{"title":"Relay BMS","description":"\u003cp\u003eThe \u003cstrong\u003eJKBMS Relay BMS Series\u003c\/strong\u003e is engineered for large-capacity lithium battery packs that demand reliable external relay control. Designed for 3S to 25S configurations, these relay-type BMS units deliver precise charge, discharge, and pre-charge relay switching (12V drive), combined with \u003cstrong\u003e2A active cell balancing\u003c\/strong\u003e via supercapacitor energy transfer technology.\u003c\/p\u003e\u003cp\u003eBuilt for professionals and system integrators, the Relay BMS series supports all mainstream lithium chemistries — LiFePO4, Li-ion (NMC), and LTO — and features built-in Bluetooth for real-time monitoring via the JKBMS App, with optional RS485 and CAN interfaces for industrial integration.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e⚡ Relay-type output: charge \/ discharge \/ pre-charge control (12V drive)\u003c\/li\u003e\n\u003cli\u003e🔋 Supports LiFePO4, Li-ion (NMC), LTO battery chemistries\u003c\/li\u003e\n\u003cli\u003e⚖️ 2A active balancing — supercapacitor-based energy transfer\u003c\/li\u003e\n\u003cli\u003e📡 Bluetooth built-in + optional RS485 \u0026amp; CAN interfaces\u003c\/li\u003e\n\u003cli\u003e🌡️ 3× NTC temperature probes + heating control support\u003c\/li\u003e\n\u003cli\u003e🔧 Configurable via JKBMS App (Android \u0026amp; iOS)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIdeal for solar ESS, industrial backup power, electric vehicles, forklifts, and high-capacity DIY battery packs.\u003c\/p\u003e","products":[{"product_id":"jkbms-jk-b2a25s-rp-8s-25s-2a-active-balance-smart-bms-rs485-can-lifepo4-li-ion-lto-relay-type","title":"JKBMS JK-B2A25S-RP 8S-25S 2A Active Balance Smart BMS | RS485 \u0026 CAN | LiFePO4 Li-ion LTO | Relay BMS","description":"\u003ch2\u003eJKBMS JK-B2A25S-RP — High-Capacity Active Balance Smart BMS (Relay Type)\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eJKBMS JK-B2A25S-RP\u003c\/strong\u003e is a purpose-built Battery Management System designed for large-capacity series lithium battery packs. Featuring \u003cstrong\u003esupercapacitor-based active energy transfer balancing\u003c\/strong\u003e at up to 2A continuous, built-in Bluetooth, RS485, and CAN interfaces, it delivers comprehensive protection and precision monitoring for demanding ESS and industrial applications.\u003c\/p\u003e\n\u003ch3\u003e🔋 Key Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell Configuration:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eLi-ion (NMC): 8S – 25S\u003c\/li\u003e\n\u003cli\u003eLiFePO4: 8S – 25S\u003c\/li\u003e\n\u003cli\u003eLTO (Lithium Titanate): 12S – 25S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Relay (charge \/ discharge \/ pre-discharge relay control, 12V drive)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Self-powered (battery pack) or external supply, 16V–100V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Balance Current:\u003c\/strong\u003e 2A continuous (supercapacitor-based energy transfer)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost-Balance Cell Voltage Difference:\u003c\/strong\u003e ≤5mV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Cell Voltage Range:\u003c\/strong\u003e 1V – 4.5V | Accuracy ±5mV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Probes:\u003c\/strong\u003e 3× NTC supported\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeating Support:\u003c\/strong\u003e Up to 5A heating current\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoulomb Counter:\u003c\/strong\u003e Supported\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShunt Specification:\u003c\/strong\u003e Configurable via APP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e📡 Communication \u0026amp; Interfaces\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e Built-in — monitor cell voltage, balance status \u0026amp; configure parameters via JKBMS App (Android \u0026amp; iOS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRS485:\u003c\/strong\u003e Standard — 485_A \/ 485_B with GND-TR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCAN Bus:\u003c\/strong\u003e Standard — default CAN_H \/ CAN_L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGPS Interface:\u003c\/strong\u003e Optional port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLCD Display Interface:\u003c\/strong\u003e Optional port (P3)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚡ Power-On Instructions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWith display screen:\u003c\/strong\u003e Press and hold the power button on the display screen for 1 second to power on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWithout display screen:\u003c\/strong\u003e Insert the included activation switch plug into the display interface (P3), then press and hold the activation switch for 1 second to power on.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚙️ Protection Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOvercharge \u0026amp; over-discharge protection (configurable via APP)\u003c\/li\u003e\n\u003cli\u003eOvercurrent protection (configurable via APP)\u003c\/li\u003e\n\u003cli\u003eShort circuit protection\u003c\/li\u003e\n\u003cli\u003eLow voltage shutdown (prevents over-discharge damage)\u003c\/li\u003e\n\u003cli\u003eACC ignition switch support (key-start discharge control)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🌡️ Operating Conditions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -20°C ~ 70°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e 16V – 100V (battery self-powered or external supply)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Power Consumption:\u003c\/strong\u003e 1.5W (BMS board, excluding relay)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandby (Shutdown) Power:\u003c\/strong\u003e 20mW\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Ideal Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSolar energy storage systems (ESS) \u0026amp; base station backup power\u003c\/li\u003e\n\u003cli\u003eElectric sightseeing vehicles, forklifts, shared EVs\u003c\/li\u003e\n\u003cli\u003eHigh-power energy storage \u0026amp; industrial battery packs\u003c\/li\u003e\n\u003cli\u003eBattery balancing, repair \u0026amp; maintenance\u003c\/li\u003e\n\u003cli\u003eDIY large-capacity lithium battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e📦 Package Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× JKBMS JK-B2A25S-RP BMS board\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCables \u0026amp; connectors as specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e⚠️ Note: This is a relay-type BMS. The external relay (12V drive) is \u003cstrong\u003eNOT included\u003c\/strong\u003e and must be sourced separately by the customer.\u003c\/em\u003e\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"Default Title","offer_id":48051419775114,"sku":"JK-B2A25S-RP","price":148.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/JK-B2A25SRP_3af46006-2883-46fd-8b8f-2eea44184d89.jpg?v=1776402012"}],"url":"https:\/\/jkbms-ess.com\/de\/collections\/relay-bms.oembed","provider":"JKBMS-ESS","version":"1.0","type":"link"}