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

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Soláthraí Stáisiún Cumhachta Inaistrithe

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.

오늘은 배터리의 에너지 밀도에 대해 이야기해보겠습니다. 이것이 순수 전기 자동차의 품질에 얼마나 큰 영향을 미치는지 알아보겠습니다. Is the energy density? First of all, we simply understand the battery energy density is something. 에너지 밀도는 중량 에너지 밀도와 체적 에너지 밀도의 두 가지로 나뉩니다.

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). 간단히 말해서 에너지 밀도는 배터리의 전력 저장 용량을 평가한 것입니다. 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. 마케팅 관점에서 보면 이는 정책 개발의 기준이기 때문에 소비자들에게는 분명 매력적이어서 순수 전기자동차 판매 과정에서 급부상하게 되었습니다. 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.

우리는 이전에도 말했듯이, 정책에는 에너지 밀도가 요구되며, 에너지는 새로운 에너지 지원 측면에서 기준 중 하나입니다. 에너지 밀도가 높을수록 새로운 에너지 보조금도 많아진다. 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. 배터리 용량을 늘리는 것은 양심적인 실천입니다.

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. 하지만 양심의 실천은 건강에 해로운 사람의 손에 들어가면 좋은 것이 아닙니다. 배터리 용량을 늘리기 위해 일부 제조업체는 배터리 안정성 요구 사항을 낮추었고 안전 위험이 증가했습니다.

따라서 업계 관계자에 따르면 배터리 용량이 매우 뛰어나 전기 자동차의 안전성에 영향을 미칠 것이라고 합니다. 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. 따라서 에너지 밀도를 추가하는 방법은 다양합니다.

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. 솔직히 말해서, 일반적으로 자동차의 가격이 좋은 것으로 결정됩니다. 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.