EV Battery Warning Signs: When It Is Time for a Replacement

In today's convenient world of travel, electric vehicles have become an indispensable companion for daily commutes. The EV battery, as the core heart and power source of the vehicle, directly determines its operating performance. Generally speaking, batteries discharged deeply have a service life of about one year, while those discharged to 50-70% of capacity can last about one and a half years. However, when an EV battery has been used far beyond its normal range, users need to carefully judge based on actual usage conditions and vehicle operation whether the battery has reached the end of its life and whether it should be replaced with a new energy source.

When your EV battery shows the following conditions, it is sending you an urgent signal that it is time for a replacement.

First, when the actual discharge capacity of the battery has dropped to about 60% of its rated capacity, and even with careful maintenance the capacity cannot be significantly improved, the battery can be judged to have reached the end of its service life. During the use of an EV battery, when capacity decays to around 60%, all performance indicators deteriorate sharply, like a building about to collapse. The components basically fall into a state of degradation, and this performance decline gradually accelerates like an out-of-control train. Soon the battery completely loses its ability to charge and discharge and can no longer provide power for the EV.

Second, if you can clearly feel abnormal heat during the charging process, this is also a warning signal that should not be ignored. When an EV battery approaches the end of its life, its positive electrode shows serious softening, the main mode of battery failure, the active material inside sheds, and internal resistance keeps increasing. At the same time, impurity elements in the plates continue to dissolve. These changes greatly increase the gassing rate during charging, sharply reduce charging efficiency, and generate a large amount of heat. In this case, the battery self-discharges extremely fast; sometimes it is just fully charged but the power is gone shortly after. So, once this happens, to ensure normal use and safety of the EV, you should replace the battery in time.

Third, when an EV battery reaches the end of its life, its various performance indicators decline sharply and become extremely unstable, like a bomb that could explode at any moment. This instability may not only cause bad consequences such as heat and deformation during charging, but may also lead to serious problems such as short circuits or open circuits, and even the danger of explosion. Therefore, when you notice these dangerous signals, you must replace the battery without hesitation to ensure travel safety and the normal operation of the EV.

In fact, detecting problems with the EV battery in time and taking appropriate measures is itself the key secret to extending battery life. Just like carefully tending a plant, only by always paying attention to its growth and discovering and dealing with pests and diseases in time can it grow strong. During daily use, we should develop the good habit of regularly checking the battery's condition, so that we can take action as soon as problems begin to appear, safeguard battery health, and make our travel smoother and more worry-free. At the same time, correct charging methods and reasonable usage habits also have a crucial impact on battery life. Only by caring for the battery in an all-round way can it go farther and more steadily on the road of providing power for us.