PRESS RELEASE
Recently, a 50kW/150kWh energy storage container was assembled and tested at GreatWall Power Plant and shipped to the energy center of an industrial park in Shanghai.
The 50kW/150kWh energy storage container provided by GreatWall Power Supply Division provides support for a micro grid system in the energy center. The micro grid system consists of 25kW wind power, 20kW photovoltaic, 50kW/150kWh energy storage, and the load (about 50kW).
When the grid has electricity, it uses the wind and photovoltaic energy preferentially to supply power to the load. The excess energy charges battery, after the battery is full the excess energy goes to grid. When grid power failed, the micro grid runs in off-grid mode and uses wind, photovoltaic, and battery power to power the load.
The energy storage system has functions such as peak-to-valley energy storage, peak and frequency modulation, active and reactive power regulation, zero-voltage ride through, etc.
The configuration of energy management system(EMS), which is independently developed by GreatWall Power, makes the storage system uses renewable energy efficiently, and provides both remote and local monitoring modes, real-time monitoring of real-time operating data.
The highlight of this project is that all 150kWh lithium batteries are retired electric vehicle batteries. The battery packs are used directly after test without being disassembled and repacked.
With retired battery management system pioneered by GreatWall Power, safely, quickly, and cost-effectively utilization of retired power battery can be fulfilled, which also set an industry benchmark.
The GreatWall Power ES50 energy storage converter used in this project has two channels, which supports independent input of two battery packs. Each channel has wide voltage range of 50-750V, which can independently access two different types of batteries, and is very suitable for reuse of power batteries.
After completing the assembly of the energy storage system, Great Wall Power technicians used wind-PV micro grid system and the test platform in GreatWall Industrial Park to test the system, testing items including the following: power grid peak and valley energy storage, PV energy storage, wind energy storage, wind/PV hybrid energy storage, peak and frequency modulation energy storage, high rate charge and discharge test, etc.
The delivery of this retired power battery storage system indicates one road for the use of large batches of retired EV batteries and has long-term significance for environmental protection.
