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ARE BATTERIES GREEN OR BLACK?
| 题名： | ARE BATTERIES GREEN OR BLACK? |
| 正文语种： | eng |
| 作者： | DAVID FRANCIS |
| 摘要： | A few months ago, we mentioned a fairly obscure study by British engineering consultancy Ricardo, that suggested that it takes 15,000 miles for an electric car with a small 30KW/hr battery to reach "break-even" against a petrol car, and about 35,000 miles for a 100KW/hr electric car to do so. That rather niche discussion between engineers subsequently broke out into a fairly major Twitter spat (not involving Ricardo, it should be said), so it is worth trying to get to the bottom of the argument. The basic idea is that batteries take a huge amount of energy to manufacture. That much is unarguable - for example, battery gigafactories can only be sited in places which have direct access to the 400KV backbone of the electricity grid (a bit like putting a logistics hub next to a motorway junction). Hence all battery electric vehicles (BEVs) start off with a CO_2 deficit against a petrol car, the question being how long it takes before the BEV produces less overall CO_2 than its petrol rival. To answer that, you have to know the amount of electricity used to make the two types of cars, the amount of CO_2 in the grid electricity (very low in nuclear-powered France, catastrophically high in coal-dependent Poland), and the CO_2 produced by the petrol alternative. |
| 出版年： | 2021 |
| 期刊名称： | AM-Automotive Management |
| 期： | Feb. |
| 页码： | 12-13 |
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