General Description
Danger: Service and repair of an electric vehicle should only be performed by technicians that have completed HV3 Daimler Safety Training. To prevent personal injury or death, or damage to the electric system, do not attempt repairs yourself.
Warning: The strong electromagnetic field generated by the inverter can cause severe personal injury or death to people with active implanted cardiac devices. Individuals with an active implanted cardiac device must stay away from the vicinity of the active equipment.
For an overview of the eCascadia electric vehicle components, see Fig. .
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Front-Box Area
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Mid-Frame Area
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Rear Area
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Inverters
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Charge Fuse
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Direct Current (DC) Boxes
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High-Voltage Batteries
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Charge Port(s)
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eCarriers
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eAxles
Fig. 1, eCascadia Electric Vehicle Components Overview
For a diagram of a high-voltage battery, see Fig. .
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Housing
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EE Box
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Outlet Manifold
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Inlet Manifold
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Gasket
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Coolant Line
Fig. 2, High-Voltage Battery
For the components of a high-voltage cable, see Fig. .
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Cable
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Cable Gland Retaining Ring
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Sealing Rubber
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Shield Clip
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Cable Gland Connector Ring
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Adapter Plate
Fig. 3, High-Voltage Cable
For the connections between high-voltage batteries, see Fig. .
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High-Voltage Cable
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Plug
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Tie Straps
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Clamps
Fig. 4, High-Voltage Cables Connecting the Batteries
Inverter: An inverter converts power from a direct current (DC) power source (the high-voltage batteries) to the three phase alternating current power needed to drive the motor.
Charge Port(s): A vehicle may be outfitted with one or two charging ports. A single coupler in either inlet may be used to charge a vehicle with dual ports. When both inlets are used, inlet one charges battery one and two and inlet two charges battery three and the power supplied to inlet one is double the power supplied to inlet two.
Charging: The high-voltage batteries can only be charged at DC charging stations meeting the J1772 standards.
Charging Time: When charging with a direct current, the charging time will vary based on the size of the charger and the vehicle limitations. In general, charging a factory-fitted high-voltage battery to 95% of the charge level with a direct current and a charging power of 180kW will take 2-3 hours, depending on battery size.
Electric Vehicle Distribution Module (EVDM): An electrical system on a commercial vehicle usually consists of 12V and/or 24V loads/components that are connected to power distribution modules to get energized and be functional. In these systems, it is desirable to protect 12V and 24V components, outputs/inputs, wires and cables from possible over-current events. The electric vehicle power distribution module (EVDM) is the main component implementing this functionality on an electric vehicle.
The eCascadia has a multiplex electrical system. By transmitting multiple electronic messages through the same wire, a multiplex system reduces the number of interconnected wires, allows for more precise control of the electrical system, and makes it easer and quicker to diagnose electrical faults and add optional equipment.
In addition, the wiring harnesses are developed for the maximum number of options, meaning that space for additional wires is available within the wiring harness regardless of the number of optional features on the vehicle. This design provides a cleaner main harness and is meant to eliminate the need for wiring overlays
Electronic control modules (ECUs) coordinate power to outputs such as lighting, displays, gauges, and indicators and control power distribution by monitoring inputs such as sensors and switches.
The ECUs also continuously monitor the status of all input devices and transmit messages over multiple control area networks (CANs), reducing the number of sensors required for operation.