Energy Storage Systems
Sara Incorporated in cooperation with Danfoss
Danfoss Industries and Sara Incorporated commissioned a 270 Kw/Hr Battery Energy Storage System, S-Grid, at Danfoss’s India Plant to provide system flexibility while charging it from the 1.2 MW Solar plant installed on the premises.
Danfoss Industries Pvt Ltd. (Subsidiary of the 7 Billion Euros in sales Danfoss Group with its HQ in Denmark) and Sara Incorporated, inaugurated India’s first privately owned and managed grid-scale battery-based energy storage system, S-Grid, in Oragadam, Chennai. The 270 kilowatt-hours (KWh) system, designed and commissioned by Sara Incorporated, will pave the path for the wider adoption of grid-scale energy storage technology across India.
Battery-based energy storage enables electricity to be stored and then delivered within milliseconds, reducing the instability of the electric grid and enabling more energy to be captured and delivered on-demand. India has the ambitious vision of installing 250 GW of renewable energy generation by 2025.
Battery-based energy storage provides the flexibility and agility to better integrate intermittent solar and wind energy resources into India’s electric grid and ensure high-quality power for consumers.
S-Grid, a 270 KW/Hr project, is located at Oragadam, Chennai, and will be charged by the 1.2 MW Solar Plant at Danfoss’s facility. This system is part of the journey at Danfoss to become carbon-free by 2030. Danfoss also proposes to add a charging station to this system to enable a fully green vehicle with no fossil fuel requirement for charging.
|Nominal Cell Voltage||3.2|
|Nominal Battery Voltage/Min/Max||880/920/1000V|
|Installed Capacity||270kWh (288 x 100S3P)|
|Usable Energy at 80% DOD||215 kWh|
|Usable Energy at 75% DOD||200 kWh|
|Power Delivery & Charging|
|Nominal/Max discharging Current (0.5C/1C)||135/270A (Fuse protection at 400A)|
|Max Charging Current (0.5C)||135A (Two-hour Charge rate)|
|Expected Cycles @ 70D0D @1C||>4000 Cycles (.5C Charge and Discharge)|
|Expected Cycles @ 80DOD @1C||>3000 Cycles (.5C Charge and Discharge)|
|Efficiency @ C1||+-90%|
|Temperature||Charge -25°C-55°C Discharge -20°C-65°C|
|Battery Management System (BMS)|
|Digital Battery Management System||Master-Slave topology|
|CMS (Cell Management System)||12 LiFeP04 per CMU (24xCMU Modules)|
|Communications||Can Bus diagnostics interface|
|ISOSPI Bus internal comms|
|CAN bus 2.0 A&B|
|MCU - Isolated Power Supply||6-35V Power from the main pack - No ups needed|
|MCU Power Consumption||<3.2W @ 12V <20mW @ 12C in sleep mode|
|CMU- Power Supply||Minimum 3 Cells 6-40V|
|CMU- Power Consumption||<0.6W for 12cells (operating) <0.3mW (sleep mode)|
|Temperature Measurements||Cell-Level and CMU level (Total of 288)|
|Protection||120 + Error messages|
|Weight (without Cells)||300 kg|
|Weight (with Cells)||2000 kg|
|EMS & Control||Siemens S7 1200|
|User Communications||Can-BUS(Isolated & non Isolated) Profi Bus, RS232|
|TCP/IP: Modbus - Profi Net|