Driving future mobility: Liquid SMD aluminum electrolytic capacitors play a key role in new energy vehicles

Leading capacitor technology drives future mobility

The field of new energy vehicle electronics is moving towards intelligence, automation, and integration. Capacitors, as core components, need to feature low impedance, low capacitance loss, good temperature stability, and long lifespan. These characteristics ensure that capacitors can work stably in the complex environments of new energy vehicles, such as high and low temperatures and vibrations, while enhancing energy efficiency and reliability.

PART.1  Application Solutions for Liquid SMD (Surface Mount Device) Aluminum Electrolytic Capacitors

The packaging form of liquid SMD (Surface Mount Device) aluminum electrolytic capacitors can replace traditional through-hole capacitors, perfectly adapting to automated production lines. This improves production efficiency and consistency, reduces human errors, and supports the realization of automated manufacturing. In addition, liquid SMD aluminum electrolytic capacitors excel in handling high ripple currents, low leakage currents, long lifespan, and outstanding low-temperature performance, meeting the stringent demands of new energy vehicle electronics systems for high performance and reliability, ensuring stable operation across various applications.

PART.2 Domain Controller · Solutions

With advancements in autonomous driving and intelligent technologies, domain controllers are taking on increasingly complex computing and control tasks within automotive electronic systems, requiring stronger processing capabilities and higher reliability. To meet these demands, domain controllers need highly integrated electronic components, with capacitors facing higher standards for stability and interference resistance.

• Low Impedance: Effectively filters noise and stray signals in circuits, preventing power ripples from causing control system failures. In high-frequency, high-speed working environments, capacitors maintain stable performance to ensure the reliable operation of the domain controller.
• High Ripple Current Endurance: In environments with frequent current fluctuations and load changes, capacitors withstand higher ripple currents, ensuring power system stability and preventing excessive currents from causing capacitor failure or damage. This enhances the overall stability and durability of the domain controller.

PART.3 Motor Drive Controller · Solutions

As the performance of electric vehicles continues to improve, the design of motor drive controllers is trending toward higher efficiency, compactness, and intelligence. Motor control systems demand greater efficiency, more precise control, and enhanced durability.

• High-Temperature Resistance: Features excellent temperature tolerance, with operating temperatures reaching up to 125°C, allowing adaptation to the high-temperature environments of motor drive controllers to ensure system stability and safety.
• Long Lifespan: Capable of stable operation under high loads, elevated temperatures, and extreme conditions over an extended period, prolonging the service life of motor drive controllers and reducing maintenance costs and downtime.
• Low Impedance: Enables efficient filtering and ripple current suppression, reducing electromagnetic interference (EMI), improving the electromagnetic compatibility of motor drive systems, and minimizing external disruptions to electronic control systems.

PART.4 BMS Battery Management System · Solutions

The Battery Management System (BMS) enables comprehensive management of battery status by monitoring key parameters such as voltage, current, temperature, and charge levels in real-time. The core functions of a BMS include not only extending battery lifespan and improving utilization but also ensuring safe battery operation.

• Strong Instantaneous Response Capability: During the operation of the battery management system, sudden changes in current load may cause transient current fluctuations or pulses. These fluctuations can interfere with sensitive components in the system or even damage circuits. As a filtering component, liquid SMD aluminum electrolytic capacitors can respond rapidly to such abrupt changes. Through their internal electric field energy storage and charge-release capabilities, they instantly absorb excess current, stabilizing current output effectively.

PART.6 Smart Car Lights · Solutions

Smart car lighting systems increasingly emphasize energy efficiency and high performance, with capacitors playing a crucial role in stabilizing voltage, filtering, and noise reduction within the lighting drive systems.

• High Capacitance Density: The compact size and high capacitance characteristics of liquid SMD aluminum electrolytic capacitors meet the dual demands of limited space and high efficiency in smart lighting systems. Their small form factor allows flexible installation in compact lighting drive modules while providing sufficient capacitance to support efficient operation.
• High-Temperature Resistance: Automotive lighting systems often face elevated operating temperatures. Liquid SMD aluminum electrolytic capacitors typically offer excellent temperature tolerance and long lifespan, enabling stable performance in high-temperature environments. This reduces maintenance costs and the need for frequent replacements due to premature failures in the lighting system.

PART.7 Electronic Rearview Mirrors · Solutions

With the advancement of intelligent technologies, electronic rearview mirrors are gradually replacing traditional ones, offering enhanced safety and convenience. Capacitors in electronic rearview mirrors serve functions such as filtering and voltage stabilization, requiring long lifespan, high stability, and strong anti-interference capabilities.

• Low Impedance: Reduces power noise and voltage fluctuations, ensuring image signal stability and improving the display quality of electronic rearview mirrors, particularly during dynamic video signal processing.
• High Capacitance: Electronic rearview mirrors often incorporate features like heating, night vision, and image enhancement, which demand significant current during operation. High-capacitance liquid SMD aluminum electrolytic capacitors meet the power needs of these high-power functions, ensuring stable power supply for reliable system performance.

PART.8 Smart Car Doors · Solutions

Consumers increasingly demand more intelligent features for smart car doors, requiring door control systems to respond quickly. Capacitors play a vital role in assisting relays to store electrical energy, ensuring stable relay operation.

• Energy Storage and Release: Provides instantaneous energy during relay activation, preventing delays or instability caused by insufficient voltage, ensuring quick response from the car door. During current surges or voltage fluctuations, liquid SMD aluminum electrolytic capacitors stabilize the power supply, mitigating voltage spikes’ impact on the relay and the overall system, ensuring accurate and timely door operation.

PART.9 Central Control Instrument Panel · Solutions

The trend toward intelligence and information integration has transformed the instrument panel from a simple display into the core information interaction interface of vehicle electronic systems. The central control instrument panel collects real-time data from multiple Electronic Control Units (ECUs) and sensor systems, presenting this information to the driver through advanced display technologies. Capacitors play a crucial role in filtering noise and providing stable power to ensure the instrument panel operates reliably under various conditions.

• High Ripple Current Endurance: The central control instrument panel requires a stable power supply to ensure the proper functioning of displays and sensors. Liquid SMD aluminum electrolytic capacitors offer excellent ripple current endurance, effectively absorbing and filtering high-frequency noise in the power supply, reducing interference with the instrument panel circuits, and enhancing system stability and reliability.
• Low-Temperature Resistance: Liquid SMD aluminum electrolytic capacitors exhibit minimal capacitance loss and excellent low-temperature startup performance, enabling the instrument panel to function reliably even in cold conditions, avoiding failures caused by low temperatures.

PART.10 Conclusion

YMIN liquid SMD aluminum electrolytic capacitors can replace traditional through-hole capacitors and adapt seamlessly to automated production lines. They meet the demands of new energy vehicles for power stability, anti-interference capabilities, and high reliability under various challenging conditions. These capacitors maintain exceptional performance, even in high-frequency, extreme temperature, and high-load environments, making them a critical component in the field of new energy vehicle electronics.

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