From：CTECHI GROUP Limited Release time：2018-09-30
Overview：Recently, the media began to report "electric vehicle battery life is only five years". The reason why the theory was brought back was because of an expert's speech at a recent international conference. Asad Farid of Berenberg Bank, Germany, said at a battery show last week that many electric vehicle batteries had a shorter life than consumers expected, with an average life of only five to six years. This remark has been reprinted by many media and has become a new argument for the failure to evoking electric cars. That is an interpreted views.
Recently, the media began to report "electric vehicle battery life is only five years".
Where does "five year theory" come from?
Several years ago, the battery life of electric vehicles was really limited, and the idea of a battery life of 3-5 years came up at that time.
But with the improvement of technology level, this view is not reliable any more.
The reason why the theory was brought back was because of an expert's speech at a recent international conference. Asad Farid of Berenberg Bank, Germany, said at a battery show last week that many electric vehicle batteries had a shorter life than consumers expected, with an average life of only five to six years. This remark has been reprinted by many media and has become a new argument for the failure to evoking electric cars. That is an interpreted views.
However, careful study will find that this expert's theory is not as simple as the media thought.
First of all, the object of discussion of the "five year theory" is limited to three yuan lithium battery. The reason for the decrease of charge and discharge times is the increase of nickel content in lithium-ion batteries due to blind stacking energy density.
Lithium iron phosphate batteries for sale, which are also common in electric vehicles, are not within the range of discussion.
Secondly, he emphasized another key factor is the impact of fast charging technology on battery life: after tripling the charging speed, the degradation rate of the battery will also increase with the increase in heat.
Finally, the use of air-cooled equipment will lead to faster degradation rate of the battery, which is twice as fast as the dynamic liquid-cooled battery.
In other words, the expert's original intention was that the blind use of air-cooled systems, blindly increasing energy density and over-charging led to the lifetime of lithium-ion batteries being reduced to 5-6 years.
Instead of the media's advocacy of "electric vehicle battery life itself is only five years."
Rechargeable LiFePO4 Battery Pack is longer and safer
It is worth noting that in the interview, he also praised the lithium iron phosphate battery.
The increase in nickel content will reduce the number of charges and discharges (life span) of NMC and NCA batteries to 2,000 and 1,000, respectively, he said.
But the rechargeable lifepo4 battery pack itself can achieve more than 3000 charges and discharges, in terms of life than the ternary lithium battery is much superior.
On the other hand, because of the difference in ignition point, 700 degrees will burn lithium iron phosphate materials, safety is also far higher than in 200 degrees will occur spontaneous combustion of lithium-ion battery materials.
Although the "electric vehicle battery can only be used for five years" is wrong.
But the expert's point of view does reflect some of the problems currently existing in the electric vehicle industry: blind overlap of continuity and the pursuit of rapid charging, has begun to affect the quality of the electric vehicle itself.
Being down-to-earth and seriously developing technology is the right way to develop electric vehicles.
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