Ford Ranger EV. Electric Manual - part 3

LESSON 1: VEHICLE OVERVIEW

1-9

Traction Battery Heating System (Optional)

Optional Traction Battery Heating System

•

To maintain proper temperature during charging in cold climates,

an optional traction battery-heating system is available.

•

The lower level of battery modules is heated using a blanket

heater (B) to heat the entire lower level.

– The lower level blanket heater is located underneath the battery

modules.

•

The upper level uses individual heating elements (A) wired in series.

– The upper level heating elements are mounted directly to the

side of each battery module.

•

The battery heating function is controlled by the battery control

module.

– The module will activate the battery heating system if the

traction battery temperature falls below 15°C (59°F) while

connected to an activated charge station.

– Heating function is deactivated when the traction battery

temperature rises above 25°C (77°F). The upper and lower

heating elements may function independently based on input

from temperature sensors.

LESSON 1: VEHICLE OVERVIEW

1-10

Traction Battery Wiring and Circuit Protection

Traction Battery Circuit Protection

•

The traction battery uses low and high voltage wiring.

•

The high voltage circuit is protected by a 400-volt 250 amp fuse

installed between batteries 20 and 21.

•

If the fuse opens or is removed, the high voltage circuit is

interrupted.

•

Two high voltage connectors connect the traction battery to the

vehicle systems.

•

The primary power (2-pin) connector is located at the rear of the

battery tray and transfers power to the motor/transaxle.

•

The auxiliary power (4-pin) connector is located near the front of

the battery tray on the passenger side. It transfers high voltage

power to the vehicle’s auxiliary high voltage circuits.

•

Both high voltage circuits are part of the vehicle high voltage

interlock circuit (covered later in this lesson).

•

The low voltage connector is located near the front of the battery

tray on the driver side and transfers low voltage to the vehicle’s

low voltage circuits.

– The low voltage connector is a 76-pin connector.

LESSON 1: VEHICLE OVERVIEW

1-11

Contactor Box Assembly (CBA)

Contactor Box

•

The contactor box assembly (CBA) (arrow) is located in the rear of

the traction battery at the upper left side.

•

The contactor box serves as the on/off switches for the traction

battery.

•

Relays are used to interrupt the flow of high voltage when the

driver’s key is turned to the OFF position, the inertia shutoff switch

is activated or the system is in shutdown mode actuated by an

electronic control module.

•

The contactor box supports these additional functions:

– high voltage circuit precharging – the high voltage circuits

require precharging. Otherwise, the large voltage differential

might weld contactors as circuits are switched on. Precharging is

accomplished through two relays and two 20-ohm resistors

located in the contactor box.

– traction battery current sensing – the contactor box contains two

Hall effect sensors that monitor the current from the traction

battery. One sensor monitors the current flow into the traction

inverter module (TIM) (power for the motor/transaxle),

and the other monitors current flow into the high voltage

auxiliary circuits.

– high voltage circuit protection – the charging, battery heater and

high voltage auxiliary circuits are protected by three fuses in the

contactor box.

LESSON 1: VEHICLE OVERVIEW

1-12

12-Volt Battery

12-Volt Battery Location

•

The 12-volt battery is located in the left front corner of the

underhood compartment.

•

The 12-volt battery is used for lighting and other low-voltage

circuits and systems.

•

The DC/DC converter acts as an alternator to charge the

12-volt battery.

•

The 12-volt battery in the Electric Ranger is different than that used

in the gasoline-powered Ranger.

– The Electric Ranger does not require large 12-volt battery

capacity due to the absence of a high current starter circuit.

– The Electric Ranger battery is a 31 amp-hour deep cycle battery.

NOTE: Never attempt to jump-start the 12-volt battery.