Charging socket signal switching mode

Abstract

The invention relates to the technical field of vehicle charging sockets, in particular to a charging socket signal switching mode. According to the charging socket signal switching mode, a socket shell is included, an inner cavity of the socket shell is divided into a DC cavity and an AC cavity, a DC circuit board and an AC circuit board are connected with SMD thermistors respectively so as to measure the temperature of DC and AC power terminals, the DC circuit board and the AC circuit board are connected with multi-PIN connectors respectively, and multi-PIN contact pins are integrated in the socket shell. The two ends of the multi-PIN pin extend into the DC cavity and the AC cavity respectively and are connected with the multi-PIN connector of the DC circuit board and the multi-PIN connector of the AC circuit board in an inserted mode, so that a DC power terminal temperature signal is transmitted to the AC circuit board through the multi-PIN connector of the DC circuit board, the multi-PIN pin and the multi-PIN connector of the AC circuit board in sequence and led out through the low-voltage connector of the AC circuit board. Through a signal switching mode of integrating the PINs in the socket shell, the split type design of the AC cavity and the DC cavity can be realized, so that the assembling performance and the sealing reliability of the product are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging sockets, and in particular to a charging socket signal switching method. Background Art

[0002] New energy vehicles are charged through the vehicle's charging socket. European and American standard combo charging sockets, in addition to power terminals, also feature low-voltage signal terminals (PP, CP, and CS), as well as temperature sensor wiring for monitoring the power terminal temperature. The wiring for each low-voltage signal terminal and the temperature sensor wiring are all low-voltage signal outgoing wires. Multiple low-voltage signal outgoing wires reduce wiring harness assembly efficiency. Connecting the low-voltage control and temperature sensor signals to a circuit board integrated within the socket and ultimately routing all low-voltage signals through the circuit board's low-voltage connector effectively addresses this low-voltage wiring harness assembly issue. European and American standard combo charging sockets are integrated AC / DC charging sockets. To avoid the increased cost and assembly complexity associated with separate low-voltage connectors for the AC and DC modules, the temperature sensor signal from the DC power terminal is typically routed to the AC circuit board. The AC circuit board's low-voltage connector then routes all low-voltage signals, including the DC power terminal temperature sensor signal, AC power terminal temperature sensor signal, and low-voltage control signal, outgoing wires.

[0003] Current implementation methods for DC and AC signal transmission, such as Figure 1 As shown, the charging socket includes a socket housing 1 and a tail cover 9 fixedly connected to the rear of the socket housing 1. A sealing ring groove 1-1 is provided on the outer side surface of the rear of the socket housing 1 for installing a sealing ring (not shown in the figure) to achieve a sealed fit between the tail cover 9 and the socket housing 1. A DC power terminal 2, an AC power terminal 3, a low-voltage signal terminal (not shown in the figure) and an AC circuit board 5 are installed in the cavity of the socket housing 1. A low-voltage connector 6 is connected to the AC circuit board 5. The temperature of the DC power terminal 2 is measured by a temperature sensor 7 with a swing-wire plug. The swing-wire plug 7-1 is plugged into the plug-in 8 on the AC circuit board 5 inside the cavity to achieve the transfer of the temperature sensor signal. The wiring of the DC power terminal 2 and the AC power terminal 3 is led out from the tail cover 9 to the rear.

[0004] Because this implementation requires the transfer transmission of the DC temperature sensor signal and the AC circuit board inside the socket, the AC and DC cavities need to be made into an integrated structure. The seal between the tail cover and the socket shell needs to adopt a large-area circumferential sealing structure, which has the problem of low sealing reliability and the disadvantage that the AC and DC cannot be assembled separately. Summary of the Invention

[0005] The present invention aims to provide a charging socket signal transfer method to solve the problems of existing charging socket signal transfer methods, which require the transfer and transmission of DC temperature sensor signals and AC circuit boards inside the socket. This results in the AC and DC cavities having to be an integrated structure, and a large-area circumferential sealing structure is required between the tail cover and the socket housing. This has low sealing reliability and the DC and AC cannot be assembled separately.

[0006] The present invention adopts the following technical solutions: A charging socket signal transfer method includes a socket housing, wherein the inner cavity of the socket housing is divided into a DC cavity and an AC cavity, a DC power terminal and a DC circuit board are installed in the DC cavity, and an AC power terminal and an AC circuit board are installed in the AC cavity, the DC and AC circuit boards are respectively connected to chip thermistors for measuring the temperature of the DC and AC power terminals, the DC and AC circuit boards are respectively connected to multi-PIN connectors, and the AC circuit board is also connected to a low-voltage connector, and the socket housing is integrated with multi-PIN pins, the ends of the multi-PIN pins extend into the DC and AC cavities respectively and are plugged into the multi-PIN connectors of the DC and AC circuit boards, so that the DC power terminal temperature signal is transmitted to the AC circuit board in sequence through the multi-PIN connector of the DC circuit board, the multi-PIN pins, and the multi-PIN connector of the AC circuit board, and is led out through the low-voltage connector of the AC circuit board.

[0007] Furthermore, the DC and AC cavities are arranged longitudinally along the socket housing, the DC cavity is located on the lower side of the AC cavity, the multi-pin connector of the DC circuit board is located on the upper part of the DC circuit board, and the multi-pin connector of the AC circuit board is located on the lower part of the AC circuit board, so as to reduce the distance between the multi-pin connectors of the DC and AC circuit boards.

[0008] Furthermore, the multi-PIN plug and the socket housing are injection molded as one piece.

[0009] Furthermore, the multi-PIN pin is a 3-PIN pin, and the multi-PIN connector is a 3-PIN connector.

[0010] Furthermore, a tail cover is fixedly connected to the tail of the socket housing, and the tail cover is fixed to the socket housing through a snap-fit ​​structure.

[0011] Furthermore, a buckle is provided on the outer surface of the socket housing, and a buckle groove is correspondingly provided on the tail cover. The buckle is snapped into the buckle groove to prevent the tail cover from retreating, thereby achieving one-time fixation of the tail cover and the socket housing.

[0012] Furthermore, the tail cover is fixed to the socket housing for a second time by screws.

[0013] Furthermore, the tail of the socket housing is fixedly connected to a tail cover, and a sealing ring is used to seal the tail cover and the socket housing. The sealing ring includes a ring body and a limiting edge connected to one end of the ring body. The limiting edge is clamped between the rear end face of the socket housing and the tail cover to position the sealing ring. The ring body is inserted into the interior of the socket housing to form a sealing fit with the inner cavity wall of the socket housing.

[0014] Furthermore, a tail cover is fixedly connected to the rear of the socket housing, and the tail cover is provided with DC and AC power terminal mounting holes. The DC and AC power terminals are respectively inserted into the DC and AC power terminal mounting holes from the rear of the socket. The DC and AC power terminals both have rearward positioning surfaces. A plurality of cantilever spring claws are circumferentially spaced at the front end openings of the DC and AC power terminal mounting holes. The diameter of the circle surrounded by the plurality of cantilever spring claws is smaller than the outer diameter of the positioning surface of the DC and AC power terminals. The positioning surface passes forward over the cantilever spring claws so that the cantilever spring claws form a block with the positioning surface from the rear side, thereby preventing the DC and AC power terminals from retreating.

[0015] Furthermore, a flexible thermal pad is provided on the chip thermistor, and heat is conducted through the flexible thermal pad in contact with the DC and AC power terminals.

[0016] Beneficial effects: The present invention is a pioneering invention. The inner cavity of the socket housing is divided into a DC cavity and an AC cavity. The DC and AC cavities adopt a split design. The DC power terminal and the DC circuit board are installed in the DC cavity, and the AC power terminal and the AC circuit board are installed in the AC cavity. The DC and AC circuit boards are respectively connected with chip thermistors to measure the temperature of the DC and AC power terminals, so that the DC and AC can be assembled separately. Multi-pin connectors are respectively connected to the DC and AC circuit boards. Multi-pin pins are integrated inside the socket housing. The multi-pin connectors of the DC and AC circuit boards are connected through the multi-pin pins. The collected DC power terminal temperature signal is first transmitted to the multi-pin pins through the multi-pin connector on the DC circuit board, and then transmitted to the multi-pin connector on the AC circuit board by the multi-pin pins. In this way, the DC power terminal temperature signal is transmitted to the AC circuit board. The AC circuit board leads the collected DC power terminal temperature signal, AC power terminal temperature signal and other low-voltage signals through the low-voltage connector. This signal transfer method can realize the split design of DC and AC cavities, realize separate assembly of DC and AC, and improve the assembly performance of the product. Moreover, after realizing the split design of DC and AC cavities, when the tail cover is connected to the rear of the socket shell to seal the DC and AC cavities, the rear of the socket shell and the tail cover can be sealed by two small sealing rings, replacing the integrated cavity structure with a sealing structure with a large-area circumferential seal, thereby improving the sealing reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the structure of an implementation method for implementing DC and AC signal transmission inside a socket in the prior art; Figure 2 This is an exploded view of an embodiment of the charging socket signal transfer method of the present invention; Figure 3 This is a schematic diagram of the internal structure of the socket housing in an embodiment of the charging socket signal transfer method of the present invention; Figure 4 This is a cross-sectional view of the socket housing along the middle longitudinal direction in an embodiment of the charging socket signal transfer method of the present invention; Figure 5 This is a structural diagram of a DC circuit board in an embodiment of a charging socket signal transfer method of the present invention; Figure 6 This is a structural diagram of the DC circuit board in an embodiment of the charging socket signal transfer method of the present invention from another perspective; Figure 7 This is a structural diagram of an AC circuit board in an embodiment of the charging socket signal transfer method of the present invention; Figure 8 This is a schematic diagram of the DC and AC circuit boards implementing signal transfer via 3-pin connectors in an embodiment of the charging socket signal transfer method of the present invention; In the figure: 1. socket housing; 1-1. sealing ring groove; 1-2. AC cavity; 1-3. DC cavity; 1-4. buckle; 1-5. ridge; 2. DC power terminal; 2-1. DC terminal positioning surface; 3. AC power terminal; 3-1. AC terminal positioning surface; 4. low-voltage signal terminal; 5. AC circuit board; 6. low-voltage connector; 7. temperature sensor with drop-out plug; 7-1. drop-out plug; 8. plug-in on AC circuit board; 9. tail cover; 9-1. buckle groove; 9-2. AC power terminal mounting hole; 9-3. DC power terminal mounting hole; 10. DC circuit board; 13. chip thermistor; 14. flexible thermal pad; 15. AC sealing ring; 17. DC sealing ring; 19. screw; 20. 3-PIN pin; 21. 3-PIN connector; 22. cantilever spring claw; 23. ring body; 24. limiting edge; 25. lug. DETAILED DESCRIPTION

[0018] Existing charging socket signal transfer methods require the DC temperature sensor signal to be transferred and transmitted to the AC circuit board within the socket cavity. This necessitates an integrated structure for the AC and DC cavities, requiring a large-area circumferential seal between the tail cover and the socket housing. This results in low sealing reliability and the inability to separate the DC and AC cavities for assembly. The present invention provides a charging socket signal transfer method that achieves a separate design for the DC and AC cavities, thereby improving product assembly and sealing reliability.

[0019] The basic inventive concept of the present invention is: by integrating a PIN pin signal conversion method in the socket housing, the signal conversion and transmission between the DC circuit board temperature sensing signal and the AC circuit board is realized, and the split design of the AC and DC cavities is realized, so that the AC and DC can be assembled separately, thereby improving the assembly of the product; at the same time, the tail of the socket housing and the tail cover can be sealed by two small sealing rings, thereby improving the sealing reliability of the product.

[0020] Based on the above-mentioned inventive concept, an embodiment of the charging socket signal conversion method of the present invention is described in detail below.

[0021] like Figure 2 As shown, the charging socket signal adapter system includes a socket housing 1, several components mounted within the socket housing 1, and a tail cover 9 connected to the rear end of the socket housing 1. The socket housing 1 has six circumferentially arranged connecting ears, each with fastener mounting holes for fasteners to secure the socket to the vehicle body. The interior of the socket housing 1 is divided into a DC cavity 1-3 and an AC cavity 1-2. The tail cover 9 seals the rear ends of the DC cavity 1-3 and AC cavity 1-2, and the seals are achieved by a DC sealing ring 17 and an AC sealing ring 15. The AC circuit board 5 and AC power terminals 3 are mounted within the AC cavity 1-2, as are the low-voltage signal terminals 4. The DC circuit board 10 and DC power terminals 2 are mounted within the DC cavity 1-3. Chip thermistors 13 are connected to the DC circuit board 10 and AC circuit board 5, respectively, to measure the temperature of the DC power terminals 2 and AC power terminals 3. The DC circuit board 10 and the AC circuit board 5 are connected to a 3-pin connector 21, respectively. A 3-pin plug 20 is integrated into the socket housing 1 (see Figure 3-4 ), the 3PIN pin 20 is a special-shaped pin with multiple continuously bent sections. The two ends of the 3PIN pin 20 extend into the DC cavity 1-3 and the AC cavity 1-2 respectively, and are plugged into the 3PIN connector 21 on the DC circuit board 10 and the AC circuit board 5 (reference Figure 8 ), so that the collected temperature signal from DC power terminal 2 is transmitted sequentially through 3-pin connector 21 and 3-pin pin 20 on DC circuit board 10 to 3-pin connector 21 on AC circuit board 5, and then to AC circuit board 5. AC circuit board 5 then outputs the collected temperature signal from DC power terminal 2, along with the temperature signal from AC power terminal 3, and other low-voltage signals, through low-voltage connector 6 connected to AC circuit board 5. By integrating pins within socket housing 1, signal transfer and transmission between the temperature sensing signal from DC circuit board 10 and AC circuit board 5 is achieved, enabling a split design for the AC and DC cavities, offering improved split assembly and sealing reliability.

[0022] like Figure 2-4As shown in , the inner cavity of the socket housing 1 is divided into upper and lower cavities in the longitudinal direction, that is, the DC cavity 1-3 and the AC cavity 1-2 are arranged longitudinally along the socket housing 1, and the DC cavity 1-3 is located below the AC cavity 1-2. At this time, preferably, as shown in FIG. Figure 5-8 As shown in the figure, the 3PIN connector 21 of the DC circuit board 10 is located at the upper part of the DC circuit board 10, and the 3PIN connector 21 of the AC circuit board 5 is located at the lower part of the AC circuit board 5. This can reduce the longitudinal distance between the 3PIN connectors 21 on the DC circuit board 10 and the AC circuit board 5, thereby shortening the overall length of the 3PIN pins 20 and improving the signal transmission rate and transmission reliability.

[0023] In this embodiment, a 3-pin plug 20 and two 3-pin connectors 21 are used to realize signal transfer, which can greatly simplify the signal transfer structure and reduce the signal transfer transmission cost. When the two temperature sensor wires of DC+ and the two temperature sensor wires of DC- share a common negative pole, 3-pin is used at this time. Of course, in other embodiments, a 4-pin plug and two 4-pin connectors can also be used to realize signal transfer. For example, when the two temperature sensor wires of DC+ and the two temperature sensor wires of DC- do not share a common negative pole, 4-pin is used at this time; of course, when more functional requirements are required, more PIN plugs and connectors can be expanded to realize signal transfer.

[0024] The socket housing 1 is a plastic insulator, and the 3-pin connector 20 is integrally injection-molded with the socket housing 1. The 3-pin connector 20 is securely positioned within the socket housing 1 and prevents displacement, ensuring stable signal transmission. The 3-pin connector 20 is pre-molded within the socket housing 1. Subsequent assembly requires only inserting the two ends of the 3-pin connector 20 into the corresponding interfaces of the 3-pin connector 21 on the DC circuit board 10 and AC circuit board 5, making assembly very convenient. This signal transfer method achieves a separate design for the DC cavity 1-3 and the AC cavity 1-2, allowing for separate DC and AC assembly, improving product assembly efficiency.

[0025] In terms of shell assembly, such as Figure 2As shown, the tail cover 9 is first secured to the socket housing 1 via a snap-fit ​​structure and then secured to the socket housing 1 via screws 19. Four snaps 1-4 are provided on the outer side of the portion of the socket housing 1 that encloses the DC cavity 1-3, two of which are located on the upper side and the other two on the lower side. Ribs 1-5 extending forward and backward are provided on the left and right outer sides of the portion of the socket housing 1 that encloses the DC cavity 1-3, respectively. Ribs 1-5 are provided with screw mounting holes. Three snaps 1-4 are provided on the outer side of the portion of the socket housing 1 that encloses the AC cavity 1-2, respectively. One of which is located on the upper side and the other two are located on the left and right outer sides. Ribs 1-5 extending forward and backward are provided on the left and right outer sides of the portion of the socket housing 1 that encloses the AC cavity 1-2, respectively. Ribs 1-5 extending forward and backward are provided on the left and right outer sides of the portion of the socket housing 1 that encloses the AC cavity 1-2, respectively. A snap groove 9-1 and a lug 25 are correspondingly provided on the outer side surface of the front part of the tail cover 9, and a avoidance opening for avoiding the ridge 1-5 is provided on the front side of the lug 25. A screw through-hole is provided on the lug 25. When the tail cover 9 is buckled onto the rear part of the socket housing 1, the avoidance opening on the front part of the tail cover 9 avoids the ridge 1-5 of the socket housing 1, so that the tail cover 9 can move forward and be buckled onto the outer surface of the rear part of the socket housing 1. After the tail cover 9 and the socket housing 1 are fixed once by the snap structure, the lug 25 is aligned with the ridge 1-5, and the tail cover 9 and the socket housing 1 are fixed for a second time by the screw 19.

[0026] The integrated tail cover structure of the traditional charging socket signal conversion method usually requires six screws to achieve fixation with the socket housing. In the present invention, the tail cover 9 is fixed twice to the socket housing 1 through the combination of screws 19 and buckles 1-4, which not only reduces the number of screws, but also makes the tail cover assembly more convenient and ensures the reliability of fixation.

[0027] In the above embodiment, the buckles 1-4 are provided on the outer surface of the socket housing 1, and the buckle groove 9-1 is correspondingly provided on the tail cover 9. The buckles 1-4 snap into the buckle groove 9-1 to achieve a one-time fixation of the tail cover 9 and the socket housing 1. Providing the buckles 1-4 on the outer surface of the socket housing 1 makes it easier to form and set the buckles 1-4. Of course, in other embodiments, the buckles can also be provided on the inner side of the tail cover 9, and the buckle groove is correspondingly provided on the socket housing 1. When the tail cover 9 is buckled onto the rear end of the socket housing 1, the buckles on the inner side of the tail cover 9 snap into the buckle groove on the socket housing 1 to achieve a one-time fixation of the tail cover 9 and the socket housing 1. In addition, in other embodiments, the snap-fit ​​structure may not be provided, and the tail cover 9 and the socket housing 1 may be directly fixedly connected by a plurality of screws 19; or, the secondary fixation by screws 19 is no longer performed, and a positioning surface for positioning the installation position of the tail cover 9 on the socket housing 1 is provided on the socket housing 1, and the positioning surface limits the tail cover 9 from the front side so that the tail cover 9 cannot move forward, and at the same time, the snap-fit ​​1-4 is inserted into the snap-fit ​​groove 9-1 to prevent the tail cover 9 from moving backward, thereby fixing the tail cover 9 to the socket housing 1.

[0028] In terms of AC and DC terminal harness assembly, such as Figure 2 、 Figure 8 As shown, the tail cover 9 is provided with an AC power terminal mounting hole 9-2 and a DC power terminal mounting hole 9-3. The AC power terminal 3 and the DC power terminal 2 are respectively inserted into the AC power terminal mounting hole 9-2 and the DC power terminal mounting hole 9-3 from the rear end of the socket. The AC power terminal 3 has an AC terminal positioning surface 3-1 facing rearward, and the DC power terminal 2 has a DC terminal positioning surface 2-1 facing rearward. A plurality of forward-extending cantilever spring claws 22 are provided at intervals along the circumference at the front end openings of the AC power terminal mounting hole 9-2 and the DC power terminal mounting hole 9-3. Each cantilever spring claw 22 gradually tilts inward to form a closed structure at the front end. The diameter of the circle enclosed by all the cantilever spring claws 22 is smaller than the outer diameter of the AC terminal positioning surface 3-1 or the DC terminal positioning surface 2-1. After ultrasonic welding / crimping the wiring harness of the AC power terminal 3, insert it into the AC power terminal mounting hole 9-2 from the rear end of the socket. During the insertion process, the cantilever spring claw 22 is squeezed and stretched open. After the AC terminal positioning surface 3-1 passes over the cantilever spring claw 22, the cantilever spring claw 22 retracts and forms a stop with the AC terminal positioning surface 3-1 from the rear side, preventing the AC power terminal 3 from retreating. The AC power terminal 3 is fixed and the assembly efficiency is high. The assembly process of the DC power terminal 2 is similar to that of the AC power terminal 3 and will not be repeated here. In terms of sealing reliability, such as Figure 2 、 Figure 8As shown in the figure, the tail cover 9 and the socket housing 1 are sealed by two small sealing rings, namely the DC sealing ring 17 and the AC sealing ring 15, which replace the traditional large annular sealing structure of the integrated tail cover and the integrated cavity, thereby improving the sealing reliability of the product. Figure 2 、 Figure 8 As shown in , the DC sealing ring 17 and the AC sealing ring 15 each include an annular portion 23 and a limiting edge 24 connected to one end of the annular portion 23. The limiting edge 24 is clamped between the rear end face of the socket housing 1 and the tail cover 9 to position the sealing ring. The annular portion 23 is inserted into the interior of the socket housing 1 to form a seal with the inner wall of the socket housing 1. The DC sealing ring 17 and the AC sealing ring 15 form a radial seal with the inner wall of the socket housing 1. This radial seal replaces the traditional axial seal in which the sealing ring is clamped between the rear end face of the socket housing and the tail cover, further improving sealing reliability. Of course, this is only an optimized embodiment. In other embodiments, an axial sealing structure in which the DC sealing ring 17 and the AC sealing ring 15 are axially compressed between the tail cover 9 and the rear end face of the socket housing 1 can also be used.

[0029] In terms of DC and AC power terminal temperature measurement, such as Figure 5-6 As shown, two chip thermistors 13 are symmetrically welded on the DC circuit board 10 to measure the temperature of the DC power terminal 2. A flexible thermal pad 14 is provided on the chip thermistor 13, which can be a high thermal conductivity rubber pad, high thermal conductivity silicone pad, high thermal conductivity foam pad, etc. The flexible thermal pad 14 contacts the DC power terminal 2 for heat conduction, ensuring the heat conduction effect while avoiding friction damage to the terminal. The thermal contact surface of the flexible thermal pad 14 is an arc surface, so as to increase its contact area with the terminal and improve the temperature measurement accuracy. Figure 7 As shown, a large through-hole is provided in the center of the AC circuit board 5. Four chip thermistors 13 are spaced around this central through-hole to measure the temperature of the AC power terminals 3. Flexible thermal pads 14 are provided on the chip thermistors 13, which conduct heat through contact with the AC power terminals 3. The structure and mounting method of the chip thermistors 13 on the AC circuit board 5 are identical to those on the DC circuit board 10 and will not be repeated here. Connecting chip thermistors to circuit boards for signal transmission is a conventional technique and will not be described in detail here.

[0030] In addition, if Figure 7 As shown in the figure, the 3-pin connector 21 on the AC circuit board 5 is arranged at the lower position of the AC circuit board 5, and the low-voltage connector 6 on the AC circuit board 5 is a 10-pin connector, which is arranged at the upper position of the AC circuit board 5. The collected DC power terminal 2 temperature signal, AC power terminal 3 temperature signal and other low-voltage signals are led out through the low-voltage connector 6 on the AC circuit board 5.

[0031] The present invention realizes the signal transfer transmission between the DC circuit board temperature sensing signal and the AC circuit board by integrating the PIN pin signal transfer method in the socket housing, and can realize the split design of the AC and DC cavities, thereby improving the assembly and sealing reliability of the product.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A charging socket signal transfer method, characterized by: The invention comprises a socket housing (1), wherein the inner cavity of the socket housing (1) is divided into a DC cavity (1-3) and an AC cavity (1-2), a DC power terminal (2) and a DC circuit board (10) are installed in the DC cavity (1-3), and an AC power terminal (3) and an AC circuit board (5) are installed in the AC cavity (1-2), the DC and AC circuit boards are respectively connected with chip thermistors (13) for measuring the temperature of the DC and AC power terminals, the DC and AC circuit boards are respectively connected with multi-PIN connectors, and the AC circuit board (5) is also connected with a low-voltage connector (6), and the socket housing (1) is integrated with multi-PIN pins, and the two ends of the multi-PIN pins extend into the DC and AC cavities respectively and are plug-connected with the multi-PIN connectors of the DC and AC circuit boards, so that the temperature signal of the DC power terminal (2) is transmitted to the AC circuit board (5) through the multi-PIN connector of the DC circuit board (10), the multi-PIN pins, and the multi-PIN connector of the AC circuit board (5) in sequence and is led out through the low-voltage connector (6) of the AC circuit board (5).

2. The charging socket signal transfer method according to claim 1, characterized in that: The DC and AC cavities are arranged longitudinally along the socket housing (1), the DC cavity (1-3) is located on the lower side of the AC cavity (1-2), the multi-pin connector of the DC circuit board (10) is located on the upper part of the DC circuit board (10), and the multi-pin connector of the AC circuit board (5) is located on the lower part of the AC circuit board (5), so as to reduce the distance between the multi-pin connectors of the DC and AC circuit boards.

3. The charging socket signal transfer method according to claim 1, characterized in that: The multi-PIN plug and the socket housing (1) are injection molded into one piece.

4. The charging socket signal transfer method according to any one of claims 1 to 3, characterized in that: The multi-PIN plug is a 3-PIN plug (20), and the multi-PIN connector is a 3-PIN connector (21).

5. The charging socket signal transfer method according to any one of claims 1 to 3, characterized in that: The tail of the socket housing (1) is fixedly connected to a tail cover (9), and the tail cover (9) is fixed to the socket housing (1) once through a snap-fit ​​structure.

6. The charging socket signal transfer method according to claim 5, characterized in that: A snap fastener (1-4) is provided on the outer surface of the socket housing (1), and a snap fastener groove (9-1) is correspondingly provided on the tail cover (9). The snap fastener (1-4) is snapped into the snap fastener groove (9-1) to prevent the tail cover (9) from retreating, thereby achieving a one-time fixation of the tail cover (9) and the socket housing (1).

7. The charging socket signal transfer method according to claim 5, characterized in that: The tail cover (9) is fixed to the socket housing (1) for a secondary fixation via screws (19).

8. The charging socket signal transfer method according to any one of claims 1 to 3, characterized in that: The tail of the socket housing (1) is fixedly connected to a tail cover (9), and a seal is achieved between the tail cover (9) and the socket housing (1) via a sealing ring, wherein the sealing ring comprises a ring body (23) and a limiting edge (24) connected to one end of the ring body (23), and the limiting edge (24) is clamped between the rear end face of the socket housing (1) and the tail cover (9) to position the sealing ring, and the ring body (23) is inserted into the interior of the socket housing (1) to form a sealing fit with the inner cavity wall of the socket housing (1).

9. The charging socket signal transfer method according to any one of claims 1 to 3, characterized in that: The tail of the socket housing (1) is fixedly connected to a tail cover (9), and the tail cover (9) is provided with DC and AC power terminal mounting holes. The DC and AC power terminals are respectively inserted into the DC and AC power terminal mounting holes from the tail of the socket. The DC and AC power terminals both have rearward positioning surfaces. A plurality of cantilever spring claws (22) are provided at intervals along the circumferential direction at the front end openings of the DC and AC power terminal mounting holes. The diameter of the circle surrounded by the plurality of cantilever spring claws (22) is smaller than the outer diameter of the positioning surface of the DC and AC power terminals. The positioning surface passes over the cantilever spring claws (22) forward so that the cantilever spring claws (22) form a stop with the positioning surface from the rear side, thereby preventing the DC and AC power terminals from retreating.

10. The charging socket signal transfer method according to any one of claims 1 to 3, characterized in that: A flexible thermal pad (14) is provided on the chip thermistor (13), and heat is conducted through the flexible thermal pad (14) in contact with the DC and AC power terminals.

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