Electric Car Trivia
May 16, 2022 06:45:45 #
I got this from a YouTube guy last night.
Except for Tesla, every EV uses the same type of connection to charge. Since Tesla developed theirs first, theirs is different. They said that they will switch to the universal type. This will allow Tesla cars to use any charging station, and it will also allow other EVs to use Tesla's.
EV makers are heading toward 800 and 900-volt systems for a number of beneficial reasons.
Fast chargers are becoming more popular - like ten minutes to charge completely. Although this is fast, it's not necessarily good for the battery pack.
The fast chargers - CCS - can deliver up to 1,000 amps through the cable. This might seem like a lot for a 2" cable, but it is liquid cooled. Coolant runs through the cable and back to a radiator in the charging unit.
These two guys drove from somewhere up north to FL, and they spent a little over an hour charging the Hyundai they were driving. They said it was nice taking a short break every few hours.
I'm not promoting electric cars - just mentioning some interesting facts.
Except for Tesla, every EV uses the same type of connection to charge. Since Tesla developed theirs first, theirs is different. They said that they will switch to the universal type. This will allow Tesla cars to use any charging station, and it will also allow other EVs to use Tesla's.
EV makers are heading toward 800 and 900-volt systems for a number of beneficial reasons.
Fast chargers are becoming more popular - like ten minutes to charge completely. Although this is fast, it's not necessarily good for the battery pack.
The fast chargers - CCS - can deliver up to 1,000 amps through the cable. This might seem like a lot for a 2" cable, but it is liquid cooled. Coolant runs through the cable and back to a radiator in the charging unit.
These two guys drove from somewhere up north to FL, and they spent a little over an hour charging the Hyundai they were driving. They said it was nice taking a short break every few hours.
I'm not promoting electric cars - just mentioning some interesting facts.
May 16, 2022 07:18:08 #
Actually I would have electric car if I am rich. On average electric cars are more expensive than gas powered cars. To better use the electric car one needs to own a home with space for charger. Always charging your car at a charging station is a pain.
May 16, 2022 08:01:02 #
jerryc41 wrote:
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The fast chargers - CCS - can deliver up to 1,000 amps through the cable. This might seem like a lot for a 2" cable, but it is liquid cooled. Coolant runs through the cable and back to a radiator in the charging unit.
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The fast chargers - CCS - can deliver up to 1,000 amps through the cable. This might seem like a lot for a 2" cable, but it is liquid cooled. Coolant runs through the cable and back to a radiator in the charging unit.
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The average toaster draws 10 amps at 120 volts = 1200 watts.
Figure the car charging voltage x 1,000 amps = watts used to charge.
IF the system is a 12 volt system, (alternators put out about 14 volts) that's
14v x 1,000a= 4,000 watts. So the line draw would be 4,000w / 120v = 33 amps.
No imagine a bunch of neighborhoods all charging cars at the same time.
THAT would be a lot of added power drain on the infrastructure.
May 16, 2022 08:21:09 #
13
Loc: I am only responsible to what I say..not what
What a farse... If everyone had an electric car it would tax the power grid to the point of failure. Those cars would not work in northern states in the winter. Just my 2-cent worth. :}
May 16, 2022 09:20:15 #
Longshadow wrote:
The average toaster draws 10 amps at 120 volts = 1200 watts.
Figure the car charging voltage x 1,000 amps = watts used to charge.
IF the system is a 12 volt system, (alternators put out about 14 volts) that's
14v x 1,000a= 4,000 watts. So the line draw would be 4,000w / 120v = 33 amps.
No imagine a bunch of neighborhoods all charging cars at the same time.
THAT would be a lot of added power drain on the infrastructure.
Figure the car charging voltage x 1,000 amps = watts used to charge.
IF the system is a 12 volt system, (alternators put out about 14 volts) that's
14v x 1,000a= 4,000 watts. So the line draw would be 4,000w / 120v = 33 amps.
No imagine a bunch of neighborhoods all charging cars at the same time.
THAT would be a lot of added power drain on the infrastructure.
Not a big deal, just mine more coal...
May 16, 2022 09:22:35 #
BigDaddy wrote:
Not a big deal, just mine more coal...
Build more power stations also.....
May 16, 2022 10:14:21 #
13 wrote:
What a farse... If everyone had an electric car it would tax the power grid to the point of failure. Those cars would not work in northern states in the winter. Just my 2-cent worth. :}
Hate to be stuck in traffic with a low battery in the winter with the heater going full blast to stave off frost bite in an EV.
Or worse, stuck in a 4' snow storm in say Buffalo NY, with 60 mph wind, 0° F and help sure to come by tomorrow... if your lucky.
Of course, if the Govt wants to buy me a Tesla, I'll take it.
May 16, 2022 10:39:01 #
BigDaddy wrote:
Hate to be stuck in traffic with a low battery in the winter with the heater going full blast to stave off frost bite in an EV.
Or worse, stuck in a 4' snow storm in say Buffalo NY, with 60 mph wind, 0° F and help sure to come by tomorrow... if your lucky.
Of course, if the Govt wants to buy me a Tesla, I'll take it.
Or worse, stuck in a 4' snow storm in say Buffalo NY, with 60 mph wind, 0° F and help sure to come by tomorrow... if your lucky.
Of course, if the Govt wants to buy me a Tesla, I'll take it.
Or the AC on in the summer. You could travel with a little Honda generator.
May 16, 2022 13:49:05 #
Longshadow wrote:
The average toaster draws 10 amps at 120 volts = 1200 watts.
Figure the car charging voltage x 1,000 amps = watts used to charge.
IF the system is a 12 volt system, (alternators put out about 14 volts) that's
14v x 1,000a= 4,000 watts. So the line draw would be 4,000w / 120v = 33 amps.
No imagine a bunch of neighborhoods all charging cars at the same time.
THAT would be a lot of added power drain on the infrastructure.
Figure the car charging voltage x 1,000 amps = watts used to charge.
IF the system is a 12 volt system, (alternators put out about 14 volts) that's
14v x 1,000a= 4,000 watts. So the line draw would be 4,000w / 120v = 33 amps.
No imagine a bunch of neighborhoods all charging cars at the same time.
THAT would be a lot of added power drain on the infrastructure.
That's 1000A at 800V not 12V. Electric cars have high voltage batery. Normally it's 480V or so.
May 16, 2022 13:50:52 #
BebuLamar wrote:
That's 1000A at 800V not 12V. Electric cars have high voltage battery. Normally it's 480V or so.
WOW!
That's 800 Kw!
May 16, 2022 16:08:25 #
Longshadow wrote:
WOW!
That's 800 Kw!
That's 800 Kw!
Jerry said it can charge fully in 10 minutes. So it's 800kWh if you charge for 1 hour. For 10 minutes it's 133kWh. The Tesla battery hold 70 to 90kWh of charge. It seems about right.
May 16, 2022 17:48:44 #
BebuLamar wrote:
Jerry said it can charge fully in 10 minutes. So it's 800kWh if you charge for 1 hour. For 10 minutes it's 133kWh. The Tesla battery hold 70 to 90kWh of charge. It seems about right.
The charge rate (coulombs at any given instant) is not time dependent.
Be careful how you mix power and KWH. KWH is a product of power over a time period.
1,000amps at 800V is 800KW, not KWH. If it charges at that rate for one hour it is 800KWH.
A 100 watt bulb draws 100 watts, regardless of time on.
The length of time it is on yields KWH (used) - KWH=Power x Time. A 100 watt bulb on for one hour uses .1KWH
A bulb on for 10 minutes still draws 100 watts during the ten minutes, but it uses .0166 KWH.
The Tesla battery hold 70 to 90KW of charge, power. It does not hold KWH, it holds a total charge, but it can be rated at being able to supply a certain amount of charge for a certain amount of time.
Use less charge than the rating and the charge will last a longer time. Use more charge than the rating and it will last less.
Basically (ideally in a perfect system),
A 500 AmpHour battery can supply 500 amps for one hour.
It can supply 1000 amps for 1/2 hour.
It can supply 250 amps for 2 hours.
May 16, 2022 19:01:52 #
Longshadow wrote:
The charge rate (coulombs at any given instant) is... (show quote)
Yes the charge rate is 800kw but for 10 minute it's 133kwh.
The battery capacity is rated kwh not kw. Most battery are rated in AH but it's more correctly WH.
May 16, 2022 19:14:37 #
jerryc41 wrote:
...The fast chargers - CCS - can deliver up to 1,000 amps through the cable. This might seem like a lot for a 2" cable, but it is liquid cooled. Coolant runs through the cable and back to a radiator in the charging unit...
How do you cool the cables in the car from the charging port to the batteries? The current doesn't change once it goes through the connector unless the connector is dissipating a lot of power. In that situation, the batteries are not getting the fast charge.
May 16, 2022 19:17:42 #
BebuLamar wrote:
Yes the charge rate is 800kw but for 10 minute it's 133kwh.
The battery capacity is rated kwh not kw. Most battery are rated in AH but it's more correctly WH.
The battery capacity is rated kwh not kw. Most battery are rated in AH but it's more correctly WH.
AH and WH are equivalent as long as the voltage is the same.
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