Non-count nouns refer to items that cannot easily be counted. They represent a concept or physical thing that is seen to be a whole, like happiness.
Such nouns should occur only in the singular. Thus, English has no plural form of equipment (there is no such word as equipments).
Break this rule and your error will be obvious or you will break the natural rhythms of English. So, with some readers, you might get away with:
O  The collaborations between Kelly and the aliens were fruitful.
However, more natural and elegant English is:
P  The collaboration between Kelly and the aliens was fruitful.

Non-count nouns escape the notice of second-language speakers. Because of this, it would be useful to have a rule like always use the singular. But such a rule is impractical; you just have to learn which nouns are non-count.
In academic writing, do not even think of turning the following into plurals:

Advice
Collaboration
Functionality
Harm
Happiness
Information
Logic
Knowledge
Literature
Research
Rigidity
Subjectivity

If it is necessary to signify that multiple versions of the entity exist, use a form like types of knowledge or processes of logic.

Plural variants

Unfortunately, English is complicated because some non-count nouns have plural variants. Typically, the plural means something different from more than one of the singular item. For example, wood refers to the material we remove from trees. So, I might say:
P  James, please fetch more wood for the fire.
And James may well go off and return with an armful of logs (pieces of wood).
You cannot use woods to mean pieces of wood, logs, sticks, or planks. Thus, this is broken English:
O  James, please fetch more woods for the fire.
English does have the plural woods but that plural means forest.
P  Little Red Riding Hood went walking in the woods.
P  To get wood for the fire, James went deep into the woods.
Similarly, we may say:
P  James went shopping for oil and returned with three bottles of olive oil.
For this event, we cannot say:
O  James went shopping for oil and returned with three olive oils.
In English, oils refers to types of oil. Thus, you could say:
P  For the stir-fry, James considered three oils: olive, sunflower, and avocado.
Some nouns that are usually non-count but have plural variants:

Bread
Cheese
Disruption
Enrolment
Evolution
Exploration
Grammar
Hair
Hunger
Imagination
Immunisation
Justice
Leather
Nature
Permission
Timber
Time
Water
Whiskey
Wine
Yeast