Re: Various Senoko oddities

It is one from crows supply.

Do you remember which resistor it was?

Re: Various Senoko oddities

R302. In this pic: http://bunniefoo.com/novena/pvt1_releas … o_dvt1.jpg it's the green one right next to the Moley Battery connector on the left site of the board.
BUT I guess bunnie should say something about, how likely you have the same problem like we had. It took is quite some time to find the problem (~ 2h, from which 10 min were the fix itself)

Re: Various Senoko oddities

I think I have fixed the issue on it. I have been working with a guy at my school that specializes in battery board design. I have a few notes from him that would be helpful for the future:

-  With this Gas Gauge type, the cells must be connected in a certain order, which is as follows: GND, Cell 1, Cell 2, Cell 3, and Cell 4 (if there is one). Then you can connect the larger power molex connector.

- If you are having an issue where the board is refusing to charge or discharge the battery, the cells may be uneven. If they are uneven beyond a certain point (40-100 mV is the point, I am not sure yet), the board assumes the battery is dead and won't charge them.

- There is enough current from the cells that there can be an arc, and this can damage the gas gauge. if there is a revisiion, he recommends some sort of circuit so it won't arc like that.

In my board, I think the connector was damaged and did not provide the right power to the gas gauge. This eventually damaged the IC and I had to replace the gas gauge and the connector.

54 (edited by chris4795 2016-04-29 09:00:03)

Re: Various Senoko oddities

Unfortunately, I am now at an issue where the battery board can and will discharge, but will not charge. If I plug in AC power, it goes to a current of 0 mA. The Senoko can tell that AC is being plugged in and unplugged.

EDIT: This appears to be normal behavior. After I discharged the battery for a while longer, the battery started charging (when you plug it in, it takes up to 30 seconds for the stats command to show it is charging).

Re: Various Senoko oddities

The "charging" flag is based on the 60-second running average, so it makes sense that it can take 30 seconds for the "current" to go positive.

Re: Various Senoko oddities

That makes sense! Well it has been working normally since my last post, so I think whatever issues I have been having are over!