Will a solid-state battery be the key to making electric SUVs and pickups effective?

Earlier this month, Nissan announced the establishment of a prototype manufacturing facility for all-solid-state battery cells – with plans to set up a pilot production line in Japan by 2024, and an EV in 2028.

The cells potentially offer a one-third fast-charge time, with the potential to double the energy density by weight, according to Nissan, a “game changer for EV democratization” – a cell for which the company is targeting a cost. Only $ 75 per kwh. They are a key part of the company’s Nissan Ambition 2030 plan, which calls for 15 all-electric vehicles for the Nissan and Infinity brands by the end of the decade লক্ষ্য and aims to generate 40% of its U.S. sales of EVs.

The project, in some ways, echoes the efforts made by Nissan Leaf, which more than a decade ago jointly developed automotive-grade lithium-ion cells for the pioneer EV, when suppliers did not meet its requirements এবং and now it is solid-state. Hope to do something similar with battery technology.

In a question-and-answer session with reporters during the announcement, Kazuhiro Doi, Nissan’s corporate VP, leading the Nissan Research Center, noted that solid-state cell EVs could play a key role in both democratizing and enabling larger electric trucks – a very Toyota 2025. A different application than the plan to debut in a hybrid technology.

Ultimate EV Platform - GMC Hummer EV

Ultimate EV Platform – GMC Hummer EV

Truck suspicion is a well-known issue we’ve discussed with other vehicles and automakers – considering Land Rover fuel cells due to the “low returns” of battery packs on large SUVs, and Hyundai suggests that using hydrogen fuel may be smarter – using two-level batteries. Than cell technology. The bigger and heavier the truck, the heavier the battery pack — and the tighter the structure of the truck to support the extra weight of the battery while saving the expected payload for this type of model. For example, look no further than the GMC Hummer EV, which weighs more than 9,000 pounds to pack enough batteries – about a third of its carb weight, more than 200 kwh – to reach the 300 mile range.

Still wheel training

The prototype facility is making every battery prototype by hand, and it already reflects a deeper level of commitment. In addition, Nissan is designing a new generation of motors and inverters to complement solid-state cells, and plans to conduct automaker crash tests, battery safety studies, and durability tests with its prototype cells. These include internal nail-hole testing and X-ray imaging.

Currently, the cells are very small – 20-mAh cells that are single-layer and cover only 2 cm. This year Nissan will also conduct a feasibility study on a laboratory scale and expand the cells into a design in the 3-5 Ah range that is multi-layered and 10-cm wide. The actual production-vehicle cells will be larger.

“I believe we are one of the few OEMs with in-house battery development and manufacturing experience and how do we know from those experiences and market history over the last 10 years,” Dow said. “To make EVs more democratic, () the main innovation is the battery.”

Nissan production for prototype solid-state cells

Nissan production for prototype solid-state cells

If an ASSB is not impregnated properly, it can probably be worse from a safety and durability point of view. Doe noted that for more than 11 years in the market, there have been “Zero Market Incidents” related to the Nissan Leaf fire or thermal escape, emphasizing that safety is also a top priority in new cells.

Part of US cooperation with NASA

Nissan cells benefited from a collaboration between NASA and UC San Diego, where AI techniques created an interlayer – and a database of 131,000 materials – to prevent the growth of lithium dendrites that might otherwise potentially leak through short-circuiting. Cell Doi described the technique as “beyond the expected range” and now has final validity with the actual material.

Solid-state cells use a high-ion-conducting organic electrolyte selected for interface stability with the anode and its high-energy potential, a mesh-like binding process between the active material and the solid electrolyte and precise mixing process that leads to a reduction in cell resistance. . The higher the output, the lower the charging time, Doi explained — and considering the low temperature rise when these cells are charged at a high rate, they can be charged as fast as 100% in just 15 minutes.

Nissan Chill-Out Concept - December 2021

Nissan Chill-Out Concept – December 2021

This may require some warming, as the figure is at 60 C. When charging at 25 সেন C, the ambient temperature is as high as 90% faster charging in 30 minutes. The need for cooling has also decreased.

Also possible for low carbon footprint

Additionally, solid-state cells are much more mass-efficient than lithium-ion cells, so they are more likely to have low CO2 effects based on material reduction. Doi noted that the current liquid lithium-ion battery has a dry process and if it can apply a dry process to it, it can help reduce CO2.

Overall, the goal is to create just one great electric vehicle, Nissan officials have underscored – easy charging, low weight and affordable for mass-market vehicles, not just special vehicles. After an update within a few years of it starting pilot production, the company may show that it has made the right decision to build a solid-state battery at home.

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