Phosphate charging lithium battery back spring, what mean?

Phosphate charging lithium battery back spring, what mean?

The power lithium battery market has an important market signal – lithium iron phosphate ion battery back spring. The first signal is BYD released. Not long ago, BYD announced that it would launch a new generation of lithium iron phosphate ion batteries in the next year.

. At that time, the volume of the new generation of phosphate ion battery will reduce 50% higher than the energy density (i.e.

, the energy density is greatly improved), but the cost will be lowered by 30%; the second signal is from Chery. Chery EQ running now in the street will replace the current lithium-ion battery with lithium iron phosphate ion batteries. Prior to it, the Jianghuai IEv6e, Baojun E100 and E200 have been published in the “New Energy Automobile Promotion Application Recommended Model Catalog” (2019) catalog of “New Energy Automobile Promotion Application” (2019) catalogs published by two identity of lithium-ion battery and lithium iron battery.

The third signal is the 8th batch of “New Energy Automobile Promotion Application Recommendation Types” announced in this month. There are 246 electric vehicles in the catalog, including 169 models of lithium iron phosphate ion batteries, accounting To reach 69%, in the first batch and 2nd batch, this proportion is 45% and 58%. It is well known that the lithium ion battery is higher than the three-dimensional lithium ion battery.

. Not long ago, Tsinghua University Battery Safety Lab released the “Safety Study Report 2019”, its report show: According to incomplete statistics, from January 2019 to July, domestic and foreign media reported and battery-related More than 40 electric car safety accidents. In these cases, the accident vehicle with a three-dimensional lithium-ion battery reached 60%, while the lithium iron phosphate ion battery is only 5%, that is, only two cases – ZHAO ZUBEE and 5.

04 Hangzhou, and the cause of the accident The probability is not related to the battery, the former is the trunk, the battery is intact; the latter’s fire causes is not clear, but it is reported: or unrelated to the battery. Although the lithium iron phosphate ion battery has a significant security advantage, a fatal disadvantage makes it gradually disappeared on the stage of the passenger car – the energy density is too low. At the end of last year, most of the phosphate ion-ion batteries on the market were less than 90Wh / kg, which can do 120Wh / kg company more small, but the three-yuan lithium-ion battery can easily put the battery.

The energy density of the system is 120Wh / kg or more. This means that the same battery capacity, lithium iron phosphate ion battery is more than 25%, or even more. Today, the lithium iron phosphate ion battery is re-adopted, the reason is nothing more than one – its energy density is greatly improved, enough to reach most car enterprise design needs.

. Take Chery EQ as an example, although the new EQ uses a lithium iron ion battery, and the endless mileage in the NEDC condition is the same, it reaches 301km, but its insulation quality is no increase, only 966kg 79kg less than the current. All this has to be attributed to the lithium iron phosphate ion battery it equipped.

According to the data of the Ministry of Industry and Information Technology, the energy density of its battery system has reached 140Wh / kg, and the level of NCM523 and NCM622 has been basically chased.. Perhaps many people will return the back of the lithium iron phosphate ion battery to cost.

Indeed! Compared with the ternary lithium ion battery, the cost of the iron lithium-ion battery is indeed slightly lower.. According to the “National Energy Information Platform”, the price of the current lithium power lithium battery module is 0.

76-0.8 yuan / WH, and the three-dimensional lithium battery module is 0.9-0.

95 yuan / WH, which is also electricity each. The former should be less than 100 yuan than the latter. If it is calculated by the battery capacity of Qi Rui EQ, the car cost can be reduced by 3000 pieces.

. It is indeed a lot of costs about this top with 70,000 cars..

However, Chery EQ has a higher energy density of three-dimensional lithium-ion batteries – about 160WH / kg (this is also the average level on the market, at this level of independent brands, most of them can do more than 400km life) , Squeeze, raise the battery life to 401km, which clearly helps it get higher policy subsidies – more than 7,000 yuan subsidies. The final cost, I think the difference is not very big, and even the EQ, the EQ, the mileage will be more cost-effective..

Therefore, I think that the reason why the lithium iron phosphate ion battery is back, and the deeper reason is that the vehicle enterprises have changed from performance orientation to safety orientation in the selection of the technical route of the pure electric vehicle.. For a long time, in pure electric cars, all major cars have a misunderstanding, which is blindly pursuing the endurance mileage of pure electric cars, so that it can solve the mileage anxiety of pure electric car users on the high-decline.

. But in fact, the cause of this “condition” is not in the endless mileage, but the convenience of charging. Just like my own GM8, even if the battery life is only about 400km, I don’t have any anxiety, because I am very convenient, I can do it in a few minutes.

. Pure electric car is not. Behind the blindly pursuit of the endless miles, it must be safe for safety.

. According to experts in automobile safety and energy-saving national key laboratories, the rise in the continuum mileage means that the battery ‘is higher than energy (reflecting electrical energy of electrode material in the unit quality of the electrode)’..

More than energy and security are contradictory things, in general, high-than-energy batteries must be more unsafe, because the electrochemical characteristics determine it more active, the temperature of the accident will become lower.. In fact, major cars also gradually realized that consumers in pure electric markets, concerns about safety have far exceeded the worry of the lifting mileage, although there is no investigation institution to use data, but from “Spontaneous”, “self-ignition” that consumers open closer, seem to verify this.

Some people say that the pure electric car market is reverse, the lithium iron phosphate ion battery is now to withdraw from the “old things” of the passenger car market, actually can “turn ash to ignition”, reappear in the perspective of consumers. But I think this is a good thing. This, consumers can’t see.

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