阅读说明：本技术 一种高抗摔性软包锂电池的装配、包装工艺 (Assembling and packaging process of high-falling-resistance soft-package lithium battery ) 是由 李陆寅 于 2019-07-19 设计创作，主要内容包括：本发明提供一种高抗摔性软包锂电池的装配、包装工艺,装配工艺步骤为：使正极片、负极片和隔膜卷绕形成卷芯,在卷芯卷绕的收尾处粘贴胶纸以收紧卷芯,制得待装配电芯；将壳体的内表面涂布一层丙烯酸粘胶,将步骤一制得的待装配电芯装入壳体内并拆除胶纸,使其卷芯与丙烯酸粘胶贴合,热固化,然后完成顶封、侧封,制得待注液软包电池；将电解液注入软包电池内后密封,制得高抗摔性软包锂电池。本发明装配工艺采用丙烯酸粘胶将电芯与壳体进行固定,壳体受到压力或冲击时,丙烯酸粘胶也可作为壳体与电芯之间的缓冲,从而避免了电解液泄漏甚至爆炸的情况,生产出来的锂电池厚度均一性高,抗摔性良好,降低了安全风险。(The invention provides an assembling and packaging process of a high-falling-resistance soft package lithium battery, which comprises the following steps: winding the positive plate, the negative plate and the diaphragm to form a winding core, and sticking adhesive paper at the winding end of the winding core to tighten the winding core to obtain the battery core to be assembled; coating a layer of acrylic acid viscose on the inner surface of the shell, loading the battery core to be assembled prepared in the step one into the shell, removing the adhesive paper, enabling the winding core to be attached to the acrylic acid viscose, performing thermocuring, and then finishing top sealing and side sealing to prepare the soft package battery to be injected with liquid; and (4) injecting the electrolyte into the soft package battery and then sealing to prepare the high-falling-resistance soft package lithium battery. According to the assembly process, the battery core and the shell are fixed by the acrylic acid viscose, and the acrylic acid viscose can also be used as a buffer between the shell and the battery core when the shell is stressed or impacted, so that the situations of electrolyte leakage and even explosion are avoided, the produced lithium battery is high in thickness uniformity and good in anti-falling performance, and the safety risk is reduced.)

1. The assembly process of the high-falling-resistance soft package lithium battery is characterized by comprising the following specific steps of:

step one, rolling the battery cell to be assembled,

Winding the positive plate, the negative plate and the diaphragm to form a winding core, adhering adhesive paper at the winding end of the winding core to tighten the winding core, and extending part of the adhesive paper to the end face of one end of the winding core to obtain the battery core to be assembled;

Step two, assembling the soft package battery,

Coating a layer of acrylic acid viscose on the inner surface of the shell, loading the battery core to be assembled prepared in the step one into the shell, removing the adhesive paper, enabling the winding core to be attached to the acrylic acid viscose, performing thermocuring, and then finishing top sealing and side sealing to prepare the soft package battery to be injected with liquid;

Step three, injecting liquid,

and (4) injecting the electrolyte into the soft package battery and then sealing to prepare the high-falling-resistance soft package lithium battery.

2. the process for assembling a soft lithium battery with high falling resistance as claimed in claim 1, wherein the gummed paper used in the first step is made of polypropylene, polyethylene terephthalate or polyimide.

3. The assembly process of the soft-package lithium battery with high drop resistance as claimed in claim 2, wherein before assembling the battery core to be assembled in the second step, one tab of the winding core is connected with the positive electrode of the shell, and the other tab is connected with the negative electrode of the shell.

4. The assembling process of the high-fall-resistance soft-package lithium battery according to claim 3, wherein the acrylic acid viscose in the formula of the second step comprises the following components in parts by weight:

20-50 parts of methyl acrylate,

10-20 parts of 2-ethylhexyl acrylate,

10-20 parts of ethyl acrylate,

30-40 parts of isooctyl acrylate,

12-22 parts of nano porous silicon dioxide,

1-5 parts of rosin resin,

2-6 parts of Bian Ming Bian,

0.1 to 0.5 portion of initiator,

100 parts of organic solvent.

5. the packaging process of the high-falling-resistance soft-package lithium battery prepared by the assembly process of claim 4 is characterized by comprising the following specific steps of:

Step a, gluing the bottom surface of kraft paper, and adding base paper on the bottom surface of the kraft paper;

Step b, die-cutting kraft paper into blocks by adopting a die-cutting process without cutting base paper;

and c, attaching the surface of the kraft paper coated with the glue to the outer surface of the shell, so that the kraft paper covers the whole side surface of the shell.

Technical Field

The invention relates to the technical field of battery assembly, in particular to an assembly and packaging process of a high-falling-resistance soft package lithium battery.

Background

The lithium battery is a primary battery which uses lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution, and the lithium metal has very high requirements on the environment due to the very active chemical characteristics of the lithium metal, so that the lithium metal is processed, stored and used. Under current assembly process, generally not being equipped with relative fixed measure between electric core and the casing, make electric core have certain mobilizable spaciousness in the casing, when the lithium cell takes place to drop, receives the impact, easily takes place the condition that electrolyte leaked or even exploded, increased the potential safety hazard of lithium cell.

Disclosure of Invention

the invention aims to overcome the defects of the prior art and provides an assembling and packaging process of a high-falling-resistance soft package lithium battery.

In order to achieve the purpose, the invention adopts the following technical scheme:

An assembly process of a high-falling-resistance soft package lithium battery comprises the following specific steps:

Step one, rolling the battery cell to be assembled,

Winding the positive plate, the negative plate and the diaphragm to form a winding core, adhering adhesive paper at the winding end of the winding core to tighten the winding core, and extending part of the adhesive paper to the end face of one end of the winding core to obtain the battery core to be assembled;

Step two, assembling the soft package battery,

coating a layer of acrylic acid viscose on the inner surface of the shell, loading the battery core to be assembled prepared in the step one into the shell, removing the adhesive paper, enabling the winding core to be attached to the acrylic acid viscose, performing thermocuring, and then finishing top sealing and side sealing to prepare the soft package battery to be injected with liquid;

Step three, injecting liquid,

and (4) injecting the electrolyte into the soft package battery and then sealing to prepare the high-falling-resistance soft package lithium battery.

Further, the gummed paper used in the first step is made of polypropylene, polyethylene terephthalate or polyimide.

furthermore, before assembling the electric core to be assembled in the second step, one tab of the winding core needs to be connected with the positive electrode of the shell, and the other tab of the winding core needs to be connected with the negative electrode of the shell.

further, the acrylic acid viscose glue in the step two comprises the following components in parts by weight:

20-50 parts of methyl acrylate,

10-20 parts of 2-ethylhexyl acrylate,

10-20 parts of ethyl acrylate,

30-40 parts of isooctyl acrylate,

12-22 parts of nano porous silicon dioxide,

1-5 parts of rosin resin,

2-6 parts of Bian Ming Bian,

0.1 to 0.5 portion of initiator,

100 parts of organic solvent.

a packaging process of a high-falling-resistance soft package lithium battery comprises the following specific steps:

step a, gluing the bottom surface of kraft paper, and adding base paper on the bottom surface of the kraft paper;

Step b, die-cutting kraft paper into blocks by adopting a die-cutting process without cutting base paper;

And c, attaching the surface of the kraft paper coated with the glue to the outer surface of the shell, so that the kraft paper covers the whole side surface of the shell.

the invention has the beneficial effects that: according to the assembly process, the battery core and the shell are fixed by the acrylic acid viscose, and the acrylic acid viscose can also be used as a buffer between the shell and the battery core when the shell is stressed or impacted, so that the situations of electrolyte leakage and even explosion are avoided, the produced lithium battery is high in thickness uniformity and good in anti-falling performance, and the safety risk is reduced.

Detailed Description

The invention is further illustrated by the following examples:

an assembly process of a high-falling-resistance soft package lithium battery comprises the following specific steps:

Step one, rolling the battery cell to be assembled,

Winding the positive plate, the negative plate and the diaphragm to form a winding core, adhering adhesive paper at the winding end of the winding core to tighten the winding core, and extending part of the adhesive paper to the end face of one end of the winding core to obtain the battery core to be assembled;

step two, assembling the soft package battery,

coating a layer of acrylic acid viscose on the inner surface of the shell, loading the battery core to be assembled prepared in the step one into the shell, removing the adhesive paper, enabling the winding core to be attached to the acrylic acid viscose, performing thermocuring, and then finishing top sealing and side sealing to prepare the soft package battery to be injected with liquid;

Step three, injecting liquid,

And (4) injecting the electrolyte into the soft package battery and then sealing to prepare the high-falling-resistance soft package lithium battery.

Further, the gummed paper used in the first step is made of polypropylene, polyethylene terephthalate or polyimide.

Furthermore, before assembling the electric core to be assembled in the second step, one tab of the winding core needs to be connected with the positive electrode of the shell, and the other tab of the winding core needs to be connected with the negative electrode of the shell.

further, the acrylic acid viscose glue in the step two comprises the following components in parts by weight:

20-50 parts of methyl acrylate,

10-20 parts of 2-ethylhexyl acrylate,

10-20 parts of ethyl acrylate,

30-40 parts of isooctyl acrylate,

12-22 parts of nano porous silicon dioxide,

1-5 parts of rosin resin,

2-6 parts of Bian Ming Bian,

0.1 to 0.5 portion of initiator,

100 parts of organic solvent.

A packaging process of a high-falling-resistance soft package lithium battery comprises the following specific steps:

Step a, gluing the bottom surface of kraft paper, and adding base paper on the bottom surface of the kraft paper;

step b, die-cutting kraft paper into blocks by adopting a die-cutting process without cutting base paper;

And c, attaching the surface of the kraft paper coated with the glue to the outer surface of the shell, so that the kraft paper covers the whole side surface of the shell.

according to the assembly process, the battery core and the shell are fixed by the acrylic acid viscose, and the acrylic acid viscose can also be used as a buffer between the shell and the battery core when the shell is stressed or impacted, so that the situations of electrolyte leakage and even explosion are avoided, the produced lithium battery is high in thickness uniformity and good in anti-falling performance, and the safety risk is reduced.