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3 608 870 A47
Series connection of 10 lithium-ion cells
Fig. 3–5:
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The rule "the weakest link defines the strength of the entire chain" also applies to series connection of
battery cells. The series connection of individual battery cells is similar to the links of a chain. For this rea-
son, Rexroth uses selected cells with absolutely equal capacities to provide users with the promised en-
ergy.
Change of the battery pack slide-in module
In case of battery change, the power supply of the integrated controller is maintained for 20 seconds. In
case of high data transmission via WLAN, this time the power supply is maintained is reduced to approx.
10 seconds.
3.1.4.3
Single charger NX-BC36V
Lithium-ion batteries are generally charged using the CC/CV process. This means, a constant current is
applied to charge the battery until the charger switches to constant voltage near the charging end voltage.
Both parameters (charging current and charging end voltage) have a considerable effect on the service
life of the battery. The temperature of the battery is also a crucial charging parameter. Batteries can often
be discharged at higher temperatures than charged.
Communication is established as soon as the battery is plugged into the charger. Between the battery
and the charger, important parameters are exchanged. This ensures that only faultless batteries of the
Nexo series are charged and that each battery is treated according to its parameters.
The charger charges the battery at a constant current. On reaching the charging end voltage, the charger
switches to constant voltage. This way, excessive battery charging is prevented even it is plugged into
the charger for longer periods. Nevertheless, charged batteries should be unplugged from the charger to
avoid power consumption of the electrical switchgear even if it is switched off.
The Nexo charging system cools the battery during charging. A fan integrated into the charger guides the
air through the bottom of the battery via the contact interface into the charger and out through the vents
in the base.
Nexo cordless Wi-Fi nutrunner | 3 608 870 A47/2017-05
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3.6 V
3.6 V
3.6 V
3.6 V
2 Ah
2 Ah
2 Ah
2 Ah
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Series connection of 10 lithium-ion cells
3.6 V cell voltage multiplied by 10 cells = 36 V battery voltage.
Battery capacity = cell capacity = 2 ampere hours
This results in a battery energy content of 36 V multiplied by 2 ampere hours = 72 watt hours
Tightening Technology | Bosch Rexroth AG
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3.6 V
3.6 V
3.6 V
3.6 V
2 Ah
2 Ah
2 Ah
2 Ah
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45/263
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+
3.6 V
3.6 V
2 Ah
2 Ah
36 V
2 Ah
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