Electric vehicle power lithium battery cost first or safety first? As the core power source of electric vehicles lithium battery safety and cost issues are often discussed as a topic, with the withdrawal of national subsidies for electric vehicles, the importance of battery cost reduction for the development of the electric vehicle industry is gradually highlighted. To ensure the safety of the use of power lithium batteries, so as to promote the development of lithium batteries and related industries.
New energy electric vehicle power lithium battery cost first or safety first?
The development of new energy vehicles has become one of the national strategies, the development of new energy vehicles is not only China's development goals, but also the world's unified consciousness. First of all, new energy vehicles in all the focus, the first:Specialized management mode and operation of new energy buses gradually breakthrough, new energy bus breakthrough can also bring direction to the development of new energy vehicles. But now the real question is, for the electric bus lithium battery, the cost or safety is the first.
Electric vehicle power lithium battery cost first, safety first, in fact, both are important. Power lithium battery management system should be mainly concerned about the safety factor, but on the other hand, in order to ensure safety, high quality materials, lithium battery technology requirements are also high, safety does not touch the bottom line of the cost, high demand means that do not care about the cost, which is certainly not possible, acceptable cost is the key is the starting line, only in line with the principles of economic regulations transport enterprises, these can be accepted.
In the past two years, lithium iron phosphate batteries began to gradually enter the communications industry. In the three major operators, the mobile application of lithium iron phosphate battery is relatively more. Affect the large-scale use of lithium iron phosphate batteries, mainly because of the high price and concerns about reliability. Now look, there is not a perfect lithium battery, but compare to compare to go, or to put safety in the first place.
If the bottom of the barrel, the power lithium battery itself is safe enough, the design of peripheral engineering will become unparalleled freedom, the cost will also be answered.
Power lithium battery cost analysis
If we look at the details of manufacturing, the cost of lithium battery can be divided into three parts: core cost, module cost and manufacturing cost. The rapid expansion of the power lithium battery industry chain brings down the cost of raw materials, especially the main materials that occupy more costs (positive electrode, negative electrode, electrolyte, isolation film), and other important materials include the steel shell/aluminum shell of square shell cells. For example, the isolation film material, the cost has been reduced nearly three times in the past five years.
At present, the cost of the power system (three electric) of pure electric vehicles accounts for 50% of the total cost, of which the cost of the power lithium battery accounts for 70% of the total cost of three electric, lithium battery structure, the cathode material is the most expensive, accounting for about 45%. Considering the existing excess capacity and lithium iron phosphate terminal demand is far less than the ternary lithium battery, so I give the forecast is that by 2020, the terminal cost of lithium iron phosphate will dip to 900 yuan, while the ternary lithium battery will dip to 950 yuan.
Electric vehicle lithium battery to enter the normal market survival stage, the first thing to solve is the cost problem. As the body chassis and other technologies have long been mature, the real reason to limit the cost of electric vehicles, it falls on the battery. In general, the cost of lithium battery accounts for one-third to one-half of the total cost of the vehicle, due to the cost control of different manufacturers of the body chassis and the bargaining power in the battery procurement has variability, so the final embodiment of the cost ratio will be slightly different.
It is predicted that new energy vehicles will still compete with internal combustion engine driven vehicles in the market in the next 5 to 10 years. Doing a good job of planning the whole vehicle cost of new energy vehicles and optimizing the cost of power lithium battery is one of the core work of car companies and parts suppliers in the future years.
Power lithium battery safety analysis
With the popularity of new energy vehicles, people's demand for power lithium batteries is increasingly strong. However, since the recent frequent fire incidents of new energy vehicles, the investigation results show that most of them are related to the power battery, so the safety of the power lithium battery has become a hot topic of discussion.
Almost all of the design of power lithium batteries are branded with safety, waterproof design of the shell, strength design of the battery pack, thermal management system, BMS temperature monitoring, smoke alarm, overcharge and overdischarge prevention procedures, etc.. Safety is the top priority of power battery pack.
Li-ion battery safety accidents, whether it is the aging of the battery cells or their own quality problems brought about by internal and external overheating, which leads to thermal runaway, or due to traffic accidents or other types of abuse caused by thermal runaway, accidents always go through the process of violent reaction of the battery cell material, if this point can be blocked, the battery can fail, but never ignite and explode.
For the field of new energy vehicles, especially the safety of power lithium batteries, we can not avoid, and can not escape. In short, we should strive to solve the problem of power battery intrinsic safety, to protect the healthy development of the new energy vehicle industry.
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