Bendable Shaped Batteries

Abstract

The invention discloses a bendable special-shaped battery, which includes a diaphragm, positive and negative pole pieces, electrolyte and positive and negative pole ears, the pole piece is made of conductive carbon cloth as a current collector, and the outer surface of the conductive carbon cloth is provided with active materials; the diaphragm It is a three-layer structure diaphragm with ion conduction and electronic insulation. The diaphragm is treated with a non-woven film to make carbon nanotubes stably dispersed and adsorbed on the non-woven fiber network, and then undergoes in-situ polymerization reaction with aniline monomer. The polyaniline particles are deposited on the non-woven fiber net in a gradually decreasing manner from the outside to the inside to form a three-layer structure diaphragm with an isolation layer in the middle and a conductive layer on both sides; Closed on both sides of the diaphragm, the outer package is sealed by a soft packaging film, and one end of the positive tab and one end of the negative tab are placed outside the soft packaging film to facilitate electrical connection with external equipment. The bendable special-shaped battery of the invention has high ion conductivity and good electrochemical performance.

Description

technical field [0001] The invention relates to the field of battery production. More specifically, the present invention relates to a bendable shaped battery. Background technique [0002] With the birth of wearable electronic products and the growing market demand, personalized digital products emerge in an endless stream, such as wrist mobile phones, wrist watches, special-shaped Bluetooth, wrist pressure gauges and other wearable electronic devices. In order to improve the attachment of wearable electronic devices to the human body and the utilization of space, these electronic devices are usually arranged in special shapes or curved shapes, and the demand for special-shaped battery products is increasing. The expectation for special-shaped batteries is that they can be bent and set according to different space requirements. However, at present, when bending special-shaped batteries, it is easy to cause damage to the pole piece and internal structure, which affects the ...

AI Technical Summary

Problems solved by technology

In this prior art, the method of arranging a tank body on the active layer on the surface of the current collector reduces the amount of active material, easily exposes the current collector to the electrolyte, and reduces the electrochemical capacity.

The elastic part is filled in the tank, so that part of the active material cannot be infiltrated, and it is not conducive to the development of battery capacity.

Therefore, although this prior art can facilitate the bending of the pole piece without damaging the performance of the pole piece, the reduction of the amount of active material and the problem that some active material cannot be infiltrated affect the electrochemical performance of the battery.

[0004] Aiming at the problem that the amount of active material is reduced and part of the active material cannot be infiltrated in the prior art, the prior art discloses a flexible secondary battery and its components, and the notification number is CN 109273755 A, which does not set the current collector and other hard structures to improve the flexibility of the battery, avoiding the problem of the reduction of the amount of active materials and the inability of some active materials to infiltrate. By adding a conductive additive with ion conduction and electronic insulation properties in the electrolyte, the purpose is to increase the current. The ability to converge to the positive and negative electrodes, but it is difficult to mix and evenly distribute the conductive additives with the electrolyte, and the conductive additives with ionic conduction and electronic insulation properties are difficult to meet the requirements for current to converge to the positive and negative electrodes

And there is another defect in this prior art: the non-woven film is used as the diaphragm of the flexible battery, the diffusion rate of ions is slow, and the ion conductivity is low, which affects the electrochemical performance of the battery.

In the prior art, the addition of conductive additives with ionic conduction and electronic insulation properties can promote ionic conduction and electronic insulation to the diaphragm, because it is difficult to mix and evenly distribute the conductive additives with the electrolyte, and they are distributed on the diaphragm. Internal and external, it is not conducive to promoting ion conduction to the diaphragm, but instead increases the internal resistance of the diaphragm, which is not conducive to ion diffusion and affects the electrochemical performance of the battery

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