As a key component of energy storage, energy storage cells play a pivotal role in the modern energy system. Its working principle is based on electrochemical reaction, taking the common lithium-ion battery cell as an example, when charging, lithium ions are detached from the positive electrode, embedded in the negative electrode through the electrolyte, and at the same time, electrons flow to the negative electrode through the external circuit to realize the conversion and storage of electrical energy to chemical energy; When discharged, lithium ions are detached from the negative electrode and returned to the positive electrode through the electrolyte, and electrons flow from the negative electrode to the positive electrode through the external circuit to supply power to external devices and complete the conversion of chemical energy to electrical energy. This reversible electrochemical reaction process enables energy storage cells to efficiently store and release energy, providing a guarantee for the stable supply of new energy power.
Recently, the self-developed and self-produced 314Ah high-performance energy storage cells of China Energy Construction Investment Company Zhongneng Ruixin were successfully delivered, which will be applied to the integration of animal husbandry, photovoltaic and storage (Phase I) project in Shapotou District, Ningxia China Energy Construction Investment Co., Ltd. This marks a breakthrough in the field of electrochemical energy storage and injects new impetus into the development of China's new energy industry.
At present, the energy storage cell market is showing a vigorous development trend. As the global demand for clean energy continues to rise, the installed capacity of new energy continues to expand, and the market demand for energy storage, as a key means to solve the problem of intermittent and fluctuating new energy power generation, is growing rapidly. At the technical level, energy storage cells with high energy density, long cycle life and high safety have become the focus and development direction of research and development, and major enterprises and scientific research institutions have increased investment to promote technological innovation. From the perspective of the market structure, the leading enterprises continue to expand their market share by virtue of technology, production capacity and brand advantages, and the industry concentration is gradually increasing.
The Shapotou District Integration Project is a key project in the field of new energy in Ningxia, with an installed capacity of 400MW and a 220MW/880MWh energy storage system. The local climate environment is harsh, and the requirements for the cycle performance, adaptability and operating temperature of the energy storage cells are extremely high, and it is necessary to meet the stable operation of -30°C to 55°C.
Figure: China Energy Construction Investment Company's self-developed and self-produced 314Ah high-performance energy storage cells were successfully delivered (Source: China Power Network).
In the face of strict requirements, Zhongneng Ruixin gave full play to its leading advantages in the field of energy storage cell technology to provide core energy storage support for the project. In terms of improving the cycling performance of the battery cell, Zhongneng Ruixin has realized the comprehensive application of wide temperature range electrolyte technology, interface self-healing technology, rigid SEI membrane technology and multi-functional pre-lithium agent technology, which significantly improves the cycle performance of 314Ah products in a wide temperature range environment and ensures that the battery cell can still maintain stable operation in complex environments.
In terms of safety, Zhongneng Ruixin has fundamentally improved the intrinsic safety performance of the battery through the application of high-temperature resistant separator and safe electrolyte technology; The use of ultra-long life and high-sensitivity explosion-proof valve technology realizes the precise pressure relief of the battery in the whole life cycle and effectively prevents the occurrence of safety accidents. The design of the PFA temperature resistant seal further improves the environmental adaptability and reliability of the battery, ensuring that the battery can still operate safely and stably in harsh environments.
In order to ensure the high-quality production and delivery of the project, Zhongneng Ruixin has added more than 20 foreign body control measures, and improved a number of production standards such as gap standards after entering the shell, ultrasonic welding appearance standards, and capacity separation temperature standards, so as to ensure product quality from the source.
For a long time, China Energy Construction has been actively laying out the energy storage industry, and has been making continuous efforts in the field of battery cell R&D and manufacturing through its subsidiary, Zhongneng Ruixin. The successful delivery of 314Ah high-performance energy storage cells is an important achievement of its industrial layout. In the future, with the continuous maturity and improvement of technology, China Energy Construction is expected to continue to expand in the field of energy storage, provide key technical support for more new energy projects, and promote the green transformation and sustainable development of China's energy structure.
