On the morning of June 10, 2023, on the second day of Guangya Exhibition, Dr. Qiu Yang, co-founder and chief product officer of Boland, was invited to share his battery pack-level active management technology at the "Frontier Technology Trend Forum for Residential Energy Storage under the Dual Carbon Strategy". In response to the current pain points of centralized and string energy storage system architectures, Powerland's new BCU solution implements refined management of the battery pack level to achieve more efficient charging and discharging, reduce the basic distribution and storage of energy storage systems, and achieve better investment.
The low battery utilization rate and capacity mismatch of the energy storage system in the life cycle of the traditional centralized energy storage system are the main pain points at present.
Boland's new BCU architecture can realize the refinement of the battery pack level, so as to achieve "one package and one management".
Through the battery pack-level controller, the series mismatch between battery modules due to internal resistance differences and other reasons is eliminated.
Pack-level fault bypass function, hierarchical protection. In the extreme case of battery pack damage, intelligent bypass is implemented to improve the safety of the system. At the same time, other BCUs in the same cluster will work together to boost the voltage to compensate for the bypassed battery pack voltage, so as to realize the adaptive adjustment and stabilization of the bus voltage of the entire battery cluster.
It supports the mixing of new and old batteries, improves the charging and discharging capacity and life of the battery, and improves the performance of the whole life cycle. With the intelligent capacity reorganization and pack replacement strategy, the system life is infinitely close to the cycle life of the battery cell without replacing the battery cell.
The BCU controller products with Boland's patented technology have ultra-small size, ultra-high efficiency, and power density up to 747W inch.
Thanks to the continuous innovation ability of Boland, as well as many years of industry experience in the power electronics industry, Boland BCU controller adopts advanced high-frequency power electronic switching circuit technology, which greatly reduces the volume of passive components by increasing the switching frequency, and at the same time reduces the influence of parasitic parameters caused by high-frequency switching through optimized design, and carries out fast feedback and flexible multi-scene control and protection functions through high-speed digital control chips. The phase-shifting control is used to greatly reduce the ripple and reduce the stress requirements of the device.
The high-frequency design allows the use of PCB winding technology to compress the traditional large-size transformer into a small-volume planar transformer, and the magnetic integration technology of the inductor can be applied at the same time to further reduce the number and volume of magnetic components. In order to achieve ultra-high power density power supply design, it is also necessary to make full use of all the space inside the power supply, so the power supply and the design of the 3D structure complement each other at the beginning of the design, and fully consider the requirements of its heat dissipation mode, manufacturability and reliability, so as to realize the design of high power density module structure.
At the end of his speech, Dr. Qiu Yang mentioned that Powerland has always adhered to technological innovation over the years, and is committed to using original technology to help achieve the "double carbon" goal and make the world cleaner.