Energy storage system

Product Details

Energy storage system

The Energy Storage System (ESS) of Suzhou Langji is a system that can store electric energy and supply power, it includes lithium-ion batteries, BMS systems, PCS systems, EMS systems, etc.


Energy storage system

1. Brief Introduction

The Energy Storage System (ESS) of Suzhou Langji is a system that can store electric energy and supply power, with functions such as smooth transition, peak shaving and valley filling, frequency regulation and voltage regulation etc. It can make the output of solar and wind power generation smooth, and reduce the impact of randomness, interstitial, and volatility on the grid and users; charging during the valley price period and discharging during the peak price period can reduce the user's electricity bill; when it is power outages in large power grids, it can operate in an isolated island to ensure uninterrupted power supply to users.

 

2. Energy Storage System Configuration


Product Feature

1. Smooth transition, peak shaving and valley filling, frequency regulation and voltage regulation etc.;

2. It can make the output of solar and wind power generation smooth, and reduce the impact of randomness, interstitial, and volatility on the grid and users;

3. Charging during the valley price period and discharging during the peak price period can reduce the user's electricity bill;

4. when it is power outages in large power grids, it can operate in an isolated island to ensure uninterrupted power supply to users.


Energy storage systems include lithium-ion batteries, BMS systems, PCS systems, EMS systems, etc.

Host System Data Sheet

AC Outdoor Cabinet-Power

30KW

60KW

Single Outdoor Cabinet Scalable - Maximum Power

90KW

180KW

Battery Outdoor Cabinet - Capacity

81.92 KWh

163.84 KWh

Rated grid voltage

230/400,3P+N+PE


Rated grid frequency

50Hz


Industrial Grade Outdoor Cabinet - Patented Expandable Design

No need for container installation and debugging, and supports the transportation of the whole cabinet with batteries

Low Voltage Power Distribution - Patented Design

Grid-level terminal connection design eliminates the need for independent low-voltage distribution cabinets

Dimension(W*D*H, mm)

789*1180*2450

1577*1180*2450

Installation location

Outdoor

IP Grade

IP55

Operating humidity range

0%~95%(no condensation)

Operating temperature range

-30℃~+50℃(>45℃ derating)

Max working altitude

3000m(>2000m derating)

Communication Interface

CAN,RS485

Cooling method

Precision air conditioning (Langji patented air conditioning)

Cell type

LiFePO4 battery (Brand: Yiwei)

Cell discharge rate

1.0 C

Battery module

5.12KWh

Battery module quantity

16

32

2.1 Technical parameters of battery module

The energy storage battery chooses Hubei Yiwei square aluminum-shell lithium iron phosphate battery with a cycle life of 5,000 times.

  

No.

Item

Specification

1

Cell arrangement

1 parallel 16 strings

2

Nominal voltage

51.2V

3

Nominal capacity

@25 ℃,/51.2V 100AH

4

Working temperature

Charging:0℃~55℃

Discharging:-20℃~55℃

5

Dimension(W*D*H mm):

440*387*136


2.2 Battery Management System (BMS)

According to the system communication capability and system security, the battery management system adopts a three-layer architecture. The slave control collects the voltage and temperature of each group of monomers. The master obtains slave data through communication, and collects voltage and current.

BMS Technical Parameter

No.

Item

Specification

Note

1

System voltage

DC24V


2

Single cell voltage detection range (V)

0V~5V


3

Single cell voltage detection accuracy(mV)

±5mV


4

Temperature detection range(°C)

-40°C~85°C


5

Temperature detection accuracy(°C)

± 1°C


6

Total voltage detection range (V)

0V~1000V


7

Total voltage detection accuracy (%)

1%FSR


8

Insulation detection

Support the highest voltage 1200V, the detection error is less than 10%


9

Current detection range(A)

-300A-300A


10

Current detection accuracy (%)

%FSR


11

SOC accuracy (%)

6%


12

Balance current (A)

100mA


14

Communication method

CAN or 485


15

Display

Industrial display


16

Indicator light, buzzer alarm

With red and green indicator lights and buzzer alarm


17

Protection

Including: overcharge, over-discharge, over-temperature, short-circuit and other protection, and the protection value can be set


2.3 Energy Storage Converter (PCS)

In the energy storage system, in addition to the bidirectional inverter function, the energy storage converter can also support the power grid, ensure the stable operation of the power grid system, provide the ability to resist short-term shocks, smooth power supply, store energy, and shave peaks and fill valleys.

  

PCS Technical Parameter

Model

30KW

60KW


DC side parameters

Max voltage【Vd.c】

1000

1000

Rated voltage【Vd.c】

800

800


Voltage range【Vd.c】

680~1000

680~1000


Maximum charge/discharge current【Ad.c】

44

88


AC grid connection parameters

Maximum input apparent power【kVA】

30

60

Maximum input active power【kW】

30

60


Rated input voltage【Va.c】

230/400,3P+N+PE

230/400,3P+N+PE


Maximum continuous input current【Aa.c】

43

86


Rated input frequency【Hz】

50

50


AC off-grid parameters

Rated output voltage【Va.c】

230/400,3P+N+PE

230/400,3P+N+PE

Rated output frequency【Hz】

50

50


Maximum continuous output current【Aa.c】

43

86


Maximum output active power【kW】

30

60


Maximum output apparent power【kVA】

30

60


Unbalanced load capacity

100%

100%


Overload capacity

1.1 times 1min@Ambient temperature 35℃ 1.2 times 5s



Power factor

Above 0.98

Above 0.98


General parameters

Working temperature range【℃】

-30~+60(>45℃ derating)


IP Grade

IP20

IP20


Working altitude【m】

3000

3000


Max efficiency

98.5%

98.5%


AC and DC start function

Have



Dimension(W*D*H) 【mm】

436*550*130

436*550*130


Weight (KGS)

25

28


Communication

Battery BMS communication interface

CAN、RS485


Superior monitoring communication interface

Ethernet, RS485 (each channel)



Superior monitoring communication protocol

Modbus TCP/ Modbus RTU



General IO port

3-way DI, 2-way DO




2.4 Energy Management System (EMS)

In the energy storage system, the EMS communication topology is divided into two layers, the top layer is the total centralized monitoring system.

 

The underlying equipment: energy storage converter, battery management system (BMS), environmental monitoring equipment, fire protection system, air conditioning or access control system, etc. are all connected to the monitoring system (currently with administrator rights management, soft access control).

 

The monitoring host completes the network connection, conversion, data acquisition, data local processing, protocol conversion and command exchange between the on-site measurement and control systems, local user screen monitoring operation, control strategy, WEB server function, and realizes high-speed collection and transmission of large-capacity real-time data. , to ensure that the master station system can quickly and accurately obtain all monitoring and monitoring information, and timely feedback system abnormalities and faults detected by the network to ensure rapid positioning and recovery. (It needs to be implemented through the site-level BMS)

  

Status bar: At the top of the page, the displayed contents include: operating mode, battery capacity, ambient temperature, and system time.

Energy Data: Displays the energy data of the system.

Running status: In the middle part of the page, the current running status is displayed. The menu bar, at the bottom of the page, from left to right: Home, Devices, Alarms, Data, and Settings.

 

2.5 MPPT Controller Module

The MPPT controller power module adopts the latest optimized hardware design and advanced control algorithm, intelligent control and high reliability

  

MPPT Technical Parameter

Product model

30A

60A

PV side parameters



Maximum input component power【KW】

42

84

Max input voltage【Vd.c】

1000

1000

MPPT voltage range【Vd.c】

200~850

200~850

Starting voltage【Vd.c】

200

200

Number of MPPT channels

1

1

PV input channels

1

1

Max input current【Ad.c】

100

200

DC side parameters



Max DC voltage【Vd.c】

1000

1000

Rated voltage【Vd.c】

800

800

Voltage range【Vd.c】

350~1000

350~1000

Max continuous current【Ad.c】

50

100

Max continuous power 【KW】

30

60

General parameters



Working temperature range【℃】

-30~60(>45 derating)

-30~60(>45 derating)

Working altitude【m】

≤3000

≤3000

Max efficiency

98.5%

98.5%

High and low voltage start function

Have

Have

Dimension(W*D*H)【mm】

436*550*130

436*550*130

Weight【kg】

25

30

 

3. Examples of scalable solutions for energy storage systems

No.

Power

MPPT(Option)

Lithium battery

BMS

EMS

Air conditioning

Fire equipment

Cabinet

1

30KW

30KW

81.92kwh

1 set

1 set

1 set

1 set

1 pc(Power cabinet)

2

60 KW

60KW

163.84kwh

1 set

1 set

2 sets

1 set

1 pc(Power cabinet)

3

120 KW

60/120KW

163.84kwh

1 set

1 set

2 sets

1 set

1 pc(Power cabinet)

4

180 KW

120/180KW

409.6kwh

1 set

1 set

4 sets

2 sets

2 pcs(1 power cabinet+1 battery cabinet)

5

240 KW

180/240KW

655.36kwh

1 set

1 set

6 sets

3 sets

3 pcs(1 power cabinet+2 battery cabinet)

  

4. System equipment list

Scheme A, Equipment list (power 30Kw/battery capacity 81.92kwh)

No.

Equipment name

Specifications

Unit

QTY

Note

1

Energy storage converter

30KW

PC

1

Can be extended to 90KW

2

MPPT Controller module

30KW

PC

1


3

Lithium iron phosphate battery

81.92kwh

SET

1

Including BMS, high pressure box, etc.

4

Air conditioning thermal management system


SET

1


5

Fire Fighting System


SET

1


6

Energy management system


SET

1


7

Power distribution


SET

1


8

Cabinet (battery and power module)

789W*1180D*2450H

PC

1


9

Photovoltaic modules

440W

PC

64


10

Photovoltaic carport


PC

1


11

Accessories


SET

1


  

Scheme B, Equipment list (power 60Kw/battery capacity 163.84kwh)

No.

Equipment name

Specifications

Unit

QTY

Note

1

Energy storage converter

60KW

PC

1

Can be extended to 180KW

2

MPPT Controller module

60KW

PC

1


3

Lithium iron phosphate battery

163.84kwh

SET

1

Including BMS, high pressure box, etc.

4

Air conditioning thermal management system


SET

2


5

Fire Fighting System


SET

1


6

Energy management system


SET

1


7

Power distribution


SET

1


8

Cabinet (battery and power module)

1577W*1180D*2450H

PC

1


9

Photovoltaic modules

440W

PC

64


10

Photovoltaic carport


PC

1


11

Accessories


SET

1








 

 


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