CELL MONITORING BOARDS
Modular cell monitoring platform with ASIL D safety, 15+ variants from 6 to 108 cells, and optional EIS, active balancing, and wireless communication.
BATTERY MANAGMENT SYSTEMS
DESIGN PHILOSOPHY
PRECISION WITHOUT COMPLEXITY
The CMB is a streamlined hardware component with no embedded software. It measures cell voltages and temperatures with high accuracy, performs balancing, and communicates via isolated daisy-chain: all with minimal complexity and zero cybersecurity exposure on the board itself.
The daisy-chain architecture is a key design advantage. An efficient driver implementation supports over 500 cells plus additional analog front-ends, such as current measurement, on a single chain. This eliminates separate communication buses and keeps wiring simple even in the largest systems.
All intelligence lives in the BMS controller. The CMB does one thing well: precise, reliable, safety-rated cell monitoring at the module level.
CMB SIGNAL FLOW
CELL INTERFACE
6–108 cell voltage inputs per board
VOLTAGE SENSING
±2.1 mV accuracy, ASIL D rated
TEMPERATURE SENSING
Multiple external NTCs per board
BALANCING
125–200+ mA passive (standard)
ISOLATED COMMUNICATION
isoSPI / isoUART daisy-chain, 2 Mbps, 500+ cells per chain
BMS CONTROLLER
All intelligence in the controller, not on the CMB
KEY FEATURES
BUILT FOR EVERY PACK
High-accuracy cell monitoring with the flexibility to match any module design, any chemistry, and any safety requirement.
ASIL D SAFETY MONITORING
Individual cell voltage (±2.1 mV) and temperature monitoring at the highest automotive safety integrity level. Fault tolerance time interval below 120 ms, the system detects and responds to safety-critical conditions within this window.
ANY CHEMISTRY, ANY SIZE
15+ variants from 6 to 108 cells. NMC, LFP, NCA, LMFP, solid-state, software-configurable. No hardware change needed for a chemistry switch.
PASSIVE BALANCING STANDARD
125–200+ mA balancing current on every CMB variant. Multiple NTC temperature sensors per board for comprehensive thermal monitoring across the entire module.
OPTIONAL ADVANCED FEATURES
EXTEND THE PLATFORM
Three optional capabilities that turn the CMB from a monitoring board into a full cell-level intelligence platform.
EIS: CELL-LEVEL DIAGNOSTICS
On-board electrochemical impedance spectroscopy measures cell impedance across frequencies (0.1 Hz – 5 kHz). Enables SoH estimation, lithium plating detection, internal short circuit early warning, and degradation attribution. Supports EU Digital Battery Passport compliance.
ACTIVE BALANCING
Module-to-module energy transfer at 2–3 A — 10 to 20 times faster than passive balancing. ~95% efficiency means energy is transferred, not wasted. Increases usable pack capacity by 2–4% and accelerates commissioning of large systems.
Up to 3 A Transfer
WIRELESS COMMUNICATION
Eliminates all communication harnesses within the battery pack. Radio-based data link to wireless gateway with patented low-power wakeup. Major simplification for stationary and modular deployments — reduces assembly time and potential failure points.
Zero Harness
PLATFORM COMPATIBILITY
ONE PLATFORM, EVERY VARIANT
The SBS Core is part of Munich Electrification's 3rd-generation Barcelona BMS platform, sharing a common hardware architecture and software stack with SBS High, SBS Multistring, and SBS Stationary.
All four Barcelona variants run the identical SBS Software Platform. One software image supports every variant, switchable at runtime via the Configuration Framework. This means SBS Core benefits from the same validated, ASIL D ready codebase with 14-day release cadence.
The platform is compatible with ME's CMBXX cell monitoring board family, supporting 6 to 64+ cells per board. SBS Core offers 1–2 isoSPI channels in bus or ring topology, enabling diverse cell monitoring architectures.
COMPATIBLE CONTROLLERS
CMB XX: 15+ VARIANTS
SBS CORE
Cost-optimized BMS controller
SBS HIGH
High-performance BMS controller
SBS MULTISTRING
Multi-string BMS controller
SBS STATIONARY
Stationary storage BMS controller
VIENNA
Software suite for alternative MCU platforms
HARDWARE ABSTRACTION LAYER: Single software binary for all CMB variants. Variant-specific parameters are handled at runtime.
| Parameter | Value |
|---|---|
| Cell Channels | 6–108 per CMB |
| Variants | 15+ |
| Cell Voltage Accuracy | ±2.1 mV |
| Temperature Sensors | Multiple external NTCs (100 kOhm) |
| Temperature Accuracy | Up to 0.1% (NTC dependent) |
| Passive Balancing | 125–200+ mA (standard) |
| Active Balancing | Up to 3 A (optional, ~95% efficiency) |
| Communication | isoSPI / isoUART, daisy-chain, 2 Mbps, 500+ cells per chain |
| Isolation | Up to 1500 V |
| Chemistry Support | NMC, LFP, NCA, LMFP, solid-state |
| EIS | Optional on-board (0.1 Hz – 5 kHz) |
| Wireless | Optional radio-based communication |
| Connectors | Automotive-grade, gold contacts, stackable |
- No embedded software
- Zero on-board attack surface
- Pure hardware design
- Isolated communication
TECHNICAL SPECIFICATIONS
FULL SPEC SHEET
READY TO SCALE YOUR CELL MONITORING?
Get in touch with our team to find the right CMB variant for your application.