1. Advantages: High power output
main Question: How does the lithium-ion supercapacitor ensure DC bus voltage stability and prevent system downtime when the AI server GPU load experiences millisecond-level sudden changes or power grid fluctuations?
Related Question: The GPU load of an AI server may surge by 150% within milliseconds, and traditional lead-acid batteries cannot keep up. What is the specific response time of YMIN’s lithium-ion supercapacitor, and how does it achieve this rapid support?
Question Type: Technical
Answer: YMIN’s lithium-ion supercapacitor (SLF 4.0V 4500F) relies on physical energy storage principles, has extremely low internal resistance (≤0.8mΩ), and can achieve instantaneous high-rate discharge at the 1-50 millisecond level. When a sudden change in GPU load causes a sharp drop in DC bus voltage, it can release a large current almost instantly to directly compensate the bus for power loss. This buys time for the backend BBU power supply to wake up and take over, ensuring a smooth voltage transition and preventing computational errors or hardware crashes caused by voltage drops.
Related Question: In the hybrid architecture of “supercapacitor + BBU,” how do YMIN supercapacitors and BBUs work together to cope with power outages or fluctuations on different time scales from milliseconds to minutes?
Question Type: Technical
Answer: In this architecture, YMIN lithium-ion supercapacitor modules are connected in parallel to the server’s DC bus as a “nearby buffer layer,” specifically designed to handle instantaneous power surges on the millisecond to second scale (such as sudden changes in GPU load or instantaneous grid fluctuations). It performs the initial instantaneous compensation, stabilizing the bus voltage. Subsequently, the BBU backup power supply is woken up and takes over, providing continuous power support for several minutes, ensuring the system has enough time to save data or switch to the backup power supply. The front-end UPS/HVDC is responsible for uninterrupted power supply for a longer period. The three components work in a tiered manner, covering all-day power supply from instantaneous to continuous operation.
2. Advantages: Size and Weight Optimization
Main Question: To improve the computing power density of a single rack, the size and weight of the BBU backup power supply need to be reduced. How much space and weight can lithium-ion supercapacitors reduce compared to traditional solutions?
Related Question: Our high-power-density AI server racks have limited space, and traditional BBU battery packs are too large and heavy. How much improvement in space and weight can using YMIN square lithium-ion capacitor modules bring?
Question Type: Technical
Answer: According to actual test data, while providing the same power level of backup power capability, using YMIN square lithium-ion supercapacitor modules (such as modules built with SLF 4.0V 4500F) to replace traditional lead-acid or lithium battery packs can reduce the total volume of the BBU backup power unit by approximately 50% to 70% and the overall weight by approximately 50% to 60%. This directly frees up valuable rack space (U bays) and reduces rack load, allowing you to integrate more compute nodes or enhance heat dissipation within a limited space, effectively improving total cost of ownership (TCO) and infrastructure utilization.
Related Question: We are planning a new generation of AI server racks, aiming to maximize GPU density per rack. However, traditional BBU backup power supplies (using lead-acid or lithium batteries) are too bulky and heavy, limiting the number of servers that can fit in a single rack. Is there a backup power solution that can significantly reduce size and weight? To what extent can it be done?
Question Type: Procurement
Answer: Yes. Adopting a hybrid energy storage architecture based on lithium-ion supercapacitors can significantly optimize the size and weight of BBU backup power supplies. While providing the same backup power level, lithium-ion supercapacitor modules can reduce overall volume by approximately 50% to 70% and weight by approximately 50% to 60% compared to traditional lead-acid or lithium battery solutions. This means it saves significant rack space and reduces rack load, allowing you to deploy more servers or GPUs within a single rack during planning, directly improving single-rack computing power output and infrastructure utilization.
3. Advantages: Improved Charging Speed
Main Question: AI data centers require BBU systems to recharge rapidly after discharge to shorten the system’s vulnerability window. How much faster is the charging speed of lithium-ion supercapacitors compared to traditional batteries?
Related Question: After a brief mains power outage or load surge, we want the energy storage units in the BBU system to be fully charged as quickly as possible to prepare for the next event. How long does it take for YMIN lithium-ion supercapacitors to recharge?
Question Type: Technical
Answer: YMIN lithium-ion supercapacitors possess excellent power characteristics, with a charging speed more than 5 times faster than traditional lead-acid or lithium batteries. In typical AI server BBU application scenarios, after a compensation discharge, they can be quickly recharged to a usable state within approximately ten minutes. This significantly shortens the “energy recovery period” of the backup power system, reduces system risks caused by insufficient power in energy storage units during continuous emergencies, and improves the overall availability and resilience of the power supply system.
4. Advantages: Long Cycle Life
Main Question: AI data centers operate 24/7, resulting in high maintenance costs for backup power systems. How does the ultra-long cycle life of lithium-ion supercapacitors reduce the overall lifecycle maintenance costs?
Related Question: Our data center environment has high temperatures and frequent load fluctuations, while traditional BBU batteries have short lifespans. What is the expected lifespan of YMIN lithium-ion supercapacitors under harsh environments of high temperature and high-frequency charge/discharge?
Question Type: Technical
Answer: The lifespan of YMIN lithium-ion supercapacitors is based on their physicochemical properties, exhibiting excellent tolerance to high temperature and high-frequency charge/discharge conditions. Their cycle life can reach over 1 million cycles, and under typical AI data center application conditions, their design life exceeds 6 years. This means that during the typical server upgrade cycle, replacement of the backup power storage unit due to performance degradation is virtually unnecessary, making it particularly suitable as a transient buffer unit for the BBU in harsh environments with frequent charging and discharging in AI computing centers.
Related Question: From a total investment cost perspective, although the initial purchase cost of lithium-ion supercapacitors may be high, how can it be proven that they are more economical in the long run for AI server BBU applications?
Question Type: Procurement
Answer: From a total cost of ownership (TCO) analysis, the economic benefits are reflected in three aspects: First, an extremely long service life (over 6 years, 200 times that of traditional batteries), requiring almost no replacement throughout the server’s lifespan, saving on spare parts procurement costs; second, virtually maintenance-free operation, saving significant manual inspection and maintenance costs; and third, high reliability, reducing the risk of business interruption and losses due to backup power system failures. Although the initial investment is higher, when spread over a multi-year usage period and considering maintenance savings and risk mitigation, its overall economic efficiency is significantly better than traditional battery solutions.
5. Advantages: Domestic Replacement
Main Question: For the internationally branded lithium-ion supercapacitors used in high-end AI servers like the NVIDIA GB300, are there domestically produced alternatives with comparable or superior performance?
Related Question: We are deploying a server cluster whose reference design uses lithium-ion supercapacitors from Musashi, Japan. Considering supply chain security and cost optimization, which product would you recommend?
Question Type: Technical
Answer: We recommend the YMIN SLF 4.0V 4500F lithium-ion supercapacitor, a high-performance domestic product developed for the instantaneous buffering needs of high-end AI server BBUs. Compared to the Musashi CCP3300SC (3.8V 3000F) used in the GB300 reference design, YMIN’s product achieves benchmarking and improvement in core indicators: higher rated voltage (4.0V), larger nominal capacity (4500F), and significantly increased single-cell energy density. It maintains consistency in key reliability indicators such as internal resistance (both ≤0.8mΩ) and cycle life (both >10 years), which determine response speed. When applied in groups to 48V systems, its maximum continuous power (17kW) and discharge support capability (e.g., 18s@15kW) meet and slightly exceed the requirements of similar application scenarios, making it a reliable domestic replacement solution.
Related Question: We hope to replace key energy storage components in the backup power supply of the BBU for data center AI servers with domestically produced components, but we are concerned about performance and system compatibility. Is there a solution that can ensure seamless integration of the entire module with the existing “supercapacitor + BBU” hybrid architecture?
Question Type: Procurement
Answer: Yungming can provide complete square lithium-ion capacitor module-level solutions. Taking the SLF 4.0V 4500F product as an example, its module adopts a standard 19-inch rack design (e.g., 12S1P configuration), and its output voltage range (48-30V) is compatible with the DC bus voltage commonly found in AI servers. The module has low overall internal resistance (4.8mΩ) and clearly defined electrical interfaces, mechanical dimensions, and thermal management requirements. This means it can be directly connected in parallel to the server’s DC bus as a “nearby buffer layer,” forming a hybrid energy storage architecture with a third-party BBU, achieving seamless integration in mechanical installation, electrical connections, and control logic. We provide detailed technical interface documentation and support to ensure a smooth replacement process and overall system reliability.
6. Advantages: High-Temperature Reliability & Thermal Management Capabilities
main Question: AI server racks operate in a high-temperature environment of 45–55℃ year-round, with high-power GPUs causing frequent thermal shocks. Can lithium-ion supercapacitors operate stably for extended periods? Will performance degradation accelerate?
Related Question: Given that the internal temperature of AI server racks is generally 45~55℃, what is the performance degradation rate of YMIN lithium-ion supercapacitors? Is additional heat dissipation required?
Question Type: Technical
Answer: YMIN SLF square lithium-ion supercapacitors utilize high-temperature resistant electrode materials and a composite diaphragm system. Even at 55℃, they can maintain ≥85% capacity output, with an ESR temperature rise coefficient of less than 0.1%/℃, and continuous instantaneous discharge performance will not decrease. In the typical “front-to-back” airflow environment of AI server racks, it can operate stably for 6-8 years without additional cooling structures, making it a more suitable instantaneous power backup solution than batteries for high-heat-density data centers.
7. Advantages: System Compatibility & Electrical Safety
main Question: After a supercapacitor is connected in parallel with the 48V DC bus as an instantaneous buffer unit, will it cause reverse charging, current surges, or pose a risk to the existing BBU/power system?
Related Question: After a lithium-ion supercapacitor is connected in parallel with the bus, will it cause reverse charging, current backflow, or instantaneous system surges?
Question Type: Technical
Answer: YMIN supercapacitor modules have built-in pre-charging circuits + current limiting + voltage limiting + soft-start logic. When connected in parallel with the bus, it enters “pre-charging mode,” gradually increasing the voltage to avoid surges. It also includes internal reverse connection and backflow prevention circuits, so reverse charging will not occur. At the same time, the module has comprehensive OVP/OCP protection, is compatible with the existing power supply/BBU of the server, and will not bring electrical surge risks.
8. Advantages: Pulse Resistance & High-Frequency Impact Lifespan
main Question: Will high-frequency pulse loads from GPUs cause rapid aging of supercapacitors? Can the lifespan truly reach multiple years?
Related Question: In frequent “pulse discharge” scenarios (such as instantaneous GPU power boosts), will the lifespan of YMIN supercapacitors be affected?
Question Type: Technical
Answer: No. The SLF series is specifically designed for high-frequency impacts, with a single-cell cycle life > 1,000,000 cycles, suitable for high-rate discharges in the microsecond to millisecond range. Even under hundreds to thousands of load fluctuations per day in AI clusters, it can still achieve a design lifespan of > 6-8 years, far superior to the frequent lifespan degradation problem of traditional batteries.
9. Advantages: Reduced Total Cost of Ownership (TCO)
main Question: Can lithium-ion supercapacitors allow for a reduction in BBU specifications to lower the overall cost of the backup power system?
Related Question: With limited rack space, can the use of lithium-ion supercapacitors reduce the number of backup batteries and decrease the BBU capacity, thus lowering the overall TCO?
Question Type: Procurement
Answer: Yes. YMIN supercapacitors handle all “millisecond-level peak power” surges, eliminating the need for BBUs to be designed for high peak power, reducing capacity by 15-30% or allowing the use of lower-tier battery systems. With supercapacitors, the overall TCO of the backup power system decreases, including fewer batteries, fewer replacement parts, and lower maintenance costs.
10. Advantages: Enhanced UPS Switching Stability
Main Question: In cases where UPS switching time is unstable, or even extends from 8ms to 12ms, can supercapacitors compensate for power gaps?
Related Question: Some older UPS systems have long switching windows. If the UPS switching time is extended (e.g., 12ms or even 15ms), can YMIN supercapacitors provide additional voltage compensation?
Question Type: Technical
Answer: YMIN supercapacitors have a microsecond-level response time, completely covering the UPS switching window. When the UPS experiences a 12-15ms delay, it can automatically compensate for the entire voltage drop, ensuring bus stability and not affecting the normal operation of GPUs/SSDs.
11. Advantages: Enhanced Data Center Resilience
main Question： AI servers frequently encounter multiple risks such as sudden increases in GPU load, power grid fluctuations, and UPS power outages. Is there a single device that can improve overall resilience?
Related Question: Operations and maintenance personnel want to add a “safety buffer layer.” How can YMIN supercapacitors improve the “power resilience” of the entire AI server data center? Can multiple buffering be achieved?
Question Type: Technical
Answer: YMIN supercapacitors can act as an “instantaneous power buffer layer,” automatically absorbing and compensating for millisecond-level voltage fluctuations, significantly improving bus stability and reducing the number of high-frequency impacts on the BBU and UPS, thus improving the “power resilience” of the entire power supply chain from a system perspective. This is a role that batteries cannot play, making it particularly suitable for high-computing AI scenarios.
Post time: Feb-25-2026