{"product_id":"3s-40a-bms-board-11-1v-12-6v-18650-li-ion-protection","title":"3S 40A BMS Board – 11.1V 12.6V 18650 Li-ion Protection","description":"\u003ch2\u003e3S 40A BMS Board – Protection and Balancing for 12V 18650 Lithium Packs\u003c\/h2\u003e\n\u003cp\u003eThis 3S 40A BMS board protects a three-cell 18650 lithium-ion pack that runs at 11.1V nominal and charges to 12.6V. It guards the cells against overcharge, over-discharge and overcurrent, and its balancing function helps keep the three cells at similar voltages. The board is a bare PCB that you solder into your own pack, so it suits makers, repair technicians and small-project builders. Use it to build a safer 12V battery for LED lighting, standby electronics, small inverters and solar lamp projects. Choose cells that can supply the current your load needs.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/05_wiring_diagram.png?v=1792930425\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3S configuration:\u003c\/strong\u003e Designed for three lithium-ion or LiPo cells in series, giving 11.1V nominal and 12.6V at full charge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvercharge protection:\u003c\/strong\u003e Stops charging when a cell reaches its limit, which helps prevent damage from overcharging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-discharge protection:\u003c\/strong\u003e Disconnects the load when a cell voltage falls too low, protecting the cells from deep discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvercurrent protection:\u003c\/strong\u003e Cuts the output if the load draws too much current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell balancing:\u003c\/strong\u003e Helps keep the three cells at similar voltages. It works best when the cells are well matched.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 40A discharge rating:\u003c\/strong\u003e A high current rating for demanding loads, provided your cells and cooling can support it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolder-in installation:\u003c\/strong\u003e Connect to the pack taps at 0V, 4.2V, 8.4V and 12.6V following the wiring diagram.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eProduct Name\u003c\/th\u003e\n\u003ctd\u003e3S 40A BMS Lithium Battery Protection Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eCell Configuration\u003c\/th\u003e\n\u003ctd\u003e3S (three cells in series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eCell Type\u003c\/th\u003e\n\u003ctd\u003e3.6V \/ 3.7V lithium-ion or LiPo, such as 18650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eNominal Pack Voltage\u003c\/th\u003e\n\u003ctd\u003e11.1V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eFull-Charge Voltage\u003c\/th\u003e\n\u003ctd\u003e12.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eMaximum Discharge Current\u003c\/th\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eProtection Functions\u003c\/th\u003e\n\u003ctd\u003eOvercharge, over-discharge, overcurrent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eCell Balancing\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eConnection Points\u003c\/th\u003e\n\u003ctd\u003e0V, 4.2V, 8.4V, 12.6V taps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003eSoldering required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eThis 3S BMS board suits small 12V lithium packs built from 18650 cells. Typical uses include LED lighting, standby and backup power for electronics, small inverters and solar street lamp packs. It also suits repair work and DIY battery projects. For high-current tools such as drills, the cells must be rated to deliver the current, because the BMS only limits current and does not create it.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/09_applications.png?v=1792930457\" alt=\"\"\u003e\u003c\/div\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 3S 40A BMS protection board\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eHow many cells does this board support?\u003c\/h4\u003e\n\u003cp\u003eIt is for three lithium-ion or LiPo cells in series (3S), such as three 18650 cells. Full charge is 12.6V.\u003c\/p\u003e\n\u003ch4\u003eCan I use it with LiFePO4 batteries?\u003c\/h4\u003e\n\u003cp\u003eNo. The board is designed for lithium-ion cells that charge to 4.2V each (12.6V for the pack). LiFePO4 cells need a different BMS.\u003c\/p\u003e\n\u003ch4\u003eHow do I connect it?\u003c\/h4\u003e\n\u003cp\u003eSoldering is required. Connect the 0V, 4.2V, 8.4V and 12.6V taps exactly as shown in the wiring diagram, and check every connection before charging. For the main 0V and 12.6V leads, use copper wire rather than nickel strip.\u003c\/p\u003e\n\u003ch4\u003eCan I run a power drill from this board?\u003c\/h4\u003e\n\u003cp\u003eOnly with cells rated for high discharge current. Ordinary 18650 cells may not be able to supply high current, so check the cell datasheet first.\u003c\/p\u003e\n\u003ch4\u003eWhy does the board get warm?\u003c\/h4\u003e\n\u003cp\u003eThe balancing circuit can warm up while it evens out cell voltages, especially during the first charge. If it becomes very hot, check your wiring and reduce the load.\u003c\/p\u003e\n\u003ch3\u003eOrder from Electronics Hub Pakistan\u003c\/h3\u003e\n\u003cp\u003eLooking for a 3S 40A BMS board in Pakistan? Explore our range of BMS and Battery Management boards at \u003ca href=\"\/\"\u003eElectronics Hub\u003c\/a\u003e. Check the cell count, current rating and wiring diagram against your battery pack before ordering, and pair the board with suitable 18650 cells and a matching 12.6V charger. Order your 3S 40A BMS board today and build your 12V lithium pack with confidence.\u003c\/p\u003e","brand":"Electronics Hub","offers":[{"title":"Default Title","offer_id":67833276825913,"sku":null,"price":210.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/01_front_board_view.png?v=1792930523","url":"https:\/\/electronicshub.pk\/products\/3s-40a-bms-board-11-1v-12-6v-18650-li-ion-protection","provider":"Electronics Hub","version":"1.0","type":"link"}