{"product_id":"jkbms-active-balance-bms-for-engine-starting-2500a-peak-starting-current-jk-qb2a8s-20p-series","title":"JKBMS Active Balance BMS for Engine Starting | 2500A Peak Starting Current | JK-QB2A8S-20P Series","description":"\u003ch2\u003eJKBMS JK-QB2A8S-20P Series — Active Balance Starting BMS\u003c\/h2\u003e\n\u003cp\u003eThe JKBMS JK-QB2A8S-20P is a high-performance active balancing Battery Management System engineered for \u003cstrong\u003eengine starting and cranking applications\u003c\/strong\u003e. Supporting lithium battery packs (Li-Ion, LiFePO4, LTO), it delivers an exceptional \u003cstrong\u003e2500A maximum starting current\u003c\/strong\u003e with 200A continuous charge\/discharge capability — making it ideal for heavy-duty vehicles, marine engines, industrial equipment, and backup starting systems.\u003c\/p\u003e\n\n\u003ch3\u003e🔋 Why Choose Active Balance for Starting Applications?\u003c\/h3\u003e\n\u003cp\u003eStarting batteries demand instant, high-current delivery. Active balancing ensures all cells remain at equal voltage, maximizing the available peak current and extending battery pack lifespan — critical when a reliable cold-crank is non-negotiable.\u003c\/p\u003e\n\n\u003ch3\u003e⚡ Key Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2500A max starting current\u003c\/strong\u003e — engineered for high-demand cranking loads\u003c\/li\u003e\n\u003cli\u003e400A instantaneous current | 200A continuous charge \u0026amp; discharge\u003c\/li\u003e\n\u003cli\u003eActive balancing up to 2A — maintains cell consistency for reliable starts\u003c\/li\u003e\n\u003cli\u003eCompatible with Li-Ion, LiFePO4, and LTO chemistries\u003c\/li\u003e\n\u003cli\u003eBluetooth + UART communication (standard)\u003c\/li\u003e\n\u003cli\u003eWide operating temperature: -30°C to 70°C — reliable cold-weather starting\u003c\/li\u003e\n\u003cli\u003eCompact: 227 × 120 × 21.12 mm | 620g\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔌 Compatible Battery Configurations\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery Type\u003c\/th\u003e\n\u003cth\u003eSupported Cell Strings\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTernary Lithium (Li-Ion \/ NMC)\u003c\/td\u003e\n\u003ctd\u003e3–8S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLithium Iron Phosphate (LiFePO4)\u003c\/td\u003e\n\u003ctd\u003e3–8S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLithium Titanate (LTO)\u003c\/td\u003e\n\u003ctd\u003e7–8S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e📡 Model Variants (Communication Options)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eCommunication\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eJK-QB2A8S-20P\u003c\/td\u003e\n\u003ctd\u003eStandard (Bluetooth + UART)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJK-QB2A8S-20PC\u003c\/td\u003e\n\u003ctd\u003eStandard + CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJK-QB2A8S-20PR\u003c\/td\u003e\n\u003ctd\u003eStandard + RS485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJK-QB2A8S-20PCR\u003c\/td\u003e\n\u003ctd\u003eStandard + CAN + RS485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e⚙️ Basic Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003cth\u003eUnit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e7.5–40\u003c\/td\u003e\n\u003ctd\u003eV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Power Consumption\u003c\/td\u003e\n\u003ctd\u003e1000–1400\u003c\/td\u003e\n\u003ctd\u003emW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-30 to 70\u003c\/td\u003e\n\u003ctd\u003e°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Balancing Current\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Discharge Current\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Instantaneous Current\u003c\/td\u003e\n\u003ctd\u003e400\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Starting Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e2500\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Internal Loop Resistance\u003c\/td\u003e\n\u003ctd\u003e0.3\u003c\/td\u003e\n\u003ctd\u003emΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e227 × 120 × 21.12\u003c\/td\u003e\n\u003ctd\u003emm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e620\u003c\/td\u003e\n\u003ctd\u003eg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e🔒 Protection Parameters\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProtection\u003c\/th\u003e\n\u003cth\u003eLi-Ion\u003c\/th\u003e\n\u003cth\u003eLiFePO4\u003c\/th\u003e\n\u003cth\u003eLTO\u003c\/th\u003e\n\u003cth\u003eUnit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOvercharge Voltage\u003c\/td\u003e\n\u003ctd\u003e4.2\u003c\/td\u003e\n\u003ctd\u003e3.6\u003c\/td\u003e\n\u003ctd\u003e2.7\u003c\/td\u003e\n\u003ctd\u003eV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUndervoltage Protection\u003c\/td\u003e\n\u003ctd\u003e2.82\u003c\/td\u003e\n\u003ctd\u003e2.6\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003ctd\u003eV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging OTP\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge OTP\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMOS OTP\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShort Circuit Protection Delay\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eμS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eManufactured by Chengdu Jikong Technology Co., LTD. Sold and supported by JKBMS.\u003c\/em\u003e\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"JK-QB2A8S-20P","offer_id":49199365685386,"sku":"JK-QB2A8S-20P-1","price":106.95,"currency_code":"EUR","in_stock":true},{"title":"JK-QB2A8S-20PCR","offer_id":49199365718154,"sku":"JK-QB2A8S-20P-2","price":116.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/JKBMS_JK-QB2A8S-20P_Active_Balance_Starting_BMS_Main_Product_Image.jpg?v=1778179511","url":"https:\/\/jkbms-ess.com\/en-eu\/products\/jkbms-active-balance-bms-for-engine-starting-2500a-peak-starting-current-jk-qb2a8s-20p-series","provider":"JKBMS-ESS","version":"1.0","type":"link"}