#LIPO BATTERY MONITOR CIRCUIT SERIES#

Calibrate Voltage Monitor using a multimeter measure the output voltage of your battery, from balancing-port cable wires, and enter that in the “Measured battery voltage” field.With FW version 3.1.x and 3-2 without NuttX:.Enable voltage measurement pins in Mission Planner – Advanced Parameter List setting.Connect LIPO voltage to one of Lipo Voltage pins (10, 11 or 12).BAT_MONITOR = 3 for voltage only and 4 for voltage and current.In Mission Planner verify that the parameters: While voltage monitor does not need any other tool, for current monitoring you need a special cable with a current monitor chip. Supported voltage monitor is up to 6S (30 volts). To monitor battery voltage connect the + cable from your batetry to the 3d central pin of the OUTPUT side of the board. You can enable this measurement in the Mission Planner in order to measure your battery voltage and transmit this info to Ground Control Station thru MAVLINK telemetry. Anyway, if all you want is to measure the pack voltage, for a couple pennies for FET's and resistors, you can do this with the micro you plan to use.VRBRAIN has a built in voltage sensor, in the form of a voltage divider circuit connected to an analog input pin on the processor. The cap is there as most A/D's consume some current during the conversion, so if the input is high impedance it can throw off the measurement. You will need to wait for the circuit to settle a short period after turning the divider on, as it will take some time for the filter resitor on the Vin pin to come to equilibrium. When you drive the 2N7002 gate high, it conducts, which generates a gate to source voltage on the BSS84 P-Channel FET, turning it on, which then energizes the resistive divider. You would attach the gate of the 2N7002 to the GPIO pin of your micro, and the Vin pin shown on the schematic would go to your A/D. You would use the circuit consisting of the BSS84, SN7002, 2 10K R's, the divider R's (shown as a divide by 10 in the schematic). The DS2788 uses this idea of enabling the divider only when the measurement needs to be made. If as you said in the first post, all you want to do is measure the entire pack voltage, this can be done with a resistive divider, a couple FET's so that you only turn the divider on when you made the measurement, and a GPIO pin on your processor to enable the divider.

Now, this above example is only for 2 cells, imagine in 6 cells, thing will become nastier real fast if cell monitoring is not properly done. Especially Li-xx based battery that has very strict lower voltage limit when discharging, without monitoring 'every' cell's voltage, the battery pack's life will be shortened really fast and the weakest cell will die sooner, same requirement also applies in charging mechanism. 1904 Adafruit Power Management IC Development Tools Micro Lipo Charger w/MicroUSB Jack datasheet. If you drain it say until 6 volt as cut off voltage with the 'assumption' they are identical, this condition might ruin the weak cell since it might drained below safe voltage say like 2.7 volt while the other stonger cell still at 3.3 volt. IoT based Lithium Battery Monitoring System using ESP8. For example in 2 cells configuration, say one cell is a bit weaker at 3.9 volt while the other at 4.1 volt, total is 8 volt, and in this particular scenario you just cannot assume each cell's voltage is 8 volt / 2 cells = 4 volt.

#LIPO BATTERY MONITOR CIRCUIT SERIES#

Yep, if you want the whole series of batteries to perform at their best, cause when working at > 1 cells, those battery cells might not have 'identical' condition and capability.

Lipo battery monitor circuit