SES Bets On Li-Metal Batteries For EV Future

Highlights :

  • SES AI Corporation is a manufacturer and developer of hybrid Li-Metal rechargeable batteries for electric vehicles (EV) and other applications
SES Bets On Li-Metal Batteries For EV Future

Headquartered in Massachusetts, SES AI Corporation is a manufacturer and developer of Hybrid Li-Metal rechargeable batteries for electric vehicles (EV) and other applications. SES AI was founded on April 17, 2012, originally as SolidEnergy Systems. Its Li-Metal batteries combine the high energy density of Li-Metal with the cost-effective, large-scale manufacturing of conventional Li-ion batteries. SES has an international presence with operations in Boston, Shanghai, Seoul, and Singapore.

SES takes a systems approach to develop and commercialise Li-Metal batteries, and it has three main development tracks, namely Hermes – a platform for new material development; Apollo – for engineering capability for large automotive cells; and, Avatar – an AI-powered safety software monitoring battery health. The firm has produced more than 15,000 multi-layer Li-metal cells on its production lines.

Lithium-metal batteries

While Li-ion batteries are the industry standard for EVs today, automakers are placing bets on companies racing to develop the “holy grail” of EV power: lithium-metal batteries. Lithium-metal batteries are much lighter than lithium-ion batteries. Their higher density is expected to offer increased range and faster charging—capable of driving 500 to 600 miles on a single charge. Further, it would cut down charge time to minutes.


The firm has a market cap of around $1 billion. In total, SES has raised a total of $600.1M in funding over 10 rounds with their latest funding coming in February 2022, from a Post-IPO Equity round. SES is backed by some of the top global automotive OEMs, financial investors, cell manufacturers, equipment manufacturers, and raw material suppliers.

The list of its strategic and financial investors includes energy and chemicals conglomerate SK, mining and manufacturing company Tianqi, semiconductor equipment manufacturer Applied Materials, investment firms Vertex Ventures and Temasek Holdings, affiliates of automotive suppliers LG and Foxconn Technology Group, and global OEMs GM, Hyundai, Geely Auto Group and Shanghai Auto. Among this group, GM and Hyundai are parties to existing joint development agreements with SES.


The firm came to the limelight when it entered into Pre-A sample joint development (JDA) agreements with General Motors, Hyundai and Honda from 2019 to 2020, and all of them became A-sample JDAs in 2021 (General Motors in March, Hyundai in July and Honda in December). SES, in 2021, set an aim to have a Lithium-metal battery ready for commercially sold cars by 2025.

The firm set up SES Shanghai in 2019 in the “auto town” of Jiading to leverage the supply chain and engineering and manufacturing efficiency in China and Korea. SES Shanghai was expanded to Shanghai Giga in November 2021. SES added 0.2 GWh with its Shanghai Giga Phase I in March 2022. The 1 GWh Phase II is expected to be ready to use in 2023.

SES Korea was started in January 2022 and Dr Qichao Hu, Founder and CEO of SES AI, disclosed the Company’s new facility in Chungju in December. The added manufacturing capacity in South Korea will also strengthen ties with SES AI’s joint development agreement OEMs, GM, Hyundai and Honda.

Hu also showcased a video featuring a successful Electric Vertical Take Off and Landing (eVTOL) aircraft test flight powered by SES AI’s 100Ah Li-Metal battery pack and AI-powered safety software Avatar.

Future Scope

The company aims to deliver C-sample cells, modules, and vehicles in 2024 to its JDA automakers, and also targets to facilitate commercial production by 2025. The firm is working to build up its supply chains around lithium foil on two fronts – a global China-inclusive one and a North American (China-free) one.

SES AI Supply Chain

SES AI Supply Chain

The Mine-to-Men AI software tracks data – such as carbon footprint, raw material cost, water content, cost, optimizing battery environments to improve battery health, etc. – from “mines”, battery materials, battery manufacturing, vehicle data, to recycling – the used batteries become the mine for future batteries. Beyond SES Li-metal batteries, the company also teases the idea of commercialising this Mine-to-Men AI. The continuous learning of AI can also potentially be monetized to create entirely new business models such as Battery-as-a-Service BaaS, where all the data analytics around raw material cost, carbon footprint, battery health, driver behaviour, etc., can all be factored into leasing economics, the firm states.

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Junaid Shah

Junaid holds a Master of Engineering degree in Construction & Management. Being a civil engineering postgraduate and using his technical prowess, he has channeled his passion for writing in the environmental niche.