Re-hydrating the battery modules.

My question is why would you have to re-hydrate a sealed module? I am reconditioning a pack. I have only worked on two modules. Many of the modules on one side that have not been charged or discharged have a small amount of liquid forming on the plastic below the terminal towards the bottom of the module. I rolled the pack over to get to the nuts on the underside of the pack. This may have put pressure on the terminals on one side. I do not know. Has anyone encountered this situation. If a drop of fluid comes out of a module, would that mean that module needs to be discarded? Example of problem - https://share.icloud.com/photos/08f8Pu0-07BDih5cV_vEH646Q The liquid looks blue but I think that is a reflection of a nearby object.

 

The bus bars had been removed so I don’t think it could have come from that. Do you have a feel for this as a problem? Have you ever heard of this before? I went and checked the pack a moment ago. I felt the terminal posts and they were wet. The weather here is wet and very humid. I would imagine the humidity is close to 100%. It has warmed up in the last several hours. If the battery pack is cooler than the surrounding air it is very possible that the liquid could be condensation.

 

That looks like purple/pink ink on the end of that flange, and it looks damp all the way to the end. The blue color in the "deeper" part could just be pigment migrating from that ink throughout the fluid, and it only looks blue in the part thick enough to reflect a significant amount of colored light.

Does the blue fluid occur in any area without that ink?