{"id":6648,"date":"2025-11-12T12:55:17","date_gmt":"2025-11-12T12:55:17","guid":{"rendered":"https:\/\/trusttronics.com\/en\/product\/bms-3s-12-6v-20a-lithium-battery-protection-module\/"},"modified":"2026-04-16T10:53:53","modified_gmt":"2026-04-16T10:53:53","slug":"bms-3s-12-6v-20a-lithium-battery-protection-module","status":"publish","type":"product","link":"https:\/\/trusttronics.com\/en\/product\/bms-3s-12-6v-20a-lithium-battery-protection-module\/","title":{"rendered":"BMS 3S (12.6V \u2013 20A ) Lithium Battery Protection Module"},"content":{"rendered":"<p>Description:<br \/>\nThe 3S 20A 12.6V Battery Management System (BMS) PCB Board is designed to protect and charge 3-series lithium-ion battery packs.<\/p>\n<p>It ensures overcharge, over-discharge, and short-circuit protection, making it an essential safety component for battery-powered applications.<\/p>\n<p>This lightweight and compact module supports 18650, 26650, and polymer lithium batteries, offering a high discharge capacity of up to 20A. Ideal for DIY battery packs, e-bikes, solar projects, and powerbanks.<\/p>\n<p>Features:<br \/>\n3S 11.1V 12.6V 20A 18650 lithium battery Management board.<br \/>\nApplication: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650.26650, a polymer lithium battery).<br \/>\nContinuous discharge current (upper limit): 20A (if the cooling environment is not good, please reduce the load current use).<br \/>\nContinuous charge current (upper limit): 20A.<br \/>\nSuitable for starting current below 40A, power 65W below the drill.<br \/>\nSpecifications:<br \/>\nCharging Voltage: 12.6V-13V<br \/>\nOvercharge Voltage Range: 4.25V-4.35V \u00b1 0.05V<br \/>\nOverpressure Voltage Range: 2.3V-3.0V \u00b1 0.05V<br \/>\nContinuous charge current (upper limit): 10A<br \/>\nMaximum discharge current is 20A<br \/>\nQuiescent Current: less than 30uA<br \/>\nInternal Resistance: less than 45mohm<br \/>\nEffective Life: more than 50,000 hours<br \/>\nOperating Temperature: -40- +50 degrees<br \/>\nStorage Conditions: -40- +80 degrees<br \/>\nContinuous discharge current (upper limit): 20A (if the cooling environment is not good, please reduce the load current use)<br \/>\nContinuous charge current (upper limit): 10A.<br \/>\nSize is approximate 59x20x3.5mm<br \/>\nPrecautions:<br \/>\nPlease strictly follow the wiring 0V (B -), 3.7V (B1), 7.4V (B2), 11.1V (B +), do not deliberately short circuit.<br \/>\nPlease charge after connecting the line, then it will have output.<br \/>\nWhen connecting three groups of batteries, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use in series. Discharge test, the voltage drops quickly when the group of battery time difference battery.<br \/>\nPlease do not mix the battery and the poor battery together! 3 sets of battery capacity\/resistance closer to the better! (Two good batteries +1 a poor battery use effect = 3 poor battery use effect).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Description: The 3S 20A 12.6V Battery Management System (BMS) PCB Board is designed to protect and charge 3-series lithium-ion battery packs. It ensures overcharge, over-discharge, and short-circuit protection, making it an essential safety component for battery-powered applications. This lightweight and compact module supports 18650, 26650, and polymer lithium batteries, offering a high discharge capacity of [&hellip;]<\/p>\n","protected":false},"featured_media":6647,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[25,28],"product_tag":[],"class_list":{"0":"post-6648","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-arduino-development-boards","7":"product_cat-batteries","8":"desktop-align-center","9":"tablet-align-center","10":"mobile-align-center","12":"first","13":"instock","14":"sale","15":"shipping-taxable","16":"purchasable","17":"product-type-simple"},"aioseo_notices":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/product\/6648","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/comments?post=6648"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/media\/6647"}],"wp:attachment":[{"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/media?parent=6648"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/product_brand?post=6648"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/product_cat?post=6648"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/trusttronics.com\/en\/wp-json\/wp\/v2\/product_tag?post=6648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}