{"id":22925,"date":"2025-08-21T11:58:06","date_gmt":"2025-08-21T08:58:06","guid":{"rendered":"https:\/\/diagnozabam.ro\/sfaturi\/?p=22925"},"modified":"2026-08-22T08:21:58","modified_gmt":"2026-08-22T05:21:58","slug":"electric-cars-face-a-new-battery-test","status":"publish","type":"post","link":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-cars-face-a-new-battery-test\/","title":{"rendered":"New EU Rules for EV Batteries Starting 2025"},"content":{"rendered":"<h2 dir=\"ltr\">The EU Is Cracking Down on Weak EV Batteries: What Changes From 2025<\/h2>\n<p dir=\"ltr\">The European Union is fundamentally changing how <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">electric<\/a> <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">car<\/a> batteries get approved for sale. This is no longer left to manufacturer goodwill. Mandatory tests are coming, with clear pass-or-fail thresholds.<\/p>\n<p dir=\"ltr\">The news lands at a moment when <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/mercedes-c-class-eq-concept-redefines-electric-sedan\/\">EV<\/a> sales keep climbing across Europe. More <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/pc-freezes-randomly-causes-and-fix\/\">drivers<\/a> are buying <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">electric<\/a> cars every year. More of them are asking a simple question: how safe and durable is the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> sitting under the floor?<\/p>\n<p dir=\"ltr\">These requirements are not an isolated EU initiative. They come from a global technical regulation negotiated under UNECE, and they connect directly to the Euro 7 standards and the EU <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">Battery<\/a> Regulation. A shared testing framework is being built, rolled out progressively across several major markets, not just Europe.<\/p>\n<hr \/>\n<h2 dir=\"ltr\">Why These Tests Are Appearing Now<\/h2>\n<p dir=\"ltr\">Until now, <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/mercedes-c-class-eq-concept-redefines-electric-sedan\/\">EV<\/a> batteries were tested differently by every manufacturer. Each one relied on its own internal validation methods. Consumers had no objective reference point.<\/p>\n<p dir=\"ltr\">That created two real problems:<\/p>\n<ul dir=\"ltr\">\n<li>Some manufacturers fitted lower-quality batteries, with no legal barrier stopping them.<\/li>\n<li><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/pc-freezes-randomly-causes-and-fix\/\">Drivers<\/a> had no reliable way to check a battery&#8217;s true health, especially when buying a used <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/mercedes-c-class-eq-concept-redefines-electric-sedan\/\">EV<\/a>.<\/li>\n<\/ul>\n<p dir=\"ltr\">The new testing framework tackles both issues through common, verifiable, and mandatory technical standards at type approval.<\/p>\n<blockquote>\n<p dir=\"ltr\">\u2139\ufe0f Technical <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/redmi-note-10s-review-still-worth-it-in-2026\/\">Note<\/a>: The framework is built on UN GTR 22, a global technical regulation adopted at UNECE level, gradually transposed into EU law through the Euro 7 standards and the dedicated <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> regulation.<\/p>\n<\/blockquote>\n<hr \/>\n<h2 dir=\"ltr\">What the Tests Actually Check<\/h2>\n<p dir=\"ltr\">The tests cover both immediate safety and long-term durability. They are not limited to a single lab scenario.<\/p>\n<h3 dir=\"ltr\">1. Resistance to Extreme Temperatures<\/h3>\n<p dir=\"ltr\">The <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> must perform correctly in both freezing <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/common-winter-car-starting-mistakes\/\">cold<\/a> and <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/best-apps-to-warn-you-about-heatwaves\/\">extreme heat<\/a>. The <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> management system (BMS) is tested directly under these conditions.<\/p>\n<p dir=\"ltr\">The tests simulate:<\/p>\n<ul dir=\"ltr\">\n<li>Startup and operation at very low temperatures, typical of northern winters.<\/li>\n<li>Extended operation at high temperatures, typical of southern summers.<\/li>\n<li>How the battery&#8217;s cooling and heating system behaves under <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cpu-overheating-causes-and-fix-guide\/\">thermal<\/a> stress.<\/li>\n<\/ul>\n<p dir=\"ltr\">A <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> that suddenly loses capacity at -15\u00b0C, or overheats at 40\u00b0C, fails the test.<\/p>\n<h3 dir=\"ltr\">2. Fast-Charging Behavior<\/h3>\n<p dir=\"ltr\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/dictionary-of-terms-for-electric-vehicle-batteries\/\">Fast charging<\/a> is the most demanding scenario for a lithium <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a>. High currents generate heat and electrochemical stress on the cells.<\/p>\n<p dir=\"ltr\">The tests check:<\/p>\n<ul dir=\"ltr\">\n<li>Correct voltage limiting during charging, to prevent overcharging.<\/li>\n<li>Discharge limiting, to avoid cell damage.<\/li>\n<li>How the electronic system reacts to repeated fast-charging cycles.<\/li>\n<\/ul>\n<h3 dir=\"ltr\">3. Vibration and Impact Safety<\/h3>\n<p dir=\"ltr\">A <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> mounted on a vehicle is under constant vibration from driving. In a crash, the risk gets much higher.<\/p>\n<p dir=\"ltr\">The mandatory tests include:<\/p>\n<ul dir=\"ltr\">\n<li>Extended vibration simulations, similar to driving on rough roads.<\/li>\n<li>Controlled short-circuit tests, to check the protection system&#8217;s response.<\/li>\n<li>Enclosure (REESS) checks against fire exposure and mechanical shocks.<\/li>\n<\/ul>\n<blockquote>\n<p dir=\"ltr\">\u26a0\ufe0f WARNING: A <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> that fails vibration and impact tests can trigger fires that are extremely hard to extinguish after a crash. That&#8217;s why these thresholds are becoming mandatory, not optional.<\/p>\n<\/blockquote>\n<h3 dir=\"ltr\">4. Long-Term Capacity Durability<\/h3>\n<p dir=\"ltr\">This is the genuinely new element. It&#8217;s no longer just about immediate safety \u2014 it&#8217;s also about how well the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> holds up over time.<\/p>\n<div dir=\"ltr\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Period<\/th>\n<th scope=\"col\">Mileage<\/th>\n<th scope=\"col\">Maximum Accepted Capacity Loss<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>5 years<\/td>\n<td>100,000 km<\/td>\n<td>under 20%<\/td>\n<\/tr>\n<tr>\n<td>8 years<\/td>\n<td>160,000 km<\/td>\n<td>under 30%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p dir=\"ltr\">In practice, an approved <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> guarantees a minimum level of <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">range<\/a> even after years of heavy use.<\/p>\n<hr \/>\n<h2 dir=\"ltr\">What This Means for Drivers<\/h2>\n<p dir=\"ltr\">For someone driving an <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">electric<\/a> <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">car<\/a> daily, these rules aren&#8217;t a bureaucratic footnote. They directly change the ownership experience.<\/p>\n<ul dir=\"ltr\">\n<li><strong>Safer trips.<\/strong> <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">Battery<\/a> fire risk drops significantly, especially in crash scenarios.<\/li>\n<li><strong>Longer, clearer warranties.<\/strong> Manufacturers will have to declare real <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> degradation thresholds.<\/li>\n<li><strong>Transparency at resale.<\/strong> <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">Battery<\/a> health will be available as standardized information, useful when buying a used <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/mercedes-c-class-eq-concept-redefines-electric-sedan\/\">EV<\/a>.<\/li>\n<li><strong>Possibly higher prices.<\/strong> Extra testing and better materials raise <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> production costs.<\/li>\n<\/ul>\n<p dir=\"ltr\">For someone buying a used <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">electric<\/a> <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">car<\/a>, that last point matters enormously. The battery&#8217;s real condition no longer depends solely on the seller&#8217;s word.<\/p>\n<hr \/>\n<h2 dir=\"ltr\">Industry Reaction<\/h2>\n<p dir=\"ltr\">The industry is split, as usual when new mandatory rules show up.<\/p>\n<p dir=\"ltr\">Some manufacturers see the tests as a costly challenge. Investment in retooling and extra validation isn&#8217;t negligible, especially for smaller producers.<\/p>\n<p dir=\"ltr\">Other manufacturers see it differently. For them, common standards are an image advantage. A customer who knows the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> passed strict testing trusts the final product more.<\/p>\n<p dir=\"ltr\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">Battery<\/a> suppliers are already moving in that direction. They&#8217;re working on:<\/p>\n<ul dir=\"ltr\">\n<li>Non-flammable electrolytes, which drastically cut <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cpu-overheating-causes-and-fix-guide\/\">thermal<\/a> risk in case of a fault.<\/li>\n<li><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-cars-solid-state-batteries-record-range\/\">Solid-state batteries<\/a>, with higher <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/dictionary-of-terms-for-electric-vehicle-batteries\/\">energy density<\/a> and much lower fire risk compared to classic lithium-ion cells.<\/li>\n<\/ul>\n<p dir=\"ltr\">These technologies aren&#8217;t yet mainstream, but the new testing rules are accelerating their adoption.<\/p>\n<hr \/>\n<h2 dir=\"ltr\">What This Means for Mobile Diagnostics and Roadside Mechanics<\/h2>\n<p dir=\"ltr\">For mechanics who work roadside rather than in a shop, information about an approved <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> has direct practical value.<\/p>\n<p dir=\"ltr\">A <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> certified against the new degradation thresholds gives a clear reference point. If a vehicle shows <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">range<\/a> loss well beyond the declared limit, the issue is no longer &#8222;normal for an aging <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a>.&#8221; It&#8217;s a real fault, and one that can be documented.<\/p>\n<p dir=\"ltr\">This transparency helps with faster field diagnostics:<\/p>\n<ul dir=\"ltr\">\n<li>The battery&#8217;s real state can be compared against the manufacturer&#8217;s guaranteed minimum threshold.<\/li>\n<li>Abnormal degradation caused by a BMS or <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/car-thermostat-role-and-how-it-works\/\">cooling system<\/a> fault becomes easier to spot.<\/li>\n<li>Customers get an objective explanation, based on a standard rather than a guess.<\/li>\n<\/ul>\n<p dir=\"ltr\">For a mobile mechanic working directly on the road, this kind of clear technical reference makes the difference between a justified intervention and an unfounded suspicion.<\/p>\n<hr \/>\n<h2 dir=\"ltr\">Rollout Timeline<\/h2>\n<p dir=\"ltr\">These rules aren&#8217;t appearing overnight \u2014 they&#8217;re phased in as UNECE standards get transposed into EU law.<\/p>\n<ul dir=\"ltr\">\n<li>Since 2023, new type approvals already have to meet the updated version of the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> safety tests.<\/li>\n<li>From September 2025, all type approvals, including older ones, must fully comply with the new requirements.<\/li>\n<li>From 2025, the declarative phase of the EU <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">Battery<\/a> Regulation also begins, with <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/xiaomi-secret-2054-hp-two-door-supercar-leaked\/\">carbon<\/a> footprint thresholds and recycling requirements.<\/li>\n<li>From 2026, <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cmos-battery-dead-symptoms-causes-and-fix-guide\/\">battery<\/a> information becomes available on a label, and from 2027 through a digital passport accessible via QR code.<\/li>\n<\/ul>\n<p dir=\"ltr\">In practice, 2025 is the turning point. From then on, no new model approved in the EU can skip these tests.<\/p>\n<hr \/>\n<h2 dir=\"ltr\">Conclusion<\/h2>\n<p dir=\"ltr\">The new tests for <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">electric<\/a> <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">car<\/a> batteries are a necessary step, not just a bureaucratic one. Crash safety, fast-charging behavior, and resistance to extreme temperatures become mandatory thresholds, not marketing options.<\/p>\n<p dir=\"ltr\">For <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/pc-freezes-randomly-causes-and-fix\/\">drivers<\/a>, this means real, added trust in <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/mercedes-c-class-eq-concept-redefines-electric-sedan\/\">EV<\/a> technology. For the industry, it means higher short-term costs but a more mature market long-term. For those diagnosing these vehicles daily, it means a clear technical reference instead of vague guesswork.<\/p>\n<p dir=\"ltr\">Through these rules, the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">electric<\/a> <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">car<\/a> market becomes safer and more transparent. That matters for everyone, from the manufacturer down to the mechanic working roadside.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The EU Is Cracking Down on Weak EV Batteries: What Changes From 2025 The European Union is fundamentally changing how electric car batteries get approved for sale. This is no longer left to manufacturer goodwill. Mandatory tests are coming, with clear pass-or-fail thresholds. The news lands at a moment when EV sales keep climbing across [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":22922,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[18606],"tags":[54022,54026,54032,54030,54024,54020,54028,38451,54034,54036],"class_list":["post-22925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-electric-car-batteries","tag-eu-battery-regulation","tag-ev-battery-diagnostics","tag-ev-battery-fire","tag-ev-battery-safety","tag-ev-battery-testing","tag-ev-battery-warranty","tag-solid-state-batteries","tag-un-gtr-22","tag-unece-r100"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>New EU Rules for EV Batteries Starting 2025 - Diagnoza BAM<\/title>\n<meta name=\"description\" content=\"The EU is forcing tougher battery tests on EVs from 2025. 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