3 Function Unit in Container

3.1 Battery system

3.1.1. Battery pack

Figure 3-1 Battery PACK

Table 3-1 Battery pack technical data sheet

Figure 3-2 Ports on battery pack Table 3-2 Ports on battery pack explain

3.1.2. Battery string

Figure 3-3 S407-24P16 Battery string layout

Table 3-3 S407-24P16 Battery String Configuration Table

3.2. High voltage Unit

3.2.1. High-voltage unit characteristics

Figure 3-4 High voltage unit

The unit has the ability to disconnect the high-voltage unit is the and control of the battery string from the main system. The details are as follows:

• The power circuit uses contactors, fuses and isolation switch integrated to protect the battery string reliably.

• The unit is also CMU integrated. CMU, as the second-level BMS to collect the data from each cell management unit, BMU, realizes current monitoring and protection of the whole string battery and ensures in-time communication.

• The power supply control in the unit adopts a redundant design of the AC-DC power supply, which supports the black start of the system.

Using reliability is balanced with speed to optimize communication, the important information is uploaded by Modbus.

Table 3-4 High-voltage unit technical data table

Figure 3-5 High voltage unit port

Table 3-5 Ports on the high-voltage unit definition

Power side

Control signal port

COM Passive DO signal common terminal

3.2.2. High voltage unit fuse

Figure 3-6 High voltage unit fuse position

If the fuse is damaged, it needs to be replaced. The replaced fuse must meet the requirements of Table 3-6 Table 3-6 Specification of high voltage unit fuse

3.3. GPC box

3.3.1. Equipment layout

Figure 3-7 Controller appearance

Figure 3-8 GPC box equipment distribution

The GPC box is divided into three layers. The first layer is the door of the control box, on which the touch screen (HMI) device is installed, the second layer is the EMU and PCS connecting plate, and the third layer is the internal device layer of the control box.

The device layer inside the GPC box is divided into upper, middle and lower layers. The upper layer is the power module (KCPS1), switch (SWT), router (TP) and PLC controller, the middle layer is the system internal power supply and signal terminal block, and the lower layer is the reserved system function signal input/output terminal block and relay switch.

Figure 3-9 GPC box equipment

Figure 3-10 Router port definition

Table 3-7 Router port description

Figure 3-11 Fuse core position of GPC box

If the fuse is damaged, it needs to be replaced. The replaced fuse must meet the requirements of Table 3-8.

Table 3-8 Specification of fuse core of GPC box

Figure 3-12 GPC box HMI touch screen

HMI is the human-computer interaction window of the whole system. System control, state monitoring and operation parameter setting are all realized through HMI. HMI can be divided into five interfaces according to different functions: Home Page, Environmental Control System (ECS), Control, Status, and System.

Figure 3-13 HMI display menu tree

3.3.2. Features and functions of the GPC box

• Integrated system visualization window HMI.

• System key information collection, current monitoring of charge/discharge data.

• Data information storage is safe and efficient.

• Automatic recording of events, alert information on the top reminder.

• Topology structure shows system status.

• User rights management at different levels using.

• Support physical network cable transmission and wireless signal transmission.

3.4. Power Distribution Box

Figure 3-14 Distribution box layout

Table 3-10 Distribution box layout description

After passing through the circuit breaker, the AC output of each group of series converters is combined with the AC busbar in the primary distribution box. The busbar is the AC outlet end of the system, where the external transformer or booster bin is connected to the energy storage system.

~L1

~L2

~L¹

Figure 3-15 Copper busbar at AC side of the system

Figure 3-16 Fuse position of distribution box

If the fuse is damaged, it needs to be replaced. The new fuse must meet the requirements of Table 311.

Table 3-11 Specification and parameters of fuse in distribution box

3.5. Environmental control system

The air conditioner is wall mounted. The GPC box according to the operating status of the system switches the air conditioner control to meet the needs of normal temperature control when equipment insides are in operation.

Figure 3-17 Air conditioner(MC50HDNC1A)

• Embedded installation, independent wind cycle;

• Supports MODBUS protocol, can start, stop and adjust temperature and humidity, start and stop compressor;

• Supports automatic and manual operations;

• Service life ≥ 10 years;

• Noise from air conditioner ≤ 50dB;

• Air conditioning protection level > IP55;

• Automatic monitoring of temperature and humidity in the container, temperature control by incoming fresh air or air conditioning.

• Air filtration is carried out at the air inlet, which is removable and replaceable.

Table 3-12 Technical parameter

Power Supply Range 220±15%,50~60 Hz

3.5.2. Temperature and humidity sensor

Figure 3-18 Temperature and humidity sensor

The measurement and transmission functions of the temperature and humidity transmitter are designed in an integrated way, and the large screen display is suitable for the temperature and humidity measurement of HVAC indoor environment. Temperature compensation circuit and linearization processing circuit are adopted. The sensor has high accuracy, long service life and fast response speed, and meets the RoHS lead-free requirements.

Table 3-13 Technical parameter

3.5.3. Water immersion sensor

Figure 3-19 Appearance of water immersion                            Figure 3-20 Schematic diagram of triggering sensor action

Table 3-14 Technical parameter

3.5.4. Gon760 fixed gas detector

Figure 3-21 H₂/CO gas detector

The shell of "Gon760" series fixed gas detector is explosion-proof as a whole. The shell is made of stainless steel or aluminum alloy, and the contact surface with the gas adopts a filter screen that does not produce adsorption on the measured gas or a stainless steel sintered explosion-proof filter screen. The audible and visual alarm is made of anti-corrosion and anti-oxidation materials, with explosion-proof structural design.

Table 3-15 Technical parameter

3.6. Lighting System

3.6.1. Lighting switch

Figure 3-22 Battery room lighting switch Table 3-16 Technical parameter

3.6.2. LED lighting

Figure 3-23 20W LED Linear Light

Table 3-17 Technical parameter

3.7. Emergency power off button of energy storage system

Figure 3-24 Emergency power off button of energy storage system

Table 3-18 Technical parameter

3.8. Fire fighting system (NFfire)

3.8.1. Fire controller

Figure 3-25 Fire controller

Table 3-19 Technical parameter

When off-grid, the fire controller will switch to the built-in backup battery power supply (7Ah * 24V=168Wh). The FFS battery complies with the European Standard EN15004:1 Fixed Fire Protection Systems, Specification for Gaseous Extinguishing Systems: FFS provides at least 24 hours standby and 30 minutes operation in full alarm condition. (Go to section 5.8 to find out how to install the FFS battery).

3.8.2. Photoelectric smoke detector

Figure 3-26 Photoelectric smoke detector

Table 3-20 Technical parameter

3.8.3. Temperature Detector

Figure 3-27 Temperature detector

Table 3-21 Technical parameter

3.8.4. Pressure relief device

Figure 3-28 Pressure relief device

Table 3-22 Technical parameter

3.8.5. Alarm bell

3.8.6. Acousto-optic alarm

Figure 3-30 Acousto-optic alarm

Table 3-24 Technical parameter

3.8.7. Fire emergency stop button

Figure 3-31 Fire emergency stop button

When the fire emergency stop button pressed, the fire extinguishing agent release function of the system is closed.

Conventional manual push button with glass breakage, Blue color IP67. Complete with mounting box.

Table 3-25 Technical parameter

3.8.8. Manual switch with emergency start

Figure 3-32 Manual switch with emergency start

Conventional manual button outside of glass break, Yellow. IP67. Complete with mounting box. Translucent "Extinguishant Release".

Table 3-26 Technical parameter

3.8.9. Water Firefighting interface

Figure 3-33 Water Firefighting interface

The Storz system is a hermaphrodite, symmetrical coupling which is connected by two internal lugs. The connection size of the adaptor is determined by the internal dimension between the lugs (the KA distance).

Table 3-27 Technical parameter

3.8.10.Gas release indicator

Figure 3-34 Gas release indicator

Table 3-28 Technical parameter

3.8.11.Ventilation system control module

Figure 3-35 Ventilation system control module

The ventilation system control module can interconnect the gas detector and the fire control system controller. When the gas detector detects dangerous gases, the ventilation system control module activates the ventilation system to discharge dangerous gases.

Table 3-29 Technical parameter

3.8.12.Exhaust device

Figure 3-36 Exhaust device

Table 3-30 Technical parameter

3.8.13.Air inlet device

Figure 3-37 Air inlet device

Table 3-31 Technical parameter

3.9. Power conversion system

The conversion system can realize the bi-directional energy conversion between the battery and the AC power supply of the grid.

Its core part is an inverter composed of power electronic components and embedded control software.

Figure 3-38 EH-0200-HA-M conversion appearance

Figure 3-39 PCS schematic diagram Table 3-32

Main parameters and specifications

Figure 3-40 conversion configuration

Table 3-33 Appearance structure of the conversion

Table 3-34 LED indicator status description

3.10.Blackout Operation of Energy Storage System

In case of power failure of main power grid and no external UPS connection, the battery system can temporarily supply power to GPC. The fire controller has independent 24V power supply. The HVAC continues to operate after the system starts.

Figure 3-41 Power supply scheme diagram for control system

The AC/DC and DC/DC conversion modules inside the battery high-voltage box provide 24VDC from two sources:

1. When the power grid is normal, the AC/DC module converts 220VAC to 24VDC output,

2. When the grid goes off, the DC/DC module converts the battery cluster 1500VDC to 24VDC output. (Automatic switching of two conversion modules, priority given to AC/DC modules).

In addition, when grid power is normal, the AC/DC module inside the GPC also converts 220VAC to 24VDC output, and after parallel connection with the 24VDC output of the high-voltage box, it provides power to key control equipment.

This dual power supply capabilities and dual sources guarantees uninterrupted power supply of all the key control equipment during grid connection and when off grid. This upgraded power supply architecture allows support for grid forming applications.

The capacity of the battery cluster is 376KWh, the total power consumption of key control equipment such as PLC, EMU, network switch, and gateway is less than 300W, so it can maintain long-term power supply and support the normal operation of BESS control system while off grid.

An additional external UPS input is available on the BESS to provide a third level of power supply backup. It’s optional for the customer to connect an external UPS to provide power supply to GPC and FFS as shown in the Figure 7-1. The external 220VAC UPS power supply can be connected to the DB terminals 0D1:16 and 0D1:17 as shown in the Figure 3-42.

Figure 3-42 External UPS power supply terminals