Laminated soft package metal-air battery and preparation method thereof

Abstract

The invention discloses a laminated soft package metal-air battery and a preparation method thereof. The laminated soft package metal-air battery is composed of a packaging shell, a battery cell groove, a battery cell, an electrolyte, and an electrolyte injection and gas conduction device, the battery cell comprises a porous positive plate, a diaphragm, a negative plate, a positive lug and a negative lug, and the porous positive plate, the diaphragm and the negative plate are sequentially stacked to form a laminated structure; the electrolyte injection and gas conduction device is at least onehollow pipe and is connected with the packaging shell, one end of the electrolyte injection and gas conduction device extends into the battery cell groove, and the other end of the electrolyte injection and gas conduction device is connected with an electrolyte supply device or a gas supply and collection device. According to the laminated soft package metal-air battery disclosed by the invention, a positive electrode shell does not need to be punched, so that the problem of poor contact of a battery cell at the punched position of the positive electrode shell is solved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a laminated soft-clad metal-air battery and a preparation method thereof. Background technique [0002] The energy density of traditional lithium-ion batteries approaches the theoretical limit, which cannot meet the growing needs of modern society. As a new type of high-energy battery system, metal-air batteries have the characteristics of high energy density and environmental friendliness, and have great application prospects in the fields of portable electronic devices and power batteries. [0003] At present, most of the research on metal-air batteries adopts a button structure with holes in the positive electrode shell, and the reactant gas enters the battery from the pores on the positive electrode shell to participate in the reaction. However, the air holes in the positive electrode shell cannot compress the internal cells well, which makes the internal contact of the ce...

AI Technical Summary

Problems solved by technology

However, the air holes in the positive electrode shell cannot compress the internal cells well, which makes the internal contact of the cells worse and affects the overall performance of the battery.

At the same time, if the ratio of the pore area to the positive electrode shell is too small, it will affect the diffusion of the reactant gas into the battery cell, and if it is too large, it will speed up the volatilization rate of the electrolyte and affect the service life of the battery.

In addition, the energy density and specific energy of a lithium-air battery cell with a button structure are too low, which is only suitable for basic research and cannot meet commercial needs.

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