Can the energy density of the power lithium-ion battery really determine the quality of electric cars?

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Umhlinzeki Wesiteshi Samandla Esiphathekayo

A friend considers buying an electric car (no way, persuading it is not listening), in the process of accompanying the car, the author found that the salesperson began to use the energy density of the battery as an advocacy. "This car energy density is as high as XXX", "battery brand is XXX" speech, usually speak from the sales consultant of the electric car. When I asked, when I was energy density, the sales consultant did a few seconds, and said: "Simply, the energy density is higher, the better the car, the country has more subsidies!" It is very clear, energy Density this, even some car sales consultants are not too clear.

In fact, some new products and new technologies are promoted, and there is almost in all industries. But what these new stations use to do? How much value is there? After the consumers are wrapped around the cloud, it seems that it is not very concerned about these problems. I only feel that this thing is really a cow.

Täna räägime aku energiatihedusest, sellest, kui palju mõjutab puhaste elektrisõidukite kvaliteeti. Is the energy density? First of all, we simply understand the battery energy density is something. Energiatihedus jaguneb kaheks: kaalu energiatihedus ja mahuenergia tihedus.

The current reference is the weight energy density, which calculates the formula: weight energy density = battery capacity ¡Á discharge platform / weight, unit is WH / kg (Watt / Kik); and the volume of energy density calculation is required to change the "weight" of the above formula to "volume", the unit is WH / L (watt / liter). Lihtsamalt öeldes on energiatihedus aku energiasalvestusvõime hindamine. And such evaluation, it was not to determine the standard of good or bad electric vehicles, but the policy requirements for the company's power lithium-ion battery power storage capacity.

According to the requirements, the company needs more than 300 watts / kg in the 2020 lithium-ion battery monomer, and the system is more than 260 watts / kg. Turunduse vaatenurgast, kuna see on poliitika väljatöötamise standard, on see tarbijate jaoks kindlasti atraktiivne, mistõttu on sellest saanud puhaste elektrisõidukite müügiprotsessis hüppaja. The evaluation of energy density is not fully mature, and the evaluation of energy density is not absolute fair, because this and car companies are straight.

Oleme varem öelnud, et poliitika nõuab energiatihedust ning energia on uue energiatoetuse üks võrdlusstandardeid. Mida suurem on energiatihedus, seda rohkem uusi energiatoetusi. This has led to a "arms race" in the power lithium-ion battery, and there are still many cats.

To understand how the car enterprise improves energy density, it has to say from the formula just now: weight energy density = battery capacity ¡Á discharge platform / weight. To increase this formula, the final value is two, one is to increase the battery capacity, and the other is to reduce the weight of the battery. Aku mahtuvuse suurendamine on südametunnistuse praktika.

There are many kinds of large-scale capacity, and the most is from the battery material. At present, the three-dimensional lithium-ion battery is the highest power lithium-ion battery type in China, while the phosphate iron battery is very fast. Südametunnistuse harjutamisel pole aga haige inimese käes midagi head, aku mahtuvuse suurendamiseks on mõned tootjad aku stabiilsuse nõudeid alandanud ning ohutusohud on suurenenud.

Seetõttu on tööstusharu siseringi ja aku mahutavus on väga hea, mõjutame elektrisõidukite ohutust. Another way is to mitigate the overall weight of the entire dynamic lithium-ion battery, which is actually not cured. Some high-quality power lithium-ion batteries have a separate cell in each battery pack to fail to fail to affect the entire battery pack.

To reduce the weight of the dynamic lithium-ion battery, it is the first to rush to these cells. Either develop a new material allows it to reduce weight without affecting the protection of the battery, or a material that is straight down on the material or lighter but poor intensity. Seetõttu on energiatiheduse lisamiseks palju võimalusi.

Relevant car companies, cutting materials is a "win-win" approach, and security issues are of course 60 tons. In the case where there is no uniform requirement for the structure and material of the battery, the safety and quality of high energy density is in qualifying, good or excellent level, and consumers are unparalleled. Write in the last actual, the simplest and rude approach, or the total capacity of the battery.

If you want to consider the factors of battery safety, the quality of the vehicle, the electric car is still a penny, which is still a penny. Kui rääkida otse, siis üldiselt või auto hind otsustab hea. If the relevant part can improve the fairness of the electric vehicle assessment standards, it is very positive for the progress of stimulating technology and the protection of consumer right.