{"id":3895,"date":"2026-10-23T22:56:12","date_gmt":"2026-10-23T22:56:12","guid":{"rendered":"https:\/\/xesi.net\/?p=3895"},"modified":"2026-10-23T22:56:12","modified_gmt":"2026-10-23T22:56:12","slug":"finnish-startup-donut-labs-solid-state-ev-battery-passes-extreme-30c-cold-weather-test","status":"publish","type":"post","link":"https:\/\/xesi.net\/?p=3895","title":{"rendered":"Finnish Startup Donut Lab\u2019s Solid-State EV Battery Passes Extreme -30\u00b0C Cold-Weather Test"},"content":{"rendered":"

Mystery continues to swirl around a revolutionary new electric vehicle battery from Finnish startup Donut Lab, which has just successfully passed an extreme cold-weather performance test. As the broader automotive landscape navigates falling battery manufacturing costs and rising fuel prices, the electric vehicle transition relies heavily on achieving performance metrics that match or exceed internal combustion engines. Donut Lab has just taken a significant step toward that goal, proving its technology can withstand harsh sub-zero temperatures without external heating or cooling systems.<\/p>\n

One EV Battery To Rule Them All, Eventually<\/h3>\n

If the name Donut Lab sounds familiar to clean technology enthusiasts, it is because the company has captured the attention of the electric vehicle community with an unusual and remarkably bold story. The startup initially unveiled its cutting-edge solid-state EV battery at the Consumer Electronics Show, positioning it as the world\u2019s first solid-state battery ready for commercial use in original equipment manufacturer vehicle manufacturing. Alongside that bold debut, the company pledged to transparently share the rigorous results of independent third-party testing.<\/p>\n

When the company claimed a full charge time of just five minutes alongside an energy density of 400 Wh\/kg, skeptics immediately questioned whether the figures were simply too good to be true. However, rather than shying away from the criticism, Donut Lab backed up its statements by publishing an ongoing video series and supporting documentation detailing independent assessments conducted at the VTT Technical Research Centre of Finland. By opening its testing process to meticulous third-party validation, the startup has continually provided granular technical reports for public scrutiny, directing the curious to its informational website at I Donut Believe.<\/p>\n

New EV Battery Takes The Heat\u2026<\/h3>\n

Donut Lab has kept the VTT research team busy since the initial product unveiling. Earlier in the year, VTT issued a performance report validating that the new battery could successfully operate at 100 degrees Celsius, which is the boiling point of water. That unexpected milestone led industry observers and technical analysts to conclude that the underlying chemistry of the battery is likely not based on traditional lithium formulations, as many had originally surmised.<\/p>\n

Independent laboratory data showing stable performance at 100 degrees Celsius quickly dismantled earlier skepticism, while also presenting a major puzzle for conventional lithium-ion assumptions. Standard lithium-ion cells cannot function at such high temperatures without severe degradation or catastrophic failure. During the independent tests involving the Donut Lab battery, the thin membrane surrounding the pouch experienced a breach. Researchers noted that if the contents had consisted of standard lithium-ion chemistry utilizing a liquid organic electrolyte, the incident would have triggered significant outgassing and an immediate fire. Instead, the cell managed the stress without the volatile hazards typically associated with conventional battery architectures.<\/p>\n

\"New<\/figure>\n

\u2026And Cracks The Cold Code<\/h3>\n

In the latest major development, Donut Lab published a new VTT validation report confirming that its solid-state battery retains an impressive 99 percent capacity at freezing temperatures plunging down to minus 30 degrees Celsius, or minus 22 degrees Fahrenheit. This achievement directly addresses one of the most common criticisms leveled against electric vehicles by skeptics, who frequently argue that severe winter weather drastically diminishes battery range and overall vehicle usability.<\/p>\n

While cold weather does impact electric vehicle range, internal combustion engine vehicles also suffer notable drops in fuel efficiency during freezing winter months. Regardless of powertrain type, drivers universally rely on careful trip planning to avoid getting stranded in adverse weather conditions. Nevertheless, automotive engineers continuously seek ways to optimize performance. While traditional electric vehicles rely on complex thermal management systems to protect packs from extreme temperature fluctuations, Donut Lab is making a compelling case for building temperature resilience directly into the chemical and physical architecture of the battery itself.<\/p>\n

The recent VTT test regimen evaluated a specialized module comprising 14 individual battery cells. Researchers placed the module inside a temperature chamber set to minus 30 degrees Celsius and left it undisturbed for five hours until it was completely frozen through. Subsequent measurements revealed that the module retained an astounding 97 percent of its ampere-hour capacity when compared against a baseline measurement taken at a comfortable 25 degrees Celsius, roughly 77 degrees Fahrenheit.<\/p>\n

According to the official Donut Lab press statement, the module charged and discharged completely normally following the deep-freeze conditions, exhibiting zero adverse effects from the cold. Crucially, the testing process deliberately excluded any external heating, cooling, or insulation equipment. Company representatives emphasized that they intentionally eliminated every conventional advantage a battery might normally rely on during winter operations.<\/p>\n

Ville Piippo, Chief Technology Officer at Donut Lab, elaborated on the significance of the findings, noting that a typical lithium-ion battery would struggle to provide even a momentary pulse of power under such severe thermal stress. Piippo reiterated that the validation confirms the company\u2019s core promise of maintaining high capacity using a fully exposed module, completely free from auxiliary heaters or clever engineering tricks.<\/p>\n

\"New<\/figure>\n

EV Battery Mystery Solved\u2026 Not!<\/h3>\n

Because Donut Lab has chosen a step-by-step public validation journey, several milestones remain before a comprehensive, whole-of-system report can be considered complete. Beneath the rigorous scientific data, the overarching mystery surrounding the exact chemical makeup of the battery remains unsolved. <\/p>\n

Initial speculation pointed toward nickel-manganese-cobalt formulations, but that hypothesis has since been discounted by technical analysts. Meanwhile, major automotive manufacturers in the United States, such as Ford and General Motors, are exploring alternative pathways to balance cost and performance. General Motors has indicated that its Spring Hill, Tennessee facility will soon begin producing lithium manganese-rich formulas designed to compete with lower-cost lithium-iron-phosphate batteries while offering superior energy density. <\/p>\n

Ford has also navigated shifting battery strategies as it prepares for the production of its upcoming affordable electric pickup truck. With a targeted price point just under thirty thousand dollars, the vehicle is expected to rely heavily on accessible, domestically produced lithium-iron-phosphate technology. As legacy automakers refine their supply chains and chemistry choices to mass-produce affordable electric mobility options, independent innovators like Donut Lab continue to challenge conventional engineering paradigms, leaving the global automotive industry watching closely for the next revealed piece of the puzzle.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mystery continues to swirl around a revolutionary new electric vehicle battery from Finnish startup Donut Lab, which has just successfully passed an extreme cold-weather performance test. As the broader automotive landscape navigates falling battery manufacturing costs and rising fuel prices, the electric vehicle transition relies heavily on achieving performance metrics that match or exceed internal […]<\/p>\n","protected":false},"author":1,"featured_media":3894,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[161],"tags":[2157,3118,6110,163,162,4231,6109,164,3432,6111,3859,300,841,1633],"class_list":["post-3895","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environment-and-energy","tag-battery","tag-cold","tag-donut","tag-energy","tag-environment","tag-extreme","tag-finnish","tag-green","tag-passes","tag-solid","tag-startup","tag-state","tag-test","tag-weather"],"_links":{"self":[{"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts\/3895","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3895"}],"version-history":[{"count":0,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts\/3895\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/media\/3894"}],"wp:attachment":[{"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3895"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}