--- title: "CATL makes progress on its solid-state battery" type: "News" locale: "zh-HK" url: "https://longbridge.com/zh-HK/news/279018020.md" description: "CATL has made significant strides in solid-state battery development, obtaining a new patent and securing a large supply of copper foil. The patent focuses on a solid sulfide electrolyte, aiming for an energy density of 500 Wh/kg. CATL plans to produce a small series of these batteries by 2027, with pilot production already underway. The company has reserved 626,000 tonnes of copper foil for future scaling, valued at €8.4 billion. Additionally, CATL is part of a consortium to accelerate the commercialization of solid-state batteries in China, emphasizing the country's commitment to maintaining its lead in electric vehicle battery technology." datetime: "2026-03-13T09:30:15.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/279018020.md) - [en](https://longbridge.com/en/news/279018020.md) - [zh-HK](https://longbridge.com/zh-HK/news/279018020.md) --- > 支持的語言: [简体中文](https://longbridge.com/zh-CN/news/279018020.md) | [English](https://longbridge.com/en/news/279018020.md) # CATL makes progress on its solid-state battery For years, CATL has been working towards producing a small series of solid-state batteries by 2027. A new patent now reveals how the Chinese battery giant plans to achieve this. The document was published on 5 March 2026 by the World Intellectual Property Organisation (WIPO) and is titled ‘Positive Electrode Sheet, Solid-State Battery Cell, Battery Device, Electric Device, Positive Electrode Active Material and Preparation Method Therefor.’ The patent summary indicates that CATL is focusing on a solid sulfide electrolyte. The anode active material comprises layers of a substrate material, a cobalt-rich material, and a coating. The first two layers contain a transition metal oxide, while the coating includes an electrolyte salt. According to the portal Electrek, this salt is a fluorine-containing lithium salt, which offers high thermal stability and can react with the sulfide electrolyte to form lithium fluoride. This reaction is intended to create a protective layer for the battery anode, mitigating the known instability of sulfide electrolytes. While the patent itself does not include a timeline, the portal _CarNewsChina_ reports that CATL has already begun pilot production of solid-state batteries with an energy density of 500 Wh/kg. Furthermore, ‘technical data indicates the company is currently at technology maturity level 4 and aims to reach levels 7 or 8 by 2027. This level signifies the transition from laboratory prototypes to automotive-grade cells ready for pilot-scale vehicle integration,’ the portal states. This aligns with the company’s goal of launching a small series by 2027, as well as China’s announcement that it will publish its first national technical standard for solid-state batteries in July this year. CATL plans to introduce its battery, named Ningde Shidai All-Solid-State, without delay. The company’s short-term goal is to progress from 20-Ah samples to 60-Ah automotive-grade prototypes. Ah stands for ampere-hour, a measure of charging capacity. Meanwhile, CATL appears to be securing supplier services for future scaling. _CarNewsChina_ reports that CATL recently reserved a capacity of 626,000 tonnes of copper foil from Guangdong Jiayuan Technology for the period 2026–2028, valued at approximately €8.4 billion. The portal interprets this as a significant material stockpile for semi-solid and solid-state batteries. However, in October 2025, CATL dialled down expectations, stating that ‘scientific challenges have been largely resolved,’ but technical hurdles remained. Cost was a primary concern. “Sulfide solid-state cells are currently 3–5 times more expensive than conventional lithium-ion,” according to _CarNewsChina_. CATL has been engaged in research and development of solid-state batteries for over a decade. According to an earlier statement by CATL’s Chief Developer, Wu Kai, a large R&D team is now dedicated to solid-state batteries and new battery systems. Collaborations with universities and other players in the battery industry are also expected to accelerate progress. Speaking of collaborations: In early 2024, it was announced that a group of major Chinese battery and automotive manufacturers had joined forces to accelerate the commercialisation of solid-state batteries. CATL is among them. The alliance was initiated by the Chinese government, and the consortium, named the China All-Solid-State Battery Collaborative Innovation Platform (CASIP), aims to develop and produce competitive solid-state batteries and establish a supply chain by 2030. In addition to CATL, the alliance includes battery manufacturers such as CALB, EVE Energy, SVOLT, Gotion High-Tech, and BYD’s battery subsidiary FinDreams Battery. It also comprises several state-owned automotive manufacturers, as well as private companies BYD and Nio. Other participants include representatives from government and academia. According to an earlier report by the Japanese newspaper _Nikkei_, influential state-backed funds are also listed as members of CASIP. This demonstrates China’s determination not to relinquish its market-leading position in electric vehicle batteries due to a technological shift towards solid-state batteries. Against this backdrop, the new consortium will focus on fundamental research, key technologies, the joint development and production of electric vehicles with solid-state batteries, and the establishment of a corresponding supply chain. Notably, the Beijing-coordinated initiative brings together competitors who are often fiercely vying for market share. carnewschina.com, electrek.co, ishare.ifeng.com (in Chinese) ### 相關股票 - [CATL (03750.HK)](https://longbridge.com/zh-HK/quote/03750.HK.md) - [CATL (300750.CN)](https://longbridge.com/zh-HK/quote/300750.CN.md) ## 相關資訊與研究 - [Contemporary Amperex Technology plans to issue bonds](https://longbridge.com/zh-HK/news/278390266.md) - [Contemporary Amperex Technology Co., Limited Reports Earnings Results for the Full Year Ended December 31, 2025](https://longbridge.com/zh-HK/news/278448286.md) - [CATL posts 42% profit jump in 2025](https://longbridge.com/zh-HK/news/278393554.md) - [Contemporary Amperex Technology Co., Limited Class H (3750) Receives a Buy from DBS](https://longbridge.com/zh-HK/news/278471797.md) - [CATL Publishes Unaudited 2025 Annual Results and Details Forthcoming Full Report](https://longbridge.com/zh-HK/news/278460140.md)