High-Voltage Battery - SMART Fortwo 451 Series Introduction Into Service Manual

High-voltage battery

The high-voltage battery is installed under the
passenger cell and consists of the following
components:
• 3 modules of lithium-ion cells of the latest
generation connected in series
• Electronic modules for cell monitoring
• Battery management system control unit
(N82/2)
• Contactors for disconnecting/connecting the
high voltage output
• High-voltage on-board electrical system
connection
• 12 V on-board electrical system connection
• Cooling system
• Coolant line connections
• Desiccant cartridge
• Vent hose connection
High-voltage battery module
1 Coolant line connections
2 12 V on-board electrical system connection
3 Desiccant cartridge
4 Vent hose connection
5 High-voltage on-board electrical system connec-
tion
24 Introduction of smart fortwo electric drive (3rd Generation) • Model Series 451
When fully charged, the high-voltage battery
supplies an output voltage of approx. 391 V. The
high-voltage output can be disconnected from the
high-voltage on-board electrical system by
contactors actuated by the battery management
system control unit. The high-voltage battery also
supplies 12 V on-board electrical system with
power via the DC/DC converter in the power elec-
tronics control unit.
i Note
The high-voltage battery is locked in the
delivery condition and has to be enabled through
initial startup in DAS.
G5 High-voltage battery
N82/2 Battery management system control unit
P54.10-3680-00