Quick Charging Technology For Car Battery

No.

The sodium-sulphur battery is an excellent candidate for vehicle energy storage, once its starting temperature of 300-350degC has been reached...

What are you thinking that the lead acid batteries will do that lithium batteries won't do?

Lead acid batteries can't be instantly charged either. You could perform a quick electrolyte change (flooded cells) but the storage and handling would be accompanied by a fair bit of grief.

Some have proposed quick change, not charge, battery cassette systems but this introduces some design and space efficiency drawbacks....

Battery (electrical energy storage) technology is the hardest nut to crack in the EV world.

Assuming that the batteries could absorb the energy in a short time, the equivalent amount of power (energy transfer) of filling your gas tank in the 2-3 minutes it takes would be measured in megawatts (think thousands of volts times thousands of amps).

Yes Dear,

The charging time of a battery is not only dependent on voltage & current only but also on the electrode area and type of battery being charged. More over, we use the same size of electrode for charge & discharge which restricts charging rate. It is like filling a large water storage tank with a small pump which is used to supply water to a household.

The real challenge is to develop a device to overcome this problem and only we can charge a battery in reasonable time.

According to Wikipedia, a gallon of gasoline is equivalent to 33.41 KWH of energy. Assume that you could charge up in about 8 minutes (480 seconds) which is somewhat longer than it takes to fill up, but not overly inconvenient. 33.41 KWH = 33410 x 3600 Watt seconds. Assume the gasoline engine is only 20% efficient and the batteries/electric motor is 100% efficient.

A gallon of gasoline works out to about 120,000,000 Watt seconds. Multiply by 20 (gallons) and divide by 5 (20% efficiency) gives 480,000,000 Watt seconds of energy to charge up. Divide by 480 seconds gives power required of 1 MW for 8 minutes. Think of a dozen cars at a charging station, each drawing 1 megawatt of power for 8 minutes each. Even given batteries that could be charged that quickly, I don't see how that much power could be drawn from the grid.

What happened to NiFe bateries? they had fast charge/discharge capability, but you never hear about them anymore......

Massive improvements to the power grid and maybe a doubling of the generation capacity are needed before widespread use of electric cars can be possible. Even if the charge times are not improved the total amount of power needed to run an entirely electric fleet totally exceeds todays capability

NiFe a.k.a. Edison cells a.k.a. "railroad batteries" have certain advantages, unfortunately energy density is not one of them. Therefore they are not suitable for modern automobiles. Jay Leno's car is not really practical by today's standards.

They might be o.k. for an off grid situation, but again you will need a lot of them and a lot of room.

Ni-Fe battery is one of the most uncomplicated battery as compared to Lead-Acid battery which has many disadvantages. However, its energy density is major hurdle in its use. Most useful battery could had been Air-Iron battery and Zinc-Chlorine battery which has shown lots of promise but failed in commercial production. Perhaps some new type of battery may be needed to power the Electric Vehicles.

Unfortunately, there is no method presently available to do what you seek. The "holy grail" of EV's is the super (or ultra) capacitor, a device which can store large amounts of energy, rapidly charge and discharge, and do so repeatedly with no little or degradation in performance.

Many companies have claimed to have finally solved the riddle. Some were simple errors in basic science, while others were outright fraud. The most recent example of promise without delivery is eeStor. This is what they promised, yet they delivered nothing.

The best designs at this time don't have the energy density necessary for EV usage, but research continues and incremental improvements are being achieved. The most promising technologies use innovative forms of carbon.

Can you remember the wild west where travellers change horses when the horses are tired also racing cars change tyres in less than a minute. Do the same thing for EV-change batteries in charging stations.

We still are not thinking outside the box. Stop trying to place the fuel inside vehicle. We already know how to build vehicles propelled by energy stored outside the vehicle as in electric trolley cars and trains or even boats. What we need to do is develop this technology to facilitate bringing it to a street near you. Then you would only need to carry enough energy to move vehicle in and out of parking spots and garages. Think inductive not conductive energy transfer. We alreadey have mag-lev trains. Now we need to perfect this in cars.

Dear Gentleman,

We are not talking about trams & trains which run on predefined paths. If we make a car run by wires buried under roads it will run only on pre-designated paths. Them what about off-roaders & cross country travel? What about the truck & transport? The fuel or energy has to be carried inside the vehicle only. Please think out of box for a new charging technology for rechargeable battery.

The truck transport industry has very highly pre-defined routes. A friend wanted to relocate a business to another town. One suggestion after another was rejected because it was not on one of the routes used by the trucking companies. The safety people want cars that do not require drivers because they feel elimination of driver error will greatly minimize acidents.

Off-road and cross country driving? Specialized applications. Eliminate mass transportation will leave plenty of diesel or other petro fuel for this minority group.

You asked about truck and transport. I know truck drivers who reject long range tanks because of weight. There is nothing these guys would like more than getting rid of any weight related to propolsion or fuel. They are paid ton/mile so every pound they can remove from fuel system means extra paying cargo. They would love it if they did not have any fuel on board.

Seattle already has hybrid busses that run on tramways when available and diesel when nothing is available.

Evidently I am not the only one to think in this direction.

http://www.gizmag.com/stanford-wireless-ev-charging/21321/

There must be some merit to the idea if Stanford is spending effort on the concept.

This is another version of electric locomotive or a tramcar which were fed by overhead power lines running along the route but without contact(wireless).

Do you have something against public transit or the general concept of powering vehicles externally?