The core function of the buck-boost charging management IC is to dynamically adjust the charging current, supporting both Boost and Buck modes to adapt to changes in battery voltage. The current products have been widely applied in portable power supplies, Internet of Things devices, consumer electronics and other fields. Moreover, as energy storage systems evolve towards high voltage and high frequency, higher requirements have been put forward for the efficiency and high-temperature resistance of ics.
    Under the trend of intelligent energy storage systems, voltage-up and step-down charging management ics are beginning to integrate with AI technology, such as optimizing charging strategies through AI, enhancing system safety and stability. This trend will further deepen in 2025.
    With the vigorous development of renewable energy sources such as solar and wind energy, energy storage technology has become an important means to effectively store these intermittent energy sources and meet the continuous and constantly changing energy demands. The demand for high-performance power management chips in the energy storage market continues to grow.
    The major players in the global market include international giants such as TI, ADI, and Renesas, which have occupied the high-end market by virtue of their technological accumulation. Chinese manufacturers such as Nanxin Semiconductor and Jiawate Microelectronics have gradually gained a foothold in niche markets (such as power tools and portable power supplies) through their cost-performance advantages and technological innovation. For instance, the products of Nanxin Semiconductor have covered the fields of consumer electronics and energy storage system integration.

The current development status of buck-boost charging ics
    At present, the buck-boost charging ics in the market feature a wide voltage range, high-precision control, high conversion efficiency, and high integration. Take Nanxin Technology's SC8808 as an example. It supports a wide input voltage range of 4.5V to 80V and a regulated output of 5V to 48V. Moreover, when the temperature is between 0 and 85℃, the charging current accuracy at the battery end can reach up to ±3%, and the charging voltage accuracy can reach up to ±0.5%.
    In terms of conversion efficiency, it has been possible to achieve an efficiency of over 98%. It also integrates multiple functions and algorithms. For instance, this chip integrates voltage rise and fall control and MPPT algorithm, and is equipped with an 11-bit high-precision ADC for voltage, current and NTC thermistor detection.
    This is also the mainstream direction of current buck-boost charging ics. In the future, buck-boost charging ics will integrate more functions, such as battery protection, power monitoring, communication interfaces, etc. Realizing multi-functional integration can reduce the number of external components, lower system costs and volume, and enhance the reliability and integration of the system. It includes integrating functions such as overcharge protection, overdischarge protection, and overcurrent protection within the chip to provide comprehensive protection for the battery.
In addition, for instance, InChip's IP5389 supports bidirectional charging and discharging as well as multi-interface protocols (such as USB-C, Lightning, etc.), and is applied in portable energy storage power supplies and outdoor equipment. Zhongying Electronics' SH367309 supports ‌5-16 string battery management ‌, integrates overcharge/overdischarge protection and balancing functions, and is suitable for grid-level energy storage requirements.
    Functionally speaking, the bidirectional buck-boost function has now become mainstream, enabling the chip to perform both charging and discharging operations. It usually also has all-round protection functions, including input
Voltage protection, battery overvoltage, input overcurrent, peak current protection and over-temperature protection, etc.
    In the future, intelligent management functions will also be introduced, such as adaptive charging algorithms and battery health status monitoring. By monitoring the battery status and environmental conditions in real time, charging parameters are automatically adjusted to achieve personalized charging strategies, thereby enhancing the battery's service life and performance. At the same time, it is equipped with fault diagnosis and early warning functions, which can promptly identify and handle potential problems to ensure the safe operation of the system.
     With the continuous development of battery technology and the emergence of new types of batteries such as solid-state batteries and lithium-sulfur batteries, voltage-boosting charging ics need to be able to adapt to the charging characteristics and requirements of these new types of batteries. Develop charging algorithms and control strategies specifically for new types of batteries to ensure their safe and efficient charging.

Summary
    At present, the buck-boost charging ics in the energy storage market are showing trends such as wide voltage range, high-precision control, high conversion efficiency, and high integration. The market demand is continuously growing, application scenarios are constantly expanding, and industry competition is becoming increasingly fierce. In the future, as the demand for photovoltaic energy storage and portable devices grows, the ‌ energy efficiency improvement and cost optimization ‌ of buck-boost ics will become the core of competition.