Thermocouple and thermocouple testing device
By wrapping the thermocouple wire with a high-temperature resistant flexible shielding wire and designing a large-area contact component, the problem of easy deformation and breakage of the thermocouple wire was solved, and the stability and accuracy of temperature detection were achieved.
Patent Information
- Application Number
- CN202520717668.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-16
AI Technical Summary
Existing thermocouple wires are prone to deformation due to their material and repeated bending over a long period of time. After repeated use, they are prone to permanent deformation or breakage, resulting in poor contact with the solar cells and affecting the accuracy and stability of temperature testing.
A shielding wire made of high-temperature resistant flexible material is sleeved on the outside of the thermocouple wire, and contact components are designed to achieve stable contact over a large area, absorb mechanical stress, prevent the thermocouple wire from breaking, and isolate external friction and compression to maintain structural integrity.
This improved the stability and measurement accuracy of the temperature detection signal, ensured reliable contact between the thermocouple and the battery cell, and enabled rapid and accurate temperature acquisition.
Smart Images
Figure CN223976753U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of furnace temperature testing technology, and in particular to a thermocouple and a thermocouple testing device. Background Technology
[0002] Currently, the production line mainly uses furnace temperature gauges to measure the actual temperature curves of different sintering zones. When testing the sintering curve using a furnace temperature gauge, it primarily relies on thermocouple wires made of extremely fine heat-resistant metal wires as probes to contact the blue film solar cells. To achieve precise contact between the thermocouple wire ends, the ends need to be bent 90° to form contact points for temperature measurement. However, because the thermocouple wire is easily deformed and subjected to repeated bending over a long period, it is prone to permanent deformation or breakage after multiple uses, leading to poor contact between the thermocouple wire and the solar cell, ultimately affecting the accuracy and stability of temperature testing.
[0003] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Utility Model Content
[0004] This application provides a thermocouple and a thermocouple testing device to solve the problem that the thermocouple wires of existing thermocouples are prone to deformation due to their material and long-term repeated bending, and are prone to permanent deformation or breakage after multiple uses, resulting in poor contact between the thermocouple wires and the battery cells, ultimately affecting the accuracy and stability of temperature testing.
[0005] As one aspect of the embodiments of this application, this application provides a thermocouple, including:
[0006] Thermocouple wire and shielding wire, wherein the shielding wire is configured as a high-temperature resistant flexible material and is sleeved on the outside of the thermocouple wire;
[0007] The thermocouple wire includes a first end and a second end, the first end being used for electrical connection and the second end being used for electrical coupling to the battery cell to be tested.
[0008] Optionally, it also includes a contact component connected to the second end of the thermocouple wire, the contact component having a contact surface for attaching to the battery cell to be tested.
[0009] Optionally, the contact component is configured as a sheet, with both surfaces of the sheet-shaped contact component serving as contact surfaces. One of the two contact surfaces is used to adhere to the battery cell to be tested, and the other is connected to the second end of the thermocouple wire.
[0010] Optionally, the contact member is configured as an annular sheet, the outer periphery of which is connected to the second end of the thermocouple wire.
[0011] Optionally, the straight length of the annular sheet after unfolding along its outer edge is 18-30 mm, and the thickness of the annular sheet is 0.05-0.2 mm.
[0012] Optionally, the thermocouple wire has a length of 0.2-1m and a diameter of 0.1-0.4mm.
[0013] Optionally, the contact component is configured as a sheet-like aerodynamic topology film, which has a built-in array of micro air chambers and expands into a preset topological shape after being inflated.
[0014] Optionally, the thermocouple wire is a type K thermocouple wire, which is composed of a nickel-chromium alloy (positive electrode, KP) and a nickel-silicon alloy (negative electrode, KN); or
[0015] The thermocouple wire is a T-type thermocouple wire, which is composed of pure copper (positive electrode, TP) and copper-nickel alloy (constantan, TN).
[0016] Optionally, the shielding wire is an XS ceramic fiber shielding wire.
[0017] As another aspect of the embodiments of this application, the embodiments of this application also provide a thermocouple testing device, including the thermocouple as described above, and also including a device body, wherein the thermocouple is disposed on the device body.
[0018] The embodiments of this application employing the above-described technical solution may include the following advantages: by setting a thermocouple comprising a thermocouple wire and a shielding wire, the shielding wire is configured as a high-temperature resistant flexible material and sleeved on the outside of the thermocouple wire; wherein, the thermocouple wire includes a first end and a second end opposite to each other, the first end being used for electrical connection, and the second end being used for electrical coupling to the battery cell to be tested; through the flexible characteristics of the shielding wire, mechanical stress can be absorbed during manual bending or adjustment operations, preventing the internal thermocouple wire from breaking due to excessive deformation; at the same time, the shielding wire effectively isolates external friction and compression, maintaining the integrity of the thermocouple wire structure, thereby ensuring the stability and measurement accuracy of the temperature detection signal. Attached Figure Description
[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.
[0020] Figure 1 This is a schematic diagram of the structure of a thermocouple provided in an embodiment of this application;
[0021] Figure 2 For along Figure 1 A cross-sectional view along the AA direction.
[0022] Explanation of reference numerals in the attached figures:
[0023] 10-Thermocouple; 1-Plug; 2-Thermocouple wire; 3-Shielding wire; 4-Contact component; 41-Contact surface; 20-Battery cell. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments.
[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0026] In this application, the term "numerical interval" (i.e., numerical range) refers to a range of values. Unless otherwise specified, the distribution of selectable values within this numerical interval is considered continuous, and includes the two endpoints (i.e., the minimum and maximum values) of the interval, as well as every value between these endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that interval, it includes the two endpoints of the range and every integer between them, effectively listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in this numerical interval can be any quantitative value, such as a number, percentage, or proportion. The term "numerical interval" can broadly include percentage intervals, proportion intervals, ratio intervals, and other quantitative intervals.
[0027] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein.
[0028] This utility model discloses a thermocouple testing device, which includes a device body and a thermocouple 10, the thermocouple 10 being disposed on the device body. Please refer to [link to relevant documentation]. Figure 1 The thermocouple 10 in this solution includes a thermocouple wire 2 and a shielding wire 3. The shielding wire 3 is made of a high-temperature resistant flexible material, which can maintain normal physical properties at a temperature of at least 900°C. Figure 2 As shown, the shielding wire 3 is sleeved around the outside of the thermocouple wire 2. The thermocouple wire 2 includes a first end and a second end, the first end being used for electrical connection, and the second end being used for electrical coupling to the battery cell 20 to be tested. With this design, the shielding wire 3, wrapped around the thermocouple wire 2, can absorb mechanical stress during bending or adjustment, based on its own flexibility, preventing the internal thermocouple wire 2 from breaking due to excessive deformation. At the same time, the shielding wire 3 effectively isolates external friction and compression, maintaining the structural integrity of the thermocouple wire 2, thereby ensuring the stability and measurement accuracy of the temperature detection signal.
[0029] In an optional embodiment, considering that the small size of the contact point at the end of the conventional thermocouple wire 2 can lead to temperature deviations during testing, the thermocouple 10 further includes a contact component 4. The second end of the thermocouple wire 2 is connected to the contact component 4, and the contact component 4 has a contact surface 41 for adhering to the battery cell 20 to be tested. This design, through the surface contact structure of the contact component 4, ensures a large-area stable contact between the thermocouple wire 2 and the battery cell 20. Even when the thermocouple wire 2 deforms due to human operation, the contact surface 41 can still fully adhere to the surface of the battery cell 20, thereby ensuring reliable transmission of the temperature signal and ultimately achieving rapid and accurate acquisition of the actual temperature inside the furnace. The first end of the thermocouple wire 2 is equipped with a plug 1 for connecting to an external power source to form a closed circuit.
[0030] Furthermore, the contact component 4 is configured as a sheet, with both surfaces of the sheet-like contact component 4 serving as contact surfaces 41. One of the two contact surfaces 41 is used to adhere to the battery cell 20 to be tested, and the other is connected to the second end of the thermocouple wire 2. This design approach has several advantages. Firstly, the sheet-like structure of the contact component 4 allows for temperature measurement by adhering to either surface of the battery cell 20. The sheet-like structure and the battery cell 20 can achieve a tight fit during testing, which is simple and convenient. Secondly, the connection method of fixing the thermocouple wire 2 to the sheet-like contact component 4, with one surface in contact with the battery cell 20, allows for good contact between the thermocouple wire 2 and the battery cell 20 without bending it during use.
[0031] Furthermore, the sheet-like contact component 4 is an annular thin sheet, with its outer periphery connected to the end of the thermocouple wire 2 furthest from the plug 1. This design, on the one hand, ensures that the contact pressure is evenly distributed circumferentially due to its symmetry, eliminating localized stress concentration; on the other hand, its symmetry can counteract the internal stress generated by the thermal expansion of the material under high-temperature conditions, preventing the contact surface 41 from detaching due to temperature fluctuations and ensuring long-term thermal stability. It is understood that in other embodiments, square or triangular thin sheets may also be used, and this is not limited to them here.
[0032] In some alternative embodiments, the contact component 4 is configured as a sheet-like pneumatic topology film. The sheet-like pneumatic topology film has a built-in micro air cavity array. After being inflated, it expands into a preset topological shape. A pressure sensor is also provided inside the sheet-like pneumatic topology film. The pressure sensor provides real-time feedback on the fit and dynamically adjusts the airbag pressure distribution so that the sheet-like pneumatic topology film can fit the battery cell 20 to be tested very well.
[0033] Preferably, the straight-line length of the annular sheet after unfolding along its outer edge is 18-30 mm, and the thickness of the annular sheet is 0.05-0.2 mm. If the straight-line length of the annular sheet after unfolding along its outer edge is less than 18 mm, the diameter of the annular sheet is too small, which may prevent it from fitting the shape of the battery cell 20, leading to installation difficulties or failure to completely cover the detection area, resulting in a temperature monitoring blind spot. If the straight-line length of the annular sheet after unfolding along its outer edge is greater than 30 mm, the contact with the battery cell 20 will not be tight, easily forming gaps, leading to delayed heat transfer or measurement errors. If the thickness of the annular sheet is less than 0.05 mm, the material is too thin and easily torn or damaged, especially in vibration or high-temperature environments where reliability is significantly reduced. If the thickness of the annular sheet is greater than 0.2 mm, the material is too rigid and difficult to fit the curved surface of the battery cell, resulting in poor contact or local stress concentration, which may lead to fatigue fracture after long-term use. In this embodiment, the straight length of the annular sheet after unfolding along the outer edge is 18 mm and the thickness of the annular sheet is 0.2 mm. With this design, the combination of 18 mm length and 0.2 mm thickness (length-to-thickness ratio of 90:1) can effectively absorb the difference in thermal expansion of the material and prevent the contact surface 41 from separating from the battery cell 20 or from stress cracking at high temperatures.
[0034] In an optional embodiment, the thermocouple wire 2 has a length of 0.2-1m and a diameter of 0.1-0.4mm. If the length of the thermocouple wire 2 is less than 0.2m, it may be difficult to flexibly place it at the designated detection position of the battery cell, requiring forced bending or stretching, which increases mechanical stress. If the length of the thermocouple wire 2 is greater than 1m, the resistance increases with the length, resulting in a larger voltage drop, reduced signal transmission efficiency, and lower measurement accuracy. If the diameter of the thermocouple wire 2 is less than 0.1mm, the thin wire is prone to breakage due to bending, vibration, or installation stress, leading to the risk of open circuit. If the diameter of the thermocouple wire 2 is greater than 0.4mm, the thick wire has a large heat capacity, resulting in a slow response speed to temperature changes and an inability to reflect changes in real time. Rapid temperature rise or fall of the battery cell; in this embodiment, the thermocouple wire 2 is 1m long and 0.4mm in diameter. With this design, on the one hand, the 1m length of the thermocouple wire 2 can meet the requirements of short-to-medium distance temperature measurement and reduce the risk of signal attenuation; on the other hand, the 0.4mm diameter of the thermocouple wire 2 can significantly reduce the heat capacity, shorten the heat conduction path, and make the thermocouple 10 respond to temperature changes faster. In addition, while maintaining flexibility, it still has sufficient mechanical strength, which, together with the shielding wire 3, can improve the shock resistance and pressure resistance.
[0035] Furthermore, as a preferred embodiment, the thermocouple wire 2 is a K-type thermocouple wire, which is composed of a nickel-chromium alloy (positive electrode, KP) and a nickel-silicon alloy (negative electrode, KN). Using a K-type thermocouple wire offers several advantages: firstly, its short-term temperature resistance can reach 1300℃, fully meeting the measurement requirements of high-temperature scenarios; secondly, its thermoelectric potential reaches 41μV / ℃ at 1000℃, and the output signal exhibits an approximately linear relationship with temperature, significantly simplifying the complexity of signal acquisition and data processing; furthermore, its response time can be shortened to 0.5~2 seconds, enabling real-time capture of rapid temperature fluctuations, thereby achieving accurate monitoring. This comprehensive performance of wide temperature range, high sensitivity, and fast response makes it both efficient and economical.
[0036] As another preferred embodiment, the thermocouple wire 2 is a T-type thermocouple wire, which is composed of pure copper (positive electrode, TP) and a copper-nickel alloy (constantan, TN). Using a T-type thermocouple wire has the following advantages: 1. High precision (±0.5℃ or ±0.8% t) and excellent thermoelectric potential linearity characteristics enable precise furnace temperature control; 2. Good oxidation resistance, able to withstand oxidizing atmospheres and slightly corrosive environments inside the furnace, and not easily drifting during long-term use; 3. Fast response speed (due to low conductor heat capacity), suitable for dynamic temperature monitoring; 4. Low cost.
[0037] In an optional embodiment, the shielding wire 3 is an XS ceramic fiber shielded wire. With this design, the XS ceramic fiber shielded wire, composed of a ceramic fiber insulation layer and a metal shielding layer, can withstand continuous high-temperature environments of 1200℃ and instantaneous high temperatures of 1425℃. The metal shielding layer significantly improves resistance to physical wear and electromagnetic interference, ensuring signal transmission stability. This results in the thermocouple 10 having good temperature resistance and resistance to wear and interference.
[0038] The thermocouple testing device provided by this utility model includes a thermocouple 10 comprising a thermocouple wire 2 and a shielding wire 3. The shielding wire 3, which wraps around the thermocouple wire 2, is made of a high-temperature resistant flexible material. The thermocouple wire 2 includes a first end and a second end, the first end of which is used for electrical connection, and the second end of which is used for electrical coupling to the battery cell to be tested. Due to the flexibility of the shielding wire 3, mechanical stress can be absorbed during manual bending or adjustment operations, preventing the internal thermocouple wire 2 from breaking due to excessive deformation. At the same time, the shielding wire 3 effectively isolates external friction and compression, maintaining the integrity of the thermocouple wire structure, thereby ensuring the stability and measurement accuracy of the temperature detection signal.
[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0040] For ease of description, directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" generally indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the purpose of facilitating the description of this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the referred mechanism or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the components themselves. For example, if a device in the drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0041] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 communication connection; 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 application according to the specific circumstances.
[0042] Unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0044] It should also be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.
[0045] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0046] It should also be noted that the above are merely preferred embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.
Claims
1. A thermocouple, characterized by, Comprise: A thermocouple wire (2) and a shielding wire (3), the shielding wire (3) is configured as a flexible material resistant to high temperature, sleeved outside the thermocouple wire (2); Wherein, the thermocouple wire (2) comprises opposite first and second ends, the first end is used for connecting electricity, and the second end is used for electrically coupling the battery piece (20) to be detected.
2. The thermocouple of claim 1, wherein, Further comprising a contact component (4) connected to the second end of the thermocouple wire (2), the contact component (4) is provided with a contact surface (41), and the contact surface (41) is used for abutting the battery piece (20) to be detected.
3. The thermocouple of claim 2, wherein, The contact component (4) is configured as a sheet, both surfaces of the sheet-shaped contact component (4) are contact surfaces (41), one of the two contact surfaces (41) is used for abutting the battery piece (20) to be detected, and the other is connected to the second end of the thermocouple wire (2).
4. The thermocouple of claim 2, wherein, The contact component (4) is configured as a ring-shaped sheet, and the outer periphery of the ring-shaped sheet is connected to the second end of the thermocouple wire (2).
5. The thermocouple of claim 4, wherein, The linear length of the ring-shaped sheet after unfolding along the outer edge is 18-30mm, and the thickness of the ring-shaped sheet is 0.05-0.2mm.
6. The thermocouple according to any one of claims 1 to 5, characterized in that The length of the thermocouple wire (2) is 0.2-1m, and the diameter is 0.1-0.4mm.
7. The thermocouple of claim 2, wherein, The contact component (4) is configured as a sheet-shaped pneumatic topological film, the sheet-shaped pneumatic topological film is embedded with a micro air cavity array, and after inflation, it expands into a preset topological shape.
8. The thermocouple according to any one of claims 1 to 5, characterized in that The thermocouple wire (2) is a K-type thermocouple wire or a T-type thermocouple wire.
9. The thermocouple according to any one of claims 1 to 5, characterized in that The shielding wire (3) is an XS ceramic fiber shielding wire.
10. A thermocouple testing device characterized by, Comprise: The thermocouple (10) according to any one of claims 1 to 9; A device body, and the thermocouple (10) is arranged on the device body.