Hello Smart people,
my objective is very simple, to connect 3x 14500 3.7v lithium batteries in parallel and charge them with this module:
https://www.aliexpress.com/item/1005004957459719.html?spm=a2g0o.order_list.order_list_main.38.44211802hKnngk#nav-specification
I have two questions:
1 - Would I need a BMS?
2 - In the product's description they reference two pads that should be shorted if your batteries don't have discharge protection (or is the other way around?) I can't really understand the english. Would someone be able to understand what should be done in which situation?
Here's the description
Instructions for use
Output voltage adjustment potentiometer
VO+VO. IN-IN+
output input
LX-LCBST
VO+ Vo B+ B- T point
battery output battery
The module supports type-c interface input and solder joint input of back annotation input. You can choose one, the recommended voltage is about 5V. The module is marked with two outputs. The two outputs are the same, and the lines are connected in parallel. You can choose one of them. The following focuses on connecting the battery.
If your battery comes with its own protection board, you can choose our package without discharge protection. After the battery is connected to B+ and B-, you must short the T point to charge and discharge.
If your battery does not have a protection board, choose a package with discharge protection. This is very important, because over-discharge of the battery is likely to cause the battery to be scrapped. Most of similar competitive products do not have discharge protection. After -, the T point cannot be shorted, otherwise the discharge protection will be invalid.
After connecting the wires, you can use a screwdriver to adjust the output voltage you want.
The battery chooses 3.7V lithium battery, and the full voltage is 42V. The battery type can be 18650 polymer and other batteries.
Thanks for your help
