According to the automaker, the issue is related to the 12V battery and its charging cable, which can rub against the steering column, and potentially result in a short-circuit if the insulation becomes worn. If left unaddressed, it can also present a fire risk. The company states that the problem was caused by the bend in the cable not being located correctly during production, potentially allowing it to contact the column shaft.
The automaker says that no risk of electrocution is associated with this issue, only the non-traction systems that are powered by the 12V battery may be affected. However, owners of rear-wheel-drive versions of the ID.4 should look out for warning messages regarding the 12V battery, which can indicate that the problem has already progressed to the point where the insulation is damaged and a short is occurring.
The automaker is expected to notify owners of the campaign by the end of February, and the company's service centers will replace the charging cable for free.
Why do fully electric vehicles use 12V battery?
Battery-electric vehicles (EVs) still use 12V batteries for a few reasons:
- Accessory power: The 12V battery is used to power the vehicle's accessories, such as the lights, radio, and windshield wipers. This allows these systems to continue to function even when the main high-voltage battery is turned off or is being charged.
- Safety systems: The 12V battery is used to power the vehicle's safety systems, such as the airbags and seatbelt pretensioners. In the event of a crash, these systems need to be operational in order to protect the occupants of the vehicle.
- Onboard computer systems: The 12V battery is used to power the vehicle's onboard computer systems, such as the Engine Control Unit (ECU) and the Vehicle Control Unit (VCU). These systems are responsible for controlling various aspects of the vehicle, such as the powertrain and the charging system, and they need to be operational at all times.
- Emergency shut down: It is a safety feature that if the vehicle detects any type of fault, the 12V battery will shut down the high voltage battery avoiding any type of accident
- Comfort and Convenience: The 12V battery is also used to supply power to the vehicle’s comfort and convenience features, such as power windows, door locks, mirrors and seat heaters, ensuring that these features can be used even when the main high-voltage battery is turned off or is being charged.
Overall, the 12V battery in an EV serves many of the same functions as the 12V battery in a traditional internal combustion engine (ICE) vehicle, and it is an important component that helps to ensure the safety, reliability, and functionality of the vehicle.
Source: Autoblog
