13200 3.7V Rechargeable Li-ion Battery

Rechargeable Li-ion Battery Cell Structure Overview

The rechargeable Li-ion battery outlined in the 13200 3.7V lithium capacitor-style format is designed by engineers by incorporating a small electrode stack into a sealed cylindrical housing. They begin by placing cathode and anode foils, with a microporous separator between the foils, and then they roll up the layered structure in a tightly controlled spiral core. In the meantime, they place the rolled assembly into a hard metal housing, and they ensure internal alignment before the processing of the electrolytes commences. Then, technicians fix the internal structure to avoid its displacement during further sealing processes.

Material System and Electrochemical Components

The lithium metal oxide compounds are coated by manufacturers on aluminum foil to create the cathode layer, and the graphite-based slurry is applied on copper foil to create the anode layer. Moreover, they add PE/PP multilayer separator to ensure ionic conduction but avoid direct contact with electrodes. In addition, they make organic carbonate electrolyte with lithium salts like LiPF6, and they control the amount of moisture to ensure chemical stability. In the meantime, the cylindrical shell is made of aluminum alloy or steel to give it mechanical rigidity and pressure resistance.

Electrode Assembly and Winding Process

Technicians slice coated electrodes into fine strips and insert them into automated winding machines to create a uniform jelly-roll structure. They then manage the winding tension to prevent deformation and internal stress build-up. Then they roll the core and place it into the cylindrical casing and attach electrode tabs to the terminal structure. They then do laser welding or resistance welding to fix electrical connections. In the meantime, they check the positional accuracy to make sure that the cell is uniformly layered.

Formation Cycling and Industrial Standards Control

To trigger electrochemical reactions and stabilize the solid electrochemical interphase layer inside the cell, engineers start formation cycling. They then test aging under controlled temperature conditions to test voltage stability and impedance behavior. Lastly, quality teams conduct dimensional check, internal resistance check and sealing check. During production, they adhere to the IEC 62133 and UN38.3 standards, and they certify the mechanical integrity, electrical consistency, and transport safety of rechargeable Li-ion battery production.

Product Features

1. Customizable

Customizable to meet customer requirements

2. High Power

Max. 20C discharge rate on board.

3. Long Cycle Life

Satisfies the long-term product use requirements.

4. High Safety

Successful overall safety examinations..

5. True Rated Capacity

Equates the product design capacity.

6. Multi-Chemistry Options

Includes LCO, NCM, NCA and LFP systems.

7. Multi-Protection Mechanism

In-built overcharge, over discharge, over current and short-circuit protection board.

Product Application Areas

The product can be used in a range of portable and powered electronic devices and the common uses are:

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