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Functional development –
Vehicle electrics

Functional Concepts
Electrical Design
System Engineering
Circuit Diagrams / Wiring

Functional Concepts
Electrical system architecture including power distribution and fuse concepts
Design of a modular software architecture for controlling and monitoring the various vehicle functions
Planning the bus and network infrastructure (communication and diagnostic systems)
Specification of vehicle functions
Design of redundancy concepts for the electrical system and vehicle control system
Derivation of the requirements for the subsystems
Consideration of functional safety

Electrical Design
Design and dimensioning of energy supply
Design of wiring systems and power electronics (HV, MV)
Provision of required voltage levels (typical DC 24…110 V, 3AC 400 V)
Allocation of the electrical loads to the voltage levels
Creation of an energy record of the vehicle
Optimization of energy consumption (use of storage technologies, recuperation, ...)
Definition of the emergency care concept

System Engineering
Creation of supplier specifications
supplier and product selection
System integration (mechanical, electrical, control engineering)
System development for each individual system (installation space, interfaces, safety considerations)
Systems: drive, brake, door, ETCS, TCMS, HVAC, FIS, lighting, …
Creation of functional schematic diagrams (Visio) for each subsystem
Interface of the circuit diagram and mechanical integration of the electrical components

Circuit Diagrams / Wiring
Selection of suitable components such as switches, relays, fuses, cables and connectors.
Use of schematic diagrams from system engineering for circuit diagram creation
Circuit diagram development for the entire vehicle (e.g. ePLAN, E³, Engineering Base, ...)
Planning the wiring including cable cross-sections and installation routes
Derivation of production documents from circuit diagrams (terminal diagram, cable diagram, connection point tables, parts lists)
Grounding and equipotential bonding, EMC considerations
Switch board planning and design