A negative electrode sheet and a stacked lithium-ion battery including the negative electrode sheet
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A negative electrode sheet and negative electrode technology, which is applied in the field of stacked lithium-ion batteries, can solve the problems of not being well compatible with high energy density and fast charging.
Active Publication Date: 2021-07-06
ZHUHAI COSMX BATTERY CO LTD
View PDF10 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, the current lithium-ion batteries are not well compatible with the two properties of high energy density and fast charging.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0065] (1) Add 0.5wt% conductive carbon black, 1.3wt% styrene-butadiene rubber, and 1.3wt% carboxymethyl cellulose to 96.9wt% graphite a, and then adjust it into negative electrode slurry A with water. Add 0.5wt% conductive carbon black, 1.3wt% styrene-butadiene rubber, and 1.3wt% carboxymethyl cellulose to 96.9wt% graphite b, and then adjust it into negative electrode slurry B with water.
[0066] Such as Figure 4 As shown, the negative electrode sheet includes a negative electrode collector, and a central area, a first edge, a second edge, a third edge, and a fourth edge are provided on the first surface of the negative electrode collector; the first edge, The second edge, the third edge and the fourth edge are arranged around the central area, and the first edge and the third edge are arranged opposite; the second edge and the fourth edge are arranged opposite;
[0067] Wherein, a first coating area is set in the central area, and a second coating area is set in the first...
Embodiment 2
[0073] Others are the same as in Example 1, only the area of double-layer coating is different, that is, the area of the first coating area is 1 / 2 of the sum of the areas of the first coating area and the second coating area, such as Figure 4 As shown, the areas of the first edge, the second edge, the third edge and the fourth edge are all 1 / 8.
Embodiment 3
[0075] Others are the same as in Example 1, except that the compositions of slurry A and slurry B are different.
[0076] Add 0.5wt% conductive carbon black, 1.3wt% styrene-butadiene rubber, and 1.3wt% carboxymethyl cellulose to 96.9wt% graphite a, and then adjust with water to prepare negative electrode slurry A. Add 1.0wt% conductive carbon black, 1.3wt% styrene-butadiene rubber, and 1.3wt% carboxymethyl cellulose to 96.4wt% graphite b, and then adjust with water to prepare negative electrode slurry B.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a negative electrode sheet and a laminated lithium-ion battery including the negative electrode sheet. The laminated lithium-ion battery using the negative electrode sheet can effectively increase the energy density of the laminated lithium-ion battery without loss of energy density. Fast charging capability of ion batteries. The negative electrode sheet of the present invention adopts double-layer coating technology, and the active material and surface density of the negative electrode sheet are specifically designed according to the potential and polarization distribution of the negative electrode sheet, and the edge position of the electrode sheet of the negative electrode sheet is controlled by using the double-layer coating technology. Double-layer coating is adopted; on the one hand, the accumulation mode of the negative electrode active material particles can be changed by double-layer coating, the edge polarization can be reduced, the reaction site can be increased, and the internal resistance can be reduced, so that lithium will not be precipitated at the edge; on the other hand, compared with a single Layer coating and double-layer coating can ensure a faster charging speed at the same surface density, so there will be no loss of energy density.
Description
technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a negative electrode sheet and a laminated lithium ion battery including the negative electrode sheet. Background technique [0002] With the development of electronic products, people no longer only pursue high energy density for lithium-ion batteries, and charging speed has become one of the key evaluation criteria for consumers. However, the current lithium-ion batteries are not well compatible with the two properties of high energy density and fast charging. Contents of the invention [0003] The invention provides a negative electrode sheet and a laminated lithium ion battery including the negative electrode sheet. The laminated lithium ion battery using the negative electrode sheet can effectively improve the energy density of the laminated lithium ion battery without loss of energy density. The fast charging capability of the battery. [0004]...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more