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Bosch Rexroth AG | Tightening Technology
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NX-BP36V:
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NX-BP2-36V:
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Series connection of 10 lithium-ion cells
Fig. 3–7:
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
The power supply of the integrated controller is maintained for approx. 20 seconds if the battery is
changed, see also
3.1.6.3
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. A battery is therefore not overcharged in the charger, even when plugged
in for a longer period of time. 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.
Cell voltage 3.6 V multiplied by 10 cells = 36 V battery voltage
Battery capacity = cell capacity = 2 Ah
This results in a battery energy content of 36 V multiplied by 2 Ah = 72 Wh
The performance of the Nexo slide-in battery pack could be increased by 20 % to 2.6 Ah.
Cell voltage 3.6 V multiplied by 10 cells = 36 V battery voltage
Battery capacity = cell capacity = 2.6 Ah
This results in a battery energy content of 36 V multiplied by 2.6 Ah = 93.6 Wh
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3.6 V
3.6 V
3.6 V
3.6 V
2.6 Ah
2.6 Ah
2.6 Ah
2.6 Ah
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NX-BP2-36V series connection of 10 lithium-ion cells
Shortening of power supply on battery change on page
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3.6 V
3.6 V
3.6 V
3.6 V
2.6 Ah
2.6 Ah
2.6 Ah
2.6 Ah
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Nexo cordless Wi-Fi nutrunner | 3 608 870 A47/2019-10
3 608 870 A47
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3.6 V
3.6 V
2.6 Ah
2.6 Ah
36 V
2.6 Ah
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273.
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