Technical data

The Multi-Cell Charger/Discharger
(MCCD) is a cost effective solution
specifically designed for manufac-
turers to charge and discharge
secondary lithium-ion and lithium-
polymer cells. It has 256 charging
and discharging channels each
rated at up to 5 V and 3 A.
The E4371A Powerbus Load is used
for discharging purposes within a
formation system and can dissipate
power from two fully loaded MCCD
mainframes. For the discharging
cycle, it is required to dissipate
excess power from discharging cells.
Additional electricity savings are
realized because energy removed
from discharging cells is automati-
cally used to simultaneously charge
other cells. This energy recycling
contributes to cooling and ventila-
tion savings because all of the
energy removed from cells is not
dissipated in unwanted heat.
Agilent Application Specific dc Power Supplies tailored solutions for specific needs
Specifications
(at 0
˚
to 40
˚
C)
Power Products Catalog 2002-2003 For more detailed specifications see the product manual at www.agilent.com/find/power
74
Easy system integration
Integrated safety and protection features
Accurate measurements
Grouping capability
Fully programmable
E4370A
Agilent Application-Specific
dc Power Supplies:
Multi-Cell Charger/Discharger (MCCD)
Condition Value for Value for
E4370A with E4370A with
E4374A E4375A
Maximum programmable charging 5 V 5 V
output voltage
Maximum compliance charging 5.5 V 6 V
voltage (cell voltage +
fixture/wiring voltage drops)
Maximum programmable charging or discharging, 2 A 3 A
output current per channel
Minimum output current
1
constant voltage 0 A 0 A
charging and
discharging
Maximum output disabled, per channel, ±25 µA ±25 µA
leakage current with an external
voltage of -5 V to +5 V
Maximum power charging, per channel 11 W 18 W
discharging, per channel 9 W 13.5 W
Maximum input voltage discharging 4.5 V 4.5 V
Voltage programming measured at sense ±1 mV ±1 mV
and readback accuracy connector input with
remote sensing
Current programming
% of reading + offset ≤1 A ±(0.05% + 1 mA) ±(0.05% + 1.5 mA)
and readback accuracy 1 A to ≤2 A ±(0.1% + 1 mA) ±(0.1% + 1.5 mA)
>2 A ±(0.15% + 1.5 mA)
dc and ac resistance % of reading + offset ±(1% + 1 mΩ) ±(1% + 1 mΩ)
measurement accuracy
Minimum programmable constant current 25 mA 25 mA
constant current limit charging and
discharging
Notes:
1
There is a minimum programmable current limit when operating in constant current (CC) mode. In CC, the
output cannot be set to run below the minimum programmable constant current limit specified in the minimum
programmable consant current limit. In constant voltage (CV) charge or discharge, the MCCD will regulate
current down to 0 A.