{"id":653,"date":"2025-07-15T03:32:59","date_gmt":"2025-07-15T03:32:59","guid":{"rendered":"https:\/\/cnbatteries.com\/?p=653"},"modified":"2025-07-15T03:32:59","modified_gmt":"2025-07-15T03:32:59","slug":"%d0%b0%d0%ba%d0%ba%d1%83%d0%bc%d1%83%d0%bb%d1%8f%d1%82%d0%be%d1%80-vrla-%d0%b2%d1%81%d0%b5-%d1%87%d1%82%d0%be-%d0%b2%d0%b0%d0%bc-%d0%bd%d1%83%d0%b6%d0%bd%d0%be-%d0%b7%d0%bd%d0%b0%d1%82%d1%8c-%d0%be","status":"publish","type":"post","link":"https:\/\/cnbatteries.com\/ru\/vrla-battery-everything-you-need-to-know-about\/","title":{"rendered":"\u0410\u043a\u043a\u0443\u043c\u0443\u043b\u044f\u0442\u043e\u0440 VRLA - \u0432\u0441\u0435, \u0447\u0442\u043e \u043d\u0443\u0436\u043d\u043e \u0437\u043d\u0430\u0442\u044c"},"content":{"rendered":"

A Complete Guide to VRLA \u0410\u043a\u043a\u0443\u043c\u0443\u043b\u044f\u0442\u043e\u0440<\/a> – The Valve-Regulated \u0421\u0432\u0438\u043d\u0446\u043e\u0432\u043e-\u043a\u0438\u0441\u043b\u043e\u0442\u043d\u044b\u0435<\/a> \u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f \u0430\u043a\u043a\u0443\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u043e\u0432<\/em><\/p>\n

1. What Does VRLA Mean?<\/h2>\n

VRLA<\/strong> stands for Valve-Regulated Lead-Acid<\/strong> battery. It is a sealed type of lead-acid battery that uses a pressure-regulating valve system<\/strong> to control internal gas buildup.<\/p>\n

Key features:<\/p>\n

    \n
  • \n

    Sealed construction<\/strong>: The electrolyte is immobilized\u2014either absorbed in a glass fiber separator<\/strong> (AGM type) or suspended in a silica-based gel<\/strong> (GEL type).<\/p>\n<\/li>\n

  • \n

    Valve control<\/strong>: A pressure-sensitive safety valve<\/strong> on top opens to release excess gas (oxygen and hydrogen) during overpressure conditions, preventing an explosion.<\/p>\n<\/li>\n

  • \n

    Oxygen recombination cycle<\/strong>: Oxygen produced at the positive plate migrates to the negative plate and reacts with lead to form water, maintaining electrolyte balance without water loss.<\/p>\n<\/li>\n<\/ul>\n

    This design makes VRLA batteries \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u044e\u0449\u0438\u0439 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u044f<\/strong> \u0438 spill-proof<\/strong>, with no need to add water<\/strong> during their service life.<\/p>\n

    \n

    2. VRLA Battery Technology: A Brief History<\/h2>\n

    Before the 1970s, lead-acid batteries required the plates to be submerged in free-flowing sulfuric acid<\/strong>, which led to water loss during charging due to electrolysis<\/strong>.<\/p>\n

    Key milestones in VRLA technology:<\/p>\n

    \n
    \n\n\n\n\n\n\n\n
    Year<\/th>\nInnovation<\/th>\n<\/tr>\n<\/thead>\n
    1957<\/strong><\/td>\nGerman company Sonnenschein<\/strong> developed the SiO\u2082 gel-sealed lead-acid battery<\/strong>, pioneering the GEL VRLA<\/strong> \u0444\u043e\u0440\u043c\u0430\u0442.<\/td>\n<\/tr>\n
    1971<\/strong><\/td>\nGates Energy<\/strong>, USA, introduced AGM (Absorbent Glass Mat)<\/strong> separators, solving the oxygen recombination problem and improving gas control.<\/td>\n<\/tr>\n
    1973<\/strong><\/td>\nSmall-size VRLA batteries became commercially available, opening the door to UPS systems<\/strong>, telecom backup<\/strong>, \u0438 wheelchair power<\/strong> applications.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n
    <\/div>\n<\/div>\n<\/div>\n<\/div>\n

    Oxygen Recombination Reaction:<\/h3>\n

    During charging, oxygen is generated at the positive plate:<\/p>\n

    \n
    Pb<\/span> +<\/span> \u00bd O<\/span>\u2082 +<\/span> H<\/span>\u2082SO<\/span>\u2084 \u2192 PbSO<\/span>\u2084 +<\/span> H<\/span>\u2082O<\/span> +<\/span> heat<\/span>
    \n<\/code><\/div>\n<\/div>\n

    This oxygen diffuses to the negative plate, where it recombines into water, eliminating the need to refill water<\/strong> and ensuring internal pressure control.<\/p>\n

    Side Reactions:<\/h3>\n

    Despite the recombination mechanism, two side reactions still occur:<\/p>\n

      \n
    1. \n

      Hydrogen evolution (at negative plate):<\/strong>
      2H\u207a + 2e\u207b \u2192 H\u2082<\/code><\/p>\n<\/li>\n

    2. \n

      Grid corrosion (at positive plate):<\/strong>
      Pb + H\u2082O \u2192 PbO\u2082 + 4H\u207a + 4e\u207b<\/code><\/p>\n<\/li>\n<\/ol>\n

      To suppress these, manufacturers use lead-calcium alloy plates<\/strong>, which significantly reduce hydrogen evolution and improve battery life.<\/p>\n

      \n

      3. How Does a VRLA Battery Work?<\/h2>\n

      Here\u2019s a simplified schematic diagram of the VRLA battery’s internal working mechanism:<\/p>\n

      \"What<\/p>\n

      Key elements in the operation:<\/strong><\/p>\n

        \n
      • \n

        The safety valve<\/strong> regulates internal gas pressure.<\/p>\n<\/li>\n

      • \n

        O\u2082 and H\u2082<\/strong> are managed through an internal recombination system.<\/p>\n<\/li>\n

      • \n

        AGM or GEL<\/strong> holds the electrolyte in place.<\/p>\n<\/li>\n

      • \n

        Electrochemical reactions are designed to recycle water<\/strong> internally, making the system sealed and low-maintenance.<\/p>\n<\/li>\n<\/ul>\n

        \n

        4. Pros and Cons of VRLA Battery<\/h2>\n

        Comparison with Other Battery Technologies<\/em><\/p>\n

        \n
        \n\n\n\n\n\n\n\n\n\n\n\n
        Category<\/th>\nVRLA Battery<\/th>\n\u0417\u0430\u0442\u043e\u043f\u043b\u0435\u043d\u043d\u044b\u0439 \u0441\u0432\u0438\u043d\u0446\u043e\u0432\u043e-\u043a\u0438\u0441\u043b\u043e\u0442\u043d\u044b\u0439<\/th>\nLithium-ion<\/th>\nNiMH<\/th>\n<\/tr>\n<\/thead>\n
        Environmental Safety<\/strong><\/td>\n\u2705 Sealed, no spills<\/td>\n\u274c Risk of acid leaks<\/td>\n\u26a0\ufe0f High resource impact<\/td>\n\u2705 Safe<\/td>\n<\/tr>\n
        \u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0435<\/strong><\/td>\n\u2705 No water topping needed<\/td>\n\u274c Regular water checks are required<\/td>\n\u2705 No maintenance<\/td>\n\u2705 No maintenance<\/td>\n<\/tr>\n
        \u041f\u043b\u043e\u0442\u043d\u043e\u0441\u0442\u044c \u044d\u043d\u0435\u0440\u0433\u0438\u0438<\/strong><\/td>\n\u26a0\ufe0f Low to moderate<\/td>\n\u26a0\ufe0f Low<\/td>\n\u2705 High<\/td>\n\u26a0\ufe0f Moderate<\/td>\n<\/tr>\n
        \u041f\u0435\u0440\u0432\u043e\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u0430\u044f \u0441\u0442\u043e\u0438\u043c\u043e\u0441\u0442\u044c<\/strong><\/td>\n\u2705 Low to moderate<\/td>\n\u2705 Low<\/td>\n\u274c High<\/td>\n\u26a0\ufe0f Moderate<\/td>\n<\/tr>\n
        \u0426\u0438\u043a\u043b \u0436\u0438\u0437\u043d\u0438<\/strong><\/td>\n\u26a0\ufe0f Medium (200\u2013500 cycles)<\/td>\n\u26a0\ufe0f Low<\/td>\n\u2705 High (1000+ cycles)<\/td>\n\u26a0\ufe0f Medium<\/td>\n<\/tr>\n
        \u0411\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c<\/strong><\/td>\n\u2705 Very safe<\/td>\n\u26a0\ufe0f Risk of hydrogen accumulation<\/td>\n\u26a0\ufe0f Requires BMS<\/td>\n\u2705 Safe<\/td>\n<\/tr>\n
        Typical Applications<\/strong><\/td>\nUPS, telecom, wheelchairs<\/td>\n\u0410\u0432\u0442\u043e\u043c\u043e\u0431\u0438\u043b\u0438<\/td>\nEVs, solar systems<\/td>\nSmall electronics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \n
        <\/div>\n<\/div>\n<\/div>\n<\/div>\n
        \n

        5. Where Are VRLA Batteries Used?<\/h2>\n

        VRLA batteries are used across many sectors, thanks to their reliability and sealed design:<\/p>\n

          \n
        • \n

          Uninterruptible Power Supplies (UPS)<\/strong><\/p>\n<\/li>\n

        • \n

          Telecommunications base stations<\/strong><\/p>\n<\/li>\n

        • \n

          Solar and wind energy storage systems<\/strong><\/p>\n<\/li>\n

        • \n

          Emergency lighting & alarm systems<\/strong><\/p>\n<\/li>\n

        • \n

          Mobility equipment (wheelchairs, scooters)<\/strong><\/p>\n<\/li>\n

        • \n

          Forklifts and floor scrubbers<\/strong><\/p>\n<\/li>\n<\/ul>\n

          \n

          6. Final Thoughts: Why Choose VRLA?<\/h2>\n

          VRLA batteries strike an ideal balance between cost, reliability, and maintenance<\/strong>.<\/p>\n

          They are:<\/p>\n

            \n
          • \n

            \u041d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u044f<\/strong><\/p>\n<\/li>\n

          • \n

            Environmentally friendly<\/strong><\/p>\n<\/li>\n

          • \n

            Easy to install<\/strong><\/p>\n<\/li>\n

          • \n

            Safe and sealed<\/strong><\/p>\n<\/li>\n

          • \n

            Cost-effective for backup and stationary use<\/strong><\/p>\n<\/li>\n<\/ul>\n

            Although they may not offer the same cycle life or energy density as lithium-ion batteries, VRLA batteries are trusted worldwide<\/strong> for backup, storage, and off-grid power systems where safety and simplicity matter most.<\/p>\n

            \n

            References & Further Reading:<\/h2>\n
              \n
            1. \n

              Battery Council International (BCI). Lead-Acid Battery Technical Manual.<\/em><\/p>\n<\/li>\n

            2. \n

              Sonnenschein Battery Datasheets.<\/p>\n<\/li>\n

            3. \n

              Gates Energy Products. Absorbent Glass Mat (AGM) Technology Overview<\/em>, 1971.<\/p>\n<\/li>\n

            4. \n

              U.S. Department of Energy: Energy Storage Database.<\/p>\n<\/li>\n

            5. \n

              IEC 60896-21 & -22: Stationary Lead-Acid Batteries Standards<\/em>.<\/p>\n<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

              \u041f\u043e\u043b\u043d\u043e\u0435 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u043f\u043e \u0431\u0430\u0442\u0430\u0440\u0435\u044f\u043c VRLA - \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u0441\u0432\u0438\u043d\u0446\u043e\u0432\u043e-\u043a\u0438\u0441\u043b\u043e\u0442\u043d\u044b\u0445 \u0431\u0430\u0442\u0430\u0440\u0435\u0439 \u0441 \u0432\u0435\u043d\u0442\u0438\u043b\u044c\u043d\u044b\u043c \u0440\u0435\u0433\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435\u043c 1. \u0427\u0442\u043e \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442 VRLA? VRLA \u0440\u0430\u0441\u0448\u0438\u0444\u0440\u043e\u0432\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043a\u0430\u043a Valve-Regulated Lead-Acid Battery. \u042d\u0442\u043e \u0433\u0435\u0440\u043c\u0435\u0442\u0438\u0447\u043d\u044b\u0439 \u0442\u0438\u043f \u0441\u0432\u0438\u043d\u0446\u043e\u0432\u043e-\u043a\u0438\u0441\u043b\u043e\u0442\u043d\u043e\u0439 \u0431\u0430\u0442\u0430\u0440\u0435\u0438, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u043a\u043b\u0430\u043f\u0430\u043d\u043e\u0432, \u0440\u0435\u0433\u0443\u043b\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u0434\u0430\u0432\u043b\u0435\u043d\u0438\u0435, \u0434\u043b\u044f \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044f \u0437\u0430 \u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0433\u0430\u0437\u0430 \u0432\u043d\u0443\u0442\u0440\u0438. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438: \u0413\u0435\u0440\u043c\u0435\u0442\u0438\u0447\u043d\u0430\u044f \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f: \u042d\u043b\u0435\u043a\u0442\u0440\u043e\u043b\u0438\u0442 \u0438\u043c\u043c\u043e\u0431\u0438\u043b\u0438\u0437\u043e\u0432\u0430\u043d - \u043b\u0438\u0431\u043e \u0430\u0431\u0441\u043e\u0440\u0431\u0438\u0440\u043e\u0432\u0430\u043d \u0432 \u0441\u0442\u0435\u043a\u043b\u043e\u0432\u043e\u043b\u043e\u043a\u043d\u0435...<\/p>","protected":false},"author":1,"featured_media":655,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/posts\/653","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/comments?post=653"}],"version-history":[{"count":1,"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/posts\/653\/revisions"}],"predecessor-version":[{"id":656,"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/posts\/653\/revisions\/656"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/media\/655"}],"wp:attachment":[{"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/media?parent=653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/categories?post=653"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnbatteries.com\/ru\/wp-json\/wp\/v2\/tags?post=653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}