Lithium-ion battery structure design method

Abstract

The invention provides a lithium-ion battery structure design method. The novel lithium-ion battery structure design aims at finding a battery reaction structure in which a film and electrolyte solution (or solid electrolyte) are used as the catalysts for the reaction between positive and negative electrodes. The structure design has the advantage that the design idea that the positive and negative electrode materials of the traditional lithium-ion battery can react with each other directly and the film and the electrolyte solution (or solid electrolyte) are used as lithium ion transport mediais overturned. Two materials which do not react with each other directly after contact are used as positive and negative electrodes respectively, and a film and electrolyte solution (or solid electrolyte) are used as the catalysts for the reaction between the positive and negative electrodes, which fundamentally solves the internal short circuit problem caused by a series of reasons such as filmbreakage. Thus, the safety of lithium-ion batteries is improved. The method is novel in design, can easily realize mass industrial production, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of structural design, and in particular relates to a novel lithium-ion battery structural design method, which is applied in the field of lithium-ion batteries. [0002] technical background [0003] Lithium-ion batteries have the advantages of high energy density, large output power, high voltage, small self-discharge, wide operating temperature range, no memory effect, and environmental friendliness. They have been widely used in electronic equipment, electric vehicles, rail transit, and large-scale energy storage. and aerospace fields. [0004] The traditional lithium battery structure is generally arranged in a layered arrangement of "positive electrode / diaphragm / negative electrode", accompanied by an electrolyte that permeates the entire battery system. Although the electrolyte often contains other additives such as flame retardants and stabilizers, its main function is to transport lithium ions. That is to say,...

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Problems solved by technology

[0005] However, due to the nature of the diaphragm and electrolyte itself, or some external factors, it is easy to cause problems such as diaphragm damage or liquid leakage in lithium batteries. At this time, once the positive and negative electrode materials are in direct contact, an internal short circuit will occur, resulting in local overheating of the batter

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