Battery and battery system

A battery system and battery technology, applied in the direction of fuel cells, regenerative fuel cells, fuel cell additives, etc., can solve the problems of unsatisfactory power grid energy storage applications, expensive selective ion exchange membranes, complex battery structures, etc. The problem of discharge capacity attenuation, the effect of accelerating the charge and discharge reaction, and accelerating the movement of ions

Active Publication Date: 2020-12-01
巨安储能武汉科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current flow batteries cannot meet the needs of grid energy storage applications due to the high cost of selective ion exchange membranes and complex battery structures.

Method used

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  • Battery and battery system
  • Battery and battery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment corresponds to a zinc-air self-layering battery, as shown in the attached figure 1 The battery container shown is a sealed polypropylene jar. A disc made of graphite felt is set at the bottom of the battery as the positive current collector of the battery. The surface of the carbon felt is loaded with platinum metal nanoparticles. A zinc plate is set on the upper part of the battery as the negative electrode. There is organic solvent perfluorodecalin in the battery, organic ion compound LiTFSI salt is dissolved, and the aqueous electrolyte is potassium tetrahydroxyzincate (K 2 Zn(OH) 4 ) aqueous solution. Perfluorodecalin is insoluble in water and will sink below the aqueous electrolyte to form a separate phase. When the battery is charged, the positive current collector and the zinc negative electrode are connected to the power supply through an external circuit; when the battery is discharged, the positive current collector and the zinc negative e...

Embodiment 2

[0025] This embodiment corresponds to a zinc-air self-layering battery system, as shown in the attached figure 1 As shown, the liquid air storage tank is a sealed polypropylene jar, the organic solvent inside is perfluorodecalin, the organic ionic compound LiTFSI salt is dissolved, and the aqueous electrolyte is sodium tetrahydroxyzincate (Na 2 Zn(OH) 4 ) aqueous solution. Perfluorodecalin is insoluble in water and will sink below the aqueous electrolyte to form a separate phase. An air valve is installed on the polypropylene jar, when the air valve is opened, the oxygen in the air will dissolve in perfluorodecalin, and the air valve will be closed after one hour of opening. Through the first liquid pump, perfluorodecalin and aqueous electrolyte flow out of the liquid air storage tank in a ratio of 1:1 (the flow rate is controlled by the first flowmeter and the second flowmeter), and enter the second flowmeter through the first three-way valve. A flow pipe then flows into t...

Embodiment 3

[0027] The difference between this example and Example 2 is that different organic solvents and organic ionic compounds are used, the size of the battery system device is set, and carbon nanotubes are loaded on the positive electrode current collector in the battery as the positive electrode catalyst. This embodiment corresponds to a zinc-air self-layering battery system, as shown in the attached figure 1 As shown, the liquid air storage tank is a sealed polypropylene tank with an inner diameter of 100 cm, a wall thickness of 1 mm, and a height of 100 cm. There are organic solvents 1H, 1H, 5H-octafluoropentyl 1, 1, 2, 2-tetrafluoroethyl ether ( OTE) 200L, dissolved with 1 kg of organic ionic compound tetrabutylammonium bistrifluoromethanesulfonimide, the aqueous electrolyte is 5mol / L tetrahydroxy potassium zincate (K 2 Zn(OH) 4 ) aqueous solution 200L. OTE is insoluble in water and will sink below the aqueous electrolyte to form an independent phase. An air valve is install...

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Abstract

The invention mainly aims to provide a battery and a battery system so as to provide a diaphragm-free low-cost energy storage scheme with a simple structure. In the scheme, a battery is automaticallydivided into an organic solvent layer, a water-based electrolytic solution layer and a zinc negative electrode layer under the action of gravity, a positive electrode and a negative electrode do not need to be separated by a diaphragm, a large amount of oxygen is dissolved in the organic solvent and is the redox active substance of the positive electrode, the main component of the zinc negative electrode is zinc which is the redox active substance of the negative electrode, and after charging and discharging, the organic solvent and the water-based electrolytic solution flow out of the battery, flow into a liquid air storage tank through a second liquid flow pipeline to be stored, and flow into the battery through a first liquid flow pipeline to be charged and discharged as required; and the positive electrode current collector in the battery can rotate to accelerate the liquid convection effect and accelerate the charge-discharge rate. Due to the design, the capacity and power of thebattery are decoupled, the capacity of the battery is determined by the size of the liquid air storage tank, and the current density and power are determined by the size of the battery; and the battery system is diaphragm-free, so that the battery cost is reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery and a battery system. Background technique [0002] With the energy crisis and environmental pollution becoming increasingly prominent, new energy generation such as solar energy and wind energy can effectively alleviate energy consumption. However, wind power generation has the natural characteristics of randomness, volatility, and intermittency, and the generated electric energy cannot be directly input into the grid on a large scale. Energy storage technology can flexibly store electricity generated by solar and wind energy, buffer power fluctuations, and ensure the smooth operation of the power grid. [0003] Among energy storage technologies, flow batteries are especially suitable for large-scale energy storage because of the decoupling of power and capacity, and have become the key development targets of countries all over the world. However, current flow batt...

Claims

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Application Information

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IPC IPC(8): H01M8/18H01M8/04082H01M8/04089H01M8/04186H01M8/04746
CPCH01M8/04089H01M8/04186H01M8/04208H01M8/04753H01M8/188Y02E60/50
Inventor 孟锦涛
Owner 巨安储能武汉科技有限责任公司
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