CN117092069A - Method for detecting floating of binder in lithium ion battery slurry - Google Patents
Method for detecting floating of binder in lithium ion battery slurry Download PDFInfo
- Publication number
- CN117092069A CN117092069A CN202311366369.XA CN202311366369A CN117092069A CN 117092069 A CN117092069 A CN 117092069A CN 202311366369 A CN202311366369 A CN 202311366369A CN 117092069 A CN117092069 A CN 117092069A
- Authority
- CN
- China
- Prior art keywords
- slurry
- sample
- slurry sample
- binder
- floating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000011230 binding agent Substances 0.000 title claims abstract description 45
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 40
- 239000000853 adhesive Substances 0.000 claims abstract description 37
- 230000001070 adhesive effect Effects 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 17
- 230000008859 change Effects 0.000 claims abstract description 11
- 239000011267 electrode slurry Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000000265 homogenisation Methods 0.000 abstract description 5
- 239000006258 conductive agent Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The application relates to a method for detecting the floating of a binder in lithium ion battery slurry, which comprises the steps of placing a slurry sample into a sample measuring container of a multiple light scattering instrument; detecting a slurry sample by using a multiple light scattering instrument to obtain a transmitted light reference spectrogram with a set time interval in a set time period, and then obtaining a histogram of the change of the transmitted light intensity of a target detection position of the slurry sample along with time according to the transmitted light reference spectrogram, so as to obtain a transmitted light intensity difference value of the target detection position of the slurry sample in the set time period, wherein if the difference value is zero, the adhesive does not float, otherwise, the adhesive floats; the transmission light intensities of the positive and negative electrode slurry samples at different heights detected by the multiple light scattering instrument are utilized to represent more accurate floating data of the adhesive, and the adhesive is not influenced by factors such as similar component elements of the samples; directly testing slurry in the homogenization stage, and manufacturing the slurry into a pole piece is not needed, so that hysteresis is avoided in the test; the test process is nondestructive, the sample is not damaged, and experimental errors are avoided.
Description
Technical Field
The application relates to the technical field of lithium ion battery preparation, in particular to a method for detecting the floating of a binder in lithium ion battery slurry.
Background
In the preparation process of the lithium ion battery, the homogenization refers to the process of mixing materials such as active substances, binders, conductive agents, solvents and the like in a homogenizing and dispersing device so as to obtain lithium ion battery mixed slurry. Coating refers to the process of uniformly coating slurry prepared by homogenate on a current collector and drying in an oven to prepare the pole piece.
In the coating and drying process, the binder floats upwards along with the evaporation of the solvent, so that the binder gathers at the top of the pole piece, the stripping strength of the pole piece is reduced, and the electrochemical performance of a finished battery product is further affected. Therefore, in the manufacturing process of the lithium ion battery, the effective evaluation of the floating of the binder in the slurry is of great significance to the quality of the finished lithium battery.
The traditional evaluation method generally detects the distribution condition of the adhesive of the finished pole piece after coating, and further indirectly characterizes the floating condition of the adhesive in the slurry, but has the following defects:
1. the sizing agent is already made into pole pieces, and hysteresis exists in the test, so that the production efficiency is affected.
2. The lithium ion battery pole piece, in particular to the negative pole piece, the element components among the components are very similar, and the traditional element quantitative detection method is difficult to accurately measure.
3. If other substances are used for calibrating the adhesive, the original structure of the polar plate can be damaged.
Disclosure of Invention
The embodiment of the application provides a method for detecting the floating of a binder in lithium ion battery slurry, which aims to solve the problems that hysteresis exists in a mode of detecting the distribution condition of the binder in a coated pole piece finished product in the related art and the production efficiency is affected.
In a first aspect, a method for detecting floating of a binder in a lithium ion battery slurry is provided, which includes the following steps:
placing the slurry sample into a sample measuring container of a multiple light scattering instrument;
detecting the slurry sample by using a multiple light scattering instrument to obtain a transmitted light reference spectrogram of a set time interval in a set period of the slurry sample;
obtaining a bar chart of the change of the transmitted light intensity of the target detection position of the slurry sample along with time within a set period according to the transmitted light reference spectrogram;
according to the bar graph, obtaining a transmitted light intensity extreme value of the target detection position of the slurry sample within a set period, and judging whether the adhesive in the slurry sample floats or not according to the following rule:
if the limit value is zero, the adhesive in the slurry sample does not float, otherwise, the adhesive in the slurry sample floats.
In some embodiments, the target detection location comprises a location on the bottom, middle, or top of the sample vessel corresponding to a location on the slurry sample therein.
In some embodiments, when the determination result is that the adhesive in the slurry sample floats up, the method further includes the following steps:
comparing the limit value with a set threshold range;
if the minimum value is smaller than the minimum value of the set threshold range, the binder in the slurry sample is indicated to float slightly;
if the limit value falls into a set threshold range, the binder in the slurry sample is indicated to float upwards moderately;
and if the limit value is larger than the maximum value of the set threshold value range, indicating that the adhesive in the slurry sample is seriously floated.
In some embodiments, when the determination result is that the adhesive in the slurry sample floats up, the method further includes the following steps:
comparing the limit value with a plurality of set threshold values; wherein each set threshold value is unequal and corresponds to an upward floating degree respectively;
if the limit value is equal to one of the set threshold values, indicating that the floating degree of the binder in the slurry sample is the floating degree corresponding to the set threshold value;
and if the extremely poor value is positioned between two adjacent set thresholds, indicating that the floating degree of the adhesive in the slurry sample is positioned between the floating degrees corresponding to the two corresponding set thresholds.
In some embodiments, according to the above-mentioned transmitted light reference spectrum, a histogram of the transmitted light intensity of the target detection position of the slurry sample in a set period of time is obtained, which includes the following steps:
and taking different moments in a set period as an abscissa and taking a transmitted light intensity value of the slurry sample target detection position as an ordinate to form the histogram.
In some embodiments, obtaining the transmitted light intensity difference value of the target detection position of the slurry sample within the set period of time includes the following steps:
obtaining the maximum value and the minimum value of the ordinate in a bar graph of the change of the transmitted light intensity of the slurry sample target detection position along with time within a set period;
subtracting the minimum value from the maximum value to obtain the limit value.
In some embodiments, the slurry sample is taken from a process of preparing a battery slurry.
In some embodiments, the slurry sample comprises a positive electrode slurry sample or a negative electrode slurry sample.
In some embodiments, a containing space is arranged inside the sample testing container, and a transparent sealing cover is detachably connected to the top of the sample testing container.
In some embodiments, the slurry sample is detected using a multiple light scattering instrument at a set temperature, the set temperature being 20-90 ℃.
The technical scheme provided by the application has the beneficial effects that:
the embodiment of the application provides a method for detecting the floating of a binder in lithium ion battery slurry, which comprises the steps of obtaining a slurry sample for detection in the process of preparing the battery slurry; the slurry sample comprises a positive electrode slurry sample or a negative electrode slurry sample; detecting the slurry sample by using a multiple light scattering instrument to obtain a transmitted light reference spectrogram of a set time interval in a set period of the slurry sample; according to the transmitted light reference spectrogram, a histogram of the transmitted light intensity of the target detection position of the slurry sample in a set period of time is obtained, so that a transmitted light intensity difference value of the target detection position of the slurry sample in the set period of time is obtained, and whether the binder in the slurry sample floats upwards is judged according to the following rule; if the difference value is zero, the adhesive in the slurry sample does not float, otherwise, the adhesive in the slurry sample floats. The method comprises the steps that the multiple light scattering instruments are used for detecting the change of the transmitted light intensity of a target detection position of a slurry sample within a set period, the extremely poor value of the transmitted light intensity at the top of the slurry within the set period is used for representing the floating degree of the adhesive in the slurry sample, the influence of factors such as the element approximation of the components of the sample is avoided, and the result is more accurate; directly testing the slurry in the homogenization stage, and manufacturing the slurry into a pole piece is not needed, so that hysteresis is avoided in the test; the test process is lossless, the sample is not destroyed, and experimental errors are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for detecting the floating of a binder in a lithium ion battery slurry according to an embodiment of the present application;
FIG. 2 is a graph of a transmitted light reference spectrum of a slurry sample 1 provided in an embodiment of the present application, wherein no adhesive lifting occurs;
FIG. 3 is a graph of a transmitted light reference spectrum of a slurry sample 2 with adhesive lifting provided in an embodiment of the present application;
fig. 4 is a bar graph showing the transmitted light intensity at the top of the slurry sample 2 over time for a set period of time provided by an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a method for detecting the floating of a binder in lithium ion battery slurry, which aims to solve the problems that hysteresis exists in a mode of detecting the distribution condition of the binder in a coated pole piece finished product in the related art and the production efficiency is affected.
Referring to fig. 1, a detection method for evaluating the floating of a binder in a slurry of a lithium ion battery includes the following steps:
step S01, placing a slurry sample into a sample measuring container of a multiple light scattering instrument for detection; the sample measuring container is a transparent container;
step S02, detecting the slurry sample by using a multiple light scattering instrument to obtain a transmitted light reference spectrogram of a set time interval in a set period of the slurry sample;
step S03, obtaining a histogram of the change of the transmitted light intensity of the target detection position of the slurry sample along with time within a set period of time according to the transmitted light reference spectrogram;
step S04, obtaining a transmitted light intensity difference value of a target detection position of a slurry sample within a set period according to the bar graph;
further, according to the above-mentioned extremely difference value, judge whether the binder in the slurry sample floats up according to the following rule:
if the difference value is zero, the adhesive in the slurry sample does not float, otherwise, the adhesive in the slurry sample floats.
The method comprises the steps that the multiple light scattering instruments are used for detecting the change of the transmitted light intensity of a target detection position of a slurry sample in a set period of time, the extremely poor value of the transmitted light intensity at the top of the slurry in the set period of time is used for representing the floating degree of the adhesive in the slurry sample, the influence of factors such as the close elements of the components of the sample is avoided, and the result is more accurate; directly testing the slurry in the homogenization stage, and manufacturing the slurry into a pole piece is not needed, so that hysteresis is avoided in the test; the test process is lossless, the sample is not destroyed, and experimental errors are avoided.
According to actual needs, after judging that the adhesive in the slurry sample floats upwards, the degree of floating is still needed to be judged, and the degree of floating is convenient to quantify, so the following settings are provided:
first, when the judgment result is that the adhesive floats up, the method further comprises the following steps:
comparing the extreme value with a set threshold range;
if the difference value is smaller than the minimum value of the set threshold range, the binder in the slurry sample is indicated to float slightly;
if the limit value falls into the set threshold value range, the binder in the slurry sample is indicated to float upwards moderately;
if the difference value is larger than the maximum value of the set threshold range, the adhesive in the slurry sample is indicated to float up seriously. Wherein, the larger the difference value is, the more serious the floating is.
Second, when the judgment result is that the adhesive floats up, the method further comprises the following steps:
comparing the difference value with a plurality of set thresholds; wherein each set threshold value is unequal and corresponds to an upward floating degree respectively;
if the limit value is equal to one of the set threshold values, indicating that the floating degree of the binder in the slurry sample is the floating degree corresponding to the set threshold value;
if the polar difference is between the two adjacent set thresholds, the adhesive floating degree in the slurry sample is indicated to be between the floating degrees corresponding to the two corresponding set thresholds.
The two judging modes are to judge the floating degree by different reference standards, and different judging modes can be selected according to actual needs.
The method comprises the following steps of: scanning the top of the slurry sample in the sample measuring container from bottom to top once every set time within a set period; in the one-time scanning process, forming a transmitted light reference spectrogram by taking the height of a slurry sample as an abscissa and the transmitted light intensity of the slurry sample as an ordinate; the device automatically scans, and repeats the above steps to complete multiple scans.
According to the reference spectrogram of the transmitted light, obtaining a bar graph of the change of the transmitted light intensity of a target detection position of the slurry sample along with time within a set period, wherein the bar graph comprises the following steps: the different times within the set period are taken as abscissa and the transmitted light intensity value of the slurry sample target detection position is taken as ordinate to form a bar chart, as shown in fig. 4.
According to the bar graph, obtaining a transmitted light intensity difference value of a target detection position of a slurry sample within a set period of time, wherein the method comprises the following steps: obtaining the maximum value and the minimum value of the ordinate in a bar graph of the change of the transmitted light intensity of the slurry sample target detection position along with time within a set period; the maximum value is subtracted from the minimum value to obtain an extreme value.
Wherein, the inside of survey appearance container is equipped with accommodation space to the top detachable is connected with transparent sealed lid.
Wherein, the slurry sample can be obtained in the process of preparing the battery slurry.
The slurry sample may be a positive electrode slurry sample or a negative electrode slurry sample. The target detection location includes a location on the bottom, middle, or top of the sample vessel that corresponds to a location on the slurry sample within the sample vessel. The bottom, the middle and the top of the target detection position can be detected by utilizing multiple light scattering instrument detection in principle so as to represent the floating of the adhesive according to the result; however, when the detection is performed at the bottom or the middle position, due to the influence that graphite, a conductive agent and a binder are finally settled after a certain time, impurity removal is needed as a result of the later detection when the detection is performed at the position, noise is reduced for detected data, certain inconvenience exists in impurity removal, and the workload is increased; therefore, based on the considerations of improving the detection efficiency, reducing the workload and convenience, the most preferred modes are generally: the top of the sample container is used as the target detection position. Of course, the application does not exclude the technical solution of detecting the bottom and the middle.
For example, the following description will be made with the example in which the target detection position is the top of the sample container:
the slurry sample may include graphite, a first binder, a second binder, a conductive agent, and a solvent, wherein the first binder is sodium carboxymethylcellulose CMC-Na, the second binder is styrene-butadiene rubber SBR, the conductive agent is conductive carbon black SP, the solvent is deionized water DIW, and the components except DIW are opaque.
Due to the differences of the component ratios, pulping process and the like, the sedimentation of graphite, conductive agent and binder in the slurry sample 1 shown in fig. 2 can be caused; at the bottom of slurry sample 1, the transmitted light intensity decays over time as particles settle and the opposite is true at the top.
Or, the binder in the slurry sample 2 shown in fig. 3 floats upwards, and graphite and the conductive agent are settled; the adhesive floats up along with the evaporation of the solvent, and the sealing cover enables the sample measuring container to be in a closed state, so that the evaporation of the solvent stops after the steam is saturated, and the adhesive floats up, so that the transmitted light intensity at the bottom of the slurry sample 2 is firstly enhanced and then weakened along with the time, and the top is opposite.
Further, the slurry sample is detected by a multiple light scattering instrument at a set temperature, and the set temperature is 20-90 ℃. Alternatively, the temperature is set at 25 ℃. The temperature range corresponds to the temperature range of actual production, and the accuracy of the test result can be ensured. It will be appreciated that temperature will have an effect on the test and that the data tested at the same temperature will be of comparative significance. However, the range of 20 to 90 ℃ is not specific to the specific conditions set forth for the test, but only indicates that the detection method used in this example can be performed within this temperature range.
The application has the principle and beneficial effects that:
the working principle of the multiple light scattering instrument is as follows: the light source irradiates the scanned sample from bottom to top, a part of light passes through the transparent part of the sample, and the light intensity of the part is measured by the instrument, namely the transmitted light intensity. The instrument scans the sample at intervals of a set time within a set period, a curve with the height of the sample as an abscissa and the transmission light reference of the sample as an ordinate (the transmission light reference is the ratio of the transmission light intensity measured each time to the transmission light intensity measured for the first time) is prepared once every scanning, and finally all the measured curves are combined into a transmission light reference spectrogram. Taking fig. 2 and 3 as an example, the instrument scans the sample once every 0.5 hour within 72 hours, namely 145 times of scanning, to obtain 145 curves, and finally, the 145 curves are assembled into the transmitted light reference spectrograms of fig. 2 and 3.
The extremely poor value of the transmitted light intensity at the top of the slurry in a set period is used for representing the floating degree of the binder in the slurry sample, the influence of factors such as the element similarity of the components of the sample is avoided, and the result is more accurate; directly testing the slurry in the homogenization stage, and manufacturing the slurry into a pole piece is not needed, so that hysteresis is avoided in the test; the test process is lossless, the sample is not destroyed, and experimental errors are avoided.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The method for detecting the floating of the binder in the lithium ion battery slurry is characterized by comprising the following steps of:
placing the slurry sample into a sample measuring container of a multiple light scattering instrument;
detecting the slurry sample by using a multiple light scattering instrument to obtain a transmitted light reference spectrogram of a set time interval in a set period of the slurry sample;
obtaining a bar chart of the change of the transmitted light intensity of the target detection position of the slurry sample along with time within a set period according to the transmitted light reference spectrogram;
according to the bar graph, obtaining a transmitted light intensity extreme value of the target detection position of the slurry sample within a set period, and judging whether the adhesive in the slurry sample floats or not according to the following rule:
if the limit value is zero, the adhesive in the slurry sample does not float, otherwise, the adhesive in the slurry sample floats.
2. The method for detecting the floating of the binder in the lithium ion battery slurry according to claim 1, wherein the method comprises the following steps:
the target detection location includes a location on the bottom, middle, or top of the sample vessel corresponding to the location on the slurry sample therein.
3. The method for detecting the floating of the binder in the lithium ion battery slurry according to claim 1, wherein the method comprises the following steps:
when the judgment result is that the adhesive in the slurry sample floats up, the method further comprises the following steps:
comparing the limit value with a set threshold range;
if the minimum value is smaller than the minimum value of the set threshold range, the binder in the slurry sample is indicated to float slightly;
if the limit value falls into a set threshold range, the binder in the slurry sample is indicated to float upwards moderately;
and if the limit value is larger than the maximum value of the set threshold value range, indicating that the adhesive in the slurry sample is seriously floated.
4. The method for detecting the floating of the binder in the lithium ion battery slurry according to claim 1, wherein the method comprises the following steps:
when the judgment result is that the adhesive in the slurry sample floats up, the method further comprises the following steps:
comparing the limit value with a plurality of set threshold values; wherein each set threshold value is unequal and corresponds to an upward floating degree respectively;
if the limit value is equal to one of the set threshold values, indicating that the floating degree of the binder in the slurry sample is the floating degree corresponding to the set threshold value;
and if the extremely poor value is positioned between two adjacent set thresholds, indicating that the floating degree of the adhesive in the slurry sample is positioned between the floating degrees corresponding to the two corresponding set thresholds.
5. The method for detecting the floating of the binder in the slurry of the lithium ion battery according to claim 1, wherein a bar graph of the change of the transmitted light intensity of the target detection position of the slurry sample with time in a set period is obtained according to the transmitted light reference spectrogram, comprising the following steps:
and taking different moments in a set period as an abscissa and taking a transmitted light intensity value of the slurry sample target detection position as an ordinate to form the histogram.
6. The method for detecting the floating of the binder in the slurry of the lithium ion battery according to claim 5, wherein the step of obtaining the transmitted light intensity difference value of the target detection position of the slurry sample within a set period of time comprises the following steps:
obtaining the maximum value and the minimum value of the ordinate in a bar graph of the change of the transmitted light intensity of the slurry sample target detection position along with time within a set period;
subtracting the minimum value from the maximum value to obtain the limit value.
7. The method for detecting the floating of the binder in the lithium ion battery slurry according to claim 1, wherein the method comprises the following steps: the slurry sample was taken from the procedure of preparing the battery slurry.
8. The method for detecting the floating of the binder in the lithium ion battery slurry according to claim 7, wherein the method comprises the following steps: the slurry samples include a positive electrode slurry sample or a negative electrode slurry sample.
9. The method for detecting the floating of the binder in the lithium ion battery slurry according to claim 1, wherein the method comprises the following steps: the inside of the sample testing container is provided with a containing space, and the top of the sample testing container is detachably connected with a transparent sealing cover.
10. The method for detecting the floating of the binder in the lithium ion battery slurry according to claim 1, wherein the method comprises the following steps:
and detecting the slurry sample by using a multiple light scattering instrument at a set temperature, wherein the set temperature is 20-90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311366369.XA CN117092069B (en) | 2023-10-20 | 2023-10-20 | Method for detecting floating of binder in lithium ion battery slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311366369.XA CN117092069B (en) | 2023-10-20 | 2023-10-20 | Method for detecting floating of binder in lithium ion battery slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117092069A true CN117092069A (en) | 2023-11-21 |
| CN117092069B CN117092069B (en) | 2024-03-15 |
Family
ID=88775754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311366369.XA Active CN117092069B (en) | 2023-10-20 | 2023-10-20 | Method for detecting floating of binder in lithium ion battery slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117092069B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382489A (en) * | 2007-09-07 | 2009-03-11 | 比亚迪股份有限公司 | Method for evaluating stability of slurry |
| JP2010277821A (en) * | 2009-05-28 | 2010-12-09 | Toyota Motor Corp | Inspection method of electrode slurry |
| JP2017168343A (en) * | 2016-03-17 | 2017-09-21 | Ｎｅｃエナジーデバイス株式会社 | Method for evaluating electrode slurry for lithium ion battery, method for manufacturing electrode slurry for lithium ion battery, and method for manufacturing electrode for lithium ion battery |
| CN107271386A (en) * | 2017-06-12 | 2017-10-20 | 常州第六元素材料科技股份有限公司 | A kind of method for setting up graphene Stability of Slurry characterization model |
| CN108152161A (en) * | 2017-12-13 | 2018-06-12 | 桑顿新能源科技有限公司 | A kind of evaluation method of pulp of lithium ion battery stability |
| CN111077105A (en) * | 2019-12-31 | 2020-04-28 | 银隆新能源股份有限公司 | Method for detecting uniformity of colloidal solution and application |
| CN111537443A (en) * | 2020-05-07 | 2020-08-14 | 惠州亿纬锂能股份有限公司 | Method for testing stability of battery slurry and battery |
| KR20220135531A (en) * | 2021-03-30 | 2022-10-07 | 주식회사 엘지에너지솔루션 | Metrhod for evaluating dissoultion quality of binder solution for secondary battery electrode and producing method of electrode slurry for secondary battery by the evaluation method |
| CN115501809A (en) * | 2022-09-16 | 2022-12-23 | 松山湖材料实验室 | Evaluation method for uniformity of lithium ion battery slurry and preparation method of lithium ion battery slurry |
| CN116581295A (en) * | 2023-05-30 | 2023-08-11 | 江苏耀宁新能源创新科技有限公司 | Positive electrode slurry, preparation method thereof and stability evaluation method |
| CN116660087A (en) * | 2023-05-15 | 2023-08-29 | 瑞浦兰钧能源股份有限公司 | Method for testing stability of battery slurry |
-
2023
- 2023-10-20 CN CN202311366369.XA patent/CN117092069B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382489A (en) * | 2007-09-07 | 2009-03-11 | 比亚迪股份有限公司 | Method for evaluating stability of slurry |
| JP2010277821A (en) * | 2009-05-28 | 2010-12-09 | Toyota Motor Corp | Inspection method of electrode slurry |
| JP2017168343A (en) * | 2016-03-17 | 2017-09-21 | Ｎｅｃエナジーデバイス株式会社 | Method for evaluating electrode slurry for lithium ion battery, method for manufacturing electrode slurry for lithium ion battery, and method for manufacturing electrode for lithium ion battery |
| CN107271386A (en) * | 2017-06-12 | 2017-10-20 | 常州第六元素材料科技股份有限公司 | A kind of method for setting up graphene Stability of Slurry characterization model |
| CN108152161A (en) * | 2017-12-13 | 2018-06-12 | 桑顿新能源科技有限公司 | A kind of evaluation method of pulp of lithium ion battery stability |
| CN111077105A (en) * | 2019-12-31 | 2020-04-28 | 银隆新能源股份有限公司 | Method for detecting uniformity of colloidal solution and application |
| CN111537443A (en) * | 2020-05-07 | 2020-08-14 | 惠州亿纬锂能股份有限公司 | Method for testing stability of battery slurry and battery |
| KR20220135531A (en) * | 2021-03-30 | 2022-10-07 | 주식회사 엘지에너지솔루션 | Metrhod for evaluating dissoultion quality of binder solution for secondary battery electrode and producing method of electrode slurry for secondary battery by the evaluation method |
| CN115501809A (en) * | 2022-09-16 | 2022-12-23 | 松山湖材料实验室 | Evaluation method for uniformity of lithium ion battery slurry and preparation method of lithium ion battery slurry |
| CN116660087A (en) * | 2023-05-15 | 2023-08-29 | 瑞浦兰钧能源股份有限公司 | Method for testing stability of battery slurry |
| CN116581295A (en) * | 2023-05-30 | 2023-08-11 | 江苏耀宁新能源创新科技有限公司 | Positive electrode slurry, preparation method thereof and stability evaluation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117092069B (en) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108535659B (en) | Detection method for cycle microcosmic lithium analysis of lithium ion battery | |
| CN107703202B (en) | Permanganate index on-line monitoring automatic titration determination method and device | |
| Gossage et al. | Probing the reversibility and kinetics of Li+ during SEI formation and (de) intercalation on edge plane graphite using ion-sensitive scanning electrochemical microscopy | |
| CN117092069B (en) | Method for detecting floating of binder in lithium ion battery slurry | |
| CN111650089A (en) | Method for evaluating dynamic stability of battery slurry | |
| CN111551523A (en) | Method for rapidly evaluating dispersion performance of positive and negative electrode slurry of battery | |
| CN114136878A (en) | Method for testing corrosion resistance of fuel cell metal bipolar plate coating | |
| CN114200322A (en) | Lithium ion battery lithium separation detection method | |
| CN112432969A (en) | Composite insulator aging degree improvement detection method based on modulation photothermal radiation | |
| CN110887889B (en) | Analysis method for rapid detection of heavy metals in water body | |
| CN111537400B (en) | Method for online determination of fractal dimension of particulate matter in water | |
| CN111537443A (en) | Method for testing stability of battery slurry and battery | |
| CN109856066B (en) | Method for evaluating gram capacity of nickel-containing material and application thereof | |
| CN113899796A (en) | High-sensitivity detection of Pb2+Ratiometric electrochemical sensors and their use | |
| CN112305052A (en) | Measuring device and method for measuring hydrogen evolution characteristics of lead storage battery negative electrode material | |
| KR102650095B1 (en) | Method and apparatus for detecting defects of rechargeable battery | |
| CN220488277U (en) | Sealing device and detection equipment | |
| CN111982761B (en) | Method for detecting dispersibility of titanium dioxide in water-based color paste | |
| CN218445258U (en) | PH meter for measuring pH value of solution | |
| CN118010818A (en) | Silicon-oxygen-doped lithium battery negative electrode slurry uniformity detection method | |
| CN108872552B (en) | Silicon rubber hydrophobicity judging method based on initial hydrophobic angle and surface energy tests | |
| CN113125381B (en) | Detection method and comparison method for evaluating covering power of wet coating film and special pressing plate device thereof | |
| CN117388121A (en) | Method for detecting dispersion state of lithium battery slurry based on multiple light scattering technology | |
| CN109655507B (en) | Electrochemical detection kit for detecting cardiac troponin I and preparation method thereof | |
| CN116754440A (en) | Method and device for evaluating wettability of electrolyte on battery pole piece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |