12V 12F anti-overcharge supercapacitor bank

Use five 2.7V supercapacitors in series. Mall material number C240786

After parallel connection, the capacitance is 13.5V 12F

Use the BW6101 charging protection chip for management to prevent overcharging. And connect an external high-power current expansion transistor to expand the current.

Station B column: https://www.bilibili.com/read/cv6085464

Welding test video: https://www.bilibili.com/video/BV1wK411p7sf/

Please see the attachment for the datasheet of BW6101

Note that this lamp only lights up when the constant voltage fails , so it doesn’t make much sense whether it is soldered or not, or it is no problem to lead it to a short-term leakage of 1A for protection circuits or the like.

Has the following advantages

• Uses a special charging management chip BW6101, which has better reliability (1 yuan each)
• 30uA quiescent current
• High accuracy (±1%)
• Overcharge indication
• Rated 1A leakage capacity (if higher, please replace the bleeder resistor and bleeder transistor)
• 5 yuan to make the board (if you need strips, you can change it yourself)

Manual placement:

Welded board

Test quiescent current @2.4v

I have not purchased a 60F capacitor for the time being. I will use a 7F capacitor first. This board is mainly for testing the protection function. There is no adjustable power supply test for the time being (the laboratory is not open)