ldallan
Well-known member
Is the following a helpful or flawed analogy regarding the way an EV Li-Ion battery is stressed by being charged to high percentages near 100%.
Consider a balloon that is repeatedly filled to different levels of fullness.
There is minimal stress to partially filling the balloon, such as to 70% to 80% capacity. It will handle many fillings without the skin of the balloon failing with a "POP".
However, if the balloon is filled to capacity ... 95% to 100% ... then we might expect the balloon to fail with significantly fewer fillings. Like the EV battery, it is relatively hard on the balloon/battery to be filled to capacity.
Note that this non-scientist is ignorant about what is actually going on inside the battery from the perspective of physics and/or chemistry.
Consider a balloon that is repeatedly filled to different levels of fullness.
There is minimal stress to partially filling the balloon, such as to 70% to 80% capacity. It will handle many fillings without the skin of the balloon failing with a "POP".
However, if the balloon is filled to capacity ... 95% to 100% ... then we might expect the balloon to fail with significantly fewer fillings. Like the EV battery, it is relatively hard on the balloon/battery to be filled to capacity.
Note that this non-scientist is ignorant about what is actually going on inside the battery from the perspective of physics and/or chemistry.