Electrochemical battery and preparation method thereof

An electrochemical and battery technology, applied in the field of electrochemical batteries, to achieve the effect of solving the drop

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

The battery of the present invention is provided with an adhesive layer between the bare cell and the outer package, which can effectively bond the bare cell and the outer package together, thereby solving the problem of battery drop; at the same time, h1 ≥ 4 μm, it can A "barrier wall" with a height of not less than 4 μm is established between the layer and the side of the degassing package, which can effectively prevent the glue of the adhesive layer from diffusing to the side of the degassing package, thereby solving the problem of battery packaging reliability

Method used

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  • Electrochemical battery and preparation method thereof

Examples

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Effect test

Embodiment 1

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

[0035] Adhesive layer setting: choose polypropylene as the base material and polyvinylidene fluoride as the adhesive tape, and paste it on the surface of the bare cell. The distance between the adhesive area and the degassing packaging surface is 2mm. A layer of yellow glue with a thickness of 4 μm is arranged between the sides of the degassing package, and the yellow tape is parallel to the side of the degassing package and runs through the entire bare cell; the adhesive layer covers 60% of the surface area of ​​the bare cell, and then the bare cell Put it in an aluminum-plastic film packaging bag for top sealing and side sealing;

[0036] The rest are the same as those of the comparative example, and will not be repeated here.

Embodiment 2

[0037] Embodiment 2, different from Embodiment 1, this embodiment includes the following steps:

[0038] Adhesive layer setting: select polypropylene as the base material and polyvinylidene fluoride as the adhesive tape, and paste it on the surface of the bare cell. The distance between the adhesive area and the degassing packaging surface is 4mm. A layer of green adhesive with a thickness of 10 μm is arranged between the sides of the degassing package, and the green tape is parallel to the side of the degassing package and runs through the entire bare cell; the adhesive layer covers 60% of the surface area of ​​the bare cell, and then the bare cell Put it in an aluminum-plastic film packaging bag for top sealing and side sealing;

[0039] The rest are the same as in Embodiment 1 and will not be repeated here.

Embodiment 3

[0040] Embodiment 3, different from Embodiment 1, this embodiment includes the following steps:

[0041] Adhesive layer setting: select polypropylene as the base material and polyvinylidene fluoride as the adhesive tape, paste it on the surface of the bare cell, the distance between the adhesive area and the degassing packaging surface is 6mm, and then connect A layer of isolation film with a thickness of 12 μm is arranged between the sides of the degassing package, and the isolation film is parallel to the side of the degassing package and runs through the entire bare cell; the adhesive layer covers 60% of the surface area of ​​the bare cell, and then the bare cell Put it in an aluminum-plastic film packaging bag for top sealing and side sealing;

[0042] 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; in a region between the edge of one side, close to the degassing packaging edge, of the adhesive layer and the degassing packaging edge, the number of layers of a naked battery core assembly is greater than that of the naked battery core assembly in an adhesive layer coverage region; the thickness of the excessive naked battery core assembly is h1; and h1 is greater than or equal to 4 microns. According to the battery disclosed by the invention, h1 is greater than or equal to 4 microns; 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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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M2/18H01M2/14H01M50/403H01M50/46H01M50/489
CPCH01M10/0431H01M50/403H01M50/463Y02E60/10Y02P70/50
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH
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