16400 3.7V Capacitor-Shaped LiPo Battery

Capacitor-Shaped LiPo Battery Structural Configuration

The capacitor-shaped LiPo battery (16400, 3.7 V specification) is designed by engineers in a compact cylindrical form, which incorporates layered electrochemical films into a tightly packed roll core. They start by stacking cathode-coated aluminum foil, anode-coated copper foil, and polymer separator sheets into a continuous laminated strip. Then they roll the multilayer structure into a controlled spiral shape and actively control tension and alignment to prevent edge displacement. Once the core has been formed, the technicians insert it into a rigid cylindrical metal housing and undertake dimensional stabilization before introducing the electrolyte.

Electrochemical Materials and Layer Engineering

Manufacturers make the cathode by coating aluminum current collectors with lithium transition-metal compounds, and the anode with graphite slurry on copper foil. In the meantime, they incorporate a microporous PP/PE separator to facilitate ion migration, but prevent electronic contact between electrodes. Concurrently, they develop a lithium salt electrolyte system in carbonate solvents, with great care taken in the impurity levels and exposure to moisture during formulation. The outer casing is as well made of high-strength alloy materials to ensure that the enclosure is stable under the internal chemical activity.

Electrode Processing and Spiral Assembly

Technicians start the process of electrode production by combining active powders, conductive agents and binders into a stable slurry mixture. They then spray the slurry onto metal foils using precision coating lines, and perform staged drying to eliminate volatile residues. The coated layers are then compressed with calendering equipment to obtain controlled density and uniform thickness. They then cut the electrodes into thin strips and feed them into automated winding systems. In this step, operators spot electrode tabs with ultrasonic or resistance welding and constantly check the alignment accuracy.

Formation Conditioning and Manufacturing Standards

Engineers carry out controlled formation cycling to energize electrochemical interfaces and stabilize internal film layers. Aging processes are then performed in controlled temperature conditions to monitor voltage drift and impedance change. Lastly, quality control teams perform dimensional checks, insulation resistance checks, and structural sealing checks. During the manufacturing process, IEC 62133 and UN38.3 standards are adhered to, and the standardization of structural control, electrical consistency, and validation of transport safety of capacitor-shaped LiPo battery manufacturing are ensured.

Product Features

1. Customizable

Can be customized according to customer needs.

2. High Power

Maximum discharge rate of 20C.

3. Long Cycle Life

Meets long-term product usage needs

4. High Safety

Has undergone extensive safety inspections.

5. True Rated Capacity

Equates the product design capacity.

6. Multi-Chemistry Options

Includes LCO, NCM, NCA and LFP systems.

7. Multi-Protection Mechanism

Inbuilt protection board against overcharge, overdischarge, overcurrent and short-circuit.

Product Application Areas

The product can be used on numerous portable and powered electronic devices and the common uses are:

• Personal Care & Health: Fitness Trackers, Electric Toothbrushes, Beauty Devices, Medical Devices.
• Smart Digital/Audio: Headphones, Speakers, Nebulizers, Toys, Lights.
• Financial Payment & Office: POS Machines, USB Tokens, Portable Printers