StoreDot achieves 1,100 cycles with “100in4” battery cells

According to the company, the goal of 1,100 cycles with such a prototype cell was achieved earlier than planned. This cell is also said to have a predicted energy density of 340 Wh/kg “in a large electric vehicle form factor.” The cell chemistry on the cathode is given as “NMC9xx”, while the company’s silicon-based technology is used on the anode

This means, as is often the case with such reports on battery developments, that it is a laboratory test with a small-format prototype cell and the results cannot be transferred 1:1 to ready-to-install battery cells in vehicles. In the case of the current StoreDot demonstrator, it is a cell with a capacity of 3 Ah, so it is hardly suitable for automotive applications. The “100in4” technology will subsequently be scaled to a 140 Ah cell. The tests with this cell should then be much more meaningful.

“Although this is an early prototype and there are still challenges to overcome. We can draw on the experience we gained in seamlessly scaling from a 3Ah cell to a >100Ah EV cell in just a few months have,” says StoreDot CEO Doron Myersdorf. “We believe our roadmap offers a sustainable, practical and proven solution. We are on the path to extremely fast charging that will accelerate the mass adoption of electric vehicles.”

storedot 100in4 graphic

StoreDot presented its strategic technology roadmap “100inX” in March 2022. The first stage, “100in5”, is planned for 2024 and should be able to recharge electricity for 100 miles or 160 kilometers in five minutes. At that time, the “100in3” technology (i.e. recharging 160 kilometers in 3 minutes) was announced for 2028. These are supposed to be solid-state cells with an energy density of around 450 Wh/kg. “100in4” for 2026 would be the logical intermediate step.

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The Israelis demonstrated in October 2022 that StoreDot can achieve high cycle numbers even with cells in a production-ready format. At that time, a large-volume pouch cell with “100in5” technology was subjected to 1,200 cycles – even after that, the 30 Ah cell still had more than 80 percent of its original capacity.

So far, StoreDot has primarily focused on pouch cells. At the end of January 2024, the company announced that it would also transfer its battery technology to prismatic cells. Unlike soft pouch cells, prismatic cells have a solid housing and can therefore also be subjected to structural loads in the battery pack – as is the case with many cell-to-pack concepts. Pouch cells, on the other hand, are first packaged in modules and then integrated into the battery pack – which, with identical energy density at the cell level, leads to a lower energy density at the pack level.

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