CN116106814A - OCV probe disconnection detection method, system, equipment and medium - Google Patents

OCV probe disconnection detection method, system, equipment and medium Download PDF

Info

Publication number
CN116106814A
CN116106814A CN202211423316.2A CN202211423316A CN116106814A CN 116106814 A CN116106814 A CN 116106814A CN 202211423316 A CN202211423316 A CN 202211423316A CN 116106814 A CN116106814 A CN 116106814A
Authority
CN
China
Prior art keywords
ocv
probe
resistance
voltage
value
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
Application number
CN202211423316.2A
Other languages
Chinese (zh)
Inventor
李有财
蔡海波
张飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Nebula Electronics Co Ltd
Original Assignee
Fujian Nebula Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujian Nebula Electronics Co Ltd filed Critical Fujian Nebula Electronics Co Ltd
Priority to CN202211423316.2A priority Critical patent/CN116106814A/en
Publication of CN116106814A publication Critical patent/CN116106814A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • 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)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention provides an OCV probe disconnection detection method, an OCV probe disconnection detection system, OCV probe disconnection detection equipment and an OCV probe disconnection detection medium, and the method comprises the following steps: step S10, setting a first resistance, a second resistance and a voltage threshold, wherein the first resistance is larger than the second resistance; step S20, setting the input impedance of a voltmeter as the first resistance value, and carrying out primary voltage measurement on the lithium battery by the voltmeter through an OCV probe to obtain a first voltage value; step S30, setting the input impedance of the voltmeter as the second resistance value, and carrying out secondary voltage measurement on the lithium battery by the voltmeter through the OCV probe to obtain a second voltage value; and step S40, detecting whether the OCV probe is broken or not based on the voltage threshold value, the first voltage value and the second voltage value. The invention has the advantages that: the efficiency and the quality of OCV probe broken line detection are greatly improved.

Description

OCV probe disconnection detection method, system, equipment and medium
Technical Field
The invention relates to the technical field of lithium battery detection, in particular to an OCV probe disconnection detection method, an OCV probe disconnection detection system, OCV probe disconnection detection equipment and an OCV probe disconnection detection medium.
Background
In order to produce a lithium battery with high safety and excellent performance, the lithium battery needs to perform a series of tests, such as testing internal impedance to determine the performance of the lithium battery and testing open-circuit voltage to determine the safety of the lithium battery, by using an OCV test device after the production is completed.
OCV check out test set passes through the positive pole post and the negative pole post that OCV probe connection lithium cell and then carries out corresponding detection, and when the circuit disconnection of OCV probe, will directly influence measuring result's accuracy, leads to the erroneous judgement of disqualified product, influences the life of whole lithium cell, consequently needs to detect whether the disconnection of OCV probe.
For the detection of OCV probe broken line, whether the broken line is broken or not is conventionally judged by a naked eye observation or pulling method, and the method cannot be operated on line, so that the efficiency is low and the error is easy to judge.
Therefore, how to provide a method, a system, a device and a medium for detecting the disconnection of an OCV probe to improve the efficiency and quality of the disconnection detection of the OCV probe is a technical problem to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing an OCV probe disconnection detection method, an OCV probe disconnection detection system, OCV probe disconnection detection equipment and an OCV probe disconnection detection medium, so that the efficiency and the quality of OCV probe disconnection detection are improved.
In a first aspect, the present invention provides an OCV probe disconnection detecting method, including the steps of:
step S10, setting a first resistance, a second resistance and a voltage threshold, wherein the first resistance is larger than the second resistance;
step S20, setting the input impedance of a voltmeter as the first resistance value, and carrying out primary voltage measurement on the lithium battery by the voltmeter through an OCV probe to obtain a first voltage value;
step S30, setting the input impedance of the voltmeter as the second resistance value, and carrying out secondary voltage measurement on the lithium battery by the voltmeter through the OCV probe to obtain a second voltage value;
and step S40, detecting whether the OCV probe is broken or not based on the voltage threshold value, the first voltage value and the second voltage value.
Further, in the step S10, the first resistance is equal to or greater than 10gΩ, and the second resistance is one thousandth of the first resistance.
Further, in the step S10, the voltage threshold is 1V.
Further, the step S40 specifically includes:
calculating the absolute difference between the first voltage value and the second voltage value, judging whether the absolute difference is larger than a voltage threshold value, and if so, generating a detection result of OCV probe disconnection; if not, generating a detection result that the OCV probe is not broken.
In a second aspect, the present invention provides an OCV probe disconnection detecting system, comprising:
the parameter setting module is used for setting a first resistance value, a second resistance value and a voltage threshold value, wherein the first resistance value is larger than the second resistance value;
the voltage measurement primary measurement module is used for setting the input impedance of the voltmeter as the first resistance value, and the voltmeter performs primary voltage measurement on the lithium battery through the OCV probe to obtain a first voltage value;
the voltage measurement secondary measurement module is used for setting the input impedance of the voltmeter as the second resistance value, and the voltmeter performs secondary voltage measurement on the lithium battery through the OCV probe to obtain a second voltage value;
and the disconnection detection module is used for detecting whether the OCV probe is disconnected or not based on the voltage threshold value, the first voltage value and the second voltage value.
Further, in the parameter setting module, the first resistance is greater than or equal to 10gΩ, and the second resistance is one thousandth of the first resistance.
Further, in the parameter setting module, the voltage threshold is 1V.
Further, the disconnection detection module is specifically configured to:
calculating the absolute difference between the first voltage value and the second voltage value, judging whether the absolute difference is larger than a voltage threshold value, and if so, generating a detection result of OCV probe disconnection; if not, generating a detection result that the OCV probe is not broken.
In a third aspect, the present invention provides an OCV probe disconnection detecting apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of the first aspect when executing the program.
In a fourth aspect, the present invention provides an OCV probe wire breakage detection medium having stored thereon a computer program which when executed by a processor implements the method of the first aspect.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
when the input impedance of the voltmeter is set to be a first resistance value, the first voltage value is obtained by carrying out primary voltage measurement on the lithium battery through the OCV probe, when the input impedance of the voltmeter is set to be a second resistance value, the second voltage value is obtained by carrying out secondary voltage measurement on the lithium battery through the OCV probe, then the absolute difference between the first voltage value and the second voltage value is calculated, whether the OCV probe is disconnected can be judged by comparing the absolute difference with the preset voltage threshold, and the influence of the output impedance of the lithium battery is overcome by setting the first resistance value to be more than or equal to 10G omega, so that the voltage detection precision is improved, the misjudgment is avoided, the online detection of batches is carried out on a plurality of OCV probes through a plurality of voltmeters in specific implementation, and finally the efficiency and the quality of the disconnection detection of the OCV probe are greatly improved.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
FIG. 1 is a flow chart of an OCV probe disconnection detection method of the present invention.
Fig. 2 is a schematic structural diagram of an OCV probe disconnection detecting system of the present invention.
Fig. 3 is a schematic structural view of an OCV probe wire breakage detecting apparatus of the present invention.
FIG. 4 is a schematic diagram of the structure of an OCV probe wire breakage detection medium of the present invention.
Fig. 5 is an equivalent circuit diagram of the disconnection detection of the present invention.
Detailed Description
According to the OCV probe wire breakage detection method, system, equipment and medium, the efficiency and quality of OCV probe wire breakage detection are improved.
According to the technical scheme in the embodiment of the application, the overall thought is as follows: through adjusting the input impedance of voltmeter, carry out twice voltage measurement to the lithium cell through the OCV probe, judge whether the OCV probe breaks the line through the absolute difference of twice measuring result and voltage threshold's size relation, can carry out the on-line measuring of batch to a plurality of OCV probes, through setting for first resistance more than or equal to 10GΩ in order to overcome the influence of lithium cell's output impedance, and then promote OCV probe broken line detection's efficiency and quality.
Example 1
The embodiment provides an OCV probe disconnection detecting method, as shown in fig. 1 and 5, comprising the following steps:
step S10, setting a first resistance, a second resistance and a voltage threshold, wherein the first resistance is larger than the second resistance; the first resistance is far greater than the input impedance of the lithium battery;
step S20, setting the input impedance of a voltmeter as the first resistance value, and carrying out primary voltage measurement on the lithium battery by the voltmeter through an OCV probe to obtain a first voltage value;
step S30, setting the input impedance of the voltmeter as the second resistance value, and carrying out secondary voltage measurement on the lithium battery by the voltmeter through the OCV probe to obtain a second voltage value;
and step S40, detecting whether the OCV probe is broken or not based on the voltage threshold value, the first voltage value and the second voltage value. That is, whether the OCV probe is broken or not is judged by measuring two sets of voltage data.
In the step S10, the first resistance is equal to or greater than 10gΩ, and the second resistance is one thousandth of the first resistance.
When the output impedance of the lithium battery is larger, the voltage is divided with the input impedance of the voltmeter, and in order to avoid interference of the output impedance, the input impedance is set to be more than 10G omega, so that the influence of the output impedance of the lithium battery is greatly reduced, the voltage measurement precision is improved, and the OCV probe disconnection detection precision is further improved.
When the OCV probe is disconnected, the capacitor in the voltmeter basically does not discharge, so that a value similar to the voltage value just measured can be measured, and thus measurement errors are generated.
In the step S10, the voltage threshold is 1V.
The step S40 specifically includes:
calculating the absolute difference between the first voltage value and the second voltage value, judging whether the absolute difference is larger than a voltage threshold value, and if so, generating a detection result of OCV probe disconnection; if not, generating a detection result that the OCV probe is not broken.
Example two
The embodiment provides an OCV probe disconnection detecting system, as shown in fig. 2 and 5, including the following modules:
the parameter setting module is used for setting a first resistance value, a second resistance value and a voltage threshold value, wherein the first resistance value is larger than the second resistance value; the first resistance is far greater than the input impedance of the lithium battery;
the voltage measurement primary measurement module is used for setting the input impedance of the voltmeter as the first resistance value, and the voltmeter performs primary voltage measurement on the lithium battery through the OCV probe to obtain a first voltage value;
the voltage measurement secondary measurement module is used for setting the input impedance of the voltmeter as the second resistance value, and the voltmeter performs secondary voltage measurement on the lithium battery through the OCV probe to obtain a second voltage value;
and the disconnection detection module is used for detecting whether the OCV probe is disconnected or not based on the voltage threshold value, the first voltage value and the second voltage value. That is, whether the OCV probe is broken or not is judged by measuring two sets of voltage data.
In the parameter setting module, the first resistance is greater than or equal to 10gΩ, and the second resistance is one thousandth of the first resistance.
When the output impedance of the lithium battery is larger, the voltage is divided with the input impedance of the voltmeter, and in order to avoid interference of the output impedance, the input impedance is set to be more than 10G omega, so that the influence of the output impedance of the lithium battery is greatly reduced, the voltage measurement precision is improved, and the OCV probe disconnection detection precision is further improved.
When the OCV probe is disconnected, the capacitor in the voltmeter basically does not discharge, so that a value similar to the voltage value just measured can be measured, and thus measurement errors are generated.
In the parameter setting module, the voltage threshold is 1V.
The broken wire detection module is specifically used for:
calculating the absolute difference between the first voltage value and the second voltage value, judging whether the absolute difference is larger than a voltage threshold value, and if so, generating a detection result of OCV probe disconnection; if not, generating a detection result that the OCV probe is not broken.
Based on the same inventive concept, the application provides an electronic device embodiment corresponding to the first embodiment, and the details of the third embodiment are described in detail.
Example III
The embodiment provides an OCV probe disconnection detecting apparatus, as shown in fig. 3, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor executes the computer program to implement any one of the embodiments.
Since the electronic device described in this embodiment is a device for implementing the method described in the first embodiment of the present application, those skilled in the art will be able to understand the specific implementation of the electronic device and various modifications thereof based on the method described in the first embodiment of the present application, so how the method described in the embodiment of the present application is implemented in this electronic device will not be described in detail herein. The apparatus used to implement the methods of the embodiments of the present application are within the scope of what is intended to be protected by the present application.
Based on the same inventive concept, the application provides a storage medium corresponding to the first embodiment, and the details of the fourth embodiment are described in detail.
Example IV
The present embodiment provides an OCV probe disconnection detecting medium, as shown in fig. 4, on which a computer program is stored, which when executed by a processor, can implement any implementation of the first embodiment.
The technical scheme provided in the embodiment of the application has at least the following technical effects or advantages:
when the input impedance of the voltmeter is set to be a first resistance value, the first voltage value is obtained by carrying out primary voltage measurement on the lithium battery through the OCV probe, when the input impedance of the voltmeter is set to be a second resistance value, the second voltage value is obtained by carrying out secondary voltage measurement on the lithium battery through the OCV probe, then the absolute difference between the first voltage value and the second voltage value is calculated, whether the OCV probe is disconnected can be judged by comparing the absolute difference with the preset voltage threshold, and the influence of the output impedance of the lithium battery is overcome by setting the first resistance value to be more than or equal to 10G omega, so that the voltage detection precision is improved, the misjudgment is avoided, the online detection of batches is carried out on a plurality of OCV probes through a plurality of voltmeters in specific implementation, and finally the efficiency and the quality of the disconnection detection of the OCV probe are greatly improved.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.

Claims (10)

1. An OCV probe broken line detection method is characterized in that: the method comprises the following steps:
step S10, setting a first resistance, a second resistance and a voltage threshold, wherein the first resistance is larger than the second resistance;
step S20, setting the input impedance of a voltmeter as the first resistance value, and carrying out primary voltage measurement on the lithium battery by the voltmeter through an OCV probe to obtain a first voltage value;
step S30, setting the input impedance of the voltmeter as the second resistance value, and carrying out secondary voltage measurement on the lithium battery by the voltmeter through the OCV probe to obtain a second voltage value;
and step S40, detecting whether the OCV probe is broken or not based on the voltage threshold value, the first voltage value and the second voltage value.
2. The OCV probe disconnection detecting method of claim 1, wherein: in the step S10, the first resistance is equal to or greater than 10gΩ, and the second resistance is one thousandth of the first resistance.
3. The OCV probe disconnection detecting method of claim 1, wherein: in the step S10, the voltage threshold is 1V.
4. The OCV probe disconnection detecting method of claim 1, wherein: the step S40 specifically includes:
calculating the absolute difference between the first voltage value and the second voltage value, judging whether the absolute difference is larger than a voltage threshold value, and if so, generating a detection result of OCV probe disconnection; if not, generating a detection result that the OCV probe is not broken.
5. An OCV probe disconnection detecting system, characterized in that: the device comprises the following modules:
the parameter setting module is used for setting a first resistance value, a second resistance value and a voltage threshold value, wherein the first resistance value is larger than the second resistance value;
the voltage measurement primary measurement module is used for setting the input impedance of the voltmeter as the first resistance value, and the voltmeter performs primary voltage measurement on the lithium battery through the OCV probe to obtain a first voltage value;
the voltage measurement secondary measurement module is used for setting the input impedance of the voltmeter as the second resistance value, and the voltmeter performs secondary voltage measurement on the lithium battery through the OCV probe to obtain a second voltage value;
and the disconnection detection module is used for detecting whether the OCV probe is disconnected or not based on the voltage threshold value, the first voltage value and the second voltage value.
6. The OCV probe wire break detection system of claim 5, wherein: in the parameter setting module, the first resistance is greater than or equal to 10gΩ, and the second resistance is one thousandth of the first resistance.
7. The OCV probe wire break detection system of claim 5, wherein: in the parameter setting module, the voltage threshold is 1V.
8. The OCV probe wire break detection system of claim 5, wherein: the broken wire detection module is specifically used for:
calculating the absolute difference between the first voltage value and the second voltage value, judging whether the absolute difference is larger than a voltage threshold value, and if so, generating a detection result of OCV probe disconnection; if not, generating a detection result that the OCV probe is not broken.
9. An OCV probe wire break detection apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 4 when executing the program.
10. An OCV probe wire break detection medium having stored thereon a computer program, which when executed by a processor implements the method according to any one of claims 1 to 4.
CN202211423316.2A 2022-11-15 2022-11-15 OCV probe disconnection detection method, system, equipment and medium Pending CN116106814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211423316.2A CN116106814A (en) 2022-11-15 2022-11-15 OCV probe disconnection detection method, system, equipment and medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211423316.2A CN116106814A (en) 2022-11-15 2022-11-15 OCV probe disconnection detection method, system, equipment and medium

Publications (1)

Publication Number Publication Date
CN116106814A true CN116106814A (en) 2023-05-12

Family

ID=86264546

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211423316.2A Pending CN116106814A (en) 2022-11-15 2022-11-15 OCV probe disconnection detection method, system, equipment and medium

Country Status (1)

Country Link
CN (1) CN116106814A (en)

Similar Documents

Publication Publication Date Title
CN111458648B (en) Online detection method for health state of lithium ion battery
CN116245256B (en) Multi-factor-combined capacitor quality prediction method, system and storage medium
CN106886003B (en) Automatic testing system and method for battery monitoring module of electric vehicle
CN113945302B (en) Method and device for determining internal temperature of battery
CN111366859B (en) Method for detecting electric core of energy storage system
CN115079020A (en) Battery failure detection method, system, device storage medium, and vehicle
CN111679215A (en) Lithium battery real-time sorting method, device, equipment and storage medium
CN111239633B (en) Battery pack pressure difference reason analysis method and device and computer equipment
CN110006953A (en) Rosin joint detection method, system, device, computer equipment and readable storage medium storing program for executing
CN112748348B (en) Battery low-temperature performance distribution level detection method and system and storage medium
CN113433468A (en) Early fault fusion diagnosis method and safety early warning system for energy storage battery
CN116609642B (en) Chip test error compensation method and device, electronic equipment and storage medium
CN111157906B (en) SOC precision testing method, device and system
CN117741546A (en) Intelligent ammeter fault prediction method and device
CN116106814A (en) OCV probe disconnection detection method, system, equipment and medium
CN116736193A (en) Detection method and device of electric connection device, processor and vehicle
CN111044961B (en) Test machine self-checking system and test method
CN116008787A (en) DUT anomaly identification method, device and equipment for device under test
CN114894359A (en) Fuel cell stack fastening force detection method and device
CN109270480A (en) The method of detection source monitoring unit
CN112577456B (en) Measuring equipment point inspection method, operation control device and computer readable storage medium
CN117872093B (en) Method and system for online detection by using ATE
CN111220850A (en) Battery diaphragm resistance value measuring method and device
CN109425773A (en) A kind of current monitoring circuit, method and power supply
CN114325429A (en) Self-adaptive high-precision electricity metering method and system for lithium battery energy storage and storage medium

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