A kind of preparation method of flexible battery

Abstract

The invention belongs to the technical field of batteries, and in particular relates to a method for preparing a flexible battery, comprising the following steps: preparing at least two electrically connected flexible battery units and performing insulation treatment on them; connecting the flexible battery units in series or in parallel connected and wrapped in a flexible packaging bag, and heat-seal one side and the top side; inject electrolyte into the flexible packaging bag, and seal the other side; perform formation on the battery, and collect the gas generated by the formation In an air bag reserved on the flexible packaging bag, the air bag is punctured to release the gas generated by chemical synthesis, and the air bag and the excess side are cut off to obtain a flexible battery. Compared with the independent packaging of a single flexible battery unit, the preparation method of the flexible battery provided by the present invention increases the capacitance or output voltage of the flexible battery, reduces the number of packaging times of the flexible battery, saves packaging materials, and improves the packaging efficiency .

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a preparation method of a flexible battery. Background technique [0002] As we all know, the shape of the current commercialized single lithium-ion battery mainly includes (1) the rectangular shape represented by the application in smart phones, tablet computers and other products, (2) the shape used in light electric tools, electric bicycles, Tesla electric 18650, 26650, and button battery as the representative cylinder type in cars, electronic watches and other products, (3) "knife type" and "apple type" represented by Apple music players, Bluetooth headsets and other products Isoplanar shaped battery. None of the above shapes of single battery can bend itself, so it is rarely used in complex or comfortable wearable devices that require flexibility of the battery. [0003] For the current smart wearable device market, the existing traditional battery technology...

AI Technical Summary

Problems solved by technology

However, this traditional method often increases the number of batteries connected in series and parallel, and at the same time complicates the battery assembly process and the charge and discharge management system (PCM).

On the other hand, the smaller the battery space is divided, that is, the smaller the size of a small battery cell, the lower its energy density, which in turn leads to problems such as short working hours of smart devices and reduced customer experience in the same unit space.

[0004] The Chinese patent with the patent number CN203026608U discloses a bendable flexible battery in which battery cells are connected in parallel and packaged in a flexible packaging bag. This patent provides some solutions for the power supply design scheme of wearable smart devices; but its The cell unit itself of the disclosed flexible battery is still not bendable. In addition, the bending degree of the entire battery is directly related to the number of single cells connected in parallel and the width of the single cells, and its flexibility and freedom are greatly restricted. At the same time, due to the limitation of the parallel connection between its single cells, its output voltage has no advantage compared with traditional single cells

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