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TRANSCRIPT
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BYD Battery Storage Solution
Tina MuProduct Manager
www.byd.com/energyCONTENTS
Switzerland system introduction
References projects
Technology and performances
Applications
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50KW 130KWh ESS in Bern, Switzerland
Latitude : 46.57⁰Longitude : 7.26⁰Altitude: 540mTime Zone: 1Global irradiation : 1119.5kwh/m²/year
PV system : 30.72kWp
Switzerland System Overview
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Grid
Grid
Grid
Working mode
1. PV to supply load and charge ESS
2. When ESS fully charged
3. PV and ESS to supply load
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Grid
Grid
Grid
4. PV ,ESS and grid to supply load together
5.ESS to supply load
6. ESS fully discharged ,then only grid to supply load
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ESS configuration The energy storage system provides 380V/50Hz 3 phase 4
line output . including following parts:• Lithium Iron Phosphate battery(LiFePO4) system with
130kWh usable capacity
• Battery Management system(BMS)
• 50kW Power conversion system(PCS)
Topology of the system:
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Battery cell, module and cabinet
Single cell, 3.2V 200Ah
Module 4pcs cells in series 12.8V 200Ah
59pcs modules in series, 755V 200Ah
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Battery Management System(BMS)The BMS including :
• Battery Management Unit(BMU)
• Battery Gateway Unit(BGU)
• Battery electrical control Unit (BECU)
• Battery Stack Management Unit(BSMU)The BMS is with functions of battery status monitor, operation control, insulation
monitor, dynamic balancing management, protection alarm and communication
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Power conversion system (PCS)
Structure diagram
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Pictures of the system
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Pictures of the system
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Volta
ge /
V
Capacity
LiFePO4 + 6C Charge
FePO4 + LiC6Discharge
Core of Energy storage: LiFePO4 Battery
Technology
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Energytype
Powertype
Application-oriented production
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Power type 16Ah cellCharge curve
Performances
Discharge curve
0
20
40
60
80
100
120
0 1000 2000 3000 4000 5000 6000
Capacity retention
,%
1# 2#
4C -4C , RT
Cycle life test @RT
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Charge Curve@ RT
2.22.42.62.83.03.23.43.63.84.0
0% 20% 40% 60% 80% 100%SOC （%）
Vol
tage
(V)
0.1C 0.2C 0.5C1C 2C
2C rating 50Ah cell
Performances
Discharge Curve@ RT
1.82.02.22.42.62.83.03.23.43.6
0% 20% 40% 60% 80% 100%DOD(%)
Vol
tage
(V)
0.1C 0.2C 0.5C1C 2C 5C
0.00
20.00
40.00
60.00
80.00
100.00
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Capacity retention
，
%
1#
2#
2C-2C，RT
Cycle life test @RT
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2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
0% 20% 40% 60% 80% 100%
Voltage (V)
Available Capacity (%)
C-rate Charge Curve @ RT
0.5C 1C 2C
Energy type 220Ah cell
Performances
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
0% 20% 40% 60% 80% 100%
Voltage(V)
Available Capacity(%)
C-rate Discharge Curve @RT
0.5C 1C 2C
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
0% 20% 40% 60% 80% 100%
Voltage(V)
Available Capacity(%)
Discharge at Different Temp.
25℃ -20℃ 60℃
0
20
40
60
80
100
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
Capacity retention,%
1C -1C, RT
1# 2#
Cycle life test @RT
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Cycle Life at room temperature and 45°
Performances
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BYD Iron-phosphate Batteries in Service
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Production capacity (GWh/Year)
2012 2013 2014 2015 2016
1.6 1.6
3.1
4.6
7.6
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ESS storage energy from grid
ESS grid-tie output when need
Ø Black start option;
Ø Load leveling;
Ø Spinning reserve;
Ø Voltage and Frequency regulation;
Ø Smooth the output of wind & solar generation
When grid abnormal, ESS operate in island mode
Ø 4 quadrant operation
Ø On/off grid operation
ESS Applications
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small-scale version of a centralized electricity system
Micro-grid systemApplications
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Home based system
Applications
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DESS AC DESS DC DESS Hybrid
For solar generator retrofits
For new installations For flexible setups – i.e. Solar inverter and BHKW
All systems available in 10 and 20 kWh capacity versions (85% DoD).3- and 1-phase versions available.
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• 2012 – Charlotte, North Carolina– 200kW/500kWh, 1-40‘container ESS– 480V, 60Hz AC
• 2012 – Doha Qatar– 250KW/ 500KWh, 1-40‘container ESS– 415V, 50Hz AC
• 2011 – Hebei, China– 6MW / 36MWh ESS– One of the Largest Battery Storage Station
References Projects
