1920-1990 stage: With the development of Texas Oil and the improvement of internal
combustion engine technology, electric vehicles gradually lost their advantages after
1920. The automobile market is gradually being replaced by cars powered by internal
combustion engines. Only in a few cities there are few trams and trolley buses, and a
very limited number of battery cars (using lead-acid battery packs, which are used in
golf courses, forklifts, etc.).
The development of electric vehicles has since stagnated for more than half a century.
As the oil resources flowed to the market, people almost forgot the existence of
electric vehicles. Relative to the technologies used in electric vehicles: electric
drive, battery materials, power battery packs, battery management, etc., can not be
developed or used.