Car of new energy resources is in last few years the popular topic of car city, also be the direction that automobile industry country encourages development energetically, made a series of give aid to policy, then each old car manufacturer contends for project of car of new energy resources of photograph mount a horse. But, we serve as average consumer, car of new energy resources is worth after all undeserved buy? Small today make up will to everybody analyse an analysis.
Mention car of new energy resources, we must the dynamical source of car of respecting new energy resources, batteries, at present the car has 3 kinds of kinds with dynamical cell, it is report of 3 yuan of lithium, phosphoric acid respectively Tie Li and battery of titanium acid lithium, these 3 kinds of batteries have actor drawback each, advantage of report of 3 yuan of lithium is coequal n bulk and weight the smallest, defect is to charge commonly circulate 1000 times above attenuation is very fierce, and security is poorer. Advantage of lithium of phosphoric acid iron is to charge circular time is a bit long and security is better, but defect is microtherm n attenuation big and weight of coequal n bulk also compares 3 Yuan Li report big many. Titanium acerbity lithium compares an extreme, the advantage is so-called charge to be able to amount to attenuation 10 thousand times circularly not big also, and security is very high, but an apparent weakness is weight of coequal n bulk bigger, the in part that has pool of vintage lead acerbity water and electricity basically was controlled.
So we are taken energy density is the at present biggest, tesla also is compared with benzine in phone of use 3 yuan of lithium, calorific value of 1 kilogram of petrolic (or energy) it is 43 million joule about, the calorific value of 1 degree of report is 3.6 million joule, that is to say 1 kilogram of benzine are equivalent to 12 degrees of report about. Next we look again at present the most top class the energy density circumstance of 3 Yuan Li report, at present the most top class report of 3 yuan of lithium has a pine to fall, the manufacturer such as 3 ocean, SamSung, LG, when n of batteries of 18650 sheet section can achieve 3500 milliampere, every weigh 50 grams left and right sides, total n of core of report of about 77 monomer is equivalent to 1 degree of report, wait plus batteries protection system and crust, the batteries of n of about 1 degree of report is current the lightest can accomplish 5 kilograms or so, the energy of 1 kilogram of gas that says above that is equivalent to 5 × 12=60 kilogram batteries.
But the car of electric power drive has a profit, that is energy utilization rate tall, the thermal efficiency of gasoline engine does not exceed 40% generally at present, but the efficiency of electric machinery can exceed 90% . So such one convert, adding 1 kilogram of petrolic to change energy effectively is not to be equivalent to 60 kilograms of batteries, be equivalent to making an appointment with the effective energy of 27 kilograms of batteries however. Average car gasoline tank can join 40 kilograms of benzine, that changes batteries to be equal to the batteries group ability that wants many kilograms 1000 to make sure effective energy comparatives, so this still comparatives bloodcurdling, and this still used the most top class batteries ability to achieve.
Actually at present manufacturer of car of domestic new energy resources won't use so advanced cell, their energy density far the 1000 watt-hour ÷ that short of says above me 5 kilograms of =200wh/kg. (watt-hour of =1000 of 1 degree of report) but the power bulk that electric car manufacturer won't press benzine car will deploy electric machinery, the electric machinery power that they provide compares benzine car power that is much smaller, achieved the result that reduces bad news report so.
Market is at present common electric car 1 degree of electric energy run 8 kilometers, also comparative with 5 kilograms of batteries can add boat 8 kilometers, so run 100 kilometers are about 62.5 kilograms of batteries come add boat. So we contrast again the circumstance of oily car, 1 kilogram of benzine have 1.39 litres about, the car that saves oil commonly so runs 100 kilometers need 5 kilograms of gasoline. Calculate electric car to run so 100 kilometers use best cell, the 62.5 ÷ 5=12.5 that weight also achieves benzine weight times. Below the circumstance that reduces considerably in car power that is to say, 1 kilogram of benzines can be replaced with 12.5 kilograms of best batteries, this is current best current situation.
Every family spends so much money to buy a car, just do not consider to leave inside the urban district only, if according to long-distance demand, that day of 800 kilometers do not charge to just calculate amount to mark basically, the n of that batteries is about to achieve 100 degrees of ability enough, also have 500 kilograms at least with top class batteries so. And by fill one night slow 8 hours to be full of 100 degrees of report to calculate, those 1 hour also communications center receives 12.5 degrees of report, charging current is equal to 12.5 × 1000 ÷ 220=57 ampere. But long-distance you are impossible to be found in little place charge of picket, look for guesthouse only ability reality. Calculate you to press ammeter overpay charge of electricity at this moment, the electrical outlet of general guesthouse also is impossible to be able to bear or endure get 57 electricity.
What need a specification finally is, above computation all did not consider a car to drive the issue of air conditioning, electric car summer attends a meeting air conditioning report of extraordinary waste time, open air conditioning to be able to make add boat quick shorten directly in the winter. So the place on put together is narrated, car of new energy resources suffers the bottleneck of technology of batteries of be confined to, current and essential inextricability the problem from angst of the major problem, question with charge difficult, course of development, still be in to measure class above at least with the difference of benzine car. So car of new energy resources still is ideal only really very plump, reality very the thing that bone feels, unless be restricted to buy,be restricted to go city, other and current do not suggest to buy really.
