The most prominent feature of the thermal battery is the high discharge current density, especially pulse discharge, which has high specific energy and power; followed by a short activation time, very flexible to use, this is unmatched by other battery; followed by the ability harsh environmental conditions, particularly the use of a wide temperature range. Therefore, thermal batteries appeared, favored by the military, first, put it to use in weapons. Thermal battery pole piece during the production process of the pole pieces, uneven density defects seriously affect the thermal and electrical properties of its runtime. In this paper, through the thermal battery pole piece uniformity of eddy current test in order to achieve thermal battery pole piece density of conformity assessment, which can ensure the product quality of the thermal battery.
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