Biaodi Solves the Three-Level Protection Dilemma of Energy Storage Systems, Launches Intelligent Fuses to Fortify Safety Barriers

On December 31, 2025, Biaodi Electronics officially released the PFC-1500V series active-passive integrated intelligent fuses, successfully overcoming the global challenge of three-level protection for energy storage systems and providing critical support for the safe development of the new energy industry.

Industry Pain Points: Inverted Traditional Protection Logic and Skyrocketing O&M Costs

With the rising proportion of installed energy storage capacity, its reliability has become a key factor for the safe and stable operation of power grids. However, the industry has long been plagued by the protection issue of overstep tripping. An ideal three-level protection system for energy storage systems (PACK level, cluster level, combiner box/PCS level) requires the upper-level (combiner) fuse to act prior to the lower-level (high-voltage box) fuse in the event of a fault, achieving precise isolation.

Restricted by the "narrow neck" structure, traditional fuses suffer from disordered protection action sequence: the combiner fuse with higher current-carrying capacity features a larger total cross-sectional area of the "narrow neck", resulting in slower fusing speed. This causes the DC side and combiner box fuses to "fail to act when required", while the fuses in the downstream high-voltage box "act unnecessarily when not required" in case of PCS short-circuit faults.

This problem exacerbates fault maintenance from "only replacing one combiner fuse" to "dismantling and replacing the combiner box and all 12 high-voltage box fuses", leading to an unnecessary expansion of fault scope and a sharp surge in O&M costs and difficulties.

Solution: Generational Leap with Intelligent Fuses for Precise Protection

Addressing the industry predicament of excessive I²t value of traditional fuses that hinders selective coordination, Biaodi Electronics has pioneered the global launch of the PFC-1500V series active-passive integrated intelligent fuses (available in 2000A and 3000A specifications), reshaping the protection logic of energy storage systems with disruptive technology. The product boasts prominent core advantages:

• Order-of-magnitude improvement in breaking capacity: The joule integral (I²t) of the intelligent fuse is less than 2% of that of traditional fuses. Equipped with fast breaking and low let-through energy characteristics, it delivers exceptional protection for downstream equipment.
• Resolution of core contradictions: It completely breaks the industry bottleneck where "low temperature rise" and "fast breaking" cannot be achieved simultaneously in the fuse field.
• Flexible adaptability: It supports open and flexible configuration of protection parameters, accurately meeting the personalized protection needs of different application scenarios.

The intelligent fuse launched by Biaodi not only overcomes the industry-wide challenge of three-level coordinated protection for energy storage systems but also fortifies the last critical intelligent safety barrier for such systems. With innovative technologies, we jointly lay a solid foundation for the safety of new energy systems and drive the energy storage industry towards a safer, more efficient and greener future.