{"product_id":"src-jk-2719-jkbms-b2a25srp-7s-25s-active-balance-bms-balance-current-2a-split-port-bms-need-relay-lifepo4-li-ion-lto-battery","title":"JKBMS B2A25SRP 7S-25S Active Balance Smart BMS 2A Split Port w\/ Bluetooth RS485\/CAN for LiFePO4","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe \u003ca href=\"https:\/\/tsolar.top\/collections\/jkbms-jikong-bms\" title=\"JKBMS - JIKONG BMS\"\u003eJKBMS\u003c\/a\u003e B2A25SRP is an active balance \u003ca href=\"https:\/\/tsolar.top\/collections\/smart-bms\" title=\"Smart BMS\"\u003esmart BMS\u003c\/a\u003e for lithium battery packs (Li-ion \/ LiFePO4 \/ LTO). It supports a 7S to 25S battery string range (chemistry-dependent), built-in Bluetooth for Android\/iOS monitoring, and split-port wiring output. The battery pack is self-powered, and charge\/discharge current is controlled via an external relay (“Need Relay”).\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive balancing:\u003c\/strong\u003e 2000 mA (2 A), Active Balance (Full State On)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery strings supported:\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eLi-ion: 7S-25S\u003c\/li\u003e\n\u003cli\u003eLiFePO4: 8S-25S\u003c\/li\u003e\n\u003cli\u003eLTO: 12S-25S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring output:\u003c\/strong\u003e Split Port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply mode:\u003c\/strong\u003e Battery pack self-powered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell voltage sensing:\u003c\/strong\u003e single cell voltage detection range 0-5 V; single cell voltage range 1-5 V; voltage acquisition accuracy ±5 mV; typical error \u0026lt;5 mV, error \u0026lt;10 mV over full operating range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal voltage detection:\u003c\/strong\u003e 0-100 V, \u0026lt;0.5% FSR (FSR = full scale)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent sensing (shunt):\u003c\/strong\u003e -150 A to 300 A, error \u0026lt;0.5% FSR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtections\/functions listed:\u003c\/strong\u003e short circuit protection; over temperature protection; coulomb counter; support single cell voltage dropout detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e built-in; supports Android \/ iOS phone (use the specified Bluetooth application; search the relevant serial number to view data)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommunications:\u003c\/strong\u003e RS485\/CANBUS (default); CANBUS\/HEAT (customized)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable settings (as listed):\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eOver charge protection voltage: 1.2-4.35 V adjustable\u003c\/li\u003e\n\u003cli\u003eOver charge release voltage: 1.2-4.35 V adjustable\u003c\/li\u003e\n\u003cli\u003eOver discharge protection voltage: 1.2-4.35 V adjustable\u003c\/li\u003e\n\u003cli\u003eOver discharge release voltage: 1.2-4.35 V adjustable\u003c\/li\u003e\n\u003cli\u003eOver current detect delay: 2-120 S adjustable\u003c\/li\u003e\n\u003cli\u003eOver charge protection current (ADJ): 10-1000 A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating power consumption:\u003c\/strong\u003e \u0026lt;5 mA (without communication) \/ 15 mA (485\/CAN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandby power consumption:\u003c\/strong\u003e \u0026lt;2 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoC \/ capacity estimation:\u003c\/strong\u003e SoC estimation accuracy error \u0026lt;8% (operating conditions); battery remaining capacity error range \u0026lt;8%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal cycle AH rule (as stated):\u003c\/strong\u003e cumulative value is half of the charge\/discharge value\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature ranges (as listed):\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eTemperature detection: -40 to 1256C\u003c\/li\u003e\n\u003cli\u003eOperating temperature: -40 to 856C\u003c\/li\u003e\n\u003cli\u003eStoring temperature: -40 to 956C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature sensors:\u003c\/strong\u003e 3 pcs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix security protection (as listed):\u003c\/strong\u003e over charge protection; short circuit protection; over discharge protection; over current protection; all-in protection (cable drop\/poor contact); over temp protection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eB2A25SRP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery chemistry support\u003c\/td\u003e\n\u003ctd\u003eLi-ion \/ LiFePO4 \/ LTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of battery strings (Li-ion)\u003c\/td\u003e\n\u003ctd\u003e7S-25S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of battery strings (LiFePO4)\u003c\/td\u003e\n\u003ctd\u003e8S-25S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of battery strings (LTO)\u003c\/td\u003e\n\u003ctd\u003e12S-25S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalance method\u003c\/td\u003e\n\u003ctd\u003eActive Balance (Full State On)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalance current\u003c\/td\u003e\n\u003ctd\u003e2 A (2000 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous charge current\u003c\/td\u003e\n\u003ctd\u003eRelay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous discharge current\u003c\/td\u003e\n\u003ctd\u003eRelay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum discharge current (MAX 2 min)\u003c\/td\u003e\n\u003ctd\u003eRelay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring output\u003c\/td\u003e\n\u003ctd\u003eSplit Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply mode\u003c\/td\u003e\n\u003ctd\u003eBattery pack self-powered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle cell voltage detection range\u003c\/td\u003e\n\u003ctd\u003e0-5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle cell voltage range\u003c\/td\u003e\n\u003ctd\u003e1-5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage acquisition accuracy\u003c\/td\u003e\n\u003ctd\u003e15 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal voltage detection range\u003c\/td\u003e\n\u003ctd\u003e0-100 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal voltage detection accuracy\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5% FSR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent sense shunt range\u003c\/td\u003e\n\u003ctd\u003e-150 A to 300 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent sense error\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5% FSR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver charge protection current (ADJ)\u003c\/td\u003e\n\u003ctd\u003e10-1000 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver charge protection voltage\u003c\/td\u003e\n\u003ctd\u003e1.2-4.35 V adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver charge release voltage\u003c\/td\u003e\n\u003ctd\u003e1.2-4.35 V adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver discharge protection voltage\u003c\/td\u003e\n\u003ctd\u003e1.2-4.35 V adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver discharge release voltage\u003c\/td\u003e\n\u003ctd\u003e1.2-4.35 V adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver current detect delay\u003c\/td\u003e\n\u003ctd\u003e2-120 S adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature sensors\u003c\/td\u003e\n\u003ctd\u003e3 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature detection\u003c\/td\u003e\n\u003ctd\u003e-40 to 1256C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 856C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStoring temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 956C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating power consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;5 mA (no comm) \/ 15 mA (485\/CAN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandby power consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eBuilt-in; Android \/ iOS supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther interfaces (default)\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CANBUS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther interfaces (customized)\u003c\/td\u003e\n\u003ctd\u003eCANBUS \/ HEAT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e189*94*24 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eInterface\/Pin Labels (from labeled diagram)\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCANBUS (need customization):\u003c\/strong\u003e GND, CAN_H, CAN_L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRS485 (by default):\u003c\/strong\u003e GND, RX, TX, VCC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLCD (by default):\u003c\/strong\u003e K-, K+, GND, B, A, VCC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Function (need customization):\u003c\/strong\u003e (connector labeled “Heat Function”)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSmart Working Mode Switching (as described)\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Mode:\u003c\/strong\u003e in transportation\/storage\/offline or wireless transmission off mode, the BMS is in storage mode and does not consume battery pack current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNormal Working Mode:\u003c\/strong\u003e when the charger is inserted in storage\/off mode, the BMS returns immediately to normal working mode and protection\/equalization\/communication functions return to normal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandby Mode:\u003c\/strong\u003e when the pack is static (no charge\/discharge current and no equilibrium current), the BMS automatically enters standby after the set time (1-30 days can be set).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShutdown:\u003c\/strong\u003e the BMS has an automatic shutdown voltage and automatically shuts down when a cell falls below the shutdown voltage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNotes\u003c\/h2\u003e\u003cp\u003eThis BMS is specified as “Need Relay” for continuous charge\/discharge current control. For selection help and installation guidance, contact support at \u003ca href=\"https:\/\/tsolar.top\/\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ehttps:\/\/tsolar.top\/\u003c\/a\u003e or email \u003ca href=\"mailto:service@tsolar.top\"\u003eservice@tsolar.top\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eSome provided images include additional JK BMS model labels and accessory drawings (e.g., shunt dimension sketches and cable\/NTC length callouts). Only the specifications listed above are used for the B2A25SRP where explicitly stated.\u003c\/p\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"JKBMS active balance BMS kit with shunt, wiring harness, NTC lead and enclosure dimensions (234×144×32 mm)\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A.jpg?v=1780129586\"\u003e\u003cp\u003eIncludes the \u003ca href=\"https:\/\/tsolar.top\/collections\/battery-bms\" title=\"Battery BMS\"\u003eBMS\u003c\/a\u003e unit plus a shunt, wiring harness, and temperature lead; enclosure size is listed for fit checks before installation.\u003c\/p\u003e\n\u003cimg alt=\"JK Smart Active Balance BMS variant graphic listing supported cell strings and 0.6A balancing (series reference image)\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_ef912a59-2545-45a3-9a8e-2bca0b1de608.jpg?v=1780129596\"\u003e\u003cp\u003eOther variants in the JK Smart Active Balance series are available for different string counts and balancing current needs.\u003c\/p\u003e\n\u003cimg alt=\"JK BMS variant graphic with 2A active balancing, 7S–20S support and RS485\/CANBUS text (series reference image)\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_f02e0189-bed6-49bf-aec2-d7de208c71fb.jpg?v=1780129607\"\u003e\u003cp\u003eChoose the model that matches your pack’s series count and communications requirements (RS485\/CAN options depend on version).\u003c\/p\u003e\n\u003cimg alt=\"Exploded internal view of the BMS enclosure showing PCB, connectors and internal components layout\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A.png?v=1780129618\"\u003e\u003cp\u003eA compact, enclosed design with internal connectors and electronics arranged for a clean, serviceable wiring layout.\u003c\/p\u003e\n\u003cimg alt=\"BMS connector pinout close-up for CAN\/RS485, GPS, LCD and heat-function headers with labeled pins\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_2265d4f5-46e2-4f14-b424-7a8d1f06d258.jpg?v=1780129627\"\u003e\u003cp\u003eConnector labels help with wiring CAN\/RS485 and optional accessories such as an LCD or heating function (where supported).\u003c\/p\u003e\n\u003cimg alt=\"Bluetooth phone app monitoring screen showing pack voltage, current, balance status and per-cell voltages\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_6f255648-1e6b-4fc2-a8c1-feebe46b6773.jpg?v=1780129638\"\u003e\u003cp\u003eBuilt-in Bluetooth monitoring displays pack voltage, current, balance activity, and individual cell readings in the mobile app.\u003c\/p\u003e\n\u003cimg alt=\"Screenshots of JK BMS Bluetooth app: device scan list, settings and real-time cell voltage dashboard\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_e269d6ee-fc5a-4c8d-ac4e-a905f5a2bdb9.jpg?v=1780129650\"\u003e\u003cp\u003eApp menus cover device scanning, basic settings, and a full cell-by-cell dashboard for quick health checks.\u003c\/p\u003e\n\u003cimg alt=\"Six security protection infographic: overcharge, short circuit, overdischarge, overcurrent, all-in and over-temp protection\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_57865826-db3f-4b61-bf24-4acbed1b57e5.jpg?v=1780129662\"\u003e\u003cp\u003eMultiple protection features are provided, including over\/under-voltage, over-current, short-circuit, poor-contact, and over-temp safeguards.\u003c\/p\u003e\n\u003cimg alt=\"Smart energy working mode switching chart: storage mode, normal working mode, standby mode and shutdown logic\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_a77973e1-164a-4786-b06c-e5c7b036d171.jpg?v=1780129673\"\u003e\u003cp\u003eEnergy modes support storage\/standby behavior and automatic shutdown logic to reduce battery drain during long idle periods.\u003c\/p\u003e\n\u003cimg alt=\"Specification comparison table for JK BMS models listing string counts, balancing current, interfaces, dimensions and sensors\" loading=\"lazy\" src=\"https:\/\/tsolar.top\/cdn\/shop\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A_8b14fcbc-a3d1-42b8-a9da-4f369b985a40.jpg?v=1780129685\"\u003e\u003cp\u003eA quick comparison chart helps confirm the correct model by string range, balancing current, interface type, and physical size.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"JIKONG","offers":[{"title":"Default Title","offer_id":52312426905874,"sku":"jk-2719-","price":157.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0863\/2860\/6994\/files\/JKBMS-B2A25SRP-7S-25S-Active-Balance-BMS-Balance-Current-2A-Split-Port-BMS-Need-Relay-Lifepo4-li-ion-LTO-Battery-5.jpg?v=1780069913","url":"https:\/\/tsolar.top\/products\/src-jk-2719-jkbms-b2a25srp-7s-25s-active-balance-bms-balance-current-2a-split-port-bms-need-relay-lifepo4-li-ion-lto-battery","provider":"TSolar","version":"1.0","type":"link"}