Battery; Straightforward Charging; Learning Cycle; High Degree Of Safety Due To Battery Management - Bosch Drive Unit Speed Manual Original

7 Battery

Your battery is a lithium cobalt battery, the ideal type of
lithium-ion (Li-ion) battery for this application. One of the
main benefits of this type of battery is its low weight com-
bined with a high capacity. Li-ion batteries only weigh half
as much as comparable nickel metal hydride or nickel-cad-
mium batteries. This means you carry less battery weight
and more battery power.
7.1

Straightforward charging

› There is no memory effect. You can therefore fully
recharge your battery after every trip.
› Recharge the battery after every trip. This means
you can set off immediately the next time you use
your bike and you also increase the service life of
the battery.
› If you are not using the battery, you only have to
recharge it after 6 months.

7.1.1 Learning cycle

Once you have fully charged the battery for the first
time, you must run it down until the system switches
off. This procedure (a so-called "learning cycle") is
necessary so that the battery management recognises
the changes in the capacity caused by age and wear
and tear, in other words, the performance level of the
battery.
Afterwards, the capacity of the battery is calculated
anew and correctly represented.
With this procedure, you can prevent a sudden loss of
electrical assistance during an extended trip.
26 V User Manual Impulse Pedelec
7.2 High degree of safety due to battery
management
› The battery cannot be damaged as a result of a
short-circuit. If this were to happen, the battery
management would switch off the battery.
› You can simply leave the battery standing in the
charger as it has in-built overcharging protection.
7.3

Straightforward storage

› If you do not need your battery for a while, store it
at a temperature of +10°C at three quarters of its
full charge capacity.
› The battery management switches the battery to
sleep mode to prevent it from totally discharg-
ing. This can occur after different lengths of time
without being used. Depending on the charge state
of the battery, this can occur earlier with a lower
charge and later with a higher charge. At the latest,
the management system activates the sleep mode
after 10 days without using the battery. The system
exits sleep mode when you connect the battery
to the charger or press the "Push" button on the
battery.
These benefits are available due to highly effective battery
management that has been adapted to this specific applica-
tion and by tuning the battery for operation with a 250 watt
motor.