CN218975489U

CN218975489U - Multifunctional zinc bromine flow battery pile testing device

Info

Publication number: CN218975489U
Application number: CN202220451118.6U
Authority: CN
Inventors: 赵乾乾; 张少华; 赵坤坤
Original assignee: Nanjing Changsheng Energy Technology Co ltd
Current assignee: Nanjing Changsheng Energy Technology Co ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2023-05-05
Anticipated expiration: 2032-03-03

Abstract

The utility model discloses a multifunctional zinc-bromine flow battery pile testing device which comprises a control cabinet, a lower liquid storage tank, an upper liquid storage tank, a liquid circulation system, a pressure gauge, a flowmeter and a permeation measurer, wherein the lower liquid storage tank is connected with the lower liquid storage tank; the liquid circulation system is used for communicating the lower liquid storage tank with liquid inlets of all corresponding chambers of the electric pile, communicating the upper liquid storage tank with liquid outlets of all corresponding chambers of the electric pile, and forming a circulation passage between the lower liquid storage tank and the upper liquid storage tank; the pressure gauge and the flowmeter are connected in series in the liquid circulation system; the infiltration measurer is used for receiving and measuring the infiltrated liquid volume; the control cabinet comprises a cabinet body, a touch screen and a controller module; the liquid circulation system is driven and controlled by the controller module. The multifunctional zinc-bromine flow battery pile testing device can realize the functions of one machine with multiple functions by considering the tightness test, the flow characteristic test and the cross flow test, and provides a new scheme for the delivery test flow and the fault identification of the battery pile.

Description

Multifunctional zinc bromine flow battery pile testing device

Technical Field

The utility model relates to a cell stack testing device, in particular to a multifunctional zinc-bromine flow cell stack testing device.

Background

Energy storage is an indispensable support technology for smart power grids, renewable energy access, distributed power generation, micro-grids and electric automobile development. The operation of the Chinese power grid currently faces the challenges of continuous increase of the highest power load, expansion of the intermittent energy access proportion, limited peak regulation means and the like, and the high-quality, safe, clean, economical and interactive smart power grid is a set target of the Chinese power grid, and the energy storage technology, particularly the large-scale energy storage technology, has various advantages which can be widely applied to four links of power generation, power transmission, power distribution and power consumption. The energy storage link is taken as an indispensable joint link in the construction of the smart grid and is known as a fifth element of the smart grid. At present, new energy is continuously developed at a high speed, and an advanced energy storage technology can solve the fluctuation problem of new energy power generation to a great extent, so that stable output of new energy electric quantity can be realized, and power grid voltage, frequency, harmonic waves and other 'abnormal movements' caused by the online of the new energy electric quantity can be effectively regulated, so that wind power and solar power generation are safely integrated into a power grid in a large scale. Energy storage products therefore have tremendous market space. Based on engineering implementation, in terms of operation and maintenance, the energy storage needs a large-scale system with the energy storage time of more than 2 hours and within 10kwh-30MW, the power range of the zinc-bromine energy storage system is 20 kwh-20 MW level, and the energy storage time is more than 2 hours, so that the zinc-bromine energy storage system is one of the best energy storage modes.

Zinc bromine Flow energy storage batteries are a new, efficient electrochemical energy storage device, also known as Redox Flow energy storage batteries (Flow Redox cells). The electrolyte solution (energy storage medium) of the energy storage battery is stored in an electrolyte storage tank outside the battery, the anode and the cathode in the battery are separated into two mutually independent chambers (an anode side and a cathode side) by a microporous membrane, and when the battery works, the anode electrolyte and the cathode electrolyte are forced to circulate in a closed loop formed by the liquid storage tank and the battery by respective power pumps.

When in charging: zinc ions (Zn2+) in the electrolyte obtain 2 electrons at the anode of the battery, are reduced into zinc simple substance (Zn) and are plated on the anode plate; the cathode side bromine ions (Br-) lose electrons at the cathode of the cell and are oxidized into bromine simple substance (Br 2), meanwhile, the bromine simple substance is captured by a complex (MEP) in the solution to form a polybrominated complex (MEPBrn), and the polybrominated complex (MEPBrn) is deposited from the electrolyte and stored in a liquid storage tank outside the galvanic pile.

When discharging, the following steps are carried out: the zinc simple substance (Zn) deposited on the negative plate loses 2 electrons to generate zinc ions (Zn2+), and the zinc ions are dissolved in the electrolyte. At the same time, near the positive electrode, the complex enters the reaction zone where bromine is reduced, generating bromide ions (Br-). The active substances in the solution are continuously converted to each other by circulating and reciprocating in this way, so that the storage and application of electric energy are realized. Therefore, the zinc-bromine battery has the following remarkable characteristics:

(1) Safety and reliability: the reaction place and the storage place of the active substances of the battery are mutually independent, do not fire or explode, and have natural safety properties; (2) long service life: the service life of the system is 10-20 years, and the cycle life is more than 3000 times; (3) high energy density: the theoretical energy density of the battery can reach 435Wh/kg, and the actual energy density can reach 60Wh/kg; (4) simple electrolyte: the components of the positive and negative electrolyte are completely consistent, the cross contamination of the electrolyte does not exist, and the theoretical service life is unlimited; (5) ease of thermal management: the flow of electrolyte is beneficial to the thermal management of the battery system, which is difficult for the traditional battery; (6) deep discharge: can be deeply discharged by 100 percent, and has no influence on the performance and service life of the battery; and (7) the material is environment-friendly and easy to obtain: the main components of the used electrode and diaphragm materials are plastics, the materials do not contain heavy metals, the price is low, the materials can be recycled, and the materials are environment-friendly: (8) excellent economic performance: the overall cost of the system is low, and the system has good commercial application prospect; (9) flexible configuration: and the battery is in modularized design, the power and the capacity are mutually independent, and the on-site scheduling is flexible.

However, in the actual industrialization process, there are some problems in this technology, such as leakage of the galvanic pile. The leakage comprises external leakage and internal leakage, wherein the external leakage is that electrolyte inside the galvanic pile passes through a sealing surface and permeates outside the galvanic pile; the internal leakage refers to the mutual permeation of positive and negative electrolyte caused by the damage of a separation film and the like in the electric pile, so that the self-discharge rate of the battery is increased and even scrapped. Compared with external leakage, the internal leakage phenomenon is more hidden and is difficult to detect, so that the leakage detection of the battery is particularly important before the battery leaves the factory. In addition, when a plurality of zinc-bromine battery stacks are operated in parallel, the flow rate of electrolyte flowing through each stack is different due to the difference of the resistance characteristics of the stacks, and the fluid characteristic parameters of the stacks need to be quantitatively analyzed.

Disclosure of Invention

The utility model aims to: the multifunctional zinc-bromine flow battery pile testing device can detect leakage of a battery pile, so that reliability of the zinc-bromine flow battery pile is ensured.

The technical scheme is as follows: the utility model relates to a multifunctional zinc-bromine flow battery pile testing device which comprises a control cabinet, a lower liquid storage tank, an upper liquid storage tank, a liquid circulation system, a pressure gauge, a flowmeter and a permeation measurer, wherein the control cabinet is connected with the lower liquid storage tank; the installation height of the upper liquid storage tank is higher than that of the electric pile, and the installation height of the lower liquid storage tank is lower than that of the electric pile; the liquid circulation system is used for communicating the lower liquid storage tank with the liquid inlets of the corresponding chambers of the electric pile, communicating the upper liquid storage tank with the liquid outlets of the corresponding chambers of the electric pile, forming a circulation passage between the lower liquid storage tank and the upper liquid storage tank, and enabling the on-off states of the liquid inlets and the liquid outlets of the corresponding chambers of the electric pile to be respectively controllable; the pressure gauge and the flowmeter are connected in series in the liquid circulation system and are used for measuring the liquid pressure and the liquid flow at the corresponding positions; the infiltration measurer is communicated with the liquid outlet of each corresponding chamber of the galvanic pile and is used for receiving and measuring the infiltrated liquid volume; the control cabinet comprises a cabinet body, a touch screen and a controller module, wherein the touch screen is arranged at the top of the cabinet body, and the controller module is arranged in the cabinet body; the liquid circulation system is driven and controlled by the controller module, and the touch screen, the pressure gauge, the flowmeter and the permeation measurer are all electrically connected with the controller module.

Further, the liquid circulation system comprises a circulation pump, a branch pipeline, a permeate liquid pipeline and a transfusion pipeline; the flowmeter comprises a first flowmeter and a second flowmeter; the infiltration measurer comprises a first measurer and a second measurer; the overflow port of the upper liquid storage tank is communicated with the liquid inlet of the lower liquid storage tank through a liquid delivery pipeline, the liquid inlet of the upper liquid storage tank is communicated with the liquid outlet of the circulating pump through a liquid delivery pipeline, the liquid inlet of the circulating pump is communicated with the liquid outlet of the lower liquid storage tank through a liquid delivery pipeline, and the pressure gauge is arranged on the liquid delivery pipeline at the liquid outlet of the circulating pump; a first electric control valve is connected in series on the infusion pipeline at the liquid inlet of the upper liquid storage tank; the branch pipeline is communicated with the liquid outlet of the circulating pump, and a second electric control valve is connected in series at the inlet of the branch pipeline; the outlet of the branch pipeline is communicated with a transfusion pipeline which is used for being connected with a liquid inlet of the positive electrode cavity and a liquid inlet of the negative electrode cavity of the galvanic pile; the liquid outlet of the upper liquid storage tank is communicated with the branch pipeline through a liquid delivery pipeline, and a third electric control valve is connected in series on the liquid delivery pipeline at the liquid outlet of the upper liquid storage tank; the liquid inlet of the lower liquid storage tank is communicated with a liquid delivery pipeline which is communicated with the liquid outlet of the positive electrode cavity and the liquid outlet of the negative electrode cavity of the galvanic pile; the liquid inlet of the positive electrode cavity of the electric pile is connected with a liquid inlet of the negative electrode cavity of the electric pile, the liquid inlet of the positive electrode cavity of the electric pile is connected with a liquid outlet of the electric pile, the liquid outlet of the positive electrode cavity of the electric pile is connected with a liquid outlet of the electric pile, and the liquid outlet of the negative electrode cavity of the electric pile is connected with a liquid outlet of the electric pile; the first measurer is communicated with a liquid outlet of a cathode cavity of the galvanic pile through a permeate liquid pipeline, and an eighth electric control valve is connected in series on the permeate liquid pipeline at the inlet of the first measurer; the second measurer is communicated with a liquid outlet of the positive electrode cavity of the galvanic pile through a permeate liquid pipeline, and a ninth electric control valve is connected in series on the permeate liquid pipeline at the inlet of the second measurer; the circulating pump, the first flowmeter, the second flowmeter, the first measurer, the second measurer, the pressure gauge, the first electric control valve, the second electric control valve, the third electric control valve, the fourth electric control valve, the fifth electric control valve, the sixth electric control valve, the seventh electric control valve, the eighth electric control valve and the ninth electric control valve are all electrically connected with the controller module.

Further, the first measurer and the second measurer are both electronic measuring cups.

Further, the height difference between the height of the overflow port of the upper liquid storage tank and the central height of the electric pile is H, and the range of H is 2.8-4.2 meters.

Compared with the prior art, the utility model has the beneficial effects that: the pressure gauge and the flowmeter are connected in series in the liquid circulation system, so that the liquid pressure and the liquid flow at the corresponding positions can be measured, the flow resistance of the liquid of the galvanic pile and the permeation quantity of the diaphragm liquid during use can be judged, whether the galvanic pile is qualified or not can be rapidly judged, and the delivery qualification rate of the battery is ensured; the lower liquid storage tank, the electric pile and the upper liquid storage tank are respectively arranged at the upper, middle and lower height positions, so that natural and stable liquid flow can be formed through the liquid level height difference during use, and the reliability of the electric pile during test is ensured; a circulation passage is formed between the lower liquid storage tank and the upper liquid storage tank by utilizing a liquid circulation system, so that a stable liquid level difference is formed between the lower liquid storage tank and the galvanic pile during testing, and the stability of testing is ensured; the touch screen is utilized to facilitate the setting of the test process and the display of the test result, so that the convenience of the test is enhanced; the controller module can be utilized to coordinate and control the liquid circulation system, and test parameters of the pressure gauge, the flowmeter and the permeation measurer are obtained in real time, so that automatic testing is completed.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a testing device according to the present utility model;

FIG. 2 is a graph showing a standard resistance curve according to the present utility model;

FIG. 3 is a schematic representation of the permeation measurement results of the present utility model;

fig. 4 is a schematic view of a pile assembly structure according to the present utility model.

Detailed Description

The technical scheme of the present utility model will be described in detail with reference to the accompanying drawings, but the scope of the present utility model is not limited to the embodiments.

Example 1:

as shown in fig. 1, the multifunctional zinc-bromine flow battery pile testing device of the utility model comprises: the device comprises a control cabinet, a lower liquid storage tank 1, an upper liquid storage tank 6, a liquid circulation system, a pressure gauge 3, a flowmeter and a permeation measurer; the installation height of the upper liquid storage tank 6 is higher than that of the electric pile 10, and the installation height of the lower liquid storage tank 1 is lower than that of the electric pile 10; the liquid circulation system is used for communicating the lower liquid storage tank 1 with the liquid inlets of the corresponding chambers of the electric pile 10, communicating the upper liquid storage tank 6 with the liquid outlets of the corresponding chambers of the electric pile 10, forming a circulation passage between the lower liquid storage tank 1 and the upper liquid storage tank 6, and enabling the on-off states of the liquid inlets and the liquid outlets of the corresponding chambers of the electric pile 10 to be respectively controllable; the pressure gauge 3 and the flowmeter are connected in series in the liquid circulation system and are used for measuring the liquid pressure and the liquid flow at corresponding positions; the infiltration measurer is used for communicating with the liquid outlet of each corresponding chamber of the galvanic pile 10 and is used for receiving and measuring the infiltrated liquid volume; the control cabinet comprises a cabinet body, a touch screen and a controller module, wherein the touch screen is arranged at the top of the cabinet body, and the controller module is arranged in the cabinet body; the liquid circulation system is driven and controlled by the controller module, and the touch screen, the pressure gauge 3, the flowmeter and the permeation measurer are all electrically connected with the controller module.

The pressure gauge 3 and the flowmeter are connected in series in the liquid circulation system, so that the liquid pressure and the liquid flow at the corresponding positions can be measured, the flow resistance of the liquid of the electric pile 10 in use and the permeation quantity of the diaphragm liquid can be judged, whether the electric pile 10 is qualified or not can be rapidly judged, and the delivery qualification rate of the battery can be ensured; the lower liquid storage tank 1, the electric pile 10 and the upper liquid storage tank 6 are respectively arranged at the upper, middle and lower height positions, so that natural and stable liquid flow can be formed through the liquid level height difference during use, and the reliability of the electric pile 10 during test is ensured; a circulation passage is formed between the lower liquid storage tank 1 and the upper liquid storage tank 6 by utilizing a liquid circulation system, so that a stable liquid level difference is formed between the lower liquid storage tank 1 and the galvanic pile 10 during testing, and the stability of testing is ensured; the touch screen is utilized to facilitate the setting of the test process and the display of the test result, so that the convenience of the test is enhanced; the controller module can be used for carrying out coordinated control on the liquid circulation system and acquiring test parameters of the pressure gauge 3, the flowmeter and the permeation measurer in real time, so that automatic test is completed; the touch screen adopts an existing touch screen, and the controller module adopts an existing controller module, such as a PLC controller module.

Further, the liquid circulation system comprises a circulation pump 2, a branch pipeline, a permeate liquid pipeline and a transfusion pipeline; the flowmeter comprises a first flowmeter 15 and a second flowmeter 16; the infiltration measurer comprises a first measurer 13 and a second measurer 14; the overflow port of the upper liquid storage tank 6 is communicated with the liquid inlet of the lower liquid storage tank 1 through a liquid delivery pipeline, the liquid inlet of the upper liquid storage tank 6 is communicated with the liquid outlet of the circulating pump 2 through a liquid delivery pipeline, the liquid inlet of the circulating pump 2 is communicated with the liquid outlet of the lower liquid storage tank 1 through a liquid delivery pipeline, and the pressure gauge 3 is arranged on the liquid delivery pipeline at the liquid outlet of the circulating pump 2; a first electric control valve 4 is connected in series with a transfusion pipeline at the liquid inlet of the upper liquid storage tank 6; the branch pipeline is communicated with the liquid outlet of the circulating pump 2, and a second electric control valve 5 is connected in series at the inlet of the branch pipeline; the outlet of the branch pipe is communicated with a transfusion pipe which is used for being connected with the liquid inlet of the positive electrode cavity and the liquid inlet of the negative electrode cavity of the galvanic pile 10; the liquid outlet of the upper liquid storage tank 6 is communicated with the branch pipeline through a liquid delivery pipeline, and a third electric control valve 7 is connected in series on the liquid delivery pipeline at the liquid outlet of the upper liquid storage tank 6; the liquid inlet of the lower liquid storage tank 1 is communicated with a liquid delivery pipeline which is communicated with the liquid outlet of the positive electrode cavity and the liquid outlet of the negative electrode cavity of the electric pile 10; a fourth electric control valve 9 is connected in series with an infusion pipeline at the liquid inlet of the positive electrode cavity of the electric pile 10, a fifth electric control valve 8 is connected in series with an infusion pipeline at the liquid inlet of the negative electrode cavity of the electric pile 10, a sixth electric control valve 17 and a first flowmeter 15 are connected in series with an infusion pipeline at the liquid outlet of the positive electrode cavity of the electric pile 10, and a seventh electric control valve 18 and a second flowmeter 16 are connected in series with an infusion pipeline at the liquid outlet of the negative electrode cavity of the electric pile 10; the first measurer 13 is used for being communicated with a liquid outlet of a negative electrode cavity of the electric pile 10 through a permeate liquid pipeline, and an eighth electric control valve 12 is connected in series to the permeate liquid pipeline at the inlet of the first measurer 13; the second measurer 14 is used for being communicated with a liquid outlet of the positive electrode cavity of the galvanic pile 10 through a permeate liquid pipeline, and a ninth electric control valve 11 is connected in series on the permeate liquid pipeline at the inlet of the second measurer 14; the circulation pump 2, the first flowmeter 15, the second flowmeter 16, the first measurer 13, the second measurer 14, the pressure gauge 3, the first electric control valve 4, the second electric control valve 5, the third electric control valve 7, the fourth electric control valve 9, the fifth electric control valve 8, the sixth electric control valve 17, the seventh electric control valve 18, the eighth electric control valve 12 and the ninth electric control valve 11 are all electrically connected with the controller module.

The liquid circulation system can be switched to perform flow test and cross flow test by utilizing the matched arrangement of the first electric control valve 4, the second electric control valve 5, the third electric control valve 7, the fourth electric control valve 9, the fifth electric control valve 8, the sixth electric control valve 17, the seventh electric control valve 18, the eighth electric control valve 12 and the ninth electric control valve 11, so that the multifunctional test requirement is met; the controller module is used for carrying out coordinated control on each electric control valve, so that measurement can be automatically carried out, and the test efficiency is improved; the flow rates of the positive electrode and the negative electrode can be measured independently by the first flow meter 15 and the second flow meter 16, respectively, so that the reliability of the test is ensured; the first measurer 13 and the second measurer 14 can be used for respectively measuring the forward osmosis amount and the reverse osmosis amount, so as to judge whether the diaphragm is qualified or not; the first electric control valve 4, the second electric control valve 5, the third electric control valve 7, the fourth electric control valve 9, the fifth electric control valve 8, the sixth electric control valve 17, the seventh electric control valve 18, the eighth electric control valve 12 and the ninth electric control valve 11 all adopt existing electric control valves, the pressure gauge 3 adopts existing digital pressure gauges, and the first flowmeter 15 and the second flowmeter 16 all adopt existing digital flowmeters.

Further, the first measuring device 13 and the second measuring device 14 are both electronic measuring cups. The electronic measuring cup is used as the first measurer 13 and the second measurer 14, so that the permeation quantity of the electrolyte can be accurately detected, and the permeation quantity can be converted into digital parameters and sent to the controller module.

Further, the height difference between the overflow port height of the upper liquid storage tank 6 and the center height of the electric pile 10 is H, and the range of H is 2.8-4.2 meters. The set height difference H can meet the requirement of stabilizing the liquid pressure during testing, and the reliability of the forward and reverse cross testing is ensured.

The utility model relates to a multifunctional zinc bromine flow battery pile testing device, which comprises the following specific testing steps:

firstly, the liquid inlet and the liquid outlet of each corresponding chamber of the electric pile are communicated with corresponding pipelines, and then the controller module closes the first electric control valve 4, the third electric control valve 7, the ninth electric control valve 11 and the eighth electric control valve 12 and opens the second electric control valve 5, the fifth electric control valve 8, the fourth electric control valve 9, the sixth electric control valve 17 and the seventh electric control valve 18;

then, the controller module starts the circulating pump 2 to suck and pressurize the liquid in the lower liquid storage tank 1, the boosted liquid respectively enters the positive electrode cavity liquid inlet and the negative electrode cavity liquid inlet of the electric pile 10 through the fifth electric control valve 8 and the fourth electric control valve 9 after passing through the second electric control valve 5, and flows back to the lower liquid storage tank 1 through the sixth electric control valve 17 and the seventh electric control valve 18 after flowing out of the positive electrode cavity liquid outlet and the negative electrode cavity liquid outlet of the electric pile 10, and the pressure gauge 3, the first flowmeter 15 and the second flowmeter 16 respectively measure the liquid pressure value, the positive electrode flow value and the negative electrode flow value at corresponding positions of the circulating pump 2 under different output powers;

and finally, constructing an actually measured resistance curve by utilizing the corresponding groups of liquid pressure values, positive electrode flow values and negative electrode flow values under different output powers, comparing the actually measured resistance curve with a standard resistance curve, and if the actually measured resistance curve is positioned in a qualified pressure interval formed by the standard resistance curve, indicating that the flow test is qualified, otherwise, judging that the flow test is unqualified.

The utility model relates to a multifunctional zinc bromine flow battery pile testing device, which is used for preparing liquid level when carrying out forward cross flow test and reverse cross flow test, and comprises the following specific steps:

closing the second electric control valve 5, the third electric control valve 7, the fifth electric control valve 8, the fourth electric control valve 9, the ninth electric control valve 11, the eighth electric control valve 12, the sixth electric control valve 17 and the seventh electric control valve 18, opening the first electric control valve 4, restarting the circulating pump 2, sucking and pressurizing the liquid in the lower liquid storage tank 1, enabling the boosted liquid to enter the upper liquid storage tank 6 through the first electric control valve 4, enabling the liquid to flow out from the overflow port and enter the lower liquid storage tank 1 when the liquid level in the tank reaches the overflow port, and circularly maintaining the liquid level in the upper liquid storage tank 6 to be constant, and enabling the electric pile 10 to be positioned below the liquid level, so that the constant height difference H is maintained between the overflow port of the upper liquid storage tank 6 and the center of the electric pile 10;

then, forward cross flow test is carried out, and the specific steps are as follows:

opening the first electric control valve 4, the third electric control valve 7, the fourth electric control valve 9 and the eighth electric control valve 12, closing the second electric control valve 5 and the fifth electric control valve 8, feeding the liquid in the upper liquid storage tank 6 into the positive electrode cavity of the electric pile 10 after passing through the third electric control valve 7 and the fourth electric control valve 9, enabling the liquid to permeate into the negative electrode cavity from the positive electrode cavity through the microporous membrane under the action of pressure difference, enabling the liquid to flow out from the liquid outlet of the negative electrode cavity of the electric pile 10, enabling the liquid to flow into the first measurer 13 after passing through the eighth electric control valve 12, and measuring the volume of the liquid accumulated in the first measurer 13 within a certain time, thereby measuring and calculating the forward permeation quantity of the diaphragm liquid;

then, reverse crossing flow test is carried out, and the specific steps are as follows:

opening the first electric control valve 4, the third electric control valve 7, the fifth electric control valve 8 and the ninth electric control valve 11, closing the second electric control valve 5 and the fourth electric control valve 9, feeding the liquid in the upper liquid storage tank 6 into a negative electrode cavity of the electric pile 10 after passing through the third electric control valve 7 and the fifth electric control valve 8, enabling the liquid to permeate into a positive electrode cavity through a microporous membrane from the negative electrode cavity under the action of pressure difference, enabling the liquid to flow out from a liquid outlet of the positive electrode cavity of the electric pile 10, enabling the liquid to flow into the second measurer 14 after passing through the ninth electric control valve 11, and measuring the volume of the liquid accumulated in the second measurer 14 within a certain time, thereby measuring and calculating the reverse osmosis quantity of the diaphragm liquid; if the forward osmosis quantity and the reverse osmosis quantity are within the interval range of the osmosis qualified quantity, the forward cross flow test and the reverse cross flow test are qualified, otherwise, the forward cross flow test and the reverse cross flow test are unqualified, as shown in fig. 3.

By the pressurized circulation of the liquid inside the cell stack 10, it is possible to detect whether the liquid inside the cell permeates to the outside of the cell stack 10, thereby evaluating the sealing performance of the cell stack 10 against the electrolyte; by measuring the flow data of the positive electrolyte and the negative electrolyte of the stacks 10 under different pressures to obtain the fluid resistance characteristic data of each zinc-bromine battery stack, a quantitative basis can be provided for fluid consistency evaluation of each stack 10, and when the fluid resistance data of the stacks 10 are consistent, the flow of the electrolyte flowing through each stack 10 is constant, so that the fluid resistance of each stack 10 can be reflected through the flow, and the stacks 10 with consistent fluid resistance characteristics can be configured in a group as shown in fig. 4; the measured resistance curve is constructed by using the test result, so that the measured resistance curve is compared with a qualified pressure interval of a standard resistance curve, whether the flow test is qualified or not can be rapidly judged, and therefore the sealing performance of the electric pile 10 to electrolyte is rapidly judged; through the cross flow test, the permeation data of the electrolyte passing through the diaphragm under the constant pressure difference can be obtained, so that whether the battery pile has internal leakage risk or not is evaluated, the internal leakage risk of the pile 10 is eliminated, and the product delivery reliability is improved; the measured resistance curve and the standard resistance curve are both established in a rectangular coordinate system with a liquid pressure value and a liquid flow value as an abscissa and an ordinate respectively, as shown in fig. 2, the standard resistance curve is two boundary curves, a region between the two boundary curves is a qualified region, and a region outside the two boundary curves is a disqualified region. The result judgment is more visual in a mode of an image curve, and the test efficiency and reliability are improved.

As described above, although the present utility model has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the utility model itself. Various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A multifunctional zinc bromine flow battery pile testing device is characterized in that: comprises a control cabinet, a lower liquid storage tank (1), an upper liquid storage tank (6), a liquid circulation system, a pressure gauge (3), a flowmeter and a permeation measurer; the installation height of the upper liquid storage tank (6) is higher than that of the electric pile (10), and the installation height of the lower liquid storage tank (1) is lower than that of the electric pile (10); the liquid circulation system is used for communicating the lower liquid storage tank (1) with the liquid inlets of the corresponding chambers of the electric pile (10), communicating the upper liquid storage tank (6) with the liquid outlets of the corresponding chambers of the electric pile (10), forming a circulation passage between the lower liquid storage tank (1) and the upper liquid storage tank (6), and enabling the on-off states of the liquid inlets and the liquid outlets of the corresponding chambers of the electric pile (10) to be respectively controllable; the pressure gauge (3) and the flowmeter are connected in series in the liquid circulation system and are used for measuring the liquid pressure and the liquid flow at corresponding positions; the infiltration measurer is used for communicating with the liquid outlet of each corresponding chamber of the galvanic pile (10) and is used for receiving and measuring the infiltrated liquid volume; the control cabinet comprises a cabinet body, a touch screen and a controller module, wherein the touch screen is arranged at the top of the cabinet body, and the controller module is arranged in the cabinet body; the liquid circulation system is driven and controlled by the controller module, and the touch screen, the pressure gauge (3), the flowmeter and the permeation measurer are all electrically connected with the controller module.

2. The multifunctional zinc-bromine flow battery pile testing device according to claim 1, wherein: the liquid circulation system comprises a circulation pump (2), a branch pipeline, a permeate liquid pipeline and a transfusion pipeline; the flowmeter comprises a first flowmeter (15) and a second flowmeter (16); the infiltration measuring device comprises a first measuring device (13) and a second measuring device (14); the overflow port of the upper liquid storage tank (6) is communicated with the liquid inlet of the lower liquid storage tank (1) through a liquid conveying pipeline, the liquid inlet of the upper liquid storage tank (6) is communicated with the liquid outlet of the circulating pump (2) through a liquid conveying pipeline, the liquid inlet of the circulating pump (2) is communicated with the liquid outlet of the lower liquid storage tank (1) through a liquid conveying pipeline, and the pressure gauge (3) is arranged on the liquid conveying pipeline at the liquid outlet of the circulating pump (2); a first electric control valve (4) is connected in series on an infusion pipeline at the liquid inlet of the upper liquid storage tank (6); the branch pipeline is communicated with a liquid outlet of the circulating pump (2), and a second electric control valve (5) is connected in series at an inlet of the branch pipeline; the outlet of the branch pipeline is communicated with a transfusion pipeline which is used for being connected with a liquid inlet of the positive electrode cavity and a liquid inlet of the negative electrode cavity of the galvanic pile (10); the liquid outlet of the upper liquid storage tank (6) is communicated with the branch pipeline through a liquid delivery pipeline, and a third electric control valve (7) is connected in series on the liquid delivery pipeline at the liquid outlet of the upper liquid storage tank (6); the liquid inlet of the lower liquid storage tank (1) is communicated with a liquid delivery pipeline which is communicated with the liquid outlet of the positive electrode cavity and the liquid outlet of the negative electrode cavity of the galvanic pile (10); a fourth electric control valve (9) is connected in series to the infusion pipeline at the liquid inlet of the positive electrode cavity of the electric pile (10), a fifth electric control valve (8) is connected in series to the infusion pipeline at the liquid inlet of the negative electrode cavity of the electric pile (10), a sixth electric control valve (17) and a first flowmeter (15) are connected in series to the infusion pipeline at the liquid outlet of the positive electrode cavity of the electric pile (10), and a seventh electric control valve (18) and a second flowmeter (16) are connected in series to the infusion pipeline at the liquid outlet of the negative electrode cavity of the electric pile (10); the first measurer (13) is communicated with a liquid outlet of a negative electrode cavity of the galvanic pile (10) through a permeate liquid pipeline, and an eighth electric control valve (12) is connected in series on the permeate liquid pipeline at the inlet of the first measurer (13); the second measurer (14) is communicated with a liquid outlet of the positive electrode cavity of the galvanic pile (10) through a permeate liquid pipeline, and a ninth electric control valve (11) is connected in series on the permeate liquid pipeline at the inlet of the second measurer (14); the circulating pump (2), the first flowmeter (15), the second flowmeter (16), the first measurer (13), the second measurer (14), the pressure gauge (3), the first electric control valve (4), the second electric control valve (5), the third electric control valve (7), the fourth electric control valve (9), the fifth electric control valve (8), the sixth electric control valve (17), the seventh electric control valve (18), the eighth electric control valve (12) and the ninth electric control valve (11) are all electrically connected with the controller module.

3. The multifunctional zinc-bromine flow battery pile testing device according to claim 2, characterized in that: the first measurer (13) and the second measurer (14) are both electronic measuring cups.

4. The multifunctional zinc-bromine flow battery pile testing device according to claim 1, wherein: the height difference between the overflow port height of the upper liquid storage tank (6) and the central height of the electric pile (10) is H, and the range of H is 2.8-4.2 meters.