Xiaomi Unveils New Solid-state Battery Technology
Xiaomi unveiled a revolutionary new solid-state battery technology that offers superior mechanical strength and stability by replacing liquid-state electrolyte with a solid-state electrolyte. In laboratory tests, Xiaomi’s solid-state battery technology has achieved three remarkable milestones: energy density exceeding 1000Wh/L, a 20% improvement in low-temperature discharge performance, and a significant increase in the pass rate of pinprick experiments.
Energy density exceeds 1000Wh/L, pushing forth advancements in battery materials selection
The first major benefit of solid-state batteries is their increased energy density. Currently, the chemistry used to build batteries has been a major challenge for the industry, with increasing the energy density proving difficult. Theoretically, the ideal material for the negative electrode is lithium metal, as it has two to three times the storage capacity of current silicon-oxygen cathodes, resulting in a significant jump in battery energy density. To ensure the safety of these batteries, an inorganic diaphragm must be used to prevent lithium dendrites from penetrating and causing short circuits.
While the practical application of lithium metal negative electrodes remains difficult and not yet ready for mass production, laboratory tests have shown that solid-state batteries enable battery energy densities to exceed 1000Wh/L. On a modified Xiaomi 13, Xiaomi is able to pack a huge 6,000mAh capacity into its compact body, significantly prolonging its battery life using this technology.
20% improvement in low-temperature discharge for reliable performance in winter
Another major benefit of solid-state batteries is their improved performance at low temperatures. The liquid electrolyte in traditional batteries has a high viscosity at low temperatures, hindering the ability to transport lithium ions and resulting in a drastic 60% drop in lithium conductivity, which greatly impacts the battery performance in winter. By replacing the liquid electrolytes with a solid-state material, the battery maintains the necessary lithium conductivity even at low temperatures.
Under our Xiaomi Labs environment, the solid-state battery has demonstrated a 20%+ improvement in performance compared to regular batteries at -20°C, providing reliable operation in cold climates and conditions.
Reliable protection with higher passing rates in pinprick tests
While pinprick tests have traditionally yielded low passing rates for conventional non-solid state batteries, accidents such as short-circuiting and combustion can occur during these tests. These incidents arise when the positive current collector foil comes into contact with the active material at the negative end during the impact, resulting in a temperature rise in the battery that in turn increases the risk of combustion.
Solid-state batteries have seen remarkable improvements in their resistance to pinprick tests. By coating the positive electrode with a solid electrolyte ceramic, the solid electrolyte layer forms a downward curve to enclose the positive current collector fluid and separate it from the negative electrode. This blocks any contact between the positive and negative electrodes during the piercing, markedly increasing the pass rate of the pinprick test, and providing a higher level of safety in use.
With advantages of high battery density, low-temperature tolerance, and ultra-safe features, the groundbreaking solid-state batteries set a new benchmark in battery industry. Xiaomi is committed to the exploration of cutting-edge battery technology innovations, aiming to offer superior user experiences in this new era.
About Xiaomi Corporation
Xiaomi Corporation (“Xiaomi”) was founded in April 2010 and listed on the Main Board of the Hong Kong Stock Exchange on July 9, 2018 (1810.HK). Xiaomi is a consumer electronics and smart manufacturing company with smartphones and smart hardware connected by an IoT platform at its core. Embracing our vision of “Make friends with users and be the coolest company in the users’ hearts”, Xiaomi continuously pursues technological innovations, compelling user experience and operational efficiency. The company relentlessly builds amazing products with honest prices to let everyone in the world enjoy a better life through innovative technology. Xiaomi is one of the world’s leading smartphone companies. The company’s market share in terms of smartphone shipments ranked no. 3 globally in the first quarter of 2022. The company has also established the world’s leading consumer AIoT (AI+IoT) platform, with more than 478 million smart devices connected to its platform (excluding smartphones, tablets and laptops) as of March 31, 2022. Xiaomi products are available in more than 100 countries and regions around the world. In August 2022, the company made the Fortune Global 500 list for the fourth time, ranking 266th, up 72 places compared to 2021. Xiaomi is a constituent of the Hang Seng Index, Hang Seng China Enterprises Index, Hang Seng TECH Index and Hang Seng China 50 Index.
Did this article help you? If so, please tell me in a comment what do you think about it.
Don’t miss any of our future video tutorials, follow us on Youtube. Like us on Facebook. Join our Best Deals Telegram Channel. Join our Android TV Box Firmware Updates Telegram Channel. Subscribe now to our newsletter.
