I'm doing a balancing/electrolyte adjustment service on my battery pack and I observed that each cell has one of these "good" poles and one of these "bad" poles.
This is the "good" one. It looks matte gray, neat.
This is the "bad" one. It is black and flaking in layers. If dislodged, the flakes fall off and land on the plate guard.
Keep in mind, these are not the plates themselves. The plates are below a plastic cover with holes in it (the plate guard), and are covered with electrolyte and otherwise appear fine. What you see in the pictures are part of the header for the plates, which then extends to the outside of the battery to become one of the terminals.
Is this black flaking material normal? Is the water level lower than it should be? Should these headers be normally covered?
The unit is normally filled via a single point watering system, which tops out such that it leaves these things exposed.
This is the "good" one. It looks matte gray, neat.
This is the "bad" one. It is black and flaking in layers. If dislodged, the flakes fall off and land on the plate guard.
Keep in mind, these are not the plates themselves. The plates are below a plastic cover with holes in it (the plate guard), and are covered with electrolyte and otherwise appear fine. What you see in the pictures are part of the header for the plates, which then extends to the outside of the battery to become one of the terminals.
Is this black flaking material normal? Is the water level lower than it should be? Should these headers be normally covered?
The unit is normally filled via a single point watering system, which tops out such that it leaves these things exposed.