Liquid leakage monitoring device for liquid flow pile
By designing a belt-shaped liquid leakage sensor and independent data cable connection, the problem of small coverage of the liquid flow stack leakage monitoring system is solved, and accurate monitoring of key areas and easily leaky parts is achieved, which improves the sensitivity of the system.
Patent Information
- Application Number
- CN202422239728.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing liquid flow stack leakage monitoring system has a small coverage range, and the number of sensor controller channels is limited, making it difficult to expand the detection range.
A strip-shaped liquid leakage sensor is adopted, including a baseband made of flexible insulating material and adjacent strip-shaped metal electrodes. Some sensors are wound into a ring, arranged along the edge of the box, and an independent data line is connected to the sensor controller to expand the monitoring range.
It effectively expands the scope of fluid leakage monitoring, improves the system's sensitivity and detection coverage, and can accurately monitor key areas and areas prone to leakage.
Smart Images
Figure CN223138928U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flow batteries, in particular to a leakage monitoring device for flow batteries. Background Art
[0002] A flow battery is a new type of storage battery. A flow battery is composed of battery units, electrolytes, an electrolyte storage and supply unit, a management and control unit, etc. It is a high-performance storage battery that separates the positive and negative electrolytes and circulates them separately, and has the characteristics of high capacity, wide application fields (environments), and long cycle service life.
[0003] The positive and negative electrolyte storage tanks of the flow battery are huge in volume, with many pipelines and cables, and the overall structure is complex. Generally, an outer shell is set to encapsulate the entire flow battery. At the same time, a temperature regulation system, a pressure pump, and various sensors are also encapsulated to form a complete set of flow battery systems.
[0004] Among them, the leakage monitoring system is an important part to ensure the normal operation of the flow battery. The traditional leakage monitoring system generally includes a leakage sensor and a sensor controller. The leakage sensor is generally in the form of a probe or a patch. By setting the leakage sensor at a specific position, it can be detected whether there is a leakage phenomenon at that position. The disadvantage of this detection method is that the coverage range is small. For a point-detection leakage sensor to expand the detection range, only the number of leakage sensors can be simply increased. However, the number of channels of the sensor controller is limited, and the sensor controller can only drive a limited number of leakage sensors. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the problem of the small coverage range of the existing leakage monitoring system, and provides a leakage monitoring device for flow batteries, including a sensor controller, a plurality of leakage sensors, and a data line connecting the sensor controller and the leakage sensors;
[0006] The leakage sensor is in a strip shape, including a baseband made of a flexible insulating material. An identification band is arranged on the surface of the baseband. The identification band includes two adjacent strip-shaped metal electrodes, and a gap is reserved between the two electrodes; the electrodes are electrically connected to the data line;
[0007] Part of the leakage sensors are wound into a ring and sleeved on the pipeline joints of the flow battery;
[0008] Part of the leakage pressure sensors are arranged along the edge of the bottom of the box body;
[0009] Each leakage sensor is independently arranged and connected to the sensor controller through a separate data line.
[0010] In some embodiments, the baseband of the leakage sensor is made of a polymer plastic material.
[0011] In some embodiments, the liquid leakage sensor includes a combination of a baseband and electrodes. The baseband is cut to any length, and the electrodes on the baseband are soldered to the data line.
[0012] In some embodiments, two identification bands are provided on the surface of the baseband, and each identification band includes two adjacent strip-shaped metal electrodes.
[0013] In some embodiments, the data line includes two positive and negative wires, and one wire is connected to one metal electrode on each of the two identification bands simultaneously.
[0014] In some embodiments, a corrosion-resistant protective layer is provided on the surface of the metal electrode, and the corrosion-resistant protective layer is a conductor.
[0015] Applying the above technical solution of the present utility model to a liquid flow stack liquid leakage monitoring device has the following effects:
[0016] The system effectively expands the monitoring range of the sensor through the strip-shaped liquid leakage sensor. The strip-shaped sensor is relatively soft and can be bent at will. Therefore, the sensor can be bent into a ring and arranged at the joint of the liquid pipeline of the stack where liquid leakage is most likely to occur, and at the edge of the bottom of the box where liquid leakage is most likely to accumulate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of a connection relationship of the present utility model;
[0018] Figure 2 is a schematic diagram of the liquid leakage sensor itself in the present utility model;
[0019] Figure 3 is a schematic diagram of the structure of the liquid leakage sensor.
[0020] DESCRIPTION OF THE REFERENCE NUMERALS
[0021] 1 - Sensor controller; 2 - Data line, 3 - Liquid leakage sensor, 3a - Baseband, 3b - Electrode. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0023] The present utility model provides a liquid flow stack liquid leakage monitoring device, including a sensor controller 1, a plurality of liquid leakage sensors 3, and a data line 2 connecting the sensor controller 1 and the liquid leakage sensors 3.
[0024] As Figure 1As shown in the figure, the sensor controller 1 is an embedded single-chip microcomputer, which is responsible for controlling and driving the liquid leakage sensor 3, and at the same time processing the electrical signal of the liquid leakage sensor 3 and transmitting it back to the battery management system BMS in a serial manner. The sensor controller 1 is equipped with multiple groups of pins for connecting the liquid leakage sensor 3. The sensor controller 1 drives and controls multiple liquid leakage sensors 3 in parallel. When the liquid leakage sensor 3 detects the occurrence of liquid leakage, it transmits the electrical signal to the corresponding pins of the sensor controller 1 through the data line 2, and then the sensor controller 1 processes it and sends it to the BMS in the form of data. Since the sensor controller 1 controls the liquid leakage sensor 3 in parallel, the number of liquid leakage sensors 3 that can be controlled depends on the number of physical pins reserved for this type of sensor controller 1. Common sensor controllers 1 have 8 - 24 pins, and it is very difficult to increase the number of physical pins. In the prior art, using point collection of the liquid leakage sensor 3 can only monitor 8 - 24 point targets in the stack.
[0025] In this application, as Figure 2 and Figure 3 shown, the liquid leakage sensor 3 is in a strip shape. Any point of the strip-shaped liquid leakage sensor 3 with liquid leakage will trigger the liquid leakage sensor 3. Specifically, it includes a baseband 3a made of a flexible insulating material, and an identification band is arranged on the surface of the baseband 3a. The identification band includes two adjacent strip-shaped metal electrodes 3b, and a gap is reserved between the two electrodes 3b. The electrode 3b is electrically connected to the data line 2.
[0026] As Figure 3 shown, the function of the baseband 3a is to serve as an installation base for installing the metal electrode 3b, and the baseband 3a is used to support and protect the metal electrode 3b. The baseband 3a needs to be made of an insulating material, soft and easy to bend and deform, and no specific requirements are made for the specific material. For example, it can be an elastic polymer plastic or a rubber material, etc. The metal electrode 3b can be distributed only on one side of the baseband 3a, or on both sides. The metal electrode 3b is distributed along the extending direction of the baseband 3a. The root of the metal electrode 3b is buried and fixed in the baseband 3a, and the top of the metal electrode 3b extends outside the baseband 3a. The metal electrode 3b is generally made of copper, or a zinc electrode 3b can also be used. The identification band includes two metal electrodes 3b that are close to each other. A gap is reserved between the two metal electrodes 3b, and one of the two metal electrodes 3b maintains a high potential and the other is at a low potential. When there is leaked liquid at any position between the two electrodes 3b, the two metal electrodes 3b are conducted, thereby pulling up the metal electrode 3b at the low potential. A potential trigger is arranged between the metal electrode 3b at the low potential and the pin of the sensor controller 1. The metal electrode 3b at the low potential is electrically connected to the input end of the potential trigger, and the output end of the potential trigger is connected to the sensor controller 1.
[0027] In this application, the liquid leakage sensor 3 is set to be strip-shaped to expand the monitoring range. However, it is still impossible to monitor the entire fuel cell stack, and only the key areas can be detected for liquid leakage.
[0028] In this application, part of the liquid leakage sensor 3 is wound into a loop and sleeved at the joint of the liquid flow fuel cell stack pipeline. At the same time, part of the pressure leakage sensor 3 is arranged along the edge of the bottom of the box body; part of the liquid leakage sensor 3 can also be set on the surface of the liquid flow fuel cell stack and the surface of the electrolyte storage tank. Preferably, the liquid leakage sensor 3 is arranged along the four sides of the bottom of the fuel cell stack, and the liquid leakage sensor 3 is arranged around the bottom of the electrolyte storage tank.
[0029] Each liquid leakage sensor 3 is independently set and connected to the sensor controller 1 through a separate data line 2. The sensor controller 1 can determine the location of the liquid leakage according to the specific trigger pin.
[0030] The sensor controller 1 includes a plurality of input ports. Each input port corresponds to a liquid leakage sensor 3 separately. According to the location of the liquid leakage sensor 3, warning data of different levels are fed back to the management system of the liquid flow fuel cell stack. One end of the liquid leakage sensor 3 is provided with a connector, and a socket adapted to the connector is arranged on the data line 2. The liquid leakage sensor 3 is a flat belt structure. The baseband 3a itself can be bent and wound. Metal electrodes 3b for actually detecting liquid leakage are arranged on the baseband 3a. One of the metal electrodes 3b is pulled to a high potential, and the other remains at a low potential. If there is liquid leakage, the low potential will rise, and then the electrical signal is transmitted to the sensor controller 1 through the sensor.
[0031] The baseband 3a of the liquid leakage sensor 3 is made of high molecular plastic material. The baseband 3a itself is insulated, has good flexibility, is easy to deform, and can be cut. At the same time, the baseband 3a needs to be able to withstand a high temperature of about 105 °C.
[0032] There are two electrical connection methods for the liquid leakage sensor 3. Usually, the end of the liquid leakage sensor 3 is provided with a socket. One end of the data line 2 is connected to the sensor controller 1, and the other end is provided with a plug to be inserted into the socket of the liquid leakage sensor 3 to complete the connection between the liquid leakage sensor 3 and the sensor controller 1. When necessary, the liquid leakage sensor 3 can be cut, and the data line 2 is directly connected to the metal electrode 3b on the liquid leakage sensor 3 by soldering.
[0033] Usually, the liquid leakage sensor 3 will retain the end with the socket, and only cut off the other end, and use the socket to cooperate with the plug on the data line 2 to maintain electrical connection. However, in necessary cases, the liquid leakage sensor 3 includes a combination of a baseband 3a and an electrode. The baseband 3a is cut into any length, and the electrode 3b on the baseband 3a is soldered to the data line.
[0034] On the surface of the baseband 3a, there are two identification bands on the left and right. Each identification band includes two adjacent strip-shaped metal electrodes 3b. The two identification bands are connected in parallel as a double insurance.
[0035] The data line 2 includes two wires, a positive wire and a negative wire. One wire is connected to one metal electrode 3b on each of the two identification bands simultaneously.
[0036] On the surface of the metal electrode 3b, a corrosion-resistant protective layer is provided, and the corrosion-resistant protective layer is a conductor. The corrosion-resistant layer is generally a metal coating.
[0037] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present invention.
Claims
1. A leakage monitoring device for a liquid flow battery stack, characterized in that It includes a sensor controller (1), a number of liquid leakage sensors (3), and a data line (2) connecting the sensor controller (1) and the liquid leakage sensors (3); The liquid leakage sensor (3) is in a strip shape and includes a baseband (3a) made of a flexible insulating material. An identification band is arranged on the surface of the baseband (3a). The identification band includes two adjacent strip-shaped metal electrodes (3b), and a gap is reserved between the two electrodes (3b); the electrode (3b) is electrically connected to the data line (2); Some of the liquid leakage sensors (3) are wound into a loop and sleeved at the pipe joint of the liquid flow stack; Some of the liquid pressure sensors are arranged along the edge of the bottom of the box body; Each liquid leakage sensor (3) is independently arranged and connected to the sensor controller (1) through a separate data line (2).
2. The liquid flow battery stack leakage monitoring device according to claim 1, characterized in that The baseband (3a) of the liquid leakage sensor (3) is made of a polymer plastic material.
3. The liquid leakage monitoring device for a flow battery stack according to claim 1, characterized in that, The liquid leakage sensor (3) includes a combination of a baseband (3a) and an electrode. The baseband (3a) is cut to any length, and the electrode (3b) on the baseband (3a) is soldered to the data line.
4. The liquid leakage monitoring device for a flow battery stack according to claim 1, characterized in that, Two identification bands are arranged on the surface of the baseband (3a), and each identification band includes two adjacent strip-shaped metal electrodes (3b).
5. The leakage monitoring device for a flow battery stack according to claim 4, characterized in that, The data line (2) includes two positive and negative wires, and one wire is simultaneously connected to one metal electrode (3b) on each of the two identification bands.
6. The leakage monitoring device for a liquid flow battery stack according to claim 1, wherein A corrosion-resistant protective layer is arranged on the surface of the metal electrode (3b), and the corrosion-resistant protective layer is a conductor.