Improving Plug-In Electric Cars
June 4, 2009 by Miranda Marquit
Working toward better charging techniques for car batteries. Image credit: Eduloqui
One of the issues that comes with plug-in autos, whether they are hybrid or straight-up electric, is the ability to charge the battery. It can be difficult to charge batteries on the go, and it can take hours recharge a car battery to useful capacity. However, with increased emphasis placed on the development of cars that rely less on gasoline, it is little surprise that researchers and inventors are working on the problem of charging. Two of the more interesting efforts include roads that can recharge batteries and batteries designed to charge up faster.
In Daejeon, South Korea, the idea of a "recharging road" is being tested at the Korea Advanced Institute of Science and Technology. If the tests show that the idea is feasible (right now it's being tested on golf carts), charging strips would be placed in strategic places around town, embedded into the road surface. Electromagnetic induction would be used to charge the batteries of cars that contain a special magnetic, sensor-driven device. Powering the strips themselves would simply require a hook up to a standard electric grid. But if renewable power is the goal, it would also be possible to use solar power to provide the electricity needed for the charging strips.
To solve the problem of lengthy battery charging, MIT is working on improved batteries that could be charged in a matter of minutes -- rather than over the course of hours. The key is in speeding up the way that lithium ions are exchanged in the batteries used in cars that use electricity for some of their power. MIT researchers claim that they can use a coating of lithium phosphate, similar to glass, to speed things up a hundredfold. Within three years, with the new production process, the researchers claim that the batteries could be ready for the market, allowing commuters the ability to charge up their cars in the amount of time it takes to use the bathroom at a rest stop. Unfortunately, a standard household plug is not an option for these types of batteries. Additionally, the charging stations in use right now would be inadequate -- they would have to be upgraded.
As technology advances, it will be interesting to see what researchers come up with next in terms of powering our cars.
© 2009 PhysOrg.com
Mar 12, 2009 |
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This would be interesting if their wasn't already at least 5 Lithium batts types that can recharge in 15 minutes to at least 80% and other batts like lead, Ni-cad that can too.
I drive and build EV's and keep up with such things that my group, The EVDL list, has tested.
If you do a Google search with the following terms, you can see that it is already being implemented throughout Israel. I am not up to date with it, but i believe they have been looking to implement in other countries too;
israel charging swap better
Charging an EV from a home power outlet in the minutes range requires mammoth levels of electrical current. Assuming the cabling (which i doubt) and fusing of your average home were capable of providing the gigantic levels of electrical current to charge within minutes, household power outlets/ plugs are nowhere near capable for the job.
I have no idea if it is even possible, or what it would cost to bring up the electrical current capacity of a home to charge within minutes. If it is possible to upgrade electrical current capacity of a home (and fit suitable plugs), i wonder how the cost would compare to using a super fast charging battery to charge the fast charge battery in the vehicle. Filling the home fast charging battery in a slow manner over mostly a 23 to 24 hour period.