What is the issue with the DC-DC failure in new energy vehicles?
4 Answers
The issue with the DC-DC failure in new energy vehicles. No output from the DC-DC controller: Troubleshooting methods: No high-voltage (DC72V-DC86V) input or no 12V start signal voltage input, as well as a fault in the DC-DC converter itself, can all cause the DC-DC controller to have no output voltage. Measure whether there is high-voltage input at the DC-DC input terminal. If there is no 12V start signal voltage input, it indicates a fault in the main circuit, and further inspection of the continuity of the line between the main signal connector terminal and the constant power battery positive terminal is required. Low output voltage from the DC-DC. Troubleshooting methods: If the DC-DC controller itself is faulty, replace it with a new one. The steps for troubleshooting abnormal DC-DC operation are as follows: first, measure whether there is voltage input; second, measure whether there is a 12V signal voltage input; and third, measure whether there is voltage output.
I've been driving a new energy vehicle for several years. Once, I encountered a DC-DC converter failure where the dashboard and lights suddenly dimmed, and my phone couldn't charge either. The mechanic told me that the DC-DC converter is the component that steps down the high voltage from the battery to low voltage, and common failures are caused by overheating or aging. That repair cost me 800 yuan and delayed my trip. Since then, I've learned to regularly check the cooling system and wiring to avoid similar issues. The low-voltage system of new energy vehicles entirely depends on it; if it fails, the navigation and audio system may also stop working, affecting driving safety. I suggest fellow drivers go to a professional shop for early diagnosis and not wait until major problems arise.
As someone with a bit of interest in automotive electronics, I've researched DC-DC converters. Simply put, it converts the high voltage from the main battery to low voltage for in-car electronics. If it malfunctions, it could be due to internal circuit short circuits, overheating, or software errors. Symptoms include flickering lights or unresponsive charging ports. When I encountered this issue myself, I found that the fan was clogged with dust, and cleaning it fixed the problem. This component is crucial in new energy vehicles because it ensures all small devices function properly. Preventive measures include keeping the vehicle clean and well-ventilated. If problems arise, avoid tampering and seek a technician for repairs.
When driving my family around, I'm concerned about DC-DC converter failures. It can cut off low-voltage power supply, causing headlights and air conditioning to fail, which is especially dangerous when driving at night. From my experience, it's best to pull over and check as soon as possible—don't take risks by continuing to drive. The cause could be loose components or moisture corrosion. While repairs aren't difficult, delaying them leads to higher costs. A reminder to everyone: regular maintenance can help reduce these risks.
