OTE PUMA T2 - D.2.2 Electrical Description; D.2.3 Electrical Interface; Tab. D.2: Li-Ion Battery (Technical Characteristics)

PUMA T2
Technical Handbook
NiCd, NiMH and Li-ion batteries
Page 120 OTE Proprietary information
P/N: 779-0306/01
Revision 03
D.2.2 Electrical Description
The battery pack is built up of Li-ion cells, the nominal DC voltage is 7.4 V. Some
characteristics are given in Tab. D.2.
Tab. D.2: Li-ion battery (technical characteristics)
Description Value
Capacity 2700 mAh nominal
Charging voltage 8,4 ± 0,05 V
Most common voltage 7,4 V nominal and 3,65 V nominal (discharging @ 23 °C
C/5)
Charging type Limited current , constant voltage
Maximum charging current 2000 mA + 2000 mA
End of charge Low current measurements, redundant timeout
Maximum discharging DC
current
2000 mA + 2000 mA
Low cut-off voltage 4,6 V for continuos discharging
Weight 200 gr. nominal
Operative Temperature Charging : 0 ÷ 40 °C
Discharging : -20 ÷ 60 °C
Description Value
Non operative temperature -20 ÷ 60 °C
Density of volumetric energy Nominal: 360 Wh/l
Nominal: 130 Wh/kg
Safety In compliance with UL 1. External PTC device needed
Depth 16 mm
Width 61 mm
Length 158 mm
D.2.3 Electrical interface
On the bottom side of the battery pack there are five electric contacts
• Negative pole
• Short circuit towards the negative pole
• NTC
• Positive pole
• Auxiliary
A detail of the contacts above listed is shown in Fig. D.4.