![lipo battery monitor circuit lipo battery monitor circuit](https://3.bp.blogspot.com/-hiDoC7VQO7M/VeP77KIOH8I/AAAAAAAAK-I/G29Zs9tsg8E/s1600/lipo%2Bcharger%2Bcircuit.png)
Now, if you have appropriate LiPo charger which has all of it already built in (and these days, they do), then monitoring battery voltage won't tell you if battery is charged or not. When current drops to, let's say 10mA, then battery is pronounced charged. In second stage voltage is kept constant while current is monitored. When battery voltage reaches 4.2V per cell, second stage is applied. In first stage, constant current (current is limited!) is applied allowing battery voltage to go from current state to 4.2V per cell. so if you want to have an accurate indication of the battery state during the charge you will need to disconnect the charge power measure the battery voltage and then continue charging if applicable.Ĭharging LiPo batteries has two stages: constant current and constant voltage. during charging the battery voltage will rise to that of the charge voltage until it hits its peak at 4,2v iirc vor the usual lipo cell.Īny voltage level meter applied during charging will display the charge voltage. Voltage level is afaik a valid method of evaluating a lipo cells charge.īattery charging involves applying a target voltage which will be higher than the undercharged battery voltage. The charge switch would be digitally controlled, and the monitor would only display when the charge switch was open or there was no charge voltage present. Here's a very simplified representation of how it could be done. If you are happy with your monitor that's good enough. Whether battery voltage, or whatever is being read by the monitor, is any kind of useful or accurate information is a separate issue.
![lipo battery monitor circuit lipo battery monitor circuit](https://www.picclickimg.com/pQgAAOSwIJpjAI6M/Car-Battery-Tester-Car-Battery-Monitor-Vehicle-Battery.jpg)
![lipo battery monitor circuit lipo battery monitor circuit](https://ae01.alicdn.com/kf/HTB1TRwjnIUrBKNjSZPxq6x00pXaP/Integrated-Circuits-2-in1-RC-Lipo-Battery-Low-Voltage-Meter-Tester-Indicator-1-8s-led-lipo.jpg)
Probably depends on the LiPo charging circuit, where/how the battery is being monitored. That's the trick for monitoring SLA batteries but I have no idea about LiPo's. You would need to temporarily disconnect the charger from the battery to read the actual battery itself.Īdded : Though that might not always be true if a less than 100% charged battery pulls the charging voltage down. That is correct, the monitor will always read what's being put into the battery 100%.
![lipo battery monitor circuit lipo battery monitor circuit](https://www.picclickimg.com/d/l400/pict/313012686006_/2-Stück-Turnigy-nano-tech-750mAh-1S-Lipo-Akku.jpg)
It would seem that if I ganged the wiring from the battery, the RPI and the 5V input, it will always indicate 100% while charging which would not be ideal. It works well for reading the level of a battery plugged into it. Sun 4:11 amThe indicator has two pinouts-battery + and. Just wondering if anyone else had encountered this and how they solved it. But for the charge scenario, I'm sure I am missing either a wiring correction/addition or a switching module of some sort. The indicator should display an accurate battery level while the ops module is connected. The question is: in scenario 2, how can the battery indicator show the progress of charging if it is connected to the output of the charge module? Scenario 2: If the ops module is disconnected and the charge module is connected, power flows from the external source thru the charge module to the battery (green arrows). The battery indicator is monitoring the output of the battery. Scenario 1: If the ops module is connected, power flows from the battery to the boost converter to the Pi (blue arrows). Note there are three modules-ops, power and charge, and that the ops and charge modules cannot be connected simultaneously. To help clarify, attached is a power distribution diagram.