CN102636412A - Method for detecting leveling property of battery slurry - Google Patents
Method for detecting leveling property of battery slurry Download PDFInfo
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- CN102636412A CN102636412A CN201210035187XA CN201210035187A CN102636412A CN 102636412 A CN102636412 A CN 102636412A CN 201210035187X A CN201210035187X A CN 201210035187XA CN 201210035187 A CN201210035187 A CN 201210035187A CN 102636412 A CN102636412 A CN 102636412A
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Abstract
The invention provides a method for detecting leveling property of battery slurry, which is used for measuring the flowing distance of the battery slurry with the set volume in a set inclined path and at set time, and then measuring the leveling property of the battery slurry according to the flowing distance. The method detects the leveling property of the battery slurry by the aid of the flowing property of the battery slurry. During detection, only the flowing distance of the quantitative slurry in the set inclined path and at the set time needs to be measured, if the flowing distance is longer, the leveling property is better, and the density of a polar plate surface prepared by the slurry is more uniform. The method is simple and convenient in operation and visual and accurate in results. Technicians in the field can determine upper and lower limit values of the flowing distance of a system of the standard slurry in advance, and when the slurry is blended, testing is performed according to the method until the flowing distance of the prepared slurry meets needs within a specified range.
Description
Technical field
The present invention relates to battery and make field, particularly a kind of detection method of cell size levelability.
Background technology
In recent years, along with the exhaustion of traditional petrochemical industry resource, and the oil price that causes thus a series of problems such as skyrocket, people increase the increasing demand of novel clean energy resource.The lithium ion ion battery is a kind of novel power supply, and it has the energy density height, have extended cycle life and advantage such as pollution-free, and be the highest a kind of portable chemical energy of present specific energy.Lithium ion battery development since coming out has been widely used in the equipment such as notebook computer, video camera, mobile communications tool and camera rapidly at present.
Though lithium ion battery has above-mentioned advantage, but its high rate performance has much room for improvement, and this also is to limit one of its reason of using at vehicles power source.In order to optimize the high rate performance of battery, need make the current density of battery even, reduce polarization thus, reduce thermal value.
In the lithium ion battery, active material is overlying on collection liquid surfaces such as aluminium foil or Copper Foil, and collector is through contacting the electronics that electrochemical reaction is produced and compile and export to external circuit with the physics of active material, thereby realizes that chemical energy is converted into the process of electric energy.Can know by inference thus, active material has important material impact in the distribution situation of collection liquid surface to the current density of lithium battery.
The slurry that normally will contain active material in the existing lithium battery manufacturing process is coated on the collector; In order to make battery current density even; Need active substance can be uniformly distributed in collection liquid surface, discharge and recharge lithium ion can evenly be disperseed at inside battery.And, just need slurry to have the levelability of setting in order to reach the homogeneity that active substance applies.
The painting process index of core is the CPK value the most in electrokinetic cell production, and it is meant the processing procedure Capability index, and this value is high more to mean that the yield rate of this operation and consistance are high more.When the preparation electrode slurry, just should regulate slurry makes slurry that best levelability arranged; To promote the CPK value of painting process; This just requires the levelability of method ability test slurry, in order to the flow leveling of quantitative test slurry, and can be according to the CPK value of this number adjustment product.
For the levelability of electrode slurry, prior art mainly is to investigate from the rheological curve of slurry, judges the quality of levelability according to the size of setting viscosity change in the range of shear rate.Adopt this method to investigate the levelability of slurry, not enough simple, intuitive, and complex operation are not suitable for using in the large-scale production.Another kind method is exactly to adopt the detection method of coating flow, with the flow of sagging appearance testing size, and then the levelability of judgement slurry.But consider that consolidating of electrode slurry self contains with viscosity and coating very big difference is arranged, slurry is that height contains admittedly, full-bodied a kind of non-Newtonian fluid, so the method for sagging appearance can not obviously detect the flow performance of aspect of slurry accurately, and error is bigger.
Summary of the invention
The technical matters that the present invention solves is to provide a kind of easy and simple to handle, and visual result is electrode slurry levelability detection method accurately.
In view of this, the present invention provides a kind of detection method of electrode slurry levelability, comprising:
Measure the distance of flow of electrode slurry under setting slant path and setting-up time of setting volume, according to the levelability of distance of flow detecting electrode slurry.
Preferably, specifically may further comprise the steps:
The electrode slurry of setting volume is placed in the container, write down the initial position of said electrode slurry;
Said container is tilted according to set path, pick up counting the final position that the recording electrode slurry arrives after tilting to finish in setting-up time;
Calculate the distance of flow of slurry according to said initial position and final position, according to the levelability of distance of flow detecting electrode slurry.
Preferably, said container is that transparent column describes device.
Preferably, said transparent column describes that device is provided with base, and said base diameter is greater than the tube diameter.
Preferably, said transparent column describes that the device sidewall is provided with mark line.
Preferably, said transparent column describes that the device sidewall also is provided with scale mark, and said scale mark is starting point with the mark line, extends to the vessel port direction.
Preferably, this method is specially:
Said transparent column is described that device places horizontal stand, electrode slurry is poured in the said container to electrode slurry reached the mark line position;
Said container to inclined to vessel port contact with water platform, is picked up counting then the maximum scale line mark number that the recording electrode slurry reaches in setting-up time;
Levelability according to said maximum scale line mark number detecting electrode slurry.
Preferably, said container is also comprised after inclined to vessel port contact with water platform: the step that said container is fixing.
Preferably, said transparent column is described that device places horizontal stand also to comprise the step of cleaning, drying container before.
The present invention provides a kind of detection method of electrode slurry levelability, and it is to measure the distance of flow of electrode slurry under setting slant path and setting-up time of setting volume, according to the levelability of distance of flow detecting electrode slurry.This method is to utilize the flowing property of slurry self to detect flow leveling.During test, only need to measure quantitative slurry and get final product in the distance of flow of setting under slant path and the setting-up time.Easy and simple to handle, visual result.Experiment showed, that the testing result accuracy is high.When measuring the slurry levelability; Those skilled in the art can adopt the standard slurry to confirm the upper lower limit value of this kind slurry system distance of flow earlier; When homogenate, only need test according to the method described above, in specialized range, represent to meet demand until the distance of flow of the slurry of preparing.
Description of drawings
Fig. 1 is the structural representation of the container of the present invention's employing.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The embodiment of the invention discloses a kind of detection method of electrode slurry levelability, its method is: measure and set the distance of flow of long-pending electrode slurry in setting slant path and setting-up time, according to the levelability of distance of flow detecting electrode slurry.
The present invention comes the flow leveling of test slurry through the fluid ability of investigating slurry.In the above-mentioned detection method; Slurry volume, approach and time all are the fixed amounts of presetting; Having only slurry is variable; The present invention is used to just guarantee that to the setting of slurry volume, slant path and time the flox condition of different slurries is consistent in advance, and it is specifically measured or mode those skilled in the art can select and adjust according to factors such as test conditions.
During test, measure the distance of flow of different slurries according to the method described above, distance of flow explains that more far flow leveling is good more, and is even more by the pole piece surface density of this pulp preparation.Those skilled in the art can be according to the requirement of surface density homogeneity bound, and correspondence goes out the bound of corresponding slurry levelability, i.e. the bound of distance of flow.Afterwards, during for system homogenate of the same race, only need test according to the method described above, explain that until the distance of flow of the slurry of preparing its levelability meets demand in specialized range.
Said method preferably carries out according to following mode:
The electrode slurry of setting volume is placed in the container, write down the initial position of said electrode slurry;
Said container is tilted according to the setting approach, pick up counting the final position that the recording electrode slurry reaches after tilting to finish in setting-up time;
Calculate the distance of flow of slurry according to said initial position and final position, according to the levelability of distance of flow detecting electrode slurry.
The shape of the container that said method uses can be test tube shaped, bowl-type etc.For the ease of observation, and material is flowed evenly in flow process, the present invention preferably adopts transparent columniform container.Further, for the straight tube that makes container can form bigger angle with surface level when tilting,, make the levelability of different slurries more significantly characterize out by distance of flow so that bigger expulsive force is provided for slurry flows.This transparent column of selecting for use describes that device preferably is provided with base, and base diameter is greater than the tube diameter.
In order to guarantee the consistance of slurry flox condition not of the same race, need the volume of the different testing sizes of control to equate.For the ease of the volume of control testing size, the present invention also preferably is provided with mark line at the sidewall of oolemma base hydrostatic column, during test, in said vesse, pour into slurry so far mark line just stop charging, and then be convenient to control to different slurry consumptions.Simultaneously, this mark line also can be used for the initial position that the mark slurry drops into.Further, for the ease of calculating the distance of flow of slurry, the present invention also preferably is provided with scale mark on the said vesse sidewall, and this scale mark is starting point with the mark line, extends to the vessel port direction.Thus, when calculating the slurry distance of flow, only need read the pairing graduated scale number of slurry distal-most end and get final product.
In sum, the present invention most preferably adopts container as shown in Figure 1, and this container is a transparent vessel, and material is a glass, and it comprises: vertical tube part 1 and be arranged at the base 2 of vertical tube part 1 bottom; Vertical tube part 1 sidewall is established mark line 101 and scale mark 102, and scale mark 102 is a starting point with the mark line, extends to the vessel port direction.
The method that the employing said vesse carries out the detection of slurry levelability is following:
Above-mentioned transparent column is described that device places horizontal stand, electrode slurry is poured in the said container to electrode slurry reached the mark line position;
Said container to inclined to vessel port contact with water platform, is picked up counting then the maximum scale line mark number that the recording electrode slurry reaches in setting-up time;
Levelability according to maximum scale line mark number detecting electrode slurry.
In addition, the present invention also preferably with container to the laggard fixing step of hydrostatic column of being about to of inclined to vessel port contact with water platform, roll to prevent container, influence test result.
The clean-up performance of said vesse is to test result also influence to some extent, and for this reason, the present invention is also preferably describing said transparent column device places horizontal stand to carry out the step of cleaning, drying container before.
Can know that by foregoing the present invention utilizes the flowing property of slurry self to detect flow leveling.During test, only need to measure quantitative slurry and get final product in the distance of flow of setting under slant path and the setting-up time.Easy and simple to handle, visual result.When measuring the slurry levelability; Those skilled in the art can adopt the standard slurry to confirm the upper lower limit value of this kind slurry system distance of flow earlier; When homogenate, only need test according to the method described above, in specialized range, represent to meet demand until the distance of flow of the slurry of preparing.
In order further to understand the present invention, below in conjunction with embodiment the detection method of electrode slurry levelability provided by the invention to be described, protection scope of the present invention is not limited by the following examples.
The mensuration environment of following examples is following:
Air humidity (35 ± 5) %RH
Temperature (20 ± 5) ℃
The container that uses is above-mentioned transparent column shape as shown in Figure 1 band base container.
Embodiment 1
Get two kinds with the system slurry, numbering is respectively slurry A and slurry B, tests according to following mode respectively:
1, the container after will cleaning in advance and dry is positioned on the horizontal stand.Get slurry to be measured and in solution, topple over electrode slurry; Operator's eyes are equal with the mark line of container bottom; Guarantee that the slurry plane is just equal with mark line; Toppling over needs in the slurry process to guarantee slurry is not stained with on the sidewall of Container Tag line with the upper part, otherwise need be with repeating above-mentioned steps behind the container cleaning, drying.
2, container is tilted until vessel port contact with water plane slowly, container position is fixed, pick up counting simultaneously, the setting time of repose is 1min.
3, behind the 1min with container weather, be positioned over stably on the surface level, read the scale mark mark number that slurry is left to the farthest.The result is following:
Slurry A distance of flow 25cm
Slurry B distance of flow 21cm.
Use slurry A and slurry B on coating machine, to be coated with respectively; Obtain being coated with the pole piece sheet, test the surface density of two pole piece different parts, and calculate extreme difference according to the surface density result who obtains; The more for a short time pole piece surface density that shows of extreme difference is even more, and the counter levelability of releasing slurry is good more.The computing method of extreme difference are: the mean value of the difference of the value of test data and data mean value.Surface density and extreme difference test result are listed in table 1:
Table 1 surface density and extreme difference test result
Can be known that by The above results the slurry distance of flow that adopts said method to measure is far away more, coating back pole piece surface density is more little, and this explanation slurry levelability is good more, and this method is easy and simple to handle, visual result and comparatively accurate.
The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (9)
1. the detection method of an electrode slurry levelability is characterized in that, comprising:
Measure the distance of flow of electrode slurry under setting slant path and setting-up time of setting volume, according to the levelability of distance of flow detecting electrode slurry.
2. detection method according to claim 1 is characterized in that, specifically may further comprise the steps:
The electrode slurry of setting volume is placed in the container, write down the initial position of said electrode slurry;
Said container is tilted according to set path, pick up counting the final position that the recording electrode slurry arrives after tilting to finish in setting-up time;
Calculate the distance of flow of slurry according to said initial position and final position, according to the levelability of distance of flow detecting electrode slurry.
3. detection method according to claim 2 is characterized in that, said container is that transparent column describes device.
4. detection method according to claim 3 is characterized in that, said transparent column describes that device is provided with base, and said base diameter is greater than the tube diameter.
5. detection method according to claim 4 is characterized in that, said transparent column describes that the device sidewall is provided with mark line.
6. detection method according to claim 5 is characterized in that, said transparent column describes that the device sidewall also is provided with scale mark, and said scale mark is starting point with the mark line, extends to the vessel port direction.
7. detection method according to claim 6 is characterized in that, this method is specially:
Said transparent column is described that device places horizontal stand, electrode slurry is poured in the said container to electrode slurry reached the mark line position;
Said container to inclined to vessel port contact with water platform, is picked up counting then the maximum scale line mark number that the recording electrode slurry reaches in setting-up time;
Levelability according to said maximum scale line mark number detecting electrode slurry.
8. detection method according to claim 7 is characterized in that, said container is also comprised after inclined to vessel port contact with water platform: the step that said container is fixing.
9. detection method according to claim 7 is characterized in that, said transparent column is described that device places horizontal stand also to comprise the step of cleaning, drying container before.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210035187.XA CN102636412B (en) | 2012-02-16 | 2012-02-16 | Method for detecting leveling property of battery slurry |
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| CN201210035187.XA CN102636412B (en) | 2012-02-16 | 2012-02-16 | Method for detecting leveling property of battery slurry |
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| CN102636412A true CN102636412A (en) | 2012-08-15 |
| CN102636412B CN102636412B (en) | 2014-04-09 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103604724A (en) * | 2013-11-19 | 2014-02-26 | 河南海格尔高温材料有限公司 | Experimental method for detecting bonded slag resistance of refractory material |
| CN105388088A (en) * | 2015-12-11 | 2016-03-09 | 湖南科技大学 | Test apparatus for characterizing condensation characteristic of foam fluid by loss flow time, and method thereof |
| CN108956378A (en) * | 2018-06-05 | 2018-12-07 | 东莞塔菲尔新能源科技有限公司 | A kind of test device and its test method of slurry fluidity |
| CN109781584A (en) * | 2019-03-15 | 2019-05-21 | 宁波石墨烯创新中心有限公司 | Levelability detection method and levelability detection device |
| CN110057719A (en) * | 2018-01-18 | 2019-07-26 | 立邦涂料（中国）有限公司 | Detection and application of the fixed point platform in aqueous high molecular material application property |
| CN111413251A (en) * | 2019-01-08 | 2020-07-14 | 上海深竹化工科技有限公司 | Leveling property testing method of leveling agent for coating |
| CN112595630A (en) * | 2020-11-23 | 2021-04-02 | 上海航天化工应用研究所 | Solid propellant slurry leveling property testing device and method |
| CN113555521A (en) * | 2021-07-06 | 2021-10-26 | 江苏天鹏电源有限公司 | Method for rapidly detecting processing performance of lithium ion battery negative electrode slurry |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604724A (en) * | 2013-11-19 | 2014-02-26 | 河南海格尔高温材料有限公司 | Experimental method for detecting bonded slag resistance of refractory material |
| CN103604724B (en) * | 2013-11-19 | 2015-10-28 | 河南海格尔高温材料有限公司 | A kind of experimental technique detecting the anti-stick slag of fire resistive material |
| CN105388088A (en) * | 2015-12-11 | 2016-03-09 | 湖南科技大学 | Test apparatus for characterizing condensation characteristic of foam fluid by loss flow time, and method thereof |
| CN105388088B (en) * | 2015-12-11 | 2017-09-15 | 湖南科技大学 | To lose the test device and method that flowing time characterizes aerated fluid congealing property |
| CN110057719A (en) * | 2018-01-18 | 2019-07-26 | 立邦涂料（中国）有限公司 | Detection and application of the fixed point platform in aqueous high molecular material application property |
| CN110057719B (en) * | 2018-01-18 | 2022-02-11 | 立邦涂料（中国）有限公司 | Detection and application of fixed point platform in workability of water-based high polymer material |
| CN108956378A (en) * | 2018-06-05 | 2018-12-07 | 东莞塔菲尔新能源科技有限公司 | A kind of test device and its test method of slurry fluidity |
| CN108956378B (en) * | 2018-06-05 | 2023-09-26 | 江苏正力新能电池技术有限公司 | Slurry fluidity testing device and testing method thereof |
| CN111413251A (en) * | 2019-01-08 | 2020-07-14 | 上海深竹化工科技有限公司 | Leveling property testing method of leveling agent for coating |
| CN109781584A (en) * | 2019-03-15 | 2019-05-21 | 宁波石墨烯创新中心有限公司 | Levelability detection method and levelability detection device |
| CN112595630A (en) * | 2020-11-23 | 2021-04-02 | 上海航天化工应用研究所 | Solid propellant slurry leveling property testing device and method |
| CN113555521A (en) * | 2021-07-06 | 2021-10-26 | 江苏天鹏电源有限公司 | Method for rapidly detecting processing performance of lithium ion battery negative electrode slurry |
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| CN102636412B (en) | 2014-04-09 |
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