Electric cars have a much longer history than traditional gasoline vehicles. As early as the 1830s, people used dry batteries to drive cars, but the truly rechargeable electric cars did not appear until after 1880.
In 1889, the US Patent Office authorized a patent for a pure electric vehicle, and the concept was quite advanced. This is not an illusion of a civil inventor, the applicant is William Griscom from Haverford College. He is an electrical expert and an industrialist, creating a ship power company.
The main technical content of this patent is to drive the train with a rechargeable battery, the front of the car is driven by a battery, and the passenger compartment is loaded with passengers. When the battery is exhausted, the front of the car will be left to charge and the train will be replaced with a new, fully charged front. This idea of increasing battery life by means of battery replacement is still valuable today.
This patent mainly describes battery-powered trains, but can also be applied to electric vehicles. The patent also introduces the concept of superimposed battery packs, which consists of 144 batteries to form a battery pack, which is switched by multiple switches, one part of which is damaged, and the other department can still be used, but it has already established the prototype of the battery management system.
The earliest battery management system
Two years after the patent was granted, William Morrison produced the first successful electric car in the United States in 1891. Since then, innovations around electric vehicles have emerged and commercialization has matured.
Until the breakthrough in fuel vehicle technology, electric vehicles gradually withdrew from the historical arena. In the context of the oil crisis and the promotion of environmental protection, electric vehicles have once again attracted people's attention.