CN209764998U - Storage battery pack insulation descending positioning monitoring device - Google Patents
Storage battery pack insulation descending positioning monitoring device Download PDFInfo
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- CN209764998U CN209764998U CN201920418874.7U CN201920418874U CN209764998U CN 209764998 U CN209764998 U CN 209764998U CN 201920418874 U CN201920418874 U CN 201920418874U CN 209764998 U CN209764998 U CN 209764998U
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Abstract
the utility model discloses an insulating decline location monitoring device of storage battery, the data acquisition module who connects in order in the device, a processor, report an emergency and ask for help or increased vigilance output module, be equipped with little current sensor in the data acquisition module, unbalanced bridge voltage sampling circuit and unbalanced bridge control circuit, still include the man-machine interaction module who is connected with the treater, user's accessible man-machine interaction module sets up ground connection alarm resistance value, drop into the positive negative pole of storage battery respectively with unbalanced bridge voltage sampling circuit and take notes storage battery positive and negative pole to the ground voltage, the electric current that combines to gather calculates ground connection battery festival number and ground resistance with known battery cell voltage, produce when ground connection alarm resistance value that ground resistance is less than the setting and report an emergency and ask for help or increased vigilance the output, can pinpoint to the single-section battery, more rapidly accurate monitoring.
Description
Technical Field
The application relates to the technical field of insulation monitoring, in particular to a storage battery pack insulation descending positioning monitoring device.
Background
The storage battery pack is an independent and reliable power supply, is not influenced by an alternating current power supply, and can still ensure that electric equipment in a direct current system reliably and continuously works and the voltage is stable when any accident occurs in a power plant or a transformer substation and even under the condition that the alternating current power supply of the whole plant and the whole station is powered off; meanwhile, the power supply can also be used as an emergency lighting power supply of a whole plant and a whole station, and is a final barrier for ensuring that the power supply is not interrupted. In a storage battery pack, because a lead-acid battery is not maintained timely, a single battery can possibly leak electrolyte, so that insulation is reduced; it is also possible that the insulation of the connecting lines of the battery is reduced due to aging, thereby affecting the insulating properties of the entire battery pack. The insulation reduction of the storage battery pack not only influences the reliable operation of a direct current system, but also causes the capacity reduction of a single storage battery, thereby influencing the capacity of the whole storage battery pack.
In the GB/T-19826-2014 general technical conditions and safety requirements of direct current power supply equipment in electric power engineering, it is clearly required that an insulation monitoring device should correctly send a signal and have a corresponding remote signal contact when a ground fault occurs in a direct current system or the insulation level is reduced to a set value.
The patent number CN103116107A discloses a high-voltage direct-current power supply insulation monitoring device, which is used for monitoring the ground insulation condition of direct-current output voltage of a high-voltage direct-current power supply, judging the insulation state by monitoring the insulation resistance of a bus to the ground, and uploading the insulation resistance value to an upper computer, and comprises a first additional delivery resistor R1, a second additional delivery resistor R2, a first delivery switch K1 and a second delivery switch K2, wherein R1 and K1 are connected in series, one end of the R1 is connected to a positive bus, and the other end of the R1 is grounded; the R2 is connected with the K2 in series, one end of the R2 is connected to the negative bus, and the other end of the R2 is grounded; the equivalent ground insulation resistance of the positive bus is R +, the equivalent ground insulation resistance of the negative bus is R-, the R + and the R-are obtained by adopting an unbalanced bridge method, any insulation state can be monitored by the unbalanced bridge method, and the insulation state can be timely and accurately monitored by establishing a branch monitoring equation.
The scheme has the following defects: when DC power supply is storage battery, not accurate enough when fixing a position the insulating decline department that produces, at this moment, need provide a high location monitoring device of accuracy and monitor.
SUMMERY OF THE UTILITY MODEL
The application is not enough to prior art, provides the insulating decline location monitoring device of storage battery who seeks the single cell that insulating descends of ability accurate positioning.
in order to achieve the purpose, the following technical scheme is adopted in the application:
The utility model provides an insulating decline location monitoring device of storage battery, includes that this internal treater, the alarm output module that connects in order of device body and device, its characterized in that: the device is characterized by further comprising a data acquisition module, wherein a micro-current sensor for acquiring the grounding current of the storage battery pack, an unbalanced bridge voltage sampling circuit for detecting the grounding voltage of the positive electrode and the negative electrode of the storage battery pack and an unbalanced bridge control circuit for switching the input of the unbalanced bridge are arranged in the data acquisition module, and the micro-current sensor, the balanced bridge voltage sampling circuit and the unbalanced bridge control circuit are respectively and electrically connected with the processor.
The insulation descending positioning monitoring device for the storage battery pack is characterized in that: a memory coupled to the processor is also included.
the insulation descending positioning monitoring device for the storage battery pack is characterized in that: the grounding alarm circuit also comprises a man-machine interaction module connected with the processor, and a user can set a grounding alarm resistance value through the man-machine interaction module.
The insulation descending positioning monitoring device for the storage battery pack is characterized in that: the data acquisition module is connected with the processor, and the processor sends the information received from the data acquisition module to the receiving terminal through the communication module.
The beneficial effect of this application:
1. The device can accurately position the storage battery pack to a single battery when the object of insulation drop positioning monitoring is the storage battery pack, and plays a monitoring role more quickly and accurately; the problem that the traditional insulation monitor cannot detect and report the blind spot of insulation reduction of a direct current system caused by insulation reduction of a single battery can be solved; the abnormal problems that the self-discharge current of the battery is large, the capacity of the battery is influenced, the service life of the battery is prolonged and the like caused by the grounding of the single battery are solved in time; meanwhile, the device also has the functions of monitoring the insulation of the direct current bus to the ground, the branch to the ground and the like.
Drawings
FIG. 1 is a schematic diagram of a hardware structure of a battery pack insulation drop positioning monitoring device in the present application;
FIG. 2 is a schematic circuit diagram of a data acquisition module of the monitoring device for insulation drop of the storage battery pack in the present application;
FIG. 3 is an electrical wiring schematic diagram of the battery pack insulation drop positioning monitoring device of the present application;
Fig. 4 is a schematic diagram of information transmission of a method for monitoring a descent location in the present application;
Fig. 5 is a logic diagram of calculating a grounded battery in the descent localization monitoring method of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1, 2, 3, 4 and 5, the storage battery pack insulation descending positioning monitoring device comprises a data acquisition module, a communication module, a processor and an alarm output module which are sequentially connected in the device.
The data acquisition module is internally provided with a micro-current signal sensor for detecting the earth current of the storage battery pack, an unbalanced bridge voltage sampling circuit for detecting the earth voltage of the positive electrode and the negative electrode of the storage battery pack and an unbalanced bridge voltage control circuit, the unbalanced bridge voltage sampling circuit can be controlled to switch between the measurement of the positive electrode voltage and the negative electrode voltage of the storage battery pack through the unbalanced bridge voltage control circuit, and the micro-current signal sensor, the balanced bridge voltage sampling circuit and the unbalanced bridge control circuit are respectively electrically connected with the processor.
In this application, still be equipped with the data storage module who is connected with the treater on the insulating decline location monitoring device of storage battery, can be with predetermined insulating decline alarm value.
In this application, still be equipped with the human-computer interaction module who is connected with the treater on the insulating decline location monitoring device of storage battery, user's accessible human-computer interaction module presets ground connection alarm resistance value, and ground connection alarm resistance value can be along with factors adjustment such as temperature, season, improves the flexibility of the insulating decline location monitoring device of storage battery.
In the application, the application software module of the processor comprises an AD conversion module, a data calculation and analysis module, a judgment and output module, a man-machine conversation module, a non-equilibrium bridge control module and an online help module, and the functions of timely knowing insulation descending information online by a user, setting an insulation descending alarm value by the user, automatically judging an alarm by a system, monitoring the insulation descending condition and the like are realized.
The working process is as follows:
S1, starting an unbalanced bridge voltage sampling circuit;
S2, putting the unbalanced bridge into the positive pole of the storage battery pack, recording voltages to earth of the positive pole and the negative pole of the storage battery pack as Up1 and Un1 respectively, and collecting a ground current I1 of the storage battery pack through a micro-current signal sensor;
s3, putting the unbalanced bridge into the negative electrode of the storage battery pack, recording the voltages to earth of the positive electrode and the negative electrode of the storage battery pack as Up2 and Un2 respectively, and collecting the earth current I2 of the storage battery pack through a micro-current signal sensor;
S4, calculating positive and negative end batteries by combining the data obtained in S2 and S3 with the known single battery voltage Ubats
ground node number nBat and ground resistance Rbat:
when I1>0, I2>0, and I1 ≠ I2
Rbat＝(Up1-Up2)/(I1-I2)；
nBat＝-Un1+(I1*Rbat)/Ubats；
● when I1<0, I2<0, and I1 ≠ I2
Rbat＝(Un1-Un2)/(I2-I1)；
nBat＝(Un1+(Rbat*I1))/Ubats；
● when I1>0, I2<0
Rbat＝(Un2-Un1)/(I2-I1)；
nBat＝(Un2+(I2*Rbat))/Ubats；
● when I1 is less than 0, I2 is not less than 0
Rbat＝(Un2-Un1)/(I2-I1)；
nBat＝(-Un1+(I1*Rbat))/Ubats。
In the present application, before step S1, a ground alarm resistance value is set in the processor; after step S4, the calculated Rbat is compared with the set ground alarm resistance value, and an alarm output is generated when Rbat is equal to or less than the set ground alarm resistance value.
The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present application, and equivalent alternatives or modifications according to the technical solutions and the inventive concepts of the present application, and all such alternatives or modifications are encompassed in the scope of the present application.
Claims (4)
1. The utility model provides an insulating decline location monitoring device of storage battery, includes that this internal treater, the alarm output module that connects in order of device body and device, its characterized in that: the device is characterized by further comprising a data acquisition module, wherein a micro-current sensor for acquiring the grounding current of the storage battery pack, an unbalanced bridge voltage sampling circuit for detecting the grounding voltage of the positive electrode and the negative electrode of the storage battery pack and an unbalanced bridge control circuit for switching the input of the unbalanced bridge are arranged in the data acquisition module, and the micro-current sensor, the balanced bridge voltage sampling circuit and the unbalanced bridge control circuit are respectively and electrically connected with the processor.
2. A battery pack insulation lowering position monitoring device as claimed in claim 1, wherein: a memory coupled to the processor is also included.
3. A battery pack insulation lowering position monitoring device as claimed in claim 1, wherein: the grounding alarm circuit also comprises a man-machine interaction module connected with the processor, and a user can set a grounding alarm resistance value through the man-machine interaction module.
4. A battery pack insulation lowering position monitoring device as claimed in claim 1, wherein: the data acquisition module is connected with the processor, and the processor sends the information received from the data acquisition module to the receiving terminal through the communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920418874.7U CN209764998U (en) | 2019-03-29 | 2019-03-29 | Storage battery pack insulation descending positioning monitoring device |
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| CN201920418874.7U CN209764998U (en) | 2019-03-29 | 2019-03-29 | Storage battery pack insulation descending positioning monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579691A (en) * | 2019-03-29 | 2019-12-17 | 珠海瑞特电气设备有限公司 | Storage battery pack insulation descending positioning monitoring device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579691A (en) * | 2019-03-29 | 2019-12-17 | 珠海瑞特电气设备有限公司 | Storage battery pack insulation descending positioning monitoring device and method |
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