CN117686160A - Leakage detection and collection method for electric pile of flow battery energy storage system - Google Patents
Leakage detection and collection method for electric pile of flow battery energy storage system Download PDFInfo
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- CN117686160A CN117686160A CN202311699526.9A CN202311699526A CN117686160A CN 117686160 A CN117686160 A CN 117686160A CN 202311699526 A CN202311699526 A CN 202311699526A CN 117686160 A CN117686160 A CN 117686160A
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- 238000001514 detection method Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 238000004891 communication Methods 0.000 claims abstract description 12
- 239000003792 electrolyte Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
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- 229910052720 vanadium Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000012466 permeate Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the technical field of liquid leakage detection of a flow battery energy storage system, and discloses a liquid leakage detection and collection method of a flow battery energy storage system electric pile, which comprises the following steps: placing and fixing the electric stacks on a support bracket and numbering a plurality of electric stacks; step two: selecting a proper liquid receiving disc and numbering, and placing the liquid receiving disc below a galvanic pile corresponding to the numbering; step three: branch flow pipes and main collecting pipes are arranged, each liquid receiving disc is connected with a branch flow pipe, and liquid outlet ends of the branch flow pipes are communicated with the main collecting pipes; step four: a liquid leakage detection device is arranged in the liquid receiving disc and is in communication connection with the detection module; step five: the detection module is respectively in communication connection with the alarm device and the main switch of the electric pile. The pile leakage detection method is safe and reliable, does not influence the normal operation of the pile, does not cause any damage to the pile, does not need frequent detection, has high practicability, saves detection programs and workload, and is environment-friendly and equipment-friendly.
Description
Technical Field
The invention relates to the technical field of liquid leakage detection of a flow battery energy storage system, in particular to a liquid leakage detection and collection method of a pile of the flow battery energy storage system.
Background
The flow battery energy storage system is a device for realizing the mutual conversion of electric energy and chemical energy by using electrolyte of ions in different valence states, has the advantages of safety, reliability, convenient use and environmental friendliness, and has become a new energy storage technology with great development gradually. The flow battery pile is a component for realizing the mutual conversion of electric energy and chemical energy by charge and discharge reaction, is a core component of the flow battery energy storage system, and the performance and reliability of the pile directly influence the performance and reliability of the flow battery energy storage system. The risk of leakage exists in the flow battery pile all the time, one of the reasons is that the pile components are mostly encapsulated by engineering plastics, and the encapsulation layers can be aged gradually along with the time, so that the pile has the risk of leakage; secondly, electrolyte is filled into the pile after being subjected to the pressure of the pump, and the electrolyte can permeate into all gaps of the pile under the pressure of the pump, so that the pile can have leakage risk if the pile is not tightly sealed in the production and assembly process; and thirdly, most of electrolyte has strong corrosiveness and strong oxidizing property, the galvanic pile is locked by high pressure in the assembling process, and the temperature is changed continuously in the charging and discharging process of the galvanic pile, so that the assembling materials are easy to expand with heat and contract with cold, and the galvanic pile is at risk of liquid leakage after the system is operated. The leakage of the galvanic pile is caused by various reasons, which can not be overcome completely technically at present, so that timely detection, discovery and maintenance after the leakage become the preference for ensuring the safety of the system.
The traditional flow battery energy storage system detects the mode of electric pile weeping: some are additionally provided with gas detectors, the gas concentration of the electrolyte volatilized by the energy storage battery in the corresponding battery box is detected by the gas detectors, so as to infer whether the electrolyte leaks or not, and then the machine is stopped for processing faults; some adopt the way to detect the air tightness of the pipeline to detect whether there is leakage, for example the Chinese patent of the disclosure number CN 106910919B, name all vanadium redox flow battery energy storage system galvanic pile electrolyte leak-proof automatic detection method; still other ways of detecting pressure changes by introducing gas are disclosed in chinese patent publication No. CN 106935888A, entitled leak-proof detection system and method for electrolyte in a cell stack of an energy storage system of an all-vanadium redox flow battery. The detection mode of the gas detector is limited by the precision and the reliability of the gas detector on one hand, and electrolyte is collected and treatment is delayed after liquid leakage is found on the other hand; the operation of the electric pile is required to be stopped by adopting the air tightness detection of the pipeline, so that the normal operation of the electric pile is influenced, and each part of the pipeline is required to be checked, so that the workload is huge; the pressure detection is carried out by adopting the gas, the pile can be detected only after the operation is stopped, the gas pressure is difficult to control, the pipeline is easily damaged when the gas pressure is too large, and the damaged part is not easily found when the gas pressure is too small; in addition, these detection methods are required to be performed frequently, and not only the leaked electrolyte cannot be collected, but also the operability is low.
Disclosure of Invention
The invention provides a leakage detection and collection method of a pile of a flow battery energy storage system, which solves the problem of poor applicability of the existing pile leakage detection technology.
The leakage detection and collection method of the cell stack of the flow battery energy storage system comprises the following steps:
step one: placing and fixing the electric stacks on a support bracket and numbering a plurality of electric stacks;
step two: selecting a proper liquid receiving disc according to the size and shape of the electric pile, numbering the liquid receiving disc, placing the liquid receiving disc below the electric pile corresponding to the number, and ensuring that the electric pile is in the liquid receiving range of the liquid receiving disc;
step three: branch flow pipes and main collecting pipes are arranged, each liquid receiving disc is connected with a branch flow pipe, liquid outlet ends of the branch flow pipes are communicated with the main collecting pipes, and the tail ends of the main collecting pipes are connected with collecting barrels for collecting electrolyte;
step four: a liquid leakage detection device is arranged in the liquid receiving disc and is in communication connection with the detection module;
step five: the detection module is respectively in communication connection with the alarm device and the main switch of the electric pile.
The beneficial effect of adopting above-mentioned technical scheme: according to the leakage detection mode, the liquid receiving disc is arranged below each pile, the leakage detection device is arranged in the liquid receiving disc, after the pile leaks, the leakage detection device directly alarms and notifies through an alarm, meanwhile, the main switch of the pile is disconnected, further leakage is avoided, the detection method does not influence the normal operation of the pile, only the pile is stopped after leakage occurs, the use efficiency of the pile is improved, and the pile is not damaged by the detection mode; in addition, be connected with branch flow pipe on the liquid receiving dish, branch flow pipe and main collecting pipe intercommunication, electrolyte can not flow outside after the electric pile takes place the weeping, carries out recovery use after unifying the collection, both can reduce the wasting of resources, also avoid environmental pollution.
Further, the number of the liquid receiving disc in the second step is consistent with the number of the upper electric pile.
The beneficial effect of adopting above-mentioned technical scheme: when the number of the liquid receiving disc is consistent with the number of the electric pile, when the electric pile leaks at a certain place, the leaked electric pile can be quickly found through the broadcasted number, and the processing speed is improved.
Further, the support bracket is formed by processing a high-strength aluminum alloy square tube, and is provided with a screw hole which is assembled and connected with a bolt in a matching way.
Further, the alarm device is an alarm bell, the alarm bell is connected with the signal receiver, and the signal receiver is in communication connection with the detection module.
Further, the detection module is a PLC module.
Further, the leakage detection device is composed of a detector, a non-conductive block and metal contacts arranged on two sides of the non-conductive block, wherein the metal contacts are connected with the detector through BVR wires.
Further, the liquid leakage detection device is a liquid leakage detection sensor.
Further, the plurality of stacks and the support bracket and the liquid receiving disc are all arranged inside the container body.
Further, a PCS control cabinet and a PLC control cabinet are arranged in the container body.
The invention has the following beneficial effects:
(1) The detection module of the pile leakage detection method adopts the PLC module, is connected with the alarm device and the main switch of the pile, and can quickly give an alarm and disconnect the main switch to stop when the pile is leaked, so as to protect the pile and ensure the safety of the flow battery energy storage system.
(2) The pile leakage detection method provided by the invention does not influence the normal operation of the pile, does not cause any damage to the pile, does not need frequent detection, has high practicability, and saves detection procedures and workload.
(3) The method for detecting the leakage of the galvanic pile is safe and reliable, the leakage detection device is sensitive in reaction, and the rapid treatment after the leakage detection can be realized.
(4) The pile leakage detection device is provided with the liquid receiving disc and the collecting barrel, and is used for collecting leaked electrolyte, so that equipment can be protected, and environmental pollution can be avoided.
Drawings
Fig. 1 is a schematic block diagram of a coupling system of the present invention.
In the figure: 1-pile; 2-a liquid receiving disc; 3-branch flow pipe; 4-a main header; 5-a collecting barrel; 6-container body; 7-PCS control cabinet; 8-PLC control cabinet.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Referring to fig. 1, the invention provides a leakage detection and collection method of a cell stack of a flow battery energy storage system, which comprises the following steps:
step one: placing and fixing the electric pile 1 on a support bracket and numbering a plurality of electric piles 1;
step two: selecting a proper liquid receiving disc 2 according to the size and shape of the electric pile 1, numbering the liquid receiving disc 2, placing the liquid receiving disc 2 below the electric pile 1 corresponding to the number, and ensuring that the electric pile 1 is in the liquid receiving range of the liquid receiving disc 2;
step three: the branch pipes 3 and the main collecting pipes 4 are arranged, each liquid receiving tray 2 is connected with the branch pipe 3, liquid outlet ends of the branch pipes 3 are communicated with the main collecting pipes 4, and the tail end of the main collecting pipe 4 is connected with a collecting barrel 5 for collecting electrolyte;
step four: a liquid leakage detection device is arranged in the liquid receiving disc 2 and is in communication connection with the detection module;
step five: the detection module is respectively connected with the alarm device and the main switch of the electric pile 1 in a communication way.
The alarm device is an alarm bell, the alarm bell is connected with the signal receiver, and the signal receiver is in communication connection with the detection module; when the liquid leakage detection device detects liquid leakage, signals are transmitted to the detection module, the detection module transmits the signals to the signal receiver, and the signal receiver decodes the signals and then enables the alarm device to warn and broadcast.
According to a preferred embodiment, the detection module is a PLC module programmed to implement signal receiving, analyzing, processing and transmitting, the above functions can be easily implemented by the existing programming technology, and the execution program part is regarded as the existing technology, which is not described herein.
The leakage detection device consists of a detector, a non-conductive block and two metal contacts arranged on two sides of the non-conductive block, wherein the two metal contacts are connected with the detector through BVR wires, after leakage occurs in the galvanic pile 1, the electrolyte conducts the two metal contacts, the whole device is short-circuited, and a short-circuit signal is transmitted to the detection module. The BVR wire is a special flexible wire for a power distribution cabinet, is an insulated flexible wire of copper core polyvinyl chloride, has good flexibility, and is suitable for wiring in a complex environment where the electric pile 1 is located.
Of course, the leakage detection device can also select a leakage detection sensor, and the leakage detection sensor is in communication connection with the detection module, and it should be noted that the accuracy and reliability of the leakage detection sensor are required to be higher.
In order to improve detection precision and efficiency, a leakage detection device or a leakage detection sensor is arranged at the lowest point of the liquid receiving disc 2, when electrolyte leakage occurs in the galvanic pile 1, electrolyte drops fall in the liquid receiving disc 2 and flow to the lowest point of the liquid receiving disc 2, and the leakage detection device or the leakage detection sensor can rapidly and accurately realize leakage detection.
According to a preferred embodiment, in the second step, the number of the liquid receiving disc 2 is consistent with the number of the upper electric pile 1, for example, the number of the electric pile 1 is AA, the number of the liquid receiving disc 2 is AA, and after the electric pile 1 leaks, the alarm device alerts the number of the liquid receiving disc 2 to be directly broadcasted, so that maintenance personnel can quickly position the electric pile 1 to leak according to the number of the liquid receiving disc 2, and quick processing is realized.
The bottom surface of the liquid receiving disc 2 is an inclined plane, the lowest point is arranged at the center of the liquid receiving disc, the electrolyte is favorably guided to the lowest point, a through hole is formed near the lowest point, the lower end of the through hole is connected with a branch pipe 3, the electrolyte is conveniently discharged, and the branch pipe 3 is in a closed state during detection.
The liquid receiving tray 2, the branch pipe 3 and the main collecting pipe 4 are made of materials which are corrosion resistant and do not react with electrolyte.
The support bracket in the first step is formed by processing a high-strength aluminum alloy square tube, a screw hole is formed in the support bracket, and the support bracket is assembled into a bracket for placing the electric pile 1 through lap joint of bolts or screws, so that the electric pile 1 has a certain height from the ground. Of course, the support bracket can also be made of any other suitable material, such as a high-strength plastic bracket or an angle steel frame, and can be used for safely placing the bracket of the electric pile 1.
For unified management, the stacks 1, the support brackets and the liquid receiving disc 2 are all arranged inside the container body 6, so that the stacks 1 in different areas can be well distinguished, and the stacks 1 can be protected.
A PCS control cabinet 7 and a PLC control cabinet 8 are arranged in the container body 6, and the PCS control cabinet 7 is a common electrical control cabinet and is used for connecting and wiring each electric pile 1; the PLC control cabinet 8 is used for setting detection module components, realizes independent opening and closing of the single container body 6, and does not influence the operation of the electric pile 1 in other container bodies 6.
According to the pile leakage detection method, when the pile 1 leaks, an alarm can be sent out quickly, and the main switch is disconnected to stop, so that the pile 1 is protected, and the safety of the flow battery energy storage system is ensured; the normal operation of the electric pile 1 is not affected in the normal waiting period, any damage to the electric pile 1 is not caused, frequent detection is not needed, and the practicability is high. The liquid receiving disc 2 and the collecting barrel 5 are arranged for collecting leaked electrolyte, so that equipment can be protected, and environmental pollution can be avoided.
The foregoing is merely a preferred embodiment of the invention, which is not representative of all possible forms of the invention, and the scope of the invention is not limited to such specific statements and embodiments. Various other modifications and improvements can be made in light of the teachings of the present disclosure without departing from the spirit and scope of the invention.
Claims (9)
1. The leakage detection and collection method of the flow battery energy storage system pile is characterized by comprising the following steps of:
step one: placing and fixing the electric pile (1) on a support bracket and numbering a plurality of electric piles (1);
step two: selecting a proper liquid receiving disc (2) according to the size and shape of the electric pile (1) and numbering the liquid receiving disc (2), placing the liquid receiving disc (2) below the electric pile (1) corresponding to the number, and ensuring that the electric pile (1) is in the liquid receiving range of the liquid receiving disc (2);
step three: a branch flow pipe (3) and a main flow collecting pipe (4) are arranged, each liquid receiving disc (2) is connected with the branch flow pipe (3), liquid outlet ends of a plurality of branch flow pipes (3) are communicated with the main flow collecting pipe (4), and the tail end of the main flow collecting pipe (4) is connected with a collecting barrel (5) for collecting electrolyte;
step four: a liquid leakage detection device is arranged in the liquid receiving disc (2), and the liquid leakage detection device is in communication connection with the detection module;
step five: the detection module is respectively connected with the alarm device and the main switch of the electric pile (1) in a communication way.
2. The method for detecting and collecting leakage of a cell stack of a flow battery energy storage system according to claim 1, wherein the method comprises the following steps: and in the second step, the number of the liquid receiving disc (2) is consistent with the number of the upper electric pile (1).
3. The method for detecting and collecting leakage of a cell stack of a flow battery energy storage system according to claim 1, wherein the method comprises the following steps: the support bracket is formed by processing a high-strength aluminum alloy square tube, and is provided with a screw hole which is assembled and connected with a bolt and a screw.
4. The method for detecting and collecting leakage of a cell stack of a flow battery energy storage system according to claim 1, wherein the method comprises the following steps: the alarm device is an alarm bell, the alarm bell is connected with the signal receiver, and the signal receiver is in communication connection with the detection module.
5. The method for detecting and collecting leakage of a cell stack of a flow battery energy storage system according to claim 1, wherein the method comprises the following steps: the detection module is a PLC module.
6. The method for detecting and collecting leakage of a cell stack of a flow battery energy storage system according to claim 1, wherein the method comprises the following steps: the leakage detection device is composed of a detector, a non-conductive block and metal contacts arranged on two sides of the non-conductive block, wherein the metal contacts are connected with the detector through BVR wires.
7. The method for detecting and collecting leakage of a cell stack of a flow battery energy storage system according to claim 1, wherein the method comprises the following steps: the liquid leakage detection device is a liquid leakage detection sensor.
8. The liquid leakage detection and collection method of the flow battery energy storage system stack according to any one of claims 1 to 7, wherein the method comprises the following steps: the plurality of galvanic piles (1), the supporting brackets and the liquid receiving disc (2) are all arranged inside the container body (6).
9. The method for detecting and collecting leakage of a cell stack of a flow battery energy storage system according to claim 8, wherein the method comprises the following steps: the container body (6) is internally provided with a PCS control cabinet (7) and a PLC control cabinet (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311699526.9A CN117686160A (en) | 2023-12-08 | 2023-12-08 | Leakage detection and collection method for electric pile of flow battery energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311699526.9A CN117686160A (en) | 2023-12-08 | 2023-12-08 | Leakage detection and collection method for electric pile of flow battery energy storage system |
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| CN117686160A true CN117686160A (en) | 2024-03-12 |
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| CN202311699526.9A Pending CN117686160A (en) | 2023-12-08 | 2023-12-08 | Leakage detection and collection method for electric pile of flow battery energy storage system |
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- 2023-12-08 CN CN202311699526.9A patent/CN117686160A/en active Pending
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