RC Lipo Battery Pack 7.4v 14.8V 4200mAh 25c 35c RC Drone Lithium-Ion Battery

Production steps:

Preparation of Electrode Materials

Mixing and Slurry Preparation: Active materials, binders, conductive agents, and solvents are mixed in a specific order and conditions to form a stable suspension. This slurry is crucial for the subsequent coating process.

Coating: The slurry is uniformly coated onto aluminum or copper foil, which serves as the current collector. The coated foil is then dried to remove the solvent, forming the positive and negative electrodes.

Electrode Processing

Rolling and Pressing: The coated and dried electrodes are pressed to increase their density and ensure good contact between the active material and the current collector.

Slitting: The electrodes are slit into the required width for subsequent assembly into the battery cell.

Tab Welding and Protection: Tabs are welded to the electrodes, and protective tape is applied to ensure insulation and prevent short circuits.

Cell Assembly

Stacking or Winding: Depending on the battery type (pouch, cylindrical, or prismatic), the electrodes and separators are either stacked or wound together to form the battery cell.

Stacking: Commonly used in pouch cells, where the electrodes and separators are alternately stacked.

Winding: Used in cylindrical and prismatic cells, where the electrodes and separators are wound around a mandrel.

Electrolyte Injection: Electrolyte is injected into the cell to facilitate the electrochemical reactions.

Sealing: The cell is then sealed to prevent leakage and contamination.

Formation and Testing

Formation: The cell undergoes its first charge and discharge cycle to activate it and form a stable solid electrolyte interphase (SEI) on the negative electrode.

Testing: The cell is tested for voltage, capacity, internal resistance, and safety performance to ensure it meets specifications.

Module Assembly (for Battery Packs)

Cell Sorting and Matching: Cells are sorted and matched based on their performance to ensure consistency within the battery pack.

Module Assembly: The sorted cells are assembled into modules, with insulation, welding, and connection processes to ensure stable and reliable performance.

BMS Integration: The Battery Management System (BMS) is integrated to monitor and manage the battery pack's state, ensuring safe and efficient operation.

Pack Assembly and Testing

Pack Assembly: The modules are assembled into the final battery pack, with additional protection, insulation, and connection processes.

Testing: The battery pack undergoes comprehensive testing, including capacity test, internal resistance test, cycle life test, and safety performance test, to ensure it meets the required specifications and performance standards.

Packaging and Shipping

Packaging: The battery pack is packaged to protect it during transportation and storage.

Shipping: The packaged battery pack is then shipped to the customer.

Pictures: