Environmental Engineering Reference
In-Depth Information
Vehicle
system
controller
(VSC)
42 V loads
Contactor
Current
sensor
Fuse
Battery
physical
mounts
Battery
management
module
(BMM)
Battery
cells
Temperature
sensor
12 V
battery
Voltage
sense
Fans and
manifolds
Air
Battery system
control signal
electrical
physical
Electrical
ground
Environment
Figure 4.47 Battery management supporting systems (Ford Motor Co.)
pushed into the package tray area just behind the rear seat back and beneath the rear
window. Content includes anti-theft, radio head, entertainment amplifiers, multi-
CDROM drives and more. When interior and exterior lighting is included, the load
at the trunk area demands a separate zonal distribution centre.
In hybrid vehicles the same package locations become filled with traction
batteries, or battery climate control hardware in addition to all the pre-existing
electronic content. Power distribution centres today are still relay boxes having bus
bar interconnects and some introduction of smart power semiconductors. The
semiconductor content is expected to increase significantly with hybrid vehicles
and as more powerful controller area networks (CANs) are incorporated such as
FlexRay.
4.6 Communications
In vehicle and outside of the vehicle communications are fast growing technology
areas in automotive applications. Automotive communications networks have
typically used LANs (local area networks) of the CAN variety. The GM Hywire
concept vehicle, for example, is advertised as a completely x-by-wire architecture,
but CAN networks are converting over to protocols that are more fault tolerant and
have guaranteed communications times and no issues with message latency as has
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