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The manufacturer has unveiled a 155 kWh sodium-ion battery energy storage system for commercial and industrial (C&I) customers. Chinese energy storage system manufacturer Biwatt has introduced a C&I product based on sodium-ion cells. The Powerlake I2 is considered safer than other rival energy storage systems because its cells are thermally inert, meaning they dont self-ignite. The Powerlake I2 is an all-in-one system that integrates energy storage and inverter into a single control cabinet. Its operation is designed to remain stable even under extreme temperature conditions, from -30°C to 55°C. In the event of a power outage, the system can switch to off-grid operation in less than 20 milliseconds, ensuring an uninterrupted power supply. The battery is composed of 230 Ah cells interconnected in 11 kWh modules. Each Powerlake-I2 system contains 14 modules. The input voltage range is 448 V to 885 V. At 25°C, with an 80% depth of discharge and a C-rate of 0.5 for two hours, the battery can be charged and discharged up to 6,000 times. The discharge power at a C-rate of 0.5 is 148 A, and the maximum continuous current power is 100 kW. The output voltage is 400 V. The air-cooled system can operate at altitudes of up to 4,000 m, with a power reduction starting at 2,000 m. The control cabinet weighs 2.2 tons and measures approximately 1.6 m by 1 m by 2 m. With an IP54 protection rating, the system is protected against external influences, but is not suitable for outdoor installation. Sodium-ion batteries are considered an attractive alternative to lithium systems. According to cell manufacturers, they promise high cycle stability, lower costs, and environmental benefits, as sodium is available worldwide as a raw material and could be extracted in a potentially more environmentally friendly way than lithium. |
