Bosch BULLS Twenty 6 EVO, Translation Of The Original Operating Instructions, Page: 20 / 116

MY20B01 - 52_1.0_02.10.2019
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Overview
3.1.4 Electric drive system
The 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 14: Diagram of mechanical drive system
1 Direction of travel
2 Chain
3 Rear chain wheel
4 Front chain wheel
5 Pedal
The pedelec also has an integrated electric drive
system.
The electric drive system is made up of 8
components:
Figure 15: Diagram of electric drive system
1 Headlight
2 Display
3 Control panel
4.1 Integrated battery
4.2 Frame battery and/or
4.3 Pannier rack battery
5 Rear light
6 Electric gear shift ( alternative)
7 Motor
8 A charger which is designed for the battery.
As soon as the required muscle power from the
rider pedalling passes a certain level, the motor is
activated gently and assists the pedalling motion
of the rider. The motor force is determined by the
set level of assistance.
The pedelec does not have a separate emergency
shut-off button. The drive system can be stopped
in case of emergency by removing the
display . The
mechanical brakes are used as an emergency
stop system and bring the pedelec to a halt quickly
and safely in the event of an emergency.
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 push assist
continues to drive the pedelec as long as the rider
presses the
push assist button . The speed can
be a maximum of 6 km/h in this case. The drive
stops when the
plus button is released.
3.1.5 Rechargeable battery
Bosch batteries are lithium ion batteries which are
developed and manufactured to the latest
technical standards. Each individual cell is
protected by a steel cup and encased in a plastic
battery housing. 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
pedelec. The battery temperature is monitored at
all times. The battery is protected against deep
discharge, overcharging, overheating and short
circuit. In the event of a hazard, a protective circuit
switches the battery off automatically.
The battery has a high energy content when
charged. You will find codes of practice for their
safe handling in Section 2 Safety and Section 6.9
Rechargeable battery in the operating instructions.
If the electric drive system is not used for about
10 minutes and no button has been pressed on
the display or the control panel, the electric drive
system and the battery are automatically switched
off to save energy.
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