speaking of car battery chargers...

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  • eccerr0r
    Solder Sloth
    • Nov 2012
    • 8696
    • USA

    #1

    speaking of car battery chargers...

    I suspect someday these car battery chargers will become as obsolete as vacuum tubes (since everyone would be driving electric cars that require power inputs rated in the kilowatts), but for now they still have their use.

    Traditionally chargers are big heavy transformers with diodes...a fairly dumb device. I still have one. However I suspect, just like wall warts, people are all switching to... lightweight switching power supplies.

    I recall seeing at WallyWorld they no longer have a line frequency transformer battery charger, and all were SMPS supplies now... are anyone still selling old fashioned transformer chargers?

    How about those starter/charger "50A 100A 200A" supplies designed to boost starting as well?
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30978
    • Albion

    #2
    Re: speaking of car battery chargers...

    they wont be obsolete because 12v batteries are also used on generators, plant equipment such as compressors etc and loads of other stuff.

    Comment

    • diif
      Badcaps Legend
      • Feb 2014
      • 6978
      • England

      #3
      Re: speaking of car battery chargers...

      I have one of the lithium jump packs. Powerful enough to start a completely dead 3L V6 Touareg. It also has USB and adjustable voltages for charging/powering a laptop.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: speaking of car battery chargers...

        Even elecric cars have 12v lead acid batteries.
        https://www.plugincars.com/why-do-el...er-129118.html

        Even TESLA uses lead acid batteries :
        https://forums.tesla.com/forum/forum...ithout-warning
        https://forums.tesla.com/forum/forum...r-start-my-car
        Last edited by budm; 02-14-2020, 04:01 PM.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • eccerr0r
          Solder Sloth
          • Nov 2012
          • 8696
          • USA

          #5
          Re: speaking of car battery chargers...

          Originally posted by budm
          Even elecric cars have 12v lead acid batteries.
          Don't tell me these aren't charged by the main pack...

          Comment

          • eccerr0r
            Solder Sloth
            • Nov 2012
            • 8696
            • USA

            #6
            Re: speaking of car battery chargers...

            Originally posted by stj
            they wont be obsolete because 12v batteries are also used on generators, plant equipment such as compressors etc and loads of other stuff.
            But are they all SMPS now?

            Comment

            • sam_sam_sam
              Badcaps Legend
              • Jul 2011
              • 6033
              • USA

              #7
              Re: speaking of car battery chargers...

              The ones I seen that have no real weight to them are for sure a SMPS board

              Comment

              • Curious.George
                Badcaps Legend
                • Nov 2011
                • 2305
                • Unknown

                #8
                Re: speaking of car battery chargers...

                Originally posted by budm
                Even elecric cars have 12v lead acid batteries.
                For some years, now, there has been a push to move to 48V systems in cars -- mainly to cut down on wire gauge (without also needing dramatically costlier semiconductors). Imagine the turbocharger being electrically driven (instead of off the camshaft).

                Though I still think they plan on retaining a 12V bus for things like interior lighting, instrumentation, etc.

                Comment

                • petehall347
                  Badcaps Legend
                  • Jan 2015
                  • 4426
                  • United Kingdom

                  #9
                  Re: speaking of car battery chargers...

                  Originally posted by Curious.George
                  For some years, now, there has been a push to move to 48V systems in cars -- mainly to cut down on wire gauge (without also needing dramatically costlier semiconductors). Imagine the turbocharger being electrically driven (instead of off the camshaft).

                  Though I still think they plan on retaining a 12V bus for things like interior lighting, instrumentation, etc.
                  turbo runs off exhaust gases

                  Comment

                  • Curious.George
                    Badcaps Legend
                    • Nov 2011
                    • 2305
                    • Unknown

                    #10
                    Re: speaking of car battery chargers...

                    Originally posted by petehall347
                    turbo runs off exhaust gases
                    Depends on the design of the turbocharger.

                    A friend makes them (after-market) in his tool-and-die shop gearing up off the crankshaft so he can get it up to speed at relatively low RPMs (you have power despite revs). And, easy to retrofit to almost any vehicle.

                    The advantage of an *electric* turbocharger is you can get it up to speed before the engine is doing anything!

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30978
                      • Albion

                      #11
                      Re: speaking of car battery chargers...

                      https://www.youtube.com/watch?v=7a_J2X88fSE
                      there;s one

                      Comment

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