CN211014500U

CN211014500U - Full-automatic comprehensive electric performance testing device for PTC element

Info

Publication number: CN211014500U
Application number: CN201921819312.XU
Authority: CN
Inventors: 徐伟
Original assignee: Shanghai Pake Thermistor Ceramics Co ltd
Current assignee: Shanghai Pake Thermistor Ceramics Co ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-07-14
Anticipated expiration: 2029-10-28

Abstract

The utility model provides a PTC component full-automatic electric property comprehensive testing device, include the operation panel and by the box that is located the operation panel periphery, be equipped with the PTC component tool that is used for centre gripping PTC component on the operation panel, the PTC component tool includes the PTC component draw-in groove, draw-in groove elevating system, automatic slip table of module and probe ejection mechanism, be provided with data detection and treater and temperature detection module in the box, data detection and treater control draw-in groove elevating system and probe ejection mechanism, data detection and treater pass through the control line and are connected with the control end of the drive element among the probe ejection mechanism, and detect probe and temperature detection module's detected signal. The utility model can realize the automatic test of all the electrical properties of the PTC element, save the equipment investment, the personnel cost and the inspection operation time, the test method has uniform standard, the test data is stable and has comparability, and the standard inspection report can be output and whether the product is qualified or not can be judged; the impact current value of the PTC heater can be estimated.

Description

Full-automatic comprehensive electric performance testing device for PTC element

Technical Field

The utility model relates to an electricity field especially relates to PTC component electrical property test technique, especially a full-automatic electric properties of PTC component synthesizes verifying attachment.

Background

The PTC element has the characteristics of constant temperature heating, no open fire, safety, reliability and simple use. As the heating element, the PTC element has been widely used in a heater unit, an air conditioner, and a heating system of a new energy vehicle. The PTC element is a key element, is generally applied to high-voltage occasions and is a product with high risk level, so that the performance of the PTC element must be comprehensively detected to ensure that the product meets the quality requirement in the production process, and no functional problem or safety problem occurs in the use process.

Most production enterprises can carry out full inspection on the appearance of products in the production process. The key electrical performance indexes such as impact current (or normal temperature resistance), electrode current resistance, voltage resistance and the like are fully detected by automatic equipment to ensure the performance reliability of the product. For other electrical properties of the PTC element, before the product is shipped, the hose part can detect all the electrical properties of the PTC element, such as surface temperature, breakdown voltage resistance (volt-ampere characteristic), temperature rise rate (time-current characteristic) and the like, and a certain amount of sampling inspection can be performed to ensure the product quality.

For professional manufacturers, various detection devices are configured. These test devices include a large number of devices such as a room temperature resistance tester, an impulse current tester, a balance current tester, a voltage-withstanding tester (including an electrode current-withstanding capability and a breakdown voltage-withstanding test), a surface temperature tester, a time-current tester (detecting a temperature rise rate), and a volt-ampere characteristic tester (detecting a breakdown voltage-withstanding test). These specialized equipment require a significant capital investment and a yearly check-up. In the unit of use and development of the PTC element, it is impossible to provide these complete detection devices, and the performance of the PTC element cannot be detected. Once a quality problem occurs in the PTC element, it is found in a later production process, and then the loss is large.

Meanwhile, the manufacturing unit needs to be equipped with a professional inspector, which takes a lot of time every day to test the electrical properties of the PTC element. Moreover, because the devices and the test methods of all the using units are not uniform, the standards are not uniform, and the error of the test data is large (such as impact current and surface temperature), a plurality of misjudgments and disputes are caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is the great problem of the comprehensive inspection degree of difficulty of PTC component electrical property among the prior art.

In order to solve the technical problem, the utility model provides a full-automatic comprehensive electrical performance testing device for PTC elements, which comprises an operating platform and a relatively closed box body formed by baffles and an automatic lifting door which are positioned around the operating platform, wherein, a PTC element jig for clamping N PTC elements is arranged on the operating platform, N is an integer which is more than or equal to 1, the PTC element jig comprises a PTC element clamping groove, a clamping groove lifting mechanism, a module automatic sliding table and a probe ejection mechanism,

the module automatic sliding table is arranged on the operating table through a sliding table module, the clamping groove lifting mechanism is fixed on the module automatic sliding table through a connecting piece, the probe ejection mechanisms are arranged on the front side and the rear side of the PTC element clamping groove,

the clamping groove lifting mechanism comprises clamping groove lifting cylinders arranged at the left side and the right side of the PTC element clamping groove,

the probe ejection mechanism comprises a driving element for driving the probe to move and probes 4 times N in number, wherein the probes 2 times N in number are positioned on the front side of the PTC element clamping groove and are arranged up and down, the probes 2 times N in number are positioned on the rear side of the PTC element clamping groove and are arranged up and down,

the box body is internally provided with a data detection and processor which is connected with the control end of the clamping groove lifting cylinder through a control line, the data detection and processor is connected with the control end of a driving element in the probe ejection mechanism through the control line,

the data detection and processor comprises N voltage signal output ends and N current signal output ends, any one of the voltage signal output ends and any one of the current signal output ends are respectively connected with a probe through a lead,

the data detection and processor comprises a grounding signal end which is connected with 2 times of N probes,

the temperature detection module is arranged on a box body cross beam or an operation table support above the PTC element jig, and comprises an infrared temperature measurement probe which is connected with the data detection and processor through a signal line.

Further, the temperature detection module includes two slip table modules, infrared temperature probe set up two slip table modules on, the control end of two slip table modules pass through the control line with data detection and treater connect, infrared temperature probe has the direction of motion of X axle and Y axle in two slip table modules, the X axle is perpendicular with the Y axle.

Furthermore, a through hole with a mesh enclosure is arranged in the baffle above the operating platform, a heat radiation fan is arranged in the box body, and the through hole is communicated with an air outlet of the heat radiation fan.

Furthermore, a display unit is arranged on the box body, and the input end of the display unit is connected with the data detection and processor.

Further, the data detection and processing unit comprises a printer interface.

Further, the interval between two adjacent probes is at least larger than 10 mm.

Further, the driving element in the probe ejection mechanism is composed of an air cylinder.

Further, the PTC device card slot has a length to accommodate N +1 PTC devices.

Furthermore, the card slot lifting mechanism drives the PTC element card slot to ascend or descend under the control of the data detection and processor, after the PTC element card slot ascends to the right position, the N PTC elements are placed in the PTC element card slot, the PTC elements are arranged in a row, the PTC elements are clamped by the probe ejection mechanisms on the front side and the rear side of the PTC element card slot, the front side and the rear side of each PTC element correspond to the two probes respectively, the two probes positioned on the same side are arranged up and down, after the probes are ejected out by the probe ejection mechanisms under the control of the data detection and processor, the PTC elements with the corresponding positions are clamped by the four probes from the front side and the rear side, and after the PTC elements are clamped, the card slot lifting mechanism drives the PTC element card slot to descend and separate from the PTC elements; the testing voltage and current are applied to the corresponding PTC elements through the probes, and the data detection and processor obtains corresponding detection data through the probes. The temperature detection module transmits the surface temperature of the PTC element back to the data detection and processor. The heat dissipation fan dissipates the heat in the box body through the through hole. And the data detection and processor analyzes and processes the received data into a dynamic curve and then sends the dynamic curve to the display unit for displaying. The output data of the data detection and processor can be printed out through a printer. The spacing between any two adjacent sheets of PTC elements is at least greater than 10mm to prevent temperature interference. The sliding table module drives the automatic sliding table of the module to move to a set position, and the PTC element placed in the PTC element clamping groove can be guided into the fixed position of the PTC element jig.

It is specific, in the utility model discloses an automatic slip table of module, slip table module, draw-in groove lift cylinder, probe, data detection and treater, infrared ray temperature measurement probe and two slip table modules all can adopt the well-known technical scheme among the prior art, for example, data detection and the treater can adopt the industrial control computer, and the technical scheme that is described above is all known to the technical personnel in this field, no longer gives unnecessary details here.

Compared with the prior art, the utility model, its effect is positive and obvious. The utility model discloses to the problem that current PTC component capability test exists, provide a full-automatic comprehensive inspection equipment of PTC component electrical property, can realize almost all electric property's test with a machine to can automize and accomplish, and judge whether qualified according to the standard product, and output standard's detection report. The conventional performance of the PTC elements can be rapidly detected and judged, the conventional inspection time of 16 PTC elements in one batch only needs 30min, all the problems pointed out in the background art are solved at one time, and the method has great significance for the quality control of the PTC elements and the standardization work of the industry. A large amount of equipment investment is saved, and about 8 independent devices are integrated into a comprehensive device; the full-automatic test of the inspection process is realized, and manual participation is not needed; professional inspectors are not needed, so that the personnel cost is saved, and a large amount of inspection operation time is saved; the test method has unified standard, stable test data and comparability; a standard inspection report can be output, and whether the product is qualified or not can be directly judged according to the standard; the impact current value of the PTC heater can be estimated; a large number of data records may be provided for analytical studies.

Drawings

Fig. 1 is a schematic general structural diagram of a fully automatic comprehensive electrical performance testing device for PTC elements according to an embodiment of the present invention;

fig. 2 is a front view of a fully automatic comprehensive testing device for electrical properties of PTC elements according to an embodiment of the present invention;

fig. 3 is a side view of a fully automatic comprehensive testing device for electrical properties of PTC elements according to an embodiment of the present invention;

fig. 4 is a front view of the device inside the case according to an embodiment of the present invention;

fig. 5 is a top view of the device inside the case according to an embodiment of the present invention;

fig. 6 is a side view of one direction of the device inside the case according to one embodiment of the present invention;

fig. 7 is a side view of the device inside the case in another direction according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples.

As shown in fig. 1 to fig. 3, the fully automatic comprehensive electrical performance testing device for PTC elements provided by this embodiment includes an operation platform 1 and a box 2 composed of baffles and an automatic lifting door 2-1 located around the operation platform 1. The box body 2 plays a role in protection, and the operation table 1 is positioned in a relatively closed space in the box body 2. The baffle above the operating table 1 is provided with a through hole with a mesh enclosure and a heat dissipation fan, and the heat dissipation fan dissipates the heat in the box body 2 through the through hole. Both the right and left sides of the console 1 are provided with two-hand start button switches 3, and the equipment is started by activating the button switches 3 with both hands.

The PTC element fixture 4 is fixed to the operation table 1. The PTC device fixture 4 can hold a certain number (for example, 16 pieces) of PTC devices at a time. Referring to fig. 4 to 7, a two-axis module 5 is disposed above the PTC device jig 4, and an infrared probe capable of moving freely is disposed on a cross beam of the two-axis module 5. The two-axis module 5 drives the infrared probe to move along the X-axis and Y-axis directions under the control of the data detection and processor, so that the infrared probe moves to a target position, the surface temperature of the PTC element is tested, and the obtained test data is transmitted back to the data detection and processor. And a computer display 2-2 is arranged at the right upper corner of the front surface of the box body and is used for displaying various dynamic characteristic curves obtained through the data detection and processor. The data detection and processor is used for detecting and controlling the whole test system and is fixed in the box body. The back of the box body is provided with a power input end and a printing output end. The power supply supplies power to the whole test system through the power supply input end, and the printer is connected to the data detection and processor through the printing output port, so that data and graphs output by the data detection and processor can be printed.

Referring to fig. 4 to 7, the PTC device jig 4 includes a PTC device slot 4-1, and the PTC device slot 4-1 is driven to ascend and descend by a slot ascending and descending cylinder 4-2. After the PTC element clamping groove 4-1 is lifted to the right position, a plurality of PTC elements are manually placed into the PTC element clamping groove 4-1, and then the PTC elements are guided into the fixed position of the jig through the automatic module sliding table 4-3. And then 4 probes 4-5 positioned in front of and behind each PTC element are ejected out through 4 fixed cylinders 4-4, and the corresponding PTC elements are pressed by the 4 probes 4-5 from the front and back directions. The 2 probes 4-5 positioned on the same side are arranged up and down. Then the clamping groove lifting cylinder 4-2 drives the PTC element clamping groove 4-1 to descend to the PTC element and the PTC element clamping groove 4-1 to be separated, and the PTC element clamping groove 4-1 is prevented from being heated at high temperature during testing of the PTC element. The plane of the jig is covered with a mica sheet or a Teflon plate, so that the jig plate is prevented from being scalded by high temperature falling fragments when the PTC element is broken down. A large wind fan is arranged below the PTC element jig 4 so as to cool the PTC element when needed. The distance between two adjacent PTC elements clamped by the probes 4-5 is about 60mm, so that the situation that the adjacent PTC elements are too close to cause temperature interference and influence on the test is avoided.

The current and voltage are applied to the PTC element through the probe 4-5 to complete the test, and the data detection and processor obtains corresponding detection data through the probe 4-5.

This check out test set suitability: 1) the PTC element tester is suitable for testing the voltage of a PTC element at 12-900 VAC or DC. 2) Suitable dimensions for testing PTC are (10-35) length by (5-30) thickness by (1.5-3.5) mm. By replacing the clamp, the PTC element with the diameter of 6-30 mm can be tested.

Specifically, the operation process of the fully automatic comprehensive electric property testing device for the PTC element provided by the embodiment includes the following steps:

1. and starting the computer to set parameters.

Input product information, such as date of material, lot number, quantity, specification, supplier, etc.

Selecting items to be tested

Set the test conditions for this specification.

The flow, the test time, the test voltage, the infrared reflection coefficient, the withstand voltage and other parameters of each test item. As in the following table:

the technical standard (upper and lower limits), AQ L, quality judgment standard of the specification product is set as follows:

after the parameters are set, the standard files named as the specification models are stored so as to be called at any time later.

2. The PTC element is placed in the PTC element clamping groove 4-1, the PTC element is led into the test fixture through the module automatic sliding table 4-3, and the automatic lifting door 2-1 is lowered.

3. Boot test

The focus of the infrared tester is first adjusted to the center of the side edge of the PTC element. And then starting up for testing.

A: and (3) testing the normal temperature resistance: in order to eliminate contact resistance and clamping stability, the clamp adopts a four-probe design. By replacing the clamp, the PTC element with the diameter of 6-30 mm can be tested.

B: and (3) impact current testing: with a high speed corresponding current meter, the current can be selected to be an average or root mean square value. The current-time I-t curve is also shown. If the PTC breaks down (short circuit, severe ablation of the electrodes, breakage) a rapid power cut is required.

C: and (3) balance current testing: and electrifying at the rated voltage until the current reaches the current balance.

D: surface temperature test: an infrared temperature tester is adopted to focus the cursor on the center of the side surface of the PTC element, and the maximum surface temperature of the side edge when the current is balanced is tested in a power-on mode. The temperature-time T-T curve is also displayed.

E: and (3) testing the temperature rise time: the time required from start-up to the time when the PTC element reaches maximum current.

F: calculating the temperature rise speed: temperature/warm-up time from start of start-up to maximum current.

G: electrode current resistance performance: and electrifying under the rated voltage of 1.5 times, testing whether the current has jump or spike current in the electrifying process, and observing the ablation degree of the electrode surface by visual observation. While the pulse current spikes are shown on the I-t curve. If the PTC breaks down (short circuit, severe ablation of the electrodes, breakage) a rapid power cut is required.

And H, performing voltage withstand test, namely electrifying 60S under the rated voltage of 1.5 times, then increasing the voltage to a set value (such as 800VAC) at a constant speed of 100V/S, keeping 60-180S under the voltage, if the PTC breaks down (short circuit, serious electrode ablation and breakage), quickly cutting off a power supply, needing a 16-path 2A quick overcurrent protection switch and simultaneously having a double-color (red and green) L ED lamp to display the state.

I: breakdown voltage resistance test: after the voltage resistance test is finished, the voltage of the PTC qualified in the voltage resistance test is continuously increased, the voltage increasing speed is 50V/S, and the power supply is quickly cut off at the moment when the current starts to rise on the volt-ampere characteristic curve, so that the clamp is protected, and the safety hazard caused by breakdown is prevented. After the test was completed, the fan completely cooled the PTC and the fixture for 180 seconds.

J: and (3) testing a volt-ampere characteristic curve: the relationship between the voltage and the current of the PTC element is shown. Under the condition that the PTC is completely cooled, the voltage boosting speed is 10-50V/S until the current-voltage characteristic curve is reached, the current voltage value is recorded at the moment when the current starts to rise, and the power supply is quickly cut off, so that the clamp is protected, and safety hazards caused by breakdown are prevented. After the test was completed, the PTC and the jig were cooled by the fan for 180 seconds, and the current-voltage characteristic U-I curve was displayed.

K: estimating the impact current of the component: a certain number of PTC elements (the number of PTC elements is required for the package row), are energized and then the maximum current is tested. And correcting according to the heat dissipation coefficient to obtain an estimated value of the impact current of the heater, and displaying an impact current-time I-t curve.

4. And after the test is finished, displaying the inspection data on a screen, judging the result, and storing the file into a corresponding folder.

5. And printing out a check report.

It should be understood that the terms of orientation of up, down, left, right, front, back, top, bottom, etc., referred to or may be referred to in this specification, are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed accordingly depending on the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the method of the present invention, and such modifications and additions are also considered to be within the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a verifying attachment is synthesized to full-automatic electric property of PTC component, includes the operation panel and by being located the relative confined box that baffle and automatic rising door around the operation panel formed, its characterized in that: the operating platform is provided with a PTC element jig for clamping N PTC elements, N is an integer greater than or equal to 1, the PTC element jig comprises a PTC element clamping groove, a clamping groove lifting mechanism, a module automatic sliding table and a probe ejection mechanism,

2. A PTC element full automatic electric performance comprehensive test device according to claim 1, wherein: the temperature detection module comprises a two-axis sliding table module, the infrared temperature measurement probe is arranged on the two-axis sliding table module, the control end of the two-axis sliding table module is connected with the data detection and processor through a control line, the infrared temperature measurement probe has the motion direction of an X axis and a Y axis in the two-axis sliding table module, and the X axis is perpendicular to the Y axis.

3. A PTC element full automatic electric performance comprehensive test device according to claim 1, wherein: the baffle above the operation table is internally provided with a through hole with a mesh enclosure, a heat radiation fan is arranged in the box body, and the through hole is communicated with an air outlet of the heat radiation fan.

4. A PTC element full automatic electric performance comprehensive test device according to claim 1, wherein: the box body is provided with a display unit, and the input end of the display unit is connected with the data detection and processor.

5. A PTC element full automatic electric performance comprehensive test device according to claim 1, wherein: the data detection and processor includes a printer interface.

6. A PTC element full automatic electric performance comprehensive test device according to claim 1, wherein: the interval between two adjacent probes is at least more than 10 mm.

7. A PTC element full automatic electric performance comprehensive test device according to claim 1, wherein: the driving element in the probe ejection mechanism is composed of a cylinder.

8. A PTC element full automatic electric performance comprehensive test device according to claim 1, wherein: the PTC device card slot has a length to accommodate N +1 PTC devices.