CN222775338U

CN222775338U - Compressed air-based flow battery cooling and heating system

Info

Publication number: CN222775338U
Application number: CN202420639142.1U
Authority: CN
Inventors: 赵向飞; 常广; 李绍�; 林锥; 李伟; 王怀喜
Original assignee: Beijing Jingyi Instrument & Meter General Research Institute Co ltd
Current assignee: Beijing Jingyi Instrument & Meter General Research Institute Co ltd
Priority date: 2024-03-29
Filing date: 2024-03-29
Publication date: 2025-04-18
Anticipated expiration: 2034-03-29

Abstract

The utility model relates to the technical field of flow battery temperature control, in particular to a compressed air-based flow battery cooling and heating system, which comprises a tray, wherein a circulating pump, a cooling and heating mechanism, a liquid storage tank and a pile support are arranged on the tray, electrolyte is stored in the liquid storage tank, a pile communicated with the liquid storage tank is arranged on the pile support, the cooling and heating mechanism is communicated with the electrolyte in the liquid storage tank, the cooling and heating mechanism comprises a pressure switch valve capable of controlling compressed external air, and the problems of poor insulation performance, high power consumption and high manufacturing cost of the system caused by the fact that an existing flow battery is cooled by a water chiller and a plate heat exchanger and heated by a resistance wire or heated by high-frequency induction are solved. According to the cooling and heating system of the flow battery designed by the scheme, the same set of hardware system is adopted, so that the cooling of the flow battery can be realized, the heating of the flow battery can be realized under a low-temperature environment, and the space and the cost are greatly saved.

Description

Compressed air-based flow battery cooling and heating system

Technical Field

The utility model relates to the technical field of flow battery temperature control, in particular to a compressed air-based flow battery cooling and heating system.

Background

With the development of large-scale energy storage technology, flow batteries with different electrolyte media, including iron-chromium flow batteries, all-vanadium flow batteries, zinc-nickel flow batteries, zinc-bromine flow batteries and the like, all of the working principles are that electrolyte is input into a battery stack through a liquid pump to carry out chemical reaction, and the temperature is an important factor influencing the chemical reaction, so that the temperature must be controlled in a reasonable temperature range, otherwise, the charge and discharge are influenced and the charge electrode is damaged. The conventional heating mode adopts resistance wire or high-frequency induction heating, and a set of heating device is additionally added on the basis of a cooling device, so that the power consumption is continuously increased, the manufacturing cost is further increased, and the method is difficult to apply to large-scale energy storage.

There is a need for an economical, environmentally friendly, dielectric-insulated cooling and heating system that achieves both cooling of the flow battery electrolyte at high temperatures and heating at low temperatures with a low power consumption and extremely simple system to maintain a certain temperature range.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model aims to provide a compressed air-based flow battery cooling and heating system which can solve the problems of high power consumption and high manufacturing cost of the traditional heating and cooling system.

In order to solve the technical problems, the technical scheme provided by the utility model is that the flow battery cooling and heating system based on compressed air comprises a tray, wherein a circulating pump, a cooling and heating mechanism, a liquid storage tank and a galvanic pile support are arranged on the tray, electrolyte is stored in the liquid storage tank, and a galvanic pile communicated with the liquid storage tank is arranged on the galvanic pile support;

The circulating pump is communicated with electrolyte in the liquid storage tank through a filter, the circulating pump is communicated with the electric pile through a first pipeline, the electrolyte in the liquid storage tank is communicated with the electric pile through a second pipeline, a pressure gauge, a temperature sensor, a movable joint and a flow sensor are sequentially arranged on the first pipeline, and a manual ball valve is arranged on the second pipeline;

The cooling and heating mechanism is communicated with electrolyte in the liquid storage tank, the cooling and heating mechanism comprises a pressure switch valve capable of controlling compressed external air, the pressure switch valve is communicated with a vortex tube, the vortex tube is respectively communicated with two parallel manual switch valves in two directions, two of the manual switch valves are jointly communicated with an electric switch valve, the electric switch valve is communicated with a surrounding titanium tube arranged in the electrolyte, and the surrounding titanium tube is connected with a pressure sensor.

Compared with the prior art, the scheme has the remarkable advantages that:

The scheme solves the problems of poor system insulation performance, high power consumption and high manufacturing cost caused by the fact that the existing flow battery is cooled by adopting a water chiller and a plate heat exchanger and is heated by adopting a resistance wire or high-frequency induction heating. According to the cooling and heating system of the flow battery designed by the scheme, the same set of hardware system is adopted, so that the cooling of the flow battery can be realized, the heating of the flow battery can be realized under a low-temperature environment, and the space and the cost are greatly saved.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the composition of the present system;

FIG. 2 is a schematic diagram of the composition structure of the cooling and heating mechanism;

In the figure, a 1-tray, a 2-circulating pump, a 3-pressure gauge, a 4-temperature sensor, a 5-movable joint, a 6-flow sensor, a 7-manual ball valve, an 8-cooling and heating mechanism, a 9-liquid storage tank, a 10-galvanic pile bracket, a 11-galvanic pile, a 12-filter, a 801-pressure switching valve, a 802-vortex tube, a 803-804-805-806-manual switching valve, a 807-electric switching valve, a 901-pressure sensor, a 902-surrounding titanium tube and 903-electrolyte are arranged.

Detailed Description

The following description of preferred embodiments of the present utility model is provided in connection with the accompanying drawings, and it is to be understood that the preferred embodiments described herein are for the purpose of illustration and explanation only and are not intended to limit the utility model thereto.

As shown in fig. 1 and 2, the cooling and heating system of the flow battery based on compressed air of the present utility model comprises a tray 1, a circulating pump 2, a cooling and heating mechanism 8, a liquid storage tank 9 and a galvanic pile support 10 are arranged on the tray 1, electrolyte 903 is stored in the liquid storage tank 9, and a galvanic pile 11 communicated with the liquid storage tank 9 is arranged on the galvanic pile support 10.

Specifically, the circulating pump 2 is a magnetic pump, the liquid storage tank 9 is made of PP material, the horizontal inlet of the circulating pump 2 is communicated with electrolyte 903 in the liquid storage tank 9 through a 316L steel filter 12, the vertical outlet of the circulating pump 2 is communicated with the inlet of the electric pile 11 through a first pipeline, and the pressure gauge 3, the temperature sensor 4, the movable joint 5, the flow sensor 6 and the manual ball valve 7 are sequentially arranged on the first pipeline.

The operation method of the system comprises the following steps:

s1, the circulating pump 2 sucks electrolyte 903 out of the liquid storage tank 9, and the electrolyte 903 enters the electric pile 11 through a first pipeline to perform chemical reaction.

S2, when the electric pile 11 is charged, the electrolyte 903 in the liquid storage tank 9 is in a charged state, and when the electric pile 11 is discharged, the electrolyte 903 is in a power-off state and flows back to the liquid storage tank 9 from an outlet of the electric pile 11.

Because the chemical reaction on the electrode generates heat, the heat needs to be taken away in time, so the electrolyte 903 must be in a preset temperature range, and the cooling and heating mechanism 8 is required to cool the electrolyte. If the reservoir 9 is at an extremely low ambient temperature, the electrolyte 903 is too low to charge, and the electrolyte 903 needs to be heated to maintain it within a predetermined temperature range.

In addition, the pressure gauge 3 can be used for measuring the pipeline pressure, and can give an alarm in time when the pipeline is blocked. The temperature sensor 4 is used for measuring the temperature of the electrolyte 903, and when the temperature is higher or lower than a preset value, the cooling or heating operation is started in time. The flow sensor 6 is mainly used for measuring the flow of the pipeline and displaying the relationship between the flow and charge and discharge.

The cooling and heating mechanism 8 is in communication with the electrolyte 903 in the liquid storage tank 9, specifically, it includes a pressure switch valve 801 capable of controlling compressed external air, the pressure switch valve 801 is in communication with a vortex tube 802, the vortex tube 802 is in communication with two manual switch valves 803, 804, 805 and 806 respectively in two directions, as can be seen from the figure, the manual switch valves 803 and 804 are a group, 805 and 806 are a group, meanwhile, the manual switch valve 804 and the manual switch valve 805 are in common communication with an electric switch valve 807, the electric switch valve 807 is in communication with a surrounding titanium tube 902 disposed in the electrolyte 903, and the surrounding titanium tube 902 is connected with a pressure sensor 901.

The cooling and heating mechanism 8 has three working states:

In a high temperature state, the manual switching valves 803, 804, 805, and 806 are controlled to be opened and closed, at this time, compressed air flows into the vortex tube 802, cold air flows into the surrounding titanium tube 902 from the right end through the manual switching valve 805, and when the cold air pressure passes through the threshold value of the pressure sensor 901, the pressure switching valve 801 closes the compressed air, and simultaneously closes the electric switching valve 807, and the cold air in the surrounding titanium tube 902 and the surrounding electrolyte 903 exchange heat. After the heat is fully exchanged, the pressure is reduced, the compressed air is restarted, the cold air is sent into the surrounding titanium tube 902, and after the heat exchange is fully performed, the heated air is discharged to the outside far away from the flow battery, so that the effects of cooling and energy saving are achieved. Since the hot air at the left end of the vortex tube 802 is also discharged to the outside far from the flow cell through the manual switching valve 805, no pollution is generated.

In a low temperature state, the manual switch valves 803, 804 and 805 are controlled to be closed, and 806 are controlled to be opened, at this time, compressed air flows into the vortex tube 802, hot air flows into the surrounding titanium tube 902 from the left end through the manual switch valve 804, when the pressure of the hot air exceeds the threshold value of the pressure sensor 901, the pressure switch valve 801 closes the compressed air, and simultaneously the electric switch valve 807 is closed, hot air in the surrounding titanium tube 902 exchanges heat with surrounding electrolyte 903, after the heat is fully exchanged, the pressure is reduced, the compressed air is restarted, the hot air is sent into the surrounding titanium tube 902, cooled air is discharged to the outside far from the flow battery after the heat exchange is fully performed, and the effects of temperature rising and energy saving are achieved. The cold air at the right end of the vortex tube 802 is also discharged to the outside of the flow cell through the manual on-off valve 806 without any pollution.

At normal temperature, the temperature sensor 4 detects that the temperature of the electrolyte 903 is within a preset range, and the compressed air does not operate.

It should be noted that the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the foregoing embodiments, but may be modified or substituted for some of the features described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A liquid flow battery cooling and heating system based on compressed air, characterized in that the system comprises a tray, on which a circulation pump, a cooling and heating mechanism, a liquid storage tank and a battery stack support are arranged, wherein the liquid storage tank stores electrolyte, and the battery stack support is provided with a battery stack connected to the liquid storage tank;

The circulation pump is connected to the electrolyte in the liquid storage tank through a filter, the circulation pump is connected to the battery stack through a first pipeline, the electrolyte in the liquid storage tank is connected to the battery stack through a second pipeline, a pressure gauge, a temperature sensor, a flexible joint, a flow sensor, and a manual ball valve are sequentially arranged on the first pipeline, and a manual ball valve is also arranged on the second pipeline;

The cooling and heating mechanism is connected to the electrolyte in the liquid storage tank, and the cooling and heating mechanism includes a pressure switch valve capable of controlling compressed external air, the pressure switch valve is connected to a vortex tube, and the vortex tube is connected to two parallel manual switch valves in two directions respectively, wherein the two manual switch valves are commonly connected to an electric switch valve, and the electric switch valve is connected to a surrounding titanium tube arranged in the electrolyte, and the surrounding titanium tube is connected to a pressure sensor.