Electricity-electricity hybrid power system for electric automobile

Abstract

The invention provides an electricity-electricity hybrid power system for an electric automobile, which comprises a lead-acid battery pack, a lithium battery pack and a slow-pulse quick charger, wherein the lithium battery pack is connected with an adjusting resistor in series, and then is connected with the lead-acid battery pack in parallel; and two ends of the slow-pulse quick charger are connected with the two ends of the lead-acid battery pack respectively. Because the lead-acid battery pack is connected with the lithium battery pack in parallel, the electricity-electricity hybrid power system has the advantages of small volume, light weight and long driving range compared with the conventional lead-acid battery power source, and also has the advantages of low cost and more proper price compared with the conventional lithium battery power source; furthermore, through the slow-pulse quick charger, the charging is more rapid.

Description

technical field [0001] The invention relates to a power system of an electric vehicle, in particular to an electric-electric hybrid power system of the electric vehicle. Background technique [0002] The emission of vehicle exhaust has become one of the main sources of air pollution today. 10 cities in my country have been listed among the 20 cities with the most serious air pollution in the world. my country's current per capita car ownership is an average of 10 per 1,000 people, but oil resources are already insufficient, and tens of millions of tons of oil need to be imported every year. With the development of the economy, if my country's per capita car ownership reaches the current global level—110 cars per 1,000 people, my country's car ownership will increase tenfold, and oil imports will become a big problem. Therefore, the research and development of electric vehicles in our country is not a temporary short-term measure, but a significant and long-term strategic c...

AI Technical Summary

Problems solved by technology

(3) The cost and usage cost of the battery should not be too high

However, the specific energy, specific power and energy density of lead-acid batteries are very low, and it is impossible for electric vehicles using this as a power source to have good speed and cruising range

Lithium batteries are chosen by more and more automobile manufacturers because of their high working voltage, large specific energy, small size, light weight, long cycle life, low self-discharge rate, no memory effect, and no pollution. Domestic automakers such as BYD, Geely, Chery, Lifan, and ZTE have installed power lithium batteries in their hybrid and pure electric vehicles, but the price of lithium batteries is relatively high

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