An internal circuit connection structure of a charging gun and the charging gun

Abstract

The utility model relates to a kind of internal wiring connection structure and charging gun of charging gun, and the internal wiring connection structure of charging gun includes FPC and the terminal block of the communication inside and outside charging gun, several pins are provided in the terminal block;First connection area, second connection area and wiring area are equipped on the FPC, the first connection area is located in one end of FPC, the second connection area is located in the other end of FPC, and the wiring area is located between first connection area and second connection area;The first connection area is equipped with several first soldering pads, the second connection area is equipped with several gold fingers for connecting the internal control panel of charging gun, and the wiring area is equipped with several connecting lines, the connecting line connects first soldering pad and gold finger;The pin is one-to-one corresponding with first soldering pad and is welded and fixed;At least the connecting line is covered with shielding film.The utility model has the advantages of good flexibility and not easy to cause interference, and is very suitable for the use of small space inside charging gun cavity.

Description

Technical Field

[0001] This utility model relates to the field of charging gun technology, and in particular to an internal circuit connection structure for a charging gun and a charging gun. Background Technology

[0002] The (handheld) charging gun is a detachable charging interface for connecting new energy vehicles to charging piles. To facilitate handheld use, charging guns are often designed to be miniaturized, which limits the internal installation space. In the past, the connection between the charging gun head (signal transmission part) and the main board (located inside the charging gun) was usually achieved using cables or rigid boards. Rigid board connections have poor flexibility, while cable connections are prone to interference due to the short cable length and large cross-sectional area. Utility Model Content

[0003] The purpose of this utility model is to provide an internal circuit connection structure and a charging gun that is flexible and not prone to interference, making it very suitable for use in the narrow space inside the charging gun.

[0004] To achieve the above objectives, this utility model discloses an internal circuit connection structure for a charging gun, comprising an FPC and a terminal block connecting the inside and outside of the charging gun. The terminal block has a plurality of pins. The FPC is provided with a first connection area, a second connection area, and a wiring area. The first connection area is located at one end of the FPC, the second connection area is located at the other end of the FPC, and the wiring area is located between the first connection area and the second connection area. The first connection area is provided with a plurality of first solder pads, the second connection area is provided with a plurality of gold fingers for connecting to the internal control board of the charging gun, and the wiring area is provided with a plurality of connecting wires, the connecting wires connecting the first solder pads and the gold fingers. The pins correspond one-to-one with the first solder pads and are soldered and fixed. At least the connecting wires are covered with a shielding film.

[0005] After the above settings, the terminal block of the charging gun, i.e., the control board inside the charging gun, is connected via an FPC. This method occupies little space, and the FPC's excellent bending performance allows it to adapt well to the confined space inside the charging gun, minimizing the risk of damage to the wiring. The shielding film effectively reduces signal interference caused by the charging current.

[0006] Preferably, the FPC also includes a heat dissipation area, with the first connection area, the second connection area, and the wiring area located around the heat dissipation area, which is connected to the housing of the charging gun. Positioning the heat dissipation area in the middle of the FPC and connecting it to the housing of the charging gun provides good heat dissipation for the FPC.

[0007] Preferably, the FPC has a partial hollowed-out section at the edge of the heat dissipation area to form a three-sided suspended heat dissipation connecting plate, which is connected to the outer shell of the charging gun. With this configuration, the heat dissipation connecting plate has a certain degree of independent movement relative to the FPC, facilitating its connection with the charging gun's outer shell.

[0008] Preferably, a heat conductor is connected to the heat dissipation connecting plate, and the heat dissipation connecting plate is connected to the outer shell of the charging gun through the heat conductor. By adding a heat conductor, the heat dissipation connecting plate does not require special processing, which is beneficial for the production of PFC, and the FPC is less prone to damage and easier to maintain.

[0009] Preferably, the heat conductor is made of a conductive material; the heat conductor is connected to the ground on the charging gun. With this configuration, the heat dissipation connecting plate can also serve as an auxiliary shield.

[0010] Preferably, the heat dissipation connecting plate is provided with a first reinforcing plate. This arrangement is to improve the strength of the heat dissipation area, thereby extending the service life of the FPC.

[0011] Preferably, the FPC has a second reinforcing sheet in part or all of the area corresponding to the first connection area, and a third reinforcing sheet in part or all of the area corresponding to the second connection area. This arrangement improves the strength of the first and second connection areas, thereby extending the service life of the FPC. It also facilitates the connection between the pins and the first pad, and the insertion of the gold fingers into the internal control board of the charging gun.

[0012] Preferably, the FPC has at least one positioning hole, and the terminal block has positioning posts that correspond to and fit the positioning holes one by one, with the positioning holes and positioning posts engaging in a plug-in fit. By providing positioning holes, the soldering of pins to pads can be facilitated.

[0013] Preferably, one end of the FPC's gold finger is provided with a limiting flange for engaging with the internal control board of the charging gun. This design prevents the gold finger from being damaged due to excessive pressure when it is connected to the internal control board of the charging gun (interlocked with the edge connector of the control board).

[0014] Preferably, one end of the FPC with gold fingers has a marking line to indicate that the gold fingers are properly inserted. The marking line informs the assembler that the gold fingers are properly connected.

[0015] Preferably, the FPC has copper layers on both sides, one of which is etched to form the first pad, connecting lines, and gold fingers. With this configuration, the copper layer without the first pad, etc., can be used as a shielding layer.

[0016] This utility model also discloses a charging gun, which adopts the above-mentioned internal circuit connection structure of the charging gun; the charging gun includes a shell and a control board, the shell is provided with an installation port communicating with the inside and outside, and the terminal block is connected to the installation port; the FPC and the control board are both located in the inner cavity of the shell, and the gold fingers are connected to the control board.

[0017] This utility model has the following beneficial effects: This invention uses an FPC (Flexible Printed Circuit) to connect the terminal block of the charging gun, which is also the control board inside the charging gun. This design occupies little space, and the FPC's excellent bending performance minimizes interference with the charging gun's internal structure, allowing it to adapt well to the limited space inside the charging gun. This provides flexibility in wiring and reduces the risk of damage to the wiring. The shielding film effectively reduces signal interference caused by the charging current. The heat dissipation area is located in the center of the FPC and connected to the charging gun's outer shell, providing excellent heat dissipation for the FPC. Furthermore, the charging gun using this connection structure can be designed to be more compact and is easier to assemble. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of Example 1.

[0019] Figure 2 This is a schematic diagram of the terminal block in Embodiment 1.

[0020] Figure 3 This is a schematic diagram of the partitioning of FPC in Implementation Example 1.

[0021] Figure 4 This is a schematic diagram of the first side of the FPC in Embodiment 1.

[0022] Figure 5 This is a schematic diagram of the second side of the FPC in Embodiment 1.

[0023] Figure 6 This is a schematic diagram of the connection between the first pad, the connecting line, and the gold finger in Embodiment 1.

[0024] Figure 7 This is a schematic diagram of Example 2.

[0025] Note: This is for easy viewing. Figure 1 and Figure 4 The connecting wires are hidden inside; Figure 6 The image only shows a portion of the connection relationships between the first pad, the connector, and the gold fingers; Figure 7 The internal structure of the charging gun, excluding the control board, FPC, and terminal block, is not shown.

[0026] Explanation of symbols for main components: Terminal block 10, pin 11, positioning post 12; FPC20, first connection area 21, second connection area 22, wiring area 23, heat dissipation area 24, first pad 25, connecting line 26, gold finger 27, shielding film 28, positioning hole 29, limiting flange 2a, marking line 2b, first reinforcing piece 2c, second reinforcing piece 2d, third reinforcing piece 2e, heat dissipation connecting piece 2f; Casing 31, control board 32. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Example 1 like Figure 1-6 As shown, this embodiment discloses an internal wiring connection structure for a charging gun, which includes an FPC 20 and a terminal block 10. The terminal block 10 is generally secured to the outer casing 31 of the charging gun with screws. The terminal block 10 is an interface connecting the inside and outside of the charging gun, and has several pins 11. The terminal block 10 connects to the internal control board 32 of the charging gun via the FPC 20, thereby realizing electrical and / or communication connections.

[0029] The FPC 20 is provided with a first connection area 21, a second connection area 22, a wiring area 23, and a heat dissipation area 24. The first connection area 21 is located at one end of the FPC 20, and the second connection area 22 is located at the other end of the FPC 20. The wiring area 23 and the heat dissipation area 24 are located between the first connection area 21 and the second connection area 22, and the first connection area 21, the second connection area 22, and the wiring area 23 are located on the outer periphery of the heat dissipation area 24. In this case, copper layers are provided on both sides of the FPC 20, which are the first side and the second side, respectively.

[0030] The first connection area 21 has several first pads 25, and the edge of the second connection area 22 has several gold fingers 27 for connecting to the internal control board 32 of the charging gun. The wiring area 23 has several connecting lines 26, which connect the first pads 25 and the gold fingers 27. The first pads 25, connecting lines 26, and gold fingers 27 are generally arranged in a one-to-one correspondence, but one connecting line 26 can correspond to multiple gold fingers 27, depending on the actual circuit design. In this case, the first pads 25, connecting lines 26, and gold fingers 27 are all etched from the copper layer on the first surface of the FPC 20. The retention of the copper layer on the second surface of the FPC 20 can play a role in shielding and anti-interference. The copper layer on the second surface of the FPC 20 is removed or circled at the position corresponding to the first pads 25 to ensure that the pins 11 can accurately connect to the corresponding first pads 25 when passing through the PFC. The pins 11 correspond one-to-one with the first pads 25 and are soldered and fixed.

[0031] To ensure the shielding effect, at least the connecting line 26 is covered with a shielding film 28. The shielding film 28 can cover the area of ​​the first side of the FPC20 except for the location of the gold finger 27. The first connection area 21 can be covered with the shielding film 28 after the first solder pad 25 and the pin 11 are soldered.

[0032] To facilitate the connection between the pin 11 and the first pad 25, at least one positioning hole 29 is provided in the first connection area 21 of the FPC 20, and a positioning post 12 corresponding to and adapted to the positioning hole 29 is provided on the terminal block 10. The positioning hole 29 and the positioning post 12 are inserted and engaged. In addition, a second reinforcing piece 2d is provided in part or all of the area corresponding to the first connection area 21 of the FPC 20 to ensure that the first connection area 21 has good strength, which is beneficial to the connection between the pin 11 and the first pad 25.

[0033] To ensure a reliable connection between the gold finger 27 and the internal control board 32 of the charging gun, a limiting flange 2a is provided at one end of the FPC 20 where the gold finger 27 is located, for limiting its engagement with the internal control board 32 of the charging gun. This prevents the gold finger 27 from being damaged due to excessive pressure when it is connected to the internal control board 32 (inserted into the edge connector of the control board 32). Additionally, a marking line 2b is provided at one end of the FPC 20 where the gold finger 27 is located to indicate that the gold finger 27 is properly inserted, informing the assembly personnel that the gold finger 27 is correctly connected. Furthermore, a third reinforcing piece 2e is provided in part or all of the second connection area 22 of the FPC 20 to give the second connection area 22 better strength and facilitate insertion.

[0034] The heat dissipation area 24 connects to the outer shell 31 of the charging gun. Preferably, the FPC 20 has a partially hollowed-out section at the edge of the heat dissipation area 24, forming a three-sided suspended heat dissipation connecting plate 2f. A heat conductor is welded onto this heat dissipation connecting plate 2f. Additionally, to improve the strength of the heat dissipation connecting plate 2f, a first reinforcing plate 2c is also provided on it. The heat dissipation connecting plate 2f connects to the outer shell 31 of the charging gun via the heat conductor. More specifically, it is preferable to connect to the grounding point on the outer shell 31 of the charging gun, and it is even better if the heat conductor is made of a conductive material. The heat conductor can connect the unused copper layer area on the first surface of the FPC 20 and the copper layer on the second surface of the FPC 20. Copper is an excellent thermal conductor; this arrangement facilitates the overall heat dissipation of the FPC 20 and also provides good grounding, thereby improving the shielding effect. The heat dissipation connecting plate 2f has a certain degree of independent movement relative to the FPC 20, which facilitates its connection.

[0035] Example 2 like Figure 7As shown, this embodiment discloses a charging gun, which adopts the internal circuit connection structure of Embodiment 1. The charging gun includes a housing 31 and a control board 32. The housing 31 is provided with a mounting port that connects the inside and outside. The terminal block 10 is connected to the mounting port by screws. The FPC 20 and the control board 32 are both located in the inner cavity of the housing 31. The gold fingers 27 are connected to the edge connector on the control board 32.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An internal circuit connection structure for a charging gun, characterized in that: The device includes an FPC and a terminal block connecting the inside and outside of the charging gun. The terminal block has a plurality of pins. The FPC has a first connection area, a second connection area, and a wiring area. The first connection area is located at one end of the FPC, the second connection area is located at the other end of the FPC, and the wiring area is located between the first connection area and the second connection area. The first connection area has a plurality of first pads, the second connection area has a plurality of gold fingers for connecting to the internal control board of the charging gun, and the wiring area has a plurality of connecting wires. The connecting wires connect the first pads and the gold fingers. The pins correspond one-to-one with the first pads and are soldered and fixed. At least the connecting wires are covered with a shielding film.

2. The internal circuit connection structure of the charging gun according to claim 1, characterized in that: The FPC is also provided with a heat dissipation area. The first connection area, the second connection area and the wiring area are located on the periphery of the heat dissipation area, and the heat dissipation area is connected to the outer shell of the charging gun.

3. The internal circuit connection structure of the charging gun according to claim 2, characterized in that: The FPC has a partial hollowed-out section at the edge of the heat dissipation area to form a heat dissipation connecting plate that is suspended on three sides. The heat dissipation connecting plate is connected to the outer shell of the charging gun.

4. The internal circuit connection structure of the charging gun according to claim 3, characterized in that: A heat-conducting element is connected to the heat dissipation connecting plate, and the heat dissipation connecting plate is connected to the outer shell of the charging gun through the heat-conducting element.

5. The internal circuit connection structure of the charging gun according to claim 4, characterized in that: The heat conductor is made of a conductive material; the heat conductor is connected to the ground on the charging gun housing; and a first reinforcing plate is provided on the heat dissipation connecting plate.

6. The internal circuit connection structure of the charging gun according to claim 1, characterized in that: The FPC is provided with a second reinforcing sheet in part or all of the first connection area, and the FPC is provided with a third reinforcing sheet in part or all of the second connection area.

7. The internal circuit connection structure of the charging gun according to claim 1, characterized in that: The FPC is provided with at least one positioning hole, and the terminal block is provided with positioning pins that correspond to and are adapted to the positioning holes. The positioning holes and positioning pins are inserted and engaged.

8. The internal circuit connection structure of the charging gun according to claim 1, characterized in that: The FPC has a limiting protrusion at one end for engaging with the internal control board of the charging gun; the FPC also has a marking line at one end for indicating that the gold finger is properly inserted.

9. The internal circuit connection structure of the charging gun according to claim 1, characterized in that: The FPC has copper layers on both sides, and one of the copper layers is etched to obtain the first pad, the interconnect line, and the gold finger.

10. A charging gun, characterized in that: The charging gun adopts the internal circuit connection structure of any one of claims 1-9; the charging gun includes a housing and a control board, the housing is provided with an installation port communicating with the inside and outside, and the terminal block is connected to the installation port; the FPC and the control board are both located in the inner cavity of the housing, and the gold fingers are connected to the control board.

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