Can the energy density of the power battery determine the quality of electric cars?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

In fact, expand the propaganda for some new products and new technologies, and there is almost in all industries. But what these new gates are used for? How much value is there? After the consumer is wrapped around the cloud, it seems that it is not very concerned about these problems. I only feel that this thing is very cow.

Today we talk about the energy density of the battery, how much impact on the quality of pure electric vehicles. Is the energy density? First, we simply understand the battery energy density is something. The energy density is divided into two, weight energy density and volume energy density.

The current reference is the weight energy density. The calculation formula is: weight energy density = battery capacity discharge platform / weight, unit is WH / kg (Watt / kg ); The volume energy density calculation method only converts the weight of the above formula to volume, unit is WH / L (watt / liter). In simple, energy density is the evaluation of battery power storage capacity.

And such evaluation, it was not to determine the standard of good or bad electric vehicles, but the policy of policy power storage capacity on the company's powered lithium battery. According to the requirements, the company needs more than 300 watts / kg than energy in the 2020 lithium battery monomer, and the system is more than 260 watt-hour / kg. From the perspective of marketing, since this is the standard of policy development, it is certainly attractive to consumers, so it has become a plummer in the sales process of pure electric vehicles.

The evaluation of energy density is not completely mature, and the evaluation of energy density is not absolute fair, because this and the interests of the car enterprises are directly hooked. We have said before, and the policy will require energy density, and energy is one of the reference standards in terms of new energy support. The higher the energy density, the more new energy subsidies.

This has led to a military competition in the power lithium battery, and there are still many cats. To understand how the car company improves the energy density, you have to say from the formula just now: weight energy density = battery capacity discharge platform / weight. To increase this formula, there are two, the most direct method, one is to increase the battery capacity, and the other is to reduce the weight of the battery.

How to increase battery capacity is a conscience practice. There are many ways to increase capacity, and the most is from the battery material. At present, the three-dimensional lithium-ion battery is the highest power lithium battery type in China, while the phosphate iron battery is very fast.

However, the practice of conscience does not have a good thing in the hands of the unhealthy person, in order to increase the battery capacity, some manufacturers have lowered the requirements of battery stability, and the safety hazards have increased. Therefore, there is an industry insiders, and in the battery capacity is very good, we will affect the safety of electric vehicles. Another way is to mitigate the overall weight of the entire power lithium battery, which is actually not cured.

Some high quality power lithium batteries have a separate cell for each battery pack to fail to affect the entire battery pack when fails. To reduce the weight of the power lithium battery, the first rush is these cells. Either develop a new material makes it reduce the weight without affecting the protection of the battery, or the material directly reduces the material or the weight but even more intensity.

Therefore, there are many ways to add energy density. About the vehicle enterprises, cutting materials is a win-win method, and security issues are of course 60 tons. In the case where the structure and material of the battery do not have a uniform requirement, the power of high energy density is in a qualified, good or excellent level, and consumers have no way to measure.

Write in the last actual, in the measurement of the battery life, the simplest and rude method, or directly watch the total capacity of the battery. If you want to consider the safety of battery safety, the quality of the vehicle, the electric car is still a penny in the overall environment of the technology open, the overall environment of manufacturing cost is not large. Speaking straight, in general, or the price of the car decides good.

If the relevant part can improve the fairness of electric vehicle assessment standards, it is very positive for the progress of stimulating technology and the protection of consumer rights. Sun Wei, a researcher of the Institute of Science, my country, combed and detailed in the report of lithium-ion battery recovery technology. He also believes that paying attention to lithium-ion battery recycling is from the perspective of resource supply safety and environmental pollution.

In the future, the industry layout is combed, and the technical upgrade of equipment technology and pollution prevention and control levels, while guiding industrial policies to prevent local markets from overheating, causing market fluctuations. Cui Dongshu, a research expert in the automobile market research expert in China, pointed out that the strong battery company occupied the development of the new energy automotive industry, and the development of the future battery has brought huge crisis and challenge, so the battery recycling With resource utilization should be made by battery companies (rather than vehicle companies), especially battery leaders companies. Yang Qingyu, senior consultant of my country Battery Alliance, Beijing Green Zhihui Energy Technology Research Institute, Yang Qingwei, pointed out that the dynamic lithium battery recycling industry chain includes battery recovery, ladder utilization, pretreatment, material reuse, etc.

, industry chain fusion will be development Trend, but there are technical barriers, data barriers, and logistics must strengthen the upstream cooperation between the industry. It is understood that with the high-speed development trend of the new energy vehicle market, the new energy vehicle lithium-ion battery has entered a large-scale scrap period. On the one hand, the problem of waste and environmental pollution, on the other hand, the recovery technology and standards of lithium-ion battery, etc.

There are many problems in terms of further discussion. Sun Xiaofeng, Vice President of Beijing Science and Technology, summed up, the powerful lithium-ion battery involved in resources, technology, market, and policies, etc., is a systematic engineering, experts and scholars will adopt Beijing Science and Technology Association will be supplied to the government.

Reference decision consultation. .

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