A kind of laminated soft pack metal-air battery and its preparation method

Abstract

The invention discloses a laminated soft-packed metal-air battery and a preparation method thereof. The laminated soft-packed metal-air battery is composed of a packaging shell, a battery cell, a battery core, an electrolyte, electrolyte injection and gas The conduction device is composed; the battery core includes a porous positive electrode sheet, a diaphragm, a negative electrode sheet, a positive electrode ear and a negative electrode ear, wherein the porous positive electrode sheet, the diaphragm and the negative electrode sheet are stacked in sequence to form a laminated structure; the electrolyte injection and gas conduction devices are at least 1 hollow pipe, which is connected to the packaging shell, one end extends into the battery cell, and the other end is connected to the electrolyte supply device or the gas supply and collection device. The laminated soft-packed metal-air battery of the present invention does not need to punch holes on the positive electrode shell, and solves the problem of poor contact of the cells at the hole punched in the positive electrode shell.

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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