18.5V Li-Ion Battery Charger with TL431 (short)

Just the charger circuit operation. Works for 12V batteries as well.
www.bristolwatch.com/ccs/lith...

[@romancharak3675]

A link to the balance circuits would be appreciated, as all the circuits I saw for sale were for multiple batteries. Thank you for sharing your circuit experiments.

[@LewisLoflin]

They are all over Ebay. That is where I got mine.

[@LewisLoflin]

Go to Ebay in search and enter "2S BMS PCB Protection Board for 2 Packs 18650". Here is one link to the ones I used.
www.ebay.com/itm/403649606461

[@LewisLoflin]

www.bristolwatch.com/ccs/TL431A.htm Experiments with TL431 Shunt Regulator
www.bristolwatch.com/ccs/TL431A2.htm TL431A Precision Current Regulator Circuits
www.bristolwatch.com/ccs/TL431A3.htm TL431A Based Current Limiter Constant Current Source Circuits
www.bristolwatch.com/ccs/TL431A4.htm TL431A Shunt Regulator Circuits
www.bristolwatch.com/ccs/lithium_charger.htm TL431A Lithium-Ion Cell Charging Circuits
www.bristolwatch.com/ccs/lithium_charger2.htm Charging Multi-Cell Lithium-Ion Battery Packs
www.bristolwatch.com/ccs/tl431_ccs1.htm TL431 Over-Voltage, Under-Voltage Detector Circuits
www.bristolwatch.com/ccs/tl431_ccs2.htm TL431A Constant Current Source Working Circuits Demo
CZcams:
czcams.com/video/kJUit6XQYKE/video.html TL431A Lithium-Ion Cell Charging Circuits
czcams.com/video/jVXmL7HThiM/video.html TL431 Battery Charger Circuit Calculations Revised
czcams.com/video/Fr0Zir8UCLs/video.html TL431 10-Volt Charger Short Version
czcams.com/video/gg0Tux_pAgk/video.html Charging, Charge-Balancing 18V Li-Ion Battery with TL431
www.bristolwatch.com/ele4/ccs_lm358.htm Arduino Measures Current from Constant Current Source
www.bristolwatch.com/ele4/css.htm Constant Current Source Theory Testing
www.bristolwatch.com/ele4/ard_css.htm Arduino Controlled Power Constant Current Source