CN220853939U - Positive temperature coefficient thermistor reduction resistance inspection tool - Google Patents
Positive temperature coefficient thermistor reduction resistance inspection tool Download PDFInfo
- Publication number
- CN220853939U CN220853939U CN202322687821.4U CN202322687821U CN220853939U CN 220853939 U CN220853939 U CN 220853939U CN 202322687821 U CN202322687821 U CN 202322687821U CN 220853939 U CN220853939 U CN 220853939U
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- temperature coefficient
- positive temperature
- coefficient thermistor
- spring probe
- upper cover
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- 238000007689 inspection Methods 0.000 title claims description 24
- 238000012360 testing method Methods 0.000 claims abstract description 62
- 239000000523 sample Substances 0.000 claims abstract description 37
- 239000004519 grease Substances 0.000 claims abstract description 8
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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- Thermistors And Varistors (AREA)
Abstract
The utility model provides a tool for testing the reduction resistance of a positive temperature coefficient thermistor, which comprises an upper cover and a base, wherein a test groove for placing the positive temperature coefficient thermistor is formed in the top of the base, a first spring probe which is electrically connected with a test power supply is arranged on the inner bottom surface of the test groove, the first spring probe is in contact with an electrode plate at the bottom of the positive temperature coefficient thermistor, the upper cover seals the test groove, a second spring probe which is electrically connected with the test power supply is arranged on the upper cover, the second spring probe stretches into the test groove to be in contact with the electrode plate at the top of the positive temperature coefficient thermistor, and heat conduction silicone grease is filled in the test groove. The utility model can be repeatedly used for the reduction test of different positive temperature coefficient thermistors, and is more suitable for the reduction resistance test of a single positive temperature coefficient thermistor.
Description
Technical Field
The utility model relates to the field of detection of positive temperature coefficient thermistors, in particular to a tool for detecting the reduction resistance of a positive temperature coefficient thermistor.
Background
Along with the wider and wider application range of the positive temperature coefficient thermistor, the requirements of partial products on the use environment of the positive temperature coefficient thermistor, such as the positive temperature coefficient thermistor for an electric automobile heater, are higher, and the positive temperature coefficient thermistor almost exists in a high-temperature high-pressure reducing atmosphere in the heater due to the higher waterproof grade of the electric automobile heater, so that the reduction resistance of the positive temperature coefficient thermistor is higher, and the reduction resistance of the positive temperature coefficient thermistor is now incorporated into the conventional inspection project of electronic elements.
The existing detection method generally makes the positive temperature coefficient thermistor into a heater finished product and then electrifies the heater finished product, and tests the performances of the positive temperature coefficient thermistor such as resistance, voltage resistance, power, current and the like before and after electrifies, the positive temperature coefficient thermistor needs to be taken out of the heater to perform performance test after electrifies, the manufacturing cost of the heater is high, the heater needs to be broken and disassembled when the positive temperature coefficient thermistor is taken out, and the positive temperature coefficient thermistor can not be used for reduction tests of other positive temperature coefficient thermistors; in addition, there are a plurality of positive temperature coefficient thermistors in the heater, and it is inconvenient to confirm the reduction resistance of a single positive temperature coefficient thermistor.
Therefore, it is necessary to design a new tool for testing the reduction resistance of the positive temperature coefficient thermistor to overcome the above problems.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art, and provides a tool for testing the reduction resistance of a positive temperature coefficient thermistor.
The utility model is realized in the following way:
The utility model provides a tool for testing the reduction resistance of a positive temperature coefficient thermistor, which comprises an upper cover and a base, wherein a test groove for placing the positive temperature coefficient thermistor is formed in the top of the base, a first spring probe which is electrically connected with a test power supply is arranged on the inner bottom surface of the test groove, the first spring probe is in contact with an electrode plate at the bottom of the positive temperature coefficient thermistor, the upper cover seals the test groove, a second spring probe which is electrically connected with the test power supply is arranged on the upper cover, the second spring probe stretches into the test groove to be in contact with the electrode plate at the top of the positive temperature coefficient thermistor, and heat conduction silicone grease is filled in the test groove.
Further, an inner thread is arranged on the inner wall of the inspection groove, and an outer thread matched with the inner thread is arranged on the upper cover.
Further, the upper cover is of a stepped shaft structure and comprises a large-diameter section and a small-diameter section, the small-diameter section stretches into the inspection groove, and the external thread is arranged on the small-diameter section.
Further, the base is an aluminum base, and the inner bottom surface of the inspection groove is coated with an insulating material layer.
Further, the first spring probe is electrically connected with the test power supply through a first wire, and a threading hole for the first wire to extend out is formed in the base.
Further, the second spring probe is electrically connected with the test power supply through a second wire, and the second wire is located at one side of the upper cover, which is away from the base.
Further, the base is cylindrical.
The utility model has the following beneficial effects:
The utility model provides a tooling with simple operation, small volume and low cost, which is mainly used for testing the reduction resistance of a positive temperature coefficient thermistor. In the utility model, the upper cover and the base form a sealing environment required by testing the positive temperature coefficient thermistor; the heat conduction silicone grease in the inspection groove plays a role of a reducing agent, and can simulate the components of the positive temperature coefficient thermistor in the working environment of the heater for the electric automobile; the first spring probe and the second spring probe are respectively and electrically connected with electrode plates at two sides of the positive temperature coefficient thermistor, and the positive temperature coefficient thermistor starts to generate heat after being electrified, so that a reduction test can be performed. The utility model can be repeatedly used for the reduction test of different positive temperature coefficient thermistors, and is more suitable for the reduction resistance test of a single positive temperature coefficient thermistor.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a tool for testing the reduction resistance of a positive temperature coefficient thermistor according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a base according to an embodiment of the present utility model;
fig. 3 is a schematic view of an upper cover according to an embodiment of the present utility model.
In the figure: the device comprises a second spring probe 1, an upper cover 2, a base 3, a first spring probe 4, a first lead 5, a positive temperature coefficient thermistor 6, heat-conducting silicone grease 7, a second lead 8 and a test groove 9.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
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 or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
As shown in fig. 1-3, the embodiment of the utility model provides a tool for testing the reduction resistance of a positive temperature coefficient thermistor, which comprises an upper cover 2 and a base 3, wherein the base 3 is in a cylindrical shape, a test groove 9 for placing the positive temperature coefficient thermistor 6 is formed in the top of the base 3, a first spring probe 4 electrically connected with a test power supply is arranged on the inner bottom surface of the test groove 9, the first spring probe 4 is in contact with an electrode plate at the bottom of the positive temperature coefficient thermistor 6, the upper cover 2 seals the test groove 9, a second spring probe 1 electrically connected with the test power supply is arranged on the upper cover 2, the second spring probe 1 stretches into the test groove 9 to be in contact with the electrode plate at the top of the positive temperature coefficient thermistor 6, and heat conduction silicone grease 7 is filled in the test groove 9. The first spring probe 4 and the second spring probe 1 are respectively and electrically connected with the positive electrode and the negative electrode of the test power supply. The reduction resistance of the ptc thermistor refers to the ability of the ptc thermistor to have less deterioration in electrical properties or a small rate of change in electrical properties in a reducing atmosphere. The existing detection method utilizes a heater to provide a reducing environment for the positive temperature coefficient thermistor during testing. In the utility model, the upper cover 2 and the base 3 form a sealing environment required by testing the positive temperature coefficient thermistor 6; the heat conduction silicone grease 7 plays a role of a reducing agent and can simulate the components of the positive temperature coefficient thermistor 6 in the working environment of the heater for the electric automobile; the first spring probe 4 and the second spring probe 1 are respectively and electrically connected with electrode plates at two sides of the positive temperature coefficient thermistor 6, and the positive temperature coefficient thermistor 6 starts to generate heat after being electrified so as to perform a reduction test. The positive temperature coefficient thermistor 6 is a chip thermistor, two opposite sides of the positive temperature coefficient thermistor 6 are respectively provided with an electrode plate, the second spring probe 1 is used for being electrically connected with the electrode plate on one side of the positive temperature coefficient thermistor 6, and the first spring probe 4 is used for being electrically connected with the electrode plate on the other side of the positive temperature coefficient thermistor 6.
In this embodiment, the inspection groove 9 is a cylindrical groove, an inner thread is provided on an inner wall of the inspection groove 9, and an outer thread matched with the inner thread is provided on the upper cover 2. The upper cover 2 is of a stepped shaft structure and comprises a large-diameter section and a small-diameter section, the small-diameter section stretches into the inspection groove 9, and the external thread is arranged on the small-diameter section. The positive temperature coefficient thermistor 6 is placed on the inner bottom surface of the inspection groove 9, the first spring probe 4 is pressed down, the upper cover 2 is screwed with the inspection groove 9 tightly, the second spring probe 1 on the upper cover 2 presses the electrode plate at the top of the positive temperature coefficient thermistor 6, and the electrode plate at the bottom of the positive temperature coefficient thermistor 6 presses the first spring probe 4.
In this embodiment, the base 3 is an aluminum base, and the inner bottom surface of the inspection groove 9 is coated with an insulating material layer, so that the electrode plate at the bottom of the ptc thermistor 6 is insulated from the base 3.
The embodiment of the utility model also provides a using method of the positive temperature coefficient thermistor reduction resistance testing tool, which comprises the following steps: firstly, measuring the resistance, voltage resistance, current and other properties of the positive temperature coefficient thermistor 6 to be tested before an experiment, putting the positive temperature coefficient thermistor 6 into an inspection groove 9 of a base, enabling an electrode sheet on one side of the positive temperature coefficient thermistor 6 to contact with a first spring probe 4, then injecting heat-conducting silicone grease 7 into the inspection groove 9, screwing an upper cover 2 onto a base 3, and screwing the upper cover to enable a second spring probe 1 to contact with an electrode sheet on the other side of the positive temperature coefficient thermistor 6; the first lead 5 and the second lead 8 are respectively connected with the positive electrode and the negative electrode of a power supply, a voltage power supply is started, timing is started, the positive temperature coefficient thermistor 6 starts to generate heat after being electrified, the positive temperature coefficient thermistor starts to be reduced, after the test time is reached, the power supply is closed, the upper cover 2 is unscrewed, the positive temperature coefficient thermistor 6 is taken out, the resistance value, the current and the voltage resistance of the reduced positive temperature coefficient thermistor 6 are tested after the temperature is kept constant, and the change rate of the resistance value, the current and the voltage resistance of the positive temperature coefficient thermistor 6 before and after the reduction test is calculated, namely the reduction resistance of the positive temperature coefficient thermistor 6.
In this embodiment, the first spring probe 4 is electrically connected to the test power supply through a first wire 5, the base 3 is provided with a threading hole through which the first wire 5 extends, the first wire 5 extends out of the base 3 and is electrically connected to one pole of the test power supply, the second spring probe 1 is electrically connected to the test power supply through a second wire 8, the second wire 8 is located on one side of the upper cover 2 away from the base 3, and the second wire 8 is electrically connected to the other pole of the test power supply.
The utility model provides a tooling with simple operation, small volume and low cost, which is mainly used for testing the reduction resistance of a positive temperature coefficient thermistor.
What is not described in detail in this specification is prior art known to those skilled in the art.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (7)
1. The utility model provides a positive temperature coefficient thermistor reduction resistance inspection frock which characterized in that: the testing device comprises an upper cover and a base, wherein an inspection groove for placing the positive temperature coefficient thermistor is formed in the top of the base, a first spring probe electrically connected with a testing power supply is arranged on the bottom surface in the inspection groove, the first spring probe is in contact with an electrode plate at the bottom of the positive temperature coefficient thermistor, the upper cover seals the inspection groove, a second spring probe electrically connected with the testing power supply is arranged on the upper cover, the second spring probe stretches into the inspection groove to be in contact with the electrode plate at the top of the positive temperature coefficient thermistor, and heat conduction silicone grease is filled in the inspection groove.
2. The positive temperature coefficient thermistor reduction resistance test fixture according to claim 1, wherein: the inner wall of the inspection groove is provided with an internal thread, and the upper cover is provided with an external thread matched with the internal thread.
3. The positive temperature coefficient thermistor reduction resistance test fixture as claimed in claim 2, wherein: the upper cover is of a stepped shaft structure and comprises a large-diameter section and a small-diameter section, the small-diameter section stretches into the inspection groove, and the external thread is arranged on the small-diameter section.
4. The positive temperature coefficient thermistor reduction resistance test fixture according to claim 1, wherein: the base is an aluminum base, and the inner bottom surface of the inspection groove is coated with an insulating material layer.
5. The positive temperature coefficient thermistor reduction resistance test fixture according to claim 1, wherein: the first spring probe is electrically connected with the test power supply through a first wire, and a threading hole for the first wire to extend out is formed in the base.
6. The positive temperature coefficient thermistor reduction resistance test fixture according to claim 1, wherein: the second spring probe is electrically connected with the test power supply through a second wire, and the second wire is positioned on one side of the upper cover, which is away from the base.
7. The positive temperature coefficient thermistor reduction resistance test fixture according to claim 1, wherein: the base is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322687821.4U CN220853939U (en) | 2023-09-28 | 2023-09-28 | Positive temperature coefficient thermistor reduction resistance inspection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322687821.4U CN220853939U (en) | 2023-09-28 | 2023-09-28 | Positive temperature coefficient thermistor reduction resistance inspection tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220853939U true CN220853939U (en) | 2024-04-26 |
Family
ID=90783443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322687821.4U Active CN220853939U (en) | 2023-09-28 | 2023-09-28 | Positive temperature coefficient thermistor reduction resistance inspection tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220853939U (en) |
-
2023
- 2023-09-28 CN CN202322687821.4U patent/CN220853939U/en active Active
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