Preliminary Soldering before Housing The good battery core is loaded into the aluminum shell, and spot welding is for the subsequent sealing welding of the top cover and the shell. The top cover and the shell are pre-welded and fixed to prevent the dislocation of the top cover from affecting the quality of the battery. Main control points The shell…
Package Mylar Wrap Mylar film around the bare core and the bottom of the bare core. Mylar film is mainly used to prevent the core from contacting with the shell and prevent the occurrence of short circuit. Requirements 1. The incoming material of the battery core is smooth and aligned;2. Mylar film smooth, no static electricity;3. Hot melt temperature to…
The connecting piece is welded to the top cover The copper/aluminum soft connection is welded to the inner surface of the pole column corresponding to the top cover by continuous laser, and the weld mark needs to be protected by adhesive.Equipment: single fiber + galvanometer laser welder sequencePurpose: the core and the top cover welding connection.Key quality control points of…
Polar ear ultrasonic welding The positive and negative dispersed lugs are welded together into a piece, and the lugs need to be cut after the welding is completed.Ultrasonic welding is a solid phase welding method, the welding between the welding parts through the acoustic high-frequency vibration and the static pressure between the workpiece to form the heat energy.The welding quality…
Hot pressing process The thickness of bare battery is controlled by setting reasonable time, temperature and pressure. Hot pressing purpose Make the loose naked battery shape fixed after winding to prevent the relative displacement of the positive and negative electrode pieces;Improve the flatness of the core, so that the thickness of the core meets the requirements and has high consistency;Eliminate…
Assembly flow process Preheating Preheating the component in preparation for subsequent hot pressing steps. The use of baking technology, baking and then heat pressure, increase the compaction effect. Hot Pressing The preheated component is hot pressed to form the desired shape or connection. X-ray Inspection The equipment uses X-ray to transmit the inside of the product, and images it, and…
Process of winding After laser cutting the pole piece, through the rotation of the needle, the pole piece is rolled into a layer on layer covering the core shape, the normal way of covering the diaphragm, positive electrode, diaphragm, negative electrode. Generally, there are round and oval needles. Theoretically, the rounder the needle is, the better the coil core fits,…
The process flow of vertical section of lithium ion battery pack Lithium-ion batteries are widely used in portable electronic devices, electric vehicles, and energy storage systems due to their high energy density, long cycle life, and low self-discharge rate. The assembly segment process is a key link in lithium-ion battery manufacturing, which mainly includes four steps: winding, assembly, cell baking…
Laser cutting process Laser cutting is a high precision, high efficiency processing technology, it plays a crucial role in the wafer manufacturing. This process uses a laser beam of high power density to illuminate the material, so that the material quickly melts, vaporizes or reaches the ignition point, so as to achieve cutting. The characteristics of laser cutting include fast…
Die punching process Process flow The die punching process mainly includes the following steps:Material preparation: Select suitable materials, such as metal or non-metal materials, cut and pretreatment according to product requirements.Mold design: According to the product shape and size requirements, design punching mold. Mold design needs to consider material characteristics, punching force, mold life and other factors.Punching processing: the material…