CN207366455U - A kind of lithium battery diaphragm comprehensive test device - Google Patents
A kind of lithium battery diaphragm comprehensive test device Download PDFInfo
- Publication number
- CN207366455U CN207366455U CN201721355268.2U CN201721355268U CN207366455U CN 207366455 U CN207366455 U CN 207366455U CN 201721355268 U CN201721355268 U CN 201721355268U CN 207366455 U CN207366455 U CN 207366455U
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- lithium battery
- battery diaphragm
- photodetector
- area source
- test
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Abstract
The utility model discloses a kind of lithium battery diaphragm test device, including：The image collection module that first area source, the first photodetector, the second area source, the second photodetector, the 3rd photodetector and the 4th photodetector form, ventilative test cell, upper heating unit, lower heating unit, top electrode, the multifunctional testing module of bottom electrode composition, extension test unit.Multifunctional testing module in the utility model can simulate performance of the lithium battery diaphragm under the comprehensive function that high temperature, pressure, voltage puncture；Image collection module obtains the surface image of lithium battery diaphragm using area source with photoelectric detection module；Extension test unit is placed in image collection module, conveniently detect the thickness change of lithium battery diaphragm and be likely to occur holes the defects of.The utility model can realize the all-round property testing of lithium battery diaphragm, reflect performance of the lithium battery diaphragm under various test conditions comprehensively.
Description
Technical field
The present invention relates to a kind of membrane detection device and method, is suitable for lithium battery diaphragm integration test more particularly to one kind
Apparatus and method.
Background technology
Diaphragm material is the higher link of lithium electricity industrial chain technical threshold, be lithium battery structure in crucial interior layer assembly
One of.The performance of membrane determines the interfacial structure of battery, internal resistance etc., directly affects capacity, circulation and the security of battery
The characteristics such as energy.The main function of membrane is that the positive and negative electrode for making battery is separated, prevent the two poles of the earth contact and it is short-circuit, additionally have
There is the function that can pass through electrolyte ion.For lithium battery diaphragm, since electrolyte is organic solvent system, thus need
The diaphragm material of organic solvent-resistant.
Lithium ion battery separator product has polyethylene（PE）, polypropylene（PP）And composite membrane of PE and PP etc..Some are new
The diaphragm material of type such as polyimides, nanofiber, aramid fiber film and cellulose membrane also begin to enter market, due to these membranes
The preparation difficulty of material is bigger, and there are undesirable situation under big puncture strength or hot conditions.It is existing
The technology of detection in to(for) membrane measures the method for thickness frequently with optics side frequently with the method by measuring diaphragm thickness
Method, i.e., by irradiating membrane, gather and detect whether membrane is defective by way of image procossing through the light of membrane.But
It is that the film thickness error that this mode measures is larger, the characteristics such as high temperature or the puncture strength of membrane can not be accurately reflected.
The content of the invention
In order to solve above-mentioned technical problem existing in the prior art, the present invention provides a kind of lithium battery diaphragm synthesis to survey
Trial assembly is put.The lithium battery diaphragm comprehensive test device can be used for detecting the porosity of lithium electronic rupture, thickness evenness, breathe freely
The performances such as degree, mixing puncture, tensile elongation, ionic conductivity.
Lithium battery diaphragm comprehensive test device provided by the invention, including：First area source, the first photodetector,
The image collection module that two area sources, the second photodetector, the 3rd photodetector and the 4th photodetector form, breathes freely
Test cell, upper heating unit, lower heating unit, top electrode, the multifunctional testing module of bottom electrode composition, extension test list
Member, Input pressure roller, output press roll.
Described image acquisition module further comprises the first image acquisition unit and the second image acquisition unit；Described first
Image acquisition unit is made of the first area source, the first photodetector and the 3rd photodetector；Second image acquisition
Unit is made of the second area source, the second photodetector and the 4th photodetector.Described first image acquiring unit gathers
The lithium battery diaphragm image information before multifunctional testing is not carried out；The lithium battery diaphragm is rolled by Input pressure roller and output press roll
Dynamic transmission, between the first area source and the first photodetector, the 3rd photodetector and the first area source are located at lithium electricity
The same side of pond membrane；Second image acquisition unit is located at after multifunctional testing module, for gathering multifunctional testing
The image information of lithium battery diaphragm afterwards, likewise, the lithium battery diaphragm is located at the second area source and the second photodetection
Between device, the 4th photodetector and the second area source are located at the same side of lithium battery diaphragm.3rd photodetector and
As the effect of 4th photodetector, all the data collected can be sent to industrial personal computer by data processing, for as
The control group for the data that one photodetector and the second photodetector collect, due to area source, its is bright after working long hours
Degree can change so that can also change through the light intensity of lithium battery diaphragm, may be referred to the 3rd photodetector and the
The collection image of four photodetectors.
The multifunctional testing module is integrated in two briquettings up and down, and lithium battery diaphragm is among two briquettings, and two
A briquetting is driven by two cylinders, and the ventilative test cell includes linear motor, push rod, cavity, and the cavity is located above
Briquetting in, when carrying out ventilative test, upper and lower two briquettings can extrude lithium battery diaphragm at the same time, cavity directly with lithium battery every
Film connects, and oppresses cavity using the linear motor driving push rod so that the gas in cavity is discharged downwards, and lithium battery diaphragm
Then prevent the gas discharge in cavity；What can thus be moved downward according to linear motor can calculate away from discrete time
Go out the Air permenbility and air penetrability of lithium battery diaphragm.
The upper heating unit, lower heating unit are used for temperature test, it is located in upper and lower two briquettings respectively, when two
When briquetting extrudes lithium battery diaphragm, described two heating units heat lithium battery diaphragm, can carry out single one
Unit heating can also heat at the same time.
The top electrode, bottom electrode, which are used to mix, punctures test, wherein, top electrode is located in upper holder block, and bottom electrode is located at
In lower lock block, the puncture voltage that potential difference is u is loaded at described two electrode both ends, while it is big to measure the electric current in top electrode
It is small.
The multifunctional testing module of test in to(for) ventilative, temperature and puncture can carry out step by step, can also be at the same time
Carry out.The upper holder block and lower lock block are coarse surfaces close to the side of lithium battery diaphragm.The ventilative test cell
Cavity is through upper holder block, in cylindrical type；The temperature test unit includes heater strip, and the heater strip is located at upper and lower briquetting
Outside, be connected with positioned at upper and lower pressure heat-conducting silicone grease in the block, the cavity of cubic shaped, the chamber formed in upper lower lock block
Body covers one layer of heat conductive silica gel, which can be used for wrapping up heat-conducting silicone grease, and for being contacted with lithium battery diaphragm.
The extension test unit includes the stretching pull rod that stretching fixture block and two different directions are exerted oneself, and stretching fixture block includes
Zola stretches two symmetrical fixture blocks of fixture block and right stretching module, and lithium battery diaphragm is clamped for above-below direction, and in stretching fixture block
After clamping lithium battery diaphragm, then left and right firmly stretches lithium battery diaphragm to stretching pull rod.Fixture block is stretched to be drawn by solenoid actuated, stretching
Bar has pulling force sensor by driving stepper motor on the stretching pull rod, can sense the drawing being subject on stretching pull rod
Power.
The extension test unit is preferably placed between the second area source and the second photodetector, extension test unit
A part for image collection module is only occupied, the image change feelings of convenient detection lithium battery diaphragm in a stretched state are so set
Condition, image change before and after being stretched when carrying out stretching detection by control, to facilitate the thickness change for detecting lithium battery diaphragm
And be likely to occur holes the defects of.
Brief description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the side structure schematic view of the present invention.
Description of reference numerals
1st, Input pressure roller；2nd, lithium battery diaphragm；3rd, the first area source；4th, the first photodetector；5th, ventilative test cell；
6-1, upper heating unit；6-2, lower heating unit；7-1, top electrode；7-2, bottom electrode；8th, the second area source；9th, the second photoelectricity is visited
Survey device；10th, extension test unit；11st, output press roll；12nd, the 3rd photodetector；13rd, the 4th photodetector.
Embodiment
Embodiment 1
Lithium battery diaphragm comprehensive test device provided by the invention, as shown in Figure 1, including：First area source 3, the first light
Electric explorer 4, the second area source 8, the second photodetector 9, the 3rd photodetector 12 and the 4th photodetector 13 form
Image collection module, breathe freely test cell 5, upper heating unit 6-1, lower heating unit 6-2, top electrode 7-1, bottom electrode 7-2
The multifunctional testing module of composition, extension test unit 10, Input pressure roller 1, output press roll 11.
Described image acquisition module further comprises the first image acquisition unit and the second image acquisition unit；Described first
Image acquisition unit is made of the first area source 3, the first photodetector 4 and the 3rd photodetector 12；Second image
Acquiring unit is made of the second area source 8, the second photodetector 9 and the 4th photodetector 13.Described first image obtains
Unit collection does not carry out the lithium battery diaphragm image information before multifunctional testing；The lithium battery diaphragm 2 is by 1 He of Input pressure roller
11 roller transfer of output press roll, between the first area source 3 and the first photodetector 4, the 3rd photodetector 12 and
One area source 3 is located at the same side of lithium battery diaphragm 2；Second image acquisition unit is located at after multifunctional testing module,
For gathering the image information of the lithium battery diaphragm 2 after multifunctional testing, likewise, the lithium battery diaphragm 2 is located at second
Between 8 and second photodetector 9 of area source, the 4th photodetector 13 is located at the same of lithium battery diaphragm 2 with the second area source 8
Side.3rd photodetector 12 can all pass through the data collected as the effect of the 4th photodetector 13
Industrial personal computer is sent in data processing, for the control of the data collected as the first photodetector 4 and the second photodetector 9
Group, due to area source, its brightness can change after working long hours so that can also occur through the light intensity of lithium battery diaphragm 2
Change, may be referred to the collection image of the 3rd photodetector 12 and the 4th photodetector 13.
The multifunctional testing module is integrated in two briquettings up and down, and lithium battery diaphragm 2 is among two briquettings, and two
A briquetting is driven by two cylinders, and the ventilative test cell 5 includes linear motor, push rod, cavity, and the cavity is located above
Briquetting in, when carrying out ventilative test, upper and lower two briquettings can extrude lithium battery diaphragm at the same time, cavity directly with lithium battery every
Film connects, and oppresses cavity using the linear motor driving push rod so that the gas in cavity is discharged downwards, and lithium battery diaphragm
Then prevent the gas discharge in cavity；What can thus be moved downward according to linear motor can calculate away from discrete time
Go out the Air permenbility and air penetrability of lithium battery diaphragm.
The upper heating unit 6-1, lower heating unit 6-2 are used for temperature test, it is located in upper and lower two briquettings respectively,
When two briquettings extrude lithium battery diaphragm 2, described two heating units heat lithium battery diaphragm, can carry out individually
A unit heating can also heat at the same time.
The top electrode 7-1, bottom electrode 7-2, which are used to mix, punctures test, wherein, top electrode 7-1 is located in upper holder block, under
Electrode 7-2 is located in lower lock block, and at described two electrode both ends, loading potential difference is the puncture voltage of u, while measures top electrode
Size of current on 4-1.
The multifunctional testing module of test in to(for) ventilative, temperature and puncture can carry out step by step, can also be at the same time
Carry out.The upper holder block and lower lock block are coarse surfaces close to the side of lithium battery diaphragm.The ventilative test cell
Cavity is through upper holder block, in cylindrical type；The temperature test unit includes heater strip, and the heater strip is located at upper and lower briquetting
Outside, be connected with positioned at upper and lower pressure heat-conducting silicone grease in the block, the cavity of cubic shaped, the chamber formed in upper lower lock block
Body covers one layer of heat conductive silica gel, which can be used for wrapping up heat-conducting silicone grease, and for being contacted with lithium battery diaphragm 2.
The extension test unit 10 includes the stretching pull rod that stretching fixture block and two different directions are exerted oneself, and stretches fixture block bag
Include Zola and stretch two symmetrical fixture blocks of fixture block and right stretching module, clamp lithium battery diaphragm 2 for above-below direction, and press from both sides in stretching
After block clamps lithium battery diaphragm 2, then left and right firmly stretches lithium battery diaphragm 2 to stretching pull rod.Fixture block is stretched by solenoid actuated, is drawn
Pull rod is stretched by driving stepper motor, and there is pulling force sensor on the stretching pull rod, can be sensed and is subject on stretching pull rod
Pulling force.
The extension test unit 10 is preferably placed between the second area source 8 and the second photodetector 9, such as Fig. 1 institutes
Show, extension test unit 10 only occupies a part for image collection module, so sets convenient detection lithium battery diaphragm 2 stretching
Image change situation under state, image change before and after being stretched when carrying out stretching detection by control, lithium is detected to facilitate
The defects of thickness change of battery diaphragm and the holes being likely to occur.
Embodiment 2
The present invention also provides a kind of membrane integrated test facility：
Step 1, lithium battery diaphragm 2 are fixed and stretched by Input pressure roller 1 and output press roll 11, at the beginning of carrying out each test cell
Beginningization；
Step 2, industrial personal computer control collection the first image acquisition unit in view data, and using image processing algorithm into
Row processing, the thickness and porosity of the lithium battery diaphragm 2 preserved；
Step 3, industrial personal computer driving Input pressure roller 1 and output press roll 11 rotate, lithium battery diaphragm 2 travel forward it is fixed away from
The image sections obtained from so that the first image acquisition unit move to multifunctional testing module, then, industrial personal computer control cylinder to
Lower movement, upper lower lock block jam-packed lithium battery diaphragm 2, then industrial personal computer control linear motor driving push rod compressing cavity, record push away
The gas flow of bar push-in；
Step 4, the upper heating unit 6-1 of industrial personal computer control, lower heating unit 6-2 are heated at the same time, are stopped when reaching preset temperature
Only heat；Meanwhile industrial personal computer controls top electrode 7-1, bottom electrode 7-2 to apply the voltage that voltage difference is U, and record and flow through top electrode
Size of current in 7-1；
Step 5, industrial personal computer control cylinder cause lower lock block to be moved upwardly or downwardly, Input pressure roller 1 and output press roll 11
It is rotated further, lithium battery diaphragm 2 travels forward fixed range so that the lithium battery diaphragm Duan Yun that multifunctional testing module testing is crossed
Move to the second image acquisition unit, gather the view data in the second image acquisition unit and use at image processing algorithm
Reason, the thickness for the lithium battery diaphragm 2 that the thickness that is obtained according to the second view data is obtained with porosity with the first view data with
Porosity is compared.
Step 6, draw unit carry out extension test, and the view data of the lithium battery diaphragm 2 after stretching is carried out image
Processing Algorithm processing, and with carry out extension test before the lithium battery diaphragm 2 based on the second view data thickness and porosity
It is compared.
Step 7, industrial personal computer control input pressure roller 1 are rotated further with output press roll 11, to carry out next section of lithium battery diaphragm 2
Test.
The luminous intensity that each test cell initialization in the step 1 includes image collection module is adjusted, cylinder driving
Initialization, linear motor initialization.
Image processing algorithm in the step 5 and step 6 specifically includes following steps：
Step a, image preprocessing flow：It is followed successively by and reads picture, greyscale transformation, gaussian filtering, edge detection；
Step b, image vector：It is followed successively by Contour extraction, drafting polar plot, binary conversion treatment and obtains binary image；
Step c, the dimension data in the polar plot of drafting calculates the thickness and porosity of lithium battery diaphragm.
The present invention is described in detail above by embodiment and embodiment, but these are not composition pair
The limitation of the present invention.Without departing from the principles of the present invention, those skilled in the art can also make many deformations and change
Into these also should be regarded as protection scope of the present invention.
Claims (7)
- A kind of 1. lithium battery diaphragm comprehensive test device, it is characterised in that including：First area source, the first photodetector, The image collection module that two area sources, the second photodetector, the 3rd photodetector and the 4th photodetector form, breathes freely Test cell, upper heating unit, lower heating unit, top electrode, the multifunctional testing module of bottom electrode composition, extension test list Member, Input pressure roller, output press roll；Described image acquisition module further comprises the first image acquisition unit and the second image acquisition unit；Described first image Acquiring unit is made of the first area source, the first photodetector and the 3rd photodetector；Second image acquisition unit It is made of the second area source, the second photodetector and the 4th photodetector；Described first image acquiring unit collection not into Lithium battery diaphragm image information before row multifunctional testing；The lithium battery diaphragm is rolled by Input pressure roller and output press roll and passed Send, between the first area source and the first photodetector, the 3rd photodetector and the first area source be located at lithium battery every The same side of film；Second image acquisition unit is located at after multifunctional testing module, for after gathering multifunctional testing Lithium battery diaphragm image information；Likewise, the lithium battery diaphragm be located at the second area source and the second photodetector it Between, the 4th photodetector and the second area source are located at the same side of lithium battery diaphragm；3rd photodetector and the 4th As the effect of photodetector, all the data collected can be sent to industrial personal computer by data processing, for as the first light The control group for the data that electric explorer and the second photodetector collect, for adjusting the area source intensity of light source.
- 2. lithium battery diaphragm comprehensive test device as claimed in claim 1, it is characterised in that the multifunctional testing module collection Into in upper and lower two briquettings, among two briquettings, two briquettings are driven lithium battery diaphragm by two cylinders, described ventilative Test cell includes linear motor, push rod, cavity, in cavity briquetting located above, when carrying out ventilative test, up and down Two briquettings can extrude lithium battery diaphragm at the same time, and cavity is directly connected with lithium battery diaphragm, be pushed away using linear motor driving Bar oppresses cavity so that the gas in cavity is discharged downwards, and lithium battery diaphragm then prevents the gas in cavity from discharging；Thus What can be moved downward according to linear motor the Air permenbility and air penetrability of lithium battery diaphragm can be calculated away from discrete time.
- 3. lithium battery diaphragm comprehensive test device as claimed in claim 1, it is characterised in that the upper heating unit, add down Hot cell is used for temperature test, it is located in upper and lower two briquettings respectively, when two briquettings extrude lithium battery diaphragm, described two A heating unit heats lithium battery diaphragm, and can carry out single unit heating can also heat at the same time.
- 4. lithium battery diaphragm comprehensive test device as claimed in claim 1, it is characterised in that the top electrode, bottom electrode are used Test is punctured in mixing, wherein, top electrode is located in upper holder block, and bottom electrode is located in lower lock block, at described two electrode both ends Load potential difference and be the puncture voltage of u, while measure the size of current in top electrode.
- 5. lithium battery diaphragm comprehensive test device as claimed in claim 2, it is characterised in that the sky of the ventilative test cell Chamber is through upper holder block, in cylindrical type.
- 6. lithium battery diaphragm comprehensive test device as claimed in claim 3, it is characterised in that the temperature test unit includes Heater strip, the heater strip are located at the outside of upper and lower briquetting, are connected with positioned at upper and lower pressure heat-conducting silicone grease in the block, upper pushing The cavity of cubic shaped is formed in block, which covers one layer of heat conductive silica gel, which can be used for wrapping up heat-conducting silicone grease, And for being contacted with lithium battery diaphragm.
- 7. lithium battery diaphragm comprehensive test device as claimed in claim 1, the extension test unit include stretching fixture block and The stretching pull rod that two different directions are exerted oneself, stretching fixture block are stretched two symmetrical fixture blocks of fixture block and right stretching module including Zola, are used Lithium battery diaphragm is clamped in above-below direction, and after stretching fixture block clamps lithium battery diaphragm, then left and right pulls at stretching pull rod Stretch lithium battery diaphragm；Fixture block is stretched by solenoid actuated, stretching pull rod by driving stepper motor on the stretching pull rod to be had There is pulling force sensor, the pulling force being subject on stretching pull rod can be sensed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355268.2U CN207366455U (en) | 2017-10-20 | 2017-10-20 | A kind of lithium battery diaphragm comprehensive test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355268.2U CN207366455U (en) | 2017-10-20 | 2017-10-20 | A kind of lithium battery diaphragm comprehensive test device |
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| Publication Number | Publication Date |
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| CN207366455U true CN207366455U (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721355268.2U Expired - Fee Related CN207366455U (en) | 2017-10-20 | 2017-10-20 | A kind of lithium battery diaphragm comprehensive test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199990A (en) * | 2021-12-31 | 2022-03-18 | 中钢新型材料股份有限公司 | Device and method for measuring content of element impurities in ultra-pure graphite material |
| CN115633157A (en) * | 2022-12-23 | 2023-01-20 | 合肥惠强新能源材料科技有限公司 | Remote monitoring method and system for lithium battery diaphragm processing |
| CN116297112A (en) * | 2023-05-25 | 2023-06-23 | 上海联风气体有限公司 | Gas permeability detection equipment and detection method for polymer film |
-
2017
- 2017-10-20 CN CN201721355268.2U patent/CN207366455U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199990A (en) * | 2021-12-31 | 2022-03-18 | 中钢新型材料股份有限公司 | Device and method for measuring content of element impurities in ultra-pure graphite material |
| CN114199990B (en) * | 2021-12-31 | 2023-09-15 | 赛迈科先进材料股份有限公司 | Equipment and method for measuring impurity content of elements of ultra-high purity graphite material |
| CN115633157A (en) * | 2022-12-23 | 2023-01-20 | 合肥惠强新能源材料科技有限公司 | Remote monitoring method and system for lithium battery diaphragm processing |
| CN115633157B (en) * | 2022-12-23 | 2023-04-28 | 合肥惠强新能源材料科技有限公司 | Remote monitoring method and system for lithium battery diaphragm machining |
| CN116297112A (en) * | 2023-05-25 | 2023-06-23 | 上海联风气体有限公司 | Gas permeability detection equipment and detection method for polymer film |
| CN116297112B (en) * | 2023-05-25 | 2023-09-15 | 上海联风气体有限公司 | Gas permeability detection equipment and detection method for polymer film |
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