capacitor balance charging???

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Rangwan
    Member
    • May 2012
    • 14
    • Thailand

    #1

    capacitor balance charging???

    The electronic theory says "connecting capacitor in series will give the higher voltage tolerance, but lower capacitance in the same fashion of connecting resistor in the parallel will give higher power tolerance but lower resistance".

    However, I've got some idea of "balance charging". Giving 3 capacitors of 1F @4.3V each connected in series with 4 pins like

    G|____c1_____|______c2______|______c3_____|+ and charge them like li-po battery. I'm wondered if that will result in 1F capacitor @ 12.6V with no capacitor boomed?
  • 999999999
    Badcaps Veteran
    • Sep 2006
    • 774
    • USA

    #2
    Re: capacitor balance charging???

    First of all, LiPo batteries should not be charged past 4.2V. If you were to connect 3 x Li-Po batteries in series then yes you can charge the 3 capacitor series to 12.6V but you will not have 1F @ 12.6V, it will be 333mF ( 333,33uF ) at 12.6V.

    Unless you use a (large) high current battery, you should use something like a resistor in series to limit current from the battery while charging the capacitors.

    Comment

    • Tube_Dude
      Senior Member
      • Feb 2011
      • 51

      #3
      Re: capacitor balance charging???

      Originally posted by 999999999
      If you were to connect 3 x Li-Po batteries in series then yes you can charge the 3 capacitor series to 12.6V but you will not have 1F @ 12.6V, it will be 333mF ( 333,33uF ) at 12.6V.
      The resulting capacity of the 3 capacitors will be 333mF or 333.333,33 uF...
      Last edited by Tube_Dude; 05-26-2012, 01:20 PM.

      Comment

      • 999999999
        Badcaps Veteran
        • Sep 2006
        • 774
        • USA

        #4
        Re: capacitor balance charging???

        ^ Huh, yeah I mistyped that or something.

        Comment

        Related Topics

        Collapse

        • MORETTIGIAN
          Capacitor detached from PCB – RTX 2070 Super Founders Edition
          by MORETTIGIAN
          Title:
          Capacitor detached from PCB – RTX 2070 Super Founders Edition

          Description:
          During maintenance on an RTX 2070 SUPER Founders Edition, I found a capacitor lying on my desk after reassembly.
          I did not notice it detaching, so I am unsure of its original location on the PCB.

          Procedure performed:
          - Removed backplate
          - Cleaned heatsink and PCB with isopropyl alcohol + soft ESD brush
          - Reapplied thermal compound
          - Reassembled card

          Observed behavior after reassembly:
          - GPU powers on and operates normally under...
          09-18-2025, 12:14 PM
        • chth96
          desoldered capacitor is self charging until 0.6 voltage.
          by chth96
          I have an 21 inch CRT TV which is not able to power on.
          I disassembled 21 inch CRT TV and measured voltage of main filter capacitor(Samhwa HC 400WV 220uF) in the circuit.
          It shows 270V on my DMM.

          So I discharged this main filter capactior completely and detached circuit board from cathode-ray tube.
          Then I desoldered this main filter capacitor from circuit board.
          But I noticed that this desoldered large capacitor(Samhwa HC 400WV 220uF) is slowly charged by itself until it reached 0.6V

          I measured its ESR value with MESR-100 and it shows 0.1 ohm,judging...
          03-28-2024, 08:56 AM
        • coasterghost
          Lenovo T14 Gen 2 Type 20XK Model 20XK0069US Odd Charging Issues
          by coasterghost
          For Badcaps Readers, Please note that I am hopefully going to present this same message to Lenovo to see if they have any insight to the matter as well and figured to share the entirety here for clarification. The System is out of warranty as it is but does have the option to have it extended.

          Model Information: T14 Gen 2 (Type 20XK, 20XL) Laptop (ThinkPad) - Type 20XK - Model 20XK0069US
          Board: T14 Gen 2 (Type 20XK, 20XL) - Type 20XK.

          System Hardware:
          Processor: AMD Ryzen 7 PRO 5850U
          Memory: 1x 16GB DDR4 3200 (Soldered on Board); 1x Crucial 32GB DDR4...
          09-08-2025, 10:46 PM
        • Thomasraud
          Dell Vostro 3550 (v A01 with BQ24707) Plugged in, Not Charging
          by Thomasraud
          Hello,


          i have similar problem as https://www.badcaps.net/forum/showthread.php?t=37828
          QUOTED
          -It works on charger (without battery connected-only charger)
          -It works on battery (without charger connected-only battery)
          -& it also works when plugged in battery & charger, but it's not charging the battery

          //Confirming, i have same issue, but problem started from charger, centre PIN is outputing 10V+ and jumping randomly 19V


          and..


          QUOTE
          The IC cannot maintain the input current level
          ...
          06-28-2022, 06:47 PM
        • Prolog
          RTX 3080 FE Identifying capacitor
          by Prolog
          Hi people, I hope this is the correct spot to post this, I'm new to the forum.

          I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.

          I hope these photos make it clear which component I am referring to:
          (yes, the soldering is a bit botched from removing the blown one, I know)

          I have found the board schematic (attached), but there does not seem to be a boardview available. I have never...
          12-01-2024, 08:27 PM
        • Loading...
        • No more items.
        Working...