Everyone who is concerned about new energy vehicles should know that the biggest obstacle to the development of electric vehicle technology is that battery technology is difficult to break through.
In summary, the problem is concentrated on two points: battery energy density, cost price.
First of all, for consumers, their core needs are cruising range and fast charging speed.
To obtain longer cruising range, the density of power batteries must be increased. However, as the energy density increases, the safety risks will also increase.
According to statistics, in July 2020 alone, there were 14 publicly reported electric vehicle fire accidents.
There is no doubt that when the battery energy density increases, the greater the probability of thermal runaway.
At present, the average level of power batteries in the industry is generally 200Wh/kg for ternary lithium and 180Wh/kg for lithium iron phosphate.
Obviously, the battery energy density cannot be increased indefinitely.
Lishen Vice President Wang Nianzeng said that from 1991 to 2016, the energy density of batteries increased by an average of 5%-8% per year. Now, the bottleneck of 300Wh/kg will last for a long time.
While the energy density of the battery is increasing, controlling the cost and price is another difficulty.
At present, the manufacturing cost of batteries remains high. According to the statistics of Advanced Industrial Lithium Battery, the current average prices of ternary lithium and lithium iron phosphate are 1.08 yuan (USD $0) /Wh and 0.5 yuan (USD $0) /Wh respectively. That is, kWh per kWh is 1080 yuan (USD $154) and 500 yuan (USD $71) .
So if there is no subsidy, it is impossible for electric vehicles to compete with gasoline vehicles in terms of price and cost.
The Secretary gave a chestnut.
At present, the battery life of electric vehicles on the market generally reaches the level of 400km~600km, and the battery pack capacity is mostly above 60 degrees.
If you use a ternary lithium battery, an electric car, the battery cost alone has reached 65,000 yuan (USD $9286) .
It can be said with certainty that the importance of power batteries to new energy vehicles is almost equal to the importance of engines and gearboxes to traditional fuel vehicles.
And in the face of the bottleneck that is difficult to break through at this time, can we just wait and see? The answer is obviously no.
In fact, some companies have now developed corresponding super battery life. Once equipped with new energy vehicles, the mileage can exceed 2000 kilometers. Let’s take a look today!
Samsung solid state battery
Just in March of this year, Samsung Advanced Technology Research Institute and Samsung Japan R&D Center demonstrated a high-performance, long-life all-solid-state battery.
Compared with lithium-ion batteries that are currently widely used but use liquid electrolytes, all-solid-state batteries have greater energy density and use safer solid-state electrolytes.
Samsung’s researchers first proposed the use of a silver-carbon (Ag-C) composite layer as an anode.
Integrating the Ag-C layer into the soft pack battery prototype allows the battery to have a larger capacity, longer cycle life, and enhance its overall safety.
The ultra-thin Ag-C nanocomposite layer is only 5um thick, allowing the team to reduce the thickness of the anode and increase the battery’s energy density to 900Wh/L, while its volume is about 50% smaller than traditional lithium-ion batteries.
This Samsung solid-state battery allows electric vehicles to have a range of 800 kilometers and a cycle life of over 1,000 times.
Nikola recently launched a record-setting battery technology. The energy density of this battery reaches 1100Wh/kg at the material level and 500Wh/kg at the mass production level.
I don’t know, the energy density of Tesla’s battery is about 250Wh/kg, and the density of Nikola’s battery is almost twice that.
If the battery is mounted on an electric passenger car, the vehicle’s cruising range can be as high as 967 kilometers, and the vehicle’s cruising range can be maintained at about 800 kilometers even when it is full.
The size and weight of the battery have hardly increased, and can be used in existing vehicles. After more than 2000 charge and discharge cycles, the battery’s performance is still within an acceptable range.
The bipolar battery project developed by Dailem was named EMBATT-goes-FAB. In addition, IAV of Germany and ThyssenKrupp Automotive Systems Engineering Company participated.
This bipolar battery is similar to the current fuel cell on new energy vehicles. It is composed of electrodes connected in series and stacked. The main thing is that its electrodes are bipolar.
The popular explanation is that the active materials of the positive and negative electrodes are on the same common electrode carrier, that is to say, all the power supply units are in one area.
This will not only create more space, but also stack more active materials, so that the battery can store more energy, allowing electric vehicles to reach a maximum cruising range of 1,000 kilometers.
High energy density lithium ion battery
Florida International University in the United States has developed a new type of electric vehicle battery, this battery mainly relies on platinum and related chemical elements to increase energy storage, while having high energy density characteristics.
The research team said that this battery can increase the car’s cruising range to 1448 kilometers, which is obviously much better than new energy vehicles that are generally at 400-500 kilometers cruising range today.
And Professor Bilal El-Zahab and his team who are currently developing the battery are applying for a patent for a high-energy density lithium-ion battery.
New aluminum air battery
If you think that the 1448km cruising range is not enough for you, then the following battery technology will really refresh your three views.
This new aluminum-air battery was designed by British engineer Trevor Jackson. Trevor Jackson began researching this battery in 2001. However, due to the lack of advanced technology at the time, the battery development has been slow.
In recent years, with years of experience accumulation and technological advancement, he finally designed a brand new aluminum-air fuel cell.
The new aluminum-air battery allows electric vehicles to have a cruising range of up to 2414 kilometers!
Compared with today’s popular lithium battery, this battery has the characteristics of simpler, cheaper and easy to recycle, and the weight is quite light.
The energy produced by this battery is 9 times that of lithium-ion batteries, and the electricity produced per kilogram is 9 times that of ordinary batteries.
If this battery really reaches the application stage and popularizes in the field of new energy vehicles, it is undoubtedly the most ideal new energy vehicle battery.