<div id="readability-page-1"><figure><img width="1400" height="700" src="https://imageproxy.pbkrs.com/https://electrek.co/wp-content/uploads/sites/3/2026/03/solid-state-ev-battery-patent-CATL-1.jpeg/query-cXVhbGl0eT04MiZzdHJpcD1hbGwmdz0xNDAw?x-oss-process=image/auto-orient,1/interlace,1/resize,w_1440,h_1440/quality,q_95/format,jpg" original-src="https://imageproxy.pbkrs.com/https://electrek.co/wp-content/uploads/sites/3/2026/03/solid-state-ev-battery-patent-CATL-1.jpeg/query-cXVhbGl0eT04MiZzdHJpcD1hbGwmdz0xNDAw"/></figure><p>CATL filed an international patent, detailing how its solid-state battery cell and electrolyte material can help overcome one of the biggest challenges in bringing the new tech to market.</p><span id="more-459111"></span><h2 id="h-catl-patent-explains-new-solid-state-ev-battery-system">CATL patent explains new solid-state EV battery system</h2><p>CATL widened its lead in the global EV battery market last year, accounting for nearly 40% sales. To stay ahead, the company is advancing new battery chemistries, including sodium-ion and solid-state, promising to unlock considerable improvements in driving range, charging speeds, and safety.</p><p>A new patent published by the World Intellectual Property Organization (WIPO) offers a closer look at how CATL’s solid-state battery system works.</p><p>The patent, titled “Positive Electrode Sheet, Solid-State Battery Cell, Battery Device, Electric Device, and Positive Electrode Active Material and Preparation Method Therefor,” was published on March 5, 2026.</p></div>

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<p>CATL has filed an international patent for its solid-state EV battery technology, which aims to address significant challenges in market implementation. The patent outlines advancements in battery chemistry, including sodium-ion and solid-state systems, enhancing driving range, charging speeds, and safety. CATL, which held nearly 40% of global EV battery sales last year, continues to innovate to maintain its market leadership. The patent was published by WIPO on March 5, 2026.</p>

Solid-state EV battery patent reveals CATL’s ambitious plans