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Electrochemical battery and preparation method thereof

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

Active Publication Date: 2016-02-24
GUANGDONG ZHUGUANG NEW ENERGY TECH
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  • 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

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  • Electrochemical battery and preparation method thereof

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Experimental program
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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.

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Abstract

The invention belongs to the field of electrochemical batteries and particularly relates to an electrochemical battery. The electrochemical battery comprises a naked battery core, an outer package and an electrolyte, wherein the outer package is made of a soft material and comprises a main body package part, a naked battery core bagging packaging edge and a degassing packaging edge; an adhesive layer is arranged between the naked battery core and the outer package; the naked battery core and the outer package are adhered together after the adhesive layer is heated or / and pressed; the maximal thickness region of the naked battery core is a region A; the maximal thickness value is h1; the minimal thickness between the region A and the adhesive layer is h2; and h1-h2 is greater than or equal to 4 microns. According to the electrochemical battery, the naked battery core and the outer package can be effectively adhered together, so that the problem of dropping of the battery is solved. Meanwhile, a 'barrier wall' of which the height is not less than 4 microns can be built between the adhesive layer and the degassing packaging edge; and glue of the adhesive layer is effectively prevented from diffusing to the degassing packaging edge, so that the problem of the packaging reliability of the battery is solved.

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

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Application Information

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IPC IPC(8): H01M10/04H01M2/02H01M50/121H01M50/129
CPCH01M10/0431H01M50/116Y02E60/10Y02P70/50
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH
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