731935 High Power 3.7V LiPo Cell

A high power 3.7V LiPo cell follows a single pouch-cell architecture designed for elevated discharge behavior, and it maintains a nominal voltage of 3.7V with a regulated full-charge limit of 4.2V. Meanwhile, the 320mAh configuration is formed through tightly controlled electrode stacking and electrolyte dosing, which ensures consistent electrochemical response during rapid load transitions. In addition, engineers calibrate internal impedance so the cell can sustain a stable 3A discharge profile under defined conditions.

Materials System and Electrode Composition

Manufacturers construct the internal structure using layered lithium cobalt-based cathode coatings paired with graphite anodes, while copper and aluminum foils act as current collectors to support efficient electron transfer. Furthermore, a microporous polymer separator is inserted between electrodes to prevent direct contact and reduce internal short-circuit risk. At the same time, the aluminum-plastic laminated pouch encloses the chemistry and maintains structural flexibility during pressure variation.

Cell Assembly and Welding Process

Technicians first sort cells by impedance and capacity matching to reduce imbalance within the production batch. Next, precision spot welding connects nickel tabs, and this process ensures stable current pathways while limiting localized heat stress. After that, an integrated protection circuit module (PCM/BMS) is attached to regulate over-charge, over-discharge, and over-current behavior. Meanwhile, insulated lead wires are fixed and strain-relieved to maintain electrical continuity during mechanical movement.

Encapsulation and Structural Finishing

Once internal assembly is completed, the pouch cell is sealed using controlled heat-lamination, which locks in electrolyte composition and prevents moisture ingress. Additionally, outer insulation layers are applied to reinforce mechanical stability and maintain dimensional consistency. Subsequently, pressure retention and insulation resistance tests are performed to verify sealing integrity before final packaging.

Standards and Electrical Control Procedures

Production typically follows international safety and transport regulations such as UN38.3, CE, and RoHS compliance frameworks. Moreover, charging is managed through a constant-current/constant-voltage (CC/CV) method, which limits the maximum cell voltage to 4.2V while stabilizing lithium-ion intercalation. Finally, cycle testing under controlled temperature conditions evaluates long-term electrochemical stability and verifies discharge consistency at high current levels.

Product Features

• Customization Supported: Can be customized according to customer needs
• High Power: Up to 20C discharge
• Fast Charging: Up to 3C charging
• Long Lifespan: Meets the requirements for long-term product use
• Multi-Material System: Covers LCO, NCM, NCA, LFP, and other material systems
• High Safety: Passes safety performance tests
• Sufficient Capacity: Meets product design capacity requirements
• High Temperature Resistance: Operating temperature range -20℃ ~ 80℃

Application Scenarios

• Electronic Atomizers
• Voice Recorders
• Headphones
• Beauty Devices