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Energy

Gravitricity, the battery that works with the force of gravity

Scottish startup Gravitricity announced this week a working scale prototype of a battery that uses gravity to store energy.

April 24 2021
Gianluca RiccioGianluca Riccio
⚪ 2 minutes
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Gravity battery

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This alternative to chemical batteries requires only gravity and a few seconds to release the stored energy. The developers expect their solution to be in demand in the rapidly developing renewable energy market.

In a port area of ​​Scotland there is a sort of elevator shaft with a height of four stories. However, there is no elevator. In its place, a 50-ton iron weight fixed on steel cables.

A battery powered by gravity

Slowly, the electric motors lift the weight up to half the height: now it's a huge battery that stores potential energy thanks to gravity. When needed, the iron with a howl flies down the structure, the engine becomes a generator and produces 250 kW of energy. Or at least it is what we read in Science.

Battery gravity
A reconstruction of the giant "well" that should allow gravity and the gravitricity system to generate up to 4MW of energy in 2023

Gravitricity is one of the few startups that rethinks the idea of ​​an accumulation of the energy hydroelectric.

The traditional hydroelectric system uses gravity to make sure that excess energy is used to pump water into a reservoir located on a knoll or hill, and at peak load it is drained, releasing electricity. However, such a system requires a specific landscape, expensive infrastructure and a complex authorization process.

The article continues after the related links

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The simple and undemanding design of mines or cranes compares favorably with water storage and lithium batteries (given their limited lifespan): steel cables, winches and loads can last for decades and are relatively inexpensive.

La startup of 14 people plans to build a full-scale plant by 2023 with heavier metal loads and a drop of nearly 1km. It will be able to provide up to 4 MW of power during peak hours.

Something of unprecedented gravity, but in a good way.

Tags: car's battery performanceseverityhydroelectric

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