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Patent

Electrochromic thin film state-of-charge detector for on-the-cell application

TLDR
In this paper, a tester for voltage and state-of-charge determination of a battery is presented. But the tester can be permanently mounted on the battery and employs an electrochromic cell which changes visual appearance, for example, color or intensity of color when electrically connected across the terminals of the battery.
Abstract
A tester for use in determining the voltage and state-of-charge of a battery. The tester can be permanently mounted on the battery and employs an electrochromic cell which changes visual appearance, for example, color or intensity of color when electrically connected across the terminals of a battery. The electrochromic cell undergoes an oxidation/reduction reaction on direct application of the DC potential of the battery. The color of the electrochromic cell can be compared with a color comparison chart to determine the condition of the battery. The tester can be permanently electrically connected to the battery or, preferably, can be connected momentarily to determine the state of the battery.

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Citations
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Patent

State of charge indicator for battery

TL;DR: In this paper, a state of charge indicator includes a current sensing circuit for sensing and converting charge or discharge current of a battery into a bipolar voltage, a counter circuit counts battery charge, and a charge/discharge circuit is operatively connected to the current sensing and counter circuits.
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An electrical circuit component formed of a conductive liquid printed directly onto a substrate

TL;DR: In this article, an electrical component is capable of performing its electrical circuit functions, as printed, and without the necessity for post-printing processes such as metal etching, catalytic ink activation, or electroless deposition.
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Method of making a thin film battery

TL;DR: In this paper, a flexible thin-film battery with a porous anode and a porous cathode is described, with an electrolyte and separator layer positioned between the porous anodes and the porous cathodes.
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Electrochemical Apparatus With Barrier Layer Protected Substrate

TL;DR: In this paper, the authors proposed a method for fabricating high performance thin-film batteries on metallic or polymeric substrates by using an appropriate barrier layer composed of barrier sublayers.
References
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Patent

Single-compartment, self-erasing, solution-phase electrochromic devices, solutions for use therein, and uses thereof

TL;DR: In this paper, a solution-phase electrochromic device for variable transmittance components of variable transmission light filters, including windows, and variable reflectance mirrors, including anti-glare rearview mirrors in automobiles.
Proceedings ArticleDOI

Large-Area Chromogenics: Materials and Devices for Transmittance Control

TL;DR: A broad coverage of large-area chromogenics and their applications is given in this paper, which is divided into the following areas: applications; photochromic materials, thermochromic materials; inorganic electrochromic material, organic electro chromic materials and liquid crystals materials and devices.
Patent

Battery package with battery condition indicator means

TL;DR: In this article, the authors present a package for the sale and display of batteries having a voltage indicator integrally associated with the package and a pair of electrical contacts are associated with voltage indicator and the contacts are so positioned on the package that they are accessible for alignment with the terminals of a battery placed there between.
Patent

Battery with strength indicator

TL;DR: A battery strength indicating and switch means on a battery which is coupled across the terminals of the battery and which is provided with an indicating means to indicate the strength of battery and in addition, the battery strength indicator means is also provided with a in-line switch which can easily be depressed to complete the circuit so as to place the indicator means across the terminal of the cell and display the charge of battery as discussed by the authors.