Product Name: Li-ion 3s 12V 20A Lithium Battery Protection Board with Balance PCM BMS Model NO.: Daly 3S BMS Accessory Type: Battery Accessories Applications: 3.7V Lithium Battery Rated Battery Series: 3s Over Charge Protection: Yes Over Discharge Voltage: Yes Short Circuit Protection: Yes with Heat Sink: Yes base Material: Glass Fiber Surface Finishing: Oxidation Continuous Discharging Current: 25A Peak Discharging Current: 50A Application: Energy Storage System Feature: Waterproof Usage: Li-ion, Lipo Battery Pack Trademark: Daly Transport Package: Standard Express Packing Origin: China HS Code: 85079090 Product Description Li-ion 3S 12V 20A Lithium Battery Protection Board with balance PCM BMSWe can customize any BMS from 1S to 32S lithium batteries with current 10A to 250A.Our advantages:1> Use top qualit (A-level) protective integrated circuit IC, from the solution of Seiko of Japan.2> Strong load ability, constant discharge current 10A~250A ,use high voltage resistance, low inner resistance power Mosfet. The heat sink will greatly help cooling.3> IC itself has power balancing function. The circuit is simple and reliable.4> Typical voltage detection for each cell. So each battery will be prevented over charged or over discharged. Over current and short circuit protection function is very reliable. long time short circuit of the load won't affect the PCB and the battery.Temperature protection during charging and discharging.5> Extreme low power consumption. the consumption of the whole device is less than 50uA.6> PCB use high anti-corrosion, high water resistance, high impedance ESD conformal coating.Specification as below:3S 12.6VDetailSpecDischargeMaximal Continuous Discharging Current10A15A25A35A45A60APeak Discharging Current30A50A60A100A180A180AOver Current Protection Current30A50A60A100A180A180AChargeCharging Voltage12.6VCharging Current10A15A25A35A45A60AOver charge protectionOver Charge Detection Voltage4.25±0.025VOver Charge Detection Delay Time0.5SOver Charger Release Voltage4.19±0.05VCell balancingCell balancing Detection Voltage4.18VCell balancing Release Voltage4.18VCell balancing Current35±5mAOver discharge protectionOver Discharge Detection Voltage2.8±0.05VOver Discharge Detection Delay Time0.5SOver Discharger Release Voltage3.0±0.05VOver current protectionOver Current Detection Voltage150mVOver Current Detection Delay Time9MSOver Current Protection ConditionDisconnect the loadShort ProtectionDetection ConditionExterior Short CurcuitDetection Delay Time250uSRelease ConditionDisconnect the loadTemperature Protection65 degree or 75 degreeoptionalInternal ResistanceMOSPET≤10mΩExhibitionFAQQ: How do Iknow what material OR type my battery is ?A: Please look the battery body,if the normal voltage of your battery shows 3.2V,thebattery isLiFePo4.If the normal voltage of your battery shows 3.6V or 3.7V, the battery is Li-ion or Li-polymer battery,Youcan also ask battery manufacturer for the material of battery.Q: Is this BMSsuit for my battery?A: This BMS suit your battery or not depends on below 2points:How many series you cell is in your batterypack? The BMS you buy must be same series as your battery pack.What materialyour battery is? only the LiFePo4 battery has different electric parameter from other battery, so if you need buy the BMS for LiFePo4, Please let us know firstly.Q: What is the Common port and Separate port? what is the difference?A:We take 13S48V16A BMS asexample:Common port 16A means your charge cathode and discharge cathode are connected in the same point end(our P-), charge cathode and discharge cathode are used in the common connection port, so the charge current and discharge current are same as 16A.Separate port is separately connected by charge cathode (our C-) and discharge cathode (our P-), so the charge current and discharge current are different, discharge current is 16A, charge current is 8A.Q: What is the balance function?Do we need cell balance or not?A:The working principle and function are as followings:When your one cell voltage was reached balance voltage(Li-ion4.18V, LifePo4 3.6V), that cell balance start work, balance resistance starts discharge with 35mA, that cell was in both charging and discharging status, and other cellswere not reached balance voltage(Li-ion 4.18V, Life Po43.6V), so they are only in charging status, when the fast cell voltage was reached overcharge voltage (Li-ion4.25V, Life Po43.75V),BMS starts off power protection, all the cells are stop charging, this process will enable your battery charging in balance current, and your battery voltage are in balance status.However,if your cell voltage difference are in abig range, The equilibrium effect is almost zero,The solution is to replace cells with large voltage gaps.Q: The relationship between battery capacity(AH or mAH) and BMS current(A)?A:Thereis nodirect relationship between battery capacity and BMS current, big capacity doesn't meanbig current, but rely on continue current, that is to say if yourengine is powerful, you should choose high current of BMS, it is not relied on battery capacity.Q: What type of charger should ichoose?A: Lithium battery must choose specific charger, don't use charger for leadacid battery, for leadacid charger may have MOS with high pressure breakdown protection, which will not protect of BMS over charge. LiFePo4 battery chargervoltage= numberof battery stringsX3.6V, while Li-ion battery charger voltage= numberof battery stringsX4.2V.Q: What current BMS should Ichoose ?A: Take 10S36V as example:What current BMS you choose is depend on your E-bicycle motor power and current limitation of controller,eg.16A for 350W and below, 25A for 500W and below, 35A for 800W and below, 60A for1000W and below, over 1200W are contact with our service specialist forsuggestion,continue current shall be higher than current limitation in controller.Q: Do you have Minimum Order Requirement (MOQ)?A: No, we don't have MOQ. different customer have different requirement ,we can provide various capacity and sizeas per your requirements, also ODM /OEM is welcome.Q: What is your term of payment?A: PayPal, T/T, L/C,Western Union and so on, everything can be talk.Q: How to contact for BMS?A: Please send messagesand we are always glad to help you with BMS.