501740 3.7V Li-Polymer Battery

501740 Li-Polymer Battery Structural Overview

The 503450 3.7 V LiPo energy storage battery is built by engineers on a flat pouch-cell architecture with extremely tight dimensional tolerances. First, they align the stack of electrodes in a layered arrangement, with uniform spacing throughout the cell surface. Subsequently, technicians place the cathode, separator, and anode in a consistent order to ensure internal consistency. In the meantime, insulation films are laid along edge areas to alleviate stress concentration during sealing. The structure is stacked and then passes into lamination and pouch-forming processes. (Typical 503450 format: approx. 34×50×5 mm class).

Electrode Materials and Internal Composition

The cathode is constructed by manufacturers with lithium metal oxide that is coated on aluminum foil, and the anode is constructed with carbon material that is made of graphite and is coated on copper foil. Moreover, a microporous polymer separator is introduced between the layers of electrodes to allow the movement of lithium ions but not direct electrical contact. Moreover, the electrolyte is lithium salts dissolved in organic carbonate solvents, and great care is taken to keep the moisture levels low during filling and sealing. In the meantime, the laminated film of aluminum and plastic is used as the outer cover, instead of the rigid casing, a flexible sealed structure.

Manufacturing and Layer Processing

Technicians start with the active materials, conductive additives, and polymer binders in a homogeneous slurry. The slurry is then sprayed onto metal foils by automated coating machines with an accuracy of controlled thickness. Calendaring rollers are used after drying to compress the electrodes to stabilize density and surface uniformity. The electrodes are then sliced to the exact size of the 503450 geometry and arranged in layered sequences. In the meantime, alignment systems constantly check the accuracy of stacking prior to sealing.

Formation Testing and Compliance Standards

Initial charge-discharge cycling is performed by the engineers to initiate electrochemical stability and internal interface balancing. Then, aging tests are used to test drift in voltage consistency and internal resistance over time. Lastly, inspection, electrical verification, and safety testing are performed. During the production, the 3.7 V LiPo energy storage battery is in accordance with IEC 62133 and UN38.3, which guarantee structural integrity, electrical safety, and transportability.

Sample making, processing, and customization are available

Product Features

1. Flexible Customization

Helps in the addition of wires, protection PCBs, terminal connectors, and other customizations according to customer needs.

2. High Power

Maximum discharge rate of 20C.

3. Long Cycle Life

Satisfies long-term product use requirements.

4. High Safety

Safety tests completed.

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, overdischarge, overcurrent, and short-circuit protection board.

Application Scenarios

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

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