Bangkok: Electric vehicle repair experts have highlighted three potential causes that could have led to a plug-in hybrid electric vehicle (PHEV) catching fire. They emphasize the necessity for a thorough investigation by officials to determine the exact cause.
According to Thai News Agency, the incident involved a PHEV that was completely burned down, with the vehicle not being plugged in at the time of the fire. Mr. Manas Phlatcharoen, an expert in electric car repairs, shared insights based on the images of the incident. He noted the difficulty in pinpointing the exact origin of the first spark but identified three possible areas of concern. The first potential cause is the 12-volt battery, which in this specific model is located in the rear storage area instead of the usual position at the front. A loose connection at the battery terminals could generate heat, leading to sparks and potentially igniting a fire.
The second potential cause involves the large battery, which is positioned under the car. This battery is similar in size to those found in standard electric vehicles, ranging from 30 to 34 kilowatts. If this battery is damaged, such as by an impact from the car hitting a pothole, it could cause a short circuit. Although immediate damage might not be visible, a dent could lead to a short circuit over time.
Lastly, the fuel tank, although unlikely to ignite on its own, could be a contributing factor if a short circuit occurs in the wiring or if either battery is damaged. Another possibility is interference by rodents, which might chew through wiring, causing a short circuit.
Historically, fires in electric vehicles have been more common during charging due to the active flow of electricity. However, instances of parked cars catching fire are rare. Mr. Phlatcharoen suggests that the cause is likely related to the car's equipment, possibly involving the large battery, and recommends a detailed inspection by an expert.
Despite these risks, PHEVs are equipped with systems designed to warn drivers of leaks or faults and typically have high safety measures to cut off power during such events. However, this incident may have occurred when the vehicle was unattended, possibly at night.
For PHEV users, particularly those traveling long distances or encountering rough terrain, it is advisable to inspect their vehicles for any damage immediately after potential impacts to prevent such incidents.