Smart 3s 4s 10A 20A 30A 12V 14.4V BMS PCB PCBA with APP Support and Bluetooth

 Product ParametersModeLWS-4S30A-921PCM SizeL90mm*W55mm*T9.6mmbattery series4S Availableworking current20AvailableUsage(Cell Type)LiFePO4 battery packs (12.8V/cell)ApplicationEbike, Solar products, etcSampleavailable   LWS-4S30A-921 (4S20A)  for LiFePo battery pack of  4  cells in series is a battery protection solution of LWS's, can support a load with very stable, in addition that the continuous current may be up to  20A .Features IntroducedProvides protection for 4 series LiFePo battery packProvides protections in charging and dischargingProcesses the balance between cells smartly, the current of it can be set freely by external components.Deals with over-current and short-circuit protection with circuit itselfProtect an electrical circuit from damage caused by over current/ over load or short circuitSupport bluetooth protocolProduct Picture Specification       Test itemDescriptionCriterionVoltageCharging voltageDC:14.4V CC/CVBalance voltage for single cell3.20±0.025VcCurrentBalance current for single cell50±20mACurrent consumption (sleeping)≤250uACurrent consumption(working)≤10mAMaximal continuous discharging current≤20AMaximal discharging current (time)NoneOver charge ProtectionOver charge detection voltage for single cell3.75±0.025VOver charge detection delay time0.5~1.5SOver charge release voltage for single cell3.5±0.05VOver discharge protectionOver discharge detection voltage for single cell2.60±0.05VOver discharge detection delay time500~1500mSOver discharge release voltage for single cell2.8±0.10VOver current protectionOver discharge current protection50±10ADetection delay time 1500~1500mSDetection delay time 2500~1500mSOvercharge current protects current30±5ADetection delay time500~1500mSShort circuit protectionShort circuit protection current/Detection delay time50~800uSProtection conditionExterior short circuitRelease conditionCut load,Auto recoveryCharge high temperature protection55±5ºCCharge low temperature protection0ºCDischarge high temperature protection60±5ºCDischarge low temperature protection-20±5ºC/Release conditionThe temperature drops to 50ºC, charge releaseOperating temperature range-20~+60ºCStorage temperature range-20~+60ºCResistanceThe on-state resistance of the main circuit≤5mΩBreak circuit protectionDisconnect the voltage sampling circuit to turn off the charge and dischargeSupportNTC ProtectionThermistor temperature protectionSupportElectronic switchElectronic switchSupportReverse polarity protection Nonsupport  Electric Switch, Temperature Switch, Passive Balance, Active Balance, 5V output, NTC,bluetooth UART/BT/RS485/CAN communication/LCD dispay and etc., if you need any above accessories, please must to contact our sales fisrt. All items could be customized to your requirements,if without any requests after order placed, we will produce as specification in details page.  Product advantage About LWS     Shenzhen Li-ion Battery Bodyguard Technology Co.,Ltd was founded in 2013. We provide Battery PCM &BMS for Lithium ion,LiFePo4,LTO battery pack and ODM & OEM services.Since established, we have designed more than 900 types of hardware PCM/BMS, and software BMS including HDQ/12C/SMBUS/ RS485/RS232 & Bluetooth and so on. Mainly covers battery assembly 1S-35S in series, working current up to 350A; the products arewidely used in light ,power tool, electric bicycle,medical equipment, EV application ....etc. Li-ion Battery Bodyguard Technology Co., Ltd has passed ISO 9001(2015) certification.We were also awarded High Technology Expertise (HNTE) in 2018.   The spirit of "honesty, credibility first" business principle, fast delivery time, competitive price ,high-quality products & services have got us many customer's affirmation.And because of that, our products have been sold to not only Germany, France, the United States, Australia, India, South Korea, Japan but also other countries and regions.    As a professional BMS designer and manufacturer, we are willing to support, help every client to open new markets and extend new business. Meet us, Meet reliablility, Meet our mutual development!   Packaging & shipping:        Delivery type:by air such as TNT,UPS,FEDEX or by sea ,just depend on your convenient.        Payment:L/C,T/T,Western Union,PAYPAL etc.Warranty:   The warranty period of this product is 12 months, during which, any damage under normal usage should be within the warranty service scope by Shenzhen Li-ion Battery Bodyguard Technology Co., LTD. Any damages caused by below abnormal conditions is not covered by the Warranty policy.(1) Incorrect operation or use(2) Use of environmental conditions exceeds the specifications(3) Unauthorized disassembly and maintenance(4) Caused by human sabotage(5) Water or dampness FAQQ: How do I judge what material my battery is ?A: Please take a look at the battery body.if the normal voltage of your battery shows as 3.2V,the battery will be LiFePo4.If the normal voltage of your battery shows as 3.6V or 3.7V, the battery will be Li-ion or