| 摘要 |
A device (14) for testing a battery, particularly a small portable battery (25 or 26) comprising a flexible transparent substrate (15) on which is deposited a narrow band of a black absorbant material (18). A conductive material (10) which tapers outwardly in opposite directions from a central point (11) to a pair of outer terminals (13 or 17) is then deposited atop the substrate (15) on the same side of the substrate (15) as absorber layer (18). A layer of a cholesteric liquid crystal material (15') is then deposited on the substrate (15) on the opposite side from the black absorber layer (18). The conductive material (10) is an epoxy cement-based conductor, preferably silver printed or painted directly on to the substrate (15). An indicator scale (19-22) is located along sections of the tapered conductive material (10). To test a dry cell battery (25 or 26) the terminal ends (13 or 17) of the conductive material (10) are placed in contact with the battery terminals, causing a current to flow which heats the conductive material (10) the heat being most intense at the central point (11) and radiating outwardly. The heat is transferred through the thin substrate (15) to the liquid cystal layer (15) which results in a color change in the liquid crystal. The traverse of the color change along the length of the indicator scale (19-22) outwardly from the central point (11) is proportional to the current or voltage output condition read on the indicator scale (19-22) which is calibrated accordingly. |
