Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

[SOLVED] charging super caps with power supply

Status
Not open for further replies.
Z

Zak28

Advanced Member level 2
Advanced Member level 2
Joined
Aug 19, 2016
Messages
579
Helped
6
Reputation
12
Reaction score
6
Trophy points
18
Visit site
Activity points
4,681
I have a bunch of 2.7v 500f super caps and a 12v 50A power supply. Isn't it safe to charge 5 caps serially @ 12v? Or do super caps have special quirks preventing this? I would use a dc speed pwm controller to limit current to prevent shorting the power supply blowing the fuse.
 

A stack of identical resistors is advised so that all capacitors take equal shares of supply voltage. For an ohm value try 500 or 1000.
Expect 10 minutes to reach a charge above 11 V.
 
  • Like
Reactions: Zak28

    Z

    Zak28

    Points: 2
    Helpful Answer Positive Rating
Im just going to charge the 2.7v caps individually to 2.6v thru a fet using a 12v 50a supply which will shutoff immediately at 2.6v using a zener as reference. I can even charge them parallel in the same fashion but will result in unequal voltage but its not substantial if I short them and discharge them prior to charging. This method is far superior to serial charging.
 

You'll connect supercaps (or batteries) in series if you want higher output voltage. Charging will normally take place in the same configuration as discharge.

If your supercap module or battery uses series connection, a charge balancing circuit is required. For reasonable charging efficiency, a switched mode converter may be needed in addition.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top