{"id":24370,"date":"2025-06-11T17:56:04","date_gmt":"2025-06-11T15:56:04","guid":{"rendered":"https:\/\/exoes.com\/ascendance-unveils-sterna-hybrid-pack-and-partners-with-exoes-to-accelerate-the-industrialization-of-hybrid-electric-aviation\/"},"modified":"2025-09-10T16:12:34","modified_gmt":"2025-09-10T14:12:34","slug":"ascendance-unveils-sterna-hybrid-pack-and-partners-with-exoes-to-accelerate-the-industrialization-of-hybrid-electric-aviation","status":"publish","type":"post","link":"https:\/\/exoes.com\/en\/ascendance-unveils-sterna-hybrid-pack-and-partners-with-exoes-to-accelerate-the-industrialization-of-hybrid-electric-aviation\/","title":{"rendered":"Ascendance unveils STERNA Hybrid Pack and partners with EXOES to accelerate the industrialization of hybrid\u2011electric aviation"},"content":{"rendered":"\n<p><strong>Toulouse, June 10, 2025<\/strong> \u2013 At the 55th International Paris Air Show, Ascendance, a European pioneer in decarbonized aviation, announced the launch of the <a href=\"https:\/\/www.ascendance-ft.com\/products\/sterna\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>STERNA Hybrid Pack<\/strong><\/a>, its proprietary <strong>hybrid-electric propulsion<\/strong> system. This modular solution natively integrates a propulsion battery designed specifically for hybrid-electric aviation, an energy management system, and an electrical distribution unit. The system is engineered to combine <strong>performance, energy efficiency, and compliance with stringent aviation certification requirements.<\/strong><\/p>\n\n\n\n<p>To develop this <a href=\"https:\/\/exoes.com\/en\/achievements\/high-performance-battery-manufacturing-for-electric-vehicles\/\"><strong>high-performance battery<\/strong><\/a>, Ascendance partnered with EXOES, a leading French specialist in thermal systems and <strong>batteries for mobility.<\/strong><\/p>\n\n\n\n<p>This strategic partnership is based on a shared vision to <strong>accelerate the industrialization of certifiable, hybrid-electric propulsion solutions manufactured in France<\/strong> that meet the demanding standards of the aerospace and defense sectors.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default wp-duotone-unset-1\" style=\"margin-top:50px;margin-bottom:50px\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"140\" src=\"https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/Ascendance-X-Exoes-1024x140.png\" alt=\"\" class=\"wp-image-24018\" srcset=\"https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/Ascendance-X-Exoes-1024x140.png 1024w, https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/Ascendance-X-Exoes-300x41.png 300w, https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/Ascendance-X-Exoes-768x105.png 768w, https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/Ascendance-X-Exoes.png 1100w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Hybrid-Electric: The Pioneering Choice for Decarbonizing Aviation<\/h2>\n\n\n\n<p>Since 2018, Ascendance has been convinced <strong>that hybrid-electric technology is the most realistic and effective way to reduce aviation&#8217;s carbon footprint<\/strong> in the short and medium term. Unlike all-electric solutions, which are limited by range and charging constraints, and unlike hydrogen, which is not yet mature, hybrid systems can reduce emissions while maintaining operational flexibility.<\/p>\n\n\n\n<p>When combined with <strong>sustainable aviation fuels (SAFs)<\/strong>, hybridization optimizes environmental performance by reducing SAF consumption and <strong>lowering operating costs<\/strong> for operators while <strong>easing pressure<\/strong> on alternative fuel production. This pragmatic solution is designed for a credible transition.<\/p>\n\n\n\n<p>EXOES, a <strong>committed player<\/strong> in decarbonizing mobility, views hybrid-electric aviation as a strategic means of combining <strong>safety, energy performance, and emissions reduction<\/strong> while creating new industrial opportunities in France and abroad.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"margin-top:50px\">Ascendance and EXOES have formed a key industrial partnership focused on performance.<\/h2>\n\n\n\n<p>Leveraging their respective areas of expertise, <strong>Ascendance and EXOES<\/strong> have joined forces to design and produce batteries tailored specifically for the needs of hybrid-electric aviation.<\/p>\n\n\n\n<p>These unique batteries power the <strong>STERNA Hybrid Pack<\/strong>, which offers a comprehensive hybrid-electric propulsion solution. This partnership is a significant milestone for Ascendance, demonstrating its ability to produce and <strong>industrialize hybrid-electric propulsion systems in France.<\/strong><\/p>\n\n\n\n<p>Ascendance is responsible for the system architecture, the <strong>Hybrid Energy Management System<\/strong>, onboard control and safety devices, and the <strong>Hybrid Core Unit<\/strong>, ensuring <strong>performance and compliance with aviation certification standards.<\/strong><\/p>\n\n\n\n<p>EXOES contributes cutting-edge expertise in cell assembly, advanced thermal management, and extreme testing to guarantee robustness, reliability, and compliance with aviation requirements.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin-top:50px;margin-bottom:50px\"><img decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/battery-system-1024x525.jpg\" alt=\"Exoes hybrid aviation battery system plan\" class=\"wp-image-24029\" srcset=\"https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/battery-system-1024x525.jpg 1024w, https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/battery-system-300x154.jpg 300w, https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/battery-system-768x394.jpg 768w, https:\/\/exoes.com\/wp-content\/uploads\/2025\/06\/battery-system.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" loading=\"lazy\" \/><\/figure>\n\n\n\n<p><em>&#8220;This partnership with EXOES demonstrates the consolidation of our hybridization strategy. Since Ascendance&#8217;s founding in 2018, we have developed and tested our hybrid technologies in order to build a decarbonized, certifiable hybrid aviation industry. The Hybrid Pack is not a transitional technology; it is the foundation of a new generation of propulsion.\u201d<\/em><br>\u2014 <strong>Jean-Christophe Lambert<\/strong>, CEO of Ascendance<\/p>\n\n\n\n<p><em>\u201cSince 2017, EXOES has specialized in designing and manufacturing high-performance batteries with enhanced safety. Aerospace and defense are our top-priority markets. This partnership with Ascendance has already attracted our first customers, and we are eager to accelerate the market launch of our joint products and services.&#8221;<\/em><br>\u2014 <strong>Arnaud Desrentes<\/strong>, CEO of EXOES<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"margin-top:50px\">An integrated system ready for multiple markets!<\/h2>\n\n\n\n<p>Unveiled exclusively at the Paris Air Show, the <strong>STERNA Hybrid Pack<\/strong>, owned by Ascendance, represents a major technological breakthrough. It is designed to meet the <strong>operational, economic, and environmental needs of tomorrow\u2019s aviation.<\/strong><\/p>\n\n\n\n<p>It is modular and compact and can be easily integrated into a <strong>wide range of platforms<\/strong>, including VTOLs like ATEA, long-range drones, light helicopters, and regional aircraft, to boost range, reduce emissions, and enable a gradual transition to cleaner aviation.<\/p>\n\n\n\n<p>Designed for constrained environments, the <strong>STERNA Hybrid Pack offers dual charging capabilities: <\/strong><br><br>\u2022 <strong>In-flight<\/strong> for time savings and total independence from ground infrastructure<br>\u2022 <strong>On the ground<\/strong>, to leverage existing networks when available<\/p>\n\n\n\n<p>This operational flexibility enables a <strong>wide range of real-world use cases<\/strong>, such as medical or surveillance missions in remote areas, regional connections on short runways, and logistics or tourism services in non-electrified regions. These markets all seek immediately deployable, certifiable solutions.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-a89b3969 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-link-color wp-element-button\" href=\"https:\/\/exoes.com\/en\/recruitment-and-contact\/contact\/\">Contact us to discover all our services<\/a><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-default\" style=\"margin-top:50px;margin-bottom:50px\"\/>\n\n\n\n<p><strong>About Ascendance<\/strong><\/p>\n\n\n\n<p>Founded in 2018 by Jean-Christophe Lambert, Thibault Baldivia, Cl\u00e9ment Dinel and Beno\u00eet Ferran, Ascendance is an industrial startup with a mission to decarbonize aviation. Founded in 2020 in the heart of Toulouse, the European aeronautics capital, it develops and commercializes two solutions: an innovative hybrid-electric propulsion system called <strong>STERNA<\/strong> and a vertical take-off and landing (VTOL) aircraft equipped with this technology called ATEA.<\/p>\n\n\n\n<p>Press Contacts &#8211; Kalamari Agency &#8211; Kelly Wright \/ Natacha Favry &#8211; <a href=\"mailto:ascendance@kalamari.agency\">ascendance@kalamari.agency<\/a><\/p>\n\n\n\n<p><strong>About EXOES<\/strong><\/p>\n\n\n\n<p>Founded in 2009 in Gradignan by <a href=\"https:\/\/www.linkedin.com\/in\/r%C3%A9mi-daccord-exoes\/\" target=\"_blank\" rel=\"noopener\">R\u00e9mi Daccord<\/a> and <a href=\"https:\/\/www.linkedin.com\/in\/arnaud-desrentes-b827a125\/\" target=\"_blank\" rel=\"noopener\">Arnaud Desrentes<\/a>, EXOES specializes in <a href=\"https:\/\/exoes.com\/en\/achievements\/high-performance-battery-manufacturing-for-electric-vehicles\/\">advanced battery systems<\/a> and <a href=\"https:\/\/exoes.com\/en\/achievements\/battery-immersion-cooling\/thermal-systems\/\">thermal management solutions<\/a>. The company brings deep expertise in the design, manufacturing, and testing of high-performance batteries, optimizing energy storage, thermal efficiency, and safety. Active in several sectors\u2014including automotive, rail, defense, and aerospace\u2014EXOES stands out for its mastery of cooling technologies, particularly with E-Mersiv, its patented immersion cooling system. This technology has been successfully applied in the development and validation of numerous battery concepts designed for fast charging and enhanced safety.<\/p>\n\n\n\n<p class=\"has-text-align-left\"><\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-a89b3969 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-link-color wp-element-button\" href=\"https:\/\/exoes.com\/en\/recruitment-and-contact\/contact\/\">Contact us to discover all our services<\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Toulouse, June 10, 2025 \u2013 At the 55th International Paris Air Show, Ascendance, a European pioneer in decarbonized aviation, announced the launch of the STERNA Hybrid Pack, its proprietary hybrid-electric propulsion system. This modular solution natively integrates a propulsion battery designed specifically for hybrid-electric aviation, an energy management system, and an electrical distribution unit. The [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":24015,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-24370","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>High-performance batteries for hybrid-electric aviation<\/title>\n<meta name=\"description\" content=\"EXOES partners with Ascendance to produce high-performance batteries for hybrid-electric aviation\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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