NTBatteryManagementSystem: Safety Reference Design In .
D ataSheetNTBatteryManagementSystem: Safety reference designin compliance to ISO 26262 ASIL CDescriptionTypical ApplicationsNTBMS is a Battery Management System for manufacturer ofautomotive Battery Systems, used as Starter Battery or AuxiliaryBattery with Li-Ion cells.Automotive BMS for Starter Battery with Li-Ion batteryAutomotive BMS for Auxiliary BatterySmart GridsOther Battery Management opportunities (medical, e-Bike,light transportation, industrial)The NTBMS platform is designed for systems with high demandon reliability and safety in compliance with ISO 26262 ASIL C.NTBMS is a generic safety reference design for BMS developedin cooperation with NXP. The Battery Management System of LiIon battery includes cell monitoring, current sensing, passive cellbalancing, battery breaker control, computation unit for Batteryparameter extraction (such as State of Charge, State of Health)and communication to other ECU through CAN.Battery management systems (BMS) are responsible to steerand control high-voltage batteries of Electric and Hybrid ElectricVehicles. This control unit is essential since several battery cellsare unified to a cluster to enhance battery capacity. It is a chargeregulator which should guarantee a stringent power supply ofthe engine.BMS are essential to monitor state of charge, load distribution,temperature of each battery cell as well as of the whole batterypackage and development of the charging capacity.Customer BenenfitsAccelerate time to marketReduction in costs for development and certificationSafety Development Platform for BMSReference Design in compliance to ISO 26262 ASIL CKey FeaturesIntegrated system diagnostic functions up to ASIL COvercurrent protectionOvercharge protectionOver-temperature protectionOver-voltage protectionUnder-voltage protection (short circuit)Protection against unintended relay closeProtection against unintended relay openCrash detection inputFigure 1: NTBMS Baseboard & NT SafeSOMmicroNewTec GmbHBuchenweg 3 89284 Pfaffenhofen a.d. Roth Tel.: 49 7302 9611-0 info@newtec.de www.newtec.de1
D ataSheetTechnical DataPower SupplyThe device is designed for operation with 12V to 18V DC powerSupply. Operation with other supply voltages is not permitted.The supply voltage is connected via the connection cable provided for this purpose.Battery CharacteristicsElectrical current carrying capability for shunt resistor250 A permanent;600 A for 40 s;1400 A for 1 sEnvironmental ConditionsTemperatureThe device is designed for storage and operations at the following temperature ranges:Storage temperature: -15 C to 70 COperating temperature: 0 C to 40 CBattery Management System currentoperating current 25 mA@RTOther CharacteristicsIntrusive diagnostics (performed by MCU)Memory storage (RAM & flash)Power management (low power and normal mode)LIN for starter batteriesCAN for the auxiliary batteries.System OverviewFigure 2: Block Diagram NTBatteryManagementSystemNewTec GmbHBuchenweg 3 89284 Pfaffenhofen a.d. Roth Tel.: 49 7302 9611-0 info@newtec.de www.newtec.de2
D ataSheetOperationsAccess to the DeviceDuring operations, the user must prevent access to or contact with the device for children, pets, plants, and insects.Controls and Display Elements SafeSOMmicroS1: Reset ButtonH1: Diagnostic MCU, User defined LEDH2: Diagnostic MCU, User defined LEDH3: Safety MCU Status LED: LED on Initialization successfulH4: Safety MCU Status LED: LED Blinking MCU communication OK; LED ON ErrorH5: VDD presentControls and Display Elements BMS BaseboardsH1: BCC Fault output LEDJumper Settings BMS Base Board:P3: Soldering Jumper for Breaker sense control selection:Short Pin 1 2: BCC (default), Short Pin 2 3: MCU1P4: Close Jumper to enable CAN TerminationP7: Close Jumper to supply VBAT AUX from CL30Connector Description SafeSOMmicroP1: JTAG Interface Diagnostic MCU2x5 Pin Header RM 1,27mmPin NumberDescriptionPin NC10/MCU ResetDescriptionPin NumberDescriptionP2: JTAG Interface Safety MCU2x5 Pin Header RM 1,27mmPin NumberNewTec GmbH15V2TMS3GND4TCLK5GND6TDO7NC8TDI9NC10/MCU ResetBuchenweg 3 89284 Pfaffenhofen a.d. Roth Tel.: 49 7302 9611-0 info@newtec.de www.newtec.de3
D ataSheetP3: TTL UART Connector, 5V3 Pin Header RM2,54mmPin NumberDescription1GND2MCU TX3MCU RXP4: GNDSingle PinX1: Baseboard Connector 1Pin NumberDescriptionPin NumberDescription1MCU2 PTA611SBC FS1B2MCU2 PTA712SBC IO03SPI CLK13SBC IO54SPI MISO14SBC IO45MCU2 PTC215CAN Low6MCU2 PTC316CAN High7SPI CS17VSUP3: Filtered VBAT output8MCU2 PTA018VBAT: 12V Power supply input9MCU1 PTD019GND10MCU1 /RST20GNDDescriptionPin NumberDescription111MCU1 PTA13212MCU1 PTA12313MCU1 PTA11414VDD: 5V515SBC PTE0616SBC FS0B717VAUX: 5V818GND919GND1020VDDA: 5VX2 Baseboard Connector 2Pin NumberNewTec GmbHBuchenweg 3 89284 Pfaffenhofen a.d. Roth Tel.: 49 7302 9611-0 info@newtec.de www.newtec.de4
D ataSheetConnector Description BMS BaseBoardP1: VBat Measurement Connector4mm Banana Jack, not fitted by default, Part No: Hirschmann 973 582-101P2: VBat- Measurement Connector4mm Banana Jack, not fitted by default, Part No: Hirschmann 973 582-100P5: GNDP6: Breaker ConnectorMolex 34793-0080Pin NumberDescriptionPin NumberDescription112V5NC2Breaker Close6NC312V7Fuse Sense Input (optional)4Breaker Open8Breaker Sense InputPin NumberDescriptionPin NumberDescription1CL30 Input5Feature ConnectorP8: Vehicle ConnectorMolex 34793-00822CAN High6Feature Connector3CAN Low7Feature Connector4Crach detection input8GNDP9: Feature Connector3 Pin Header RM2,54mm, reserved for future use.P10: Battery Cell ConnectorMolex 501876-1640Pin NumberDescriptionPin NumberDescription1GND9Cell 12Temp Sensor 110CTRef3GND11Cell 34Temp Sensor 212Cell 25GND13Cell 56Temp Sensor 314Cell 47GND15VBAT AUX8GND16Cell 6P11: Aux Connector (Semiconductor Relais)Molex 34793-0081NewTec GmbHBuchenweg 3 89284 Pfaffenhofen a.d. Roth Tel.: 49 7302 9611-0 info@newtec.de www.newtec.de4
D ataSheetTemplates and FMEDA ResultsEvaluation BoardHowTo Guide for ASIL CSafety Software for BMS(Object Code)Safety Software License for BMS(Source Code)CertificationPackageIntroduction Guide for ASIL CSafetyPackageApplication Software withDriver (Non Safe) Layout w/Gerber FilesSoftwarePackageLayout w/ Gerber FilesBoardPackageSchematicReferencedesignPackages & Services Complete Safety Documentationfor certification Certification F882 0918SupportFigure 3:Available Solution Option forNTBatteryManagementSystemNewTec GmbHBuchenweg 3 89284 Pfaffenhofen a.d. Roth Tel.: 49 7302 9611-0 info@newtec.de www.newtec.de5
Battery with Li-Ion cells. The NTBMS platform is designed for systems with high demand on reliability and safety in compliance with ISO 26262 ASIL C. NTBMS is a generic safety reference design for BMS developed in cooperation with NXP. The Battery Management System of Li-Ion battery includes cell monitoring, current sensing, passive cell
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