15330 3.7V Compact Cylindrical LiPo Battery

Compact Cylindrical LiPo Battery Internal Structure

Engineers design the compact cylindrical LiPo battery (15330 class, 3.7V nominal) using a tightly rolled electrode architecture inside a sealed metal cylinder. First, they laminate cathode foil, anode foil, and separator film into a continuous strip, and they wind the assembly into a dense spiral core under controlled tension. Meanwhile, they maintain strict alignment during winding to reduce internal stress distribution. After that, technicians insert the finished jelly-roll core into a precision-machined cylindrical housing and stabilize its position before electrolyte filling begins.

Material System and Electrochemical Composition

Manufacturers coat lithium transition-metal oxide materials onto aluminum foil to form the cathode layer, while they apply graphite-based slurry onto copper foil to construct the anode layer. In addition, they introduce a PP/PE microporous separator to support ion migration and prevent internal short circuits. Furthermore, they prepare an organic carbonate electrolyte containing lithium salts such as LiPF6, and they regulate moisture content carefully to maintain chemical stability. Meanwhile, the cylindrical casing uses steel or aluminum alloy material to ensure structural integrity and pressure resistance.

Electrode Fabrication and Winding Operation

Technicians begin slurry preparation by mixing active powders, conductive additives, and polymer binders into a uniform suspension. Then, they coat the slurry onto metal foils using precision coating machines and dry the electrodes in staged thermal ovens. Subsequently, they apply calendaring pressure to control electrode density and thickness consistency. After cutting the foils into narrow strips, they feed them into automated winding equipment to form a compact spiral structure. At the same time, they weld electrode tabs using ultrasonic or resistance methods to ensure stable electrical connection.

Formation Cycling and Industrial Standards Control

Engineers initiate formation cycling to activate electrochemical reactions and stabilize the solid electrolyte interphase layer within the cell. Then, they conduct aging tests under regulated temperature environments to evaluate voltage stability and impedance behavior. Finally, quality teams perform dimensional inspection, internal resistance measurement, and sealing verification. Throughout production, manufacturers comply with IEC 62133 and UN38.3 standards, ensuring structural consistency, electrical reliability, and transport safety compliance for compact cylindrical LiPo battery manufacturing.

Caractéristiques du produit

1. 🛠️ Personnalisable
   Personnalisable pour répondre aux besoins des clients
2. ⚡ Puissance élevée
   Débit maximal de 20°C disponible
3. ⏱️ Durée de vie longue
   Répond aux besoins d’utilisation à long terme des produits
4. 🛡️ Sécurité élevée
   A réussi des tests de sécurité complets
5. 🔋 Capacité réelle nominale
   Correspond à la capacité de conception du produit
6. ⚛️ Options multi-chimique
   Couvre les systèmes LCO, NCM, NCA et LFP
7. 🧰 Mécanisme de protection multiple
   Carte de protection intégrée avec protection contre la surcharge, la surcharge, la surcharge et les courts-circuits

Domaines d’application des produits

Ce produit convient à une variété d’appareils électroniques portables et électriques, avec des applications typiques telles que :

• Personal Care: Electric toothbrush
• Audio & Entertainment: Headphones, Speakers, Toys
• Medical & Health: Medical devices, Sports bracelet
• Office & Digital: POS terminals, Lights