Temperature measuring structure of terminal

Abstract

The utility model discloses a terminal temperature measuring structure, which comprises a terminal, a temperature sensor and a temperature sensing support, the outer wall of the terminal is provided with a circumferential annular groove, the bottom wall of the annular groove is radially provided with a temperature measuring hole, the temperature sensor is arranged in the temperature measuring hole and is used for monitoring the temperature of the terminal, and the temperature sensing support is used for supporting the terminal. And the temperature sensing support comprises an elastic clamping ring with an opening, the elastic clamping ring is clamped on the annular groove in a shape matching manner, and at least part of the elastic clamping ring covers the temperature measuring hole, so that the temperature sensor is prevented from being separated from the temperature measuring hole. According to the utility model, the temperature sensor is fixed in the temperature measuring hole of the terminal through the temperature sensing bracket, so that the temperature sensor is in clearance fit with the temperature measuring hole of the terminal, and the temperature of the terminal is accurately monitored.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and more specifically to a temperature measurement structure of a terminal. Background Art

[0002] With the rapid development of new energy technology, the number of new energy vehicles is increasing. At present, the charging gun head and charging seat of new energy vehicles will have charging terminals with plug-in structures. When the car is charging, the current at the charging terminal increases rapidly and the heat generation increases sharply. Therefore, for safety reasons, many manufacturers will set up temperature measuring devices at the charging terminals. There are many ways to measure temperature. Only from the point of view of whether the measuring body is in contact with the measured medium, there are two major categories: contact temperature measurement and non-contact temperature measurement. For non-contact temperature measurement, since the temperature measuring element does not contact the measured medium, its temperature measurement range is very wide, and its upper limit of temperature measurement is not limited in principle. However, non-contact temperature measurement is affected by the emissivity of the object, the distance from the measured object to the temperature measuring element, smoke and water vapor and other media. Generally, the temperature measurement error is large, and the heat transfer through radiation heat has a long reaction time and a slow temperature measurement speed, which cannot meet many occasions requiring timeliness and accuracy of temperature measurement. Contact temperature measurement is simple, reliable, and has high measurement accuracy. However, there are two common problems. One is that there is no way to fix the temperature sensor after it contacts the terminal, and it is easy to detach from the terminal during use, resulting in the inability to monitor the temperature of the terminal in real time. The other problem is that the contact area between the temperature sensor and the terminal surface is insufficient, resulting in a gap between the measured temperature value and the actual temperature value.

[0003] Therefore, a new solution is urgently needed in the prior art to solve the above problems. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for the temperature measurement structure of the terminal to solve the problem that the temperature sensor has no fixing method after contacting the terminal and is easily detached from the terminal during use, resulting in the inability to monitor the temperature of the terminal in real time, and the problem that the contact area between the temperature sensor and the terminal surface is insufficient, resulting in a gap between the measured temperature value and the actual temperature value.

[0005] The utility model provides a temperature measurement structure of a terminal, comprising a terminal, a temperature sensor and a temperature sensing bracket, wherein the outer wall of the terminal is provided with a circumferential annular groove, the bottom wall of the annular groove is radially provided with a temperature measuring hole, the temperature sensor is arranged in the temperature measuring hole for monitoring the temperature of the terminal, and the temperature sensing bracket comprises an elastic clamping ring with an opening, the elastic clamping ring is clamped on the annular groove in a shape-matching manner, and at least partially covers the temperature measuring hole, thereby limiting the temperature sensor from detaching from the temperature measuring hole.

[0006] Optionally, a clamping structure is provided on the annular groove and the elastic clamping ring, and the elastic clamping ring is clamped on the annular groove in a shape matching manner, and is clamped and fixed to the annular groove via the clamping structure.

[0007] Optionally, the clamping structure is a clamping protrusion provided on one of the elastic clamping ring and the annular groove, and a clamping recess provided on the other, and the elastic clamping ring and the annular groove are clamped and fixed by the clamping protrusion and the clamping recess.

[0008] Optionally, there are two snap-fitting protrusions, which are symmetrically arranged on the inner wall close to the opening edge of the elastic snap-fitting ring relative to the central longitudinal section of the elastic snap-fitting ring, and the snap-fitting recess corresponds one-to-one to the snap-fitting protrusions and is arranged on the bottom wall of the annular groove.

[0009] Optionally, at least one circumferential reinforcing rib is provided on the elastic clamping ring at least at the outer wall corresponding to the temperature measuring hole.

[0010] Optionally, there are multiple reinforcing ribs, and the multiple reinforcing ribs are arranged at intervals along the axial direction of the elastic clamping ring.

[0011] Optionally, a through hole is provided on the elastic clamping ring at a position corresponding to the temperature measuring hole, and the temperature sensor further comprises a wire and a plug connected in sequence, and the wire passes through the through hole and is electrically connected to the plug.

[0012] Optionally, it also includes a circuit board, the circuit board is provided with a mounting hole, the terminal is matched and installed in the mounting hole, the circuit board is also provided with a socket, the plug and the socket are plugged into each other and electrically connected, a control module is integrated on the circuit board, the temperature sensor is electrically connected to the control module, and the temperature sensor sends the monitored temperature signal of the terminal to the control module through the wire.

[0013] Optionally, thermally conductive silicone is further included, the temperature measuring element and the temperature measuring hole are gap-matched, the thermally conductive silicone is filled in the gap, and the thermally conductive silicone is injection-molded in the gap through an integrated injection molding process.

[0014] Optionally, the ratio of the maximum width of the opening to the inner diameter of the elastic snap ring is 0.3-0.8.

[0015] The beneficial effects of the utility model are:

[0016] 1. The temperature sensor of the utility model is fixed in the temperature measuring hole of the terminal through a temperature sensing bracket. The temperature sensing bracket includes an elastic clamping ring with an opening. The elastic clamping ring is clamped on the annular groove with matching shape and covers the temperature measuring hole, thereby limiting the temperature sensor from being separated from the temperature measuring hole. The temperature sensor is fixed in the temperature measuring hole in real time and fits tightly with the side wall of the temperature measuring hole, with sufficient contact area for temperature measurement. The temperature signal of the terminal collected by the temperature sensor is closer to the actual temperature change and has a smaller error.

[0017] 2. Fill the gap between the temperature sensor and the temperature measuring hole with thermal conductive silicone. The thermal conductive silicone can strengthen the connection between the terminal temperature measuring hole and the temperature sensor, increase the effective contact area between the terminal temperature measuring hole and the temperature sensor, increase the adhesion, and avoid the reduction of the effective contact area due to vibration and the reduction of heat conduction efficiency due to the generation of air gaps.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 This is a schematic cross-sectional view of a temperature measurement structure of a terminal of the utility model;

[0021] Figure 2 This is a schematic diagram of the temperature measurement structure of a terminal of the utility model;

[0022] Figure 3 This is a schematic diagram of the exploded structure of a temperature measurement structure of a terminal of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the temperature sensing bracket of the utility model;

[0024] Figure 5 Another structural schematic diagram of a temperature measurement structure of a terminal of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the terminal of the utility model installed on a circuit board.

[0026] The following are marked in the figure:

[0027] 1. Terminal; 11. Annular groove; 111. Temperature measuring hole; 112. Snap-in depression; 2. Temperature sensor; 21. Wire; 22. Plug; 3. Temperature sensing bracket; 31. Snap-in protrusion; 32. Through hole; 33. Reinforcing rib; 4. Circuit board; 41. Socket. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0031] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0032] According to the first aspect of the present utility model, Figure 1-Figure 6 As shown, a temperature measurement structure of a terminal is provided, including a terminal 1, a temperature sensor 2 and a temperature sensing bracket 3, the outer wall of the terminal 1 is provided with a circumferential annular groove 11, the bottom wall of the annular groove 11 is radially provided with a temperature measuring hole 111, the temperature sensor 2 is arranged in the temperature measuring hole 111 for monitoring the temperature of the terminal 1, and the temperature sensing bracket 3 includes an elastic clamping ring with an opening, the elastic clamping ring is clamped on the annular groove 11 with a matching shape, and at least partially covers the temperature measuring hole 111, thereby limiting the temperature sensor 2 from detaching from the temperature measuring hole 111.

[0033] With the rapid development of new energy technology, the number of new energy vehicles is increasing. At present, the charging gun head and charging seat of new energy vehicles will have a plug-in structure terminal 1. When the car is charging, the current at terminal 1 increases rapidly and the heat generation increases sharply. Therefore, for safety reasons, many manufacturers will set a temperature measuring device at the charging terminal 1. There are many ways to measure temperature. Only from the point of view of whether the measuring body is in contact with the measured medium, there are two major categories: contact temperature measurement and non-contact temperature measurement. For non-contact temperature measurement, since the temperature measuring element does not contact the measured medium, its temperature measurement range is very wide, and its upper limit of temperature measurement is not limited in principle. However, non-contact temperature measurement is affected by the emissivity of the object, the distance from the measured object to the temperature measuring element, smoke and water vapor and other media. Generally, the temperature measurement error is large, and the heat transfer through radiation heat has a long reaction time and a slow temperature measurement speed, which cannot meet many occasions requiring timeliness and accuracy of temperature measurement. Contact temperature measurement is simple, reliable, and has high measurement accuracy. However, there are two common problems. One problem is that the temperature sensor 2 has no fixing method after contacting the terminal 1, and it is easy to detach from the terminal 1 during use, resulting in the inability to monitor the temperature of the terminal 1 in real time. The other problem is that the contact area between the temperature sensor 2 and the surface of the terminal 1 is insufficient, resulting in a gap between the measured temperature value and the actual temperature value.

[0034] The temperature sensor 2 of the utility model is fixed in the temperature measuring hole 111 of the terminal 1 by a temperature sensing bracket 3. The temperature sensing bracket 3 includes an elastic clamping ring with an opening. The elastic clamping ring is clamped on the annular groove 11 with matching shape and covers the temperature measuring hole 111, thereby limiting the temperature sensor 2 from being separated from the temperature measuring hole 111, so that the temperature sensor 2 is fixed in the temperature measuring hole 111 in real time and fits tightly with the side wall of the temperature measuring hole 111, with sufficient contact area for temperature measurement. The temperature signal of the terminal 1 collected by the temperature sensor 2 is closer to the actual temperature change and has a smaller error.

[0035] In some embodiments, Figure 3-Figure 4 As shown, a clamping structure is provided on the annular groove 11 and the elastic clamping ring, the elastic clamping ring is clamped on the annular groove 11 with matching shape, and is clamped and fixed to the annular groove 11 through the clamping structure.

[0036] The clamping structure can better fix the elastic clamping ring on the annular groove 11 of the terminal 1 to prevent it from detaching from the terminal 1 during use, causing the temperature sensor 2 to fall out of the temperature measuring hole 111 and fail to monitor the temperature of the terminal 1.

[0037] In some embodiments, Figure 4As shown, the clamping structure is a clamping protrusion 31 provided on one of the elastic clamping ring and the annular groove 11, and a clamping recess 112 provided on the other. The elastic clamping ring and the annular groove 11 are clamped and fixed by the clamping protrusion 31 and the clamping recess 112.

[0038] The engagement of the engaging protrusion 31 with the engaging recess 112 can better fix the elastic engaging ring on the annular groove 11 of the terminal 1 .

[0039] In some embodiments, Figure 3-Figure 4 As shown, there are two snap-fitting protrusions 31, and the two snap-fitting protrusions 31 are symmetrically arranged on the inner wall close to the opening edge of the elastic snap-fitting ring relative to the central longitudinal section of the elastic snap-fitting ring. The snap-fitting recess 112 corresponds one-to-one to the snap-fitting protrusions 31 and is arranged on the bottom wall of the annular groove 11.

[0040] The two symmetrically arranged snap-fitting protrusions 31 snap-fit ​​into the corresponding snap-fitting recesses 112 to snap-fit ​​and fix the elastic snap-fitting ring on the annular groove 11, which can more firmly clamp the annular groove 11 of the terminal 1 by the elastic snap-fitting ring, thereby fully ensuring that the temperature sensor 2 is always in close contact with the side wall of the temperature measuring hole 111, so that the real-time temperature signal of the terminal 1 collected by the temperature sensor 2 is closer to the actual temperature change and has a smaller error.

[0041] In some embodiments, Figure 4 As shown, at least one circumferential reinforcing rib 33 is provided on the elastic clamping ring at least at the outer wall corresponding to the temperature measuring hole 111.

[0042] The design of the reinforcing rib 33 can enhance the strength of the elastic clamping ring, and prevent the elastic clamping ring from being broken or damaged during the process of clamping the annular groove 11, thereby affecting its use.

[0043] In some embodiments, Figure 4 As shown, there are multiple reinforcing ribs 33, and the multiple reinforcing ribs 33 are arranged at intervals along the axial direction of the elastic clamping ring.

[0044] The design of multiple reinforcing ribs 33 can further enhance the overall structural strength of the elastic clamping ring and extend its service life.

[0045] In some embodiments, Figure 2-Figure 3 As shown, a through hole 32 is provided on the elastic clamping ring at a position corresponding to the temperature measuring hole 111 , and the temperature sensor 2 further includes a wire 21 and a plug 22 connected in sequence, and the wire 21 passes through the through hole 32 and is electrically connected to the plug 22 .

[0046] The wire 21 can conduct the temperature signal detected by the temperature sensor 2 .

[0047] In some embodiments, Figure 6 As shown, it also includes a circuit board, the circuit board 4 is provided with a mounting hole, the terminal 1 is matched and installed in the mounting hole, the circuit board 4 is also provided with a socket 41, the plug 22 and the socket 41 are plugged into and electrically connected, a control module is integrated on the circuit board 4, the temperature sensor 2 is electrically connected to the control module, and the temperature sensor 2 sends the monitored temperature signal of the terminal 1 to the control module through the wire 21.

[0048] In some embodiments, thermally conductive silicone is also included, the temperature measuring element and the temperature measuring hole 111 are gap-matched, the thermally conductive silicone is filled in the gap, and the thermally conductive silicone is injection-molded in the gap through an integrated injection molding process.

[0049] The gap between the temperature sensor and the temperature measuring hole 111 is filled with thermal conductive silicone. The thermal conductive silicone can strengthen the close fitting connection between the temperature measuring hole 111 of the terminal 1 and the temperature sensor 2, increase the effective contact area between the temperature measuring hole 111 and the temperature sensor 2, increase the adhesion, and avoid the reduction of the effective contact area due to vibration and the reduction of the heat conduction efficiency due to the generation of air gaps.

[0050] In some embodiments, Figure 5 As shown, the ratio of the maximum width d of the opening to the inner diameter D of the elastic snap ring is 0.3-0.8.

[0051] When the ratio of the maximum opening width d of the elastic snap ring to the inner diameter D of the elastic snap ring is less than 0.3, it is difficult to clamp the ring to the annular groove 11 due to the small opening, strong rigidity and insufficient elasticity, and the ring is easily broken due to excessive force during the clamping process.

[0052] When the ratio of the maximum opening width d of the elastic clamping ring to the inner diameter D of the elastic clamping ring is greater than 0.8, the annular groove 11 cannot be clamped due to the excessive opening, and it is easy to fall off the annular groove 11, which in turn causes the temperature sensor 2 to completely fall off or partially detach from the temperature measuring hole 111, and the real-time monitoring of the temperature of the terminal 1 cannot be guaranteed. When the temperature of the terminal 1 rises, it cannot be monitored, resulting in the risk of electricity use.

[0053] Therefore, the inventors prefer that the ratio of the maximum width d of the opening to the inner diameter D of the elastic snap ring is 0.3-0.8.

[0054] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A temperature measurement structure of a terminal, characterized in that: Including terminals, temperature sensors and temperature sensing brackets, The outer wall of the terminal is provided with a circumferential annular groove, and the bottom wall of the annular groove is radially provided with a temperature measuring hole. The temperature sensor is arranged in the temperature measuring hole to monitor the temperature of the terminal. The temperature sensing bracket includes an elastic clamping ring with an opening, and the elastic clamping ring is clamped on the annular groove in a matching shape and at least partially covers the temperature measuring hole, thereby limiting the temperature sensor from detaching from the temperature measuring hole.

2. A temperature measurement structure of a terminal according to claim 1, characterized in that: The annular groove and the elastic snap-fit ​​ring are provided with snap-fit ​​structures. The elastic snap-fit ​​ring is clamped on the annular groove in a shape-matched manner and is snap-fitted and fixed to the annular groove via the snap-fit ​​structure.

3. A temperature measurement structure of a terminal according to claim 2, characterized in that: The clamping structure is a clamping protrusion provided on one of the elastic clamping ring and the annular groove, and a clamping recess provided on the other one. The elastic clamping ring and the annular groove are clamped and fixed by the clamping protrusion and the clamping recess.

4. A temperature measurement structure of a terminal according to claim 3, characterized in that: There are two snap-fitting protrusions, which are symmetrically arranged on the inner wall close to the opening edge of the elastic snap-fitting ring relative to the central longitudinal section of the elastic snap-fitting ring. The snap-fitting recesses correspond one-to-one to the snap-fitting protrusions and are arranged on the bottom wall of the annular groove.

5. The temperature measurement structure of a terminal according to claim 1, characterized in that: At least one circumferential reinforcing rib is arranged on the elastic clamping ring at least at the outer wall corresponding to the temperature measuring hole.

6. A temperature measurement structure of a terminal according to claim 5, characterized in that: There are multiple reinforcing ribs, and the multiple reinforcing ribs are arranged at intervals along the axial direction of the elastic clamping ring.

7. The temperature measurement structure of a terminal according to claim 1, characterized in that: A through hole is arranged on the elastic clamping ring at a position corresponding to the temperature measuring hole. The temperature sensor further comprises a wire and a plug connected in sequence. The wire passes through the through hole and is electrically connected to the plug.

8. A temperature measurement structure of a terminal according to claim 7, characterized in that: It also includes a circuit board, which is provided with a mounting hole, and the terminal is matched and installed in the mounting hole. The circuit board is also provided with a socket, and the plug and the socket are plugged into each other and electrically connected. A control module is integrated on the circuit board, and the temperature sensor is electrically connected to the control module. The temperature sensor sends the monitored temperature signal of the terminal to the control module through the wire.

9. The temperature measurement structure of a terminal according to claim 1, characterized in that: It also includes thermally conductive silicone, the temperature sensor and the temperature measuring hole are gap-matched, the thermally conductive silicone is filled in the gap, and the thermally conductive silicone is injection-molded in the gap through an integrated injection molding process.

10. The temperature measurement structure of a terminal according to claim 1, characterized in that: The ratio of the maximum width of the opening to the inner diameter of the elastic snap ring is 0.3-0.8.

Images