THE FIRST CLASS UPDATE FOR BMS SYSTEMS
Munich Electrifications Battery Management Disconnect Unit (BMDU) is a highly integrated, plug-and-play solution designed specifically for the heavy-duty electric vehicle market. We’ve combined BMS, contactors, fuses, pre-charge and current sensing into a single module. One supplier, one qualification, one unit: we streamline assembly and enhance reliability for megawatt charging applications. Optimize your performance with one qualified solution built for the future of commercial transport.
BATTERY MANAGEMENT DISCONNECT UNIT
THE INTEGRATION ADVANTAGE
ONE UNIT. ONE SUPPLIER. ONE QUALIFICATION.
The BMDU replaces the BMS ECU, contactors, fuse, pre-charge, current sensor, and power distribution with a single plug-and-play module — cutting integration effort, cost, and time to production.
MEGAWATT CHARGING
BUILT FOR MEGAWATT CHARGING SYSTEMS
Heavy-duty trucks need megawatt charging for viable depot turnaround times. The BMDU is designed and thermally validated to handle the full MCS charge profile — high sustained currents followed by controlled taper — over the entire product lifetime without degradation.
In multistring configurations, the combined system current scales linearly with the number of parallel strings. With up to 16 BMDUs in parallel, the system comfortably supports megawatt-class charging infrastructure.
> 600 A
Peak current per string, sustained over the full MCS charge cycle. Thermally validated for the complete product lifetime.
> 10 kA
Combined system current with 16 parallel strings. True megawatt-class charging infrastructure compatibility at scale.
> 30 min
Full MCS charge profile duration. Peak current sustained, then controlled taper — designed to repeat over the entire vehicle lifetime.
Core Technology
THE BREAKTOR
CHANGES EVERYTHING
The Breaktor replaces both contactors and the HV fuse with a single device. It trips under short-circuit conditions and resets automatically. No service intervention. No replacement parts. No downtime.
Zero Fuse Replacement
Traditional fuses blow once, taking the vehicle out of service. The Breaktor resets automatically after fault clearance. No parts, no technician, no downtime.
Dual-Pole Disconnection
Both positive and negative poles disconnect simultaneously, providing complete galvanic isolation. One device instead of two separate contactors.
Intelligent Dual-Pole Pre-charge*
Custom pre-charge charges both poles simultaneously in under 500 ms. In multistring configs, the master BMS selects which string's pre-charge to use, distributing wear evenly. Automatic failover after 10 attempts.
*optional
Patented Integration
The BMDU integration concept — combining BMS ECU, contactor, busbar, current measurement, and isolation monitoring in a single unit — is protected by Munich Electrification patents.
BREAKTOR
Replaces contactors + fuse in a single device
BARCELONA SBS ECU
AUTOSAR ICC 3, ISO 26262, full BMS intelligence
DUAL SHUNT
High-precision current measurement, integrated
PRE-CHARGE BACKPACK
Dual-pole simultaneous pre-charge in < 500 ms
EE-CARRIER + BUSBARS
Mechanical integration, HV routing, isolation, cooling interface
HEAD-TO-HEAD
BMDU VS. TRADITIONAL ARCHITECTURE
Side-by-side comparison of the integrated BMDU approach versus the conventional multi-component battery management architecture.
Traditional (BMS + PDU + Fuse)
Components to integrate
Suppliers to manage
6 - 8 separate units
3 - 5 suppliers
Multiple, per component
Qualification cycles
Replace fuse, vehicle out of service
After short-circuit event
Dedicated gateway ECU required
Multistring gateway
Depends on contactor + fuse ratings
MCS charging
Separate circuit, single-pole
Pre-charge
Extensive inter-component wiring
Harness complexity
Multiple housings, connectors, mounting hardware
Pack space & weight
Pack integrator manages all interfaces
Point of responsibility
BMDU
1 unit
1 supplier
1 cycle, complete subsystem
Breaktor resets automatically
Integrated dynamic multistring gateway, no extra HW needed
Validated for >600 A sustained
Integrated, dual-pole, auto-failover
Minimal, internal routing
Single compact unit, significant volume savings
One-Stop-Shop: Munich Electrification
System Architecture
NO GATEWAY REQUIRED
Up to 16 parallel strings managed by dynamic master election. Each BMDU can act as master. If the master fails, another takes over automatically. The connection strategy maximizes available energy even when individual strings are degraded.
CMBXX DAISY CHAIN
High cell count per CMB. Stackable housing.
Onboard cell balancing.
CMBXX DAISY CHAIN
Gold-contact connectors. isoSPI communication.
Cell-to-pack architecture support.
CMBXX DAISY CHAIN
Supports LMFP, NMC, LFP cell chemistries.
ISOSPI
BMDU
BATTERY MANAGEMENT & DISTRIBUTION UNIT
BREAKTOR
SBSM ECU
DUAL SHUNT
PRE-CHARGE
BUSBARS
ISOLATION
PTCAN
VEHICLE / VCU
CAN bus interface. Charge/discharge requests from VCU.
No additional gateway or concentrator required.
PARALLEL STRINGS (UP TO 16)
Dynamic master election. Automatic failover.
Energy-maximizing connection strategy across all available strings.
TECHNICAL SPECIFICATIONS
BUILT FOR EXTREMES
ELECTRICAL
Operating Voltage
Up to 1000 V
Supply Voltage
12 V - 16 V
MCS Peak Current
> 600 A per string
Max Strings
16
Environmental & Lifetime
Operating Temperature
-40 to +85 °C
Design Lifetime
> 15 years
Operating Hours
> 70,000 h
Lifetime Distance
> 1,900,000 km
SW Architecture
AUTOSAR ICC 3
Insulation
Reinforced, 1000 V
GET IN TOUCH
If you would like to know more about these product, feel free to contact us.