MY20K10 - 12_1.0_11.01.2021
18
Overview
3.1.4
Electric drive system
The S pedelec is driven by muscle power applied
to the chain drive. The force which is applied by
pedalling in the direction of travel drives the front
chain wheel. The chain transmits the force onto
the rear chain wheel and then onto the rear wheel.
Figure 10: Diagram of mechanical drive system
1
Direction of travel
2
Chain
3
Rear chain wheel
4
Front chain wheel
5
Pedal
The S pedelec also has an integrated electric
drive system in addition to its mechanical drive
system.
The electric drive system is made up of
8 components:
Figure 11: Diagram of electric drive system
1
Headlight
2
On-board computer,
3
Operating element
4.1
Integrated battery
4.2
Frame battery
4.3
Pannier rack battery
5
Rear light
6
Electric gear shift (alternative)
7
Motor
8
A charger designed for the battery.
3.1.5
Motor
As soon as the required muscle power from the
rider pedalling passes a certain level, the motor is
activated gently and assists the rider's pedalling
motion. The pre-set level of assistance
determines the motor output.
The motor switches off automatically as soon as
the rider no longer pedals, the temperature is
outside the permitted range, there is an overload
or the shut-off speed of 25 km/h has been
reached.
A push assist system can be activated. The speed
depends on the selected gear. The motor
continues to drive the S pedelec as long as the
rider presses the
push assist button
on the
handlebars
. The speed can be a maximum of
6 km/h in this case. The electric drive system
stops when the
push assist button
is released.
The S pedelec does not have a separate
emergency shut-off button. In the event of an
emergency, the motor can be stopped by
removing the
on-board computer
. The mechanical
brakes are used as an emergency stop system
and bring the S pedelec to a halt quickly and
safely in the event of an emergency.
3.1.6
Rechargeable battery
Bosch batteries are lithium ion batteries which are
developed and manufactured to the latest
technical standards. These batteries meet and
exceed applicable industrial safety standards.
The battery has an internal electronic protection
circuit, which is specifically designed for the
charger and the S pedelec. The battery
temperature is monitored at all times. Each
individual cell in a Bosch battery is protected by a
steel cup and cased in a plastic housing. You must
not open this housing. You must also avoid
1
2
5
4
3
B
1
3
4.1
4.3
4.2
5
6
7
2
