Temperature measuring structure, charging device and motor vehicle

Abstract

The present invention relates to the field of electrical connections, and specifically to a temperature measuring structure, a charging device, and a motor vehicle. The structure comprises a bracket and a temperature measuring element, wherein the bracket has a first surface, an area for accommodating the temperature measuring element is provided on the first surface, and the temperature measuring element has a temperature measuring surface, wherein the temperature measuring surface at least partially protrudes from the first surface, and the temperature measuring surface forms a variable angle with the first surface. The present invention can tightly fit the temperature measuring surface of the temperature measuring element to the object to be measured, and can achieve a certain pressure on the object to be measured without the aid of additional devices, so that the temperature measuring element measures the temperature data closest to the actual temperature of the object to be measured, so that the staff or the corresponding processor can understand the temperature of the object to be measured more timely and accurately, and avoid the situation where the temperature measuring surface and the object to be measured are separated during the subsequent use of the temperature measuring element.

Description

Technical Field

[0001] The present invention relates to the field of electrical connection, in particular to a temperature measuring structure, a charging device and a motor vehicle. Background Art

[0002] Current charging guns and charging docks for new energy vehicles feature plug-in charging terminals that are secured to the terminal holders of the gun or dock. When the vehicle is charging, the current at the charging terminals increases rapidly, generating a sharp increase in heat. Therefore, for safety reasons, many manufacturers install temperature measuring devices at the charging terminals. Contact temperature measuring devices are simple, reliable, and offer high accuracy. However, the temperature measuring device must be in contact with the medium being measured to measure temperature. After installation, the charging terminal must maintain a certain pressure against the temperature measuring device to accurately measure the terminal temperature.

[0003] The current installation method of the temperature measuring device is to install the charging terminal and then fit the charging terminal and the temperature measuring device together. However, since there is no pressure between the charging terminal and the temperature measuring device, there are actually many tiny gaps in the fitting area, resulting in the inability to accurately measure the temperature of the charging terminal. The temperature control system cannot adjust the temperature of the charging system in time, resulting in excessive temperature rise in the charging system and causing charging failure.

[0004] Therefore, there is an urgent need in the prior art for a temperature measuring structure in which a temperature measuring device is in close contact with a measured medium and accurately measures the temperature of the measured medium. Summary of the Invention

[0005] In order to enable the charging terminal to immediately exert pressure against the temperature sensor after installation, the present invention provides a temperature measuring structure, including a bracket and a temperature measuring element. The bracket has a first surface, an area for accommodating the temperature measuring element is provided on the first surface, and the temperature measuring element has a temperature measuring surface, which at least partially protrudes from the first surface, and the temperature measuring surface forms a variable angle with the first surface.

[0006] In some embodiments, the angle between the temperature measuring surface and the first surface is 1°-27°.

[0007] In some embodiments, the height of the temperature measuring surface protruding from the first surface is 1%-30% of the thickness of the temperature measuring element.

[0008] In some embodiments, the region is provided with a groove, and the temperature measuring element is at least partially accommodated in the groove.

[0009] In some embodiments, the bracket further has a first end surface, and the groove extends through the first end surface.

[0010] In some embodiments, a card slot is further provided on the first end surface, and the card slot is located on both sides of the groove.

[0011] In some embodiments, one end of the temperature measuring element has two opposite rotating shafts, and the rotating shafts are located in the slot.

[0012] In some embodiments, the temperature measuring element has two opposite second surfaces, and the rotating shaft is perpendicularly arranged on each of the second surfaces.

[0013] In some embodiments, the temperature measuring element has a second end surface, the second end surface is provided with the rotation axis, and the rotation axis extends perpendicular to the second surface.

[0014] In some embodiments, the card slot has a third surface, and the third surface is a surface parallel to the first surface and has the shortest distance therebetween.

[0015] In some embodiments, a distance from the first surface to the edge of the rotating shaft is smaller than a distance from the first surface to the third surface.

[0016] In some embodiments, the distance from the first surface to the edge of the rotating shaft is 0.5 times to 0.8 times the distance from the first surface to the third surface.

[0017] In some embodiments, the rotating shaft is elastic.

[0018] In some embodiments, the groove has a bottom surface, a claw is provided on the bottom surface, and the claw has a hook, and the hook protrudes from the bottom surface.

[0019] In some embodiments, the hook has a limiting surface, and the limiting surface is perpendicular to the bottom surface, or the angle between the limiting surface and the bottom surface is acute.

[0020] In some embodiments, the temperature measuring element has a second end surface, and the limiting surface contacts the second end surface to limit the temperature measuring element from being separated from the groove.

[0021] In some embodiments, the claw is elastic, so that the hook does not protrude from the bottom surface under the action of external force.

[0022] In some embodiments, the cross-sectional shape of the temperature measuring element perpendicular to the temperature measuring surface is a rectangle, a quadrilateral, or a polygon.

[0023] In some embodiments, the width of the groove is greater than or equal to the widest part of the temperature measuring element parallel to the temperature measuring surface.

[0024] In some embodiments, the cross-sectional shape of the rotating shaft is circular, elliptical, flat, triangular, rectangular, quadrilateral or polygonal.

[0025] In some embodiments, the temperature measuring element is an NTC temperature sensor or a PTC temperature sensor.

[0026] In some embodiments, the temperature measuring element is a bimetallic temperature sensor.

[0027] In some embodiments, when the external temperature changes by 1° C., the deformation of the metal of the bimetallic temperature sensor is less than or equal to 1 mm.

[0028] In some embodiments, the temperature measuring element has a metal shell, and the material of the metal shell contains silver or copper.

[0029] The present invention also discloses a charging device, which includes an object to be measured and the above-mentioned temperature measurement structure.

[0030] In some embodiments, when the charging device is assembled, the temperature measuring element is in contact with the object to be measured, the temperature measuring surface is in contact with the object to be measured and applies pressure to the object to be measured, and the temperature measuring element measures the temperature of the object to be measured.

[0031] In some embodiments, the contact area between the temperature measuring surface and the object to be measured accounts for 0.1%-95% of the surface area of ​​the object to be measured.

[0032] In some embodiments, the contact area between the temperature measuring surface and the object to be measured accounts for 1%-85% of the surface area of ​​the object to be measured.

[0033] In some embodiments, the pressure applied by the temperature measuring surface to the object to be measured is 5N-98N.

[0034] The present invention also provides a motor vehicle, which includes the temperature measurement structure described above or the charging device described above.

[0035] The beneficial effects of the present invention are:

[0036] 1. The temperature measuring structure provided by the present invention can tightly fit the temperature measuring surface of the temperature measuring element and the object to be measured. Without the help of additional devices, the temperature measuring surface can apply a certain pressure to the object to be measured, so that the temperature measuring element measures the temperature data closest to the actual temperature of the object to be measured, so that the staff or the corresponding processor can understand the temperature of the object to be measured more timely and accurately, and avoid the situation where the temperature measuring surface of the temperature measuring element is separated from the object to be measured during subsequent use, or the temperature measuring surface and the object to be measured cannot be continuously fitted together, resulting in inaccurate temperature measurement.

[0037] 2. The temperature measuring structure provided by the present invention breaks the conventional practice of first setting the temperature measuring surface parallel to the plane of the object to be measured and then fitting them together. Instead, the temperature measuring surface protrudes from the temperature measuring structure and forms a certain variable angle with the plane of the object to be measured. As a result, the object to be measured flattens the temperature measuring surface and generates a relative reaction force, so that relative pressure exists between the temperature measuring surface and the object to be measured, making the fit tighter and more accurate in measuring the actual temperature of the object to be measured.

[0038] 3. By setting the claws, external force can be applied to deform the claws without removing the object to be measured, so that the hook on the claws does not protrude from the bottom surface. At this time, the temperature measuring element can be taken out of the bracket. In the subsequent equipment maintenance and replacement of the temperature measuring element, it can reduce the process, save time, and facilitate the operation of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0040] Figure 1 Schematic diagram of the structure of the temperature measuring element in an embodiment of the present invention.

[0041] Figure 2 Schematic diagram of the structure of the bracket in an embodiment of the present invention.

[0042] Figure 3 Schematic diagram of a temperature measurement structure in an embodiment of the present invention.

[0043] Figure 4 Schematic diagram of another structure of the temperature measurement structure in an embodiment of the present invention.

[0044] Figure 5 Schematic diagram of the cross-sectional structure of the clamping claw in an embodiment of the present invention.

[0045] Figure 6 Schematic diagram of another structure of the temperature measurement structure in an embodiment of the present invention.

[0046] In the figure,

[0047] 1-temperature measuring element; 11-temperature measuring surface; 12-second surface; 13-rotating shaft; 14-second end surface.

[0048] 2-bracket; 21-first surface; 22-groove; 23-first end surface; 24-slot; 25-third surface; 26-bottom surface; 27-claw; 28-hook; 29-limiting surface.

[0049] 3- Object to be measured. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] Example 1

[0052] The present invention provides a temperature measurement structure, such as Figure 1-Figure 5 As shown, it includes a bracket 2 and a temperature measuring element 1. The bracket 2 has a first surface 21. A groove 22 for accommodating the temperature measuring element 1 is provided on the first surface 21. The temperature measuring element 1 has a temperature measuring surface 11. The temperature measuring surface 11 at least partially protrudes from the first surface 21. The temperature measuring surface 11 and the first surface 21 form a variable angle.

[0053] During specific implementation, when the temperature measuring element 1 is placed in the groove, the temperature measuring surface 11 protrudes from the first surface 21, and the temperature measuring surface 11 of the temperature measuring element 1 is at a variable angle to the first surface 21 located on the bracket 2. After the object 3 to be measured is installed, the object 3 to be measured can contact the temperature measuring surface 11, and since the temperature measuring surface 11 and the first surface 21 are at a certain angle in the initial state, an interaction force is generated between the object 3 to be measured and the temperature measuring surface 11, which can make the temperature measuring surface 11 of the temperature measuring element 1 tightly and continuously adhere to the surface of the object 3 to be measured, so that the temperature measuring element 1 measures the temperature data closest to the actual temperature for the object 3 to be measured, so that the staff or the corresponding processor can understand the temperature of the object 3 to be measured more timely and accurately, and avoid the situation where the temperature measuring surface 11 and the object 3 to be measured are separated during the subsequent use of the temperature measuring element 1, or the temperature measuring surface 11 and the object 3 to be measured cannot be continuously adhered to, resulting in inaccurate temperature measurement.

[0054] The temperature measuring structure in this embodiment breaks the conventional practice of first setting the temperature measuring surface parallel to the plane of the object to be measured and then fitting them together. Instead, the temperature measuring surface protrudes from the temperature measuring structure and forms a certain variable angle with the plane of the object to be measured. As a result, the object to be measured flattens the temperature measuring surface and generates a relative reaction force, so that relative pressure exists between the temperature measuring surface and the object to be measured, making the fit closer and more accurate in measuring the actual temperature of the object to be measured.

[0055] In one embodiment, the angle between the temperature measuring surface 11 and the first surface 21 is 1°-27°. Since the temperature measuring surface 11 of the temperature measuring element 1 is tightly and continuously attached to the surface of the object to be measured 3 during the final assembly, the temperature measuring element 1 is squeezed by the object to be measured 3, causing the angle between the temperature measuring surface 11 and the first surface 21 to become smaller. The temperature measuring element 1 relies on the reaction force of the interference between the rotating shaft 13 and the third surface 25 to cause the temperature measuring surface 11 to apply pressure to the object to be measured 3. The greater the angle change, the greater the applied pressure.

[0056] In order to verify the influence of the angle between the temperature measuring surface 11 and the first surface 21 on the pressure applied by the temperature measuring surface 11 to the object 3 to be measured, and the temperature drift value of the temperature of the object 3 to be measured by the temperature measuring element 1, the inventors selected brackets 2 of the same size and specifications, the same temperature measuring element 1, and different angles between the temperature measuring surface 11 and the first surface 21. The inventors tested the pressure applied when the angle between the temperature measuring surface 11 and the first surface 21 was pressed to 0°, and the temperature drift value of the temperature of the object 3 to be measured by the temperature measuring element 1, and recorded them in Table 1.

[0057] The pressure is measured using a precision push-pull force gauge, with the measuring end touching the highest end of the temperature measuring surface 11, and then the angle between the temperature measuring surface 11 and the first surface 21 is pressed from the initial angle to 0°, and the value displayed on the precision push-pull force gauge is read.

[0058] The temperature drift measurement method uses a separate precision temperature sensor, precisely attached to the object under test 3. If necessary, apply thermal grease to the attachment surface for more accurate temperature measurement. The temperature displayed by the precision temperature sensor and the temperature measuring element 1 are read at different angles between the temperature measuring surface 11 and the first surface 21. The difference is then taken as the absolute value, which represents the temperature drift at the current angle.

[0059] In this embodiment, a pressure range of 5N-98N is acceptable. Too little pressure prevents the temperature measuring surface 11 from fitting tightly against the object 3 under test, while excessive pressure can damage the temperature measuring element 1. A temperature drift value of less than 10K is acceptable. A temperature drift value greater than 10K results in a significant difference between the actual temperature of the object 3 under test and the temperature measured by the temperature measuring element 1, making it impossible to accurately reflect the actual temperature of the object 3 under test. Consequently, the temperature control system cannot adjust the system temperature in a timely manner, resulting in excessive temperature rise and malfunction.

[0060] Table 1: Effect of the angle between the temperature measuring surface and the first surface on the pressure exerted by the temperature measuring surface on the object being measured and the temperature drift value

[0061]

[0062] As can be seen from Table 1, when the angle between the temperature measuring surface 11 and the first surface 21 is greater than 27°, the pressure applied when the angle between the temperature measuring surface 11 and the first surface 21 is pressed to 0° exceeds 98N. At this time, the pressure on the temperature measuring element 1 is too large and it is very easy to cause damage. When the angle between the temperature measuring surface 11 and the first surface 21 is less than 1°, the pressure applied when the angle between the temperature measuring surface 11 and the first surface 21 is pressed to 0° is less than 5N. At this time, the temperature measuring surface 11 and the object 3 cannot fit tightly together, and the actual temperature of the object 3 cannot be accurately measured. In addition, when the angle between the temperature measuring surface 11 and the first surface 21 is pressed to 0°, the temperature drift value of the temperature of the object 3 measured by the temperature measuring element 1 is greater than 10K. At this time, the actual temperature of the object 3 is significantly different from the temperature measured by the temperature measuring element 1, and the actual temperature of the object 3 cannot be reflected in a timely manner. The larger the angle, the smaller the temperature drift. This contradicts popular belief. Temperature measurement is not more accurate when the contact surfaces are parallel. Instead, the angle of the contact surfaces varies. After flattening, relative pressure creates a smaller gap between the contact surfaces, minimizing the temperature drift. Therefore, the inventors set the angle between the temperature measurement surface 11 and the first surface 21 to between 1° and 27°.

[0063] In one embodiment, the height of the temperature measuring surface 11 protruding from the first surface 21 is 1%-30% of the thickness of the temperature measuring element 1. To verify the effect of the height of the temperature measuring surface 11 protruding from the first surface 21 on the pressure applied by the temperature measuring surface 11 to the object 3 under test, as well as the temperature drift of the object 3 measured by the temperature measuring element 1, the inventors selected brackets 2 of the same dimensions and the same temperature measuring element 1, but with different heights of the temperature measuring surface 11 protruding from the first surface 21. They tested the pressure applied when the angle between the temperature measuring surface 11 and the first surface 21 was reduced to 0°, as well as the temperature drift of the object 3 measured by the temperature measuring element 1, and recorded the results in Table 2.

[0064] The pressure is measured using a precision push-pull force gauge, with the measuring end touching the highest end of the temperature measuring surface 11, and then the angle between the temperature measuring surface 11 and the first surface 21 is pressed from the initial angle to 0°, and the value displayed on the precision push-pull force gauge is read.

[0065] The temperature drift measurement method uses a separate precision temperature sensor, precisely attached to the object under test 3. If necessary, apply thermal grease to the attachment surface for more accurate temperature measurement. The temperature displayed by the precision temperature sensor and the temperature measuring element 1 are read at different angles between the temperature measuring surface 11 and the first surface 21. The difference is then taken as the absolute value, which represents the temperature drift at the current angle.

[0066] In this embodiment, a pressure range of 5N-98N is acceptable. Too little pressure prevents the temperature measuring surface 11 from fitting tightly against the object 3 under test, while excessive pressure can damage the temperature measuring element 1. A temperature drift value of less than 10K is acceptable. A temperature drift value greater than 10K results in a significant difference between the actual temperature of the object 3 under test and the temperature measured by the temperature measuring element 1, making it impossible to accurately reflect the actual temperature of the object 3 under test. Consequently, the temperature control system cannot adjust the system temperature in a timely manner, resulting in excessive temperature rise and malfunction.

[0067] Table 2: Influence of the height of the temperature measuring surface protruding from the first surface on the pressure exerted by the temperature measuring surface on the object being measured and the temperature drift value

[0068]

[0069] Table 2 shows that when the height of the temperature measuring surface 11 protruding from the first surface 21 accounts for more than 30%, the pressure applied when the angle between the temperature measuring surface 11 and the first surface 21 is reduced to 0° exceeds 98N. At this time, the pressure on the temperature measuring element 1 is too great, which can easily cause damage. When the height of the temperature measuring surface 11 protruding from the first surface 21 accounts for less than 1%, the pressure applied when the angle between the temperature measuring surface 11 and the first surface 21 is reduced to 0° is less than 5N. At this time, the temperature measuring surface 11 and the object 3 cannot be tightly fitted, and the actual temperature of the object 3 cannot be accurately measured. In addition, when the angle between the temperature measuring surface 11 and the first surface 21 is reduced to 0°, the temperature drift value of the temperature of the object 3 measured by the temperature measuring element 1 is greater than 10K. At this time, the actual temperature of the object 3 is significantly different from the temperature measured by the temperature measuring element 1, and the actual temperature of the object 3 cannot be timely reflected. Therefore, the inventors set the height of the temperature measuring surface 11 protruding from the first surface 21 to be 1%-30% of the thickness of the temperature measuring element 1.

[0070] In some embodiments, the area is provided with a groove, and the temperature measuring element is at least partially accommodated in the groove. That is, the area on the first surface accommodating the temperature measuring element is groove-shaped, or part of it is groove-shaped, and the temperature measuring element can be arranged in the groove.

[0071] In one embodiment, the bracket 2 further has a first end surface 23, and the groove 22 extends through the first end surface 23. The temperature measuring element 1 can be installed and placed in the groove 22 and pressed into the groove 22 by the object to be measured 3. If the groove 22 does not have other openings, when the temperature measuring element 1 is damaged, the object to be measured 3 must be removed before the temperature measuring element 1 can be removed and replaced. Therefore, a through opening for the groove 22 is provided on the first end surface 23. The temperature measuring element can be installed and repaired through this through opening, without having to dismantle the entire temperature measuring structure, saving maintenance time and avoiding secondary damage to the object to be measured 3.

[0072] In addition, the temperature measuring element 1 also needs a data line to connect with the corresponding control unit, and the data line can also be led out from this through-hole, without the need for drilling or other processing on the bracket 2, reducing the processing steps, reducing processing time, and saving processing costs.

[0073] Furthermore, a slot 24 is provided on the first end surface 23, and the slots 24 are located on both sides of the groove 22. The slots 24 are recessed downward on the first end surface 23 to facilitate placement of the rotating shaft 13 of the temperature measuring element 1.

[0074] Furthermore, one end of the temperature measuring element 1 has two opposing rotating shafts 13, which are located in the slots 24. The temperature measuring element 1 has the rotating shafts 13 and is located in the slots 24, so that the temperature measuring element 1 can rotate about the rotating shafts 13, so that the temperature measuring surface 11 and the first surface 21 form a variable angle.

[0075] Furthermore, the temperature measuring element 1 has two opposing second surfaces 12, on which the rotating shaft 13 is perpendicularly disposed. The rotating shaft 13 is disposed on the second surface 12 and is located at one end of the temperature measuring element 1, so that the rotating shaft 13 can be conveniently disposed on the second surface 12, and installation is also simple and quick.

[0076] Furthermore, the temperature measuring element 1 has a second end surface 14, on which a rotation shaft 13 is disposed. The rotation shaft 13 extends perpendicular to the second surface 12. When it is inconvenient to dispose the rotation shaft 13 on the second surface 12, the rotation shaft 13 can be disposed on the second end surface 14 of the temperature measuring element 1. The rotation shaft 13 can be axially parallel to the second end surface 14 and attached to the second end surface 14, or it can be disposed perpendicular to the second end surface 14 and connected by a bend, extending in a direction perpendicular to the second surface 12.

[0077] Furthermore, the slot 24 has a third surface 25 , which is parallel to and shortest from the first surface 21 . The slot 24 is recessed downward on the first end surface 23 , forming the third surface 25 near the first surface 21 .

[0078] Furthermore, the distance from the first surface 21 to the edge of the rotating shaft 13 is smaller than the distance from the first surface 21 to the third surface 25 .

[0079] Furthermore, the distance from the first surface 21 to the edge of the rotating shaft 13 is 0.5 times to 0.8 times the distance from the first surface 21 to the third surface 25 .

[0080] Furthermore, the rotating shaft 13 is elastic.

[0081] In a specific implementation, a third surface 25 is provided on the card slot 24, and the third surface 25 is a surface parallel to the first surface 21 and the distance between the two is the shortest. The distance from the first surface 21 to the edge of the rotating shaft 13 is smaller than the distance from the first surface 21 to the third surface 25, and the rotating shaft 13 is elastic. At this time, the temperature measuring element 1 can be made into a regular rectangular parallelepiped or cube shape. When installing the temperature measuring element 1, the rotating shaft 13 can be placed into the card slot 24 in an inclined manner relative to the first end face 101, and the temperature measuring element 1 is completed to enter the groove 22 through the first end face 101. At this time, due to the contact between the rotating shaft 13 and the third surface 25 and the stress generated, the temperature measuring surface 11 is at a certain angle relative to the first surface 21. After the object to be measured 3 is installed, the object to be measured 3 abuts against the temperature measuring surface 11 and the temperature measuring surface is aligned with the temperature measuring surface. 11 generates pressure. Since the rotating shaft 13 is elastic, when the object to be measured contacts the temperature measuring surface 11 and generates pressure on the temperature measuring surface 11, the rotating shaft 13 contacts the third surface 25 and generates stress, causing the rotating shaft 13 to deform. Since the rotating shaft 13 is elastic, in the process of the rotating shaft 13 trying to restore from the deformed shape or position to the shape or position before deformation, the temperature measuring surface 11 of the temperature measuring element 1 applies a certain pressure to the object to be measured 3, so that the two can fit more closely and continuously, so that the temperature measuring element 1 can measure the temperature of the object to be measured 3 more accurately. With this structural setting, the temperature measuring surface 11 of the temperature measuring element 1 is difficult to separate from the surface of the object to be measured 3 when the position of the object to be measured 3 does not change, and the temperature measuring element 1 will not fall out of the groove 22 during use.

[0082] In order to verify the effect of the ratio of the distance from the first surface 21 to the edge of the rotating shaft 13 to the distance from the first surface 21 to the third surface 25 on the angle between the temperature measuring surface 11 and the first surface 21, and the temperature drift value of the temperature of the object 3 measured by the temperature measuring element 1, the inventors selected the same bracket 2 with the same distance from the first surface 21 to the third surface 25, and selected different temperature measuring elements 1 with different distances from the first surface 21 to the edge of the rotating shaft 13. During the test, the rotating shafts 13 of different temperature measuring elements 1 were placed in the slots 24. When the temperature measuring element 1 could not move relative to the first surface 21, the angle between the temperature measuring surface 11 and the first surface 21 was measured. An angle of 1° to 27° was qualified. As well as the temperature drift value of the temperature of the object under test 3 measured by the temperature measuring element 1, a temperature drift value less than 10K is a qualified value. If the temperature drift value is greater than 10K, the actual temperature of the object under test 3 is significantly different from the temperature measured by the temperature measuring element 1, and the actual temperature of the object under test 3 cannot be reflected in time. The temperature control system cannot adjust the temperature of the system in time, resulting in excessive temperature rise of the system and causing functional failure.

[0083] Table 3. The ratio of the distance from the first surface 21 to the edge of the rotating shaft 13 to the distance from the first surface 21 to the third surface 25, and its influence on the angle between the temperature measuring surface 11 and the first surface 21 and the temperature drift value.

[0084]

[0085] According to Table 3, when the ratio of the distance from the first surface 21 to the edge of the rotating shaft 13 to the distance from the first surface 21 to the third surface 25 is greater than 0.9, the angle between the temperature measuring surface 11 and the first surface 21 is less than 1°. In this case, the angle between the temperature measuring surface 11 and the first surface 21 is unqualified, and the temperature drift value of the temperature of the object under test 3 measured by the temperature measuring element 1 is also greater than 10K, which is unqualified. When the distance from the first surface 21 to the edge of the rotating shaft 13 accounts for less than 0.5 times the distance from the first surface 21 to the third surface 25, the angle between the temperature measuring surface 11 and the first surface 21 is greater than 27°. At this time, the temperature measuring structure is unqualified. When the distance from the first surface 21 to the edge of the rotating shaft 13 accounts for 0.5 to 0.8 times the distance from the first surface 21 to the third surface 25, the angle between the temperature measuring surface 11 and the first surface 21 is between 1° and 27°, and when the proportion is greater than 0.8 times, the temperature drift value of the temperature of the object under test 3 measured by the temperature measuring element 1 is unqualified. Therefore, the inventor sets the distance from the first surface 21 to the edge of the rotating shaft 13 to 0.5-0.8 times the distance from the first surface 21 to the third surface 25.

[0086] In one embodiment, the groove 22 has a bottom surface 26 , a claw 27 is provided on the bottom surface 26 , and the claw 27 has a hook 28 , which protrudes from the bottom surface 26 .

[0087] Furthermore, the hook 28 has a limiting surface 29 , and the limiting surface 29 is perpendicular to the bottom surface 26 , or the angle between the limiting surface 29 and the bottom surface 26 is an acute angle.

[0088] Furthermore, the temperature measuring element 1 has a second end surface 14 , and the limiting surface 29 contacts the second end surface 14 to limit the temperature measuring element 1 from being separated from the groove 22 .

[0089] During specific implementation, a claw 27 is provided on the bottom surface 26, and a hook 28 is provided on the claw 27. The hook 28 is provided with a limiting surface 29 which is perpendicular to the bottom surface 26 or forms an acute angle with the bottom surface. The second end surface 14 of the temperature measuring element 1 can be brought into contact with the limiting surface 29 to limit the temperature measuring element 1 from being separated from the groove 22. The temperature measuring element 1 can be fixed more firmly in the groove 22 to prevent the temperature measuring element 1 from being separated from the groove 22. The temperature measuring structure can be used in more environments as needed.

[0090] Furthermore, the claw 27 is elastic, so that the hook does not protrude from the bottom surface under the action of external force.

[0091] In specific implementation, by applying external force to the elastic claws, the temperature measuring element 1 can be easily removed without moving the object to be measured, which makes it convenient to replace the temperature measuring element 1 as needed, reduces the process and saves time.

[0092] In a specific implementation, the shape of the cross section of the temperature measuring element 1 perpendicular to the temperature measuring surface 11 is not particularly limited, as long as the temperature measuring element 1 can enter the groove 22 through the first surface 21 .

[0093] In one embodiment, the cross-section of the temperature measuring element 1 perpendicular to the temperature measuring surface 11 is rectangular, quadrilateral or polygonal. It can be designed into different shapes as needed to match the actual use environment.

[0094] In one embodiment, the width of the groove 22 is greater than or equal to the widest part of the temperature measuring element 1 parallel to the temperature measuring surface.

[0095] In a specific implementation, the width of the groove 22 is greater than or equal to the widest part of the temperature measuring element 1 parallel to the temperature measuring surface, as long as the temperature measuring element 1 can enter the groove 22 through the first surface 21 .

[0096] In one embodiment, the cross-sectional shape of the rotating shaft 13 is circular, oval, flat, triangular, rectangular, quadrilateral, or polygonal. The cross-sectional shape of the rotating shaft 13 can be configured into various cross-sectional shapes according to the different shapes of the temperature measuring element 1 and the different processing methods of the rotating shaft 13, so as to facilitate matching and connecting with the groove 22.

[0097] In one embodiment, the temperature measuring element 1 is an NTC temperature sensor or a PTC temperature sensor.

[0098] In a specific implementation, the temperature measuring element 1 is an NTC temperature sensor or a PTC temperature sensor. These two types of temperature sensors offer the advantages of being compact and capable of measuring gaps that other thermometers cannot. They are also easy to use, with resistance values ​​​​selectable between 0.1 and 100 kΩ. They are also easily processed into complex shapes and can be mass-produced. They offer excellent stability and a strong overload capacity, making them suitable for applications such as adapters, which require compact size and stable performance.

[0099] In some embodiments, the temperature measuring element 1 is a bimetallic temperature sensor. A bimetallic temperature sensor is made of two metals with different expansion coefficients. When the temperature changes, the metal with a larger expansion coefficient bends. This sensor has good vibration resistance and is suitable for use in electric vehicles.

[0100] Furthermore, when the external temperature changes by 1°C, the deformation of the metal in the bimetallic temperature sensor is less than or equal to 1mm. The smaller the deformation of a bimetallic temperature sensor, the more accurate its temperature measurement. Therefore, the inventors selected a bimetallic temperature sensor with a deformation of less than or equal to 1mm.

[0101] The smaller the metal's deformation, the closer the temperature measured by the bimetallic temperature sensor is to the true value. To verify the relationship between metal deformation and measured temperature, the inventors conducted relevant tests. The test method set the temperature of the object under test 3 to the same temperature, used the same bracket, and selected bimetallic temperature sensors with different metal deformations. The temperature values ​​measured under different conditions were recorded and the absolute value of the difference between the measured temperature and the true temperature was calculated. A value of 0.2°C or less was considered acceptable. The results are shown in Table 4.

[0102] Table 4: Effect of bimetallic temperature sensors with different metal deformation on temperature measurement results

[0103] Metal deformation (mm) 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.95 1 1.05 Difference (℃) 0.1 0.1 0.11 0.12 0.13 0.14 0.16 0.18 0.2 0.2 0.21

[0104] As can be seen from Table 4, when the metal deformation of the bimetallic temperature sensor is greater than 1 mm, the measured temperature value differs too much from the actual temperature value and is unqualified. Therefore, the bimetallic temperature sensor selected by the inventor has a metal deformation of less than or equal to 1 mm when the external temperature change is 1°C.

[0105] In one embodiment, the temperature measuring element 1 has a metal housing made of silver or copper. Common metal thermal conductivity coefficients are: silver: 429; copper: 401; gold: 317; aluminum: 237; iron: 80; tin: 67; and lead: 34.8.

[0106] In practice, the higher the thermal conductivity, the closer the temperature transmitted to the temperature measuring element 1 is to the true value. As can be seen from the above coefficients, silver has the highest thermal conductivity, with copper also close in on the list. Both are significantly higher than other metals, so the inventors prefer the metal housing to contain silver or copper. However, considering that silver is much more expensive than copper, which can significantly increase costs, copper is the most preferred option.

[0107] Example 2

[0108] The present invention provides a charging device, which includes a measured object 3 and the temperature measurement structure in the above-mentioned embodiment 1.

[0109] Furthermore, when the charging device is assembled, the temperature measuring element 1 contacts the object 3 to be measured, the temperature measuring surface 11 contacts the object 3 to be measured and applies pressure to the object 3 , and the temperature measuring element 1 measures the temperature of the object 3 to be measured.

[0110] In specific implementation, when the charging device is assembled and used, stress is generated between the object to be measured 3 and the temperature measuring element 1 through the rotating shaft 13 and the third surface 103, so that the temperature measuring surface 11 and the first surface 21 form a certain angle. At this time, pressure is generated between the temperature measuring surface 11 and the object to be measured 3, so that the temperature measuring element 1 is firmly fixed in the bracket 2, and the temperature measuring surface 11 can be continuously and tightly fitted with the object to be measured 3.

[0111] In some embodiments, the contact area between the temperature measuring surface 11 and the object to be measured 3 accounts for 0.1%-95% of the surface area of ​​the object to be measured 3 .

[0112] Furthermore, the contact area between the temperature measuring surface 11 and the object to be measured 3 accounts for 1%-85% of the surface area of ​​the object to be measured 3 .

[0113] In order to verify the influence of the contact area between the temperature measuring surface 11 and the object 3 on the temperature measurement effect, the inventors selected objects 3 of the same size and different contact areas between the temperature measuring surface 11 and the object 3 to measure the temperature of the object 3, and made the temperature measuring surface 11 contact the object 3 with the same pressure. The objects 3 were set to the same temperature, and then the temperature of the object 3 was measured using the temperature measuring element 1 and the absolute value was taken as the difference between the temperature and the actual temperature. An absolute value greater than 2°C was considered unqualified. The results are recorded in Table 5.

[0114] Table 5: Influence of the contact area ratio between the temperature measuring surface and the object being measured on the temperature measurement effect

[0115]

[0116] As can be seen from Table 5, when the contact area between the temperature measuring surface 11 and the object 3 is less than 0.1% of the contact surface area, the temperature difference exceeds 2°C. When the contact area between the temperature measuring surface 11 and the object 3 is greater than 95% of the contact surface area, the temperature measured by the temperature measuring element 1 is the same as the actual temperature, and it is no longer necessary to further increase the contact area. Therefore, the inventors set the contact area between the temperature measuring surface 11 and the object 3 to be 0.1%-95%. As can be seen from Table 5, when the contact area between the temperature measuring surface 11 and the object 3 is greater than or equal to 1% of the contact surface area, a better temperature measurement effect can be obtained, and when it is less than or equal to 85%, it is also a very ideal situation. Therefore, the inventors further prefer that the contact area between the temperature measuring surface 11 and the object 3 is 1%-85% of the contact surface area.

[0117] Furthermore, the pressure applied by the temperature measuring surface 11 to the object to be measured 3 is 5N-98N.

[0118] In order to verify the influence of the pressure applied by the temperature measuring surface 11 on the object to be measured 3 on the detection result of the temperature measuring element 1 and the damage of the temperature measuring element 1, the inventor selected the same object to be measured 3 and the temperature measuring element 1, and adopted different pressures of the temperature measuring surface 11 on the object to be measured 3. The temperature rise value detected by the temperature measuring element 1 and the damage of the temperature measuring element 1 were tested under different pressure conditions. In this embodiment, a temperature rise value greater than 12K is unqualified, and a damaged temperature measuring element 1 is unqualified.

[0119] The temperature rise value is detected by applying the same amount of heat to the object under test 3 to keep its temperature constant, then reading the temperature detected by the temperature measuring element 1 in contact with the object under test 3, and subtracting it from the initial temperature to obtain the temperature rise value, which is recorded in Table 6.

[0120] The damage condition of the temperature measuring element 1 is detected by performing 50 pressure tests under the condition that the object under test 3 applies different pressures to the temperature measuring element 1 , and observing the damage condition of the temperature measuring element 1 .

[0121] Table 6. Effect of different pressures applied by the temperature measuring surface 11 to the object 3 on the temperature rise value

[0122]

[0123] As can be seen from Table 6 above, when the pressure exerted by the object under test 3 on the temperature measuring surface 11 was less than 5 N, the temperature rise detected by the temperature measuring element 1 exceeded the required value, failing to meet the standard. Furthermore, when the pressure exerted by the object under test 3 on the temperature measuring surface 11 was greater than 98 N, the temperature measuring element 1 was damaged more than twice, also failing to meet the standard. Therefore, the inventors set the pressure exerted by the object under test 3 on the temperature measuring element 1 to a range of 5 N to 98 N.

[0124] Example 3

[0125] The present invention also provides a motor vehicle, which includes the above-mentioned temperature measurement structure or the above-mentioned charging device.

[0126] The above descriptions are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A temperature measurement structure, characterized in that: The device comprises a bracket and a temperature measuring element, wherein the bracket has a first surface, an area for accommodating the temperature measuring element is provided on the first surface, and the temperature measuring element has a temperature measuring surface, the temperature measuring surface at least partially protrudes from the first surface, and the temperature measuring surface forms a variable angle with the first surface; The region is provided with a groove, and the temperature measuring element is at least partially accommodated in the groove; The bracket also has a first end surface; The first end surface is further provided with a card slot, and the card slot is located on both sides of the groove; The groove has a bottom surface, a clamping claw is arranged on the bottom surface, and a clamping hook is provided on the clamping claw, and the clamping hook protrudes from the bottom surface.

2. The temperature measurement structure according to claim 1, characterized in that: The angle between the temperature measuring surface and the first surface is 1°-27°.

3. The temperature measurement structure according to claim 1, characterized in that: The height of the temperature measuring surface protruding from the first surface is 1%-30% of the thickness of the temperature measuring element.

4. The temperature measurement structure according to claim 1, characterized in that: The groove extends through to the first end surface.

5. The temperature measurement structure according to claim 1, characterized in that: One end of the temperature measuring element has two opposite rotating shafts, and the rotating shafts are located in the slot.

6. The temperature measurement structure according to claim 5, characterized in that: The temperature measuring element has two opposite second surfaces, and the rotating shafts are respectively arranged perpendicularly on the second surfaces.

7. The temperature measurement structure according to claim 6, characterized in that: The temperature measuring element has a second end surface, the second end surface is provided with the rotating shaft, and the rotating shaft extends perpendicularly to the second surface.

8. The temperature measurement structure according to claim 1, characterized in that: The card slot has a third surface, and the third surface is a surface parallel to the first surface and has the shortest distance therebetween.

9. The temperature measurement structure according to claim 8, characterized in that: The distance from the first surface to the edge of the rotating shaft is smaller than the distance from the first surface to the third surface.

10. The temperature measurement structure according to claim 9, characterized in that: The distance from the first surface to the edge of the rotating shaft is 0.5 times to 0.8 times the distance from the first surface to the third surface.

11. The temperature measurement structure according to claim 5, characterized in that: The rotating shaft is elastic.

12. The temperature measurement structure according to claim 1, characterized in that: The hook has a limiting surface, and the limiting surface is perpendicular to the bottom surface, or the angle between the limiting surface and the bottom surface is acute.

13. The temperature measurement structure according to claim 12, characterized in that: The temperature measuring element has a second end surface, and the limiting surface contacts the second end surface to limit the temperature measuring element from being separated from the groove.

14. The temperature measurement structure according to claim 1, characterized in that: The claw is elastic, so that the hook does not protrude from the bottom surface under the action of external force.

15. The temperature measurement structure according to claim 1, characterized in that: The cross-sectional shape of the temperature measuring element perpendicular to the temperature measuring surface is rectangular, quadrilateral or polygonal.

16. The temperature measurement structure according to claim 1, characterized in that: The width of the groove is greater than or equal to the widest part of the temperature measuring element parallel to the temperature measuring surface.

17. The temperature measurement structure according to claim 5, characterized in that: The cross-sectional shape of the rotating shaft is circular, elliptical, flat, triangular, rectangular, quadrilateral or polygonal.

18. The temperature measurement structure according to claim 1, characterized in that: The temperature measuring element is an NTC temperature sensor or a PTC temperature sensor.

19. The temperature measurement structure according to claim 1, characterized in that: The temperature measuring element is a bimetallic temperature sensor.

20. The temperature measurement structure according to claim 19, characterized in that: When the external temperature changes by 1° C., the deformation of the metal of the bimetallic temperature sensor is less than or equal to 1 mm.

21. The temperature measurement structure according to claim 1, characterized in that: The temperature measuring element has a metal shell, and the material of the metal shell contains silver or copper.

22. A charging device, characterized in that: The charging device includes an object to be measured and the temperature measurement structure according to any one of claims 1 to 21.

23. The charging device according to claim 22, wherein: When the charging device is assembled, the temperature measuring element contacts the object to be measured, the temperature measuring surface contacts the object to be measured and applies pressure to the object to be measured, and the temperature measuring element measures the temperature of the object to be measured.

24. The charging device according to claim 23, wherein: The contact area between the temperature measuring surface and the object to be measured accounts for 0.1%-95% of the surface area of ​​the object to be measured.

25. The charging device according to claim 24, characterized in that: The contact area between the temperature measuring surface and the object to be measured accounts for 1%-85% of the surface area of ​​the object to be measured.

26. The charging device according to claim 22, wherein: The pressure applied by the temperature measuring surface to the object to be measured is 5N-98N.

27. A motor vehicle, characterized in that: The motor vehicle includes the temperature measurement structure according to any one of claims 1 to 21 or the charging device according to any one of claims 22 to 26.

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