304050 Thin Lithium Polymer Battery

Thin Lithium Polymer Battery Structural Overview

The 304050 thin lithium polymer battery is built by engineers based on an ultra-flat pouch cell architecture. To begin with, they stack the layers of electrodes in a stacked arrangement, such as cathode foil, separator film, and anode foil. They then laminate these layers into a sheet format with tight control to make a slim geometric profile. In the meantime, technicians are attentive to aligning every layer to avoid edge offset and internal stress concentration when sealing. Once stacked, the cell is then transferred into a heat-sealing process to create a flexible pouch structure.

Electrode Material System and Internal Chemistry

The cathode is constructed by manufacturers through lithium metal oxide coating on aluminum foil, and the anode is constructed through carbon material composed of graphite on copper foil. Moreover, a microporous polymer separator is placed between electrodes to ensure that lithium ions move but do not make electrical contact. Moreover, the electrolyte is composed of lithium salt dissolved in organic carbonate solvents, and moisture is highly controlled during mixing and injection procedures. Meanwhile, the aluminum-plastic laminated film serves as the outer shell, providing both sealing and flexibility instead of a rigid metal casing.

Cell Fabrication and Lamination Process

Technicians begin by making electrode slurries by mixing active substances, conductive agents, and polymer binders into a homogeneous paste. They then apply the slurry to metal foils with precision coating equipment. Calendaring rollers are used to compress the electrodes after drying to produce uniform thickness and density. The electrodes are then cut into thin strips and arranged in a layered arrangement. In the meantime, automated alignment systems guarantee the same stacking order to prevent internal misplacement.

Formation Testing and Safety Standards

Initial charge-discharge cycling is done by engineers to activate electrochemical interfaces and stabilize internal structure. Subsequently, aging tests are conducted to determine the stability of voltages and internal resistance over time. Lastly, insulation testing, verification of sealing, and dimensional inspection are done. During manufacturing, the thin lithium polymer battery is in line with IEC 62133 and UN38.3 requirements, which guarantee structural integrity, electrical safety, and transportation.

Product Features

1. Large Capacity and Constant Production

True capacity of 600mAh and low self-discharge guarantee constant and consistent power.

2. Multi-Protection Safety Design

Built-in safeguards to prevent overcharge, over-discharge, over-current, and short circuits.

3. Ultra-Thin & Space-Saving

Slim 3mm thickness is used in small devices where space is a constraint.

4. Flexible Customization

Helps add wires, PCBs, and connectors to fit particular needs.

5. Long Cycle Life

Achieved by operating in a stable manner after being subjected to repeated charge and discharge.

6. Wide Application Range

Appropriate for a range of portable and small-sized electronic devices.

7. Factory Direct Supply

Tight quality control, quick sample service, and OEM.

Product Application Areas

Best for portable and everyday use electronics that need safety, long cycle life, and small size.

• Personal Care: Sports bracelets, Medical devices, Electric toothbrushes.
• Audio & Entertainment: Headphones, Speakers, Toys.
• Daily Electronics: LED lights, General electronic products.