Preparation method and system of iron-chromium redox battery electrolyte

An electrolyte and electrolyte pipeline technology, applied in the field of energy storage, can solve problems such as increasing the cost of equipment or raw materials, and achieve the effects of reducing the amount of raw materials, accurate concentration, and improving battery performance and capacity

Inactive Publication Date: 2021-06-18
坤厚储能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, it is necessary to consume energy to heat the pure water used in the preparation of the electrolyte or to add a reducing agent in the process of preparing the electrolyte (for example, patent CN102884662A), which also increases the cost of equipment or raw materials.

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  • Preparation method and system of iron-chromium redox battery electrolyte

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Comparison scheme
Effect test

Embodiment 1

[0040] see figure 1 , the present embodiment proposes a system for preparing an electrolyte for an iron-chromium redox battery, comprising an electrolyte dissolution kettle 1, a pure water tank 3, a hydrochloric acid tank 2, a solid feeding device 5, an electrolyte filter 10 and an electrolyte storage tank 4,

[0041] The pure water tank 3, the hydrochloric acid tank 2, and the solid feeding device 5 are respectively connected to the top of the electrolyte dissolution kettle 1 through pipelines;

[0042] The lower part of the electrolyte solution kettle 1 is connected to the electrolyte filter 10 through the electrolyte pipeline, and the electrolyte filter 10 is connected to the electrolyte storage tank 4 .

[0043] In the present embodiment, the electrolytic solution dissolving kettle 1 adopts a tank body lined with tetrafluoroethylene, and an acid-resistant steel-lined tetrafluoroethylene stirring device is installed in the reaction vessel;

[0044] Both the pure water tan...

Embodiment 2

[0052] This embodiment proposes the preparation method of the electrolyte of iron-chromium redox battery, adopts the system of embodiment 1, comprises operation:

[0053] 1) Add water into the electrolyte dissolution kettle 1;

[0054] 2) open the nitrogen to make the nitrogen fill the dissolving kettle, and chromium chloride (CrCl 3 ·6H 2 (2) and hydrochloric acid are added in the electrolytic solution dissolving kettle 1 under the condition of cutting off the air, open and stir in the process of adding chromium chloride;

[0055] 3) After fully stirring, after the chromium chloride is completely dissolved, add ferrous chloride (FeCl 2 4H 2 O) join in the electrolytic solution dissolving kettle 1 under the condition of cutting off the air, stir until ferrous chloride dissolves completely.

[0056] 4) The electrolyte is filtered into the electrolyte storage tank, filled with nitrogen, and sealed for storage.

[0057] In this embodiment, the water used in step 1) is pure wat...

Embodiment 3

[0069] This embodiment proposes the preparation method of the electrolyte of iron-chromium redox battery, adopts the system of embodiment 1, comprises operation:

[0070] 1) Add water into the electrolyte dissolution kettle 1;

[0071] 2) open the nitrogen of the dissolving still, make nitrogen be full of dissolving still; Chromium chloride (CrCl 3 ·6H 2 (2) and hydrochloric acid are added in the electrolytic solution dissolving kettle 1 under the condition of cutting off the air, open and stir in the process of adding chromium chloride;

[0072] 3) After fully stirring, after the chromium chloride is completely dissolved, ferrous chloride is added into the electrolyte dissolution kettle 1 under the condition of cutting off the air, and stirred until the ferrous chloride is completely dissolved.

[0073] 4): Filter the electrolyte into the electrolyte storage tank, fill it with nitrogen, and keep it sealed.

[0074] In this embodiment, the water used in step 1) is pure wate...

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Abstract

The invention provides a preparation method and system of an iron-chromium redox battery electrolyte. The preparation method comprises the following steps: 1) adding water into a reaction container; (2) adding CrCl3 and hydrochloric acid into the reaction container under the condition of isolating air, and starting stirring in the process of adding chromium chloride; and 3) after the chromium chloride is completely dissolved, adding ferrous chloride into the reaction container under the condition of air isolation, and stirring until the ferrous chloride is completely dissolved. According to the preparation method of the iron-chromium redox battery electrolyte, heating is not needed, additives are not added, the process is simple, green and environment-friendly, efficient and low-cost electrolyte production is achieved, and the battery performance and capacity of an iron-chromium flow battery are improved. Compared with the electrolyte solution in the prior art, the electrolyte solution produced by the preparation method has the advantage that the performance of the iron-chromium flow battery is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and in particular relates to a preparation method and a preparation system for an electrolyte solution of a battery. Background technique [0002] Due to the intermittent and unstable power generation of renewable energy, it is impossible to provide stable power supply. Therefore, when developing these renewable energy sources, it is necessary to develop a large-scale electric energy storage system to realize peak-shaving and valley-filling of the power grid and ease the contradiction between power supply and demand. Compared with the existing lithium-ion secondary batteries and lead-acid batteries, most of the structural materials of the redox flow battery are carbon materials, engineering plastics, etc., and the price is low; the battery can achieve a large capacity and is safe; because The power and capacity of the battery are designed independently of each other, so charging and disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0005H01M2300/0088Y02E60/50
Inventor 不公告发明人
Owner 坤厚储能科技有限公司
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