Battery

A battery and electrolyte technology, applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of battery performance deterioration, battery safety hazards, battery swelling, etc., to suppress battery performance attenuation, suppress gas, and avoid The effect of battery drum

Inactive Publication Date: 2015-01-14
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, after the battery is used for a period of time, a large amount of gas will be generated inside the battery, which will easily cause the battery to bulge, resulting in a safety hazard in the use of the battery; at the same time, due to the generation of gas, the performance of the battery will deteriorate rapidly

Method used

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Examples

Experimental program
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Effect test

Embodiment approach

[0049] In a preferred embodiment, the battery containing the positive electrode collector can also be charged and discharged to achieve the purpose of passivating the positive electrode collector. The voltage is charged to 2.1-2.4V when charging, and the voltage is released to 1.35-2.4V when discharging. 1.45V, charge and discharge times not less than 1.

[0050] In a specific embodiment, when preparing the positive electrode, in addition to the positive electrode active material, depending on the actual situation, it may be necessary to add a positive electrode conductive agent and a positive electrode binder to improve the performance of the positive electrode.

[0051] The positive electrode conductive agent is selected from one or more of conductive polymers, activated carbon, graphene, carbon black, graphite, carbon fibers, metal fibers, metal powders, and metal flakes.

[0052] The positive electrode binder can be selected from polyethylene oxide, polypropylene oxide, po...

Embodiment 1

[0102] Lithium manganese oxide LMO, conductive agent graphite, binder SBR and CMC are mixed in water according to the mass ratio of 90:5:2.5:2.5 to form a uniform positive electrode slurry. The positive electrode slurry was coated on both sides of the positive electrode current collector (50 μm stainless steel wire mesh) coated with a conductive film to form an active material layer, which was then pressed into sheets and cut into a size of 8×10 cm to make a positive electrode. The thickness of the positive electrode sheet is 0.4mm, and the surface density of the positive electrode active material is 750g / m 2 .

[0103] A zinc foil with a thickness of 50 μm was used as the negative electrode. The diaphragm is an AGM glass fiber diaphragm. The separator and negative electrode are comparable in size to the positive electrode.

[0104] Weigh zinc sulfate and lithium sulfate of a certain quality, add them to dissolve in water, then add bismuth trioxide, configure the zinc sulfa...

Embodiment 2

[0107] The difference from Example 1 is that the content of bismuth trioxide is 2wt%, and other parts are the same as in Example 1. Get the battery and call it A2.

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Abstract

The invention discloses a battery. The battery comprises a positive pole, a negative pole and electrolyte and also comprises an additive, wherein the positive pole comprises a positive pole active substance, and first metal ions can be reversibly separated from or embedded into the positive pole active substance; the electrolyte comprises at least one solvent through which the electrolyte can be dissolved and ionized; the electrolyte comprises second metal ions and the first metal ions; in the charging and discharging processes, the second metal ions can be reduced and deposited on the negative pole, so as to form second metal, and the second metal can be reversibly oxidized and dissolved; the first metal ions can be reversibly separated from or embedded into the positive pole in the charging and discharging processes; and the additive is added into the negative pole and/or the electrolyte and refers to a bismuth compound. According to the battery disclosed by the invention, gases are effectively inhibited, so that the battery is prevented from swelling, and the safety performance of the battery is enhanced.

Description

technical field [0001] The invention belongs to the field of batteries, in particular to a battery based on internal ion exchange. Background technique [0002] Lead-acid batteries, which have been around for more than a hundred years, have mature battery technology and occupy an absolute market share in energy storage fields such as car starter batteries, electric bicycles, and UPS. Although the lead-acid battery has a low cycle life and a relatively low energy density, it has the advantages of very low price and high cost performance. Therefore, in recent years, nickel-metal hydride batteries, lithium-ion batteries, sodium-sulfur batteries, etc., cannot replace lead-acid batteries in the field of energy storage. [0003] A battery based on internal ion exchange has emerged. The working principle of the battery is that the positive electrode is based on the extraction-intercalation reaction of the first metal ion, and the negative electrode is based on the deposition-diss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/36H01M10/05H01M10/056
CPCH01M4/62H01M10/04H01M10/056H01M10/36Y02E60/10
Inventor 刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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