l Do not connect the positive and negative polarities of the battery reversely.
l During the test, ensure that all the cables are connected reliably and tightly. Otherwise, the
circuit may catch fire or be overheated after the circuit is closed, which may burn the battery
and cause accidents when the problem reaches a serious extent.
l Do not over-charge the battery. Otherwise, the life span of the battery may be shortened.
When the constant voltage is 2.35 V/cell and the limited current is 0.15 C
10
A, the maximum
charge time cannot exceed 24 hours.
A.3.3 Operation Process
This topic describes how to perform the battery supplementary charge.
Context
The cable must be connected properly based on the requirements in "Precautions."
Procedure
Step 1 Connect the battery that needs the supplementary charge with the cable properly. Ensure that
the bolts of each connection point are tight, and then connect the positive and negative polarities
of the battery group respectively to the positive and negative polarities of the charge device.
CAUTION
This helps to prevent device faults or connection and setting errors from damaging the battery.
You should add an circuit breaker in the serial connection mode between the battery and the
device loop. The capacity of the circuit breaker should be designed 1.5 times as the maximum
current of the loop.
Step 2 Run the power charge command to set the battery charge mode, value of charge voltage, and
value of charge limited current.
NOTE
Each parameter of the battery is set as follows:
l The battery charge mode is equalized charge.
l The battery charge voltage is (2.35±0.02) V/cell. Where:
l For the -48 V power system, the charge voltage is 56.4 V.
l For the battery group that consists of 12 V single batteries, the charge voltage is 2.35 V/cell x 6 x
battery quantity.
l For the battery group that consists of 2 V single batteries, the charge voltage is 2.35 V/cell x battery
quantity.
l The limited current of the battery charge is 0.15 C
10
A.
Step 3 Close the loop air breaker, start the device, and charge up the battery.
Step 4 When the battery charge current is equal to or less than 0.005 C
10
A, prolong the charge for three
or 16 hours based on requirements.
UA5000 Universal Access Unit Product
Commissioning Guide-PVM CLI A Additional Information
Issue 04 (2012-06-25) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
119
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