Battery tester with stacked thermochromic elements

Details Battery tester with stacked thermochromic elements Battery tester with stacked thermochromic elements

1995-06-07

1996-09-17

Regan, Maura K.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

340636, 359 51, 429 91, G01R 2726, H01M 1048

Patent

active

055572081

ABSTRACT:
A thermochromic apparatus for testing dc voltage sources, particularly small, low voltage disposable batteries, employs a very thin resistive heater layer deposited onto a flexible dielectric substrate. A series of thermochromic elements are "stacked" (mounted on top of one another) at a single thermochromic site proximate the resistive heater. During testing current from the battery flows through the resistive layer heats the substrate, causing a series of thermochromic elements mounted on the substrate to undergo visual "temperature events" (such as color changes) at progressively higher temperatures. The thermochromics may be stacked in a series of discrete films, each film containing a dye for one temperature event. Alternatively, the thermochromics may be contained in microcapsules in a common film.

REFERENCES:
patent: 4501503 (1985-02-01), Buirley et al.
patent: 4702563 (1987-10-01), Parker
patent: 4835475 (1989-05-01), Hanakura et al.

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