CN113959521A - Liquid level detection system and method for flooded storage battery pack - Google Patents
Liquid level detection system and method for flooded storage battery pack Download PDFInfo
- Publication number
- CN113959521A CN113959521A CN202111186277.4A CN202111186277A CN113959521A CN 113959521 A CN113959521 A CN 113959521A CN 202111186277 A CN202111186277 A CN 202111186277A CN 113959521 A CN113959521 A CN 113959521A
- Authority
- CN
- China
- Prior art keywords
- storage battery
- liquid level
- level detection
- liquid
- standard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 222
- 238000001514 detection method Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title description 14
- 230000001502 supplementing effect Effects 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 15
- 238000012937 correction Methods 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 14
- 230000037221 weight management Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 abstract description 6
- 239000013589 supplement Substances 0.000 abstract description 6
- 230000002950 deficient Effects 0.000 abstract description 3
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
- G01F23/18—Indicating, recording or alarm devices actuated electrically
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a liquid level detection system of a flooded storage battery pack, which comprises a liquid level detection host, a storage battery box tray, a pressure sensor and a connector, wherein the liquid level detection host is connected with the pressure sensor; the invention can efficiently and accurately detect the position of a liquid-deficient battery in a battery pack in the battery pack, and has the main principle that the maximum liquid level and overflow alarm of the battery are set according to the relation of weight change caused by liquid level change in the battery pack and liquid supplement liquid level and low liquid level alarm are set according to the minimum liquid level.
Description
Technical Field
The invention relates to the field of rail transit auxiliary power supply systems, in particular to a liquid level detection system and method for a flooded storage battery pack.
Background
The flooded secondary battery represented by the nickel-cadmium storage battery is widely applied to the rail transit industry, and according to statistics of the application condition of the storage battery of the rail transit vehicles in China, more than 80 percent of rail transit vehicles adopt the nickel-cadmium storage battery as a vehicle-mounted secondary battery to provide emergency power supply for the vehicles under the condition of no external power supply.
The nickel-cadmium storage battery mainly comprises seven parts, namely a polar plate, a polar lug, a polar column, a diaphragm, a shell cover and a liquid injection bolt, and according to the application environment and the reaction characteristics of the nickel-cadmium storage battery, the electrolyte of the nickel-cadmium storage battery has the conditions of natural evaporation and overcharge electrolysis, and the maintenance liquid supplement needs to be carried out on the battery when the operation and maintenance interval period is long.
With the continuous improvement of the fire-proof safety standard of public transportation, the battery shell develops towards the direction of fire prevention and flame retardance, and the semitransparent or opaque organic flame-retardant material improves the difficulty of maintenance of the pregnant solution battery.
For the usability of the vehicle battery system, it is necessary to quickly and reliably identify the battery cell with short liquid from a plurality of batteries in the battery pack, and until now, for detecting the liquid level of the liquid-rich battery, there are methods of capacitance detection identification, concentrated liquid injection and liquid supplement, visual inspection and the like, but there is no method for conveniently, quickly and economically identifying all the above faults.
The flooded battery uses the charge and discharge control technology of the lithium ion battery for reference, provides the concept of a battery management system, monitors the voltage, the current and the temperature of the battery, and evaluates and corrects the residual capacity and the health state of the battery through the charging State (SOC) and the health State (SOH) of the battery, but has no significant guiding significance for the liquid replenishing cycle of the flooded battery, especially the nickel-cadmium battery. Some technologies also adopt capacitance and ultrasonic technologies to realize the liquid level detection of the storage battery, and a gravity sensing-based liquid-enriched storage battery liquid level detection method is provided.
Disclosure of Invention
The battery is often mounted on the roof or underbody region as a secondary battery of the vehicle. The battery maintenance system has the characteristics of narrow space, dense battery arrangement and large maintenance workload. Many times, due to structural limitations, the battery case needs to be reduced in size as much as possible to meet the overall layout of the integrated structure and the economic requirements of operation and maintenance.
The invention aims to reduce the maintenance workload of the battery, quickly find the battery with the barren solution fault and give a quantitative liquid supplementing suggestion.
In order to achieve the aim, the invention provides a liquid level detection system of a flooded storage battery pack, which comprises a liquid level detection host, a storage battery tray, a pressure sensor and a connector, wherein the liquid level detection host is connected with the pressure sensor;
the liquid level detection host is used for collecting pressure signals of a pressure sensor at the lower part of the storage battery, comparing and calculating the pressure signals through a step algorithm, and feeding back the liquid level information of the storage battery to the train management system in a serial port communication mode;
the train management system is used for communicating with each electric system of the vehicle, the vehicle-mounted system for detecting and controlling the vehicle by collecting the circuit state of the vehicle, and a man-machine interface display screen arranged in the train management system can display the state data and the functional data of vehicle parts and components returned by each system of the vehicle and the liquid level detection host computer so as to assist drivers and passengers to finish the related work of vehicle operation and maintenance;
the storage battery tray, the pressure sensors, the connectors and the liquid level detection host are all located in the storage battery box, the storage battery pack is arranged in the storage battery tray, the pressure sensors are preset below each storage battery, the connectors are integrated on one side of the storage battery tray, connecting lines of the pressure sensors are connected with the liquid level detection host through the connectors, and the liquid level detection host is connected with the train management system and transmits information to the train management system.
A liquid level detection method for a flooded storage battery pack comprises the following steps:
(1) measuring the pressure value of the storage battery at the lowest liquid level according to the pressure sensor, and taking the pressure value as standard minimum mass Msm;
replenishing the liquid of the storage battery to a standard liquid level, recording liquid level information, and measuring a pressure value of the standard liquid level through a pressure sensor to be used as a standard free mass Ms of each storage battery;
supplementing the liquid to the maximum liquid level scale mark, and recording the pressure value of the maximum liquid level through a pressure sensor to be used as the standard maximum mass Msx;
(2) liquid supplementing is carried out on all storage batteries of the storage battery pack, and the liquid supplementing is carried out to a standard liquid level;
according to the arrangement form of the storage battery packs, the pressure sensors are arranged in the storage battery tray and are installed completely, the storage batteries are placed in the tray and are connected and assembled to form the storage battery packs, and then the pressure value of the pressure sensor of the lower battery of each assembled storage battery is recorded and serves as the standard assembly quality Ma of each storage battery.
(3) Subtracting the standard free mass Ms of the single storage battery in the step (1) from the standard assembling mass Ma in the step (2) to obtain a correction coefficient delta;
calculating the maximum assembly quality Max (Msx + delta) of each storage battery through the correction coefficient;
calculating the minimum assembly quality Mam of each storage battery as Msm + delta through the correction coefficient;
(4) through the assembly weight management to single section battery, judge its liquid level state:
when the weight M of the storage battery is measured to be within the range that the Mam is less than the range that the M is less than 110 percent, setting storage battery overflow liquid early warning;
setting a storage battery liquid supplementing early warning when the measured storage battery weight M is in an interval of Max > M > 90% Max;
when the weight M of the storage battery is measured to be within the range that M is less than 3% of Mam, setting a liquid supplementing alarm of the storage battery;
when the weight M of the storage battery is measured to be within the range that M is more than 97% Max, a storage battery overflow alarm is set;
(5) and (4) feeding back the position information to the liquid level detection host through the connector by using the pressure sensor at the lower part of the storage battery with the liquid supplementing or overflowing early warning and alarming function in the step (4).
(6) The liquid level detection host collects pressure signals of the pressure sensors at the lower parts of the storage batteries, compares and operates the pressure signals through the algorithm of the steps, and feeds back liquid level information of each storage battery to a man-machine interface display screen of a train management system in a serial port communication mode, so that the position of a fault storage battery in the storage battery pack is determined.
In order to achieve the same purpose, the invention provides a liquid level detection system of a flooded storage battery pack, which comprises a liquid level detection host, a storage battery tray, a pressure sensor, a connector and an upper computer, wherein the liquid level detection host is connected with the pressure sensor;
the liquid level detection host is used for collecting pressure signals of a pressure sensor at the lower part of the storage battery, comparing and calculating the pressure signals through a step algorithm, and feeding back the liquid level information of the storage battery to the upper computer in a serial port communication mode;
the storage battery tray, the pressure sensors and the connectors are all located in the storage battery box, the storage battery pack is arranged in the storage battery tray, the pressure sensors are all preset below each storage battery, the connectors are integrated on one side of the storage battery tray, the liquid level detection host is arranged on the ground, connecting wires of the pressure sensors are all connected with the liquid level detection host through the connectors, and the upper computer is connected with the liquid level detection host through a serial port communication protocol.
Furthermore, the upper computer is a computer pre-installed with liquid level detection maintenance software.
A liquid level detection method for a flooded storage battery pack comprises the following steps:
(1) measuring the pressure value of the storage battery at the lowest liquid level according to the pressure sensor, and taking the pressure value as standard minimum mass Msm;
replenishing the liquid of the storage battery to a standard liquid level, recording liquid level information, and measuring a pressure value of the standard liquid level through a pressure sensor to be used as a standard free mass Ms of each storage battery;
supplementing the liquid to the maximum liquid level scale mark, and recording the pressure value of the maximum liquid level through a pressure sensor to be used as the standard maximum mass Msx of each storage battery;
(2) liquid supplementing is carried out on all storage batteries of the storage battery pack, and the liquid supplementing is carried out to a standard liquid level;
according to the arrangement form of the storage battery packs, the pressure sensors are arranged in the storage battery tray and are installed completely, the storage batteries are placed in the tray and are connected and assembled to form the storage battery packs, and then the pressure value of the pressure sensor of the lower battery of each assembled storage battery is recorded and serves as the standard assembly quality Ma of each storage battery.
(3) Subtracting the standard free mass Ms in the step (1) from the standard assembling mass Ma in the step (2) to obtain a correction coefficient delta;
calculating the maximum assembly quality Max (Msx + delta) of each storage battery through the correction coefficient;
calculating the minimum assembly quality Mam of each storage battery as Msm + delta through the correction coefficient;
(4) through the assembly weight management to single section battery, judge its liquid level state:
when the weight M of the storage battery is measured to be within the range that the Mam is less than the range that the M is less than 110 percent, setting storage battery overflow liquid early warning;
setting a storage battery liquid supplementing early warning when the measured storage battery weight M is in an interval of Max > M > 90% Max;
when the weight M of the storage battery is measured to be within the range that M is less than 3% of Mam, setting a liquid supplementing alarm of the storage battery;
when the weight M of the storage battery is measured to be within the range that M is more than 97% Max, a storage battery overflow alarm is set;
(5) and (4) feeding back the position information to the liquid level detection host through the connector by using the pressure sensor at the lower part of the storage battery with the liquid supplementing or overflowing early warning and alarming function in the step (4).
(6) When maintenance and detection are needed, the connector is connected to the liquid level detection host, the liquid level detection host is connected with the upper computer, the liquid level detection host collects pressure signals of the pressure sensors at the lower part of each storage battery, the pressure signals are compared and operated through the algorithm of the steps, liquid level information of each storage battery is fed back to the upper computer in a serial port communication mode, and the measured information of each storage battery is displayed in a human-computer interface, so that the position of a fault storage battery in the storage battery pack is determined.
The invention can efficiently and accurately detect the position of a liquid-deficient battery in a battery pack in the battery pack, and has the main principle that the maximum liquid level and overflow alarm of the battery are set according to the relation of weight change caused by liquid level change in the battery pack and liquid supplement liquid level and low liquid level alarm are set according to the minimum liquid level.
Drawings
FIG. 1 is a topological diagram of a vehicle-mounted liquid level detection method;
FIG. 2 is a topological diagram of a ground-based liquid level detection method;
FIG. 3 is a battery layout;
FIG. 4 is a diagram of the connection of the pressure sensor to the connector;
FIG. 5 is a diagram showing the positional relationship of the battery, sensor and battery case;
FIG. 6 is a schematic diagram of a liquid level detection host.
In the figure: 1-a storage battery; 2-a pressure sensor; 3-a liquid level detection host; 4-an upper computer; 5-a connector; 6-a storage battery box; 7-a battery tray; 8-a train management system; 9-vehicle.
Detailed Description
At present, a liquid level detection technology is not popularized in rail transit vehicle storage battery products, visual observation methods and liquid level pipe methods are mostly adopted to measure the liquid level of the storage battery, and other methods adopt a centralized water injection system to replenish liquid for the storage battery.
Referring to fig. 1 and 2, according to the position where the liquid level detection host 3 is integrated, two detection methods, namely, a vehicle-mounted type and a ground type, are provided:
the method comprises the following steps: the vehicle-mounted liquid level detection method comprises a storage battery box 6, a storage battery pack, a storage battery tray 7, a pressure sensor 2 and a connector 5;
the liquid level detection host 3 is used for collecting pressure signals of a pressure sensor at the lower part of the storage battery 1, comparing and calculating the pressure signals through a step algorithm, and feeding back liquid level information of the storage battery 1 to a train management system in a serial port communication mode;
the train management system 8 is used for communicating with each electric system of the vehicle 9, a vehicle-mounted system for detecting and controlling the vehicle 9 by collecting the circuit state of the vehicle 9, and a man-machine interface display screen arranged in the train management system can display the state data and the functional data of vehicle parts and components returned by each system of the vehicle 9 and the liquid level detection host computer so as to assist drivers and passengers and maintainers to finish the related work of operation and maintenance of the vehicle 9;
the storage battery pack, the storage battery tray 7, the pressure sensors 2, the connector 5 and the liquid level detection host machine 3 are all located in the storage battery box 6, the storage battery pack is arranged in the storage battery tray 7, the pressure sensors 2 are preset below each storage battery 1, the connector 5 is integrated on one side of the storage battery tray 7, a connecting line of each pressure sensor 2 is connected with the connector 5, the connector 5 is connected with the liquid level detection host machine 3, the liquid level detection host machine 3 is connected with the train management system 8 and transmits information to the train management system, and sampling measurement is only carried out when the vehicle 9 stops (when the vehicle has a zero-speed signal) in consideration of factors caused by vibration in the running process of the vehicle 9.
The second method comprises the following steps: the ground type liquid level detection method comprises a storage battery box 6, a storage battery pack, a storage battery tray 7, a pressure sensor 2, a connector 5 and an upper computer 4;
the liquid level detection host 3 is used for collecting pressure signals of a pressure sensor at the lower part of the storage battery, comparing and calculating the pressure signals through a step algorithm, and feeding back storage battery liquid level information to the upper computer 4 in a serial port communication mode; the upper computer 4 is a computer pre-installed with liquid level detection maintenance software.
Storage battery, battery tray 7, pressure sensor 2 and connector 5 all be located battery box 6, storage battery arranges in battery tray 7, all predetermine pressure sensor 2 below every battery 1, connector 5 integrated in one side of battery tray 7, every pressure sensor 2's connecting wire all is connected with connector 5, liquid level detection host computer 3 set up subaerial, connector 5 is connected with liquid level detection host computer 3, host computer 4 be connected with liquid level detection host computer 3 set up host computer 4 and liquid level detection host computer 3 on ground and have the advantage that the loading is light in weight, with low costs.
The two methods can realize the liquid level detection function of the storage battery, and the specific steps are as follows:
(1) measuring the pressure value of the storage battery 1 at the lowest liquid level according to the pressure sensor 2, and taking the pressure value as standard minimum mass Msm;
replenishing liquid to a standard liquid level for the storage battery 1, recording liquid level information, and measuring a pressure value of the standard liquid level through a pressure sensor 2 to be used as a standard free mass Ms of each storage battery 1;
the storage battery 1 is replenished with liquid to the maximum liquid level scale mark, and the pressure value of the maximum liquid level is recorded by the pressure sensor 2 and is used as the standard maximum mass Msx of each storage battery 1;
(2) liquid is supplemented to all storage batteries 1 of the storage battery pack, and the liquid is supplemented to a standard liquid level;
according to the arrangement form of the storage battery pack, the pressure sensors 2 are arranged in the storage battery tray 7 and are installed completely, the storage batteries 1 are placed in the tray and connected and assembled to form the storage battery pack, and then the pressure value of the pressure sensor 2 at the lower part of each section of the assembled storage batteries 1 is recorded and serves as the standard assembling quality Ma of each section of the storage batteries 1.
(3) Subtracting the standard free mass Ms in the step (1) from the standard assembling mass Ma in the step (2) to obtain a correction coefficient delta;
calculating the maximum assembly quality Max (Msx + delta) through the correction coefficient;
calculating the minimum assembly quality Mam which is Msm + delta through the correction coefficient;
(4) through the assembly weight management to a single section of battery 1, judge its liquid level state:
when the weight M of the storage battery 1 is measured to be within the range that the Mam is less than the M and less than 110 percent of the Mam, setting a liquid overflow early warning of the storage battery 1;
when the measured weight M of the storage battery 1 is in an interval of Max > M > 90% Max, setting a liquid supplement early warning for the storage battery 1;
when the weight M of the storage battery 1 is measured to be within the range that M is less than 3% of Mam, setting a liquid supplementing alarm of the storage battery 1;
when the weight M of the storage battery 1 is measured to be within the range that M is more than 97% Max, setting a liquid overflow alarm of the storage battery 1;
(5) and (4) feeding back the position information to the liquid level detection host machine 3 through the connector 5 by using the pressure sensor 2 at the lower part of the storage battery 1 aiming at the storage battery 1 with liquid supplementing or liquid overflowing early warning and alarming in the step (4).
In the vehicle-mounted liquid level detection method, a liquid level detection host 3 collects pressure signals of a pressure sensor 2 at the lower part of each storage battery 1, compares and calculates the pressure signals through the algorithm of the steps, and feeds back liquid level information of each storage battery 1 to a man-machine interface display screen of a train management system 8 in a serial port communication mode, so that the position of a fault storage battery 1 in a storage battery pack is determined.
In the ground type liquid level detection method, when maintenance detection is needed, the connector 5 is connected to the liquid level detection host 3, the liquid level detection host 3 is connected with the upper computer 4, the liquid level detection host 3 collects pressure signals of the pressure sensor 2 at the lower part of each storage battery 1, comparison and operation are carried out through the algorithm of the steps, liquid level information of each storage battery 1 is fed back to the upper computer 4 in a serial port communication mode, and the detected information of each storage battery 1 is displayed in a man-machine interface, so that the position of a fault storage battery 1 in a storage battery pack is determined.
The single body of the storage battery 1 for overflow early warning or alarm needs to extract part of electrolyte so as to reach a reasonable interval of a liquid level line, or re-injecting the electrolyte after pouring out, and the method is specifically determined according to the storage battery process.
The monomer of the storage battery 1 for liquid supplementing early warning or alarm needs to calculate the liquid supplementing amount according to the difference between the measured mass M and the standard assembly mass Ma, so that a maintenance and repair guidance suggestion is formed, and the liquid supplementing can be performed on the liquid-deficient storage battery monomer through a quantitative liquid supplementing gun.
Referring to fig. 3 to 5, the storage battery liquid level detection method is mainly a detection method designed aiming at the relation between the liquid level height and the weight of the storage battery 1, a pressure sensor 2 and a connector 5 are integrated in a storage battery tray 7, the storage battery 1 is placed in a detection tray, the liquid level state of the storage battery 1 is measured and calculated by measuring the weight change caused by the liquid level change of the storage battery 1, liquid adding suggestions can be conveniently given by judging the amount of liquid supplement, and the accurate liquid injection of a rich liquid storage battery can be realized by matching with a quantitative liquid adding tool.
Referring to fig. 6, the liquid level detection host 3 mainly functions to collect pressure signals of the pressure sensor 2 at the lower part of the storage battery 1, compare and calculate the pressure signals through step algorithms, and feed back liquid level information of the storage battery 1 to the upper computer 4 or the train management system 8 in a serial port communication mode.
And (3) performing periodic calibration for the pressure sensor 2 used for a long time, and adjusting software correction in the liquid level detection host 3.
Claims (5)
1. The utility model provides a liquid level detection system of rich liquid formula storage battery which characterized in that: the device comprises a liquid level detection host, a storage battery tray, a pressure sensor and a connector;
the liquid level detection host is used for collecting pressure signals of a pressure sensor at the lower part of the storage battery, comparing and calculating the pressure signals through a step algorithm, and feeding back the liquid level information of the storage battery to the train management system in a serial port communication mode;
the train management system is used for communicating with each electric system of the vehicle, the vehicle-mounted system for detecting and controlling the vehicle by collecting the circuit state of the vehicle, and a man-machine interface display screen arranged in the train management system can display the state data and the functional data of vehicle parts and components returned by each system of the vehicle and the liquid level detection host computer so as to assist drivers and passengers to finish the related work of vehicle operation and maintenance;
the storage battery tray, the pressure sensors, the connectors and the liquid level detection host are all located in the storage battery box, the storage battery pack is arranged in the storage battery tray, the pressure sensors are preset below each storage battery, the connectors are integrated on one side of the storage battery tray, connecting lines of the pressure sensors are connected with the liquid level detection host through the connectors, and the liquid level detection host is connected with the train management system and transmits information to the train management system.
2. A liquid level detection method for a flooded battery pack is characterized by comprising the following steps: the flooded battery level detection system of claim 1, comprising the steps of:
(1) measuring the pressure value of the storage battery at the lowest liquid level according to the pressure sensor, and taking the pressure value as standard minimum mass Msm;
replenishing the liquid of the storage battery to a standard liquid level, recording liquid level information, and measuring a pressure value of the standard liquid level through a pressure sensor to be used as a standard free mass Ms of each storage battery;
supplementing the liquid to the maximum liquid level scale mark, and recording the pressure value of the maximum liquid level through a pressure sensor to be used as the standard maximum mass Msx;
(2) liquid supplementing is carried out on all storage batteries of the storage battery pack, and the liquid supplementing is carried out to a standard liquid level;
according to the arrangement form of the storage battery packs, the pressure sensors are arranged in the storage battery tray and are installed completely, the storage batteries are placed in the tray and are connected and assembled to form the storage battery packs, and then the pressure value of the pressure sensor of the lower battery of each assembled storage battery is recorded and serves as the standard assembly quality Ma of each storage battery.
(3) Subtracting the standard free mass Ms of the single storage battery in the step (1) from the standard assembling mass Ma in the step (2) to obtain a correction coefficient delta;
calculating the maximum assembly quality Max (Msx + delta) of each storage battery through the correction coefficient;
calculating the minimum assembly quality Mam of each storage battery as Msm + delta through the correction coefficient;
(4) through the assembly weight management to single section battery, judge its liquid level state:
when the weight M of the storage battery is measured to be within the range that the Mam is less than the range that the M is less than 110 percent, setting storage battery overflow liquid early warning;
setting a storage battery liquid supplementing early warning when the measured storage battery weight M is in an interval of Max > M > 90% Max;
when the weight M of the storage battery is measured to be within the range that M is less than 3% of Mam, setting a liquid supplementing alarm of the storage battery;
when the weight M of the storage battery is measured to be within the range that M is more than 97% Max, a storage battery overflow alarm is set;
(5) and (4) feeding back the position information to the liquid level detection host through the connector by using the pressure sensor at the lower part of the storage battery with the liquid supplementing or overflowing early warning and alarming function in the step (4).
(6) The liquid level detection host collects pressure signals of the pressure sensors at the lower parts of the storage batteries, compares and operates the pressure signals through the algorithm of the steps, and feeds back liquid level information of each storage battery to a man-machine interface display screen of a train management system in a serial port communication mode, so that the position of a fault storage battery in the storage battery pack is determined.
3. The utility model provides a liquid level detection system of rich liquid formula storage battery which characterized in that: the device comprises a liquid level detection host, a storage battery tray, a pressure sensor, a connector and an upper computer;
the liquid level detection host is used for collecting pressure signals of a pressure sensor at the lower part of the storage battery, comparing and calculating the pressure signals through a step algorithm, and feeding back the liquid level information of the storage battery to the upper computer in a serial port communication mode;
the storage battery tray, the pressure sensors and the connectors are all located in the storage battery box, the storage battery pack is arranged in the storage battery tray, the pressure sensors are all preset below each storage battery, the connectors are integrated on one side of the storage battery tray, the liquid level detection host is arranged on the ground, connecting wires of the pressure sensors are all connected with the liquid level detection host through the connectors, and the upper computer is connected with the liquid level detection host through a serial port communication protocol.
4. A flooded battery pack level detection system as claimed in claim 3, wherein: the upper computer is a computer pre-installed with liquid level detection and maintenance software.
5. A liquid level detection method for a flooded battery pack is characterized by comprising the following steps: a flooded battery level detection system as claimed in any one of claims 3 or 4, comprising the steps of:
(1) measuring the pressure value of the storage battery at the lowest liquid level according to the pressure sensor, and taking the pressure value as standard minimum mass Msm;
replenishing the liquid of the storage battery to a standard liquid level, recording liquid level information, and measuring a pressure value of the standard liquid level through a pressure sensor to be used as a standard free mass Ms of each storage battery;
supplementing the liquid to the maximum liquid level scale mark, and recording the pressure value of the maximum liquid level through a pressure sensor to be used as the standard maximum mass Msx of each storage battery;
(2) liquid supplementing is carried out on all storage batteries of the storage battery pack, and the liquid supplementing is carried out to a standard liquid level;
according to the arrangement form of the storage battery packs, the pressure sensors are arranged in the storage battery tray and are installed completely, the storage batteries are placed in the tray and are connected and assembled to form the storage battery packs, and then the pressure value of the pressure sensor of the lower battery of each assembled storage battery is recorded and serves as the standard assembly quality Ma of each storage battery.
(3) Subtracting the standard free mass Ms in the step (1) from the standard assembling mass Ma in the step (2) to obtain a correction coefficient delta;
calculating the maximum assembly quality Max (Msx + delta) of each storage battery through the correction coefficient;
calculating the minimum assembly quality Mam of each storage battery as Msm + delta through the correction coefficient;
(4) through the assembly weight management to single section battery, judge its liquid level state:
when the weight M of the storage battery is measured to be within the range that the Mam is less than the range that the M is less than 110 percent, setting storage battery overflow liquid early warning;
setting a storage battery liquid supplementing early warning when the measured storage battery weight M is in an interval of Max > M > 90% Max;
when the weight M of the storage battery is measured to be within the range that M is less than 3% of Mam, setting a liquid supplementing alarm of the storage battery;
when the weight M of the storage battery is measured to be within the range that M is more than 97% Max, a storage battery overflow alarm is set;
(5) and (4) feeding back the position information to the liquid level detection host through the connector by using the pressure sensor at the lower part of the storage battery with the liquid supplementing or overflowing early warning and alarming function in the step (4).
(6) When maintenance and detection are needed, the connector is connected to the liquid level detection host, the liquid level detection host is connected with the upper computer, the liquid level detection host collects pressure signals of the pressure sensors at the lower part of each storage battery, the pressure signals are compared and operated through the algorithm of the steps, liquid level information of each storage battery is fed back to the upper computer in a serial port communication mode, and the measured information of each storage battery is displayed in a human-computer interface, so that the position of a fault storage battery in the storage battery pack is determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111186277.4A CN113959521A (en) | 2021-10-12 | 2021-10-12 | Liquid level detection system and method for flooded storage battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111186277.4A CN113959521A (en) | 2021-10-12 | 2021-10-12 | Liquid level detection system and method for flooded storage battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113959521A true CN113959521A (en) | 2022-01-21 |
Family
ID=79464005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111186277.4A Pending CN113959521A (en) | 2021-10-12 | 2021-10-12 | Liquid level detection system and method for flooded storage battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113959521A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004342377A (en) * | 2003-05-13 | 2004-12-02 | Toyota Motor Corp | Power supply device for vehicle |
| CN104006862A (en) * | 2014-06-11 | 2014-08-27 | 江苏先特能源装备有限公司 | Lead-acid storage battery tester and acid filling liquid level detecting method thereof |
| CN107656211A (en) * | 2017-09-15 | 2018-02-02 | 武汉中航传感技术有限责任公司 | Batteries monitoring system |
| CN110600824A (en) * | 2019-10-09 | 2019-12-20 | 中车青岛四方车辆研究所有限公司 | Storage battery monitoring system and monitoring method for railway vehicle |
| CN210375302U (en) * | 2018-11-21 | 2020-04-21 | 朝阳市加华电子有限公司 | Differential pressure type accumulator liquid level meter |
| CN112670661A (en) * | 2020-12-28 | 2021-04-16 | 山东电亮亮信息科技有限公司 | Gassing fluid infusion management formula large capacity lithium titanate battery |
-
2021
- 2021-10-12 CN CN202111186277.4A patent/CN113959521A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004342377A (en) * | 2003-05-13 | 2004-12-02 | Toyota Motor Corp | Power supply device for vehicle |
| CN104006862A (en) * | 2014-06-11 | 2014-08-27 | 江苏先特能源装备有限公司 | Lead-acid storage battery tester and acid filling liquid level detecting method thereof |
| CN107656211A (en) * | 2017-09-15 | 2018-02-02 | 武汉中航传感技术有限责任公司 | Batteries monitoring system |
| CN210375302U (en) * | 2018-11-21 | 2020-04-21 | 朝阳市加华电子有限公司 | Differential pressure type accumulator liquid level meter |
| CN110600824A (en) * | 2019-10-09 | 2019-12-20 | 中车青岛四方车辆研究所有限公司 | Storage battery monitoring system and monitoring method for railway vehicle |
| CN112670661A (en) * | 2020-12-28 | 2021-04-16 | 山东电亮亮信息科技有限公司 | Gassing fluid infusion management formula large capacity lithium titanate battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106740132B (en) | A kind of electric automobile lithium battery intelligent monitoring management system | |
| CN107054107B (en) | Battery controller | |
| CN104881041B (en) | The electricity method for early warning and device of a kind of unmanned vehicle | |
| CN102866361B (en) | A kind of electric battery SOH estimation on line method | |
| CN103081212B (en) | The deterioration judging system of lithium rechargeable battery and deterioration judging method | |
| CN102778651B (en) | Determine the system and method for battery cell capacity value in many battery | |
| CN102636756B (en) | Automotive battery soc estimation based on voltage decay | |
| CN202696179U (en) | Battery management system | |
| CN201781037U (en) | Battery management system of electric automobile | |
| CN102939683A (en) | Value calculation device and value calculation method for secondary battery | |
| CN103930298B (en) | For the system and method for battery pack power prediction | |
| CN202309138U (en) | Lithium-iron-phosphate battery-managing system for substation direct-current power-supply system | |
| CN202330665U (en) | Monitoring device for state of storage battery for urban rail vehicle | |
| CN101454682A (en) | Battery soc estimation program, wireless transit system, andmethod of charging the battery | |
| CN102834727A (en) | Secondary battery degradation determination device and degradation determination method | |
| CN105620304B (en) | Battery pack thermal run away monitoring device and electric automobile | |
| CN107946673A (en) | The Vehicular dynamic battery management system and its management method of a kind of high robust | |
| CN106199437A (en) | Electromobile battery dump energy monitoring method and monitoring system thereof | |
| CN102331560A (en) | Method for estimating state of charge of nickel-metal hydride battery | |
| CN108663061B (en) | Electric automobile mileage estimation system and estimation method thereof | |
| CN206041528U (en) | Balanced battery management system of initiative | |
| CN106058334A (en) | Novel battery management system | |
| US20230391224A1 (en) | System and method for battery diagnosis according to altitude using atmospheric pressure sensor | |
| CN209571084U (en) | Power battery of pure electric automobile and management integration teaching training system | |
| CN102608536B (en) | Electric vehicle storage battery dump energy algorithm based on digital voltage sampling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |