Aluminum electrode foil is a key material required for the manufacture of aluminum electrolytic capacitors. It is a material specifically used to make the positive and negative electrodes of aluminum electrolytic capacitors. It is mainly used to store charge and is called the "aluminum electrolytic capacitor CPU".
Electrode foil is made of plain aluminum foil as the main raw material and is formed through a series of processing steps such as corrosion and formation. Together with the electrolyte, it accounts for 30%-60% of the production cost of aluminum electrolytic capacitors (depending on the size of the capacitor).
According to the application fields of electrode foil, traditional fields (consumer/industrial) account for 75% of the demand and are the key to the stable growth of demand for aluminum electrolytic capacitors. Downstream aluminum electrolytic capacitors are irreplaceable in consumer electronics products, so the steady development of the consumer electronics industry can ensure the stable growth of demand for electrode foil.
Emerging fields are expected to boost the reversal of electrode foil demand. Emerging fields (new energy vehicles, charging piles, new energy power generation, 5G, big data centers, etc.) will have a relatively fast compound growth rate in the future and will become the main driving force for the growth of electrode foil demand in the future.
For example, new energy vehicles are one of the important application scenarios of aluminum electrolytic capacitors. It is expected that global new energy vehicles will maintain an annual compound growth rate of about 30% in the future. At present, the ratio of cars to charging piles is still low. The popularization of new energy vehicles will drive the demand for charging piles to grow synchronously or even accelerate, driving the demand for electrode foil to rise rapidly.
Another example is the increase in demand brought by 5G base stations. Due to the higher frequency of 5G, the number of base stations may be 2-3 times that of 4G, and communication equipment such as program-controlled switches, servers, routers, and base stations all use a large number of aluminum electrolytic capacitors. The acceleration of 5G construction is expected to accelerate the growth of electrode foil demand.
Electronic aluminum foil process
Electronic aluminum foil is a high-purity aluminum foil, which is made of refined aluminum (high-purity aluminum) ingots through hot rolling into aluminum sheets, and then further cold rolling and annealing. The specific production process of electronic aluminum foil includes: melting-heating-hot rolling-pre-annealing-cold rolling-intermediate annealing-cold rolling-foil rolling-slitting-performance testing-packaging.
The rolling process mainly refers to the hot rolling and foil cold rolling processing links.
Hot rolling: The hot rolling process should focus on the quality control of the rollers, emulsions and guide rollers. It is best for hot rolling mills to be equipped with roll cleaning devices or to develop regular roll cleaning processes. Ensure the lubrication, cooling performance and cleanliness of the emulsion.
Foil cold rolling: Foil cold rolling plays a key role in controlling the flatness, thickness deviation, and surface color uniformity of the final aluminum electrode foil. The negative electrode aluminum foil requires a thickness deviation of less than 5%, a flatness of no more than 20I, and a uniform color without stripes before and after corrosion.
These requirements are mainly met by the cold processing process, so the configuration requirements for the hardware of the production process are relatively high. Generally speaking, the cold rolling mill is required to be equipped with a thickness and plate shape automatic control (AGC and AFC) system. Welcome to buy aluminium foil from us.