When it comes to electric cars, most people’s first reaction is: “legs” are too short
The short “legs” here do not mean that the size of the four wheels of electric vehicles is too small, but rather bluntly that the cruising range of electric vehicles on sale generally cannot cover the driving scene that a vehicle should be able to support.
Frequently reported ridiculous problems encountered when driving an electric car, such as drastically reduced battery life, no electricity halfway, and almost freezing when driving an electric car in winter. While the shortcomings of the virtual battery life of electric vehicles are magnified several times in cold weather, it also lowers the trust threshold of potential consumers in this new form of energy.
Solid State Lithium Battery -Liquid State Battery
Three factors of electric vehicle battery life in winter:
The first problem is the lithium battery itself. As a chemical product of the battery, once the temperature is low, the internal electrolyte will become viscous and the lithium ion migration rate will slow down, resulting in a decrease in battery activity and affecting battery performance and capacity.
The second problem is the air conditioning system. In fuel vehicles, the air conditioning system relies on engine waste heat for heating. However, electric vehicles do not have an engine, rely on batteries for heating, and consume a lot of electricity.
The third problem is that low temperature leads to increased driveline resistance. The air density in winter is different from the air density in summer. In winter, the air density increases, leading to greater wind resistance, and electrical energy consumption increases sharply.
The “mileage anxiety” that has been deeply tied to electric vehicles since the birth of electric vehicles has not changed much due to technological progress. The reason is that power batteries, the heart of electric vehicles, have not yet seen disruptive innovations.
In 1881, the world’s first electric car crashed to the ground. The 42-year-old French electrical engineer Gustave Trouvé showed it for the first time at the Paris International Electricity Technology Exhibition. What drove it forward was bulky and dangerous lead-acid batteries.
In 1997, the first-generation Toyota Prius, the hybrid vehicle that will dominate the world in the future, was mass-produced and delivered. It used a 53.3 kg nickel-metal hydride battery pack manufactured by Japan’s Panasonic.
But before the Prius swept the world, Japan’s Sony successfully produced the world’s first commercial lithium-ion battery in 1991. The two characteristics of high energy density and fast charge friendliness make lithium-ion batteries a soaring ejector in the consumer electronics field.
To be continued…..
