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Flexible package lithium ion battery and manufacturing method thereof

A lithium-ion battery and a manufacturing method technology, which are applied in the manufacture of electrolyte storage batteries, battery pack components, and final product manufacturing, etc., can solve the problems of external PTC solder joints falling off, easy loss of protection function, short circuit of external tabs, etc. The effect of stable and reliable fixation, reliable protection and not easy to be damaged

Active Publication Date: 2016-11-23
SPRINGPOWER TECHNOLOGY (SHENZHEN) CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing soft-packed lithium-ion battery uses a soft-packed cell externally connected to a PTC, the fixation is not stable, and the outer tabs are short-circuited and the external PTC solder joints fall off when encountering a collision impact, and the protection function is easily lost. Provided is a flexible packaging lithium-ion battery and a manufacturing method thereof

Method used

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  • Flexible package lithium ion battery and manufacturing method thereof
  • Flexible package lithium ion battery and manufacturing method thereof
  • Flexible package lithium ion battery and manufacturing method thereof

Examples

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Embodiment 1

[0074] This example will specifically explain the manufacturing method of the soft-packaged lithium-ion battery disclosed in the present invention, which is equivalent to explaining the structure of the soft-packaged lithium-ion battery. The manufacturing method specifically includes the following steps:

[0075] S1. The manufacturing steps of the soft-packed battery cell: manufacture the core and the electrolyte, and use the aluminum-plastic composite film to make the battery shell; package the roll core and the electrolyte in the battery shell, and manufacture the soft-packed battery; The structure of the soft-packed battery is as follows: Figure 1-Figure 3 shown;

[0076] The cell casing includes a bottom seal 13 at the bottom, side seals 12 on both sides and a top seal 11 at the top; the core is provided with tabs 10, and the tabs 10 include a first pole Ear 10a and second pole ear 10b, the first pole ear 10a and the second pole ear 10b are drawn out from the top sealing...

Embodiment 2

[0111] According to the manufacturing method of the soft-package lithium-ion battery provided in the above-mentioned embodiment 1, this example explains the structure of the soft-package lithium-ion battery for comparison. Please refer to the drawings and descriptions of the drawings for understanding.

[0112] This example provides a soft package lithium ion battery, including a soft package battery cell 1, a PTC2, a first electrode sheet T1, a second electrode sheet T2 and a soft package shell made of aluminum-plastic composite film; the soft package battery cell 1 and the PTC2 are packaged in the soft case;

[0113] The soft pack cell 1 includes a cell shell made of an aluminum-plastic composite film and a coil core and an electrolyte packaged in the cell shell; the structure of the soft pack cell 1 is as follows: Figure 1-Figure 3 As shown; the cell housing includes a bottom seal 13 at the bottom, side seals 12 on both sides and a top seal 11 at the top; the core is provi...

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Abstract

The existing flexible package lithium ion battery utilizes flexible package cell external connection with PTC and has poor fixing stability and easily causes outer tab short circuit and external PTC welding spot shedding in collision or impact so that a protection function is easily lost. In order to solve the above problem, the invention provides a flexible package lithium ion battery and a manufacturing method thereof. The flexible package lithium ion battery comprises a flexible package cell, PTC, a first electrode slice, a second electrode slice and a flexible package casing prepared from a plastic-aluminum composite film. The flexible package cell and the PTC are packaged in the flexible package casing. The first electrode slice and the second electrode slice stretch out of the flexible package casing. Compared with the existing flexible package lithium ion battery using an external PTC way, the flexible package lithium ion battery prevents PTC failure, realizes reliable protection and has high safety.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to the field of soft packaging lithium ion batteries. Background technique [0002] Lithium-ion batteries have been widely used in electronic equipment, and also play an important role in the field of energy storage for new energy development. Soft-packed lithium-ion batteries use aluminum-plastic film as the casing, which can buffer the gas pressure generated by the gasification of the electrolyte when the battery temperature rises to prevent explosions, and the bulging phenomenon makes the batteries have obvious signs before fire and explosion, so they have higher Focused on safety. [0003] However, when the soft-packed lithium-ion battery is short-circuited outside, the continuous excessive current will still generate a lot of heat inside the soft-packed battery, causing the electrolyte to vaporize and bulge and deform, and the heat accumulated at the tab will melt the tab ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/26H01M10/058
CPCY02E60/10Y02P70/50
Inventor 卢国杰刘志远韩晓辉黄波程君李文良李光兴
Owner SPRINGPOWER TECHNOLOGY (SHENZHEN) CO LTD
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