Li Polymer Battery Production Process
Lipo batteries, also known as lithium polymer, lithium-ion polymer
batteries, are a type of rechargeable battery that uses a polymer
electrolyte instead of a liquid one. The production process of
polymer batteries involves several key steps:
1. Material Preparation: The first step in producing a lithium polymer battery is to
prepare the necessary materials, including the polymer electrolyte,
lithium-ion cathode material, graphite anode material, and other
components like current collectors and separators.
2. Cathode and Anode Preparation: The cathode and anode materials are coated onto current
collectors, which are thin sheets of metal foil that facilitate the
flow of electric current within the battery. The coating process
involves applying a slurry containing the active material, binders,
and solvents onto the current collector using techniques like
doctor blade coating or slot die coating.
3. Drying and Pressing: After coating, the cathode and anode films are dried to remove any
remaining solvents and then pressed to increase their density and
improve adhesion to the current collector.
4. Separator Coating: A separator, typically made of a porous polymer film, is coated
with the polymer electrolyte solution. This separator acts as an
insulator between the cathode and anode while allowing lithium ions
to pass through during charging and discharging.
5. Assembly: The cathode, separator, and anode layers are stacked together,
usually with the cathode on top and the anode on the bottom. This
stack is then wrapped in a protective outer layer, such as aluminum
foil, to prevent damage and maintain the battery's structural
integrity.
6. Injection Molding: The wrapped battery stack is placed into a mold and injected with
molten polymer material. The Li-polymer solidifies around the
battery stack, forming a protective case that also serves as part
of the battery's structure.
7. Formation and Aging: The newly assembled polymer battery undergoes a formation process,
which involves charging and discharging the battery several times
to activate the electrodes and stabilize the electrolyte. After
formation, the battery is aged for a period of time to ensure its
performance and safety characteristics are consistent.
8. Testing and Quality Control: The final step in the production process is to test the Li-pol
battery for capacity, voltage, impedance, and other critical
parameters. Any batteries that do not meet the specified quality
standards are removed, ensuring that only reliable and
high-performing batteries are sold to consumers.
Parameter of 405085 lithium polymer battery pack
Battery Type | Lithium polymer rechargeable battery |
Model | |
Nominal Voltage | 3.7V |
Nominal Capacity | 1800mAh |
Dimensions | 4(T)*50(W)*80/85(L)mm |
Approx Weight | 36g |
Charge Info | Cut-off Voltage: 4.20V±0.05V |
Standard Charge Current: 360mA(0.2C),Max Charge Current: 900mA(0.5C) |
Discharge Info | Discharge Cut-off Voltage: 3.0V |
Standard Discharge Current: 360mA(0.2C), Max Constant Discharge Current: 1800mA(1C) |
Operating Temperature | Standard Charge: 0~+45℃,Standard Discharge: -20~+60℃ |
Appearance/connection | Any wires length, connector P/N, or with PVC, label, battery packs
are available |
Certifications | CE, ROHS, UN38.3, MSDS |
Payment Terms | TT/Paypal/Western Union |
