What is a film capacitor? What are the Differences between Capacitors and Batteries?

Film capacitors are capacitors that use metal foil as electrodes, overlap it with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate, and then roll it into a cylindrical structure. Depending on the type of plastic film, they are called polyethylene capacitors (also known as Mylar capacitors), polypropylene capacitors (also known as PP capacitors), polystyrene capacitors (also known as PS capacitors) and polycarbonate capacitors.

Differences between capacitors and batteries

Capacitors are different from batteries. They do not undergo chemical reactions during charging and discharging. The storage or release of electrical energy is accomplished through a physical process established by an electrostatic field. The electrodes hardly age, so they have a long service life and can achieve fast charging and fast high-current discharge.

Applications

Film capacitors are mainly used in electronics, home appliances, communications, electricity, electrified railways, hybrid vehicles, wind power generation, solar power generation and other industries. The stable development of these industries has driven the growth of the film capacitor market. With the development of technology, the replacement cycle of electronics, home appliances, communications and other industries is getting shorter and shorter, and film capacitors have become an indispensable electronic component to promote the replacement of the above industries with their good electrical performance and high reliability. In the next few years, with the further development of digitalization, informatization and networking, and the country's increased investment in power grid construction, electrified railway construction, energy-saving lighting, hybrid vehicles, and the upgrading of consumer electronic products, the market demand for film capacitors will further show a rapid growth trend.

Advantages:

1. Stability: Film capacitors generally have good temperature stability and frequency response, which enables them to maintain stable performance under different environmental conditions.

2. Precision: Due to the precision of the manufacturing process, film capacitors generally have high capacitance value accuracy and are suitable for applications that require precise capacitance values.

3. Low leakage current: Film capacitors generally have low leakage current, which is very important for some applications, especially when the charge needs to be maintained for a long time.

4. Voltage resistance: Film capacitors generally have good voltage resistance and can operate at higher voltages without damage.

5. Small size: Compared with other types of capacitors, film capacitors generally have smaller size and weight, which is suitable for applications that require high performance but limited space.

6. Long life: Film capacitors generally have a long service life and can maintain stable performance for a long time.

7. Anti-interference ability: Film capacitors have good anti-interference ability in the circuit and can effectively filter out stray signals and noise.

8. Environmental protection: Some film capacitors are made of environmentally friendly materials and meet environmental protection requirements.

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Country: China
Website: https://www.crccapacitor.com/