Battery Management System
High-reliability 16S battery management system dossier verifying cell balancing circuits, isolation voltage barriers, and active charge/discharge protections.
01 / Case Study: Hardware Context
This Battery Management System (BMS) controls a 16-series cell lithium-ion battery pack. It runs cell voltage acquisition, temperature tracking, passive cell balancing, and emergency over-current safety cutoff protection.
Platform Architecture & Overview
The PRJ-BMS-16S project manages cell-voltage balancing and battery health monitoring for a 16-cell series lithium-ion energy pack. The system separates high-voltage battery arrays from low-voltage microcontrollers through galvanically isolated SPI boundaries.
Requirements Outlines
- REQ-BMS-001 (Cell Monitoring): System must resolve individual cell voltages (up to 16 series cells) with an accuracy of $\pm$5mV across temperature extremes.
- REQ-BMS-002 (Isolation Barrier): Low-voltage digital control logic must be isolated from the battery pack voltages with a minimum dielectric breakdown limit of 2.5kV RMS.
02 / Case Study: Design Bottleneck
Precision voltage measurement resolution (+/-5mV accuracy) under high-voltage battery offsets. High voltage dielectric isolation of 2.5kV RMS breakdown protection for low-voltage digital interface logic.
03 / Case Study: OmeraCode Resolution
The Electrical Design Solvers calculated balancing resistor power margins and dissipation limits. The FootprintSanityGate locked clearance rules, while OmeraCode trace solvers optimized signal loops to prevent transient switching noise from balancing lines.
04 / Case Study: Evidence & Artifact Metrics
VERIFIED PHYSICAL PARAMETERS MANIFEST
- Dielectric Isolation Boundary Check
Verified 2.5kV RMS galvanic isolation lines.
- Cell balancing trace current capacity
Calculated trace temp rise on balancing routes.
- ADC Voltage Sensing Precision
Ensured high trace impedance symmetry to optimize sensing matching.