What is the biggest problem of pure electric car?

Source: 2020 - 03 - 29 and clicks: time why not use the lithium iron phosphate as the anode material of lithium ion battery? , a concept first, correct 'lithium is what we usually call' lithium ion batteries' short, and you say 'ferroelectricity, lithium iron phosphate is used as the anode of lithium ion battery, it is' lithium. Good, now answer, said a simple version of the shallow type summary: tesla adopts panasonic lithium battery, 18650 NCA as positive, design the complex battery management system, to ensure and improve the efficiency and safety of battery operation. As to whether to determine the safety, this can't answer, if you want to say that spontaneous combustion, I also want to say gasoline vehicles also spontaneous combustion in the summer. Pure electric car what is the biggest problem ( It can use gasoline, not to mention, plug-in hybrids and pure electric hybrid vehicles) 吗? From anxiety, driving is not travel, because the battery can store the energy density is too low, now the car battery is generally 100 ~ 150 wh/kg energy density, the value of the gasoline is about 10000, so even if you are like a turtle carry plenty of battery, you can't solve the problem. Every day we make fun of the electric car charging ran half of power to do, low energy density is harmless. The battery technology's biggest problem is the low energy density, lags far behind Moore's law. Don't talk about lithium, even if they do not have a high energy density, the key is that they are far from practical also so as to why we do not use batteries, lithium iron phosphate is the first reason I want to say, is capacity, lower energy ( Energy is the capacity of the Ah get Wh) multiplied by the voltage In practical applications, the car battery is series-parallel combination, so it is necessary to improve the voltage by series-parallel. At this point, a single battery voltage and consistency between different battery capacity is very important, low capacity is not prudent. My homework is in the home to do some research some of the lithium iron phosphate promoted the development of the product, also see some other material together, lithium batteries and electric cars, so crap here ~ ~ ~ now luxuriant half academic smidar ~ ~ ~ in order to compare several positive data, we must introduce this chart, the five important functions standard: electric power, life, cost, safety, energy. Comparative data for the NMC/NCA triples data/NCA, LCO lithium cobalt oxide, LFP lithium iron phosphate, LMO manganese acid lithium. NCA and sliding are Cousins of the speculation, so here they are grouped. LCO = LiCoO2, layered, NMC = LiNixMnyCozO2, layered, NCA = lini1 - y- Zcoyalzo2, layered, LMO = LiMn2O4 spinel, LFP = LiFePO4 olivine from the picture, we can see: league of data is the lowest energy (energy Sadly, low volume is one thing; 3. 4 v low voltage is the problem of conflict example is the lithium nickel manganese spinel, voltage is 4. 7v) 。 Length limit, there is no charge and discharge curves. Power is not low, Since the step-down lithium iron phosphate in the pilot study, 5 c can do 130 mah/g decompression ( Of course PHOSTECH can also) Carbon + data of nanoscale multiplier is still very powerful! 。 The optimal life and safe life mainly depends on the polyanion PO43 - Guess so, oxygen is more easy to combine with electrolyte, and electrolyte low reactivity. With three different metadata, some phenomena such as the generation of air bubbles is more simple. On the number of life, it is generally believed it can & gt; 4000 cycles. Cost cost, cost of lithium iron phosphate is not bad, second only to the LMO manganese acid lithium data ( This thing, air combustion, manganese source and cheap) The second is competitive. The raw material of lithium iron phosphate, lithium iron phosphate is relatively cheap, but need some capital for nano powder, and need of heat treatment in an inert atmosphere, for a variety of technological requirements, resulting in the cost of data ( About 10 w/t) In China is not as low LMO ( 6 ~ 7 w / t) But with the NMC ( 13 w / t) Compared to the LCO ( More expensive) Still cheap. Reason: the more expensive than cobalt nickel ( China's poor cobalt ah) , nickel to more expensive than ferromanganese, what kind of raw material, what is the capital.