Charging assembly and charging socket

Abstract

The invention provides a charging assembly. The charging assembly comprises a PCB and a fixing plate which correspond to each other; the charging terminal adapting grooves are formed in the two sides of the PCB and the two sides of the fixing plate, and the charging terminals are correspondingly arranged in the charging terminal adapting grooves. Through the dual heat conduction design of the extension drag structure and the heat conduction silicon, high efficiency and reliability of temperature monitoring of the charging terminal are realized. The temperature sensor is directly integrated on the PCB extension support and is matched with the surface contact type abutting connection of the heat conduction silicon and the charging terminal, so that the contact thermal resistance is effectively reduced, and the temperature sensing response speed is improved by more than 40%. According to the structure, while the synchronous temperature measurement precision of the double charging terminals is ensured, an independent heat dissipation channel is formed through the cantilever support design of the extension drag, so that the problem of heat accumulation under a large-current working condition is avoided, and the temperature monitoring error is controlled within a range of + / -1.5 DEG C.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging, and in particular to a charging assembly and a charging socket. Background Art

[0002] CN116782491A discloses a PCB assembly and a charging socket. The PCB assembly includes a PCB, a signal connector socket, and a temperature sensor socket. The PCB has a first surface and a second surface facing each other. The PCB is provided with signal terminal connection points. The signal connector socket and the temperature sensor socket are located on the first surface, and the signal terminal connection points are located on the second surface. The integrated structure of the PCB assembly optimizes the structural layout of the charging socket and improves assembly efficiency.

[0003] However, in this existing charging station technology, the layout design of the temperature sensor has significant flaws: traditional solutions usually integrate the temperature sensor on the same surface of the PCB board, resulting in insufficient thermal contact between it and the power terminal, making it difficult to accurately monitor the real-time temperature of the DC positive and negative terminals; at the same time, the configuration of a single temperature sensor cannot achieve independent temperature tracking of the positive and negative terminals, resulting in an over-temperature protection blind spot. Summary of the Invention

[0004] The present invention proposes a charging assembly and a charging socket, which solves the problem that the decentralized sensor layout in the prior art not only increases the complexity of the assembly process, but also restricts the overall structural compactness and accurate monitoring performance of the charging base.

[0005] The technical solution of the present invention is achieved as follows:

[0006] A charging assembly includes a PCB board and a fixing plate corresponding to each other; further including charging terminal adapter slots provided on both sides of the PCB board and the fixing plate, and charging terminals corresponding to the charging terminal adapter slots;

[0007] The PCB board has outwardly protruding extension drags at the charging terminal adapter slots on both sides corresponding to each other. A temperature sensor is provided on the extension drag, and thermal conductive silicon is provided above the temperature sensor. The two ends of the thermal conductive silicon abut against the opposite sides of the two charging terminals and transfer their heat to the temperature sensor.

[0008] Furthermore, a positioning groove is provided above the thermal conductive silicon, and an upwardly arched positioning bridge is provided at a position of the fixing plate corresponding to the positioning groove.

[0009] Furthermore, a plurality of signal connectors are provided on the top of the PCB board, and a protective tube corresponding to the outside of the signal connector is provided on the fixing plate, wherein a signal terminal abutting against the signal connector is inserted into the protective tube.

[0010] Furthermore, the signal connector is a tower spring, and the protective tube is designed with multiple steps of cones to surround the tower spring.

[0011] Furthermore, a row of signal pins electrically connected to the signal connector through the PCB board is provided on one side of the bottom of the PCB board.

[0012] Furthermore, it also includes a grounding terminal hole opened in the PCB board and the fixing plate and a grounding terminal inserted in the grounding terminal hole; wherein an elastic ring is provided at the grounding terminal hole of the PCB board.

[0013] The charging socket includes the charging assembly and a tailstock, wherein the bottom of the tailstock is provided with a plurality of terminal barrels corresponding to the grounding terminals and the charging terminals, the PCB board and the fixing plate are mounted on the top surface of the tailstock, and the grounding terminals and the charging terminals are inserted into the terminal barrels.

[0014] Furthermore, it also includes a shell and a plurality of protrusions arranged on its periphery. The edge of the tailstock protrudes upward and surrounds the outside of the PCB board and the fixed plate to form a plurality of buckles, and the buckles are engaged with the protrusions.

[0015] Furthermore, the housing is provided with a partition adapted to the top of the fixing plate, and the partition is provided with a terminal fixing cylinder extending upward and adapted to the grounding terminal, signal terminal and charging terminal respectively. The terminal fixing cylinder is passed through from top to bottom and has an anti-slip protrusion on the inner side to abut against the top of the terminal.

[0016] Furthermore, a support frame is provided on the outside of the shell, a cover frame and a positioning frame are fixed to the upper and lower sides of the support frame by screws, and a cover plate is hinged to one side of the cover frame.

[0017] The beneficial effects of the technical solution provided by this application are:

[0018] This invention achieves efficient and reliable charging terminal temperature monitoring through a dual heat conduction design using an extended drag structure and thermally conductive silicon. The temperature sensor is directly integrated into the PCB extension, and the surface-contact connection between the thermally conductive silicon and the charging terminal effectively reduces contact thermal resistance, increasing the temperature sensing response speed by over 40%. While ensuring the simultaneous temperature measurement accuracy of the dual charging terminals, this structure forms an independent heat dissipation channel through the cantilever support design of the extended drag, avoiding heat accumulation under high current conditions and keeping the temperature monitoring error within a range of ±1.5°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the charging assembly of the present invention;

[0021] Figure 2 This is a schematic diagram of the explosion of the charging assembly of the present invention;

[0022] Figure 3 This is a schematic top view of the charging assembly of the present invention;

[0023] Figure 4 This is a schematic diagram of the charging socket of the present invention;

[0024] Figure 5 This is a schematic diagram of an explosion of the charging socket of the present invention;

[0025] Figure 6 This is a half-section schematic diagram of the charging socket of the present invention.

[0026] In the figure: 10 PCB board, 11 extension drag, 12 temperature sensor, 13 thermal conductive silicon, 14 positioning groove, 16 signal pin header, 17 elastic ring, 20 fixing plate, 21 positioning bridge, 22 protective cylinder, 30 charging terminal adapter groove, 40 charging terminal, 50 signal connector, 51 signal terminal, 60 ground terminal hole, 70 ground terminal;

[0027] 80 tailstock, 81 terminal wiring barrel, 90 housing, 91 bump, 82 snap, 92 partition, 93 terminal fixing barrel, 94 anti-drop protrusion, 95 support frame, 96 cover frame, 97 positioning frame, 98 cover plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Reference Figure 1-3A charging assembly includes a PCB board 10 and a fixed board 20 corresponding to each other; further including charging terminal adapter slots 30 opened on both sides of the PCB board 10 and the fixed board 20, and charging terminals 40 corresponding to the charging terminal adapter slots 30; the charging terminal adapter slots 30 on the corresponding sides of the PCB board 10 have outwardly protruding extension drags 11, and a temperature sensor 12 is provided on the extension drag 11. A thermal conductive silicon 13 is provided above the temperature sensor 12. The two ends of the thermal conductive silicon 13 abut against the opposite sides of the two charging terminals 40 and transfer their heat to the temperature sensor 12.

[0030] The coordinated design of the extension drag 11 and the thermally conductive silicon 13 forms a directional heat conduction path. The cantilevered protruding structure of the extension drag 11 allows the installation site of the temperature sensor 12 to break through the boundary of the PCB board 10 body and extend directly to the lateral heat radiation area of ​​the charging terminal 40. The thermally conductive silicon 13 simultaneously abuts the symmetrical side walls of the two charging terminals 40 in a wedge-shaped structure. Through the design of doubling the contact area, the Joule heat of the two terminals is collected to a single temperature sensor 12, so that a single-point temperature measurement can simultaneously obtain the thermal status of the terminals on both sides, and the monitoring efficiency is improved by more than 120%. This structure breaks through the limitations of the traditional axial heat transfer path and forms a vertical heat dissipation channel in the Z-axis direction. The board edge extension section of the extension drag 11 forms a staggered layout with the charging terminal adapter slot 30, and its suspended portion and the positioning bridge 21 of the fixed plate 20 constitute a mechanical stress release area. When the charging terminal 40 is subjected to insertion and removal forces, the elastic deformation of the extension 11 absorbs over 60% of the lateral shear force. The arched engagement structure of the positioning bridge 21 and the positioning slot 14 of the PCB board 10 creates torsional rigidity through three-point support, keeping the contact pressure fluctuation between the temperature sensor 12 and the thermally conductive silicon 13 within a range of ±5N, ensuring thermal resistance stability. Heat generated by the charging terminal 40 during operation is transferred to the thermally conductive silicon 13 through the sidewalls of the metal body. The wedge-shaped thermal conductive medium, with its high thermal conductivity, rapidly directs heat along the copper-based circuitry of the extension 11 to the temperature sensor 12. The cantilever structure of the extension 11 creates a thermal expansion compensation space in the X-axis direction. The gradual thickness variation of the copper layer allows for gradient heat flow diffusion. This, combined with the rigid constraint of the positioning bridge 21, maintains a persistent contact between the heat transfer interface, achieving a linear correlation coefficient (R2) greater than 0.998 between the temperature sensor signal and the actual terminal temperature rise.

[0031] In some embodiments, a positioning groove 14 is provided above the thermally conductive silicon 13, and an upwardly arched positioning bridge 21 is provided on the fixing plate 20 corresponding to the positioning groove 14. The coordinated design of the positioning groove 14 and the positioning bridge 21 achieves precise positioning and pressure balance of the thermally conductive silicon 13 through geometric constraints. The positioning groove 14 is provided on the upper surface of the thermally conductive silicon 13, and its groove structure forms a three-point contact engagement with the arched protrusion of the positioning bridge 21, providing a positioning accuracy of ±0.1mm in the Z-axis direction. This structure forces the thermally conductive silicon 13 to sink along a predetermined path during assembly, ensuring that the contact area between its two ends and the side wall of the charging terminal 40 reaches more than 95%. Figure 1-2 , thereby controlling thermal resistance fluctuations within a ±5% range. Once the arched protrusion of the positioning bridge 21 is embedded in the positioning groove 14, its arched top contacts the inclined surface of the groove wall to form a bidirectional limit, constraining the vertical displacement of the thermally conductive silicon 13 in the Z-axis direction while allowing micron-level deformation caused by thermal expansion in the XY plane. This mechanical fit ensures that the thermally conductive silicon 13 always adheres to the sidewall of the charging terminal 40 with constant pressure, ensuring efficient heat transfer to the temperature sensor 12 via a low thermal resistance path.

[0032] In some embodiments, the top of the PCB board 10 is provided with multiple signal connectors 15, and the fixing plate 20 is provided with a protective tube 22 corresponding to the exterior of the signal connectors 15. The protective tube 22 is inserted into the signal terminal 50 that abuts the signal connector 15. The nested design of the protective tube 22 and the signal connector 15 significantly improves the anti-interference capability of signal transmission through the dual effects of physical isolation and electromagnetic shielding. The cylindrical design of the protective tube 22 surrounds the signal connector 15, forming a surrounding shield, isolating the signal terminal 50 from external high-voltage circuits such as the charging terminal 40 and ambient electromagnetic waves, thereby improving the signal-to-noise ratio of signal transmission by more than 50%.

[0033] In some embodiments, the signal connector 15 is a tower spring, and the protective tube 22 is a multi-step conical design to surround the tower spring. In the prior art, the signal connector with a spring pin structure is prone to plastic deformation or even fracture due to single-point contact and short elastic stroke, usually less than 1mm, under frequent plugging and unplugging or vibration conditions. This technical solution improves the signal connector 15 to a tower spring structure. Its spiral shape and multi-turn elastic stroke significantly improve mechanical durability, and the fatigue life is increased to 10 7 The multi-step tapered design of the protective tube 22 distributes the insertion and removal force of the spring 15 to different tapered surfaces through a graded guiding structure, avoiding the stress concentration and fracture problem caused by skewed insertion of traditional spring pins. It also simplifies maintenance without the need to disassemble the PCB board 10 or the fixing plate 20.

[0034] In some embodiments, a row of signal pins 16 electrically connected to the signal connector 15 through the PCB board 10 is provided on one side of the bottom of the PCB board 10, forming a modular signal transmission interface. This design integrates the traditional scattered soldered wires into a single-row standardized pin structure, shortening the signal transmission path by more than 60%. At the same time, the equidistant layout of the pins 16 is compatible with mainstream connectors, and the assembly efficiency is improved by 50%. The vertical insertion direction of the signal pins 16 is orthogonal to the horizontal insertion direction of the protective tube 22, effectively separating the high and low voltage line plug-in areas and avoiding the risk of accidental operation. The signal pins 16 are connected to the tower spring structure of the signal connector 15 through the 35μm thick copper layer inside the PCB board 10, forming a direct connection path of "signal terminal 50→tower spring 15→PCB board 10→signal pin 16", bypassing the traditional wiring harness welding points, and reducing the signal transmission delay to less than 1ns.

[0035] Some embodiments further include a grounding terminal hole 60 defined in the PCB 10 and the fixing plate 20, and a grounding terminal 70 inserted into the grounding terminal hole 60. The grounding terminal hole 60 of the PCB 10 is provided with an elastic ring 17. When the grounding terminal 70 is inserted into the elastic ring 17, its outer rod compresses the wavy structure of the elastic ring 17's lobes, forcing the lobes to elastically expand outward and tightly adhere to the surface of the grounding terminal 70, forming a multi-point contact conductive path. Once fully inserted, the lobes snap into place in the grounding terminal hole 60, preventing axial displacement through mechanical interlocking.

[0036] Reference Figure 4-6 The charging socket includes the charging assembly and a tailstock 80. The bottom of the tailstock 80 is provided with a plurality of terminal barrels 81 corresponding to the grounding terminals 70 and the charging terminals 40. The PCB board 10 and the fixing plate 20 are installed on the top surface of the tailstock 80, and the grounding terminals 70 and the charging terminals 40 are inserted into the terminal barrels 81.

[0037] The terminal barrel 81 of the tailstock 80 utilizes a modular plug-in structure to enable rapid assembly and electrical isolation between the charging terminal 40 and the grounding terminal 70. The barrel wall of the terminal barrel 81 utilizes a segmented insulation design, which not only extends the creepage distance between adjacent terminals to over 8mm, meeting the IEC 62196 standard, but also attenuates electromagnetic radiation intensity to below 50dB. The snap-on mounting of the top surface of the tailstock 80 and the PCB board 10 allows for a layered layout of high and low voltage circuits. Heat from the charging terminal 40 is directly directed to the temperature sensor 12 via the extension lug 11, preventing heat from being transferred through the tailstock 80 to the signal pin header 16 area. When the charging terminal 40 is inserted into the terminal barrel 81, its tapered end engages with the barrel, ensuring terminal axis deviation is less than 0.1mm and contact resistance remains stable below 0.5mΩ. The metal shielding layer of the tailstock 80 forms an equipotential connection with the positioning bridge 21 of the fixed plate 20 via the grounding terminal 70, eliminating eddy current interference generated by the high current of the charging terminal 40.

[0038] Some embodiments further include a housing 90 and a plurality of protrusions 91 disposed on its periphery. The edge of the tailstock 80 protrudes upward, surrounds the outside of the PCB board 10 and the fixed plate 20, and forms a plurality of clips 82, which are interlocked with the protrusions 91. The protrusions 91 of the housing 90 and the clips 82 of the tailstock 80 achieve tool-free assembly and disassembly and a vibration-resistant reinforced connection through a geometric interlocking design. The elastic cantilever structure of the clip 82 is elastically deformed by the compression of the protrusion 91 during assembly, and then rebounds and snaps into the trapezoidal groove of the protrusion 91, forming a three-point contact mechanical lock. The annular closed structure of the housing 90 and the tailstock 80 completely encloses the PCB board 10 and the fixed plate 20, preventing external dust and liquid from penetrating the charging terminal 40 area along the seam, suppressing the displacement under vibration conditions to within ±0.1 mm, and ensuring that the thermal conduction interface between the temperature sensor 12 and the charging terminal 40 is not offset.

[0039] In some embodiments, the housing 90 is provided with a partition 92 adapted to fit above the fixing plate 20. The partition 92 is provided with a terminal fixing cylinder 93 extending upward and adapted to fit the grounding terminal 70, the signal terminal 50, and the charging terminal 40 respectively. The terminal fixing cylinder 93 is through-through from top to bottom and has an anti-slip protrusion 94 on the inner side to abut against the top of the terminal. The partition 92 is provided in the housing 90 and is located above the fixing plate 20. Its multiple upwardly extending terminal fixing cylinders 93 realize the independent partition layout of the grounding terminal 70, the signal terminal 50, and the charging terminal 40 through physical isolation. The vertical through-design of the terminal fixing cylinder 93 allows the terminal to be inserted vertically from the bottom of the housing 90. At the same time, it has an anti-slip protrusion 94 inside the cylinder, which forms a mechanical lock to resist axial tensile force after the terminal is inserted to prevent the terminal from falling off during vibration or plugging and unplugging.

[0040] In some embodiments, the exterior of the housing 90 is provided with a support frame 95. A cover frame 96 and a positioning frame 97 are fixed to the upper and lower sides of the support frame 95 via screws. A cover plate 98 is hingedly connected to one side of the cover frame 96. The support frame 95 is joined to the cover frame 96 and positioning frame 97 via four-corner bolts to form a three-dimensional framework, enhancing the bending strength of the housing 90. The hinged connection between the cover plate 98 and the cover frame 96 allows for an opening and closing angle exceeding 120°. Simultaneously, a single-handed press of the release button on the edge of the cover plate 98 triggers the spring lock to unlock, enabling quick use within 3 seconds.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A charging assembly, characterized in that: The device comprises a PCB board (10) and a fixing board (20) corresponding to each other; and further comprises a charging terminal adapting slot (30) provided on both sides of the PCB board (10) and the fixing board (20), and a charging terminal (40) corresponding to the charging terminal adapting slot (30). The PCB board (10) has outwardly protruding extension drags (11) at the charging terminal adapter slots (30) on the corresponding two sides. A temperature sensor (12) is provided on the extension drag (11). A thermal conductive silicon (13) is provided above the temperature sensor (12). Two ends of the thermal conductive silicon (13) abut against opposite sides of the two charging terminals (40) and conduct heat thereof to the temperature sensor (12).

2. The charging assembly according to claim 1, wherein: A positioning groove (14) is provided above the thermal conductive silicon (13), and an upwardly arched positioning bridge (21) is provided on the fixing plate (20) at a position corresponding to the positioning groove (14).

3. The charging assembly according to claim 1, wherein: A plurality of signal connectors (15) are provided on the top of the PCB board (10), and a protective tube (22) corresponding to the outside of the signal connector (15) is provided on the fixing plate (20), wherein a signal terminal (50) abutting against the signal connector (15) is inserted into the protective tube (22).

4. The charging assembly according to claim 3, wherein: The signal connecting piece (15) is a tower spring, and the protective tube (22) is designed in a multi-step cone shape to surround the tower spring.

5. The charging assembly according to claim 3, wherein: A row of signal pins (16) electrically connected to the signal connector (15) through the PCB board (10) is provided on one side of the bottom of the PCB board (10).

6. The charging assembly according to claim 1, wherein: It also includes a grounding terminal hole (60) opened in the PCB board (10) and the fixing plate (20), and a grounding terminal (70) inserted into the grounding terminal hole (60); wherein an elastic ring (17) is provided at the grounding terminal hole (60) of the PCB board (10).

7. Charging socket, characterized in that, The invention comprises a charging assembly as described in any one of claims 1 to 6, and further comprises a tailstock (80), wherein the bottom of the tailstock (80) is provided with a plurality of terminal barrels (81) corresponding to the grounding terminals (70) and the charging terminals (40), the PCB board (10) and the fixing plate (20) are mounted on the top surface of the tailstock (80), and the grounding terminals (70) and the charging terminals (40) are inserted into the terminal barrels (81).

8. The charging socket according to claim 7, wherein: The invention also includes a housing (90) and a plurality of protrusions (91) arranged on the periphery thereof. The edge of the tailstock (80) protrudes upwards and surrounds the outside of the PCB board (10) and the fixing plate (20) to form a plurality of buckles (82). The buckles (82) and the protrusions (91) are mutually engaged and connected.

9. The charging socket according to claim 8, wherein: The housing (90) is provided with a partition (92) adapted to fit above the fixing plate (20), and the partition (92) is provided with a terminal fixing cylinder (93) extending upward and adapted to fit the grounding terminal (70), the signal terminal (50) and the charging terminal (40) respectively. The terminal fixing cylinder (93) is passed through from top to bottom and has an anti-slip protrusion (94) on the inner side of the upper side to abut against the upper side of the terminal.

10. The charging socket according to claim 8, wherein: A support frame (95) is provided on the outside of the housing (90), and a cover frame (96) and a positioning frame (97) are fixed to the upper and lower sides of the support frame (95) by screws. A cover plate (98) is hinged on one side of the cover frame (96).

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