A prototype of a seasonal battery appeared. She can store energy in the spring and release it in the fall.

Scientists have created a battery for the power grid that stores energy for several months and does not

loses most of its capacity.

They called it a battery with a cyclefreezing-thawing. She can store energy for a long time in order to use it later. According to the researchers, this is a step towards a new type of battery that can be used for seasonal storage: save energy at one time of the year, such as spring, and use it at another time, such as autumn.

Such developments are important to increase the resilience of the grid when using large amounts of renewable energy.This study is an important step towards solving the problem of seasonal energy storage.

Imre Gük, Director of the Energy Storage Division at the Energy Directorate of the Ministry of Energy

Such batteries will also improve the work of utilities: they will be able to reduce power outages. This is relevant, for example, after various climatic disasters - storms, hurricanes, fires.

First, the battery is charged when it is heated to 180 °C – the ions pass freelyChemical energy is then created through liquid electrolyte, and the battery is then cooled to room temperature.The electrolyte becomes solid, and the ions that transmit energy remain almost stationary.To reactivate the operation, the battery needs to be heated again.

During this process, the battery literallyfreezes and thaws. This is possible due to the fact that molten salt was used as the electrolyte. The material becomes liquid at higher temperatures but solid at room temperature.

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