Operations Manual | 13
Discharging
a. The discharge can start if the system is in a Standby State or Charge State.
b. If current draw is < -5Amp the system will enter a Discharge State.
c. In Validation Mode discharge will end with Breaker opening via BMS upon any of these conditions:
• Any (1, 2, or 3) Monoblocks < 10V
• Any (1, 2, or 3) Monoblocks > 75C
• EOD Voltage: 380V - 450V
d. In Normal Mode discharge will end once the UPS reaches its Low Voltage Cutoff (typically 383V-400V).
e. After a discharge, all batteries must fall below 40°C before recharge begins.
f. Maximum recommended continuous current is 800A as standard, or up to 1200A with high-current power
path option and 13-90 battery.
g. The breaker is set to trip at 1500A for a dead short circuit.
Note: A negative value signifies the battery is discharging.
Fan Function
a. Battery Temperatures
• Turn Fan On: During discharge - 5s after contactor closes
• Turn Fan Off: (all battery temperatures <35°C) -OR- (all batteries <40°C and fans have been on for 5
hours)
b. Diode and Contactor Temperatures
• Contactor temperature >60°C, turn off <55°C
• Diode temperature >80°C, turn off <75°C
Controls Parameters
BC 2 Ultra
URS
Document: N/A
Revision: 1.2
Date Effective: 18-Apr-2023
©
ZincFive
Corporation
Page 39 of 50
This document contains proprietary information and is subject to the restrictions delineated on
the cover sheet.
5.2 BMS PARAMETER OPERATION, ALARM, ERROR, CRITICAL ALARM TABLE
Item
Parameter
Number of
Batteries
Operation
Min/Max
Warning
Serious
Alarm
Critical
Alarm
1
(X)
Comments
1a
BPOV - Battery pack total voltage overvoltage (V)
36
555
547
555
X
The BPOV is a hard upper limit for EOC Voltage. The normal
EOC is when current is below 4A and system voltage is above a
minimum threshold at BPOV – 18 V.
1b
BPOV - Battery pack total overvoltage (V)
37
570
562
570
X
The BPOV is a hard upper limit for EOC Voltage. The normal
EOC is when current is below 4A and system voltage is above a
minimum threshold at BPOV – 18 V.
1c
BPOV - Battery pack total voltage overvoltage (V)
38
585
578
585
X
The BPOV is a hard upper limit for EOC Voltage. The normal
EOC is when current is below 4A and system voltage is above a
minimum threshold at BPOV – 18 V.
1d
BPOV - Battery pack total voltage overvoltage (V)
39
600
593
600
X
The BPOV is a hard upper limit for EOC Voltage. The normal
EOC is when current is below 4A and system voltage is above a
minimum threshold at BPOV – 18 V.
2a
BPUV - Battery pack total voltage undervoltage
(V)
36
Variable
360
346
X
2b
BPUV - Battery pack total voltage undervoltage
(V)
37
Variable
370
356
X
2c
BPUV - Battery pack total voltage undervoltage
(V)
38
Variable
380
365
X
2d
BPUV - Battery pack total voltage undervoltage
(V)
39
Variable
390
374
X
3
SBOV - Single battery (cell) overvoltage (V)
15.5
15.5
15.6
X
4
SBUV - Single battery (cell) under voltage (V)
4
10.0
7.5
X
