Charge control of a metal-air battery

An air battery pack and battery technology, which is applied in the direction of secondary battery charging/discharging, battery circuit device, arrangement of multiple synchronous batteries, etc., can solve the problem of incorrect battery charge state data and batteries that cannot be suitable for metal-air batteries group and other problems to achieve the effect of shortening the service life

Active Publication Date: 2017-04-19
ELECTRICITE DE FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These charge control devices are not suitable for battery packs with metal-air cells where voltage fluctuations can cause incorrect battery state-of-charge data, and it is important to be careful not to exceed the Threshold potential at the electrode

Method used

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  • Charge control of a metal-air battery
  • Charge control of a metal-air battery
  • Charge control of a metal-air battery

Examples

Experimental program
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Embodiment Construction

[0079] The invention relates to the charging of a battery pack composed of metal-air batteries connected in series, parallel or a combination of series and parallel.

[0080] The most successful and efficient metal-air batteries in terms of lifetime are three-electrode batteries such as figure 1 battery shown. figure 1A battery pack consisting of a single metal-air battery 10 is schematically illustrated. Such a battery 10 includes an electrolyte 4, usually formed from an alkaline solution. A negative electrode 1 , usually a metal such as zinc, iron or lithium, is connected to the negative terminal of a charger 5 . When discharging, the first air positive electrode 2 is used for the power circuit. During charging, the first air positive electrode 2 is only used to measure the potential of the negative electrode 1 . The charging or discharging mode of operation can be selected via a switching device 6 such as a relay. The second oxygen-releasing positive electrode 3 is onl...

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Abstract

The invention relates to a method for managing the charge of a metal-air battery comprising at least one cell (10, 11, 12). The cell comprises a negative electrode (1), a first positive air electrode (2) and a second positive oxygen-release electrode (3). For each cell, during the application of a charge current circulating in the cell between the negative electrode (1) and the second positive oxygen-release electrode (3), the absolute value of a potential of the negative electrode (1) is compared with a critical threshold value (50), the potential of the negative electrode (1) being determined relative to the first positive air electrode (2). When the absolute value of the potential (301) of the negative electrode (1) reaches the threshold value, a surplus charging current, depending on the difference between the current applied to the cell and the charging current, is diverted.

Description

technical field [0001] The invention relates to the field of charge control of metal-air batteries comprising metal-air cells with three electrodes. Background technique [0002] The cells of a metal-air battery utilize a metal-based negative electrode, such as zinc, iron, or lithium, coupled to an air electrode. The most commonly used electrolytes are aqueous alkaline electrolytes. [0003] During the discharge of such a battery pack, oxygen is reduced at the positive electrode and metal is oxidized at the negative electrode: [0004] Discharge at the negative electrode: M→M n+ +ne - [0005] Discharge at positive electrode: O 2 +2H 2 O+4e - →4OH - [0006] The metal-air system has the advantage of utilizing a positive electrode of unlimited capacity, since the oxygen consumed at the positive electrode does not need to be stored in the electrode and can be harvested from ambient air. Therefore, it is well known that the metal-air type electrochemical generator has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M12/08H02J7/00
CPCH01M10/44H01M12/08H02J7/007H02J7/00304H02J7/0013H02J7/0069Y02E60/10H02J7/0068H02J7/00
Inventor 菲利普·史蒂文斯朱利恩·尔赫梅诺尔特格韦纳埃勒·陶萨因特
Owner ELECTRICITE DE FRANCE
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