A device and method for monitoring battery pole leakage in a DC cabinet of a distribution network

Abstract

The present application discloses a device and method for monitoring battery pole leakage in a distribution network DC cabinet. The device includes: a first monitoring module composed of four leakage monitoring slots, a measuring resistor, a current-limiting resistor, and an ammeter arranged at the base of the battery pole; the first monitoring module is used to measure the current value of the circuit through an ammeter when the battery electrolyte leaks into at least one leakage monitoring slot; a first alarm module is used to compare the current value of the first monitoring module with a preset threshold value and generate different alarm signals according to the comparison result; a display module is used to display the current value of the first monitoring module. A second monitoring module with a structure similar to the first monitoring module is further arranged on the periphery of the first monitoring module, thereby forming a secondary monitoring area to monitor the leakage of the battery pole; and solves the technical problem that the existing technology cannot reliably and timely monitor the leakage of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a device and method for monitoring battery pole leakage in a distribution network DC cabinet. Background Art

[0002] The batteries used in DC cabinets typically use lead-acid batteries. Leakage can occur during production due to poor workmanship, improper transportation, or improper installation. Leakage from battery terminals is particularly common in DC cabinets for distribution networks. The primary hazard of battery terminal corrosion in DC cabinets is that it causes corrosion. The chemical reaction between the metal at the terminal and the electrolyte produces an oxide with extremely poor conductivity, creating significant contact resistance at the terminal. This reduces battery output current, affects charging, and can, in severe cases, cause wiring to become detached due to corrosion. Therefore, monitoring leakage from battery terminals in DC cabinets is of great research significance.

[0003] Currently, the main technical solutions for monitoring battery pole leakage are: 1) remotely collecting multiple parameters such as voltage and temperature to comprehensively determine the battery's operating status, but this solution cannot directly and effectively detect leakage problems at the battery pole; 2) detecting battery leakage by setting up multiple liquid collection trays and laying inductive cables in the liquid collection trays. This method is only suitable for measuring when the electrolyte flows to the bottom of the battery, but cannot promptly detect leakage at the pole; 3) using two sets of wires to form a detection sensor. When leakage occurs, a wire path is formed between the two sets of wires of the detection sensor, driving the transistor to send an alarm signal. This sensor can directly detect whether a battery leaks at a certain location. Those skilled in the art know that the direction of battery leakage is random, and the leaked electrolyte solution flows out from any position of the pole and flows in any direction. If the battery leakage detection device provided can only detect leakage in a specific direction, it will not be conducive to promptly detecting battery leakage failures. Summary of the Invention

[0004] The present application provides a device and method for monitoring battery pole leakage in a distribution network DC cabinet, which is used to solve the technical problem that the existing technology cannot reliably and timely monitor battery leakage.

[0005] In view of this, a first aspect of the present application provides a battery pole leakage monitoring device for a distribution network DC cabinet, the device comprising: four leakage monitoring slots provided at the base of the battery pole, four leakage monitoring points consisting of a measuring resistor connected in series to each leakage monitoring slot, and the four leakage monitoring points being connected in series;

[0006] The outlets of any two opposite leakage monitoring points are connected to the positive pole of the DC cabinet voltage-stabilized power supply, and the outlets of the remaining two opposite leakage monitoring points are connected in series with a current-limiting resistor and an ammeter and then connected to the negative pole of the DC cabinet voltage-stabilized power supply to form a first monitoring module;

[0007] The first monitoring module is configured to measure the current value of the circuit through an ammeter when the battery electrolyte leaks into at least one leakage monitoring tank;

[0008] The display module is used to display the current value of the first monitoring module.

[0009] Optionally, it further includes: a first alarm module;

[0010] The first alarm module is used to compare the current value of the first monitoring module with a preset threshold value and generate different alarm signals according to the comparison result.

[0011] Optionally, it further comprises: a second monitoring module consisting of four leakage slots, a measuring resistor, a current limiting resistor and an ammeter arranged on the periphery of the first monitoring module, and a second alarm module;

[0012] The second monitoring module is configured to measure the current value of the circuit through an ammeter when the battery electrolyte leaks through the first monitoring module and enters at least one leakage monitoring slot of the second monitoring module;

[0013] The second alarm module is used to compare the current value of the second monitoring module with a preset threshold value and generate different alarm signals according to the comparison result.

[0014] Optionally, the first alarm module and the second alarm module are both composed of a plurality of alarm signal lights.

[0015] Optionally, the first alarm module is specifically configured to:

[0016] The current value of the first monitoring module is compared with a preset threshold value, and different numbers of alarm signal lights are controlled to light up according to the comparison result.

[0017] A second aspect of the present application provides a method for monitoring battery pole leakage in a distribution network DC cabinet, which is applied to the device for monitoring battery pole leakage in a distribution network DC cabinet described in the first aspect. The method comprises:

[0018] When the battery electrolyte leaks into at least one leakage monitoring tank, the current value of the circuit is measured by the ammeter of the first monitoring module;

[0019] The first alarm module compares the current value of the first monitoring module with a preset threshold value, and controls different numbers of alarm signal lights to light up according to the comparison result;

[0020] The display module displays the current value of the first monitoring module.

[0021] Optionally, it also includes:

[0022] When the battery electrolyte leaks through the first monitoring module and enters at least one leakage monitoring slot of the second monitoring module, the current value of the circuit is measured by the ammeter of the second monitoring module;

[0023] The second alarm module compares the current value of the second monitoring module with a preset threshold value and generates different alarm signals according to the comparison result.

[0024] It can be seen from the above technical solutions that this application has the following advantages:

[0025] The present application provides a battery pole leakage monitoring device for a distribution network DC cabinet, comprising: four leakage monitoring slots arranged at the battery pole base, four leakage monitoring points consisting of a measuring resistor connected in series to each leakage monitoring slot, and the four leakage monitoring points are connected in series, with the outlet sides of any two opposite leakage monitoring points connected to the positive pole of the DC cabinet voltage-stabilized power supply, and the outlet sides of the remaining two opposite leakage monitoring points are connected in series with a current-limiting resistor and an ammeter and then connected to the negative pole of the DC cabinet voltage-stabilized power supply, forming a first monitoring module; the first monitoring module is used to measure the current value of the circuit through an ammeter when the battery electrolyte leaks into at least one leakage monitoring slot; the first alarm module is used to compare the current value of the first monitoring module with a preset threshold value, and generate different alarm signals according to the comparison result; and the display module is used to display the current value of the first monitoring module.

[0026] Compared to existing technologies, the leakage monitoring device of this application can directly detect leakage at the battery terminal, regardless of the direction of electrolyte flow, and can display the severity of the leakage in a graded manner. Furthermore, the device is low-cost, convenient and effective, with simple installation and strong applicability, thus resolving the technical problem of existing technologies that cannot reliably and promptly monitor battery leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the arrangement of a leakage monitoring tank and a measuring resistor provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram showing the principle of calculating the measurement current in the leakage monitoring method provided in the embodiments of the present application;

[0029] Figure 3 This is a schematic diagram of the two-level liquid leakage monitoring area provided in an embodiment of the present application;

[0030] Figure 4This is a flow chart of an embodiment of a method for monitoring battery pole leakage in a DC cabinet in a distribution network provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0032] See also Figure 1 , a battery pole leakage monitoring device for a distribution network DC cabinet provided in an embodiment of the present application includes:

[0033] Four leakage monitoring slots are provided at the base of the battery pole, each leakage monitoring slot is connected in series with a measuring resistor to form four leakage monitoring points, and the four leakage monitoring points are connected in series;

[0034] The outlets of any two opposite leakage monitoring points are connected to the positive pole of the DC cabinet voltage-stabilized power supply, and the outlets of the remaining two opposite leakage monitoring points are connected in series with a current-limiting resistor and an ammeter and then connected to the negative pole of the DC cabinet voltage-stabilized power supply to form a first monitoring module;

[0035] It should be noted that if Figure 1 As shown, four leakage monitoring grooves are set around the battery pole base of the DC cabinet with the pole as the center; 11 is the battery pole, and 12 is the leakage monitoring groove. The depth of the leakage monitoring groove includes but is not limited to 1mm, and the distance between the groove and the center of the circle depends on the size of the battery. When the battery electrolyte leaks and flows through the monitoring groove, the two ends will be connected. 13 is the measuring resistor Rm, and 13 is connected in series to a section of the leakage monitoring groove to form a leakage monitoring point. 14 is a wire, and the four leakage monitoring points are connected in series with the pole as the center of the circle. Each leakage monitoring point is connected in series with the wire 14. The wire can be arranged in the pole base or pasted on the bottom of the pole. Further, the outlet side of any two opposite leakage monitoring points is connected to the positive pole V+ of the power supply, as shown Figure 1 As shown, specifically, connect A and C to the positive pole of the power supply V+; connect the outlets of the remaining two opposite leakage monitoring points in series with a current limiting resistor Rg and an ammeter G, and then connect them to the negative pole of the power supply V-, as shown in the figure. Figure 1 As shown, specifically, B and D are connected in series with a current limiting resistor Rg and an ammeter G, and then connected to the negative electrode V- of the power supply to form a first monitoring module.

[0036] A first monitoring module is configured to measure the current value of a circuit through an ammeter when the battery electrolyte leaks into at least one leakage monitoring tank;

[0037] It should be noted that the leakage situation can be further determined by judging the amount of battery electrolyte leaking through the monitoring slot; the calculation principle is as follows Figure 2 As shown, 21 is a DC power supply V, preferably the DC cabinet can be used as the main power supply. R1, R2, R3, and R4 in 22 are the resistances of the four leakage monitoring tanks, that is, Figure 1 12 represents the resistance. Under normal circumstances, R i It can be regarded as infinite, i=1,2,3,4; when the battery electrolyte leaks and flows through the corresponding monitoring slot, R i = 0, i = 1, 2, 3, 4. R in 23 1m 、R 2m 、R 3m 、R 4m The measuring resistors are connected in series to the leakage monitoring tank, namely Figure 1 13, preferably, let R 1m 、R 2m 、R 3m 、R 4m The resistance value is R m 24 is the current limiting resistor R g , 25 is the ammeter. In the figure, V, R m 、R g The value can be selected according to the DC cabinet's control bus output voltage and ammeter model.

[0038] When the electrolyte leaks through a monitoring cell, the measured current is

[0039] When the electrolyte leaks through the two monitoring cells, the measured current is

[0040] When the electrolyte leaks through the three monitoring cells, the measured current is

[0041] When the electrolyte leaks through the four monitoring cells, the measured current is

[0042] A display module, used to display the current value of the first monitoring module;

[0043] It is understandable that displaying the current value measured by the first monitoring module allows operation and maintenance personnel to promptly know the leakage situation of the battery pole, such as the leakage direction.

[0044] The first alarm module is used to compare the current value of the first monitoring module with a preset threshold value and generate different alarm signals according to the comparison result.

[0045] Specifically, the current value of the first monitoring module is compared with a preset threshold value, and different numbers of alarm signal lights are controlled to light up according to the comparison result, so that operation and maintenance personnel can find out in time.

[0046] Furthermore, in one embodiment, the leakage monitoring device further comprises: a second monitoring module consisting of four leakage slots, a measuring resistor, a current limiting resistor and an ammeter arranged on the periphery of the first monitoring module, and a second alarm module;

[0047] It should be noted that the radius of the leakage monitoring slot is increased at the pole base, and the second alarm module is designed according to the design method of the first monitoring module. Specifically, 4 monitoring slots are added to the periphery of the first-level monitoring slot to achieve two-level monitoring. Figure 3 As shown, 31 represents the battery, 32 and 33 represent the positive and negative terminals, respectively, 34 represents the ammeter for the primary monitoring area, and 35 represents the ammeter for the secondary monitoring area. The A and C terminals of the first monitoring module share the same positive power supply terminal with the A' and C' terminals of the secondary monitoring areas, and can also share the same positive terminal with other battery monitoring modules in the same DC cabinet. The B and D terminals of the first monitoring module, and the B' and D' terminals of the second monitoring module, are each connected in series with a current-limiting resistor and an ammeter to the negative power supply terminal.

[0048] The second monitoring module is configured to measure the current value of the circuit through an ammeter when the battery electrolyte leaks through the first monitoring module and enters at least one leakage monitoring slot of the second monitoring module;

[0049] It is understandable that the current value measured by the second monitoring module is displayed on the basis of the current value measured by the first monitoring module, so that the operation and maintenance personnel can know the severity of the battery pole leakage.

[0050] The second alarm module is used to compare the current value of the second monitoring module with a preset threshold value and generate different alarm signals according to the comparison result.

[0051] Specifically, two rows of alarm signal lights are set on the DC cabinet control panel. The first row represents the first monitoring module, and the second row represents the second monitoring module. When the electrolyte leaks through the monitoring tank, the corresponding area and the corresponding number of alarm signal lights will be lit according to the measured current size, so that the operation and maintenance personnel can discover it in time.

[0052] The above is an embodiment of a distribution network DC cabinet battery pole leakage monitoring device provided in the embodiments of the present application. The following is an embodiment of a distribution network DC cabinet battery pole leakage monitoring method provided in the embodiments of the present application.

[0053] See also Figure 4 A method for monitoring battery pole leakage in a DC cabinet in a distribution network provided in an embodiment of the present application includes:

[0054] Step 101: When the battery electrolyte leaks into at least one leakage monitoring tank, the current value of the circuit is measured by the ammeter of the first monitoring module;

[0055] Step 102: The first alarm module compares the current value of the first monitoring module with a preset threshold value, and controls different numbers of alarm signal lights to light up according to the comparison result;

[0056] Step 103: The display module displays the current value of the first monitoring module.

[0057] Furthermore, in one embodiment, the liquid leakage monitoring method further includes:

[0058] When the battery electrolyte leaks through the first monitoring module and enters at least one leakage monitoring slot of the second monitoring module, the current value of the circuit is measured by the ammeter of the second monitoring module;

[0059] The second alarm module compares the current value of the second monitoring module with a preset threshold value and generates different alarm signals according to the comparison result.

[0060] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working process of the method described above can refer to the corresponding process in the aforementioned device embodiment, and will not be repeated here.

[0061] The terms "first," "second," "third," "fourth," etc., in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatus.

[0062] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0063] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0064] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0065] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0066] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English full name: Read-Only Memory, English abbreviation: ROM), random access memory (English full name: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program code.

[0067] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pole leakage monitoring device for a DC cabinet in a distribution network, characterized in that: include: Four first leakage monitoring slots are provided at the battery pole base, each of the first leakage monitoring slots is connected in series with a first measuring resistor to form four first leakage monitoring points, and the four first leakage monitoring points are connected in series; The outlet sides of any two opposite first leakage monitoring points are connected to the positive electrode of the DC cabinet voltage-stabilized power supply, and the outlet sides of the remaining two opposite first leakage monitoring points are connected in series with a first current-limiting resistor and a first ammeter, and then connected to the negative electrode of the DC cabinet voltage-stabilized power supply to form a first monitoring module; The first monitoring module is configured to measure the current value of the circuit through the first ammeter when the battery electrolyte leaks into the at least one first leakage monitoring tank; in: When the electrolyte leaks through a first leakage monitoring tank, the measured current is ; When the electrolyte leaks through the two first leakage monitoring tanks, the measured current is ; When the electrolyte leaks through the three first leakage monitoring tanks, the measured current is ; When the electrolyte leaks through the four first leakage monitoring tanks, the measured current is ; Where, is the current value of the first ammeter measuring the circuit, is the voltage value of the DC cabinet regulated power supply, is the resistance of the first measuring resistor, is the resistance value of the first current limiting resistor; The display module is used to display the current value of the first monitoring module.

2. The battery pole leakage monitoring device for a DC cabinet in a distribution network according to claim 1 is characterized in that: Also includes: First alarm module; The first alarm module is used to compare the current value of the first monitoring module with a first preset threshold value, and generate different alarm signals according to the comparison result.

3. The battery pole leakage monitoring device for a DC cabinet in a distribution network according to claim 2, characterized in that: Also includes: a second monitoring module consisting of four second liquid leakage monitoring slots, a second measuring resistor, a second current limiting resistor and a second ammeter arranged on the periphery of the first monitoring module, and a second alarm module; Among them, four second leakage monitoring points are formed by each second leakage monitoring tank being connected in series with a second measuring resistor, and the four second leakage monitoring points are connected in series, and the outlet sides of any two opposite second leakage monitoring points are connected to the positive electrode of the DC cabinet voltage-stabilized power supply, and the outlet sides of the remaining two opposite second leakage monitoring points are connected and then connected in series with a second current-limiting resistor and a second ammeter, and then connected to the negative electrode of the DC cabinet voltage-stabilized power supply; The second monitoring module is configured to measure the current value of the circuit through a second ammeter when the battery electrolyte leaks through the first monitoring module and enters at least one leakage monitoring slot of the second monitoring module; The second alarm module is used to compare the current value of the second monitoring module with a second preset threshold value and generate different alarm signals according to the comparison result.

4. The battery pole leakage monitoring device for a DC cabinet in a distribution network according to claim 3 is characterized in that: The first alarm module and the second alarm module are both composed of a plurality of alarm signal lights.

5. The battery pole leakage monitoring device for a DC cabinet in a distribution network according to claim 4, characterized in that: The first alarm module is configured to: The current value of the first monitoring module is compared with a first preset threshold value, and different numbers of warning signal lights are controlled to light up according to the comparison result.

6. A method for monitoring battery pole leakage in a DC cabinet of a distribution network, characterized in that: The battery pole leakage monitoring device for a distribution network DC cabinet according to any one of claims 3 to 5 comprises: When the battery electrolyte leaks into at least one first leakage monitoring tank, the current value of the circuit is measured by the first ammeter of the first monitoring module; in: When the electrolyte leaks through a first leakage monitoring tank, the measured current is ; When the electrolyte leaks through the two first leakage monitoring tanks, the measured current is ; When the electrolyte leaks through the three first leakage monitoring tanks, the measured current is ; When the electrolyte leaks through the four first leakage monitoring tanks, the measured current is ; Where, is the current value of the first ammeter measuring the circuit, is the voltage value of the DC cabinet regulated power supply, is the resistance of the first measuring resistor, is the resistance value of the first current limiting resistor; The first alarm module compares the current value of the first monitoring module with a first preset threshold value, and controls different numbers of alarm signal lights to light up according to the comparison result; The display module displays the current value of the first monitoring module.

7. The method for monitoring battery pole leakage in a DC cabinet of a distribution network according to claim 6, characterized in that: Also includes: When the battery electrolyte leaks through the first monitoring module and enters at least one second leakage monitoring slot of the second monitoring module, the current value of the circuit is measured by the second ammeter of the second monitoring module; The second alarm module compares the current value of the second monitoring module with a second preset threshold value, and generates different alarm signals according to the comparison result.

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