Mileage anxiety is the biggest problem faced by many friends who drive electric cars, once a car owner described driving an electric car out, like going out to get a cell phone without a rechargeable battery as insecure. In addition, there are many friends shopping for electric cars worry about the quality of the battery, will not be used like a cell phone will not work after a year. Therefore, many new energy car companies have a separate warranty on the battery, but it is still very different between the various car companies.
Last week, Rongwei ERX5 officially entered the Beijing area small catalog and accept orders for sales, its proposed battery decay warranty service has attracted the attention of consumers. And before that, BYD will be in the car warranty based on the lifetime warranty of the electric core. So on the issue of battery warranty, which is more meaningful, BYD's lifetime warranty on battery cells or SAIC New Energy's warranty on battery degradation?
The battery is destined to decay
"Battery degradation in electric vehicles is inevitable. The decay characteristics of the battery are decided when the battery leaves the factory and can hardly be changed. What the battery management system and the vehicle's electric control can do is to avoid overcharging and overdischarging the battery as much as possible so that the battery can avoid harm and reach the end of life." An expert on the battery, who did not want to be named, said.
Since the battery decay is inevitable, then the electric car manufacturers are how to deal with this problem?
It is understood that the mainstream of new energy car companies only for the vehicle warranty, only individual large manufacturers to the battery for additional warranty. For example, the above-mentioned, BYD proposed a lifetime warranty on the battery cell, Rongwei battery decay warranty, in addition, BAIC New Energy also proposed, before April this year to buy the new EX260/EU260 users can enjoy a lifetime warranty on the battery cell service. So, whether the battery lifetime warranty or decay warranty, does it guarantee that consumers can replace the battery for life when driving the vehicle normally?
The battery is non-linearly decaying
To be able to understand the battery lifetime warranty proposed by BYD, I visited a BYD new energy 4S store. The technician in the store after-sales explained the warranty service provided by BYD. "General pure electric car in the first year of decay is relatively large, at about 8%, but in the following 2-3 years will be decayed 4%, to 5-6 years will be decayed 1% year by year, this amount of decay is a normal phenomenon, if you encounter a sudden battery decay, range suddenly reduced, is not a normal phenomenon, will be free to replace the battery pack." The technician said, "At present, BYD sold models have not exceeded the 8-year 150,000-kilometer vehicle warranty period, so there is no precedent for battery cell replacement."
At the same time, the technician also said, "At present, the normal range of BYD battery decay is mainly determined by the manufacturer, we form a report after testing the battery in the store, and then handed to the manufacturer, the manufacturer to decide whether the car belongs to the normal decay, if the decay of the battery within the normal range, do not provide free replacement battery pack service." In other words, BYD does not provide a clear range of attenuation, normal or not have the manufacturer to decide. I also contacted BYD, the other party said, "As the current attenuation how much range value belongs to the warranty range, the state also does not have a clear indicator, and ultimately consistent with national policy."
"Battery attenuation is non-linear and has a relationship with the BMS design, the whole vehicle electric control, so each battery factory will provide a battery attenuation curve." The above battery experts said. It can be seen that the above BYD 4S store after-sales technician said that "the longer the driving years, the smaller the decay" contradictory statement.
Is it feasible to replace the battery cell?
Not only BYD proposed a lifetime warranty on the battery cells, BAIC New Energy also proposed this service for some models and consumers. So with the battery cell warranty is it feasible?
It is understood that the battery cells are not only difficult to replace, the danger index is also quite high, the need for professionals to disassemble the battery, detect dissimilar cells and replace, its difficulty is several times the combination of battery. This statement is also recognized by the above-mentioned technician, he said, "Considering the difficulty and professionalism of the battery cell replacement, the future manufacturers may be based on the needs of the city, centralized an after-sales service center for the replacement of the battery cell."
Above, the lifetime warranty of the battery cell or doubtful, but also to be tested by the market. So will the battery decay warranty proposed by Rongwei be more feasible and convincing?
As the above battery experts say, battery manufacturers are different, different types of battery attenuation differences are also different, and battery management system and electronic control system is also a factor affecting the battery attenuation, can not be given for a model of a clear amount of attenuation. But Rongwei first proposed battery decay warranty, and 5 years / 100,000 km less than 20% of the decay amount has not lost to the mainstream models. And according to the BYD after-sales technician's algorithm, after 5 years, the BYD electric model battery decay amount is about 21%, and belongs to the normal decay amount, and Rongwei will provide decay warranty service for the vehicle.
The battery decay directly affects the range, and consumers with mileage anxiety are more concerned about the amount of battery decay. Rongwei first proposed battery decay warranty or can provide new ideas, and BYD, BAIC New Energy can also give a lifetime warranty for the battery cell decay range, improve the service standards to facilitate consumer comparisons, but also to protect the rights and interests of consumers.
