Building Better Batteries for Electric Cars - lithium battery pack

To reduce our huge interest in oil, the government and the automotive industry are working together to encourage car buyers to consider electric power when buying cars.
While industry watchers may argue about the speed at which consumers transition to electric vehicles, they generally believe that this transition requires significant improvements to the batteries that power these vehicles.
Even the White House has agreed to acknowledge in a recent blog post that "the lack of affordable, powerful batteries is a particularly high barrier to widespread adoption of electric vehicles.
"In the short term, reduce the cost of the battery --
With it, the price of the vehicle-
It will mainly come from better manufacturing technology and more batteries.
Researchers and scientists will improve durability and range to a large extent.
Italian scientist Alexander Walta made the original battery in 1800.
Volta fills the container with alternating zinc and copper plates and separates each pair with cardboard discs soaked in salt water.
His battery generates a steady current through a chemical reaction, forcing the zinc disc (negative pole) to release electrons, and the copper disc (positive pole) to capture electrons.
Today's EV battery is no longer a container like Volta, but follows the same basic principles.
For two centuries, the gradual improvement of the whole chemistry, design and materials has led to lithium-
Lithium-ion-based batteries rely on lithium-ion to shuttle back and forth from the anode and cathode.
In short, lithium-
According to Venkat srinfeld, Battery Manager, Energy Department automotive transport technology project, Ion batteries provide higher energy density than other previous battery systems
Supported project managed by the University of California, Berkeley, Lawrence Berkeley National Laboratory.
Compared to nickel-
Metal hydrogen batteries used by Toyota Prius, such as lithium-
Ion batteries of the same weight and volume will increase the energy density by two to three times. Srinivasan.
All vehicles with electricity as the primary power supply, such as Nissan Leaf or Chevrolet Volt, use some form of lithium-
Ion Chemistry in batteries
Jeffrey P said the batteries will be ubiquitous in at least the next decade or twenty years with enough room for innovation
Chamberlain, the Argonne National Laboratory near Chicago, is a laboratory sponsored by the Department of Energy.
Lithium is mixed with other materials in the cathode of the battery.
The materials used determine the voltage of the battery and the amount of lithium that the cathode can accommodate;
Increasing both increases energy density, Dr. Srinivasan.
In Argonne, researchers are working on a new mixture of nickel, manganese and cobalt as a cathode.
It has been shown that mixing these materials in different quantities and assembling them in different structures can double the energy capacity of the cathode.
Argonne has begun to grant patents for this material to different battery manufacturers. The result, Mr.
Chamberlain said it would be the battery "squeezing more energy into a smaller package with lower manufacturing costs and longer use.
"Similarly, researchers at Argonne and elsewhere are trying to replace the commonly used carbon anode today with silicon as an anode.
During the charging cycle, the anode collects the lithium ion and then discharges the lithium ion when the battery supplies power to the motor.
In theory, the pure silicon anode is likely to increase its energy capacity by ten times.
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However, when Silicon collects lithium ions, the expansion trend of silicon hinders efforts to reach this maximum.
Therefore, researchers are mixing silicon with materials such as graphite to find a balance that can solve both physical challenges and improve energy density. Chamberlain.
Even if these new advances move from the lab to the production line over the next decade, in the short term, the maximum cost reduction for the battery pack will come from reducing manufacturing costs, Alex A said.
Molinaroli is a company that manufactures lithium, president of Johnson Controls's Power Solutions Group
Ion batteries from BMW, Daimler and Ford. Because lithium
Ion, a relatively new technology that powers cars, said: "It takes time to understand how these batteries perform after years of use . "Molinaroli.
Because electric vehicle batteries are now part of the drive train, "the performance and durability requirements of these batteries are much higher than that of lead
"Acid starts the battery or the battery in the laptop," he said . ".
Lack of decades of road
Testing data mainly from electric vehicles, manufacturers must Over-manufacture batteries, add materials and safety features to ensure they meet driving needs
The train is guaranteed, he said. Molinaroli.
He estimates that this excessive compensation accounts for 50% of the material used in the current battery pack.
A common measure of battery energy density is the number of kilowatts
Considering its weight, it can generate electricity for several hours.
As the battery is the most expensive part of the car, automakers tend to be tight --
Taking into account the competition information, keep a tight eye on the actual price.
Even so, Mike Omotoso, J. 's vehicle power train forecasterD.
Electricity and Associates, estimated cost of approximately $750 to $800 per kilowatt todayhour.
Electric vehicles are flat with gasoline-
From a cost perspective, most analysts estimate that the cost of the battery must be close to $200 per kilowatt. hour.
At Johnson control, when the cost of the battery reaches $200 per kilowatt, the company expects the price to be flat
The hourly plus gasoline price is always above $4 per gallon.
Mary Ann Wright said that once you reach these levels, "you have a good business case that will become a more relevant conversation as energy prices rise, vice President, Global Technology and Innovation, Power Solutions group. Ms.
Wright further estimated that there were still 10 years left for the parity point, but he gave two warnings.
"You have to take into account that the gasoline engine will also become more fuel --
It's very efficient during this time, "she said.
"The technology is not stagnant.
"And parity must be considered as the total cost of ownership during the life of the car.
"So while sticker prices may always be higher, the maintenance and operating costs of electric vehicles over the life of the car will be lower compared to gasoline --
Electric cars, "she said.
Alexander Walta's invention won him the royal title and place of £ 10,000.
Laid the foundation for the modern electrical era.
With continuous improvement, electric vehicles are able to match prices and performance with gasoline --
Strong competitors, the impact is also far-reaching.
A version of this article appears on the March 31, 2011 New York edition F4 page with the title: make better batteries for electric vehicles.
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