Shandong Province, as a major energy province in China, is actively promoting the transformation of its energy structure and striving to increase the proportion of non fossil energy consumption. With the rapid development of new and renewable energy, especially the continuous growth of wind and photovoltaic power generation capacity, the installed capacity of new and renewable energy generation in Shandong Province has exceeded 106 million kilowatts, accounting for 46.9% of the total installed capacity, surpassing coal-fired power generation capacity historically (46.88%). However, the randomness, volatility, and intermittency of new energy generation pose significant challenges to the regulation of the power grid. With the increasing maximum peak valley difference of the power grid year by year, it is urgent to increase peak shaving resources and enrich peak shaving methods to enhance the regulation capacity of the power grid. Energy storage, as a new form of energy development, can not only increase the electricity load during off peak periods, but also enhance the power supply capacity during peak periods. It is currently one of the most effective measures to solve the problems faced by power operation.

In response to project requirements, the total capacity of the engineering design and construction is 300MW/600MWh, and the current design and construction capacity is 100MW/200MWh (Phase I). Jinshi Technology's new generation "JSKJDC5000-A2" liquid cooled battery energy storage system is selected. The system adopts an integrated design, integrating advantages such as long cycle life, fast response, safety and reliability, flexibility and compactness, and moderate cost. Given the particularity of the power grid, operational safety is the primary consideration for its operation, and equipment with low safety cannot enter the grid.

In this project, each energy storage DC system consists of a DC main control distribution cabinet and multiple liquid cooled battery cabinets. The liquid cooled battery cabinet adopts a modular design, and the fire energy storage part is provided by industry-leading enterprise Qianye Technology (a subsidiary of Jinshi Technology), ensuring that all safety issues can be warned in a timely manner and prevented in advance. The protection level of the battery module in the device is IP67, the protection level of the battery cabinet is IP54, and the anti-corrosion level of the battery compartment is C4.

The core purpose of adopting energy storage systems is to ensure the safe, efficient, and stable operation of the power system. Only energy storage systems with high safety can meet this requirement. In extreme cases, even if the energy storage battery fails, it still needs to be within a controlled range. In terms of thermal management design, Jinshi Technology adopts the "Box System Hierarchical Thermal Design" scheme. Compared with traditional design schemes, this scheme significantly improves the uniformity of system temperature distribution, ensures uniform flow distribution of each pack in the system, achieves multi-path heat release, and achieves efficient temperature control.