{"product_id":"4s-100a-bms-lithium-ion-battery-protection-board-with-cell-balancing-14-8v-16-8v","title":"4S 100A BMS Lithium-Ion Battery Protection Board with Cell Balancing (14.8V \/ 16.8V)","description":"\u003cp data-path-to-node=\"5\"\u003eBuilding a high-performance 4-cell series pack demands robust engineering, and the \u003cb data-path-to-node=\"5\" data-index-in-node=\"83\"\u003e4S 100A BMS Protection Board\u003c\/b\u003e is the ultimate command center for your custom power storage. Designed specifically for four-cell (4S) Lithium-Ion (3.7V nominal \/ 4.2V max per cell) configurations—such as 18650 or 21700 arrays—this board actively safeguards your equipment from the severe risks of overcharging, deep discharging, and localized thermal issues.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eEquipped with a thick, integrated aluminum heatsink, this board safely manages up to 100 Amps of continuous current. Crucially, it features an advanced \u003cb data-path-to-node=\"6\" data-index-in-node=\"152\"\u003eactive cell balancing\u003c\/b\u003e architecture. Because minor manufacturing differences cause series-connected batteries to drift apart over time, the onboard balancing circuit identifies cells with higher voltage during charging and bleeds off excess energy through precision surface-mount resistors. This keeps all four cells tightly matched, maximizing your pack’s usable runtime and extending its total cycle life.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eKey Features \u0026amp; Functional Advantages:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eHeavy-Duty 100A Continuous Rating:\u003c\/b\u003e Built with ultra-low internal resistance MOSFETs to handle continuous industrial loads up to 100A, eliminating severe voltage drops during heavy electrical demands.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eIntegrated Aluminum Heatsink:\u003c\/b\u003e Features a pre-mounted solid metal thermal dissipation block that keeps the power components cool and reliable under high current draws.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003ePrecision Cell Balancing:\u003c\/b\u003e Automatically monitors individual cell tracking during the charging phase, ensuring each series tier cuts off perfectly at 4.2V to capture 100% of the pack’s true storage potential.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eComprehensive 4-Tier Safety Suite:\u003c\/b\u003e Features instant automatic hardware cut-offs for over-charge voltage, deep over-discharge voltage, short-circuit protection, and over-current faults.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eFlexible Split\/Same Port Wiring:\u003c\/b\u003e Designed to accommodate both separate-port configurations (charging through one set of leads, discharging through another) and same-port configurations depending on your specific system architecture.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003ePerfect For:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eInverter \u0026amp; Solar Storage Banks:\u003c\/b\u003e Build highly reliable, portable 12V-class power stations (yielding roughly 14.8V nominal) to backup local communication links and remote infrastructure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eHeavy-Duty Robotics \u0026amp; EV Prototyping:\u003c\/b\u003e Supply robust, unthrottled current to heavy-duty motor drivers, planetary gearboxes, and large autonomous rovers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eHigh-Capacity Power Banks:\u003c\/b\u003e Create custom, rugged field enclosures capable of rapidly powering multiple USB-C devices, laptops, or field testing rigs away from standard mains.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003ePower Tool Upgrades:\u003c\/b\u003e The ultimate replacement pack brain for repairing or expanding heavy industrial equipment and custom high-torque power tools.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eConfiguration:\u003c\/b\u003e 4S (4 Cells in Series)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eSupported Chemistry:\u003c\/b\u003e Lithium-Ion (18650, 21700, 32650, etc.) with 3.7V nominal \/ 4.2V peak rating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eNominal Voltage:\u003c\/b\u003e 14.8V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eFull Charge Voltage:\u003c\/b\u003e 16.8V (Requires a dedicated 16.8V CC\/CV lithium charger)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,4,0\"\u003e\u003cb data-path-to-node=\"12,4,0\" data-index-in-node=\"0\"\u003eMaximum Continuous Current:\u003c\/b\u003e 100A (With adequate airflow\/cooling)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,5,0\"\u003e\u003cb data-path-to-node=\"12,5,0\" data-index-in-node=\"0\"\u003eOvercharge Protection Threshold:\u003c\/b\u003e 4.25V ±0.05V per cell\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,6,0\"\u003e\u003cb data-path-to-node=\"12,6,0\" data-index-in-node=\"0\"\u003eOver-Discharge Cut-off Threshold:\u003c\/b\u003e 2.5V ±0.08V per cell\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,7,0\"\u003e\u003cb data-path-to-node=\"12,7,0\" data-index-in-node=\"0\"\u003eBalancing Current:\u003c\/b\u003e ~40mA to 60mA per cell\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,8,0\"\u003e\u003cb data-path-to-node=\"12,8,0\" data-index-in-node=\"0\"\u003eShort Circuit Recovery:\u003c\/b\u003e Automatic tracking after the load disconnection\/fault removal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,9,0\"\u003e\u003cb data-path-to-node=\"12,9,0\" data-index-in-node=\"0\"\u003eBoard Dimensions:\u003c\/b\u003e Approx. 80 mm x 60 mm x 12 mm (Including heatsink)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42853817057351,"sku":null,"price":1000.0,"currency_code":"KES","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/4s_100a_lifepo4_bms_lithium_battery_management_system-1.jpg?v=1780779214","url":"https:\/\/www.ktechnics.com\/products\/4s-100a-bms-lithium-ion-battery-protection-board-with-cell-balancing-14-8v-16-8v","provider":"K-TECHNICS","version":"1.0","type":"link"}