731935 High Power 3.7V LiPo Cell

A high-power 3.7V LiPo cell is based on a single pouch-cell architecture that is tailored to high-discharge behavior and has a nominal voltage of 3.7V and a regulated full-charge value of 4.2V. In the meantime, the 320mAh design is created by means of a tightly regulated stacking of electrodes and electrolyte dosing, which guarantees uniform electrochemical response under quick load changes. Moreover, engineers tune internal impedance to allow the cell to maintain a constant 3A discharge profile under specified conditions.

Materials System and Electrode Composition

Manufacturers build the internal structure with layered lithium cobalt-based cathode coating coupled with graphite anodes, and copper and aluminum foils serve as current collectors to facilitate efficient transfer of electrons. Moreover, a microporous polymer separator is placed between electrodes to avoid direct contact and minimize the risk of internal short-circuit. Meanwhile, the chemistry is contained in the aluminum-plastic laminated pouch, which is structurally flexible to changes in pressure.

Cell Assembly and Welding Process

The first sorting is done by technicians on cells by impedance and capacity matching to minimize imbalance within the production batch. Precision spot welding is then used to connect nickel tabs, and this helps in maintaining consistent current paths and minimizing localized heat stress. Subsequently, an integrated protection circuit module (PCM/BMS) is added to control overcharge, overdischarge, and overcurrent behavior. In the meantime, insulated lead wires are attached and strain-relieved to ensure continuity of electricity when the wires move.

Encapsulation and Structural Finishing

After internal assembly, the pouch cell is closed with controlled heat-lamination that fixes the electrolyte composition and prevents the ingress of moisture. Also, external insulation coats are used to enhance mechanical stability and dimensional consistency. Then pressure retention and insulation resistance tests are conducted to confirm the integrity of the sealing, and then final packaging is done.

Standards and Electrical Control Procedures

Production is usually done in accordance with international safety and transport standards like UN38.3, CE, and RoHS compliance standards. Further, the charging is controlled by constant-current/ constant-voltage (CC/CV) approach that restricts the highest cell voltage to 4.2 V and stabilizes the lithium-ion intercalation. Lastly, controlled temperature cycle testing assesses long-term electrochemical stability and confirms discharge stability at high currents.

Product Features

• Customization Supported: Can be customized based on customer requirements.
• High Power: Discharge up to 20C.
• Fast Charging: Up to 3C charging
• Long Lifespan: Meets the criteria for long-term product usage.
• Multi-Material System: Includes LCO, NCM, NCA, LFP, and other material systems.
• High Safety: Passes safety performance tests.
• Adequate Capacity: Adequate product design capacity.
• High Temperature Resistance: Operating temperature range -20℃ ~ 80℃

Application Scenarios

• Electronic Atomizers
• Voice Recorders
• Headphones
• Beauty Devices