Low-altitude flying cars, as a crucial direction for future transportation, place extremely high demands on the reliability, shock resistance, and lightweighting of core components. YMIN Electronics' liquid shock-resistant mounted aluminum electrolytic capacitors, with their breakthrough 10-30g shock resistance performance, provide key support for this field. We have provided a comprehensive explanation of the core issues of concern to the industry.

## 1. How is the shock resistance performance "10-30g" defined? What are the testing standards?

Here, "g" represents gravitational acceleration, a core unit for measuring vibration intensity. This parameter is based on sinusoidal vibration testing, accurately simulating the periodic vibration impacts encountered by capacitors during transportation and flight. The testing strictly adheres to the IEC 60068-2-6 International Electrotechnical Commission standard, ensuring that the product maintains mechanical robustness even in high-vibration environments, achieving a doubling of the traditional 5-10g shock resistance level.

## 2. What are the core performance advantages compared to ordinary capacitors and solid-state capacitors?

Compared to ordinary liquid surface-mount capacitors, this product achieves lower equivalent series resistance (ESR) and higher rated ripple current over a wide temperature range of -40°C to 125°C through optimized electrode foil and electrolyte formulation, enabling it to stably handle the high-current pulse demands of electronic control systems.

Compared to solid-state capacitors, its advantages are concentrated in two points: firstly, it offers better cost-effectiveness in high-temperature and high-voltage scenarios; secondly, it eliminates the DC bias characteristic issue, resulting in more stable capacitance changes with voltage, avoiding the impact of voltage fluctuations on system accuracy.

## 3. Is its performance stable in high-altitude and low-temperature environments? What is its operating temperature range?

The product's standard operating temperature range covers -40°C to 105°C, with some models exceeding 125°C, perfectly adapting to the complex temperature scenarios of low-altitude flying cars. For high-altitude, low-temperature environments, the R&D team specifically optimized the electrolyte formula. Even at -40°C, the ESR increase remains within a controllable range, ensuring system stability during cold starts and low-temperature operation.

## 4. What's special about the "mount-mount" structure? How does it improve vibration resistance?

The "mount-mount" design is the core structural design of this product. It refers to the capacitor core being securely fixed to a metal or resin base, with SMT mounting achieved through the base pads. Improved vibration resistance relies on a "three-in-one" design:

- A robust base distributes vibration stress from the PCB board to the entire base, reducing localized stress;

- Rigid fixation of the internal core prevents electrodes from shaking due to vibration;

- High-performance potting compound provides cushioning, further absorbing vibration energy and significantly reducing the impact of vibration on components.

## 5. What solutions address the challenges of automotive thermal management systems?

In water pump and oil pump drivers, capacitors face three major challenges simultaneously: large ripple current generated by high-frequency switching, high engine compartment temperatures, and engine vibration. YMIN's product, with its high ripple current capability, 125°C high-temperature rating, and 10-30g shock resistance, can operate stably in harsh environments, ensuring the accuracy and reliability of motor control and preventing thermal management system failures due to component failure.

## 6. How to avoid catastrophic failures in Electric Power Steering (EPS) systems?

As a safety-critical system, EPS is susceptible to system failure due to capacitor short circuits, open circuits, or other failures. YMIN enhances reliability through triple protection:

- Using high-purity raw materials and strict process control to reduce internal impurities;

- Innovative patch-type explosion-proof valve design with a built-in pressure release mechanism to reduce short-circuit risk;

- All products undergo 100% surge current and withstand voltage testing, eliminating early failures, while excellent shock resistance prevents internal fractures or short circuits caused by vibration.

## 7. What is the main role of capacitors in flight control systems?

In low-altitude aircraft flight control systems, this capacitor is primarily used in the power supply circuits of the flight control computer and servo motor drivers. Its core functions are threefold: first, voltage stabilization to ensure stable voltage output; second, filtering to remove noise signals from the power supply; and third, providing instantaneous pulse current to meet the rapid response requirements of the servos. Its stable performance directly determines the accuracy of sensor data and the response speed of the servos, serving as the "power guarantee" for the normal operation of the flight control system.

## 8. Was frequency optimization performed for complex airflow vibrations?

Yes. The vibration spectrum of aircraft caused by airflow changes is complex. The R&D team covered the vibration testing range from 10Hz to 2000Hz, focusing on optimizing the mid-to-high frequency range (50Hz-2000Hz) generated by core components such as motors and propellers. Through structural adjustments, the capacitor's resonant frequency avoids these critical frequency bands, maintaining stable performance even under complex vibration environments.

## 9. How was the lightweight design achieved? How was the weight and volume controlled?

Low-altitude aircraft are extremely sensitive to weight. YMIN balanced shock resistance with lightweight requirements in its design: on the one hand, it used high-capacitance electrode foil to significantly reduce the core package volume for the same capacity; on the other hand, it optimized the base and packaging material usage to reduce redundant structures. The final product achieves a shock resistance rating of 10-30g while maintaining a weight and volume comparable to conventional capacitors of the same specifications, fully meeting the lightweight requirements of aircraft.

## 10. Liquid Capacitor Lifespan Issues: What are the Solutions?

The lifespan bottleneck of liquid capacitors mainly stems from electrolyte drying. YMIN alleviates this problem through two core technologies: first, using a composite electrolyte with high flash voltage and low vapor pressure to reduce evaporation losses under high-temperature environments; second, using high-performance sealing rubber stoppers to significantly reduce electrolyte permeability. With these dual technologies, the product's lifespan is significantly extended under high-temperature environments, meeting the long-term usage requirements of low-altitude flying vehicles.
ARTICLE FROM : https://www.ymin.cn/news/how-lke-low-esr-aluminum-electrolytic-capacitors-solve-the-high-frequency-ripple-and-heat-loss-problems-in-electric-forklifts/