Oct. 09, 2025
What do you do when your alarm clock runs out of battery? Simple: replace the old battery with a new one of the same model. Batteries are common energy storage devices used in many electronic products, with different sizes for different applications. For example, AA batteries power kitchen appliances, while AAA batteries are used in remotes and toys.
In addition to batteries, there’s another type of energy storage device that looks similar to a battery but is not: the supercapacitor.
Supercapacitors, also known as electrochemical capacitors, are energy storage devices that sit between traditional capacitors and batteries. They store energy through an electric field, forming a double-layer structure between the electrodes and the electrolyte to store charge.
Just like batteries, supercapacitors come in various sizes and shapes, such as cylindrical, button, and rectangular forms. These different sizes and shapes are designed to meet various application needs and performance requirements.
Large-capacity supercapacitors are ideal for applications requiring high energy density or long-duration power, such as backup power supplies, grid frequency regulation, and electric vehicles that require supercapacitors to provide energy over extended periods.
Small-capacity supercapacitors are suitable for low-power, compact devices like Bluetooth headphones, smartwatches, and sensors.
Types of Supercapacitors:
1. Cylindrical Supercapacitors
Cylindrical supercapacitors have a compact internal structure, minimizing internal resistance. They are suitable for high-power output applications, such as industrial equipment, electric vehicle starting systems, and backup power for wind turbines.
2. Button-Style Supercapacitors
Button-style supercapacitors are small and compact, making them ideal for applications that demand minimal space and low power consumption, such as smart card backup power, and temperature and humidity sensors.
3. Rectangular Supercapacitors
Rectangular supercapacitors resemble small blocks or boxes, with good heat dissipation properties. These are commonly used in high-voltage or high-power applications, such as industrial equipment, electric vehicles, and energy storage systems.
Different sizes and shapes of supercapacitors serve distinct application needs, so it's essential to choose the right one for the task at hand.
This article is provided by JYH HSU (JEC) Electronics. JEC is a research, development, production, and sales-oriented company specializing in manufacturing and selling various electronic components such as capacitors and resistors.
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