Xiaomi SU7 Battery Shrinking Battery Life, Should I choose original or sub-factory parts when repairing? When the Xiaomi SU7 battery has a shrinking battery life and needs replacement parts, it is recommended to give priority to the original battery, because the sub-factory battery, although the price is low, but there are technical risks and safety hazards, which need to be carefully weighed.
The battery management system of Xiaomi SU7 is closely related to the characteristics of the battery cell, and the voltage and current parameters and thermal management protocols of the original battery have been rigorously calibrated to ensure a seamless match with the vehicle’s charging logic and energy recovery strategy. If a sub-factory battery is used, parameter deviations may cause the battery management system to misjudge, triggering a decline in charging efficiency and accelerating aging.
The Xiaomi SU7’s battery pack adopts a multi-layer protection design, with safety mechanisms that need to work in tandem with specific cell materials and encapsulation processes. Sub-factory batteries that do not pass the same safety certification may run the risk of thermal runaway under extreme working conditions, while original batteries undergo rigorous testing of pinprick, extrusion, and fire, which can minimise potential safety hazards.
In order to reduce costs, sub-factory batteries may use lower energy density or recycled batteries, resulting in faster capacity degradation. Some owners have reported that the range of the sub-factory batteries shrinks more than that of the OEM batteries after use, and the subsequent maintenance costs may offset the initial price advantage. Although the original battery has a higher unit price, and the health of the battery after replacement is close to that of a new car, it can maintain a more stable range performance.
Xiaomi SU7 battery life shrinkage, repair should choose original or secondary parts? If you insist on choosing a sub-factory battery, you need to focus on verifying the supplier’s qualifications, confirming that the battery number can be traced back to the official database, and requesting dynamic anti-counterfeiting markings and weight error ranges, so as to avoid losing the vehicle’s original warranty qualification as a result of replacement by unofficial channels.
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