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ProLogium Starts Mass Production of Gen 3.5 Solid-State Battery in Taiwan
On Sept. 2, 2026, ProLogium said its Gen 3.5 Lithium Ceramic Battery entered mass production at its Giga level Taiwan facility.
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Key takeaways
- On Sept. 2, 2026, ProLogium said its Gen 3.5 Lithium Ceramic Battery entered mass production at its Giga level Taiwan facility.
- TÜV reported 381 Wh/kg gravimetric energy density and 903 Wh/L volumetric energy density for the large format cell.
- ProLogium presents Gen 3.5 as a bridge from earlier commercial and specialty applications toward automotive production, with Gen 4 planned as a later step focused on inorganic electrolytes, manufacturing simplicity an...
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openai.comCreate a landscape editorial hero image for this Studio Global article: What did Taiwanese battery maker ProLogium Technology announce about the start of mass production of its Generation 3.5 lithium-ceramic all-. Article summary: ProLogium announced that its Gen 3.5 Lithium Ceramic Battery (LCB) has entered mass production at its Giga-level facility in Taiwan—its stated move from laboratory and pilot-scale solid-state development to industrial pr. Topic tags: general, general web. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, watermarks, charts with fake numbers, clic
ProLogium Technology says it has begun mass production of its Generation 3.5 Lithium Ceramic Battery (LCB) at a Giga-level facility in Taiwan. The announcement is significant because it places the company’s high-energy-density all-solid-state design in industrial production rather than leaving it at the laboratory or pilot-line stage. 1
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The company’s reported test results are strong at the cell level, but they should be read separately from the broader question of manufacturing scale. The available evidence confirms the claimed start of production and third-party test results; it does not independently establish output volumes, contract sizes or the timing of planned overseas factories.
What TÜV and UL Solutions reported
The tested product was a 185.4 Ah large-format cell. According to the reported TÜV results, it achieved:
- 381 Wh/kg of gravimetric energy density, measuring energy stored relative to weight.
- 903 Wh/L of volumetric energy density, measuring energy stored relative to volume.
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UL Solutions tested the cell using the vacuum methodology described in China’s GB/T 43568-2026 standard. After six hours at 120°C under vacuum, the cell lost less than 0.05% of its weight. The reported threshold for all-solid-state classification under that methodology is 0.5%, making the measured loss one-tenth of the stated limit. ProLogium says the result supports classifying the cell as all-solid-state under that test framework. 3
These figures describe a particular large-format cell and test conditions. They are not, by themselves, a guarantee of vehicle range, pack-level energy density, charging performance, lifetime or commercial production volume.
Why the Gen 3.5 announcement matters
ProLogium’s central claim is not simply that Gen 3.5 has high energy density. It is that the same battery architecture has moved into mass production at a Giga-level plant. That makes manufacturing repeatability and process scalability as important as the headline performance figures. 1
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The company attributes part of that scalability to its Logithium architecture, which combines a ceramic separator with a proprietary edge-frame design. ProLogium describes the edge frame as supporting perimeter insulation and sealing while helping protect against electrode burrs and define a compatible manufacturing process. 1
ProLogium also points to a commercial history dating back to 2013 and says it has shipped more than 2.4 million LCB-platform cells. That history gives the company a manufacturing record beyond a purely experimental battery program, although the cited material does not establish that all of those cells were Gen 3.5 products or automotive cells. 1
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From specialty applications to automotive supply
The company’s stated strategy is to build on earlier applications in areas such as electronics, wearables, medical products and safety-focused devices while moving toward larger automotive and commercial markets. ProLogium cites IATF 16949 automotive-quality certification, automotive supply agreements and repeat orders, as well as expansion into unmanned systems, as evidence of that transition. 1
In that context, Gen 3.5 functions as a manufacturing bridge: it combines an established lithium-ceramic platform with a larger-format cell aimed at more demanding commercial and automotive uses. The announcement shows progress toward that goal, but customer programs and production scale still need to be assessed through deliveries, verified volumes and sustained factory output.
Gen 4 is planned as the next step
ProLogium’s roadmap does not end with Gen 3.5. Its published Gen 4 material describes a more fully inorganic electrolyte system and manufacturing changes intended to reduce process complexity and cost. The document lists targets of 860 Wh/L and 356 Wh/kg, alongside a bill of materials intended to be comparable with mainstream liquid-electrolyte batteries. Those are published targets, not results that should be treated as equivalent to the Gen 3.5 TÜV measurement. 7
The company’s geographic plan follows the same commercialization logic. Taiwan is the initial production and industrialization base, while France and phased North American localization are intended to bring manufacturing closer to regional customers and automotive supply chains. The available sources do not independently verify the timing or eventual output of those overseas operations.
Bottom line
ProLogium says Gen 3.5 has crossed an important threshold: mass production has begun in Taiwan, and a 185.4 Ah cell has reported 381 Wh/kg, 903 Wh/L and less than 0.05% weight loss in the cited TÜV and UL Solutions testing. The strongest evidence supports a cell-level performance and classification claim plus a stated move into production. Whether that becomes a major automotive battery business will depend on the less visible next tests—consistent factory output, customer deployment, cost and pack-level performance.
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What is the short answer to "ProLogium Starts Mass Production of Gen 3.5 Solid-State Battery in Taiwan"?
On Sept. 2, 2026, ProLogium said its Gen 3.5 Lithium Ceramic Battery entered mass production at its Giga level Taiwan facility.
What are the key points to validate first?
On Sept. 2, 2026, ProLogium said its Gen 3.5 Lithium Ceramic Battery entered mass production at its Giga level Taiwan facility. TÜV reported 381 Wh/kg gravimetric energy density and 903 Wh/L volumetric energy density for the large format cell.
What should I do next in practice?
ProLogium presents Gen 3.5 as a bridge from earlier commercial and specialty applications toward automotive production, with Gen 4 planned as a later step focused on inorganic electrolytes, manufacturing simplicity an...