XOLTA BAT-80, Руководство пользователя

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of 80 temperature sensors per battery rack. This number of temperature sensors allows for quick detection of
local temperature gradients and thus ensures system safety and equal cell performance during the system
lifetime. Temperature sensors are also located on all battery safety-related PCBs.
The thermal performance of the XOLTA Outdoor BESS is also monitored by the site controller and allows for
power/current de-rating whenever the cell temperature or the ambient temperature is outside a strictly
determined range. The site controller also allows for converter error handling and automatic connection/
disconnection of battery racks.
The XOLTA Outdoor BESS is also built with a special closed metal housing designed to prevent fire propagation
between battery modules in the extremely unlikely event of battery thermal runaway. The cabinet is made
of vandal-resistant steel.
The XOLTA Outdoor BESS constantly monitors the isolation resistance between the high voltage battery
terminals and the ground. Isolation fault protection allows for detecting safety issues with battery systems
(e.g. due to leaking battery cell, failure in cable insulation).
Finally, every XOLTA Outdoor BESS can be equipped with an external emergency stop button which disconnects
the battery racks from the grid. The emergency stop button should be installed by an electrician when
connecting the BESS to the grid .
3.3.2 Internal electrical protection schematics of the XOLTA Outdoor BESS
Figure 3.3 illustrates the protection scheme used inside the XOLTA Outdoor BESS. The protection
schematics include the following main components:
• one fast DC fuse located in each battery pack
• two fast DC fuses located in the BPU
• two DC contactors controlled by the n-BMS (2 contactors per BPU); the state of the contactors is
monitored by nBMS
• one 10A AC fuse for protection of the BPU power supply
All metallic parts of the battery rack, battery packs and BPU are grounded. In addition, all battery converters
(PCS) provided as a part of the XOLTA Outdoor BESS are grounded and protected (overcurrent, overvoltage,
overtemperature protection) to ensure safe operation of the PCS.
Figure 3.3:
Illustration of
electrical protection
schematics used
for the XOLTA
Outdoor BESS
RACK n
F F
F
R R
F
F
F
F
F F
F F F
F
F F
F F
F
F F F
F
P+N+PE 3P+PE
RACK 1
F F
F
R R
F
F
F
F
F F F F
F F F
F
F F
F F
F
F F F
F
P+N+PE 3P+PE