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Portable Power Station Parameters 9: Self-discharge


This blog is about the Self-discharge of portable power stations.

This parameter defines the reduction in energy capacity of the battery under no-load conditions (e.g., open circuit), as a result of internal short-circuits and chemical reactions. This parameter can be affected by environmental conditions such as temperature and humidity, as well as the DoD and the battery’s charge/discharge history. Additionally, this parameter is particularly important for the long-term shelf storage of batteries.

What causes self-discharge?
A minuscule amount of the chemical substances inside the batteries reacts even without any connections between the electrodes. Those internal reactions reduce the stored charge of the battery and thus decrease the capacity of the battery little by little. This phenomenon is called self-discharge.

Do lithium ion batteries self discharge?

YES, But very slowly – 1% a month is the sort of number you will see

If you want to know more about the Self-discharge of batteries, you can click here.

Rechargeable batteries and self-discharge – extremely short life span?

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