conductive elastic pieces and the PCBFR plates to realize electric signal connection. The surface laminating of PCBFR board has electromagnetic shield layer, electromagnetic shield layer is copper foil material, and corresponds PCBFR board's PP wears to establish hole, CP wears to establish the hole, PE wears to establish hole, PP signal extraction hole, CP signal extraction hole and has seted up the adaptation through-hole, electromagnetic shield layer's edge and the inseparable laminating of PCB support's inside wall. The outer side wall ring of PCB support is equipped with elastic buffer assembly, elastic buffer assembly includes the subassembly support and evenly distributed is at the arc rubber buffer pad in the subassembly support outside, the outer side wall integrated into one piece of subassembly support and PCB support, the