CN210427706U - Testing device for detecting breakdown voltage of diaphragm - Google Patents
Testing device for detecting breakdown voltage of diaphragm Download PDFInfo
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- CN210427706U CN210427706U CN201920913490.2U CN201920913490U CN210427706U CN 210427706 U CN210427706 U CN 210427706U CN 201920913490 U CN201920913490 U CN 201920913490U CN 210427706 U CN210427706 U CN 210427706U
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Abstract
The utility model relates to a testing arrangement for detecting diaphragm breakdown voltage, this testing arrangement includes: the device comprises an upper electrode plate, a lower electrode plate and a boosting test circuit; the boosting test circuit is electrically connected with the upper electrode plate and the lower electrode plate; the boosting test circuit is suitable for applying boosting voltage to a diaphragm placed between an upper electrode plate and a lower electrode plate through the upper electrode plate and the lower electrode plate so as to break down the diaphragm; and the boost test circuit is suitable for detecting the breakdown voltage value of the diaphragm when the diaphragm is broken down; the utility model discloses a diaphragm to between the two plate electrodes carries out the diaphragm breakdown and detects the breakdown voltage value, has realized the function of the regional breakdown voltage data short-term test that a roll diaphragm tested to can make statistics of the minimum breakdown voltage in the face area of diaphragm, can be used for the fixed voltage to break the point statistics simultaneously, mention the last electric polar plate under the condition that keeps uninterrupted voltage, remove the diaphragm test region, judge the full regional breakdown condition of diaphragm under a certain voltage.
Description
Technical Field
The utility model relates to a diaphragm detection area especially relates to a testing arrangement for detecting diaphragm breakdown voltage.
Background
With increasing environmental demands, the rapid development of energy storage devices and portable power sources has also been followed. People have increased demand for electronic products, popularization of power automobiles and popularization and application of household energy storage equipment, so that lithium ion batteries with high energy density and high volume energy density are more concerned by people, but the safety problem brought by the lithium ion batteries is also paid further attention. The diaphragm used for separating the positive electrode and the negative electrode in the lithium battery plays an extremely important role in the safety performance of the lithium battery. When the breakdown voltage of the diaphragm is small in the process of manufacturing the battery cell, the breakdown voltage is likely to degrade when a high-voltage electrical insulation test (HI-POT) is performed, so that the loss of the battery cell is caused, and the production yield is influenced. At electric core normal during operation, electric core through manifold cycles after, the inside polarization of electric core is great, appears dendritic crystal easily, if diaphragm breakdown voltage is less this moment, forms and punctures, causes electric core short circuit, and serious directness causes the explosion, can cause very big influence to personal safety, production life.
The instrument for testing the breakdown voltage such as CN104090217A utility model can only detect the breakdown voltage of a less position of diaphragm, and the method is time-consuming and labor-consuming and has complex operation. The whole membrane surface of the diaphragm is measured, and repeated sampling and adjustment are needed. The utility model discloses a breakdown voltage of diaphragm under can not detecting a great area, the whole minimum breakdown voltage of detection diaphragm that can not be fine like this.
Like CN207366690U utility model, two electrode board measurement diaphragm samples must be cut out kind and handle, need the outage to measure repeatedly again after the single test and boost pressure and puncture, can not be used for getting the lasting high-pressure measurement of putting new diaphragm test. In actual production, the diaphragms wound in the battery cells are large in area, and the diaphragms are usually cut into fixed specifications by taking a coil as a unit, so that time and labor are wasted, test operation needs to be simplified, and breakdown voltage is more conveniently detected.
Like CN208188252U utility model, unwinding device is received in the cooperation, and fixed high-voltage measurement between two conducting rollers can test out the puncture condition of current sample under a certain voltage, nevertheless can't test out the minimum breakdown voltage numerical value in the large tracts of land diaphragm to obtain the minimum breakdown voltage and the appraisal of whole test diaphragm.
Therefore, it is desirable to develop a new testing device for detecting the breakdown voltage of the diaphragm to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a testing arrangement for detecting diaphragm breakdown voltage to solve
In order to solve the technical problem, the utility model provides a testing arrangement for detecting diaphragm breakdown voltage which includes: the device comprises an upper electrode plate, a lower electrode plate and a boosting test circuit; the boosting test circuit is electrically connected with the upper electrode plate and the lower electrode plate; the boosting test circuit is suitable for applying boosting voltage to a diaphragm placed between an upper electrode plate and a lower electrode plate through the upper electrode plate and the lower electrode plate so as to break down the diaphragm; and the boost test circuit is suitable for detecting the breakdown voltage value of the diaphragm when the diaphragm is broken down.
Furthermore, the upper electrode plate and the lower electrode plate are both provided with metal positioning sheets, and two electrode outgoing line clamps of the boosting test circuit are respectively connected with the corresponding metal positioning sheets.
Further, a lifting handle for lifting is arranged on the upper electrode plate.
Furthermore, the plate edge sides of the upper electrode plate and the lower electrode plate are chamfered, and the radius of the chamfer is 1-2 mm.
Further, the membrane is connected to a membrane roller, i.e. said membrane roller is adapted to roll the membrane for a movement test.
Furthermore, the output voltage rising speed of the boosting test circuit is 0.2-1kV/S, the breakdown current is not more than 5.00mA, and the output voltage is not more than 6 kV.
Furthermore, the upper electrode plate is made of tin bronze and is connected with an anode leading-out wire clamp of the boosting test circuit through a metal positioning sheet on the upper electrode plate; the lower electrode plate is made of tin bronze and is connected with a negative leading-out wire clamp of the boosting test circuit through a metal positioning sheet on the lower electrode plate.
Furthermore, the handle is made of tin bronze and wrapped by an insulating rubber sheet.
The beneficial effects of the utility model are that, the utility model discloses a carry out the diaphragm breakdown and detect the breakdown voltage value to the diaphragm between the two plate electrodes, realized the function that the regional breakdown voltage data that a roll diaphragm tested detected short-term test to can make statistics of the minimum breakdown voltage in the face area of diaphragm, can be used for fixed voltage to break the point statistics simultaneously, mention the last polar plate under the condition that keeps uninterrupted voltage, remove the diaphragm test region, judge the full regional breakdown condition of diaphragm under a certain voltage.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a structural diagram of the testing device for detecting the breakdown voltage of the diaphragm according to the present invention.
In the figure: an upper electrode plate 1, an upper electrode plate metal positioning sheet 101 and a handle 102;
a lower electrode plate 2 and a lower electrode plate metal positioning sheet 201;
a diaphragm 3 and a diaphragm roller 4.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Example 1
Fig. 1 is a structural diagram of the testing device for detecting the breakdown voltage of the diaphragm according to the present invention.
In the present embodiment, as shown in fig. 1, the present embodiment provides a test apparatus for detecting a breakdown voltage of a diaphragm, including: the device comprises an upper electrode plate, a lower electrode plate and a boosting test circuit; the boosting test circuit is electrically connected with the upper electrode plate and the lower electrode plate; the boosting test circuit is suitable for applying boosting voltage to a diaphragm 3 arranged between an upper electrode plate 1 and a lower electrode plate 2 through the upper electrode plate and the lower electrode plate so as to break down the diaphragm 3; and the boost test circuit is adapted to detect the value of the breakdown voltage of the membrane 3 when it is broken down.
In this embodiment, the boost test circuit may be, but is not limited to, a JB7120 ac/dc withstand voltage tester.
In this embodiment, the septum has a length of 200-2000mm, preferably a width of 1100mm, and a width of 50-800mm, preferably 400 mm; the membrane has a thickness of 1-30mm, preferably 15 mm.
In this embodiment, the diaphragm breakdown and the breakdown voltage value detection are performed on the diaphragm between the two electrode plates, so that the function of rapidly detecting the breakdown voltage data of the area tested by one roll of diaphragm is realized, the lowest breakdown voltage in the area of the diaphragm can be counted, the fixed voltage breakdown point can be counted, the upper electrode plate is lifted under the condition of keeping the voltage, the diaphragm testing area is moved, and the full-area breakdown condition of the diaphragm under a certain voltage is judged.
In order that the boosting test circuit can provide breakdown voltage generated between the upper electrode plate and the lower electrode plate for the diaphragm and detect the breakdown voltage value, the upper electrode plate and the lower electrode plate are both provided with metal positioning sheets, and two electrode outgoing line clamps of the boosting test circuit are respectively connected with the corresponding metal positioning sheets.
In this embodiment, as shown in fig. 1, an upper electrode plate metal positioning sheet 101 is disposed on the upper electrode plate, and the upper electrode plate metal positioning sheet 101 is adapted to be connected to an anode outgoing line clip of the boost test circuit; the lower electrode plate is provided with a lower electrode plate metal positioning sheet 201, and the upper electrode plate metal positioning sheet 201 is suitable for being connected with a negative leading-out wire clamp of the boosting test circuit.
In order to facilitate the rapid replacement of the membrane test area, the upper electrode plate is provided with a lifting handle 102 for lifting.
In order to avoid scratching the diaphragm, the plate edge sides of the upper electrode plate and the lower electrode plate are respectively provided with a chamfer, and the radius of each chamfer is 1-2 mm.
In the present embodiment, the radius of the chamfer is preferably 1.5 mm.
In order to facilitate that the membrane can quickly measure the whole membrane surface of the membrane, the membrane 3 is connected with a membrane roller 4, i.e. the membrane roller 4 is suitable for rolling the membrane 3 to perform a movement test.
Specifically, the output voltage rising speed of the boost test circuit is 0.2-1kV/S, the breakdown current is not more than 5.00mA, and the output voltage is not more than 6 kV.
In this embodiment, as an embodiment, the breakdown voltage value when the output voltage rising speed of the boost test circuit is 0.2kV/S, that is, when the breakdown of the diaphragm is detected, is more accurate.
In this embodiment, as another embodiment, the test efficiency of the test apparatus is higher when the output voltage rising speed of the boost test circuit is 1kV/S, that is, the time when the breakdown of the diaphragm is detected is shorter.
Specifically, the upper electrode plate is made of tin bronze and is connected with an anode leading-out wire clamp of the boosting test circuit through a metal positioning sheet on the upper electrode plate; the lower electrode plate is made of tin bronze and is connected with a negative leading-out wire clamp of the boosting test circuit through a metal positioning sheet on the lower electrode plate.
In this embodiment, as an implementation manner, the specification of the upper electrode plate is suitable for adopting 450mm × 180mm × 3mm, and the surface roughness Ra 0.8; the specification of the lower electrode plate is suitable for 500mm 200mm 3mm, and the surface roughness is Ra0.8.
In the embodiment, the surfaces of the upper electrode plate and the lower electrode plate, which are in contact with the diaphragm, are flat and smooth, and the surface roughness is Ra0.2-Ra1.6, preferably Ra0.8.
Specifically, the handle is made of tin bronze and wrapped with an insulating rubber sheet.
In this embodiment, the defects of the existing diaphragm are often caused by the abnormal point of the lowest breakdown voltage, and the testing device can detect the breakdown of any lowest point of the diaphragm surface to obtain data, can quickly detect all the surfaces, and effectively prevents the defects.
To sum up, the utility model discloses a carry out the diaphragm breakdown and detect the breakdown voltage value to the diaphragm between two plate electrodes, realized the regional breakdown voltage data rapid detection's that a roll of diaphragm was tested function to can make statistics of the regional interior minimum breakdown voltage of diaphragm, can be used for fixed voltage to break down some statistics simultaneously, lift up the upper electrode plate under the condition that keeps uninterrupted voltage, remove the diaphragm test area, judge the full regional breakdown condition of diaphragm under certain voltage; the utility model aims to solve the problem that the whole membrane face to the diaphragm that the withstand voltage test of the diaphragm among the prior art can not be quick is measured, the minimum breakdown voltage numerical value condition of whole diaphragm of unable sign.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. A test device for detecting a membrane breakdown voltage, comprising:
the device comprises an upper electrode plate, a lower electrode plate and a boosting test circuit;
the boosting test circuit is electrically connected with the upper electrode plate and the lower electrode plate;
the boosting test circuit is suitable for applying boosting voltage to a diaphragm placed between an upper electrode plate and a lower electrode plate through the upper electrode plate and the lower electrode plate so as to break down the diaphragm; and
the boost test circuit is adapted to detect a breakdown voltage value of the diaphragm when broken down.
2. The test apparatus of claim 1,
the upper electrode plate and the lower electrode plate are both provided with metal positioning sheets, and two electrode outgoing line clamps of the boosting test circuit are respectively connected with the corresponding metal positioning sheets.
3. The test apparatus of claim 1,
and a lifting handle for lifting is arranged on the upper electrode plate.
4. The test apparatus of claim 1,
the plate edge sides of the upper electrode plate and the lower electrode plate are respectively provided with a chamfer, and the radius of each chamfer is 1-2 mm.
5. The test apparatus of claim 1,
diaphragm-coupled diaphragm rollers, i.e.
The membrane roller is suitable for rolling the membrane to carry out the mobile test.
6. The test apparatus of claim 1,
the output voltage of the boosting test circuit is increased by 0.2-1kV/S, the breakdown current is not more than 5.00mA, and the output voltage is not more than 6 kV.
7. The test apparatus of claim 2,
the upper electrode plate is made of tin bronze and is connected with a positive leading-out wire clamp of the boosting test circuit through a metal positioning sheet on the upper electrode plate;
the lower electrode plate is made of tin bronze and is connected with a negative leading-out wire clamp of the boosting test circuit through a metal positioning sheet on the lower electrode plate.
8. The test apparatus of claim 3,
the handle is made of tin bronze and is wrapped by an insulating rubber sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913490.2U CN210427706U (en) | 2019-06-18 | 2019-06-18 | Testing device for detecting breakdown voltage of diaphragm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913490.2U CN210427706U (en) | 2019-06-18 | 2019-06-18 | Testing device for detecting breakdown voltage of diaphragm |
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| CN210427706U true CN210427706U (en) | 2020-04-28 |
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| CN201920913490.2U Active CN210427706U (en) | 2019-06-18 | 2019-06-18 | Testing device for detecting breakdown voltage of diaphragm |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812470A (en) * | 2020-07-21 | 2020-10-23 | 上海恩捷新材料科技有限公司 | Method for testing continuous voltage resistance of film |
| CN114779032A (en) * | 2022-06-22 | 2022-07-22 | 深圳市博盛新材料有限公司 | Breakdown voltage testing device for lithium ion battery diaphragm |
| CN116660787A (en) * | 2023-06-09 | 2023-08-29 | 上海韵量新能源科技有限公司 | Proton exchange membrane detection method and device, electronic equipment and medium |
-
2019
- 2019-06-18 CN CN201920913490.2U patent/CN210427706U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812470A (en) * | 2020-07-21 | 2020-10-23 | 上海恩捷新材料科技有限公司 | Method for testing continuous voltage resistance of film |
| CN111812470B (en) * | 2020-07-21 | 2021-05-04 | 上海恩捷新材料科技有限公司 | Method for testing continuous voltage resistance of film |
| WO2022016923A1 (en) * | 2020-07-21 | 2022-01-27 | 上海恩捷新材料科技有限公司 | Method for continuous testing of voltage resistance of thin film |
| CN114779032A (en) * | 2022-06-22 | 2022-07-22 | 深圳市博盛新材料有限公司 | Breakdown voltage testing device for lithium ion battery diaphragm |
| CN116660787A (en) * | 2023-06-09 | 2023-08-29 | 上海韵量新能源科技有限公司 | Proton exchange membrane detection method and device, electronic equipment and medium |
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