Comments • 1 394

  • Pete DiCapua
    Pete DiCapua  4 days back

    2 batteries in parallel yield 4 amps...not 12 amps.

    • OLL13_85
      OLL13_85  1 weeks back

      The question is: why electric cars have to look so ugly?
      The only acceptable is the Tesla Model S, but its way to expensive and i hate the stupid touchscreen controls that it has, even to open the glove box you must use the touch screen....😕

      • Cloud By Day Fire by Night

        That make sence

        • WhatTheFunk
          WhatTheFunk  2 weeks back

          Everyone's like "ChArGiNg eLeCtRiC cArS mAkEs EmIsSiOnS aNyWaY sO wHaTs ThE pOint"
          ...but it doesn't have to be that way...

          • Avi Naidu
            Avi Naidu  2 weeks back

            Damn, Im just gonna be sticking to a ICE engine! screw this electric nerdy stuff!

            • mglmouser
              mglmouser  2 weeks back

              Cocaine much?

              • Rooster Edits
                Rooster Edits  3 weeks back

                Me: thinks about my vape batteries
                Donut: it’s the same battery in vapes!
                Me: oh shit.... *hits vape*

                • Robert Bee
                  Robert Bee  3 weeks back

                  Meth is a hell of a drug.

                  • Levani Otarashvili
                    Levani Otarashvili  4 weeks back

                    with great pwer comes great electricity bills

                    • Shahriar Ahmed
                      Shahriar Ahmed  1 months back

                      First of all, Battery stores electrical energy into its chemical composition. The chemical composition of a battery consists of anode and a cathode which are separated by electrolyte. Suppose a battery's anode and cathode are connected by a circuit externally. Thus completing the circuit. During discharge of electricity, the electrons from the anode travels from the anode to the cathode via the circuit. Basically, this process converts stored chemical energy to electrical energy and that is what generates an electric current.

                      • EDG
                        EDG  1 months back

                        The 18650 isent some magical electric jesus thing it's what made him

                        • Spyros Bellos
                          Spyros Bellos  2 months back

                          4:31 2A + 2A = 12A?

                          • Jsingle1922
                            Jsingle1922  2 months back

                            The work you guys do to educate the public is nothing short of miraculous. I feel like I'm watching SNL, but in the end I'm explaining how batteries chemically store energy to my friends. Thanks for being awesome. You're making the world a better place.

                            • ya boi Gabe Newell
                              ya boi Gabe Newell  2 months back

                              They are so fast because they get extra energy from sucking out all of the life and passion of vehicles

                              • ADHAiiN7
                                ADHAiiN7  1 months back

                                apparently if you’re passionate about electric cars, you dont exist

                            • Stephen Brackin
                              Stephen Brackin  2 months back

                              Electric cars will be carbon-neutral when their electricity comes from fusion in a few years! :-)

                              • Junior Gaytan
                                Junior Gaytan  2 months back

                                I'm using this video for my five page essay and I'm getting so many notes... Thank you Donut, much love

                                • Alex Wenstrup
                                  Alex Wenstrup  2 months back

                                  Love the video! The video was a little confusing about the peak current draw from a cell vs its capacity, so I'd like to clear that up.

                                  You say "on a battery, amps measure capacity" (3:47). Capacity, often measured in milliamp hours, is how long a battery can output a certain amount of current (or how much current it could output if it took an hour to discharge). On most 18650 cells used in electric cars, this number falls between 2000 and 3000 mAh.

                                  The current rating of a battery (the 30 amp figure given at 3:23) doesn't actually dictate how much energy (or capacity) the cell contains; it is a measure of how quickly the cell can output that energy (like you say in the dam analogy). Most 18650 cells, including the ones used in earlier Teslas, are rated for between 20 and 30 amps.

                                  Love the videos, and keep up the good work!

                                  • Slav_kid
                                    Slav_kid  2 months back

                                    like who saw the reference of vape nayshe

                                    • Vojta Nice Shnicle zwei
                                      Vojta Nice Shnicle zwei  2 months back

                                      Did i saw some hagerty redline rebuild over there?

                                      • Diego Martinez
                                        Diego Martinez  3 months back

                                        I am from the netherlands

                                        • ChicksDiggit
                                          ChicksDiggit  3 months back

                                          this guy gives me a headache

                                          • reanimated6
                                            reanimated6  3 months back

                                            ".... IN A SEDAN!" haha

                                            • Barut Tech
                                              Barut Tech  3 months back

                                              alot of mistakes amperage is rate of flow not capacity capacity is ah (ampere hour)

                                              • Serpentine Cars
                                                Serpentine Cars  3 months back

                                                This actually quite interesting

                                                • Stephen Brackin
                                                  Stephen Brackin  3 months back

                                                  Electric cars will be totally green after their electricity comes from fusion in a decade or two. :-)

                                                  • Brandon Miller
                                                    Brandon Miller  3 months back

                                                    I learned more about electrical theory from this video than any of the electricity explained videos I’ve watched before. Thank you, now my series hybrid BAC mono clone is one step closer to creation.

                                                    • Magatsukami San
                                                      Magatsukami San  3 months back

                                                      4:32 you should have written 4A
                                                      Btw GREAT VIDEO

                                                      • sam
                                                        sam  3 months back

                                                        Stop screaming at me, I didn't do anything wrong I just wanna know how they work 😿

                                                        • Hauptmann Joachim Totenkopf

                                                          Alright... You can't be serious. Had to pause the vid at 4:31 ... As an Engineer, this is just insulting. Whos doing the Physics & Calculations here at Donut?? The SERIES Circuit (GREEN Batteries on left) is fine, but the PARALLEL Circuit (PINK Batteries on the right) is supposed to read: "6V 4A" ..... Come on Donut, 2+2 = 4 , not 12!

                                                          (Don't want my future engineers thinking 2 plus 2 is 12 :/ )
                                                          That's prob what happened to Fiskar & is why THEIR cars catch on fire...

                                                          • The Faihriem
                                                            The Faihriem  3 months back

                                                            he is an interesting man

                                                            • Yaseeen Ali
                                                              Yaseeen Ali  4 months back

                                                              SO NAAR GRONINGEN !!!

                                                              • sparrow
                                                                sparrow  4 months back

                                                                Cyote supercharged mustangs are able to do 5 seconds at a quarter mile at this point like God damn a f250 can do 0 to 60 in like 2 seconds like what the fuck

                                                                • Anant Khanna
                                                                  Anant Khanna  4 months back

                                                                  5:39 what's the point of short circuiting the bars?

                                                                  • Brennan Yamamoto
                                                                    Brennan Yamamoto  4 months back

                                                                    Your battery explanation is incorrect. Other people in the comments are trying to correct you, but they're also getting it sort of wrong. I'm not a specialist in battery technology, but I do have a masters degree in engineering, so maybe that means I know something. But I'm just a random guy on the internet, so please double check me if you're suspicious of my explanation.

                                                                    First, the nominal voltage of a single, cobalt-based lithium ion battery is 3.6V to 3.8V depending on the manufacturer, not 4.2V. It is true that the cell is 4.2V when it is fully charged, but when we rate the voltage of batteries, we rate them based on their nominal voltage; we never rate them based on their fully charged voltage. As an example, your 12V lead acid car battery is actually more like 13.5V when it's fully charged, and somewhere around 10V when we consider the battery "dead". A lithium ion battery cell is around 4.2V when it's fully charged, and around 3.0V when we consider it fully discharged (lithium ion batteries with protection circuits will generally kick in around 2.7V to 2.8V to protect the battery from damage due to undervolting). So yes, in a way, a lithium ion cell is 4.2V if you take a voltmeter and measure its open circuit voltage when it's fully charged, but this is not a realistic measure of voltage under operation, so we rate batteries based on their nominal voltage instead.

                                                                    Second, as people are pointing out, you're going back and forth between calling amperage "current" and "capacity"; they are not the same thing. Amperage [A] measure of electric current, it has nothing to do with the energy capacity of the battery. The fundamental unit of energy (or energy capacity) is joules [J]; this is how energy capacity should be measured, but because engineers and scientists often like to make things extra confusing, when we talk about batteries, we often measure energy in watt-hours [Wh] (or kilowatt-hours [kWh] when the number gets large). To make things even more confusing, some idiots a long time ago decided they wanted to take a shortcut and start rating energy capacity by amp-hours [A*h] instead of watt-hours. Amp-hours is not technically a measure of energy capacity, but it is linearly proportional to energy capacity since voltage [V] times current [A] gives you power [W]; so one could say that amp-hours is a energy capacity rating, rather than an actual measure of energy capacity. As long as you are comparing two batteries with the same rated voltage, you can compare their capacities by looking at the amp-hour rating; if not, then no bueno. As an example, a 12V battery with a 4 Ah capacity rating has half the energy capacity as a 24V battery with a 4 Ah rating. The 12V, 4 Ah battery has 48 Wh of true energy capacity, whereas the 24V, 4 Ah battery has 96 Wh of true energy capacity; but you could be tricked into thinking that the two batteries had the same energy capacity if you just looked at the Ah rating (this is why this system is idiotic).

                                                                    Therefore, when you wire two identical batteries in series, you double their voltage, but the maximum potential current draw remains the same. When you wire two identical batteries in parallel, you double their maximum potential current draw, but the voltage remains the same. In both cases, the energy capacity doubles (you now have two batteries, and therefore, twice the amount of energy capacity). The voltage and current dictate exactly how you're allowed to transfer energy from those batteries in the system down the line.

                                                                    To recap: Voltage [V] is a measure of electric potential. Current (in amps [A]) is a measure of electric current. Joules [J] is a measure of energy (or energy capacity). Watts [W] is a measure of power; like horsepower [hp] or kilowatts (for our metric friends) in a car engine, power is a measure of the rate of energy transfer (it is equivalent to joules per second [J/s]). Often times, we measure energy capacity in terms of watt-hours [Wh] instead of Joules [J], both are mathematically correct methods of measuring energy capacity, but obviously have different values. Sometimes, we __rate__ energy capacity using amp-hours [Ah] instead of watt-hours or joules; as long as the voltage of the batteries you're comparing are the same, then you can compare capacity based on their amp-hour rating.

                                                                    • Sarang Jani
                                                                      Sarang Jani  4 months back

                                                                      In this video he talked about a premium EV car like Tesla, where in normal EV car they uses BLDC motor instate of Induction motor.

                                                                      • Guenter Lohnert
                                                                        Guenter Lohnert  4 months back

                                                                        Why is he squealing like a stuck pig? Has a huge e-car battery just dropped on his foot?

                                                                        • Tyler Lyssy
                                                                          Tyler Lyssy  4 months back

                                                                          @4:30 doubling the amperage would equal 4amps. Not 12.

                                                                          • colinmoriarty
                                                                            colinmoriarty  4 months back

                                                                            Tesla is a big vape confirmed

                                                                            • Flavio Castillo
                                                                              Flavio Castillo  4 months back

                                                                              I'm learning more here than in my univ lmao

                                                                              • Branden Rubenstein
                                                                                Branden Rubenstein  4 months back

                                                                                I'm sure I'm going to get shit for this.......but recent studies have found that electric cars are worse for the carbon footprint they leave than new has vehicles. I enjoyed this episode, I loved the information up until the claim they are less harmful overall than gas.

                                                                                • Dan Vercruysse
                                                                                  Dan Vercruysse  4 months back

                                                                                  What's the future of mechanics? Do you think they will begin making less or more money? Do you think much more schooling is needed?

                                                                                  • star man
                                                                                    star man  4 months back

                                                                                    Somebody needs to put tesla tech in a model t 😂😂😂😵

                                                                                    • Dark Eve
                                                                                      Dark Eve  5 months back

                                                                                      Hi um I’m really curious as to why the electric cars are so quiet, when I think of an electric motor I think of that really nice sound a lot of our electrical motors and all make when they are turned on and the mechanism slowly starts up and then gets faster and faster until it finally reaches its max speed and just stays making the same noise till the mechanism begins to slows down from you turning the machine off.

                                                                                      • Silent Champion Knight Rider

                                                                                        That last part is inaccurate. Because of the shorter span of time where the carbons are produced in the production of electric motors, they are actually more damaging to the atmosphere than a 13 mpg car from the 70s. Think hitting your finger with a hammer. A gasoline powered car is like the occasional bump when you miss the nail - you can walk it off as fast as it happened. Electric cars are like using a sledgehammer for the same job - your fingers are likely broken.

                                                                                        • Mene Gene
                                                                                          Mene Gene  5 months back

                                                                                          This guy’s neck is making mine feel uncomfortable

                                                                                          • Dave Chavez
                                                                                            Dave Chavez  5 months back

                                                                                            I learned more about voltage from this than my AP physics class

                                                                                            • Pedro Consoli
                                                                                              Pedro Consoli  5 months back


                                                                                              • Steilkurbler
                                                                                                Steilkurbler  5 months back

                                                                                                Dude Amps are the current. The capacity is Amp hour hence Ah.