Friday, October 31, 2014
A Second Life for the Electric Car Battery
As I wrote in a recent Times article on electric car batteries, scientists are expecting big breakthroughs in battery technology over the next five years that will increase the range of electric cars while reducing their cost. But even with these advances, researchers acknowledge that any rechargeable battery will gradually lose its capacity to store energy after repeated cycles of charging and discharging.
Once storage capacity falls below a certain level, the battery can no longer provide the range that electric car owners will expect, according to Micky Bly, the executive director of global battery, electric vehicle and hybrid engineering at General Motors. For its new Chevy Volt, GM expects that level to be around 60 to 65 percent of the battery’s original capacity, he said in a telephone interview.
At the same time, with most of a battery’s useful life still intact, automakers anticipate that it could serve other, less demanding purposes than powering a few thousand pounds of car.
A number of projects and new ventures are already under way to explore second-life applications for lithium-ion batteries. G.M. has announced a cooperative agreement with ABB, an energy technology company. And Nissan has formed a joint venture called 4R Energy with the Sumitomo Corporation.
This month, researchers at the National Renewable Energy Laboratory, financed by the Department of Energy, announced their own initiative in this area, a collaboration with academic and industry partners.
From a technical perspective, a special area of focus for the laboratory’s research will be repurposing these batteries for Community Energy Storage systems on the electric utility grid, according to Jeremy Neubauer, a senior engineer in the lab’s energy storage group. If all goes as planned, in the smart grid of the future electric utilities would distribute thousands of these Community Energy Storage packs throughout the grid to help them manage power flow, especially during peak times or outages.
One pack would store 25 to 50 kilowatt hours of electricity, which could provide power for a few hours to four or five homes. Packs of this size would require stringing together two or three electric car batteries, and the compact size of these batteries lends itself to this purpose, Mr. Neubauer said. He also expects that using second-life batteries would be cheaper for the utilities than buying new ones.
But beyond the technical feasibility, what’s new about the lab’s research will be the focus on testing new financial and ownership models for the car batteries. Ahmad Pesaran, principal engineer on the lab’s study, said, “We want to prove the battery has value beyond its use in the car, and by creating business models, to realize this added value, ultimately lowering the cost of owning the car for the consumer.”
Tuesday, October 14, 2014
T Boone Pickens Is Wrong Electric Vehicles Can Haul Cargo
T. Boone Pickens supports electric vehicles—as long you dont claim that electric propulsion can work for big-rig trucks, locomotives or cargo ships. The business magnate and corporate raider, who made his fortune in the oil and gas industries, stated that "the battery will not move an 18-wheeler" and that internal combustion engines using natural gas or diesel are the only way to haul cargo. Is he right?While there are a number of companies, like Smith Electric Vehicles or EVI USA, building medium duty all electric trucks, Class 8 18-wheel trucks are much bigger. Class 8 trucks have 80,000 pounds of hauling capacity versus the 20,000-pound capacity of smaller trucks. Yet, there are several companies experimenting with electric Class 8 trucks.
For the most part, these trucks are for around-town use rather than long hauls. The clearest use-case for an all-electric Class 8 truck is hauling containers between a shipping facility, like the Port of Los Angeles, and rail terminals. Thousands of diesel powered Class 8 trucks operate daily in that corridor, and are a major contributor to local air pollution.
In the Electric Drayage Demonstration—a project begun in 2012, and extending to 2015—Class 8 trucks from four companies are in daily use in test fleets operating between the Port of LA and nearby rail terminals. Three of the models are all-electric trucks, built by Balqon, US Hybrid and TransPower. These have battery pack ranging up to a huge 380 kilowatt-hours; high powered charging units up to 160 kilowatts; recharge time as low as 1 hour; and a driving range up to 150 miles.
Saturday, October 4, 2014
Canberra powers ahead with Better Place electric car network
Within a few weeks, charge spots where drivers can plug in their vehicles will be installed. Twelve foundation members have signed up to work with Better Place Australia in Canberra, including the ACT government, ActewAGL, Lend Lease, Crowne Plaza and the ACT Electric Vehicle Council.
"We chose Canberra because there are a large portion of two-car households with garages," Better Place Australia chief executive Evan Thornley said. About 54 per cent of Canberra households have two cars or more and 89 per cent have off-street parking, which makes it ideal for Better Place to launch, because garages are preferred charge spots.
"Canberra is the first stage in the process of delivering electric cars around Australia and having the facilities in place to service them," Mr Thornley said. Better Place recently signed a deal with ActewAGL, worth $60 million over 10 years, to purchase 100 per cent renewable energy for the electric car-charge network in Canberra. "We will be paying for everything besides the car," he said. The battery, the charging, plug-in and so forth. Consumers will just have to pay us a single membership fee and that will be determined by the distance people drive."
The Renault Fluence ZE, a five-seat family sedan automatic with a top speed of 135km/h, is expected to arrive on the local market in the middle of next year, priced between $30,000 and $35,000. Batteries will be $12,000 but the monthly membership fee is still being calculated.
"I can say that if you are paying $80 a week for petrol now, it will be cheaper to have an electric car," Mr Thornley said. "The reality is that petrol costs are increasing and battery costs will decrease as more people purchase electric cars. Therefore, it will only become cheaper to buy an electric car and run one."
Property giant Lend Lease invested $10m in Better Place Australia in 2009 and has helped to construct some of the infrastructure for the rollout.
Thursday, September 25, 2014
Wireless Charging Of Electric Vehicles While In Transit
Improvements with the electric transit infrastructure unfold at light speed. Active wireless charging in transit with electric vehicles, in this case electric buses, is taking place. Korea has broken through with accelerated wireless power efficiency with the Online Electric Vehicle (OLEV). This technology from the Advanced Institute of Science and Technology (KAIST) is setting another standard that increases the development of electric vehicles and addresses the (slight) time issue of charging. This breakthrough works for personal or public transportation presently, allowing vehicles to be charged while stationary or while moving. “This is accomplished by solving technological issues that limit the commercialization of electric vehicles such as price, weight, volume, driving distance, and lack of charging infrastructure,” ResearchSEA writes.
Thursday, September 11, 2014
Forget Battery Swapping Tesla Aims to Charge Electric Cars in Five Minutes
Electric vehicles take too long to recharge. To charge a Tesla Model S just halfway takes five hours at a typical home or public charging station. But in its effort to make electric vehicles more practical, Tesla Motors is quickly reducing the charging times. Last September, it unveiled a network of “supercharging” stations—designed exclusively for its Model S and future electric vehicles—that could charge a battery halfway in 30 minutes. In May, it announced an upgrade that cut that time to 20 minutes. Now Tesla’s chief technology officer, JB Straubel, says the company eventually could cut the time it takes to fully charge the battery to just five minutes—or not much longer than it takes to fill a gas tank.Straubel isn’t referring to the battery swap technology Tesla recently unveiled (see “Why Tesla Thinks It Can Make Battery Swapping Work”). That system doesn’t charge batteries quickly. It simply takes out a depleted battery and replaces it with a fully charged one. He’s talking about what might be a more appealing option for drivers: recharging the battery in your car while you wait.
“It’s not going to happen in a year from now. It’s going to be hard. But I think we can get down to five to 10 minutes,” Straubel said in an interview with MIT Technology Review. He noted that the current superchargers, which deliver 120 kilowatts of electricity, “seemed pretty crazy even 10 years ago.” Conventional public charging stations deliver well under 10 kilowatts.