Temperature detection device

Abstract

This utility model discloses a temperature detection device. Belonging to the field of motor technology, this temperature detection device is used to detect the temperature of the stator winding. The device includes a second temperature measuring element, a data acquisition unit, and multiple first temperature measuring elements. Each first temperature measuring element is connected to the stator winding. The second temperature measuring element operates on a different principle than the first temperature measuring elements. A second temperature measuring element can be connected to one of the first temperature measuring elements, or a second temperature measuring element can be adjacent to and connected to one of the first temperature measuring elements on the stator winding. Each first and second temperature measuring element is communicatively connected to the data acquisition unit. Multiple first temperature measuring elements can measure different parts of the stator winding separately, reducing the risk of missed detections. The second temperature measuring element can simultaneously measure the temperature of the stator winding with the first temperature measuring elements to verify the accuracy of the temperature measured by the first temperature measuring elements, thus improving the reliability of the test results.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a temperature detection device. Background Technology

[0002] Most mid-to-high-end sedans currently use range extenders for power transmission, which effectively increases the vehicle's driving range while ensuring power and fuel economy, thus alleviating users' range anxiety.

[0003] In generator bench, range extender bench, and vehicle tests, it is usually necessary to measure whether the winding temperature is within the allowable temperature range to determine whether the generator is qualified. Therefore, the measurement accuracy of the winding temperature directly affects the reliability of the test results. If the measurement accuracy is insufficient, the measured winding temperature will deviate from the actual winding temperature, resulting in low reliability of the test results. Utility Model Content

[0004] This invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, this invention proposes a temperature detection device, which helps to improve the reliability of test results.

[0005] According to an embodiment of the present invention, a temperature detection device is used to detect the temperature of a stator winding. The temperature detection device includes: a second temperature measuring element, a data acquisition unit, and a plurality of first temperature measuring elements, each of which is connected to the stator winding. The second temperature measuring element has a different temperature measuring principle than the first temperature measuring element. The second temperature measuring element is connected to one of the first temperature measuring elements, or the second temperature measuring element is adjacent to and connected to one of the first temperature measuring elements in the stator winding. Each of the first temperature measuring elements and the second temperature measuring element is communicatively connected to the data acquisition unit.

[0006] According to the temperature detection device of this utility model embodiment, its multiple first temperature measuring elements can measure different parts of the stator winding respectively, which can reduce the risk of missed detection. The temperature detection device also includes a second temperature measuring element with a different temperature measuring principle than the first temperature measuring element. The second temperature measuring element can measure the temperature of the stator winding simultaneously with the first temperature measuring element to verify whether the temperature measured by the first temperature measuring element is accurate, which is beneficial to improving the reliability of the test results.

[0007] According to some embodiments of the present invention, the first temperature sensing element is a thermocouple sensor, and the second temperature sensing element is an NTC sensor.

[0008] According to some embodiments of the present invention, the first temperature measuring element is connected to the stator winding by an adhesive.

[0009] According to some embodiments of the present invention, the adhesive includes: a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is coated on the stator winding; the second adhesive layer is coated on the first adhesive layer, and the first temperature sensing element is disposed between the first adhesive layer and the second adhesive layer.

[0010] According to some embodiments of the present invention, the first adhesive layer is a thermally conductive adhesive.

[0011] According to some embodiments of the present invention, the second adhesive layer is a heat-insulating adhesive.

[0012] According to some embodiments of the present invention, the stator winding has a lead-out end and a non-lead-out end in the axial direction of the stator, and a plurality of the first temperature measuring elements are distributed at the lead-out end and the non-lead-out end.

[0013] According to some embodiments of the present invention, a plurality of first temperature measuring elements form a plurality of temperature measuring groups, and the plurality of temperature measuring groups are arranged at intervals along the circumferential direction of the stator. Each temperature measuring group has a plurality of first temperature measuring elements arranged at intervals along the axial direction of the stator.

[0014] According to some embodiments of the present invention, each of the first temperature sensing elements is communicatively connected to the data collector through a corresponding first wire harness. The first wire harness is laid on a heat source, and the temperature of the heat source is less than or equal to the temperature of the stator winding.

[0015] According to some embodiments of the present invention, the temperature detection device further includes: a host computer, which is communicatively connected to the data acquisition unit, and the host computer is used to output temperature field distribution results based on the temperature information acquired by the data acquisition unit.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a temperature detection device and a stator according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the stator and temperature measuring group according to an embodiment of the present utility model.

[0019] Figure label:

[0020] First temperature sensing element 1; Temperature sensing group 11; First wiring harness 12; Second temperature sensing element 2;

[0021] Collector 3; host computer 4; temperature detection device 10; stator 20; stator winding 201; outgoing terminal 2011; non-outgoing terminal 2012. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The following is combined Figure 1 and Figure 2 Detailed description of the temperature detection device 10 according to an embodiment of the present invention.

[0026] Reference Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, the temperature detection device 10 is used to detect the temperature of the stator winding 201. The temperature detection device 10 includes: a second temperature measuring element 2, a data acquisition unit 3, and a plurality of first temperature measuring elements 1. Each first temperature measuring element 1 is connected to the stator winding 201. The second temperature measuring element 2 has a different temperature measuring principle than the first temperature measuring element 1. The second temperature measuring element 2 is connected to one of the first temperature measuring elements 1, or the second temperature measuring element 2 is adjacent to and connected to one of the first temperature measuring elements 1 in the stator winding 201. Each first temperature measuring element 1 and the second temperature measuring element 2 are communicatively connected to the data acquisition unit 3 to convert the electrical signals output by the first temperature measuring element 1 and the second temperature measuring element 2 into temperature signals.

[0027] The stator winding 201 can be one of the components of the stator 20 of the generator in the range extender. When the generator is bench tested, the temperature detection device 10 can be used to detect the temperature of the stator winding 201 to determine whether the generator is qualified. For example, if the temperature of the stator winding 201 is higher than the allowable temperature of the stator winding 201, the generator is judged to be unqualified; otherwise, the generator is qualified.

[0028] Specifically, the first temperature sensing element 1 is adapted to be connected between the gaps of two adjacent coils in the stator winding 201. Multiple first temperature sensing elements 1 can be connected to different parts of the stator winding 201 to detect the temperature of different parts of the stator winding 201. This can reduce the risk of missed detection and avoid the situation where the generator is incorrectly judged to be qualified because the temperature of a certain part of the stator winding 201 exceeds the allowable temperature. This helps to improve the reliability of the test results. In addition, the cooling system of the generator can be optimized based on the temperature of different parts of the stator winding 201 detected by multiple first temperature sensing elements 1.

[0029] In some embodiments, the second temperature sensing element 2 is connected to a first temperature sensing element 1. The second temperature sensing element 2 can directly detect the temperature of the first temperature sensing element 1. By comparing and analyzing the temperature measured by the second temperature sensing element 2 and the temperature measured by the first temperature sensing element 1, it can be verified whether the temperature measured by the first temperature sensing element 1 is accurate, thereby improving the reliability of the test results. For example, if the difference between the temperature measured by the first temperature sensing element 1 and the temperature measured by the second temperature sensing element 2 is within the range of 0 to 0.5°C, it can be determined that the temperature measured by the first temperature sensing element 1 is accurate; otherwise, the temperature measured by the first temperature sensing element 1 is inaccurate.

[0030] In other embodiments, the second temperature sensing element 2 is adjacent to and connected to a first temperature sensing element 1 in the stator winding 201. That is, both the second temperature sensing element 2 and the first temperature sensing element 1 are connected to the stator winding 201, and the second temperature sensing element 2 is adjacent to the first temperature sensing element 1. The first temperature sensing element 1 and the adjacent second temperature sensing element 2 can simultaneously measure the temperature of the stator winding 201. By comparing and analyzing the temperature measured by the first temperature sensing element 1 and the temperature measured by the second temperature sensing element 2, the accuracy of the temperature measured by the first temperature sensing element 1 can be verified, thereby improving the reliability of the test results. The second temperature sensing element 2 and the first temperature sensing element 1 are considered adjacent when the distance between them is less than or equal to 5 mm.

[0031] According to the temperature detection device 10 of this utility model embodiment, its multiple first temperature measuring elements 1 can respectively measure different parts of the stator winding 201, which can reduce the risk of missed detection. The temperature detection device 10 also includes a second temperature measuring element 2 with a different temperature measuring principle than the first temperature measuring element 1. The second temperature measuring element 2 can measure the temperature of the stator winding 201 at the same time as the first temperature measuring element 1 to verify whether the temperature measured by the first temperature measuring element 1 is accurate, which is beneficial to improving the reliability of the test results.

[0032] In some embodiments of this utility model, the first temperature sensing element 1 is a thermocouple sensor, and the second temperature sensing element 2 is an NTC (Negative Temperature Coefficient) sensor. The NTC sensor has high detection accuracy and can accurately measure the temperature to reliably verify whether the temperature measured by the first temperature sensing element 1 is accurate. The thermocouple sensor has a low cost, and using thermocouple sensors for multiple first temperature sensing elements 1 can effectively reduce the manufacturing cost of the temperature detection device 10.

[0033] In some embodiments of this utility model, the first temperature sensing element 1 is connected to the stator winding 201 by an adhesive. The connection method is simple and easy to operate, which helps to reduce the time required to install the first temperature sensing element 1, thereby improving the testing efficiency.

[0034] In some embodiments of this utility model, the adhesive includes a first adhesive layer and a second adhesive layer. The first adhesive layer is coated on the stator winding 201, the second adhesive layer is coated on the first adhesive layer, and the first temperature sensing element 1 is disposed between the first adhesive layer and the second adhesive layer, which is beneficial to improving the connection strength between the first temperature sensing element 1 and the stator winding 201.

[0035] Specifically, when connecting the first temperature sensing element 1 to the stator winding 201 with an adhesive, the substrate surface of the stator winding 201 can be pre-treated to obtain an adhesive area. Then, a first adhesive layer is applied to the surface of the adhesive area, and the detection end of the first temperature sensing element 1 is fixed to the first adhesive layer. Then, a second adhesive layer is applied to the first adhesive layer and the detection end of the first temperature sensing element 1 to form a thickened adhesive layer. A pre-made film can be added to the thickened adhesive layer. Then, the thickened adhesive layer and the pre-made film are pressurized and cured to form a surface adhesive layer for reliably fixing the first temperature sensing element 1, thereby achieving stable and reliable fixing of the first temperature sensing element 1.

[0036] In some embodiments of this utility model, the first adhesive layer is a thermally conductive adhesive. The thermally conductive adhesive has a high thermal conductivity, which can quickly conduct the heat of the stator winding 201 to the first temperature sensing element 1, thereby improving the response speed of the first temperature sensing element 1. Furthermore, the thermally conductive adhesive with a high thermal conductivity can reduce the heat loss during the conduction process, so that the first temperature sensing element 1 can accurately measure the temperature of the stator winding 201.

[0037] In some embodiments of this utility model, the second adhesive layer is a heat-insulating adhesive, which can block the conduction of heat to reduce the loss and influx of heat at the part measured by the first temperature measuring element 1, thereby facilitating the accurate measurement of the temperature of the stator winding 201 by the first temperature measuring element 1.

[0038] In some embodiments of this utility model, reference is made to Figure 2 As shown, the stator winding 201 has a lead-out end 2011 and a non-lead-out end 2012 in the axial direction of the stator 20. Multiple first temperature sensing elements 1 are distributed at the lead-out end 2011 and the non-lead-out end 2012 to detect the temperature of the stator winding 201 at the lead-out end 2011 and the non-lead-out end 2012 respectively. This improves the comprehensiveness of temperature detection, reduces the risk of missed detections, and thus helps improve the reliability of test results. The lead-out end 2011 is suitable for connecting electrical equipment.

[0039] In some embodiments of this utility model, reference is made to Figure 1 and 2 As shown, multiple first temperature measuring elements 1 form multiple temperature measuring groups 11, which are arranged at intervals along the circumferential direction of the stator 20. Each temperature measuring group 11 has multiple first temperature measuring elements 1 arranged at intervals along the axial direction of the stator 20, so as to measure the temperature of multiple different parts of the stator winding 201 in the circumferential and axial directions of the stator 20. This can further improve the comprehensiveness of temperature detection, reduce the risk of missed detection, and help improve the reliability of test results.

[0040] In some embodiments of this utility model, reference is made to Figure 1 As shown, in the circumferential direction of the stator 20, the interval angle between two adjacent temperature measuring groups 11 is α, and α satisfies the relationship: 45°≤α≤90°. For example, α can be 45°, 70°, 90°, etc., which helps to reduce testing costs and improve the reliability of test results.

[0041] It is understandable that when α < 45°, the interval angle between two adjacent temperature measurement groups 11 is small, requiring a large number of temperature measurement groups 11 to be arranged, resulting in higher testing costs. When α > 90°, the interval angle between two adjacent temperature measurement groups 11 is large, increasing the risk of missed detections. In this embodiment, α is within the range of 45° to 90°, resulting in a moderate interval angle between two adjacent temperature measurement groups 11, a moderate number of temperature measurement groups 11, lower testing costs, and a lower risk of missed detections, which is beneficial for improving the reliability of test results.

[0042] Reference Figure 2As shown, in the axial direction of the stator 20, the distance between two adjacent first temperature measuring elements 1 in each temperature measuring group 11 is L, and L satisfies the relationship: 5mm≤L≤10mm. For example, L can be 5mm, 8mm, 10mm, etc., which helps to reduce testing costs and improve the reliability of test results.

[0043] It is understandable that when L < 5 mm, the distance between two adjacent first temperature measuring elements 1 in each temperature measuring group 11 is small, requiring a large number of first temperature measuring elements 1 to be arranged, resulting in higher testing costs. When L > 10 mm, the distance between two adjacent first temperature measuring elements 1 in each temperature measuring group 11 is large, increasing the risk of missed detections. In this embodiment, L is in the range of 5 mm to 10 mm, resulting in a moderate distance between two adjacent first temperature measuring elements 1 in each temperature measuring group 11, a moderate number of first temperature measuring elements 1, lower testing costs, and a lower risk of missed detections, which is beneficial to improving the reliability of test results.

[0044] The circumferential angle between two adjacent temperature measuring groups 11 and the axial spacing between two adjacent first temperature measuring elements 1 in each temperature measuring group 11 can be set according to the CAE simulation analysis results of the temperature field of the generator stator 20 under different operating conditions.

[0045] In some embodiments of this utility model, reference is made to Figure 1 As shown, each first temperature sensing element 1 is connected to the data acquisition unit 3 via a corresponding first wiring harness 12. The first wiring harness 12 is laid on the heat source, and the temperature of the heat source is less than or equal to the temperature of the stator winding 201, so that the first temperature sensing element 1 can accurately measure the temperature of the stator winding 201. The heat source can be the stator winding 201 or a heating device, such as a PTC heater.

[0046] It is understandable that the first wire harness 12 is laid on the heat source, which can reduce the temperature difference between the first wire harness 12 and its surrounding environment, thereby reducing the heat dissipation of the first wire harness 12. This can reduce the cooling of the first temperature sensing element 1 and the stator winding 201 at the connection caused by the heat dissipation of the first wire harness 12, and prevent the temperature detected by the first temperature sensing element 1 from being too low. In addition, the temperature of the heat source is less than or equal to the temperature of the stator winding 201, which can prevent the heat source from heating the first wire harness 12 and prevent the heat of the first wire harness 12 after heating from being conducted to the first temperature sensing element 1, thus preventing the temperature detected by the first temperature sensing element 1 from being too high. This is conducive to the first temperature sensing element 1 accurately measuring the temperature of the stator winding 201.

[0047] In some embodiments of this utility model, reference is made to Figure 1As shown, the temperature detection device 10 also includes a host computer 4, which is connected to the data acquisition unit 3. The host computer 4 is used to output the temperature field distribution result based on the temperature information obtained by the data acquisition unit 3. The host computer 4 can optimize the design of the generator's cooling system based on the temperature field distribution result of the stator winding 201. For example, for parts of the stator winding 201 with high temperature, the heat exchange area between the cooling system and the part can be increased to increase the heat dissipation effect on the part, avoid abnormal situations such as demagnetization caused by excessive temperature, and ensure the normal operation of the generator.

[0048] In this embodiment, the temperature detection device 10 has thirty-six first temperature sensing elements 1, which can be respectively a first thermocouple, a second thermocouple, a third thermocouple, a fourth thermocouple, a fifth thermocouple, a sixth thermocouple, a seventh thermocouple, an eighth thermocouple, a ninth thermocouple, a tenth thermocouple, an eleventh thermocouple, a twelfth thermocouple, a thirteenth thermocouple, a fourteenth thermocouple, a fifteenth thermocouple, a sixteenth thermocouple, a seventeenth thermocouple, an eighteenth thermocouple, a nineteenth thermocouple, a twentieth thermocouple, a twenty-first thermocouple, a twenty-second thermocouple, a twenty-third thermocouple, a twenty-fourth thermocouple, a twenty-fifth thermocouple, a twenty-sixth thermocouple, a thirtieth thermocouple, a thirty-first thermocouple, a thirty-second thermocouple, a thirty-third thermocouple, a thirty-fourth thermocouple, a thirty-fifth thermocouple, and a thirty-sixth thermocouple.

[0049] The first to eighteenth thermocouples are arranged in groups of three, referencing the CAE simulation analysis results of the temperature field of the generator stator 20 under different operating conditions. They are arranged circumferentially at different angles, and the three thermocouples in each group are axially arranged at different distances on the outgoing end 2011 of the stator winding 201. The nineteenth to thirty-sixth thermocouples are also arranged in groups of three, referencing the CAE simulation analysis results of the temperature field of the generator stator 20 under different operating conditions. They are arranged circumferentially at different angles, and the three thermocouples in each group are axially arranged at different distances on the non-outgoing end 2012 of the stator winding 201. At the position where the eighteenth thermocouple is arranged, a second temperature measuring element 2 is fixed. The temperature test results of the two types of temperature sensors at this test point are compared and analyzed to verify whether the temperature measured by the first temperature measuring element 1 is accurate.

[0050] The temperature detection device 10 according to this utility model embodiment has a reasonable structure and is easy to process and assemble. By using different numbers and forms of thermocouples and NTC temperature sensors, it can be adapted to different types of range extender generators, realizing the testing of the temperature field distribution of the generator stator 20 under different operating conditions. It has low cost and considerable economic benefits. Moreover, multiple thermocouples can measure different parts of the stator winding 201 respectively, which can reflect the temperature distribution of the stator and the location of the highest temperature point, making it convenient to judge the temperature distribution of the stator.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A temperature detecting device characterized by comprising: The temperature detection device is used to detect the temperature of the stator winding (201), and the temperature detection device includes: Multiple first temperature sensing elements (1), each of which is connected to the stator winding (201); The second temperature measuring element (2) has a different temperature measuring principle from the first temperature measuring element (1). The second temperature measuring element (2) is connected to one of the first temperature measuring elements (1), or the second temperature measuring element (2) is adjacent to one of the first temperature measuring elements (1) and connected to the stator winding (201). The collector (3) is connected in communication with each of the first temperature measuring element (1) and the second temperature measuring element (2).

2. The temperature detecting device according to claim 1, wherein The first temperature sensing element (1) is a thermocouple sensor, and the second temperature sensing element (2) is an NTC sensor.

3. The temperature detecting device according to claim 1, wherein The first temperature sensing element (1) is connected to the stator winding (201) by an adhesive.

4. The temperature detecting device according to claim 3, wherein The adhesive comprises: A first adhesive layer is applied to the stator winding (201); The second adhesive layer is coated on the first adhesive layer, and the first temperature sensing element (1) is disposed between the first adhesive layer and the second adhesive layer.

5. The temperature detecting device according to claim 4, wherein The first adhesive layer is a thermally conductive adhesive.

6. The temperature detection device according to claim 5, characterized in that, The second adhesive layer is a heat-insulating adhesive.

7. The temperature detecting device according to claim 1, wherein The stator winding (201) has a lead-out end (2011) and a non-lead-out end (2012) in the axial direction of the stator (20), and a plurality of the first temperature measuring elements (1) are distributed at the lead-out end (2011) and the non-lead-out end (2012).

8. The temperature detecting device according to claim 7, wherein Multiple first temperature sensing elements (1) form multiple temperature sensing groups (11), and the multiple temperature sensing groups (11) are arranged at intervals along the circumferential direction of the stator (20). Each temperature sensing group (11) has multiple first temperature sensing elements (1) arranged at intervals along the axial direction of the stator (20).

9. The temperature detecting device according to claim 1, wherein Each of the first temperature sensing elements (1) is connected to the collector (3) via a corresponding first wire harness (12). The first wire harness (12) is laid on the heat source, and the temperature of the heat source is less than or equal to the temperature of the stator winding (201).

10. The temperature detecting device according to any one of claims 1 to 9, characterized by, The temperature detection device further includes a host computer (4), which is connected to the data acquisition unit (3) for communication. The host computer (4) is used to output the temperature field distribution result based on the temperature information obtained by the data acquisition unit (3).

Images