Lesson 1How components interact durin normal drivin an chargin: a concise end-to-end sequence from pack energization to in-use monitorin an chargin negotiationDis section walk yuh through how BMS components interact from pack wake-up an precharge through normal drivin an chargin, includin monitorin, protection actions, an coordination wid charger an vehicle control units, easy fi understand.
Pack wake-up, checks, an precharge sequenceContactor closure an HV bus validationReal-time monitorin durin propulsionFault detection an protective responsesChargin session negotiation an controlShutdown, sleep, an post-drive behaviorLesson 2CAN an other communication layers: message types (cell voltages, temps, currents, fault codes), diagnostics, toolin access (OBD/CAN adapters)Dis section introduce CAN an related communication layers use by di BMS, coverin message types fi voltages, temperatures, currents, an faults, diagnostics, an how tools access data via OBD or dedicated CAN adapters, straight up.
BMS CAN bus topology an bit rate choicesPeriodic telemetry an status message setsFault codes, DTCs, an diagnostic sessionsFirmware updates an bootloader over CANOBD-II access an external scan toolsData loggin wid CAN adapters an scriptsLesson 3Current sensin methods: shunt vs Hall-effect, placement, accuracy, drift an calibrationDis section compare shunt an Hall-effect current sensin, discussin placement in di pack, accuracy an bandwidth trade-offs, thermal drift, calibration procedures, an how current data feed protection an energy estimation, clear as day.
Shunt resistor selection an power dissipationHall-effect sensors an magnetic layoutHigh-side vs low-side sensor placementAccuracy, bandwidth, an noise trade-offsOffset, gain drift, an temperature effectsCalibration routines an in-field verificationLesson 4Main controller functions: voltage aggregation, SOC/SOH computation, balancin control, fault managementDis section cover main controller responsibilities, includin aggregatin cell voltages, computin SOC an SOH, managin balancin, an coordinatin fault detection, loggin, an protective actions across di entire battery pack, fi real.
Voltage aggregation an pack state estimationSOC estimation models an filterinSOH trackin an degradation indicatorsBalancin strategy an control algorithmsFault detection logic an fault handlinData loggin, events, an freeze framesLesson 5Temperature sensin: types (NTC, PTC, thermistors, RTDs), placement strategy (cell groups, coolant, ambient), impact on limitsDis section examine temperature sensin fi cells an pack, comparin NTCs, PTCs, thermistors, an RTDs, placement strategies fi cells, coolant, an ambient, an how temperature data shape charge, discharge, an safety limits, no joke.
NTC, PTC, an RTD characteristics overviewSensor attachment to cells an busbarsCoolant loop an ambient temperature sensinRedundancy an plausibility checks fi sensorsTemperature-based charge an discharge limitsOvertemperature fault handlin an deratinLesson 6Contactor an precharge circuits: purpose, driver logic, fail-safe behavior, interlock an safety scenariosDis section explain di role of contactors an precharge circuits, how driver logic sequence dem, an how fail-safe design, interlocks, an safety scenarios prevent hazardous pack energization an fault propagation, serious ting.
High-voltage contactor construction an ratingsPrecharge resistor sizin an timin profilesContactor driver logic an coil suppressionInterlock loops an safety chain designFail-safe states an loss-of-power behaviorFault detection an contactor weld diagnosisLesson 7Cell monitorin units (CMUs): functions, measurement accuracy, isolation, samplin ratesDis section detail cell monitorin unit roles, includin cell voltage an temperature measurement, isolation methods, samplin rates, accuracy considerations, an communication wid di main controller in modular pack architectures, step by step.
CMU hardware architecture an channel countVoltage measurement circuits an filterinIntegrated temperature sensin interfacesIsolation techniques an safety standardsSamplin rates, latency, an synchronizationCMU self-test an diagnostic coverageLesson 8Overview of a 96s NMC lithium-ion pack electrical topology an voltage ranges (nominal, charge, discharge)Dis section describe a 96s NMC pack topology, includin series an parallel arrangements, busbar layout, voltage ranges fi nominal, charge, an discharge, an implications fi insulation, creepage, an system design margins, good fi know.
Series an parallel string configuration optionsBusbar layout, fusin, an harness routinNominal, max charge, an min discharge voltagesImpact of voltage on insulation an clearancesPack segmentation an service disconnects
