In most cases, the volume of a battery does not significantly increase when it is fully charged. The reason for this is that the components of the battery, such as the electrodes and electrolyte, do not undergo substantial physical expansion during the charging process.
However, there can be some minor changes in volume due to factors like thermal expansion or slight changes in the density of the electrolyte. For example, in lead-acid batteries, the electrolyte may expand slightly as it becomes more concentrated during charging, but this expansion is typically minimal and does not result in a noticeable increase in volume.
Overall, the volume of a battery remains relatively stable during the charging process. However, it’s essential to ensure that the battery is housed in a container or enclosure with sufficient space to accommodate any potential changes in volume and to prevent damage to the battery or surrounding components.