Charging plug for new energy electric vehicle

Abstract

The utility model discloses a charging plug for a new energy electric automobile, which comprises a plug inner frame, the plug inner frame is provided with a ground wire terminal fixing groove, a zero line terminal fixing groove and a live wire terminal fixing groove, a ground wire terminal of the charging plug is connected in the ground wire terminal fixing groove, a zero line terminal of the charging plug is connected in the zero line terminal fixing groove, and a live wire terminal of the charging plug is connected in the live wire terminal fixing groove. A live wire terminal of the charging plug is connected in the live wire terminal fixing groove; between the live wire terminal fixing groove and the zero wire terminal fixing groove, the plug inner frame is provided with a temperature sensor positioning hole, and a temperature sensor of the plug is arranged in the temperature sensor positioning hole. The power line plug is compact in internal design structure and small in occupied space; and the plug is reasonable in internal design, easy to form and low in cost, so that the charging plug is low in cost.

Description

Technical Field

[0001] This utility model relates to the field of power cord plug technology, specifically to a charging plug for new energy electric vehicles. Background Technology

[0002] The power source for new energy electric vehicles is the battery, which requires frequent charging. To ensure the safety of electric vehicles during charging, traditional electric vehicle charging power cord plugs have built-in temperature sensors. The temperature is monitored by the real-time resistance feedback from the temperature sensor. As the charging plug heats up during charging, the control box automatically disconnects when the temperature reaches a certain value, breaking the circuit. However, this method also has some drawbacks. For example, with the added temperature sensor, it cannot be directly connected to the current-carrying wire; it can only be connected to the signal wire. This requires adding a signal wire inside the power cord. In the production process, the addition of the temperature sensor and riveting terminals reduces production efficiency and increases production costs. Furthermore, if the temperature sensor is positioned too far from the current-carrying wire, the monitored temperature may be inaccurate, posing a safety hazard during charging. Utility Model Content

[0003] The purpose of this invention is to provide a charging plug for new energy electric vehicles. This plug has its terminals positioned within a fixed groove, facilitating injection molding and improving socket assembly efficiency. The plug also incorporates a built-in temperature sensor located in a corresponding fixed groove on the inner frame of the plug. The temperature sensor is fixed between the crimping areas of the live and neutral wire terminals, allowing for precise sensing of the plug's internal temperature and enhancing the charging safety of new energy electric vehicles.

[0004] To achieve the above-mentioned technical objectives, the technical solution of this utility model is as follows:

[0005] A charging plug for a new energy electric vehicle includes an inner frame. The inner frame is provided with a ground terminal fixing slot, a neutral terminal fixing slot, and a live terminal fixing slot. The ground terminal of the charging plug is connected to the ground terminal fixing slot, the neutral terminal of the charging plug is connected to the neutral terminal fixing slot, and the live terminal of the charging plug is connected to the live terminal fixing slot. Between the live terminal fixing slot and the neutral terminal fixing slot, the inner frame is provided with a temperature sensor positioning hole, and the temperature sensor of the plug is installed in the temperature sensor positioning hole.

[0006] The temperature sensor is a cylindrical temperature sensor, which is arranged along the axial direction of the live wire terminal. By aligning the cylindrical temperature sensor parallel to both the live and neutral wire terminals, the detection range of the temperature sensor is increased, allowing for accurate sensing of the internal temperature of the plug and improving the charging safety of new energy electric vehicles.

[0007] The ground terminal fixing groove is provided with a ground hole protrusion, and the ground terminal is provided with a ground hole. The ground hole protrusion of the ground terminal fixing groove is connected to the ground hole of the ground terminal.

[0008] The grounding terminal is cylindrical, and the grounding terminal fixing groove is provided with an arc-shaped retaining wall. By partially surrounding the cylindrical grounding terminal with the arc-shaped retaining wall, the cylindrical grounding terminal is blocked, which can prevent the grounding terminal from being skewed, displaced, or deformed, thereby improving the installation effect and efficiency of the grounding terminal.

[0009] The neutral wire terminal fixing slot and / or the live wire terminal fixing slot are provided with a limiting mechanism. The limiting mechanism includes a terminal (neutral wire terminal and / or live wire terminal) and a terminal fixing slot (neutral wire terminal fixing slot and / or live wire terminal fixing slot). The side wall of the terminal fixing slot is provided with a side wall protrusion, which limits the terminal within the terminal fixing slot. When the terminal is placed in the terminal fixing slot, the side wall protrusion blocks the terminal to prevent the terminal from detaching from the opening of the terminal fixing slot.

[0010] The sidewall protrusion is provided on the deformable part of the terminal fixing slot. When the terminal is placed into the terminal fixing slot, the terminal pushes the sidewall protrusion, and the deformable part can deform, causing the sidewall protrusion to retract so that the terminal can be locked into the terminal fixing slot. By providing a deformable part, the protrusion can retract to avoid this obstruction, making it easier and more convenient for operators to assemble terminals, thus improving production efficiency.

[0011] At the deformation section, the inner frame of the plug is provided with a deformation gap. The deformation gap is used to make way for the deformation section so that the deformation section can deform and the side wall protrusion can be pushed back.

[0012] The terminal fixing groove is a square groove.

[0013] The terminal is provided with a limiting groove, and the terminal fixing groove engages with the limiting groove. By engaging the terminal fixing groove with the limiting groove, the terminal can be limited to prevent vertical displacement, thereby improving the stability of the terminal connection and facilitating the subsequent installation of the charging plug.

[0014] The plug inner frame is provided with a first riveting terminal positioning hole and a second riveting terminal positioning hole. The temperature sensor includes a first temperature sensor lead and a second temperature sensor lead. The first temperature sensor lead is connected to the first signal line core through the first riveting terminal, which is located in the first riveting terminal positioning hole. The second temperature sensor lead is connected to the second signal line core through the second riveting terminal, which is located in the second riveting terminal positioning hole. After being fitted with double-layer heat-shrink tubing, the two riveting terminals are respectively installed in corresponding fixing slots on the plug inner frame. In this wiring method, the temperature sensor is not directly connected in series with the live wire and the neutral wire. The advantage of this design is that it does not have high requirements for the current and voltage that the temperature sensor can withstand; it only needs to maintain conduction under a low voltage of 3V, thereby directly reducing the development cost of the temperature sensor. The effect of rapid power-off is achieved by controlling the resistance value received by the control box, which plays a good role in ensuring the safety performance of the charging plug of new energy electric vehicles during the charging process.

[0015] The charging plug works as follows: when the temperature exceeds the standard requirements, the resistance of the temperature sensor inside the plug increases. When the control box receives the high resistance, it automatically disconnects the power supply, and the device stops charging. When the temperature returns to normal, the resistance of the temperature sensor inside the plug is within the standard range. When the control box receives the resistance value within the standard range, it restores power and starts charging normally.

[0016] The beneficial effects of this utility model are:

[0017] 1. The plug has a cylindrical temperature sensor inside, which is fixed between the live wire and neutral wire terminals to accurately sense the temperature inside the plug.

[0018] 2. The plug's inner frame is designed with a raised grounding hole and an arc-shaped retaining wall to prevent displacement and deformation of the grounding terminal. The open design makes it easy to assemble the grounding terminal into the designated position, making the operation simple and the assembly efficiency high.

[0019] 3. The inner frame is designed with limiting mechanisms for the live and neutral terminals, and its open design allows for easy assembly of the live and neutral terminals, preventing them from easily coming loose once assembled, effectively avoiding terminal detachment issues. The deformation gap of the inner frame provides elasticity to the components on both sides of the live and neutral terminal fixing slots, making it easier and more convenient for operators to assemble the live and neutral terminals, thus improving production efficiency.

[0020] 4. The power cord plug has an attractive design, taking into account people's requirements for plug use, enhancing the feel and making it easy to plug and unplug.

[0021] 5. The power cord plug has a compact internal design that takes up little space and is cleverly designed.

[0022] 6. The plug has a reasonable internal design, is easy to mold, and takes cost into account, making this charging plug low in cost. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is an exploded view of the charging plug.

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the plug's inner frame.

[0026] Figure 3 This is a schematic diagram of the planar structure of the plug's inner frame.

[0027] Figure 4 This is a first-view structural diagram of the internal terminal crimping of the charging plug.

[0028] Figure 5 This is a schematic diagram of the second-view structure of the internal terminal crimping of the charging plug.

[0029] Figure 6 A first-view structural diagram of the inner frame assembly of the plug.

[0030] Figure 7 A schematic diagram of the second-view structure for assembling the inner frame of the plug.

[0031] Figure 8 This is a structural diagram of the injection mold for a charging plug.

[0032] Figure 9 This is a diagram of the injection-molded external structure of the charging plug. Detailed Implementation

[0033] like Figure 1-9 As shown, a charging plug for a new energy electric vehicle includes a cable 3 and a plug housing 7. The cable 3 includes a ground wire core 3E, a live wire core 3L, a neutral wire core 3N, a first signal wire core 3S, and a second signal wire core 3C. The ground wire core 3E is riveted to a ground terminal 4. The live wire core 3L is riveted to a live terminal 6. The neutral wire core 3N is riveted to a neutral terminal 5. The temperature sensor 8 is a cylindrical temperature sensor, which includes a first temperature sensor lead 9 and a second sensor lead 10. The first signal wire core 3S is riveted to the first temperature sensor lead 9 through a first riveting terminal 11. The first riveting terminal 11 is fitted with a first double-wall heat shrink tubing 12. The second signal wire core 3C is riveted to the second temperature sensor lead 10 through a second riveting terminal 13. The second riveting terminal 13 is fitted with a second double-wall heat shrink tubing 14.

[0034] Both the square neutral terminal 5 and the square live terminal 6 are provided with limiting grooves, such as... Figure 1As shown, the neutral terminal 5 has a limiting groove 51. The cylindrical ground terminal 4 is provided with a ground hole 41.

[0035] like Figure 2-3 As shown, the plug inner frame 7 is provided with a ground terminal fixing groove 15, a live terminal fixing groove 16, a neutral terminal fixing groove 17, a second riveting terminal positioning hole 18, a first riveting terminal positioning hole 19, and a temperature sensor positioning hole 20. The temperature sensor positioning hole 20 is located between the live terminal fixing groove 16 and the neutral terminal fixing groove 17. The temperature sensor is inserted into the temperature sensor positioning hole 20, the first riveting terminal 11 is inserted into the first riveting terminal positioning hole 19, and the second riveting terminal 13 is inserted into the second riveting terminal positioning hole 18.

[0036] The grounding terminal fixing groove 15 includes a semi-circular arc-shaped enclosure wall 22 and a grounding hole protrusion 21 within the groove. The grounding terminal 4 is installed within the arc-shaped enclosure wall 22, and the grounding hole protrusion 21 passes through the grounding hole 41. By partially surrounding the cylindrical grounding terminal and the grounding hole protrusion 21 with the arc-shaped enclosure wall, the cylindrical grounding terminal is limited, which can prevent the grounding terminal from tilting, displacing, or deforming, thereby improving the installation effect and efficiency of the grounding terminal.

[0037] Both the live wire terminal fixing slot 16 and the neutral wire terminal fixing slot 17 are square slots, and limit mechanisms are provided at the openings of both slots. Figure 3 As shown, taking the live wire terminal fixing slot 16 as an example, the limiting mechanism includes a side wall protrusion 23 on the side wall of the live wire terminal fixing slot 16. The side wall protrusion 23 is disposed on the deformable part 24. On the back of the deformable part 24, the plug inner frame 7 is provided with a deformation gap 25. When the limiting slot on the live wire terminal 6 is inserted into the square slot, the live wire terminal 6 squeezes the side wall protrusion 23, and the deformable part 24 deforms and makes way towards the deformation gap 25 so that the live wire terminal 6 can be inserted into the live wire terminal fixing slot 16. After the live wire terminal 6 is inserted into the live wire terminal fixing slot 16, since the plug inner frame 7 is engaged in the limiting slot of the live wire terminal 6, the live wire terminal 6 is limited vertically. Since the live wire terminal 6 is disposed in the square slot, the reset side wall protrusion 23 abuts against the opening of the square slot, thereby limiting the live wire terminal 6 laterally to prevent the live wire terminal 6 from detaching from the plug inner frame at the opening of the slot. The limiting mechanism of the neutral terminal fixing slot 17 adopts the same principle design as the live terminal fixing slot 16, and the limiting mechanism of the neutral terminal fixing slot 17 will not be described in detail here.

[0038] The charging plug includes an inner plug mold 2 and an outer plug mold 1. The inner plug frame is set inside the inner plug mold 2, and the inner plug mold 2 is set inside the outer plug mold 1. The outer plug mold 1 is provided with an outer mold mesh tail rib 1S.

[0039] Assembly steps:

[0040] 1. According to the design requirements, strip the outer sheath of cable 3, and then strip the core wires of ground wire 3E, live wire 3L, neutral wire 3N, first signal wire 3S and second signal wire 3C, controlling the exposed length of copper wires. After stripping, confirm a second time that the dimensions are suitable and meet the requirements.

[0041] 2. Connect the ground wire core 3E and the ground terminal 4 together by crimping.

[0042] 3. Connect the live wire core 3L and the live wire terminal 6 together by crimping.

[0043] 4. Connect the neutral wire core 3N and the neutral terminal 5 together by crimping.

[0044] 5. Connect the first signal line core 3S and the first temperature sensor lead 9 together through the first riveting terminal 11.

[0045] 6. The first double-wall heat shrink tubing 12 is fitted onto the first riveting terminal 11 to provide insulation.

[0046] 7. Connect the second signal line core 3C and the second temperature sensor lead 10 together through the second riveting terminal 13. Cover the second double-wall heat shrink tubing 14 on the second riveting terminal 13 to achieve the effect of insulation.

[0047] 8. Insert the crimped ground terminal 4 into the ground terminal fixing slot 15 of the plug inner frame 7, insert the crimped live terminal 6 into the live terminal fixing slot 16 of the plug inner frame 7, and then insert the crimped neutral terminal 5 into the neutral terminal fixing slot 17 of the plug inner frame 7.

[0048] 9. Insert the crimped first riveting terminal 11 into the first riveting terminal positioning hole 19 of the plug inner frame 7, insert the crimped second riveting terminal 13 into the second riveting terminal positioning hole 18 of the plug inner frame 7, and then insert the temperature sensor 8 into the temperature sensor positioning hole 20 of the plug inner frame 7.

[0049] 10. After confirming that everything is correct, proceed with plug injection molding. First, perform inner mold injection molding, then perform outer mold injection molding. After injection molding is completed, check whether the corresponding dimensions and appearance meet the requirements according to the drawings, and whether the safety dimensions meet the requirements.

[0050] The beneficial effects of this charging plug are:

[0051] 1. The plug has a cylindrical temperature sensor inside, which is fixed in the middle of the crimping area of ​​the live wire and neutral wire terminals, and can accurately sense the temperature inside the plug.

[0052] 2. The plug's inner frame is designed with a raised grounding hole and a semi-circular arc-shaped retaining wall to prevent displacement and deformation of the grounding terminal. The open design makes it easy to assemble the grounding terminal into the designated position, making the operation simple and the assembly efficiency high.

[0053] 3. The inner frame is designed with limiting mechanisms for the live and neutral terminals, and its open design allows for easy assembly of the live and neutral terminals, preventing them from easily coming loose once assembled, effectively avoiding terminal detachment issues. The deformation gap of the inner frame provides elasticity to the components on both sides of the live and neutral terminal fixing slots, making it easier and more convenient for operators to assemble the live and neutral terminals, thus improving production efficiency.

[0054] 4. The power cord plug has an attractive design, taking into account people's requirements for plug use, enhancing the feel and making it easy to plug and unplug.

[0055] 5. The power cord plug has a compact internal design that takes up little space and is cleverly designed.

[0056] 6. The plug has a reasonable internal design, is easy to mold, and takes cost into account, making this charging plug low in cost.

[0057] The above embodiments do not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A charging plug for new energy electric vehicles, characterized in that: The device includes an inner frame for the plug, which has a ground terminal fixing slot, a neutral terminal fixing slot, and a live terminal fixing slot. The ground terminal of the charging plug is connected to the ground terminal fixing slot, the neutral terminal of the charging plug is connected to the neutral terminal fixing slot, and the live terminal of the charging plug is connected to the live terminal fixing slot. Between the live terminal fixing slot and the neutral terminal fixing slot, the inner frame for the plug has a temperature sensor positioning hole, and the temperature sensor of the plug is located in the temperature sensor positioning hole.

2. The charging plug for a new energy electric vehicle according to claim 1, characterized in that: The ground terminal fixing groove is provided with a ground hole protrusion, and the ground terminal is provided with a ground hole. The ground hole protrusion of the ground terminal fixing groove is connected to the ground hole of the ground terminal.

3. A charging plug for a new energy electric vehicle according to claim 1, characterized in that: The grounding terminal is cylindrical, and the grounding terminal fixing groove is provided with an arc-shaped retaining wall.

4. A charging plug for a new energy electric vehicle according to claim 1, characterized in that: The neutral wire terminal fixing slot and / or the live wire terminal fixing slot are provided with a limiting mechanism. The limiting mechanism includes a terminal and a terminal fixing slot. The side wall of the terminal fixing slot is provided with a side wall protrusion, which limits the terminal within the terminal fixing slot.

5. A charging plug for a new energy electric vehicle according to claim 4, characterized in that: The sidewall protrusion is provided on the deformable part of the terminal fixing groove.

6. A charging plug for a new energy electric vehicle according to claim 5, characterized in that: At the deformation section, the inner frame of the plug is provided with a deformation gap.

7. A charging plug for a new energy electric vehicle according to claim 4, characterized in that: The terminal is provided with a limiting groove, and the terminal fixing groove is engaged with the limiting groove.

8. A charging plug for a new energy electric vehicle according to claim 1, characterized in that: The plug inner frame is provided with a first riveting terminal positioning hole and a second riveting terminal positioning hole. The temperature sensor includes a first temperature sensor lead and a second temperature sensor lead. The first temperature sensor lead is connected to the first signal line core through the first riveting terminal, and the first riveting terminal is located in the first riveting terminal positioning hole. The second temperature sensor lead is connected to the second signal line core through the second riveting terminal, and the second riveting terminal is located in the second riveting terminal positioning hole.

9. A charging plug for a new energy electric vehicle according to claim 1, characterized in that: The temperature sensor is a cylindrical temperature sensor, which is arranged along the axial direction of the live wire terminal.

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