CN116773038A - Temperature protection sensor of power cable and preparation method thereof - Google Patents
Temperature protection sensor of power cable and preparation method thereof Download PDFInfo
- Publication number
- CN116773038A CN116773038A CN202310725495.3A CN202310725495A CN116773038A CN 116773038 A CN116773038 A CN 116773038A CN 202310725495 A CN202310725495 A CN 202310725495A CN 116773038 A CN116773038 A CN 116773038A
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- China
- Prior art keywords
- thermistor element
- encapsulated
- temperature protection
- encapsulating
- protection sensor
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- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000003822 epoxy resin Substances 0.000 claims abstract description 18
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 18
- 238000005538 encapsulation Methods 0.000 claims abstract description 15
- 239000004593 Epoxy Substances 0.000 claims description 12
- 238000004382 potting Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000011800 void material Substances 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 abstract description 2
- 239000005022 packaging material Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000009413 insulation Methods 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
- B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The application provides a temperature protection sensor and a preparation method thereof, and relates to the field of temperature sensors, wherein the sensor comprises a thermistor element, a wire, an encapsulating material, epoxy resin for encapsulation and a shell; the lead is welded with the pin of the thermistor element, the pin part of the thermistor element is encapsulated by the encapsulating material, and then the encapsulating part is encapsulated in the shell by encapsulating epoxy resin. The thermistor element and the lead connected with the thermistor element are packaged by the packaging material to ensure pressure resistance and insulating performance, and then encapsulated in the shell by using the epoxy resin for encapsulation. The size of the shell can be adjusted according to the wire diameter and the wire distance so as to adapt to different assembly environments. Can be fixed between two power cables by clamping or injection molding.
Description
Technical Field
The application belongs to the field of temperature sensors, and particularly relates to a temperature protection sensor of a power cable and a preparation method thereof.
Background
A temperature sensor refers to a sensor that senses temperature and converts it into a usable output signal. Temperature sensors are a core of temperature measuring instruments, are of a wide variety, and can be adapted to a variety of different operating environments. Along with the development of technology, most electric equipment is developed towards intellectualization and miniaturization. And temperature is an important physical quantity, which is a non-negligible important parameter in the intelligent process. Meanwhile, in the miniaturization process, temperature management is inevitably more and more important. The power supply is used as a core element and is one of main heating components, so that the measurement of the temperature of the power supply is more important.
At present, a temperature protection sensor special for simultaneously measuring temperature of two power cables is lacking in the market. The existing temperature protection sensor is inconvenient in assembly because of not being specially designed, the contact area between the existing temperature protection sensor and a cable is too small to be positioned, the actual temperature of the cable cannot be well reflected due to the fact that the temperature measured by the temperature protection sensor cannot be well caused by assembly problems in the using process, and the thermal reaction time is also influenced.
Disclosure of Invention
The application aims to provide a temperature protection sensor of a power cable and a preparation method thereof, which fill the blank existing in the current temperature protection sensor of the power cable.
In order to achieve the above object, in a first aspect of the present application, there is provided a temperature protection sensor comprising a thermistor element, a wire, an encapsulating material, an epoxy resin for potting, and a housing; the lead is welded with the pin of the thermistor element, the pin part of the thermistor element is encapsulated by the encapsulating material, and then the encapsulating part is encapsulated in the shell by encapsulating epoxy resin.
Further, the shape of the shell is a cambered surface with a concave.
Further, the center of the concave cambered surface of the shell is consistent with the center of the monitored cable.
Further, the encapsulating material comprises one of silica gel and epoxy or sleeve.
Further, the limit of the epoxy resin for encapsulation is the position of the epoxy resin for encapsulation and the plane of the shell.
Further, the encapsulation material is encapsulated and is completely covered with potting epoxy.
In a second aspect of the present application, there is provided a method of manufacturing a temperature protection sensor for a power cable, the method comprising:
connecting and conducting the lead wire with the pin of the thermistor element;
packaging and wrapping the thermistor element, the lead and the connecting part of the lead and the thermistor element by using an encapsulating material;
the encapsulated portion is encased in a housing and encapsulated with a potting epoxy.
Further, the encapsulation material must cover the insulating layer of the wire without leaving voids, and the encapsulation material completely encapsulates the thermistor element.
Further, the potting epoxy completely covers the encapsulation wrap portion.
The beneficial technical effects of the application are at least as follows:
(1) According to the application, two concave cambered surfaces are added on the shell, so that the contact area with the cable is enlarged, and the radius of the concave cambered surfaces and the center distance of the two cables can be determined according to the diameters of the two cables.
(2) The assembly can be carried out by clamping or injection molding, so that the consistency of the assembly positions is ensured.
Drawings
The application will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the application, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.
FIG. 1 is a schematic diagram of a thermistor element and a lead connection according to the present application.
Fig. 2 is a perspective view of a temperature protection sensor according to the present application.
Fig. 3 is a front view of a temperature protection sensor according to the present application.
Fig. 4 is a left side view of a temperature protection sensor according to the present application.
Fig. 5 is a top view of a temperature protection sensor according to the present application.
FIG. 6 is a schematic illustration of the present application after connecting the resistive element to the leads and encapsulating the resistive element with an encapsulant.
Fig. 7 is a schematic view showing the encapsulating of the encapsulating material encapsulating portion of the present application encapsulated in the housing with the epoxy resin for encapsulation.
Wherein, 1-the thermistor component; 2-conducting wires; 3-an encapsulating material; 4-epoxy resin for encapsulation; 5-a housing; 31-epoxy resin; 32-silica gel.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The temperature protection sensor comprises a thermistor element 1, a lead wire 2, an encapsulating material 3, epoxy resin 4 for encapsulation and a shell 5; wherein, referring to fig. 1, a lead wire 2 is soldered to a lead of a thermistor element 1, and a lead portion of the thermistor element 1 is encapsulated with an encapsulating material 3, and then the encapsulated portion is encapsulated in a case 5 with an encapsulating epoxy resin 4.
Specifically, referring to fig. 2-5, the housing 1 is shaped as a concave cambered surface. The center of the concave cambered surface of the shell 5 is consistent with the center of the monitored cable. The concave cambered surface of the shell 5 is determined according to the outer diameter of the tested cable, the circle center of the concave cambered surface depends on the center distance of the outer diameter of the tested cable, the length, width and height dimensions of the shell 5 depend on assembly requirements, the inner hole dimension of the shell 5 is determined according to the outer dimension of the shell 5, and the size model of the thermistor element 1 is selected according to the inner hole dimension of the shell 5.
The encapsulating material 3 comprises one of a silicone gel 32 and an epoxy 31 or a sleeve. Specifically, referring to fig. 6, the encapsulating material 3 is completely covered with the epoxy resin 4 for encapsulation.
Referring to fig. 7, the potting epoxy 4 is limited to a position planar with the housing 5. Specifically, the potting epoxy 4 may be replaced with other materials such as ceramic glue.
The preparation method of the temperature sensor comprises the following steps:
the lead 2 is connected and conducted with the pins of the thermistor element 1, and specifically, the lead is connected and conducted with the two pins of the thermistor element 1;
the thermistor element 1, the wire 2 and the connection part of the wire 2, which is close to the thermistor element 1, are encapsulated by an encapsulating material 3, in particular, the encapsulating material 3 is preferably silica gel 32 and epoxy resin 31 or an available sleeve, the encapsulating material 3 must cover the insulation layer of the wire 2 for a certain length and no gap is left, and the encapsulating material 3 must completely encapsulate the thermistor element 1;
the encapsulated portion is enclosed in the housing 5 and encapsulated with the encapsulating epoxy resin 4, specifically, the housing 5 is not exposed except for the wire 2, and the encapsulating epoxy resin 4 must completely cover the encapsulated portion.
Example 1
The temperature sensor of the application is used for cold and hot impact test, and comprises the following steps:
(1) Using a cold and hot impact test box (number: FAC 0270519003), a multimeter (number: MY 53215394);
(2) The power-on DC is 5V, and the power-on DC is provided with a power-on voltage,
-40 ℃ -10 min → 25 ℃ -5 min → 150 ℃ -10 min → -25 ℃ -5 min … (temperature difference ± 3 ℃); a total of 5000 cycles.
Initial requirements: the appearance of the temperature sensing head is free from visible damage; r50 and R25 are less than or equal to +/-1 percent; insulation and withstand voltage OK (AC 1500V 2MA 60sec in water has no bad phenomena such as breakdown, etc.; voltage DC500V, insulation resistance is more than or equal to 100MΩ).
Specifically, the experimental decision criteria were: r50 and R25 have a rate of change of less than or equal to 3% (compared with the initial value); withstand voltage (in water) AC1500V 2MA 60sec has no breakdown and other adverse phenomena; insulation (in water): DC500V is more than or equal to 100MΩ.
Experimental data are shown in the following table:
the data show that the temperature sensor has the characteristic of high reliability.
Example two
The temperature sensor of the application is used for water boiling test, and comprises the following steps:
(1) A multimeter (number: MY 53215394) using a water boiling tank (number: FAC 0270519003);
(2) Putting the product into 100C hot water, electrifying DC5V, connecting 240 omega current limiting resistor in series, and placing 1000H; the removal was normally resumed for 2h.
Initial requirements: the appearance of the temperature sensing head is free from visible damage; r50 and R25 are less than or equal to +/-1 percent; insulation and withstand voltage OK (AC 1500V 2MA 60sec in water has no bad phenomena such as breakdown, etc.; voltage DC500V, insulation resistance is more than or equal to 100MΩ); .
Specifically, the experimental decision criteria were: ΔR/R25 is less than or equal to + -3%, and B25/85 is less than or equal to + -3%; 2. withstand voltage (in water) AC1500V 2MA 60sec has no breakdown and other adverse phenomena; 3. insulation (in water): DC500V is more than or equal to 100MΩ.
Experimental data are shown in the following table:
the data show that the temperature sensor has the characteristics of high temperature resistance and moisture resistance.
In summary, the above cold and hot impact test and the water boiling test prove that the temperature sensor of the application has excellent performances of high reliability, high temperature resistance and moisture resistance.
While embodiments of the application have been shown and described, it will be understood by those skilled in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A temperature protection sensor, which is characterized by comprising a thermistor element, a wire, an encapsulating material, epoxy resin for encapsulation and a shell; the lead is welded with the pin of the thermistor element, the pin part of the thermistor element is encapsulated by the encapsulating material, and then the encapsulating part is encapsulated in the shell by encapsulating epoxy resin.
2. A temperature protection sensor according to claim 1, wherein the housing is shaped as a concave arc.
3. A temperature protection sensor according to claim 2, wherein the center of the concave arc surface of the housing coincides with the center of the cable being monitored.
4. A temperature-protected sensor according to claim 1, wherein the encapsulating material comprises one of silicone and epoxy or a sleeve.
5. A temperature protection sensor according to claim 1, wherein the potting epoxy is located in a position planar to the housing.
6. A temperature-protected sensor as recited in claim 5, wherein said encapsulation material is encapsulated with potting epoxy.
7. A method of manufacturing a temperature protection sensor for a power cable, the method comprising:
connecting and conducting the lead wire with the pin of the thermistor element;
packaging and wrapping the thermistor element, the lead and the connecting part of the lead and the thermistor element by using an encapsulating material;
the encapsulated portion is encased in a housing and encapsulated with a potting epoxy.
8. The method of claim 7, wherein the encapsulating material must cover the insulating layer of the wire without leaving a void, and the encapsulating material completely encapsulates the thermistor element.
9. The method of manufacturing a temperature protection sensor for a power cable according to claim 7, wherein the potting epoxy completely covers the encapsulation portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310725495.3A CN116773038A (en) | 2023-06-19 | 2023-06-19 | Temperature protection sensor of power cable and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310725495.3A CN116773038A (en) | 2023-06-19 | 2023-06-19 | Temperature protection sensor of power cable and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116773038A true CN116773038A (en) | 2023-09-19 |
Family
ID=88010888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310725495.3A Pending CN116773038A (en) | 2023-06-19 | 2023-06-19 | Temperature protection sensor of power cable and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116773038A (en) |
-
2023
- 2023-06-19 CN CN202310725495.3A patent/CN116773038A/en active Pending
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