GE H48651KR, Service Manual

Page: 265 / 516

GE V
OLUSON
i / V
OLUSON
e
D
IRECTION
KTI106052, R
EVISION
10 S
ERVICE
M
ANUAL
Chapter 5 - Components and Functions (Theory) 5-33
5-5-6 Battery Charger
5-5-6-1 Introduction
The system is provided with an internal and an optional external battery charger.
The internal Battery Charger is capable of charging the battery pack with up to 0.5C (~3.3A) while
keeping the overall dissipated power below a rated power. The charging rate is controlled based on
keeping the current capacity of AC adapter.
The Battery Charger is used to charge the lithium-Ion battery pack that is composed of 12 cells of lithium
battery arranged in three parallel groups of 4 serially connected cells.
The Battery Charger is in compliance with Level 2 of Smart battery Charger Specification Revision 2.0.
Battery Charger specifications are listed in Table 5-6 below.
Charging Condition:
• Method: Constant Voltage and Constant Current Method
• Voltage: 4.2+/-0.05V /cell
• Current: 0.1A/cell ~ 1.1A/cell (C/5~0.5C)
The PS controller guarantees that under all load and battery conditions the total power consumed by
both the charger and the loads is within the maximum rated power of the unit. When the battery is fully
loaded the charger is disabled and powered-down to reduce any internal power dissipation.
Table 5-6 Battery Charger Specifications
Description Minimum Nominal Maximum
Output Voltage
12V 14.4V 16.8V
Charging Current
N/A
0.5C
(~3.3A)
Charger Efficiency
93% 95% 96%
Temperature - Charge 0
o
C 45
o
C
Temperature - Discharge -20
o
C 60
o
C
Temperature - Storage -20
o
C 60
o
C