The Effect of Temperature Changes on Supercapacitors

Capacitors are indispensable electronic components in electronic products. There are many types of capacitors: the commonly seen capacitors are safety capacitors, super capacitors, film capacitors, electrolytic capacitors, etc., which are used in consumer electronics, home appliances, industry and other industries. With the development of science and technology, there is continuous innovation in electronic products, and continuous upgrading in capacitors.

Supercapacitor is a new type of passive energy storage element, also known as electric double-layer capacitor and farad capacitor. It is an electrochemical element that stores energy through polarized electrolyte. It is between traditional capacitors and batteries. Since chemical reaction occurs during the charge and discharge process, the supercapacitor energy storage process is reversible, the supercapacitor can be repeatedly charged and discharged hundreds of thousands of times and can be used for a long time.

But supercapacitors will be affected by many factors when working, such as operating temperature, voltage, etc. So what effect will the operating temperature of the supercapacitor have on the supercapacitor?

The operating temperature range of supercapacitors is -40°C to +70°C, while the operating temperature range of commercial supercapacitors can reach -40°C to +80°C. When the temperature is lower than the normal temperature range of the supercapacitor, the performance of the supercapacitor is greatly reduced. At low temperature, the diffusion of electrolyte ions is hindered, resulting in a sharp decline in the electrochemical performance of supercapacitors, which greatly reduces the working time of supercapacitors.

When the temperature increases by 5°C, the working time of the capacitor decreases by 10%. At high temperature, the chemical reaction of the supercapacitor will be catalyzed, the chemical reaction rate will be accelerated, and its capacitance will be attenuated, which will reduce the efficiency of the supercapacitor, and a large amount of heat will be generated inside the supercapacitor during operation. When the temperature is too high and the heat cannot be dissipated, the supercapacitor will explode, endangering the circuit that uses the supercapacitor.

Therefore, in order to ensure the normal use of supercapacitors, it is necessary to ensure that the operating temperature range of supercapacitors is -40°C to +70°C.

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Post time: Aug-01-2022