Lithium ion (Li-ion) batteries, we hardly knew ye.
Today’s mass-marketed light duty plug-in electric vehicles (PEVs) uniformly rely on batteries with Li-ion chemistries, but advancing the technology will hit an upper limit of performance by the end of the decade. Battery makers that spoke at the late October eCarTec conference in Munich stated that the energy density can be doubled while cutting the cell cost of PEV batteries in half by 2020, but that beyond that, battery makers will need to shift to other technologies.
Energy storage and automotive power electronics company Robert Bosch and automaker Renault both presented similar timelines for the beginning of the phaseout of Li-ion batteries. Li-ion cell prices will come down thanks to efficiencies in volume manufacturing at plants run by companies such as Tesla and LG Chem and reductions in the amounts of precious metals used. According to Navigant Research’s report Advanced Energy Storage for Automotive Applications, Li-ion pack prices (which include the battery management systems, cooling systems, electronic controls, and wiring) will continue to decline by 5%-6% annually through the remainder of the decade.
Once manufacturing and raw material costs have been optimized, other technologies such as lithium-air, lithium sulfur, and solid-state batteries will begin to take over as the technologies that will offer increased performance in PEVs, said Dr. Holger Fink, senior vice president of Engineering at Robert Bosch Battery Systems GmbH. Fink said that solid state battery technology is the most likely of the alternative battery technologies to be commercialized in the short term, with lithium sulfur unlikely to be commercially viable until closer to 2030.
Bosch is developing solid state battery technology based on the intellectual property it acquired when the company purchased startup battery company SEEO in September 2015. Fink said the solid-state batteries that Bosch are developing feature lithium metal anodes that have increased storage capacity and replaces a flammable liquid electrolyte with a safer dry polymer. One challenge for solid state batteries is the high minimal operating temperature of at least 80°C, which Fink said the company is focusing on in its research.
According to Navigant Research, and as seen in the chart below, by 2020, the global market for Li-ion batteries in automotive applications will reach $25 billion.
Total Light Duty Consumer Vehicle Li-ion Battery Revenue by Powertrain Type, World Markets: 2015-2024
Masato Origuchi, chief battery engineer for EV/HEV at Renault and another speaker at eCarTec, echoed Fink’s comments about the 5-year timeframe for Li-ion battery performance gains peaking. He said that improvements in energy density in Li-ion batteries will be able to provide 200 miles of driving range in battery electric vehicles (BEVs) such as the Nissan LEAF (a Renault-Nissan Alliance partner) by 2020. Origuchi said that further improvements in energy density via other technologies could extend the range of a BEV to 600 km (372 miles) or more.
Disruptive innovations in energy storage and many other automotive technologies often takes years longer than initially expected to gain market share over the incumbents due to higher prices and the cautious nature of automakers. As a result, the market share for Li-ion batteries can be expected to erode slowly, even after better performing technologies are first commercialized.
Tags: Advanced Batteries, Electric Vehicles, Finance & Investing, Transportation Efficiencies
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