Battery Charging Functions; Security Functions - Panasonic EBL128 Planning Instructions

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: -
24.1.1
24.1.2
If this section is to be fulfilled, max. 18Ah batteries can be used since
0.7A x 24h ÷ 0.80 = 21Ah
see the table in chapter "Second power source (Battery)", page 170.

Battery charging functions:

Battery charging is performed in two steps:
1. Constant charging current. The charging current is constant
157
(fixed) until the battery / charging voltage is 29 V.
2. Constant charging voltage. The charging voltage is reduced
to something between 27 and 27.6 V (depending on the
battery type, shape, temp. etc.) and will be constant (fixed) at
this level until the batteries are fully charged.
The stand-by "charging current" is 0-0.5 A.
The charging voltage will stay constant (fixed) at the "step 2" level
until the batteries have been discharged and have to be charged again.
A new cycle will start with "step 1". The "step 1" and "step 2" times
are depending on the battery shape when the charging started.

Security functions

 The battery charging will be turned off if the current from the
Rectifier 4557 to the Main board 4556 exceeds 1.8 A, i.e. the
EBL128 current consumption exceeds 0.8 A. The battery
charging will remain turned off as long as the EBL128 current
consumption exceeds 0.75 A. It will generate a fault and the
following fault message will be shown:
FAULT: High current consumption in CU
Date: MM-DD
 Normally every 14
battery voltage below 18.9 V will generate a fault
following fault message will be shown:
FAULT: Battery
Date: MM-DD
NOTE! Regarding this fault and the New Zealand convention, see
chapter "FAULT: Battery", page 121.
 When the battery voltage is below 10 V (5 V per battery), the
battery charging will be turned off. (The batteries are most
certainly damaged and have to be changed.)
156
21 Ah batteries with the required physical size are normally not found on
the market.
157
The charging current is 0.7 A (typical). (Very close to the end of the
charging cycle it will lower.)
158
In the New Zealand convention every 60 seconds and 24.4 V
respectively.
166
EBL128 Planning Instructions V2.0.x
156 TN
. For I in relation to the back-up time,
Time: HH:MM
th
minute the battery voltage is checked. A
Time: HH:MM
158
and the