4x 18650 Charging Station w/ 5v1a Single Cell Lipo Chargers by memisis

Last crawled date: 3 years ago

Summary
This is a 4 bay 18650 charging station that allows the user to check the voltage of each battery cell when power to the charging unit is off.
Parts Needed
(4x) 4v1a Single cell lipo chargers https://www.amazon.com/gp/product/B071RG4YWM/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
(4x) Batter case (to obtain -spring and +terminal with wires) https://www.amazon.com/gp/product/B013DUOJV4/ref=oh_aui_detailpage_o05_s01?ie=UTF8&psc=1
(4x) Momentary Switch Buttons https://www.amazon.com/WGCD-Momentary-Button-Switch-Thread/dp/B06XFWVFR9/ref=sr_1_38?ie=UTF8&qid=1520473695&sr=8-38&keywords=momentary+push+button+switch
(1x) Voltmeter https://www.amazon.com/gp/product/B00YALV0NG/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
(10x) M2x6mm Screws
(8x) M2 Nut
Double sided foam tape
26guage silicon wire
Power terminal (I used an XT60)
Possible Parts
Voltage Step-down https://www.amazon.com/gp/product/B071CWMRYD/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
Toggle Switch https://www.amazon.com/Gikfun-MTS102-Position-Toggle-Arduino/dp/B01BWL7Z44/ref=sr_1_40?ie=UTF8&qid=1520475369&sr=8-40&keywords=toggle+switch
Instructions
Remove the -spring and + terminal from the batter cases
Attatch the -spring and + terminal to the 18650 battery bays
Run the wires into the charging module bay
Run two (2) sets of -&+ wires from the buttons bay into each charging bay
Solder the -spring and + terminal AND one set of -&+ wires from the buttons bay to the BATT -&+ respectively
Solder the remaining pair of -&+ wires to the 5v source on the charging modules
Solder all - wires from the BATT -, AND solder the - from the voltmeter, AND the 5v source - together
Solder the source + to the + source for the charging modules
Solder each BATT + to one side of the push button
Solder the other side of the push buttons AND the + and White cables from voltmeter together
Solder toggle switch to - 5v source to break the circuit via toggle switch if desired
Use double-sided foam tape to affix the charging modules to the printed standoffs
Notes:
Make sure to have a PS that is able to supply 4 amps at 5v. I opted to use a step down with a 24vPS to get to 5v. The part is listed above and is working well with a powered onboard fan. This is thing XXXX.
The user can obtain voltages from each cell by powering off the unit and pressing the buttons one at a time. Pressing more than one button gives you the voltage of both batteries. Pressing the button while the until is powered gives you a powered voltage from the charger.
Hope you enjoy! This was a fun project for me.