Analysis on the tabs of the soft pack lithium battery

The ears of the soft-pack lithium battery are amazing! Know the ears of the soft-pack lithium battery 1. What is a battery headset? Elysium is an integral part of the soft-pack lithium battery product. The battery is divided into a positive electrode and a negative electrode. The tabs are metal conductors that lead from the positive and negative electrodes of the battery. It is often said that the positive and negative electrodes of the battery are the contact points when the battery is charged and discharged. The positive electrode of the battery uses aluminum (Al) data, the negative electrode uses nickel (Ni) data, and the negative electrode also has copper-plated nickel (Ni-Cu) data. They are a compound composed of two parts, a thin film and a metal strip. 2. Classification of tabs 2.1 According to the material of tab metal belt: aluminum (Al) tabs: generally used as positive ears, if the battery is a lithium titanate negative electrode, it is also used as a negative ear. Nickel (Ni) tab: As a negative tab, it is mainly used for small digital batteries, such as mobile phone batteries, mobile power batteries, tablet computer batteries, and smart transmission equipment batteries. Copper-plated nickel (Ni-Cu) electrode ears: used as negative electrode ears, mainly used for power lithium-ion batteries and high-power batteries. 2.2 According to the magnetic pole lug (domestic market): vinyl lug: generally used for low-end digital small batteries. Yellow rubber rod ears: generally used for low-end power lithium-ion batteries and high-power batteries. White plastic ear rods: generally used for high-end digital batteries, power lithium-ion batteries and high-power batteries. 2.3 The packaging of polar ear products is divided into: (1) Disc type magnetic pole ear (the equipment after the whole metal belt and the coil after the whole film are formed into a disc), which is used in the automatic processing line. After forming a single piece, put it into a row with two thin transparent plastic film clamps in the middle), which is used for ordinary processing line. 3. The raw material of battery tab metal belt AL1050 aluminum alloy is formed by adding a small amount of copper to pure aluminum. It has good forming and production performance, high corrosion resistance, good weldability, and good electrical conductivity. TU1 is oxygen-free copper with extremely low oxygen impurity content, high purity, good electrical and thermal conductivity, good ductility, low permeability, no hydrogen disease or very little hydrogen disease; good production performance, welding, corrosion resistance, and cold resistance. 4. The structure and performance of various brands of lug glue 4.1. Various brands of lug glue structure. The current gole glue is imported from Japan, and the processing technology of gole glue is more difficult: the molecular weight of PP data is controlled within a relatively narrow range, and the domestic processing technology of PP glue can no longer meet Claim. Lug glue structure: Lug glue is generally composed of three layers of hot pressing together, except for embossed board and single-layer modified PP made by Zhaoan and five-layer lug glue made by Tensen. Generally speaking, the tab glue is composed of a central frame layer and two outer modified polypropylene layers. The two externally modified PP materials are the same. In order to seek the ultra-high adhesion strength between the adhesive layer and the metal belt, Hitachi and tengsen have two modified PP materials with different appearances, one is the property modification page for gold, and the other is the pro-plastic appearance modification page. This kind of lug glue, once the lug glue is used to make the lug, it will definitely cause the leakage of gas expansion liquid. Currently in the domestic market, the lug glue used to make lugs can be divided into white glue, black glue, yellow glue and single-layer glue. Among them, most high-end battery customers choose single-layer relief 80m and 50m white glue. Low-end customers generally choose DNP vinyl and DNP yellow glue. There are many choices of white glue with three-layer structure in Japan and Korea. Single-layer white glue is rarely used in battery companies in Japan and South Korea, and three-layer white glue is basically used. Domestic high-end battery companies are also gradually choosing white glue with a three-layer structure. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Analysis of important components of lithium battery electrolyte