stuartpittaway/diyBMSv4

Run away balance feature (all in one monitor) - is it working?

Closed this issue · 2 comments

chapulino commented

Stuart I continue with the tests, in this case I try to see how the Run Away system works (in the absence of an active balancer, only with the balancing plate).
But in principle I do not see that it acts by downloading any cell.
Maybe it's my mistake when configuring this function.
I start from a battery with cells in the range 3.85 v 3.70 v
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stuartpittaway commented

Ok - the run away cell balance is meant to detect when the highest cell as "run away" from the others.

This is calculated by:

  1. The highest cell has to be over the "cell minimum voltage" (specified on the configuration)
  2. The difference of that cell has to be X millivolts over the AVERAGE of the other cells (X=specified on the configuration)

In your screenshot you have cell voltages of:

3.771 3.819 3.821 3.791 3.834 3.825 3.835 3.769 3.721 3.751 3.735  3.724 3.735 3.742 3.696 3.741

This gives an average cell voltage of 3769mV

The highest is cell 6 at 3835mV (this is over 3500 configuration value = valid)
The difference between the highest cell and the average is 65mV (3835 - 3769) - which is over the 50mV configuration value.

So in this scenario, balancing on CELL 6 should be running.

Note that the "balance board" is only detected on power up of the 16S board. If you have plugged it in afterwards, balancing will not occur.

Can you raise a second issue if you have a problem with the current monitoring please.

chapulino commented

Thank you, I have already been able to verify the operation, I was confused because I expected to see a download indication in the Cells monitor. I see that the balancing is done in the background.

Perfect
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