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

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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.

Hoy hablamos de la densidad energética de la batería y su impacto en la calidad de los vehículos eléctricos puros. Is the energy density? First of all, we simply understand the battery energy density is something. La densidad de energía se divide en dos, densidad de energía ponderal y densidad de energía volumétrica.

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). En términos simples, la densidad de energía es la evaluación de la capacidad de almacenamiento de energía de la batería. 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. Desde la perspectiva del marketing, dado que este es el estándar de desarrollo de políticas, ciertamente es atractivo para los consumidores, por lo que se ha convertido en un factor clave en el proceso de ventas de vehículos eléctricos puros. 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.

Lo hemos dicho antes, y la política requerirá densidad energética, y la energía es uno de los estándares de referencia en términos de nuevo apoyo energético. Cuanto mayor sea la densidad energética, mayores serán los nuevos subsidios energéticos. 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. Cómo aumentar la capacidad de la batería es una práctica consciente.

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. Sin embargo, la práctica de la conciencia no tiene nada bueno en manos de la persona enferma, para aumentar la capacidad de la batería, algunos fabricantes han reducido los requisitos de estabilidad de la batería y los riesgos de seguridad han aumentado.

Por lo tanto, hay información privilegiada de la industria, y en la capacidad de la batería es muy buena, afectaremos la seguridad de los vehículos eléctricos. 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. Por lo tanto, hay muchas maneras de añadir densidad energética.

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. Hablando claro, en general el precio del coche decide bien. 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.