CN113740195A - Powder wettability evaluation method and application thereof - Google Patents
Powder wettability evaluation method and application thereof Download PDFInfo
- Publication number
- CN113740195A CN113740195A CN202110886849.3A CN202110886849A CN113740195A CN 113740195 A CN113740195 A CN 113740195A CN 202110886849 A CN202110886849 A CN 202110886849A CN 113740195 A CN113740195 A CN 113740195A
- Authority
- CN
- China
- Prior art keywords
- solid sample
- wettability
- powder
- evaluating
- battery
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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
A powder wettability evaluation method and application thereof are provided, the evaluation method comprises the following steps: s100: mixing the powder to be detected with a binder and pressing the mixture into a solid sample; s200: testing the wettability of the solid sample pressed in the step S100; s300: and evaluating the wettability of the powder according to the wettability of the solid sample measured in the step S200. The method for evaluating the wettability of the powder can directly evaluate the wettability of the powder such as the battery positive electrode active material powder, the battery negative electrode active material powder or the conductive agent powder for the battery pole piece, does not need to be manufactured into an electrode pole piece, and has the advantages of high efficiency, low cost and more accurate evaluation result.
Description
Technical Field
The present application relates to, but not limited to, the field of battery technologies, and in particular, to a method for evaluating wettability of powder and use thereof.
Background
The increasing consumption of fossil energy on earth and the environmental problem caused thereby are that mankind knocks the police bell of energy application, on one hand must develop and utilize renewable energy, reduce the dependence on single fossil energy, on the other hand must control and innocent treatment the harmful substance that fossil energy consumption produced. The battery is used as an excellent energy storage device, and is widely applied to the fields of spaceflight, energy storage power supplies, electric vehicles and the like due to the advantages of high energy density, long service life and the like.
The battery is a key component of the electric automobile and is the heart of the electric automobile. The performance of the battery pole piece used in the battery has important influence on the performances of the electric automobile, such as endurance capacity, safety and the like.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the present application.
The application provides a powder wettability evaluation method and application thereof, the wettability evaluation method can quickly and accurately evaluate the wettability of battery positive electrode active substance powder, battery negative electrode active substance powder or conductive agent powder for a battery pole piece, and is simple to operate and low in cost.
The application provides a powder wettability evaluation method, which comprises the following steps:
s100: mixing the powder to be detected with a binder and pressing the mixture into a solid sample;
s200: testing the wettability of the solid sample pressed in the step S100;
s300: and evaluating the wettability of the powder according to the wettability of the solid sample measured in the step S200.
In an embodiment of the application, the powder to be detected may be a battery positive electrode active material powder, a battery negative electrode active material powder, or a conductive agent powder for a battery pole piece.
In an embodiment of the present application, the binder may be a binder for a battery.
In the embodiment of the present application, the binder may be selected from any one or more of polyvinylidene fluoride, styrene butadiene rubber/sodium carboxymethyl cellulose, and polytetrafluoroethylene.
In an embodiment of the present application, a weight ratio of the powder to be detected to the binder may be 9:1 to 99: 1.
In embodiments of the present application, the solid sample may have a compacted density of 1.2g/cm3To 4.0g/cm3。
In embodiments of the present application, the temperature at which the solid sample is pressed may be 15 ℃ to 80 ℃.
In embodiments of the present application, the solid sample may be a cylinder, a cuboid, or a triangular prism.
In an embodiment of the present application, step S200 may include:
s201: immersing a portion of the solid sample in a solution, allowing the solid sample to absorb the solution, and detecting data on the change in weight of the solid sample over time during absorption of the solution by the solid sample; the cross-sections of the portions of the solid samples immersed in the solution are the same in shape in the immersion depth direction;
s202: and drawing a curve of the weight of the solid sample changing along with the time according to the data of the weight of the solid sample changing along with the time obtained by detection, and calculating the infiltration rate of the solid sample.
In the examples of the present application, the infiltration rate of the solid sample can be calculated by the following formula:
wherein V is the infiltration rate of the solid sample, and the unit is g/(mm)2×s)；
m 1-weight of solid sample in g after the test started to plateau;
m 2-weight of solid sample after a test period in g;
s-immersion of the solid sample in solutionCross-sectional area in mm2；
T1-time after the test began to plateau in units of s;
t2-time after a test period, in units of s;
k-the slope of the curve of the change in weight of the solid sample with time in the test stability period.
The application also provides the application of the powder wettability evaluation method in controlling the wettability of the battery pole piece.
In embodiments of the present application, the use may comprise: the infiltration rate of the solid sample is 0.0002 g/(mm)2Xs) to 0.02 g/(mm)2Xs) in the range of the battery positive electrode active material powder, the battery negative electrode active material powder or the conductive agent powder for the battery pole piece.
The method for evaluating the wettability of the powder can directly evaluate the wettability of the powder such as the battery positive electrode active material powder, the battery negative electrode active material powder or the conductive agent powder for the battery pole piece, does not need to prepare the battery positive electrode active material powder, the battery negative electrode active material powder or the conductive agent powder for the battery pole piece into the electrode pole piece, and has the advantages of high efficiency, low cost and more accurate evaluation result; in addition, the wettability of the electrode plate can be estimated according to the wettability evaluation result of the powder before the electrode plate is prepared, and the battery positive electrode active substance powder, the battery negative electrode active substance powder or the conductive agent powder for the battery plate, which is favorable for improving the wettability of the electrode plate, can be screened out, so that a reference basis is provided for controlling the wettability of the battery plate.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a schematic structural diagram of an wettability detection apparatus used in an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating capillary phenomenon during a process of testing wettability of a solid sample according to an embodiment of the present application;
FIG. 3 is a graph showing the change in weight of a solid sample obtained in the examples of the present application with time.
The reference symbols in the drawings have the following meanings:
1-a windshield; 2-a connector; 3-solid sample; 4-a liquid container; 5-solution; 6-a lifting platform; 7-a weighing device; 8-a sample-carrying member; 9-solid sample infiltration section; 10-shock absorbers; 11-a data transmission line; 12-computer.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Positive and negative electrode materials, conductive agents, and the like used in the battery are indispensable components of the battery. At present, people usually manufacture positive and negative electrode materials, conductive agents and the like into battery pole pieces, and then test various performances of the battery pole pieces to see whether the requirements of people are met. However, people pay little attention to the performances of the positive and negative electrode materials and the conductive agent, so the performances of the positive and negative electrode materials and the conductive agent cannot be directly tested generally.
The inventors of the present application believe that wettability of materials such as positive and negative electrode materials and conductive agents directly affects wettability of battery electrode sheets, and further affects performance of batteries, such as endurance and safety. However, at present, people pay little attention to the performances of positive and negative electrode materials and conductive agents, and no relevant report for directly testing the wettability of the positive and negative electrode materials and the conductive agents is found. On the other hand, the wettability of the battery pole piece is an auxiliary parameter for evaluating the performance of the battery pole piece, so that the wettability of the battery pole piece is often tested when other performances of the battery pole piece are tested, and the wettability of a positive electrode material, a negative electrode material and the wettability of a conductive agent can be reversely deduced through the wettability of the battery pole piece. However, this method is not only slow but also costly.
The embodiment of the application provides a method for evaluating wettability of powder, which comprises the following steps:
s100: mixing the powder to be detected with a binder and pressing the mixture into a solid sample;
s200: testing the wettability of the solid sample pressed in the step S100;
s300: and evaluating the wettability of the powder according to the wettability of the solid sample measured in the step S200.
In the examples of the present application, the shape of the cross section of the solid sample in the length direction is the same.
In an embodiment of the application, the powder to be detected may be a battery positive electrode active material powder, a battery negative electrode active material powder, or a conductive agent powder for a battery pole piece.
In an embodiment of the present application, the binder may be a binder for a battery.
In embodiments of the present application, the binder may be selected from any one or more of polyvinylidene fluoride (PVDF), styrene butadiene rubber/sodium carboxymethylcellulose (SBR/CMC), Polytetrafluoroethylene (PTFE).
In the embodiment of the present application, in step S100, the powder to be detected and the binder may be mixed according to a ratio in the battery pole piece, for example, a weight ratio of the powder to be detected and the binder may be 9:1 to 99:1, and for example, may be 9:1, 20:1, 30:1, 40:1, 50:1, 60:1, 70:1, 80:1, 90:1, and 99: 1.
In embodiments of the present application, the solid sample may be compressed according to the compacted density of the battery pole piece such that the compacted density of the solid sample is about the same as the compacted density of the battery pole piece, e.g., the compacted density of the solid sample may be 1.2g/cm3To 4.0g/cm3Further, for example, it may be 1.2g/cm3、2.0g/cm3、2.5g/cm3、3.0g/cm3、3.5g/cm3Or 4.0g/cm3。
In the examples of the present application, the temperature at which the solid sample is pressed may be 15 ℃ to 80 ℃, for example, may be 15 ℃, 25 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃ or 80 ℃.
In embodiments of the present application, the solid sample may be a column and have the same cross-sectional shape from one end of the column to the other.
In embodiments of the present application, the solid sample may be a cylinder, a cuboid, or a triangular prism.
In embodiments of the present application, the solid sample is a cylinder, which may have a diameter of 6mm to 8 mm.
In an embodiment of the present application, step S200 may include:
s201: immersing a portion of the solid sample in a solution, allowing the solid sample to absorb the solution, and detecting data on the change in weight of the solid sample over time during absorption of the solution by the solid sample; the cross-sections of the portions of the solid samples immersed in the solution are the same in shape in the immersion depth direction;
s202: and drawing a curve of the weight of the solid sample changing along with the time according to the data of the weight of the solid sample changing along with the time obtained by detection, and calculating the infiltration rate of the solid sample.
In the examples of the present application, the infiltration rate of the solid sample can be calculated by the following formula:
wherein V is the infiltration rate of the solid sample, and the unit is g/(mm)2×s)；
m 1-weight of solid sample in g after the test started to plateau;
m 2-weight of solid sample after a test period in g;
s-the cross-sectional area of the part of the solid sample immersed in the solution, in mm2；
T1-time after the test began to plateau in units of s;
t2-time after a test period, in units of s;
k-the slope of the curve of the change in weight of the solid sample with time in the test stability period.
In the embodiment of the present application, the testing temperature of step S200 may be a constant temperature (i.e., the upper and lower temperature do not fluctuate more than ± 3 ℃) test at a fixed temperature in the range of 15 ℃ to 30 ℃.
In the embodiment of the present application, in order to obtain the cross-sectional area of the portion of the solid sample immersed in the solution, a portion of the solid sample having a regular cross-sectional shape (for example, a cross-section of a circle, a square, or a triangle) may be immersed in the solution.
In the embodiment of the present application, the step S200 may be performed by using a wettability detecting apparatus as shown in fig. 1. As shown in fig. 1, the wettability detecting apparatus includes: a liquid container 4, a weighing device 7, a sample carrier 8, and a connector 2 connecting the weighing device 7 and the sample carrier 8.
The liquid container 4 is arranged to contain a solution 5; the weighing device 7 is arranged above the liquid container 4 and is arranged to weigh the liquid container 4; the sample loading part 8 is used for loading the solid sample 3 to be detected and enabling the solid sample 3 to be soaked in the solution 5; the connector 2 is a non-elastic connecting piece, can be an iron wire, and can fix the solid sample 3 to be detected and connect the weighing device 7 and the sample loading part 8.
The wettability detection device can further comprise a data acquisition device, the data acquisition device is set to acquire and record the data of the weight of the liquid container 4 along with the change of time, and the data acquisition device is connected with the weighing device 7 through a data transmission line 11 and is provided with a computer 12 provided with a wettability test system. The weight measured by the weighing device 7 is transmitted to a computer 12 through a data transmission line 11, and is subjected to data processing through an wettability testing system, so that a change curve of the weight along with time can be obtained.
The wettability testing device may further include a windshield 1, the windshield 1 may be disposed outside the liquid container 4 and the weighing device 7, and the liquid container 4 and the weighing device 7 may be covered therein to prevent an influence of an external airflow on a test result. The weighing device 7 can be fixed to the windshield 1.
The wettability detection device may further include a lifting table 6, where the lifting table 6 is disposed below the liquid container 4, and configured to bear the liquid container 4 and adjust (including fine-tuning) the height of the liquid container 4. The lifting platform 6 can be an electric or manual lifting platform.
The wettability detection device can further comprise a shock absorber 10, wherein the shock absorber 9 is arranged at the bottom of the lifting platform 6, and is helpful for preventing the lifting platform 6 from vibrating to influence the test effect.
In an embodiment of the present application, the method for evaluating wettability of powder may include:
(1) uniformly mixing the powder to be detected and a binder according to a certain proportion (the powder can be mixed according to the proportion of homogenate of a battery), drying and grinding;
(2) pressing the mixture of the ground powder to be detected and the binder into a solid sample (which can be a cylinder, a cuboid or a triangular prism) with a regular shape by using a mold, wherein the compaction density of the solid sample can be the same as that of the battery pole piece; taking out the pressed solid sample 3 for standby;
(3) fixing the solid sample 3 on the connector 2 so that the bottom surface of the solid sample 3 contacts the bottom of the liquid container 4;
(4) injecting the solution 5 into the liquid container 4, placing on the lifting platform 6, and quickly adjusting the height of the lifting platform 6 to control the depth of the solid sample 3 immersed in the solution 5, wherein the depth can be 1/10-2/5 of the height of the solid sample 3;
(5) closing the windshield 1 door;
(6) zeroing the weighing device 7;
(7) starting a data acquisition device and a computer 12 to start to acquire the change data of the weight of the liquid container 4 along with the time;
(8) stopping the data acquisition device after testing for a certain time;
(9) drawing a change curve (shown in figure 3) of the weight of the solid sample 3 with time according to the change data of the weight of the liquid container 4 with time, which is acquired by the data acquisition device, and calculating the infiltration rate of the solid sample 3;
the infiltration rate of the solid sample 3 was calculated by the following formula:
wherein V is the infiltration rate of the solid sample, and the unit is g/(mm)2×s)；
m 1-weight of solid sample in g after the test started to plateau;
m 2-weight of solid sample after a test period in g;
s-the cross-sectional area of the part of the solid sample immersed in the solution, in mm2；
T1-time after the test began to plateau in units of s;
t2-time after a test period, in units of s;
k is the slope of the curve of the change of the weight of the solid sample with time in the test stable section;
(10) and evaluating the wettability of the powder according to the measured wetting rate of the solid sample 3.
In the process of testing the wettability of the solid sample in the embodiment of the present application, after the solid sample 3 is partially immersed in the solution 5, as the solid sample 3 absorbs the solution 5, the wetted liquid level M2 of the solid sample 3 is higher than the liquid level M1 of the solution 5 (as shown in fig. 2), and slowly rises according to the capillary phenomenon, so that the weight of the solid sample 3 increases, the liquid in the liquid container 4 decreases, and the increase of the weight of the solid sample 3 is the amount of the solution absorbed by the solid sample 3, and therefore, the wetting rate of the solution 5 in the solid sample 3 can be known by obtaining the change of the weight of the solid sample 3 with time.
The embodiment of the application also provides application of the powder wettability evaluation method in controlling the wettability of the battery pole piece.
In embodiments of the present application, the use may comprise: the infiltration rate of the solid sample is 0.0002 g/(mm)2Xs) to 0.02 g/(mm)2Xs) in the range of the battery positive electrode active material powder, the battery negative electrode active material powder or the conductive agent powder for the battery pole piece.
For example, a solid sample having a wetting rate of 0.0002 g/(mm) can be used2Xs) to 0.005 g/(mm)2×s)、0.005g/(mm2Xs) to 0.01 g/(mm)2×s)、0.01g/(mm2Xs) to 0.02 g/(mm)2Xs) in the range of the battery positive electrode active material powder, the battery negative electrode active material powder or the conductive agent powder for the battery pole piece.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (12)
1. A method for evaluating the wettability of a powder, comprising:
s100: mixing the powder to be detected with a binder and pressing the mixture into a solid sample;
s200: testing the wettability of the solid sample pressed in the step S100;
s300: and evaluating the wettability of the powder according to the wettability of the solid sample measured in the step S200.
2. The method for evaluating wettability of a powder according to claim 1, wherein the powder to be detected is a battery positive electrode active material powder, a battery negative electrode active material powder, or a conductive agent powder for a battery electrode sheet.
3. The method of evaluating wettability of a powder according to claim 2, wherein the binder is a battery binder.
4. The method for evaluating the wettability of the powder according to claim 3, wherein the binder is one or more selected from the group consisting of polyvinylidene fluoride, styrene butadiene rubber/sodium carboxymethylcellulose, and polytetrafluoroethylene.
5. The method for evaluating wettability of powder according to any one of claims 1 to 4, wherein a weight ratio of the powder to be detected to the binder is 9:1 to 99: 1.
6. The method for evaluating wettability of powder according to any one of claims 1 to 4, wherein the solid sample has a compacted density of 1.2g/cm3To 4.0g/cm3。
7. The method for evaluating the wettability of the powder according to any one of claims 1 to 4, wherein the temperature at which the solid sample is pressed is 15 ℃ to 80 ℃.
8. The method for evaluating wettability of a powder according to any one of claims 1 to 4, wherein the solid sample is a cylinder, a rectangular parallelepiped, or a triangular prism.
9. The method for evaluating wettability of powder according to claim 1, wherein step S200 includes:
s201: immersing a portion of the solid sample in a solution, allowing the solid sample to absorb the solution, and detecting data on the change in weight of the solid sample over time during absorption of the solution by the solid sample; the cross-sectional shapes of the portions of the solid samples immersed in the solution in the immersion depth direction are the same
S202: and drawing a curve of the weight of the solid sample changing along with the time according to the data of the weight of the solid sample changing along with the time obtained by detection, and calculating the infiltration rate of the solid sample.
10. The method for evaluating wettability of powder according to claim 9, wherein the wetting rate of the solid sample is calculated by the following formula:
wherein V is the infiltration rate of the solid sample, and the unit is g/(mm)2×s)；
m 1-weight of solid sample in g after the test started to plateau;
m 2-weight of solid sample after a test period in g;
s-the cross-sectional area of the part of the solid sample immersed in the solution, in mm2；
T1-time after the test began to plateau in units of s;
t2-time after a test period, in units of s;
k-the slope of the curve of the change in weight of the solid sample with time in the test stability period.
11. Use of the powder wettability evaluation method according to any one of claims 1 to 10 in controlling wettability of a battery pole piece.
12. Use according to claim 11, comprising: the infiltration rate of the solid sample is 0.0002 g/(mm)2Xs) to 0.02 g/(mm)2Xs) in the range of the battery positive electrode active material powder, the battery negative electrode active material powder or the conductive agent powder for the battery pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110886849.3A CN113740195B (en) | 2021-08-03 | 2021-08-03 | Powder wettability evaluation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110886849.3A CN113740195B (en) | 2021-08-03 | 2021-08-03 | Powder wettability evaluation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113740195A true CN113740195A (en) | 2021-12-03 |
| CN113740195B CN113740195B (en) | 2023-07-21 |
Family
ID=78729936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110886849.3A Active CN113740195B (en) | 2021-08-03 | 2021-08-03 | Powder wettability evaluation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113740195B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252363A (en) * | 2021-12-09 | 2022-03-29 | 上海兰钧新能源科技有限公司 | Method for measuring pole piece infiltration liquid absorption amount |
| CN116008117A (en) * | 2023-03-28 | 2023-04-25 | 宁德时代新能源科技股份有限公司 | Battery infiltration test method, test equipment, device and computer equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870379A (en) * | 2019-02-28 | 2019-06-11 | 蜂巢能源科技有限公司 | For detecting the detection device and wellability detection method of wellability |
| CN109904385A (en) * | 2019-03-15 | 2019-06-18 | 惠州亿纬锂能股份有限公司 | A kind of pole piece and preparation method thereof and lithium battery |
| CN110411901A (en) * | 2018-04-26 | 2019-11-05 | 国家能源投资集团有限责任公司 | The evaluating apparatus of the wetting factor of the evaluation method and measurement electrode of liquid flow cell material of the wetting factor of electrode of liquid flow cell material |
| CN210269498U (en) * | 2019-07-11 | 2020-04-07 | 天津市捷威动力工业有限公司 | Device for rapidly testing infiltration capacity of lithium battery electrolyte to pole piece |
| CN111562193A (en) * | 2020-05-14 | 2020-08-21 | 惠州亿纬锂能股份有限公司 | Evaluation method for liquid retention effect of material for lithium ion battery |
-
2021
- 2021-08-03 CN CN202110886849.3A patent/CN113740195B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411901A (en) * | 2018-04-26 | 2019-11-05 | 国家能源投资集团有限责任公司 | The evaluating apparatus of the wetting factor of the evaluation method and measurement electrode of liquid flow cell material of the wetting factor of electrode of liquid flow cell material |
| CN109870379A (en) * | 2019-02-28 | 2019-06-11 | 蜂巢能源科技有限公司 | For detecting the detection device and wellability detection method of wellability |
| CN109904385A (en) * | 2019-03-15 | 2019-06-18 | 惠州亿纬锂能股份有限公司 | A kind of pole piece and preparation method thereof and lithium battery |
| CN210269498U (en) * | 2019-07-11 | 2020-04-07 | 天津市捷威动力工业有限公司 | Device for rapidly testing infiltration capacity of lithium battery electrolyte to pole piece |
| CN111562193A (en) * | 2020-05-14 | 2020-08-21 | 惠州亿纬锂能股份有限公司 | Evaluation method for liquid retention effect of material for lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252363A (en) * | 2021-12-09 | 2022-03-29 | 上海兰钧新能源科技有限公司 | Method for measuring pole piece infiltration liquid absorption amount |
| CN116008117A (en) * | 2023-03-28 | 2023-04-25 | 宁德时代新能源科技股份有限公司 | Battery infiltration test method, test equipment, device and computer equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113740195B (en) | 2023-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113740195A (en) | Powder wettability evaluation method and application thereof | |
| JP2575840B2 (en) | Dry manufacturing method of hydrogen storage alloy electrode | |
| Yanilmaz et al. | Fabrication and characterization of SiO2/PVDF composite nanofiber‐coated PP nonwoven separators for lithium‐ion batteries | |
| Choudhury et al. | Chitosan hydrogel-based electrode binder and electrolyte membrane for EDLCs: experimental studies and model validation | |
| US20160118668A1 (en) | Carbon additives for negative electrodes | |
| JP2008210636A (en) | Energy conversion device | |
| Caillon-Caravanier et al. | Absorption ability and kinetics of a liquid electrolyte in PVDF–HFP copolymer containing or not SiO2 | |
| US20200011936A1 (en) | Primary alkaline battery with integrated in-cell resistances | |
| CN101283422A (en) | Polarizable electrode and electrical double layer capacitor | |
| CN102099948A (en) | Enhanced negative plates for lead acid batteries | |
| CN101311703A (en) | Method and device for measuring non-aqueous electrolyte battery moisture | |
| CN106769599A (en) | A kind of method of testing of electrodes of lithium-ion batteries porosity | |
| US20140120386A1 (en) | Over-Saturated Absorbed Glass Mat Valve Regulated Lead-Acid Battery Comprising Carbon Additives | |
| CN109887762A (en) | A kind of preparation method of the nitrogen sulphur codope carbon material based on hemicellulose | |
| Lu et al. | Influence of different silica gelling agents on the performance of aqueous gel electrolytes | |
| CN104659350B (en) | Method for secondary modification of surface of active carbon material for super battery | |
| JP5167981B2 (en) | Activated carbon for electrode material and power storage device | |
| JP2010225564A (en) | Negative electrode composition for secondary battery, intermediate composition for generating the same, and secondary battery using them | |
| Fu et al. | Influence of solvent type on porosity structure and properties of polymer separator for the Li-ion batteries | |
| Bidin et al. | Solid terpolymer electrolyte based on poly (vinyl butyral‐co‐vinyl alcohol‐co‐vinyl acetate) incorporated with lithium salt and tetraglyme for EDLCs | |
| JP2005239456A (en) | Nitrogen-containing carbon and method of manufacturing the same | |
| CN106471653A (en) | Electrode for nonaqueous electrolyte secondary battery, its manufacture method and rechargeable nonaqueous electrolytic battery | |
| CN110698723B (en) | Multifunctional anti-fatigue graphene composite sponge and preparation method and application thereof | |
| JP5874734B2 (en) | Control valve type lead acid battery | |
| JPS5882472A (en) | Lead storage battery and manufacture thereof |
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 |