{"product_id":"akkuschutzmodul-bms-li-ion-1s-mit-temperatursensor","title":"Battery Protection Module (BMS) Li-Ion 1S with Temperature Sensor for MR2","description":"\u003cul\u003e\n\u003cli\u003eProtects 1S Li-ion and LiPo cells: overcharge protection at 4.275 V, over-discharge protection at 2.8 V, short-circuit protection\u003c\/li\u003e\n\u003cli\u003eUsually just called a \u003cstrong\u003eBMS\u003c\/strong\u003e in the mesh community – technically a 1S protection circuit (PCM)\u003c\/li\u003e\n\u003cli\u003eIntegrated temperature sensor – supplies the MR2 with the cell temperature for temperature-controlled charging\u003c\/li\u003e\n\u003cli\u003eBQ29700 protection IC from Texas Instruments instead of the usual DW01A\u003c\/li\u003e\n\u003cli\u003eAny cell format: 18650, 21700, 26650, pouch\/LiPo – the module is soldered directly to the cell\u003c\/li\u003e\n\u003cli\u003eCompact: 22 × 6.2 × 2.8 mm, 1 A continuous current\u003c\/li\u003e\n\u003cli\u003eAlso available pre-assembled – in the battery cable for the MR2 with protection module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBattery protection module for single-cell Li-ion batteries (1S) with an integrated temperature sensor\u003c\/strong\u003e – protects the cell against overcharge, over-discharge and short circuit while supplying the Inhero MR2 with the cell temperature for charge control.\u003c\/p\u003e\n\u003cp\u003eThe module is based on the \u003cstrong\u003eBQ29700\u003c\/strong\u003e from Texas Instruments. Off-the-shelf 1S protection modules mostly use the simpler DW01A and do not include a temperature sensor matched to the MR2.\u003c\/p\u003e\n\u003ch3\u003eOn the name: BMS or protection module?\u003c\/h3\u003e\n\u003cp\u003eIn the MeshCore and Meshtastic communities a module like this is almost always called a \u003cstrong\u003eBMS\u003c\/strong\u003e – if you are searching for a “1S Li-ion BMS”, this is the part you mean. Strictly speaking a Battery Management System does more than this: cell balancing, charge control, thermal management, communication. This module is a pure \u003cstrong\u003eprotection circuit (PCM)\u003c\/strong\u003e for a single cell. Balancing is irrelevant at 1S anyway, and on the MR2 charge control is handled by the onboard BQ25798. Functionally it does exactly the job the community means when it says BMS.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection IC:\u003c\/strong\u003e BQ29700 (Texas Instruments)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvercharge protection:\u003c\/strong\u003e 4.275 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-discharge protection:\u003c\/strong\u003e 2.8 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort-circuit protection:\u003c\/strong\u003e yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current:\u003c\/strong\u003e 1 A max. (charge and discharge)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell balancing:\u003c\/strong\u003e no (not required at 1S)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature sensor:\u003c\/strong\u003e integrated, matched to the Inhero MR2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell chemistry:\u003c\/strong\u003e Li-ion \/ LiPo, single cell (1S)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell format:\u003c\/strong\u003e any – 18650, 21700, 26650, pouch (soldered directly)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 22 × 6.2 × 2.8 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× battery protection module Li-ion 1S with temperature sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e⚠ Important notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Li-ion \/ LiPo cells only.\u003c\/strong\u003e For LiFePO₄, please use the corresponding LiFePO₄ version – the cutoff thresholds are not compatible and mixing them up will damage the cell.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimit the charge current:\u003c\/strong\u003e the MR2 charge current is adjustable up to 1500 mA via the CLI. When using this module, cap it at 1000 mA (\u003ccode\u003eset board.imax 1000\u003c\/code\u003e).\u003c\/li\u003e\n\u003cli\u003eThe module is soldered to the cell. If you would rather avoid soldering at the cell, it is available pre-assembled in the battery cable for the MR2 with protection module.\u003c\/li\u003e\n\u003cli\u003eESD-sensitive assembly – handle only with appropriate ESD protection.\u003c\/li\u003e\n\u003cli\u003eBattery not included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManufacturer Information (GPSR)\u003c\/h3\u003e\n\u003cp\u003eInhero GmbH, Gewerbestraße 19, 08115 Lichtentanne, Germany · info@inhero.de\u003c\/p\u003e","brand":"Inhero GmbH","offers":[{"title":"Default Title","offer_id":57310905926007,"sku":"#BPLI1","price":2.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/2230\/5911\/files\/DSC1905.jpg?v=1784368312","url":"https:\/\/shop.inhero.de\/en\/products\/li-ion-1s-battery-protection-module-bms","provider":"Inhero","version":"1.0","type":"link"}