What causes the leakage of cylindrical lithium-ion batteries

As we all know, cylindrical lithium-ion battery is a relatively safe and stable battery form, and the manufacturing process has become more exquisite after long-term accumulation. Compared with other shapes of lithium batteries, the safety performance of cylindrical lithium-ion batteries is excellent, but why Cylindrical lithium batteries will still leak, so what causes the leakage of cylindrical lithium-ion batteries? Next, I will explain in detail the reasons for the leakage of lithium-ion batteries on the comprehensive lithium battery production process; objectively speaking, the lithium-ion battery production process is divided into three sections, one is pole piece production, and the other is battery cell. Production, the third is battery assembly. In the production process of lithium-ion batteries, the production of pole pieces is the foundation and the production of batteries is the core. Battery assembly is related to the quality of the finished lithium-ion battery. The specific steps of the lithium-ion battery production process flow include positive electrode slurry drawing, negative electrode slurry drawing, positive electrode sheet, negative electrode sheet, steel shell assembly, liquid injection and testing, and packaging. As we all know, the production process of lithium-ion batteries is quite complicated. After all, the safety performance of lithium-ion battery products is directly related to the life and health of consumers. Natural lithium-ion battery production has a high level of equipment performance, accuracy, stability and automation. Requirements. Take the preparation of electrode slurry in the lithium-ion battery production process as an example. This link is the foremost link in time and the most important link in the entire production process. After all, the electrode slurry mixing and dispersion process has a greater impact on product quality than 30%. The reason? The reason is that the preparation of positive and negative electrode slurry of lithium-ion batteries includes a series of processes such as mixing, dissolving, and dispersing between liquid and liquid, and between liquid and solid materials, and is accompanied by temperature, viscosity, environment, etc. Variety. In the positive and negative electrode slurry, the dispersion and uniformity of the granular active material directly affects the movement of lithium ions between the battery poles, so the dispersion quality of the electrode slurry directly affects the product performance of the lithium ion battery. The main reasons for the leakage of cylindrical lithium-ion batteries are: excessive internal pressure and unqualified external packaging. 1. In the process of battery manufacturing, if the following problems occur, it is easy to cause battery leakage: 1. When welding the battery shell and cap, the welding is not strong, not sealed, there are leaks, virtual welding, and the weld has cracks and cracks. Problems 2. When the steel ball is sealed, the size of the steel ball is not appropriate, and the material of the steel ball is not the same as the material of the cap 3. The positive riveting of the cap is not tight, there is a gap, and the elasticity of the insulating gasket is not appropriate, it is not corrosion resistant, and easy to aging. Problems that may occur during use: 1. The battery is not original, the voltage is too high or the current is too large. 2. The battery is often bumped during normal use, damaging the aluminum-plastic film, and the internal strength of the battery is not enough. Statement: Published on this site Some pictures and content of the article are from the Internet, if there is any infringement, please contact to delete the previous article: 2020 China Power Tool Lithium Battery Review and Forecast