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Chevrolet BOLT EV Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12163003) - 2019 - crc - 5/18/18
Vehicle Care 261
1. Windshield Washer Fluid
Reservoir. See Washer Fluid
0 262.
2. Cabin Heating Coolant
Reservoir. See Cooling System
0 261.
3. High Voltage Battery Coolant
Reservoir. See Cooling System
0 261.
4. HPDM (High Power Distribution
Module).
5. APM (Accessory Power
Module), OBCM (On-Board
Charging Module).
6. Brake Fluid Reservoir. See
Brake Fluid 0 264.
7. SPIM, APM, and Charger
Module Coolant Reservoir. See
Cooling System 0 261.
8. Battery. See Battery - North
America 0 265.
9. Underhood Compartment Fuse
Block. Underhood
Compartment Fuse Block
0 273.
Cooling System
It is not necessary to regularly
check coolant unless a leak is
suspected or an unusual noise is
heard. A coolant loss could indicate
a problem. Have it inspected and
repaired by your dealer.
The following explains the cooling
systems and how to check coolant
levels.
.
High Voltage Battery
.
Single Power Inverter Module
(SPIM), Accessory Power
Module (APM), and Charger
Module
.
Cabin Heating
High Voltage Battery
During vehicle operation and also
during charging, the high voltage
battery cells in the vehicle are kept
within a normal operating
temperature range. If the
temperature rises above this
temperature, the battery cooling
system turns on the air conditioning
compressor and cools the coolant
until the correct temperature is
reached. If the temperature falls
below this temperature, a high
voltage heater, located outside the
battery on a cradle, heats the
coolant until the correct temperature
is reached.
Single Power Inverter Module
(SPIM), Accessory Power
Module (APM), and Charger
Module
The SPIM, APM, and charger
module are cooled using a separate
coolant loop. These modules are
kept below a maximum temperature.
If the temperature rises above this
temperature, the electric cooling fan
will turn on to cool the coolant.
Cabin Heating
Cabin heating is maintained by
coolant heated by the Coolant
Heater Control Module (CHCM),
separate from the power electronics
and battery coolant loops. This
module heats the coolant based on
temperature inputs from the cabin
climate control systems.
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