CN109142149A - A method of detection battery slurry dispersion stabilization - Google Patents
A method of detection battery slurry dispersion stabilization Download PDFInfo
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- CN109142149A CN109142149A CN201811025989.6A CN201811025989A CN109142149A CN 109142149 A CN109142149 A CN 109142149A CN 201811025989 A CN201811025989 A CN 201811025989A CN 109142149 A CN109142149 A CN 109142149A
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- 239000002002 slurry Substances 0.000 title claims abstract description 213
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000006185 dispersion Substances 0.000 title claims abstract description 39
- 230000006641 stabilisation Effects 0.000 title claims abstract description 37
- 238000011105 stabilization Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 title claims description 15
- 238000012360 testing method Methods 0.000 claims abstract description 28
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 9
- 229910001416 lithium ion Inorganic materials 0.000 claims description 9
- 238000010998 test method Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 39
- 239000007787 solid Substances 0.000 description 31
- 239000011267 electrode slurry Substances 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 10
- 238000004513 sizing Methods 0.000 description 10
- 239000002904 solvent Substances 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002356 laser light scattering Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
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- Chemical & Material Sciences (AREA)
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of method for detecting battery slurry dispersion stabilization, comprising the following steps: step 1, battery is placed in container with slurry；Step 2, the container for filling slurry is placed on vibratory equipment and is vibrated；Step 3, after vibrated, fineness test is carried out respectively to upper slurry and lower slurry, according to the fineness ratio of upper and lower level slurry evaluate slurry dispersion stabilization, when upper and lower level slurry fineness ratio be higher than 0.9, illustrate that slurry dispersion stabilization is more excellent；When the fineness ratio of upper and lower level slurry is between 0.7-0.9, illustrate that the dispersion stabilization of slurry is good, when the fineness ratio of upper and lower level slurry is lower than 0.7, illustrates that the dispersion stabilization of slurry is poor.Used time of the invention is short, at low cost；Vibration does not generate damage to slurry.
Description
Technical field
The invention belongs to field of batteries, and in particular to a method of detection battery slurry dispersion stabilization.
Background technique
Lithium ion battery due to having many advantages, such as clean and environmental protection, energy density height, discharging voltage balance, good cycle,
Have become the main energy sources of communication electronic product.In recent years, the new energy that lithium ion battery is considered most promising is dynamic
One of power form, the scientist of various countries are constantly dedicated to the more practical and effective lithium ion battery of developmental research.Slurry is to determine
An important factor for determining performance of lithium ion battery, the bad meeting of slurry dispersion stabilization is so that battery consistency is poor, and reversible capacity is small, very
To being likely to result in security risk, thus in production process test evaluation slurry stability to performance of lithium ion battery to closing weight
It wants.
There are many method of evaluation Stability of Slurry at present, and the method that patent CN102539294A is proposed is by slurry in liquid separation
It is stood in funnel, tests upper and lower level slurry particles size difference in separatory funnel later and evaluate Stability of Slurry, this method
It is time-consuming longer.Patent CN101382489A is evaluated by the back scattering strength difference of testing size upper and lower level slurry after centrifugation
Stability of Slurry, although this method is quick, slurry needs to be centrifuged, and then uses laser light scattering instrument and carries out back scattering intensity
Measurement, process is relatively complicated, and centrifugation can cause the damage of irrecoverability to slurry.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of side for detecting battery slurry dispersion stabilization
Method, low cost, used time are short, lossless to slurry.
The present invention is to be achieved through the following technical solutions:
A method of detection battery slurry dispersion stabilization, comprising the following steps:
Step 1, battery is placed in container with slurry；
Step 2, the container for filling slurry is placed on vibratory equipment and is vibrated；
Step 3, after vibrated, fineness test is carried out respectively to upper slurry and lower slurry, according to upper and lower level slurry
Fineness ratio evaluates slurry dispersion stabilization.
Preferably, in step 1, battery is lithium ion battery slurry with slurry, and the height of container is more than or equal to 5cm, body
Product is more than or equal to 5mL.
Preferably, in step 2, vibratory equipment is tap density meter or plain bumper.
Preferably, in step 2, the mode of vibration is to vibrate up and down, and vibration height is less than or equal to 50cm, and vibration frequency is
60-600 times/min, time of vibration 1-720min.
Preferably, in step 3, liquid-transfering gun, pipette, syringe or suction pipe is used to draw slurry to carry out fineness test.
Preferably, in step 3, it is extremely slurry total height 1/ away from slurry upper level that upper slurry, which is from slurry upper surface,
Slurry at 3 in range, lower slurry are from container bottom to being at slurry total height 1/3 in range away from container bottom height
Slurry.
Preferably, in step 3, fineness test is carried out using Hegman grind gage.
Preferably, in step 3, using parallel test method more than three times when fineness is tested, each parallel testing draws phase
Consistent with the slurry and slurry therewith amount of height and position, test value takes the average value of replicate test result more than three times.
Preferably, fineness test slurry therewith volume is 0.2-2mL.
Preferably, in step 3, evaluating slurry dispersion stabilization according to the fineness ratio of upper and lower level slurry is specifically: when upper and lower
The fineness ratio of layer slurry is higher than 0.9, illustrates that slurry dispersion stabilization is more excellent；When upper and lower level slurry fineness ratio 0.7-0.9 it
Between, illustrate that the dispersion stabilization of slurry is good, when upper and lower level slurry fineness ratio be lower than 0.7, illustrate the dispersion stabilization of slurry
It is poor.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention measures the fineness of upper and lower level slurry, according to upper and lower using the method treatment of battery slurry of vibration after vibration
The fineness ratio of layer slurry evaluates Stability of Slurry, the slurries dispersion stabilization detection method such as is centrifuged or stands for a long time with using
It compares, the used time is short, at low cost.Importantly, slurry, after vibration, the difference of upper and lower level solid content reduces, this shows
The upper and lower level solid content of slurry is more uniform after passing through vibration, therefore this vibration generates damage to slurry, instead
Improve its homogeneity.The methods of traditional centrifugation and long-time standing testing size dispersion stabilization will lead to the heavy of slurry
Drop, to cause irreversible damage to slurry, in comparison, this method has a clear superiority.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
The method of detection battery slurry dispersion stabilization of the present invention, comprising the following steps:
(1) battery prepared in right amount is taken to be placed in the container with certain altitude and volume with slurry；
(2) container for filling slurry is placed on the vibratory equipments such as tap density meter or plain bumper, is vibrated with certain frequency
For a period of time；
(3) take it is vibrated after container the upper and lower slurry carry out fineness test, when the fineness ratio of upper and lower level slurry is high
In 0.9, illustrate that slurry dispersion stabilization is more excellent；When the fineness ratio of upper and lower level slurry is between 0.7-0.9, illustrate the dispersion of slurry
Have good stability, when upper and lower level slurry fineness ratio be lower than 0.7, illustrate that the dispersion stabilization of slurry is poor.
Battery described in step (1) is lithium ion battery slurry with slurry, and lithium ion battery is anode sizing agent with slurry
Or negative electrode slurry, the height of the container are not less than 5cm, volume is not less than 5mL.
The mode of vibration of vibratory equipment described in step (2) is to vibrate up and down, and vibration height is no more than 50cm, is preferably vibrated
Height is 1-5cm, and vibration frequency is 60-600 times/min, time of vibration 1-720min.
The measurement of container upper and lower level slurry described in step (3) can be used liquid-transfering gun, pipette, syringe or suction pipe etc. into
Row, when slurry in measuring container, upper slurry is derived from slurry upper surface to being slurry total height 1/3 away from slurry upper level
Locate the slurry in range, lower slurry is derived from container bottom extremely away from container bottom height in range at slurry total height 1/3
Slurry.
The fineness test is is tested using Hegman grind gage, using parallel testing side more than three times when fineness is tested
Method, testing slurry therewith volume every time is 0.2-2mL.When fineness is tested, test value is the flat of replicate test result more than three times
Mean value, three times parallel testing draw identical height and position slurry and slurry therewith amount it is consistent.
Specific embodiment is as follows.
Embodiment 1
It is 96:2:1.5:0.5 according to mass ratio, weighs nickle cobalt lithium manganate, PVDF, SP, CNT, NMP is solvent, and design is solid
Content is 68%, requires to use stirred tank slurrying according to technique, the anode sizing agent after taking 50mL to close slurry is fitted into 50mL graduated cylinder, so
The graduated cylinder equipped with anode sizing agent is placed in tap density meter afterwards, 30min is vibrated with 300 beats/min of frequency, vibration height is
5cm, is drawn with suction pipe away from the slurry 0.5mL at pulp surface 1cm, measures fineness with Hegman grind gage, is repeated to draw and be measured
Operation, measurement is averaged three times altogether；Then the slurry 0.5mL at the 1cm of graduated cylinder bottom is drawn with suction pipe, uses Hegman fineness grind
Meter measurement fineness, repeats to draw and measurement operation, and METHOD FOR CONTINUOUS DETERMINATION averages three times, calculates the thin of upper slurry and lower slurry
Degree ratio.The solid content of the solid content of slurry at measuring distance pulp surface 1cm and the slurry at the 1cm of graduated cylinder bottom is surveyed
Amount is averaged three times.
Embodiment 2
It is 95:3:1.5:0.5 according to mass ratio, weighs nickle cobalt lithium manganate, PVDF, SP, CNT, NMP is solvent, and design is solid
Content is 68%, requires to use stirred tank slurrying according to technique, the anode sizing agent after taking 50mL to close slurry is fitted into 50mL graduated cylinder, so
The graduated cylinder equipped with anode sizing agent is placed in tap density meter afterwards, 30min is vibrated with 300 beats/min of frequency, vibration height is
1cm, is drawn with liquid-transfering gun away from the slurry 0.2mL at pulp surface 5cm, measures fineness with Hegman grind gage, is repeated to draw and be surveyed
Amount operation, measurement is averaged three times altogether；Then the slurry 0.2mL at the 5cm of graduated cylinder bottom is drawn with suction pipe, it is thin with scraper plate
Degree meter measurement fineness, repeats to draw and measurement operation, and METHOD FOR CONTINUOUS DETERMINATION averages three times, calculates upper slurry and lower slurry
Fineness ratio.The solid content of the solid content of slurry at measuring distance pulp surface 1cm and the slurry at the 1cm of graduated cylinder bottom,
Measurement is averaged three times.
Embodiment 3
It is 97:1:1.5:0.5 according to mass ratio, weighs nickle cobalt lithium manganate, PVDF, SP, CNT, NMP is solvent, and design is solid
Content is 68%, requires to use stirred tank slurrying according to technique, the anode sizing agent after taking 50mL to close slurry is fitted into 50mL graduated cylinder, so
The graduated cylinder equipped with anode sizing agent is placed in tap density meter afterwards, 30min is vibrated with 300 beats/min of frequency, vibration height is
5cm, is drawn with pipette away from the slurry 0.8mL at pulp surface 8cm, measures fineness with Hegman grind gage, is repeated to draw and be surveyed
Amount operation, measurement is averaged three times altogether；Then the slurry 0.8mL at the 8cm of graduated cylinder bottom is drawn with suction pipe, it is thin with scraper plate
Degree meter measurement fineness, repeats to draw and measurement operation, and measurement is averaged three times altogether, calculates the thin of upper slurry and lower slurry
Degree ratio.The solid content of the solid content of slurry at measuring distance pulp surface 1cm and the slurry at the 1cm of graduated cylinder bottom is surveyed
Amount is averaged three times.
Embodiment 4
It is 95.8:1.4:1.8:1 according to mass ratio, weighs graphite cathode, CMC, SBR, SP, deionized water is solvent, if
Counting solid content is 45%, requires to use stirred tank slurrying according to technique, the negative electrode slurry after taking 50mL to close slurry is packed into 50mL graduated cylinder
In, then the graduated cylinder equipped with negative electrode slurry is placed in tap density meter, 30min is vibrated with 300 beats/min of frequency, vibration is high
Degree is 5cm, is drawn with syringe away from slurry 1mL pulp surface 10cm at, measures fineness with Hegman grind gage, repeat to draw with
Measurement operation, measurement is averaged three times altogether, is then drawn the slurry 1mL at the 10cm of graduated cylinder bottom with suction pipe, is used scraper plate
Fineness gauge measures fineness, repeats to draw and measurement operation, and measurement is averaged three times altogether, calculates upper slurry and lower slurry
Fineness ratio.The solid content of the solid content of slurry at measuring distance pulp surface 1cm and the slurry at the 1cm of graduated cylinder bottom,
Measurement is averaged three times.
Embodiment 5
It is 94.5:2:2.5:1 according to mass ratio, weighs graphite cathode, CMC, SBR, SP, deionized water is solvent, design
Solid content is 45%, requires to use stirred tank slurrying according to technique, and the negative electrode slurry after taking 50mL to close slurry is fitted into 50mL graduated cylinder,
Then the graduated cylinder equipped with negative electrode slurry is placed in tap density meter and 30min, vibration height is vibrated with 300 beats/min of frequency
For 10cm, drawn with suction pipe away from slurry 1.5mL pulp surface 14cm at, measure fineness with Hegman grind gage, repeat to draw with
Measurement operation, measurement is averaged three times altogether, then draws slurry 1.5mL at the 14cm of graduated cylinder bottom with suction pipe, with scraping
Plate fineness gauge measures fineness, repeats to draw and measurement operates, measurement is averaged three times altogether, calculates upper slurry and lower slurry
Fineness ratio.The solid content of slurry at measuring distance pulp surface 1cm and the consolidating for slurry at the 1cm of graduated cylinder bottom contain
Amount, measurement are averaged three times.
Embodiment 6
It is 97:1:1:1 according to mass ratio, weighs graphite cathode, CMC, SBR, SP, deionized water is solvent, and design contains admittedly
Amount is 45%, requires to use stirred tank slurrying according to technique, the negative electrode slurry after taking 50mL to close slurry is fitted into 50mL graduated cylinder, then
Graduated cylinder equipped with negative electrode slurry is placed in tap density meter, 30min is vibrated with 300 beats/min of frequency, vibration height is
20cm, is drawn with suction pipe away from the slurry 2mL at pulp surface 12cm, measures fineness with Hegman grind gage, is repeated to draw and be measured
Operation, measurement is averaged three times altogether, is then drawn the slurry 2mL at the 12cm of graduated cylinder bottom with suction pipe, is used Hegman fineness grind
Meter measurement fineness repeats to draw and measure operation, and measurement is averaged three times altogether, calculates the fineness of upper slurry and lower slurry
Than.The solid content of the solid content of slurry at measuring distance pulp surface 1cm and the slurry at the 1cm of graduated cylinder bottom, measurement
It averages three times.
Embodiment 7
It is 96:2:1.5:0.5 according to mass ratio, weighs nickle cobalt lithium manganate, PVDF, SP, CNT, NMP is solvent, and design is solid
Content is 68%, requires to use stirred tank slurrying according to technique, and the anode sizing agent after taking 100mL to close slurry is fitted into 100mL beaker,
Then the beaker equipped with anode sizing agent is placed in tap density meter and 1min is vibrated with 600 beats/min of frequency, vibration height is
50cm, is drawn with suction pipe away from the slurry 0.5mL at pulp surface 20cm, measures fineness with Hegman grind gage, is repeated to draw and be surveyed
Amount operation, measurement is averaged three times altogether, is then drawn the slurry 0.5mL at beaker bottom 20cm with suction pipe, is used scraper plate
Fineness gauge measures fineness, repeats to draw and measurement operation, and measurement is averaged three times altogether, calculates upper slurry and lower slurry
Fineness ratio.The solid content of slurry at measuring distance pulp surface 1cm and the solid content of the slurry at beaker bottom 1cm,
Measurement is averaged three times.
Embodiment 8
It is 95.8:1.4:1.8:1 according to mass ratio, weighs graphite cathode, CMC, SBR, SP, deionized water is solvent, if
Counting solid content is 45%, requires to use stirred tank slurrying according to technique, the negative electrode slurry after taking 25mL to close slurry is packed into 25mL graduated cylinder
In, then the graduated cylinder equipped with negative electrode slurry is placed on plain bumper, 720min is vibrated with 60 beats/min of frequency, vibration height is
5cm, is drawn with suction pipe away from the slurry 0.5mL at pulp surface 5cm, measures fineness with Hegman grind gage, is repeated to draw and be measured
Operation, measurement is averaged three times altogether, is then drawn the slurry 0.5mL at the 5cm of graduated cylinder bottom with suction pipe, is used Hegman fineness grind
Meter measurement fineness repeats to draw and measure operation, and measurement is averaged three times altogether, calculates the fineness of upper slurry and lower slurry
Than.The solid content of the solid content of slurry at measuring distance pulp surface 1cm and the slurry at the 1cm of graduated cylinder bottom, measurement
It averages three times.
Embodiment 9
It is 95.8:1.4:1.8:1 according to mass ratio, weighs graphite cathode, CMC, SBR, SP, deionized water is solvent, if
Counting solid content is 45%, requires to use stirred tank slurrying according to technique, and the negative electrode slurry after taking 5mL to close slurry is fitted into 5mL graduated cylinder,
Then the graduated cylinder equipped with negative electrode slurry is placed on plain bumper and 500min is vibrated with 100 beats/min of frequency, vibration height is
3cm, is drawn with suction pipe away from the slurry 0.2mL at pulp surface 1cm, measures fineness with Hegman grind gage, is repeated to draw and be measured
Operation, measurement is averaged three times altogether, is then drawn the slurry 0.2mL at the 1cm of graduated cylinder bottom with suction pipe, is used Hegman fineness grind
Meter measurement fineness repeats to draw and measure operation, and measurement is averaged three times altogether, calculates the fineness of upper slurry and lower slurry
Than.The solid content of the solid content of slurry at measuring distance pulp surface 1cm and the slurry at the 1cm of graduated cylinder bottom, measurement
It averages three times.
Table 1 is the slurry in embodiment 1-6 after vibration, the fineness value and fineness ratio of upper and lower layer slurry.Embodiment 1-
3 be anode sizing agent, and the slurry dispersibility of embodiment 1-3 is respectively good, more excellent and poor as can be seen from the table.From reality
PVDF binder known to applying in the narration of a 1-3 accounts for the mass percent of total dosage from high to low successively are as follows: 2 > of embodiment is implemented
1 > embodiment 3 of example has direct relation with the dispersed quality of slurry.Similarly, it can be seen that embodiment 4-6's by data in table
Slurry dispersibility is respectively good, more excellent and poor, has directly with the usage amount of dispersing agent C MC and binder SBR in embodiment 4-6
Connect relationship.Although dispersing agent and adhesive using it is more when facilitate the dispersion of slurry, using will lead to pole piece too much
Resistivity increases, to reduce the performance and energy density of battery.Thus suitable binder and dispersant dosage should protected
It holds as low as possible while slurry favorable dispersibility.This method helps quickly to filter out suitable binder and dispersing agent is used
Amount, while also contributing to quickly screening and optimizing pulping process.
Table 2 is that the slurry vibration in embodiment 1-6 is forward and backward, the solid content value of upper and lower layer slurry.From the data in the table,
After vibration, the difference of upper and lower layer solid content reduces slurry, this shows the upper and lower layer solid content of slurry by vibrating
It is more uniform later.The methods of traditional centrifugation and long-time standing testing size dispersion stabilization will lead to the sedimentation of slurry,
To cause irreversible damage to slurry, in comparison, this method has a clear superiority.
Slurry in 1 embodiment 1-6 of table is after vibration, the fineness value and fineness ratio of upper and lower layer slurry
Slurry vibration in 2 embodiment 1-6 of table is forward and backward, the solid content value of upper and lower layer slurry
Claims (10)
1. a kind of method for detecting battery slurry dispersion stabilization, which comprises the following steps:
Step 1, battery is placed in container with slurry；
Step 2, the container for filling slurry is placed on vibratory equipment and is vibrated；
Step 3, after vibrated, fineness test is carried out respectively to upper slurry and lower slurry, according to the fineness of upper and lower level slurry
Than evaluating slurry dispersion stabilization.
2. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 1, electricity
Pond is lithium ion battery slurry with slurry, and the height of container is more than or equal to 5cm, and volume is more than or equal to 5mL.
3. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 2, vibration
Dynamic equipment is tap density meter or plain bumper.
4. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 2, vibration
Dynamic mode is to vibrate up and down, and vibration height is less than or equal to 50cm, and vibration frequency is 60-600 times/min, time of vibration 1-
720min。
5. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 3, adopt
Slurry is drawn with liquid-transfering gun, pipette, syringe or suction pipe to carry out fineness test.
6. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 3, on
Layer slurry is from slurry upper surface extremely away from the slurry that slurry upper level is at slurry total height 1/3 in range, lower slurry
For from container bottom to being slurry at slurry total height 1/3 in range away from container bottom height.
7. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 3, carefully
Degree test is carried out using Hegman grind gage.
8. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 3, carefully
Using parallel test method, each parallel testing draw the slurry and slurry therewith of identical height and position more than three times when degree test
Amount is consistent, and test value takes the average value of replicate test result more than three times.
9. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that fineness tests institute
It is 0.2-2mL with slurry volume.
10. the method for detection battery slurry dispersion stabilization according to claim 1, which is characterized in that in step 3,
According to the fineness ratio of upper and lower level slurry evaluate slurry dispersion stabilization be specifically: when upper and lower level slurry fineness ratio be higher than 0.9, say
Bright slurry dispersion stabilization is more excellent；When the fineness ratio of upper and lower level slurry is between 0.7-0.9, illustrate that the dispersion stabilization of slurry is good
It is good, when the fineness ratio of upper and lower level slurry is lower than 0.7, illustrate that the dispersion stabilization of slurry is poor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752293A (en) * | 2019-01-24 | 2019-05-14 | 合肥国轩高科动力能源有限公司 | A kind of device detecting pulp of lithium ion battery stability |
| CN111624136A (en) * | 2020-06-18 | 2020-09-04 | 合肥国轩高科动力能源有限公司 | Method for detecting stability and viscosity of battery slurry |
| CN114235902A (en) * | 2021-11-15 | 2022-03-25 | 湖北亿纬动力有限公司 | Method for testing dispersion stability of carbon black |
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