General > General Technical Chat
Conservation and the loss of charge of NiMH batteries
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msuffidy:
Since energy is supposed to be converted but not lost, what happens to the energy that charged a NiMH battery had when it loses it when on the shelf for a long time? Obvious interpretations are loss through slow cirucit path through air, and internal chemical degradation.
ogden:
https://en.wikipedia.org/wiki/Self-discharge
https://batteryuniversity.com/learn/article/elevating_self_discharge
msuffidy:
I guess maybe in the least damaging case, somehow the electrons escape and slowly leave the battery in the form of heat.
ogden:

--- Quote from: msuffidy on January 09, 2021, 09:37:10 pm ---I guess maybe in the least damaging case, somehow the electrons escape and slowly leave the battery in the form of heat.

--- End quote ---
Your guess is wrong in case of NiMh cells because they absorb heat during (self)discharge.
magic:
So where the energy goes and if it stays inside, how can you charge the battery back to the initial state by shoving a nominal load of energy into it, without it getting unusually hot in the process?

My vote is for heat, unless you have some convincing argument.
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