First of all, the second generation of BYD Tang used ternary lithium batteries, rather than lithium iron phosphate power batteries in many people. Tang DM has a 23.97kW ·h ternary lithium battery, compared to the theoretical cycle life of lithium iron phosphate 2000 times, the cycle life of ternary lithium batteries is shortened, with the advancement of technology, the theoretical charge and discharge cycle life of ternary lithium has increased from the previous 500 times to about 800 times, but due to the consistency of the battery cell in the combination into a battery pack, the cycle life promised by mainstream manufacturers is about 500 times.
BYD claims that under normal use, the battery life on the second generation of Tang DM is 6 years.
BYD Tang battery lifetime warranty?
Many people say that BYD's battery is not afraid of breaking, there is a lifetime warranty, is this really the case?
In the maintenance manual of the 2018 Tang DM, the warranty policy of the car is clarified, the warranty of the whole vehicle is 6 years or 150,000 kilometers, the warranty of the three electric system is 8 years or 150,000 kilometers, and the battery cell can enjoy the lifetime warranty policy. However, it should be noted that this refers to the battery cell enjoying a lifetime warranty, and the word gap is thousands of miles.
If during the 8-year warranty period, the battery is charged with less than the specified degree, that is, the battery capacity is less than 70% of the design capacity, the battery can be replaced free of charge, and within 8 years and the battery capacity is less than 70%, these two conditions are indispensable. If it is more than 8 years / 150,000 kilometers, you need to pay to apply to the 4S store for a battery replacement.
So how to understand the battery life warranty?
We all know that the battery is composed of batteries, BYD's batteries are connected in series and parallel to form the cells into an overall battery pack, and the capacity decay of the battery is often caused by the most attenuated cells, just like the barrel principle. BYD officially promised to replace the battery cells inside the battery pack for free in case of non-human damage, but the owner needs to bear the man-hours and freight costs of changing the battery cells to build the car. However, it should be noted that replacing some of these batteries must not be like changing the battery, so that the battery can be restored to the best state when it was shipped.
So in summary, BYD's battery warranty policy is still relatively conscientious, normal use of cars, BYD Tang's battery normal replacement cycle is 6-8 years, if the battery exceeds the shelf life, you can replace the battery cell to maintain a certain battery capacity.