Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of electrochemical battery and preparation method thereof

An electrochemical and battery technology, applied in the field of electrochemical batteries, can solve problems such as package failure, achieve the effect of solving drops and improving package reliability

Active Publication Date: 2018-01-19
GUANGDONG ZHUGUANG NEW ENERGY TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this method uses flowable glue, in the actual production process, the glue is easy to flow to the edge of the outgassing package, resulting in package failure

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
  • A kind of electrochemical battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, different from the comparative example, the present embodiment comprises the following steps:

[0035]Bare cell preparation: select a separator with a thickness of 12 μm, and wind it together with the above-mentioned positive electrode sheet and negative electrode sheet, and control the negative electrode current collector, positive electrode coating, negative electrode coating, and separator at the end of the bare cell during winding. The same surface B1; the positive current collector ends on the other surface B2 of the bare cell, and the last edge of the bare cell bypassed by the positive current collector before the end is the degassing packaging edge, and the distance between the closing line and the degassing packaging edge is 4mm ;

[0036] Adhesive layer setting: select polypropylene as the base material and polyvinylidene fluoride as the adhesive layer, paste it on the surface of the positive electrode collector side of the bare cell, and the area...

Embodiment 2

[0038] Embodiment 2, different from Embodiment 1, this embodiment includes the following steps:

[0039] Bare cell preparation: select a separator with a thickness of 12 μm, wind it together with the above-mentioned positive electrode sheet and negative electrode sheet, and control the positive electrode collector and separator to end on the same surface B1 of the bare cell during winding; the negative electrode collector, Double-sided positive coating layer and double-sided negative coating finish on the other surface B2 of the bare cell, and the last bare cell that is bypassed before the negative current collector, double-sided positive coating layer and double-sided negative coating are finished The edge is the edge of the degassing package, and the distance between the end line and the edge of the degassing package is 6mm;

[0040] Adhesive layer setting: Choose polypropylene as the base material and polyvinylidene fluoride as the adhesive tape, stick it on the surface of ...

Embodiment 3

[0042] Embodiment 3, different from Embodiment 1, this embodiment includes the following steps:

[0043] Positive electrode sheet preparation: select an aluminum foil with a thickness of 4 μm as the current collector, coat the positive electrode slurry on its surface, and obtain a positive electrode diaphragm with a thickness of 75 μm coated on one side after cold pressing;

[0044] The rest are the same as in Embodiment 1 and will not be repeated here.

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of electrochemical batteries, and in particular relates to an electrochemical battery: comprising a bare cell, an outer package and an electrolyte, the outer package is made of a soft material, and the outer package includes a main packaging part, a bare cell The packaging side and the degassing packaging side of the bag; an adhesive layer is arranged between the bare cell and the outer packaging, and the adhesive layer connects the bare cell to the outer packaging after being heated or / and pressed. The package is bonded together; the maximum thickness area of ​​the bare cell is area A, and the maximum thickness value is h1; the minimum thickness between the area A and the adhesive layer is h2, and h1‑h2≥4μm . The invention can effectively bond the bare cell and the outer packaging together, thereby solving the battery drop problem; at the same time, a "barrier wall" with a height of not less than 4 μm can be established between the adhesive layer and the degassing packaging edge , Effectively prevent the glue of the adhesive layer from diffusing to the side of the degassing package, thereby solving the problem of battery package reliability.

Description

technical field [0001] The invention belongs to the field of electrochemical batteries, in particular to an electrochemical battery and a preparation method thereof. Background technique [0002] After entering the 21st century, various electronic device products such as mobile phones, notebooks, wearable devices, etc. emerge in an endless stream, which greatly enriches the lives of the majority of users; at the same time, electric vehicles and various energy storage power stations are also rapidly sprouting, developing, and grow. The above high-tech products have a common feature: high-performance batteries are required to act as energy storage components. [0003] Existing batteries mainly include primary batteries and secondary batteries; the so-called primary batteries, that is, batteries that cannot be recharged, mainly include carbon-zinc batteries, alkaline batteries, paste-type zinc-manganese batteries, cardboard zinc-manganese batteries, alkaline Zinc-manganese ba...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M2/02H01M50/121H01M50/129
CPCH01M10/0431H01M50/116Y02E60/10Y02P70/50
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH