What is the reason for the supercapacitor failure in the Hongqi H5?
3 Answers
Hongqi H5 supercapacitor failure may be due to a circuit malfunction. If the Hongqi H5 is not used for a long time, the battery may experience power loss. In this case, you need to use jumper cables with a new battery or connect the jumper cables to another vehicle for charging. Here is an introduction to the Hongqi H5: 1. Exterior: The Hongqi H5 has a very grand appearance, and at the same time, this car has a strong sense of sportiness. The fastback design results in an ultra-low drag coefficient. Hongqi brand cars deeply integrate China's excellent traditional culture with the world's advanced culture and modern fashion design to create outstanding products. 2. Disadvantages: One disadvantage of the Hongqi H5 is its relatively high fuel consumption, especially during summer and winter when the air conditioning is used, where fuel consumption can easily exceed 10 liters per 100 kilometers.
The supercapacitor used in the Hongqi H5 primarily stores electricity in the hybrid system, with several common causes of failure. Capacitor aging is the most prevalent issue, as these components have a limited number of charge-discharge cycles—frequent start-stop operations can significantly shorten their lifespan. Problems with wiring harnesses are also common, such as loose or corroded connectors. I've seen many cases where water seepage during car washing caused short circuits in the connectors. Temperature has a significant impact: high engine compartment temperatures in summer accelerate capacitor aging, while extreme cold in northern regions reduces performance. A faulty voltage management chip can also trigger false alarms, requiring professional diagnostic equipment to verify. Lastly, the body control module software should be checked, as system crashes may also report false errors, necessitating software updates. Regular battery system inspections are recommended—don’t wait for the warning light to appear before addressing issues.
I specialize in automotive electrical circuit repairs and have worked on numerous Hongqi H5 supercapacitor issues. The most common problem is the degradation of individual capacitor cells, especially in vehicles over three years old, where the energy storage capacity declines rapidly. Voltage imbalance is also a frequent issue, as an abnormal charge or discharge in a single cell can drag down the entire module. Cable wear leading to short circuits is particularly dangerous, especially in areas with high engine compartment vibration where insulation can easily wear through. Oxidation and poor contact in connectors are often overlooked, though they can be temporarily fixed by unplugging and reconnecting a few times. Additionally, watch out for stuck cooling fans, as supercapacitors tend to fail when operating temperatures exceed 70°C. Unauthorized circuit modifications with improper wiring can cause overvoltage, as the factory design has limited tolerance. If the dashboard shows a hybrid system fault, it's time to check the supercapacitor status.
