Method and device for determining expansion rate of battery and calamine cream or hydrogen evolution amount of zinc powder

The invention discloses a method and a device for determining an expansion rate of a battery and calamine cream and a hydrogen evolution amount of zinc powder. The device comprises a main pipe capable of containing the calamine cream or the battery, wherein the diameter of the main pipe is 14.5-25.0mm and a measuring pipe which is in U-shaped communication with the main pipe is arranged at one part which is 10-30cm far away from the bottom of the main pipe; and volume scales are marked on the outer wall of the measuring pipe. The device disclosed by the invention is small and simple in structure; the loading of an object to be tested is accurate and the taking and placing are easy; the use amount of electrolyte is small and can be completely same as an actual condition; and the device is easy to wash, clean and operate so as to avoid the difference between measured data and the actual condition caused by excessive electrolyte. According to the determining method disclosed by the invention, the expansion rates