Bedienungsanleitung Kettler Velossi 2.0 (Seite 16 von 82) (Englisch)

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MY20K10-02_1.0_10.11.2020 16

Overview

In the case of motors, this heat is dissipated to the

fork end or rear of the bicycle frame via a large

contact surface on the motor interior (stator

support). Cooling fins inside and outside the drive

casing ensure maximum heat exchange with the

surrounding area. Any heat that cannot be

dissipated causes the drive motor to heat up.

The wheel hub motor monitors both the supplied

energy and the temperatures reached in the

motor. This prevents damage due to overheating

caused by an overload situation. However, this

causes a reduction in the motor power that the

rider can use so that overheating can be

prevented.

The higher the temperature rise in the engine, the

less driving power there is that can be accessed

and the less assistance there is available. If the

engine cools down, the energy supply is

increased again and the driving power increases.

Important: the motor cannot be damaged by

heating.

IMPORTANT: the motor cannot be damaged by

heating. Control of the driving power in relation to

the motor temperature is continuously variable to

ensure assistance is always available but the

motor cannot be damaged by overheating.

PRACTICAL USE: In daily use, the points listed

above depend on the outside temperature, the

total weight, the gradient, the ground conditions,

the pedalling rate, the air pressure and the speed.

These factors can lead to a temperature being

reached that reduces power or assistance.

However, this does not mean that the drive is

faulty or is failing. The rider can continue their ride

with a low level of assistance.

EXTREME EXAMPLE: A gradient of 12% over

500 metres of altitude, a total weight of 120 kg, a

maximum assistance level, a driving speed of

< 10 km/h and a pedalling rate of 60 rpm mean

that the bike is operating under unfavourable

conditions with low efficiency, a reduced range

and high heat emission. This may lead to a

reduction in driving power.

Recovery

The motor can recharge the battery as a generator

(recovery). Electricity is generated to charge the

battery. Recovery also causes a gentle braking

effect. The lower the battery level is, the harder

the braking effect is felt.

The two recovery levels can only be activated if

the following conditions are met:

• Recovery can only be activated within a speed

range between 6 and 75 km/h. Recovery cannot

be activated when the vehicle is stationary or

travelling at under 6 km/h.

• The battery temperature must be greater than

0 °C. Recovery is automatically deactivated

under 0 °C.

• If the battery exceeds the maximum charging

temperature of 50 °C, the battery's charging

function is deactivated and recovery cannot be

used. This function is enabled again as soon as

the battery falls below this temperature limit.

• The battery charge level is less than 90%.

3.1.4.2 Rechargeable battery

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 battery is protected by a steel

cup and cased in a plastic housing. You must not

open this housing. You must also avoid

mechanical loads or exposure to intense heat

since they may damage the battery cells and

cause flammable contents to leak out.

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. The substances in lithium-ion battery

cells may become inflammable under certain

conditions. You will find codes of practice for their

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Kettler Velossi 2.0 Seite 16

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